Electric adjusting device for wheelchair backrest

Abstract

The utility model discloses an electric adjusting device for a wheelchair backrest, which relates to the technical field of wheelchairs and comprises a chair frame, an adjusting component is arranged in the chair frame, two L-shaped back rods are arranged at the top of the adjusting component, and a handle component is arranged between the ends of the two L-shaped back rods. The handle assembly comprises a connecting rod fixedly connected between the rear ends of the two L-shaped back rods, protruding blocks are symmetrically and fixedly connected to the outer wall of the connecting rod, and rotating plates are further symmetrically arranged on the connecting rod. According to the electric adjusting device for the wheelchair backrest, the rotating plate is operated to slide on the connecting rod, so that the groove is separated from the protruding block, then the handle rod can be rotated, the angle of the handle is adjusted to the comfortable height, the requirements for the height of the handle in different scenes are met, and after the height of the handle rod is adjusted, the groove in the rotating plate is clamped with the protruding block; and therefore, the rotating plate can be fixed, and the stability of the barre is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a wheelchair technical field, concretely is a kind of wheelchair backrest electric adjusting device. BACKGROUND

[0002] As an important mobile auxiliary tool for people with difficulty in moving, the comfort and functionality of wheelchair are crucial.

[0003] In the prior art, as disclosed in CN219148257U, a wheelchair backrest electric adjusting device is disclosed, which comprises a backrest with a door-shaped frame body, so that the backrest bottom has no frame, and when leaning, the bottom frame does not touch the human back, causing discomfort. The end of the frame body is provided with a bending part bent outward, so that the frame body does not collide with the human body, scratches the human body, and the backrest and the wheelchair main body are stored in the back side and the upper part, eliminating the safety hazard of pinching the person.

[0004] Based on the above prior art, when the angle of the backrest changes, the height of the handle located at the back side of the backrest will also change. When the accompanying person needs to push or assist the wheelchair by the handle behind the backrest, if the height of the handle is not suitable, the pushing process will feel difficult. Therefore, the utility model provides a wheelchair backrest electric adjusting device. UTILITY MODEL CONTENTS

[0005] In view of the shortcomings of the prior art, the utility model provides a wheelchair backrest electric adjusting device, which solves the problem that when the angle of the backrest changes, the height of the handle located at the back side of the backrest will also change, and when the accompanying person needs to push or assist the wheelchair by the handle behind the backrest, if the height of the handle is not suitable, the pushing process will feel difficult.

[0006] To achieve the above purpose, the utility model is realized by the following technical scheme: a wheelchair backrest electric adjusting device, comprising a chair frame, the chair frame is provided with an adjusting assembly inside, the adjusting assembly is provided with two L-shaped back rods on the top, and a handle assembly is provided between the end portions of the two L-shaped back rods; the handle assembly comprises a connecting rod fixedly connected between the rear ends of the two L-shaped back rods, the outer wall of the connecting rod is fixedly connected with a protrusion symmetrically, a rotating plate is also provided symmetrically on the connecting rod, a circular hole is formed through the outer wall of the rotating plate, the circular hole can slide tightly along the outer wall of the connecting rod, a groove is formed in the inner wall of the circular hole and matched with the protrusion, and a handle bar is fixedly connected between the opposite side surfaces of the two rotating plates.

[0007] Preferably, a bearing ring is sleeved on the position between the two protrusions on the outer wall of the connecting rod, and a support sleeve is fixedly sleeved on the outer wall of the bearing ring.

[0008] Preferably, the connecting rod outer wall is fixed with a limiting plate near the right end, for limiting one of the rotating plates, and a spring is fixedly connected between the supporting sleeve and the rotating plate.

[0009] Preferably, the chair frame top is provided with a seat plate, and a back plate is arranged between the two L-shaped back rods.

[0010] Preferably, the adjusting assembly comprises a fixed rod installed in the chair frame, and an electric push rod is rotatably arranged on the outer wall of the fixed rod.

[0011] Preferably, a rotating shaft is rotatably arranged near the rear side of the chair frame, L-shaped fixed plates are symmetrically fixedly connected to the outer wall of the rotating shaft, a connecting arm is fixedly connected to the outer wall of the rotating shaft near the middle, the connecting arm is rotatably connected to the telescopic end of the electric push rod, a support is fixedly connected between the top surfaces of the two L-shaped fixed plates, and the support top surface is fixedly connected with the bottom end of the L-shaped back rod.

[0012] Beneficial effects

[0013] The utility model provides a kind of wheelchair backrest electric adjusting device.Compared with prior art, it has the following beneficial effects:

[0014] 1, the wheelchair backrest electric adjusting device, by operating rotating plate sliding on connecting rod, recess and protrusion are separated, then can rotate handlebar, to this adjustment handlebar angle to comfortable height, meet the demand of handlebar height under different scenes, when handlebar height adjustment is completed, again recess and protrusion on rotating plate are engaged, so that rotating plate can be fixed, the stability of handlebar is improved.

