A multi-directional adjustment support structure for an office chair armrest

Abstract

The utility model relates to office chair handrail technical field discloses a kind of office chair handrail multidirectional adjusting support structure, including support square tube, the inside of the support square tube is provided with lifting mechanism, the both ends of the support square tube are provided with rotating mechanism, the surface of the rotating mechanism is provided with fixed plate, the top of the rotating mechanism is provided with hand pressure seat, and the lifting mechanism includes lifting block.The utility model is through being provided with gear surface and gear, rotating hand wheel drive gear and gear surface meshing, drive lifting block to be steadily lifted in support square tube, realize the accurate, continuous adjustment of handrail height, can adapt to the elbow support demand of different height user, by setting first clamping block, when rotating hand wheel drives hand pressure seat to go up, hand wheel surface slides from the slope of first clamping block, compresses first spring shrink, after adjusting, first spring pushes first clamping block to form axial pressure to hand wheel, prevent its reverse, ensure the self-locking after height adjustment.

Description

Technical Field

[0001] This utility model relates to the field of office chair armrest technology, and in particular to a multi-directional adjustable support structure for office chair armrests. Background Technology

[0002] As office chairs have evolved, people have increasingly higher demands for them, seeking to reduce postural fatigue through improved biomimetic design. Armrest design is one such aspect; the adjustable armrest height affects hand comfort, thereby reducing neck and shoulder fatigue.

[0003] Publication number CN219422514U discloses a universal adjustment structure for an office chair armrest, including a mounting plate, a locking unit, and a locking plate unit. The left end of the mounting plate has a locking seat groove, and the left end of the mounting plate is rotatably connected to a front and rear rotating seat. The locking unit includes a locking seat left gear plate, a locking seat gear ring, a pressing plate through-post, a pressure plate, a locking seat spring, and left and right rotating plates. The left end of the locking seat groove is slidably connected to the locking seat left gear plate. The locking seat gear ring is installed on the right end of the front and rear rotating seats. The right end of the pressing plate through-post is connected to the left end of the locking seat left gear plate. The left end of the pressing plate through-post is connected to the pressure plate. The left end of the locking seat spring is connected to the right end of the locking seat left gear plate.

[0004] The universal adjustment mechanism of this office chair armrest uses a locking seat spring to apply force to the left gear plate of the locking seat, which engages with the locking seat gear ring on the right side of the front and rear swivels to fix their angle. When the front and rear angle needs to be adjusted, press the pressure column plate and move the front and rear swivels. The locking plate rear gear plate can engage with the locking plate gear ring. The locking plate through the column can simultaneously achieve the engagement of the locking seat rear gear plate in the toothed groove. After adjusting the left and right angles of the left and right swivels, fixing them is more convenient. The locking plate tension spring can automatically fix the angle after adjusting the left and right angles of the left and right swivels, greatly improving the convenience of use. However, when adjusting the front and rear angle of the armrest, this device will cause the entire device to tilt forward and backward, changing the tilt angle of the hand press seat, resulting in discomfort when the arm is placed. At the same time, when the device is raised and lowered, it needs to rotate the hand press seat together. When the hand press seat rotates, it interferes with the seat back, causing inconvenience to the height adjustment. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a multi-directional adjustable support structure for the armrests of office chairs.

[0006] This utility model is achieved by the following technical solution: a multi-directional adjustable support structure for an office chair armrest, including a support square tube, a lifting mechanism is provided inside the support square tube, a rotating mechanism is provided at both ends of the support square tube, a fixing plate is provided on the surface of the rotating mechanism, and a hand press seat is provided on the top of the rotating mechanism. The lifting mechanism includes a lifting block, a toothed surface fixedly connected to the surface of the lifting block, a gear meshing with the toothed surface, a handwheel fixedly connected to one end of the gear, a first fixing tube fixedly connected to the surface of the supporting square tube, a first spring fixedly connected to the inner wall of the first fixing tube, and a first locking block fixedly connected to the end of the first spring away from the first fixing tube.

