CN106515521B - Seat recliner with auxiliary locking structure - Google Patents

Abstract

The invention belongs to the technical field of seat angle adjusters, and relates to a seat angle adjuster with an auxiliary locking structure, which comprises a gear ring, a guide plate, a cam, a locking block and a main control panel, wherein one side of the locking block is provided with the auxiliary locking block for transversely supporting the locking block, the upper end of the head part of the auxiliary locking block is provided with an inclined supporting surface, the side surface of the locking block opposite to the auxiliary locking block is provided with a supporting recess, and the upper end of the supporting recess is provided with a collision inclined surface for colliding with the inclined supporting surface; the upper end face of the auxiliary locking block is provided with a third bulge, the main control panel is provided with a second guide hole, the third bulge is arranged in the second guide hole in a sliding mode, the main control panel rotates to drive the auxiliary locking block to be inserted into or separated from the supporting recess of the locking block through the third bulge, and therefore the locking stability and safety of the locking block and the gear ring are good, and the accuracy stability and safety of the angle adjuster are good.

Description

Seat recliner with auxiliary locking structure

technical field

The invention belongs to the technical field of automobile seats, in particular to a seat angle adjuster with an auxiliary locking structure.

Background technique

Traditional recliners include a ring gear, guides, cams, and locking devices. The ring gear has accommodating recesses on its inner surface, and inner gear teeth are formed at edge portions of the accommodating recesses. The guide plate is connected to the inner surface of the ring gear, and a plurality of guide blocks (guide blocks) protrude from the inner surface of the guide plate. The two opposing guide blocks define the locking device guide recess. The cam is placed between the guide plate and the ring gear, and the cam is sleeved with a joystick rotating shaft in its center. External gear teeth are formed on the outer peripheral surface of each locking device.

In the conventional recliner having the above structure, when the lever rotating shaft rotates in the clockwise direction, both ends of the cam rotating along the lever rotating shaft push the locking device to move radially toward the outside of the guide plate. Accordingly, the locking device moves along the corresponding guide recesses, so that the outer gear teeth of the locking device mesh with the inner gear teeth of the ring gear, thereby entering a locked state.

However, in the conventional recliner, due to the structural characteristic that each locking device slides along the corresponding locking device guiding recess, a gap for ensuring the movement of the locking device is formed between the two side walls of the locking device and the corresponding locking device. Between the inner surfaces of the guide blocks, the guide blocks define locking device guide recesses between the guide blocks. In addition, due to the repeated sliding of the locking device along the locking device guide recess, friction between the two side walls of the locking device and the inner surface of the guide block causes friction between the two side walls of the locking device and the inner surface of the guide block. wear on the surface. Therefore, as the number of times of use of the recliner increases, the gap between the locking device and the guide block gradually increases, resulting in unnecessary movement of the seat back around the rotation axis, coupled with the manufacturing tolerance of the recliner, resulting in The decrease of the locking strength of the recliner is easy to cause safety accidents.

In addition, when an external force acts on the recliner, the force exerted on each locking device due to the external force is concentrated on the side wall of one of the guide blocks on both sides of the locking device, thereby making the guide blocks easily deformed. Once the guide block is deformed, the gap between the locking device and the guide block increases. The locking device cannot fully engage with the ring gear, and it is easy to disengage from the locking when the car collides or brakes in an emergency, causing an accident.

