CN218030490U - Aerating device and aerify precious - Google Patents

Abstract

The utility model discloses an aerating device and aerify precious, aerating device includes the supporting seat, a plurality of cylinders and drive arrangement, each in a plurality of cylinders all includes cylinder and the piston of slidable ground cooperation in the cylinder, the cylinder is installed in the supporting seat and is equipped with the gas vent, the piston has the first critical position of neighbouring gas vent and keeps away from the critical position of second of gas vent, drive arrangement installs in the supporting seat, drive arrangement links to each other with each in a plurality of pistons, when one of them piston is located first critical position, at least one piston is located the critical position of second. The utility model provides an aerating device has the gas velocity fast, and is efficient, advantage that energy utilization is high.

Description

Aerating device and aerify precious

Technical Field

The utility model relates to an inflation equipment technical field, concretely relates to aerating device and aerify precious.

Background

In the related art, the portable inflating device usually inflates air for a single air cylinder, namely, the inflating effect is realized by means of reciprocating motion of a single piston in a cylinder barrel, and the piston slides in an idle stroke when air is supplied into the cylinder barrel, so that the defects of low inflating speed, low efficiency and low energy utilization rate exist.

Disclosure of Invention

The present invention is directed to solving, at least to some extent, one of the technical problems in the related art.

Therefore, the embodiment of the invention provides an inflation device and an inflation treasure.

The air charging device comprises a supporting seat, a plurality of air cylinders and a driving device, wherein each air cylinder comprises a cylinder barrel and a piston which is matched in the cylinder barrel in a sliding mode, the cylinder barrel is installed on the supporting seat and is provided with an air outlet, and the piston is provided with a first critical position adjacent to the air outlet and a second critical position far away from the air outlet; the driving device is arranged on the supporting seat and connected with each of the plurality of pistons, and when one of the pistons is located at the first critical position, at least one of the pistons is located at the second critical position.

According to the utility model discloses aerating device, start drive arrangement, a plurality of pistons of drive arrangement drive slide in the cylinder in step, can understand, when one of them piston was slided to the second critical position by first critical position, at least one piston slided to first critical position by the second critical position, therefore, the gliding effect in turn of piston in two at least cylinders has been realized, one of them cylinder is when the tonifying qi promptly, another cylinder is exhausting, continuous gas filled effect has been realized, the inflating speed has been improved and the efficiency of aerifing has been improved, energy utilization has been promoted.

Therefore, the inflation device has the advantages of high inflation speed, high efficiency and high energy utilization rate.

In some embodiments, the number of the cylinders is two, and the sliding directions of the pistons in the two cylinders are consistent.

In some embodiments, the inflation device further comprises a rotating member and a connecting member, the rotating member is pivotally connected with the supporting seat, and the driving device is connected with the rotating member so as to drive the rotating member to rotate; the connecting pieces are the same in number and correspond to the cylinders one to one, the first ends of the connecting pieces are hinged to the pistons in the corresponding cylinders, the second ends of the connecting pieces are connected with the rotating pieces in a pivoting mode, the two connecting pieces are opposite to the rotating pieces, the pivoting axes of the rotating pieces are opposite to the pivoting axes of the supporting seats, the two connecting pieces are coplanar, and the pivoting axes of the rotating pieces are opposite to the supporting seats.

In some embodiments, the inflator further comprises connecting shafts, the number of the rotating members is equal to that of the cylinders, the rotating members correspond to the cylinders one by one, the two rotating members are connected with two ends of the connecting shafts respectively, the two rotating members are pivotally connected with the supporting base through the connecting shafts, and second ends of the two connecting members are pivotally connected with the two rotating members respectively.

In some embodiments, the rotating member comprises a turntable or a crank.

In some embodiments, the driving device comprises a motor, a first bevel gear and a second bevel gear, and the motor is mounted on the supporting seat; the first bevel gear is coaxially connected with a motor shaft of the motor; the second bevel gear is coaxially connected with the connecting shaft and meshed with the first bevel gear.

In some embodiments, the motor is a brushless motor or a brushed motor.

In some embodiments, the inflator further includes a battery assembly electrically connected to the driving device, and the battery assembly is aligned with the support seat in the sliding direction of the piston.

In some embodiments, the battery assembly includes a battery compartment and a plurality of batteries, the battery compartment has a containing cavity, and the plurality of batteries are installed in the containing cavity and are sequentially arranged along the circumferential direction of the containing cavity.

In some embodiments, the cross-sectional shape of the receiving cavity is triangular, and the number of the batteries is three;

or the cross section of the accommodating cavity is quadrilateral, and the number of the batteries is four.