[0015] 2, the wheelchair backrest electric adjusting device, when recess and protrusion are engaged, under the action of spring thrust, rotating plate is pushed and abuts against limiting plate, so that the stability of handlebar can be effectively avoided rotating plate sliding on connecting rod at will, when rotating plate turns, force is transmitted to supporting sleeve by spring, since supporting sleeve is sleeved on bearing ring, rotating motion is passed through bearing ring, auxiliary rotating plate rotates more smoothly, avoid the problem that spring occurs excessive distortion. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the three-dimensional appearance schematic view of the utility model;

[0017] Figure 2 It is another view structural schematic view of the utility model;

[0018] Figure 3 It is the fixed rod three-dimensional appearance schematic view of the utility model;

[0019] Figure 4 It is the partial structure exploded view of the utility model;

[0020] Figure 5 For the utility model Figure 4 The enlarged view of A in the utility model.

[0021] In the drawing: 1, chair frame; 11, seat plate; 2, adjusting assembly; 21, fixed rod; 22, electric push rod; 23, rotating shaft; 24, L-shaped fixed plate; 25, connecting arm; 26, support; 3, L-shaped back rod; 31, back plate; 4, handle assembly; 41, connecting rod; 42, protrusion; 43, rotating plate; 44, circular hole; 441, recess; 45, handle rod; 46, limiting plate; 47, bearing ring; 48, supporting sleeve; 49, spring. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0023] The utility model provides two technical schemes:

[0024] Figures 1-5 The first embodiment is shown: a wheelchair backrest electric adjusting device, including chair frame 1, chair frame 1 inside is equipped with adjusting assembly 2, adjusting assembly 2 top is equipped with two L-shaped back rod 3, and two L-shaped back rod 3 end-to-end is equipped with handle assembly 4;Handle assembly 4 includes the connecting rod 41 of fixed connection between the rear end of two L-shaped back rod 3, and the protrusion 42 of fixed connection is symmetrically arranged on the outer wall of connecting rod 41, and the rotating plate 43 is also symmetrically arranged on connecting rod 41, and the circular hole 44 is formed in the outer wall of rotating plate 43, and the circular hole 44 can be tightly attached to the outer wall of connecting rod 41 and slide, and the recess 441 matched with protrusion 42 is formed in the inner wall of circular hole 44, and the handle rod 45 is fixedly connected between the opposite side surfaces of two rotating plates 43.

[0025] Specifically, by sliding the rotating plate 43 on the connecting rod 41, the recess 441 is separated from the protrusion 42, and then the handle rod 45 can be rotated to adjust the handle angle to a comfortable height, meet the demand for handle height in different scenes, when the height adjustment of handle rod 45 is completed, the recess 441 on rotating plate 43 is engaged with protrusion 42, so that rotating plate 43 can be fixed, and the stability of handle rod 45 is improved.

[0026] In the embodiment, the outer wall of the connecting rod 41 is sleeved with a bearing ring 47 at the position between the two protrusions 42, and the outer wall of the bearing ring 47 is fixedly sleeved with a supporting sleeve 48. The outer wall of the connecting rod 41 is fixedly sleeved with a limiting plate 46 near the right end, which is used for limiting one of the rotating plates 43. The supporting sleeve 48 and one of the rotating plates 43 are fixedly connected with a spring 49.

[0027] Specifically, when the groove 441 is clamped with the protrusion 42, under the action of the pushing force of the spring 49, the rotating plate 43 is pushed to abut against the limiting plate 46, so that the rotating plate 43 can be effectively prevented from sliding randomly on the connecting rod 41, and the stability of the handle 45 is improved. When the rotating plate 43 rotates, the force is transmitted to the supporting sleeve 48 through the spring 49. Since the supporting sleeve 48 is sleeved on the bearing ring 47, the rotating movement of the bearing ring 47 can assist the rotating plate 43 to rotate more smoothly, and the problem of excessive distortion of the spring 49 is avoided.

[0028] The top of the chair frame 1 is provided with a seat plate 11, and the outer wall between the two L-shaped back rods 3 is provided with a back plate 31.

[0029] Figures 1-5 The second embodiment is shown, and the main difference from the first embodiment is that the adjusting assembly 2 comprises a fixed rod 21 installed in the inside of the chair frame 1, and the outer wall of the fixed rod 21 is rotatably provided with an electric push rod 22. The inside of the chair frame 1 is rotatably provided with a rotating shaft 23 near the rear side, the outer wall of the rotating shaft 23 is fixedly connected with L-shaped fixed plates 24 in a symmetrical manner, the outer wall of the rotating shaft 23 is fixedly connected with a connecting arm 25 near the middle, the connecting arm 25 is rotatably connected with the telescopic end of the electric push rod 22, and the top surface between the two L-shaped fixed plates 24 is fixedly connected with a bracket 26, and the top surface of the bracket 26 is fixedly connected with the bottom end of the L-shaped back rod 3.