Chinese invention patent CN 102292238 A discloses a "recliner for vehicle seat", which includes a ring gear, a guide plate, a joystick rotating shaft, a cam, an elastic member, a main control panel, a locking device and a Locking device support. The ring gear has internal gear teeth. The guide plate is combined with the ring gear and has a guide block on the guide plate. A joystick rotation shaft is inserted through the guide plate and the ring gear. The cam has support protrusions on both ends thereof. elastic pieces are fixed to diametrically opposite portions of the inner surface of the guide plate, and the first end of each of the elastic pieces is elastically supported on the first end of the corresponding support protrusion of the cam; the main control A disc is sleeved on the joystick rotating shaft and is engaged with the power transmission projection of the cam, and the main control disc has an outer guide hole and an inner guide hole, the outer guide hole being formed diametrically The inner guide hole is formed so as to pass through the main control plate at the opposite portion in the diametrical direction which is closer to the central portion of the main control plate than the outer guide hole. ; Pairs of locking devices, each of which is slidably disposed between two opposite said guide blocks of said guide plate, each said locking device having a supporting recess on its inner surface, said supporting The depression has a concave curved surface and a convex curved surface, the concave curved surface is inclined outward from the lower end of the first surface of the locking device to the middle portion of the locking device, the convex curved surface is from the second end of the concave curved surface to the The middle portion of the second surface of the locking device is inclined inward, the outer surface of each locking device is formed with external gear teeth, and the central portion of the rear surface of each locking device is provided with a connecting protrusion, the connecting the protrusions are inserted into the corresponding outer guide holes of the main control panel; and a pair of locking device supports are provided between the cam and the pair of locking devices, each of which is The locking device support has a first contact surface and a second contact surface, the first contact surface is in close contact with the concave curved surface of the supporting recess of the corresponding locking device, and the second contact surface is provided with In order to be in close contact with the lower portion of the first surface of the guide block abutting the second end of the locking device, both ends of the inner surface of the locking device support are supported by the outer peripheral surface of the cam.

In the above solution, when the recliner of the vehicle seat is in the locked state, both ends of the locking device are maintained in the state supported by the outer peripheral surface of the cam. Therefore, the above solution can prevent gaps from being formed between the locking device and the locking device support and between the locking device and the inner surface of the guide block provided to adjoin both ends of the locking device support. Therefore, when the recliner is in the locked state, unnecessary movement of the seat back around the rotation axis can be prevented, thereby enhancing the reliability of the product.

However, the support in the above scheme is supported at the bottom of the locking device, and the inner surface of the support is supported by the cam, so the mechanism is more complicated, and the superposition error of manufacturing tolerances and errors caused by wear increases, which also causes the locking device and the ring gear to be unable to fully mesh. It is easy to disengage the lock when the car collides or brakes in an emergency, causing an accident and causing the lock.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a seat recliner with an auxiliary locking structure. The auxiliary lock block is arranged on the side of the locking device, and the lock block is laterally supported. The structure is simpler and the safety performance of the recliner is effectively improved.

The object of the present invention is achieved in this way:

Seat recliner with auxiliary locking mechanism, including

Ring gear: The inner surface of the ring gear has an accommodating depression, and the edge of the accommodating depression forms an internal gear;

Guide plate: combined with the inner surface of the ring gear, the inner surface of the guide plate is provided with a plurality of guide blocks spaced apart from each other at a predetermined interval, and a radial slideway is formed between two adjacent guide blocks;

Cam: located in the middle of the guide plate, the middle of the cam is provided with a shaft hole, the upper end surface is provided with a first protrusion for connection, and the outer surface is provided with a power transmission protrusion;

Lock block: slidingly arranged on the radial slide of the guide plate, the inner surface of the lock block is supported by the cam, the outer surface of the lock block is formed with an external gear, the upper surface of the lock block is provided with a second protrusion for connection, and the radial movement of the lock block can be adjusted. Engage or disengage the external gear on the lock block with the internal gear on the ring gear;

Main control panel: the main control panel and the cam are sleeved on the same joystick rotating shaft, the first protrusion on the cam is slidably arranged in the positioning hole on the main control panel, and the rotation of the main control panel drives the lock through the second protrusion radial movement of the block;

One side of the lock block is provided with an auxiliary lock block that laterally supports the lock block, the upper end of the head of the auxiliary lock block is provided with an inclined support surface, and the side of the lock block opposite to the auxiliary lock block is provided with a support recess, and the upper end of the support recess is provided. There is a resistance inclined surface that interferes with the inclined support surface; the upper end surface of the auxiliary lock block is provided with a third protrusion, the main control disk is provided with a first guide hole, and the third protrusion is slidably arranged in the first guide hole, and the main control disk is provided with a first guide hole. The rotation of the auxiliary lock block drives the auxiliary lock block into or out of the support recess of the lock block through the third protrusion.

