TW201932050A - Chair back curvature adjustment device - Google Patents

Abstract

The chair back curvature adjustment device includes a flexible chair back; a first post for supporting the chair back; a first holding mechanism, connected between a first position of the chair back and the first post; a second holding mechanism connected between a second position of the chair back and the first post and having a connecting portion connected to the second position of the chair back and a moving portion capable of moving on the first post; a first locking mechanism disposed on the second holding mechanism for selectively fixing the second holding mechanism to the first post; a second post for supporting the first post; and a third holding mechanism connected between the first post and the second post for holding the first post on the second post.

Description

Backrest curvature adjustable device

The invention relates to a chair, in particular to a chair back curvature adjustable device which can adjust the curvature and position of the seat back according to the needs of use, so as to make it more back-to-back.

In order to increase the comfort of the ride, the back of the chair is definitely an indispensable factor for the back of the body. In the long sitting position, if the back of the human body is not properly and comfortably supported, it will not only feel the back. Pain is more likely to cause permanent damage such as spinal deformity.

In the prior art, the back of the chair is inflated to change the curvature of the surface, so that the occupant's back is supported, although a certain effect can be achieved, but the cost is expensive; and these inflatable components must be buried in the back of the chair. If a malfunction or malfunction occurs, it will be difficult to repair and maintain. Moreover, these inflatable elements are fixed in a buried position, and only provide support for the back of the human body at a specific part after expansion, and the deformation of the seat back is limited, and it is difficult to fully satisfy the occupant's use requirements.

In addition, the "adjustable seat back device" disclosed in the inventor's prior application No. 105,127,965 can achieve the adjustable function of the back of the chair through simple assembly and structure, but the seat back is completed on a separate bracket. The adjustment of the different curvatures reduces the space that can be moved. Especially after adjusting the most comfortable back support curvature, it can no longer change its position, and there is still room for improvement.

The invention relates to a chair back curvature adjusting device, which has the advantages of convenient assembly, simple operation and maintenance, and better ductility of the back curvature adjustment, and the like mainly includes a flexible chair. a first support for supporting the back of the chair; a first retaining mechanism coupled between the first position of the seat back and the first bracket; a second retaining mechanism, the second retaining mechanism Attached between the second position of the seat back and the first bracket, having a connecting portion and a movable portion, the connecting portion being connected to the second position of the seat back, the movable portion being movable on the first bracket; a first locking mechanism for fixing the second holding mechanism to the first bracket; a second bracket supporting the first bracket; and a third holding mechanism coupled to the first bracket and the second bracket Between the first bracket is held on the second bracket. By adjusting the movable portion of the second holding mechanism relative to the position of the first bracket, the change of the curvature of the back surface of the seat can be made to make the backing property more attractive.

In addition, the third holding mechanism has an action portion and a second locking mechanism, which can help the first bracket to change the position of the seat back on the second bracket, and the second locking mechanism Fixed. In this way, the position of the corresponding human body after the curvature of the back surface of the chair is changed can be controlled according to the operation manner. In other words, the position of the first bracket is adjustable, and the seat back connected to the first bracket is lower than the second bracket. The position can be applied to the lower back of the human body. Conversely, if the position of the raised surface of the surface is raised, it can be attached to the shoulder and neck of the human body as a leaning, which can better meet the needs of the user.

1‧‧‧Back of the chair

10‧‧‧First position of the back of the chair

11‧‧‧Second position of the back of the chair

110‧‧‧ fixed seat

2‧‧‧First holding institution

3‧‧‧Second holding institution

30‧‧‧Connecting Department

300‧‧‧Fixed rod

31‧‧‧ Activities Department

310‧‧‧Perforation

311‧‧‧Mounting holes

4‧‧‧First bracket

40‧‧‧Aperture

41‧‧‧ channel

5‧‧‧First locking mechanism

50‧‧‧ button

51‧‧‧ Spring

510‧‧ ‧ one end of the spring

511‧‧‧ the other end of the spring

52‧‧‧ latch

520‧‧‧Brake

521‧‧‧ neck

522‧‧‧ bolt

523‧‧ ‧block

6‧‧‧second bracket

60‧‧‧Fixed holes

7‧‧‧ Third holding institution

70‧‧‧Action Department

8‧‧‧Second locking mechanism

Figure 1 is an external view of the present invention.

