CN217744990U - Negative pressure generator and negative pressure massager - Google Patents

Abstract

The utility model discloses a negative pressure generator and negative pressure massager, negative pressure generator including have the cavity that adsorbs the mouth, locate piston and drive in the cavity the piston is in reciprocating motion in the cavity with adsorb mouthful department produces the drive arrangement of negative pressure. The utility model provides a negative pressure generator and negative pressure massager can improve the adsorption effect.

Description

Negative pressure generator and negative pressure massager

[ technical field ] A method for producing a semiconductor device

The utility model relates to a massage device field, concretely relates to negative pressure generator and negative pressure massager.

[ background of the invention ]

With the acceleration of life rhythm, the pressure on work of people is increased, and people are tired and have ache all over the body after going through work for one day. In order to relieve fatigue and soreness, people generally use various massagers to massage the body, such as a negative pressure massager. The negative pressure massager relieves fatigue and ache by absorbing and relaxing the skin, thereby achieving the purpose of relieving the body and mind. However, the suction effect of the negative pressure massager in the related art is not good.

Therefore, there is a need for an improved negative pressure massager that avoids the above-mentioned disadvantages.

[ Utility model ] content

An object of the utility model is to provide a can improve the negative pressure generator of adsorption effect and adopt this negative pressure generator's negative pressure massager.

The technical scheme of the utility model as follows:

a negative pressure generator comprises a cavity with an adsorption port, a piston arranged in the cavity and a driving device for driving the piston to reciprocate in the cavity so as to generate negative pressure at the adsorption port.

Preferably, the piston comprises a piston body and a sealing ring arranged on the periphery of the piston body so as to realize sealing between the piston and the cavity wall of the cavity.

Preferably, a sealing groove is formed in the periphery of the piston body, and the sealing ring is embedded in the sealing groove.

Preferably, the sealing washer include with the arc portion that the piston body interval set up and certainly the arc portion is followed two opposite sides in the piston reciprocating motion direction are respectively to extend in the seal groove and form and inlay and locate the fixed part of seal groove, wherein, the arc portion the fixed part reaches the piston body encloses and closes and form the space of collapsing, the arc portion can to the space of collapsing collapses.

Preferably, the negative pressure generator further comprises a massage piece, wherein the massage piece comprises a fixing part fixed on one side of the piston body, which faces the adsorption port, and at least one massage protrusion arranged on one side of the fixing part, which is far away from the piston body.

Preferably, the massage member is integrally formed with the sealing ring, wherein a periphery of the holding portion is connected with the sealing ring.

The piston divides the cavity into a first cavity and a second cavity, the first cavity is communicated with the adsorption port, and the piston comprises a one-way exhaust structure which can be communicated with the first cavity and the second cavity.

Preferably, the one-way exhaust structure comprises an exhaust hole penetrating through the piston body and used for communicating the first cavity with the second cavity, and an exhaust plug fixedly arranged on the piston body and covering one side of the exhaust hole, which is far away from the first cavity.

Preferably, the vent plug comprises a main body part fixedly arranged on one side of the piston main body far away from the adsorption port and a covering part covering the vent hole, and the covering part is made of elastic materials.

Preferably, the vent plug comprises a main body part and a surrounding wall, wherein the main body part is fixedly arranged on one side, far away from the adsorption port, of the piston main body, the main body part is provided with a through hole communicated with the vent hole, the surrounding wall is formed by extending the periphery of the through hole into the second cavity, and the surrounding wall is made of elastic materials and seals the through hole.

Preferably, the cavity comprises a rigid cavity with an opening and a flexible bag body, the piston is arranged in the rigid cavity, the flexible bag body is connected to the opening of the rigid cavity, the flexible bag body is provided with an air passage communicated with the opening, and the air passage forms the adsorption port at one end of the air passage far away from the opening.

Preferably, the rigid cavity comprises a first cavity wall extending along the movement direction of the piston and enclosing to form the opening, and a second cavity wall arranged at one end of the first cavity wall far away from the opening, and a transmission part is movably arranged on the second cavity wall in a penetrating manner and connected with the piston and the driving device.

