Chair convenient for adjusting waist support

Abstract

The utility model relates to the field of chairs, in particular to a chair convenient for adjusting a waist support, which comprises a support base and a chair body arranged on the support base, a backrest is arranged on the chair body, the top of the support base is connected with the chair body through a support frame, one end of the support frame extends outwards to form a support beam for mounting the backrest, and the other end of the support frame is connected with the backrest. A waist cushion is arranged at the end, close to the waist, of the backrest, an elastic supporting part used for supporting the waist is formed on the outer surface of the waist cushion, a containing cavity is formed in the waist cushion, a waist supporting cushion is arranged in the containing cavity, a driving assembly used for driving the waist supporting cushion to stretch out and draw back towards the elastic supporting part is connected into the containing cavity, and a rotating shaft is connected to the driving assembly. According to the utility model, the driving assembly can be driven to work through the rotating shaft by operating the adjusting piece, so that the position of the waist support can be easily adjusted by controlling the stretching and retracting of the waist support cushion, the adaptive capacity of the seat is improved, and the convenience and efficiency of use are improved.

Description

Technical Field

[0001] The utility model relates to the field of seats, in particular to a seat which is convenient for adjusting waist support. Background Art

[0002] There are many types of existing chairs, and the basic structure generally includes the seat, backrest, armrest, legs and base. The seat is usually filled with soft materials such as sponge and memory foam to provide a comfortable sitting feeling. The backrest is used to support the back. Some chairs are also designed with an adjustable lumbar support system to adapt to the body shape and needs of different users. The armrests are used to support the arms and increase the stability and comfort of the sitting posture. The legs and base are responsible for supporting the weight of the entire seat and ensuring its stability and durability.

[0003] However, although some existing seats can provide lumbar support, they still have the following major defects: the lumbar support of existing seats is inconvenient to adjust. Although some seats are equipped with lumbar support structures, their adjustment methods are often complicated and not intuitive enough, and are not easy to adjust conveniently according to needs. This not only increases the difficulty of use, but also reduces the user experience. In addition, due to the poor adaptability of the existing adjustment effect, there are large differences in the body shape, height and sitting habits of different users, and the lumbar support structure of the existing seats is not easy to adjust according to needs, and the stability of the support adjustment structure is poor, which affects use. Utility Model Content

[0004] The purpose of the utility model is to solve the above defects and provide a seat with easy-to-adjust lumbar support to solve the technical problems in the above background technology that the lumbar support of the seat is not easy to adjust according to needs and the support stability is poor.

[0005] The purpose of the utility model is achieved by the following methods:

[0006] A chair with easy-to-adjust lumbar support comprises a support base and a chair body arranged on the support base, a backrest is arranged on the chair body, and liftable armrests are connected to both sides of the chair body, the top of the support base is connected to the chair body through a support frame, one end of the support frame extends outward to form a support beam for installing the backrest, a lumbar pad is arranged at one end of the backrest close to the waist, the lumbar pad is connected to the support beam, and an elastic supporting part for supporting the waist is formed on the outer surface of the lumbar pad, an accommodating cavity is formed inside the lumbar pad, a lumbar support pad is arranged in the accommodating cavity, and a driving component for driving the lumbar support pad to extend and retract toward the elastic supporting part is connected in the accommodating cavity, a rotating shaft is connected to the driving component, and one end of the rotating shaft passes through the lumbar pad and is connected to an adjusting member.

[0007] In the above description, the waist pad is clamped and installed between the backrest and the chair body, and the side of the waist pad is connected to the support beam, and a support frame is arranged inside the waist pad. By providing the waist pad with a support frame, the stability and reliability of the waist pad are improved, and excessive deformation and loss are prevented.

[0008] Further in the above description, the driving assembly includes a mounting plate, a cam, a telescopic rod and a buffer member, the mounting plate is mounted on the inner wall of the accommodating cavity, the cam is connected to the mounting plate through a connecting sleeve, a support block and a guide block are provided on the mounting plate, one end of the telescopic rod passes through the support block and the guide block in sequence and contacts with the outer surface of the cam, the other end of the telescopic rod is connected to the lumbar support pad, and a connecting block for connecting the telescopic rod is provided on the side of the lumbar support pad.

