Folding wheelchair

Abstract

The utility model discloses a folding wheelchair which is characterized in that the folding wheelchair comprises a backrest tube, the tail end of a seat tube is movably connected with the backrest tube, a folding mechanism is arranged between the seat tube and a main frame inclined tube, and the seat tube drives a front structure to be folded towards the backrest tube by operating the folding mechanism. The folding mode is improved into the mode that the seat pipe drives the front structure to be folded towards the backrest pipe, standing type folding of the wheelchair is achieved through the folding mode that the seat pipe is opened, closed and put down, and the wheelchair is higher in height after being folded and convenient to open and close for use.

Description

Technical Field

[0001] The utility model relates to the field of wheelchair manufacturing, and particularly relates to a folding wheelchair. Background Art

[0002] A folding wheelchair is a wheelchair designed for convenient carrying and storage, and is particularly suitable for users who need to move or travel frequently.

[0003] Existing folding wheelchairs are often set in a form that requires the removal of the headrest or seat to complete folding. This type of folding has the defects of inconvenient folding and storage and a large folding area.

[0004] Or it is a form of folding forward, such as the folding form of Chinese Patent CN116549228A.

[0005] However, this folding method partially improves the problem of a large folding area, but the overall height after folding is relatively low, and it is necessary to bend down to lift, take, and open. Due to the weight of the wheelchair itself, it is not very convenient for long-term use, and most wheelchair users are the elderly, which is likely to increase the burden on the user group.

[0006] The utility model improves the folding method and realizes the standing folding of the wheelchair by forming a folding method through the opening and closing and lowering of the seat tube. The height after folding is higher, and it is also convenient for opening and closing. Summary of the Utility Model

[0007] In order to overcome the above-mentioned defects of the prior art, the purpose of the utility model is to provide a folding wheelchair, which realizes the standing folding of the wheelchair through the folding wheelchair of the utility model. The height after folding is higher, and it is also convenient for opening and closing.

[0008] In order to achieve the purpose of the utility model, the technical solution adopted is:

[0009] A folding wheelchair, comprising:

[0010] A backrest tube, the end of the seat tube is movably connected to the backrest tube,

[0011] A folding mechanism is arranged between the seat tube and the main frame inclined tube, and by operating the folding mechanism, the seat tube drives the front structure to fold towards the backrest tube.

[0012] A folding wheelchair, comprising:

[0013] A backrest tube;

[0014] The backrest tube is an arc-shaped pipe fitting;

[0015] The end of the seat tube is movably connected to the backrest tube;

[0016] A first main frame diagonal tube and a second main frame diagonal tube are respectively connected to the first end and the second end of the arc-shaped pipe fitting;

[0017] A first rear wheel and / or a first anti-tipping wheel structure are fixed to the lower end of the first main frame diagonal tube;

[0018] A second rear wheel and / or a second anti-tipping wheel structure are fixed to the lower end of the second main frame diagonal tube;

[0019] The upper end of the first main frame diagonal tube is connected to the side part of the seat tube and the first front wheel connecting tube through a folding mechanism;

[0020] A first front wheel is arranged at the end of the first front wheel connecting tube;

[0021] The upper end of the second main frame diagonal tube is connected to the other side part of the seat tube shown and the second front wheel connecting tube through another folding mechanism;

[0022] A second front wheel is arranged at the end of the second front wheel connecting tube;

[0023] The folding mechanism includes a movable pull rod;

[0024] A spring and a first limiting member are arranged between the pull rod and the first main frame diagonal tube or the second main frame diagonal tube;

[0025] A second limiting member is arranged between the pull rod and the seat tube;

[0026] The cooperation of the spring, the first limiting member and the second limiting member is used to pull the pull rod to realize the movement between the seat tube and the backrest tube.

[0027] In a preferred embodiment of the present invention, the end of the seat tube is movably connected to the backrest tube by arranging a movable connecting member.

[0028] In a preferred embodiment of the present invention, the first anti-tipping wheel structure includes a first anti-tipping tube and a first anti-tipping wheel arranged at the end of the first anti-tipping tube.

