WO2014121683A1

WO2014121683A1 - Adsorption device

Info

Publication number: WO2014121683A1
Application number: PCT/CN2014/070709
Authority: WO
Inventors: 周华松; 林逢德; 陈健民; 曹斌
Original assignee: 厦门松霖科技有限公司
Priority date: 2013-02-06
Filing date: 2014-01-16
Publication date: 2014-08-14

Abstract

An adsorption device, comprising a body portion (10) made from a hard material and installed with a negative pressure generating mechanism; the body portion (10) is provided with an adsorption plane (11) and an adsorption cavity (12); the adsorption cavity (12) is provided with a through hole (121) open to the adsorption plane (11) recessed with a ring groove (13), and the ring groove (13) is fitted with an elastic seal ring (20) having a portion protruding from the adsorption plane (11); the negative pressure generating mechanism cooperates with the adsorption cavity (12) so as to allow the adsorption cavity (12) to generate negative pressure therein via the negative pressure mechanism; the negative pressure deforms the elastic seal ring (20) to seal the adsorption cavity (12) so as to produce static friction between the elastic seal ring (20) and an adsorbate, thus enabling the adsorption device to adsorb the adsorbate through static friction.

Description

Adsorption device

Technical field

The invention relates to an adsorption device.

Background technique

The existing adsorption device, such as CN101766432B published in the Chinese Patent Database, discloses a hard vacuum suction cup comprising a rigid suction cup, a vacuuming mechanism, an annular groove, a non-slip gasket, a soft rubber ring, and a C-shaped soft rubber ring. There is a vacuuming mechanism in the hard suction cup, the hard suction cup having an uneven surface, the surface is provided with an annular groove, and the soft rubber ring is installed in the annular groove. The vacuum suction chamber is evacuated by a vacuuming mechanism, and atmospheric pressure acts on the surface of the hard suction cup, and the soft rubber ring is pressed into the gap of the surface of the object to be sucked to fill the gap of the surface of the object to be sucked, thereby producing a peripheral sealing effect. The static friction generated between the anti-slip gasket and the adsorbate adsorbs the adsorption device on the adsorbate. Since the anti-slip gasket is required, the structure is complicated and the cost is high; and the hard vacuum suction cup has no pressure relief passage, and is difficult to adjust and disassemble after installation.

Summary of the invention

The present invention provides an adsorption device that overcomes the deficiencies of the adsorption device of the prior art.

The technical solution adopted by the present invention to solve the technical problems thereof is:

The adsorption device comprises a body portion (10) made of a hard material, the body portion (10) is provided with a negative pressure generating mechanism, and the body portion (10) is provided with an adsorption plane (11) and an adsorption chamber (12). The adsorption chamber (12) is disposed at an opening (121) of the adsorption plane (11); the adsorption plane (11) is recessed with a ring groove (13), and the ring groove (13) is attached with an elastic sealing ring (20) The elastic sealing ring (20) has a portion protruding from the adsorption plane (11); the negative pressure generating mechanism cooperates with the adsorption chamber (12) to generate a negative pressure in the adsorption chamber (12) by the negative pressure generating mechanism, the negative pressure The elastic sealing ring (20) is deformed to seal the adsorption chamber (12) to generate a static friction force between the elastic sealing ring (20) and the object to be adsorbed, and the adsorption device is adsorbed on the adsorbed object by the static friction force;

There is also a pressure relief passage (41) having an inner port that opens the adsorption chamber (12) and an outer port that can open the outside air pressure;

There is also a control seat (42). The control seat (42) cooperates with the pressure relief passage (41) and can move between the pressure relief state and the sealing state. When the pressure relief state is released, the pressure relief passage (41) is unobstructed and is in a sealed state. The pressure relief passage (41) is blocked.

In a preferred embodiment, the body portion (10) includes a base (15) and a body (14) having a chassis (151) and a peripheral wall (152) fixed to a top surface of the chassis (151). The body (14) is fixed to the base (15), the bottom surface of the chassis (151) is the above-mentioned adsorption plane (11);

The negative pressure generating mechanism includes a piston (51) slidably coupled in the peripheral wall (152) and a absorbing elastomer (52) connecting the piston (51) and the body portion (10), the base (15) and the piston (51) Between the above-mentioned adsorption chamber (12) or the adsorption chamber (12), the connection port (121) is provided through the chassis (151).

