Air pump structure, sucking massage device and light licking massage device

Abstract

The utility model relates to the technical field of air pumps, and discloses an air pump structure, a sucking massage device and a light licking massage device.The air pump structure comprises a pump body, a piston and a driving assembly, the pump body is provided with a movable cavity with an air pumping opening and a piston opening which are oppositely arranged, the piston penetrates through the piston opening and is movably arranged in the movable cavity, and the driving assembly is arranged on the piston. The driving assembly comprises a rotor magnet and a coil winding, the rotor magnet is arranged on the piston, the coil winding is wound around the peripheral wall of the pump body and used for driving the rotor magnet to drive the piston to move along the movable cavity when powered on, a coil is powered on to directly drive the piston to move, an intermediate transmission mechanism is omitted, and energy loss caused by the intermediate transmission mechanism can be avoided. Therefore, the efficiency of the air pump is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of air pumps, in particular to an air pump structure, a sucking massage device and a light licking massage device. Background Art

[0002] An air pump is a device that exhausts air from a closed space or adds air to a closed space. In daily life, electric-powered air pumps are commonly used, which continuously compress air through electricity to generate air pressure.

[0003] Generally, the air pump drives the crankshaft through the rotation of the motor, and the crankshaft pushes the piston to achieve the function of inflation or exhaust, or the motor drives the air pump through a transmission mechanism such as a belt or gear. The kinetic energy of the motor is converted through the transmission mechanism and then transferred to the piston of the air pump. Extra energy loss occurs during the conversion process, resulting in reduced efficiency of the air pump and increased energy consumption of the air pump. Among them, the efficiency of the air pump refers to the ratio of the actual power of the air pump to the driving power of the prime mover such as the motor. Utility Model Content

[0004] The main purpose of the utility model is to provide an air pump structure, aiming to reduce the energy loss of the air pump and improve the efficiency of the air pump.

[0005] To achieve the above purpose, the air pump structure proposed by the utility model includes:

[0006] A pump body, wherein the pump body is formed with an active cavity having a pumping port and a piston port disposed oppositely;

[0007] a piston passing through the piston port and movably disposed in the movable chamber; and

[0008] A driving assembly, the driving assembly includes a movable magnet and a coil winding, the movable magnet is arranged on the piston, the coil winding is wound around the outer peripheral wall of the pump body, and is used to drive the movable magnet to drive the piston to move along the active cavity when power is turned on.

[0009] Optionally, the pump body includes a cylinder body and a stator frame;

[0010] The cylinder body and the stator frame are an integral injection-molded structure; the coil winding is wound around the stator frame.

[0011] Optionally, the stator frame is formed with winding slots;

[0012] The coil winding is wound in the winding groove, and the coil winding abuts against the side wall of the winding groove.

[0013] Optionally, the stator frame is formed with at least two winding slots, and the drive assembly includes at least two coil windings;

[0014] One coil winding is correspondingly wound in one winding slot, and the winding directions of the coil windings in two adjacent winding slots are opposite.

[0015] Optionally, the pump body further comprises a pump head;

[0016] The pump head is detachably connected to an end of the cylinder body away from the stator frame;

[0017] The pump air port is opened on the pump head.

[0018] Optionally, one of the pump head and the cylinder body is provided with a clamping protrusion, and the other of the pump head and the cylinder body is provided with a clamping groove;

[0019] The clamping protrusion is clamped and matched with the clamping slot.

[0020] Optionally, the card slot has a guide opening portion and a card slot portion;

[0021] The guide port is located at one end of the cylinder body away from the stator frame and is arranged toward the pump head. The snap-fit ​​groove is connected with the guide port along the circumference of the cylinder body and is spaced apart from the end face of the cylinder body away from the stator frame. The snap-fit ​​protrusion is snap-fitted with the snap-fit ​​groove.

[0022] Optionally, the pump head is provided with a limit stopper; the limit stopper abuts against the end surface of the cylinder body facing away from the stator frame, and the limit stopper is used to block and limit the piston.