Fig. 2 is a schematic view showing the adjustment of the back curvature of the present invention.

Figure 3 is a diagram showing the connection relationship between the second holding mechanism of the present invention and the seat back and the first bracket.

Fig. 4 is a view showing the arrangement relationship between the second holding mechanism and the first locking mechanism of the present invention.

Figure 5 is a side cross-sectional view showing the first locking mechanism interference movable portion of the present invention.

Figure 6 is an operation diagram of the present invention for unlocking the interference state of the first locking mechanism with respect to the movable portion.

As shown in Figure 1, the present invention includes a flexible seat back 1, a first retaining mechanism 2, a second retaining mechanism 3, a first bracket 4 supporting the seat back 1, and a first locking mechanism 5; The first holding mechanism 2 is connected between the first position 10 of the seat back 1 and the first bracket 4, and the second holding mechanism 3 is connected between the second position 11 of the seat back 1 and the first bracket 4. The seat back 1 is held on the first bracket 4; when the first holding mechanism 2 is fixed, the second holding mechanism 3 is biased to move on the first bracket 4, so that the second back of the seat back 1 can be linked. The position 11 changes its height relative to the first bracket 4, so that the surface of the seat back 1 changes in curvature, which is more suitable for the support of the back of the human body.

In the above, the second holding mechanism 3 has a connecting portion 30 and a movable portion 31. Preferably, the connecting portion 30 is connected to the bottom end of the seat back 1, and the movable portion 31 is connected to the first bracket 4, The first locking mechanism 5 is fixed to the first bracket 4, and after the locking of the first locking mechanism 5 is released, the movable portion 31 can be adjusted at different height positions on the first bracket 4. As shown in FIG. 2, as long as the movable portion 31 changes position, the flexible seat back 1 can be compressed or stretched to cause a change in curvature of the surface; in other words, the first and second holding mechanisms 2 The closer the distance between 3 and the greater the curvature of the surface of the back of the chair, the greater the degree of curvature, which means it can provide a more rigid support; If the distance between the two holding mechanisms 2, 3 is farther, the curvature of the surface of the seat back 1 is smaller, which also means that it provides a softer support, which is a controllable adjustment. With this adjustment, it is more able to meet the different needs and comfort of the user.

The invention also includes a second bracket 6, a third retaining mechanism 7, and a second locking mechanism 8. The third holding mechanism 7 is connected between the first bracket 4 and the second bracket 6 so that the first bracket 4 is held on the second bracket 6; wherein the third holding mechanism 7 has a The action portion 70, as indicated by the direction of the arrow in FIG. 1, can help the first bracket 4 to change its height position on the second bracket 6, and is fixed by the second locking mechanism 8. In the embodiment of the present invention, the action portion 70 is a set of rings for socketing on the second bracket 6. The second bracket 6 is provided with a plurality of axially arranged fixing holes 60. The second locking mechanism 8 is connected to the action portion 70 by a bolt. By the second locking mechanism 8 passing through the action portion 70 into any of the fixing holes 60, the third holding mechanism 7 can be fixed to the second bracket. At the same time, the height position of the first bracket 4 relative to the second bracket 6 is also fixed. In other words, the position of the first bracket 4 is adjustable, and the seat back 1 connected to the first bracket 4 can be adapted to be attached to the lower back of the human body when the second bracket 6 is lower than the second bracket 6, and if the surface is raised, When the position of the back of the chair is raised, it can be attached to the shoulder and neck of the human body as a leaning.

