TWM665659U - Adjusting chair - Google Patents

Abstract

The present disclosure provides an adjusting chair including a seat, a back frame, a backrest sliding mechanism, a backrest linkage mechanism and a driving mechanism. The back frame includes a first rail and a second rail. The first rail has a first guiding direction parallel to a length direction of the back frame. The second rail is arranged with the first rail at an interval and has a second guiding direction parallel to the length direction. The back sliding mechanism includes a sliding element and a backrest assembly. The sliding element is movably disposed at the first rail. The backrest assembly is connected to the sliding element. The backrest linkage mechanism is connected to the backrest assembly and is guided by the second track. As the driving mechanism rotates the back frame relative to the seat, the backrest linkage mechanism drives the sliding element to move in the first rail, and the backrest is moved relative to the back frame. Therefore, using comfort of the adjusting chair is increased.

Description

Adjustable chair

The invention relates to an adjustable chair, in particular to an adjustable chair with a tiltable back.

A chair generally includes a seat and a backrest, and the backrest can be used for the back of the human body to support. In order to improve the comfort of use, most chairs have a backrest adjustment function, which can make the backrest pivot relative to the seat, so that the back of the human body can be tilted relative to each other.

Generally, when adjusting the chair back, users will first straighten their upper body and then adjust the chair back. However, for some elderly people or users who are physically disabled, their upper body must be supported on the chair back, so when adjusting the angle, the back will be pulled, causing discomfort.

In view of this, how to improve the structure of chairs to enhance comfort has become the goal pursued by relevant industries.

The invention provides an adjustable chair, which can improve the comfort of use through structural configuration.

According to an embodiment of the present invention, an adjustable chair is provided, comprising a seat, a back support, a backrest sliding mechanism, a backrest connecting rod mechanism and a driving mechanism. The back support is pivoted on the seat and comprises a first track and a second track. The first track has a first guiding direction parallel to a length direction of the back support. The second track is arranged with an interval with the first track and has a second guiding direction, and the second guiding direction is parallel to the length direction. The backrest sliding mechanism comprises a sliding element and a backrest assembly. The sliding element is movably arranged on the first track. The backrest assembly is connected to the sliding element. The backrest connecting rod mechanism is connected to the backrest assembly and guided by the second track. The driving mechanism is connected to the back support. The driving mechanism drives the back support to rotate relative to the seat, and the backrest connecting rod mechanism moves along the second track and links the sliding element to move in the first track, so that the backrest assembly moves relative to the back support.

According to the adjustment chair of the above-mentioned embodiment, the first track may include a track frame and an inner pad, and the inner pad is arranged in the track frame. The sliding element has a rod-shaped structure to match the inner pad.

In the adjustable chair according to the aforementioned embodiment, the track frame may include at least one positioning groove, the inner pad includes at least one positioning rib, and the at least one positioning rib protrudes into the at least one positioning groove.

In the adjustable chair according to the aforementioned embodiment, the track frame may have a metal body, and the inner pad may have a groove-shaped plastic body.

According to the above-mentioned embodiment of the adjustment chair, the driving mechanism may include a fixed plate, a push rod and an actuator. One end of the fixed plate is connected to the back support. The push rod is connected to the other end of the fixed plate, and the actuator is connected to and drives the push rod.

According to the adjustment chair of the above-mentioned embodiment, the backrest connecting rod mechanism may include a connecting rod, a swing rod, a first sliding rod, a sliding seat and a second sliding rod. The connecting rod is pivoted to the backrest assembly. One end of the swing rod is pivoted to the back support and the other end is pivoted to the connecting rod, and the swing rod includes at least two pivot holes. An upper end of the first sliding rod is pivoted to any one of the at least two pivot holes, and a lower end of the first sliding rod is limited by the second track. The sliding seat is slidably arranged on the second track and pivoted to the first sliding rod. One end of the second sliding rod is pivoted to the sliding seat and the other end is pivoted to the seat.