[0009] The cam is set so that the telescopic rod can be driven to move along the surface of the cam, thereby controlling the telescopic rod cigarette support block and the guide block to move in a straight line, so that the waist support pad can be driven to extend and retract toward the elastic support part, so that the overall waist support can be adjusted conveniently. The set waist support pad increases the support area and the stability of the support.

[0010] Optionally, the buffer piece is sleeved on the telescopic rod so that one end of the buffer piece contacts the support block, thereby improving the stability and buffering effect of the telescopic rod.

[0011] Specifically, the buffer member is a return spring.

[0012] Further in the above description, the drive assembly is provided in two groups, and the two groups of drive assemblies are symmetrically distributed on both sides of the lumbar support pad, and one end of the rotating shaft passes through the two groups of drive assemblies and extends to the outside of the lumbar pad.

[0013] By installing two sets of driving components on both sides of the lumbar support pad respectively, the lumbar support pad can be driven to adjust the elastic support part telescopically at the same time, thereby improving the stability and reliability of the adjustment.

[0014] Further in the above description, a locking block is provided on the side of the lumbar pad, one end of the rotating shaft passes through the locking block and is connected to the adjusting member, a locking hole is opened on the locking block, a locking bolt is connected to the locking hole, and one end of the locking bolt passes through the locking hole and contacts the outer surface of the rotating shaft.

[0015] The locking bolt is arranged to lock and fix the rotating shaft, so that the rotating shaft is locked to prevent the rotating shaft from rotating and deviating.

[0016] Further in the above description, a silicone protective pad is bonded to the outer surface of the lumbar support pad, and a plurality of conductive heat dissipation holes are opened on the surface of the elastic support portion.

[0017] The elastic supporting effect of the elastic supporting part is improved by setting the silicone protective pad, and at the same time, the comfort of the waist support is improved. The heat dissipation holes opened on the elastic supporting part improve the ventilation and heat dissipation effects, which is convenient to use.

[0018] Further in the above description, a foot support ring is connected to the support base, and an anti-slip pad is provided on the foot support ring.

[0019] The beneficial effects of the utility model are as follows: by arranging a lumbar pad on the backrest part of the chair body, a retractable lumbar support pad is arranged inside the lumbar pad, and a corresponding driving component is equipped, the user can adjust it according to his own needs and comfort, and use a rotating shaft to connect the driving component and the adjusting part, so as to improve the convenience of adjusting the lumbar support, and the operating adjusting part can drive the driving component to work through the rotating shaft, so that it can control the retraction and expansion of the lumbar support pad to easily adjust the position of the lumbar support, thereby improving the adaptability of the seat, without the need for complex mechanical structures or additional tools to assist, greatly improving the convenience and efficiency of use, and setting the lumbar support to help relieve the waist fatigue and discomfort caused by long-term sitting, the elastic support part designed on the outer surface of the lumbar pad provides soft support for the waist, improves the overall sitting comfort, improves the stability and reliability of the support, improves the sitting comfort, and thus improves the practicality and durability of the seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional diagram of the first direction of this embodiment;

[0021] Figure 2 It is a three-dimensional diagram of the second direction of this embodiment;

[0022] Figure 3 is a cross-sectional view of this embodiment;

[0023] Figure 4 Schematic diagram of the structure of the driving component in this embodiment;

[0024] Figure 5 It is a schematic diagram of the local structure of this embodiment;

[0025] The reference numerals in the figure are: 1-support base, 2-chair body, 3-backrest, 4-support frame, 5-support beam, 6-lumbar pad, 7-elastic support part, 8-accommodating chamber, 9-lumbar support pad, 10-driving assembly, 101-mounting plate, 102-cam, 103-telescopic rod, 104-buffer, 105-connecting sleeve, 11-rotating shaft, 12-adjusting member, 13-support block, 14-guide block, 15-connecting block, 16-locking block, 17-locking bolt, 18-silicone protective pad, 19-heat dissipation hole, 20-foot support ring, 21-anti-slip pad. DETAILED DESCRIPTION

[0026] The present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0027] In this embodiment, refer to Figure 1-Figure 5 The specifically implemented chair for adjusting lumbar support comprises a support base 1 and a chair body 2 arranged on the support base 1, a backrest 3 is arranged on the chair body 2, and liftable armrests are connected to both sides of the chair body 2, the top of the support base 1 is connected to the chair body 2 through a support frame 4, one end of the support frame 4 extends outward to form a support beam 5 for installing the backrest 3, a lumbar pad 6 is arranged at one end of the backrest 3 close to the waist, the lumbar pad 6 is connected to the support beam, and an elastic support part 7 for supporting the waist is formed on the outer surface of the lumbar pad 6, an accommodating cavity 8 is formed inside the lumbar pad 6, a lumbar support pad 9 is arranged in the accommodating cavity 8, and a driving component 10 for driving the lumbar support pad 9 to extend and retract toward the elastic support part 7 is connected in the accommodating cavity 8, a rotating shaft 11 is connected to the driving component 10, and one end of the rotating shaft 11 passes through the lumbar pad 6 and is connected to an adjusting member 12.

