Handle folding structure of wheelchair
By setting an oblique rotation axis and locking device on the wheelchair handle bar, the flexible folding of the handle bar is solved, and the problem of large volume after folding of the handle bar in the prior art is improved, and the folding effect of the wheelchair is facilitated for portability and transportation.
Patent Information
- Application Number
- CN202420784519.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-15
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2034-04-15
AI Technical Summary
When the existing wheelchair handle bar is folded, the angle between the vertical section and the backrest rod is larger, resulting in a larger volume after folding and poor folding effect.
By setting a rotation axis on the handle bar, the inner end of the handle bar is tilted to the front side of the wheelchair, the transverse section does not directly abut the backrest rod, and a locking device is installed on the vertical section and the backrest rod, and the handle bar is realized by using a movable column and a wrench. The stretch and fold ensure a smaller angle and smaller volume after folding.
It effectively reduces the space volume of the handlebar in the folding state, improves the overall folding effect of the wheelchair, and is easy to carry and transport.
Smart Images
Figure CN222195312U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of wheelchair equipment design, in particular to a handle folding structure of a wheelchair. Background Art
[0002] Wheelchairs are a common means of transportation for disabled people or elderly and infirm people, but wheelchairs are large and heavy. If these people need to travel long distances, carrying and transporting the wheelchairs becomes a primary problem.
[0003] Folding wheelchairs are now available on the market to improve the convenience of wheelchair transportation. The wheelchair usually includes a backrest rod and a bent handle rod. The handle rod includes a transverse section and a vertical section. The backrest rod and the handle rod in the foldable wheelchair are foldable. However, after the handle rod is folded backward relative to the backrest rod, the end of the transverse section will abut against the backrest rod, resulting in a large angle between the vertical section and the backrest rod when the handle rod is folded to the limit. The space occupied by the handle rod after folding is large, and the folding effect is not good. Utility Model Content
[0004] In order to solve the above problems, the utility model proposes a handle folding structure for a wheelchair, which solves the problem that the handle bar folding effect is not good resulting in a large overall volume of the wheelchair after the entire wheelchair is folded.
[0005] The technical solution adopted by the utility model is: a handle folding structure of a wheelchair, comprising a backrest rod and a handle rod, the handle rod is provided with a handle portion, the handle rod comprises a transverse section and a vertical section connected to each other, the transverse section is bent and extended rearward relative to the vertical section, the end of the vertical section is rotatably connected to the backrest rod and forms a rotation axis, the backrest rod and the vertical section are jointly provided with a locking device, the end of the rotation axis close to the inner side of the wheelchair is obliquely close to the front side of the wheelchair; the handle rod can be switched between an extended state and a folded state relative to the backrest rod, and when the handle rod is in the folded state, the transverse section is located on the outer side of the backrest rod.
[0006] Through the above technical solution, since the inner end of the rotation axis is inclined toward the front side of the wheelchair, the end of the horizontal section of the handlebar does not directly abut against the backrest rod during the folding process, and the vertical section can be further folded to make the angle between the backrest rod and the vertical section smaller, so that the space occupied by the handlebar part is smaller after the wheelchair is folded as a whole, and the folding effect is better.
[0007] Furthermore, the backrest rod is in a straight segment shape as a whole, and a central axis is formed in the axial direction of the backrest rod, and the central axis is perpendicular to the rotation axis.
[0008] Through the above technical solution, the backrest rod and the vertical section are always in the same spatial plane during the relative rotation process, so that when the backrest rod is in the folded state, the angle between the backrest rod and the vertical section is smaller, further reducing the space volume occupied by the handlebar in the folded state, so that the folding effect is better.
[0009] Furthermore, the inclination angle of the rotation axis toward the front at the inner end of the wheelchair is between 12 degrees and 20 degrees.
[0010] Through the above technical solution, the inclination angle of the rotation axis is within a reasonable range, which ensures that the end of the transverse section will not directly abut the backrest rod during the folding of the handle rod, and also ensures that the handle rod in the folded state will not tilt outward excessively.