In some embodiments, the inflator further includes a plurality of exhaust check valves, the number of the exhaust check valves is equal to that of the cylinders, and the exhaust check valves correspond to the cylinders one by one, and the exhaust check valves are connected to the corresponding cylinder barrels and close the exhaust ports.

In some embodiments, the cylinder barrel is provided with an air supply one-way valve, or the piston is sleeved with a leather cup.

According to the utility model discloses aerify precious, including the shell with as above-mentioned any embodiment's aerating device, aerating device install in the shell.

According to the utility model discloses aerify precious, the shell is used for avoiding aerating device to expose to aerating device protection, reduces the burden that the clearance was maintained, reduces the risk of damage. In addition, according to the utility model discloses other technical advantages of precious with the aerating device of above-mentioned embodiment of aerifing are the same, and will not be repeated here.

In some embodiments, the housing is provided with heat dissipation holes.

Drawings

Fig. 1 is an exploded view of an inflatable device according to an embodiment of the present invention.

Fig. 2 is an exploded view of an inflator according to an embodiment of the present invention.

Fig. 3 is a top view of an inflator according to an embodiment of the present invention.

Reference numerals: 1. a supporting seat; 101. a support plate; 102. mounting a plate; 2. a cylinder; 201. a cylinder barrel; 3. a drive device; 301. a motor; 302. a first bevel gear; 303. a second bevel gear; 4. a rotating member; 401. a turntable; 5. a connecting member; 6. a connecting shaft; 7. a battery assembly; 701. a battery compartment; 8. an exhaust check valve; 9. a gas guide valve; 10. a seal ring; 11. an air nozzle joint; 12. a circuit board; 13. a display screen; 14. an operation button; 15. a light guide pillar; 16. a housing; 17. and (4) heat dissipation holes.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

An inflator and an inflator according to embodiments of the present invention will be described below with reference to fig. 1 to 3.

According to the utility model discloses aerating device includes supporting seat 1, a plurality of cylinders 2 and drive arrangement 3, and each in a plurality of cylinders 2 all includes cylinder 201 and the piston of slidable ground cooperation in cylinder 201, and cylinder 201 is installed in supporting seat 1 and is equipped with the gas vent, and the piston has the first critical position of neighbouring gas vent and keeps away from the critical position of second of gas vent. The exhaust port is communicated with the air nozzle connector of the air charging device, and the air in the cylinder 201 sequentially passes through the exhaust port and the air nozzle connector under the extrusion of the piston, so that the air charging function of the air charging device is realized.

The driving device 3 is mounted on the supporting seat 1, the driving device 3 is connected with each of the plurality of pistons, and when one of the pistons is located at the first critical position, at least one of the pistons is located at the second critical position.

According to the utility model discloses aerating device, drive arrangement 3 is used for driving a plurality of pistons and slides in corresponding cylinder 201 in step, when one of them piston was slided to the second critical position by first critical position, have at least another piston to slide to first critical position by the second critical position, therefore, the gliding effect in turn of piston in two at least cylinders 201 has been realized, always a cylinder 201 is outwards carminative by the gas vent promptly, continuous gas filled effect has been realized from this, the inflating speed and the efficiency of aerifing have been improved, energy utilization has been promoted.

It can be understood that the driving device 3 may be one or more, when the driving device 3 is one, the driving device 3 may be connected to each of the plurality of pistons through a transmission mechanism, and the driving device 3 drives the plurality of pistons to synchronously slide back and forth; when there are a plurality of driving devices 3, the plurality of driving devices 3 may correspond to the plurality of pistons one by one, and the driving devices 3 are connected to the corresponding pistons, which is not limited in this embodiment.

Specifically, the support base 1 includes a support plate 101 and a mounting plate 102, the support plate 101 and the mounting plate 102 are perpendicular to each other and form the support base 1 in an L shape as a whole, and the support plate 101 and the mounting plate 102 may be connected by bolts, screws, or the like.

Wherein, the cylinder 201 is arranged on the support plate 101, and the cylinder 201 and the support plate 101 can be connected by bolts.

In some embodiments, as shown in fig. 2 and 3, the number of the cylinders 2 is two, and the sliding directions of the pistons in the two cylinders 2 coincide.

Two pistons are controlled to slide alternately through the driving device 3, the continuous inflation effect is achieved, on the basis, the two cylinders 2 are arranged, the continuous inflation effect is achieved, the number of parts is reduced to the greatest extent, the cost is saved, the assembly time is reduced, the assembly is simple, the process is less, and the assembly effect is improved.

