WO2022267114A1

WO2022267114A1 - Negative pressure generator and negative pressure massager

Info

Publication number: WO2022267114A1
Application number: PCT/CN2021/106800
Authority: WO
Inventors: 何敏超; 俞勇; 张国辉
Original assignee: 深圳市司沃康科技有限公司
Priority date: 2021-06-26
Filing date: 2021-07-16
Publication date: 2022-12-29
Also published as: JP3234244U

Abstract

A negative pressure generator and a negative pressure massager. The negative pressure generator comprises a cavity (1) provided with a suction port (1A), a piston (3) arranged in the cavity (1), and a drive device (5) used for driving the piston (3) to perform reciprocating motion in the cavity (1) to generate a negative pressure at the suction port (1A). The negative pressure generator and the negative pressure massager can improve the suction effect.

Description

Negative pressure generator and negative pressure massager

【Technical field】

The invention relates to the field of massage devices, in particular to a negative pressure generator and a negative pressure massager.

【Background technique】

With the acceleration of the pace of life, people's work pressure also increases. After a day's work, the human body is very tired and sore. In order to relieve fatigue and soreness, people usually use various massagers to massage their bodies, such as negative pressure massagers. The negative pressure massager relieves fatigue and soreness by absorbing and relaxing the skin, so as to achieve the purpose of soothing the body and mind. However, the adsorption effect of the negative pressure massager in the related art is not good.

Therefore, it is necessary to improve the existing negative pressure massager to avoid the above-mentioned defects.

【Content of invention】

The object of the present invention is to provide a negative pressure generator which can improve the adsorption effect and a negative pressure massager using the negative pressure generator.

Technical scheme of the present invention is as follows:

A negative pressure generator comprises a cavity with a suction port, a piston arranged in the cavity, and a driving device for driving the piston to reciprocate in the cavity to generate negative pressure at the suction port.

Preferably, the piston includes a piston body and a sealing ring provided on the outer periphery of the piston body to realize the sealing between the piston and the cavity wall of the cavity.

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

Preferably, the sealing ring includes an arc-shaped portion spaced from the piston body, and two opposite sides of the arc-shaped portion along the reciprocating direction of the piston respectively extend into the sealing groove and are embedded. In the fixing part of the sealing groove, the arc part, the fixing part and the piston body enclose a collapse space, and the arc part can collapse toward the collapse space.

Preferably, the negative pressure generator further includes a massaging part, and the massaging part includes a holding part fixed on the side of the piston body facing the suction port and a holding part provided on the side of the holding part away from the piston body. At least one massaging bump.

Preferably, the massaging element is integrally formed with the sealing ring, wherein the periphery of the holding part is connected to the sealing ring.

The piston separates the cavity into a first cavity and a second cavity, and the first cavity communicates with the adsorption port, and the piston includes a one-way row that can communicate with the first cavity and the second cavity. air structure.

Preferably, the one-way exhaust structure includes an exhaust hole penetrating through the piston body for communicating the first cavity and the second cavity, and is fixed on the piston body and covers the exhaust hole. A vent plug on a side away from the first cavity.

Preferably, the exhaust plug includes a main body portion fixed on the side of the piston body away from the suction port and a covering portion covering the exhaust hole, and the covering portion is made of elastic material.

Preferably, the exhaust plug includes a main body portion and a surrounding wall fixed on the side of the piston body away from the suction port, the main body portion has a through hole communicating with the exhaust hole, and the surrounding wall Extending from the periphery of the through hole to the second cavity, the surrounding wall is made of elastic material and closes the through hole.

Preferably, the cavity includes a rigid cavity with an opening and a flexible capsule, the piston is arranged in the rigid cavity, the flexible capsule is connected to the opening of the rigid cavity, the The flexible capsule has an air channel communicating with the opening, and the air channel forms the suction port at its end away from the opening.

Preferably, the rigid cavity includes a first cavity wall extending along the moving direction of the piston and enclosing the opening, and a second cavity wall provided at an end of the first cavity wall away from the opening, so A transmission member is movably pierced on the wall of the second cavity, and the transmission member connects the piston and the driving device.

Preferably, a leakage hole is formed through the wall of the second chamber.

Preferably, a self-lubricating bushing is provided between the transmission member and the second chamber wall.

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

Preferably, the transmission assembly includes an eccentric member and a connecting rod connected by transmission, the eccentric member is connected to the motor, and the connecting rod is hinged to the transmission member.