In a preferred embodiment, the piston (51) protrudes from the extension shaft (511), and the body (14) has an attachment sleeve (141) attachable to the peripheral wall (152) and an attachment sleeve ( 141) a ring wall (142) extending inwardly from the periphery, the cross-sectional area of the piston (51) being larger than the cross-sectional area of the inner wall of the ring wall (142), the protruding shaft (511) passing through the inner hole of the ring wall (142); A sliding seat (512) attached to the end of the extension shaft (511); the absorbing elastomer (52) abuts between the sliding seat (512) and the ring wall (142).

In a preferred embodiment, a knob (513) rotatably coupled to the body (14) is provided. The knob (513) is coupled to the sliding seat (512) to drive the piston (51) downward by turning the knob (513). mobile.

In a preferred embodiment, a lever (514) is rotatably coupled to the body (14), and a ram (515) is disposed in the middle of the lever (514). The ram (515) abuts against the sliding seat (512).

In a preferred embodiment, the pressure relief passage (41) is provided in the body portion (10), and the control seat (42) is movable relative to the body portion (10).

In a preferred embodiment, the pressure relief passage (41) is provided in the piston (51), and the control seat (42) is movable relative to the piston (51).

The negative pressure generating mechanism includes a piston (51) sealingly slidably coupled in the peripheral wall (152) and a absorbing elastomer (52) connecting the piston (51) and the body portion (10), the base (15) and the piston ( 51) between the adsorption chamber (12) or the adsorption chamber (12), the connection port (121) is provided through the chassis (151); the piston (51) protrudes from the extension shaft (511);

The body (14) has an attachment sleeve (141) attachable to the outer wall (152) and a ring wall (142) extending inwardly from the periphery of the attachment sleeve (141); the piston (51) has a larger cross-sectional area a cross-sectional area of the inner wall of the annular wall (142), the protruding shaft (511) passes through the inner hole of the annular wall (142); and a sliding seat (512) attached to the end of the protruding shaft (511); the adsorbing elastic body (52) abutting between the sliding seat (512) and the ring wall (142);

The pressure relief passage (41) includes a through hole (411) penetrating the piston (51) and a pressure relief hole (412) provided in the sliding seat (512), and the control seat (42) is slidable relative to the sliding seat (512) A pressure relief elastomer (43) is provided for the piston (51) and the control seat (42).

In a preferred embodiment, the control seat (42) protrudes from the pressing rod (421), the cross-sectional area of the control seat (42) is larger than the cross-sectional area of the pressure relief hole (412), and the pressing rod (421) passes through the pressure relief A pressure relief gap is left between the hole (412) and the pressure relief hole (412) and the pressing rod (421).

The negative pressure generating mechanism includes a piston (51) slidably coupled in the peripheral wall (152) and a absorbing elastomer (52) connecting the piston (51) and the body portion (10), the base (15) and the piston (51) Between the above-mentioned adsorption chamber (12) or the adsorption chamber (12), the connection port (121) is provided through the chassis (151);

The pressure relief passage (41) includes a first through hole (413) penetrating through the chassis (151), the control seat (42) is movably connected to the body portion (10), and a top abutting body portion (10) and The pressure relief elastomer (43) of the control seat (42).

In a preferred embodiment, the adsorption plane (11) is recessed with at least two concentric grooves (13), and each of the grooves (13) is provided with an elastic sealing ring (20).

In a preferred embodiment, the elastomeric sealing ring (20) has an "n" configuration with the "n" opening facing outward.

In a preferred embodiment, the elastomeric sealing ring (20) has a base attached to the annular groove (13) and an outer edge portion extending outwardly and downwardly from the base.

Compared with the background art, the technical solution has the following advantages:

1. The body part is provided with an adsorption plane, which is a plane, and generates a static friction force between the elastic sealing ring and the adsorbed object, and the adsorption device is adsorbed on the adsorbed object only by the static friction force, which can save the friction pad and reduce the production cost.

2. The pressure relief channel and the control seat are arranged to achieve the purpose of pressure relief through the external air pressure and the adsorption cavity, so as to release the adsorption and facilitate the removal or adjustment of the adsorption device.

3. The portion between the base and the piston constitutes the adsorption chamber or the adsorption chamber, and the connection port is disposed through the chassis, and has a simple structure and is convenient for installation.

