CN219847141U

CN219847141U - Wheelchair lifting handrail

Info

Publication number: CN219847141U
Application number: CN202321164576.2U
Authority: CN
Inventors: 包仁人; 陈禹希; 冯健; 沈庆杰; 艾宏远; 李学威; 杜振军
Original assignee: Shenyang Siasun Robot and Automation Co Ltd
Current assignee: Shenyang Siasun Robot and Automation Co Ltd
Priority date: 2023-05-16
Filing date: 2023-05-16
Publication date: 2023-10-20
Anticipated expiration: 2033-05-16

Abstract

The utility model belongs to the technical field of nursing apparatuses, in particular to a wheelchair lifting handrail, which comprises a fixing frame, a handrail part, a middle connecting rod and a side connecting rod, wherein the fixing frame is arranged on the side surface of a wheelchair; the locking hooks are arranged on the armrest part through torsion springs and torsion spring mounting pin shafts, the parallelogram link mechanism is formed by the armrest part, the middle link rod, the side link rod and the fixing frame, and the fixing pins matched with the locking hooks are arranged at the upper end of the fixing frame. The utility model can integrally pull the armrest part to swing up and down to integrally lift or lower the armrest part by the parallelogram linkage mechanism formed by the armrest part, the middle connecting rod, the side connecting rod and the fixing frame, and can lower the armrest part to be lower than the height of the sitting surface of the wheelchair; even if the top of the side surface of the wheelchair is provided with the outer edge extending outwards, the handrail part can be folded to the lower side of the outer edge of the side surface of the wheelchair, the butt joint gap between the wheelchair and the bed is not affected, the wheelchair can be better attached to the bed, and the wheelchair is more convenient for patients to use during transferring.

Description

Wheelchair lifting handrail

Technical Field

The utility model belongs to the technical field of nursing apparatuses, and particularly relates to a wheelchair lifting handrail.

Background

For the disabled person and the patient with loss of lower limb functions caused by disasters, accidents or congenital diseases, the disabled person and the patient with loss of lower limb functions caused by body weakness need to be carried out on a wheelchair in the daily nursing or moving process, the patient keeps balance and supports to get up, the patient needs to hold armrests on two sides of the wheelchair to assist balance and support the body besides nursing by nursing staff, in some special cases, the wheelchair needs to be in butt joint with a bed, and the armrests are higher than the sitting surface of the wheelchair, so that the patient is not beneficial to transfer. In addition, the side outer edge of some wheelchairs is required to extend to the outer side of the wheelchairs for a part, and the armrests are required to be further arranged on the outer side of the side outer edge of the wheelchairs for affecting the butt joint gap, so that tight fit cannot be realized.

Disclosure of Invention

In view of the above problems, an object of the present utility model is to provide a wheelchair lifting armrest.

The aim of the utility model is realized by the following technical scheme:

the wheelchair lifting handrail comprises a fixing frame, a handrail part, a middle connecting rod and a side connecting rod, wherein the fixing frame is arranged on the side surface of the wheelchair;

the handrail part is provided with a locking hook through a torsion spring and a torsion spring mounting pin shaft, the handrail part is hinged with one end of the middle connecting rod and one end of the side connecting rod respectively, the other end of the middle connecting rod and the other end of the side connecting rod are hinged with the fixing frame respectively, the handrail part, the middle connecting rod, the side connecting rod and the fixing frame form a parallelogram connecting rod mechanism, and the upper end of the fixing frame is provided with a fixing pin matched with the locking hook.

And a nitrogen spring is further arranged between the middle connecting rod and the fixing frame.

The fixing frame is divided into an inner U-shaped piece and an outer U-shaped piece which are connected together, the inner U-shaped piece is fixedly connected to the inner side of the outer U-shaped piece, the fixing pin is installed at the upper end of the inner U-shaped piece, the inner U-shaped piece is hinged to the middle connecting rod, the number of the side connecting rods and the number of the nitrogen springs are two, the two nitrogen springs are respectively arranged on two sides of the middle connecting rod, one end of each nitrogen spring is hinged to the middle connecting rod, the other end of each nitrogen spring is hinged to the outer U-shaped piece, the two side connecting rods are respectively arranged on two sides of the middle connecting rod, and the other end of each side connecting rod is hinged to the outer U-shaped piece.