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

Preferably, a heating coil or a semiconductor cooling chip is provided on the outer periphery of the first chamber wall.

The present invention also provides a negative pressure massager, which includes the negative pressure generator described in any one of the above.

Compared with related technologies, the negative pressure generator provided by the present invention can improve the adsorption effect by arranging a piston in the cavity and driving the piston to reciprocate in the cavity through a driving device to generate negative pressure at the adsorption port.

【Description of drawings】

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

Fig. 2 is a structural schematic diagram of the assembled negative pressure generator shown in Fig. 1;

Fig. 3 is a sectional view of the negative pressure generator shown in Fig. 2;

Fig. 4 is the enlarged view of part a in the negative pressure generator shown in Fig. 3;

Fig. 5 is the structural schematic diagram of the partial structure in the second embodiment of the negative pressure generator provided by the present invention

Fig. 6 is a structural schematic diagram of the massage member and the sealing ring in the partial structure shown in Fig. 5;

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

Fig. 8 is a schematic structural view of the exhaust plug in the negative pressure generator shown in Fig. 7;

Fig. 9 is a schematic structural diagram of the assembled negative pressure generator shown in Fig. 7;

Fig. 10 is a sectional view of the negative pressure generator shown in Fig. 9;

Fig. 11 is a schematic structural view of Embodiment 4 of the negative pressure generator provided by the present invention;

Fig. 12 is a schematic structural view of the exhaust plug in the negative pressure generator shown in Fig. 11;

Figure 13 is a bottom view of the exhaust plug shown in Figure 12;

Fig. 14 is a structural schematic diagram of the massaging element and the sealing ring in the negative pressure generator with a one-way exhaust structure.

【detailed description】

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. . Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Embodiment one

Please refer to Fig. 1 to Fig. 4, the negative pressure generator includes a cavity 1 having an adsorption port 1A, a piston 3 disposed in the cavity 1 and driving the piston 3 to reciprocate in the cavity 1 to A driving device 5 for generating a negative pressure at the suction port 1A. Wherein, the piston 3 can separate the cavity 1 from the first cavity 1B and the second cavity 1C, the first cavity 1B communicates with the suction port 1A, and the suction port 1A is attached to the human body during use. When the driving device 5 drives the piston 3 to move away from the suction port 1A, the volume of the first chamber 1B increases to generate negative pressure, thereby generating negative pressure at the suction port 1A.

The cavity 1 includes a rigid cavity 11 with an opening 11A and a flexible bladder 13, the piston 3 is arranged in the rigid cavity 11, and the flexible bladder 13 is connected to all the rigid cavity 11. At the opening 11A, the flexible capsule 13 has an air channel 13A communicating with the opening 11A, and the air channel 13A forms the suction port 1A at its end away from the opening 11A.

In this embodiment, the flexible bladder 13 is integrally formed with the rigid cavity 11 . It can be understood that, in other embodiments, the flexible bladder 13 and the rigid cavity 11 may also be connected by means of glue 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 the opening 11A, and the first cavity wall 111 is located away from the opening. The second chamber wall 113 at one end of 11A, the second chamber wall 113 is movably pierced with a transmission member 7, and the transmission member 7 connects the piston 3 and the driving device 5 so that the driving device 5 can drive The transmission member 7 moves to drive the piston 3 to reciprocate in the cavity 1 .

As shown in 3, a self-lubricating bushing 6 is provided between the second chamber wall 113 and the transmission member 7 so that the transmission member 7 can move through the second chamber wall 113 and reduce the The sliding resistance of the transmission member 7.

In this embodiment, a leakage hole 115 is formed through the second cavity wall 113 . As shown in FIG. 1 , there are multiple leakage holes 115 . By setting the leakage hole 115, when the piston 3 moves away from the adsorption port 1A, the second chamber 1C exhausts air to the outside through the leakage hole 115, thereby reducing the distance between the piston 3 and the adsorption port 1A. The resistance when the suction port 1A moves is described. Further preferably, the leakage hole 115 penetrates through the second cavity wall 113 along the moving direction of the piston 3 .

The piston 3 includes a piston body 31, a sealing ring 33 arranged on the outer periphery of the piston body 31 to realize the sealing between the piston 3 and the cavity wall of the cavity 1 (specifically, the piston 3 and the between the first chamber walls 111 is sealed by the sealing ring 33).

