CN111336091A - Portable Inflator - Google Patents

Abstract

The invention discloses a portable inflator, which comprises a casing provided with an air inlet and an air outlet, a motor, a piston and a cavity formed by them; the piston and the motor are connected by a torque transmission mechanism that switches the rotary motion of the motor to a linear motion , the torque transmission mechanism includes an output shaft driven by the motor to rotate, a rotary drive slot is formed on the side wall of one of the output shaft and the piston, and a limit hole or slot is formed on the other, and the limit hole or slot is defined with a During the rotation of the output shaft, the rolling element moves in the rotary drive slot and constantly switches the distance from the motor. On the basis of retaining the automatic pumping function, this scheme adopts the method of reciprocating movement of the rolling element in the rotary drive groove. The structure is simple and the space is small, which creates favorable conditions for the miniaturization of the whole machine and provides the possibility to carry it with you. More ingeniously, the rolling connection method can effectively reduce the wear and heat between the piston and the output shaft, which is conducive to maintaining the long-term and stable use of the equipment.

Description

Portable Inflator

technical field

The present invention relates to the field of inflatable equipment, in particular to a portable inflator.

Background technique

Inflatable equipment is a special equipment for inflating airbags, balloons, tires and other products, and is closely related to people's daily life.

There are many types of pumping equipment, mainly manual pumping equipment and electric pumping equipment. In order to achieve the function of being easy to carry, the manual inflating device reduces the size of the inflating device as much as possible in the form of the inflating device. However, due to the reduced volume of the manual inflating device, the inflatable cavity is small. When inflating, it is difficult for the user to hold the manual inflating device to inflate the air. laborious.

Various electric inflating devices use motors as a power source to drive the piston to move to achieve inflating. For example, "an electric inflating device" disclosed in the application number 200820169983.1 is a typical electric inflating device, which includes a barrel body and a The cylinder in the barrel is provided with a cylinder nut for connecting the air nozzle. The battery pack and the motor form a power source. The motor output shaft is connected to the gear pair, and the gear pair is connected to the piston of the cylinder through the connecting rod to realize the reciprocating motion of the piston. Such an electric pumping device is bulky and inconvenient to carry. The axial direction of most of the motors in the existing electric air pumping equipment is perpendicular to the reciprocating direction of the piston. Therefore, the motor and the cylinder are located in two different axial directions, which are distributed at right angles. Accordingly, the volume of the electric air pump is relatively small. It is large, takes up a lot of space, and is not easy to carry around. Especially for cycling enthusiasts, portable and easy-to-use pumping equipment is what they need.

Although there are also some relatively small-sized electric pumping devices, such as the structure disclosed in the application number 2014202418421, the driving structure of this structure adopts a gear structure to convert the rotary motion of the motor into the linear movement of the piston. The axis is perpendicular to the axis of the cylinder and is located below the cylinder. In addition, a certain support structure is required to enable it to rotate. Therefore, the area of the corresponding area of the cylinder must be large enough to effectively realize the installation of the driven gear. This results in an increase in the inner diameter of the entire cylinder, which hinders further miniaturization of the entire machine mechanism.

In addition, the volume of the air cavity formed between the piston rod and the piston cylinder is small, the amount of gas that can be filled into the object to be inflated by one reciprocating movement of the piston is small, and the inflating efficiency is low.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a portable inflator in order to solve the above problems existing in the prior art.

The object of the present invention is achieved through the following technical solutions:

Portable inflator including

The shell is provided with an air inlet and an air outlet;

a motor, arranged in the casing to provide power;

a piston, which is telescopically arranged in the casing and driven by a motor, and a cavity is formed between the piston and the casing;

The piston and the motor are connected by a torque transmission mechanism that switches the rotary motion of the motor into linear motion, the torque transmission mechanism includes an output shaft driven by the motor to rotate, and the output shaft is connected to the side wall of one of the pistons. A swivel drive slot is formed on the other, and a limit hole or slot is formed on the other. The limit hole or slot defines a rolling element that moves in the swivel drive slot and constantly switches the distance from the motor during the rotation of the output shaft.

