TW202002930A - Guiding and anti-backlash structure for connecting a wheelchair and a control stem of the wheelchair - Google Patents

Abstract

A guiding and anti-backlash structure is providing for connecting a wheelchair and a control stem of the wheelchair. The guiding and anti-backlash structure includes a set of mounting frame disposed on a front portion of the wheelchair and a concave portion defined in the set of mounting frame. A rod is mounted onto the control stem. The rod is selectively and detachably engaged to the concave portion such that the control stem is pivotal relative to the mounting frame. The rod has two opposite ends each having an anti-backlash element mounted thereon for preventing the control stem from being swung relative to the mounting frame and guiding the rod to be quickly mounted into the concave portion.

Description

Guided anti-backlash structure for combining wheelchair and its control rod

The present invention relates to a wheelchair; in particular, it discloses an innovative structure type that detaches and assembles a joystick in a wheelchair conveniently and quickly by guiding an anti-backlash structure.

Press, the general wheelchair can be used by disabled users, but because the general wheelchair is a manual wheelchair, it means that the user must push the wheel body by himself, or by the push of others to achieve the purpose of moving forward, not only It is troublesome and laborious to use, and it is also very laborious for users.

Based on the above problems, the industry has subsequently developed some auxiliary power structures that can be added to existing manual wheelchairs to make the manual wheelchairs a new type of self-propelled structure. In response, manual wheelchairs are added Equipped with an auxiliary power structure, when the disabled user uses it, the wheelchair can be advanced by driving the motor of the auxiliary power structure, which not only saves the trouble of pushing the wheelchair by hand, but also saves labor and convenience. In addition, use You can also use the handle to control the direction of the wheel body, the overall operation method is simple and convenient.

However, looking at the current wheelchairs with auxiliary power structure, most of the auxiliary power structure has a handle bar and a motor, so that the handle bar is set on the front side of the manual wheelchair and is electrically driven by the motor, so that it can be transformed into The self-propelled control structure allows the user to control the steering of the wheelchair by controlling the handlebar.

However, the conventional manual wheelchair and handle bar are still not perfect for the design of the assembly structure, and there are still many problems with the overall assembly of the assembly, which is inconvenient and time-consuming. Furthermore, in order to quickly and easily assemble the handle bar in On the wheelchair, a predetermined gap must be left between the corresponding assembly structure of the two. After assembly, due to the predetermined gap, the handle bar and the wheelchair are not tightly combined, which is easy to cause instability, shaking, and then It may affect the actual operation of the handlebar.

In addition, when setting up, the joystick needs to be away from the manual wheelchair by a predetermined distance, and then move the joystick in the direction of the front of the manual wheelchair, and combine together, but this assembly method requires the user to extend the arm to operate, and at the same time Lifting the operating lever with considerable weight, according to this, in addition to causing the user to assemble easily and simply, and directly facing the problem that the manual wheelchair cannot be easily and accurately aligned with the handle bar.

Therefore, there is still considerable room for development and improvement, and this is where this creation will further explore innovation.

The main object of the present invention is to provide a guide anti-backlash structure for combining a wheelchair with a joystick.

Based on the foregoing purpose, the present invention provides a guide anti-backlash structure that combines a wheelchair and its joystick. The control rod is assembled on the wheelchair using the guide anti-backlash structure. The guide anti-backlash structure includes: an assembly positioning frame, which is provided with On the front side of the wheelchair; a limiting recess, which is in the shape of a tiger's cross section, is provided at the front end of the assembly positioning frame, and the limiting recess has a concave arc segment; a catching rod corresponds to the limiting recess and is lateral It is arranged on the control rod, the clamping rod is selectively pivoted in the limiting recess, and constitutes that the control rod is rotatable and swingable relative to the assembly positioning frame, and has an assembly position and a locking position; Moreover, at least a part of the peripheral edge of the cross section of the clamping rod cooperates with the limiting recess to have a circular arc segment, and the two tangents formed by the two ends of the circular arc segment to the central point of the clamping rod are along the circle The clamping angle of the arc segment is greater than the angle between the two tangents formed by the two end points of the concave arc segment and the center point of the limiting concave portion along the concave arc segment; and a pair of anti-backlash positioning members, which are respectively provided on the card The two ends of the connecting rod, and each of the anti-backlash positioning members includes: a clamping part extending from the radial direction of the clamping rod, when the clamping rod is pivotally assembled in the limiting recess, the clamping latch The part is pressed against the position of the assembly positioning frame close to the limiting concave portion, thereby avoiding the left and right shaking of the joystick relative to the assembly positioning frame; a guide part extends outward from the other end of the clamping part and presents A tapered structure to form a guiding slope for guiding the clamping rod to be correspondingly set into the limiting recess quickly; and a turning part connecting the guiding part and the clamping part to make the guiding The lead portion and the grip portion extend in different directions.