[0023] Optionally, the air pump structure further includes a buffer spring;

[0024] The buffer spring is arranged in the active cavity, and two ends of the buffer spring are respectively in contact with the movable magnet and a cavity wall of the active cavity opposite to the pump head.

[0025] Optionally, the piston includes a mounting section and a pushing section, and the air pump structure also includes a sealing ring;

[0026] The push section is connected to one end of the installation section away from the coil winding, and an annular groove is formed on the push section. The sealing ring is sleeved in the annular groove and partially protrudes from the notch of the annular groove. The outer peripheral wall of the sealing ring abuts against the cavity wall of the active cavity.

[0027] The mover magnet is arranged on the installation section.

[0028] The utility model also provides a sucking massage device, comprising:

[0029] The above-mentioned air pump structure, the pump body includes a cylinder body, a pump head and a stator frame, the cylinder body is connected to the stator frame, the pump head is connected to the end of the cylinder body away from the stator frame and is formed with a sucking hole, the sucking hole is connected to the space in the active cavity located on the side of the piston facing away from the stator frame, so as to change the volume of the sucking hole and the part of the active cavity connected to the sucking hole when the piston moves;

[0030] Wherein, the pump head is a flexible part.

[0031] The utility model also provides a light licking massage device, comprising:

[0032] The above-mentioned air pump structure, the pump body includes a cylinder body, a pump head and a stator frame, the cylinder body is connected to the stator frame, the pump head is connected to one end of the cylinder body away from the stator frame and extends into the active cavity, and the pump head is formed with a suction groove with a notch facing away from the piston;

[0033] A swinging member connected to the sucking groove and extending from the inner part of the sucking groove through the bottom of the sucking groove to the outer side of the sucking groove;

[0034] A transmission assembly, the transmission assembly comprising a first transmission member and a second transmission member which are rotatably connected, the first transmission member being connected to the piston and being offset from the axis of the piston, and the second transmission member being connected to the swing member;

[0035] Wherein, the pump head is a flexible member, and when the piston moves, it can compress or relax the space in the suction groove and drive the swinging member to swing.

[0036] In the technical solution of the utility model, by energizing the coil windings wound around the outer peripheral wall of the pump body, a force is generated on the movable magnet, driving the movable magnet to move in the active cavity, and then the movable magnet drives the piston to move in the active cavity, pushing the gas in the active cavity to be discharged from the pump air port or sucking air into the active cavity from the pump body port, thereby realizing the function of the air pump. During the working process of the above-mentioned air pump, the coil is energized to directly drive the piston to move, without an intermediate transmission mechanism, which can avoid the energy loss caused by the intermediate transmission mechanism, thereby improving the efficiency of the air pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0038] Figure 1A schematic structural diagram of an embodiment of the air pump structure provided by the utility model;

[0039] Figure 2 for Figure 1 A schematic diagram of a structural breakdown of an embodiment of the invention;

[0040] Figure 3 for Figure 1 A cross-sectional schematic diagram of an embodiment in;

[0041] Figure 4 This is a schematic diagram of the structure of the sucking massage device provided by the utility model;

[0042] Figure 5 It is a structural schematic diagram of the light licking massage device provided by the utility model.

[0043] Description of Figure Numbers:

[0044] Label name Label name 1000 Air pump structure 22 Push section 1 Pump body 221 Ring groove 1a Activity cavity 3 Drive components 11 Cylinder 31 Mover magnet 111 Card slot 32 Coil Winding 1111 Guide mouth 4 Ring spacer 1112 Card slot 5 Buffer spring 112 Piston port 6 Sealing ring 12 Stator frame 2000 Sucking massage device 121 Winding slot 201 Sucking hole 13 Pump head 3000 Licking massage device 131 Snap-on protrusion 301 Sucking trough 132 Limit stop 302 Swinging parts 133 Pump air port 303 Transmission components 132 Limit stop 3031 First transmission member 2 piston 3032 Second transmission member 21 Installation section

[0045] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0046] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0047] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0048] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0049] The utility model provides an air pump structure 1000. Figures 1 to 3 This is an embodiment of the present utility model.