Preferably, in the portable inflator, the casing is in the shape of a straight cylinder.

Preferably, in the portable inflator, the diameter/length ratio of the whole machine is between 14/150 and 30/100, preferably the outer diameter of the casing is less than 25mm and/or the length of the casing is not more than 200mm .

Preferably, in the portable inflator, the casing, the motor, the piston and the air outlet are coaxial.

Preferably, in the portable inflator, an anti-twist structure for limiting the rotation of the piston is formed between the piston and the inner wall of the housing.

Preferably, in the portable inflator, the anti-twist structure enables the piston to be slidably connected and/or rolled to the inner wall of the housing.

Preferably, in the portable inflator, the anti-twist structure at least includes a guide groove formed on the inner wall of the casing and parallel to its extending direction, and the rolling element in the torsion transmission mechanism is embedded in the guide groove middle.

Preferably, in the portable inflator, the anti-twist structure includes a plurality of guide grooves formed on the inner wall of the casing and parallel to the extending direction thereof, and rolling balls or needles embedded in the guide grooves, The balls or needles are defined in defined holes or grooves formed in the side walls of the piston.

Preferably, in the portable inflator, a battery for supplying power to the motor is provided in the casing, and the axis of the battery is at least parallel to the axis of the motor.

Preferably, in the portable inflator, the circuit board of the casing is parallel to or coaxial with the axis of the motor.

The advantages of the technical solution of the present invention are mainly reflected in:

1. On the basis of retaining the automatic pumping function, this scheme adopts a variety of methods to convert the motor torque into the linear movement of the piston. The specific driving structure can be selected according to different needs, and the application is flexible, and these driving structures are simple and occupy space. It is small, which creates favorable conditions for the miniaturization of the whole machine and provides the possibility for carrying it around. In addition to the above advantages, the driving method of the rolling element reciprocating in the rotary drive groove is more ingenious. The rolling connection method can effectively reduce the wear and heat between the piston and the output shaft, which is conducive to maintaining long-term and stable equipment. used. Through the electronic control of the forward and reverse rotation of the motor, combined with the ball screw drive structure and the screw drive structure, both the helical groove and the rolling connection or the sliding connection structure are used, which provides an effective implementation method for the small size drive structure. At the same time, the ball screw The drive structure also has the advantages of reducing wear and heat; and the threaded drive structure can make the overall structure simpler and smaller, and minimize the size. A variety of ways are used to convert the motor torque into the linear movement of the piston, and the specific drive structure can be selected according to different needs, and the application is flexible, and these drives are used.

2. The length and outer diameter of the shell of this solution are set so that the size of the whole machine can effectively meet the requirements of pocket carrying, which greatly facilitates the user to carry it with him at any time.

3. The overall shape of this solution is a cylindrical pen shape, with a simple and elegant appearance, which is convenient for ergonomics, convenient for hand-holding, and can also increase the interest of users.

4. The coaxial arrangement of the motor, piston, air outlet, battery, circuit board, etc. in this scheme can make the internal structure more compact, which is conducive to maximizing the reduction of the length and pipe diameter of the casing, and is conducive to further improving the structure of the whole machine. Shrink; also facilitates wiring.

5. The special intake channel structure and channel switch structure effectively ensure the realization of intake and exhaust, and provide a stable and reliable implementation.

6. There is a rolling connection between the piston and the casing or the output shaft. On the one hand, the rolling connection can effectively reduce the friction between the piston and the casing, reduce the wear and heat between the components, and prolong the service life. .

7. The rolling elements in the driving structure can also cooperate with the guide grooves on the inner wall of the housing to form an anti-twist structure, so that even if no separate anti-twist structure is provided, the dual functions of anti-twist and driving can be realized, which is conducive to simplifying the structure and is a better overall structure. Small.

