Office chair with waist rest adjusting device

Abstract

The invention provides an office chair with a waist rest adjusting device, and relates to the technical field of office chairs, the office chair comprises a chair seat, chair legs arranged at the bottom of the chair seat, a chair back arranged on one side of the chair seat, and a waist rest mechanism arranged on one side, close to a human body, of the chair back; one side of the bottom of the chair seat is movably connected with the chair back through a lifting component; the waist leaning mechanism is composed of a first waist leaning part and a second waist leaning part. The first waist rest part is connected with the chair back; the second waist rest part is movably connected with the first waist rest part; a waist cushion is arranged on the side, away from the first waist leaning part, of the second waist leaning part, and protection plates are arranged on the two sides of the waist cushion; through the arrangement of the first waist rest part and the second waist rest part, a user can obtain the position most suitable for the waist curve and the supporting requirement of the user, waist fatigue and damage are reduced, and therefore the lumbar vertebra pressure is relieved.

Description

Technical Field

[0001] The invention relates to the technical field of office chairs, in particular to an office chair with a lumbar support adjusting device. Background Art

[0002] In modern office environments, people tend to sit in office chairs for a long time while working. Since the sitting posture is maintained for a long time, if the design of the office chair is unreasonable, it will not provide effective lumbar support and a comfortable experience, which can easily cause problems such as lumbar fatigue, pain, and even spinal injuries.

[0003] The lumbar support of some traditional office chairs is fixed and cannot be adjusted according to the body shape and needs of different users, resulting in poor lumbar support. At the same time, the complex structural design of the lumbar support components not only increases the production cost, but also easily fails during use, affecting the normal use and service life of the chair. In addition, although the remaining part has a simple adjustment function, the adjustment method is not flexible and accurate enough, and it is difficult to meet the user's personalized requirements for lumbar support. In addition, the existing office chairs are not convenient enough in terms of seat and back lifting and adjustment, and the stability needs to be improved. Summary of the invention

[0004] The purpose of the present invention is to provide an office chair with a lumbar adjustment device to solve the technical problems existing in the prior art.

[0005] In order to achieve the above-mentioned object of the invention, the technical solution adopted by the present invention is:

[0006] An office chair with a lumbar support adjustment device comprises: a seat, chair legs arranged at the bottom of the seat, a chair back arranged at one side of the seat, and a lumbar support mechanism arranged at the side of the chair back close to the human body; one side of the seat bottom is movably connected to the chair back through a lifting component; the lumbar support mechanism consists of a first lumbar support component and a second lumbar support component; the first lumbar support component is connected to the chair back; the second lumbar support component is movably connected to the first lumbar support component; a lumbar pad is provided on the side of the second lumbar support component away from the first lumbar support component, and guard plates are provided on both sides of the lumbar pad.

[0007] Furthermore, the lifting component includes: a first worm, a transmission shaft connected to the first worm, a rotating shaft connected to the transmission shaft, a sleeve threadedly connected to the rotating shaft, and a connecting plate arranged on one side of the sleeve; a handle is provided at one end of the first worm; the two ends of the transmission shaft are respectively sleeved with a first worm wheel and a second driven gear, and the first worm wheel and the first worm are meshed with each other; the transmission shaft outer sleeve is sleeved with a first driven gear, and the first driven gear and the second driven gear are meshed with each other; one side of the connecting plate is fixedly connected to the chair back.

[0008] Furthermore, the first lumbar support component includes: a supporting structure, a receiving shell slidably connected to the supporting structure, a limiting component provided inside the receiving shell, and a handle penetrating one side of the receiving shell; sliding grooves are provided on both sides of the receiving shell, and the sliding grooves are slidably connected to the receiving shell; a plurality of partitions are provided in the supporting structure, and the partitions are against the limiting component; the limiting component is connected to one end of the handle.

[0009] Furthermore, the limiting component includes: a base, a connecting column connected to the base, a connecting head arranged at the telescopic end of the connecting column, and a limiting block movably connected to the connecting head; the base is arranged inside the receiving shell and is connected to the connecting head through the connecting column, and the outer sleeve of the connecting column is connected to a reset spring; the connecting head is connected to the limiting block through a one-way pin shaft, and the limiting block is against the partition.

[0010] Furthermore, the second lumbar support component includes: a telescopic shell slidably connected to the inside of the receiving shell, a second worm screw arranged in the receiving shell, a second worm wheel meshing with the second worm screw, a connecting sleeve fixedly connected to the telescopic shell, and a control disk passing through the connecting sleeve; the control disk is connected to the second worm wheel via a connecting shaft, and the connecting shaft passes through the connecting sleeve.