Preferably, a leakage hole is arranged on the second cavity wall in a penetrating mode.

Preferably, a self-lubricating shaft sleeve is arranged between the transmission piece and the wall of the second cavity.

Preferably, the driving device comprises a transmission assembly and a motor, wherein the motor is connected with the transmission member through the transmission assembly, and the transmission assembly is any one of an eccentric transmission structure, a cam and a ball screw.

Preferably, the transmission assembly comprises an eccentric part and a connecting rod which are in transmission connection, the eccentric part is connected with the motor, and the connecting rod is hinged with the transmission part.

Preferably, the driving device is an electromagnetic actuator including a first magnetic member and a second magnetic member connected to the transmission member, wherein one of the first magnetic member and the second magnetic member includes a coil, and the other of the first magnetic member and the second magnetic member is a magnet, and when the coil is energized, an interaction force between the first magnetic member and the second magnetic member drives the piston to reciprocate.

Preferably, a heating coil or a semiconductor refrigerating sheet is arranged on the periphery of the first cavity wall.

The utility model also provides a negative pressure massager, which comprises any one of the above negative pressure generators.

Compared with the prior art, the utility model provides a negative pressure generator is through setting up the piston in the cavity to through drive arrangement drive piston in order to produce the negative pressure in adsorption port department in cavity reciprocating motion, thereby can improve the adsorption effect.

[ description of the drawings ]

Fig. 1 is an exploded view of a first embodiment of a negative pressure generator provided by the present invention;

FIG. 2 is an assembled schematic view of the negative pressure generator shown in FIG. 1;

FIG. 3 is a cross-sectional view of the negative pressure generator shown in FIG. 2;

FIG. 4 is an enlarged view of a portion a of the negative pressure generator shown in FIG. 3;

fig. 5 is a schematic structural diagram of a partial structure in an embodiment two of the negative pressure generator according to the present invention;

FIG. 6 is a schematic view of the massage member and the sealing ring of the portion of the structure shown in FIG. 5;

fig. 7 is a schematic structural diagram of a third embodiment of the negative pressure generator provided by the present invention;

FIG. 8 is a schematic diagram of a vent plug of the negative pressure generator shown in FIG. 7;

FIG. 9 is an assembled schematic view of the negative pressure generator of FIG. 7;

FIG. 10 is a cross-sectional view of the negative pressure generator shown in FIG. 9;

fig. 11 is a schematic structural diagram of a fourth embodiment of the negative pressure generator according to the present invention;

FIG. 12 is a schematic diagram of a vent plug of the negative pressure generator shown in FIG. 11;

FIG. 13 is a bottom view of the vent plug of FIG. 12;

fig. 14 is a schematic structural view of a massage member and a sealing ring in a negative pressure generator having a one-way air exhaust structure.

[ detailed description ] embodiments

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example one

Referring to fig. 1 to 4, the negative pressure generator includes a chamber 1 having an absorption port 1A, a piston 3 disposed in the chamber 1, and a driving device 5 for driving the piston 3 to reciprocate in the chamber 1 to generate a negative pressure at the absorption port 1A. The piston 3 can divide the cavity 1 into a first cavity 1B and a second cavity 1C, the first cavity 1B is communicated with the adsorption port 1A, when the suction device is used, the adsorption port 1A is attached to a human body, and when the driving device 5 drives the piston 3 to move away from the adsorption port 1A, the first cavity 1B generates negative pressure due to volume increase, so that the negative pressure is generated at the adsorption port 1A.

The cavity 1 comprises a rigid cavity 11 with an opening 11A and a flexible bag body 13, the piston 3 is arranged in the rigid cavity 11, the flexible bag body 13 is connected to the opening 11A of the rigid cavity 11, the flexible bag body 13 is provided with an air passage 13A communicated with the opening 11A, and the air passage 13A is provided with the adsorption port 1A at one end far away from the opening 11A.