8. The cavity of this scheme is directly formed by the piston and the shell, and does not require components such as the piston cylinder, which not only simplifies the structure, but also maximizes the volume of the air cavity under the condition of limited size, thereby increasing the single inflation volume, It can greatly improve the inflation efficiency.

Description of drawings

Figure 1 is a cross-sectional view of the present invention;

Figure 2 is a front view of the present invention;

3 is a perspective view of the housing of the present invention;

Fig. 4 is the perspective view of the output shaft of the present invention;

5 is a cross-sectional view of the third embodiment of the torque transmission mechanism of the present invention (the structure in the figure is only a schematic diagram, not the only limitation);

6 is a cross-sectional view of the fifth embodiment of the torque transmission mechanism of the present invention (the structure in the figure is only a schematic representation, not the only limitation);

Fig. 7 is the tail end schematic diagram of the present invention;

Figure 8 is a perspective view of the piston of the present invention;

FIG. 9 is an enlarged view of the area A in FIG. 1 .

Detailed ways

The objects, advantages and features of the present invention will be illustrated and explained by the following non-limiting description of the preferred embodiments. These embodiments are only typical examples of applying the technical solutions of the present invention, and all technical solutions formed by taking equivalent replacements or equivalent transformations fall within the scope of protection of the present invention.

In the description of the scheme, it should be noted that the terms "center", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", " The orientation or positional relationship indicated by "inside", "outside", etc. is based on the orientation or positional relationship shown in the drawings, which is only for convenience and simplification of description, rather than indicating or implying that the indicated device or element must have a specific orientation , constructed and operated in a specific orientation, and therefore should not be construed as limiting the invention. Furthermore, the terms "first", "second", and "third" are used for descriptive purposes only and should not be construed to indicate or imply relative importance. In addition, in the description of the solution, with reference to the operator, the direction close to the operator is the proximal end, and the direction away from the operator is the distal end.

A portable inflator disclosed by the present invention will be described below with reference to the accompanying drawings. As shown in Figures 1 to 3, it includes a casing 1, which is used to provide an installation space, which may be various feasible There are various feasible shapes of the cavity inside, such as plastic, metal, etc., for example, it can be the shape of a conventional manual pumping device, or it can be the shell shape of a gun drill, etc.

Preferably, the casing 1 is in the shape of a straight cylinder, and the straight cylinder can be integrally formed by injection molding, or can be assembled from two semi-circular components, or can be multi-section pipe fittings screwed or welded or glued or interference fit, etc. assembled.

As shown in FIG. 1 to FIG. 3 , the casing 1 preferably includes a hollow tube 106 with two ends open. An end plate 105 is provided at one end of the hollow tube 106 , and the other end of the hollow tube 106 is provided with an end plate 105 . One end is detachably provided with an air pump 101, and the air pump 101 can be connected to the hollow tube 106 by means of screw connection or interference fit. The cross-section of the air pump and the hollow tube 101 (the cross-section obtained by taking a plane parallel to the axis of the housing 1 as the cutting plane) can be of various feasible shapes, such as the shape of the housing 1 . The cross-section is a circle or an ellipse or a regular polygon with a number of sides not less than 4. Preferably, the cross-sectional shape of the straight cylinder is a circle as an example, and the pipe diameters of different regions of the housing 1 can be the same or different. It is specifically designed according to the required internal structure.

The length and size of the housing 1 are important factors for portability. Therefore, in a preferred embodiment, the diameter/length ratio of the housing 1 is between 14/150 and 30/100. More preferably, the diameter of the casing 1 is not more than 25mm, more preferably not more than 20mm; at the same time, the length of the casing 1 is preferably below 200mm, more preferably below 180mm, and the size of the entire device is only slightly larger than that of a straight pen. , can be placed in the pocket on the clothes, so that it can be easily carried around.