The armrest part comprises an upper telescopic component and a lower telescopic component;

the lower telescopic component comprises a lower frame body, the interior of the lower frame body is hollow, the locking hook is arranged at the lower end of the lower frame body through a torsion spring and a torsion spring mounting pin shaft, and the lower frame body is hinged with one end of the middle connecting rod and one end of the side connecting rod respectively;

the upper telescopic assembly comprises an upper frame body and a movable fixing structure, the upper end of the upper frame body is provided with a hand-held handrail body, the upper frame body penetrates through the lower frame body and is connected with the lower frame body through the movable fixing structure, and the lower end of the upper frame body is provided with a pressing rod part which is used for pressing the locking hook in a downward extending mode.

The movable fixing structure comprises a pull rod, a slide rail block, sliding pins and sliding blocks, wherein the upper end of the upper frame body is provided with a support pipe part for mounting the hand-held handrail body, the upper frame body at the lower side of the support pipe part is provided with a kidney-shaped hole, the upper end of the pull rod is provided with a handle part, the lower end of the pull rod is provided with two inclined guide grooves which are symmetrically arranged left and right, the handle part penetrates through the kidney-shaped hole, the lower side of the support pipe part is provided with a cylindrical pin penetrating through the handle part, the cylindrical pin between the support pipe part and the handle part of the pull rod is sleeved with a spring, the slide rail block is mounted on the upper frame body at the lower side of the kidney-shaped hole, the slide rail block is provided with a slide rail, two sliding blocks are connected in the slide rail, each sliding block is provided with one sliding pin, and each sliding pin is respectively inserted into a corresponding inclined guide groove;

when the spring presses the handle part of the pull rod to move downwards along the kidney-shaped hole, the pull rod respectively presses each sliding pin through each inclined guide groove, so that the two sliding blocks respectively slide towards the outer side of the upper frame body along the slide way and protrude out of the upper frame body; when the handle part of the pull rod is pulled to move upwards along the kidney-shaped hole, the pull rod respectively pulls each sliding pin through each inclined guide groove, so that the two sliding blocks respectively slide towards the upper frame body along the slide ways and are retracted into the upper frame body;

the upper end of the lower frame body is provided with a plurality of adjusting hole groups matched with the two sliding blocks in the vertical direction, each adjusting hole group comprises two symmetrically arranged adjusting holes, and the two sliding blocks are respectively inserted into the adjusting holes of different adjusting hole groups to adjust the overall height position of the upper telescopic assembly;

the lower frame body positioned at the lower side of the lowest adjusting hole group is provided with a positioning hole group matched with the two sliding blocks, each positioning hole group comprises two symmetrically arranged positioning holes, and when the two sliding blocks are respectively inserted into the positioning holes of the positioning hole group, the compression rod part contacts and presses the locking hooks to lift up, so that the locking hooks are separated from the fixing pins.

The supporting tube part is connected with the hand-held handrail body through a fixing screw.

The length direction of the kidney-shaped hole is parallel to the length direction of the upper frame body, and the length direction of the slideway is perpendicular to the length direction of the kidney-shaped hole.

The upper frame body is provided with a slide cover for covering the slide block.

The outer side wall of the upper frame body is provided with a lower friction piece which is in butt joint with the inner side wall of the lower frame body.

The inner side of the lower frame body is provided with an upper friction piece which is in contact with the outer side wall of the upper frame body, and the upper friction piece is positioned on the upper side of the lower friction piece.

The utility model has the advantages and positive effects that:

1. the utility model can integrally pull the armrest part to swing up and down to integrally lift or lower the armrest part by the parallelogram linkage mechanism formed by the armrest part, the middle connecting rod, the side connecting rod and the fixing frame, and can lower the armrest part to be lower than the height of the sitting surface of the wheelchair; even if the top of the side surface of the wheelchair is provided with the outer edge extending outwards, the handrail part can be folded to the lower side of the outer edge of the side surface of the wheelchair, the butt joint gap between the wheelchair and the bed is not affected, the wheelchair can be better attached to the bed, and the wheelchair is more convenient for patients to use during transferring.