[0011] Furthermore, the vertical section includes a first connecting seat, the backrest rod includes a second connecting seat, and the first connecting seat and the second connecting seat are rotatably connected; the locking device includes an installation channel, a movable column, an adjustable wrench and an elastic member, the installation channel is arranged on the first connecting seat, the movable column is installed in the installation channel, a positioning surface is arranged on the movable column, a positioning plate is arranged in the installation channel, the elastic member abuts between the positioning surface and the positioning plate, the movable column is provided with a limiting plate extending to the side, the adjustable wrench is provided with an avoidance hole for the movable column to pass through, the adjustable wrench is located between the first connecting seat and the limiting plate, and the side wall of the second connecting seat is connected with a clamping hole for the movable column to pass through.
[0012] Through the above technical solution, the user turns the movable wrench to make the end of the movable column withdraw from the snap-in hole, and then rotates the handle bar backward and downward to fold the handle bar. The user only needs to rotate the handle bar upward and forward to extend the handle bar until the end of the movable column is snapped into the snap-in hole, thereby realizing the switching of the extended state of the handle bar. The user can adjust the handle bar to the extended state or the folded state through simple operation, which is very practical and convenient.
[0013] Furthermore, the movable column includes a screw and a nut, the screw and the nut are threadedly connected to each other, the positioning surface is arranged on the screw, and the limiting plate is arranged on the nut.
[0014] Through the above technical solution, the structure of the movable column is simple, and the installation can be completed by inserting screws into the installation channel and the avoidance hole and connecting with nuts. The movable column is easy to install and easy to assemble and produce.
[0015] Furthermore, a clamping groove is provided on the side of the movable wrench facing away from the clamping hole, and two abutting surfaces facing away from each other are provided on the side of the limiting plate. The abutting surfaces are tightly attached to two opposite inner walls in the clamping groove, and the nut is fixed circumferentially.
[0016] Through the above technical solution, relative rotation between the movable wrench and the movable column is avoided during use, thereby preventing the screw and nut from excessively rotating or even disengaging due to vibration generated during use, thereby avoiding inconvenience in use. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.
[0018] Figure 1 It is a schematic diagram of the overall structure in the extended state;
[0019] Figure 2 This is one of the cross-sectional views in the extended state;
[0020] Figure 3 It is a schematic diagram of part of the structure in the extended state;
[0021] Figure 4 This is the second cross-sectional view in the extended state;
[0022] Figure 5 It is an exploded view of the utility model;
[0023] Figure 6 It is a schematic diagram of the overall structure in the folded state;
[0024] Figure 7 It is a schematic diagram of part of the structure in a folded state;
[0025] The utility model number information is as follows:
[0026] 1. Backrest rod; 2. Handle rod; 3. Handle portion; 4. Installation channel; 5. Active column; 6. Active wrench; 7. Elastic member; 8. Positioning surface; 9. Positioning plate; 10. Limiting plate; 11. Avoidance hole; 12. Snap-in hole; 13. Snap-in groove; 14. Abutment surface; 21. Horizontal section; 22. Vertical section; 221. First connecting seat; 101. Second connecting seat; 51. Screw; 52. Nut; 100. Center axis; 200. Rotation axis;
[0027] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION
[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0029] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.
[0030] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.
[0031] refer to Figure 1 , 2 , 6, 7, a handle folding structure of a wheelchair, comprising a backrest rod 1 and a handle rod 2, the handle rod 2 being provided with a handle portion 3, the handle rod 2 comprising a transverse section 21 and a vertical section 22 connected to each other, the transverse section 21 being bent and extended rearward relative to the vertical section 22, the end of the vertical section 22 being rotatably connected to the backrest rod 1 and forming a rotation axis 200, the backrest rod 1 and the vertical section 22 being jointly provided with a locking device, the end of the rotation axis 200 close to the inner side of the wheelchair being obliquely close to the front side of the wheelchair; the handle rod 2 can switch between an extended state and a folded state relative to the backrest rod 1, when the handle rod 2 is in the folded state, the transverse section 21 is located on the outer side of the backrest rod 1.