4. The protruding shaft passes through the inner hole of the ring wall; the sliding seat is attached to the end of the protruding shaft, and the adsorption elastic body abuts between the sliding seat and the ring wall, which is convenient for installation and convenient for operation.

5. Another rotary knob is connected to the body, and the knob is connected to the sliding seat to drive the piston down by rotating the knob, which is convenient for operation and labor-saving.

6. A lever connected to the main body is rotatably connected, and a pressing rod is arranged in the middle of the lever, and the pressing rod abuts against the sliding seat, which is convenient for operation and labor-saving.

7. The pressure relief passage is disposed in the body portion, and the control seat can move relative to the body portion to facilitate expansion of the adsorption device.

8. The pressure relief passage is arranged on the piston, and the control seat can move relative to the piston, and can also be exhausted through the pressure relief passage when the negative pressure is generated, and the operation is convenient and fast.

9. The pressure relief passage comprises a through hole penetrating the piston and a pressure release hole provided on the sliding seat. The control seat can slide relative to the sliding seat, the structure is simple, the layout is reasonable, and the sliding of the control seat can be driven when the sliding seat is pressed Easy to operate.

10. The elastic sealing ring has a base portion and an outer edge portion to enhance the sealing performance, and can also be exhausted outward through the extension portion when the piston is exhausted, and the extension portion is similar to the one-way valve principle.

11. The elastic sealing ring has an n-shaped structure to create a two-stage sealing protection.

12. The adsorption plane is recessed with at least two concentric grooves, and each of the grooves is provided with an elastic sealing ring to generate two-stage sealing protection.

13. The pressure relief passage includes a first through hole through which the chassis is disposed. The control seat is movably connected to the body portion, and the negative pressure between the adsorption plane and the adsorbed body is directly connected to the external air pressure, and the release is quick and convenient.

DRAWINGS

The invention will now be further described with reference to the accompanying drawings and embodiments.

Fig. 1 is a front elevational view showing the adsorption device of the first embodiment.

2 is a perspective view of the adsorption device of the first embodiment.

3 is a perspective exploded view of the adsorption device of the first embodiment.

4 is a schematic cross-sectional view showing the adsorption device of the first embodiment, in a sealed state.

FIG. 5 is a schematic cross-sectional view showing the adsorption device of the first embodiment, in which the pressure is released.

Fig. 6 is a front elevational view showing the adsorption device of the second embodiment.

Fig. 7 is a front elevational view showing the adsorption device of the third embodiment.

8 is a cross-sectional view showing the adsorption device of the fourth embodiment.

9 is a schematic cross-sectional view of the adsorption device of the fifth embodiment.

Figure 10 is a cross-sectional view showing the adsorption device of the sixth embodiment.

Figure 11 is a cross-sectional view showing the adsorption device of the seventh embodiment.

Fig. 12 is a plan view showing the adsorption device of the eighth embodiment.

Fig. 13 is a plan view showing the adsorption device of the ninth embodiment.

Figure 14 is a cross-sectional view showing the adsorption device of the tenth embodiment.

Figure 15 is a cross-sectional view showing the adsorption device of the eleventh embodiment.

detailed description

Embodiment 1

Referring to Figures 1 through 5, the adsorption device includes a body portion 10 made of a hard material, and the body portion 10 is provided with a negative pressure generating mechanism.

The body portion 10 is provided with an adsorption plane 11 and an adsorption chamber 12, and the adsorption chamber 12 is disposed at a connection port 121 of the adsorption plane 11; the adsorption plane 11 is recessed with a ring groove 13. In the present embodiment, the body portion 10 includes a base 15 and a body 14. The base 15 has a chassis 151 and a peripheral wall 152 fixed on the top surface of the chassis 151. The base 151 is integrally formed. The bottom surface of the chassis 151 is the above-mentioned adsorption plane 11 . The through hole 121 is disposed at the center of the chassis 151 and has a diameter smaller than the inner diameter of the peripheral wall. In order to improve the adsorption force. The body 14 includes an outer sleeve 143, an attachment sleeve 141 fixed in the outer sleeve 143, a ring wall 142 extending inwardly from the periphery of the attachment sleeve 141, and an upper revolving wall 144 fixed to the annular wall 142. It can be molded in one piece. The attachment sleeve 141 is threaded out of the peripheral wall 152 and causes the outer sleeve 143 to just fit out of the chassis and be flush. Preferably, the body portion 10 further includes a connecting structure. In the embodiment, the connecting structure includes, for example, an outer connecting sleeve 16 and a hook 17 which are screwed outside the upper rotating wall 144. The outer connecting sleeve 16 is provided. The flange forms an annular groove between the flange and the annular wall. The hook 17 is sleeved on the outer connecting sleeve 16 and interposed between the annular groove so that the hook 17 and the body are connected together, and other connecting structures can be used as needed. In this embodiment, the outer casing has a circular structure.