[0029] In a preferred embodiment of the present invention, a first rear connecting tube is arranged between the first anti-tipping tube and the backrest tube.

[0030] In a preferred embodiment of the present invention, the second anti-tipping wheel structure includes a second anti-tipping tube and a second anti-tipping wheel arranged at the end of the second anti-tipping tube.

[0031] In a preferred embodiment of the present invention, a second rear connecting tube is arranged between the second anti-tipping tube and the backrest tube.

[0032] In a preferred embodiment of the present utility model, a pedal structure is provided on the first front wheel connecting pipe.

[0033] In a preferred embodiment of the present utility model, a pedal structure is provided on the second front wheel connecting pipe.

[0034] In a preferred embodiment of the present utility model, the outer diameter of the first rear wheel or the second rear wheel is greater than the outer diameter of the first front wheel or the second front wheel.

[0035] In a preferred embodiment of the present utility model, the folding mechanism includes a movable pull rod;

[0036] A first installation waist hole is provided at the upper end of the main structural plate of the pull rod;

[0037] The second limiting member passes through the first installation waist hole and is installed on the seat tube to achieve limiting.

[0038] In a preferred embodiment of the present utility model, a spring and a first limiting member are provided between the pull rod and the first main frame diagonal tube or the second main frame diagonal tube through a fixing plate;

[0039] A hook-shaped portion is provided at the end of the main structural plate of the pull rod;

[0040] The first limiting member is provided on the fixing plate, and the movement of the hook-shaped portion is limited by contact with the first limiting member;

[0041] The overall movement of the pull rod is restricted by the elastic deformation of the spring to prevent disengagement.

[0042] In a preferred embodiment of the present utility model, armrest structures are provided on both sides of the backrest tube.

[0043] The beneficial effects of the present utility model are as follows:

[0044] By improving the folding method, the present utility model forms a folding method in which the seat tube drives the front structure to fold towards the backrest tube. The wheelchair is folded in a standing manner by opening and lowering the seat tube. After folding, the height is higher and it is also convenient to open and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 It is a schematic diagram of the overall structure of the present utility model.

[0046] Figure 2 It is a schematic diagram of a partial structure of the present utility model Figure 1 。

[0047] Figure 3 It is a schematic diagram of a partial structure of the present utility model Figure 2 。

[0048] Figure 4 This is a partial usage schematic diagram of the present utility model (the arrow in the figure indicates the movement direction).

[0049] Figure 5 This is the overall usage schematic of the present utility model Figure 1 .

[0050] Figure 6 This is the overall usage schematic of the present utility model Figure 2 . Detailed implementation manners

[0051] To make the objectives, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. However, it should be understood that the specific embodiments described herein are only used to explain the present utility model and are not intended to limit the scope of the present utility model. In addition, in the following structures, the descriptions of well-known structures and technologies are omitted to avoid unnecessarily confusing the concepts of the present utility model.

[0052] In the description of the present utility model, it should be noted that the orientation or positional relationships indicated by the terms "upper", "lower", "inner", "outer", "top / bottom end", etc. are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description. Instead of indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, it should not be construed as a limitation of the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0053] As Figures 1-6 shown, a folding wheelchair 1 includes a backrest tube 10, and the end of a seat tube 20 is connected to the backrest tube 10 through a movable connecting member 30.

[0054] A folding mechanism 50 is provided between the seat tube 20 and the main frame diagonal tube 40. By operating the folding mechanism 50, the seat tube 20 drives the front structure to fold towards the direction of the backrest tube 10.

[0055] The present utility model improves the folding method to a form in which the seat tube drives the front structure to fold towards the backrest tube. By forming a folding method through the opening and closing and lowering of the seat tube, the standing folding of the wheelchair is realized. After folding, its height is higher and it is also convenient for opening and closing use.

[0056] And in combination with Figures 1-3 it can be known that the specific implementation structure of the present utility model is as follows:

[0057] The backrest tube 10 is an arc-shaped pipe fitting, and a first main frame diagonal tube 41 and a second main frame diagonal tube (not shown in the figure) are respectively connected to the first end and the second end of the arc-shaped pipe fitting.

