CN103845161B - A kind of fully collapsible invalid's chair mechanism that links - Google Patents

Abstract

The invention discloses a linkage folding wheelchair mechanism, which aims to provide a wheelchair mechanism that can be quickly folded and unfolded, including a chair back adjustment mechanism, a lifting mechanism, and a locking mechanism. The gist of the technical solution is that the lifting mechanism drives the chair back adjustment mechanism through the connecting rod to realize one-step folding and unfolding of the wheelchair. The present invention is suitable for the elderly and disabled persons.

Description

A linkage folding wheelchair mechanism

technical field

The invention relates to the field of wheelchairs, in particular to a linkage folding wheelchair mechanism.

Background technique

As the phenomenon of population aging in my country is becoming more and more serious, it is particularly important to pay attention to the mental health of the elderly and improve the quality of life of the elderly. At the same time, with the progress of society and the development of the times, the society pays more and more attention to the disabled. Wheelchairs provide superior means of transportation for the elderly and the disabled, improving their freedom of movement. However, ordinary wheelchairs are heavy, have a fixed structure, take up a lot of space, and are not easy to carry around. Therefore, it is necessary to design a wheelchair that can be folded quickly. Mechanism, in order to meet the requirements of users that the wheelchair takes up little space and is easy to carry when going out, it becomes extremely important.

Contents of the invention

The purpose of the present invention is to provide a linkage folding wheelchair mechanism to overcome the deficiencies in the prior art, and provide a linkage folding wheelchair mechanism that is easy to fold and easy to carry for persons with disabilities.

In order to achieve the above object, the technical scheme adopted in the present invention is:

A linkage folding wheelchair mechanism, comprising a seat seat arranged horizontally, and a seat back vertically hinged to the rear side of the seat seat, a wheel frame with wheels is arranged under the seat seat, and the feature is that: the front ends of the two sides of the wheel frame The connecting rods extending obliquely and backward are respectively hinged through the fulcrums, and the top ends of the connecting rods on both sides are respectively hinged to the rear end of the corresponding side of the seat through the fulcrums, and the two ends of the rear side of the wheel frame are respectively hinged with sleeve rods extending obliquely forward through the fulcrums , telescopic rods are slidingly installed in the two sleeve rods respectively, and the top ends of the telescopic rods in the sleeve rods on both sides are respectively hinged to the front end of the corresponding side of the seat through fulcrums, and a cross bar is arranged horizontally between the two sleeve rods, and the cross bar The two ends are respectively connected with collars, and the collars at both ends of the cross bar are respectively set on the corresponding side sleeve rods. Armrests extending horizontally forward are respectively hinged through fulcrums, and the bottom of the front side of each armrest is respectively hinged with armrest support rods extending downward through fulcrums, and the bottom ends of the armrest support rods on both sides are respectively hinged on the corresponding side of the seat through fulcrums, each The rear part of the armrest support rod is respectively provided with a chute along the body of the armrest support rod. Sliders are respectively slidably installed in the chute. Each slider is hinged with a connecting rod extending backward through a fulcrum, and the bottom of the connecting rod on both sides The ends are respectively hinged on the corresponding side connecting rods through fulcrums.

The above-mentioned linkage folding wheelchair mechanism is characterized in that: a locking mechanism is installed on the telescopic rod, when the locking element is not locked, the locking element is restricted by the inner wall of the sleeve rod, so that the locking spring is in a compressed state, and when the telescopic rod When stretched to the position of the unlocking button, the locking element pops out from the hole of the sleeve rod under the action of the spring to limit the relative movement of the sleeve rod and the telescopic rod and push up the unlocking button; to release the locked state, press the unlocking button , the locking element is pressed out of the hole of the sleeve rod, and the sleeve rod and the telescopic rod can move relatively.

