Office chair backrest structure with adjustable waist support position

Abstract

The utility model provides an office chair backrest structure with an adjustable waist support position, which relates to the technical field of office chairs and comprises a main body mechanism, a plurality of positioning mechanisms, a control mechanism and a waist support mechanism. Before use, people adjust the height of the waist support mechanism through the positioning mechanism, then adjust the sitting posture to make the waist contact with the waist support mechanism, then press a button to start an air feed pump, and air is fed into a control valve shell through an air pipeline, pushes a piston to rise and then enters an air bag, so that the air bag is expanded and accurately fits the waist curve of a user; local compression or suspension of the waist is avoided, fatigue caused by long-time sitting is effectively relieved, the burden of intervertebral discs and muscles is reduced, occupational diseases such as lumbar disc herniation and lumbar muscle strain are prevented, when the air bag is tightly attached to the waist and cannot continue to expand, air accumulated in the control valve shell pushes the piston to further ascend, contacts make contact to form a circuit, and the air bag is prevented from being blocked. The air supply pump is automatically closed, excessive extrusion on the waist is prevented, and errors caused by manual operation are effectively avoided through automatic adjustment.

Description

Technical Field

[0001] This utility model relates to the field of office chair technology, and in particular to an office chair backrest structure with adjustable lumbar support position. Background Technology

[0002] An office chair is a type of seat specifically designed for office settings. It aims to provide users with comfortable and healthy posture support during long hours of work, thereby improving work efficiency and reducing physical fatigue and injury.

[0003] Currently, most office chairs on the market are equipped with lumbar supports. However, the shape of these lumbar supports is usually fixed and cannot be flexibly adjusted according to the different body characteristics of different users. This may lead to some users experiencing a situation where the lumbar support does not fit their own lumbar curve, resulting in insufficient support or discomfort due to pressure on the lower back. Long-term use of such a lumbar support that does not match the lumbar curve can easily cause physical fatigue. If the support angle provided by the lumbar support is incorrect, it may further increase the pressure on the lumbar spine, ultimately inducing or aggravating lumbar muscle strain, herniated discs and other lumbar health problems. Utility Model Content

[0004] The purpose of this utility model is to solve the problem that the shape of the lumbar support cannot be changed during the use of the above-mentioned equipment, which increases user fatigue and causes health problems. Therefore, this utility model proposes an adjustable lumbar support backrest structure for office chairs.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: an adjustable lumbar support backrest structure for an office chair, comprising: a main body mechanism, multiple positioning mechanisms, a control mechanism, and a lumbar support mechanism;

[0006] The main structure, serving as the primary installation and support structure, is used to provide support for the foundation.

[0007] Multiple positioning mechanisms are installed on one side of the outer wall of the main body to fix the lumbar support after the position is adjusted;

[0008] The control mechanism, installed at the bottom of the main structure, provides the air required for the device to deform;

[0009] The lumbar support mechanism is fixedly connected to the output end of the control mechanism. By injecting air, it can perfectly fit the user's waist.

[0010] The lumbar support mechanism includes a back plate, a set of heaters is provided on one side of the outer wall of the back plate, an airbag is adhered to one side of the outer wall of the back plate, a protective sleeve is movably fitted on the outer wall of the airbag, and an exhaust valve is fixedly connected to the output end of the back plate.

[0011] Before using the work chair, the user first adjusts the height of the lumbar support mechanism via the positioning mechanism. Then, the user adjusts their sitting posture so that their lower back contacts the lumbar support mechanism. The control mechanism then activates, delivering the generated gas into the backrest. The air inflates the airbag, making it fit snugly against the user's lower back, thus precisely conforming to the user's lumbar curve and providing personalized support. This avoids localized pressure or a feeling of being unsupported due to a fixed shape, effectively relieving fatigue from prolonged sitting and reducing the burden on the intervertebral discs and muscles. The deformable lumbar support helps prevent occupational diseases such as lumbar disc herniation and lumbar muscle strain. After the heater is activated, the heat stimulates the expansion of blood vessels in the lower back, accelerating blood flow and relieving stiffness and soreness in the lower back caused by prolonged sitting or cold environments. The protective cover absorbs sweat and friction, reducing wear on the lumbar support surface and lowering cleaning and maintenance costs. The exhaust valve automatically opens when the device malfunctions, causing excessive air pressure inside the airbag, thereby expelling internal air and preventing the airbag from rupturing.

