An electromagnetic piston air pump for human body massager

Abstract

An electromagnetic piston air pump for a human body massager includes: a tympanic membrane, a one-way valve, and an air chamber. The tympanic membrane is in contact with the bottom plate of the air chamber, and the tympanic membrane can be close to or away from the bottom plate of the air chamber. At least two airflow areas are divided on the bottom plate of the air chamber, and through holes and airflow holes are provided on the airflow areas. The one-way valve includes a valve head and a valve stem, and the valve stem passes through the through hole. At least one valve head is provided on each of the two end surfaces of the bottom plate of the air chamber. At least one air leakage groove is provided on the airflow area of ​​the bottom plate of the air chamber, and the air leakage groove is connected to the airflow hole. The air leakage grooves on the two airflow areas are respectively located on one end surface of the bottom plate of the air chamber close to the tympanic membrane and one end surface of the bottom plate of the air chamber away from the tympanic membrane. The valve head covers the airflow hole and a part of the air leakage groove, and the other part of the air leakage groove is located on the outside of the valve head. The air pump of the present application has a simple structure and low cost, and can be realized only by providing an air leakage groove. In the process of inflating or exhausting air to the air chamber or neither exhausting air nor inflating air, the gas can always flow in both directions.

Description

Technical Field

[0001] The present application relates to the technical field of massage and health care equipment, and in particular to an electromagnetic piston air pump for a human body massager. Background Art

[0002] The main components of the existing electromagnetic piston air pump are composed of winding coils, magnets, magnetic cores, swinging parts, air chambers and other parts. The working principle is: when an alternating current is provided to the coil, the alternating current will cause the coil to generate a changing magnetic field, and the magnet will be pushed under the action of the magnetic field force. Since the direction of the magnetic field force changes with the direction of the current, the swinging part embedded in the magnet will swing back and forth at the same frequency as the alternating current, and the swinging part is forked to connect the tympanic membrane, so that the tympanic membrane continuously inflates or exhausts the air chamber. There will be two one-way valves in the air chamber, which will make the air flow flow only in the specified direction, so as to achieve the purpose of the air pump being able to continuously inflate or exhaust the container.

[0003] In many usage scenarios, electromagnetic pumps are used to inflate or exhaust containers. When inflating, the gas can only flow in the inflation direction, and when exhausting, it can only flow in the exhaust direction. Since the air flow cannot flow in both directions, the air pressure value in the container must be controlled by a control valve during the process of the air pump inflating or exhausting the container. In many products, adding a control valve means increasing costs, and adding a control valve will also increase the size of the product. Moreover, most control valves have high working temperatures and loud switching sounds, which will also affect the product inspection experience. Summary of the invention

[0004] The present application provides an electromagnetic piston air pump for a human body massager, the main purpose of which is to achieve reverse flow of the one-way valve airflow in the air pump without increasing the cost.

[0005] In one embodiment of the present application, an electromagnetic piston air pump for a human body massager is provided, comprising: a tympanic membrane, a one-way valve, and an air chamber;

[0006] The eardrum is in contact with the bottom plate of the air chamber, and the eardrum can squeeze or expand the space between the eardrum and the bottom plate of the air chamber; the bottom plate of the air chamber is divided into at least two airflow areas, and a through hole and a plurality of airflow holes are provided on the airflow area; the one-way valve includes a valve head and a valve stem, and the valve stem passes through the through hole; at least one valve head is respectively provided on an end surface of the bottom plate of the air chamber close to the eardrum and an end surface of the bottom plate of the air chamber away from the eardrum;

[0007] At least one air leakage groove is provided on the air flow area of ​​the air chamber bottom plate, and the air leakage groove is connected with the air flow hole; the air leakage grooves on the two air flow areas are respectively located on one end surface of the air chamber bottom plate close to the tympanic membrane and one end surface of the air chamber bottom plate away from the tympanic membrane; the valve head covers the air flow hole and a part of the air leakage groove, and the other part of the air leakage groove is located on the outside of the valve head.

[0008] In one embodiment, the eardrum and the one-way valve are both made of rubber.

[0009] In one embodiment, the one-way valve is an umbrella-shaped one-way valve.

[0010] In one embodiment, the thickness of the valve head gradually decreases from the connection between the valve head and the valve stem to the edge of the valve head.

[0011] In one embodiment, a first limit block is provided on the valve stem.

