TWM642733U - Backrest for a chair - Google Patents

Abstract

A chair back, comprising a flexible backrest part, a back seat part supporting the backrest part, and an adjustment part driving the backrest part to produce curvature change, wherein, the top end of the backrest part is in contact with the backrest part The back seat part is connected and fixed, and its bottom end is connected with the adjustment part, which can be driven to make the backrest part bear force to produce a change in curvature. The back seat part has a base for the adjustment part to be installed and fixed. The two parts of the base Each side extends toward the backrest part with a wing part and abuts against the backrest part so as to obtain support.

Description

chair back

This creation is used on chairs, especially a chair back that can adjust the curvature of the chair back according to the needs of use to make it more suitable for the back.

In order to increase the comfort of the ride, the fit of the back of the chair is absolutely one of the indispensable factors. If the sitting posture is not properly supported for a long time, not only will you feel back pain, but may even cause permanent damage such as spinal deformation.

In previous technical documents, patents including the Republic of China Announcement No. I327901 "Cushion Body Adjustment System" and No. I373317 "Cushion Body Structure Improvement of Chairs" discussed this issue. Among them, the No. I327901 patent uses a complex air bag circuit to inflate the back of the seat to change its curvature, so that the occupant's waist and back can be supported. Although it can achieve a certain effect, the cost is expensive, and these inflatable components It must be buried in the back of the chair, and it will be difficult to repair and maintain if it breaks down or produces a wrong action.

As for the No. I373317 patent, a plurality of elastic pads are installed in front of the back of the chair, and the elastic pads are deformed to support the back of the human body through the traction of the stay cord. Although the structure is relatively simple, these elastic pads are still covered in foam If there is a fault or wrong action, the foam and the seat back must also be removed during maintenance. Separation is not only a complicated process, but also may cause damage during disassembly; moreover, these multiple elastic pads only partially support the back of the human body, and the deformation and extension of the seat back are limited, which is difficult to satisfy the occupants. back needs.

In addition to the above, although the chair back disclosed by the applicant in the patent No. I619453 and I746773 can change the curvature through a simple mechanism design, the support of the flexible chair back to the back of the human body in actual use The stability is slightly insufficient, especially when the force is uneven on the left and right sides, and when adjusting the curvature of the chair back, it is laborious to release the locking mechanism and move the chair back position by hand.

Based on the problems existing in these previous technologies, the creators specially proposed a more novel "chair back" design, which not only has the function of adjusting the curvature of the chair back, but also takes into account the support of the back of the chair to the back of the human body. , so that the user can adjust the curvature of the back of the chair to meet the requirements of the back in a safe and secure situation. At the same time, it also has the effects of convenient assembly, labor-saving operation, and easy maintenance. This is the main purpose of this creation.

In order to achieve the purpose of creation, the chair back of this creation includes a flexible backrest part, a back seat part supporting the backrest part, and an adjustment part that drives the backrest part to produce curvature changes, wherein the backrest part The top of the back part is connected and fixed to the back seat part, and its bottom end is connected to the adjustment part and can be driven to make the back part be stressed to produce a curvature change. The back seat part has a base for the adjustment part to install. fixed, special In particular, the two sides of the base also extend toward the backrest portion with a wing portion abutting against the backrest portion, so that the backrest portion can not only change the curvature but also obtain good support.

In addition, the adjustment part also includes a fixed seat, a movable seat, an operating rod and a transmission mechanism connected between the fixed seat and the movable seat; wherein, the fixed seat is fixed on the base of the back seat and does not move , it has at least one limit hole, the movable seat is arranged between the fixed seat and the base, it has at least one connection plate passing through the limit hole and connected to the bottom end of the backrest, by applying force to the operation The rod can drive the transmission mechanism to make the movable seat move up and down, and the up and down movement of the movable seat will pull the surface of the backrest part to change the curvature, so as to achieve the purpose of easy assembly.

In addition, the transmission mechanism also includes a gear and a connecting rod. The gear train is sheathed on a first shaft seat of the fixed seat to be rotatable. One end is fixed on the gear and is linked with the rotation of the gear to change its position, and the opposite end of the connecting rod is movably sleeved on a second shaft seat of the movable seat; wherein, the position of the second shaft seat Relative to the position of the first axle seat, the movable seat is pulled to move when the connecting rod changes position with the rotation of the gear, and because the connecting plate is restricted by the limiting hole, the movable seat can only move up and down in a straight line, so as to save labor the purpose of the operation.

In addition, one end of the operating rod is passed through any wing of the back seat into the space contained by the base and positioned below the gear, so as to obtain stable support and good operating effect.

In addition, at least one buffer gasket is installed between the fixed seat and the movable seat, and the buffer gasket slightly protrudes from the limiting hole, so as to prevent the movable seat from directly colliding with the fixed seat when it is in motion. And has the effect of noise reduction and shock absorption.