In this embodiment, the flexible bladder 13 is integrally formed with the rigid chamber 11. It will be appreciated that in other embodiments, the flexible bladder 13 and the rigid chamber 11 may be connected by gluing or the like.

As shown in fig. 3, the rigid cavity 11 includes a first cavity wall 111 extending along the moving direction of the piston 3 and enclosing to form the opening 11A, and a second cavity wall 113 disposed at an end of the first cavity wall 111 away from the opening 11A, the second cavity wall 113 movably penetrates through the transmission member 7, and the transmission member 7 connects the piston 3 and the driving device 5, so that the driving device 5 drives the transmission member 7 to move to drive the piston 3 to reciprocate in the cavity 1.

As shown in fig. 3, a self-lubricating sleeve 6 is provided between the second cavity wall 113 and the transmission member 7 to allow the transmission member 7 to movably pass through the second cavity wall 113 and reduce the sliding resistance of the transmission member 7.

In this embodiment, the second chamber wall 113 has a leakage hole 115. As shown in fig. 1, the leakage hole 115 is provided in plurality. By providing the leakage hole 115, when the piston 3 moves away from the adsorption port 1A, the second chamber 1C is exhausted to the outside through the leakage hole 115, so that resistance when the piston 3 moves away from the adsorption port 1A can be reduced. Further preferably, the leakage hole 115 penetrates the second chamber wall 113 in the direction of movement of the piston 3.

The piston 3 includes a piston body 31, and a sealing ring 33 disposed on an outer periphery of the piston body 31 to seal between the piston 3 and a cavity wall of the cavity 1 (specifically, the piston 3 and the first cavity wall 111 are sealed by the sealing ring 33).

Wherein, the transmission piece 7 is fixedly connected with the piston body 31.

In this embodiment, a sealing groove 311 is formed on the outer periphery of the piston body 31, and the sealing ring 33 is embedded in the sealing groove 311.

In this embodiment, the sealing ring 33 includes the arc portion 331 that sets up with the piston body 31 interval and certainly the arc portion 331 is followed two opposite sides on the piston 3 reciprocating direction are respectively to extend in the seal groove 311 and form and inlay the fixed part 333 of seal groove 311, wherein, the arc portion 331, the fixed part 333 and the piston body 31 enclose and close and form the space 33A that bursts, the arc portion 331 can to the space 33A that bursts, thereby can avoid the piston 3 the dead problem of card appears when reciprocating in the cavity 1. It will be appreciated that in other embodiments, the seal 33 may be an O-ring, such as a conventional rubber seal, as is conventional in the art.

As shown in fig. 4, the center of curvature of the arc-shaped portion 331 is located toward the crush space 33A.

The driving device 5 comprises a transmission assembly 51 and a motor 53, wherein the motor 53 is connected with the transmission member 7 through the transmission assembly 51, and the transmission assembly 51 may be any one of an eccentric transmission structure, a cam and a ball screw.

In the present embodiment, the transmission assembly 51 is an eccentric transmission structure. The transmission assembly 51 comprises an eccentric part 511 and a connecting rod 513 which are in transmission connection, wherein the eccentric part 511 is connected with the motor 53, and the connecting rod 513 is hinged with the transmission part 7. When the negative pressure generator works, the motor 53 drives the piston 3 to reciprocate in the cavity 1 sequentially through the eccentric part 511, the connecting rod 513 and the transmission part 7.

Example two

Referring to fig. 5 and fig. 6, the difference between the second embodiment and the first embodiment is only: the negative pressure generator further comprises a massage piece 4, the massage piece 4 comprises a fixing part 41 fixed on one side of the piston body 31 facing the adsorption port 1A and a plurality of massage bulges 43 arranged on one side of the piston body 31 far away from the fixing part 41, and at least part of the massage bulges 43 can extend out of the adsorption port 1A. Specifically, when the piston 3 moves to the maximum position of the adsorption port 1A, at least a part of the massage protrusion 43 can extend out of the adsorption port 1A, so that the massage protrusion 43 can massage a human body part to improve a user experience effect.

