CN219250730U - Liftable wheelchair armrest - Google Patents

Abstract

The utility model discloses a liftable wheelchair armrest, which comprises an armrest seat, wherein an armrest seat screw is fixed on a wheelchair, an elevating cylinder is slidably embedded in the upper part of the armrest seat, an armrest bottom shell is integrally formed in the upper part of the elevating cylinder, an armrest surface shell is fixedly arranged on the upper side screw of the armrest bottom shell, a unidirectional locking mechanism is connected between the bottom of the elevating cylinder and the inner wall of the armrest seat, a button is movably arranged at the bottom end of the armrest bottom shell, an unlocking mechanism is connected between the button and the unidirectional locking mechanism in a transmission manner, the wheelchair armrest is lifted up and can be lifted up to different heights freely, and the wheelchair armrest has a unidirectional self-locking function, so that the wheelchair armrest cannot slide down when not unlocked, the lifting safety is fully ensured, a user can be helped to stand up, the wheelchair armrest and the button at the lower part thereof are held when the height of the wheelchair armrest is required to be reduced, the unidirectional self-locking function of the wheelchair armrest can be unlocked, the wheelchair armrest can be freely telescopic, and the wheelchair armrest can be conveniently adjusted to a sitting and standing and comfortable state.

Description

Liftable wheelchair armrest

Technical Field

The utility model relates to the technical field of wheelchair armrests, in particular to a liftable wheelchair armrest.

Background

The wheelchair is provided with wheels and can help to replace walking, is an important moving tool for the home rehabilitation, turnover transportation, treatment and outgoing activities of wounded persons, patients and disabled persons, meets the riding-assisting requirements of disabled persons and disabled persons, is more important to facilitate the movement of family members and care of patients, enables the patients to exercise and participate in social activities by means of the wheelchair, and can be divided into electric and manual wheelchairs from driving, wherein the wheelchair can be functionally divided into a standard wheelchair, a nursing wheelchair (the rear wheel is a small wheel with 12-16 inches), a toilet chair (a toilet chair), a cerebral palsy chair, a sport wheelchair, a bearing wheelchair (an obesity wheelchair), an auxiliary standing wheelchair, an airplane wheelchair (a travel wheelchair), a beach wheelchair and the like;

chinese patent publication No. CN210170324U discloses a liftable wheelchair armrest, it adopts simple gag lever post and spring structure interface to realize locking and unblock of armrest, however, the unlocking button side direction setting of above-mentioned patent does not accord with the operating habit of wheelchair armrest manual lift, still keep the push state to the button when holding, and this wheelchair armrest has the risk of downward slippage when carrying out the lifting, when the user relies on wheelchair armrest to stand up, there is very big potential safety hazard, for this the utility model provides a liftable wheelchair armrest is used for solving above-mentioned problem.

Disclosure of Invention

The utility model provides a lifting wheelchair armrest, which solves the technical problems that the lateral arrangement of an unlocking button of the traditional lifting wheelchair armrest does not accord with the operation habit of manual lifting of the wheelchair armrest, the push state of the button is kept when the wheelchair armrest is held, the wheelchair armrest is in a downward slipping risk when lifted, and a great potential safety hazard exists when a user stands up by depending on the wheelchair armrest.

In order to solve the technical problems, the lifting wheelchair armrest provided by the utility model comprises an armrest seat, wherein the armrest seat is screwed on a wheelchair, a lifting cylinder is embedded in the upper part of the armrest seat in a sliding manner, an armrest bottom shell is integrally formed on the upper part of the lifting cylinder, an armrest surface shell is screwed on the upper side of the armrest bottom shell, a unidirectional locking mechanism is connected between the bottom of the lifting cylinder and the inner wall of the armrest seat, a button is movably arranged at the bottom end of the armrest bottom shell, and an unlocking mechanism is connected between the button and the unidirectional locking mechanism in a transmission manner.

