CN211095394U - Automatic locking device for folding wheelchair during opening - Google Patents

Abstract

The utility model discloses an automatic locking device when a folding wheelchair is unfolded, which comprises an upper stay bar, wherein both ends of the upper stay bar are pivoted with a wheelchair backrest; the upper pivot arm is sleeved and fixed at two ends of the upper stay bar, one end of the upper pivot arm is pivoted with the lower pivot arm, the other end of the upper pivot arm penetrates through an adjusting bolt, the adjusting bolt is movably pressed against the lower pivot arm, the upper end of the adjusting bolt is limited and pressed against through a nut, and the lower end of the adjusting bolt is sleeved with a compression spring; a lower stay bar is penetrated and connected with the lower pivot arm, and both ends of the lower stay bar are pivoted with the wheelchair wheels; the buckling block is fixed in the center of the upper stay bar; and the adjusting seat is arranged on the lower support rod and movably presses the buckling block. The utility model discloses a seat is adjusted in the cooperation of lock joint piece, and vaulting pole and lower vaulting pole on the location, the setting wheelchair avoids lacking the location when folding wheelchair was opened in the past, the trouble of easy deformation.

Description

Automatic locking device for folding wheelchair during opening

Technical Field

The application belongs to the technical field of wheelchairs, and particularly relates to an automatic locking device for a folding wheelchair when the folding wheelchair is opened.

Background

Wheelchairs sold in the current market are divided into fixed wheelchairs and foldable wheelchairs, and the foldable wheelchairs can be conveniently stored and are increasingly popular in the market. However, the existing folding wheelchair lacks an automatic lock catch when being unfolded for use, and in order to prevent the folding from being restored to be deformed, the parts are in interference fit during design, the friction is increased, the use is very troublesome, and a device capable of automatically locking when the wheelchair is unfolded is lacked.

SUMMERY OF THE UTILITY MODEL

In view of this, the technical problem that the application will solve is to provide an automatic locking device when a folding wheelchair is opened, which is used for positioning an upper stay bar and a lower stay bar through a locking block matching with an adjusting seat to shape the wheelchair, thereby avoiding the trouble that the folding wheelchair is lack of positioning and easy to deform when being opened.

In order to solve the technical problem, the utility model discloses an automatic locking device when the folding wheelchair is unfolded, which comprises an upper stay bar, wherein both ends of the upper stay bar are pivoted with a wheelchair backrest; the upper pivot arm is sleeved and fixed at two ends of the upper stay bar, one end of the upper pivot arm is pivoted with the lower pivot arm, the other end of the upper pivot arm penetrates through an adjusting bolt, the adjusting bolt is movably pressed against the lower pivot arm, the upper end of the adjusting bolt is limited and pressed against through a nut, and the lower end of the adjusting bolt is sleeved with a compression spring; a lower stay bar is penetrated and connected with the lower pivot arm, and both ends of the lower stay bar are pivoted with the wheelchair wheels; the buckling block is fixed in the center of the upper stay bar; and the adjusting seat is arranged on the lower support rod and movably presses the buckling block.

According to an embodiment of the present invention, the fastening block is pressed against the lower stay bar by an upper end radian and has a fastening groove facing the adjusting seat; the adjusting seat comprises guide post sleeves arranged on the lower supporting rods at intervals, and the guide post sleeves are provided with opposite sliding grooves; the pull rods are respectively arranged in the guide post sleeves in a penetrating way, the outer ends of the pull rods positioned in the guide post sleeves are connected through pull pieces, and the inner ends of the pull rods are connected through buckling rods corresponding to the buckling grooves; and a spring sleeved on the pull rod and positioned in the guide post sleeve; wherein, the pull piece is pulled to drive the pull rod expansion spring, so that the buckling rod is buckled with or separated from the buckling groove.

According to the present invention, when the fastening groove is formed on the upper end of the adjusting bolt, the adjusting bolt presses the supporting portion of the pivot arm, and the supporting portion adheres to the rubber pad.

