Folding wheelchair

Abstract

The utility model discloses a folding wheelchair which comprises a seat assembly, a backrest assembly, a connecting seat, a wheel beam assembly, a rocker arm assembly, a connecting rod assembly, a wheel arm assembly, a front wheel, a rear driving wheel assembly and a telescopic driving part. Wherein the front end portion of the wheel beam assembly and the upper end portion of the wheel arm assembly are coaxially hinged to the front end portion of the seat assembly, the lower end portion of the backrest assembly and the upper end portion of the connecting seat are coaxially hinged to the rear end portion of the seat assembly, the upper end portion of the rocker arm assembly is hinged to the lower end portion of the connecting seat, and the lower end portion of the rocker arm assembly is hinged to the rear end portion of the connecting seat. The lower end of the rocker arm assembly is hinged to the rear end of the wheel beam assembly, the front end of the connecting rod assembly is hinged to the lower end of the wheel arm assembly, and the rear end of the connecting rod assembly is hinged to the middle of the rocker arm assembly. According to the utility model, the backrest lying function can be realized, so that a user can lie flat and relax after sitting for a long time, the physical fatigue of the user after sitting for a long time can be relieved, and the user is more comfortable.

Description

Technical Field

[0001] The utility model relates to a folding wheelchair. Background Art

[0002] At present, folding wheelchairs can not only be used for the turnover transportation, medical treatment and outing of the sick and injured, but also can be folded and stored, which is very convenient to use. Therefore, folding wheelchairs are widely used in hospitals, rehabilitation centers and homes of the sick and injured. However, some existing folding wheelchairs cannot realize the backrest lying function. For example, a folding wheelchair disclosed in the Chinese patent with announcement number CN209203807U cannot realize the backrest lying function, resulting in the user being unable to lie flat and relax after sitting for a long time, and the user will feel physically tired and uncomfortable after sitting for a long time. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the defects of the prior art and provide a foldable wheelchair, which can realize the function of lying flat on the backrest, so that the user can lie flat and relax after sitting for a long time, can relieve the user's physical fatigue after sitting for a long time, and make the user more comfortable.

[0004] In order to solve the above technical problems, the technical solution of the utility model is: a folding wheelchair, which includes a seat assembly, a backrest assembly, a connecting seat, a wheel beam assembly, a rocker arm assembly, a connecting rod assembly, a wheel arm assembly, a front wheel, a rear drive wheel assembly and a telescopic drive component;

[0005] The front end portion of the wheel beam assembly and the upper end portion of the wheel arm assembly are coaxially hinged to the front end portion of the seat assembly;

[0006] The lower end of the backrest assembly and the upper end of the connecting seat are coaxially hinged on the rear end of the seat assembly;

[0007] The upper end of the rocker arm assembly is hinged to the lower end of the connecting seat;

[0008] The lower end of the rocker arm assembly is hinged to the rear end of the wheel beam assembly;

[0009] The front end of the connecting rod assembly is hinged to the lower end of the wheel arm assembly;

[0010] The rear end portion of the connecting rod assembly is hinged to the middle portion of the rocker arm assembly;

[0011] The front wheel is connected to the lower end of the wheel arm assembly;

[0012] The rear drive wheel assembly is connected to the rear end portion of the wheel beam assembly;

[0013] The lower end of the telescopic driving component is hinged to the connecting seat, and the upper end of the telescopic driving component is hinged to the backrest assembly. The telescopic driving component is used to drive the backrest assembly to rotate to an upright state or to drive the backrest assembly to rotate to a lying state during the telescopic process.