[0050] In the embodiment of the utility model, the air pump structure 1000 is as follows Figures 1 to 3 As shown, it includes a pump body 1, a piston 2 and a driving assembly 3, the pump body 1 is formed with an active chamber 1a having a pump air port 133 and a piston port 112 arranged relatively to each other, the piston 2 passes through the piston port 112 and is movably arranged in the active chamber 1a, the driving assembly 3 includes a movable magnet 31 and a coil winding 32, the movable magnet 31 is arranged on the piston 2, the coil winding 32 is wound around the outer peripheral wall of the pump body 1, and is used for driving the movable magnet 31 to drive the piston 2 to move along the active chamber 1a when power is turned on.

[0051] In the technical solution of the utility model, by energizing the coil winding 32 wound around the outer wall of the pump body 1, a force is generated on the movable magnet 31, driving the movable magnet 31 to move in the active chamber 1a, and then the movable magnet 31 drives the piston 2 to move in the active chamber 1a, pushing the gas in the active chamber 1a to be discharged from the pump air port 133 or sucking air from the pump body 1 into the active chamber 1a, thereby realizing the function of the air pump. During the working process of the above-mentioned air pump, the coil is energized to directly drive the piston 2 to move, without an intermediate transmission mechanism, which can avoid the energy loss caused by the intermediate transmission mechanism, thereby improving the efficiency of the air pump.

[0052] In order to reduce the noise generated by the air pump structure 1000 during use, in one embodiment, the pump body 1 includes a cylinder body 11 and a stator frame 12, and the cylinder body 11 and the stator frame 12 are an integral injection molding structure. The coil winding 32 is wound around the stator frame 12. The integral molding makes it unnecessary for the cylinder body 11 and the stator frame 12 to be assembled secondary, and can be directly injection molded, which not only reduces the cost but also ensures a high coaxiality between the two, thereby reducing the collision and scraping between the piston 2 and the inner wall of the active chamber 1a, and reducing the noise generated by the air pump structure 1000 during use.

[0053] In order to improve the driving effect of the driving component 3, in one embodiment, the stator frame 12 is formed with a winding groove 121, and the coil winding 32 is wound in the winding groove 121, and the coil winding 32 is abutted against the side wall of the winding groove 121, that is, the coil winding 32 is wound in the winding groove 121 and limited by the side wall of the winding groove 121. The winding groove 121 makes the distance between the coil winding 32 and the movable magnet 31 closer, and the driving effect is better.

[0054] There are two ways to change the movement direction of the piston 2, namely, changing the direction of the current connected to the coil winding 32 and changing the winding direction of the coil winding 32. Since the piston 2 of the cylinder structure reciprocates frequently, it is not convenient to frequently change the direction of the current connected to the coil winding 32 and change the winding direction of the coil winding 32. In order to facilitate the reciprocating motion of the piston 2, in one embodiment, the stator frame 12 is formed with at least two winding grooves 121, and the drive component 3 includes at least two coil windings 32, one of the coil windings 32 is correspondingly wound in one of the winding grooves 121, and the winding directions of the coil windings 32 in two adjacent winding grooves 121 are opposite, that is, by setting at least two winding grooves 121 and reversely winding the coil windings 32 in the adjacent winding grooves 121 in advance, then during the operation of the air pump structure 1000, it is only necessary to switch the power supply to the coil windings 32 with different winding directions to change the movement direction of the piston 2 and realize the reciprocating motion of the piston 2.

[0055] In order to enable the air pump structure 1000 to have the ability to realize multiple functions, in one embodiment, the pump body 1 also includes a pump head 13, and the pump head 13 is detachably connected to the end of the cylinder body 11 away from the stator frame 12, that is, by replacing different pump heads 13, different functions of the air pump structure 1000 in different application fields can be realized.