According to another embodiment of the present invention, an adjustable chair is provided, comprising a seat, a back support, a backrest sliding mechanism, a backrest connecting rod mechanism and a driving mechanism. The back support is pivoted on the seat and comprises a first track, the first track has a first guiding direction parallel to a length direction of the back support, and the first track comprises a track frame and an inner pad. The inner pad is arranged in the track frame and forms a guiding space. The backrest sliding mechanism comprises a sliding element and a backrest assembly, the sliding element is movably accommodated in the guiding space, and the sliding element has a rod-shaped structure to match the guiding space. The backrest assembly is connected to the sliding element. The backrest connecting rod mechanism is connected to the backrest assembly. The driving mechanism is connected to the back support. The driving mechanism drives the back support to rotate relative to the seat, and the backrest connecting rod mechanism links the sliding element to move in the first track, so that the backrest assembly moves relative to the back support.

In the adjustable chair according to the aforementioned embodiment, the track frame may include at least one positioning groove, the inner pad includes at least one positioning rib, and the at least one positioning rib protrudes into the at least one positioning groove.

In the adjustable chair according to the above-mentioned embodiment, the track frame may have a metal body, and the inner pad may have a groove-shaped plastic body.

According to the above-mentioned embodiment of the adjustment chair, the driving mechanism may include a fixed plate, a push rod and an actuator. One end of the fixed plate is connected to the back support. The push rod is connected to the other end of the fixed plate. The actuator is connected to and drives the push rod.

The following will describe the embodiments of the present invention with reference to the drawings. For the sake of clarity, many practical details will be described together in the following description. However, the reader should understand that these practical details should not be used to limit the present invention. That is to say, in some embodiments of the present invention, these practical details are not necessary. In addition, in order to simplify the drawings, some commonly known structures and components will be shown in the drawings in a simple schematic manner; and repeated components may be represented by the same number or similar number.

In addition, the terms "first", "second", "third", etc. in this article are only used to describe different elements or components, and do not limit the elements/components themselves. Therefore, the first element/component can also be renamed as the second element/component. Moreover, the combination of elements/components/mechanisms/modules in this article is not a generally known, conventional or familiar combination in this field. Whether the elements/components/mechanisms/modules themselves are known cannot be used to determine whether their combination relationship is easy to be completed by ordinary knowledge in the technical field.

Please refer to Figures 1 and 2, wherein Figure 1 is a three-dimensional schematic diagram of an adjustable chair 100 according to an embodiment of the present invention, and Figure 2 is a partial exploded schematic diagram of the adjustable chair 100 of the embodiment of Figure 1. The adjustable chair 100 includes a seat 1500, a back support 1100, a backrest sliding mechanism 1200, a backrest connecting rod mechanism 1300 and a driving mechanism 1600. The back support 1100 is pivoted on the seat 1500 and includes a first track 1110. The first track 1110 has a first guiding direction parallel to a length direction of the back support 1100. The backrest sliding mechanism 1200 includes a sliding element 1210 and a backrest assembly 1220. The sliding element 1210 is movably disposed on the first track 1110. The backrest assembly 1220 is connected to the sliding element 1210. The backrest connecting rod mechanism 1300 is connected to the backrest assembly 1220. The driving mechanism 1600 drives the back support 1100 to rotate relative to the seat 1500, and the backrest connecting rod mechanism 1300 links the sliding element 1210 to move in the first track 1110, so that the backrest assembly 1220 moves relative to the back support 1100.

Thus, through the configuration of the back support 1100, the back sliding mechanism 1200, the back connecting rod mechanism 1300 and the driving mechanism 1600, the back support assembly 1220 can slide relative to the back support 1100 when the back support 1100 pivots without affecting the user, thereby improving the comfort of use.

The adjustable chair 100 of the present invention may have a wheelchair structure, and thus may further include a base frame and at least three wheels, the seat 1500 is disposed on the base frame, and the number of wheels may be, for example, four and disposed on the base frame. For the sake of simplicity, the base frame and wheels are omitted in the present invention, but the present invention is not limited thereto. In other embodiments, the adjustable chair may also be a general chair and include chair legs, but is not limited thereto.

