Hand rest front and back sliding adjustment device of chair armrest

Abstract

The utility model discloses a hand holds before and after sliding adjusting device of chair armrest, including vertical rod part, limiting part, before and after sliding hand support part, the top fixed connection of vertical rod part has limiting part, and the top between limiting part and vertical rod part clamps and is equipped with before and after sliding hand support part, before and after sliding hand support part with vertical rod part, limiting part swing joint, before and after sliding hand support part can be adjusted to the before and after sliding of vertical rod part, limiting part, limiting part carries out the sliding distance limiting and prevents the detachment of before and after sliding hand support part, and this product can push / pull before and after sliding hand support part to some or some behind according to the length of personal hand, to make the forearm and palm of hand suitable to hold and put, reaches the comfortable degree of required placement. The above structure can adjust the comfortable degree of required hand according to the length of human hand, height, fat, sitting, half lying etc. The structure design is reasonable, and the use is convenient.

Description

Technical Field

[0001] This utility model relates to wheelchair components, and more particularly to a forward and backward sliding adjustment device for the armrest of a chair. Background Technology

[0002] 1. Chinese Patent Publication No. CN213047774U discloses a wheelchair armrest flipping and fixing mechanism, including an armrest assembly mounted on a frame. The armrest assembly includes an armrest arranged in a front-to-back direction. The rear end of the armrest is hinged and fixed to the frame. The armrest is hinged and fixed to the rear end of a connecting block at a distance from the rear end. The front end of the connecting block is hinged and fixed to the upper end of a support rod. The lower end of the support rod is hinged and fixed to the frame. Another connecting block extending downward is provided at the distance from the rear end of the armrest. A locking mechanism is provided between the two connecting blocks to cooperate for connecting and fixing the two connecting blocks. The two connecting blocks are a first connecting block and a second connecting block, respectively. The connecting block on the lower side of the armrest is the second connecting block, and the connecting block between the armrest and the support rod is the first connecting block.

[0003] 2. Chinese Patent Publication No. CN211912029U discloses a wheelchair armrest flipping structure, including a seat frame and a pair of armrests rotatably disposed on the left and right sides of the seat frame. Features: Each armrest extends forward and has a connecting foot below its midpoint along its length. A sliding sleeve is hinged to each connecting foot, and a sliding rod is slidably disposed within the sliding sleeve. One end of the sliding rod extending from the sliding sleeve forms a curved tube, the end of which is hinged to the corresponding side of the seat frame. The armrest, sliding sleeve, sliding rod, and seat frame on adjacent sides form a triangular support structure. Advantages: Increases the fixation and support strength of the armrests and eliminates the influence of the support frame on the rotation angle of the armrests.

[0004] Both examples above disclose wheelchair armrests with a flip function but lack forward and backward sliding adjustment, making them unsuitable for different user needs in terms of arm length, height, weight, sitting upright, or reclining, thus inconvenient to use.

[0005] 3. Most existing wheelchair armrests are fixed and cannot be adjusted, making them unsuitable for different arm lengths, heights, weights, sitting positions, and reclining positions, thus causing inconvenience. Utility Model Content

[0006] To solve the above-mentioned technical problems, this utility model provides a chair armrest hand rest that has a reasonable structural design and is easy to adjust by sliding forward and backward.

[0007] The solution to the above technical problem is as follows:

[0008] A chair armrest handrest sliding adjustment device includes a vertical rod component, a limiting component, and a front-to-back sliding handrest component. The limiting component is fixedly connected to the top of the vertical rod component, and the front-to-back sliding handrest component is sandwiched between the limiting component and the top of the vertical rod component. The front-to-back sliding handrest component is movably connected to the vertical rod component and the limiting component, and the front-to-back sliding handrest component can slide and adjust back and forth relative to the vertical rod component and the limiting component. The limiting component limits the sliding distance of the front-to-back sliding handrest component and prevents it from falling off.