[0007] As a further improvement to the above solution, the surface of the lifting block is slidably connected to the inner wall of the supporting square tube, the surface of the gear is rotatably connected to the inner wall of the supporting square tube, and the surface of the first locking block is slidably connected to the inner wall of the first fixing tube.

[0008] Through the above technical solution, by setting toothed surfaces and gears, rotating the handwheel drives the gears to mesh with the toothed surfaces, thereby driving the lifting block to rise and fall smoothly within the support square tube, achieving precise and continuous adjustment of the handrail height, which can adapt to the elbow support needs of users of different heights.

[0009] As a further improvement to the above solution, the first card block has a bevel at the end near the handwheel.

[0010] With the above technical solution, by setting a first locking block, when the handwheel is rotated to drive the hand pressure seat to rise, the surface of the handwheel slides over the inclined surface of the first locking block, compressing the first spring to contract. After the adjustment is completed, the first spring pushes the first locking block to form axial pressure on the handwheel, preventing it from reversing and ensuring the self-locking property after height adjustment.

[0011] As a further improvement to the above solution, the rotating mechanism includes a horizontal rotating seat, a rotating ring block rotatably connected to the inner wall of the horizontal rotating seat, a first slot formed on the surface of the rotating ring block, a second fixed tube fixedly connected to the surface of the horizontal rotating seat, a second locking block fixedly connected to the inner wall of the second fixed tube, a second spring fixedly connected to the inner wall of the second fixed tube, a pitch rotating seat fixedly connected to the top of the lifting block, a limit groove formed on the inner wall of the pitch rotating seat, a third spring fixedly connected to the inner wall of the pitch rotating seat, a sliding plate fixedly connected to the end of the third spring away from the pitch rotating seat, a third locking block fixedly connected to the end of the sliding plate away from the pitch rotating seat, a pressure rod fixedly connected to the end of the sliding plate away from the pitch rotating seat, a rotating block rotatably connected to the surface of the pressure rod, and a second slot formed on the end of the rotating block near the pitch rotating seat.

[0012] As a further improvement to the above solution, the top of the rotating ring block is fixedly connected to the bottom of the supporting square tube, the end of the second spring away from the second fixed tube is fixedly connected to the surface of the second locking block, the locking end of the second locking block is slidably connected to the inner wall of the horizontal rotating seat, and the locking end of the second locking block is slidably connected to the inner wall of the first slot.

[0013] Through the above technical solution, by setting a second locking block, the horizontal rotating seat and the rotating ring block cooperate to rotate the device in the horizontal direction. Then, the second locking block is locked into the first locking groove under the action of the second spring, providing a clear sense of the gear position and a reliable locking force to prevent the handrail from swinging randomly.

[0014] As a further improvement to the above solution, the surface of the sliding plate is slidably connected to the inner wall of the pitch rotating seat, the surface of the sliding plate is slidably connected to the inner wall of the limiting groove, and the inner wall of the second slot is slidably connected to the surface of the third block.

[0015] The above technical solution involves setting a third locking block and a second locking slot. Pressing the lever causes the sliding plate to overcome the force of the third spring, causing the third locking block to disengage from the second locking slot. At this point, the tilt angle of the hand-operated seat can be freely adjusted. After being released, it automatically locks. The operation is intuitive and quick, supporting the user's forearm and relieving wrist pressure. At the same time, the lifting and rotating functions do not interfere with each other, ensuring the effectiveness of the adjustment.

[0016] As a further improvement to the above solution, the surface of the horizontal rotating seat is fixedly connected to the surface of the fixed plate, and the top of the rotating block is fixedly connected to the bottom of the hand-pressing seat.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model, through the setting of a lifting mechanism, specifically through the setting of toothed surfaces and gears, drives the handwheel to mesh with the gears, thereby causing the lifting block to rise and fall smoothly within the supporting square tube, achieving precise and continuous adjustment of the armrest height. This can accommodate the elbow support needs of users of different heights. By setting a first locking block, when the handwheel is turned to drive the hand pressure seat to rise, the surface of the handwheel slides over the inclined surface of the first locking block, compressing the first spring. After adjustment, the first spring pushes the first locking block to exert axial pressure on the handwheel, preventing it from reversing and ensuring self-locking after height adjustment.

