Foldable wheelchair

Abstract

The present invention discloses a flip-foldable wheelchair, which comprises a frame, the frame comprises an upper support rod, the two ends of the upper support rod are connected to a chair back; an upper mounting frame installed on both sides of the chair back, the upper mounting frame supports a chair seat; a lower support rod connected to the upper support rod through a flip mechanism, the two ends of the lower support rod are connected to rear chair wheels; a lower mounting frame extending and connected to the lower support rod, the lower mounting frame is installed with front chair wheels and connected to the rear chair wheels through a hinge frame and connected to the upper mounting frame; an upper armrest frame pivotally connected to the chair back; a lower armrest frame pivotally connected to the chair seat and movably supporting the upper armrest frame; a telescopic rod telescopically sleeved in the upper armrest frame, the telescopic rod is installed with a control handle; and a battery box installed on the lower mounting frame. The present invention connects the chair seat, chair wheels and chair back through the frame, and uses a flip mechanism and an automatic locking mechanism to fold and self-lock, thereby avoiding the trouble of the single function of the previous electric wheelchair.

Description

Technical Field

[0001] The present application belongs to the technical field of wheelchairs, and in particular, relates to a flippable and foldable wheelchair. Background Art

[0002] The wheelchairs currently sold on the market are divided into manual wheelchairs and electric wheelchairs. Electric wheelchairs are further divided into fixed or folding wheelchairs. Folding wheelchairs are convenient for storage and are increasingly popular in the market. However, the current folding wheelchairs lack armrests when unfolded and need to be disassembled separately. They are mostly fastened with bolts, which makes installation more troublesome. In addition, there is a lack of automatic locks when unfolded. In order to prevent deformation after folding, the parts are designed to be interference fit, which increases friction and is very troublesome to use. There is a lack of a more applicable and versatile electric wheelchair. Summary of the invention

[0003] In view of this, the technical problem to be solved by the present application is to provide a flip-foldable wheelchair, which connects the seat, wheels and backrest through a frame, and folds and self-locks by utilizing a flip mechanism and an automatic locking mechanism, thus avoiding the trouble of the previous electric wheelchairs with a single function.

[0004] In order to solve the above technical problems, the present invention discloses a flip and foldable wheelchair, which includes a frame, the frame includes an upper support rod, and the two ends of the upper support rod are connected to a chair back; an upper mounting frame installed on both sides of the chair back, the upper mounting frame supports the chair seat; a lower support rod connected to the upper support rod through a flip mechanism, and the two ends of the lower support rod are connected to the rear chair wheels; a lower mounting frame extending and connected to the lower support rod, the lower mounting frame is installed with the front chair wheels and is connected to the rear chair wheels through a hinge frame and connected to the upper mounting frame; an upper armrest frame pivotally connected to the chair back; a lower armrest frame pivotally connected to the chair seat and movably supporting the upper armrest frame; a telescopic rod telescopically sleeved in the upper armrest frame, the telescopic rod is installed with a control handle; and a battery box installed on the lower mounting frame.

[0005] According to one embodiment of the present invention, the above-mentioned flipping mechanism includes an upper pivot arm which is sleeved and fixed on both ends of the upper support rod, one end of the upper pivot arm is pivotally connected to the lower pivot arm sleeved on the lower support rod, and the other end is passed through an adjusting bolt, the adjusting bolt is movably pressed against the branch of the lower pivot arm, the branch is adhered to a rubber pad, the upper end of the adjusting bolt is limited and pressed by a nut, and the lower end is sleeved with a compression spring.

[0006] According to one embodiment of the present invention, an automatic locking mechanism is further provided between the upper support rod and the lower support rod, and the automatic locking mechanism includes a buckling block fixed at the center of the upper support rod and a corresponding buckling seat installed on the lower support rod; wherein the buckling block is pressed against the lower support rod by the arc of the upper end, and has a buckling groove facing the buckling seat; the buckling seat includes a guide column sleeve arranged at intervals on the lower support rod, and the guide column sleeve has relative sliding grooves; pull rods are respectively inserted into the guide column sleeves, and the pull rods are located at the outer ends of the guide column sleeves and connected by pull tabs, and the inner ends are connected by buckling rods corresponding to the buckling grooves; and a spring is sleeved on the pull rod and located in the guide column sleeve; wherein by pulling the pull tab, the pull rod spring is driven to be extended and retracted, so that the buckle rod is buckled into or separated from the buckle groove; when the buckle rod is buckled into the buckle groove, the adjusting bolt presses against the branch of the lower pivot arm.

[0007] According to an embodiment of the present invention, the upper mounting frame has a bent portion bent from the lower side of the seat toward the back of the chair, the bent portion is connected by a cross bar, and the cross bar is pivotally connected to the chair back through a sleeve connecting piece.