[0009] The beneficial effects of this utility model's adjustable armrest handrest sliding mechanism are as follows: This product allows the sliding armrest components to be pushed / pulled forward or backward according to individual hand length, ensuring a comfortable placement for the forearm and hand. The structure can be adjusted to suit different hand lengths, heights, builds, and whether the user is sitting upright or reclining. The design is reasonable and convenient to use. Attached Figure Description

[0010] Figure 1 This is a perspective view of the product of this utility model;

[0011] Figure 2 This is a side view of the product of this utility model;

[0012] Figure 3 yes Figure 2 A sectional view along the AA direction;

[0013] Figure 4 This is a schematic perspective view of the sliding hand support component of the present invention after it has been adjusted by sliding backward.

[0014] Figure 5 This is an exploded view of the sliding hand support component of this utility model after it has been adjusted by sliding backward.

[0015] Figure 6 This is a schematic perspective view of the sliding hand support component of the present invention after it has been adjusted by sliding forward.

[0016] Figure 7 This is an exploded view of the sliding hand support component of this utility model after it has been adjusted by sliding forward.

[0017] Figure 8 This is an exploded view of the product of this utility model;

[0018] Figure 9 This is a schematic perspective view of the front and rear sliding hand support component with front and rear gear adjustment device after it has been slid forward for adjustment.

[0019] Figure 10 This is a schematic perspective view of the front and rear sliding hand support component with front and rear gear adjustment device after it has been slid backward for adjustment.

[0020] Figure 11 , Figure 12 This is an exploded view of the product of this utility model with a front and rear gear adjustment device;

[0021] Figure 13 This is a side view of the connection between the vertical rod component and the limiting component of the present invention;

[0022] Figure 14 This is a perspective view of the product of this utility model with a hand support pad;

[0023] Figure 15 This is a perspective view of the product of this utility model;

[0024] Figure 16 This is a perspective view of the product of this utility model with a hand support pad;

[0025] Figure 17 This is a perspective view of the gear shift elongated shell and the gear shift ball connection state of the present utility model product;

[0026] Figure 18 This is an exploded view of the product of this utility model.

[0027] Vertical rod component 1, cross-sectional platform 101, limiting component 2, limiting and anti-detachment component 21, connecting piece 22, front and rear sliding hand support component 3, limiting cavity 301, long through hole 302, bottom shell 31, top cover 32, front and rear gear adjustment device 4, gear long shell component 41, positioning long groove 411, gear ball 42, gear step 43, clamping groove 44, hand support pad 5, lower vertical tube 11, upper widened tube opening component 12, cross-sectional component 13. Detailed Implementation

[0028] like Figures 1 to 18The image shows a chair armrest handrest sliding adjustment device, comprising a vertical rod component 1, a limiting component 2, and a sliding handrest component 3. The vertical rod component 1 is fixed. The vertical rod component 1 can be a hollow or solid structure. The vertical rod component 1 supports the sliding handrest component 3, and its shape and structure are not limited; the vertical rod component 1, the limiting component 2, and the sliding handrest component 3 are made of plastic. A limiting component 2 is fixedly connected to the top of the vertical rod component 1. The limiting component 2 prevents the front-to-back sliding hand support component 3 from dislodging and limits its forward-to-back sliding distance. The front-to-back sliding hand support component 3 is clamped between the limiting component 2 and the top of the vertical rod component 1, allowing it to slide forward and backward relative to the limiting component 2 and the vertical rod component 1, providing support and positioning. The front-to-back sliding hand support component 3 is movably connected to the vertical rod component 1 and the limiting component 2, allowing it to slide forward and backward and adjust relative to the vertical rod component 1 and the limiting component 2. The limiting component 2 limits the sliding distance of the front-to-back sliding hand support component 3 and prevents it from dislodging. During use, depending on the length of an individual's hand, the front-to-back sliding hand support component 3 can be pushed / pulled forward or backward to accommodate the forearm and hand, achieving the desired comfort. This structure can be adjusted to suit different hand lengths, heights, builds, sitting positions, and reclining positions for optimal comfort. The design is reasonable and convenient to use.