Please refer to the implementation mode described later to fully understand the detailed content, the structure of the composition and the effect of this creation.

1: chair back

2: Backrest

20: top

21: Bottom

3: Back seat

30: base

300: top

301: Bottom

31: wing

32: Connecting part

4: Adjustment Department

40: fixed seat

400: limit hole

401: The first shaft seat

402: buffer gasket

403: Pedestal

41: movable seat

410: board connection

411:Second shaft seat

412: pivot

42: Joystick

420: Operation Department

421: Teeth

43: Transmission mechanism

430: gear

431: Connecting rod

4310: one end

4311: opposite end

5: Chair

Fig. 1 is the appearance drawing of the chair equipped with the chair back of this creation.

Fig. 2 is the exploded view of the chair back of this creation.

Fig. 3 is the adjustment part diagram of the chair back of this creation.

Fig. 4 is the side sectional view after the adjustment part of the chair back of this creation is assembled.

Fig. 5 and Fig. 6 are the continuous diagrams of the operating state of the back of the chair of this creation.

Fig. 7 is the active state schematic diagram of the chair back curvature adjustment of this creation.

Please refer to Fig. 1 ~ Fig. 4 at the same time, the chair back 1 of this creation mainly includes a flexible back rest part 2, a back seat part supporting the back rest part 2 3, and an adjustment part 4 that drives the backrest part 2 to produce a curvature change, and the backrest part 3 is fixed on the chair 5, and the backrest part 2 provides the occupant's back to lean on.

The top end 20 of the backrest part 2 is connected and fixed to the back seat part 3 , and the bottom end 21 is connected to the adjustment part 4 and can be driven to cause the backrest part 2 to change its curvature under force.

The back seat part 3 has a base 30 to provide the main mechanical components of the adjustment part 4 to be installed and fixed. Two sides of the base 30 extend toward the backrest part 2 with a wing part 31 to abut against the backrest part 2, so that the backrest part 2 The backrest 2 can obtain good support when it is leaned against by force; a connection mechanism 32 is provided between the top 300 of the base 30 and the corresponding backrest 2 to connect the two, and the bottom 301 of the base 30 is not connected to the backrest 2. The back rest 2 is connected so that the bottom end 21 of the back rest 2 maintains a movable state.

The adjustment part 4 includes a fixed seat 40, a movable seat 41, an operating rod 42 and a transmission mechanism 43 connected between the fixed seat 40 and the movable seat 41, wherein the fixed seat 40 is fixed on the back seat The base 30 of the part 3 does not move, it has at least one limit hole 400, the movable seat 41 is arranged between the fixed base 40 and the base 30, and it has at least one connecting plate 410 passing through the limit hole 400 and the back The bottom end 21 of the back part 2 is connected, and the transmission mechanism 43 can be driven by applying force to the operating rod 42 to make the movable seat 41 move up and down, and the up and down movement of the movable seat 41 will pull the backrest part 2 Surface changes in curvature.

Furthermore, the transmission mechanism 43 includes a gear 430 and a connecting rod 431, the gear 430 is sheathed on a first shaft seat 401 preset by the fixed base 40 for rotatable movement, and one end of the connecting rod 431 4310 is fixed on the gear 430 and changes its position with the rotation of the gear 430. The opposite end 4311 of the connecting rod 431 is movably sleeved on a second shaft seat 411 preset by the movable seat 41, wherein , the position of the second shaft seat 411 is lower than that of the first shaft seat 401. When the connecting rod 431 changes position with the rotation of the gear 430, it will pull the movable seat 41 to move. The limitation of 400 makes the movable seat 41 only move up and down in a straight line. Preferably, at least one buffer washer 402 is installed on the fixed seat 40 between the movable seats 41, and the buffer washer 402 slightly protrudes from the limiting hole 400, so as to prevent the movable seat 41 from It directly collides with the fixing seat 40 to have the effects of noise reduction and shock absorption.

One end of the operating rod 42 passes through one of the wings 31 of the back seat part 3 into the space contained by the base 30 and is positioned on the fixed seat 40 below the gear 430. In the embodiment disclosed in this creation Among them, a pair of shaft brackets 403 are set on the fixed seat 40 to provide the positioning of the operating rod 42, and an operating part 420 is provided at its end to provide the operator to hold and apply force to rotate the operating rod 42; the operating rod 42 also has a section The teeth pattern 421 corresponds to and meshes with the upper gear 430 . In other words, the rotation of the operating lever 42 can drive the gear 430 to rotate and the movable seat 41 to move up and down.

Preferably, a shaft 412 is pierced on the connecting plate 410 at the bottom end of the movable seat 41, and the shaft 412 is used to connect the bottom end 21 of the backrest 2 to make it move with the movable seat 41. When the movable seat 41 moves upward, the bottom end 21 of the flexible backrest part 2 also moves upwards. Since the top part 20 of the backrest part 2 is fixed on the backseat part 3, the backrest part 2 is squeezed by force. The surface will be raised to produce a change in curvature.