Preferably, the unidirectional locking mechanism comprises locking blocks which are embedded in two sides of the bottom of the lifting cylinder in a sliding manner, one end of each locking block, which is positioned in the lifting cylinder, is fixedly connected with a sliding block, grooves are formed in adjacent sides of the sliding blocks, springs are fixedly connected between the two grooves, and inclined surfaces are arranged on the upper parts of one sides, away from each other, of the sliding blocks.

Preferably, the unidirectional locking mechanism further comprises a plurality of locking grooves which are equidistantly arranged on the inner walls of the two sides of the handrail seat, the locking grooves are matched with one end structure of the locking block, which is positioned outside the lifting cylinder, and the locking grooves are in a right trapezoid or right triangle structural design.

Preferably, the unlocking mechanism comprises a central shaft rotating between the inner walls of the two sides of the armrest bottom shell, a lever is sleeved on the outer side of the central shaft in a rotating mode, rectangular frames are fixedly connected to the two ends of the lever, sliding pins are fixedly connected to the first vertical plate and the second vertical plate in a sliding embedded mode in the rectangular frames, the sliding pins are fixedly connected with the first vertical plate and the second vertical plate respectively, the first vertical plate is fixedly connected with the button, the second vertical plate extends to an armrest seat and is fixedly connected with a clamping fork, the clamping fork can slide along the inner wall of the armrest seat, and two ends of the clamping fork are respectively and correspondingly arranged with two slope surfaces.

Preferably, the section of the button is in an inverted convex structure, and the button is in sliding connection with the armrest bottom shell.

Preferably, the bottom port of the armrest surface shell is adaptively embedded in the upper opening of the armrest bottom shell, and a soft cushion layer is covered on the upper side of the armrest surface shell.

Compared with the related art, the liftable wheelchair armrest provided by the utility model has the following beneficial effects:

the lifting wheelchair armrest disclosed by the utility model can be lifted up to different heights freely, has a unidirectional self-locking function, prevents the wheelchair armrest from sliding downwards when not unlocked, fully ensures lifting safety, can help a user to stand up, and can unlock the unidirectional self-locking function of the wheelchair armrest by holding the wheelchair armrest and a button at the lower part of the wheelchair armrest when the height of the wheelchair armrest needs to be reduced, so that the wheelchair armrest can be freely stretched and contracted, is convenient to adjust to a sitting and standing comfortable state, and is more convenient and faster to use.

Drawings

FIG. 1 is a side cross-sectional view of an armrest of a liftable wheelchair of the present utility model;

FIG. 2 is an enlarged view of the structure A of the armrest of the wheelchair in FIG. 1;

fig. 3 is a schematic structural view of an unlocking mechanism in a lifting wheelchair armrest.

Reference numerals in the drawings: 1. a handrail seat; 2. a lifting cylinder; 21. an armrest bottom shell; 3. a handrail face shell; 31. a soft cushion layer; 4. a unidirectional locking mechanism; 41. a locking block; 42. a slide block; 43. a spring; 44. a slope surface; 45. a locking groove; 5. a button; 6. an unlocking mechanism; 61. a central shaft; 62. a lever; 63. a rectangular frame; 64. a slide pin; 65. a first riser; 66. a second riser; 67. and (5) clamping forks.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model; all other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Examples: 1-3, the lifting wheelchair armrest comprises an armrest seat 1, wherein the armrest seat 1 is screwed on a wheelchair, a lifting cylinder 2 is embedded in the upper part of the armrest seat 1 in a sliding manner, an armrest bottom shell 21 is integrally formed on the upper part of the lifting cylinder 2, an armrest surface shell 3 is screwed on the upper side of the armrest bottom shell 21, a bottom port of the armrest surface shell 3 is adaptively embedded in an upper opening of the armrest bottom shell 21, and a soft cushion layer 31 is covered on the upper side of the armrest surface shell 3;

specifically, the bottom of the armrest surface shell 3 is provided with an inner flange, and the inner flange is matched with the upper open structure design of the armrest bottom shell 21, so that the armrest surface shell 3 is convenient to position;

specifically, at least one threaded column casing is arranged on the inner wall of the armrest surface shell 3, and a screw is connected with the threaded column casing by penetrating through a preformed hole at the bottom of the armrest bottom shell 21, so that the armrest bottom shell 21 and the armrest surface shell 3 can be prevented from being separated, and the assembly is convenient;

specifically, the leather layer is wrapped on the outer side of the cushion layer 31, so that wiping and cleaning can be facilitated, and a sponge layer which is fixedly bonded with the armrest surface shell 3 is arranged in the leather layer, so that comfort is good.