[0029] Further, in the preferred technical solution: a limiting cavity 301 is formed inside the front-to-back sliding hand support component 3, and a long through hole 302 is formed at the bottom of the limiting cavity 301. The length of the long through hole 302 is 5 cm to 20 cm. The front-to-back sliding hand support component 3 can slide and adjust within the length range of the long through hole 302. The bottom surface of the limiting cavity 301 is flat, and the long through hole 302 is arranged axially from front to back. The limiting component 2 includes a limiting and anti-detachment component 21 and a connecting piece 22. The diameter of the limiting and anti-detachment component 21 is larger than the width of the long through hole 302. The bottom of the anti-detachment component 21 is connected to a connecting piece 22, and the bottom of the connecting piece 22 is fixedly connected to the top of the vertical rod component 1. The anti-detachment component 21 is arranged in the limiting cavity 301, and the connecting piece 22 passes through the elongated through hole 302. A front-to-back sliding hand support component 3 is movably clamped between the anti-detachment component 21 and the top of the vertical rod component 1. The front-to-back sliding hand support component 3 slides back and forth within the length range of the elongated through hole 302. The above is a further refined structure of the front-to-back sliding hand support component 3 and the limiting component 2. This structure is reasonably designed and convenient to use. The above structure provides a limiting cavity 301 to install the anti-detachment component 21, providing a space for the anti-detachment component 21 and compressing the installation height, so that the thickness of the front-to-back sliding hand support component 3 can be made thinner. At the same time, an elongated through hole 302 is provided to facilitate the passage of the connecting piece 22 and the clamping of the front-to-back sliding hand support component 3. The length of the elongated through hole 302 is set to facilitate limiting the required front-to-back sliding distance.

[0030] The limiting cavity 301 is an elongated limiting cavity 301. An elongated through hole 302 is provided at the bottom of the front section of the elongated limiting cavity 301. The elongated limiting cavity 301 makes it convenient to set the elongated through hole 302.

[0031] A front and rear gear adjustment device 4 is provided between the limiting and anti-slip component 21 and the bottom of the rear section of the elongated limiting cavity 301. This device is used to achieve multi-gear adjustment and fixation, making it less prone to natural slippage and also providing anti-slip properties. After adjustment, it is relatively fixed.

[0032] Further, in the preferred technical solution: the front and rear gear adjustment device 4 includes a long gear housing 41, gear balls 42, and several gear levels 43. The long gear housing 41 is perfectly positioned within the limiting cavity 301. The long gear housing 41, gear balls 42, and several gear levels 43 are all housed within the long limiting cavity 301. The long limiting cavity 301 is used for height compression during installation, resulting in a tighter structure and preventing misalignment or loosening. Several gear levels 43, typically 5 to 10, protrude laterally upwards from the bottom of the rear section of the long limiting cavity 301. Each gear level 43 is composed of several ribs and several adjacent grooves. The limiting anti-detachment component 21 is fixedly connected to the long gear housing 41 by screws, snap-fits, clamps, or through-hole connections. Gear balls 42 are clamped between the rear bottom of the long gear housing 41 and the gear levels 43. The long gear housing 41 is made of plastic. The shifting elongated housing 41 can be a single component or composed of multiple parts fixedly connected together. The length of the shifting elongated housing 41 is 30% to 50% of the limiting cavity 301. The shifting elongated housing 41 serves to position the front and rear sliding hand support components 3. The shifting ball 42 is relatively small, and there is a gap between the shifting elongated housing 41 and the rear bottom wall of the limiting cavity 301. When the front and rear sliding hand support components 3 are pushed or pulled with a little force, the shifting stage 43 of the front and rear sliding hand support components 3 can pass over the shifting ball 42. The shifting ball 42 will roll in its original position. After the front and rear sliding hand support components 3 are stopped from being pushed or pulled, the shifting ball 42 falls into the groove of the corresponding shifting stage 43 for positioning and fixation, which plays a role in anti-slip, thus realizing multi-position adjustment and positioning fixation. With the above structure, the front and rear sliding hand support components 3 are easy to slide and easily pass the shifting stage, making pushing / pulling relatively easy.