[0018] This invention features a rotating mechanism, specifically a second locking block. The horizontal rotating seat and the rotating block work together to rotate the device horizontally. The second locking block, under the action of a second spring, engages with the first locking slot, providing a clear sense of position and reliable locking force to prevent the handrail from swinging arbitrarily. A third locking block and a second locking slot are then incorporated. Pressing the pressure rod causes the sliding plate to overcome the force of the third spring, disengaging the third locking block from the second locking slot. At this point, the tilt angle of the hand-operated seat can be freely adjusted. It automatically locks after being released, providing intuitive and quick operation. It supports the user's forearm, relieving wrist pressure, while the lifting and rotating mechanisms do not interfere with each other, ensuring effective adjustment. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2This is a schematic cross-sectional view of the present invention. Figure 3 This is a side view sectional structural diagram of the present invention; Figure 4 This is a schematic cross-sectional view of the lifting mechanism of this utility model; Figure 5 This is a schematic diagram of the exploded structure of this utility model.

[0020] Explanation of key symbols: 1. Supporting square tube; 2. Lifting mechanism; 201. Lifting block; 202. Toothed surface; 203. Gear; 204. Handwheel; 205. First fixed tube; 206. First spring; 207. First locking block; 3. Rotating mechanism; 301. Horizontal rotating seat; 302. Rotating ring block; 303. First locking groove; 304. Second fixed tube; 305. Second locking block; 306. Second spring; 307. Pitch rotating seat; 308. Limiting groove; 309. Third spring; 310. Sliding plate; 311. Third locking block; 312. Pressure rod; 313. Rotating block; 314. Second locking groove; 4. Fixed plate; 5. Hand pressure seat. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments. Example

[0022] Please combine Figure 1-5 This embodiment of an office chair armrest multi-directional adjustable support structure includes a support square tube 1, a lifting mechanism 2 is provided inside the support square tube 1, a rotating mechanism 3 is provided at both ends of the support square tube 1, a fixing plate 4 is provided on the surface of the rotating mechanism 3, and a hand press seat 5 is provided on the top of the rotating mechanism 3. The lifting mechanism 2 includes a lifting block 201. A toothed surface 202 is fixedly connected to the surface of the lifting block 201. A gear 203 meshes with the toothed surface 202. A handwheel 204 is fixedly connected to one end of the gear 203. A first fixed tube 205 is fixedly connected to the surface of the supporting square tube 1. A first spring 206 is fixedly connected to the inner wall of the first fixed tube 205. A first locking block 207 is fixedly connected to the end of the first spring 206 away from the first fixed tube 205.

[0023] The surface of the lifting block 201 is slidably connected to the inner wall of the supporting square tube 1, the surface of the gear 203 is rotatably connected to the inner wall of the supporting square tube 1, the surface of the first locking block 207 is slidably connected to the inner wall of the first fixed tube 205, and the handwheel 204 is rotated to drive the gear 203 to mesh with the tooth surface 202, thereby driving the lifting block 201 to rise and fall smoothly inside the supporting square tube 1, realizing precise and continuous adjustment of the armrest height, which can adapt to the elbow support needs of users of different heights.

[0024] The first locking block 207 has an inclined surface at one end near the handwheel 204. When the handwheel 204 is rotated to raise the hand pressure seat 5, the surface of the handwheel 204 slides over the inclined surface of the first locking block 207, compressing the first spring 206. After adjustment, the first spring 206 pushes the first locking block 207 to exert axial pressure on the handwheel 204, preventing it from reversing and ensuring self-locking after height adjustment.

