TWI808904B - Seat back linkage device for chair - Google Patents

Abstract

The invention relates to a seat back linkage device for a chair. Primarily, a seat body is pivotally connected to a seat chassis, and a seat cushion assembly plate is disposed above the seat body and the seat chassis. Furthermore, the seat cushion assembly plate is pivotally connected to the seat body. In this way, when a user sits on a seat cushion provided on the seat cushion assembly plate, the seat cushion assembly plate is pivotally connected with the seat body as a fulcrum. When a front side of the seat cushion assembly plate is displaced downward, the front side of the seat cushion assembly plate can be slowly lowered to a required forward inclination angle by using seat cushion spring pieces connected to a rear side of the seat cushion assembly plate. When a user lies on a chair back on a rear side of the seat body, the seat body is pivotally connected with the seat chassis as a fulcrum, so that the rear side of the seat body is displaced rearward. Furthermore, the seat body and the seat cushion assembly plate are pivotally connected to form a top support to support the seat cushion assembly plate, so as to make the chair back linked with the seat to tilt synchronously, thereby improving the comfort of sitting.

Description

Seat-back linkage device for chairs

The invention relates to the technical field of chairs, in particular to a seat-back linkage device of a chair.

Press, general office chairs and other chairs are usually designed with a reclining adjustment function on the back of the chair. When the user sits on the chair and lies on the back of the chair, the back of the chair can elastically swing to achieve an elastic cushioning effect.

Therefore, some people in the industry have developed a chair that can make the seat and the back of the chair move. Please refer to the previous patents such as "Seat Pan and Seat Back Linkage Mechanism" in Taiwan Announcement No. M599751 and "A Chair that Can Tilt Back and Back" in China Announcement No. CN215271602U. The linkage mechanism of the seat and the back of the existing chair is too complex in structural design, has many parts, relatively high manufacturing cost and takes up a lot of space, which affects the overall aesthetics of the chair.

The reason is that the present inventor, in view of the above-mentioned deficiencies in the manufacture and implementation of the existing chairs that can make the seat and the back of the chair interlock, has developed the present invention through many ingenuity with the assistance of his many years of manufacturing and design experience and knowledge in related fields.

The present invention relates to a seat-back linkage device of a chair, and its main purpose is to provide a seat-back linkage device of a chair with a simple structure, low manufacturing cost, and a flat design that enables the chair back to move synchronously with the seat.

In order to achieve the above-mentioned purpose of implementation, the inventor is to develop the seat-back interlocking device of the following chairs, which includes:

A seat body is provided with a chassis assembly at the front side of the seat body, and a seat back assembly at the back of the seat body, and the seat body is provided with a spring sheet assembly vertical groove between the chassis assembly and the seat back assembly, and the rear groove wall of the spring sheet assembly vertical groove is adjacent to the seat back assembly;

A seat chassis, the seat chassis is set at the chassis assembly vertical part of the seat main body, and at least one first pivot is passed through and pivoted with the chassis assembly vertical part, and the front side of the seat chassis is assembled with the rear end of a support spring, and the front end of the support spring extends to the front of the seat chassis, and at least one seat back spring is arranged in the vertical groove of the seat body, and the front end of the seat back spring is connected to the seat chassis The rear side is assembled, and a buckle part is provided at the rear side groove wall of the vertical groove of the shrapnel group relative to the seat back shrapnel, so that the rear end of the chair back shrapnel and the buckle part set on the rear side groove wall of the vertical groove of the shrapnel group are correspondingly locked and positioned;

For a cushion assembly vertical plate, the seat cushion assembly vertical plate is located above the seat body and the seat chassis, and is pivotally connected with the seat body by at least one second pivot, and the pivot joint between the seat cushion assembly vertical plate and the seat body is located in front of the pivot joint between the seat body and the seat chassis, and the front end of the support spring of the seat chassis is in contact with the front side of the seat cushion assembly vertical plate.