[0058] In addition, armrest structures 11 can be provided on both sides of the backrest tube 10 as required.

[0059] A first rear wheel 60 and a first anti-tipping wheel structure 70 are fixed to the lower end of the first main frame diagonal tube 41.

[0060] Correspondingly, a second rear wheel and a second anti-tipping wheel structure (not shown in the figure) are fixed to the lower end of the second main frame diagonal tube. The two are symmetrically arranged structures, which is for the overall balance of the wheelchair.

[0061] The first anti-tipping wheel structure 70 includes a first anti-tipping tube 71 and a first anti-tipping wheel 72 provided at the end of the first anti-tipping tube 71.

[0062] A first rear connecting tube 90 is provided between the first anti-tipping tube 71 and the backrest tube 10. The first rear connecting tube 90 can improve the overall folding stability after folding.

[0063] Correspondingly, the second anti-tipping wheel structure includes a second anti-tipping tube and a second anti-tipping wheel provided at the end of the second anti-tipping tube (not shown in the figure). A second rear connecting tube (not shown in the figure) is provided between the second anti-tipping tube and the backrest tube.

[0064] The upper end of the first main frame diagonal tube 41 is connected to the side of the seat tube 20 and the first front wheel connecting tube 80 through a folding mechanism 50;

[0065] A first front wheel 81 is provided at the end of the first front wheel connecting tube 80; a pedal structure 82 is provided on the first front wheel connecting tube 80.

[0066] Correspondingly, the upper end of the second main frame diagonal tube (not shown in the figure) is connected to the other side of the seat tube (not shown in the figure) and the second front wheel connecting tube (not shown in the figure) through another folding mechanism (not shown in the figure). A pedal structure is provided on the second front wheel connecting tube.

[0067] A second front wheel (not shown in the figure) is provided at the end of the second front wheel connecting tube.

[0068] In order to further improve the stability of the overall structure after folding, the outer diameter of the first rear wheel 60 or the second rear wheel is larger than the outer diameter of the first front wheel 81 or the second front wheel.

[0069] Focusing on combining Figure 2 and 3 It can be seen that the folding mechanism 50 includes a movable pull rod 51. A spring 52 and a first limiting member 53 are provided between the pull rod 51 and the first main frame diagonal tube 41 and another identical folding mechanism (not shown in the figure) and the second main frame diagonal tube (not shown in the figure). A second limiting member 54 is provided between the pull rod 51 and the seat tube 20;

[0070] As specifically shown in the embodiments, a first mounting slot 511 is formed at the upper end of the main structural plate of the pull rod 51; the second limiting member 54 passes through the first mounting slot 511 and is mounted on the seat tube 20 to achieve limiting.

[0071] A spring 52 and a first limiting member 53 are arranged between the pull rod 51 and the first main frame diagonal tube 41 or the second main frame diagonal tube through a fixing plate 55, and a hook-shaped portion 512 is arranged at the end of the main structural plate of the pull rod 51; the first limiting member 53 is arranged on the fixing plate 55, and the movement of the hook-shaped portion 512 is limited by contact with the first limiting member 53. The overall movement of the pull rod 51 is limited by the elastic deformation of the spring 52 to prevent disengagement.

[0072] The components of the folding mechanism 50 can be fixed by fasteners as required. The fasteners are threaded fasteners in the embodiments, but can be other fasteners in actual development.

[0073] Due to the above structure, the working principle of the present utility model is as follows:

[0074] When folding is required, the pull rod 51 is manually lifted upward. At this time, the limit between the hook-shaped portion 512 and the first limiting member 53 is released, so that the seat tube 20 drives the front structure to fold toward the backrest tube 10.

[0075] Since it is a standing folding setting, the center of gravity of the overall wheelchair is relatively high. To prevent the wheelchair from tipping forward, the outer diameter of the first rear wheel 60 or the second rear wheel is larger than the outer diameter of the first front wheel 81 or the second front wheel, so that the center of gravity after overall folding is located on or behind the center line;

[0076] At the same time, the first anti-tipping wheel structure 70 and the second anti-tipping wheel structure are used to strengthen the support at the rear to prevent the wheelchair from tipping backward.