[0033] Preferably, the gear shift ball 42 is rolled in the ball hole at the rear bottom of the gear shift long shell 41, with 60% of the gear shift ball 42 partially embedded in the ball hole and 40% partially protruding.

[0034] Preferably, a spring-loaded stop ball 42 is placed inside the ball bearing hole, which makes the stop ball 42 more elastic and makes it easier for the front and rear sliding hand support component 3 to slide.

[0035] A clamping groove 44 is formed between the top of the long shell part 41 of the stop position and the top of the vertical rod part 1. The front and rear sliding hand support part 3 is movably clamped between the long shell part 41 of the stop position and the top of the vertical rod part 1 through the clamping groove 44, which increases the clamping area and makes the front and rear sliding hand support part 3 less prone to loosening, deviation, and more stable sliding.

[0036] The bottom of the gear shift long shell 41 is integrally provided with a positioning long groove 411, and the gear shift stage 43 is embedded in the positioning long groove 411 to provide sliding positioning for the front and rear sliding hand support component 3.

[0037] The top of the vertical rod component 1 has a cross-sectional platform 101. The top surface of the cross-sectional platform 101 is flat, increasing the contact area with the bottom surface of the front and rear sliding hand support component 3, making the front and rear sliding hand support component 3 slide more stably. The front and rear sliding hand support component 3 is long and rectangular in shape, with a suitable design. The front and rear sliding hand support component 3 includes a bottom shell 31 and a top cover 32. The bottom shell 31 and the top cover 32 are respectively injection molded. The top of the bottom shell 31 is fixedly connected to the top cover 32 by snap-fit, screw, or plug-in. A limiting cavity 301 is opened inside the top of the bottom shell 31. The limiting cavity 301 is covered by the top cover 32. The limiting cavity 301 is long and rectangular in shape with a flat bottom surface to flatly place the stop long shell component 41. The limiting anti-detachment component 21 and the stop long shell component 41 are arranged in the limiting cavity 301. A suitable front and rear sliding hand support component 3 structure is set to facilitate the installation of the limiting anti-detachment component 21 and the stop long shell component 41.

[0038] The hand support sliding adjustment device also includes a hand support pad 5. The bottom of the hand support pad 5 has an embedded cavity. The front and back sliding hand support component 3 is embedded in the embedded cavity and fixedly connected by adhesive or snap-fit. The hand support pad 5 surrounds the front, back, left, right and top of the front and back sliding hand support component 3 to surround and fix the front and back sliding hand support component 3, and also fixes the hand support pad 5. The hand support pad 5 makes it more comfortable for people to put their hands down.

[0039] The hand support pad 5 is a soft hand support pad 5, such as: cotton material, foam material, or soft plastic, to improve the comfort of placing your hand on it.

[0040] The vertical rod component 1 includes a lower vertical tube 11 and an upper widened tube opening component 12. The top of the lower vertical tube 11 is integrally connected to the upper widened tube opening component 12 and is integrally injection molded. The upper widened tube opening component 12 is widened to increase the top area. The top cross section of the upper widened tube opening component 12 is set horizontally. A cross section component 13 is embedded and fixed on the top tube opening of the upper widened tube opening component 12. The top surface of the cross section component 13 has a cross section platform 101. A through-connector 22 extends integrally upward from the top of the cross section platform 101. The cross section component 13 and the through-connector 22 are integrally injection molded. The top of the through-connector 22 is fixedly connected to a limiting and anti-detachment component 21 with screws. The width or diameter of the limiting and anti-detachment component 21 is greater than that of the long through hole 302.

[0041] The connector 22 is cylindrical, relatively short, and designed with a suitable shape. The height of the cylinder is between 1 cm and 3 cm.