[0011] Furthermore, the telescopic end of the telescopic shell is connected to the waist pad, the waist pad is connected to the telescopic shell through a pin shaft, and an elastic plate is provided inside the waist pad, and the waist pad is movably connected to the guard plate through a connecting piece.

[0012] Furthermore, the seat is movably connected to the chair legs through a gas pressure rod, and armrests are symmetrically provided on both sides; and a pillow is provided on the top of the chair back.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] (i) The present invention provides a first lumbar support component and a second lumbar support component. When in use, the height is adjusted by the first lumbar support component, and then the distance that is most suitable for the user is adjusted by the second lumbar support component. The lumbar pad and the guard plate are combined to support the waist, so that the user can obtain a position that best suits his or her waist curve and support requirements, reduce waist fatigue and injury, and thus relieve lumbar pressure;

[0015] (ii) The first lumbar support component and the second lumbar support component of the present invention have a simple structure and are easy to use. They can be flexibly adjusted only by a handle and a control panel. They have a low manufacturing cost and are easy to maintain.

[0016] (III) The present invention can select a suitable seat height according to the different body shapes of users through the arrangement of the lifting components and the gas pressure rod, thereby further improving the comfort of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A perspective view of the present invention;

[0018] Figure 2 is a side view of the present invention;

[0019] Figure 3 It is an enlarged view of part A of the present invention;

[0020] Figure 4 It is a schematic diagram of the internal structure of the lifting component of the present invention;

[0021] Figure 5 It is a schematic diagram of the connection between the first waist support component and the second waist support component of the present invention;

[0022] Figure 6 It is a schematic diagram of the internal structure of the first lumbar support component of the present invention;

[0023] Figure 7 It is a schematic diagram of the internal structure of the second lumbar support component of the present invention;

[0024] Figure 8 It is an enlarged view of part B of the present invention;

[0025] In the figure: 1, seat; 2, chair legs; 3, gas pressure rod; 4, chair back; 5, armrest; 6, pillow; 7, lifting component; 701, first worm; 702, handle; 703, transmission shaft; 704, first driven gear; 705, second driven gear; 706, rotating shaft; 707, sleeve; 708, connecting plate; 709, first worm gear; 8, first lumbar support component; 801, supporting structure; 802, partition; 803, limiting component; 804, first worm gear; 805, second driven gear; 806, rotating shaft; 807, sleeve; 808, connecting plate; 809, first worm gear ... 031. Base; 8032. Connecting column; 8033. Return spring; 8034. Connecting head; 8035. Limiting block; 8036. One-way pin; 804. Handle; 805. Receiving shell; 9. Second lumbar support component; 901. Telescopic shell; 902. Second worm; 903. Second worm gear; 904. Connecting sleeve; 905. Control panel; 10. Lumbar pad; 11. Guard plate; 12. Pin; 13. Connecting piece; 14. Elastic plate. DETAILED DESCRIPTION

[0026] In order to make the content of the present invention more clearly understood, the technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. The same parts are represented by the same figure marks. It should be noted that the words "front", "rear", "left", "right", "up" and "down" used in the following description refer to the directions in the drawings, and the words "inside" and "outside" refer to the directions toward or away from the geometric center of a specific component, respectively.

[0027] like Figure 1-2 As shown, in this embodiment, an office chair with a lumbar support adjustment device is provided, comprising: a seat 1, a chair leg 2 arranged at the bottom of the seat 1, a chair back 4 arranged at one side of the seat 1, and a lumbar support mechanism arranged at the side of the chair back 4 close to the human body; one side of the bottom of the seat 1 is movably connected to the chair back 4 through a lifting component 7; the lumbar support mechanism is composed of a first lumbar support component 8 and a second lumbar support component 9, the first lumbar support component 8 is used for height adjustment, and the second lumbar support component 9 is used for length adjustment; the first lumbar support component 8 is connected to the chair back 4; the second lumbar support component 9 is movably connected to the first lumbar support component 8; A lumbar pad 10 is provided on the side of the second lumbar support component 9 away from the first lumbar support component 8, and the lumbar pad 10 is made of a flexible material, such as memory foam, latex or polyester fiber; it can increase the softness and cushioning effect of the lumbar pad 10, and further improve the comfort of the device; guard plates 11 are provided on both sides of the lumbar pad 10, and the guard plates 11 are made of engineering plastics and have predetermined flexibility and decorativeness; the seat 1 is movably connected to the chair legs 2 through a pneumatic rod 3, and armrests 5 are symmetrically provided on both sides thereof. The setting of the pneumatic rod 3 enables the device to better adapt to users of different body shapes; a pillow 6 is provided on the top of the chair back 4.