[0032] Since one inner end of the rotation axis 200 is inclined toward the front side of the wheelchair, the end of the transverse section 21 of the handlebar 2 does not directly abut against the backrest rod 1 during the folding process, and the vertical section 22 can be further folded to make the angle between the backrest rod 1 and the vertical section 22 smaller, so that the space occupied by the handlebar 2 is smaller after the wheelchair is folded as a whole, and the folding effect is better.
[0033] refer to Figure 3 The backrest rod 1 is in a straight section shape as a whole, and a central axis 100 is formed in the axial direction of the backrest rod 1. The central axis 100 and the rotation axis 200 are perpendicular to each other.
[0034] The backrest rod 1 and the vertical section 22 are always in the same spatial plane during the relative rotation, so that when the backrest rod 1 is in the folded state, the angle between the backrest rod 1 and the vertical section 22 is smaller, further reducing the space volume occupied by the handlebar 2 in the folded state, making the folding effect better.
[0035] When the user operates the handle bar 2, the handle bar 2 rotates around the rotation axis 200; the rotation axis 200 and the center axis 100 in this article are used to assist in explaining the specific orientation of the rotation connection between the backrest rod 1 and the handle bar 2 in three-dimensional space, and the rotation axis 200 and the center axis 100 are only for reference and do not actually exist.
[0036] Figure 6 This is only a reference diagram for the overall state in which the backrest rod 1 and the handle rod 2 are in a folded state, and does not mean that other parts of the wheelchair cannot be folded.
[0037] refer to Figure 2 The inclination angle of the rotation axis 200 toward the front near the inner end of the wheelchair is between 12 degrees and 20 degrees.
[0038] The inclination angle of the rotation axis 200 is within a reasonable range, which ensures that the end of the transverse section 21 does not directly abut the backrest rod 1 during the folding of the handlebar 2 and that the handlebar 2 in the folded state does not tilt outward excessively.
[0039] Preferably, the inclination angle of the rotation axis 200 toward the front near the inner side of the wheelchair is 16 degrees.
[0040] refer to Figure 3 , 4 , 5, 6, 7, the vertical section 22 includes a first connecting seat 221, the backrest rod 1 includes a second connecting seat 101, the first connecting seat 221 and the second connecting seat 101 are rotatably connected; the locking device includes an installation channel 4, a movable column 5, an adjustable wrench 6 and an elastic member 7, the installation channel 4 is arranged on the first connecting seat 221, the movable column 5 is installed in the installation channel 4, a positioning surface 8 is arranged on the movable column 5, a positioning plate 9 is arranged in the installation channel 4, the elastic member 7 abuts between the positioning surface 8 and the positioning plate 9, the movable column 5 is provided with a limiting plate 10 extending to the side, the adjustable wrench 6 is provided with an avoidance hole 11 for the movable column 5 to pass through, the movable wrench 6 is located between the first connecting seat 221 and the limiting plate 10, and the side wall of the second connecting seat 101 is connected with a clamping hole 12 for the movable column 5 to penetrate.
[0041] The user turns the movable wrench 6 to make the end of the movable column 5 withdraw from the snap-in hole 12, and then rotates the handle bar 2 backward and downward to fold the handle bar 2. The user only needs to rotate the handle bar 2 upward and forward to extend the handle bar 2 until the end of the movable column 5 is snapped into the snap-in hole 12, thereby realizing the switching of the extended state of the handle bar 2; the user can adjust the handle bar 2 to the extended state or the folded state through simple operation, which is very practical and convenient.
[0042] The elastic member 7 is a spring sleeved on the movable column 5 .
[0043] refer to Figure 4 , 5 The movable column 5 includes a screw 51 and a nut 52 , the screw 51 and the nut 52 are threadedly connected to each other, the positioning surface 8 is arranged on the screw 51 , and the limiting plate 10 is arranged on the nut 52 .