[0025] The rotating mechanism 3 includes a horizontal rotating seat 301, a rotating ring block 302 rotatably connected to the inner wall of the horizontal rotating seat 301, a first slot 303 formed on the surface of the rotating ring block 302, a second fixing tube 304 fixedly connected to the surface of the horizontal rotating seat 301, a second locking block 305 fixedly connected to the inner wall of the second fixing tube 304, a second spring 306 fixedly connected to the inner wall of the second fixing tube 304, and a pitch rotating seat 307 fixedly connected to the top of the lifting block 201, with a limit switch formed on the inner wall of the pitch rotating seat 307. A third spring 309 is fixedly connected to the inner wall of the pitch rotating seat 307 in the groove 308. A sliding plate 310 is fixedly connected to the end of the third spring 309 away from the pitch rotating seat 307. A third locking block 311 is fixedly connected to the end of the sliding plate 310 away from the pitch rotating seat 307. A pressure rod 312 is fixedly connected to the end of the sliding plate 310 away from the pitch rotating seat 307. A rotating block 313 is rotatably connected to the surface of the pressure rod 312. A second locking groove 314 is opened at the end of the rotating block 313 near the pitch rotating seat 307.

[0026] The top of the rotating ring block 302 is fixedly connected to the bottom of the supporting square tube 1. The end of the second spring 306 away from the second fixed tube 304 is fixedly connected to the surface of the second locking block 305. The locking end of the second locking block 305 is slidably connected to the inner wall of the horizontal rotating seat 301. The locking end of the second locking block 305 is slidably connected to the inner wall of the first slot 303. The cooperation between the horizontal rotating seat 301 and the rotating ring block 302 rotates the device horizontally. Then, the second locking block 305 is locked into the first slot 303 under the action of the second spring 306, providing a clear sense of position and reliable locking force to prevent the handrail from swinging randomly.

[0027] The surface of the sliding plate 310 is slidably connected to the inner wall of the pitch rotating seat 307, and the surface of the sliding plate 310 is slidably connected to the inner wall of the limiting groove 308. The inner wall of the second slot 314 is slidably connected to the surface of the third locking block 311. Pressing the pressure rod 312 causes the sliding plate 310 to overcome the force of the third spring 309, causing the third locking block 311 to disengage from the second slot 314. At this time, the pitch angle of the hand pressure seat 5 can be freely adjusted. After being released, it automatically locks. The operation is intuitive and quick, supporting the user's forearm and relieving wrist pressure. At the same time, the lifting and rotating do not interfere with each other, ensuring the effectiveness of the adjustment.

[0028] The surface of the horizontal rotating seat 301 is fixedly connected to the surface of the fixed plate 4, and the top of the rotating block 313 is fixedly connected to the bottom of the hand-press seat 5.

[0029] The implementation principle of the multi-directional adjustable support structure for an office chair armrest in this embodiment is as follows: During use, rotating the handwheel 204 drives the gear 203 to mesh with the tooth surface 202, causing the lifting block 201 to smoothly rise and fall within the support square tube 1. This achieves precise and continuous adjustment of the armrest height, adapting to the elbow support needs of users of different heights. Simultaneously, when rotating the handwheel 204 causes the hand pressure seat 5 to rise, the surface of the handwheel 204 slides across the inclined surface of the first locking block 207, compressing the first spring 206. After adjustment, the first spring 206 pushes the first locking block 207 to exert axial pressure on the handwheel 204. To prevent reversal and ensure self-locking after height adjustment, when rotation adjustment is required, the horizontal rotating seat 301 and the rotating ring block 302 cooperate to rotate the device horizontally. Then, the second locking block 305 is locked into the first locking groove 303 under the action of the second spring 306. At the same time, the pressing rod 312 is pressed, which drives the sliding plate 310 to overcome the force of the third spring 309, so that the third locking block 311 is disengaged from the second locking groove 314. At this time, the pitch angle of the hand pressure seat 5 can be freely adjusted. After being released, it automatically locks. The operation is intuitive and quick, supports the user's forearm, relieves wrist pressure, and the lifting and rotation do not interfere with each other.