2. According to the utility model, through the arrangement of the upper telescopic component and the lower telescopic component which are movably connected in a telescopic way, the telescopic height of the armrest part can be adjusted, so that different users can further adjust the armrest according to the needs, and the applicability is better.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present utility model;

FIG. 2 is a second schematic diagram of the overall structure of the present utility model;

FIG. 3 is a schematic structural view of the fixing frame of the present utility model;

FIG. 4 is a schematic view of the lower telescoping assembly of the present utility model in a disassembled configuration;

FIG. 5 is a schematic view of the upper telescoping assembly of the present utility model in a disassembled configuration;

FIG. 6 is a schematic view of the overall structure of the upper telescoping assembly of the present utility model;

FIG. 7 is a schematic diagram of an assembly structure of an upper telescoping assembly and a lower telescoping assembly according to the present utility model;

FIG. 8 is a schematic diagram of a usage status reference of the present utility model;

FIG. 9 is a second reference diagram of the usage status of the present utility model.

In the figure: 1 is a fixing frame, 11 is an inner U-shaped piece, 12 is an outer U-shaped piece and 13 is a fixing pin;

2 is a handrail part, 21 is an upper telescopic component, 2101 is an upper frame body, 21011 is a compression bar part, 21012 is a supporting tube part, 2102 is a pull rod, 2103 is a sliding pin, 2104 is a sliding block, 2105 is a fixing screw, 2106 is a cylindrical pin, 2107 is a spring, 2108 is a sliding block, 2109 is a sliding rail cover, 2110 is a lower friction piece, 2111 is an upper friction piece, 2112 is a hand-held handrail body, 22 is a lower telescopic component, 221 is a lower frame body, 22101 is an adjusting hole group, 22102 is a positioning hole group, 222 is a torsion spring, 223 is a torsion spring mounting pin shaft, and 224 is a locking hook;

3 is a middle connecting rod, 4 is a side connecting rod, and 5 is a nitrogen spring.

Detailed Description

The utility model is described in further detail below with reference to fig. 1-9.

The wheelchair lifting handrail comprises a fixing frame 1, a handrail part 2, a middle connecting rod 3 and a side connecting rod 4, wherein the fixing frame 1 is arranged on the side surface of the wheelchair. In this embodiment, the fixing frame 1 is connected to the side of the wheelchair by a conventional method, for example, by bolts.

The handrail part 2 is provided with a locking hook 224 through a torsion spring 222 and a torsion spring mounting pin 223, the handrail part 2 is respectively hinged with one end of the middle connecting rod 3 and one end of the side connecting rod 4, the other end of the middle connecting rod 3 and the other end of the side connecting rod 4 are respectively hinged with the fixing frame 1, the handrail part 2, the middle connecting rod 3, the side connecting rod 4 and the fixing frame 1 form a parallelogram connecting rod mechanism, and the upper end of the fixing frame 1 is provided with a fixing pin 13 matched with the locking hook 224. The armrest part 2 can be integrally pulled to swing up and down to enable the armrest part 2 to integrally rise or fall through the parallelogram linkage mechanism formed by the armrest part 2, the middle connecting rod 3, the side connecting rod 4 and the fixing frame 1, and the armrest part can be lowered to be lower than the height of the sitting surface of the wheelchair. By locking the locking hooks 224 with the fixing pins 13 under the force of the torsion springs 222, the armrest portion 2 as a whole can be maintained in the raised position. The existing wheelchair lifting armrests generally adopt a structure of lifting vertically upwards and downwards, can be blocked by the outwards extending outer edge of the top of the side surface of the wheelchair, and must be further arranged on the outer side of the outer edge of the side surface of the wheelchair, so that the butt joint gap with a bed is affected, and tight fit cannot be realized. As shown in figures 8 and 9, the wheelchair lifting handrail disclosed by the utility model adopts the parallelogram linkage mechanism to drive the handrail part 2 to move obliquely upwards and downwards, so that under the condition that the top of the wheelchair side surface is provided with the outwards extending outer edge, the fixing frame 1 can be arranged on the wheelchair side surface below the outer edge of the wheelchair side surface, the handrail part 2 is sent to the upper side of the outer edge of the wheelchair side surface from the obliquely upper side, and when the handrail part 2 is stored, the handrail part 2 can be completely received to the lower side of the outer edge of the wheelchair side surface from the obliquely lower side, the butt joint gap between the wheelchair and a bed is not influenced, the wheelchair lifting handrail can be better attached to the bed, and the wheelchair lifting handrail is more convenient for patients to use when being transferred.