In the present embodiment, the massage member 4 is integrally formed with the sealing ring 33, wherein the periphery of the holding portion 41 is connected with the sealing ring 33. It is understood that, in other embodiments, the massage member 4 and the sealing ring 33 may be provided as two parts independently (i.e. the massage member 4 is not integrally formed with the sealing ring 33), wherein the holding portion 41 may be fixed to the piston body 31 by gluing.

EXAMPLE III

Referring to fig. 7 to fig. 10, the difference between the third embodiment and the first embodiment is only:

the piston 3 'further comprises a one-way exhaust structure 35 capable of communicating the first chamber 1B and the second chamber 1C, wherein when the piston 3' moves towards the adsorption port 1A, the one-way exhaust structure 35 communicates the first chamber 1B and the second chamber 1C under the action of the air pressure in the first chamber 1B; when the piston 3' moves away from the adsorption port 1A, the one-way exhaust structure 35 blocks the communication between the first chamber 1B and the second chamber 1C under the action of the air pressure in the second chamber 1C. By arranging the one-way exhaust structure 35, the adsorption port 1A can generate negative pressure when the piston 3' moves away from the adsorption port 1A, and the first chamber 1B can exhaust air to the second chamber 1C through the one-way exhaust structure 35 when the piston 3' moves towards the adsorption port 1A, and the second chamber 1C is communicated with the outside, so that resistance when the piston 3' moves towards the adsorption port 1A can be reduced.

The unidirectional exhaust structure 35 includes an exhaust hole 351 penetrating through the piston body 31 for communicating the first chamber 1B and the second chamber 1C, and an exhaust plug 353 fixedly disposed on the piston body 31 and covering a side of the exhaust hole 351 far away from the first chamber 1B, wherein when the piston 3 'moves toward the adsorption port 1A, the exhaust plug 353 opens the exhaust hole 351 under the action of the air pressure in the first chamber 1B to communicate the first chamber 1B with the second chamber 1C, and when the piston 3' moves away from the adsorption port 1A, the exhaust plug 353 closes the exhaust hole 351 under the action of the air pressure in the second chamber 1C to block the communication between the first chamber 1B and the second chamber 1C.

As shown in fig. 8 and 10, the vent plug 353 is substantially in the shape of a ring sheet, and the vent plug 353 can be elastically deformed, for example, the vent plug 353 can be made of a silicone material, so that the vent plug 353 has flexibility and elasticity. Specifically, as shown in fig. 8, the exhaust plug 353 includes a main body portion 355 fixedly disposed on a side of the piston main body 31 away from the suction port 1A, and a covering portion 357 covering the exhaust hole 351, the main body portion 355 has a through hole 356, the covering portion 357 is formed from a part of an inner peripheral edge of the through hole 356 to extend into the through hole 356, and the covering portion 357 is movable in the through hole 356.

When the piston 3' moves away from the suction port 1A, as the volume of the first chamber 1B becomes larger, the air pressure therein decreases (when the difference between the air pressure in the first chamber 1B and the air pressure in the second chamber 1C is not enough to overcome the elastic deformation resistance of the cover 357), the first chamber 1B forms a negative pressure and generates a suction force at the suction port 1A, the cover 357 covers the vent hole 351 to block the communication between the first chamber 1B and the second chamber 1C under the negative pressure, and as the volume of the first chamber 1B continues to increase, the cover 357 also keeps covering the vent hole 351 under the air pressure of the second chamber 1C, thereby maintaining the sealing of the first chamber 1B and the second chamber 1C and maintaining the suction state of the suction port 1A.

When the piston 3 'moves towards the absorption port 1A, firstly, the piston 3' moves to reduce the volume of the first chamber 1B and reduce and eliminate the negative pressure of the first chamber 1B, and then the piston 3 'presses the first chamber 1B, which causes the air pressure in the first chamber 1B to increase, and when the air pressure in the first chamber 1B increases (the air pressure in the first chamber 1B is greater than the air pressure in the second chamber 1C) to overcome the elastic deformation resistance of the covering part 357, the covering part 357 generates elastic deformation under the air pressure in the first chamber 1B to open the exhaust hole 351 and exhaust the air in the first chamber 1B, thereby reducing the movement resistance of the piston 3'.