The above-mentioned seat back linkage device for chairs, wherein, at least a seat cushion spring and a tip rod are further arranged in the spring assembly vertical groove of the seat main body, so that the front end of the seat cushion spring is assembled at the rear side of the seat chassis, and a through hole is provided at the rear end of the seat cushion spring, and the tip rod is passed through the through hole of the seat cushion spring, and a stopper is provided at the bottom of the tip rod for contact with the bottom surface of the seat cushion spring. The upper end of the tip rod is assembled at the rear side of the seat cushion group vertical plate, and a connecting plate is provided between the front side of the seat cushion group vertical plate and the front end of the supporting elastic piece of the seat chassis, and the upper and lower ends of the connecting plate are pivotally connected with the seat cushion group vertical plate and the supporting elastic piece respectively.

The above-mentioned seat-back linkage device for chairs, wherein, the connecting plate is inclined from the upper rear to the lower front, so that an angle is formed between the connecting plate and the upright plate of the seat cushion assembly.

The seat-back linkage device of the chair as mentioned above, wherein, the angle between the connecting plate and the seat cushion assembly vertical plate is 6 degrees.

In the above-mentioned seat-back linkage device of a chair, a groove is provided on the bottom surface of the front side of the upright plate of the seat cushion assembly, so that the connecting plate can be correspondingly accommodated in the groove.

The seat-back interlocking device of the above-mentioned chair, wherein, the support elastic piece is thrown upward gradually from the rear end to the front end in a curved arc shape.

The above-mentioned seat back linkage device for chairs, wherein, the seat cushion assembly vertical plate is formed with a pivot ear on the left and right sides of the bottom surface, and the seat main body is respectively provided with a pivot portion at the opposite position on the left and right sides, so as to pass through and pivot with the two side pivot ears of the seat cushion assembly vertical plate respectively through a second pivot.

The above-mentioned seat back linkage device of the chair, wherein, the seat main system is provided with a sound-absorbing sheet at the bottom of the vertical groove of the elastic sheet assembly, which is located below the seat back elastic sheet.

As described above, the back of the chair's back is connected. Among them, the back of the chair's back connection device further contains a chair back control unit. The back control unit of the chair contains a tenon, which is set in the shot of the mortise of the main body of the chain. Correspondingly, a first control board is set on one side of the standing plate on the seat of the seat, and the first control board is connected to the tenon.

The seat back interlocking device as described above, wherein the seat back interlocking device of the chair further includes a lift control unit, the lift control unit includes a second control board, the second control board is assembled on one side of the seat cushion group vertical board, and includes a driving handle, and the driving handle is connected with the second control board, and a hollow part is formed in the seat chassis, and the driving handle is arranged in the hollow part of the seat chassis, and is pivotally connected with the seat chassis. The seat chassis is provided with a lifting rod in the middle of its bottom, and an actuating button is arranged on the upper end of the lifting rod, and the upper end of the lifting rod is located in the hollow part of the seat chassis, and the front end of the driving handle is contacted with the actuating button on the upper end of the lifting rod.

In this way, when the user sits on the seat cushion set on the seat cushion assembly vertical plate, the seat cushion assembly vertical plate takes the pivot joint with the seat main body as the fulcrum. The rear side of the main body moves backwards, and the pivotal joint between the main body of the seat seat and the seat cushion assembly vertical plate forms a top support to prop up the seat cushion assembly vertical plate, so as to make the seat back tilt synchronously with the seat and improve the riding comfort effect.

In order to enable a more complete and clear disclosure of the technical means of the present invention and the effects it can achieve, the detailed description is as follows. Please also refer to the disclosed drawings and drawing numbers:

First of all, please refer to the first figure, which is the seat-back linkage device of the chair of the present invention, which mainly includes:

A seat main body (1) is provided with a chassis assembly (11) at the front side of the seat main body, and a seat back assembly (13) is provided at the rear side of the seat main body (1). In addition, the seat body (1) is provided with a shrapnel group vertical groove (12) between the chassis assembly (11) and the backrest assembly (13), and the rear groove wall of the shrapnel group vertical groove (12) and the seat back assembly ( 13) It is set up adjacently, and a chair back (6) is set in the chair back assembly (13) group;

