Liftable wheelchair armrest assembly

Abstract

The utility model relates to the technical field of wheelchair armrests, in particular to a liftable wheelchair armrest assembly which comprises a long armrest, the lower end face of the long armrest is connected with an armrest pipe, one side of the lower end face of the armrest pipe is connected with a vertically-arranged front inner sliding pipe, the lower portion of the front inner sliding pipe is sleeved with a front outer sliding pipe, and an adjusting piece is arranged on the front outer sliding pipe. The adjusting part comprises an adjusting sleeve connected with the front outer sliding pipe, a penetrating hole communicated with the front outer sliding pipe is formed in the adjusting sleeve, an adjusting bolt penetrating through the penetrating hole is arranged in the adjusting sleeve in a sliding fit mode, a spring arranged on the outer side of the adjusting bolt in a sleeving mode is arranged in the penetrating hole, and the two ends of the spring are connected with the adjusting bolt and the adjusting sleeve respectively. One end of the adjusting bolt extends into the front outer sliding pipe, a limiting hole matched with the adjusting bolt is formed in the side wall of the front inner sliding pipe, the other end of the adjusting bolt is connected with a clamping block, and a clamping groove clamped with the clamping block in a matched mode is formed in the side, away from the front outer sliding pipe, of the adjusting sleeve. The utility model is more convenient to use.

Description

Technical Field

[0001] The utility model relates to the technical field of wheelchair armrests, in particular to a liftable wheelchair armrest assembly. Background Art

[0002] In order to facilitate the use of different groups of people, the armrests on existing wheelchairs are designed to be adjustable in height.

[0003] For example, a patent with publication number CN210170324U, entitled A height adjustment device for a wheelchair armrest, was disclosed on March 24, 2020. The device includes a side guard plate and an armrest plate arranged on the top of the side guard plate. The side guard plate is provided with a socket matching the vertical plate, and a plurality of positioning grooves are provided on the inner wall of one side of the socket. The vertical plate is slidably connected in the socket, and a limit rod is provided inside the vertical plate. The middle part of the limit rod is hinged to the vertical plate, and the bottom can extend out of the first through hole and abut against the positioning groove. Press the button to make the limit block slide out of the positioning groove, and then lift up or press down the armrest plate to achieve the height adjustment of the armrest; however, the applicant found that when adjustment is needed, the button needs to be kept pressed for a long time, which is inconvenient to use. Summary of the invention

[0004] In view of this, the purpose of the present invention is to provide a liftable wheelchair armrest assembly to solve the problem of inconvenience in use.

[0005] Based on the above purpose, the utility model provides a liftable wheelchair armrest assembly, comprising a long armrest, a handrail tube is connected to the lower end surface of the long armrest, a front inner sliding tube is connected to one side of the lower end surface of the handrail tube, a front outer sliding tube is sleeved under the front inner sliding tube, and an adjusting piece is arranged on the front outer sliding tube; the adjusting piece comprises an adjusting sleeve connected to the front outer sliding tube, a through hole communicating with the front outer sliding tube is opened on the adjusting sleeve, an adjusting pin penetrating the through hole is slidably arranged in the adjusting sleeve, a spring sleeved on the outside of the adjusting pin is arranged in the through hole, two ends of the spring are respectively connected with the adjusting pin and the adjusting sleeve, one end of the adjusting pin extends into the front outer sliding tube, a plurality of limiting holes arranged in a row and cooperating with the adjusting pin are arranged on the side wall of the front inner sliding tube, a clamping block is connected to the other end of the adjusting pin, a clamping groove cooperating with the clamping block is opened on the side of the adjusting sleeve away from the front outer sliding tube, and the clamping block is connected to a knob.

[0006] Optionally, a slot for accommodating the spring is provided in the through hole, one end of the adjusting pin is connected to a clamping head that cooperates with the limiting hole, the diameter of the clamping head is larger than the diameter of the adjusting pin, and the two ends of the spring are respectively contacted and connected with the adjusting pin and the adjusting sleeve, one end of the spring is contacted with the clamping head on the adjusting pin, and the other end of the spring is contacted with the slotted side wall in the adjusting sleeve.

[0007] Optionally, a thread is provided on the side wall at the other end of the adjusting pin, and screw holes cooperating with the thread are provided on the block and the knob, and an assembly hole coaxially arranged with the through hole is provided on the front outer sliding tube, and the aperture of the assembly hole is larger than the diameter of the clamping head connected to the end of the adjusting pin.