[0012] In one embodiment, a second limit block is provided at the connection between the valve head and the valve stem, and the second limit block is located between the valve head and the bottom plate of the air chamber.

[0013] In one embodiment, a boss is provided on the air flow area of ​​the air chamber bottom plate close to one end surface of the tympanic membrane and / or away from one end surface of the tympanic membrane; a through hole and a plurality of air flow holes are provided on the boss, and the air leakage groove is provided on the surface of the boss.

[0014] In one embodiment, the electromagnetic piston air pump also includes a base, the air chamber is fixed on both sides of the base, and the magnetic core, coil winding and swinging member are fixed on the base; the eardrum is fixed on both ends of the swinging member, and the eardrum is in contact with the air chamber; the swinging member can swing between the air chambers on both sides to make the eardrum approach or move away from the air chamber; and a magnetic member with opposite magnetism is fixed on the eardrum.

[0015] In one embodiment, the air chamber is provided with a first vent hole and a second vent hole, the first vent hole is used to connect to the external air pressure, an air pipe is fixed between the air chambers on both sides, and both ends of the air pipe are respectively connected to the second vent holes on the air chambers on both sides.

[0016] In one embodiment, the electromagnetic air pump further includes a connecting member, one end of which is fixed to the base, and the other end of which is connected to the swinging member.

[0017] According to the electromagnetic piston air pump for human massager in the above embodiment, since the leakage groove is set on the air flow area, the one-way valve can close the air flow area to prevent the air flow from flowing, or the air flow area at the one-way valve can flow normally, and the air flow hole connected to the leakage groove can always realize the flow of gas in the air chamber and the gas formed in the space between the bottom plate of the air chamber and the tympanic membrane. That is, when the air pump of the present application adjusts the air pressure inside the air chamber, the gas on the air flow hole is no longer a one-way flow. When one air flow area flows the gas in one direction, the air flow hole connected to the leakage groove on the other air flow area can still flow the gas. When the tympanic membrane inflates or exhausts the air chamber to adjust the air pressure of the air chamber, the air flow hole connected to the leakage groove can flow a small part of the gas in the opposite direction. The gas flowing through the leakage groove will interfere with the flow trajectory of the gas inside the air pump, change the linear trajectory, and make the blown gas softer. The air pump of the present application has a simple structure, is easy to process, and has low cost. It can be realized by only opening the leakage groove. In the process of inflating or exhausting the air chamber, the gas can flow in both directions, and the noise is small. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the explosion structure of an electromagnetic piston air pump used in a human massager in one embodiment of the present application;

[0019] Figure 2 This is a schematic diagram of the internal structure of an electromagnetic piston air pump used in a human massager in one embodiment of the present application;

[0020] Figure 3 This is a schematic diagram of the cross-sectional structure of an electromagnetic piston air pump used in a human body massager in one embodiment of the present application;

[0021] Figure 4 This is a schematic diagram of the air chamber structure in one embodiment of the present application;

[0022] Figure 5 This is a schematic diagram of the air chamber structure from another perspective in an embodiment of the present application;

[0023] Figure 6 This is a schematic diagram of the structure of a swinging member and a tympanic membrane in one embodiment of the present application;

[0024] Figure 7 This is a schematic diagram of the structure of the eardrum in one embodiment of the present application;

[0025] Figure 8 This is a schematic diagram of the one-way valve structure in one embodiment of the present application;

[0026] Fig. 9 for Figure 3 Enlarged structural diagram at A in the middle. DETAILED DESCRIPTION

[0027] The present application is further described in detail below by specific embodiments in conjunction with the accompanying drawings. Wherein similar elements in different embodiments adopt associated similar element numbers. In the following embodiments, many detailed descriptions are intended to enable the present application to be better understood. However, those skilled in the art can easily recognize that some of the features can be omitted in different situations, or can be replaced by other elements, materials, and methods. In some cases, some operations related to the present application are not shown or described in the specification, in order to avoid the core part of the present application being overwhelmed by too much description, and for those skilled in the art, it is not necessary to describe these related operations in detail, and they can fully understand the related operations based on the description in the specification and the general technical knowledge in the art.

[0028] In addition, the features, operations or characteristics described in the specification can be combined in any appropriate manner to form various implementations. At the same time, the steps or actions in the method description can also be interchanged or adjusted in a manner that is obvious to those skilled in the art. Therefore, the various sequences in the specification and the drawings are only for the purpose of clearly describing a certain embodiment and are not meant to be a required sequence, unless otherwise specified that a certain sequence must be followed.