Please refer to FIG. 3 and FIG. 4, and refer to FIG. 2 together, wherein FIG. 3 is a partially enlarged schematic diagram of the adjustable chair 100 of the embodiment of FIG. 1, and FIG. 4 is a partially cross-sectional schematic diagram of the adjustable chair 100 along the cutting plane line 4-4 of the embodiment of FIG. 1. In the embodiment of FIG. 1 to FIG. 4, the number of the first rails 1110 is two, and the two first rails 1110 are symmetrically arranged. Each first rail 1110 includes a rail frame 1111 and an inner pad 1112. The inner pad 1112 is disposed in the rail frame 1111 and forms a guide space, and the rail frame 1111 may have a metal body, and the inner pad 1112 may have a groove-shaped plastic body.

Specifically, the back support 1100 may further include a setting plate 1120 and a locking plate 1130. The setting plate 1120 is for the backrest connecting rod mechanism 1300 to be set thereon, the locking plate 1130 is located above the setting plate 1120, and the two track frames 1111 are respectively located on the two sides of the setting plate 1120. Each track frame 1111 is divided into a front half and a rear half by the setting plate 1120. Each front half forms a long groove on one side of the setting plate 1120 to accommodate each inner pad 1112 therein, and each front half forms a locking groove on one side away from the setting plate 1120. The two rear halves can form an assembly space with the setting plate 1120, and other components can be assembled in the assembly space.

The track frame 1111 is made of metal and may have a metal body, and the inner pad 1112 may be locked to the lock plate 1130, which is made of plastic and may have a groove-shaped plastic body and is placed in the long groove, and can cooperate with the track frame 1111, and produce wear-resistant and self-lubricating effects through the heterogeneous configuration. The track frame 1111 may include at least one positioning groove 1111a, and the inner pad 1112 includes at least one positioning rib 1112a, and the at least one positioning rib 1112a protrudes into the at least one positioning groove 1111a. As shown in FIG. 3 , the number of the positioning grooves 1111a can be three, and each positioning groove 1111a extends in the length direction, and the number of the positioning ribs 1112a can also be three to match the number of the positioning grooves 1111a, so that the inner pad 1112 can be stably combined with the track frame 1111. It should be particularly noted that the track frame in this case refers to a structure that forms a long groove and is used to accommodate the inner pad, which may be independently manufactured as a track frame and then connected to other components through other fixing methods, or may include other extension parts and be used together as a side plate or a front plate, and is not limited to the above disclosure.

The back support 1100 may further include two second rails 1140 , which are disposed on the setting plate 1120 and arranged symmetrically. Each second rail 1140 may be located at the lower half of the setting plate 1120 , and each second rail 1140 includes a guide groove, the two guide grooves are opposite to each other, and the second rail 1140 can be used to limit the first sliding rod 1330 .

The number of sliding elements 1210 of the backrest sliding mechanism 1200 is two, each sliding element 1210 is movably accommodated in the guide space of each inner pad 1112, and each sliding element 1210 has a rod-shaped structure to match the guide space, so as to slide stably and reduce abnormal noise. Specifically, as shown in Figures 2 and 3, each sliding element 1210 includes a locking portion 1211 and a sliding portion 1212, the locking portion 1211 and the sliding portion 1212 are connected to form an L shape, the sliding portion 1212 protrudes into the guide space, and the locking portion 1211 can be locked to the backrest assembly 1220. The backrest assembly 1220 can be supported by the user and can support the user's back.

Please refer to FIG. 5 and FIG. 6, and refer to FIG. 2 together, wherein FIG. 5 is a front view schematic diagram of the sliding element 1210, the backrest sliding mechanism 1200 and the back support 1100 of the adjustable chair 100 of the embodiment of FIG. 1, and FIG. 6 is another front view schematic diagram of the sliding element 1210, the backrest sliding mechanism 1200 and the back support 1100 of the adjustable chair 100 of the embodiment of FIG. 1. As shown in FIG. 2, FIG. 5 and FIG. 6, the backrest connecting rod mechanism 1300 may include a connecting rod 1310, a swing rod 1320 and a first sliding rod 1330. The connecting rod 1310 is pivoted to the backrest assembly 1220. One end of the swing bar 1320 is pivoted to the back frame 1100 and the other end is pivoted to the connecting rod 1310. The swing bar 1320 includes at least two pivot holes 1321. An upper end of the first sliding bar 1330 is pivoted to any one of the at least two pivot holes 1321. The driving mechanism 1600 is connected to the back frame 1100.