[0012] Preferably, two magnetic clasps are adhered to one side of the outer wall of the back panel, and one side of the outer wall of each of the two magnetic clasps is magnetically connected to one side of the outer wall of the magnetic strip. Two shoulder straps are provided on the outer wall of the back panel, and each shoulder strap has a set of positioning holes. The inner surface of one of the positioning holes is movably inserted into the outer wall of the positioning post. Velcro closures are adhered to the outer walls of both shoulder straps, and the outer walls of both Velcro closures are in contact with the outer walls of the Velcro hooks. When the user needs to adjust the height of the lumbar support mechanism, they only need to place the back panel at the designated height. At this time, the magnetic clasps on the back of the back panel will be attracted by the magnetic strip, thus achieving initial fixation of the relevant structure. Then, the Velcro closures on the shoulder straps are attached to the Velcro hooks to further reinforce the lumbar support mechanism. Finally, both shoulder straps are placed on the outer walls of the positioning post to complete the position adjustment of the lumbar support mechanism, thereby accurately matching the user's lumbar physiological curvature and preventing the lumbar support from being too high and compressing the ribs or too low and becoming ineffective.

[0013] Preferably, the main body includes a base, a set of casters is fixedly installed at the bottom of the base, a telescopic rod is fixedly installed at the top of the base, a seat is fixedly installed at the top of the telescopic rod, two armrests and a backrest are fixedly installed on the outer wall of the seat, two magnetic strips and Velcro hooks are attached to the outer wall of the backrest, and a button is provided at the bottom of the seat. The casters facilitate the user's movement of the chair, and the button serves as the activation device for the electronic mechanism, making it convenient for the user to use.

[0014] Preferably, the positioning mechanism includes a positioning post, the outer wall of which is fixedly connected to the outer wall of the backrest. Each outer wall of the positioning post has two mounting slots. A set of springs is fixedly installed on one side of the inner wall of each of the two mounting slots. A locking block is fixedly installed between the outer walls of the two sets of springs. The inner walls of the two mounting slots are movably inserted into the outer walls of the locking blocks. When the shoulder strap is placed on the surface of the positioning post, it first contacts the inclined surface at the top of the locking block, thereby pushing the locking block to compress the springs and retract into the mounting slots. When the shoulder strap reaches the top of the positioning post, the compressed springs begin to extend, pushing the locking block forward. At this time, the flat surface at the bottom of the locking block contacts the shoulder strap, thereby locking it in place and preventing the support effect from failing due to lumbar support displacement.

[0015] Preferably, the control mechanism includes an air pump, the top of which is fixedly connected to the bottom of the seat plate, the output end of which is fixedly connected to a gas pipe, and the output end of which is fixedly connected to a control valve housing. The outer wall of the control valve housing is inserted into the back plate. When the air pump is started, it will draw in outside air and send it into the control valve housing through the gas pipe to control the deformation of the lumbar support.

[0016] Preferably, a mounting base is fixedly inserted into the inner wall of the control valve housing, a second spring is fixedly installed at the bottom of the mounting base, a piston is fixedly installed at the bottom of the second spring, a sealing ring is movably fitted onto the outer wall of the piston, and the outer wall of the sealing ring is fixedly inserted into the inside of the control valve housing. A first contact is provided on the inner wall of the control valve housing, and a second contact is provided on the outer wall of the piston. After air enters the inside of the control valve housing, it first pushes the piston upward and draws it out from the sealing ring. Then, the air flows through the gaps between the relevant structures and enters the airbag, causing it to inflate. When the airbag fits against the user's waist, it will be difficult to continue inflating due to the pressure on the waist. At this time, as air accumulates inside the control valve housing, the impact force of the airflow also increases, thereby pushing the piston to rise further, causing the second contact on the piston surface to contact the first contact, thus forming a circuit and shutting off the air pump. This avoids excessive pressure on the user's waist from the lumbar support, accurately distributes the pressure on the lumbar spine, and effectively reduces human error.

[0017] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0018] 1. In this utility model, before use, people adjust the height of the lumbar support mechanism through the positioning mechanism, then adjust their sitting posture so that their waist is in contact with it, and then press the button to start the air pump. Air is sent into the control valve housing through the gas pipe, pushing the piston up and entering the airbag, causing it to expand and precisely fit the user's waist curve, avoiding local compression or suspension of the waist, effectively relieving fatigue from prolonged sitting, while reducing the burden on the intervertebral discs and muscles, and preventing occupational diseases such as lumbar disc herniation and lumbar muscle strain. When the airbag is tightly fitted to the waist and can no longer expand, the air accumulated in the control valve housing will push the piston up further, causing the contacts to make contact and form a circuit, automatically shutting off the air pump, preventing excessive compression of the waist. Through automatic adjustment, errors caused by manual operation are effectively avoided. Attached Figure Description

[0019] Figure 1 This utility model provides a perspective view of the main structure of the backrest of an office chair with adjustable lumbar support.