[0056] In order to specifically realize the detachable connection between the pump head 13 and the cylinder body 11, in one embodiment, one of the pump head 13 and the cylinder body 11 is provided with a snap-in protrusion 131, and the other of the pump head 13 and the cylinder body 11 is provided with a snap-in groove 111, and the snap-in protrusion 131 is snap-fitted with the snap-in groove 111. The detachable connection between the pump head 13 and the cylinder body 11 is realized by the cooperation and separation of the snap-in protrusion 131 and the snap-in groove 111, and the same snap-in groove 111 or snap-in protrusion 131 only needs to be provided on different pump heads 13, so that different functions can be realized by replacing different pump heads 13.

[0057] The structure that can achieve the snap connection is not unique and is not specifically limited here. In the present embodiment, in order to prevent the pump head 13 from being separated from the cylinder body 11, the snap-in groove 111 has a guide opening 1111 and a snap-in groove 1112. The guide opening 1111 is located at an end of the cylinder body 11 away from the stator frame 12 and is arranged toward the pump head 13. The snap-in groove 1112 is connected to the guide opening 1111 along the circumference of the cylinder body 11 and is away from the stator frame 12. The end faces of the stator frame 12 are arranged at intervals, and the snap-fitting protrusions 131 are snap-fitted with the snap-fitting grooves 1112. When the pump head 13 is matched with the cylinder body 11, it first enters the snap-fitting groove 111 from the end face of the cylinder body 11 away from the stator frame 12 through the guide opening 1111, and then rotates relative to the cylinder body 11, and then snaps into the snap-fitting groove 1112 to achieve snap-fitting, so that the pump head 13 can be prevented from easily coming out along the moving direction of the piston 2. In order to further increase the restriction on the snap-fitting protrusions 131 snapped into the snap-fitting grooves 1112, thereby reducing the possibility of the two being unintentionally disengaged, a limiting protrusion can be provided at the connection between the snap-fitting grooves 1112 and the guide opening 1111, so as to further limit the snap-fitting protrusions 131.

[0058] In order to prevent the piston 2 from rushing out of the stroke range, in one embodiment, the pump head 13 is provided with a limit stop block 132, and the limit stop block 132 is arranged in a ring shape to avoid the pump air port 133. The limit stop block 132 abuts against the end surface of the cylinder body 11 facing away from the stator frame 12. The limit stop block 132 is used to block and limit the piston 2 to prevent the piston 2 from rushing out of the active chamber 1a.

[0059] In order to reduce the noise generated when the piston 2 collides with the limit stop 132 and reduce the damage caused when the two structures collide, in one embodiment, the air pump structure 1000 also includes an annular gasket 4, which is clamped between the limit stop 132 and the end surface of the cylinder body 11 facing away from the stator frame 12, and is used to cushion the collision between the piston 2 and the limit stop 132.

[0060] In order to cushion the piston 2 when it moves in the direction from the cylinder body 11 to the stator frame 12, in one embodiment, the air pump structure 1000 also includes a buffer spring 5, and the buffer spring 5 is arranged in the active chamber 1a, and the two ends of the buffer spring 5 are respectively abutted against the movable magnet 31 and the cavity wall of the active chamber 1a opposite to the pump head 13, that is, when the piston 2 is reset to the cavity wall close to the active chamber 1a opposite to the pump head 13, the buffer spring 5 is used for cushioning, thereby preventing the movable magnet 31 from causing a violent collision with the cavity wall of the active chamber 1a, and reducing the generation of noise.

[0061] To prevent the air pump structure 1000 from leaking, in one embodiment, the piston 2 includes a mounting section 21 and a push section 22, and the air pump structure 1000 also includes a sealing ring 6, wherein the push section 22 is connected to one end of the mounting section 21 away from the coil winding 32, and the push section 22 is formed with an annular groove 221, and the sealing ring 6 is sleeved in the annular groove 221 and partially protrudes from the notch of the annular groove 221, and the outer peripheral wall of the sealing ring 6 abuts against the cavity wall of the active cavity 1a, and the active cavity 1a is sealed by the sealing ring 6, so that during the activity of the piston 2, the gas in the active cavity 1a can only enter and exit from the pump gas port 133, thereby ensuring the sealing performance of the air pump structure 1000 and preventing the occurrence of air leakage. On the other hand, it can assist in positioning the movable magnet 31 and reduce the possibility of friction between it and the cavity wall of the active cavity 1a.

