A lockable armrest for a wheelchair

Abstract

This utility model discloses a lockable armrest for a wheelchair, relating to the field of wheelchair technology. It includes: support rods fixedly installed on the left and right sides of the wheelchair body; a support plate rotatably connected to the top of each support rod; connecting rods rotatably connected to both sides of each support rod; a connecting column installed at the end of each connecting rod away from the support rod; a movable groove for the connecting column to move on the surface of the support plate; and an arc-shaped locking block within the cavity of the movable groove to limit and lock the connecting column. By setting up a deformable armrest support assembly, the shape of the armrest support can be changed to meet different needs, effectively preventing the user's arm from slipping. Used in conjunction with the connecting rods and the arc-shaped locking block, the entire support plate can be locked or unlocked, improving the stability of the armrest during use.

Description

Technical Field

[0001] This utility model relates to the field of wheelchair technology, specifically to a lockable armrest for a wheelchair. Background Technology

[0002] Armrests are an essential component of wheelchairs. Both manual and electric wheelchairs are usually equipped with a pair, one on each side of the seat.

[0003] Among them, CN222899519U discloses a lockable armrest for a wheelchair, including an armrest body holder, the left end of which forms an armrest body holder hinge seat that hinges to the side of the seat back frame; an armrest body, which is fixed to the upward-facing side of the armrest body holder in the use state; and a support tube, the end of which, in the use state, faces the seat and forms a support tube hinge seat for hinged to the side of the seat frame. The key feature is that it also includes an armrest body holder locking / unlocking mechanism for locking or unlocking the armrest body holder, which is hinged between the armrest body holder and the end of the support tube facing the armrest body holder. Advantages: The structure is reasonable and stable, providing good safety protection; it does not affect the folding of the wheelchair; and it facilitates entry and exit from the side of the wheelchair for users with relatively limited mobility.

[0004] During use, it was found that the lockable armrest had issues, especially for users who spend long periods in a wheelchair or are overweight. Due to the narrow armrest, the user's hands could easily slip off. Users had to hold onto the armrest to prevent their elbows and arms from slipping off, which could cause fatigue and soreness in the arms after prolonged use. Therefore, a lockable armrest for wheelchairs needs to be designed to improve these problems. Utility Model Content

[0005] In view of the shortcomings of the existing technology, this utility model provides a lockable armrest for a wheelchair.

[0006] To achieve the above objectives, the technical solution of this utility model is as follows: A lockable armrest for a wheelchair, comprising: Support rods are fixedly installed on the left and right sides of the wheelchair body. A support plate is rotatably connected to the top of the support rod. Connecting rods are rotatably connected to both sides of the support rod. A connecting column is installed at the end of the connecting rod away from the support rod. The surface of the support plate has a movable groove for the connecting column to move. An arc-shaped locking block is provided in the inner cavity of the movable groove to limit and lock the connecting column. There are two deformable armrest support assemblies, which are respectively installed on the top of the support plate.

[0007] Furthermore, the connecting column is rotatably connected to the end of the two connecting rods on the same side away from the support rod, and the connecting column rolls within the inner cavity of the movable groove.

[0008] Furthermore, the arc-shaped locking block slides up and down in the inner cavity of the support plate and extends into the inner cavity of the movable groove. A lever is fixedly installed on the opposite side of the arc-shaped locking block, and the lever extends to the outer side of the support plate.

[0009] Furthermore, the deformable handrail support assembly includes a main handrail support fixedly installed on the top of the support plate, and movable support plates are installed on the opposite side of the main handrail support. The movable support plates are detachably installed on the top, bottom and opposite side of the main handrail support.

[0010] Furthermore, a plug is fixedly installed on the side of the movable support plate near the main armrest support plate, and a slot is opened through the top of the opposite end of the main armrest support plate. A slot for cooperating with the plug is also opened on the opposite side of the main armrest support plate.

[0011] Furthermore, a rotating rod is rotatably connected to one of the opposite ends of the front and rear sides of the main armrest support plate. Movable cavities that cooperate with the rotating rods are opened at both the front and rear ends of the movable support plate. The end of the rotating rod away from the main armrest support plate slides in the inner cavity of the movable cavity. A spring is fixedly installed between the rotating rod and the inner cavity of the movable cavity.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model, through the setting of a deformable handrail support plate assembly, changes the shape of the handrail support plate to meet different needs, effectively preventing the user's arm from slipping. When used with connecting rods and arc-shaped locking blocks, the entire support plate can be locked or unlocked, improving the stability of the handrail during use. 2. By adjusting the position of the movable slot, this utility model allows the support plate to be folded and rotated upwards or downwards, providing flexibility to choose the appropriate method based on requirements. Attached Figure Description