[0029] The serial numbers of the components in this document, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings).

[0030] like Figure 1-9 As shown, in one embodiment, an electromagnetic piston air pump for a human body massager includes: a tympanic membrane 6, a one-way valve 7, and an air chamber 8.

[0031] The eardrum 6 is in contact with the bottom plate of the air chamber, and the eardrum 6 can squeeze or expand the space between the eardrum 6 and the bottom plate of the air chamber. The bottom plate of the air chamber is divided into at least two air flow areas, and a through hole and a plurality of air flow holes are provided on the air flow area. The one-way valve 7 includes a valve head and a valve stem, and the valve stem passes through the through hole. At least one valve head is provided on one end surface of the bottom plate of the air chamber close to the eardrum 6 and one end surface of the bottom plate of the air chamber away from the eardrum 6.

[0032] At least one leakage groove 84 is provided on the airflow area of ​​the air chamber bottom plate, and the leakage groove 84 is connected to the airflow hole. The leakage grooves 84 on the two airflow areas are respectively located on one end surface of the air chamber bottom plate close to the tympanic membrane 6 and one end surface of the air chamber bottom plate away from the tympanic membrane 6. The valve head covers the airflow hole and a part of the leakage groove 84, and the other part of the leakage groove 84 is located outside the valve head.

[0033] like Figure 4-5 As shown in FIG, the air chamber bottom plate is a plate with a certain thickness. Figure 6-7As shown, the eardrum 6 on the side in contact with the air chamber 8 is in a concave bowl shape. The air chamber bottom plate has two end surfaces, one of which is close to the eardrum 6, and the other end is away from the eardrum 6. When the eardrum 6 and the air chamber bottom plate are in contact, a relatively closed space is formed. The air chamber side wall is fixed to the end surface of the air chamber bottom plate away from the eardrum 6, and a space is formed by removably covering the end of the air chamber side wall away from the air chamber bottom plate with an air chamber cover 9, or the air chamber cover 9 can be directly fixed to the air chamber side wall. The detachable installation method is relatively more convenient to assemble and replace internal components, such as replacing the one-way valve 7. The airflow holes on the airflow area of ​​the air chamber bottom plate can be connected to the space between the two end surfaces of the air chamber bottom plate.

[0034] The bottom plate of the air chamber is divided into two airflow areas, and a one-way valve 7 is arranged on each airflow area. The valve head of the one-way valve 7 in one airflow area is close to the tympanic membrane 6, and the valve head of the one-way valve 7 in the other airflow area is arranged away from the tympanic membrane 6.

[0035] The valve head arranged on the side of the tympanic membrane 6 is in contact with the airflow area under normal circumstances, covering the airflow hole, so that the airflow hole cannot flow in or out of the gas. When the tympanic membrane 6 is close to the air chamber 8, the space between the tympanic membrane 6 and the bottom plate of the air chamber becomes smaller, the valve head of the one-way valve 7 arranged on the side of the tympanic membrane 6 is in closer contact with the airflow area, and the airflow hole cannot be ventilated. The valve head of the one-way valve 7 arranged on the side away from the tympanic membrane 6 moves toward the side away from the tympanic membrane 6, and the airflow hole there can flow the gas in the space between the tympanic membrane 6 and the bottom plate of the air chamber into the air chamber 8. When the tympanic membrane 6 is away from the air chamber 8, the space between the tympanic membrane 6 and the bottom plate of the air chamber becomes larger, the valve head of the one-way valve 7 arranged on the side away from the tympanic membrane 6 is in closer contact with the airflow area, and the airflow hole cannot be ventilated. The valve head of the one-way valve 7 arranged on the side of the tympanic membrane 6 moves toward the side close to the tympanic membrane 6, and the airflow hole there can flow the gas in the air chamber 8 into the space between the tympanic membrane 6 and the bottom plate of the air chamber. That is, the one-way valve 7 with the valve head located on one side of the tympanic membrane 6 is equivalent to the outlet valve of the air chamber 8, and the one-way valve 7 with the valve head located on the side away from the tympanic membrane 6 is equivalent to the inlet valve of the air chamber 8. The valve heads on both end surfaces of the air chamber bottom plate respectively cover a portion of at least one leakage groove 84. Because of the existence of the leakage groove 84, which is connected to the air flow hole, even when the air inlet valve or the air outlet valve is in the state of closing the air flow hole, the air flow hole connected to the leakage groove 84 can still flow in or out of the gas, and the air flow hole not connected to the leakage groove 84 will be closed.