Specifically, as shown in fig. 1 to 3, in this embodiment, a nitrogen spring 5 is further disposed between the intermediate link 3 and the fixing frame 1, and is used for playing a buffering role when the armrest portion 2 is pulled to swing up and down, so that the armrest portion 2 slowly and stably rises and falls, and the armrest portion 2 can be kept stable after falling. The nitrogen spring 5 is a commercially available product. In this embodiment, the fixing frame 1 is divided into an inner U-shaped part 11 and an outer U-shaped part 12 which are connected together, the inner U-shaped part 11 is fixedly connected to the inner side of the outer U-shaped part 12, the fixing pin 13 is installed at the upper end of the inner U-shaped part 11, the inner U-shaped part 11 is hinged to the middle connecting rod 3, the number of the side connecting rods 4 and the nitrogen springs 5 is two, the two nitrogen springs 5 are respectively arranged on two sides of the middle connecting rod 3, one end of each nitrogen spring 5 is hinged to the middle connecting rod 3, the other end of each nitrogen spring 5 is hinged to the outer U-shaped part 12, the two side connecting rods 4 are respectively arranged on two sides of the middle connecting rod 3, and the other end of each side connecting rod 4 is hinged to the outer U-shaped part 12.

Specifically, as shown in fig. 4 to 9, the armrest portion 2 in this embodiment includes an upper telescopic member 21 and a lower telescopic member 22. The lower telescopic assembly 22 comprises a lower frame 221, the inside of the lower frame 221 is hollow, a locking hook 224 is arranged at the lower end of the lower frame 221 through a torsion spring 222 and a torsion spring mounting pin 223, and the lower frame 221 is hinged with one end of the middle connecting rod 3 and one end of the side connecting rod 4 respectively. The upper telescopic assembly 21 comprises an upper frame body 2101 and a movable fixing structure, a hand-held handrail body 2112 is arranged at the upper end of the upper frame body 2101, the upper frame body 2101 penetrates through the lower frame body 221 and is connected with the lower frame body 221 through the movable fixing structure, and a compression bar portion 21011 for pressing the locking hook 224 is arranged at the lower end of the upper frame body 2101 in a downward extending mode. The height of the armrest part 2 can be adjusted by arranging the upper telescopic component 21 and the lower telescopic component 22 which are movably and telescopically connected. The hand grip body 2112 is for a user to directly hold the body.

Specifically, as shown in fig. 4-9, the movable fixing structure in this embodiment includes a pull rod 2102, a slide block 2108, a sliding pin 2103, and a sliding block 2104, wherein the upper end of the upper frame 2101 is provided with a support tube portion 21012 for mounting a hand-held armrest body 2112, a kidney-shaped hole is formed in the upper frame 2101 at the lower side of the support tube portion 21012, a handle portion is provided at the upper end of the pull rod 2102, two inclined guide grooves symmetrically arranged on the lower end of the pull rod 2102, the handle portion passes through the kidney-shaped hole, a cylindrical pin 2106 passing through the handle portion is provided at the lower side of the support tube portion 21012, a spring 2107 is sleeved on the cylindrical pin 2106 between the support tube portion 21012 and the handle portion of the pull rod 2102, the slide block 2108 is mounted on the upper frame 2101 at the lower side of the kidney-shaped hole, a slide is formed in the slide block 2108, two sliding blocks 2104 are slidingly connected in the slide, one sliding pin 2103 is respectively provided on each sliding block 2104, and each sliding pin 2103 is respectively inserted into one corresponding inclined guide groove. The support tube portion 21012 in this embodiment is connected to the hand grip body 2112 by a fixing screw 2105, and is easy to assemble and disassemble. In the embodiment, the handle part is T-shaped, so that the handle is convenient to pull by a user, and can be blocked at the outer side of the kidney-shaped hole to avoid falling. In this embodiment, the length direction of the kidney-shaped hole is parallel to the length direction of the upper frame 2101, and the length direction of the slideway is perpendicular to the length direction of the kidney-shaped hole, so that the pull rod 2102 can stably lift and the sliding block 2104 can be stably clamped.