The main effects and advantages of the present invention are the use of anti-backlash positioning members to guide and limit the pivoting of the clamping rod to the limiting recess, which avoids the difficulty of accurate alignment between the conventional manual wheelchair and the handle bar and the assembly The problem of inconvenience and time-consuming; and can effectively eliminate the gap between the joystick and the assembly positioning frame, so that the joystick is closely connected to the wheelchair, and is particularly practical and progressive.

Please refer to Figures 1 to 6 which are preferred embodiments of the present invention for guiding the anti-backlash structure of a wheelchair and its joystick, but these embodiments are for illustrative purposes only and are not subject to this in the patent application Structural limitation; the guide anti-backlash structure for combining the wheelchair and its control rod, the control rod 10 is assembled on the wheelchair 30 using the guide anti-backlash structure 20, the guide anti-backlash structure 20 includes: an assembly positioning A frame 21 is provided on the front side of the wheelchair 30; a limiting recess 22 is provided in the shape of a tiger's cross section at the front end of the assembly positioning frame 21, and the limiting recess 22 has a concave arc section 221; a clamping rod 23, corresponding to the limiting concave portion 22, is laterally disposed on the control rod 10, the clamping rod 23 is selectively pivoted in the limiting concave portion 22, and constitutes the control rod 10 relative to the assembly positioning frame 21 It has a rotatable pendulum dynamic shape, and has an assembly position and a locking position; and a pair of anti-backlash positioning members 24, which are respectively provided at both ends of the clamping rod 23, and each of the anti-backlash positioning members 24 includes: a clip The catch portion 25 extends from the radial direction of the catching lever 23, and when the catching lever 23 is pivotally assembled in the limiting recess 22, the catching portion 25 is pressed against the assembly positioning frame 21 The position of the limiting concave portion 22, thereby avoiding the joystick 10 swinging left and right relative to the assembly positioning frame 21; a guide portion 26 extends outward from the other end of the clamping portion 25 and is tapered to form A guiding slope 261 is used to guide the clamping rod 23 to be quickly and correspondingly set into the limiting concave portion 22; and a turning portion 27, connecting the guiding portion 26 and the clamping portion 25 to enable the guiding The lead portion 26 and the grip portion 25 extend in different directions (as shown in FIG. 4). Each of the anti-backlash positioning members 24 is a compressible material.

In this example, each of the anti-backlash positioning members 24 has a circular structure for guiding the clamping rod 23 to accurately align and pivotally function in the limiting recess 22. As shown in FIGS. 7 and 8, in other embodiments, at least a part of the periphery of each anti-backlash positioning member 24 cooperates with the limiting concave portion 22 to have a convex arc segment 241, and the convex arc segment 241 The angle formed by the two tangents 243 formed by the two end points 242 and the center point of the anti-backlash positioning member 24 along the convex arc segment 241 is greater than the two end points 222 of the concave arc segment 221 to the center point of the limiting recess 22 The angle between the two tangent lines 223 is along the concave arc section 221, and each of the anti-backlash positioning members 24 is also used to guide the clamping rod 23 to accurately align and pivotally function in the limiting concave portion 22. Therefore, each of the anti-backlash positioning members 24 has a fan structure.

In addition, each of the anti-backlash positioning members 24 is further provided with an indicator portion (not shown) for the user to determine the direction and position of the corresponding pivot group of the clamping lever 23 in the limiting concave portion 22.

With the above-mentioned structural composition design, the use and operation of the present invention are explained as follows: As shown in Figures 2 and 5, when assembled, the joystick 10 needs to be away from the wheelchair 30 by a predetermined distance before turning the joystick 10 toward The wheelchair 30 moves in the front direction. Next, the guiding slopes 261 (as shown in FIG. 4) of each anti-backlash positioning member 24 first contact the assembly positioning frame 21 to guide the snap rod 23 to be quickly set correspondingly to the limiting concave portion Within 22. Therefore, in the present invention, the anti-backlash positioning member 24 is used to guide and limit the clamping rod 23 to be pivotally assembled in the limiting recess 22, which avoids the difficulty of accurate alignment between the conventional manual wheelchair and the handle bar and the inconvenience of assembly 3. Time-consuming issues.

Finally, as shown in FIG. 6, when the clamping rod 23 is pivotally assembled in the limiting recess 22, since the distance between the two clamping portions 25 (as shown in FIG. 4) is equal to the assembly The distance between the two ends of the positioning frame 21 makes each clamping portion 25 tightly abut on the position of the assembly positioning frame 21 adjacent to the limiting recess 22, thereby avoiding the joystick 10 swinging left and right relative to the assembly positioning frame 21 To effectively eliminate the gap between the control rod 10 and the assembly positioning frame 21, so that the control rod 10 is tightly connected to the wheelchair 30.