A seat chassis (2), please refer to the second and third figures together, the seat chassis (2) is set at the chassis assembly (11) of the seat body (1), and at least one first pivot (21) is pivotally connected with the chassis assembly (11), and the front side of the seat chassis (2) is assembled with the rear end of a support spring (22), and the front end of the support spring (22) extends to the seat At the front of the chassis (2), the support spring (22) is gradually thrown upwards from the rear end to the front end in a curved arc shape. In addition, at least one cushion spring (23), at least one seat back spring (24) and a tip rod (25) are arranged in the spring group vertical groove (12) of the seat body (1). The seat back spring (24) is provided with several pieces, and the several seat back springs (24) are stacked and established, and the front ends of the seat cushion spring (23) and the seat back spring (24) are combined with the rear side of the seat chassis (2), and a through hole (231) is provided at the rear end of the seat cushion spring (23), and the tip rod (25) is passed through the through hole (231) of the seat cushion spring (23), And a stop portion (251) is provided at the bottom of the tip rod (25) for contacting against the bottom surface of the seat cushion shrapnel (23). In addition, a buckle portion (121) is provided at the back side groove wall of the shrapnel group vertical groove (12) relative to the chair back shrapnel (24), so that the rear end of the chair back shrapnel (24) is correspondingly positioned with the buckle portion (121) set on the shrapnel group vertical groove (12) rear side groove wall. The bottom of the vertical groove (12) of the shrapnel assembly is located at the bottom of the seat cushion shrapnel (23) and the seat back shrapnel (24) and is provided with a sound-absorbing piece (26) to reduce the abnormal sound generated when the seat cushion shrapnel (23) and the back shrapnel (24) are actuated, so that the seat chassis (2) is provided with a lifting rod (7) in the middle of its bottom. 1) Located in the hollow part (27) of the seat chassis (2);

A cushion assembly vertical plate (3) is to make the seat cushion assembly vertical plate (3) above the seat main body (1) and the seat chassis (2), and a seat cushion (31) is assembled on the upper end surface of the seat cushion assembly vertical plate (3), and a pivot ear (32) is respectively formed on the left and right sides of the seat cushion assembly vertical plate (3) bottom surface, and the seat main body (1) is respectively provided with a pivot portion (14) at the opposite positions on its left and right sides, The two side pivot ears (32) of the seat cushion assembly vertical plate (3) are respectively pierced with a second pivot (33), and the pivot joint of the seat cushion assembly vertical plate (3) and the seat main body (1) is located in front of the pivot joint of the seat main body (1) and the seat chassis (2), and the axial center position of the first pivot shaft (21) passing through the seat main body (1) and the seat chassis (2) at the pivot joint is higher than the seat cushion assembly vertical plate (3) The axis position of the second pivot (33) at the pivotal joint with the seat main body (1), and the seat cushion group vertical plate (3) is provided with a locking hole (36) at its rear side, so as to pass through and lock with the upper end of the tip rod (25) of the seat chassis (2). (34), and its upper and lower two ends of the connecting plate (34) are pivotally connected with the seat cushion group vertical plate (3) and the support elastic piece (22) respectively, and the connecting plate (34) is tilted from the rear top to the front downward, and an included angle (θ) of about 6 degrees is formed between the connecting plate (34) and the seat cushion group vertical plate (3), and the seat cushion group vertical plate (3) is provided with a connecting plate (34) at its front bottom surface ) corresponds to the groove (35) placed inside;

A chair back control unit (4), please also refer to the fifth figure, is composed of a tenon (41), so that the tenon (41) is arranged in the vertical groove (12) of the spring group (1) of the seat body (1), and the vertical groove (12) of the spring group is provided with at least one groove (122) at its rear side groove wall. 22), and make the tenon (41) correspond to a card groove (122) according to the adjustment needs, and a first elastic member (42) is set between the rear side groove wall of the elastic plate group vertical groove (12) and the tenon (41). A locking part (44) is provided between the seat cushion group vertical boards (3), and the first control board (43) is connected with the tenon (41) by a first pull rope (45);

A lifting control unit (5) includes a second control board (51), and the second control board (51) is arranged on the other side of the bottom of the seat cushion group vertical board (3) relative to the first control board (43), and the second control board (51) is connected with the seat cushion group vertical board (3) with a second elastic member (52). ) is arranged in the hollow part (27) of the seat chassis (2), and is pivotally connected with the seat chassis (2), and the front end of the driving handle (53) is in contact with the actuating button (71) of the elevating rod (7), and the second control board (51) is connected with the rear end of the driving handle (53) by a second pull cord (54).