The ring groove 13 is attached to an O-shaped elastic sealing ring 20 having a portion that protrudes from the adsorption plane 11. In this embodiment, only one annular groove 13 is disposed in the adsorption plane, and only one elastic sealing ring 20 is connected in the annular groove 13.

The negative pressure generating mechanism includes a piston 51 and an adsorption elastic body 52. The piston 51 is slidably coupled in the peripheral wall 152, and the adsorption elastic body 52 is connected to the piston 51 and the body portion 10. The adsorption chamber 12 or the adsorption chamber is formed between the base 15 and the piston 51. Part of 12.

In use, the piston 51 slides toward the base to remove the gas and store the elastic energy. The elastic sealing ring 20 abuts against the adsorbed object 30, and the elastic energy is released to drive the piston 51 to slide away from the base, so that a negative pressure is generated in the adsorption chamber 12. The negative pressure deforms the elastic sealing ring 20 to seal the adsorption chamber 12 to generate a static friction force between the elastic sealing ring 20 and the object to be adsorbed. According to the present invention, the adsorption device can be adsorbed on the adsorbate 30 only by the static friction force. Further, a gap is left between the adsorption plane in the adsorption state and the object to be adsorbed, or the adsorption plane abuts against the object to be adsorbed without a gap.

The piston 51 is protruded from the projecting shaft 511. The cross-sectional area of the piston 51 is larger than the cross-sectional area of the bore of the ring wall 142 to limit a sliding limit position of the piston 51. The other sliding limit position of the piston 51 is the chassis. The protruding shaft 511 passes through the inner hole of the ring wall 142; a sliding seat 512 attached to the end of the protruding shaft 511 is additionally provided; the absorbing elastic body 52 abuts between the sliding seat 512 and the ring wall 142. In this embodiment, an attachment groove is recessed in the outer surface of the piston 51. A Y-ring 516 is attached to the attachment groove, and the piston 51 is slidably sealed to the peripheral wall 152 by the Y-ring 516. In this embodiment, the sliding seat 512 is screwed onto the screw sleeve outside the protruding shaft 511 and a button portion extending outward from the periphery of the screw sleeve, and the button portion is adapted to the inner wall of the outer connecting sleeve 16. In this embodiment, the absorbing elastic body 52 is sleeved with the spiral sleeve and abuts between the ring wall and the button portion.

There is also a pressure relief passage 41 and a control seat 42; the pressure relief passage 41 has an inner port that opens the adsorption chamber 12 and an outer port that can be connected to the outside air pressure; the control seat 42 cooperates with the pressure relief passage 41 and can When the pressure relief state and the sealing state are active, the pressure relief passage 41 is unobstructed when the pressure is released, and the pressure relief passage 41 is blocked when it is in the sealed state. In the present embodiment, the pressure relief passage 41 is provided in the piston 51, and the control seat 42 is movable relative to the piston 51. In the present embodiment, the pressure relief passage 41 includes a through hole 411 penetrating the piston 51 and a pressure relief hole 412 disposed in the sliding seat 512. The control seat 42 is slidable relative to the sliding seat 512, and a top abutting piston 51 is additionally provided. And the pressure relief elastomer 43 of the control seat 42 to create an elastic force that maintains the control seat in a sealed state. In this embodiment, the control seat 42 protrudes from the pressing rod 421. The cross-sectional area of the control seat 42 is larger than the cross-sectional area of the pressure relief hole 412 to seal the pressure relief hole. The pressing rod 421 passes through the pressure relief hole 412 and the pressure relief hole. Between the 412 and the pressing rod 421, a pressure relief gap is left. When the pressing rod 421 is pressed, the control seat 42 can be driven to slide in the direction of the piston and the elastic energy can be saved. At this time, the control seat is separated from the pressure releasing hole 412, and the outside air can pass through the pressure releasing gap. The through hole 411 communicates with the adsorption chamber 12, and is in a clear state to relieve pressure. The release pressure is released, and the elastic energy release causes the control seat to slide away from the piston to seal the pressure relief hole 412 in a sealed state. In this embodiment, a ring protrusion 517 is disposed in the spiral sleeve, and the inner hole of the ring protrusion 517 is a part of the pressure relief hole, and the cross-sectional area of the control seat is smaller than the cross-sectional area of the spiral sleeve. Preferably, a button 44 for fitting the inner hole of the screw sleeve is attached to the end of the pressing lever 421.