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

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

In this embodiment, the sealing ring 33 includes an arc portion 331 spaced apart from the piston body 31 and extends from two opposite sides of the arc portion 331 along the reciprocating direction of the piston 3 to the The sealing groove 311 is extended and formed and embedded in the fixing portion 333 of the sealing groove 311, wherein the arc portion 331, the fixing portion 333 and the piston body 31 enclose a collapse space 33A, the The arc portion 331 can collapse toward the collapse space 33A, thereby avoiding the stuck problem of the piston 3 when reciprocating in the cavity 1 . It can be understood that, in other embodiments, the sealing ring 33 may be a conventional O-ring in the prior art, for example, a conventional rubber sealing ring.

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

The driving device 5 includes a transmission assembly 51 and a motor 53, the motor 53 is connected to the transmission member 7 through the transmission assembly 51, wherein the transmission assembly 51 can be an eccentric transmission structure, a cam, a ball screw, etc. of any kind.

In this embodiment, the transmission assembly 51 is an eccentric transmission structure. The transmission assembly 51 includes an eccentric member 511 and a connecting rod 513 that are connected by transmission, the eccentric member 511 is connected to the motor 53 , and the connecting rod 513 is hinged to the transmission member 7 . When the negative pressure generator is working, the motor 53 drives the piston 3 to reciprocate in the cavity 1 through the eccentric member 511 , the connecting rod 513 and the transmission member 7 in sequence.

Embodiment two

Please refer to FIG. 5 and FIG. 6 in conjunction. The difference between Embodiment 2 and Embodiment 1 is that the negative pressure generator also includes a massaging element 4 , and the massaging element 4 includes an element that is fixed on the piston body 31 and faces the suction port 1A. The holding portion 41 on one side and the side of the holding portion 41 away from the piston body 31 are provided with a plurality of massage protrusions 43 , and the massage protrusions 43 can at least partially protrude from the suction opening 1A. Specifically, when the piston 3 moves toward the suction port 1A to the maximum position, the massage protrusion 43 can at least partially protrude from the suction port 1A, so that the massage protrusion 43 can massage the body parts. Massage to improve user experience effect.

In this embodiment, the massaging element 4 is integrally formed with the sealing ring 33 , wherein the peripheral edge of the holding portion 41 is connected with the sealing ring 33 . It can be understood that, in other embodiments, the massaging element 4 and the sealing ring 33 can also be set as two independent components (that is, the massaging element 4 is not integrally formed with the sealing ring 33 ) , wherein, the retaining portion 41 can be fixed to the piston body 31 by means of glue.

Embodiment three

Please refer to Figure 7 to Figure 10 in combination, the difference between Embodiment 3 and Embodiment 1 is only:

The piston 3' also includes a one-way exhaust structure 35 that can communicate with the first chamber 1B and the second chamber 1C, wherein when the piston 3' moves toward the adsorption port 1A, the one-way exhaust structure 35 The exhaust structure 35 communicates with 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 The 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 setting the one-way exhaust structure 35, the suction port 1A can generate a negative pressure when the piston 3' moves away from the suction port 1A, and the first chamber 1B can be opened in the piston 3'. When moving toward the adsorption port 1A, the exhaust is exhausted to the second chamber 1C through the one-way exhaust structure 35, and the second chamber 1C is communicated with the outside world, thereby reducing the flow of the piston 3' to the said second chamber 1C. Resistance when suction port 1A moves.

The one-way exhaust structure 35 includes an exhaust hole 351 penetrating through the piston body 31 for communicating with the first chamber 1B and the second chamber 1C, and is fixed on the piston body 31 and covers the The exhaust hole 351 is away from the exhaust plug 353 on the side of the first chamber 1B, wherein when the piston 3' moves toward the adsorption port 1A, the exhaust plug 353 in the first chamber 1B Under the action of air pressure, the exhaust hole 351 is opened to communicate the first chamber 1B and the second chamber 1C. When the piston 3' moves away from the adsorption port 1A, the exhaust plug 353 is in the The gas pressure in the second chamber 1C closes the exhaust hole 351 to block the communication between the first chamber 1B and the second chamber 1C.