[0008] Optionally, the long handrail is arranged at an angle, and the height of one side of the long handrail close to the front inner sliding tube is higher than the height of the other side of the long handrail.

[0009] Optionally, the long armrest includes an armrest base shell connected to the armrest tube, the armrest tube and the armrest base shell are detachably connected via fasteners, and an armrest pad group is clipped onto the armrest base shell.

[0010] Optionally, a rear inner sliding tube parallel to the front inner sliding tube is connected to the other side of the lower end surface of the handrail tube, and a rear outer sliding tube parallel to the front outer sliding tube is sleeved under the rear inner sliding tube.

[0011] Optionally, both ends of the handrail tube, the lower end of the rear outer sliding tube and the lower end of the front outer sliding tube are provided with pipe plugs.

[0012] Optionally, a guard plate is connected between the rear outer sliding tube and the front outer sliding tube.

[0013] Optionally, a slide groove is vertically provided on the inner side wall of the rear outer slide tube, and a slide bar cooperating with the slide groove is fixedly provided on the outer side wall of the rear inner slide tube.

[0014] The beneficial effects of the utility model: the utility model provides a liftable wheelchair armrest assembly. When the height of the long armrest needs to be adjusted, the knob and the block are pulled, and then the adjusting pin is pulled, so that one end of the adjusting pin moves from the limiting hole to the adjusting sleeve, and at the same time the block is free from the restriction of the slot. Then the knob is turned so that the end of the adjusting sleeve with the slot is abutted against the block. At this time, there is no need for a person to keep pulling the knob for a long time. Since the adjusting pin is not inserted into the limiting hole, a person can move the front inner slide tube to adjust the height of the long armrest. After moving to the appropriate height, the knob is turned so that the block corresponds to the slot. Under the elastic pulling force of the spring, the block moves toward the front outer slide tube and is inserted into the slot. At this time, the adjusting pin is inserted into the limiting hole, which is more convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 It is a structural schematic diagram of an exploded view of the utility model;

[0018] Figure 3 It is a structural schematic diagram of the second exploded view of the utility model;

[0019] Figure 4 It is a structural schematic diagram of the adjusting member of the utility model;

[0020] Figure 5 It is a schematic diagram of the internal structure of the adjusting member of the utility model.

[0021] In the figure: 1. rear outer sliding tube; 2. front outer sliding tube; 3. guard plate; 4. front inner sliding tube; 5. rear inner sliding tube; 6. armrest tube; 7. long armrest; 8. armrest bottom shell; 9. armrest pad assembly; 10. adjustment pin; 11. spring; 12. adjustment sleeve; 13. clamping block; 14. knob; 15. clamping slot; 16. limiting hole; 17. assembly hole. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0023] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0024] like Figures 1 to 5 As shown, a liftable wheelchair armrest assembly comprises a long armrest 7, the lower end face of the long armrest 7 is connected to an armrest tube 6, one side of the lower end face of the armrest tube 6 is vertically connected to a front inner slide tube 4, a front outer slide tube 2 is sleeved under the front inner slide tube 4, and an adjusting member is arranged on the front outer slide tube 2; the adjusting member comprises an adjusting sleeve 12 connected to the front outer slide tube 2, a through hole communicating with the front outer slide tube 2 is opened on the adjusting sleeve 12, an adjusting pin 10 penetrating the through hole is slidably arranged in the adjusting sleeve 12, and a sleeve is arranged in the through hole. The spring 11 on the outside of the adjusting pin 10 has two ends respectively connected to the adjusting pin 10 and the adjusting sleeve 12. One end of the adjusting pin 10 extends into the front outer slide tube 2. The side wall of the front inner slide tube 4 is provided with a plurality of limiting holes 16 arranged in a row and matched with the adjusting pin 10. The other end of the adjusting pin 10 is connected with a clamping block 13. The side of the adjusting sleeve 12 away from the front outer slide tube 2 is provided with a clamping groove 15 matched with the clamping block 13. The clamping block 13 is connected with a knob 14.

[0025] When the height of the long handrail 7 needs to be adjusted, the knob 14 and the block 13 are pulled, and then the adjusting pin 10 is pulled, so that one end of the adjusting pin 10 moves from the limiting hole 16 to the adjusting sleeve 12, and the block 13 is free from the restriction of the slot 15, and then the knob 14 is turned so that the end of the adjusting sleeve 12 with the slot 15 abuts against the block 13. At this time, there is no need for people to keep pulling the knob 14 for a long time. Since the adjusting pin 10 is not inserted into the limiting hole 16, people can move the front inner slide tube 4 to adjust the height of the long handrail 7. After moving to the appropriate height, the knob 14 is turned so that the block 13 corresponds to the slot 15. Under the elastic pulling force of the spring 11, the block 13 moves toward the direction of the front outer slide tube 2 and is inserted into the slot 15. At this time, the adjusting pin 10 is inserted into the limiting hole 16, which is more convenient to use.