Referring to FIG. 3, FIG. 4, and FIG. 5, a fixing rod 300 is disposed on the connecting portion 30 of the second holding mechanism 3, and a fixing seat 110 is disposed on the second position 11 of the seat back 1. The second retaining mechanism 3 is connected to the seat back 1 by the fixing rod 300; the movable portion 31 of the second holding mechanism 3 has a through hole 310 extending longitudinally through the movable portion 31 to provide a first bracket. 4, the movable portion 31 and the second holding mechanism 3 can change the position of the height on the first bracket 4, and the first locking mechanism 5 is disposed on the movable portion 31 for interfering with the movable portion. 31 is fixed to the first bracket 4.

In order to cooperate with the movable portion 31, a plurality of perforations 40 are axially disposed on the first bracket 4, and each of the perforations 40 is connected to each other to form an axial passage 41. The movable portion 31 is additionally provided with an installation. The hole 311 can communicate with the passage 41 and is used to mount the first locking mechanism 5.

As shown in FIG. 4, the first locking mechanism 5 includes a button 50 and a spring 51. The button 50 and the spring 51 are disposed in the mounting hole 311. The button 50 has a latch 52 passing through the mounting hole 311 and the passage. 41. The spring 51 is disposed on the adjacent side of the latch 52, and one end 510 abuts on the button 50, and the other end 511 of the axial direction abuts on the movable portion 31 through the passage 41, so that the button 50 can be pressed. The compression spring 51 produces an elastic action. In addition, the latch 52 has a braking portion 520 having a diameter wider than the width of the passage 41 but smaller than the perforation 40, and a neck portion 521 having a smaller width than the width of the passage 41. In the normal state, as shown in FIG. 5, the locking portion 520 is shown in FIG. The movement of the interference movable portion 31 is carried out in any of the perforations 40. Preferably, a stopper 523 having a larger diameter than the perforation 40 is connected to the end of the braking portion 520 by a bolt 522, so that the latch 52 can be prevented from being reversed. The mounting hole 311 is detached.

When operating, refer to Figure 6. After the pressure is applied to the button 50, the braking portion 520 of the latch 52 will disengage from the perforation 40 and lose the interference with the movable portion 31, while the compression spring 51 accumulates the elastic force; at this time, since the neck 521 of the pin 52 has a smaller diameter than the passage The width of 41 does not interfere with the actuation of the movable portion 31, so the movable portion 31 can be moved on the first bracket 4, that is, the second holding mechanism 3 can be moved on the first bracket 4 and interlocked with the seat back 1 Second position 11. When the second holding mechanism 3 is closer to the first holding mechanism 2, the angle at which the seat back 1 is bent is larger, and the back of the human body can be provided with a stronger support; conversely, when the second holding mechanism 3 faces away from the first holding mechanism When the direction is moved in 2 directions, the angle of bending of the back of the chair 1 becomes smaller, and the softer support is provided when attached to the back of the human body. After the seat back 1 is adjusted, the button 50 can be released, and the elastic force returned by the spring 51 can rebound the braking portion 520 into the corresponding perforation 40 to interfere with the movable portion 31 so that it can no longer be moved.

By the above, the seat back 1 can be bent to obtain proper support for the back of the human body through the operation and displacement of the second holding mechanism 3, and the operation of the first locking mechanism 5 is simple, as long as the button 50 is pressed by one hand. It is easy to complete; more importantly, after the seat back 1 curvature is completed on the first bracket 4, the height position of the seat back 1 can be moved on the second bracket 6, so that the seat back 1 can be adjusted to the orientation The most appropriate position on the back of the human body, such as the lower back, or the shoulder and neck, to meet all the needs of the user.