Embodiment 2

Please refer to FIG. 6 , which differs from the first embodiment in that a knob 513 is rotatably connected to the body 14 , and the knob 513 is coupled to the sliding seat 512 to drive the sliding seat 512 to slide by rotating the knob 513 .

Embodiment 3

Please refer to FIG. 7 , which differs from the first embodiment in that a lever 514 is rotatably connected to the body 14 , and a ejector rod 515 is disposed in the middle of the lever 514 . The ram 515 abuts against the sliding seat 512 .

Embodiment 4

Please refer to FIG. 8 , which differs from the first embodiment in that:

An outer surface of the piston 51 is recessed with an attachment groove, and an O-ring 518 is mounted in the attachment groove. The piston 51 is slidably sealed to the peripheral wall 152 by an O-ring 518.

The pressure relief passage 41 is provided in the body portion 10, and the control seat 42 is movable relative to the body portion 10. The pressure relief passage 41 includes a first through hole 413 penetrating the chassis, a second through hole 414 penetrating the outer casing 143, and a cavity connecting the first through hole 413 and the second through hole 414 and interposed between the peripheral wall and the outer casing. The body 415; the control seat is movably connected to the outer casing and moves between a sealed first through hole 413 and a distance from the first through hole 413.

Embodiment 5

Please refer to FIG. 9 , which differs from the fourth embodiment in that the ring groove 13 is attached with an elastic sealing ring 20 having a base portion and an outer edge portion extending outwardly and downwardly from the base portion to enhance the sealing. Performance, and can also be exhausted outward through the extension when the piston is exhausted, the extension is similar to the one-way valve principle.

Embodiment 6

Please refer to FIG. 10, which differs from the fourth embodiment in that:

The ring groove 13 is attached with an elastic sealing ring 20, and the elastic sealing ring has an n-shaped structure, the n-shaped opening faces outward, and the outer ring portion functions as an anti-slip, and the inner ring is a sealing function.

The inner diameter of the communication port is equal to the inner diameter of the peripheral wall.

Example 7

Please refer to FIG. 11 , which differs from the fourth embodiment in that it further includes a first rocker 45 pivotally connected to the outer wall of the outer casing and one end pivotally connected to the control seat for passing the first rocker. One end of the outer pull control seat to overcome the elastic force to relieve pressure.

Example eight

Referring to FIG. 12, it differs from the first embodiment in that, in the embodiment, the outer casing has a rectangular structure.

Example nine

Referring to FIG. 13, it differs from the first embodiment in that, in the embodiment, the outer casing has a profiled structure.

Example ten

Please refer to FIG. 14, which differs from the first embodiment in that:

The adsorption plane is provided with two concentric circular ring grooves 13, and each of the ring grooves 13 is connected with an elastic sealing ring 20 to increase the sealing performance.

The top surface of the piston is provided with a sealing piece 53, which is sealed when the sealing piece abuts against the ring wall. At this time, the outer surface of the piston and the peripheral wall do not have to be sealed.

Embodiment 11

Please refer to FIG. 15 , which differs from the fourth embodiment in that it further includes a second rocker 46 pivotally connected to the chassis at one end and pivotally connected to the control seat at one end to be connected through the other end of the second rocker There is an operating lever 47 which extends out of the jacket for the user to operate. The user can drive the second rocker to rotate by the operating lever to drive the control seat to move.

Example twelve

It differs from the first embodiment and the fourth embodiment in that the control seat rotates relative to the piston or the body portion, and the pressure is controlled by rotation, and the rotary connection is adopted, and the pressure-relieving elastic body can be saved as needed.

The above is only the preferred embodiment of the present invention, and thus the scope of the present invention is not limited thereto, that is, equivalent changes and modifications made in accordance with the scope of the invention and the contents of the specification should still be covered by the present invention. Within the scope.

