Electric wheelchair convenient to sit up and down

Abstract

The invention belongs to the technical field of electric wheelchairs, and relates to an electric wheelchair convenient to sit up and down, which comprises a wheelchair base, and universal rollers and electric rollers which are arranged at the lower part of the wheelchair base, and a support plate frame is arranged at the upper part of the wheelchair base through a swing arm unit; the swing arm unit is suitable for driving the supporting plate frame to rotate and swing in a horizontal state, and a leg supporting plate is rotationally arranged at the end, close to the universal wheels, of the supporting plate frame. The two backrest plates are unfolded away from each other, the electric rolling wheels are transferred to be close to the bedside or the sofa side, the patient is transferred to the supporting plate frame and the leg supporting plate in the sitting direction under the assistance of a nurse, then the two hip sitting plates are close to each other for the patient to further sit, and meanwhile the two backrest plates are close to each other for the patient to lean on. Therefore, the patient does not need to frequently turn the position right facing the backrest plate to sit, the carrying and holding pressure of the nurse is relieved, and the convenience of sitting up and down is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of electric wheelchairs, and more particularly, relates to an electric wheelchair that facilitates getting on and off. Background Art

[0002] Electric wheelchairs are tools invented for the elderly and disabled who have difficulty moving. Although traditional electric wheelchairs provide great convenience in terms of mobility and assisting movement, there are still some challenges during the process of getting on and off. Most of the time, assistance is required for getting on and off, making the operation inconvenient.

[0003] For example, the patent with the patent publication number CN102755230B discloses an electric wheelchair, which is the same as the electric wheelchairs in the prior art. Although it realizes the function of assisting movement, when a patient needs to take a seat, firstly, others are required to lift and assist in getting on and off, and secondly, when placing it, it is facing the patient directly, and the patient needs to turn around in a cumbersome manner in the direction facing the backrest board to take a seat.

[0004] Based on the above-mentioned disadvantages in the prior art, an electric wheelchair that facilitates getting on and off is specifically designed to overcome the disadvantages of the prior art, enabling a patient to directly take a seat from a bed or a sofa in the sitting direction. Summary of the Invention

[0005] The purpose of the present invention is to overcome the above-mentioned disadvantages of the prior art and provide an electric wheelchair that facilitates getting on and off, enabling a patient to directly take a seat from a bed or a sofa in the sitting direction.

[0006] To solve the above technical problems, the present invention provides such an electric wheelchair that facilitates getting on and off, which includes a wheelchair base, two universal rollers provided at the lower part of the wheelchair base, and two electric rollers located to the left of the universal rollers. The upper part of the wheelchair base is provided with a support plate frame through a swing arm unit. The swing arm unit is adapted to drive the support plate frame to rotate and swing in a horizontal state. At one end of the support plate frame close to the universal rollers, a leg support plate for supporting the legs is rotatably provided, and the leg support plate is driven to rotate by a first rotation drive group provided on the support plate frame; at one end of the support plate frame close to the electric rollers, two hip sitting plates for supporting the hips are rotatably provided. The rotation direction of the hip sitting plates is perpendicular to the rotation direction of the leg support plate, and the two front and rear opposite hip sitting plates are respectively driven by two front and rear opposite unfolding drive groups provided on the support plate frame to rotate towards each other. Backrest plates for supporting the back are vertically provided on both hip sitting plates.

[0007] Preferably, there are two sets of swing arm units which are opposite to each other front and back. The swing arm unit includes two rotating rods at different horizontal positions between the wheelchair base and the support plate frame. A connecting rod for synchronous transmission is rotatably arranged between the two rotating rods. An electric telescopic rod is installed on the wheelchair base, and the telescopic end of the electric telescopic rod is hinged to one of the two rotating rods.

[0008] Preferably, the leg support plate is composed of a leg rest plate rotatably arranged on the support plate frame and two foot pads perpendicular to the leg rest plate; the first rotation drive group includes a first missing gear connected to the front and rear ends of the leg rest plate. A double-shaft motor is installed on the support plate frame, and a first driving gear is connected to each of the two output shafts of the double-shaft motor. The two first driving gears are respectively meshed with the two first missing gears.

[0009] Preferably, the unfolding drive group includes an arc-shaped slide bar connected to the lower side of the hip sitting plate. The arc-shaped slide bar is slidably arranged on the upper part of the support plate frame. One side of the arc-shaped slide bar has a toothed part. The center of the arc-shaped slide bar is concentric with the fulcrum of the hip sitting plate rotating on the support plate frame. A servo motor is installed on the support plate frame, and a spur gear meshed with the toothed part on the arc-shaped slide bar is connected to the output shaft of the servo motor.