[0036] The electromagnetic piston air pump for a human massager in the above-mentioned embodiment of the present application, hereinafter referred to as the air pump, is provided with a leakage groove 84 on the airflow area, so that no matter the one-way valve 7 closes the airflow area to prevent the airflow from flowing, or the airflow in the airflow area at the one-way valve 7 can flow normally, the airflow holes connected to the leakage groove 84 can always realize the flow of gas in the air chamber 8 and the gas in the space formed between the bottom plate of the air chamber and the tympanic membrane 6. That is, when the air pump of the present application adjusts the internal air pressure of the air chamber 8, the gas in the airflow holes is no longer a one-way flow. When one airflow area flows gas in one direction, the airflow holes in another airflow area connected to the leakage groove 84 can still flow gas. A general electromagnetic piston air pump for a human massager, such as Figure 2 As shown, the arrow on the dotted line is the flow direction of the gas, and the flow trajectory of the gas is approximately linear. In the present application, when the eardrum 6 inflates or exhausts the air chamber 8 to adjust the air pressure of the air chamber 8, the air flow hole connected to the leakage groove 84 can circulate a small part of the gas in the opposite direction, and the gas circulated by the leakage groove 84 will interfere with the flow trajectory of the gas inside the air pump, changing the linear trajectory, so that the blown gas is softer. It is equivalent to the principle that the wind blowing in a spiral or curved direction is softer than the wind blowing directly onto the human body. The air pump of the present application has a simple structure, is easy to process, and has low cost. It can be achieved by only providing the leakage groove 84. In the process of inflating or exhausting the air chamber 8, the gas can flow in both directions, and the noise is relatively small.

[0037] The amount of gas that can flow through the air holes connected to the leakage grooves 84 can be adjusted according to the needs by opening the number of leakage grooves 84, the size of the leakage grooves 84, etc. For example, when a larger amount of leakage is required, multiple leakage grooves 84 can be opened, and one leakage groove 84 corresponds to one air hole. When a smaller amount of leakage is required, an appropriate number of leakage grooves 84 can be blocked by fillers, for example, rubber strips are selected to fill individual leakage grooves 84 to achieve a smaller amount of leakage.

[0038] In one embodiment, the eardrum 6 and the one-way valve 7 are both made of rubber. EPDM rubber is more preferred because it is not easily affected by the environment and has better stability. It has good flexibility and hardness regardless of high or low temperatures. The electromagnetic piston air pump for a human body massager is, for example, an electromagnetic piston air pump for a human body massager of a male function enhancer.

[0039] like Figure 8-9As shown, in one embodiment, the one-way valve 7 is an umbrella-shaped one-way valve, and the head of the one-way valve 7 is umbrella-shaped. In other embodiments, the valve head can also be conical. Compared with the flat valve head, the umbrella-shaped or conical valve head has a smaller contact area with the airflow area on the bottom plate of the air chamber. Under the premise of meeting the airtightness, it is convenient to move the valve head toward or away from the tympanic membrane 6 with a smaller force. From the connection between the valve head and the valve stem to the edge of the valve head, the thickness of the valve head gradually decreases. When the one-way valve 7 is made of EPDM rubber, the thickness edge of the valve head gradually becomes thinner, which helps to better deform, better fit the surface of the airflow area, and help the airtightness of the airflow hole on the airflow area. A first limit block 71 is set on the valve stem. When the valve stem moves in the through hole, the valve stem of the one-way valve 7 is prevented from being separated from the through hole, so as to better ensure the operation of the air pump. A second limit block 72 is set at the connection between the valve head and the valve stem, and the second limit block 72 is between the valve head and the bottom plate of the air chamber. If the second stopper 72 is not provided, the surface contact between the valve head and the airflow area becomes increasingly close under the squeezing action of the tympanic membrane 6. Even if the valve head is umbrella-shaped, under the condition of large force, the side of the umbrella-shaped valve head close to the airflow area can be completely attached to the airflow area. Thus, when separating the valve head from the airflow area, a large adsorption force needs to be overcome. By providing the second stopper 72, the distance between the top of the umbrella-shaped one-way valve and the airflow area can be controlled, which facilitates the separation of the valve head and the airflow area in the later stage.