[0014] Further, the wheel beam assembly includes a left beam body, a right beam body and a cross beam, the left end of the cross beam is connected to the rear end of the left beam body, the right end of the cross beam is connected to the rear end of the right beam body, and the rear drive wheel assembly is connected to the cross beam;

[0015] The wheel arm assembly comprises a left wheel arm and a right wheel arm, the upper end of the left wheel arm, the front end of the left beam body, the upper end of the right wheel arm and the front end of the right beam body are coaxially hinged to the front end of the seat assembly, and the lower end of the left wheel arm and the lower end of the right wheel arm are respectively connected to the front wheel;

[0016] The rocker arm assembly includes a left rocker arm and a right rocker arm, and the connecting rod assembly includes a left connecting rod and a right connecting rod;

[0017] The upper end of the left rocker arm and the upper end of the right rocker arm are coaxially hinged on the lower end of the connecting seat;

[0018] The lower end of the left rocker arm is hingedly connected to the rear end of the left beam body around a first rotation axis, and the lower end of the right rocker arm is hingedly connected to the rear end of the right beam body around the first rotation axis;

[0019] The rear end of the left connecting rod is hingedly connected to the middle part of the left rocker arm around a second rotating shaft, and the rear end of the right connecting rod is hingedly connected to the middle part of the right rocker arm around the second rotating shaft;

[0020] The front end portion of the left connecting rod is hingedly connected to the lower end portion of the left wheel arm around a third rotating shaft, and the front end portion of the right connecting rod is hingedly connected to the lower end portion of the right wheel arm around the third rotating shaft.

[0021] A specific structure of the telescopic driving component is further provided, wherein the telescopic driving component is an electric cylinder or an electric push rod.

[0022] Furthermore, a storage bag is connected to the connecting rod assembly.

[0023] Furthermore, the folding wheelchair also includes a tow chain and a tension spring;

[0024] The drag chain and the tension spring are both arranged below the seat assembly, the front end of the tension spring is connected to the seat assembly, the rear end of the tension spring is connected to the front end of the drag chain, and the rear end of the drag chain is connected to the lower end of the backrest assembly.

[0025] A material for the drag chain is further provided, and the material for the drag chain is nylon.

[0026] Furthermore, an indicator light is connected to the rear end of the connecting seat, a first contact is provided on the indicator light, a second contact is connected to the seat assembly, and the first contact and the second contact are cooperatively connected to supply power to the indicator light.

[0027] A specific structure of the backrest assembly is further provided, wherein the backrest assembly comprises an aluminum alloy frame, a plastic outer frame and a backrest mesh;

[0028] The upper end of the connecting seat, the rear end of the seat assembly and the lower end of the aluminum alloy frame are coaxially hingedly connected;

[0029] The plastic outer frame is installed on the aluminum alloy frame;

[0030] The backrest mesh is installed on the plastic outer frame.

[0031] Furthermore, the rear portion of the plastic outer frame is connected to an audio unit.

[0032] Furthermore, the folding wheelchair also includes a headrest assembly; wherein, the upper end portion of the plastic outer frame is connected to a mounting block, and the headrest assembly is connected to the mounting block.

[0033] After adopting the above technical solution, the upper end of the rocker assembly is hingedly connected to the lower end of the connecting seat. During the folding process, the upper end of the rocker assembly and the lower end of the connecting seat both rotate backward, thereby driving the wheel beam assembly to rotate upward and fold under the seat assembly; at the same time, the connecting seat will drive the backrest assembly and the telescopic drive component to rotate forward together during the rotation process, thereby causing the backrest assembly to rotate to fold above the seat assembly; during the rotation process, the rocker assembly will also drive the connecting rod assembly to move backward, thereby driving the wheel arm assembly to rotate backward through the connecting rod assembly to fold on the wheel beam assembly, thereby enabling the wheelchair to be folded and opened quickly and conveniently. In addition, in the opened state, when the telescopic drive component is extended, it can drive the backrest assembly to rotate to an upright state, at which time the user can maintain a sitting position; when the telescopic drive component is shortened, it can drive the backrest assembly to rotate to a lying state, at which time the user can lie flat and relax. Therefore, the telescopic driving component realizes the backrest lying function, so that the user can lie flat and relax after sitting for a long time, which relieves the user's physical fatigue after sitting for a long time and makes the user more comfortable. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a structural schematic diagram of the front side of the folding wheelchair of the utility model;

[0035] Figure 2 It is a structural schematic diagram of the back side of the folding wheelchair of the utility model;

[0036] Figure 3 It is a schematic structural diagram of the rear driving wheel assembly of the folding wheelchair of the utility model when it is disassembled;

[0037] Figure 4 It is a structural schematic diagram of the folding state of the folding wheelchair of the utility model;

[0038] Figure 5 It is a structural schematic diagram of the folding wheelchair of the utility model in a lying state;

[0039] Figure 6 It is a structural schematic diagram of the bottom of the folding wheelchair of the utility model;

[0040] Figure 7 This is an exploded view of the assembly of the folding wheelchair of the utility model. DETAILED DESCRIPTION

[0041] In order to make the content of the utility model more clearly understood, the utility model is further described in detail below based on specific embodiments and in conjunction with the accompanying drawings.