Preferably, the first guide hole includes two unequal diameter outer arc segments and inner arc segments, and between the outer arc segments and the inner arc segments is provided with a connection connecting the outer arc segments and the inner arc segments Transition.

Preferably, a lateral slide for the auxiliary lock block is formed between two adjacent guide blocks on the guide plate, and the auxiliary lock block is slidably arranged on the lateral slide.

Preferably, the head of the auxiliary lock block is located at the lower part of the side wall of the lock block.

Preferably, an elastic member is arranged between the main control plate and the auxiliary lock block to tighten the auxiliary lock block and the main control plate in the locked position.

Preferably, the elastic member is a U-shaped torsion spring, both ends of the torsion spring are provided with right-angle bends that are bent to the same side, one right-angle bend is fixed on the cam through the main control panel, and the other right-angle bend The torsion spring is bent through the through hole or the inner recess of the auxiliary lock block, and the torsion spring has the function of simultaneously rotating the main control disk until the outer gear of the lock block meshes with the inner gear of the ring gear and the auxiliary lock block is pressed against the lock block. force.

Preferably, the inner concave portion of the auxiliary lock block is provided on the side wall of the auxiliary lock block near the center of the circle, and the inner concave portion is a U-shaped groove.

Preferably, a lateral slide of the auxiliary lock block is formed between two adjacent guide blocks on the guide plate, and a U-shaped groove is provided on the side wall of the guide block on the concave side of the auxiliary lock block. The length of the U-shaped groove is the same as that of the auxiliary lock block. The lateral movement distance of the block is matched.

Preferably, two of the elastic members and the auxiliary lock blocks are provided axially symmetrically, and there are two axially symmetrical first guide holes on the main control panel, so as to facilitate the connection with the two elastic members and the two auxiliary lock blocks. The third protrusions on it cooperate with each other.

Compared with the prior art, the present invention has the following advantages:

1. The auxiliary lock block of the present invention is laterally abutted on the side wall of the lock block from the side, and the lock block is pressed against the side wall of the guide block and the internal gear through the support inclined plane of the head, so as to improve the locking strength;

2. When the lock block of the present invention is impacted by the ring gear, since the side wall of the lock block is supported by the auxiliary lock block, lateral swing and radial movement of the locking device are avoided;

3. In the present invention, after the lock block is locked with the ring gear, the elastic piece provides elastic force for the auxiliary lock block to lock the lock block. The force acts, and the circumferential component force is perpendicular to the axis of the lock block. The lock block is pressed against the side wall of the guide block on one side of the radial slideway, which avoids the lateral or circumferential shaking of the lock block causing the lock block to be unstable. The problem is that the radial component force always pushes the lock block in a state where the outer gear of the lock block and the inner gear of the ring gear are closely meshed, even when the car collides or brakes in an emergency, the outer gear of the lock block and the inner gear of the ring gear It will not disengage from the lock, which ensures the stability and reliability of the recliner.

Description of drawings

Figure 1 is an exploded schematic diagram of the present invention.

Figure 2 is an internal assembly view of the present invention.

FIG. 3 is a cross-sectional view of the present invention.

Fig. 4 is a partial enlarged view of the joint of the guide block, the lock block and the auxiliary lock block of the present invention.

FIG. 5 is a perspective view of the auxiliary lock block of the present invention.

