CN216021740U - Self-locking structure for unfolding and folding portable wheelchair - Google Patents

Abstract

The utility model provides a self-locking structure for unfolding and folding a portable wheelchair, which is characterized by comprising a connecting shaft, a positioning block, a locking column, a locking hook, a connecting plate and an operating handle, wherein the two folding cross beams are respectively and rotatably connected with the locking hook through the connecting shaft; the bottoms of the two locking hooks are respectively provided with a connecting plate; the connecting plate is connected with one end of an extension spring, and the limiting sheet is connected with the other end of the extension spring; an operating handle is arranged between the opposite side walls of the two locking hooks through bolts; the bottom of the locking hook is provided with a locking groove; positioning blocks are welded on the front side walls of the two folding vertical beams respectively; the locking column is arranged inside the positioning block through the bolt, and the foldable wheelchair is arranged on the folding cross beam and the folding vertical beam of the vehicle body through the design, so that the purposes of improving the stability of the unfolded foldable wheelchair and unlocking convenience are achieved.

Description

Self-locking structure for unfolding and folding portable wheelchair

Technical Field

The utility model relates to the technical field of wheelchair components, in particular to a self-locking structure for unfolding and folding a portable wheelchair.

Background

The wheelchair is a chair provided with wheels and capable of helping to replace disabled persons to assist in walking, is generally divided into electric and manual folding wheelchairs and is generally used as an important mobile tool for home rehabilitation, turnover transportation, diagnosis and outgoing activities of the disabled persons, and not only can the wheelchair meet the needs of physically disabled persons and persons with mobility difficulty, but also more importantly, the wheelchair is convenient for the family members to move and care for the patients, so that the patients can use the wheelchair to perform physical exercises and participate in social activities;

in order to facilitate the storage at home and save the occupied space, therefore, the wheelchair on the market is a foldable wheelchair, when the foldable wheelchair is unfolded, the foldable wheelchair needs to be positioned and locked by using a structure carried by the wheelchair, so as to ensure that the wheelchair can have good stability and firmness after being unfolded, and is used for avoiding secondary injury caused by incapability of locking for the disabled, after the foldable wheelchair is unfolded, single-point positioning and locking are mostly carried out between the cross beam and the vertical beam through a small spring pin and a clamping groove in the prior art, the locking mode has poor locking stability after being unfolded and has no good bearing capacity, the firmness of the wheelchair body is greatly reduced, and no small potential safety hazard is brought to the disabled, and the single-point locking mode in the prior art has a complicated unlocking mode, although the locking mode in the prior art can realize automatic locking after being unfolded, however, when the vehicle body needs to be folded again, the user still needs to squat down and operate the locking mechanism to unlock, which results in poor practicability of the prior art.

SUMMERY OF THE UTILITY MODEL

According to the technical problem, the utility model provides a self-locking structure for unfolding and folding a portable wheelchair, which is characterized by comprising two limiting pieces, a connecting shaft, a positioning block, a locking column, a locking hook, a connecting plate and an operating handle, wherein the number of folding cross beams is two; the bottoms of the two folding cross beams are respectively welded with a limiting piece; the limiting piece is of an L-shaped structure; mounting holes are respectively formed in the two folding cross beams, connecting shafts are movably connected in the mounting holes, and the two connecting shafts are respectively and rotatably connected with locking hooks; the bottoms of the two locking hooks are respectively provided with a connecting plate; the connecting plate and the locking hook are of an integrally formed structure; a first through hole is formed in the connecting plate, one end of the connecting plate, which is connected with the extension spring, is connected with the connecting plate through the first through hole, and a second through hole is formed in the limiting sheet; the limiting piece is connected with the other end of the extension spring through the second through hole; an operating handle is arranged between the opposite side walls of the two locking hooks through bolts; the bottom of the locking hook is provided with a locking groove; the front side of the folding beam is provided with a folding vertical beam; the number of the folding vertical beams is two; positioning blocks are welded on the front side walls of the two folding vertical beams respectively; the inner part of the positioning block is provided with a mounting groove, and a locking column is mounted in the mounting groove through a bolt; the locking hook is matched and locked with the locking column through the locking groove.