[0020] Figure 2 A side view of the main structure of the backrest of an office chair with adjustable lumbar support is provided for this utility model.

[0021] Figure 3 This utility model provides a bottom-view perspective view of the main structure and control mechanism of the backrest structure of an office chair with adjustable lumbar support.

[0022] Figure 4 This utility model provides an enlarged view of structure A in an adjustable lumbar support backrest structure for an office chair.

[0023] Figure 5 This utility model provides a plan view of the main structure, control mechanism, and lumbar support mechanism in the backrest structure of an office chair with adjustable lumbar support position;

[0024] Figure 6 A sectional perspective view of the control mechanism in the backrest structure of an office chair with adjustable lumbar support is provided for this utility model.

[0025] Figure 7 This utility model provides a perspective view of the main structure, control mechanism, and lumbar support mechanism in the backrest structure of an office chair with adjustable lumbar support position.

[0026] Figure 8 This utility model presents a top perspective view of the main structure, control mechanism, and lumbar support mechanism of an office chair backrest structure with adjustable lumbar support position.

[0027] Legend:

[0028] 1. Main body mechanism; 101. Base; 102. Casters; 103. Telescopic rod; 104. Seat; 105. Armrest; 106. Backrest; 107. Magnetic strip; 108. Velcro hook; 109. Button; 2. Positioning mechanism; 201. Positioning post; 202. Mounting slot; 203. Spring 1; 204. Locking block; 3. Control mechanism; 301. Air pump; 302. Gas pipeline; 303. Control valve housing; 304. Mounting base; 305. Spring 2; 306. Piston; 307. Sealing ring; 308. Contact 1; 309. Contact 2; 4. Lumbar support mechanism; 401. Back panel; 402. Heater; 403. Airbag; 404. Protective cover; 405. Exhaust valve; 406. Magnetic suction piece; 407. Shoulder strap; 408. Positioning hole; 409. Velcro velvet surface. Detailed Implementation

[0029] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0030] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0031] Please see Figures 1-8 This utility model provides a technical solution: an adjustable lumbar support backrest structure for office chairs, comprising: a main body mechanism 1, multiple positioning mechanisms 2, a control mechanism 3, and a lumbar support mechanism 4;

[0032] Main structure 1, as the main installation and support structure, is used to realize the support function of the foundation;

[0033] Multiple positioning mechanisms 2 are installed on one side of the outer wall of the main body 1 to fix the lumbar support after the position is adjusted;

[0034] The control mechanism 3, installed at the bottom of the main body 1, provides the air required for the device to deform;

[0035] The lumbar support mechanism 4 is fixedly connected to the output end of the control mechanism 3. By injecting air, it can perfectly fit the user's waist.

[0036] The lumbar support mechanism 4 includes a back plate 401, a set of heaters 402 is provided on one side of the outer wall of the back plate 401, an airbag 403 is attached to one side of the outer wall of the back plate 401, a protective sleeve 404 is movably sleeved on the outer wall of the airbag 403, and an exhaust valve 405 is fixedly connected to the output end of the back plate 401.

[0037] Before using the work chair, the user first adjusts the height of the lumbar support mechanism 4 through the positioning mechanism 2, and then adjusts the sitting posture so that the waist is in contact with the lumbar support mechanism 4. Then the control mechanism 3 is activated, and the generated gas is delivered to the back panel 401. The air then inflates the airbag 403, making it fit tightly against the user's waist, thus precisely conforming to the user's waist curve and providing personalized support. This avoids local pressure or a feeling of being unsupported caused by a fixed shape, effectively relieving fatigue from prolonged sitting and reducing the burden on the intervertebral discs and muscles. The deformable lumbar support helps prevent occupational diseases such as lumbar disc herniation and lumbar muscle strain. After the heater 402 is activated, it dilates the blood vessels in the waist through heat stimulation, accelerates blood flow, and relieves stiffness and soreness in the waist caused by prolonged sitting or cold environments. The protective cover 404 can absorb sweat and friction, reduce wear on the surface of the lumbar support, and reduce cleaning and maintenance costs. The exhaust valve 405 will automatically open when the device malfunctions and the internal air pressure of the airbag 403 is too high, thereby venting the internal air and preventing the airbag 403 from rupturing.