[0010] Preferably, it further includes a rotating frame arranged on the backrest plate. The rotating frame is rotatably arranged on the hip sitting plate. The backrest plate rotates on the hip sitting plate through the rotating frame. The rotation direction of the rotating frame is perpendicular to the rotation direction of the hip sitting plate. The two rotating frames are respectively driven to rotate by two second rotation drive groups arranged on the hip sitting plate.

[0011] Preferably, the second rotation drive group includes a second missing gear connected to the end of the rotating frame. Driving motors are installed on both hip sitting plates, and a second driving gear meshed with the second missing gear is connected to the output shaft of the driving motor.

[0012] Preferably, it further includes a first connection structure and a second connection structure. The backrest plate is rotatably arranged on the rotating frame. A first connection structure is arranged on one side of one backrest plate, and a second connection structure for connecting with the first connection structure is arranged on one side of the other backrest plate.

[0013] Preferably, the first connection structure is a card slot opened on one of the backrest plates, and the second connection structure is a wedge block slidably arranged on the other backrest plate. The wedge block is adapted to be inserted into the card slot. A spring is connected between the wedge block and the backrest plate. Openings are opened on one side of both backrest plates.

[0014] Preferably, it further includes a first guardrail and a second guardrail. The first guardrails are connected to the front and rear ends of the support plate frame, and the second guardrails are connected to the upper sides of both hip sitting plates.

[0015] The beneficial effects that the present invention can achieve on the basis of overcoming the shortcomings of the prior art are: Unfold the two backrest plates away from each other, transfer the electric rollers close to the edge of the bed or the sofa, and then the patient is transferred to the support plate frame and the leg support plate in the direction of sitting with the assistance of the caregiver. Then, move the two hip sitting plates closer to each other for the patient to sit on further, and at the same time, move the two backrest plates closer to each other for the patient to lean on. Thus, it is not necessary for the patient to turn around in the direction facing the backrest plate complicatedly to sit, reducing the carrying pressure on the caregiver and improving the convenience of getting on and off. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is an assembly schematic diagram of the present invention.

[0017] Figure 2 It is a schematic diagram of the rotating rod, connecting rod and electric telescopic rod of the present invention.

[0018] Figure 3 It is a schematic diagram of the state when the leg rest plate is parallel to the support plate frame of the present invention.

[0019] Figure 4 It is a schematic diagram of the state when the two hip sitting plates are rotated and unfolded of the present invention.

[0020] Figure 5 For the present invention Figure 4 Enlarged view of part A.

[0021] Figure 6 It is a schematic diagram of the present invention in a lying flat state.

[0022] Figure 7 It is a schematic diagram of the state when the backrest plate is parallel to the support plate frame of the present invention.

[0023] Figure 8 It is a schematic diagram of the second missing gear, drive motor and second driving gear of the present invention.

[0024] Figure 9 It is a cross-sectional view of the rear side direction of the backrest plate of the present invention.

[0025] Figure 10 It is a top view of the wedge block and spring of the present invention.

[0026] The reference signs in the accompanying drawings provided by the present invention are: 1 - wheelchair base, 11 - universal rollers, 12 - electric rollers, 2 - swing arm unit, 21 - rotating rod, 22 - connecting rod, 23 - electric telescopic rod, 3 - support plate frame, 4 - leg support plate, 41 - leg rest plate, 42 - foot pad, 40 - first rotation drive group, 43 - first missing gear, 44 - dual-axis motor, 45 - first driving gear, 5 - hip sitting plate, 50 - unfolding drive group, 51 - arc-shaped slide bar, 52 - tooth part, 53 - servo motor, 54 - spur gear, 6 - backrest plate, 61 - rotating frame, 60 - second rotation drive group, 62 - second missing gear, 63 - driving motor, 64 - second driving gear, 65 - wedge block, 66 - spring, 71 - first guardrail, 72 - second guardrail. Detailed implementation manners