The utility model has the beneficial effects that:

the utility model realizes the purposes of improving the stability of the unfolded folding wheelchair and the unlocking convenience by installing the limiting sheet, the connecting shaft, the positioning block, the locking column, the locking hook, the connecting plate, the locking groove, the extension spring and the operating handle on the folding cross beam and the folding vertical beam which are arranged on the body of the folding wheelchair, when the folding wheelchair is used and the folded state of the folding wheelchair is operated to the unfolded state, a user only needs to pull up the backrest frame of the body of the folding wheelchair upwards and backwards, the backrest frame drives the folding vertical beam to enable the locking column to move forwards along an arc-shaped track, so that the locking column is in contact with the inclined plane of the locking hook, the locking column can jack up the locking hook under the action of the inclined plane, the locking hook rotates by taking the connecting shaft as the center of a circle, the extension spring is pulled, and when the locking column slides into the locking groove of the locking hook, the tension applied to the extension spring can be released instantly, because the operating handle is connected with the left locking hook and the right locking hook at the same time, the two locking hooks are locked synchronously, the positioning and locking between the folding cross beam and the folding vertical beam are realized, and the process of unfolding and automatically locking the whole folding wheelchair is finally completed; when the folding wheelchair is unlocked, a user does not need to squat down, and only needs to move the operating handle upwards to drive the two locking hooks on the left side and the right side to move upwards to pull the extension spring to separate the locking hooks from the locking columns, then the operating handle is loosened, the locking hooks rebound to the original positions under the action of the extension spring, the locking hooks are limited through the limiting pieces, unlocking is completed between the folding cross beam and the folding vertical beam, and the unlocking process of the folding wheelchair is completed; according to the utility model, the mode of single-point locking by using a spring pin in the prior art is replaced, the mode of multi-point locking by using two locking hooks is improved, the stability and the firmness of the unfolded vehicle body are greatly improved, the unlocking of the vehicle body can be completed and the folding can be completed only by pulling the operating handle, the convenience of unlocking the vehicle body is further improved, the vehicle does not need to squat to operate a locking device, and the practicability of the utility model is greatly improved.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the overall structure of the present invention without a locking hook;

FIG. 3 is a schematic view of an external structure of the locking hook of the present invention;

FIG. 4 is a schematic view of an appearance structure of the spacing piece of the present invention;

fig. 5 is a schematic view of the overall installation position of the present invention.

As shown in the figure: 1-folding cross beam, 11-limiting piece, 12-connecting shaft, 2-folding vertical beam, 21-positioning block, 22-locking column, 3-locking hook, 31-connecting plate, 32-locking groove, 4-extension spring and 5-operating handle.

Detailed Description

Example 1

The utility model provides a self-locking structure for unfolding and folding a portable wheelchair, which is characterized by comprising two folding cross beams 1, two limiting pieces 11, a connecting shaft 12, two folding vertical beams 2, a positioning block 21, two locking columns 22, two locking hooks 33, a connecting plate 31 and an operating handle 5; the bottoms of the two folding cross beams 1 are respectively welded with a limiting piece 11; the limiting sheet 11 is of an L-shaped structure; mounting holes are respectively formed in the two folding cross beams 1, connecting shafts 12 are movably connected in the mounting holes, and the two connecting shafts 12 are respectively and rotatably connected with locking hooks 33; the bottoms of the two locking hooks 33 are respectively provided with a connecting plate 31; the connecting plate 31 and the locking hook 33 are of an integrally formed structure; a first through hole is formed in the connecting plate 31, one end of the connecting plate 31 connected with the extension spring 4 is connected with the first through hole, and a second through hole is formed in the limiting piece 11; the limiting piece 11 is connected with the other end of the extension spring 4 through the second through hole; an operating handle 5 is installed between the opposite side walls of the two locking hooks 33 through bolts; the bottom of the locking hook 33 is provided with a locking groove 32; the front side of the folding beam 1 is provided with a folding vertical beam 2; the number of the folding vertical beams 2 is two; the front side walls of the two folding vertical beams 2 are respectively welded with a positioning block 21; the positioning block 21 is internally provided with a mounting groove, and the mounting groove is internally provided with a locking column 22 through a bolt; the locking hook 33 is locked by the locking groove 32 and the locking column 22.