Further, a unidirectional locking mechanism 4 is connected between the bottom of the lifting cylinder 2 and the inner wall of the armrest seat 1, the unidirectional locking mechanism 4 comprises locking blocks 41 which are slidably embedded in two sides of the bottom of the lifting cylinder 2, one ends of the locking blocks 41 positioned in the lifting cylinder 2 are fixedly connected with sliding blocks 42, grooves are formed in adjacent sides of the sliding blocks 42, springs 43 are fixedly connected between the two grooves, and inclined surfaces 44 are formed in upper parts of one sides, away from each other, of the two sliding blocks 42;

specifically, when the lifting device is lifted to different heights, the locking blocks 41 are inserted into different locking grooves 45 one by one under the action of the elastic force of the springs 43, so that the locking blocks 41 are prevented from moving downwards, and the height of the lifting cylinder 2 can be limited.

Further, the unidirectional locking mechanism 4 further comprises a plurality of locking grooves 45 equidistantly arranged on the inner walls of the two sides of the handrail seat 1, the locking grooves 45 are matched with one end structure of the locking block 41 positioned outside the lifting cylinder 2, and the locking grooves 45 are in a right trapezoid or right triangle structural design;

specifically, the lifting cylinder 2 moves upward, and the inclined surface of the locking block 41 presses the inclined surface of the locking groove 45, so that the locking block 41 is retracted into the lifting cylinder 2, and the lifting cylinder 2 can be lifted freely.

Further, a button 5 is movably arranged at the bottom end of the armrest bottom shell 21, the section of the button 5 is in an inverted convex structure, and the button 5 is in sliding connection with the armrest bottom shell 21;

specifically, the bottom of the armrest bottom shell 21 is provided with an opening, the narrow neck end of the button 5 can slide up and down in the opening, and the wide diameter end of the button 5 plays a limiting role to prevent the button from falling out of the opening.

Further, an unlocking mechanism 6 is in transmission connection between the button 5 and the unidirectional locking mechanism 4, the unlocking mechanism 6 comprises a central shaft 61 rotating between the inner walls of the two sides of the armrest bottom shell 21, a lever 62 is sleeved outside the central shaft 61 in a rotating manner, two ends of the lever 62 are fixedly connected with rectangular frames 63, sliding pins 64 are respectively and slidably embedded in the rectangular frames 63, the two sliding pins 64 are respectively and fixedly connected with a first vertical plate 65 and a second vertical plate 66, the first vertical plate 65 is fixedly connected with the button 5, the second vertical plate 66 extends into the armrest seat 1 and is fixedly connected with a clamping fork 67, the clamping fork 67 can slide along the inner wall of the armrest seat 1, and two ends of the clamping fork 67 are respectively and correspondingly arranged with the two slope surfaces 44;

specifically, the wheelchair armrest and the button 5 below the wheelchair armrest are held, the button 5 pushes the sliding pin 64 at one end of the lever 62 to move upwards, the other end of the lever 62 can be pushed to move downwards, the second vertical plate 66 is lowered, the clamping fork 67 can press the inclined surface 44 on the sliding blocks 42, otherwise, under the action of the elastic force of the spring 43, the two sliding blocks 42 are away from each other, the inclined surface 44 can press the clamping fork 67 to move upwards, and the button 5 can be driven to reset.