In some embodiments, as shown in fig. 2, the inflator further includes a rotating member 4 and a connecting member 5, the rotating member 4 is pivotally connected to the supporting base 1, and the driving device 3 is connected to the rotating member 4 so as to drive the rotating member 4 to rotate. The connecting pieces 5 are the same in number as the cylinders 2 and correspond to the cylinders 2 one by one, the first ends of the connecting pieces 5 are hinged with the pistons in the corresponding cylinders 2, the second ends of the connecting pieces 5 are pivotally connected with the rotating piece 4, the pivot axes of the two connecting pieces 5 relative to the rotating piece 4 are coplanar with the pivot axes of the rotating piece 4 relative to the supporting seat 1, and the pivot axes of the rotating piece 4 relative to the supporting seat 1 are positioned between the pivot axes of the two connecting pieces 5 relative to the rotating piece 4.

It will be appreciated that the swivel member 4, the connecting member 5 and the piston constitute a crank-slider mechanism, whereby a reciprocating sliding effect of the piston is achieved.

The rotary part 4 is adopted to drive the two pistons to slide, so that the material consumption is less, the installation is simple and convenient, and the power is stable.

Furthermore, the pivoting axis of the two connecting elements 5 with respect to the rotating member 4 is symmetrical with respect to the pivoting axis of the rotating member 4 with respect to the supporting seat 1, effectively ensuring the alternate sliding of the pistons inside the two cylinders 201.

In some alternative implementations, the connector 5 may be rod-shaped, plate-shaped, strip-shaped, or the like.

In some embodiments, the inflator further includes a connecting shaft 6, the number of the rotating members 4 is equal to the number of the cylinders 2 and corresponds to one another, two rotating members 4 are respectively connected to two ends of the connecting shaft 6, two rotating members 4 are pivotally connected to the support base 1 through the connecting shaft 6, and second ends of two connecting members 5 are respectively pivotally connected to two rotating members 4.

The design is convenient for the installation of rotating member 4, and the transmission is stable, convenient assembling.

Wherein, one side that two rotating member 4 deviate from mutually links to each other with two connecting pieces 5 pivot ground respectively, when avoiding connecting piece 5 to do planar motion under the power of rotating member 4, produces interference with connecting axle 6, has guaranteed driven going on smoothly.

In addition, the number of the driving device 3 may be one, the driving device 3 is connected to any one of the two rotating members 4, and when one rotating member 4 rotates, the other rotating member 4 can be driven to rotate, so that the use cost is reduced.

In some embodiments, rotating member 4 comprises a turntable 401 or a crank.

Wherein, when the rotating member 4 adopts the setting of carousel 401, one side that two carousels 401 deviate from mutually all is equipped with the eccentric shaft, and the axis of two eccentric shafts and the axis coplane of connecting axle 6 and the axis symmetry setting of two eccentric shafts about connecting axle 6, and each of two eccentric shafts is equipped with the bearing, and connecting piece 5 passes through the bearing pivotally with corresponding eccentric shaft and links to each other.

The setting is convenient for carousel 401 installation and design like this, and carousel 401's rotation effect is obvious, is difficult for producing with supporting seat 1 and rotates the interference.

When the rotating member 4 is a crank arrangement, first ends of the two cranks are respectively connected with two ends of the connecting shaft 6, and second ends of the two cranks are respectively connected with the two connecting members 5 in a pivoting manner.

This reduces the use of material and further reduces costs, while the crank is lighter in weight, reducing frictional resistance in the transmission and reducing power consumption of the drive 3.

In some embodiments, as shown in fig. 2 and 3, the driving means 3 comprises a motor 301, a first bevel gear 302 and a second bevel gear 303. The motor 301 is arranged on the supporting seat 1, the first bevel gear 302 is coaxially connected with the motor 301 shaft of the motor 301, the second bevel gear 303 is coaxially connected with the connecting shaft 6, and the second bevel gear 303 is meshed with the first bevel gear 302.

The motor 301 drives the first bevel gear 302 to rotate, and further drives the second bevel gear 303 to rotate, so that the connecting shaft 6 and the rotating member 4 rotate, and the gear meshing mode achieves the effect of stable transmission.

The driving device 3 and the cylinders 2 can be arranged in the radial direction of the cylinder 201, and the projections of the motor 301 and the two cylinders 2 on the projection plane perpendicular to the length direction of the inflator are distributed in a triangular shape, so that the length and the cross-sectional area of the inflator are not too large, the structure is compact, and the occupied space is small.

It should be noted that the transmission ratio of the first bevel gear 302 and the second bevel gear 303 is greater than 1, so that the speed reduction effect is realized, and the transmission stability is improved.

In some embodiments, the motor 301 is a brushless motor or a brushed motor.