[0013] The disclosure of this utility model is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings, the same reference numerals are used to refer to the same parts. Wherein: Figure 1 This is a right-side view illustration of one embodiment of the present invention. Figure 1 ; Figure 2 This is one embodiment of the present utility model. Figure 1 Enlarged view of point A in the middle; Figure 3 This is a three-dimensional schematic diagram of a deformable handrail support plate assembly and a support plate according to an embodiment of the present invention. Figure 1 ; Figure 4 This is a three-dimensional schematic diagram of a deformable handrail support plate assembly and a support plate according to an embodiment of the present invention. Figure 2 ; Figure 5 This is a three-dimensional disassembled schematic diagram of a deformable handrail support plate assembly and a support plate according to an embodiment of the present invention; Figure 6 This is a right-side view illustration of one embodiment of the present invention. Figure 2 .

[0014] The attached diagram lists the components represented by each number as follows: 1. Wheelchair body; 2. Support rod; 3. Support plate; 4. Connecting rod; 5. Connecting column; 6. Movable groove; 7. Arc-shaped locking block; 81. Main armrest support plate; 82. Movable support plate; 83. Rotating rod; 84. Movable cavity; 85. Spring; 86. Insertion block; 87. Slot; 9. Pulley block. Detailed Implementation

[0015] It is readily understood that, based on the technical solution of this utility model, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of this utility model. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative descriptions of the technical solution of this utility model and should not be considered as the entirety of this utility model or as limitations or restrictions on the technical solution of this utility model.

[0016] In the following description, embodiments of the lockable armrests of the wheelchair of the present invention will be described with reference to the accompanying drawings.

[0017] Figures 1-6 This invention illustrates a lockable armrest for a wheelchair according to an embodiment of the present invention, comprising: Support rods 2 are fixedly installed on the left and right sides of the wheelchair body 1. A support plate 3 is rotatably connected to the top of each support rod 2. Connecting rods 4 are rotatably connected to both sides of each support rod 2. A connecting column 5 is installed at the end of each connecting rod 4 away from the support rod 2. The surface of the support plate 3 has movable grooves 6 for the connecting columns 5 to move. The position of the movable grooves 6 varies, such as... Figure 1 and Figure 6It can achieve two ways of folding and rotating the support plate 3 upward or downward, and can be flexibly selected according to the needs. Specifically, the connecting column 5 is rotatably connected to the end of the two connecting rods 4 on the same side away from the support rod 2. The connecting column 5 rolls in the inner cavity of the movable groove 6. The inner cavity of the movable groove 6 is provided with an arc-shaped locking block 7, which limits and locks the connecting column 5. Specifically, the arc-shaped locking block 7 slides up and down in the inner cavity of the support plate 3 and extends into the inner cavity of the movable groove 6. A lever 9 is fixedly installed on the opposite side of the arc-shaped locking block 7, and the lever 9 extends to the outside of the support plate 3. This also includes two deformable handrail support assemblies, each mounted on the top of the support plate 3. Specifically, each deformable handrail support assembly includes a main handrail support plate 81 fixedly mounted on the top of the support plate 3, and movable support plates 82 mounted on opposite sides of the main handrail support plate 81. The movable support plates 82 are detachably mounted on the top, bottom, and opposite sides of the main handrail support plate 81. Specifically, the opposite ends of the front and rear sides of the main handrail support plate 81 can rotate. A rotating rod 83 is connected to the movable support plate 82. Both the front and rear ends of the movable support plate 82 are provided with movable cavities 84 that cooperate with the rotating rod 83. The end of the rotating rod 83 away from the main armrest support plate 81 slides in the inner cavity of the movable cavity 84. A spring 85 is fixedly installed between the rotating rod 83 and the inner cavity of the movable cavity 84. Specifically, a plug 86 is fixedly installed on the side of the movable support plate 82 near the main armrest support plate 81. A slot 87 is provided through the top of the opposite end of the main armrest support plate 81. A slot 87 that cooperates with the plug 86 is also provided on the opposite side of the main armrest support plate 81. The slot 87 allows the movable support plate 82 to be installed on the top, side, or bottom of the main armrest support plate 81. When the movable support plate 82 is installed at the bottom of the main armrest support plate 81, the movable support plate 82 and the main armrest support plate 81 form an inverted L-shape, and the main armrest support plate 81 is at its normal width. When the movable support plate 82 is installed on the side of the main armrest support plate 81, such as... Figure 4 As shown, the main armrest support plate 81 can be extended and widened to provide greater support for the user's hands; when the movable support plate 82 is installed on top of the main armrest support plate 81, as... Figure 3 As shown, the movable support plate 82 and the main armrest support plate 81 are L-shaped, which can block the user's elbows and arms and effectively prevent the user's arms from slipping.