As shown in Figures 8 and 10, the exhaust plug 353 is roughly in the shape of an annular sheet, and the exhaust plug 353 can be elastically deformed. For example, the exhaust plug 353 can be made of silica gel material, so that the exhaust The plug 353 is both flexible and elastic. Specifically, as shown in FIG. 8 , the exhaust plug 353 includes a main body portion 355 fixed on the side of the piston body 31 away from the suction port 1A and a covering portion 357 covering the exhaust hole 351 , so that The main body portion 355 has a through hole 356 , and the covering portion 357 is formed extending from a part of the inner periphery of the through hole 356 into the through hole 356 , and the covering portion 357 can move in the through hole 356 .

When the piston 3' moves away from the suction port 1A, the air pressure in the first chamber 1B decreases due to the increase in volume (the air pressure in the first chamber 1B is the same as that in the second chamber 1C). When the air pressure difference is not enough to overcome the elastic deformation resistance of the covering part 357), the first chamber 1B forms a negative pressure and generates an adsorption force at the suction port 1A. Under the action of the negative pressure, the covering part 357 covers the exhaust hole 351 to block the communication between the first chamber 1B and the second chamber 1C. As the volume of the first chamber 1B continues to increase, the covering part 357 is still in the second Under the action of the air pressure of the cavity 1C, the exhaust hole 351 is kept covered, thereby keeping the first cavity 1B and the second cavity 1C sealed, and maintaining the adsorption state of the adsorption port 1A.

When the piston 3' moves toward the adsorption port 1A, first, the piston 3' moves to reduce the volume of the first chamber 1B to reduce and eliminate the negative pressure in the first chamber 1B, and then the piston 3' squeezes Pressing the first chamber 1B causes the air pressure in the first chamber 1B to increase, when the air pressure in the first chamber 1B increases (the air pressure in the first chamber 1B is greater than that in the second chamber 1C When the air pressure in the first cavity 1B can overcome the elastic deformation resistance of the covering part 357, the covering part 357 will elastically deform under the action of the air pressure in the first chamber 1B to open the exhaust hole 351 and discharge the first The air in chamber 1B reduces the movement resistance of piston 3'.

Wherein, the main body portion 355 can be fixedly connected to the piston main body 31 by means of glue.

As shown in FIG. 7 and FIG. 8 , there are multiple vent holes 351 , and correspondingly, multiple through holes 356 and covering portions 357 are also provided.

In this embodiment, the cavity 11 is provided with a heating coil (9) or a semiconductor cooling chip (9). Specifically, the outer periphery of the first cavity wall 111 is further provided with a semiconductor cooling chip 9 . Wherein, the semiconductor cooling plate 9 can be arranged such that its hot end is disposed close to the first chamber wall 111 , or it can be disposed such that its cold end is disposed near the first chamber wall 111 . In this way, the sensory temperature of the body parts to the flexible capsule 13 can be adjusted through the semiconductor refrigeration sheet 9, thereby improving the massage experience. It can be understood that, in other implementation manners, the semiconductor cooling chip 9 can also be replaced by a heating coil 9 .

As shown in FIG. 1 , the sealing ring 33 ′ is a conventional O-ring in the prior art, for example, a rubber sealing ring. It should be noted that, in this embodiment, the sealing ring 33' can also adopt the sealing ring as shown in Embodiment 1 (that is, the sealing ring 33' includes an arc-shaped portion spaced apart from the piston body 31 331 and two opposite sides of the arc portion 331 along the direction of the reciprocating movement of the piston 3′ respectively extend into the seal groove 311 and form a fixing portion 333 embedded in the seal groove 311, wherein the The arc portion 331 , the fixing portion 333 and the piston body 31 enclose a collapse space 33A, and the arc portion 331 can collapse toward the collapse space 33A).

Embodiment Four

Please refer to FIG. 11 to FIG. 13 , the difference between the fourth embodiment and the third embodiment is that the exhaust plug 353 ′ includes a main body portion 355 ′ fixed on the side of the piston main body 31 away from the suction port 1A. And a surrounding wall 359, the main body portion 355' has a through hole 356' communicating with the exhaust hole 351, and the surrounding wall 359 is formed by extending from the periphery of the through hole 356' into the second chamber 1C .

The surrounding wall 359 is made of an elastic material, and the surrounding wall 359 encloses and forms the passage 358 communicated with the through hole 356 ′. In a static state, the surrounding wall 359 closes the passage 358 by its own elastic force or makes the passage 358 basically closed (there is only a gap ).