[0027] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0028] In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. It should be noted that the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0029] An electric wheelchair facilitating getting on and off, such as Figure 1 and Figure 4As shown in the figure, it includes a wheelchair base 1, two universal rollers 11 provided at the lower part of the wheelchair base 1, and two electric rollers 12 located to the left of the universal rollers 11. The upper part of the wheelchair base 1 is provided with a support plate frame 3 through a swing arm unit 2. The swing arm unit 2 is adapted to drive the support plate frame 3 to rotate and swing in a horizontal state. A leg support plate 4 for supporting the legs is rotatably provided at one end of the support plate frame 3 close to the universal rollers 11. The leg support plate 4 is driven to rotate by a first rotation drive group 40 provided on the support plate frame 3, so as to automatically adjust the support angle of the leg support plate 4 for the patient's legs, making it more comfortable to use. Control the swing arm unit 2 to drive the support plate frame 3 to rotate and swing in a horizontal state, so that the support plate frame 3 will drive the leg support plate 4 to adjust the height at a fixed angle, and the usage method is diversified; two hip sitting plates 5 for supporting the hips are rotatably provided at one end of the support plate frame 3 close to the electric rollers 12. The rotation direction of the hip sitting plates 5 is perpendicular to the rotation direction of the leg support plate 4. Two front and rear opposite unfolding drive groups 50 provided on the support plate frame 3 respectively drive two front and rear opposite hip sitting plates 5 to rotate towards each other. Backrest plates 6 for supporting the back are vertically provided on both hip sitting plates 5. (As Figure 4 ), the two hip sitting plates 5 that unfold away from each other will drive the two backrest plates 6 to unfold away from each other. Control the swing arm unit 2 to drive the support plate frame 3 to rotate counterclockwise and approach the electric rollers 12. At this time, transfer the electric rollers 12 to be close to the edge of the bed or the sofa, and the patient can directly transfer to the support plate frame 3 and the leg support plate 4 in the sitting direction with the assistance of the caregiver. Then slightly lift the patient's hips, and then control the unfolding drive group 50 to drive the two hip sitting plates 5 to approach each other for the patient to sit further, and at the same time the two backrest plates 6 approach each other for the patient to rely on, thus eliminating the need for the patient to turn around in a cumbersome manner in the direction facing the backrest plate 6 for sitting, improving convenience.

[0030] Working principle: When sitting is required, control the first rotation drive group 40 to drive the leg support plate 4 to rotate to adjust the placement angle of the patient's legs, and control the unfolding drive group 50 to make the two hip sitting plates 5 drive the two backrest plates 6 to rotate and unfold respectively. At this time, the patient can directly transfer to the support plate frame 3 and the leg support plate 4 in the sitting direction from the position where the two backrest plates 6 rotate and unfold with the assistance of the caregiver, without the need to turn around in a cumbersome manner facing the backrest plate 6 for sitting. Then control the unfolding drive group 50 to drive the two hip sitting plates 5 to drive the two backrest plates 6 to reset to support the patient's hips and back.

[0031] As Figure 2As shown in the figure, there are two sets of swing arm units 2, which are opposite to each other in the front and back. The swing arm unit 2 includes two rotating rods 21 at different horizontal positions between the wheelchair base 1 and the support plate frame 3. The support plate frame 3 is kept in a horizontal state by the two rotating rods 21 at different horizontal positions. A connecting rod 22 for synchronous transmission is rotated between the two rotating rods 21. An electric telescopic rod 23 is installed on the wheelchair base 1. The telescopic end of the electric telescopic rod 23 is hinged to one of the two rotating rods 21. By controlling the telescopic movement of the electric telescopic rod 23, the electric telescopic rod 23 will drive one of the rotating rods 21 to swing. The swinging rotating rod 21 will drive the other rotating rod 21 to swing through the connecting rod 22. In this way, the two rotating rods 21 synchronously drive the support plate frame 3 to swing in a turnover motion while maintaining a horizontal state, so as to stably support the patient and be able to adjust the patient's sitting position.

[0032] As Figure 3 shown in the figure, the leg support plate 4 is composed of a leg rest plate 41 rotatably arranged on the support plate frame 3 and two foot pads 42 perpendicular to the leg rest plate 41. The leg rest plate 41 supports the lower leg, and the foot pads 42 support the soles of the feet; the first rotation drive group 40 includes a first missing gear 43 connected to the front and rear ends of the leg rest plate 41. A dual-axis motor 44 is installed on the support plate frame 3. The two output shafts of the dual-axis motor 44 are respectively connected with a first driving gear 45. The two first driving gears 45 are respectively meshed with the two first missing gears 43. By controlling the dual-axis motor 44 to drive the first driving gear 45 to rotate and mesh with the first missing gear 43, the first missing gear 43 will drive the foot pads 42 to rotate through the leg rest plate 41, so as to automatically adjust the support angle for the patient's legs.