The brushless motor has the advantages of simple structure, low cost, better starting and braking effects and convenience in controlling the on-off of the air charging device.

The brush motor has the advantages of small running sound, high efficiency, long service life and low maintenance cost, thereby prolonging the service life of the air charging device and reducing the maintenance cost of the air charging device.

In some embodiments, the inflator further includes a battery assembly 7, the battery assembly 7 is electrically connected to the driving device 3, and the battery assembly 7 is aligned with the support base 1 in the sliding direction of the piston. The sliding direction of the piston is the length direction of the inflating device, so that the cross sectional area of the inflating device is reduced, and the inflating device is convenient to carry and hold.

Specifically, the battery assembly 7 may be connected to the mounting plate 102 to ensure the relative fixation of the battery assembly 7 and the supporting seat 1, so as to ensure the stable power supply to the motor 301, and at the same time, ensure the straight state of the inflator.

Wherein, the battery pack 7 and the mounting plate 102 are connected through bolts.

In some embodiments, the battery assembly 7 includes a battery compartment 701 and a plurality of batteries, the battery compartment 701 has a receiving cavity, and the plurality of batteries are installed in the receiving cavity and arranged in sequence along the circumferential direction of the receiving cavity.

Design make full use of like this and hold the space of intracavity to the battery is more neat holding the intracavity installation, and the design of a plurality of batteries has increased the duration of a journey ability of device simultaneously, has realized the effect of long duration of a journey.

Incidentally, the longitudinal direction of the battery coincides with the longitudinal direction of the battery compartment 701.

In some embodiments, the cross-sectional shape of the receiving cavity is triangular, and the number of the batteries is three;

or the cross section of the accommodating cavity is quadrilateral, and the number of the batteries is four.

The shape of holding the chamber and the quantity phase-match of battery have guaranteed that each battery contacts with the wherein two sides that holds the chamber, and under the effect of each battery, each battery ends to support on above-mentioned two sides, and the installation is stable, is difficult for rocking.

Optionally, the cross-sectional shape of the accommodating cavity is a polygon, and the number of the batteries is equal to the number of sides of the polygon.

The outer contour of the cross section of the battery compartment 7 is matched with the shape of the cross section of the containing cavity, a separating frame is arranged in the containing cavity and comprises a central shaft and a plurality of separating plates, the central shaft axis coincides with the central line of the containing cavity, the separating plates are uniformly distributed along the direction of the cross section contour of the containing cavity, one end of each separating plate is connected with the central shaft, the other end of each separating plate is connected with the wall surface of the battery compartment 701, the number of the separating plates is consistent with the number of the sides of the cross section area of the containing cavity, two adjacent separating plates and the wall of the battery compartment 7 surround to form a sub-containing space, the sub-containing space is matched with the size of a single 18650 battery, the plurality of batteries are respectively placed in the sub-containing spaces, the non-contact between the batteries is guaranteed, the mutual interference is avoided, and the installation stability of the batteries is further guaranteed.

In some embodiments, the inflator further includes a plurality of exhaust check valves 8, the number of the exhaust check valves 8 is equal to that of the cylinders 2, and the exhaust check valves 8 are in one-to-one correspondence, and the exhaust ports are closed by being connected to the respective cylinders 201.

Therefore, the backflow of the exhaust gas is avoided, and the inflation effect of the inflation device is ensured.

Specifically, the exhaust check valve 8 is provided at the end of the cylinder 201, whereby the influence on the sliding stroke of the piston is reduced, and the inflation effect is improved.

In some embodiments, the cylinder 201 is provided with an air supply check valve, or the piston is sleeved with a cup to facilitate air supply to the inside of the cylinder 201. That is, when the piston slides from the first critical position to the second critical position, the external air is supplied to the cylinder 201 through the air supply check valve or the gap between the leather cup and the cylinder 201, so that the air supply function is ensured, and meanwhile, air leakage at positions except the exhaust port when the piston slides from the second critical position to the first critical position is avoided.

Specifically, the air make-up check valve is provided adjacent to the end of the cylinder 201 where the exhaust check valve 8 is provided.

In some embodiments, as shown in fig. 2, the inflator includes an air valve 9, a sealing ring 10, and a nozzle joint 11, the air valve 9 is communicated with each of the two exhaust check valves 8, the nozzle joint 11 is connected with the air valve 9, and the sealing ring 10 is sleeved at the joint of the nozzle joint 11 and the air valve 9.

In some embodiments, as shown in fig. 1, a circuit board 12 is mounted on the support plate 101, and a display 13 and operation buttons 14 are mounted on the circuit board 12.