[0030] Specifically, the electric push rod 22 is started to push the connecting arm 25 to move, thereby driving the rotating shaft 23 to rotate, so that the L-shaped fixed plates 24 and the bracket 26 connected to the rotating shaft 23 are operated, and the angle adjustment of the L-shaped back rod 3 and the back plate 31 is realized.

[0031] Meanwhile, the contents not described in detail in the specification all belong to the prior art known to those skilled in the art.

[0032] Working principle: through adjusting the electric push rod 22 in the assembly 2 starts, pushes the connecting arm 25 to move, and then drives the rotating shaft 23 to rotate, makes the L-shaped fixed plate 24 and the support 26 connected on the rotating shaft 23 work, realizes the angle adjustment of the L-shaped back rod 3 and the backrest 31, if the height of the handle 45 is not suitable after the backrest angle changes, through the operation of the rotating plate 43 on the connecting rod 41 sliding, makes the recess 441 and the protrusion 42 disengage, then can rotate the handle 45, so as to adjust the handle angle to the comfortable height, meet the demand of the handle height under different scenes, when the height adjustment of the handle 45 is completed, the recess 441 on the rotating plate 43 and the protrusion 42 are engaged, so that the rotating plate 43 can be fixed, improve the stability of the handle 45, when the recess 441 and the protrusion 42 are engaged, under the action of the spring 49 thrust, push the rotating plate 43 and the limiting plate 46 to resist, so as to effectively avoid the rotating plate 43 on the connecting rod 41 sliding randomly, further improve the stability of the handle 45.

[0033] It should be noted that the relational terms herein such as first and second and the like are used solely to distinguish one from another entity or action without necessarily requiring or implying that these entities or actions are in any way mutually exclusive or directional.

[0034] Although the embodiments of the present application have been shown and described, it is to be understood that for the purpose of the present application, the changes, modifications, replacements and variations of the embodiments can be made by those skilled in the art without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. An electrically powered backrest adjustment device for a wheelchair, comprising a chair frame (1), characterized in that: The chair frame (1) is internally provided with an adjusting assembly (2), and the top of the adjusting assembly (2) is provided with two L-shaped back rods (3), and a handle assembly (4) is arranged between the end portions of the two L-shaped back rods (3). The handle assembly (4) comprises a connecting rod (41) fixedly connected between the rear ends of the two L-shaped back rods (3), and the outer wall of the connecting rod (41) is symmetrically fixedly connected with a protruding block (42); the connecting rod (41) is also symmetrically provided with a rotating plate (43), and the outer wall of the rotating plate (43) is provided with a circular hole (44) penetrating therethrough; the circular hole (44) can slide tightly against the outer wall of the connecting rod (41); and the inner wall of the circular hole (44) is provided with a groove (441) matched with the protruding block (42), and the handle assembly (4) is further provided with a handle rod (45) fixedly connected between the opposite side surfaces of the two rotating plates (43).

2. A power backrest adjustment device for a wheelchair according to claim 1, characterized in that: The outer wall of the connecting rod (41) is sleeved with a bearing ring (47) at a position between the two protruding blocks (42), and the outer wall of the bearing ring (47) is fixedly sleeved with a supporting sleeve (48).

3. A power backrest adjustment device for a wheelchair according to claim 2, wherein: The outer wall of the connecting rod (41) is fixedly sleeved with a limiting plate (46) close to the right end, for limiting one of the rotating plates (43), and the supporting sleeve (48) and the one of the rotating plates (43) are fixedly connected with a spring (49).

4. The power backrest adjustment device for a wheelchair of claim 1, wherein: The top of the chair frame (1) is provided with a seat plate (11), and the outer walls of the two L-shaped back rods (3) are provided with a back plate (31) therebetween.

5. The power backrest adjustment device for a wheelchair of claim 1, wherein: The adjusting assembly (2) comprises a fixed rod (21) mounted in the chair frame (1), and the outer wall of the fixed rod (21) is rotatably provided with an electric push rod (22).

6. A power backrest adjustment device for a wheelchair according to claim 5, wherein: The inner portion of the chair frame (1) is rotatably provided with a rotating shaft (23) close to the rear side, the outer wall of the rotating shaft (23) is symmetrically fixedly connected with an L-shaped fixed plate (24), the outer wall of the rotating shaft (23) is fixedly connected with a connecting arm (25) close to the middle, the connecting arm (25) is rotatably connected with the telescopic end of the electric push rod (22), the top surfaces of the two L-shaped fixed plates (24) are fixedly connected with a support (26), and the top surface of the support (26) is fixedly connected with the bottom end of the L-shaped back rod (3).

Images