According to this, when the user is seated on the seat cushion (31) of the chair of the present invention, after bearing the weight of the user, the seat cushion group vertical plate (3) will take the second pivot (33) pivot joint with the seat body (1) as the fulcrum, so that the front side of the seat cushion group vertical plate (3) will be displaced downward, and at the same time, the rear side of the seat cushion group vertical plate (3) will be relatively upwardly displaced, and by being assembled on the seat cushion group vertical plate (3) The tip bar (25) on the rear side will pull up the seat cushion shrapnel (23) connected with the tip bar (25), and use the elastic buffer of the seat cushion shrapnel (23) to make the front side of the seat cushion group vertical plate (3) lower slowly to the front end of the supporting spring piece (22). The front side of the assembly vertical board (3) is set at an inclination angle of 6 degrees forward to facilitate the user's riding comfort.

Furthermore, please also refer to the seventh figure, when the user leans against the chair back (6) and pushes back the seat back assembly (13) on the rear side of the seat main body (1), the elastic buffer of the seat back spring (24) adjacent to the seat back assembly (13) can make the seat back (6) produce an elastic swing effect. (2) The pivot joint of the first pivot (21) is used as a fulcrum, so that the seat back (6) moves backwards and downwards in conjunction with the rear side of the assembled seat body (1). At this time, the seat body (1) located in front of the pivot joint between the seat main body (1) and the seat chassis (2) and the seat cushion assembly vertical plate (3) will move upward relative to the second pivot axis (33) at the pivot joint, so as to pass through the pivot ears set on the left and right sides of the seat cushion assembly vertical plate (3). (32) The seat cushion assembly upright plate (3) is propped up, and here, the user can use the force of the user lying on the back of the chair (6) to bear the weight of the user sitting on the seat cushion (31) of the seat, and push the user's body upwards synchronously to achieve the effect of self-loading. The linkage effect between the seat back (6) and the seat seat improves the comfort of the user when riding on the chair.

When the user leaves the chair back (6) and leans against it, the deformed chair back shrapnel (24) due to the user leaning against the chair back (6) will return to its original state and drive the chair back assembly (13) on the rear side of the seat main body (1) assembled with the chair back (6) to reset together. Please also refer to the eighth figure, and then the user can manually pull the first control panel (43) of the seat back control unit (4) to move the connected tenon (41) through the first pull cord (45), so that the tenon (41) is correspondingly locked in the groove (122) set on the rear side groove wall of the spring group vertical groove (12) of the seat body (1), and then the chair back adjacent to the rear side groove wall of the spring group vertical groove (12) The upright part (13) produces a braking effect so that the seat back (6) is fixed. In this way, the interlocking effect between the seat back (6) and the seat seat can be released. At this time, the locking part (44) set between the first control board (43) and the seat cushion assembly vertical board (3) can fix the locking state of the tenon (41) and the groove (122). After the locking part (44) is released, the tenon (41) is connected by the first elastic part (42) ) is pulled and reset to disengage from the locking of the groove (122).

When the user leaves the seat, the user sits on the seat cushion (31) of the seat cushion group vertical plate (3), and the deformed seat cushion shrapnel (23) will return to its original shape to pull the connected tip rod (25) to move downward. , the front side of the seat cushion assembly vertical plate (3) can be displaced upward relatively, so that the seat cushion assembly vertical plate (3) returns to a flat state.

In addition, when the user wants to adjust the seat lift, he can pull the second control plate (51) of the lift control unit (5), so that the second control plate (51) pulls the driving handle (53) through the second pull cord (54) to move. Please also refer to the ninth figure, and make the front end of the driving handle (53) press the control button (71) of the air pressure rod (7), so as to drive the air pressure rod (7) to drive the assembled seat chassis (2) together with the seat body (1 ) and so on to move the seat up and down. When the user releases the pull of the second control board (51), the elastic recovery effect of the second elastic member (52) provided between the second control board (51) and the seat cushion assembly vertical board (3) is used to drive the front end of the driving handle (53) to break away from the pressure on the control button (71) of the air rod (7), so as to fix the adjusted height of the seat.