According to an embodiment of the present invention, the upper arm is bent and pivoted to the lower arm.

According to an embodiment of the present invention, the lower stay further has an extension portion connected to the seat of the wheelchair.

Compared with the prior art, the application can obtain the following technical effects:

the buckling blocks are matched with the adjusting seat to position the upper support rod and the lower support rod, so that the wheelchair is shaped, and the trouble that the conventional folding wheelchair is lack of positioning and easy to deform when being opened is avoided.

Of course, it is not necessary for any one product to achieve all of the above-described technical effects simultaneously.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

FIG. 1 is a perspective view of an automatic latching device of an embodiment of the present application when the folding wheelchair is unfolded;

fig. 2 is a schematic view illustrating installation of the fastening block and the adjusting base according to the embodiment of the present application.

Reference numerals

The adjustable hinge comprises an upper support rod 10, an upper pivot arm 20, a lower pivot arm 30, an adjusting bolt 40, a compression spring 50, a lower support rod 60, a buckling block 70, a buckling groove 71, an adjusting seat 80, a guide post sleeve 81, a sliding groove 82, a pull rod 83, a pull piece 84, a buckling rod 85 and a support part 90.

Detailed Description

Embodiments of the present application will be described in detail with reference to the drawings and examples, so that how to implement technical means to solve technical problems and achieve technical effects of the present application can be fully understood and implemented.

Referring to fig. 1 and 2 together, fig. 1 is a perspective view of an automatic locking device when a folding wheelchair according to an embodiment of the present application is unfolded; fig. 2 is a schematic view illustrating installation of the fastening block and the adjusting base according to the embodiment of the present application. As shown in the figure, the automatic locking device for the unfolded folding wheelchair comprises an upper support rod 10, wherein two ends of the upper support rod 10 are pivoted with a wheelchair backrest; the upper pivot arm 20 is sleeved and fixed at two ends of the upper stay bar 10, one end of the upper pivot arm 20 is pivoted with the lower pivot arm 30, the other end of the upper pivot arm 20 penetrates through an adjusting bolt 40, the adjusting bolt 40 is movably pressed against the lower pivot arm 30, the upper end of the adjusting bolt 40 is limited and pressed against through a nut, and the lower end of the adjusting bolt is sleeved with a compression spring 50; a lower stay bar 60 is penetrated and connected with the lower pivot arm 30, and both ends of the lower stay bar 60 are pivoted with the wheelchair wheels; a fastening block 70 fixed to the center of the upper stay 10; and an adjusting seat 80 installed on the lower stay 60 and movably pressing the fastening block 70.

In an embodiment of the present invention, the two ends of the upper supporting rod 10 are connected to the backrest of the wheelchair, the two ends of the lower supporting rod 60 are connected to the wheels of the wheelchair, and an extending support part connected to the seat of the wheelchair can be further provided on the lower supporting rod 60 to connect to the whole frame of the wheelchair. The upper stay 10 is pivoted to the lower pivot arm 30 sleeved on the lower stay 60 by the sleeved upper pivot arm 20, and the other end opposite to the pivoted position is stopped by the adjusting bolt 40. Specifically, the adjusting bolt 40 is installed on the upper pivot arm 20, the lower end is sleeved with the compression spring 50, the upper end is limited by a nut, and the adjusting bolt can be pressed on the lower pivot arm 30 in an abutting mode, so that the effect of buffering and shock absorption can be achieved when the wheelchair is opened. Preferably, the upper arm 20 is bent and pivoted to the lower arm 30 with a bending angle, so as to form a certain expansion stroke of the adjusting bolt 40.

In addition, the upper stay bar 10 and the lower stay bar 60 are movably buckled with the adjusting seat 80 through the buckling block 70, that is, when the folding wheelchair rotates the upper stay bar 10 and the lower stay bar 60, along with the integral folding rotation, the buckling block 70 and the adjusting seat 80 can be separated and folded, and the wheelchair can also be buckled and unfolded, so that the automatic buckle positioning function is enhanced.