[0040] like Figure 4-5 As shown, in one embodiment, a boss 83 is provided on the airflow area of ​​one end surface of the air chamber bottom plate close to the tympanic membrane 6 and / or away from the tympanic membrane 6. For example, the boss 83 is provided on the airflow area of ​​one end surface of the air chamber bottom plate close to the tympanic membrane 6 and away from the tympanic membrane 6. A through hole and a plurality of airflow holes are provided on the boss 83, and a leakage groove 84 is provided on the surface of the boss 83. The through hole and the airflow hole connect the spaces at both ends of the air chamber bottom plate. The spaces at both ends refer to the space formed between the tympanic membrane 6 and the air chamber bottom plate, and the space of the air chamber 8 on the other side of the air chamber bottom plate. The amount of leakage can be adjusted by adjusting the height of the boss 83 and the size and number of the leakage grooves 84. The boss 83 is provided to facilitate the flow of gas on the leakage grooves 84.

[0041] In other embodiments, in addition to providing the leakage groove 84 on the boss 83, the boss 83 may not be provided, and leakage holes may be provided in other areas on the bottom plate of the air chamber, and the leakage holes connect the spaces at both ends of the bottom plate of the air chamber. Local leakage is achieved through the air holes, so that when the one-way valve 7 is inflated or evacuated in one direction, the leakage holes can flow gas in the opposite direction to adjust the air pressure of the air chamber 8. The material of the air chamber 8 is mostly rubber, and a leakage hole is provided on it. As the use time increases, the leakage hole will become larger, and the leakage amount will become larger and larger, which is uncontrollable and may even affect the size of the internal air pressure of the air chamber 8. A metal plate can be fixed on the bottom plate of the air chamber, and corresponding leakage holes can be provided on the metal plate and the adjacent bottom plate of the air chamber to better ensure that the leakage amount of the leakage holes is uniform. However, the provision of a metal plate will increase the cost of the air pump.

[0042] In one embodiment, the air pump further includes a base 2 and an upper shell 1 of the pump body, and air chambers 8 are fixed on both sides of the base 2, and a magnetic core 3, a coil winding 4 and a swinging member 5 are fixed on the base 2. In order to increase the air pump's pumping efficiency, the air pump is generally equipped with two or more air chambers, and the specific number is set according to actual needs. The upper shell 1 of the pump body covers the base 2 to protect the internal components of the air pump. The air pump leads out a wire 11 from the upper shell 1 of the pump body, and the wire 11 is used for power supply. The eardrum 6 is fixed at both ends of the swinging member 5, and the eardrum 6 is in contact with the air chamber 8. The swinging member 5 can swing between the air chambers 8 on both sides to make the eardrum 6 approach or move away from the air chamber 8. The first magnetic member 51 and the second magnetic member 52 with opposite magnetism are fixed on the eardrum 6. The first magnetic member 51 and the second magnetic member 52 are made of strong magnet materials, and the magnetic core 3 is made of silicon steel sheets or iron, silicon, aluminum, zinc and other sheets.

[0043] The alternating current input wire 11, such as 50Hz alternating current, generates electromagnetic induction through the winding coil and the magnetic part, and the magnetic force drives the swinging part 5 to swing left and right, so that the eardrum 6 at one end is close to the air chamber 8 on the near side for inflation, and the eardrum 6 at the other end is away from the air chamber 8 on the near side for evacuation, so as to generate air flow inside the air chamber 8 on both sides of the base 2. The air flow value and the air pressure value can be adjusted by adjusting the leakage groove 84. The higher the boss 83 is, that is, the thicker it is, the larger the leakage groove 84 can be excavated. Under the premise of not changing the leakage groove 84, it can also be achieved by changing the current size and frequency of the air pump power supply. For example, when the current is large, the eardrum squeezes or pulls the bottom plate of the air chamber with a larger force, generating a higher atmospheric pressure, and the corresponding leakage groove 84 will have a faster airflow, thereby achieving the purpose of adjusting the air pressure of the air chamber.