The linkage folding wheelchair mechanism described above is characterized in that: when unfolding the linkage folding wheelchair mechanism, the telescopic rod is dragged outward, so that the sleeve rod rotates counterclockwise, the connecting rod rotates clockwise, and the connecting rod and the telescopic rod are lifted together At the same time, the connecting rod drives the connecting rod to move to push the armrest support rod to adjust the seat back. When the telescopic rod moves to the locked position, the locking spring in the telescopic rod makes the locking element and the unlock button spring up, realizing the sleeve rod Locking with the telescopic rod; when folding the linkage folding wheelchair mechanism, release the locking mechanism, push the telescopic rod inward, make the sleeve rod rotate clockwise, the connecting rod rotate counterclockwise, and the connecting rod and the telescopic rod together drag the seat Moving downward, the connecting rod pushes the armrest support rod to rotate clockwise through the connecting rod, and the armrest support rod drives the chair back to rotate clockwise through the armrest, finally realizing the overall folding of the linkage folding wheelchair mechanism.

The linkage folding wheelchair mechanism is characterized in that the top end of the connecting rod can also slide upwards along the chute that can define the hinge position on the armrest support rod under the drive of the slider, driving the armrest support rod to rotate counterclockwise, The armrest support rod drives the chair back to rotate counterclockwise through the armrest to realize the adjustment of the chair back.

Compared with the prior art, the advantages of the present invention are: (1) one-step adjustment is realized through the connecting rod, and the operation is simple and fast; (2) it takes up little space and is easy to carry.

Description of drawings

Fig. 1 is a three-dimensional schematic diagram of a linkage folding wheelchair mechanism of the present invention.

Fig. 2 is a cross-sectional view of a locking mechanism of a linkage folding wheelchair according to the present invention.

Fig. 3 is a left view of a linkage folding wheelchair mechanism of the present invention.

Fig. 4 is a schematic diagram of the mechanism principle of a linkage folding wheelchair mechanism of the present invention.

Fig. 5 is a folding schematic diagram of a linkage folding wheelchair mechanism of the present invention.

detailed description

As shown in Figures 1-5, a linkage folding wheelchair mechanism includes a seat A14 arranged horizontally, and a chair back A11 vertically hinged on the rear side of the seat A14, and a wheel with wheels is arranged under the seat A14. The front ends of both sides of the wheel frame are respectively hinged with connecting rods B13 that extend obliquely and backward through fulcrums 22. The top ends of the connecting rods B13 on both sides are respectively hinged at the rear end of the corresponding side of the seat A14 through fulcrums 11. The two ends of the rear side of the wheel frame are respectively A sleeve rod B12 extending obliquely forward is hinged through the fulcrum 21, and telescopic rods B11 are respectively slidably installed in the two sleeve rods B12. At the front end of the side, a cross bar B14 is arranged horizontally between the two sleeve rods B12, and the two ends of the cross bar B14 are respectively connected with collars, and the collars at both ends of the cross bar B14 are respectively set on the corresponding side sleeve bars B12, and the connecting rod B13 The rod shafts are respectively hinged on the corresponding side rail B14 collars through fulcrums 23, and the armrests A12 extending horizontally forward are respectively hinged on both sides of the chair back A11 through fulcrums 12, and the front and bottom of each armrest A12 are respectively hinged through fulcrums 13 in a direction The armrest support rod A13 extending downward, the bottom ends of the armrest support rod A13 on both sides are respectively hinged on the corresponding side of the seat A14 through the fulcrum 16. Sliders 15 are respectively slidably installed in the slots, and each slider 15 is respectively hinged with connecting rods A15 extending obliquely and backwards through fulcrums 14, and the bottom ends of the connecting rods A15 on both sides are respectively hinged to the corresponding side connecting rods B13 through fulcrums 17. body.

A locking mechanism C is installed on the telescopic rod B11. When it is not locked, the locking element C12 is restricted by the inner wall of the sleeve rod B12, so that the locking spring C13 is in a compressed state. When the telescopic rod B11 is stretched to the position of the unlock button C11, the lock The stop element C12 pops out from the hole of the sleeve rod B12 under the action of the locking spring C13 to limit the relative movement of the sleeve rod B12 and the telescopic rod B11 and push up the unlock button C11; to release the locked state, press the unlock button C11 , the locking element C12 is pressed out of the hole of the sleeve rod B12, and the sleeve rod B12 and the telescopic rod B11 can move relative to each other. The locked state is shown in FIG. 2 .