[0042] like Figures 1 to 7 As shown, a folding wheelchair comprises a seat assembly 1, a backrest assembly 2, a connecting seat 3, a wheel beam assembly 100, a rocker arm assembly 200, a connecting rod assembly 300, a wheel arm assembly 400, a front wheel 4, a rear drive wheel assembly 500 and a telescopic drive component 5;

[0043] The front end of the wheel beam assembly 100 and the upper end of the wheel arm assembly 400 are coaxially hinged to the front end of the seat assembly 1;

[0044] The lower end of the backrest assembly 2 and the upper end of the connecting seat 3 are coaxially hinged on the rear end of the seat assembly 1;

[0045] The upper end of the rocker arm assembly 200 is hinged to the lower end of the connecting seat 3;

[0046] The lower end of the rocker arm assembly 200 is hinged to the rear end of the wheel beam assembly 100;

[0047] The front end of the connecting rod assembly 300 is hinged to the lower end of the wheel arm assembly 400;

[0048] The rear end of the connecting rod assembly 300 is hinged to the middle part of the rocker arm assembly 200;

[0049] The front wheel 4 is connected to the lower end of the wheel arm assembly 400;

[0050] The rear drive wheel assembly 500 is connected to the rear end of the wheel beam assembly 100;

[0051] The lower end of the telescopic driving component 5 is hinged to the connecting seat 3, and the upper end of the telescopic driving component 5 is hinged to the backrest assembly 2. The telescopic driving component 5 is used to drive the backrest assembly 2 to rotate to an upright state or drive the backrest assembly 2 to rotate to a lying state during the telescopic process. Specifically, the upper end of the rocker assembly 200 is hingedly connected to the lower end of the connecting seat 3. During the folding process, the upper end of the rocker assembly 200 and the lower end of the connecting seat 3 rotate backward, thereby driving the wheel beam assembly 100 to rotate upward and fold under the seat assembly 1; at the same time, the connecting seat 3 drives the backrest assembly 2 and the telescopic drive component 5 to rotate forward together during the rotation process, thereby rotating the backrest assembly 2 to fold above the seat assembly 1; the rocker assembly 200 also drives the connecting rod assembly 300 to move backward during the rotation process, thereby driving the wheel arm assembly 400 to rotate backward to fold on the wheel beam assembly 100 through the connecting rod assembly 300, thereby realizing the folding and opening functions of the wheelchair quickly and conveniently. In addition, in the open state, when the telescopic drive component 5 is extended, it can drive the backrest assembly 2 to rotate to the erected state, at which time the user can maintain a sitting position; when the telescopic drive component 5 is shortened, it can drive the backrest assembly 2 to rotate to the lying state, at which time the user can lie flat and relax. Therefore, the telescopic driving component 5 realizes the backrest lying function, so that the user can lie flat and relax after sitting for a long time, which relieves the user's physical fatigue after sitting for a long time and makes the user more comfortable.

[0052] like Figure 1 , 2 As shown in , 3, 5, and 7, the wheel beam assembly 100 may include a left beam body 6, a right beam body 7, and a cross beam 8, the left end of the cross beam 8 is connected to the rear end of the left beam body 6, the right end of the cross beam 8 is connected to the rear end of the right beam body 7, and the rear drive wheel assembly 500 is connected to the cross beam 8;

[0053] The wheel arm assembly 400 may include a left wheel arm 9 and a right wheel arm 10, the upper end of the left wheel arm 9, the front end of the left beam body 6, the upper end of the right wheel arm 10 and the front end of the right beam body 7 are coaxially hinged to the front end of the seat assembly 1, and the lower end of the left wheel arm 9 and the lower end of the right wheel arm 10 are respectively connected to the front wheel 4;

