CN218010194U - Air permeability enhancing device for wheelchair cushion - Google Patents

Abstract

The utility model discloses a gas permeability reinforcing apparatus of wheelchair cushion, including driving shaft, transmission, casing A and casing B, casing A's inside is provided with the fly leaf, permanent magnetic ring and adversion axle, and fly leaf slidable mounting is on casing A's inner wall, vacuole formation A between fly leaf and casing A's the roof, and cavity A's both sides are provided with blast pipe and breathing pipe respectively, the utility model discloses a be connected the tire of driving shaft and wheelchair, when rotating the tire, make the periodic rotation of the epaxial permanent magnetic ring of adversion, utilize the periodic volume that changes the cavity of upper and lower displacement of fly leaf, utilize the restriction of atmospheric pressure effect and check valve, make the bottom of cushion form the air flow, strengthen the air permeability of wheelchair cushion, overall structure is compact, small and exquisite, install the convenience additional, do not need extra power consumption, can effectively reduce the emergence of vexed sore, improve user's comfort level.

Description

Air permeability enhancing device for wheelchair cushion

Technical Field

The invention relates to the technical field of wheelchair cushions, in particular to a device for enhancing the air permeability of a wheelchair cushion.

Background

Wheelchairs and similar transportation tools are still key appliances which allow people to keep mobility in medical conditions of being injured or stopping walking of the people, and wheelchair cushions are also an important component of the wheelchairs and are key contact ends between the wheelchairs and users, but the existing wheelchair cushions are poor in air permeability when in use, and many wheelchair cushions only consider the air permeability around the buttocks of patients;

for example, chinese patent with publication number CN110973892A discloses an active carbon sweat-absorbing odor-removing cushion, which comprises a cushion body, wherein a groove is formed in the middle of the top of the cushion body, the active carbon sweat-absorbing odor-removing cushion is provided with a cavity, a spring, an active carbon layer, an elastic net, a sterilization layer, a through hole, a dustproof net and a stop block, when a disabled person uses the cushion and sits in the groove, the groove can be extruded and deformed through the elastic net and the spring, and air in the cavity is extruded through the through hole after the cavity is deformed, so that the air flows to dissipate heat generated by the buttocks of the disabled person;

CN201920823703 discloses a breathable cushion for an intelligent wheelchair, which is characterized in that through the arrangement of an elastic mesh, an air exhaust fan, an exhaust pipe, a storage battery, a frequency converter and a control switch, when the breathable cushion is used, a motor in the air exhaust fan is operated to drive fan blades to rotate to extract sultry air at the lower part of the elastic mesh, and the sultry air is discharged to the lower part of the wheelchair through the exhaust pipe, so that the sultry air is prevented from accumulating to cause sultry sensation at the hip of a user, the use comfort of the wheelchair is improved, and the problem that the sultry sensation and the dampness sensation are generated by the user when sitting in hot summer or in hot weather for a long time is solved;

to sum up, prior art improves the gas permeability of wheelchair cushion, the improvement of cushion itself material or install extra electronic wind power equipment additional for the multi-body, electronic wind power equipment leads to simple structure's wheelchair to become complicated, brought the safety problem, waterproof problem, other unfavorable factors such as power consumption problem, be unfavorable for injured crowd's use, though can play certain effect to the improvement of cushion itself material, but the reinforcing degree of gas permeability is not enough, often still need user's buttock horizontal hunting just can reach the use purpose, the pertinence is not strong, the effort is weak.

Disclosure of Invention

The present invention is directed to a device for enhancing the air permeability of a wheelchair cushion, which solves the above-mentioned problems of the prior art.

The utility model provides a gas permeability reinforcing means of wheelchair cushion, includes driving shaft, transmission, casing A and casing B, casing A's inside is provided with fly leaf, permanent magnetism circle and adversion, the both ends of interior pivot are passed through the inner wall rotation of bearing and casing A and are connected, fly leaf and permanent magnetism circle are made by magnetic material, permanent magnetism circle fixed cover is established in the pivot including, and permanent magnetism circle comprises unanimous and the opposite magnet A of magnetism of specification and magnet B, fly leaf slidable mounting forms cavity A between fly leaf and casing A's the roof, and cavity A's both sides are provided with blast pipe and breathing pipe respectively, casing B rigid coupling is on casing A's lateral wall, is provided with cavity B in the casing B, communicates each other through the breathing pipe between cavity B and the cavity A, a plurality of bleeder vents have still been seted up on casing B's the roof.