[0044] The structure of the movable column 5 is simple, and the installation can be completed by inserting the screw 51 into the installation channel 4 and the avoidance hole 11 and connecting with the nut 52. The movable column 5 is easy to install and easy to assemble and produce.
[0045] refer to Figure 3 , 5 A clamping groove 13 is provided on the side of the movable wrench 6 facing away from the clamping hole 12, and two abutting surfaces 14 facing away from each other are provided on the side of the limiting plate 10. The abutting surfaces 14 are tightly attached to the two opposite inner walls in the clamping groove 13, and the nut 52 is fixed circumferentially.
[0046] During use, relative rotation between the movable wrench 6 and the movable column 5 is avoided, thereby preventing the screw 51 and the nut 52 from excessively rotating or even coming apart due to vibrations generated during use, thereby avoiding inconvenience in use.
[0047] The above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the utility model concept, or directly / indirectly used in other related technical fields are included in the patent protection scope of the utility model.
Claims
1. A handle folding structure for a wheelchair, comprising a backrest rod (1) and a handle rod (2), wherein the handle rod (2) is provided with a handle portion (3), wherein the handle rod (2) comprises a transverse section (21) and a vertical section (22) connected to each other, wherein the transverse section (21) is bent and extended backward relative to the vertical section (22), wherein the end of the vertical section (22) is rotatably connected to the backrest rod (1) and forms a rotation axis (200), wherein the backrest rod (1) and the vertical section (22) are provided with a locking device, wherein: The end of the rotation axis (200) close to the inner side of the wheelchair is obliquely close to the front side of the wheelchair; the handle bar (2) can be switched between an extended state and a folded state relative to the backrest bar (1); when the handle bar (2) is in the folded state, the transverse section (21) is located on the outer side of the backrest bar (1).
2. The wheelchair handle folding structure according to claim 1, characterized in that: The backrest rod (1) is in the shape of a straight section as a whole, and a central axis (100) is formed in the axial direction of the backrest rod (1), and the central axis (100) and the rotation axis (200) are perpendicular to each other.
3. The wheelchair handle folding structure according to claim 2, characterized in that: The inclination angle of the rotation axis (200) toward the front, close to the inner end of the wheelchair, is between 12 degrees and 20 degrees.
4. A wheelchair handle folding structure according to claim 1, 2 or 3, characterized in that: The vertical section (22) includes a first connecting seat (221), the backrest rod (1) includes a second connecting seat (101), and the first connecting seat (221) and the second connecting seat (101) are rotatably connected; the locking device includes a mounting channel (4), a movable column (5), an adjustable wrench (6) and an elastic member (7), the mounting channel (4) is arranged on the first connecting seat (221), the movable column (5) is installed in the mounting channel (4), a positioning surface (8) is arranged on the movable column (5), and the mounting channel (4) is provided with a positioning surface (8). A positioning plate (9) is arranged in the installation channel (4), the elastic member (7) is abutted between the positioning surface (8) and the positioning plate (9), the movable column (5) is provided with a limiting plate (10) extending to the side, the movable wrench (6) is provided with an avoidance hole (11) for the movable column (5) to pass through, the movable wrench (6) is located between the first connecting seat (221) and the limiting plate (10), and the side wall of the second connecting seat (101) is connected with a clamping hole (12) for the movable column (5) to pass through.
5. The wheelchair handle folding structure according to claim 4, characterized in that: The movable column (5) comprises a screw (51) and a nut (52), wherein the screw (51) and the nut (52) are threadedly connected to each other, the positioning surface (8) is arranged on the screw (51), and the limiting plate (10) is arranged on the nut (52).
6. The wheelchair handle folding structure according to claim 5, characterized in that: A clamping groove (13) is provided on the side of the movable wrench (6) facing away from the clamping hole (12), and two abutment surfaces (14) facing away from each other are provided on the side of the limiting plate (10). The abutment surfaces (14) are tightly attached to two opposite inner walls of the clamping groove (13), and the nut (52) is fixed circumferentially.