When the spring 2107 presses the handle portion of the pull rod 2102 to move downward along the kidney-shaped hole, the pull rod 2102 presses each sliding pin 2103 through each inclined guide groove, so that the two sliding blocks 2104 slide to the outer side of the upper frame 2101 along the slideway and protrude from the upper frame 2101. When the handle portion of the pull rod 2102 is not pulled manually, the spring 2107 presses the handle portion of the pull rod 2102, so that the handle portion of the pull rod 2102 is located at the lowest point of the kidney-shaped hole. Cylindrical pin 2106 serves as a guide for the extension and retraction of spring 2107. When the handle portion of the pull rod 2102 is pulled to move upward along the kidney-shaped hole, the pull rod 2102 pulls each sliding pin 2103 through each inclined guide groove, so that the two sliding blocks 2104 slide along the slide ways to the inner side of the upper frame 2101 and are retracted to the inner side of the upper frame 2101.

Three adjusting hole groups 22101 matched with the two sliding blocks 2104 are sequentially formed in the upper end of the lower frame body 221 along the vertical direction, each adjusting hole group 22101 comprises two symmetrically arranged adjusting holes, the two sliding blocks 2104 are respectively inserted into the adjusting holes of the different adjusting hole groups 22101 to adjust the integral height position of the upper telescopic assembly 21, and the integral telescopic height of the armrest part 2 is convenient to adjust according to user requirements. The number of the adjustment hole groups 22101 can be increased or decreased according to the needs.

The lower frame 221 positioned at the lower side of the lowest adjusting hole group 22101 is provided with a positioning hole group 22102 matched with the two sliding blocks 2104, each positioning hole group 22102 comprises two symmetrically arranged positioning holes, and when the two sliding blocks 2104 are respectively inserted into the positioning holes of the positioning hole group 22102, the compression bar part 21011 contacts and presses the locking hook 224 to lift up, so that the locking hook 224 can be separated from the fixing pin 13.

Specifically, as shown in fig. 5, in this embodiment, the upper frame body 2101 is provided with a slide cover 2109 for covering the portion where the slide block 2108 is provided, so that the slide block 2108, the slide block 2104, the slide pin 2103 and the tie rod 2102 can be protected.

Specifically, as shown in fig. 5 and 7, in this embodiment, a lower friction member 2110 that contacts the inner wall of the lower frame 221 is provided on the outer wall of the upper frame 2101, an upper friction member 2111 that contacts the outer wall of the upper frame 2101 is provided on the inner side of the lower frame 221, and the upper friction member 2111 is located above the lower friction member 2110. Through the arrangement of the upper friction piece 2111 and the lower friction piece 2110, the outer side wall of the upper frame 2101 can be prevented from directly rubbing the inner side wall of the lower frame 221, the upper frame 2101 can stably lift, the upper friction piece 2111 can block the lower friction piece 2110, and the upper frame 2101 is prevented from being pulled out of the lower frame 221 during lifting. In this embodiment, the arrangement manner of the upper friction member 2111 and the lower friction member 2110 may be in the prior art, for example, the lower friction member 2110 is fixed on the outer side wall of the upper frame body 2101 by a fastening manner, the upper friction member 2111 is sleeved on the upper frame body 2101 before being assembled on the lower frame body 221, and after the lower side portion of the upper frame body 2101 penetrates into the lower frame body 221, the upper friction member 2111 is fixed with the lower frame body 221 by a screw.