Working principle: when the device is used, a user lifts the armrest bottom shell 21 upwards, the lifting cylinder 2 moves upwards, the inclined surface of the locking block 41 presses the inclined surface of the locking groove 45, the locking block 41 is contracted into the lifting cylinder 2, when the lifting cylinder is lifted to different heights, the locking block 41 is inserted into the different locking grooves 45 one by one under the action of the elasticity of the spring 43, the locking block 41 is prevented from moving downwards, the height of the wheelchair armrest can be lifted freely, the user is helped to stand up, when the height of the wheelchair armrest needs to be lowered, the user holds the wheelchair armrest and the button 5 at the lower part of the wheelchair armrest, the button 5 pushes the sliding pin 64 at one end of the lever 62 to move upwards, the other end of the lever 62 is pushed to move downwards, the second vertical plate 66 descends, the clamping fork 67 presses the inclined surface 44 on the sliding blocks 42, the two sliding blocks 42 are close to each other, the locking block 41 is separated from the locking groove 45, and the height of the wheelchair armrest can be lowered freely.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims (6)

1. The utility model provides a liftable wheelchair handrail, includes handrail seat (1), handrail seat (1) screw fixation is on the wheelchair, its characterized in that, handrail seat (1) upper portion slides and inlays and be equipped with lift section of thick bamboo (2), lift section of thick bamboo (2) upper portion integrated into one piece is provided with handrail drain pan (21), the upside screw fixation of handrail drain pan (21) has handrail face-piece (3), wherein, be connected with unidirectional locking mechanism (4) between lift section of thick bamboo (2) bottom and handrail seat (1) inner wall, handrail drain pan (21) bottom activity is provided with button (5), the transmission is connected with release mechanism (6) between button (5) and unidirectional locking mechanism (4).

2. A liftable wheelchair armrest according to claim 1, characterized in that: the unidirectional locking mechanism (4) comprises locking blocks (41) which are embedded in two sides of the bottom of the lifting cylinder (2) in a sliding manner, one ends of the locking blocks (41) located in the lifting cylinder (2) are fixedly connected with sliding blocks (42), grooves are formed in adjacent sides of the sliding blocks (42), springs (43) are fixedly connected between the two grooves, and inclined surfaces (44) are formed in the upper parts of one sides, away from each other, of the sliding blocks (42).

3. A liftable wheelchair armrest according to claim 2, characterized in that: the unidirectional locking mechanism (4) further comprises a plurality of locking grooves (45) which are equidistantly arranged on the inner walls of the two sides of the handrail seat (1), one end of each locking groove (45) and each locking block (41) located outside the lifting cylinder (2) is structurally matched with each other, and each locking groove (45) is in a right trapezoid or right triangle structural design.

4. A liftable wheelchair armrest according to claim 1, characterized in that: the unlocking mechanism (6) comprises a central shaft (61) which rotates between the inner walls of two sides of the handrail bottom shell (21), a lever (62) is sleeved on the outer side of the central shaft (61) in a rotating mode, two ends of the lever (62) are fixedly connected with rectangular frames (63), sliding pins (64) are embedded in the rectangular frames (63) in a sliding mode, the sliding pins (64) are fixedly connected with a first vertical plate (65) and a second vertical plate (66) respectively, the first vertical plate (65) is fixedly connected with a button (5), the second vertical plate (66) extends to the inner wall of the handrail seat (1) and is fixedly connected with a clamping fork (67), the clamping fork (67) can slide along the inner wall of the handrail seat (1), and two ends of the clamping fork are correspondingly arranged with two slope surfaces (44) respectively.

5. A liftable wheelchair armrest according to claim 1, characterized in that: the section of the button (5) is of an inverted convex structure, and the button (5) is in sliding connection with the armrest bottom shell (21).

6. A liftable wheelchair armrest according to claim 1, characterized in that: the bottom port of the armrest surface shell (3) is adaptively embedded in the upper opening of the armrest bottom shell (21), and a soft cushion layer (31) is arranged on the upper side of the armrest surface shell (3) in a covering manner.

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