Claims (8)

A chair back curvature adjustable device, comprising: a flexible seat back; a first bracket supporting the seat back; a first holding mechanism, the first holding mechanism being coupled to the first position of the seat back and the Between the first brackets; a second retaining mechanism coupled between the second position of the seat back and the first bracket, having a connecting portion and a movable portion, the connecting portion and the seat back The second position is connected, and the movable portion is movable on the first bracket, and the movement of the movable portion relative to the different positions of the bracket can compress or extend the back of the seat to change the curvature of the surface; a first locking mechanism The second holding mechanism is fixed on the first bracket; a second bracket supporting the first bracket; and a third holding mechanism is connected between the first bracket and the second bracket, so that The first bracket is held on the second bracket; the third holding mechanism has an action portion and a second locking mechanism, which can help the first bracket change the position of the height on the second bracket, and borrow It is fixed by the second locking mechanism. The adjustable back seat curvature device of claim 1, wherein the action portion is a sleeve that is sleeved on the second bracket, and the second bracket is provided with a plurality of axially arranged fixing holes. The second locking mechanism is coupled to the active portion, and the second locking mechanism is passed through the active portion into any of the fixing holes to fix the third holding mechanism to the second bracket. The seat back curvature adjusting device of claim 1, wherein the connecting portion of the second holding mechanism is provided with a fixing rod, and a fixing seat is disposed at a second position of the back of the seat, by the fixing The rod is sleeved in the fixing seat to connect the second holding mechanism to the seat back. The backrest curvature adjusting device of claim 1, 2 or 3, wherein the movable portion of the second holding mechanism has a through hole extending longitudinally through the movable portion to provide a first bracket to penetrate, so that the first The second holding mechanism can change the position of the height on the first bracket, and the first locking mechanism is disposed on the movable portion for interfering with the movable portion to be fixed on the first bracket. The adjustable back seat curvature device of claim 4, wherein the first bracket is axially disposed with a plurality of perforations, each of the perforations being connected to each other such that the center naturally forms an axial passage on the movable portion. A mounting hole is further disposed to communicate with the channel for mounting the first locking mechanism. The back-curvature adjustable device of claim 5, wherein the first locking mechanism comprises a button and a spring, the button and the spring are disposed in the mounting hole, and the button has a pin through The mounting hole and the passage are arranged on the adjacent side of the bolt, one end of which is abutted on the button, and the other end of the axial direction abuts on the movable portion through the passage, so that the compressible spring generates elasticity after the button is stressed The latch has a braking portion having a diameter wider than the channel width but smaller than the perforation, and a neck having a diameter smaller than the width of the channel. In the normal state, the braking portion is in the movement of the interference movable portion in any of the perforations. The adjustable back seat curvature device of claim 6, wherein the end of the braking portion is connected with a stopper having a larger diameter than the perforation, and the latch can be prevented from being reversed from the mounting hole. A chair back curvature adjusting device comprises: a flexible chair back; a first bracket supporting a seat back, wherein a plurality of perforations are axially arranged on the first bracket, and each perforation is connected to each other to be central Naturally forming an axial passage; a first retaining mechanism coupled between the first position of the seat back and the first bracket; a second retaining mechanism coupled to the second retaining mechanism a second position of the seat back and the first bracket has a connecting portion and a movable portion, and the connecting portion is opposite to the second position of the seat back The movable portion has a through hole extending longitudinally through the movable portion to provide a first bracket to penetrate, so that the second holding mechanism can change the position of the height on the first bracket, and another mounting hole and the first bracket are disposed. a first locking mechanism for fixing the second holding mechanism to the first bracket, the first locking mechanism includes a button, and a spring, the button and the spring are disposed in the mounting hole a button has a pin passing through the mounting hole and the passage, the spring is disposed on the adjacent side of the pin, one end of the button abuts on the button, and the other end of the axial direction abuts the movable portion through the channel, so that the button After being stressed, the compressible spring generates an elastic action; the latch has a braking portion having a diameter wider than the channel width but smaller than the perforation, and a neck having a diameter smaller than the width of the passage. In the normal state, the braking portion is tied to either The movement of the interference moving part in the perforation.