[0018] Working principle: When using this invention, the user slides the lever 9 upwards, causing the arc-shaped locking block 7 to slide upwards within the inner cavity of the support plate 3, thereby disengaging from the inner cavity of the movable groove 6 and releasing the limiting lock on the connecting column 5. Subsequently, the user rotates the support plate 3 upwards or downwards, causing the connecting column 5 to roll within the inner cavity of the movable groove 6, thereby causing the support plate 3 to rotate on the surface of the support rod 2. This facilitates entry and exit from the side of the wheelchair for users with relatively limited mobility. Simultaneously, after the support plate 3 is reset, the support rod 2, support plate 3, and connecting rod 4 form a relatively stable structure. The triangular structure improves the stability of the deformable armrest support assembly. When the shape of the deformable armrest support assembly needs to be changed, the movable support plate 82 is pulled to drive the rotating rod 83 to slide in the inner cavity of the movable cavity 84 and stretch the spring 85, thereby causing the insert 86 to disengage from the inner cavity of the slot 87. Then, the movable support plate 82 is rotated and the insert 86 is reinserted into the inner cavity of the corresponding slot 87 as needed, so that the main armrest support plate 81 and the movable support plate 82 form different shapes such as straight, L-shaped or inverted L-shaped to meet the needs of different users.

[0019] In summary, the lockable armrest of this wheelchair, through the setting of the deformable armrest support assembly, changes the shape of the armrest support to meet different needs, effectively preventing the user's arm from slipping. When used in conjunction with the connecting rod 4 and the arc-shaped locking block 7, the entire support plate 3 can be locked or unlocked, improving the stability of the armrest during use.

[0020] The technical scope of this utility model is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this utility model, and all such modifications and variations should fall within the protection scope of this utility model.

Claims

1. A lockable armrest for a wheelchair, characterized in that, include: Support rods (2) are fixedly installed on the left and right sides of the wheelchair body (1). A support plate (3) is rotatably connected to the top of the support rod (2). A connecting rod (4) is rotatably connected to both the left and right sides of the support rod (2). A connecting column (5) is installed at the end of the connecting rod (4) away from the support rod (2). An movable groove (6) for the connecting column (5) to move is opened on the surface of the support plate (3). An arc-shaped locking block (7) is provided in the inner cavity of the movable groove (6). The connecting column (5) is limited and locked by the arc-shaped locking block (7). Deformable handrail support assembly, the number of which is two, the deformable handrail support assembly is respectively installed on the top of the support plate (3).

2. The lockable armrest of a wheelchair according to claim 1, characterized in that: The connecting column (5) is rotatably connected to the end of the two connecting rods (4) on the same side away from the support rod (2), and the connecting column (5) rolls in the inner cavity of the movable groove (6).

3. The lockable armrest of a wheelchair according to claim 1, characterized in that: The arc-shaped locking block (7) slides up and down in the inner cavity of the support plate (3) and extends into the inner cavity of the movable groove (6). A lever (9) is fixedly installed on the opposite side of the arc-shaped locking block (7), and the lever (9) extends to the outer side of the support plate (3).

4. The lockable armrest of a wheelchair according to claim 1, characterized in that: The deformable handrail support assembly includes a main handrail support (81) fixedly installed on the top of the support plate (3). Movable support plates (82) are installed on the opposite side of the main handrail support (81). The movable support plates (82) are detachably installed on the top, bottom and opposite side of the main handrail support (81).

5. A lockable armrest for a wheelchair according to claim 4, characterized in that: The movable support plate (82) is fixedly installed with a plug (86) on the side near the main armrest support plate (81). A slot (87) is opened through the top of the opposite end of the main armrest support plate (81). A slot (87) that works with the plug (86) is also opened on the opposite side of the main armrest support plate (81).

6. A lockable armrest for a wheelchair according to claim 4, characterized in that: The main armrest support plate (81) has a rotating rod (83) rotatably connected to one end of each side of the front and rear sides. The movable support plate (82) has movable cavities (84) at both ends of the front and rear sides that cooperate with the rotating rod (83). The end of the rotating rod (83) away from the main armrest support plate (81) slides in the inner cavity of the movable cavity (84). A spring (85) is fixedly installed between the rotating rod (83) and the inner cavity of the movable cavity (84).

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