Example 2

When the utility model is used, and the folding state of the folding wheelchair is operated to the unfolding state, a user only needs to pull up the backrest frame of the wheelchair body, the backrest frame drives the folding vertical beam 2 to enable the locking column 22 to move forwards in an arc-shaped track in the forward direction, the locking column 22 is enabled to be contacted with the inclined surface of the locking hook 33, the locking column 22 will jack up the locking hook 33 due to the action of the inclined surface, so that the locking hook 33 rotates around the connecting shaft 12, the extension spring 4 is pulled, when the locking post 22 slides into the locking groove 32 of the locking hook 33, the tension applied to the extension spring 4 is instantaneously released, because the operating handle 5 is connected with the left locking hook 33 and the right locking hook 33 at the same time, the two locking hooks 33 are locked synchronously, the positioning and locking between the folding cross beam 1 and the folding vertical beam 2 are realized, and the process of unfolding and automatically locking the whole folding wheelchair is finally completed; when the folding wheelchair of unblock, the user need not to squat down, only need move operating handle 5 upwards and will drive two locking hooks 33 of left and right sides and move upwards, pulling extension spring 4, make locking hook 33 break away from with locking post 22, later loosen operating handle 5, locking hook 33 kick-backs to the primary importance under extension spring 4's effect, and spacing through spacing piece 11 to locking hook 33, make and accomplish the unblock between folding crossbeam 1 and the folding perpendicular roof beam 2, accomplish the unblock process of folding wheelchair.

The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. While the utility model has been described with respect to the above embodiments, it will be understood by those skilled in the art that the utility model is not limited to the above embodiments, which are described in the specification and illustrated only to illustrate the principles of the utility model, but that various changes and modifications may be made without departing from the spirit and scope of the utility model as defined by the appended claims. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims (4)

1. A self-locking structure for unfolding and folding a portable wheelchair is characterized by comprising two limiting pieces, a connecting shaft, a positioning piece, a locking column, a locking hook, a connecting plate and an operating handle, wherein the number of folding cross beams is two; the bottoms of the two folding cross beams are respectively welded with a limiting piece; mounting holes are respectively formed in the two folding cross beams, connecting shafts are movably connected in the mounting holes, and the two connecting shafts are respectively and rotatably connected with locking hooks; the bottoms of the two locking hooks are respectively provided with a connecting plate; a first through hole is formed in the connecting plate, one end of the connecting plate, which is connected with the extension spring, is connected with the connecting plate through the first through hole, and a second through hole is formed in the limiting sheet; the limiting piece is connected with the other end of the extension spring through the second through hole; an operating handle is arranged between the opposite side walls of the two locking hooks through bolts; the bottom of the locking hook is provided with a locking groove; the front side of the folding beam is provided with a folding vertical beam; the number of the folding vertical beams is two; positioning blocks are welded on the front side walls of the two folding vertical beams respectively; the inside of locating piece has seted up the mounting groove, and the locking post is installed through the bolt in the inside of this mounting groove.

2. The self-locking structure for unfolding and folding of a portable wheelchair as claimed in claim 1, wherein the limiting piece is of an L-shaped structure.

3. The self-locking structure for unfolding and folding of a portable wheelchair as claimed in claim 1, wherein the connecting plate and the locking hook are of an integrally formed structure.

4. The self-locking structure for unfolding and folding of a portable wheelchair as claimed in claim 1, wherein the locking hook is locked by the locking groove in cooperation with the locking post.

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