When unfolding the linkage folding wheelchair mechanism, drag the telescopic rod B11 outward, so that the sleeve rod B12 rotates counterclockwise, the connecting rod B13 rotates clockwise, the connecting rod B13 and the telescopic rod B11 lift the seat A14 together, and the connecting rod B13 drives The connecting rod A15 moves to push the armrest support rod A13 to adjust the seat back A11. When the telescopic rod B11 moves to the locked position, the locking spring C13 in the telescopic rod B11 makes the locking element C12 and the unlocking button C11 spring up to realize the sleeve The locking between the rod B12 and the telescopic rod B11; when folding the linkage folding wheelchair mechanism, press the locking button C11 to release the locking mechanism C, push the telescopic rod B11 inward, make the sleeve rod B12 rotate clockwise, and the connecting rod B13 counterclockwise Turn clockwise, the connecting rod B13 and the telescopic rod B11 together drag the seat A14 to move downward, and at the same time, the connecting rod B13 pushes the armrest support rod A13 to rotate clockwise through the connecting rod A15, and the armrest support rod A13 drives the chair back A11 clockwise through the armrest A12 Rotate to finally realize the overall folding of the linkage folding wheelchair mechanism.

The top of the coupling rod A15 can also slide upwards along the chute that can limit the hinge position on the armrest support rod A13 under the drive of the slider 15, driving the armrest support rod A13 to rotate counterclockwise, and the armrest support rod A13 drives the chair back through the armrest A12. A11 rotates counterclockwise to realize the adjustment of the seat back A11.

As shown in Figures 1-4, a linkage folding wheelchair mechanism includes a pair of seat back adjustment mechanisms A, a pair of lifting mechanisms B, and a pair of locking mechanisms C. The chair back adjusting mechanism A is composed of the chair back A11, the armrest A12, the armrest support rod A13, the seat A14, and the connecting rod A15. The armrest A12 and the armrest support rod A13 are hinged at the fulcrum 13, and the armrest support rod A13 and the seat A14 are hinged at the fulcrum 16. The armrest support rod 13 is provided with a vertical chute, and a slider 15 is slidably installed in the chute, and the connecting rod One end of A15 is hinged to the fulcrum 14 with the armrest support rod A13 and can slide along the upper chute of the handrail support rod A13 under the drive of the slider 15, and the other end is hinged with the connecting rod B13 to the fulcrum 17; the lifting mechanism consists of a telescopic rod B11, a sleeve rod B12, connecting rod B13 and cross bar B14 are formed, the sleeve rod B12 is sleeved on the telescopic rod B11, and can slide relatively, and the two ends of the cross rod B14 are respectively sleeved on the sleeve rod B12, and are hinged with the connecting rod B13 and the fulcrum 23; The locking mechanism C is installed on the telescopic rod B11. When the telescopic rod B11 moves to the locked position, the locking element C12 pops up, and the locking mechanism C takes effect.

As shown in Figure 4, when the linkage folding wheelchair mechanism is unfolded, the telescopic rod B11 is dragged outward, so that the sleeve rod B12 rotates counterclockwise around the fulcrum 21, the connecting rod B13 rotates clockwise around the fulcrum 22, and the connecting rod B13 and the telescopic rod B11 Lift the seat A14 together, and at the same time, the connecting rod B13 drives the armrest support rod A13 to rotate counterclockwise around the fulcrum (16) through the connecting rod A15, and the armrest support rod A13 pushes the chair back A11 to rotate counterclockwise around the fulcrum 11 through the armrest A12. When moving to the locked position, the locking element C12 pops up, and the locking mechanism C takes effect, realizing the overall unfolding of the linkage folding wheelchair mechanism. The unfolding effect is shown in Figure 1.

The right end of the coupling rod A15 can also slide upwards along the chute on the armrest support rod A13 that can define the hinge position, driving the armrest support rod A13 to rotate counterclockwise around the fulcrum 16, and the armrest support rod A13 drives the chair back A11 around the fulcrum through the armrest A12 11 Turn counterclockwise to realize the adjustment of the chair back.

