CN120439903A

CN120439903A - Child safety seat

Info

Publication number: CN120439903A
Application number: CN202510138367.8A
Authority: CN
Inventors: 张大亮; 曾湘勇
Original assignee: China Wonderland Nurserygoods Co Ltd
Current assignee: China Wonderland Nurserygoods Co Ltd
Priority date: 2024-02-07
Filing date: 2025-02-07
Publication date: 2025-08-08
Also published as: WO2025168056A1; TW202532270A

Abstract

The present invention relates to a child safety seat. The child safety seat includes a safety belt, a backrest body, and a headrest. The backrest body is formed with a plurality of shift grooves and a rod for looping the safety belt. The headrest is movably mounted on the backrest body and includes a headrest body and a headrest adjustment mechanism. The headrest adjustment mechanism includes a slider and a headrest engaging member. The slider is connected to the headrest body and is provided with a housing and a sliding groove. The headrest engaging member is disposed within the sliding groove and is movable between a headrest locking position and a headrest unlocking position. When the headrest engaging member is in the headrest locking position, the headrest engaging rod engages with one of the plurality of shift grooves. When the headrest engaging member is switched to the headrest unlocking position, the slider disengages the shift groove. The headrest body is provided with a safety belt passage, with at least a portion of the housing being located above the safety belt passage. A line connecting the rod and the safety belt passage passes through the housing, so that the safety belt disposed between the rod and the safety belt passage can be pressed against the housing.

Description

Child safety seat

Technical Field

The invention relates to the technical field of children products, in particular to a child safety seat.

Background

The child safety seat provides safety guarantee for children to travel by bus. To accommodate children of different sizes and heights, the headrest of the child safety seat is typically configured to be height adjustable so that the opposing backrest can be positioned at different height positions to provide comfortable head support for the child. In the existing child safety seat, the structure of a headrest adjusting mechanism for adjusting the height of the headrest is relatively complicated, and the headrest adjusting mechanism may be accidentally unlocked when the vehicle is used on a bumpy road, resulting in a sudden decrease in the height of the headrest.

In addition, some child safety seats in the market at present are also provided with heightening seat cushions, and the heightening seat cushions can be fixed on the vehicle seats through safety belts of the vehicle seats for older children to use. However, the prior heightening seat cushion has the problems of complex structure, inconvenient disassembly and the like.

Disclosure of Invention

A first aspect of the present invention provides a headrest portion having a simple structure and a child safety seat having the headrest portion. The child safety seat according to the first aspect includes a seat belt, a backrest body, and a headrest portion. The back rest body is formed with a plurality of gear grooves and a lever for winding the seat belt. The headrest portion is movably arranged on the backrest body and comprises a headrest body and a headrest adjusting mechanism. The headrest adjusting mechanism comprises a sliding piece and a headrest clamping piece. The sliding piece is connected to the headrest body and is provided with a shell and a sliding groove. The headrest clamping piece is arranged in the sliding groove in a penetrating way and can move between a headrest locking position and a headrest unlocking position. When the headrest clamping piece is positioned at the headrest locking position, the headrest clamping piece is clamped with one of the gear grooves. When the headrest clamping piece is switched to the headrest locking position, the sliding piece is separated from the plurality of gear grooves. The headrest body is provided with a safety belt penetrating opening, and at least one part of the shell is positioned above the safety belt penetrating opening. The wire between the rod and the webbing aperture passes through the housing so that the webbing disposed between the rod and the webbing aperture can be pressed against the housing.

In the first aspect described above, the extension surface of the rear surface of the housing passes through the lever such that the webbing on the front side of the lever is pressed against the slider, and the webbing on the rear side of the lever is spaced apart from the slider.

In the first aspect, the lower end of the rear surface of the housing has a guide surface for guiding the webbing, and the guide surface is a slope or a convex cylindrical surface.

In the above first aspect, the backrest body is provided with a sliding groove extending longitudinally along the backrest body and penetrating the surface of the backrest body, and the sliding member is in sliding fit with the sliding groove, so that at least a portion of the housing is disposed in the sliding groove. The rod is located above the sliding groove. The plurality of gear grooves are linearly distributed along the two sides of the sliding groove, and the opening directions of the plurality of gear grooves are opposite to the headrest body.

In the above first aspect, the backrest body is provided with a first fitting portion, an extending direction of the first fitting portion is parallel to an extending direction of the sliding groove, and the slider is provided with a second fitting portion. One of the first matching part and the second matching part is a groove, the other of the first matching part and the second matching part is a convex rib, and the first matching part and the second matching part are in concave-convex matching.

In the above first aspect, the back body is provided with a plurality of gear ribs, each gear groove is formed in the plurality of gear ribs at the same time, the opening direction of the plurality of gear grooves faces away from the head rest body, each gear groove has a downward inclined surface, and a stop protrusion for stopping the head rest engaging member from sliding off the inclined surface is formed at the end of the inclined surface.

In the first aspect, the two sides of the sliding groove are respectively provided with the protruding parts, and the plurality of protruding parts are respectively located above and/or below the gear groove.

In the first aspect described above, the shaft center of the lever is located forward of the extension surface of the rear surface of the housing. In the first aspect described above, the lever includes the lever main body and the rotating sleeve rotatably fitted over the lever main body, and the webbing is adapted to be wound around the rotating sleeve.

In the first aspect, the headrest adjusting mechanism further includes a headrest driving member movably connected to the headrest portion and in driving connection with the headrest engaging member. The headrest clamping piece comprises a headrest clamping rod, and the headrest clamping rod at least partially extends out of the sliding piece. The headrest driving piece is provided with a driving groove, and an included angle between the extending direction of the sliding groove and the extending direction of the driving groove is an acute angle. The headrest clamping rod penetrates through the sliding groove and the driving groove and can slide along the extending direction of the sliding groove and the driving groove.

In the above first aspect, the sliding member has a first accommodating groove, the first accommodating groove is communicated with the sliding groove, one end of the first accommodating groove is an open end, the other end of the first accommodating groove is formed as a limiting end, and at least a portion of the headrest driving member is slidably disposed in the first accommodating groove and adapted to be blocked by the limiting end.

In the above first aspect, the headrest adjusting mechanism further includes a first reset member disposed between the sliding member and the headrest driving member, the first reset member being adapted to bias the headrest driving member to drive the headrest engaging lever to move toward the headrest locking position.

In the above first aspect, the slider is provided with a first accommodating groove and a second accommodating groove which are communicated with each other, at least a part of the headrest driving member is accommodated in the first accommodating groove and is provided with the abutment surface, one end of the first resetting member is accommodated in the second accommodating groove and abuts against an end of the second accommodating groove, and the other end of the first resetting member extends into the first accommodating groove and abuts against the abutment surface.

In the above first aspect, the headrest portion further includes a headrest operating member operatively disposed on the headrest body and drivingly connected to the headrest driving member, the headrest body being provided with a penetration passage, the headrest operating member further includes an operating portion and a connecting arm connected between the operating portion and the headrest driving member, the connecting arm extending in a longitudinal direction of the headrest body, the operating portion being movably disposed on a front surface of the headrest body, at least a portion of the headrest driving member penetrating through the penetration passage and extending to a rear surface of the headrest body.

A second aspect of the present invention provides a booster seat that includes a seat body, a connecting mechanism, and a retaining mechanism. The connecting mechanism is arranged on the seat cushion main body and is suitable for being connected with a backrest part of the child safety seat, and comprises a clamping piece which is movably connected with the seat cushion main body and is switched between a clamping locking position and a clamping unlocking position. The retaining mechanism is movably connected with the seat cushion main body and can be switched between a retaining lock-releasing position and a retaining lock position. When the holding mechanism is positioned at the holding locking position, the holding mechanism is clamped with the connecting mechanism, so that the clamping piece is held at the clamping releasing locking position. When the retaining mechanism is located at the retaining and unlocking position, the retaining mechanism is released from clamping with the connecting mechanism, so that the clamping piece is allowed to be switched to the clamping and locking position.

In the above second aspect, the holding mechanism includes a holding member connected to the seat cushion body and a third restoring member provided between the holding member and the seat cushion body. The holding member includes a driving portion for clamping the connection mechanism, and a transmission portion connected to the driving portion for driving the holding member in a direction to hold the lock release position, and the third reset member is configured to bias the holding mechanism in a direction to hold the lock position.

In the second aspect, the third restoring member includes a first elastic member, where the first elastic member is a compression spring, a tension spring, or a spring plate.

In the above second aspect, the driving portion is rotatably provided on the first pivot shaft and the transmission portion rotatably abuts or releases the abutment with the first elastic member in accordance with the movement of the driving portion relative to the seat cushion main body, so that the retaining mechanism is switched between the retaining lock position and the retaining lock position.

In the second aspect described above, the transmission portion includes a cross bar. The first elastic piece is arranged between the cross rod and the seat cushion main body, and the cross rod can be switched between abutting against the first elastic piece and pushing away from the first elastic piece through the movement of the driving part relative to the seat cushion main body.

In the above second aspect, the seat cushion main body includes a first housing and a second housing that are engaged and form a seat cushion cavity of the booster seat cushion for accommodating the connecting mechanism and the holding mechanism.

In the second aspect, an opening is formed in the first housing, the driving portion includes a rotation protrusion pivotally connected to the transmission portion via a first pivot, the rotation protrusion protrudes from the opening to the outside of the cushion cavity when the retaining mechanism is in the retaining lock position, and the rotation protrusion is accommodated in the cushion cavity when the retaining mechanism is in the retaining lock position.

In the second aspect, the seat cushion body includes a guide groove recessed toward the inner space, the opening is located in the guide groove, and the rotation boss has a slope inclined toward an entrance direction of the guide groove.

In the second aspect, the engaging member includes an engaging connecting portion, the connecting mechanism further includes a first operating member, an operating connecting portion and an operating block integrally formed with the operating connecting portion are formed on the first operating member, the transmission portion is engaged with the operating block, the engaging connecting portion is slidably connected with the operating connecting portion, so that the engaging member is switched between the engaging locking position and the engaging releasing locking position, the operating connecting portion includes a driving groove, the engaging connecting portion is a lever, and the lever is connected to the driving groove and slides in the driving groove, so as to allow the engaging member to be switched between the engaging locking position and the engaging releasing locking position.

In the above second aspect, the connecting mechanism further includes a fourth restoring member, one end of which is connected to the seat cushion main body and the other end of which is connected to the engaging member, the fourth restoring member biases the engaging member toward the locking position by sliding between the engaging connecting portion and the operation connecting portion, and the fourth restoring member includes a second elastic member, which is a spring or a leaf spring.

In the above second aspect, the engaging piece includes an engaging pin, the seat cushion main body includes a seat cushion engaging hole, and the engaging pin is insertable into and protrudes from the seat cushion engaging hole so as to switch between the engagement locking position and the engagement releasing position.

In the second aspect, the operation block is further formed with a first stopper hole extending a certain length along a moving direction thereof. The first operating member includes a stopper post that passes through the first stopper hole and is fixed in the seat cushion body so that the first operating member can move relative to the seat cushion body.

In the second aspect, the operation block is further formed with an operation recess, and the seat cushion body includes an engagement opening, the operation recess is formed to be recessed from an outside of the seat cushion body toward an inside and is exposed outward from the engagement opening, and the seat cushion body includes a second stopper rib provided along a movement direction of the first operation member so that the first operation member abuts on the second stopper rib.

In the second aspect, the operation block is further formed with a limit projection projecting from a surface of the operation block opposite to an outward exposed surface of the operation recess, the second limit rib is formed with a locking recess having a shape matching the limit projection, and the limit projection is locked to or unlocked from the locking recess as the locking member is switched between the locking position and the locking position.