[0008] According to one embodiment of the present invention, a pedal is further installed at the front end of the lower installation frame.

[0009] According to one embodiment of the present invention, the middle section of the upper armrest frame has a positioning column extending downward, and the side of the positioning column has a positioning groove; the front end of the lower armrest frame has a support handle that supports the upper armrest frame, the support handle is hollow, and has a guide column groove for inserting the positioning column, and the side of the support handle has an adjusting pin for movably locking the positioning groove.

[0010] According to one embodiment of the present invention, the above-mentioned adjustment pin includes a disc portion exposed on the side of the handle; a paddle portion extending from the upper end of the disc portion; and a pin portion eccentrically arranged on the disc portion and embeddable in the positioning groove.

[0011] According to one embodiment of the present invention, the upper end of the upper armrest frame is glued to a leather pad.

[0012] According to one embodiment of the present invention, the telescopic rod has a plurality of limiting holes, and the upper armrest frame has limiting pins that are snap-fitted into the limiting holes.

[0013] Compared with the prior art, the present application can obtain the following technical effects:

[0014] The seat, wheels and backrest are connected by a frame, and are folded and self-locked by a flip mechanism and an automatic locking mechanism, avoiding the trouble of the single function of previous electric wheelchairs.

[0015] Of course, any product implementing this application does not necessarily need to achieve all of the technical effects described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0017] Figure 1 is a three-dimensional diagram of a flip-foldable wheelchair according to an embodiment of the present application;

[0018] Figure 2 This is a schematic diagram of the installation of the flip mechanism of an embodiment of the present application;

[0019] Figure 3 is a schematic diagram of an automatic locking mechanism of an embodiment of the present application;

[0020] Figure 4 This is a schematic diagram of the installation of the upper handrail frame and the lower handrail frame of the embodiment of the present application;

[0021] Figure 5 yes Figure 4 Schematic diagram of separation.

[0022] Reference numerals

[0023] Skeleton 10, upper support rod 11, upper mounting frame 12, lower support rod 13, lower mounting frame 14, hinge frame 15, bending portion 16, cross bar 17, connecting piece 18, chair back 20, chair seat 30, flip mechanism 40, upper pivot arm 41, lower pivot arm 42, adjusting bolt 43, branch 44, compression spring 45, rear chair wheel 51, front chair wheel 52, upper armrest frame 60, positioning column 61, positioning groove 62, lower armrest frame 70, support handle 71, guide column groove 72, adjusting rotating pin 73, disc portion 74, paddle portion 75, pin column portion 76, telescopic rod 80, control handle 81, battery box 82, pedal 83, limit pin 84, automatic locking mechanism 90, buckle block 91, buckle seat 92, buckle groove 93, guide column sleeve 94, slide groove 95, pull rod 96, pull tab 97, buckle rod 98. DETAILED DESCRIPTION

[0024] The following will describe the implementation methods of the present application in detail with the help of accompanying drawings and examples, so that the implementation process of how the present application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0025] Please refer to Figure 1 , Figure 1The present invention is a three-dimensional diagram of a flip-foldable wheelchair according to an embodiment of the present invention. As shown in the figure, a flip-foldable wheelchair comprises a frame 10, the frame 10 comprises an upper support rod 11, the two ends of the upper support rod 11 are connected to a chair back 20; an upper mounting frame 12 mounted on both sides of the chair back 20, the upper mounting frame 12 supports a chair seat 30; a lower support rod 13 connected to the upper support rod 11 through a flip mechanism 40, the two ends of the lower support rod 13 are connected to rear chair wheels 51; a lower mounting frame 14 extending and connected to the lower support rod 13, the lower mounting frame 14 is installed with a front chair wheel 52 and connected to the rear chair wheel 51 through a hinge frame 15 and connected to the upper mounting frame 12; an upper armrest frame 60 pivotally connected to the chair back 20; a lower armrest frame 70 pivotally connected to the chair seat 30 and movably supporting the upper armrest frame 60; a telescopic rod 80 telescopically sleeved in the upper armrest frame 60, the telescopic rod 80 is installed with a control handle 81; and a battery box 82 mounted on the lower mounting frame 14.

[0026] In one embodiment of the present invention, the skeleton 10 constitutes the overall frame of the wheelchair, and the seat back 20 is connected and fixed by the upper support rod 11, and an upper mounting frame 12 supporting the seat 30 is installed on both sides of the seat back 20, the lower support rod 13 is connected to the rear chair wheel 51, and the lower mounting frame 14 is extended laterally for installation and connection to the front chair wheel 52, and then connected to the rear chair wheel 51 through the hinge frame 15, and finally connected to the upper mounting frame 12 to complete the overall fixation, forming the skeleton 10 and completing stable support.