[0033] As Figure 4 and Figure 5 shown in the figure, the unfolding drive group 50 includes an arc-shaped slide bar 51 connected to the lower side of the hip sitting plate 5. The arc-shaped slide bar 51 is slidably arranged on the upper part of the support plate frame 3. One side of the arc-shaped slide bar 51 has a toothed part 52. The center of the arc-shaped slide bar 51 is concentric with the fulcrum of the hip sitting plate 5 rotating on the support plate frame 3. A servo motor 53 is installed on the support plate frame 3. The output shaft of the servo motor 53 is connected with a spur gear 54 meshed with the toothed part 52 on the arc-shaped slide bar 51. By controlling the servo motor 53 to drive the spur gear 54 to rotate and mesh with the toothed part 52, the toothed part 52 will drive the hip sitting plate 5 to rotate with the support plate frame 3 as the fulcrum, so as to automatically open and close the hip sitting plate 5 for the patient to get on and off conveniently.

[0034] As Figure 6 and Figure 7As shown in the figure, it further includes a rotating frame 61 provided on the backrest plate 6. The rotating frame 61 is rotatably provided on the hip sitting plate 5. The backrest plate 6 rotates on the hip sitting plate 5 through the rotating frame 61. The rotation direction of the rotating frame 61 is perpendicular to the rotation direction of the hip sitting plate 5. The two backrest plates 6 are driven by the two rotating frames 61 to rotate synchronously, so as to adjust the support angle of the backrest plate 6 for the patient's back, thereby further improving the comfort of the patient according to the patient's needs. The two rotating drive groups two 60 provided on the hip sitting plate 5 respectively drive the two rotating frames 61 to rotate. (As Figure 6 ) When both the backrest plate 6 and the leg rest plate 41 rotate to be parallel to the hip sitting plate 5, not only can it support in a lying position, but for patients who are inconvenient to get on and off in a sitting position, when the electric roller 12 is transferred to be close to the edge of the bed or the sofa, the backrest plate 6 can be supported on the bed or the sofa, and then with the assistance of the caregiver, the patient can get on and off in a lying position. Rotating the rotating frame 61 to drive the backrest plate 6 to stand up can change the patient from a lying state to a sitting state.

[0035] As Figure 7 and Figure 8 shown, the rotating drive group two 60 includes a second missing gear 62 connected to the end of the rotating frame 61. Driving motors 63 are installed on both hip sitting plates 5. The output shaft of the driving motor 63 is connected with a second driving gear 64 meshing with the second missing gear 62. Synchronously controlling the two driving motors 63 to drive the two second driving gears 64 to rotate and mesh with the two second missing gears 62, the second missing gear 62 will drive the backrest plate 6 to rotate into a standing and lying state through the rotating frame 61.

[0036] As Figure 9 shown, it further includes a first connection structure and a second connection structure. The backrest plate 6 is rotatably provided on the rotating frame 61. One side of one backrest plate 6 is provided with a first connection structure, and the other side of the other backrest plate 6 is provided with a second connection structure for connecting with the first connection structure. When the two backrest plates 6 approach each other, the first connection structure and the second connection structure are connected, thereby increasing the stability when the backrest plate 6 supports. Disconnecting the connection between the first connection structure and the second connection structure and rotating the two backrest plates 6 in a direction away from the hip sitting plate 5 can separately open the backrest plate 6, which is also convenient for the patient to get on and off when the electric roller 12 cannot get closer to the edge of the bed, with diverse usage methods and strong adaptability.

[0037] As Figure 9 and Figure 10As shown in the figure, the first connection structure is a card slot opened on one of the backrest plates 6, and the second connection structure is a wedge block 65 slidably arranged on the other backrest plate 6. The wedge block 65 is adapted to be inserted into the card slot. A spring 66 is connected between the wedge block 65 and the backrest plate 6. Openings are provided on one side of both backrest plates 6. The wedge block 65 is toggled through the openings to disengage the wedge block 65 from the card slot, so that the two backrest plates 6 are unlocked. On the contrary, when the backrest plate 6 with the card slot rotates close to the backrest plate 6 on which the wedge block 65 slides, the inclined surface of the wedge block 65 will be squeezed and contracted by the backrest plate 6. Subsequently, the wedge block 65 will be inserted into the card slot under the reset action of the spring 66 to lock the two backrest plates 6 together, thereby improving the stability during support.

[0038] As Figure 4 shown, it further includes a first guardrail 71 and a second guardrail 72. The first guardrail 71 is connected to both the front and rear ends of the support plate frame 3, and the second guardrail 72 is connected to the upper sides of both hip sitting plates 5. The two sides of the patient sitting on the chair are protected through the mutual cooperation between the second guardrail 72 and the first guardrail 71.

[0039] Obviously, the embodiments described above are only a part of the embodiments of the present invention, rather than all the embodiments. They only represent the preferred embodiments of the present invention, and the description is relatively specific and detailed. However, it should not be construed as a limitation to the scope of the present invention patent.