When the piston 3" moves away from the adsorption port 1A, the air pressure in the first chamber 1B decreases due to the increase in volume (the air pressure in the first chamber 1B and the air pressure in the second chamber 1C When the air pressure difference is not enough to overcome the elastic deformation resistance of the surrounding wall 359), the first cavity 1B forms a negative pressure and generates an adsorption force at the adsorption port 1A, and under the effect of the negative pressure, the surrounding wall 359 Closed to block the communication between the through hole 356' and the second chamber 1C, and as the volume of the first chamber 1B continues to increase, the surrounding wall 359 is also maintained under the pressure of the second chamber 1C closure.

When the piston 3" moves toward the adsorption port 1A, first, 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 "Squeeze the first chamber 1B, causing the air pressure in the first chamber 1B to increase, when the air pressure in the first chamber 1B increases (the air pressure in the first chamber 1B is greater than the second chamber 1C) to overcome the elastic deformation resistance of the surrounding wall 359, the surrounding wall 359 is elastically deformed under the action of the air pressure in the first chamber 1B to open the channel 358, and the channel 358 communicates with the The through hole 356 ′ communicates with the second cavity 1C (that is, the first cavity 1B communicates with the second cavity 1C 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 can be set to pass through the piston body 31 and connect with the piston The one-way valve fixed by the main body 31; the exhaust plugs 353, 353' of the one-way exhaust structure in the third and fourth embodiments can also be the exhaust plugs of the flat structure made of hard materials, and correspondingly, the exhaust plugs of the flat structure The air plug and the piston body 31 can be connected by a spring, 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 spring When the elastic deformation resistance is high, the exhaust plug of the flat structure opens the exhaust hole 351 under the action of the air pressure in the first chamber 1B. When the piston moves away from the adsorption port 1A, due to the first chamber The increase in the volume of 1B causes the air pressure in it to decrease (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 spring), the exhaust of the flat plate structure The plug covers the vent hole 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 vent plug of the flat plate structure is still The air vent 351 is kept covered by the air pressure of the second chamber 1C.

It should also be noted that the negative pressure generator with a one-way exhaust structure is not limited to the negative pressure generators described in the third and fourth embodiments, for example, as shown in 14, the negative pressure generator with a one-way exhaust structure The negative pressure generator can also include a massage piece 4 as shown in 14, the massage piece 4 includes a holding part 41 fixed on the side of the piston body 31 facing the suction port 1A, and the holding part 41 is away from the suction port 1A. A plurality of massage protrusions 43 are provided on one side of the piston body 31 , and at least part of the massage protrusions 43 can protrude from the suction opening 1A. In order to allow the one-way exhaust structure to communicate with the first cavity 1B and the second cavity 1C, correspondingly, the holding part 41 is provided with an air passage hole 411 communicating with the exhaust hole 351; further As shown in FIG. 14 , the massaging element 4 and the sealing ring 33 can also be integrally formed, wherein the peripheral edge of the holding portion 41 is connected to the sealing ring 33 .

It should also be noted that the structure of the driving device 5 is not limited to the structure described in Embodiment 1 to Embodiment 4. For example, the driving device can also be an electromagnetic driver, and the electromagnetic driver includes a first magnetic part and a The second magnetic part connected to the transmission part, wherein one of the first magnetic part and the second magnetic part includes a coil, and the other is a magnet. When the coil is energized, the first magnetic part The interaction force with the second magnetic part can drive the piston to reciprocate.

Wherein, the magnet can be a permanent magnet or an electromagnet.

The present invention also provides a negative pressure massager, which includes the aforementioned negative pressure generator.

What has been described above is only the embodiment of the present invention. It should be pointed out that for those of ordinary skill in the art, improvements can be made without departing from the creative concept of the present invention, but these all belong to the present invention. scope of protection.