As shown in FIG. 1 , the housing 1 is provided with a motor 2 and a piston 3 driven by it to reciprocate along the extending direction of the housing 1 . The motor 2 can be any feasible motor, such as a servo motor Motors, stepping motors, etc., and even in some cases, air motors can be used. The motor 2 is fixed in the housing 1 by a fixing seat (not shown in the figure), and the fixing seat cannot be opposite to the housing. Body 1 rotates. And the rotating shaft of the motor 2 and the rotating shaft of the casing 1 are at least parallel, preferably coaxial, so that the size of the inner cavity of the casing 1 can be effectively reduced, thereby reducing the size of the entire casing 1 . Of course, in other embodiments, the motor shaft of the motor 2 can also be non-parallel to the axis of the piston 3, that is, in a vertical state. At this time, the motor and the torque transmission mechanism need a larger installation space, so the whole pumping equipment size will increase accordingly.

As shown in FIG. 1 , a reducer 10 is arranged between the motor 2 and the piston 3 so as to control the rotational speed of the motor 2 and enhance the driving force, which is a prior art, and will not be described here. , preferably the power output shaft 1001 of the reducer 10 is coaxial with the axis of the motor 2 .

In addition, the motor 2 drives the piston 3 to reciprocate through a torque transmission mechanism that converts its torque into linear movement, and the torque transmission mechanism can be implemented in various ways.

In a first feasible embodiment, as shown in FIG. 1 , the torque transmission mechanism includes an output shaft 11 , and the output shaft 11 is coaxially connected with the power output shaft 1001 of the reducer 10 . The shaft 11 is connected with the power output shaft 1001 by means of screw connection, interference fit connection or the like.

As shown in FIG. 1 and FIG. 4 , a swirling driving slot 1101 is formed on the circumferential wall of the output shaft 11 , and the swirling driving slot 1101 is a closed annular slot, and the front end of the output shaft 11 is inserted into Connected to the inside of the slot 31 on the piston 3, at the same time, the inside of the output shaft 11 is hollow, and its side wall has an opening 1102, and the opening 1102 is communicated with the front port 1103 of the output shaft 11, so as to To dredge the air pressure inside the piston 3 .

As shown in FIG. 1 and FIG. 8 , the groove wall of the slot 31 of the piston 3 has a limit hole or groove 306 , and a rolling element 12 is rotatably provided in the limit hole or groove 306 . Such as steel balls or steel needles, the steel balls or steel needles protrude out of the limiting hole or slot 306 and are embedded in the swivel drive slot 1101 , so that when the motor 2 drives the output shaft 11 to rotate, The steel ball or the steel needle moves in the swivel drive slot 1101 and switches positions continuously. Since the steel ball or the steel needle is in different positions of the swivel drive slot 1101, the distance from the motor to the motor varies from far to near, and from near to far. and the steel ball or steel needle is limited to the piston 3, so the left and right movement of the steel ball or steel needle drives the left and right movement of the piston 3, and the distance between the steel ball or steel needle and the piston 3 and the output shaft 11 is Rolling friction can effectively reduce frictional heat generation and wear, avoid overheating in the cavity from affecting the work of electrical components such as motors, and help prolong the service life of components.

In a second feasible embodiment, the piston 3 can also be coaxially inserted into the slot (not shown in the figure) of the output shaft 11 , correspondingly, the outer wall of the piston 3 is formed with the In the rotary drive slot 1101, the slot wall of the slot of the output shaft 11 is provided with a limit slot or hole for limiting the ball or needle 12. The principle here is the same as the above embodiment, and will not be repeated.

In a third feasible embodiment, as shown in FIG. 5 , the torque transmission mechanism includes the output shaft 11 , and the output shaft 11 is also coaxially inserted into the slot 31 at the tail of the piston 3 , And an external thread 111 (equivalent to an external thread groove) is formed on the peripheral wall of the output shaft 11, and an internal thread 32 matching the above-mentioned external thread 111 is formed on the groove wall of the slot 31 of the piston 3. The connection structure with the external thread is a sliding friction connection. At the same time, the piston 3 is restricted by an anti-twist structure and cannot rotate relative to the housing 1, and the specific anti-twist structure will be described in detail below.