Claims

1. A sliding adjustment device for the armrest of a chair, characterized in that: It includes a vertical rod component, a limiting component, and a front and rear sliding hand support component; the top of the vertical rod component is fixedly connected to the limiting component, and the front and rear sliding hand support component is sandwiched between the limiting component and the top of the vertical rod component. The front and rear sliding hand support component is movably connected to the vertical rod component and the limiting component, and the front and rear sliding hand support component can slide and adjust back and forth relative to the vertical rod component and the limiting component; the limiting component limits the sliding distance of the front and rear sliding hand support component and prevents it from falling off.

2. The armrest sliding adjustment device for a chair armrest according to claim 1, characterized in that: The front and rear sliding hand support component has a limiting cavity inside, and a long through hole is provided at the bottom of the limiting cavity. The long through hole is axially arranged from front to back. The limiting component includes a limiting anti-detachment component and a connecting piece. The bottom of the limiting anti-detachment component is connected to the connecting piece, and the bottom of the connecting piece is fixedly connected to the top of the vertical rod component. The limiting anti-detachment component is arranged in the limiting cavity, and the connecting piece passes through the long through hole. The front and rear sliding hand support component is movably clamped between the limiting anti-detachment component and the top of the vertical rod component. The front and rear sliding hand support component slides back and forth within the length range of the long through hole.

3. The armrest sliding adjustment device for a chair armrest according to claim 2, characterized in that: The limiting cavity is an elongated limiting cavity, with a long through hole at the bottom of the front section of the elongated limiting cavity; a front and rear gear adjustment device is provided between the limiting and anti-detachment component and the bottom of the rear section of the elongated limiting cavity.

4. The armrest sliding adjustment device for a chair armrest according to claim 3, characterized in that: The front and rear gear adjustment device includes a gear elongated housing, gear balls, and several gear levels. The gear elongated housing, gear balls, and several gear levels are all arranged in an elongated limiting cavity. Several gear levels are laterally protruded upward from the bottom of the rear section of the elongated limiting cavity. The limiting anti-disengagement component is fixedly connected to the gear elongated housing, and gear balls are clamped between the rear bottom of the gear elongated housing and the gear levels.

5. The armrest sliding adjustment device for a chair armrest according to claim 4, characterized in that: A clamping groove is formed between the top of the long shell of the stop and the top of the vertical rod component, and a front and rear sliding hand support component is movably clamped between the long shell of the stop and the top of the vertical rod component through the clamping groove.

6. The armrest sliding adjustment device for a chair armrest according to claim 5, characterized in that: The top of the vertical rod component has a cross-sectional platform with a flat top surface; the front and rear sliding hand support component is rectangular in shape; the front and rear sliding hand support component includes a bottom shell and a top cover, the top of the bottom shell is fixedly connected to the top cover, and a limiting cavity is opened inside the top of the bottom shell. The limiting cavity is rectangular in shape with a flat bottom surface, and the limiting anti-detachment component and the stop long shell component are arranged in the limiting cavity.

7. The armrest sliding adjustment device for a chair armrest according to claim 1, characterized in that: It also includes a hand support pad, the bottom of which has an embedded cavity. The front and rear sliding hand support components are embedded in the embedded cavity and fixedly connected. The hand support pad surrounds the front, back, left, right and top five surfaces of the front and rear sliding hand support components.

8. A chair armrest handrest sliding adjustment device according to claim 4 or 5, characterized in that: The bottom of the gear shift long shell is integrally provided with a positioning long groove, and the gear shift stage is embedded in the positioning long groove.

9. The armrest sliding adjustment device for a chair armrest according to claim 6, characterized in that: The vertical rod component includes a lower vertical tube and an upper widening tube opening component. The top of the lower vertical tube is integrally connected to the upper widening tube opening component. The top cross-section of the upper widening tube opening component is horizontally set. A cross-section component is embedded and fixed on the top surface of the upper widening tube opening component. The top surface of the cross-section component has a cross-section platform. A through-connector extends integrally upward from the top of the cross-section platform. A limiting and anti-detachment component is fixedly connected to the top of the through-connector.

10. The armrest sliding adjustment device for a chair armrest according to claim 9, characterized in that: The connector is cylindrical.

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