Detailed ways

The present invention is further described below with specific embodiment, referring to Fig. 1-Fig. 5:

Seat recliner with auxiliary locking mechanism, including

Ring gear 2: The inner surface of the ring gear 2 has a accommodating depression, and the edge of the accommodating depression forms an internal gear 21;

Guide plate 8: connected to the inner surface of the ring gear 2 through the compression ring 1, the inner surface of the guide plate 8 is provided with a plurality of guide blocks 81 spaced apart from each other at a predetermined interval, and a radial slide 83 is formed between two adjacent guide blocks 81;

Cam 7: located in the middle of the guide plate 8, the middle of the cam 7 is provided with a shaft hole 71, the upper end surface is provided with a first protrusion 72 for connection, and the outer surface is provided with a power transmission protrusion 73;

Lock block 5: slidably arranged on the radial slideway 83 of the guide plate 8, the inner surface of the lock block 5 is supported by the cam 7, the outer surface of the lock block 5 is formed with an external gear 53, and the upper surface of the lock block 5 is provided with a second connection convex 52, the radial movement of the lock block 5 can make the external gear 53 on the lock block 5 engage or disengage the internal gear 21 on the ring gear 2;

Main control panel 4: The main control panel 4 and the cam 7 are sleeved on the same joystick rotating shaft, and the first protrusion 72 on the cam 7 is slidably arranged in the positioning hole 43 on the main control panel 4. The rotation drives the radial movement of the lock block 5 through the second protrusion 52;

One side of the lock block 5 is provided with an auxiliary lock block 6 that laterally supports the lock block 5, the upper end of the head of the auxiliary lock block 6 is provided with an oblique support surface 63, and the side of the lock block 5 opposite to the auxiliary lock block 6 is provided. There is a support recess 54, and the upper end of the support recess 54 is provided with a resistance inclined surface 55 that interferes with the inclined support surface 63; the upper end surface of the auxiliary lock block 6 is provided with a third protrusion 61, the main control panel 4 is provided with a first guide hole 41, The three protrusions 61 are slidably arranged in the first guide hole 41 , and the rotation of the main control panel 4 drives the auxiliary lock block 6 to insert or disengage from the support recess 54 of the lock block 5 through the third protrusion 61 .

As an additional technical feature of the present invention, the first guide hole 41 includes two sections of an outer arc section 411 and an inner arc section 413 with unequal diameters, and a connection is provided between the outer arc section 411 and the inner arc section 413 The transition section 412 of the outer arc section 411 and the inner arc section 413 forms a first guide hole 41 in which the outer arc section 411, the transition section 412, and the inner arc section 412 communicate with each other and have a smooth transition.

As an additional technical feature of the present invention, a lateral slideway 82 of the auxiliary lock block 6 is formed between two adjacent guide blocks 81 on the guide plate 8, and the lateral slideway 82 refers to the radial slideway 83 as a longitudinal slideway When running, the slideway arranged laterally relative to the longitudinal slideway is called the lateral slideway 82, the auxiliary lock block 6 is slidably arranged on the lateral slideway 82, and the sliding direction of the auxiliary lock block 6 and the sliding direction of the lock block 5 are 90 degrees. The included angle is between 100° and 100°. Of course, the included angle can also be adjusted to be larger or smaller. Preferably, the included angle is greater than 90°, so that the main control panel 4 is easy to release the auxiliary lock block 6 from the lock block 5. When locked, the guide blocks 81 that make up the transverse slideway 82 can share the guide block 81 with the guide blocks 81 that make up the radial slideway 83, that is, on the side of the same side of the two guide blocks 81 that make up the transverse slideway 82 The walls simultaneously act as side walls of the radial slides 83 .

As an additional technical feature of the present invention, the head of the auxiliary lock block 6 is located at the support recess 54 at the lower part of the side wall of the lock block 5 , and the support recess 54 is provided with a cutaway part in the lower part of the side wall of the lock block 5 . , when the auxiliary lock block 6 locks the lock block 5, the auxiliary lock block 6 is located in the missing corner of the lock block 5; of course, if the auxiliary lock block 6 is arranged radially outward, the support recess 54 of the lock block 5 can also be set as a concave so that when the auxiliary lock block 6 locks the lock block 5 , the head of the auxiliary lock block 6 is located in the groove of the lock block 5 .

As an additional technical feature of the present invention, an elastic member 3 is arranged between the main control panel 4 and the auxiliary lock block 6 to tighten the auxiliary lock block 6 and the main control panel 4 in the locked position.