At this time, when the motor 2 needs to drive the output shaft 11 forward and reverse through staggered forward and reverse rotation, the thread of the output shaft 11 and the piston 3 that engage with each other can effectively drive the output shaft 11 when the output shaft 11 is forward and reversed. The piston 3 moves left and right relative to the output shaft 11 .

Of course, in a fourth feasible embodiment, the external thread in the third embodiment can also be provided on the outer wall of the piston 3 , and the internal thread can also be provided on the output shaft 11 .

In a fifth feasible embodiment, as shown in FIG. 6 , a ball screw structure is formed between the output shaft 11 and the piston 3 , for example, a rotary drive is formed on the outer wall of the output shaft 11 Slot 112, at this time, the swirling drive slot is not annular, and a limiting slot or hole 34 for limiting at least one rolling element 12 is formed on the groove wall of the slot 31 of the piston 3, and the rolling element 12 makes the Rolling friction is formed between the piston and the output shaft 3 . At the same time, the piston 3 is restricted by an anti-twist structure and cannot rotate relative to the casing 1. The specific anti-twist structure will also be described in detail below.

At this time, the motor 2 also needs to drive the output shaft 11 to rotate forward and reverse through staggered forward and reverse rotations, so as to drive the piston 3 to move left and right relative to the output shaft 11 . And the structure similar to the lead screw can effectively reduce the friction and heat between the output shaft 11 and the piston 3 . Of course, the helical groove can also be provided on the piston, and the limiting groove or hole is provided on the output shaft 11 .

Of course, in other embodiments, the motor 2 and the torque transmission mechanism can also form a structure similar to the existing electric push rod, and the push rod is connected with the piston, so that the reciprocating movement of the push rod can drive the reciprocating straight line of the piston Moving, the structure of the electric push rod here is a known technology, and will not be repeated here.

Further, when the axis of the motor 2 is perpendicular to the axis of the housing 1, at this time, the motor 2 can drive the piston 3 to reciprocate through a crank connecting rod mechanism, etc., which is a known technology here, and no To repeat, correspondingly, the size of the whole machine is larger than the structure of the above-mentioned coaxial embodiment.

The anti-twist structure of the piston 3 can be in many ways. In a feasible way, at least one guide block (not shown in the figure) is formed on the side wall of the piston 3, and in the housing. The inner wall of 1 is formed with guide grooves corresponding to the guide blocks one-to-one, so that when the piston 3 reciprocates, the guide blocks can slide back and forth in the guide grooves to limit the rotation of the piston 3 . Of course, the above-mentioned guide block can also be arranged on the inner wall of the housing 1 , and the guide groove is arranged on the side wall of the piston 3 .

However, in the above-mentioned anti-twist structure, the guide block and the piston are slidably connected to the inner wall of the housing 1, since there is a large amount of sliding friction between the piston 3 and the inner wall of the housing 1 during the reciprocating movement, This is obviously unfavorable to the prolongation of the service life of each part and the heat dissipation in the casing. Therefore, in a more preferred embodiment, it is obviously necessary to use rolling friction between the piston 3 and the inner wall of the casing 1 to reduce friction of.

In a feasible manner, as shown in FIG. 5 and FIG. 6 , at least one guide groove 107 extending parallel to the axis of the piston 3 may be provided on the inner wall of the housing 1 , preferably A plurality of, more preferably at least three, and distributed in a polygonal shape, the outer peripheral wall of the piston 3 is formed with a defined hole or groove 33 corresponding to the position of each of the guide grooves 107, and each of the guide grooves on the piston 3 is formed. The number of corresponding limiting holes or grooves 33 is multiple, and a ball or needle 20 is defined in the limiting hole or groove 33, and the ball or needle 20 is simultaneously embedded in the corresponding guide groove 107 and makes the A small gap is maintained between the inner wall of the housing 1 and the outer wall of the piston 3 , so as to realize the rolling connection between the piston 3 and the housing 1 .