[0054] The rocker arm assembly 200 may include a left rocker arm 11 and a right rocker arm 12, and the connecting rod assembly 300 may include a left connecting rod 13 and a right connecting rod 14;

[0055] The upper end of the left rocker arm 11 and the upper end of the right rocker arm 12 are coaxially hinged on the lower end of the connecting seat 3;

[0056] The lower end of the left rocker arm 11 is hingedly connected to the rear end of the left beam body 6 around a first rotation axis, and the lower end of the right rocker arm 12 is hingedly connected to the rear end of the right beam body 7 around the first rotation axis;

[0057] The rear end of the left connecting rod 13 is hingedly connected to the middle part of the left rocker arm 11 around a second rotation axis, and the rear end of the right connecting rod 14 is hingedly connected to the middle part of the right rocker arm 12 around the second rotation axis;

[0058] The front end of the left connecting rod 13 is hingedly connected to the lower end of the left wheel arm 9 around the third rotating shaft, and the front end of the right connecting rod 14 is hingedly connected to the lower end of the right wheel arm 10 around the third rotating shaft; specifically, during the folding process, the upper end of the left rocker arm 11, the upper end of the right rocker arm 12 and the lower end of the connecting seat 3 all rotate backward, thereby driving the left beam body 6 and the right beam body 7 to rotate upward until they are folded under the seat assembly 1; at the same time, the connecting seat 3 will drive the backrest assembly 2 and the telescopic drive component during the rotation process. 5 rotates forward together, thereby causing the backrest assembly 2 to rotate to be folded above the seat assembly 1; the left rocker arm 11 also drives the left connecting rod 13 to move backward during the rotation process, thereby driving the left wheel arm 9 to rotate backward to be folded on the left beam body 6 through the left connecting rod 13; the right rocker arm 12 also drives the right connecting rod 14 to move backward during the rotation process, thereby driving the right wheel arm 10 to rotate backward to be folded on the right beam body 7 through the right connecting rod 14, thereby enabling the wheelchair to be folded and unfolded quickly and conveniently.

[0059] In this embodiment, the left connecting rod 13 and the right connecting rod 14 , the left rocker arm 11 and the right rocker arm 12 , and the left wheel arm 9 and the right wheel arm 10 may be connected via a cross bar 15 .

[0060] In this embodiment, the rear drive wheel assembly 500 includes a mounting base, a battery 16, two rear wheels 17 and motors corresponding to the rear wheels 17 one by one; wherein the mounting base is connected to the cross beam 8, the battery 16 is connected to the mounting base and used to power the motor, the motor is connected to the mounting base, and the motor is connected to the corresponding rear wheel 17 and used to drive the corresponding rear wheel 17 to rotate.

[0061] In this embodiment, the telescopic driving component 5 may be an electric cylinder. Of course, in some embodiments, the telescopic driving component 5 may also be an electric push rod.

[0062] like Figure 1 , 2 As shown in FIGS. 3 and 7 , the connecting rod assembly 300 is connected with a storage bag 18 so as to store some personal belongings; specifically, the storage bag 18 is connected to the left connecting rod 13 and the right connecting rod 14 in the connecting rod assembly 300 .

[0063] like Figures 5 to 7 As shown, the folding wheelchair may further include a tow chain 19 and a tension spring 20;

[0064] The drag chain 19 and the tension spring 20 are both arranged below the seat assembly 1, the front end of the tension spring 20 is connected to the seat assembly 1, the rear end of the tension spring 20 is connected to the front end of the drag chain 19, and the rear end of the drag chain 19 is connected to the lower end of the backrest assembly 2; specifically, the wire harness can pass through the drag chain 19 from the seat assembly 1 and then penetrate into the backrest assembly 2, and when the backrest assembly 2 rotates between the erected state and the flat state, the drag chain 19 bends with it and can maintain a large fillet, thereby avoiding the risk of bending and breaking of the wire harness; in addition, the displacement caused by the drag chain 19 when the backrest assembly 2 rotates can be compensated and eliminated by the tension spring 20. In this embodiment, the material of the drag chain 19 can be nylon.