Claims

A negative pressure generator is characterized in that it comprises a chamber (1) having an adsorption port (1A), a piston (3, 3', 3") arranged in the chamber (1) and a driving means The piston (3, 3', 3") reciprocates in the cavity (1) to generate a negative pressure driving device (5) at the adsorption port (1A).
The negative pressure generator according to claim 1, characterized in that, the piston (3, 3', 3") comprises a piston body (31) and is arranged on the outer circumference of the piston body (31) to realize the A sealing ring (33, 33') for sealing between the piston (3, 3', 3") and the cavity wall of the cavity (1).
The negative pressure generator according to claim 2, characterized in that a seal groove (311) is provided on the outer circumference of the piston body (31), and the seal rings (33, 33') are embedded in the seal groove (311).
The negative pressure generator according to claim 3, characterized in that, the sealing ring (33, 33') includes an arc portion (331) spaced apart from the piston body (31) and from the arc portion (331). part (331) along two opposite sides in the direction of reciprocating movement of the piston (3, 3', 3") respectively extending into the sealing groove (311) and embedded in the fixing part of the sealing groove (311) part (333), wherein, the arc part (331), the fixing part (333) and the piston body (31) enclose to form a collapse space (33A), and the arc part (331) can Collapse towards said collapse space (33A).
The negative pressure generator according to any one of claims 2-4, characterized in that, the negative pressure generator also includes a massaging piece (4), and the massaging piece (4) includes a body fixed on the piston body (31 ) toward the holding portion (41) on the side of the suction port (1A) and at least one massage protrusion (43) provided on the side of the holding portion (41) away from the piston body (31).
The negative pressure generator according to claim 5, characterized in that, the massaging element (4) and the sealing ring (33, 33') are integrally formed, wherein the periphery of the holding part (41) and the The sealing ring (33, 33') is connected.
The negative pressure generator according to claim 2, characterized in that, the piston (3, 3', 3") separates the cavity (1) from the first cavity (1B) and the second cavity (1C) , the first chamber (1B) communicates with the adsorption port (1A), and the piston (3', 3 ") also includes a The one-way exhaust structure (35).
The negative pressure generator according to claim 7, characterized in that, the one-way exhaust structure (35) includes a structure penetrating through the piston body (31) for communicating with the first chamber (1B) and the The exhaust hole (351) of the second chamber (1C) and the exhaust plug ( 353, 353').
The negative pressure generator according to claim 8, characterized in that, the exhaust plug (353) includes a main body portion (355) fixed on the side of the piston body (31) away from the suction port (1A) ) and the covering part (357) covering the exhaust hole (351), the covering part (357) is made of elastic material.
The negative pressure generator according to claim 8, characterized in that, the exhaust plug (353') includes a main body part ( 355) 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) passes through the through hole (356' ) extending into the second cavity (1C), the surrounding wall (359) is made of elastic material and closes the through hole (356').
The negative pressure generator according to claim 1, characterized in that, the cavity (1) comprises a rigid cavity (11) with an opening (11A) and a flexible bladder (13), the piston (3, 3', 3") are arranged in the rigid cavity (11), the flexible bladder (13) is connected to the opening (11A) of the rigid cavity (11), the flexible bladder (13) It has an air channel (13A) communicating with the opening (11A), and the air channel (13A) forms the adsorption port (1A) at its end away from the opening (11A).
The negative pressure generator according to claim 11, characterized in that, the rigid cavity (11) includes an opening ( 11A) of the first cavity wall (111) and the second cavity wall (113) located at the end of the first cavity wall (111) away from the opening (11A), the second cavity wall (113) is movable A transmission member (7) is pierced through the ground, and the transmission member (7) connects the pistons (3, 3', 3") and the driving device (5).
The negative pressure generator according to claim 12, characterized in that a leakage hole (115) is penetrated through the second cavity wall (113).
The negative pressure generator according to claim 12, characterized in that, a self-lubricating bushing (6) is provided between the transmission member (7) and the second chamber wall (113).
The negative pressure generator according to claim 12, characterized in that, the drive device (5) comprises a transmission assembly (51) and a motor (53), and the motor (53) communicates with the transmission assembly (51) The transmission member (7) is connected, wherein the transmission assembly (51) is any one of an eccentric transmission structure, a cam, and a ball screw.
The negative pressure generator according to claim 15, characterized in that, the transmission assembly (51) comprises an eccentric (511) and a connecting rod (513) connected by transmission, and the eccentric (511) is connected to the motor (53) connected, the connecting rod (513) is hinged with the transmission member (7).
The negative pressure generator according to claim 12, characterized in that, the driving device (5) is an electromagnetic driver, which includes a first magnetic part and a second magnetic part connected to the transmission part (7), wherein , one of the first magnetic part and the second magnetic part includes a coil, the other is a magnet, and when the coil is energized, the mutual interaction between the first magnetic part and the second magnetic part The force drives the piston (3, 3', 3") to reciprocate.
The negative pressure generator according to claim 1, characterized in that, the cavity is provided with a heating coil (9) or a semiconductor cooling chip (9).
A negative pressure massager, comprising the negative pressure generator described in any one of claims 1-18.