The main body 355 may be fixedly connected to the piston main body 31 by gluing.

As shown in fig. 7 and 8, the exhaust holes 351 are provided in plural, and accordingly, the through holes 356 and the covering portions 357 are also provided in plural.

In the embodiment, the cavity 11 is provided with a heating coil (9) or a semiconductor refrigerating sheet (9). Specifically, a semiconductor refrigerating sheet 9 is further disposed on the outer periphery of the first cavity wall 111. The semiconductor chilling plate 9 may be disposed such that its hot end is close to the first chamber wall 111, or may be disposed such that its cold end is close to the first chamber wall 111. Therefore, the body temperature of the human body part to the flexible bag body 13 can be adjusted through the semiconductor refrigeration sheet 9, and the massage experience can be improved. It is understood that in other embodiments, the semiconductor chilling plates 9 may be replaced with heating coils 9.

As shown in fig. 1, the seal ring 33' is a conventional O-ring in the prior art, such as a rubber seal ring. It should be noted that, in this embodiment, the sealing ring 33' may also be the sealing ring as shown in the first embodiment (that is, the sealing ring 33' includes an arc portion 331 spaced apart from the piston body 31 and fixing portions 333 extending from the arc portion 331 toward the sealing groove 311 along two opposite sides of the piston 3' in the reciprocating direction and respectively embedded in the sealing groove 311, where the arc portion 331, the fixing portions 333 and the piston body 31 enclose a collapsing space 33A, and the arc portion 331 is collapsible into the collapsing space 33A).

Example four

Referring to fig. 11 to fig. 13, the difference between the fourth embodiment and the third embodiment is: the exhaust plug 353' includes a main body 355' fixed to the side of the piston body 31 away from the suction port 1A, and a surrounding wall 359, the main body 355' has a through hole 356' communicating with the exhaust hole 351, and the surrounding wall 359 extends from the periphery of the through hole 356' into the second chamber 1C.

The wall 359 is made of elastic material, and the wall 359 encloses a passage 358 communicating with the through hole 356', and in a rest state, the wall 359 closes the passage 358 or makes the passage 358 substantially closed (only a slit exists) by its own elasticity.

When the piston 3 ″ moves away from the suction port 1A, as the volume of the first chamber 1B becomes larger, the air pressure therein decreases (when the difference between the air pressure in the first chamber 1B and the air pressure in the second chamber 1C is not enough to overcome the elastic deformation resistance of the enclosing wall 359), the first chamber 1B forms negative pressure and generates suction force at the suction port 1A, the enclosing wall 359 is closed to block the communication between the through hole 356' and the second chamber 1C under the action of the negative pressure, and as the volume of the first chamber 1B continues to increase, the enclosing wall 359 is kept closed under the action of the air pressure of the second chamber 1C.

When the piston 3 "moves towards the suction port 1A, firstly, the piston 3" moves to reduce the volume of the first chamber 1B to reduce and eliminate the negative pressure of the first chamber 1B, and then the piston 3 "presses the first chamber 1B to increase the air pressure in the first chamber 1B, and when the air pressure in the first chamber 1B increases (the air pressure in the first chamber 1B is greater than the air pressure in the second chamber 1C) to overcome the elastic deformation resistance of the enclosing wall 359, the enclosing wall 359 is elastically deformed by the air pressure in the first chamber 1B to open the channel 358, so that the channel 358 communicates the through hole 356 'and the second chamber 1C (i.e., the first chamber 1B and the second chamber 1C communicate with each other through the through hole 356', the channel 358 and the exhaust hole 351).