[0062] The utility model also provides a sucking massage device 2000, such as Figure 4 As shown, the sucking massage device 2000 includes the air pump structure 1000, the pump body 1 of the air pump structure 1000 includes a cylinder body 11, a pump head 13 and a stator frame 12, the cylinder body 11 is connected to the stator frame 12, the pump head 13 is connected to the end of the cylinder body 11 away from the stator frame 12 and is formed with a sucking hole 201, the sucking hole 201 is connected to the space in the active chamber 1a located on the side of the piston 2 facing away from the stator frame 12, so as to change the volume of the sucking hole 201 and the part of the active chamber 1a connected to the sucking hole 201 when the piston 2 moves; wherein, the pump head 13 is a flexible member.

[0063] The pump head 13 is a flexible part, and the part thereof located on the end surface of the cylinder body 11 facing away from the stator frame 12 can be in close contact with the skin. When the piston 2 moves along the direction of the stator frame 12 pointing to the cylinder body 11, the space of the active chamber 1a located on the side of the piston 2 facing away from the stator frame 12 is reduced. When the piston 2 moves along the direction of the cylinder body 11 pointing to the stator frame 12, the space of the active chamber located on the side of the piston 2 facing away from the stator frame 12 is increased. When the sucking hole 201 is in close contact or sealed with the skin, the sucking function can be realized to meet the user experience.

[0064] The specific structure of the air pump structure 1000 refers to the above-mentioned embodiments. Since the sucking massage device 2000 adopts all the technical solutions of all the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0065] The utility model also provides a light licking massage device 3000, such as Figure 5As shown, the light licking massage device 3000 includes the air pump structure 1000, a swinging member 302 and a transmission assembly 303. The pump body 1 of the air pump structure 1000 includes a cylinder body 11, a pump head 13 and a stator frame 12. The cylinder body 11 is connected to the stator frame 12. The pump head 13 is connected to one end of the cylinder body 11 away from the stator frame 12 and extends into the active cavity 1a. The pump head 13 is formed with a sucking groove 301 with a notch facing away from the piston 2; the swinging member 302 is connected to the sucking groove 301 and automatically The inner part of the suction groove 301 passes through the bottom of the suction groove 301 to the outer side of the suction groove 301; the transmission assembly 303 includes a first transmission member 3031 and a second transmission member 3032 that are rotatably connected, the first transmission member 3031 is connected to the piston 2 and is offset from the axis of the piston 2, and the second transmission member 3032 is connected to the swing member 302; wherein the pump head 13 is a flexible member, and the piston 2 can compress or relax the space inside the suction groove 301 and drive the swing member 302 to swing when moving.

[0066] When the piston 2 moves toward the pump head 13, the transmission assembly 303 pushes the bottom of the pump head 13 and deforms the pump head 13, squeezing the space in the suction groove 301, and at the same time pushing the swinging member 302 located in the middle of the suction groove 301 to move. Since the first transmission member 3031 and the axis of the piston 2 are offset, that is, eccentrically arranged, the force of the transmission assembly 303 on the swinging member 302 will form a certain angle with the movement direction of the piston 2, thereby achieving the effect of pushing the swinging member 302 to swing. In particular, in order to ensure that the second transmission member 3032 can be stably connected to the pump head 13, a connecting portion is also formed at one end of the pump head 13 facing the piston 2, and the second transmission member 3032 can be stably connected to the connecting portion.

[0067] The specific structure of the air pump structure 1000 refers to the above-mentioned embodiments. Since the light licking massage device 3000 adopts all the technical solutions of all the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0068] The above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the utility model concept, or directly / indirectly used in other related technical fields are included in the patent protection scope of the utility model.