In the above second aspect, the seat cushion body further includes armrest portions provided on both sides of the seat cushion body and extending upward from an upper surface of the seat cushion body at an angle to the upper surface, and forming a first pocket adapted for passing a vehicle seat belt.

In the above second aspect, the armrest portion includes a storage recess formed by a portion of the seat cushion body outside the seat cushion cavity and having a receiving space. The storage concave part comprises a storage connecting hole and a connecting groove. The heightening seat cushion also comprises a storage cup, wherein the storage cup comprises a connecting column protruding from the bottom of the storage cup and a cup connecting protrusion protruding from the side surface of the storage cup. The connecting column can be inserted into the object placing connecting hole, and the cup connecting convex clamp is connected with the connecting groove.

A third aspect of the present invention provides a child safety seat. The child safety seat includes a back rest portion and a booster seat cushion according to the second aspect described above. The heightened seat cushion is detachably connected with the backrest part. The seatback portion includes a retainer driving portion that drives the retaining mechanism relative to the seat cushion body to the retaining lock-releasing position when the heightened seat cushion is connected to the seatback portion, thereby allowing the engaging piece to be switched to the engaging lock position.

In the above third aspect, the backrest portion includes a backrest body, and the backrest body further includes a backrest limit rib and an engaging piece receiving portion. The seat cushion main body comprises a matching rib, the backrest limiting rib is matched with the matching rib to limit the relative movement between the backrest part and the heightening seat cushion, and the clamping piece receiving part is clamped with the clamping piece.

In the above third aspect, the engaging piece includes an engaging pin, the engaging piece receiving portion includes a backrest engaging hole, the engaging pin is inserted into the backrest engaging hole, the backrest portion includes a reinforcing pipe fixedly installed in the backrest body and extending from a backrest upper portion to a backrest lower portion of the backrest body, and a first reinforcing hole is included at a position opposite to the engaging piece receiving portion, and the engaging piece is inserted into the first reinforcing hole through the engaging piece receiving portion.

In the above third aspect, the holder driving portion includes a driving projection capable of pushing the holding mechanism in the holding lock position direction when the booster seat cushion is connected to the back portion.

In the above third aspect, the child safety seat further includes a base including a base main body, an engaging portion, and a pivot portion extending upward from the base main body at an angle relative to the base main body, and an angle adjusting mechanism engaged with the angle adjusting mechanism and rotatably connected with a backrest body of the backrest portion through a second pivot, the angle adjusting mechanism being movably connected to the base and movably connected to the backrest portion so as to adjust an angle of the backrest portion relative to the base.

In the above third aspect, the angle adjusting mechanism includes a fifth restoring member and a second operating member. The fifth restoring member has one end connected to the back portion and movable with respect to the back portion and the other end connected to the second operating member. The second operating member is rotatably connected to the backrest body at one end and movably connected to the base at the other end through a third pivot, and moves the backrest portion relative to the base through a fifth restoring member when a force is applied to the backrest portion.

In the above third aspect, the fifth restoring member includes a third elastic member, one end of the third elastic member is connected to the backrest body, the second operating member includes a rotating portion rotatably connected to the backrest body, and a sliding portion, one end of the sliding portion is connected to the base and the other end is connected to the third elastic member and is slidable with respect to the base, the base includes a gear portion protruding from the base body, the gear portion includes at least one angle shift groove formed at an angle obliquely upward from the base body in a running direction of the fifth restoring member, the sliding portion includes a foot engaged with the gear portion, and the gear pin passes through and is engaged on the angle shift groove.

In the above third aspect, the shift portion further includes an angular shift rib that at least partially surrounds the angular shift groove in a movement direction along the shift pin, thereby stopping the shift pin in the angular shift groove.

In the above third aspect, the child safety seat further includes a reinforcement pipe fixedly mounted in the backrest portion and including a second reinforcement hole at a position opposite to the second pivot shaft, the second pivot shaft being inserted into the second reinforcement hole through the connection hole at the backrest body.

In the above third aspect, the reclining body of the reclining portion includes a storage recess above with respect to the booster seat cushion. The storage recess is formed by recessing the back rest body to a side opposite to a side where the back rest portion and the booster cushion are surrounded. The backrest portion includes a cover rotatably inserted into the backrest body and closing the storage recess.

In the third aspect, the cover may be formed with an elastic finger and a window, the elastic finger protruding from one end of the cover and being bent. The elastic finger protrudes from the window toward a face of the cover body that faces the storage recess when the cover body is closed. The resilient finger includes a locating step on a surface of the resilient finger proximate the free end projection. The storage recess includes a positioning rib protruding from the backrest body toward the storage recess. The positioning step can be clamped on the positioning rib, so that the storage concave part is closed.

In the above third aspect, the child safety seat further includes a headrest detachably assembled to an upper portion of the backrest portion and adapted to receive a child's head.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the description of the embodiments will be briefly described below, it being clear that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Moreover, the drawings are not to a 1:1 scale, and the relative sizes of various components are merely exemplary in the drawings and are not necessarily drawn to true scale. In the drawings:

FIG. 1 illustrates a perspective view of a child safety seat according to an embodiment of the invention;

FIG. 2 shows a perspective view of the child safety seat of FIG. 1 after the headrest has been adjusted up;

FIG. 3 shows a perspective view of the child safety seat of FIG. 1 in another view, wherein the child safety seat is configured with a seat belt;

FIG. 4 illustrates a perspective view of the child safety seat of FIG. 2 from another perspective with one of the sliders removed;

FIG. 5 illustrates a partial view of a cross-sectional view of the child safety seat of FIG. 3 taken along line U1-U1;

FIG. 6 shows a partial view of a cross-sectional view of the child safety seat of FIG. 3 taken along line U1-U1 after the headrest has been raised;

FIG. 7 illustrates a cross-sectional view of the child safety seat of FIG. 1 taken along line U2-U2;

FIG. 8 illustrates a perspective view of a headrest portion according to an embodiment of the present invention;

FIG. 9 shows a perspective view of the headrest of FIG. 7 after removal of one of the slides;

FIG. 10 shows a perspective view of the headrest of FIG. 8 from another perspective;

FIG. 11 shows a cross-sectional view of the headrest of FIG. 10 taken along line U3-U3, and

Fig. 12 shows a perspective view of a slider according to an embodiment of the present invention.

FIG. 13 illustrates a perspective view of a child safety seat according to another embodiment of the invention;

FIG. 14 shows a perspective view of the booster seat of FIG. 13;

FIG. 15 shows a perspective view of the child safety seat of FIG. 13 with the booster seat removed;

FIG. 16 shows a perspective view of the booster seat of FIG. 14 from another perspective;

FIG. 17 shows a perspective view and a partial enlarged view of the child safety seat of FIG. 13 with the booster seat cushion removed;

FIG. 18 is a bottom perspective view of the booster seat of FIG. 13;

FIG. 19 is a cross-sectional view and partial enlarged view of the child safety seat of FIG. 13 taken along line A1-A1 with the booster seat cushion fully incorporated into the child safety seat;

FIG. 20 is a cross-sectional view and partial enlarged view of the child safety seat of FIG. 13 taken along line A2-A2, wherein the booster cushion has not yet been fully incorporated into the child safety seat;

FIG. 21 illustrates a perspective view of the booster seat cushion with the second housing removed, with the attachment mechanism in a snap-lock position, in accordance with an embodiment of the present invention;

FIG. 22 illustrates a cross-sectional view of the child safety seat of FIG. 13 taken along line B-B with the attachment mechanism in a snap-lock position;

FIG. 23 shows a perspective view of the booster seat cushion with the second housing removed, with the attachment mechanism in the snap-lock position, in accordance with an embodiment of the invention;

FIG. 24 illustrates a perspective view of a booster seat cushion in accordance with an embodiment of the invention, in another view, showing the bottom of the booster seat cushion and the attachment mechanism in a snap-lock position;

FIG. 25 illustrates a perspective view of the booster seat cushion from another perspective with the second shell removed, with the attachment mechanism in the snap-lock position, in accordance with one embodiment of the present invention;

FIG. 26 illustrates a view of a booster seat cushion in accordance with an embodiment of the invention, in another view, with the attachment mechanism in a snap-lock position;

FIG. 27 shows a perspective view of the child safety seat of FIG. 13 from another perspective;

FIG. 28 illustrates a cross-sectional view of the child safety seat of FIG. 27 taken along line C-C, with the angle adjustment mechanism adjusted to a minimum height relative to the base;

FIG. 29 illustrates a cross-sectional view of the child safety seat of FIG. 27 taken along line C-C, with the angle adjustment mechanism adjusted to another height relative to the base;

FIG. 30 shows a perspective view of a base according to an embodiment of the invention;

FIG. 31 is a bottom schematic view of a child safety seat with a base removed according to one embodiment of the invention;

FIG. 32 is a schematic diagram illustrating a cross-section of the child safety seat of FIG. 27 taken along D-D;

FIG. 33 illustrates a perspective view of a child safety seat with one side of the cup removed, according to one embodiment of the invention;

FIG. 34 shows a perspective view of the cup;

FIG. 35 shows a perspective view of the child safety seat of FIG. 13 from another perspective, with the cover closing the storage recess;

FIG. 36 shows a cover according to an embodiment of the invention;

FIG. 37 is a schematic view of the child safety seat of FIG. 35 with the cover removed, and

FIG. 38 illustrates a partially exploded view of a child safety seat with the seat shell removed, according to an embodiment of the invention.

Reference numerals

10. A child safety seat;

200. Base, 201, base upper shell, 202, base lower shell, 210, base main body, 211, base upper surface, 220, gear part, 221, angle gear groove, 222, angle gear rib, 223, concave table, 230, joint part, 240, pin joint part;

100. a seat assembly;

1000. 1100, back body, 1110, front of back body, 1120, back of back body, 1200, sliding groove, 1210, first sliding groove, 1220, second sliding groove, 1300, gear rib, 1310, first gear rib, 1320, second gear rib, 1330, third gear rib, 1400, gear groove, 1400a, first gear recess, 1400b, second gear recess, 1400c, third gear recess, 1410, upper side wall of gear groove, 1411, limit protrusion, 1420, lower side wall of gear groove, 1421, stop protrusion, 1430, bottom wall of gear groove, 1500, first mating portion, 1600, protrusion, 1610, first protrusion, 1620, second protrusion;

1700. a reinforcing rod 1710, a rod body 1720, a rotating sleeve;

2000. 2100, seating surface;

3000. A headrest portion;

3100. The headrest comprises a headrest body, a front surface of the headrest body 3111, a back surface of the headrest body 3112, 3120, a mounting part, 3130, a safety belt threading opening, 3140, a threading channel and 3150, and an adapting part;

3200. Headrest adjusting mechanism, 3210, headrest engaging member, 3211, headrest engaging rod, 3220, headrest operating member, 3221, operating portion, 3222, connecting arm, 3223, operation connecting portion, 3225, abutment surface, 3226, accommodating recess, 3227, connection opening, 3230, slider, 3231, housing, 3232, upper side, 3233, guide surface, 3234, sliding groove, 3235, second fitting portion, 3236, first accommodation groove, 3237, limit end, 3238, second accommodation groove, 3239, first boss, 3240, first reset member, 3250, second reset member, 3260, headrest driving member, 3261, driving groove;

3300. The fixing seat 3310, the limiting part 3311, the limiting wall part 3312, the connecting lug part 3313, the limiting pin, 3320, the seat body part, 3321, the accommodating groove, 3330, the limiting space, 3340 and the second boss;

4000. The back rest part, 4100, the back rest body, 4111, the back rest upper part, 4112, the back rest lower part, 4120, the back rest limiting rib, 4130, the fastener receiving part, 4131, the back rest fastening hole, 4140, the holder driving part, 4141, the driving lug, 4142, the recess, 4150, the connecting hole, 4160, the storage recess, 4161, the positioning rib, 4162, the storage connecting groove, 4200, the cover, 4210, the elastic finger, 4211, the positioning step, 4220, the window, 4230, the hand-held part, 4240, the cover connecting rod, 4300, the reinforcing tube, 4310, the first reinforcing hole, 4320, the second reinforcing hole;

5000. heightening the seat cushion;

5100. The seat cushion comprises a seat cushion main body, 5111, a first shell, 5112, a second shell, 5113, a seat cushion cavity, 5121, an upper surface, 5122, a lower surface, 5130, a first limit rib, 5140, a second limit rib, a clamping concave 5141, a guide groove 5150, an opening 5151, a seat cushion clamping hole 5160, a handrail 5170, 5171, a first sleeve hole, 5172, a storage concave part, 5172a, a storage connecting hole, 5172b, a connecting groove, 5180, a matching rib, 5190 and a clamping opening.