[0038] like Figure 4 , Figure 5 , Figure 7 as well as Figure 8 As shown, two magnetic pieces 406 are adhered to one side of the outer wall of the back plate 401. One side of the outer wall of each magnetic piece 406 is magnetically connected to one side of the outer wall of the magnetic strip 107. Two shoulder straps 407 are provided on the outer wall of the back plate 401. Each shoulder strap 407 has a set of positioning holes 408 on its outer wall. The inner surface of one of the positioning holes 408 is movably inserted into the outer wall of the positioning post 201. Hook and loop fasteners 409 are adhered to the outer walls of both shoulder straps 407. The outer walls of both hook and loop fasteners 409 are in contact with the outer walls of the hook and loop hook surfaces 108, so that... When the user needs to adjust the height of the lumbar support mechanism 4, simply place the back panel 401 at the designated height. At this time, the magnetic strip 406 on the back of the back panel 401 will be attracted by the magnetic strip 107, thereby achieving initial fixation of the relevant structure. Then, attach the Velcro velvet side 409 on the shoulder strap 407 to the Velcro hook side 108 to further reinforce the lumbar support mechanism 4. Finally, put both shoulder straps 407 on the outer wall of the positioning post 201 to complete the position adjustment of the lumbar support mechanism 4, thereby accurately matching the user's lumbar physiological curvature and avoiding the lumbar support from being too high and compressing the ribs or too low and losing its function.

[0039] like Figures 1-3 as well as Figure 5 , Figure 7 as well as Figure 8As shown, the main body 1 includes a base 101, a set of casters 102 fixedly installed at the bottom of the base 101, a telescopic rod 103 fixedly installed at the top of the base 101, a seat 104 fixedly installed at the top of the telescopic rod 103, two armrests 105 and a backrest 106 fixedly installed on the outer wall of the seat 104, two magnetic strips 107 and Velcro hooks 108 are attached to the outer wall of the backrest 106, and a button 109 is provided at the bottom of the seat 104. The casters 102 facilitate the user to move the chair, and the button 109 serves as the activation device for the electronic mechanism, making it convenient for the user to use.

[0040] like Figure 1 , Figure 2 , Figure 4 as well as Figures 7-8 As shown, the positioning mechanism 2 includes a positioning post 201. The outer wall of the positioning post 201 is fixedly connected to the outer wall of the backing plate 106. The outer wall of the positioning post 201 has two mounting slots 202. A set of springs 203 is fixedly installed on one side of the inner wall of each of the two mounting slots 202. A locking block 204 is fixedly installed between the outer walls of the two sets of springs 203. The inner wall of each mounting slot 202 is movably inserted into the outer wall of the locking block 204. When the shoulder strap 407 is placed on the surface of the positioning post 201, it will first contact the inclined surface at the top of the locking block 204, thereby pushing the locking block 204 to squeeze the springs 203 and retract into the mounting slot 202. When the shoulder strap 407 reaches the top of the positioning post 201, the compressed springs 203 begin to extend, pushing the locking block 204 forward. At this time, the flat surface at the bottom of the locking block 204 contacts the shoulder strap 407, thereby locking it and preventing the support effect from failing due to the displacement of the waist support.

[0041] like Figures 1-3 , Figures 5-8 As shown, the control mechanism 3 includes an air pump 301. The top of the air pump 301 is fixedly connected to the bottom of the seat plate 104. The output end of the air pump 301 is fixedly connected to a gas pipe 302. The output end of the gas pipe 302 is fixedly connected to a control valve housing 303. The outer wall of the control valve housing 303 is inserted into the back plate 401. After the air pump 301 is started, it will draw in outside air and send it into the control valve housing 303 through the gas pipe 302 to control the deformation of the lumbar support.