[0077] When opening is required, only the seat tube 20 needs to be manually pressed downward to unfold until the pull rod 51 reaches the limiting positions of the first limiting member 53, the second limiting member 54 and the spring 52.

[0078] The above shows and describes the basic principles, main features and advantages of the utility model.

[0079] Those skilled in the art of this industry should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. A folding wheelchair, characterized in that: include: a backrest tube, the end of the seat tube is movably connected to the backrest tube, A folding mechanism is provided between the seat tube and the main frame oblique tube, and the seat tube drives the front structure to fold toward the backrest tube by operating the folding mechanism; The folding mechanism includes a movable pull rod; A spring and a first limiter are provided between the pull rod and the main frame oblique tube; A second limiting member is provided between the pull rod and the seat tube; The spring cooperates with the first limiting member and the second limiting member to pull the pull rod to achieve movement between the seat tube and the backrest tube.

2. A folding wheelchair as claimed in claim 1, characterized in that: include: a backrest tube; The backrest tube is an arc-shaped tube; The end of the seat tube is movably connected to the backrest tube; A first main frame oblique tube and a second main frame oblique tube are respectively connected to the first end and the second end of the arc-shaped tube; A first rear wheel and / or a first anti-rollover structure is fixed to the lower end of the first main frame oblique tube; A second rear wheel and / or a second anti-rollover structure is fixed to the lower end of the second main frame oblique tube; The upper end of the first main frame oblique tube is connected to the side of the seat tube and the first front wheel connecting tube through a folding mechanism; A first front wheel is disposed at the end of the first front wheel connecting tube; The upper end of the second main frame oblique tube is connected to the other side of the seat tube and the second front wheel connecting tube through another folding mechanism; A second front wheel is disposed at the end of the second front wheel connecting pipe; The folding mechanism includes a movable pull rod; A spring and a first limiter are provided between the pull rod and the first main frame oblique tube or the second main frame oblique tube; A second limiting member is provided between the pull rod and the seat tube; The spring cooperates with the first limiting member and the second limiting member to pull the pull rod to achieve movement between the seat tube and the backrest tube.

3. A folding wheelchair as claimed in claim 2, characterized in that: The movable connection between the end of the seat tube and the backrest tube is achieved by providing a movable connecting piece.

4. A folding wheelchair as claimed in claim 2, characterized in that: The first anti-rollover wheel structure includes a first anti-rollover tube and a first anti-rollover wheel arranged at the end of the first anti-rollover tube; A first rear connecting tube is arranged between the first anti-rollover tube and the backrest tube.

5. A folding wheelchair as claimed in claim 2, characterized in that: The second anti-rollover wheel structure includes a second anti-rollover tube and a second anti-rollover wheel arranged at the end of the second anti-rollover tube; A second rear connecting tube is provided between the second anti-rollover tube and the backrest tube.

6. A folding wheelchair as claimed in claim 2, characterized in that: The first front wheel connecting tube is provided with a pedal structure; The second front wheel connecting pipe is provided with a pedal structure.

7. A folding wheelchair as claimed in claim 2, characterized in that: An outer wheel diameter of the first rear wheel or the second rear wheel is greater than an outer wheel diameter of the first front wheel or the second front wheel.

8. A folding wheelchair as claimed in claim 2, characterized in that: The folding mechanism includes a movable pull rod; A first mounting waist hole is provided at the upper end of the main structure plate of the pull rod; The second limiting member passes through the first mounting waist hole and is installed on the seat tube to achieve limiting.

9. A folding wheelchair as claimed in claim 2, characterized in that: A spring and a first limiter are provided between the pull rod and the first main frame oblique tube or the second main frame oblique tube via a fixing plate; A hook-shaped portion is provided at the end of the main structural plate of the pull rod; The first limiting member is disposed on the fixing plate, and the movement of the hook-shaped portion is limited by the first limiting member; The overall movement of the pull rod is limited by the elastic deformation of the spring to prevent it from disengaging.

10. A folding wheelchair as claimed in claim 2, characterized in that: Armrest structures are arranged on both sides of the backrest tube.

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