Specifically, the left end of the swing rod 1320 is pivoted to the setting plate 1120 and can pivot relative to the setting plate 1120; the right end of the swing rod 1320 can be connected to the upper end of the connecting rod 1310, and the lower end of the connecting rod 1310 is pivoted to the back plate of the backrest assembly 1220, so that the connecting rod 1310 can pivot relative to the swing rod 1320 and the back plate at the same time. The number of the at least two pivot holes 1321 of the swing rod 1320 is three, and the pivot holes 1321 are arranged between the two ends of the swing rod 1320. The upper end of the first slide bar 1330 may be pivoted to the leftmost pivot hole 1321, and the lower end of the first slide bar 1330 may be limited by the second rails 1140. When the first slide bar 1330 moves along the second rails 1140, it may drive the swing bar 1320 to swing and link the connecting rod 1310, thereby driving the backrest assembly 1220 to slide. The upper end of the first slide bar 1330 may be pivoted to different pivot holes 1321, so as to adjust the range of movement of the backrest assembly 1220 relative to the back support 1100. In other embodiments, the swing rod and the connecting rod can be an integrated structure, and one end of the connecting rod is pivoted on the backrest assembly and connected to a slide block. The back support can further include a third track located on the setting plate, and the slide block slides in a limited position on the third track.

The backrest linkage mechanism 1300 may further include a slide 1340 and a second slide 1350. The slide 1340 is slidably disposed on the second rail 1140 and pivotally connected to the first slide 1330. One end of the second slide 1350 is pivotally connected to the slide 1340 and the other end is pivotally connected to the seat 1500. The slide 1340 may include a seat body (not shown) and four pulleys (not shown), wherein two pulleys are located on one side of the seat body and accommodated in one of the second rails 1140, and the other two pulleys are located on the other side of the seat body and accommodated in the other second rail 1140. When the slide 1340 moves in the second rail 1140, the first slide 1330 may be linked. In other embodiments, the back-supporting connecting rod mechanism may be a combination of any connecting rods, and the back support may include a rail and a connecting rod, but may not include a rail, and is not limited to the above disclosure.

As shown in FIG. 2 , the driving mechanism 1600 may include a fixed plate 1610, a push rod 1620, and an actuator 1630. One end of the fixed plate 1610 is connected to the back support 1100. The push rod 1620 is connected to the other end of the fixed plate 1610, and the actuator 1630 is connected to and drives the push rod 1620. Specifically, the actuator 1630 may be an electric cylinder, which may include a telescopic rod 1631. The fixing plate 1610 may include a hinge 1611. When the upper end of the fixing plate 1610 is locked to the outward locking groove of the track frame 1111, the lower end will protrude from the track frame 1111. The hinge 1611 may protrude from the inner side of the lower end and be used to be hinged to the seat 1500. The upper end of the push rod 1620 may be fixed to the outer side of the lower end, and the lower end of the push rod 1620 may be hinged to the telescopic rod 1631.

Therefore, as shown in FIG. 5 and FIG. 6 , when the telescopic rod 1631 of the actuator 1630 is retracted, the push rod 1620 and the fixing plate 1610 can be driven to pivot the back support 1100. At this time, since the second slide bar 1350 is pivoted to the seat 1500, the slide 1340 is limited by the second slide bar 1350 and moves in the second track 1140, driving the first slide bar 1330 to move downward, and the swing bar 1320 rotates with the left end as the pivot point, driving the connecting rod 1310 to move the backrest assembly 1220, so that the sliding element 1210 can slide in the first track 1110.

Although the present invention has been disclosed as above by way of embodiments, it is not intended to limit the present invention. Anyone skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the scope defined in the attached patent application.