In detail, the fastening block 70 is pressed against the lower stay 60 by an upper end arc, and has a fastening groove 71 facing the adjusting seat 80; the adjusting seat 80 comprises a guide post sleeve 81 arranged at intervals on the lower support rod 60, and the guide post sleeve 81 is provided with a sliding groove 82 opposite to the sliding groove; the pull rods 83 respectively penetrate through the guide column sleeves 81, the outer ends of the pull rods 83, which are positioned on the guide column sleeves 81, are connected through pull pieces 84, and the inner ends of the pull rods are connected through buckling rods 85 corresponding to the buckling grooves 71; and a spring sleeved on the pull rod 83 and located in the guide post sleeve 81; wherein, the pull tab 84 is pulled to drive the pull rod 83 to extend and contract the spring, so that the buckling rod 85 is buckled with or separated from the buckling groove 71. Further, when the fastening rod 85 is fastened to the fastening groove 71, the adjusting bolt 40 presses against the support portion 90 extending from the lower pivot arm 30, and the support portion 90 is adhered with a rubber pad. Therefore, when the upper stay bar 10 and the lower stay bar 60 are opened and the adjusting bolt 40 is used for abutting and buffering, the buckling rod 85 of the adjusting seat 80 is buckled on the buckling groove 71 of the buckling block 70, so that automatic buckling is realized, the trouble that the folding wheelchair is easy to deform and reset due to the lack of the buckling in the prior art is avoided, and the use is more comfortable.

The foregoing description shows and describes several preferred embodiments of the present application, but as aforementioned, it is to be understood that the application is not limited to the forms disclosed herein, but is not to be construed as excluding other embodiments and is capable of use in various other combinations, modifications, and environments and is capable of changes within the scope of the application as described herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the application, which is to be protected by the claims appended hereto.

Claims (5)

1. An automatic locking device when a folding wheelchair is unfolded, which is characterized by comprising:

the two ends of the upper stay bar are pivoted with the wheelchair backrest;

the upper pivot arm is sleeved and fixed at two ends of the upper stay bar, one end of the upper pivot arm is pivoted with the lower pivot arm, the other end of the upper pivot arm penetrates through an adjusting bolt, the adjusting bolt is movably pressed against the lower pivot arm, the upper end of the adjusting bolt is limited and pressed against the lower pivot arm through a nut, and the lower end of the adjusting bolt is sleeved with a compression spring;

a lower stay bar is penetrated and connected with the lower pivot arm, and two ends of the lower stay bar are pivoted with wheelchair wheels;

the buckling block is fixed in the center of the upper stay bar; and

and the adjusting seat is arranged on the lower support rod and movably presses and buckles the buckling block.

2. The automatic locking device for the unfolded foldable wheelchair as claimed in claim 1, wherein the locking block is pressed against the lower stay by an upper arc and has a locking groove facing the adjustment seat; the adjusting seat comprises guide post sleeves arranged on the lower support rod at intervals, and the guide post sleeves are provided with opposite sliding grooves; pull rods respectively penetrating through the guide post sleeves, wherein the outer ends of the pull rods positioned on the guide post sleeves are connected through pull pieces, and the inner ends of the pull rods are connected through buckling rods corresponding to the buckling grooves; the spring is sleeved on the pull rod and positioned in the guide post sleeve; wherein the pulling piece is pulled to drive the pull rod to stretch out and draw back the spring, so that the buckling rod is buckled with or separated from the buckling groove.

3. The folding wheelchair automatic locking device as claimed in claim 2, wherein the adjusting bolt presses against a leg portion of the lower pivot arm extending when the buckle lever is fastened to the buckle groove, the leg portion being adhered with a rubber pad.

4. The folding wheelchair automatic latching device when unfolded of claim 1, wherein the upper pivot arm is bent to be pivoted toward the lower pivot arm.

5. The apparatus according to claim 1, wherein the lower stay further has an extension leg connected to a seat of the wheelchair.

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