Of course, the above-mentioned guide groove 107 can also be provided on the side wall of the piston 3 , and the limiting hole or groove 33 can also be provided on the inner wall of the housing 1 .

In a more preferred embodiment, as shown in FIG. 1 , the above-mentioned rolling elements 12 located in the swirling drive groove 1101 also protrude out of the two openings of the fixed through hole 306 formed on the piston 3 , And embedded in the guide groove 107 formed on the inner wall of the housing 1, at this time, part of the defining groove or hole 33 and balls or needles can be omitted.

As shown in FIG. 1 , the piston 3 and the casing 1 and the air outlet head 101 located at the front end of the casing 1 have a one-way control structure that only allows gas to be discharged from the casing 1 to the outside of the air outlet head 101 . A cavity 5 is formed between 4, and the reciprocating movement of the piston 3 continuously sucks the external gas into the cavity 5, compresses it, and discharges it from the air outlet of the air outlet head 101.

To allow the external air to enter the cavity 5, various structures can be used to achieve it. In a feasible way, for example, an air inlet (not shown in the figure) is formed on the casing 1. The air port is located on the side wall of the housing 1 and is located between the piston 3 and the air outlet 101, and the air inlet still maintains a distance from the piston 3 when the piston 3 moves to the foremost end. The air inlet is connected to a one-way valve (not shown in the figure) located in the shell 1, the one-way valve is that the gas can only flow into the shell 1 from the outside of the shell, but cannot flow out from the shell to the shell In vitro, it is a known technique here, and it is not repeated here.

In yet another optional embodiment, as shown in FIG. 1 , external air is introduced into the cavity 5 through an air intake channel 6 , that is, the cavity 5 is connected to the housing through the air intake channel 6 . The intake port 102 on the 1 is connected, and the intake passage 6 conducts at the first position of the piston 3, and is closed at the second position of the piston 3.

Here, the structure of the air intake passage 6 and its on-off control structure are the difficulties in the realization of this solution. The inventor has obtained a feasible structure through a lot of creative work, the details are as follows:

As shown in FIG. 3 , FIG. 7 , and FIG. 8 , the air inlet 102 provided on the end plate 105 of the casing 1 , and the air inlet passage 6 includes at least one formed on the inner wall of the casing 1 . An air inlet slot 103, preferably a plurality of air inlet slots 103, and their shape can be a triangular slot or an arc slot, wherein the triangular slot can be used as a limiting structure to install the corresponding mounting seat and prevent them from rotating. The air intake groove 103 communicates with the first air vent groove 301 on the outer wall of the piston 3. Here, the air outlet end of the air intake groove 103 communicates with the inner cavity of the housing 1. The air inlet end of a ventilation groove 301 communicates with the inner cavity of the housing 1 to realize the communication between the air inlet groove 103 and the first ventilation groove 301 .

Moreover, as shown in FIG. 8 , the piston 3 is further provided with a groove 302 at the front end of the first ventilation groove 301 , and a second ventilation groove 303 is provided at the bottom of the groove 302 . The two ventilation grooves 303 communicate with the ventilation holes 305 on the top plate 304 at the front end of the piston 3 . The outside air enters the casing 1 from the air inlet 102 and enters the inner cavity of the casing 1 through the air inlet groove 103. When the first ventilation groove 301 and the second ventilation groove 303 are in communication, The air intake channel 6 is connected, and the air in the inner cavity of the housing 1 enters the cavity 5 from the first ventilation groove 301 , the second ventilation groove 303 , and finally the ventilation hole 305 .