As shown in FIG. 9, in other embodiments, at least a part of the peripheral edge of the cross section of the snap rod 23 cooperates with the limiting recess 22 to have a circular arc segment 231, and both ends of the circular arc segment 231 The angle formed by the tangent line 233 from the point 232 to the center point of the clamping rod 23 along the circular arc segment 231 is greater than the two tangent lines 223 formed by the two end points 222 of the concave arc segment 221 and the center point of the limiting recess 22 The clamping angle along the concave arc section 221 allows the clamping rod 23 to be correspondingly assembled in the limiting concave portion 22.

10‧‧‧ Joystick 20‧‧‧Guiding anti-backlash structure 21‧‧‧Assembly positioning frame 22 ‧‧‧ Limit recess 221‧‧‧Concave arc 23 ‧‧‧ card catch 231‧‧‧Circular segment 24‧‧‧Anti-backlash positioning member 241‧‧‧Convex arc 25. ‧‧‧ grip 26‧‧‧Guide Department 261‧‧‧Guide slope 27‧‧‧Transition Department 30‧‧‧ Wheelchair 222, 232, 242‧‧‧ endpoint 223, 233, 243 ‧‧‧ Tangent

Figure 1 is a schematic diagram of a preferred embodiment of the present invention. Figure 2 is an exploded view of Figure 1. Figure 3 is an exploded view of the control anti-backlash structure of the present invention and the corresponding control lever of the clamping rod. FIG. 4 is a cross-sectional view of the guide anti-backlash structure and the clamping rod of the present invention. Figure 5 is a side view of Figure 2. Figure 6 is based on the action picture of Figure 5. FIG. 7 is a schematic diagram of an assembly process in another embodiment of the present invention. Figure 8 is a side view of Figure 7 after assembly. Fig. 9 is a schematic diagram of another embodiment of the present invention.

10‧‧‧ joystick

20‧‧‧Guide anti-backlash structure

21‧‧‧Assembly positioning frame

22‧‧‧Restricted recess

23‧‧‧Clamping rod

24‧‧‧Anti-backlash positioning member

30‧‧‧ Wheelchair

Claims (6)

A guide anti-backlash structure for combining a wheelchair and its control rod, the control rod is assembled on a wheelchair by using the guide anti-backlash structure, the guide anti-backlash structure includes: an assembly positioning frame, which is arranged on the wheelchair Front side; a limit recess, which is in the form of a tiger's cross section and is provided at the front end of the assembly positioning frame, and the limit recess has a concave arc section; a catching rod is corresponding to the limit recess and is laterally arranged on the On the control rod, the clamping rod is selectively pivoted in the limiting recess, and constitutes that the control rod is rotatable and swingable relative to the assembly positioning frame, and has an assembly position and a locking position; At least a part of the peripheral edge of the cross section of the snap rod cooperates with the limiting concave portion to have a circular arc segment, and a tangent formed by the two ends of the circular arc segment to the central point of the snap rod is along the circular arc segment The clamping angle is greater than the angle between the two tangents formed by the two end points of the concave arc section and the center point of the limiting concave section along the concave arc section; and a pair of anti-backlash positioning members, which are respectively provided on the clamping rod At both ends, each of the anti-backlash positioning members includes: a clamping portion extending from a radial direction of the clamping lever, and when the clamping lever is pivotally assembled in the limiting recess, the clamping portion is pressed tightly Abutting on the position of the assembly positioning frame near the limiting concave portion, thereby avoiding the joystick swinging left and right relative to the assembly positioning frame; a guide portion extending outward from the other end of the clamping portion and presenting a tapered structure To form a guiding slope for guiding the clamping rod to be quickly set into the limiting concave portion; and a turning portion connecting the guiding portion and the clamping portion so that the guiding portion and The grip portion extends in different directions. The guide anti-backlash structure for combining the wheelchair and its control rod as described in item 1 of the patent application scope, wherein each anti-backlash positioning member is a compressible material. As described in item 2 of the patent application scope, a guide anti-backlash structure for combining a wheelchair and its joystick, wherein at least a part of the periphery of each anti-backlash positioning member is fitted with the limiting recess to have a convex arc segment, the The angle between the two ends of the convex arc segment to the center point of the anti-backlash positioning member along the convex arc segment is greater than the two tangents along the concave arc segment to the center point of the limiting concave part The angle of the concave arc segment is clamped, and each of the anti-backlash positioning members is used to guide the clamping rod to accurately align and pivotally function in the limiting concave portion. The guide anti-backlash structure for combining the wheelchair and its control rod as described in item 3 of the patent application scope, wherein each of the anti-backlash positioning members is a fan-shaped structure. The guide anti-backlash structure for combining the wheelchair and its control rod as described in Item 3 of the patent application scope, wherein each of the anti-backlash positioning members has a circular structure. The guide anti-backlash structure for combining the wheelchair and its control rod as described in item 4 or 5 of the patent application scope, wherein each anti-backlash positioning member is provided with an indicator part for the user to judge the corresponding pivot group of the snap rod In the direction and position of the limiting recess.

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