[0027] In addition, an upper armrest frame 60 is pivotally connected on both sides of the chair back 20, and cooperates with a lower armrest frame 70 pivotally connected to the seat 30 to form an integral armrest, which is convenient for users to use. A telescopic rod 80 is penetrated on the inner side of the upper armrest frame 60, and a control handle 81 is installed at its end. Preferably, the telescopic rod 80 has a plurality of limit holes, and the upper armrest frame 60 has a limit pin 84 that is inserted into the limit hole by a buckle. Through telescopic adjustment, it can adapt to different user experiences and has greater flexibility. In addition, a battery box 82 for storing batteries is also installed on the lower mounting frame 14 to realize electric control.

[0028] Please refer to Figure 2 , Figure 2: is a schematic diagram of the installation of the flip mechanism of the embodiment of the present application. The flip mechanism 40 includes an upper pivot arm 41 sleeved and fixed on both ends of the upper support rod 11, one end of the upper pivot arm 41 is pivotally connected to the lower pivot arm 42 sleeved on the lower support rod 13, and the other end is penetrated by an adjusting bolt 43, the adjusting bolt 43 is movably pressed against the branch 44 of the lower pivot arm 42, the branch 44 is adhered with a rubber pad, the upper end of the adjusting bolt 43 is limited by a nut and pressed against, and the lower end is sleeved with a compression spring 45. In this embodiment, the upper support rod 11 is pivotally connected to the lower pivot arm 42 sleeved on the lower support rod 13 by sleeved upper pivot arm 41, and at the same time, the other end of the relative pivot joint is pressed against by the adjusting bolt 43. Specifically, the adjusting bolt 43 is installed on the upper pivot arm 41, and the lower end is sleeved with a compression spring 45, and the upper end is limited by a nut, which can press against and compress against the lower pivot arm 42, so as to form a buffering and shock absorbing effect when the wheelchair is opened. Preferably, the upper pivot arm 41 is bent and pivoted to the lower pivot arm 42 with a bending angle, so as to form a certain telescopic stroke of the adjusting bolt 43.

[0029] Please refer to Figure 3 , Figure 3 The automatic locking mechanism 90 is also provided between the upper support rod 11 and the lower support rod 13 , and the automatic locking mechanism 90 includes a buckle block 91 fixed to the center of the upper support rod 11 and a buckle seat 92 installed on the lower support rod 13 and corresponding to the buckle seat 92 .

[0030] In one embodiment of the present invention, when the automatic locking mechanism 90 rotates the upper support rod 11 and the lower support rod 13, along with the overall folding rotation, the buckle block 91 and the buckle seat 92 can be separated and folded, and can also be buckled to open the wheelchair, thereby realizing an automatic locking and positioning function.

[0031] Specifically, the buckle block 91 is pressed against the lower support rod 13 by the curvature of the upper end, and has a buckle groove 93 facing the buckle seat 92; the buckle seat 92 includes a guide column sleeve 94 arranged at intervals on the lower support rod 13, and the guide column sleeve 94 has a relative slide groove 95; pull rods 96 are respectively inserted into the guide column sleeve 94, and the pull rod 96 is located at the outer end of the guide column sleeve 94 and connected by a pull tab 97, and the inner end is connected by a buckle rod 98 corresponding to the buckle groove 93; and a spring is sleeved on the pull rod 96 and located in the guide column sleeve 94; wherein by pulling the pull tab 97, the pull rod 96 is driven to extend and retract the spring, so that the buckle rod 98 is buckled into or separated from the buckle groove 93; when the buckle rod 98 is buckled into the buckle groove 93, the adjusting bolt 43 presses against the branch 44 of the lower pivot arm 42.

[0032] The upper mounting frame 12 has a bent portion 16 bent from the lower side of the seat 30 to the rear side of the seat back 20, and the bent portion 16 is connected by a cross bar 17, and the cross bar 17 is pivotally connected to the seat back 20 through a sleeve connecting piece 18. When the seat 30 is flipped, it can be rotated through the connecting piece 18, and when it is opened, it can be supported by the bent portion 16, which is stable and reliable.

[0033] A pedal 83 is also installed at the front end of the lower mounting frame 14 for the convenience of the user.

[0034] Next, please refer to Figure 4 and Figure 5 , Figure 4 This is a schematic diagram of the installation of the upper handrail frame and the lower handrail frame of the embodiment of the present application; Figure 5 yes Figure 4 The upper armrest frame 60 has a positioning column 61 extending downward in the middle section, and a positioning groove 62 is provided on the side of the positioning column 61; the front end of the lower armrest frame 70 has a support handle 71 supporting the upper armrest frame 60, the support handle 71 is hollow, has a guide column groove 72 for inserting the positioning column 61, and the side of the support handle 71 has an adjustment pin 73 for movably locking the positioning groove 62.