In this embodiment, when the armrest portion 2 needs to be lowered, the pull rod 2102 is pulled upwards, the sliding blocks 2104 retract inwards, the hand-held armrest body 2112 is pressed downwards until the upper frame body 2101 is pressed to the bottommost position, at this time, the two sliding blocks 2104 are respectively inserted into the positioning holes of the positioning hole group 22102, the compression rod portion 21011 contacts and presses the locking hook 224 to tilt up, so that the locking hook 224 can be separated from the fixing pin 13, and then the armrest portion 2 is pulled to swing obliquely downwards to slowly descend to the bottommost position, so that one-time lowering is completed; when the armrest portion 2 needs to be lifted, the two sliding blocks 2104 are initially located in the positioning holes of the positioning hole group 22102 respectively, the locking hooks 224 are in a tilting state, after the armrest portion 2 is lifted to the highest position obliquely upwards, the pull rod 2102 is pulled upwards, the two sliding blocks 2104 slide inwards, at the moment, the armrest body 2112 is lifted by hand, the upper frame body 2101 moves upwards relative to the lower frame body 221, the pressure bar portion 21011 is gradually separated from the locking hooks 224, the locking hooks 224 move downwards under the action of the torsion springs 222 and are clamped on the fixing pins 13, lifting and fixing of the height position of the lower frame body 221 are completed, the upper frame body 2101 is pulled upwards continuously until the two sliding blocks 2104 are clamped into the proper adjusting holes of the adjusting hole group 22101 of the lower frame body 221, and then the pull rod 2102 is released, so that the upper frame body 2101 and the lower frame body 221 are kept fixed, and one-time lifting is completed.

Claims

1. The utility model provides a wheelchair lift handrail which characterized in that: the wheelchair comprises a fixing frame (1), a handrail part (2), a middle connecting rod (3) and a side connecting rod (4), wherein the fixing frame (1) is arranged on the side surface of the wheelchair;

the novel handrail is characterized in that a locking hook (224) is arranged on the handrail part (2) through a torsion spring (222) and a torsion spring mounting pin shaft (223), the handrail part (2) is hinged to one end of the middle connecting rod (3) and one end of the side connecting rod (4) respectively, the other end of the middle connecting rod (3) and the other end of the side connecting rod (4) are hinged to the fixing frame (1) respectively, the handrail part (2), the middle connecting rod (3), the side connecting rod (4) and the fixing frame (1) form a parallelogram connecting rod mechanism, and a fixing pin (13) matched with the locking hook (224) for use is arranged at the upper end of the fixing frame (1).

2. A wheelchair lifting armrest as claimed in claim 1, wherein: a nitrogen spring (5) is arranged between the middle connecting rod (3) and the fixing frame (1).

3. A wheelchair lifting armrest as claimed in claim 2, wherein: the fixing frame (1) is divided into an inner U-shaped piece (11) and an outer U-shaped piece (12) which are connected together, the inner U-shaped piece (11) is fixedly connected to the inner side of the outer U-shaped piece (12), the fixing pin (13) is installed at the upper end of the inner U-shaped piece (11), the inner U-shaped piece (11) is hinged to the middle connecting rod (3), the number of the side connecting rods (4) and the number of the nitrogen springs (5) are two, the two nitrogen springs (5) are respectively arranged on two sides of the middle connecting rod (3), one end of each nitrogen spring (5) is hinged to the middle connecting rod (3), the other end of each nitrogen spring is hinged to the outer U-shaped piece (12), the two side connecting rods (4) are respectively arranged on two sides of the middle connecting rod (3), and the other end of each side connecting rod (4) is hinged to the outer U-shaped piece (12).

4. A wheelchair lifting armrest as claimed in claim 1, wherein: the armrest part (2) comprises an upper telescopic component (21) and a lower telescopic component (22);

the lower telescopic assembly (22) comprises a lower frame body (221), the interior of the lower frame body (221) is hollow, the locking hook (224) is arranged at the lower end of the lower frame body (221) through a torsion spring (222) and a torsion spring mounting pin shaft (223), and the lower frame body (221) is hinged with one end of the middle connecting rod (3) and one end of the side connecting rod (4) respectively;

the upper telescopic assembly (21) comprises an upper frame body (2101) and a movable fixing structure, a hand-held handrail body (2112) is arranged at the upper end of the upper frame body (2101), the upper frame body (2101) is arranged in the lower frame body (221) in a penetrating mode and is connected with the lower frame body (221) through the movable fixing structure, and a compression rod portion (21011) for pressing the locking hook (224) is arranged at the lower end of the upper frame body (2101) in a downward extending mode.