[0028] The lumbar pad 6 is clamped and installed between the backrest 3 and the chair body 2, and the side of the lumbar pad 6 is connected to the support beam 5, and a support frame is provided inside the lumbar pad 6. By providing the lumbar pad 6 with the support frame, the stability and reliability of the lumbar pad 6 are improved, and excessive deformation and loss are prevented.

[0029] The driving assembly 10 includes a mounting plate 101, a cam 102, a telescopic rod 103 and a buffer 104. The mounting plate 101 is mounted on the inner wall of the accommodating chamber 8. The cam 102 is connected to the mounting plate 101 through a connecting sleeve 105. A support block 13 and a guide block 14 are provided on the mounting plate 101. One end of the telescopic rod 103 passes through the support block 13 and the guide block 14 in sequence and contacts the outer surface of the cam 102. The other end of the telescopic rod 103 is connected to the lumbar support pad 9. A connecting block 15 for connecting the telescopic rod 103 is provided on the side of the lumbar support pad 9.

[0030] The cam 102 is provided so that the telescopic rod 103 can be driven to move along the surface of the cam 102, so that the cigarette support block 13 and the guide block 14 of the telescopic rod 103 can be controlled to move linearly, so that the waist support pad 9 can be driven to extend and retract toward the elastic support part 7, so that the waist support can be adjusted as a whole. The waist support pad 9 increases the support area and the stability of the support. Specifically, the buffer 104 is provided to be sleeved on the telescopic rod 103, so that one end of the buffer 104 contacts the support block 13, thereby improving the stability and buffering effect of the telescopic rod 103. Specifically, the buffer 104 is a return spring.

[0031] Two sets of driving components 10 are provided, and the two sets of driving components 10 are symmetrically distributed on both sides of the waist support pad 9, and one end of the rotating shaft 11 passes through the two sets of driving components 10 and extends to the outside of the waist pad 6. The two sets of driving components 10 are respectively installed on both sides of the waist support pad 9, so that the waist support pad 9 can be driven to adjust the elastic support part 7 at the same time, thereby improving the stability and reliability of the adjustment.

[0032] A locking block 16 is provided on the side of the lumbar pad 6, one end of the rotating shaft 11 passes through the locking block 16 and is connected to the adjusting member 12, a locking hole is provided on the locking block 16, a locking bolt 17 is connected to the locking hole, one end of the locking bolt 17 passes through the locking hole and contacts the outer surface of the rotating shaft 11. The locking bolt 17 is provided to lock and fix the rotating shaft 11, so that the rotating shaft 11 is locked to prevent the rotating shaft 11 from rotating and deviating.

[0033] The outer surface of the waist support pad 9 near the elastic support part 7 is bonded with a silicone protective pad 18, and the surface of the elastic support part 7 is provided with a conductive heat dissipation hole 19. The silicone protective pad 18 is provided to improve the elastic support effect of the elastic support part 7, and at the same time, improve the comfort of the waist support, and the heat dissipation hole 19 provided on the elastic support part 7 improves the ventilation and heat dissipation effect, which is convenient to use.

[0034] A foot support ring 20 is connected to the support base 1 , and an anti-slip pad 21 is provided on the foot support ring 20 .