[0065] like Figure 2 , 3 As shown in FIGS. 4 and 7 , an indicator light 21 can be connected to the rear end of the connecting seat 3, the indicator light 21 is provided with a first contact, and a second contact is connected to the seat assembly 1, and the first contact cooperates with the second contact to supply power to the indicator light 21; specifically, the specific structure of the seat assembly 1 is the prior art well known to those skilled in the art, and will not be described in detail in this embodiment.

[0066] In this embodiment, the backrest assembly 2 may include an aluminum alloy frame, a plastic outer frame and a backrest mesh;

[0067] The upper end of the connecting seat 3, the rear end of the seat assembly 1 and the lower end of the aluminum alloy frame are coaxially hingedly connected;

[0068] The plastic outer frame is installed on the aluminum alloy frame;

[0069] The backrest mesh is installed on the plastic outer frame.

[0070] like Figure 2 , 3As shown in , 4 and 7, the rear portion of the plastic outer frame is connected to an audio unit 22; specifically, the audio unit 22 enables the user to listen to music while sitting or lying on the wheelchair, which is more convenient and comfortable to use and has more powerful functions; in this embodiment, the wiring harness extends into the backrest assembly 2 to supply power and transmit signals to the audio unit 22 and the telescopic drive component 5, and the wiring harness can also connect components such as the battery 16 and sensors.

[0071] like Figures 1 to 7 As shown, the folding wheelchair may further include a headrest assembly 23 ; wherein, a mounting block 24 is connected to the upper end of the plastic outer frame, and the headrest assembly 23 is connected to the mounting block 24 .

[0072] In summary, the upper end of the rocker assembly 200 is hingedly connected to the lower end of the connecting seat 3. During the folding process, the upper end of the rocker assembly 200 and the lower end of the connecting seat 3 both rotate backward, thereby driving the wheel beam assembly 100 to rotate upward and fold under the seat assembly 1; at the same time, the connecting seat 3 will drive the backrest assembly 2 and the telescopic drive component 5 to rotate forward together during the rotation process, thereby causing the backrest assembly 2 to rotate to fold above the seat assembly 1; the rocker assembly 200 will also drive the connecting rod assembly 300 to move backward during the rotation process, thereby driving the wheel arm assembly 400 to rotate backward to fold on the wheel beam assembly 100 through the connecting rod assembly 300, thereby realizing the folding and opening functions of the wheelchair quickly and conveniently. In addition, in the open state, when the telescopic drive component 5 is extended, it can drive the backrest assembly 2 to rotate to the erected state, at which time the user can maintain a sitting position; when the telescopic drive component 5 is shortened, it can drive the backrest assembly 2 to rotate to the lying state, at which time the user can lie flat and relax. Therefore, the telescopic driving component 5 realizes the backrest lying function, so that the user can lie flat and relax after sitting for a long time, which relieves the user's physical fatigue after sitting for a long time and makes the user more comfortable.

[0073] The specific embodiments described above further illustrate the technical problems, technical solutions and beneficial effects solved by the present invention. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A folding wheelchair, characterized in that: It comprises a seat assembly (1), a backrest assembly (2), a connecting seat (3), a wheel beam assembly (100), a rocker arm assembly (200), a connecting rod assembly (300), a wheel arm assembly (400), a front wheel (4), a rear drive wheel assembly (500) and a telescopic drive component (5); The front end of the wheel beam assembly (100) and the upper end of the wheel arm assembly (400) are coaxially hinged to the front end of the seat assembly (1); The lower end of the backrest assembly (2) and the upper end of the connecting seat (3) are coaxially hinged on the rear end of the seat assembly (1); The upper end of the rocker arm assembly (200) is hinged to the lower end of the connecting seat (3); The lower end of the rocker arm assembly (200) is hinged to the rear end of the wheel beam assembly (100); The front end of the connecting rod assembly (300) is hinged to the lower end of the wheel arm assembly (400); The rear end of the connecting rod assembly (300) is hinged to the middle part of the rocker arm assembly (200); The front wheel (4) is connected to the lower end of the wheel arm assembly (400); The rear drive wheel assembly (500) is connected to the rear end portion of the wheel beam assembly (100); The lower end of the telescopic driving component (5) is hinged to the connecting seat (3), and the upper end of the telescopic driving component (5) is hinged to the backrest assembly (2). The telescopic driving component (5) is used to drive the backrest assembly (2) to rotate to an upright state or to drive the backrest assembly (2) to rotate to a lying state during the telescopic process.