5200. The connecting mechanism comprises a connecting mechanism, a clamping piece, a 5211, a clamping connecting part, a 5212, a clamping pin, a 5220, a first operating piece, a 5221, an operating connecting part, a 5221a, a driving groove, a 5222, an operating piece, a 5222a, a blocking rib, a 5222b, a first limiting hole, a 5222c, an operating concave part, a 5222d, a limiting bump, a 5222e, an operating piece space, a 5230, a fourth reset piece, a 5231, a second elastic piece, a 5240 and a limiting column;

5300. The device comprises a holding mechanism, a holding piece, a 5311, a driving part, a 5311a, a rotating lug, a 5312, a transmission part, a 5312a, a cross rod, a 5312b, a clamping end, a 5320, a third resetting piece, a 5321 and a first elastic piece;

5400. 5410, connecting column, 5420, cup connecting convex;

6000. angle adjusting mechanism 6100, fifth reset element 6110, third elastic element 6200, second operation element 6200, rotation part 6220, sliding part 6221, foot;

7100. First pivot, 7200, second pivot, 7300, third pivot, 7400, gear pin.

300. A seat belt;

S, an extension surface, L, left, R, right, F, front, B and back;

Detailed Description

In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the invention, whereby the invention is not limited to the specific embodiments disclosed below.

When a feature or element is referred to herein as being "on" another feature or element, it can be directly on the other feature or element or intervening features and/or elements may also be present. In contrast, when a feature or element is referred to as being "directly on" another feature or element, there are no intervening features or elements present. It will also be understood that when a feature or element is referred to as being "connected," "attached," or "coupled" to another feature or element, it can be directly connected, attached, or coupled to the other feature or element, or intervening features or elements may be present. In contrast, when a feature or element is referred to as being "directly connected," "directly attached," or "directly coupled" to another feature or element, there are no intervening features or elements present.

Although the terms "first" and "second" may be used herein to describe various features or elements, these features or elements should not be limited by these terms unless otherwise specified. These terms may be used to distinguish one feature or element from another feature or element. Thus, a first feature or element discussed below could be termed a second feature or element, and, similarly, a second feature or element discussed below could be termed a first feature or element. Herein, "plurality" means at least two, e.g., two, three, etc., unless explicitly and specifically defined otherwise. The terms "a" or "an" and the like do not necessarily denote a limitation of quantity. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", etc. are used merely to indicate relative positional relationships, which may also be changed when the absolute position of the object to be described is changed. Unless specifically indicated otherwise, the terms "upward", "downward", "vertical", "horizontal", and the like are used herein for illustration only.

Herein, "front" means a side that faces back when the child safety seat is fixed to the seat of the vehicle, and "rear" means a side that faces back when the child safety seat is fixed to the seat of the vehicle, and "left" means a side that is located leftward when viewed from the rear side to the front side of the child safety seat, and "right" means a side that is located rightward when viewed from the rear side to the front side of the child safety seat. Other directional terms referred to herein as "front", "back", "left", "right" have similar meanings. It should be noted that unless explicitly stated and limited otherwise, the terms of orientation of the various components of the child safety seat herein such as "front", "rear", "left", "right", etc., are based on the orientation shown in the drawings. These orientation terms will change correspondingly as the components of the child safety seat rotate. The "left" and "right" directions are schematically illustrated by arrows L, R in the figures, and the "front" and "rear" directions are schematically illustrated by arrows F, B. These directional terms are used only to make the description of the embodiments of the present invention clearer and are not used to unduly limit the scope of the present invention.

Fig. 1-4 schematically illustrate a child safety seat 10 according to an embodiment of the present invention. The child safety seat 10 includes a base 200, a seat assembly 100 disposed on the base 200. The seat assembly 100 is capable of angular adjustment relative to the base 200. In use, the seat assembly 100 is placed on a vehicle seat for use in conjunction with the base 200. In other embodiments, the child safety seat 10 may not be provided with the base 200. In use, the seat assembly 100 may be used by being placed directly on a vehicle seat.

The seat assembly 100 includes a back portion 1000, a seat portion 2000, and a headrest portion 3000. Seat 2000 is provided on back rest 1000. The headrest 3000 is movably provided to the backrest 1000. In particular, the headrest 3000 is provided on the backrest 1000 such that the headrest 3000 can be height-adjusted with respect to the backrest 1000.

In the present embodiment, the seat 2000 is detachably connected to the backrest 1000. The seat 2000 has a first usage mode connected to the backrest 1000 for use with the backrest 1000, and a second usage mode separated from the backrest 1000 for use alone. In the first usage mode, the seat portion 2000 and the backrest portion 1000 together define a seating space of the child safety seat 10, and the child is restrained within the seating space by the seat belt 300. The first mode of use is suitable for use with children of a smaller age group (e.g., one to four years), and the child safety seat 10 in this mode may be either a forward-facing child seat or a rearward-facing child seat. In the second use mode, the seat 2000 and the backrest of the vehicle seat together define a seating space of the seat 2000 in which a child can be restrained by the seat belt of the vehicle seat. The second mode of use is suitable for use by children of older ages (e.g., four to twelve years), and the seat 2000 in this mode may be used in a forward direction. Through the seat 2000 that can dismantle the setting for thereby children's safety seat 10 have multiple mode of use to satisfy different age bracket children's user demand, improved children's safety seat 10's rate of use. In particular, the seat 2000 can raise the child seated thereon to an appropriate height so that the seat belt of the vehicle seat can be correctly worn on the child. Such seats are also known as "Booster seats" or "child Booster seats".

The backrest 1000 includes a backrest body 1100, the backrest body 1100 having oppositely disposed front 1110 and back 1120 sides. The seat 2000 is connected to the backrest body 1100, and an upper surface of the seat 2000 forms a seating surface 2100 suitable for a child to sit on. The front face 1110 of the backrest body and the seating surface 2100 of the seat 2000 cooperate to define a seating space. The longitudinal direction of the backrest body 1100 is substantially perpendicular to the seating surface 2100 of the seat 2000. In the present embodiment, the seat 2000 is disposed obliquely to the base 200, and in particular, the seating surface 2100 of the seat 2000 is disposed obliquely to the lower surface of the base 200. The lower surface of the base 200 is substantially parallel to the horizontal plane. Accordingly, the longitudinal direction of the backrest body 1100 substantially perpendicular to the seating surface 2100 of the seat 2000 is inclined with respect to the vertical direction such that the longitudinal direction of the backrest body 1100 forms an acute angle with the rearward direction F. In addition, in order to clearly see the sliding groove 1200 of the front face 1110 of the backrest body 1100, a portion of the seat belt 300 and the headrest 3000 including the belt penetration 3130 is omitted in fig. 1 and 2, and the entire structure of the headrest 3000 will be shown in fig. 8 to 10.

As shown in fig. 3 and 4, the back body 1100 is provided with a sliding groove 1200 and a plurality of gear ribs 1300 provided at both sides of the sliding groove 1200. The sliding groove 1200 extends in the longitudinal direction of the backrest body 1100 and is provided through the backrest body 1100, that is, corresponds to the sliding groove 1200 extending substantially in the height direction of the backrest body 1100 and is provided through the front face 1110 and the rear face of the backrest body. The plurality of gear ribs 1300 are respectively disposed at both sides of the sliding groove 1200 and extend in the longitudinal direction of the back body 1100. A plurality of gear grooves 1400 are formed on the plurality of gear ribs 1300, and the plurality of gear grooves 1400 are distributed in the longitudinal direction of the backrest body 1100. The sliding groove 1200 is used for sliding the headrest 3000 along the longitudinal direction of the backrest body 1100 to adjust the height of the headrest 3000, and the plurality of gear grooves 1400 are used for locking the headrest 3000 at the corresponding height. The structure of the headrest 3000 will be described in detail later.

The number of the sliding grooves 1200 is two, but is not limited thereto. In the present embodiment, the two sliding grooves 1200 are a first sliding groove 1210 and a second sliding groove 1220, respectively. The plurality of gear ribs 1300 includes a first gear rib 1310, a second gear rib 1320, and a third gear rib 1330, the first gear rib 1310, the second gear rib 1320, and the third gear rib 1330 are disposed at intervals, and the third gear rib 1330 is located between the first gear rib 1310 and the second gear rib 1320. The sliding grooves 1200 are formed between the third gear rib 1330 and the first gear rib 1310, and between the third gear rib 1330 and the second gear rib 1320, respectively. That is, the third gear rib 1330 is located between the two slip grooves 1200. The first gear rib 1310 is located on the opposite side of one of the two slip grooves 1200 from the third gear rib 1330 (e.g., the left side of the first slip groove 1210). The second gear rib 1320 is located on the opposite side of the other of the two slip grooves 1200 from the third gear rib 1330 (e.g., the right side of the second slip groove 1220). In the present embodiment, the side surface of each gear rib 1300 partially forms the side wall of the corresponding slip groove 1200.

In some alternative embodiments, the number of gear ribs 1300 may be one, two, or more than three, and the number of sliding grooves 1200 may be one or more than two, without limiting the application. Illustratively, the number of gear ribs 1300 and the number of slip grooves 1200 are one, with the gear rib 1300 being located on one side (e.g., left or right) of the slip grooves 1200. Illustratively, the number of the gear ribs 1300 is two, the number of the sliding grooves 1200 is one, and the two gear ribs 1300 are located on the left and right sides of the sliding grooves 1200, respectively. Illustratively, the number of shift ribs 1300 is greater than three, the number of slip grooves 1200 is two or greater than two, and the slip grooves 1200 are formed between adjacent two shift ribs 1300.

Referring to fig. 5 and 6 in combination, the opening direction of each gear groove 1400 faces away from the headrest body 3100. Specifically, the opening is generally rearward and slightly downward sloping. More specifically, each gear step 1400 has an upper side wall 1410, a lower side wall 1420, and a bottom wall 1430. Bottom wall 1430 is arcuate. The lower sidewall 1420 is disposed obliquely to the bottom wall 1430 and at an obtuse angle to the bottom wall 1430. Specifically, the lower sidewall 1420 is a downwardly sloped ramp. The upper side wall 1410 is curved and smoothly transitions into the bottom wall 1430. A limit projection 1411 is provided on the upper side wall 1410 near the opening of the gear step groove 1400. The limiting protrusion 1411 protrudes downward from the upper sidewall 1410. It should be noted that "the angle between the lower side wall 1420 and the bottom wall 1430 is an obtuse angle" means that the angle between the tangent plane of the bottom wall 1430 at the lowest point in the direction perpendicular to the longitudinal direction and the lower side wall 1420 is an obtuse angle.