[0026] A limiting groove cooperating with the blocking block 13 is provided on one side of the adjusting sleeve 12 where the card slot 15 is provided, and the limiting groove is connected to the through hole, and the groove depth of the limiting groove is lower than the groove depth of the card slot 15. The setting of the limiting groove facilitates the restriction of the blocking block 13 when one end of the adjusting pin 10 moves from the limiting hole 16 into the adjusting sleeve 12, thereby preventing the blocking block 13 from rotating when the front inner slide tube 4 is not moved to a suitable height, causing the adjusting pin 10 to be inserted into the limiting hole 16 and affecting the movement of the front inner slide tube 4, thereby affecting the height adjustment of the long armrest 7.

[0027] A slot for accommodating the spring 11 is provided in the through hole, and one end of the adjusting pin 10 is connected to a clamping head that is arranged in cooperation with the limiting hole 16, and the diameter of the clamping head is larger than the diameter of the adjusting pin 10. The two ends of the spring 11 are respectively in contact with the adjusting pin 10 and the adjusting sleeve 12, and one end of the spring 11 is in contact with the clamping head on the adjusting pin 10, and the other end of the spring 11 is in contact with the slotted side wall in the adjusting sleeve 12, so that the two ends of the spring 11 do not need to be fixedly connected with the adjusting pin 10 and the adjusting sleeve 12, and can be confined in the adjusting sleeve 12.

[0028] A thread is provided on the side wall at the other end of the adjusting pin 10, and screw holes cooperating with the thread are provided on the block 13 and the knob 14, so that the block 13 and the knob 14 can be detachably assembled with the adjusting pin 10, and an assembly hole 17 coaxially arranged with the through hole is provided on the front outer sliding tube 2, and the aperture of the assembly hole 17 is larger than the diameter of the clamping head connected to the end of the adjusting pin 10. The arrangement of the assembly hole 17 facilitates the adjusting pin 10 to extend into the adjusting sleeve 12 through the assembly hole 17, and then facilitates the installation of the adjusting pin 10, the block 13 and the knob 14.

[0029] The long armrest 7 is arranged at an angle, and the height of one side of the long armrest 7 close to the front inner sliding tube 4 is higher than the height of the other side of the long armrest 7 . The arrangement of the long armrest 7 facilitates improving the comfort of placing the hand on the long armrest 7 .

[0030] The long armrest 7 includes an armrest base shell 8 connected to the armrest tube 6. The armrest tube 6 and the armrest base shell 8 are detachably connected via fasteners. The fasteners include bolts and nuts matched therewith. An armrest pad group 9 is clipped onto the armrest base shell 8. The long armrest 7 includes the armrest pad group 9 and the armrest base shell 8 to facilitate the disassembly and assembly of the long armrest 7.

[0031] Both ends of the handrail tube 6, the lower end of the rear outer sliding tube 1 and the lower end of the front outer sliding tube 2 are provided with pipe plugs for sealing the handrail tube 6, the rear outer sliding tube 1 and the front outer sliding tube 2 to prevent impurities from entering the handrail tube 6, the rear outer sliding tube 1 and the front outer sliding tube 2, and also to facilitate elastic buffering.

[0032] A rear inner slide tube 5 parallel to the front inner slide tube 4 is connected to the other side of the lower end surface of the handrail tube 6, and a rear outer slide tube 1 parallel to the front outer slide tube 2 is sleeved under the rear inner slide tube 5. The length and inner diameter of the front inner slide tube 4 are set to be the same as the length and inner diameter of the rear inner slide tube 5, and the length and inner diameter of the front outer slide tube 2 are set to be the same as the length and inner diameter of the rear outer slide tube 1. The support of the handrail tube 6 by the front inner slide tube 4 and the rear inner slide tube 5 improves the stability of the long handrail 7 on the handrail tube 6.

[0033] A guard plate 3 is connected between the rear outer sliding tube 1 and the front outer sliding tube 2 to facilitate the connection between the rear outer sliding tube 1 and the front outer sliding tube 2, thereby reinforcing the wheelchair armrest assembly.