2. The folding wheelchair according to claim 1, characterized in that: The wheel beam assembly (100) comprises a left beam body (6), a right beam body (7) and a cross beam (8), the left end of the cross beam (8) is connected to the rear end of the left beam body (6), the right end of the cross beam (8) is connected to the rear end of the right beam body (7), and the rear drive wheel assembly (500) is connected to the cross beam (8); The wheel arm assembly (400) comprises a left wheel arm (9) and a right wheel arm (10), the upper end of the left wheel arm (9), the front end of the left beam body (6), the upper end of the right wheel arm (10) and the front end of the right beam body (7) are coaxially hinged to the front end of the seat assembly (1), and the lower end of the left wheel arm (9) and the lower end of the right wheel arm (10) are respectively connected to the front wheel (4); The rocker arm assembly (200) comprises a left rocker arm (11) and a right rocker arm (12), and the connecting rod assembly (300) comprises a left connecting rod (13) and a right connecting rod (14); The upper end of the left rocker arm (11) and the upper end of the right rocker arm (12) are coaxially hinged on the lower end of the connecting seat (3); The lower end of the left rocker arm (11) is hingedly connected to the rear end of the left beam body (6) around a first rotation axis, and the lower end of the right rocker arm (12) is hingedly connected to the rear end of the right beam body (7) around the first rotation axis; The rear end of the left connecting rod (13) is hingedly connected to the middle part of the left rocker arm (11) around a second rotating shaft, and the rear end of the right connecting rod (14) is hingedly connected to the middle part of the right rocker arm (12) around the second rotating shaft; The front end of the left connecting rod (13) is hingedly connected to the lower end of the left wheel arm (9) around a third rotating shaft, and the front end of the right connecting rod (14) is hingedly connected to the lower end of the right wheel arm (10) around the third rotating shaft.

3. The folding wheelchair according to claim 1, characterized in that: The telescopic driving component (5) is an electric cylinder or an electric push rod.

4. The folding wheelchair according to claim 1, characterized in that: The connecting rod assembly (300) is connected to a storage bag (18).

5. The folding wheelchair according to claim 1, characterized in that: It also includes a tow chain (19) and a tension spring (20); The drag chain (19) and the tension spring (20) are both arranged below the seat assembly (1); the front end of the tension spring (20) is connected to the seat assembly (1); the rear end of the tension spring (20) is connected to the front end of the drag chain (19); and the rear end of the drag chain (19) is connected to the lower end of the backrest assembly (2).

6. The folding wheelchair according to claim 5, characterized in that: The material of the drag chain (19) is nylon.

7. The folding wheelchair according to claim 1, characterized in that: An indicator light (21) is connected to the rear end of the connection seat (3), a first contact is provided on the indicator light (21), a second contact is connected to the seat assembly (1), and the first contact and the second contact are connected in cooperation to supply power to the indicator light (21).

8. The folding wheelchair according to claim 1, characterized in that: The backrest assembly (2) comprises an aluminum alloy frame, a plastic outer frame and a backrest mesh; The upper end of the connecting seat (3), the rear end of the seat assembly (1) and the lower end of the aluminum alloy frame are coaxially hingedly connected; The plastic outer frame is installed on the aluminum alloy frame; The backrest mesh is installed on the plastic outer frame.

9. The folding wheelchair according to claim 8, characterized in that: The rear part of the plastic outer frame is connected with an audio unit (22).

10. The folding wheelchair according to claim 8, characterized in that: It also includes a headrest assembly (23); wherein the upper end of the plastic outer frame is connected to a mounting block (24), and the headrest assembly (23) is connected to the mounting block (24).

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