[0028] like Figure 3-4 As shown, further, the lifting component 7 includes: a first worm 701, a transmission shaft 703 connected to the first worm 701, a rotating shaft 706 connected to the transmission shaft 703, a sleeve 707 threadedly connected to the rotating shaft 706, and a connecting plate 708 arranged on one side of the sleeve 707; a handle 702 is provided at one end of the first worm 701, and when in use, the user drives the first worm 701 to rotate by rotating the handle 702; the first worm wheel 709 and the second driven gear 705 are respectively sleeved at both ends of the transmission shaft 703, and the working sizes of the first worm wheel 709 and the second driven gear 705 are adapted to each other; the first worm wheel 709 and the first worm 701 are meshed with each other; the The transmission shaft 703 is outer-engaged with the first driven gear 704, and the first driven gear 704 and the second driven gear 705 are meshed with each other; one side of the connecting plate 708 is fixedly connected to the chair back 4; during operation, the user rotates the handle 702, the handle 702 drives the first worm 701 to rotate, the first worm 701 drives the first worm wheel 709 to rotate, the first worm wheel 709 drives the second driven gear 705 and the transmission shaft 703 to rotate, because the first driven gear 704 and the second driven gear 705 are meshed with each other, at this time, the first driven gear 704 drives the rotating shaft 706 to rotate, thereby, the rotating shaft 706 drives the sleeve 707 to move up and down, and the sleeve 707 drives the chair back 4 to adjust its height through the connecting plate 708.

[0029] like Figure 5-6As shown, further, the first lumbar support component 8 includes: a supporting structure 801, a receiving shell 805 slidably connected to the supporting structure 801, a limiting component 803 is arranged inside the receiving shell 805, and a handle 804 is arranged on one side of the receiving shell 805; one side of the receiving shell 805 is open, and slide grooves are arranged on both sides, and the slide grooves are slidably connected to the receiving shell 805; a plurality of partitions 802 are arranged in the supporting structure 801, and the partitions 802 are adapted to the working size of the receiving shell 805, and the partitions 802 are abutted against the limiting component 803, so as to fix the receiving shell 805; the limiting component 803 is connected to one end of the handle 804; when working, the limiting component 803 is driven to engage with the partition 802 by pulling the handle 804, so as to achieve height adjustment.

[0030] like Figure 5-6 As shown, specifically, the limiting component 803 includes: a base 8031, a connecting column 8032 connected to the base 8031, a connecting head 8034 arranged at the telescopic end of the connecting column 8032, and a limiting block 8035 movably connected to the connecting head 8034; the base 8031 ​​is arranged inside the receiving shell 805, and is connected to the connecting head 8034 through the connecting column 8032, the connecting column 8032 has a preset elasticity, the outer shell of the connecting column 8032 is connected to a return spring 8033, and the two ends of the return spring 8033 are respectively connected to the base 8031 ​​and the connecting head 8034; the connecting head 8034 is connected to the limiting block 8035 through a one-way pin 8036 Connection, the one-way pin 8036 has a preset elasticity, and after rotation, it automatically resets when the external force disappears. It can only realize clockwise rotation, and it is a prior art, so it will not be described in detail here; the limit block 8035 is against the partition 802; when working, the user pulls the handle 804 upwards, and the handle 804 drives the connecting head 8034 to move upward. At this time, the connecting column 8032 and the reset spring 8033 are squeezed, whereby the limit block 8035 moves upward and contacts the upper partition 802. Due to the setting of the one-way pin 8036, during the upward movement, the limit block 8035 rotates until the one-way pin 8036 is reset and against the upper partition 802, thereby realizing height adjustment.

[0031] like Figure 7As shown, further, when the second lumbar support component 9 includes: a telescopic shell 901 slidably connected to the inside of the receiving shell 805, a second worm 902 arranged in the receiving shell 805, a second worm wheel 903 meshing with the second worm 902, a connecting sleeve 904 fixedly connected to the telescopic shell 901, and a control disk 905 passing through the connecting sleeve 904; the control disk 905 is connected to the second worm wheel 903 through a connecting shaft, and the connecting shaft passes through the connecting sleeve 904; when working, the connecting shaft and the second worm wheel 903 are driven to rotate by screwing the control disk 905. At this time, the second worm wheel 903 and the second worm 902 are meshing with each other. Since the connecting sleeve 904 is fixedly connected to the telescopic shell 901, when the second worm wheel 903 and the second worm 902 rotate, the position of the telescopic shell 901 is moved.