Preferably, the transmission device comprises a driving wheel, a driven shaft, a synchronous belt and a driven wheel, the driving wheel and the driven wheel are fixedly sleeved on the driving shaft and the driven shaft respectively, the driving wheel and the driven wheel are synchronously connected through the synchronous belt, and one end of the inner rotating shaft penetrates out of the shell A and is fixedly connected with one end of the driven shaft through a coupling.

Preferably, the outer diameter of the driving wheel is twice of the outer diameter of the driven wheel.

Preferably, a one-way valve A is arranged in the exhaust pipe, and the one-way valve A only allows gas to be exhausted from the cavity A.

Preferably, a one-way valve B is arranged in the air suction pipe, and the one-way valve B only allows air to enter the cavity a from the cavity B.

Preferably, the outer side walls of the shell A and the shell B are further fixedly connected with a fixing piece.

Compared with the prior art, the invention has the following beneficial effects: according to the invention, the driving shaft is connected with the tire of the wheelchair, when the tire is rotated, the permanent magnet ring on the inner rotating shaft periodically rotates, the volume of the cavity A is periodically changed by utilizing the vertical displacement of the movable plate, and the air flow is formed at the bottom of the cushion by utilizing the air pressure action and the limitation of the one-way valve, so that the ventilation capacity of the wheelchair cushion is enhanced.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention without limiting the invention in which:

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

In the figure: 1. a drive shaft; 2. a driving wheel; 3. a transmission device; 4. a driven shaft; 5. a synchronous belt; 6. a driven wheel; 7. a fixing member; 8. an exhaust pipe; 9. a shell A; 10. a cavity A; 11. an air suction pipe; 12. a housing B; 13. air holes are formed; 14. a magnet A; 15. a movable plate; 16. a cavity B; 17. a permanent magnet ring; 18. a magnet B; 19. an inner rotating shaft; 20. and a bearing.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative efforts based on the embodiments of the present invention belong to the protection scope of the present invention.

Referring to fig. 1, the present invention provides a technical solution:

a ventilation enhancing device for a wheelchair cushion comprises a driving shaft 1, a transmission device 3, a shell A9 and a shell B12, wherein a movable plate 15, a permanent magnet ring 17 and an inner rotating shaft 19 are arranged inside the shell A9, two ends of the inner rotating shaft 19 are rotatably connected with the inner wall of the shell A9 through a bearing 20, the movable plate 15 and the permanent magnet ring 17 are both made of magnetic materials, the permanent magnet ring 17 is fixedly sleeved on the inner rotating shaft 19, the permanent magnet ring 17 is composed of a magnet A14 and a magnet B18 which are consistent in specification and opposite in magnetism, the bottom magnetic poles of the magnet A14 and the movable plate 15 are opposite and are in an attraction state, and the bottom magnetic poles of the magnet B18 and the movable plate 15 are the same and are in a mutual exclusion state;

the movable plate 15 is slidably mounted on the inner wall of the shell A9, a cavity A10 is formed between the movable plate 15 and the top wall of the shell A9, an exhaust pipe 8 and an air suction pipe 11 are respectively arranged on two sides of the cavity A10, the shell B12 is fixedly connected to the side wall of the shell A9, a plurality of air vents 13 are formed in the top wall of the shell B12, a cavity B16 is arranged in the shell B12, the cavity B16 and the cavity A10 are mutually communicated through the air suction pipe 11, a one-way valve A is arranged in the exhaust pipe 8, the one-way valve A only allows air to be exhausted from the cavity A10, a one-way valve B is arranged in the air suction pipe 11, and the one-way valve B only allows air to enter the cavity A10 from the cavity B16;

the transmission device 3 comprises a driving wheel 2, a driven shaft 4, a synchronous belt 5 and a driven wheel 6, the driving wheel 2 and the driven wheel 6 are respectively fixedly sleeved on the driving shaft 1 and the driven shaft 4, the driving wheel 2 and the driven wheel 6 are synchronously connected through the synchronous belt 5, one end of an inner rotating shaft 19 penetrates out of a shell A9 and is fixedly connected with one end of the driven shaft 4 through a coupling, the outer diameter of the driving wheel 2 is two times or more than that of the driven wheel 6, a fixing part 7 is further fixedly connected to the outer side walls of the shell A9 and the shell B12, and the shell A9 and the shell B12 are conveniently and fixedly installed at the bottom of the wheelchair cushion.