When folding the linkage folding wheelchair mechanism, press the unlock button C11 to release the locking mechanism C, push the telescopic rod B11 inward, so that the sleeve rod B12 rotates clockwise around the fulcrum 21, the connecting rod B13 rotates counterclockwise around the fulcrum 22, and the connecting rod B13 Together with the telescopic rod B11, the seat A14 is dragged downward, and at the same time, the connecting rod B13 pushes the armrest support rod A13 to rotate clockwise around the fulcrum 16 through the connecting rod A15, and the armrest support rod A13 drives the chair back A11 to rotate clockwise around the fulcrum 11 through the armrest A12. Rotate to finally realize the overall folding of the linkage folding wheelchair mechanism, and the final folding effect is shown in Figure 5.

Claims (4)

1. A linkage folding wheelchair mechanism, comprising a seat seat arranged horizontally, and a chair back vertically hinged on the rear side of the seat seat, a wheel frame with wheels is arranged under the seat seat, and the front ends of the two sides of the wheel frame respectively pass through The fulcrum is hinged with a connecting rod that extends obliquely backward, and the top ends of the connecting rods on both sides are respectively hinged to the rear end of the corresponding side of the seat through the fulcrum. The two sleeve rods are respectively slidingly installed with telescopic rods, and the top ends of the telescopic rods in the sleeve rods on both sides are respectively hinged to the front end of the corresponding side of the seat through fulcrums, and a cross bar is arranged horizontally between the two sleeve rods. The two ends of the cross bar are respectively connected with collars, and the collars at both ends of the cross bar are respectively sleeved on the corresponding side sleeve rods. Horizontally extending armrests are respectively hinged on both sides through fulcrums, and the bottom of the front side of each armrest is respectively hinged with downwardly extending armrest support rods through fulcrums. The rear part of each handrail support rod is respectively provided with a chute along the body of the handrail support rod, and a slider is respectively slidably installed in the chute, and each slider is hinged with a connecting rod extending obliquely and backward through a fulcrum, and the two sides are connected. The bottom ends of the rods are respectively hinged on the corresponding side connecting rod rods through fulcrums. 2. A linkage folding wheelchair mechanism according to claim 1, characterized in that: a locking mechanism is installed on the telescoping rod, when the locking element is not locked, the locking element is restricted by the inner wall of the sleeve rod, so that the locking spring is in the In the compressed state, when the telescopic rod is stretched to the position of the unlocking button, the locking element will pop out from the hole of the sleeve rod under the action of the spring to limit the relative movement of the sleeve rod and the telescopic rod and push up the unlocking button; unlocking state, then press the unlock button, the locking element is pressed out of the hole of the sleeve rod, and the sleeve rod and the telescopic rod can move relatively. 3. A linkage folding wheelchair mechanism according to claim 1, characterized in that: when unfolding the linkage folding wheelchair mechanism, the telescopic rod is dragged outward, so that the sleeve rod rotates counterclockwise, the connecting rod rotates clockwise, and the connecting rod rotates clockwise. The rod and the telescopic rod lift the seat together, and the connecting rod drives the connecting rod to move to push the armrest support rod to adjust the seat back. When the telescopic rod moves to the locked position, the locking spring in the telescopic rod makes the locking element and the unlock button spring. When folding the linkage folding wheelchair mechanism, press the unlock button to release the locking mechanism, push the telescopic rod inward, make the sleeve rod rotate clockwise, and the connecting rod rotate counterclockwise. The connecting rod and the telescopic rod together drag the seat to move downwards, and at the same time, the connecting rod pushes the armrest support rod to rotate clockwise through the connecting rod, and the armrest support rod drives the seat back to rotate clockwise through the armrest, finally realizing the overall folding of the linkage folding wheelchair mechanism. 4. A linkage folding wheelchair mechanism according to claim 1, characterized in that: the top end of the connecting rod can also slide upwards along the chute on the armrest support rod that can define the hinge position under the drive of the slider, driving the armrest The support rod rotates counterclockwise, and the armrest support rod drives the chair back to rotate counterclockwise through the armrest to realize the adjustment of the chair back.