[0035] In this embodiment, the middle section of the upper armrest frame 60 has a positioning column 61 extending downward, and the corresponding support handle 71 has a guide column groove 72 for inserting the positioning column 61. At the same time, the interior is hollow, and a recessed positioning groove 62 is provided on the side of the positioning column 61, and an adjustment pin 73 is inserted into the side of the support handle 71, which can flexibly lock the positioning column 61 to achieve fixation and separation, facilitate pulling out, disassembly and folding, and improve convenience of use.

[0036] The adjusting rotating pin 73 includes a disc portion 74 exposed on the side of the support handle 71, a paddle portion 75 extending from the upper end of the disc portion 74, and a pin portion 76 eccentrically arranged on the disc portion 75 and embedded in the positioning groove 62. By rotating the paddle portion 75, the disc portion 74 drives the pin portion 76 to rotate eccentrically, buckling or separating the positioning groove 62, locking or opening the pin portion 76, and realizing the separation and folding of the upper armrest frame 60 and the lower armrest frame 70, and the portability is greatly improved.

[0037] It is worth mentioning that the upper end of the upper armrest frame 70 is glued with a leather pad, which is comfortable to use. In addition, the upper end of the support handle 71 has an arc, and the arc surface cooperates with the upper armrest frame 60, with a smooth transition and good stability.

[0038] The above description shows and describes several preferred embodiments of the present application, but as mentioned above, it should be understood that the present application is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the application concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art do not deviate from the spirit and scope of the present application, and should be within the scope of protection of the claims attached to the present application.

Claims

1. A flip-foldable wheelchair, characterized in that: include: A frame, the frame comprising an upper support rod, both ends of which are connected to a chair back; An upper mounting frame mounted on both sides of the chair back, the upper mounting frame supporting the chair seat; A lower support rod connected to the upper support rod by a flip mechanism, and the two ends of the lower support rod are connected to the rear chair wheels; a lower mounting frame extending and connected to the lower support rod, the lower mounting frame is installed with the front chair wheels and connected to the rear chair wheels and the upper mounting frame through a hinge frame; an upper armrest frame pivotally connected to the chair back; A lower armrest frame pivotally connected to the seat and movably supporting the upper armrest frame; A telescopic rod telescopically sleeved in the upper handrail frame, and a control handle is installed on the telescopic rod; as well as A battery box mounted on the lower mounting frame; The flip mechanism comprises an upper pivot arm sleeved and fixed on both ends of the upper support rod, one end of the upper pivot arm is pivotally sleeved on the lower pivot arm of the lower support rod, and the other end is penetrated by an adjusting bolt, the adjusting bolt is movably pressed against the branch of the lower pivot arm, the branch is adhered to a rubber pad, the upper end of the adjusting bolt is limited and pressed by a nut, and the lower end is sleeved with a compression spring; The locking mechanism can be adjusted by the user to allow the locking cam to move forward and backward, so that the locking cam can be adjusted by the user to move the locking cam forward and backward, so that the locking cam can move forward and backward, thereby preventing the locking cam from moving upward and backward. The upper mounting frame has a bending portion bent from the lower side of the seat to the rear side of the seat back, the bending portion is connected by a cross bar, and the cross bar is pivotally connected to the seat back through a sleeve connecting piece.

2. The flip-foldable wheelchair according to claim 1, characterized in that: A pedal is also installed at the front end of the lower installation frame.

3. The flip-foldable wheelchair according to claim 1, characterized in that: The middle section of the upper armrest frame has a positioning column extending downward, and the side of the positioning column has a positioning groove; the front end of the lower armrest frame has a support handle that supports the upper armrest frame, the support handle is hollow and has a guide column groove for inserting the positioning column, and the side of the support handle has an adjustment pin for movably locking the positioning groove.

4. The flip-foldable wheelchair according to claim 3, characterized in that: The adjusting rotating pin comprises a disc portion exposed on the side of the support handle; a paddle portion extending from the upper end of the disc portion; and a pin portion eccentrically arranged on the disc portion and embeddable in the positioning groove.

5. The flip-foldable wheelchair according to claim 3, characterized in that: The upper end of the upper armrest frame is glued to a leather pad.

6. The flip-foldable wheelchair according to claim 1, characterized in that: The telescopic rod has a plurality of limiting holes, and the upper armrest frame has limiting pins which are snap-fitted and inserted into the limiting holes.

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