Claims

1. An air pump structure, characterized in that: include: A pump body, wherein the pump body is formed with an active cavity having a pumping port and a piston port disposed oppositely; A piston, the piston passing through the piston port and movably disposed in the movable chamber; as well as A driving assembly, the driving assembly comprising a mover magnet and a coil winding, the mover magnet being arranged on the piston, the coil winding being wound around the outer peripheral wall of the pump body, and being used for driving the mover magnet to drive the piston to move along the active cavity when power is supplied; The pump body comprises a cylinder body and a stator frame; The cylinder body and the stator frame are an integral injection-molded structure; the coil winding is wound around the stator frame; The stator frame is formed with winding slots; The coil winding is wound in the winding groove, and the coil winding abuts against the side wall of the winding groove; The stator frame is formed with at least two winding slots, and the drive assembly includes at least two coil windings; One coil winding is correspondingly wound in one winding slot, and the winding directions of the coil windings in two adjacent winding slots are opposite.

2. The air pump structure according to claim 1, characterized in that: The pump body also includes a pump head; The pump head is detachably connected to an end of the cylinder body away from the stator frame; The pump air port is opened on the pump head.

3. The air pump structure according to claim 2, characterized in that: One of the pump head and the cylinder body is provided with a clamping protrusion, and the other of the pump head and the cylinder body is provided with a clamping groove; The clamping protrusion is clamped and matched with the clamping slot.

4. The air pump structure according to claim 3, characterized in that: The card slot has a guide opening and a card slot; The guide port is located at one end of the cylinder body away from the stator frame and is arranged toward the pump head. The snap-fit ​​groove is connected with the guide port along the circumference of the cylinder body and is spaced apart from the end face of the cylinder body away from the stator frame. The snap-fit ​​protrusion is snap-fitted with the snap-fit ​​groove.

5. The air pump structure according to claim 2, characterized in that: The pump head is provided with a limit stopper; the limit stopper abuts against the end surface of the cylinder body facing away from the stator frame, and the limit stopper is used to block and limit the piston.

6. The air pump structure according to claim 2, characterized in that: The air pump structure also includes a buffer spring; The buffer spring is arranged in the active cavity, and two ends of the buffer spring are respectively in contact with the movable magnet and a cavity wall of the active cavity opposite to the pump head.

7. The air pump structure according to claim 1, characterized in that: The piston includes a mounting section and a pushing section, and the air pump structure also includes a sealing ring; The push section is connected to one end of the installation section away from the coil winding, and an annular groove is formed on the push section. The sealing ring is sleeved in the annular groove and partially protrudes from the notch of the annular groove. The outer peripheral wall of the sealing ring abuts against the cavity wall of the active cavity. The mover magnet is arranged on the installation section.

8. A sucking massage device, characterized in that: include: The air pump structure according to any one of claims 1 to 7, wherein the pump body comprises a cylinder body, a pump head and a stator frame, the cylinder body is connected to the stator frame, the pump head is connected to one end of the cylinder body away from the stator frame and is formed with a sucking hole, the sucking hole is connected to the space in the active cavity located on the side of the piston facing away from the stator frame, so as to change the volume of the sucking hole and the part of the active cavity connected to the sucking hole when the piston moves; Wherein, the pump head is a flexible part.

9. A light licking massage device, characterized in that: include: The air pump structure according to any one of claims 1 to 7, wherein the pump body comprises a cylinder body, a pump head and a stator frame, the cylinder body is connected to the stator frame, the pump head is connected to an end of the cylinder body away from the stator frame and extends into the active cavity, and the pump head is formed with a suction groove with a notch facing away from the piston; A swinging member connected to the sucking groove and extending from the inner part of the sucking groove through the bottom of the sucking groove to the outer side of the sucking groove; A transmission assembly, the transmission assembly comprising a first transmission member and a second transmission member which are rotatably connected, the first transmission member being connected to the piston and being offset from the axis of the piston, and the second transmission member being connected to the swing member; Wherein, the pump head is a flexible member, and when the piston moves, it can compress or relax the space in the suction groove and drive the swinging member to swing.

Images