The aforementioned embodiments or drawings do not limit the implementation of the present invention. The present invention can omit the installation of the connecting plate (34) between the seat cushion assembly riser (3) and the seat chassis (2) and its support springs (22), so that the front end of the seat support chassis (2) support springs (22) directly touches the front bottom surface of the seat cushion assembly riser (3). Appropriate changes or modifications made by those with ordinary knowledge in the technical field should be considered as not departing from the present invention. the scope of the patent.

As can be seen from the above structure and implementation, the present invention has the following advantages:

1. The seat-back linkage device of the present invention has simple structural design, low manufacturing cost, and effectively utilizes the inner space of the seat to facilitate the flattening of the seat-back linkage device.

2. The seat back linkage device of the chair of the present invention is to simultaneously support the body of the user sitting on the seat when the user is lying on the back of the chair, thereby utilizing the strength of the user himself lying on the back of the chair to carry the weight of the user's body on the seat to achieve the effect of self-loading.

3. The seat back linking device of the chair of the present invention is provided with a connecting plate between the seat cushion assembly vertical plate and the supporting spring, and an angle of about 6 degrees is formed between the connecting plate and the seat cushion assembly vertical plate, whereby when the user sits on the seat cushion, the seat cushion can be tilted forward 6 degrees to improve riding comfort.

To sum up, the embodiment of the present invention can indeed achieve the expected effect, and the specific structure disclosed by it has not only been seen in similar products, but also has not been disclosed before the application, and it has fully complied with the provisions and requirements of the Patent Law. It is really convenient to file an application for a patent for invention according to the law, and earnestly ask for the review and approval of the patent.

1: Seat body

11: Chassis assembly department

12: shrapnel group vertical groove

121: buckle part

122: card groove

13: Chair back assembly department

14: Pivot

2: Seat chassis

21: First Pivot

22: Support shrapnel

23: Seat shrapnel

231: through hole

24: Seat back shrapnel

25: tip rod

251: stop part

26: Noise reduction sheet

27: Hollow part

3: seat cushion upright

31: seat cushion

32: hub ear

33: Second Pivot

34: connecting plate

35: Groove

36: Keyhole

4: Seat back control unit

41: tenon

42: The first elastic member

43: The first control panel

44: Locking parts

45: First drawstring

5: Lifting control unit

51: Second control panel

52: Second elastic member

53:Drive handle

54: Second drawstring

6: Chair back

7: Lifting rod

71: Action button

The first figure: the perspective view of the present invention

Second figure: a sectional view of the present invention

The third figure: its second sectional view of the present invention

Figure 4: a partially enlarged sectional view of the present invention

The 5th figure: its second partial enlarged sectional view of the present invention

Figure 6: Partially enlarged sectional view of the sitting state of the seat of the present invention

The seventh figure: a cross-sectional view of the chair back of the present invention in a reclining state

Figure 8: Partially enlarged cross-sectional view of the chair back locking state of the present invention

Figure 9: Partially enlarged cross-sectional view of the driving state of the lifting rod of the present invention

1: Seat body

11: Chassis assembly department

13: Chair back assembly department

2: Seat chassis

22: Support shrapnel

3: seat cushion upright

31: seat cushion

32: hub ear

34: connecting plate

4: Seat back control unit

43: The first control panel

44: Locking parts

5: Lifting control unit

51: Second control panel

52: Second elastic member

6: Chair back

7: Lifting rod

Claims (10)