It should be noted that the one-way exhaust structure is not limited to the one-way exhaust structure shown in the third and fourth embodiments, for example, the one-way exhaust structure may be provided as a one-way valve that penetrates the piston main body 31 and is fixed to the piston main body 31; in the third and fourth embodiments, the exhaust plugs 353 and 353' of the one-way exhaust structure may also be flat-plate exhaust plugs made of a rigid material, and accordingly, the flat-plate exhaust plugs may be connected to the piston main body 31 through springs, when the air pressure in the first chamber 1B increases (the air pressure in the first chamber 1B is greater than the air pressure in the second chamber 1C) to overcome the elastic deformation resistance of the springs, the exhaust plugs of the flat-plate structure open the exhaust holes 351 under the action of the air pressure in the first chamber 1B, and when the piston moves away from the adsorption port 1A, the air pressure in the first chamber 1B decreases due to the increase in volume of the first chamber 1B (when the difference between the air pressure in the first chamber 1B and the air pressure in the second chamber 1C is not sufficient to overcome the elastic deformation resistance of the springs), the exhaust plugs of the flat-plate structure cover the exhaust holes 351 to block the communication between the first chamber 1B and the second chamber 1C, and as the volume of the first chamber 1B continues to increase, the air pressure in the second chamber 1C also keeps covering the exhaust plugs.

It should be noted that the negative pressure generator with the one-way exhaust structure is not limited to the negative pressure generator described in the third and fourth embodiments, for example, as shown in fig. 14, the negative pressure generator with the one-way exhaust structure may further include a massage member 4 as shown in fig. 14, the massage member 4 includes a holding part 41 fixed on one side of the piston body 31 facing the suction port 1A, and a plurality of massage protrusions 43 are provided on one side of the holding part 41 away from the piston body 31, and the massage protrusions 43 may at least partially protrude out of the suction port 1A. In order to make the one-way exhaust structure communicate the first cavity 1B and the second cavity 1C, correspondingly, a venting hole 411 communicating with the exhaust hole 351 is arranged on the holding part 41 in a penetrating manner; further, as shown in fig. 14, the massage member 4 and the sealing ring 33 may be integrally formed, wherein the periphery of the holding portion 41 is connected to the sealing ring 33.

It should be noted that the configuration of the driving device 5 is not limited to the configuration described in the first to fourth embodiments, and for example, the driving device may be an electromagnetic actuator including a first magnetic member and a second magnetic member connected to the transmission member, one of the first magnetic member and the second magnetic member includes a coil, and the other of the first magnetic member and the second magnetic member is a magnet, and when the coil is energized, the interaction force between the first magnetic member and the second magnetic member drives the piston to reciprocate.

The magnet can be a permanent magnet or an electromagnet.

The utility model also provides a negative pressure massager, which comprises the negative pressure generator.

The above embodiments of the present invention are only described, and it should be noted that, for those skilled in the art, modifications can be made without departing from the inventive concept, but these all fall into the protection scope of the present invention.

Claims (18)

1. A negative pressure generator, characterized in that, it includes cavity (1) that has absorption mouth (1A), locate piston (3, 3', 3 ") in cavity (1) and drive piston (3, 3', 3") reciprocating motion in cavity (1) in order to produce negative pressure drive arrangement (5) at absorption mouth (1A), piston (3, 3', 3 ") include piston body (31) and locate on the piston body (31) periphery in order to realize piston (3, 3', 3") and cavity wall of cavity (1) between sealed sealing washer (33, 33 ').

2. The negative pressure generator according to claim 1, wherein a sealing groove (311) is formed in an outer periphery of the piston body (31), and the sealing ring (33, 33') is fitted in the sealing groove (311).

3. The negative pressure generator of claim 2, wherein the sealing ring (33, 33 ') includes an arc portion (331) spaced apart from the piston body (31) and a fixing portion (333) extending from the arc portion (331) into the sealing groove (311) along two opposite sides of the piston (3, 3', 3 ") in the reciprocating direction, and being embedded in the sealing groove (311), wherein the arc portion (331), the fixing portion (333), and the piston body (31) enclose a collapsing space (33A), and the arc portion (331) can collapse toward the collapsing space (33A).

4. The negative pressure generator according to any one of claims 1 to 3, further comprising a massaging member (4), wherein the massaging member (4) comprises a holding portion (41) fixed to a side of the piston body (31) facing the suction port (1A) and at least one massaging protrusion (43) provided on a side of the holding portion (41) facing away from the piston body (31).