[0034] The inner wall of the rear outer slide tube 1 is vertically provided with a slide groove, and the outer wall of the rear inner slide tube 5 is fixedly provided with a slide bar that cooperates with the slide groove to prevent the rear outer slide tube 1 and the rear inner slide tube 5 from rotating, thereby affecting the use of the wheelchair armrest assembly. In addition, it also restricts the front outer slide tube 2 and the front inner slide tube 4, reducing the possibility of the adjustment pin 10 and the limiting hole 16 not being able to cooperate.

[0035] A person skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention is limited to these examples. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0036] The embodiments of the present invention are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A liftable wheelchair armrest assembly, comprising a long armrest (7), characterized in that: The lower end surface of the long handrail (7) is connected to a handrail tube (6), and one side of the lower end surface of the handrail tube (6) is connected to a front inner slide tube (4), and a front outer slide tube (2) is sleeved under the front inner slide tube (4), and an adjusting member is arranged on the front outer slide tube (2); the adjusting member comprises an adjusting sleeve (12) connected to the front outer slide tube (2), and a through hole communicating with the front outer slide tube (2) is opened on the adjusting sleeve (12), and an adjusting pin (10) penetrating the through hole is slidably arranged in the adjusting sleeve (12), and a spring (10) sleeved on the outside of the adjusting pin (10) is arranged in the through hole. 1), the two ends of the spring (11) are respectively connected to the adjusting pin (10) and the adjusting sleeve (12), one end of the adjusting pin (10) is inserted into the front outer slide tube (2), a plurality of limiting holes (16) arranged in a row and matched with the adjusting pin (10) are arranged on the side wall of the front inner slide tube (4), the other end of the adjusting pin (10) is connected to a clamping block (13), a clamping groove (15) matched with the clamping block (13) is provided on the side of the adjusting sleeve (12) away from the front outer slide tube (2), and the clamping block (13) is connected to a knob (14).

2. The liftable wheelchair armrest assembly according to claim 1, characterized in that: A slot for accommodating the spring (11) is provided in the through hole, one end of the adjusting pin (10) is connected to a clamping head matched with the limiting hole (16), the diameter of the clamping head is larger than the diameter of the adjusting pin (10), one end of the spring (11) is in contact with the clamping head on the adjusting pin (10), and the other end of the spring (11) is in contact with the side wall of the slot in the adjusting sleeve (12).

3. The liftable wheelchair armrest assembly according to claim 2, characterized in that: The side wall at the other end of the adjusting pin (10) is provided with a thread, the clamping block (13) and the knob (14) are provided with a screw hole matched with the thread, the front outer sliding tube (2) is provided with an assembly hole (17) coaxially arranged with the through hole, and the diameter of the assembly hole (17) is larger than the diameter of the clamping head connected to the end of the adjusting pin (10).

4. The liftable wheelchair armrest assembly according to claim 1, characterized in that: The long handrail (7) is arranged obliquely, and the height of the side of the long handrail (7) close to the front inner sliding tube (4) is higher than the height of the other side of the long handrail (7).

5. A liftable wheelchair armrest assembly according to claim 1 or 4, characterized in that: The long handrail (7) comprises an handrail base shell (8) connected to the handrail tube (6); the handrail tube (6) and the handrail base shell (8) are detachably connected via fasteners; and an handrail pad assembly (9) is cooperatingly snap-fitted onto the handrail base shell (8).

6. The liftable wheelchair armrest assembly according to claim 1, characterized in that: The other side of the lower end surface of the handrail tube (6) is connected to a rear inner sliding tube (5) parallel to the front inner sliding tube (4), and a rear outer sliding tube (1) parallel to the front outer sliding tube (2) is sleeved under the rear inner sliding tube (5).

7. The liftable wheelchair armrest assembly according to claim 6, characterized in that: Both ends of the handrail tube (6), the lower end of the rear outer sliding tube (1) and the lower end of the front outer sliding tube (2) are provided with tube plugs.

8. The liftable wheelchair armrest assembly according to claim 6, characterized in that: A guard plate (3) is connected between the rear outer sliding tube (1) and the front outer sliding tube (2).

9. The liftable wheelchair armrest assembly according to claim 6, characterized in that: The inner side wall of the rear outer sliding tube (1) is vertically provided with a sliding groove, and the outer side wall of the rear inner sliding tube (5) is fixedly provided with a sliding strip that cooperates with the sliding groove.

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