A seat-back linkage device for a chair, comprising: A seat body is provided with a chassis assembly at the front side of the seat body, and a seat back assembly at the back of the seat body, and the seat body is provided with a spring sheet assembly vertical groove between the chassis assembly and the seat back assembly, and the rear groove wall of the spring sheet assembly vertical groove is adjacent to the seat back assembly; A seat chassis, the seat chassis is set at the chassis assembly vertical part of the seat main body, and at least one first pivot is passed through and pivoted with the chassis assembly vertical part, and the front side of the seat chassis is assembled with the rear end of a support spring, and the front end of the support spring extends to the front of the seat chassis, and at least one seat back spring is arranged in the vertical groove of the seat body, and the front end of the seat back spring is connected to the seat chassis The rear side is assembled, and a buckle portion is provided at the rear side groove wall of the vertical groove of the shrapnel group opposite to the seat back shrapnel, so that the rear end of the chair back shrapnel and the buckle portion set on the rear side groove wall of the vertical groove of the shrapnel group are correspondingly locked and positioned; For a cushion assembly vertical plate, the seat cushion assembly vertical plate is located above the seat body and the seat chassis, and is pivotally connected with the seat body by at least one second pivot, and the pivot joint between the seat cushion assembly vertical plate and the seat body is located in front of the pivot joint between the seat body and the seat chassis, and the front end of the support spring of the seat chassis is in contact with the front side of the seat cushion assembly vertical plate. The seat back linking device of the chair according to claim 1, wherein at least one cushion spring and a tip rod are further arranged in the spring assembly vertical groove of the seat main body, so that the front end of the seat cushion spring is assembled at the rear side of the seat chassis, and a through hole is provided at the rear end of the seat cushion spring, and the tip rod is penetrated in the through hole of the seat cushion spring, and a stopper is provided at the bottom of the tip rod for abutting against the bottom surface of the seat cushion spring. In addition, the upper end of the tip rod is assembled at the rear side of the seat cushion group vertical plate, and a connecting plate is provided between the front side of the seat cushion group vertical plate and the front end of the supporting elastic piece of the seat chassis, and the upper and lower ends of the connecting plate are pivotally connected with the seat cushion group vertical plate and the supporting elastic piece respectively. The seat-back linkage device of the chair according to claim 2, wherein the connecting plate is inclined from the upper rear to the lower front, so that an angle is formed between the connecting plate and the seat cushion vertical plate. The seat back linkage device of the chair according to claim 3, wherein the angle between the connecting plate and the seat cushion assembly vertical plate is 6 degrees. The seat-back interlocking device of the chair according to claim 2, wherein, the seat cushion assembly vertical plate is provided with a groove at the front bottom surface thereof, so that the connecting plate can be correspondingly accommodated in the groove. The seat-back interlocking device of the chair according to claim 1, wherein, the supporting elastic piece is gradually thrown upwards from the rear end to the front end in a curved arc shape. The seat back linkage device of the chair according to claim 1, wherein, the seat cushion assembly vertical plate is formed with a pivot ear at the left and right sides of the bottom surface, and the seat main body is respectively provided with a pivot at the opposite positions on the left and right sides, so as to pass through and pivot with the two side pivot ears of the seat cushion assembly vertical plate through a second pivot respectively. The seat back linkage device of the chair according to claim 1, wherein, the main body of the seat is provided with a sound-absorbing sheet at the bottom of the vertical groove of the elastic sheet assembly, which is located below the seat back elastic sheet. The seat back linkage device of the chair as described in claim 1, wherein the seat back linkage device of the chair further includes a seat back control unit, and the seat back control unit includes a tenon, so that the tenon is arranged in the vertical groove of the spring group of the seat body, and the vertical groove of the spring group is provided with at least one groove in the middle of the rear side groove wall to engage with the tenon. connected. The seat back interlocking device of the chair according to claim 1, wherein the seat back interlocking device of the chair further includes a lift control unit, the lift control unit includes a second control board, the second control board is assembled on one side of the seat cushion group vertical plate, and includes a driving handle, and the driving handle is connected with the second control board, and a hollow part is formed in the seat chassis, and the driving handle is arranged in the hollow part of the seat chassis, and pivotally connected with the seat chassis , and a lifting rod is set in the middle of the bottom of the seat chassis, and an actuating button is arranged on the upper end of the lifting rod, and the upper end of the lifting rod is located in the hollow part of the seat chassis, and the front end of the driving handle is in contact with the actuating button on the upper end of the lifting rod.