The working principle of the invention is as follows: fixedly connecting a driving shaft 1 with a central shaft of a wheelchair tire, enabling the driving shaft 1 to synchronously rotate along with the rotation of the tire, and fixedly mounting a shell A9 and a shell B12 at the bottom of a wheelchair cushion through a fixing part 7, wherein the shell B12 is more flat and long than the example structure in the figure 1 in actual production so as to increase the ventilation area;

when a user rotates a tire, the driving shaft 1 starts to follow up rotation, the driving shaft drives the inner rotating shaft 19 to rotate through the transmission device 3, the permanent magnet ring 17 on the inner rotating shaft 19 starts to periodically rotate, when the magnet A14 rotates to the upper side, the magnet A14 and the movable plate 15 are mutually adsorbed, the movable plate 15 moves downwards, the size of the cavity A10 is increased and is limited by air pressure and a one-way valve, external air sequentially passes through the air holes 13 and the air suction pipe 11 to enter the cavity A10 and takes away moisture and heat of the hip of the user, when the magnet B18 rotates to the upper side, the magnet B18 and the movable plate 15 repel each other, the movable plate 15 moves upwards, the size of the cavity A10 is reduced, the air in the cavity A10 is pressed out of the exhaust pipe 8 in a circulating mode, air flowing is formed, the air permeability of a wheelchair cushion is enhanced, the comfort level of the user is improved, and the occurrence of sore is reduced.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.

Claims (6)

1. The utility model provides a gas permeability reinforcing apparatus of wheelchair cushion, includes driving shaft (1), transmission (3), casing A (9) and casing B (12), its characterized in that: the air conditioner is characterized in that a movable plate (15), a permanent magnet ring (17) and an inner rotating shaft (19) are arranged inside the shell A (9), two ends of the inner rotating shaft (19) are rotatably connected with the inner wall of the shell A (9) through bearings (20), the movable plate (15) and the permanent magnet ring (17) are made of magnetic materials, the permanent magnet ring (17) is fixedly sleeved on the inner rotating shaft (19), the permanent magnet ring (17) is composed of a magnet A (14) and a magnet B (18) which are consistent in specification and opposite in magnetism, the movable plate (15) is slidably mounted on the inner wall of the shell A (9), a cavity A (10) is formed between the movable plate (15) and the top wall of the shell A (9), an exhaust pipe (8) and an air suction pipe (11) are respectively arranged on two sides of the cavity A (10), the shell B (12) is fixedly connected to the side wall of the shell A (9), a cavity B (16) is arranged in the shell B (12), the cavity B (16) is communicated with the cavity A (10) through the air suction pipe (11), and a plurality of air holes (13) are further formed in the shell B (12).

2. The apparatus for enhancing air permeability of a wheelchair cushion as claimed in claim 1, wherein: drive arrangement (3) include action wheel (2), driven shaft (4), hold-in range (5) and follow driving wheel (6), and action wheel (2) and follow driving wheel (6) fixed cover respectively establish on driving shaft (1) and driven shaft (4), through hold-in range (5) synchronous connection between action wheel (2) and the driven driving wheel (6), the one end rigid coupling of shell A (9) outer and through shaft joint and driven shaft (4) is worn out to the one end of interior pivot (19).

3. The apparatus for enhancing air permeability of a wheelchair cushion as claimed in claim 2, wherein: the outer diameter of the driving wheel (2) is twice of the outer diameter of the driven wheel (6).

4. The apparatus for enhancing air permeability of a wheelchair cushion as claimed in claim 1, wherein: a check valve A is arranged in the exhaust pipe (8), and the check valve A only allows gas to be exhausted from the cavity A (10).

5. The apparatus for enhancing air permeability of a wheelchair cushion as claimed in claim 1, wherein: a check valve B is arranged in the air suction pipe (11), and only allows air to enter the cavity A (10) from the cavity B (16).

6. The apparatus for enhancing air permeability of a wheelchair cushion as claimed in claim 1, wherein: and the outer side walls of the shell A (9) and the shell B (12) are also fixedly connected with a fixing piece (7).

Images