[0032] like Figure 8 As shown, further, the telescopic end of the telescopic shell 901 is connected to the lumbar pad 10, and the lumbar pad 10 is connected to the telescopic shell 901 through a pin shaft 12, and has an elastic plate 14 inside, and the lumbar pad 10 is movably connected to the guard plate 11 through a connecting piece 13; when working, after the first lumbar support component 8 and the second lumbar support component 9 are adjusted to an appropriate height and a distance from the lumbar spine, the user leans the lumbar spine against the lumbar pad 10, and at this time, the guard plates 11 on both sides support the two sides of the lumbar spine, so that the user can obtain the position that best suits his or her lumbar curve and support needs, reduce lumbar fatigue and injury, and thus relieve lumbar pressure.

[0033] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. An office chair with a lumbar adjustment device, characterized in that: include: A chair seat (1), a chair leg (2) arranged at the bottom of the chair seat (1), a chair back (4) arranged at one side of the chair seat (1), and a lumbar support mechanism arranged at the side of the chair back (4) close to the human body; one side of the bottom of the chair seat (1) is movably connected to the chair back (4) via a lifting component (7); the lumbar support mechanism consists of a first lumbar support component (8) and a second lumbar support component (9); the first lumbar support component (8) is connected to the chair back (4); the second lumbar support component (9) is movably connected to the first lumbar support component (8); a lumbar pad (10) is provided on the side of the second lumbar support component (9) away from the first lumbar support component (8), and guard plates (11) are provided on both sides of the lumbar pad (10).

2. The office chair with a lumbar adjustment device according to claim 1, characterized in that: The lifting component (7) comprises: a first worm (701), a transmission shaft (703) connected to the first worm (701), a rotating shaft (706) connected to the transmission shaft (703), a sleeve (707) threadedly connected to the rotating shaft (706), and a connecting plate (708) arranged on one side of the sleeve (707); a handle (702) is provided at one end of the first worm (701); the two ends of the transmission shaft (703) are respectively sleeved with a first worm wheel (709) and a second driven gear (705), and the first worm wheel (709) and the first worm (701) are meshed with each other; the outer shell of the transmission shaft (703) is sleeved with a first driven gear (704), and the first driven gear (704) and the second driven gear (705) are meshed with each other; one side of the connecting plate (708) is fixedly connected to the chair back (4).

3. The office chair with lumbar adjustment device according to claim 1, characterized in that: The first lumbar support component (8) comprises: a supporting structure (801), a receiving shell (805) slidably connected to the supporting structure (801), a limiting component (803) is arranged inside the receiving shell (805), and a handle (804) is arranged on one side of the receiving shell (805); sliding grooves are arranged on both sides of the receiving shell (805), and the sliding grooves are slidably connected to the receiving shell (805); a plurality of partitions (802) are arranged inside the supporting structure (801), and the partitions (802) are abutted against the limiting component (803); the limiting component (803) is connected to one end of the handle (804).

4. The office chair with lumbar adjustment device according to claim 3, characterized in that: The limiting component (803) includes: a base (8031), a connecting column (8032) connected to the base (8031), a connecting head (8034) arranged at the telescopic end of the connecting column (8032), and a limiting block (8035) movably connected to the connecting head (8034); the base (8031) is arranged inside the receiving shell (805) and is connected to the connecting head (8034) through the connecting column (8032), and the outer shell of the connecting column (8032) is connected to the return spring (8033); the connecting head (8034) is connected to the limiting block (8035) through a one-way pin shaft (8036), and the limiting block (8035) is against the partition (802).

5. The office chair with a lumbar adjustment device according to claim 3, characterized in that: The second lumbar support component (9) comprises: a telescopic shell (901) slidably connected to the inside of the receiving shell (805), a second worm (902) arranged in the receiving shell (805), a second worm wheel (903) meshing with the second worm (902), a connecting sleeve (904) fixedly connected to the telescopic shell (901), and a control disk (905) passing through the connecting sleeve (904); the control disk (905) is connected to the second worm wheel (903) via a connecting shaft, and the connecting shaft passes through the connecting sleeve (904).

6. The office chair with lumbar adjustment device according to claim 5, characterized in that: The telescopic end of the telescopic shell (901) is connected to the waist pad (10), and the waist pad (10) is connected to the telescopic shell (901) via a pin shaft (12) and has an elastic plate (14) inside. The waist pad (10) is movably connected to the guard plate (11) via a connecting piece (13).

7. The office chair with a lumbar adjustment device according to claim 1, characterized in that: The seat (1) is movably connected to the chair legs (2) via a pneumatic rod (3), and armrests (5) are symmetrically arranged on both sides thereof; a cushion (6) is arranged on the top of the chair back (4).

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