100: Adjustable chair 1100: Back support 1110: First track 1111: Track frame 1111a: Positioning groove 1112: Inner pad 1112a: Positioning rib 1120: Setting plate 1130: Locking plate 1140: Second track 1200: Backrest sliding mechanism 1210: Sliding element 1211: Locking part 1212: Sliding part 1220: Backrest assembly 1300: Backrest connecting rod mechanism 1310: Connecting rod 1320: Swing rod 1321: Pivot hole 1330: First slide rod 1340: Sliding seat 1350: Second slide bar 1500: Seat 1600: Driving mechanism 1610: Fixed plate 1611: Hub 1620: Push rod 1630: Actuator 1631: Telescopic rod

FIG. 1 is a three-dimensional schematic diagram of an adjustable chair according to an embodiment of the present invention; FIG. 2 is a partially exploded schematic diagram of the adjustable chair of the embodiment of FIG. 1; FIG. 3 is a partially enlarged schematic diagram of the adjustable chair of the embodiment of FIG. 1; FIG. 4 is a partial cross-sectional schematic diagram of the adjustable chair of the embodiment of FIG. 1 along the cutting plane line 4-4; FIG. 5 is a front view schematic diagram of a sliding element, a backrest sliding mechanism and a back support of the adjustable chair of the embodiment of FIG. 1; and FIG. 6 is another front view schematic diagram of the sliding element, the backrest sliding mechanism and the back support of the adjustable chair of the embodiment of FIG. 1.

100: Adjustable chair

1100: Back support

1200: Back-to-sliding mechanism

1500: Chair seat

1600: Driving mechanism

Claims (10)

An adjustable chair, comprising: a seat; a back support pivotally mounted on the seat and comprising: a first track having a first guide direction parallel to a length direction of the back support; and a second track spaced apart from the first track and having a second guide direction parallel to the length direction; a backrest sliding mechanism, comprising: a sliding element movably disposed on the first track; and a backrest assembly connected to the sliding element; a backrest connecting rod mechanism connected to the backrest assembly and guided by the second track; and a driving mechanism connected to the back support; The driving mechanism drives the back support to rotate relative to the seat, and the backrest connecting rod mechanism moves along the second track and links the sliding element to move in the first track, so that the backrest assembly moves relative to the back support. The adjustable chair as described in claim 1, wherein the first track comprises: a track frame; and an inner pad disposed in the track frame; wherein the sliding element has a rod-shaped structure to match the inner pad. An adjustable chair as described in claim 2, wherein the track frame includes at least one positioning groove, the inner pad includes at least one positioning rib, and the at least one positioning rib protrudes into the at least one positioning groove. An adjustable chair as described in claim 3, wherein the track frame has a metal body and the inner pad has a groove-shaped plastic body. The adjustable chair as described in claim 1, wherein the driving mechanism comprises: a fixing plate, one end of which is connected to the back support; a push rod, which is connected to the other end of the fixing plate, and an actuator, which is connected to and drives the push rod. The adjustable chair as described in claim 1, wherein the backrest connecting rod mechanism comprises: a connecting rod pivoted to the backrest assembly; a swing rod, one end of which is pivoted to the back support and the other end is pivoted to the connecting rod, and the swing rod comprises at least two pivot holes; a first slide rod, an upper end of which is pivoted to any one of the at least two pivot holes, and a lower end of which is limited by the second track; a slide seat, which is slidably arranged on the second track and pivoted to the first slide rod; and a second slide rod, one end of which is pivoted to the slide seat and the other end is pivoted to the seat. An adjustable chair, comprising: a seat; a back support pivotally mounted on the seat and comprising a first track, the first track having a first guide direction parallel to a length direction of the back support, and the first track comprising: a track frame; and an inner pad disposed in the track frame and forming a guide space; a backrest sliding mechanism, comprising: a sliding element movably accommodated in the guide space, and the sliding element having a rod-like structure to match the guide space; and a backrest assembly connected to the sliding element; a backrest connecting rod mechanism connected to the backrest assembly; and a driving mechanism connected to the back support; The driving mechanism drives the back support to rotate relative to the seat, and the backrest connecting rod mechanism drives the sliding element to move in the first track, so that the backrest assembly moves relative to the back support. An adjustable chair as described in claim 7, wherein the track frame includes at least one positioning groove, the inner pad includes at least one positioning rib, and the at least one positioning rib protrudes into the at least one positioning groove. An adjustable chair as described in claim 8, wherein the track frame has a metal body and the inner pad has a groove-shaped plastic body. The adjustable chair as described in claim 7, wherein the driving mechanism comprises: a fixing plate, one end of which is connected to the back support; a push rod, which is connected to the other end of the fixing plate; and an actuator, which is connected to and drives the push rod.

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