As an additional technical feature of the present invention, the elastic member 3 is a U-shaped torsion spring. Both ends of the torsion spring are provided with right-angle bends 31 that are bent to the same side. One right-angle bend 31 passes through the main control panel. 4 is fixed on the cam 7, another right-angle bend 31 is passed through the through hole or the inner recess 62 of the auxiliary lock block 6, and the torsion spring has the external gear 53 and the ring gear that simultaneously rotate the main control disk 4 to the lock block 5. 2 and the locking force of the auxiliary lock block 6 against the lock block 5; of course, the elastic member 3 can also be replaced by a tension spring. When a tension spring is used, one end of the tension spring is positioned on the auxiliary lock block. 6 and the other end are positioned on the lock block 5 or on the main control panel 4, a similar purpose can also be achieved, but in this case, the installation structure will be more complicated.

As an additional technical feature of the present invention, the inner recess 62 of the auxiliary lock block 6 is disposed on the side wall of the auxiliary lock block 6 near the center of the circle, and the inner recess 62 is a U-shaped groove.

As an additional technical feature of the present invention, a lateral slide 82 of the auxiliary lock block 6 is formed between two adjacent guide blocks 81 on the guide plate 8 . The U-shaped groove 811, the length of the U-shaped groove 811 is matched with the lateral movement distance of the auxiliary lock block 6, the U-shaped groove 811 is provided on the guide block 81 so that a part of the right-angle bending 31 of the torsion spring is located at the position of the auxiliary lock block 6 On the outside, the depth of the inner recess 62 of the auxiliary lock block 6 is reduced, so that the strength of the auxiliary lock block 6 is higher.

As an additional technical feature of the present invention, two elastic members 3 and auxiliary lock blocks 6 are provided axially symmetrically, and two first guide holes 41 on the main control panel 4 are axially symmetrically provided, so as to facilitate connection with the two The elastic members 3 and the third protrusions 61 on the two auxiliary locking blocks 6 cooperate to act.

The elastic member 3 of the present invention can provide a continuous elastic force F when the auxiliary lock block 6 locks the lock block 5. At this time, the elastic member is elastically supported on the inner recess 62 of the lower side wall of the auxiliary lock block 6; the elastic member 3 is on the cam When turning in the unlocking direction, follow the inner recess of the auxiliary lock block 6 to slide on the U-shaped groove of the guide block. The lock block 5 slides radially inward under the action of the positioning hole of the main control panel 4, so that the outer gear 53 of the lock block 5 is disengaged from the inner gear 21 of the ring gear 2; when the elastic member 3 rotates in the locking direction of the cam 7 , under the combined action of the first guide hole of the main control panel 4 and the restoring force of the elastic member 3, the auxiliary lock block 6 is driven to slide on the lateral slide rail 82, so that the external gear 53 of the lock block 5 and the internal gear 21 of the ring gear 2 Engagement, due to the elastic force F of the elastic member 3, when the auxiliary lock block 6 is pressed against the lock block 5, a circumferential component force F1 and a radially outward component force F2 act, and the circumferential component force F1 is perpendicular to the axis of the lock block. , the lock block 5 is pressed against the side wall of the guide block on the side of the radial slideway 83 to avoid the problem of unstable locking of the lock block 5 caused by the lateral or circumferential shaking of the lock block 5. The radial force component F2 Always press the lock block 5 tightly in the state where the external gear 53 of the lock block 5 and the internal gear 21 of the ring gear 2 are closely meshed. The internal gear 21 will not be disengaged from the lock, which ensures the stability and reliability of the work of the recliner.

The above-mentioned embodiments are only preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore: all equivalent changes made according to the structure, shape and principle of the present invention shall be covered by the protection of the present invention. within the range.