[0035] The specific control and adjustment process in this embodiment is as follows: the lumbar pad 6 is installed on the backrest 3 close to the waist, so that the lumbar pad 6 is installed with the support beam 5, and a retractable lumbar support pad 9 is arranged inside the lumbar pad 6, which is coaxially connected with the connecting shaft sleeve 105 through the rotating shaft 11, so that the rotating shaft 11 can be driven by the adjusting member 12 to be rotated and adjusted, so that the connecting shaft sleeve 105 connected to the rotating shaft 11 can drive the cam 102 to rotate along the rotating shaft 11, so that the cam 102 can make the telescopic rod 103 move along the outer side surface of the cam 102 under rotation, and when the highest point of the cam 102 contacts the end of the telescopic rod 103, the telescopic rod 103 moves linearly along the support block 13 and the guide block 14, thereby driving the lumbar support pad 9 to move toward the elastic support part 7, and the elastic support part 7 provided has an elastic The expansion effect can improve the supporting effect on the waist under the squeezing of the lumbar support pad 9, and the locking bolt 17 can prevent the cam 102 from rotating due to the locking shaft 11. Specifically, the end of the shaft 11 is provided with a rotation damper to prevent the self-rotation of the shaft 11, so that the user can adjust it according to their own needs and comfort. The position of the lumbar support can be easily adjusted by controlling the extension and contraction of the lumbar support pad 9, thereby improving the adaptability of the seat and greatly improving the convenience and efficiency of use. The silicone protective pad 18 and the elastic support part 7 designed on the outer surface of the lumbar pad 6 provide soft support for the waist, improve the overall sitting comfort, improve the stability and reliability of the support, improve the sitting comfort, thereby improving the practicality and durability of the seat.

[0036] The above is only a preferred embodiment of the utility model, and does not limit the utility model in any form. Although the utility model is disclosed as a preferred embodiment as above, it is not used to limit the utility model. Any technician familiar with this profession can make some changes or modifications to equivalent embodiments of equivalent changes by using the technical content disclosed above without departing from the scope of the technical solution of the utility model. However, any simple modification, equivalent change and modification made to the above embodiments according to the technology of the utility model, which does not depart from the content of the technical solution of the utility model, belongs to the scope of the technical solution of the utility model.

Claims

1. A chair with adjustable lumbar support, comprising a support base and a chair body arranged on the support base, a backrest being arranged on the chair body, and liftable armrests being connected to both sides of the chair body, characterized in that: The top of the support base is connected to the chair body through a support frame, one end of the support frame extends outward to form a support beam for installing a backrest, a lumbar pad is provided at the end of the backrest close to the waist, the lumbar pad is connected to the support beam, and an elastic supporting part for supporting the waist is formed on the outer surface of the lumbar pad, an accommodating cavity is formed inside the lumbar pad, a lumbar support pad is provided in the accommodating cavity, and a driving component for driving the lumbar support pad to extend and retract toward the elastic supporting part is connected in the accommodating cavity, a rotating shaft is connected to the driving component, and one end of the rotating shaft passes through the lumbar pad and is connected to an adjusting part.

2. The seat with easily adjustable lumbar support according to claim 1, characterized in that: The waist pad is clamped and installed between the backrest and the chair body, and the side of the waist pad is connected with the support beam, and a support frame is arranged inside the waist pad.

3. The chair with easily adjustable lumbar support according to claim 1, characterized in that: The driving assembly includes a mounting plate, a cam, a telescopic rod and a buffer. The mounting plate is mounted on the inner wall of the accommodating cavity. The cam is connected to the mounting plate through a connecting sleeve. A support block and a guide block are provided on the mounting plate. One end of the telescopic rod passes through the support block and the guide block in sequence and contacts the outer surface of the cam. The other end of the telescopic rod is connected to the lumbar support pad. A connecting block for connecting the telescopic rod is provided on the side of the lumbar support pad.

4. The chair with easily adjustable lumbar support according to claim 3, characterized in that: The drive components are provided in two groups, and the two groups of drive components are symmetrically distributed on both sides of the lumbar support pad, and one end of the rotating shaft passes through the two groups of drive components and extends to the outside of the lumbar pad.

5. The chair with easily adjustable lumbar support according to claim 4, characterized in that: A locking block is arranged on the side of the lumbar pad, one end of the rotating shaft passes through the locking block and is connected to the adjusting member, a locking hole is opened on the locking block, a locking bolt is connected to the locking hole, and one end of the locking bolt passes through the locking hole and contacts the outer surface of the rotating shaft.

6. The chair with easily adjustable lumbar support according to any one of claims 1 to 5, characterized in that: A silicone protective pad is bonded to the outer surface of the waist support pad, and a plurality of conductive heat dissipation holes are opened on the surface of the elastic support part.

7. The chair with easily adjustable lumbar support according to any one of claims 1 to 5, characterized in that: The support base is connected with a foot support ring, and the foot support ring is provided with an anti-skid pad.

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