On the contrary, when the first ventilation groove 301 and the second ventilation groove 303 cannot communicate with each other, the air intake passage 6 is closed, and the air in the inner cavity of the housing 1 cannot enter the cavity 5 .

As shown in FIG. 1 and FIG. 9 , the air intake passage 6 is connected and disconnected by a sealing ring 7 located in the groove 302 and having a width smaller than the width of the groove 302 . Specifically, the sealing ring 7 seals This is achieved by blocking the gas outlet end of the first ventilation groove. As shown in FIG. 2 and FIG. 3 , the sealing ring 7 can be made of various feasible sealing materials, which are in close contact with the inner wall of the housing 1 to achieve sealing, and due to the width of the sealing ring 7 It is smaller than the width of the groove 302 , so the sealing ring 7 not only reciprocates in the groove 302 but also follows the piston 3 for a certain displacement during the reciprocating movement of the piston 3 .

When the piston 3 moves to the left (moves to the first position), the sealing ring 7 is in close contact with the first side surface 3022 of the groove 302. At this time, the first ventilation groove 301 and the second ventilation groove 303 is connected, and the gas enters the cavity 5, which is similar to the action of pulling the piston outward to make the cavity pump air in a traditional pumping device.

When the piston 3 moves to the right (moves to the second position), the sealing ring 7 is in close contact with the second side surface 3021 of the groove 302 , and the sealing ring 7 seals the first ventilation groove 301 At the gas outlet, the first ventilation groove 301 cannot be communicated with the second ventilation groove 302. At this time, the ventilation pipe 6 is closed. At this time, the piston 3 compresses the gas located in the cavity 5, and the gas flows from the gas outlet head. 101 is discharged to achieve a boost.

Of course, in other embodiments, the sealing ring 7 may not move synchronously with the piston 3 , but just fit with both sides of the groove 302

As shown in FIG. 1, the one-way control structure 4 provided in the air outlet head 101 is a one-way valve, which includes a valve body 401 and a spring 402, the valve body 401 is connected with the spring 402, and is located in the The elastic force of the spring 402 is in contact with the air outlet of the cavity 5 . For the convenience of installation and disassembly, the air outlet head 101 is connected with the housing 1 by screws. The inner wall of the air outlet in the center of the air outlet head 101 is provided with threads, so as to adapt to different types of connection heads for pumping air.

As shown in FIG. 1 , in order to provide electrical energy to the motor 2 , a battery 8 for supplying power to the motor 2 is provided in the casing 1 , and the axis of the battery 8 is parallel to the axis of the motor 2 . When there is one battery 8, it is arranged coaxially with the motor 2; when there are multiple batteries 8, they are distributed in a ring shape. And, preferably, the battery 8 is located between the motor 2 and the end plate 105 . The battery 8 may be any known battery, preferably a rechargeable battery.

As shown in FIG. 7 , the housing 1 is provided with a charging port 104 that is electrically connected to the battery 8 . The charging port 104 may be various known power ports, such as various USB ports, or more It is preferably a type-c interface, a lignting interface, etc. The charging port 104 can also be used to directly connect an external power source to supply power to the motor 2 . The use of the rechargeable battery is more environmentally friendly, and the setting of the charging port avoids replacing the battery multiple times, which is more convenient for the user's daily use and is conducive to protecting the environment. Of course, the charging interface can not only charge the battery 8, but also can directly supply power to the motor through the circuit structure on the circuit board. The motor supplies power, and the battery 8 is charged at the same time. On the contrary, when there is no connection line, the battery 8 supplies power to the motor. The circuit structure here is a known technology and will not be repeated.

The existence of the charging port 104 is obviously unfavorable for waterproof and dustproof. Of course, in other embodiments, the charging port 104 can also be omitted, so the battery can be charged by taking the battery out of the casing. Here It is a known technology and will not be described in detail.