Referring to fig. 3 and 4, each gear step groove 1400 is simultaneously formed on a plurality of gear step ribs 1300. In other words, each of the shift grooves 1400 includes a plurality of shift recesses formed on the plurality of shift ribs 1300, respectively, the plurality of shift recesses being disposed at intervals from each other. Specifically, the plurality of shift recesses includes a first shift recess 1400a formed on the first shift rib 1310, a second shift recess 1400b formed on the second shift rib 1320, and a third shift recess 1400c formed on the third shift rib 1330. That is, each of the shift grooves 1400 includes a first shift recess 1400a, a second shift recess 1400b, and a third shift recess 1400c that are disposed at intervals from each other. In the present embodiment, the plurality of gear step recesses are located on the same straight line. In an alternative embodiment, the plurality of gear recesses may not be collinear, which is not a limitation of the present application.

Fig. 8 to 10 schematically show a headrest 3000 according to an embodiment of the present invention. The headrest 3000 includes a headrest body 3100 and a headrest adjustment mechanism 3200. As shown in fig. 3 and 4, the headrest adjusting mechanism 3200 is provided between the headrest body 3100 and the backrest body 1100. It should be noted that, "the headrest adjusting mechanism 3200 is disposed between the headrest body 3100 and the backrest body 1100" should be understood that at least a portion of the headrest adjusting mechanism 3200 is disposed between the headrest body 3100 and the backrest body 1100, and the headrest adjusting mechanism 3200 is connected to the headrest body 3100 and the backrest body 1100, respectively. The headrest adjusting mechanism 3200 includes a slider 3230, a headrest engagement member 3210, a headrest driving member 3260, and a headrest operating member 3220. The headrest body 3100 is slidably coupled to the backrest body 1100 by a slider 3230. The headrest engagement member 3210 is movably coupled to the slider 3230. The headrest operating member 3220 is movably provided to the headrest body 3100 and is connected to the headrest engaging member 3210 through the headrest driving member 3260. The headrest operating member 3220 is operable to move the headrest driving member 3260, thereby driving the headrest engaging member 3210 to move relative to the sliding member 3230 by the headrest driving member 3260 to allow the headrest engaging member 3210 to switch between a headrest locking position and a headrest releasing position. When the headrest engagement member 3210 is located at the headrest locking position (refer to fig. 3 and 4), the headrest engagement member 3210 is adapted to engage with the backrest body 1100 to restrict relative sliding between the slider 3230 and the backrest body 1100, thereby locking the headrest 3000 (i.e., the headrest body 3100) at a corresponding height. When the headrest engagement member 3210 is located at the headrest releasing and locking position, the headrest engagement member 3210 is released from engagement with the backrest body 1100 to allow the slider 3230 to slide with respect to the backrest body 1100, thereby allowing the height adjustment of the headrest portion 3000 (i.e., the headrest body 3100).

The headrest engagement member 3210 includes a headrest engagement rod 3211, and the headrest engagement rod 3211 extends substantially in the left-right direction (i.e., the L-R direction) and is substantially perpendicular to the longitudinal direction of the backrest body 1100. The headrest engagement rod 3211 is substantially circular in cross section. The headrest engagement rod 3211 is adapted to engage with at least one of the plurality of gear grooves 1400 to limit relative sliding between the slider 3230 and the backrest body 1100. The slider 3230 is fixedly provided on the headrest body 3100 and provided with a sliding groove 3234. The extending direction of the sliding groove 3234 is perpendicular to the extending direction of the headrest engagement rod 3211 and is substantially perpendicular to the longitudinal direction of the backrest body 1100, that is, the extending direction of the sliding groove 3234 is substantially perpendicular to the extending direction of the sliding groove 1200. The headrest engagement rod 3211 is provided in the sliding groove 3234 so as to be slidable in the extending direction of the sliding groove 3234. At least a portion of the headrest body 3100 and the headrest engagement lever 3211 are respectively located on opposite sides of the backrest body 1100. The headrest engagement rod 3211 extends at least partially out of the slider 3230 to engage one of the plurality of gear grooves 1400. When the headrest engagement member 3210 is located at the headrest locking position, the headrest engagement rod 3211 engages with one of the plurality of shift grooves 1400. The headrest engagement rod 3211 is adapted to be stopped by the upper sidewall 1410 of the gear step groove, thereby restricting the movement of the headrest engagement rod 3211 in the longitudinal direction of the backrest body 1100, thereby restricting the movement of the slider 3230 in the longitudinal direction of the backrest body 1100, thereby locking the headrest 3000 at a corresponding height. The upper sidewall 1410 is further provided with a limiting protrusion 1411, and the limiting protrusion 1411 is adapted to stop the headrest engagement rod 3211 to prevent the headrest engagement rod 3211 from being accidentally disengaged from the opening of the gear step groove 1400. When the headrest engagement member 3210 is switched to the headrest releasing position, the sliding member 3230 is disengaged from the plurality of gear grooves 1400, and the headrest engagement member 3210 can be moved in the longitudinal direction of the backrest body 1100, so that the sliding member 3230 is moved in the longitudinal direction of the backrest body 1100, thereby allowing the height adjustment of the headrest portion 3000.

Referring to fig. 3 and 4, the portions of the headrest engagement rod 3211 protruding from the slider 3230 are engaged with the first, second, and third gear recesses 1400a, 1400b, 1400c of the corresponding gear groove 1400. Referring to fig. 6 and 7 in combination, each of the gear grooves 1400 has a slope inclined downward, and a stopper tab 1421 for stopping the headrest engagement piece 3210 from sliding off the slope is formed at the end of the slope. Specifically, the lower side wall 1420 of the third-gear concave portion 1400c forms a stopper boss 1421, the stopper boss 1421 having a plane disposed opposite to the upper side wall 1410, the plane of the stopper boss 1421 being substantially parallel to the horizontal plane, that is, the plane of the stopper boss 1421 being substantially parallel to the front-rear direction (i.e., the F-B direction) and the left-right direction (i.e., the L-R direction). A part of the headrest engagement rod 3211 is engaged in the third gear step recess 1400c and is seated on the stopper projection 1421, so that the headrest engagement rod 3211 is prevented from being disengaged from the corresponding gear step recess 1400 along the lower side wall 1420 of the gear step recess 1400.

Referring to fig. 5 and 6, at least a portion of the headrest body 3100 is slidably disposed on the front surface 1110 of the backrest body 1100, and the slider 3230 is slidably disposed on the rear surface 1120 of the backrest body 1100 and is connected with the headrest body 3100 through the sliding groove 1200, so that the headrest body 3100 and the slider 3230 can be synchronously slid with respect to the backrest body 1100 or synchronously restrained at a corresponding height. The headrest body 3100 is provided with a mounting portion 3120. The mounting portion 3120 protrudes rearward from the back surface 3112 of the headrest body, and at least a portion of the mounting portion 3120 protrudes into the sliding groove 1200 and is movable along the sliding groove 1200. Alternatively, the mounting portion 3120 is integrally formed on the headrest body 3100, or is fixedly (i.e., non-detachably) provided on the headrest body 3100 by, for example, bonding or the like, or is detachably provided on the headrest body 3100 by, for example, bolting or the like, which is not limiting to the present application. Referring to fig. 8 and 9 in combination, the slider 3230 is detachably connected to the mounting portion 3120 by bolting, clamping, or the like. The side of the headrest body 3100 facing the back body 1100 is formed as a back surface 3112 of the headrest body, and the side of the headrest body 3100 opposite to the back surface thereof is formed as a front surface 3111 of the headrest body.

Referring to fig. 7 in combination, the back body 1100 is provided with a first engagement portion 1500, and an extending direction of the first engagement portion 1500 is parallel to an extending direction of the sliding groove 1200. The slider 3230 is provided with a second fitting portion 3235. One of the first fitting portion 1500 and the second fitting portion 3235 is a groove, the other of the first fitting portion 1500 and the second fitting portion 3235 is a rib, and the first fitting portion 1500 and the second fitting portion 3235 are concavely and convexly fitted, so that the slider 3230 slides relative to the backrest body 1100 along the extending direction of the first fitting portion 1500. In this embodiment, the first engaging portion 1500 is a groove, and the second engaging portion 3235 is a rib. The back 1120 of the backrest body is provided with at least one group of first matching parts 1500, the number of each group of first matching parts 1500 is at least two, and the left side and the right side of at least one sliding groove 1200 are respectively provided with at least one first matching part 1500. More specifically, the number of the first engaging portions 1500 corresponds to the number of the sliding grooves 1200, and one first engaging portion 1500 is provided on each side of each sliding groove 1200, that is, the number of the engaging portions is equal to two. In the present embodiment, each set of first engaging portions 1500 is located between two adjacent gear ribs 1300. Specifically, one of the two sets of first engaging portions 1500 is located between the first gear rib 1310 and the third gear rib 1330, and the other of the two sets of first engaging portions 1500 is located between the second gear rib 1320 and the third gear rib 1330.

Accordingly, the number of sliders 3230 matches the number of slip grooves 1200. In the present embodiment, the number of the sliding pieces 3230 is two, and the two sliding pieces 3230 are provided corresponding to the first sliding groove 1210 and the second sliding groove 1220, respectively. Each slider 3230 is provided with two second fitting portions 3235. Each second mating portion 3235 engages with a corresponding first mating portion 1500 to slide the slider 3230 along the first mating portion 1500 relative to the back body 1100, thereby enabling the slider 3230 to slide relative to the back body 1100.

For convenience of description, the slider 3230 at the second slip groove 1220 is described as an example.

Referring to fig. 3, 8 and 9 in combination, the sliding member 3230 is slidably engaged with the sliding groove 1200 provided on the back body 1100 and fixedly coupled with the head rest body 3100. The backrest body 1100 is provided with a reinforcing bar 1700 for winding the seat belt, the reinforcing bar 1700 being located above the sliding groove 1200, and the slider 3230 having a housing 3231 at least partially penetrating into the sliding groove 1200. The headrest body 3100 is provided with a seat belt threading opening 3130, the seat belt threading opening 3130 being adapted for the seat belt 300 of the child safety seat 10 to pass through, at least a portion of the housing 3231 being located above the seat belt threading opening 3130. In other words, the upper and lower sides of the slider 3230 are provided with the reinforcing rod 1700 and the webbing through-hole 3130, respectively. The seat belt 300 that is passed out through the belt passing opening 3130 passes around the slider 3230 and is wound around the reinforcing rod 1700. In this embodiment, the seat belt threading 3130 communicates with the sliding groove 1200 to allow the seat belt 300 to extend through the seat belt threading 3130 toward the back surface 1120 of the back body. The seat belt 300 is passed out through the belt passing opening 3130 below the slider 3230, bypasses the slider 3230, and is wound around the reinforcing rod 1700 above the slider 3230. Specifically, the seat belt 300 is threaded through the side of the reinforcement bar 1700 facing the backrest body 1100, and the seat belt 300 is threaded through the side of the reinforcement bar 1700 facing away from the backrest body 1100 after passing upward around the reinforcement bar 1700. That is, the seat belt 300 is wound from the inside of the reinforcing bar 1700 up to the outside of the reinforcing bar 1700.

The line between the reinforcing rod 1700 and the webbing through-hole 3130 passes through the housing 3231 so that the seat belt 300 disposed between the reinforcing rod 1700 and the webbing through-hole 3130 can be pressed against the housing 3231. In this way, the extending direction of the seat belt 300 is changed by the relative positional relationship between the reinforcing rod 1700 and the belt penetration port 3130, so that the seat belt 300 can be partially pressed against the slider 3230, thereby generating pressure on the slider 3230. The pressure can be decomposed into two pressure components, namely, a vertical upward pressure component and a horizontal forward pressure component, and the vertical upward pressure component is transmitted to the headrest clamping rod 3211 through the sliding member 3230, so that the headrest clamping member 3210 can be more stably kept in the gear groove 1400, and further, the situation that the headrest clamping member 3210 is separated from the gear groove 1400 due to jolt and the like to cause "gear jump" is avoided. It should be noted that, the "jump stop" refers to that the headrest engagement member 3210 is accidentally disengaged from the relatively higher gear groove 1400 (i.e., the gear groove 1400 relatively far from the seat portion 2000) and re-engaged to the relatively lower gear groove 1400 (i.e., the gear groove 1400 relatively close to the seat portion 2000) so that the headrest portion 3000 slides from the relatively higher position (i.e., the position relatively far from the seat portion 2000) to the relatively lower position (i.e., the position relatively close to the seat portion 2000).