[0040] It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations, quantity increases or decreases, improvements and substitutions can be made. Therefore, based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

Claims

1. An electric wheelchair that is convenient for getting on and off, characterized in that, It includes a wheelchair base (1), universal wheels (11) and electric rollers (12) provided at the lower part of the wheelchair base (1). The upper part of the wheelchair base (1) is provided with a support plate frame (3) through a swing arm unit (2). The swing arm unit (2) is adapted to drive the support plate frame (3) to swing in a turnover motion while maintaining a horizontal state. One end of the support plate frame (3) close to the universal wheels (11) is rotatably provided with a leg support plate (4), and the leg support plate (4) is driven to rotate by a first rotation drive group (40) provided on the support plate frame (3). Two hip sitting plates (5) are rotatably provided at one end of the support plate frame (3) close to the electric rollers (12). The rotation direction of the hip sitting plates (5) is perpendicular to the rotation direction of the leg support plate (4). The two hip sitting plates (5) are respectively driven by two unfolding drive groups (50) provided on the support plate frame (3) to rotate towards each other, and a backrest plate (6) is vertically provided on each of the two hip sitting plates (5).

2. The electric wheelchair convenient for getting on and off as claimed in claim 1, wherein, The swing arm unit (2) includes two rotating rods (21) provided at different horizontal positions between the wheelchair base (1) and the support plate frame (3). A connecting rod (22) for synchronous transmission is rotatably provided between the two rotating rods (21). An electric telescopic rod (23) is installed on the wheelchair base (1), and the telescopic end of the electric telescopic rod (23) is hinged to one of the two rotating rods (21).

3. The electric wheelchair convenient for getting on and off as claimed in claim 1, wherein, The leg support plate (4) is composed of a leg rest plate (41) rotatably provided on the support plate frame (3) and two foot pads (42) perpendicular to the leg rest plate (41). The first rotation drive group (40) includes a first missing gear (43) connected to both ends of the leg rest plate (41). A dual-axis motor (44) is installed on the support plate frame (3), and a first driving gear (45) is connected to each of the two output shafts of the dual-axis motor (44). The two first driving gears (45) are respectively engaged with the two first missing gears (43).

4. The electric wheelchair convenient for getting on and off as claimed in claim 3, wherein, The unfolding drive group (50) includes an arc-shaped slide bar (51) connected to the hip sitting plate (5). The arc-shaped slide bar (51) is slidably provided on the support plate frame (3). One side of the arc-shaped slide bar (51) has a toothed part (52). A servo motor (53) is installed on the support plate frame (3), and a spur gear (54) engaged with the toothed part (52) on the arc-shaped slide bar (51) is connected to the output shaft of the servo motor (53).

5. The electric wheelchair convenient for getting on and off as claimed in claim 1, wherein, It further includes a rotating frame (61) provided on the backrest plate (6). The rotating frame (61) is rotatably provided on the hip sitting plate (5). The backrest plate (6) rotates on the hip sitting plate (5) through the rotating frame (61). The rotation direction of the rotating frame (61) is perpendicular to the rotation direction of the hip sitting plate (5), and the two rotating frames (61) are respectively driven to rotate by two second rotation drive groups (60) provided on the hip sitting plate (5).

6. The electric wheelchair convenient for getting on and off as claimed in claim 5, wherein, The second rotation drive group (60) includes a missing gear two (62) connected to the end of the turntable (61). Drive motors (63) are installed on both of the hip sitting plates (5), and the output shaft of the drive motor (63) is connected to a driving gear two (64) that meshes with the missing gear two (62).

7. An electric wheelchair convenient for getting on and off, according to claim 5, wherein, It further includes a first connection structure and a second connection structure. The backrest plate (6) is rotatably arranged on the turntable (61). The first connection structure is arranged on one side of one of the backrest plates (6), and the second connection structure for connecting to the first connection structure is arranged on one side of the other backrest plate (6).

8. The electric wheelchair convenient for getting on and off as claimed in claim 7, wherein, The first connection structure is a card slot opened on one of the backrest plates (6), and the second connection structure is a wedge block (65) slidably arranged on the other backrest plate (6). The wedge block (65) is adapted to be inserted into the card slot. A spring (66) is connected between the wedge block (65) and the backrest plate (6), and openings are formed on one side of both of the backrest plates (6).

9. The electric wheelchair convenient for getting on and off as claimed in claim 1, wherein, It further includes a first guardrail (71) and a second guardrail (72). The first guardrail (71) is connected to both ends of the support plate frame (3), and the second guardrail (72) is connected to both of the hip sitting plates (5).

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