As shown in FIG. 7 , the casing 1 is provided with a start-stop switch 9 , and the motor 2 is electrically connected to and controlled by the start-stop switch 9 . For the sake of appearance, the charging port 104 and the start-stop switch 9 are arranged on the tail cover 105 of the housing 1 together with the air inlet 102 . In other embodiments, the charging port 104 and the start-stop switch 9 may also be arranged at other locations.

At the same time, in other implementations, the corresponding start-stop switch can also be omitted, and the start-stop of the motor can be controlled by remote control, for example, the remote control system of conventional Internet of Things systems such as infrared remote control or wireless communication or Bluetooth communication. The start and stop of the motor can be controlled by means of the control method, and even the start and stop of the motor can be controlled by means of language control. The innovative point will not be repeated here.

As shown in FIG. 1 , the start-stop switch 9 and the charging structure are connected to the circuit board 30 , and the circuit board is located between the battery 8 and the end plate 105 , and its axis is at least connected to the housing 1 . The axes are parallel, so that the arrangement structure of the circuit board, the battery and the motor can effectively facilitate the wiring and make the internal structure more compact, which is conducive to the miniaturization of the whole machine.

The invention has a simple and delicate structure, and uses the motor 2 to control the piston 3 to pump up quickly, thereby improving the pumping efficiency of the pumping device, reducing the difficulty of use, and saving time and effort. The straight-shaped appearance of the pumping device is convenient for ergonomics, hand-held and easy to carry.

The present invention still has multiple embodiments, and all technical solutions formed by using equivalent transformations or equivalent transformations fall within the protection scope of the present invention.

Claims (10)

1. Portable inflator, including The casing (1) is provided with an air inlet and an air outlet; a motor (2), arranged in the housing (1) to provide power; a piston (3), which is reciprocally and telescopically arranged in the housing (1) and is driven by the motor (2), and a cavity (5) is formed between the piston and the housing (1); It is characterized in that: the piston (3) is connected with the motor (2) through a torque transmission mechanism that switches the rotary motion of the motor into linear motion, and the torque transmission mechanism includes an output shaft driven by the motor (2) to rotate. (11), a rotary drive slot (1101) is formed on the side wall of one of the output shaft (11) and the piston (3), and a limit hole or groove is formed on the other During the rotation of the output shaft, a rolling element is defined which moves in the slewing drive slot and constantly switches the distance from the motor (2). 2 . The portable inflator according to claim 1 , wherein the casing ( 1 ) is in the shape of a straight cylinder. 3 . 3. The portable inflator according to claim 2, wherein the diameter/length ratio of the whole machine is between 14/150 and 30/100. 4 . The portable inflator according to claim 1 , wherein the casing ( 1 ), the motor ( 2 ), the piston ( 3 ) and the air outlet are coaxial. 5 . 5. The portable inflator according to any one of claims 1-4, characterized in that an anti-twist structure is formed between the piston (3) and the inner wall of the housing (1) to limit the rotation of the piston (3). 6 . The portable inflator according to claim 5 , wherein the anti-twist structure enables the piston ( 3 ) to be slidably connected and/or rolled with the inner wall of the housing ( 1 ). 7 . 7. The portable inflator according to claim 5, characterized in that: the anti-twist structure at least comprises a guide groove formed on the inner wall of the casing (1) and parallel to the extending direction thereof, and in the torsion transmission mechanism The rolling elements are embedded in the guide grooves. 8. The portable inflator according to claim 5, characterized in that: the anti-twist structure comprises a plurality of guide grooves formed on the inner wall of the casing (1) parallel to its extension direction and rolling embedded in the Balls or needles in the guide grooves, the balls or needles are defined in defined holes or grooves formed on the side walls of the piston (3). 9. The portable inflator according to any one of claims 1-4, characterized in that: a battery for supplying power to a motor is arranged in the casing (1), and the axis of the battery is at least the axis of the motor. parallel. 10. The portable inflator according to any one of claims 1-4, characterized in that: the circuit board of the housing (1) is parallel to or coaxial with the axis of the motor.

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