5. Negative pressure generator according to claim 4, characterized in that the massaging element (4) is integrally formed with the sealing ring (33, 33 '), wherein the peripheral edge of the holding portion (41) is connected with the sealing ring (33, 33').

6. Negative pressure generator according to claim 1, characterized in that said piston (3, 3', 3 ") separates said chamber (1) into a first chamber (1B) and a second chamber (1C), said first chamber (1B) communicating with said adsorption port (1A), said piston (3', 3") further comprising a one-way venting structure (35) communicating said first chamber (1B) with said second chamber (1C).

7. Negative pressure generator according to claim 6, characterized in that the unidirectional venting structure (35) comprises a venting hole (351) passing through the piston body (31) for communicating the first chamber (1B) and the second chamber (1C), and a venting plug (353, 353') secured to the piston body (31) and covering a side of the venting hole (351) remote from the first chamber (1B).

8. The negative pressure generator according to claim 7, wherein the exhaust plug (353) includes a body portion (355) fixedly provided on a side of the piston body (31) away from the suction port (1A) and a covering portion (357) covering the exhaust hole (351), the covering portion (357) being made of an elastic material.

9. The negative pressure generator according to claim 7, wherein the vent plug (353 ') includes a body portion (355) fixedly attached to a side of the piston body (31) away from the suction port (1A), the body portion (355) having a through hole (356') communicating with the vent hole (351), and a surrounding wall (359) formed by extending from a periphery of the through hole (356 ') into the second chamber (1C), the surrounding wall (359) being made of an elastic material and closing the through hole (356').

10. Negative pressure generator according to claim 1, characterized in that the chamber (1) comprises a rigid chamber (11) having an opening (11A) and a flexible bladder (13), the piston (3, 3', 3 ") being located inside the rigid chamber (11), the flexible bladder (13) being connected at the opening (11A) of the rigid chamber (11), the flexible bladder (13) having an air duct (13A) communicating with the opening (11A), the air duct (13A) forming the suction opening (1A) at its end remote from the opening (11A).

11. Negative pressure generator according to claim 10, characterized in that the rigid chamber (11) comprises a first chamber wall (111) extending in the direction of movement of the piston (3, 3', 3 ") and enclosing the opening (11A), and a second chamber wall (113) arranged at the end of the first chamber wall (111) remote from the opening (11A), a transmission member (7) being movably arranged on the second chamber wall (113), the transmission member (7) connecting the piston (3, 3', 3") and the driving device (5).

12. Negative pressure generator according to claim 11, characterized in that the second chamber wall (113) is perforated with a leakage hole (115).

13. Negative pressure generator according to claim 11, characterized in that a self-lubricating bushing (6) is provided between the transmission member (7) and the second chamber wall (113).

14. The negative pressure generator according to claim 11, characterized in that the driving device (5) comprises a transmission assembly (51) and a motor (53), the motor (53) is connected with the transmission member (7) through the transmission assembly (51), wherein the transmission assembly (51) is any one of an eccentric transmission structure, a cam and a ball screw.

15. Negative pressure generator according to claim 14, characterized in that the transmission assembly (51) comprises a transmission connection eccentric (511) and a connecting rod (513), the eccentric (511) being connected with the motor (53), the connecting rod (513) being hinged with the transmission member (7).

16. The negative pressure generator according to claim 11, wherein the driving device (5) is an electromagnetic actuator including a first magnetic member and a second magnetic member connected to the transmission member (7), wherein one of the first magnetic member and the second magnetic member includes a coil, and the other one of the first magnetic member and the second magnetic member is a magnet, and when the coil is energized, the piston (3, 3', 3 ") is driven to reciprocate by an interaction force between the first magnetic member and the second magnetic member.

17. Negative pressure generator according to claim 1, characterized in that the cavity is provided with a heating coil (9) or a semiconductor cooling plate (9).

18. A negative pressure massager comprising the negative pressure generator of any one of claims 1-17.

Images