Claims (9)

1. Seat recliner with auxiliary locking structure, including Ring gear: The inner surface of the ring gear has an accommodating depression, and the edge of the accommodating depression forms an internal gear; Guide plate: combined with the inner surface of the ring gear, the inner surface of the guide plate is provided with a plurality of guide blocks spaced apart from each other at a predetermined interval, and a radial slideway is formed between two adjacent guide blocks; Cam: located in the middle of the guide plate, the middle of the cam is provided with a shaft hole, the upper end surface is provided with a first protrusion for connection, and the outer surface is provided with a power transmission protrusion; Lock block: slidingly arranged on the radial slide of the guide plate, the inner surface of the lock block is supported by the cam, the outer surface of the lock block is formed with an external gear, the upper surface of the lock block is provided with a second protrusion for connection, and the radial movement of the lock block can be adjusted. Engage or disengage the external gear on the lock block with the internal gear on the ring gear; Main control panel: the main control panel and the cam are sleeved on the same joystick rotating shaft, the first protrusion on the cam is slidably arranged in the positioning hole on the main control panel, and the rotation of the main control panel drives the lock through the second protrusion radial movement of the block; It is characterized by: One side of the lock block is provided with an auxiliary lock block that laterally supports the lock block, the upper end of the head of the auxiliary lock block is provided with an inclined support surface, and the side of the lock block opposite to the auxiliary lock block is provided with a support recess, and the upper end of the support recess is provided. There is a resistance inclined surface that interferes with the inclined support surface; the upper end surface of the auxiliary lock block is provided with a third protrusion, the main control disk is provided with a first guide hole, and the third protrusion is slidably arranged in the first guide hole, and the main control disk is provided with a first guide hole. The rotation of the auxiliary lock block drives the auxiliary lock block into or out of the support recess of the lock block through the third protrusion. 2 . The seat recliner with auxiliary locking structure according to claim 1 , wherein the first guide hole comprises two unequal diameter outer arc segments and inner arc segments, the outer arc A transition section connecting the outer arc section and the inner arc section is arranged between the shape section and the inner arc section. 3 . The seat recliner with an auxiliary locking structure according to claim 1 , wherein a lateral slide of the auxiliary lock block is formed between two adjacent guide blocks on the guide plate, and the auxiliary lock block is slidably arranged. 4 . on the lateral slide. 4 . The seat recliner with an auxiliary locking structure according to claim 1 , wherein the head of the auxiliary locking block is located at the lower part of the side wall of the locking block. 5 . 5. The seat recliner with an auxiliary locking structure according to any one of claims 1 to 4, wherein a connection between the auxiliary lock block and the main control block is arranged between the main control panel and the auxiliary lock block. The disc tensions the elastic in the locked position. 6 . The seat recliner with an auxiliary locking structure according to claim 5 , wherein the elastic member is a U-shaped torsion spring, and both ends of the torsion spring are provided with bending to the same side. 7 . One right-angle bend is fixed on the cam through the main control plate, and the other right-angle bend is passed through the through hole or the inner recess of the auxiliary lock block. The torsion spring has the function of rotating the main control plate to the lock block at the same time. The external gear meshes with the internal gear of the ring gear and the locking force of the auxiliary lock block against the lock block. 7 . The seat recliner with an auxiliary locking structure according to claim 5 , wherein the inner recess of the auxiliary lock block is arranged on the side wall of the auxiliary lock block near the center of the circle, and the The inner recess is a U-shaped groove. 8 . The seat recliner with an auxiliary locking structure according to claim 5 , wherein a lateral slide of the auxiliary lock block is formed between two adjacent guide blocks on the guide plate, and the inner recess of the auxiliary lock block is formed. 9 . A U-shaped groove is arranged on the side wall of the side guide block, and the length of the U-shaped groove is matched with the lateral movement distance of the auxiliary lock block. 9 . The seat recliner with an auxiliary locking structure according to claim 5 , wherein two of the elastic members and the auxiliary locking blocks are arranged axisymmetrically, and the first guide on the main control panel Two holes are arranged symmetrically about the axis, so as to cooperate with the two elastic pieces and the third protrusions on the two auxiliary lock blocks.