[0044] In one embodiment, the air chamber 8 is provided with a first vent 81 and a second vent 82, the first vent 81 is used to communicate with the external air pressure, and an air pipe 10 is fixed between the air chambers 8 on both sides of the base 2, and both ends of the air pipe 10 are respectively communicated with the second vents 82 on the air chambers 8 on both sides. Figure 2As shown, when the first vent 81 on one side of the air chamber 8 is used for air intake, the first vent 81 on the other side of the air chamber 8 is used for air outlet, and the air intake and outlet of the two can also be switched without restriction. The arrow on the dotted line indicates the flow direction of the gas inside the air pump, which is generally a linear flow. However, when the air pump of the present application is used, under the action of the tympanic membrane 6, the air chamber 8 is evacuated or inflated to change the air pressure inside the air chamber 8, and the gas flow in the opposite direction can be achieved through the air leakage groove 84, so as to better control the air pressure inside the air chamber 8 and the trajectory of the gas flow.

[0045] like Figure 6 As shown, in one embodiment, the air pump further includes a connecting member 12, one end of which is fixed to the base 2, and the other end is connected to the swinging member 5. The connecting member 12 is provided to ensure the swinging amplitude of the swinging member 5, and to avoid excessive amplitude, so that the eardrum 6 over-compresses the air chamber 8. The eardrum 6 is specifically made of EPDM rubber.

[0046] The above specific examples are used to illustrate the present application, which is only used to help understand the present application and is not intended to limit the present application. For technicians in the technical field to which the present application belongs, they can also make some simple deductions, deformations or substitutions based on the ideas of the present application.

Claims

1. An electromagnetic piston air pump for a human body massager, characterized in that: include: Tympanic membrane, one-way valve, and air chamber; The eardrum is in contact with the bottom plate of the air chamber, and the eardrum can squeeze or expand the space between the eardrum and the bottom plate of the air chamber; the bottom plate of the air chamber is divided into at least two airflow areas, and a through hole and a plurality of airflow holes are provided on the airflow area; the one-way valve includes a valve head and a valve stem, and the valve stem passes through the through hole; at least one valve head is respectively provided on an end surface of the bottom plate of the air chamber close to the eardrum and an end surface of the bottom plate of the air chamber away from the eardrum; At least one air leakage groove is provided on the air flow area of ​​the air chamber bottom plate, and the air leakage groove is connected with the air flow hole; the air leakage grooves on the two air flow areas are respectively located on one end surface of the air chamber bottom plate close to the eardrum and one end surface of the air chamber bottom plate away from the eardrum; the valve head covers the air flow hole and a part of the air leakage groove, and the other part of the air leakage groove is located on the outside of the valve head; The electromagnetic piston air pump also includes a base, the air chamber is fixed on both sides of the base, a magnetic core, a coil winding and a swinging member are fixed on the base; the eardrum is fixed on both ends of the swinging member, and the eardrum is in contact with the air chamber; the swinging member can swing between the air chambers on both sides to make the eardrum approach or move away from the air chamber; a magnetic member with opposite magnetism is fixed on the eardrum; The air chamber is provided with a first vent hole and a second vent hole, the first vent hole is used to communicate with the external air pressure, an air pipe is fixed between the air chambers on both sides, and both ends of the air pipe are respectively communicated with the second vent holes on the air chambers on both sides.

2. The electromagnetic piston air pump for a human body massager according to claim 1, characterized in that: The eardrum and the one-way valve are both made of rubber.

3. The electromagnetic piston air pump for a human body massager according to claim 2, characterized in that: The one-way valve is an umbrella-shaped one-way valve.

4. The electromagnetic piston air pump for a human body massager as claimed in claim 3, characterized in that: The thickness of the valve head gradually decreases from the connection between the valve head and the valve stem to the edge of the valve head.

5. The electromagnetic piston air pump for a human body massager according to claim 4, characterized in that: A first limiting block is arranged on the valve stem.

6. The electromagnetic piston air pump for a human body massager according to claim 4, characterized in that: A second limit block is arranged at the connection between the valve head and the valve stem, and the second limit block is located between the valve head and the bottom plate of the air chamber.

7. The electromagnetic piston air pump for a human body massager according to claim 1, characterized in that: A boss is provided on the airflow area of ​​the air chamber bottom plate close to one end surface of the eardrum and / or away from one end surface of the eardrum; a through hole and a plurality of airflow holes are provided on the boss, and the air leakage groove is provided on the surface of the boss.

8. The electromagnetic piston air pump for a human body massager according to claim 1, characterized in that: The electromagnetic piston air pump also includes a connecting piece, one end of which is fixed on the base, and the other end of which is connected to the swinging piece.

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