5. The wheelchair lift arm of claim 4 wherein: the movable fixing structure comprises a pull rod (2102), a slide block (2108), sliding pins (2103) and sliding blocks (2104), wherein the upper end of an upper frame body (2101) is provided with a support tube portion (21012) for mounting a hand-held handrail body (2112), a waist-shaped hole is formed in the upper frame body (2101) at the lower side of the support tube portion (21012), the upper end of the pull rod (2102) is provided with a handle portion, the lower end of the pull rod is provided with two inclined guide grooves which are symmetrically arranged left and right, the handle portion penetrates through the waist-shaped hole, the lower side of the support tube portion (21012) is provided with a cylindrical pin (2106) penetrating through the handle portion, a spring (2107) is sleeved on the cylindrical pin (2106) between the support tube portion (21012) and the handle portion of the pull rod (2102), the slide block (2108) is mounted on the upper frame body (2101) at the lower side of the waist-shaped hole, the slide block (2108) is provided with two inclined guide grooves which are symmetrically arranged, and each sliding block (2103) is inserted into each sliding pin (2103);

when the spring (2107) presses the handle part of the pull rod (2102) to move downwards along the kidney-shaped hole, the pull rod (2102) respectively presses each sliding pin (2103) through each inclined guide groove, so that two sliding blocks (2104) respectively slide towards the outer side of the upper frame body (2101) along the sliding way and protrude out of the upper frame body (2101); when the handle part of the pull rod (2102) is pulled to move upwards along the kidney-shaped hole, the pull rod (2102) respectively pulls each sliding pin (2103) through each inclined guide groove, so that two sliding blocks (2104) respectively slide towards the inner side of the upper frame body (2101) along the slideway and are retracted into the inner side of the upper frame body (2101);

the upper end of the lower frame body (221) is provided with a plurality of adjusting hole groups (22101) which are matched with the two sliding blocks (2104) in the vertical direction, each adjusting hole group (22101) comprises two symmetrically arranged adjusting holes, and the two sliding blocks (2104) are respectively inserted into the adjusting holes of different adjusting hole groups (22101) to adjust the overall height position of the upper telescopic assembly (21);

the lower frame body (221) positioned at the lower side of the lowest adjusting hole group (22101) is provided with one positioning hole group (22102) matched with the two sliding blocks (2104), each positioning hole group (22102) comprises two symmetrically arranged positioning holes, and when the two sliding blocks (2104) are respectively inserted into the positioning holes of the positioning hole group (22102), the compression rod part (21011) contacts and presses the locking hooks (224) to tilt, so that the locking hooks (224) can be separated from the fixing pins (13).

6. A wheelchair lift arm as claimed in claim 5 wherein: the support tube portion (21012) is connected to the hand grip body (2112) by a set screw (2105).

7. A wheelchair lift arm as claimed in claim 5 wherein: the length direction of the kidney-shaped hole is parallel to the length direction of the upper frame body (2101), and the length direction of the slideway is perpendicular to the length direction of the kidney-shaped hole.

8. A wheelchair lift arm as claimed in claim 5 wherein: the upper frame body (2101) is provided with a slideway cover (2109) for covering the slideway block (2108).

9. A wheelchair lift arm as claimed in claim 5 wherein: the outer side wall of the upper frame body (2101) is provided with a lower friction piece (2110) which is in butt joint with the inner side wall of the lower frame body (221).

10. A wheelchair lifting armrest as claimed in claim 9, wherein: an upper friction piece (2111) which is in contact with the outer side wall of the upper frame body (2101) is arranged on the inner side of the lower frame body (221), and the upper friction piece (2111) is positioned on the upper side of the lower friction piece (2110).