Referring to fig. 5 to 6, the slider 3230 includes a housing 3231, and the housing 3231 has a rear surface facing away from the backrest body 1100. The rear surface of the housing 3231 is generally parallel to the rear surface 1120 of the backrest body 1100. At least a portion of the reinforcement bar 1700 is located between the extended surface of the housing 3231 and the backrest body 1100 to enable the seat belt 300 to be partially pressed against the slider 3230. I.e., at least a portion of the stiffener 1700 is located in front of the housing 3231. I.e., the forward-most point of the stiffener 1700 is offset from the extended surface of the housing 3231 and is located between the extended surface of the housing 3231 and the backrest body 1100. In this way, when the seat belt 300 passes through the slider 3230 and is wound around the reinforcing rod 1700, the slider 3230 of the seat belt 300 and the reinforcing rod 1700 abut against each other, and the extending direction of the seat belt 300 is offset, so that a part of the seat belt 300 can abut against the slider 3230.

Specifically, the axial center of the reinforcing bar 1700 (i.e., the central axis of the reinforcing bar 1700) is located in front of the extended surface S of the rear surface of the housing 3231. More specifically, the extended surface S of the rear surface of the housing 3231 passes through the reinforcing rod 1700. In other words, the projections of the stiffener 1700 and the slider 3230 on a plane perpendicular to the rear surface of the housing 3231 partially overlap. More specifically, a part of the reinforcing bar 1700 is located on the front side of the extended surface S of the housing 3231, and another part of the reinforcing bar 1700 is located on the rear side of the extended surface of the housing 3231, that is, the reinforcing bar 1700 protrudes rearward from the housing 3231. This allows the seat belt 300 to be pushed against the slider 3230, and allows the seat belt 300 to bypass the reinforcing bar 1700 and then move away from the slider 3230 without interfering with the slider 3230.

Referring to fig. 12 in combination, the lower end of the rear surface of the housing 3231 has a guide surface 3233, and the guide surface 3233 is a slant surface or a convex cylindrical surface. The slider 3230 has an upper side 3232 facing the stiffener 1700. Accordingly, a transition between the housing 3231 and the upper side 3232 (i.e., an upper end of the housing 3231) is provided with a guide surface 3233. A portion of the seat belt 300 is pressed against the guide surface 3233 and is slidable along the guide surface 3233. The guide surface 3233 may reduce friction between the seat belt 300 and the slider 3230, resulting in more effort-saving when pulling the seat belt. Referring to fig. 5 and 6, the reinforcing rod 1700 includes a rod body 1710 and a rotating sleeve 1720 rotatably fitted over the rod body 1710, and the seat belt 300 is adapted to be wound around the rotating sleeve 1720. This allows the seat belt 300 to be pulled more effort-saving.

As can be seen from the above, a slider 3230 which can move along the sliding groove 1200 is provided between the adjacent two gear ribs 1300. That is, a slider 3230 movable along the sliding groove 1200 is provided between the first and third gear ribs 1310 and 1330, and the second and third gear ribs 1320 and 1330, respectively.

Referring to fig. 4 to 6, in an embodiment, the rear surface of the housing 3231 of each slider 3230 protrudes substantially rearward beyond the outer side of its adjacent gear rib 1300. Two sides of the sliding groove 1200 are respectively provided with a protruding part 1600, and a plurality of protruding parts 1600 are respectively positioned above and/or below the gear position groove 1400. The rear surface of each boss 1600 protrudes rearward from the outer side of its adjacent gear rib 1300 and protrudes beyond the rear surface of the housing 3231 of the corresponding slider 3230. Each gear rib 1300 has a first end and a second end located below the first end, respectively, that is, each gear rib 1300 has a second end proximal to seat 2000 and a first end distal from seat 2000, respectively. A plurality of bosses 1600 are provided at the first and/or second ends of the plurality of gear ribs 1300, respectively. Referring to fig. 3 in combination, the plurality of bosses 1600 include, but are not limited to, a first boss 1610 disposed at a first end of the plurality of gear ribs and a second boss 1620 disposed at a second end of the plurality of gear ribs. Specifically, first ends of the first gear rib 1310, the second gear rib 1320, and the third gear rib 1330 are provided with first protrusions 1610, respectively. Second ends of the first and second gear ribs 1310 and 1320 are provided with second bosses 1620, respectively, and second ends of the third gear rib 1330 are not provided with second bosses 1620. In this way, on the one hand, the protruding portion 1600 can serve as a stopper for the headrest engagement rod 3211 to prevent the headrest engagement rod 3211 from coming out of the plurality of shift grooves 1400, and on the other hand, the protruding portion 1600 can serve as a stopper for the seat belt 300 that is lowered down after bypassing the reinforcing rod 1700 to limit the seat belt 300 between the adjacent two shift ribs 1300, thereby avoiding interference of the seat belt 300 with the shift ribs 1300.

Referring to fig. 10 to 11, a headrest operating member 3220 is movably provided to the headrest body 3100. In the present embodiment, the headrest operating member 3220 is movably provided to the headrest body 3100 through the fixing base 3300. The longitudinal direction of the backrest body 3100 is substantially parallel to the longitudinal direction of the backrest body 1100, and the movement direction of the headrest operating member 3220 is substantially perpendicular to the movement direction of the headrest engagement rod 3211.

The headrest operating member 3220 includes an operating portion 3221, a connecting arm 3222, and an operation connecting portion 3223. The operation portion 3221 is connected to the connection arm 3222 through the operation connection portion 3223. The connection arm 3222 is connected to the headrest driving member 3260. In other words, the operation portion 3221, the operation connection portion 3223, the connection arm 3222, and the headrest driver 3260 are connected in order. The number of headrest driving members 3260 corresponds to the number of sliding members 3230. In the present embodiment, the headrest operating member 3220 has two headrest driving members 3260, two connecting arms 3222, one operation connecting portion 3223, and one operation portion 3221, and the two headrest driving members 3260 are in driving connection with the headrest engaging member 3210 and are connected to the operation connecting portion 3223 through the two connecting arms 3222. The operation portion 3221 drives the two headrest driving members 3260 to move through the two connection arms 3222. The headrest operating member 3220 moves substantially in the longitudinal direction of the headrest body 3100, that is, corresponds to the movement of the operating portion 3221 in the longitudinal direction of the headrest body 3100 and drives the two headrest driving members 3260 to move in the longitudinal direction through the operation connecting portion 3223 and the two connecting arms 3222.

As shown in fig. 10 and 11, the operation portion 3221 is movably provided to the front surface 3111 of the headrest body 3100. The operation connection portion 3223 is restrained on the headrest body 3100 by the fixing base 3300, and is movable with the operation portion 3221 with respect to the headrest body 3100, thereby slidably restraining the headrest operation piece 3220 on the headrest body 3100. The operation connecting portion 3223 has a substantially plate shape. The operation connection portion 3223 is disposed parallel to the front surface of the headrest body 3100. The fixing base 3300 is fixed to the headrest body 3100 by, for example, screwing, fastening, or the like, but is not limited thereto. The fixing base 3300 is provided with a limiting portion 3310, and the limiting portion 3310 is detachably connected to the front surface 3111 of the headrest body. Specifically, the limiting portion 3310 has a limiting wall portion 3311, two connecting ears 3312 provided on the limiting wall portion 3311, and a limiting pin 3313 connected to the limiting wall portion 3311. The limiting wall 3311 is detachably connected to the headrest body 3100 through two connecting ears 3312. The stop pins 3313 extend generally downward and are adapted to be removably coupled to the headrest body 3100. In the present embodiment, the operation connection portion 3223 is disposed between the limiting wall portion 3311 and the headrest body 3100 in a penetrating manner, and is connected to the headrest body 3100 through the limiting pin 3313 to be limited between the limiting wall portion 3311 and the headrest body 3100. Specifically, the headrest body 3100 is provided with an fitting portion 3150, the operation connection portion 3223 has a connection opening 3227, and the fitting portion 3150 is exposed from the connection opening 3227 to be connected with the stopper pin 3313. The limit pins 3313 are clamped with the adapting portion 3150 through the connection openings 3227.

The fixing base 3300 is further provided with a base portion 3320, and the base portion 3320 is connected with the limiting wall portion 3311 to form a limiting space 3330. The limiting portion 3310 may be integrally formed with the base portion 3320, or fixedly (i.e., non-detachably) connected to the base portion 3320, or detachably connected to the base portion 3320, which is not limited thereto. The operation portion 3221 is located between the base portion 3320 and the limiting wall portion 3311, and the operation portion 3221 protrudes backward from the operation connection portion 3223, so that the operation portion 3221 is convenient to operate, and the limiting wall portion 3311 can be used for stopping the operation portion 3221 to avoid the operation portion 3221 from passing over the limiting wall portion 3311, so that the operation portion 3221 is limited in the limiting space 3330.

As shown in combination with reference to fig. 9 and 10, the connection arm 3222 extends in the longitudinal direction of the headrest body 3100. The headrest body 3100 is provided with a through channel 3140, the connecting arm 3222 is inserted into the through channel 3140, and at least a portion of the headrest driving member 3260 extends out of the through channel 3140 through the through channel 3140, so that the headrest driving member 3260 can be in driving connection with the headrest engagement rod 3211 located at the back surface 3112 of the headrest body. Wherein the penetrating passage 3140 is provided through the mounting portion 3120.

Referring to fig. 5 and 6, the headrest driving member 3260 is drivingly connected to the headrest engagement rod 3211, thereby driving the headrest engagement rod 3211 to move in the front-rear direction. Specifically, each of the headrest driving members 3260 is provided with a driving groove 3261. The drive groove 3261 forms an acute angle with the movement direction of the headrest operating element 3220, and the drive groove 3261 forms an acute angle with the slide groove 3234, and the headrest engagement lever 3211 is disposed in the slide groove 3234 and the drive groove 3261. In this embodiment, the blocking of the headrest engagement rod 3211 by the groove wall of the driving groove 3261 and the groove wall of the sliding groove 3234 causes the headrest engagement rod 3211 to move along the driving groove 3261 and the sliding groove 3234, thereby driving the headrest engagement rod 3211 to move between the headrest locking position and the headrest unlocking position in the front-rear direction, and further achieving locking or unlocking of the headrest body 3100, so as to adjust the height of the headrest body 3100. At least a portion of the headrest driving member 3260 protrudes into the sliding member 3230 and is provided with a driving groove 3261, and the driving groove 3261 faces a sliding groove 3234 provided on the sliding member 3230. As shown in fig. 8 and 9 in combination, the headrest engagement lever 3211 passes through the slide groove 3234 and the driving groove 3261 and protrudes out of the slide member 3230.

Referring to fig. 5, 6 and 12 in combination, the slider 3230 is provided with a first receiving groove 3236 and a second receiving groove 3238 which communicate with each other. The first receiving groove 3236 communicates with the sliding groove 3234. The opening of the first housing groove 3236 faces the mounting portion 3120, and the first housing groove 3236 faces the penetration passage 3140 (refer to fig. 9). That is, the projection of the first receiving groove 3236 on the headrest body 3100 at least partially overlaps the penetration channel 3140. At least a portion of the headrest driving member 3260 is received in the first receiving groove 3236. This facilitates the insertion of the headrest driving member 3260 into the first receiving groove 3236. One end of the first receiving groove 3236 is an open end, and the other end of the first receiving groove 3236 is formed as a limiting end 3237. Specifically, an end of the first housing groove 3236 near the second housing groove 3238 is formed as a limit end portion 3237. The first receiving groove 3236 extends longitudinally, i.e., the direction of extension of the first receiving groove 3236 is generally parallel to the longitudinal direction of the backrest body 1100. At least a portion of the headrest driving member 3260 is slidably disposed within the first receiving groove 3236 and adapted to be stopped by the stopper end portion 3237 to limit the movement stroke of the headrest driving member 3260 with respect to the sliding member 3230, in other words, the movement stroke of the headrest operating member 3220 with respect to the headrest body 3100.