Please refer to Figure 5~Figure 7 at the same time. The operator only needs to rotate the operating rod 42 through the operating part 420 to drive the gear 430 to rotate (clockwise as shown in Figure 5), and the connecting rod 431 driven by the gear 430 will pull the movable seat 41 upward, and use the connecting plate 410 Restricted by the limit hole 400, the linear motion is maintained, and the bottom end 21 of the backrest part 2 connected to the connecting plate 410 is displaced upward synchronously to produce a raised curvature change as shown in FIG. The back of the patient needs.

The above description is only a series of examples of one of the better implementation modes of this creation, and is not intended to limit the substantive content of this creation. Any equivalent replacements and simple modifications made by those familiar with the art using this creation should still be used by future generations. The coverage contained in the scope of the patent application is described first.

1: chair back

2: Backrest

20: top

21: Bottom

3: Back seat

30: base

300: top

301: Bottom

31: wing

32: Connecting part

4: Adjustment Department

40: fixed seat

41: movable seat

410: board connection

412: pivot

42: Joystick

420: Operation Department

430: gear

431: Connecting rod

Claims (8)

A chair back, comprising a flexible backrest part, a back seat part supporting the backrest part, and an adjustment part driving the backrest part to produce curvature change, wherein, the top end of the backrest part is in contact with the backrest part The back seat part is connected and fixed, and its bottom end is connected with the adjustment part and can be driven to change the curvature of the back seat part. The back seat part has a base to install and fix the adjustment part, and the two sides of the base face There is a wing portion extending in the direction of the backrest portion to abut against the backrest portion so as to obtain support. The chair back as claimed in claim 1, wherein any wing of the back seat part is pierced with an operating rod that enters into the space contained by the base to drive the adjustment part. As for the chair back described in claim 2, the adjustment part includes a fixed seat, a movable seat, and a transmission mechanism connected between the fixed seat and the movable seat; wherein, the fixed seat is fixed on the back seat The base does not move, it has at least one limit hole, the movable seat is located between the fixed seat and the base, and it has at least one connecting plate passing through the limit hole and connected to the bottom end of the backrest, by which The operating rod can drive the transmission mechanism to make the movable seat move up and down, and the up and down movement of the movable seat will pull the surface of the backrest part to change the curvature. As for the chair back described in claim 3, the transmission mechanism includes a gear and a connecting rod, the gear train is sheathed on a first shaft seat of the fixed seat to be rotatable, and the operating rod has a section of teeth and One end of the connecting rod is fixed on the gear and is linked with the rotation of the gear to change its position, and the opposite end of the connecting rod is movably sleeved on a second shaft seat of the movable seat; wherein, the second The position of the shaft seat is lower than that of the first shaft seat. When the connecting rod changes position with the rotation of the gear, the movable seat is pulled to move, and because the receiving plate is restricted by the limiting hole, the movable seat can only move up and down in a straight line . A chair back, comprising a flexible backrest part, a back seat part supporting the backrest part, and an adjustment part, the top end of the backrest part is connected and fixed to the back seat part, and the bottom end is connected to the backrest part The adjustment part is connected and can be driven to change the curvature of the backrest part. The back seat part has a base to provide the adjustment part to be installed and fixed; wherein, the adjustment part includes a fixed seat, a movable seat, and an operating rod and a transmission mechanism connected between the fixed seat and the movable seat, the fixed seat is fixed on the back seat and has at least one limit hole, the movable seat is arranged between the fixed seat and the base, It has at least one connection plate passing through the limit hole and connected to the bottom of the backrest part. By applying force to the operating rod, the transmission mechanism can be driven to make the movable seat move up and down, and the up and down movement of the movable seat will pull the A change in curvature occurs on the surface of the backrest. As for the chair back described in claim 5, the transmission mechanism includes a gear and a connecting rod, the gear train is sheathed on a first shaft seat of the fixed seat to be rotatable, and the operating rod has a section of teeth and One end of the connecting rod is fixed on the gear and is linked with the rotation of the gear to change its position, and the opposite end of the connecting rod is movably sleeved on a second shaft seat of the movable seat; wherein, The position of the second shaft seat is lower than that of the first shaft seat. When the connecting rod changes position with the rotation of the gear, the movable seat is pulled to move, and because the receiving plate is restricted by the limiting hole, the movable seat can only Move up and down in a straight line. The chair back according to any one of Claims 3 to 6, wherein at least one buffer washer is installed on the fixed seat and between the movable seats, and the buffer washer slightly protrudes from the limiting hole. The chair back as described in any one of claims 3 to 6, wherein a shaft is pierced on the connection plate at the bottom of the movable seat, and the shaft is used to connect the bottom of the backrest to the movable seat. seat linkage.

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