Wherein, the circuit board 12 and the supporting plate 101 are connected by bolts, and the display screen 13 and the operation buttons 14 are respectively connected with the circuit board 12 by bolts.

In some embodiments, the supporting plate 101 is provided with a light guide pillar 15 for guiding light to be uniformly guided out.

As shown in fig. 1, the inflator according to the embodiment of the present invention includes a housing 16 and an inflator according to any one of the above embodiments, and the inflator is installed in the housing 16.

According to the utility model discloses aerify precious, shell 16 is used for to the aerating device protection, avoids aerating device to expose, reduces the burden that the clearance was maintained, reduces the risk of damage. In addition, according to the utility model discloses other technical advantages of aerifing precious are the same with the aerating device's of above-mentioned embodiment technical advantage, and the no longer redundant description here.

In some embodiments, the housing 16 is provided with a heat dissipation hole 17 for dissipating heat, so as to prevent the operation of the driving device 3 from being affected by an excessive temperature inside the housing 16.

Simultaneously, louvre 17 is used for with the inside and external intercommunication of shell 16, the circulation of air inside and outside the shell 16 of being convenient for, from this, the inside tonifying qi of cylinder 201 of being convenient for goes on.

In some embodiments, the housing 16 is open at one end and has a front cover at the opening that removably snaps onto the housing 16.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless explicitly specified otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

In the present invention, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the second feature or the first and second features may be indirectly contacting each other through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" and the like mean that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims (14)

1. An inflator device, comprising:

a supporting seat;

a plurality of cylinders, each of the plurality of cylinders including a cylinder and a piston slidably fitted within the cylinder, the cylinder being mounted to the support base and provided with an exhaust port, the piston having a first critical position adjacent the exhaust port and a second critical position remote from the exhaust port; and

the driving device is arranged on the supporting seat and is connected with each of the plurality of pistons, and when one of the pistons is located at the first critical position, at least one of the pistons is located at the second critical position.

2. The inflator according to claim 1, wherein the number of the cylinders is two, and the sliding directions of the pistons in the two cylinders coincide.

3. The inflator device according to claim 2, further comprising:

the rotating part is pivotally connected with the supporting seat, and the driving device is connected with the rotating part so as to drive the rotating part to rotate; and

the connecting piece, the connecting piece with the same and the one-to-one of quantity of cylinder, the first end of connecting piece with corresponding in the cylinder the piston is articulated, the second end of connecting piece with revolving part pivotally connected to each other, two the connecting piece is relative the pivot axis of revolving part with the revolving part is relative the pivot axis coplane of supporting seat, the revolving part is relative the pivot axis of supporting seat is located two the connecting piece is relative between the pivot axis of revolving part.

4. The inflator according to claim 3, further comprising connecting shafts, wherein the number of the rotating members is equal to the number of the cylinders and corresponds to one another, two of the rotating members are connected to both ends of the connecting shafts, respectively, the two rotating members are pivotably connected to the support base through the connecting shafts, and second ends of the two connecting members are pivotably connected to the two rotating members, respectively.

5. The inflator device of claim 4 wherein the rotating member comprises a turntable or a crank.

6. The inflator device according to claim 4, wherein the drive device comprises:

the motor is arranged on the supporting seat;

the first bevel gear is coaxially connected with a motor shaft of the motor; and

the second bevel gear is coaxially connected with the connecting shaft and meshed with the first bevel gear.

7. The inflator device of claim 6 wherein the motor is a brushless motor or a brush motor.

8. The inflator device according to claim 1, further comprising a battery assembly electrically connected to the driving device, the battery assembly being aligned with the support base in a sliding direction of the piston.

9. The inflator device according to claim 8, wherein the battery assembly includes a battery compartment and a plurality of batteries, the battery compartment has a receiving chamber, and the plurality of batteries are mounted in the receiving chamber and arranged in sequence along a circumferential direction of the receiving chamber.

10. The inflator device of claim 9,

the cross section of the accommodating cavity is triangular, and the number of the batteries is three;

or the cross section of the accommodating cavity is quadrilateral, and the number of the batteries is four.

11. The inflator according to claim 1, further comprising a plurality of exhaust check valves, the number of the exhaust check valves being equal to the number of the cylinders and corresponding to one another, the exhaust check valves being connected to the respective cylinder barrels and closing the exhaust ports.

12. The inflation device of claim 1, wherein the cylinder barrel is provided with an air supply one-way valve, or the piston is sleeved with a leather cup.

13. An inflatable device comprising a housing and an inflatable device as claimed in any of claims 1 to 12, the inflatable device being mounted within the housing.

14. The inflatable appliance of claim 13, wherein the housing is provided with heat dissipation apertures.

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