As shown in fig. 5 and 6, in an embodiment, the headrest adjusting mechanism 3200 further includes a first reset member 3240, the first reset member 3240 is disposed between the sliding member 3230 and the headrest driving member 3260, and the first reset member 3240 is adapted to bias the headrest driving member 3260 to drive the headrest engagement rod 3211 to move toward the headrest locking position. Thus, when the headrest operating member 3220 is not operated, the headrest operating member 3220 is moved to be reset by the elastic restoring force of the first restoring member 3240, and the headrest engaging lever 3211 is driven to move toward the headrest locking position. Specifically, at least a part of the headrest driver 3260 is accommodated in the first accommodation groove 3236 and is provided with an abutment surface 3225, which abutment surface 3225 is planar. The first restoring member 3240 is, for example, a compression spring. One end of the first return element 3240 is accommodated in the second accommodating groove 3238 and abuts against an end of the second accommodating groove 3238, and the other end of the first return element 3240 extends into the first accommodating groove 3236 and abuts against the abutting surface 3225. More specifically, the end of the second accommodation groove 3238 is provided with a first boss 3239, and the first boss 3239 is provided opposite to the abutment face 3225. One end of the first return element 3240 is sleeved on the first boss 3239 and abuts against an end of the second accommodating groove 3238, and the other end of the first return element 3240 abuts against the abutting surface 3225. The first resetting element 3240 is sleeved on the first boss 3239, so that the first resetting element 3240 can be prevented from being deviated.

In the present embodiment, the number of the first reset pieces 3240 is one. The first return member 3240 is disposed in the slider 3230 opposite to the second slip groove 1220. In other embodiments, the number of first return members may be two or more, and each slide member 3230 has a first return member 3240 disposed therein.

As shown in fig. 11, in an embodiment, the headrest adjusting mechanism 3200 further includes a second reset element 3250, where the second reset element 3250 is disposed between the fixed seat 3300 and the operation portion 3221, and the second reset element 3250 is adapted to bias the operation portion 3221 to move and reset the headrest operating element 3220, and drive the headrest engaging element 3210 to switch to the headrest locking position by the headrest driving element 3260 of the headrest operating element 3220. The second return member 3250 is provided between the base portion 3320 and the operation portion 3221. The second restoring member 3250 is, for example, a compression spring. The housing portion 3320 is provided with a receiving groove 3321. The opening of the receiving groove 3321 faces the seat 2000, that is, the opening of the receiving groove 3321 faces substantially downward. While the headrest operating member 3220 is operated, the operating portion 3221 thereof moves into the accommodating groove 3321. Specifically, the second return element 3250 is at least partially accommodated in the accommodating groove 3321, one end of the second return element 3250 abuts against the bottom wall of the accommodating groove 3321, and the other end of the second return element 3250 abuts against the operation portion 3221. More specifically, the bottom wall of the accommodation groove 3321 is provided with a second boss 3340, the operation portion 3221 is provided with an accommodation recess 3226, one end of the second return member 3250 is fitted over the second boss 3340 and abuts against the bottom wall of the accommodation groove 3321, and the other end of the second return member 3250 is accommodated in the accommodation recess 3226 and abuts against the bottom wall of the accommodation recess 3226.

The child safety seat 10 and the headrest 3000 thereof according to the embodiment of the present invention operate as follows.

When the height of the headrest 3000 needs to be adjusted, the operation portion 3221 of the headrest operation member 3220 is pulled upward, and the operation portion 3221 drives the headrest driving member 3260 to slide upward through the operation connection portion 3223 and the two connection arms 3222, respectively. The two headrest driving members 3260 respectively drive the headrest engagement rods 3211 to move backward along the sliding grooves 3234 through driving engagement between the driving grooves 3261 provided thereon and the headrest engagement rods 3211, so that the headrest engagement rods 3211 exit the corresponding gear grooves 1400 (i.e., the headrest engagement rods 3211 move to the headrest releasing and locking positions). At this time, the headrest body 3100 may be moved in the axial direction of the headrest body 1100, and the headrest body 3100 drives the slider and the headrest engagement rod 3211 to move together. When the headrest body 3100 is moved to a desired height position, the headrest engagement rod 3211 faces one of the plurality of gear grooves 1400. At this time, the headrest operating member 3220 is released, the headrest driving member 3260 moves and resets under the elastic restoring force of the first resetting member 3240, and the driving engagement between the driving groove 3261 and the headrest engaging rod 3211 drives the headrest engaging rod 3211 to move forward and engage with the opposite gear groove 1400. At the same time, the operation portion 3221 further moves to reset by the elastic restoring force of the second reset member 3250.

The headrest 3000 and the child safety seat 10 having the same according to the embodiment of the present invention have at least the advantage that the headrest engagement member 3210 is driven to switch between the headrest locking position and the headrest releasing position by the headrest operation member 3220, so that the headrest engagement member 3210 provided on the headrest slider 3230 is selectively engaged with the backrest body 1100, thereby selectively restricting or allowing the relative movement between the headrest slider 3230 and the backrest body 1100, and further achieving the simultaneous restriction or allowing of the relative movement between the headrest body 3100 and the backrest body 1100. This achieves the height adjustment of the headrest 3000 (i.e., the headrest body 3100). The headrest 3000 provided by the embodiment of the invention has a simple structure and is convenient to operate.

Fig. 13, 27 and 35 schematically illustrate a child safety seat 10 according to another embodiment of the invention. The child safety seat 10 may be secured to the vehicle seat by, for example, configuring an ISOFIX link, a pull-up strap, or the like, or may be secured to the vehicle seat by a vehicle configured vehicle seat belt. The child safety seat 10 may include a back rest 4000 and a booster seat cushion 5000 provided in accordance with some embodiments of the invention. The booster seat 5000 may correspond to the seat 2000 described in the above embodiment, that is, the seat 2000 in the above embodiment may be replaced with the booster seat 5000. The booster seat 5000 will be described together with the description of the child safety seat 10.

As shown in fig. 13, 14 and 28, in some embodiments, the booster seat 5000 is removably connected to the backrest 4000. The booster seat 5000 has a first usage mode connected to the backrest 4000 for use with the backrest 4000, and a second usage mode separated from the backrest 4000 for use alone. In the first mode of use, the booster seat 5000 and the backrest 4000 together define a seating space of the child safety seat 10 in which a child is restrained by a seat belt (e.g., the seat belt 300 described in the above embodiments). The first mode of use is suitable for use with children of a smaller age group (e.g., one to four years), and the child safety seat 10 in this mode may be either a forward-facing child seat or a rearward-facing child seat. In the second mode of use, the booster seat cushion 5000 and the backrest of the vehicle seat together define a seating space for the booster seat cushion 5000 in which a child can be restrained by the seat belt of the vehicle seat. The second mode of use is suitable for use by children of older ages (e.g., four to twelve years) and the booster seat 5000 in this mode may be used in a forward direction. Through the heightening seat cushion 5000 that can dismantle the setting for thereby children's safety seat 10 have multiple mode of use and satisfy the user demand of different age bracket children, improved children's safety seat 10's rate of utilization.

Referring to fig. 14, 16 and 22, the booster seat 5000 includes a seat body 5100, and the seat body 5100 includes a first housing 5111 and a second housing 5112. The first housing 5111 and the second housing 5112 are engaged to form a cushion cavity 5113 of the booster cushion 5000. The seat main body 5100 includes an engagement rib 5180, and the engagement rib 5180 may be provided at the rear end of the booster seat 5000 to engage with the backrest body 4100 of the backrest 4000 to define the booster seat 5000 in place.

Referring to fig. 21, 25 and 31, the booster seat 5000 further includes a connecting mechanism 5200 and a retaining mechanism 5300 accommodated in the seat cavity 5113. The connection mechanism 5200 is used to detachably assemble the booster seat cushion 5000 into the child safety seat 10, and the retaining mechanism 5300 allows the detached booster seat cushion 5000 to be switched to the engagement release state for the next use.

Referring to fig. 15 and 20, the backrest 4000 includes a backrest body 4100, and the backrest body 4100 includes backrest restricting ribs 4120, an engaging piece receiving portion 4130, and a holder driving portion 4140, which are located on both sides of the backrest body 4100. The back stop rib 4120 is adjacent the rear end of the back body 4100 for engaging the mating rib 5180 of the booster seat 5000. The engagement member receiving portion 4130 is adapted to receive the engagement member 5210 of the connecting mechanism 5200, and in this embodiment, the engagement member receiving portion 4130 is a backrest engagement hole 4131. The back stop rib 4120, the catch receiving portion 4130, and the holder driving portion 4140 may be located at other positions of the back body 4100. For example, the engaging piece receiving portion 4130 is provided at the front end of the backrest body, or the holder driving portion 4140 is provided at the upper surface of the backrest body.

Referring to fig. 15, 17 and 18, the holder driving part 4140 may protrude from the back body 4100. In particular, the retainer driving portion 4140 may include a driving tab 4141 that may gradually increase in height relative to the back body 4100 along the direction of removal of the booster seat cushion 5000, thereby facilitating removal or assembly of the booster seat cushion 5000 from or into the child safety seat 10. The retainer drive portion 4140 can further include a pocket 4142 recessed inwardly relative to the back body 4100, the drive tab 4141 being located in the pocket 4142 and the drive tab 4141 being capable of abutting the retaining mechanism 5300 when the booster seat cushion is assembled into the child safety seat 10 to drive movement of the retaining mechanism 5300 relative to the seat cushion body 5100.

Referring to fig. 21, 22 and 23, the holding mechanism 5300 includes a holder 5310 connected to the seat cushion body 5100 and a third return 5320 provided between the holder 5310 and the seat cushion body 5100. The holder 5310 includes a driving portion 5311 and a transmission portion 5312 connected to the driving portion 5311. The driving portion 5311 and the transmitting portion 5312 may be integrally formed, or may be separately formed and connected together. The transmission portion 5312 is for latching the connection mechanism 5200, and the driving portion 5311 is for driving the holder 5310 in a direction to hold the lock release position. The first resilient member 5321 is configured to bias the retaining mechanism 5300 in a direction to retain the locked position. The third restoring member 5320 may be fixed to the seat main body 5100 or fixedly connected to the holding member 5310. Alternatively, the third restoring member 5320 may be an elastic piece formed at one end of the holding member 5310, the elastic piece detachably pressing against the seat main body 5100.

The connection mechanism 5200 is provided on the seat cushion body 5100 and includes a catch 5210 and a first operating member 5220 connected to the catch 5210 and movably connected to the seat cushion body 5100. The engagement member 5210 includes an engagement connecting portion 5211 and an engagement pin 5212, which connect the first operating member 5220. The engagement pin 5212 may be integrally formed with the engagement connection 5211 or may be separately formed. The engagement pins 5212 pass through the seat engagement holes 5160 of the seat main body 5100 and engage with the backrest engagement holes 4131 (see fig. 15) of the backrest 4000. In the present embodiment, the engaging member 5210 is in the form of a pin, and in practice, the engaging member 5210 may have other shapes, and the engaging member receiving portion 4130 is in a shape matching the engaging member 5210.