[0030] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A multi-directional adjustable support structure for the armrests of an office chair, characterized in that, Includes a supporting square tube (1), the inside of which is provided a lifting mechanism (2), both ends of which are provided with a rotating mechanism (3), the surface of which is provided with a fixing plate (4), and the top of which is provided with a hand press seat (5). The lifting mechanism (2) includes a lifting block (201), a toothed surface (202) is fixedly connected to the surface of the lifting block (201), a gear (203) is meshed with the toothed surface (202), a handwheel (204) is fixedly connected to one end of the gear (203), a first fixing tube (205) is fixedly connected to the surface of the supporting square tube (1), a first spring (206) is fixedly connected to the inner wall of the first fixing tube (205), and a first locking block (207) is fixedly connected to the end of the first spring (206) away from the first fixing tube (205).

2. The multi-directional adjustable support structure for an office chair armrest as described in claim 1, characterized in that: The surface of the lifting block (201) is slidably connected to the inner wall of the supporting square tube (1), the surface of the gear (203) is rotatably connected to the inner wall of the supporting square tube (1), and the surface of the first card block (207) is slidably connected to the inner wall of the first fixed tube (205).

3. The multi-directional adjustable support structure for an office chair armrest as described in claim 1, characterized in that: The first card block (207) has a bevel at one end near the handwheel (204).

4. The multi-directional adjustable support structure for an office chair armrest as described in claim 1, characterized in that: The rotating mechanism (3) includes a horizontal rotating seat (301), a rotating ring block (302) is rotatably connected to the inner wall of the horizontal rotating seat (301), a first slot (303) is provided on the surface of the rotating ring block (302), a second fixing tube (304) is fixedly connected to the surface of the horizontal rotating seat (301), a second locking block (305) is fixedly connected to the inner wall of the second fixing tube (304), a second spring (306) is fixedly connected to the inner wall of the second fixing tube (304), and a pitch rotating seat (307) is fixedly connected to the top of the lifting block (201), and a limit groove is provided on the inner wall of the pitch rotating seat (307). (308) A third spring (309) is fixedly connected to the inner wall of the pitch rotating seat (307). A sliding plate (310) is fixedly connected to the end of the third spring (309) away from the pitch rotating seat (307). A third locking block (311) is fixedly connected to the end of the sliding plate (310) away from the pitch rotating seat (307). A pressure rod (312) is fixedly connected to the end of the sliding plate (310) away from the pitch rotating seat (307). A rotating block (313) is rotatably connected to the surface of the pressure rod (312). A second locking groove (314) is opened at the end of the rotating block (313) near the pitch rotating seat (307).

5. The multi-directional adjustable support structure for an office chair armrest as described in claim 4, characterized in that: The top of the rotating ring block (302) is fixedly connected to the bottom of the supporting square tube (1), the end of the second spring (306) away from the second fixed tube (304) is fixedly connected to the surface of the second locking block (305), the locking end of the second locking block (305) is slidably connected to the inner wall of the horizontal rotating seat (301), and the locking end of the second locking block (305) is slidably connected to the inner wall of the first locking groove (303).

6. The multi-directional adjustable support structure for an office chair armrest as described in claim 4, characterized in that: The surface of the sliding plate (310) is slidably connected to the inner wall of the pitch rotating seat (307), the surface of the sliding plate (310) is slidably connected to the inner wall of the limiting groove (308), and the inner wall of the second slot (314) is slidably connected to the surface of the third block (311).

7. The multi-directional adjustable support structure for an office chair armrest as described in claim 4, characterized in that: The surface of the horizontal rotating seat (301) is fixedly connected to the surface of the fixed plate (4), and the top of the rotating block (313) is fixedly connected to the bottom of the hand-press seat (5).

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