[0042] like Figures 6-7As shown, a mounting base 304 is fixedly inserted into the inner wall of the control valve housing 303. A second spring 305 is fixedly installed at the bottom of the mounting base 304, and a piston 306 is fixedly installed at the bottom of the second spring 305. A sealing ring 307 is movably fitted onto the outer wall of the piston 306, and the outer wall of the sealing ring 307 is fixedly inserted into the inside of the control valve housing 303. A first contact 308 is provided on the inner wall of the control valve housing 303, and a second contact 309 is provided on the outer wall of the piston 306. When air enters the control valve housing 303, it first pushes the piston 306 upward, drawing it out from the sealing ring 307. Air then flows through the gaps between the relevant structures and enters the airbag 403, causing it to inflate. When the airbag 403 fits against the user's waist, it becomes difficult to continue inflating due to the pressure on the waist. At this time, as air accumulates inside the control valve housing 303, the impact force of the airflow also increases, thereby pushing the piston 306 to rise further. This causes the second contact 309 on the surface of the piston 306 to contact the first contact 308, thus forming a circuit that shuts off the air pump 301. This prevents the lumbar support from excessively compressing the user's waist, accurately distributes the pressure on the lumbar spine, and effectively reduces human error.

[0043] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A lumbar support position adjustable office chair back structure, characterized by, include: The main structure (1), multiple positioning mechanisms (2), control mechanism (3) and waist support mechanism (4); The main structure (1) serves as the main installation and support structure, and is used to realize the support function of the foundation; Multiple positioning mechanisms (2) are installed on one side of the outer wall of the main body (1) to fix the waist support after the position is adjusted; The control mechanism (3), installed at the bottom of the main body mechanism (1), provides the air required for the deformation of the device; The lumbar support mechanism (4) is fixedly connected to the output end of the control mechanism (3), and through the injected air, it fits perfectly against the user's waist. The lumbar support mechanism (4) includes a back plate (401), a set of heaters (402) is provided on one side of the outer wall of the back plate (401), an airbag (403) is attached to one side of the outer wall of the back plate (401), a protective sleeve (404) is movably sleeved on the outer wall of the airbag (403), and an exhaust valve (405) is fixedly connected to the output end of the back plate (401).

2. The lumbar support position adjustable office chair back structure according to claim 1, characterized in that: Two magnetic clasps (406) are attached to one side of the outer wall of the back plate (401). The outer walls of the two magnetic clasps (406) are magnetically connected to the outer walls of the magnetic strip (107). Two shoulder straps (407) are provided on the outer wall of the back plate (401). A set of positioning holes (408) is opened on the outer wall of each of the two shoulder straps (407). The inner wall of one of the two sets of positioning holes (408) is movably inserted into the outer wall of the positioning post (201). Hook and loop fasteners (409) are attached to the outer walls of the two shoulder straps (407). The outer walls of the two hook and loop fasteners (409) are in contact with the outer walls of the hook and loop fasteners (108).

3. An office chair backrest structure with adjustable lumbar support position according to claim 2, characterized in that: The main body (1) includes a base (101), a set of casters (102) are fixedly installed at the bottom of the base (101), a telescopic rod (103) is fixedly installed at the top of the base (101), a seat (104) is fixedly installed at the top of the telescopic rod (103), two armrests (105) and a backrest (106) are fixedly installed on the outer wall of the seat (104), two magnetic strips (107) and Velcro hooks (108) are attached to the outer wall of the backrest (106), and a button (109) is provided at the bottom of the seat (104).

4. The lumbar support position adjustable office chair back structure according to claim 3, wherein: The positioning mechanism (2) includes a positioning column (201). The outer wall of the positioning column (201) is fixedly connected to the outer wall of the backing plate (106). The outer wall of the positioning column (201) has two mounting slots (202). A set of springs (203) is fixedly installed on one side of the inner wall of each of the two mounting slots (202). A locking block (204) is fixedly installed between the outer walls of the two sets of springs (203). The inner wall of each of the two mounting slots (202) is movably inserted into the outer wall of the locking block (204).

5. The lumbar support position adjustable office chair back structure of claim 1, wherein: The control mechanism (3) includes an air pump (301), the top of which is fixedly connected to the bottom of the seat plate (104), the output end of which is fixedly connected to a gas pipe (302), the output end of which is fixedly connected to a control valve housing (303), and the outer wall of the control valve housing (303) is inserted into the back plate (401).

6. An adjustable lumbar support office chair back structure as claimed in claim 5 wherein: A mounting base (304) is fixedly inserted into the inner wall of the control valve housing (303). A second spring (305) is fixedly installed at the bottom of the mounting base (304). A piston (306) is fixedly installed at the bottom of the second spring (305). A sealing ring (307) is movably sleeved on the outer wall of the piston (306), and the outer wall of the sealing ring (307) is fixedly inserted into the inside of the control valve housing (303). A first contact (308) is provided on the inner wall of the control valve housing (303), and a second contact (309) is provided on the outer wall of the piston (306).

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