Referring to fig. 15, 25 and 26, the first operating member 5220 can include an operating link 5221 and an operating block 5222. The operation connecting portion 5221 and the operation block 5222 can be integrally formed or separately formed. The operation block 5222 can be engaged with the holder 5310. The operation connection portion 5221 is connected to the engagement connection portion 5211, for example, by rotating or sliding. In the present embodiment, the operation connection portion 5221 includes a driving groove 5221a, and the driving groove 5221a extends a distance in a direction at an angle to the movement direction of the engagement pin 5212 with respect to the backrest engagement hole 4131. The length of the driving groove 5221a in the moving direction of the engagement pin 5212 with respect to the backrest engagement hole 4131 is greater than or equal to the distance by which the engagement pin is retracted from the backrest engagement hole. In another embodiment, for example, the operation connection portion 5221 may be a gear and chain combination (not shown), the chain is connected to the engagement connection portion 5211, and the gear is controlled to rotate by the handle, so that the engagement connection portion 5211 drives the engagement pin 5212 to move along with the chain engaged on the gear, and insert into the backrest engagement hole 4131 on the backrest 2 through the seat cushion engagement hole 5160 of the seat cushion main body 5100, thereby switching the engagement member 5210 between the engagement locking position and the engagement releasing position.

Referring to fig. 25, 26 and 32, the connecting mechanism 5200 can further include a fourth return member 5230 that biases the catch member 5210 toward the catch locking position. As shown, the fourth return member 5230 includes a second resilient member 5231 connected to the seat cushion body 5100. The second elastic member 5231 may be a spring or a leaf spring and is at least partially located in the operation block space 5222e of the operation block 5222, and the operation block space 5222e may be a plate-formed space sandwiching a movement plane of the engagement pin 5212 so as to restrict the swing of the spring in the non-compression direction. One end of the second elastic member 5231 abuts against the second housing 5112, and the other end is fixed to the engaging pin 5212. In fig. 32, the engagement connection portion 5211 may be a rod integrally formed with the engagement pin 5212, and the rod may slide on the drive groove 5221a to switch the engagement member 5210 between the engagement locking position and the engagement releasing position. In another embodiment, the connection mechanism 5200 can not include the fourth return member 5230.

Referring to fig. 20, 23 and 25, the driving portion 5311 of the holder 5310 is pivotably connected to the cushion body 5100 through a first pivot 7100. The first housing 5111 of the seat cushion body 5100 has a guide groove 5150 recessed into the inner space. The guide groove 5150 is provided with an opening 5151. The driving portion 5311 includes a rotation protrusion 5311a pivotally connected to the first pivot 7100. The driving protrusion 4141 may protrude with respect to a side surface of the back body 4100 and may be received in the guide groove 5150 and push against the rotation protrusion 5311a, thereby preventing the booster seat cushion 5000 from sliding out of the back body 4100 under an impact force (e.g., when suddenly braking in a vehicle operation) after the snap-in member 5210 fails (e.g., breaks). The driving part 5311 may be a mesh-shaped rib inclined upward so as to increase friction between the back body 4100 and the seat cushion main body 5100 and prevent the heightened seat cushion 5000 from being smoothed out from the back body 4100 under impact. The transmission portion 5312 may be connected to or integrally formed with the rotation protrusion 5311a. When the booster seat 5000 is detached from the child safety seat 10, the holding mechanism 5300 is in the holding lock position, the rotation boss 5311a protrudes from the opening 5151 to the outside of the seat cavity, and when the booster seat 5000 is mounted on the child safety seat 10, the holding mechanism 5300 is in the holding release position, and the rotation boss 5311a is accommodated in the seat cavity 5113. The rotation projection 5311a may have a slope inclined toward the inlet direction of the guide groove 5150. When the heightened seat cushion 5000 is mounted on the backrest body 4100, the driving projection 4141 presses the inclined surface, and the holding mechanism 5300 is driven to pivot in the holding lock position direction, thereby releasing the engagement with the operation block 5222.

The transmission portion 5312 may include a cross bar 5312a and the third restoring member 5320 may include a first elastic member 5321. As shown, the first elastic member 5321 may be a compression spring, a tension spring, or a spring plate. The first elastic member 5321 is fixed at one end to the first housing 5111 of the seat cushion body 5100 and is disposed between the rail 5312a and the seat cushion body 5100. With the movement of the driving portion 5311 relative to the seat cushion main body 5100, the cross bar 5312a can be switched between pressing against the first elastic member 5321 and pushing away the first elastic member 5321.

The transmission portion 5312 may include an engagement end 5312b, as shown in fig. 25, where the engagement end 5312b engages with a blocking rib 5222a formed on the operating block 5222. The shape of the engaging end 5312b may be changed according to the actual situation, as long as the operating member 322 can be engaged.

As shown in fig. 19, 20 and 23, the seat cushion body 5100 may further include a first stopper rib 5130. The first limiting rib 5130 is disposed at least partially around the first elastic member 5321 in a direction perpendicular to the moving direction of the first elastic member 5321, and a height of the first limiting rib 5130 in the compressing direction of the first elastic member 5321 is not greater than a maximum compression length of the first elastic member 5321.

Referring to fig. 23, 24 and 25, the operation block 5222 is formed with a first limiting hole 5222b extending a certain length in the moving direction of the first operation member 5220. The stopper post 5240 passes through the first stopper hole 5222b and is fixed in the seat body 5100, thereby restricting the movement direction of the operating block 5222. Further, the positioning of the second elastic member 5231 and the stopper post 5240 on the seat body 5100 generally defines the positioning of the first operating member 5220 in the vertical direction. The operation block 5222 may be further formed with an operation recess 5222c, and the seat body 5100 includes a catching opening 5190 exposing the seat cavity 5113 outwardly, the operation recess 5222c being formed in a manner recessed from the outside of the seat body 5100 toward the seat cavity 5113 and at least a portion of the operation recess 5222c being exposed outwardly from the catching opening 5190.

The seat cushion body 5100 includes a second stopper rib 5140, and the second stopper rib 5140 protrudes with respect to the seat cushion body 5100 along the movement direction of the first operating member 5220, so that the first operating member 5220 is abutted by the second stopper rib 5140 without being directly pressed against the seat cushion body 5100 or causing the first operating member 5220 to rotate without losing its function when operated.

The operation block 5222 may be formed with a stopper projection 5222d, and the stopper projection 5222d projects from a surface of the operation block 5222 opposite to the outwardly exposed surface of the operation recess 5222 c. The second stopper rib 5140 has a catching recess 5141 formed at a front end of the first operating member 5220 in a moving direction thereof to be in shape-fit with the stopper projection 5222 d. The limiting projection 5222d is engaged with or disengaged from the engaging recess 5141 as the engaging member 5210 is switched between the engaging locking position and the engaging releasing position.

Referring to fig. 15, 25 and 26, in preparation for removing the raised seat cushion 5000 from the backrest 4000, a hand is placed on the operation recess 5222c, and a force is applied upward to lift the first operating member 5220 up along the driving groove 5221a relative to the engaging member 5210, whereby the engaging member 5210 is contracted from the backrest engaging hole 4131 by the force applied to the engaging member 5210 and biased against the second elastic member 5231, thereby returning the engaging member 5210 to the engaged release state. As the booster seat 5000 is gradually detached from the backrest 4000, the driving projection 4141 moves away from the driving projection 4141, the force exerted on the rail 5312a decreases until it disappears, the first elastic member 5321 pushes away from the rail 5312a by its restoring force, and the engaging end 5312b integrally formed with or fixedly connected to the rail 5312a moves toward the first operating member 5220 under the pushing force and engages in the blocking rib 5222a of the first operating member 5220, thereby holding the first operating member 5220 in the release position, i.e., holding the engaging member 5210 in the engaging release position. When the booster seat 5000 is mounted into the back rest 4000, the fitting rib 5180 abuts against the back rest stopper rib 4120, and the driving projection 4141 in the holder driving portion 4140 abuts against the holder driving portion 4140, so that the driving portion 5311 is rotated about the first pivot 7100 with respect to the seat main body 5100. As the driving portion 5311 rotates, the transmission portion 5312 connected to the driving portion 5311 rotates, the cross bar 5312a rotates and is biased against the first elastic member 5321, and the engagement end 5312b is disengaged from the blocking rib 5222 a. At this time, the restoring force of the spring 3231 pushes the engagement pin 5212 to be inserted into the backrest engagement hole 4131 from the seat cushion engagement hole 5160, thereby allowing the engagement member 5210 to be switched to the engagement locking position.

In the present embodiment, the holding mechanism 5300 changes the engagement state between the holding mechanism 5300 and the connecting mechanism 5200 by the restoring force of the first elastic member 5321, and in practice, the switching of the connection state between the holding mechanism 5300 and the connecting mechanism 5200 can be realized by other forces. For example, the driving portion 5311 may be provided with a weight that can slide along a slide on the seat cushion main body 5100, and the weight may be rotatably connected to the transmission portion 5312, and when the raised seat cushion 5000 and the backrest 4000 are assembled together, the weight is blocked by the backrest body 4100 and slides upward, so that the transmission portion 5312 connected to the weight is deflected, and the retainer 5310 is disengaged from the operation piece 322. When the booster seat 5000 is detached from the backrest 4000, the weight is separated from the backrest body 4100, and slides down the slide by gravity, so that the transmission portion 5312 connected to the weight is deflected, and the holder 5310 is engaged with the operating element 322 again.

Further, in the present embodiment, the holding mechanism 5300 is rotated with respect to the seat cushion main body 5100 by rotating about the first pivot 7100, and in essence, the holding mechanism 5300 can slide with respect to the seat cushion main body 5100. Further, in the present embodiment, the state of the holding mechanism 5300 is changed by the movement of the spring in the longitudinal direction thereof with respect to the seat cushion main body 5100, and substantially, the state of the holding mechanism 5300 can also be changed by the biasing force of the spring. For example, uniform horizontal grooves may be provided on both sides of the seat main body 5100 where the first elastic member 5321 is provided, the transmission portion 5312 is interposed between the first operating member 5220 and the first elastic member 5321, and one end of the first elastic member 5321 is provided on the seat main body 5100. The driving portion 5311 and the transmission portion 5312 of the holder 5310 can synchronously slide on the groove, the transmission portion 5312 can include an inclined surface, and a blocking portion capable of blocking the driving portion 5311 is provided on the back body 4100. When the booster seat 5000 and the backrest 4000 are assembled together from the horizontal direction, the driving portion 5311 is slid by the blocking portion of the backrest body 4100, so that the transmission portion 5312 with the driving portion 5311 moves toward the first elastic member 5321 and presses the inclined surface thereof against the first elastic member 5321, whereby the holding member 5310 and the first operating member 5220 can be released from engagement. When the driving portion 5311 is detached from the blocking portion of the backrest body 4100, the restoring force of the first elastic member 5321 pushes the driving portion 5312 to move toward the first operating member 5220 and is engaged with the first operating member 5220.

Referring to fig. 16, 33 and 35, the seat cushion body 5100 may further include an armrest portion 5170. The armrest portions 5170 are provided on both sides of the seat cushion body 5100 and extend upward from the upper surface 5121 of the seat cushion body 5100 at an angle to the upper surface 5121, and form a first pocket 5171 adapted for passing a vehicle seat belt. The armrest portion 5170 may further include a storage recess 5172 formed by a portion of the seat body 5100 outside of the seat cavity 5113 and having a receiving space. The storage recess 5172 includes a storage connection hole 5172a recessed from the storage recess 5172 toward the upper surface 5121 of the seat cushion main body 5100 and a connection groove 5172b on the side of the storage recess 5172.

As shown in fig. 33, 34 and 35, the booster seat 5000 also includes at least one cup 5400. The storage cup 5400 includes a connecting post 5410 protruding from the bottom of the storage cup 5400 and a cup connecting boss 5420 protruding at the side of the storage cup 5400. The connection column 5410 is inserted into the container connection hole 5172a, and the cup connection protrusion 5420 is engaged with the connection groove 5172b.

Referring to fig. 17, 26 and 28, the child safety seat 10 may further include a base 200, a headrest 3000, and an angle adjustment mechanism 6000. In the present embodiment, the child safety seat 10 includes an angle adjustment mechanism 6000, by which the angle of the backrest 4000 relative to the base 200 can be adjusted. In other embodiments, the backrest 4000 may not include the angle-adjusting mechanism 6000 and/or the child safety seat 10 may not include the base 200, as the application is not limited. In addition, the booster seat 5000 may be assembled directly with the base 200 alone for use by older children. In this case, the base 200 may be provided with a base engaging portion (not shown) to engage with the engaging piece 5210 of the booster seat 5000 and a base driving portion to drive the movement of the driving portion 5311 of the booster seat 5000 relative to the seat main body 5100, and the base engaging portion and the base driving portion are provided identically to the engaging piece receiving portion 4130 and the holder driving portion 4140 of the backrest main body 4100, so that a description thereof will not be repeated.

Referring to fig. 29, 30 and 32, the base 200 may include a base body 210, an engagement portion 230, and a pivoting portion 240. The base 200 may be integrally formed. The base upper case 201 and the base lower case 202 may be engaged with each other. The lower surface 1b may be a flat surface in order to mount the booster seat 5000 or the child safety seat 10 to a vehicle seat. The pivot portion 240 and the engagement portion 230 extend upwardly at an angle relative to the base upper surface 211 of the base body 210. The engagement portion 230 is engaged with the angle adjusting mechanism 6000. The pivoting portion 240 is rotatably connected to the backrest body 4100 of the backrest 4000 through a second pivot 7200. In the embodiment shown in fig. 30, the pivot 240 is triangular. The pivot portion 240 is pivoted to the backrest body 4100 at a substantially apex position of the triangle. In other embodiments, the pivoting portion 240 may be any other shape suitable for pivoting with the backrest body 4100.

Referring to fig. 28, 29 and 38, the angle adjusting mechanism 6000 is movably connected to the base 200 and movably connected to the backrest body 4100, so as to adjust the angle of the backrest body 4100 relative to the base 200, thereby meeting the comfort requirements of the user and increasing the usage rate of the child safety seat.

Specifically, the angle adjustment mechanism 6000 includes a fifth reset element 6100 and a second operation element 6200. The fifth restoring member 6100 may include a third elastic member 6110, and the third elastic member 6110 may be a spring. One end of the third elastic member 6110 abuts against the bottom of the back body 4100 and is movable relative to the back body 4100, and the other end abuts against the second operation member 6200.

The second operation member 6200 includes a rotation portion 6210 and a sliding portion 6220. The rotating portion 6210 is generally funnel-shaped, at least partially housing the third resilient member 6110 and rotatably connected to the back body 4100 by a third pivot 7300. The sliding portion 6220 may be integrally formed with the rotating portion 6210 or connected to the rotating portion 6210. One end of the sliding portion 6220 is slidable with respect to the base 200.

Referring to fig. 30 and 38, the base 200 includes a gear portion 220 protruding from a base upper surface 211 of the base body 210. The middle of the top of the gear part 220 is concaved downward to form a circular arc-shaped concave stage 223, and the engaging parts 230 are formed at both sides of the concave stage 223. At least one, for example, two, three or more angular shift grooves 221 are provided at both sides of the shift portion 220 along the height direction in which the shift portion 220 protrudes with respect to the base 200, respectively. The angular range groove 221 is formed from an angle of the range part 220 obliquely upward.

The sliding portion 6220 is generally inverted U-shaped, including feet 6221 on either side that mate with the gear portion 220. Gear pin 7400 passes through feet 6221 on both sides and snaps over the angular gear slot 221. When a force is applied to the second operating member 6200, the second operating member 6200 rotates relative to the backrest body 4100, thereby bringing the shift pin 7400 out of engagement with the angular shift groove 221 and into engagement with the other angular shift groove 221. The gear part 220 further includes angle gear ribs 222 formed at both sides of the gear part 220 to extend in a height direction protruding with respect to the base 200. The angular shift rib 222 at least partially surrounds the angular shift groove 221 in a movement direction along the shift pin 7400, thereby stopping the shift pin 7400 in the angular shift groove 221. Referring to fig. 15, 22 and 32, the backrest 4000 includes a reinforcing pipe 4300. The reinforcement pipe 4300 is fixedly installed in the backrest body 4100 and extends from a backrest upper portion 4111 (a portion against which the back of the child is abutted) to a backrest lower portion 4112 (a portion accommodating buttocks) of the backrest body 4100. The reinforcement pipe 4300 includes a first reinforcement hole 4310 at a position opposite to the backrest engagement hole 4131, and the engagement member 5210 can be inserted into the first reinforcement hole 4310 through the backrest engagement hole 4131. The reinforcement tube 4300 may further include a second reinforcement hole 4320 at a relative position of the second pivot 7200, and the second pivot 7200 is inserted into the second reinforcement hole 4320 through the connection hole 4150 at the backrest body 4100.

Referring to fig. 35, 36 and 37, the backrest body 4100 of the backrest 4000 includes a storage recess 4160 above the upper surface 5121 of the seat cushion body 5100, the storage recess 4160 being adapted to store items. The storage recess 4160 is formed by recessing the back rest body 4100 to the opposite side of the side surrounded by the back rest 4000 and the raised seat cushion 5000 (the side where the seating space is located). The backrest portion includes a cover 4200, the cover 4200 being rotatably inserted into the storage connection slot 4162 of the storage recess 4160 and closing the storage recess 4160 by a cover connection rod 4240. The cover 4200 may be of various shapes, such as a flat shape.

The cover 4200 is formed with resilient fingers 4210 and a window 4220. The elastic finger 4210 protrudes from one end of the cover 4200 and is bent, and may be U-shaped or L-shaped, for example. A resilient finger 4210 protrudes from the window 4220 towards a face of the storage recess 4160 when the cover 4200 is closed, said resilient finger 4210 comprising a positioning step 4211 protruding on a surface of said resilient finger 4210 near the free end. The storage recess 4160 includes a positioning rib 4161 protruding from the back body 4100 toward the storage space formed in the storage recess 4160. The positioning step 4211 may be snapped onto the positioning rib 4161, thereby closing the storage recess 4160.

The cover 4200 may further have a hand-holding portion 4230 formed below the elastic finger 4210, and the hand-holding portion 4230 is formed by the cover 4200 being recessed toward the storage recess 4160 when closed. The hand-held portion 4230 is adapted to receive a hand portion to apply a force to the resilient finger 4210 to disengage the detent step 4211 from the detent rib 4161, thereby opening the cover 4200.

When the booster seat 5000 is assembled directly with the base 200 alone, an angle adjusting mechanism 6000 may also be provided, in which case the angle adjusting mechanism 6000 is pivotally connected to the lower surface 5122 (shown in fig. 18 and 24) of the seat main body 5100.

According to the child safety seat 10 and the booster seat 5000 thereof of the above-described embodiments, the booster seat 5000 is detachably connected to the backrest 4000 by the connecting mechanism 5200, and the engaging piece 5210 is held in the lock release position when the booster seat 5000 is detached from the child safety seat 10 by the holding mechanism 5300, so that the booster seat 5000 is easy to install. In addition, the angle adjuster 5400 can allow the angle adjustment of the child safety seat 10, thereby being capable of satisfying the comfort requirements of the user using the child safety seat 10 and increasing the use rate of the child safety seat 10. In addition, the connecting mechanism 5200 is simple in structure and easy to operate, and can quickly detach and mount the heightened seat cushion 5000.

The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The foregoing examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.

Claims

1. A child safety seat, comprising:

A safety belt;

A backrest body formed with a plurality of gear grooves and a rod for winding the seat belt, and

A headrest portion movably provided on the backrest body, the headrest portion including a headrest body and a headrest adjustment mechanism;

Wherein, headrest adjustment mechanism includes:

a slider connected to the headrest body and provided with a housing and a sliding groove, and

A headrest engaging member penetrating the sliding groove and movable between a headrest locking position and a headrest unlocking position, the headrest engaging member engaging with one of the plurality of shift grooves when the headrest engaging member is located at the headrest locking position, and the sliding member being disengaged from the plurality of shift grooves when the headrest engaging member is switched to the headrest unlocking position,

The headrest body is provided with a safety belt threading opening, at least one part of the shell is positioned above the safety belt threading opening, and a connecting line between the rod and the safety belt threading opening penetrates through the shell so that the safety belt arranged between the rod and the safety belt threading opening can be propped against the shell.

2. The child safety seat according to claim 1, wherein the extended face of the rear surface of the housing passes through the lever such that the webbing on the front side of the lever is pressed against the slider and the webbing on the rear side of the lever is spaced from the slider.

3. The child safety seat according to claim 1, wherein a lower end of the rear surface of the housing has a guide surface for guiding the seat belt, the guide surface being a slope or a convex cylindrical surface.

4. A child safety seat according to any one of claims 1 to 3, wherein:

The backrest body is provided with a sliding groove, the sliding groove extends longitudinally along the backrest body and penetrates through the surface of the backrest body, the sliding piece is matched with the sliding groove in a sliding fit mode, at least one part of the shell penetrates through the sliding groove, and the rod is located above the sliding groove.

5. The child safety seat according to claim 4, wherein the backrest body is provided with a first mating portion, an extending direction of the first mating portion is parallel to an extending direction of the sliding groove, the slider is provided with a second mating portion, wherein one of the first mating portion and the second mating portion is a groove, the other of the first mating portion and the second mating portion is a rib, and the first mating portion and the second mating portion are mated with each other in a concave-convex manner.

6. A child safety seat according to any one of claims 1 to 3, wherein the backrest body is provided with a plurality of gear ribs, each of the gear grooves being formed simultaneously in the plurality of gear ribs, the plurality of gear grooves opening in a direction away from the headrest body, each of the gear grooves having a downwardly inclined surface, the end of the inclined surface being formed with a stopper protrusion for stopping the headrest engagement member from sliding off the inclined surface.

7. A child safety seat according to any one of claims 1-3, wherein the lever comprises a lever body and a swivel sleeve rotatably sleeved over the lever body, the harness being adapted to be wound over the swivel sleeve.

8. A child safety seat according to any one of claims 1-3, wherein the slider has a first receiving pocket in communication with the slider, one end of the first receiving pocket being an open end, the other end of the first receiving pocket being formed as a limit end, at least a portion of the headrest drive being slidably disposed within the first receiving pocket and adapted to be blocked by the limit end.

9. A child safety seat according to any one of claims 1-3, wherein the headrest adjustment mechanism further comprises a headrest drive member movably connected to the headrest portion and drivingly connected to the headrest engagement member;

The headrest clamping piece comprises a headrest clamping rod which at least partially extends out of the sliding piece;

The headrest driving piece is provided with a driving groove, and an included angle between the extending direction of the sliding groove and the extending direction of the driving groove is an acute angle;

the headrest clamping rod penetrates through the sliding groove and the driving groove and can slide along the extending direction of the sliding groove and the driving groove.

10. The child safety seat according to claim 9, wherein the headrest adjustment mechanism further comprises a reset member disposed between the slide member and the headrest drive member, the reset member being adapted to bias the headrest drive member to drive the headrest engagement lever toward the headrest locking position,

The slider is provided with first holding groove and the second holding groove of mutual intercommunication, at least a portion of headrest driving piece hold in first holding inslot and be provided with the butt face, reset one end hold in the second holding groove and with the tip butt in second holding groove, reset the other end stretch into first holding groove and with butt face butt.