Industrial applicability

In the adsorption device of the present invention, the negative pressure generating mechanism cooperates with the adsorption chamber (12) to generate a negative pressure in the adsorption chamber (12) by the negative pressure generating mechanism, and the negative pressure deforms the elastic sealing ring (20) to seal the adsorption chamber. (12), a static friction force is generated between the elastic sealing ring (20) and the object to be adsorbed, and the adsorption device is adsorbed on the object to be adsorbed by the static friction force, and the device can be industrially produced and applied.

Claims

The adsorption device comprises a body portion (10) made of a hard material, the body portion (10) is provided with a negative pressure generating mechanism, characterized in that the body portion (10) is provided with an adsorption plane (11) and an adsorption chamber (12) The adsorption chamber (12) is provided with an opening (121) at the adsorption plane (11); the adsorption plane (11) is recessed with a ring groove (13), and the ring groove (13) is attached to the elastic a sealing ring (20) having a portion protruding from the adsorption plane (11); the negative pressure generating mechanism cooperates with the adsorption chamber (12) to generate a negative pressure in the adsorption chamber (12) by the negative pressure generating mechanism The negative pressure deforms the elastic sealing ring (20) to seal the adsorption chamber (12) to generate a static friction force between the elastic sealing ring (20) and the object to be adsorbed, and the adsorption device is adsorbed to the object to be adsorbed by the static friction force;

A pressure relief passage (41) is also provided, the pressure relief passage (41) having an inner port that opens the adsorption chamber (12) and an outer port that can be connected to the outside air pressure.
The adsorption device according to claim 1, further comprising a control seat (42), the control seat (42) is engaged with the pressure relief passage (41) and is movable between a pressure relief state and a sealed state, and is located at the discharge The pressure relief passage (41) is unobstructed when the pressure is in the state, and the pressure relief passage (41) is blocked when it is in the sealed state.
The adsorption device according to claim 1 or 2, wherein the body portion (10) comprises a base (15) and a body (14), the base (15) having a chassis (151) and being fixed to the chassis (151) a top peripheral wall (152), the body (14) is fixed to the base (15), the bottom surface of the chassis (151) is the above adsorption plane (11);

The negative pressure generating mechanism includes a piston (51) slidably coupled in the peripheral wall (152) and a absorbing elastomer (52) connecting the piston (51) and the body portion (10), the base (15) and the piston (51) Between the above-mentioned adsorption chamber (12) or the adsorption chamber (12), the connection port (121) is provided through the chassis (151).
The adsorption device according to claim 3, wherein the piston (51) protrudes from the extension shaft (511), and the body (14) has an attachment sleeve (141) attachable to the peripheral wall (152). And a ring wall (142) extending inwardly from a periphery of the mounting sleeve (141), the piston (51) having a cross-sectional area greater than a cross-sectional area of the inner wall of the annular wall (142), the protruding shaft (511) passing through the annular wall (142) The inner hole; a sliding seat (512) attached to the end of the extension shaft (511); the adsorption elastic body (52) abuts between the sliding seat (512) and the ring wall (142).
The adsorption device according to claim 4, further comprising a knob (513) rotatably coupled to the body (14), the knob (513) being coupled to the sliding seat (512) for being driven by the rotary knob (513) The piston (51) moves downward.
The adsorption device according to claim 4, wherein a lever (514) rotatably coupled to the body (14) is disposed, and a ram (515) is disposed in a middle portion of the lever (514), and the ejector pin (515) is abutted against Sliding seat (512).
The adsorption device according to claim 2, characterized in that the pressure relief passage (41) is provided in the body portion (10), and the control seat (42) is movable relative to the body portion (10).
The adsorption device according to claim 2, characterized in that the pressure relief passage (41) is provided at the piston (51), and the control seat (42) is movable relative to the piston (51).
The adsorption device according to claim 8, wherein:

The body portion (10) includes a base (15) and a body (14) having a chassis (151) and a peripheral wall (152) fixed to a top surface of the chassis (151), the body (14) being fixed In the base (15), the bottom surface of the chassis (151) is the above-mentioned adsorption plane (11);

The negative pressure generating mechanism includes a piston (51) slidably coupled in the peripheral wall (152) and a absorbing elastomer (52) connecting the piston (51) and the body portion (10), the base (15) and the piston (51) Between the above-mentioned adsorption chamber (12) or the adsorption chamber (12), the connection port (121) is provided through the chassis (151); the piston (51) protrudes from the extension shaft (511);

The body (14) has an attachment sleeve (141) attachable to the outer wall (152) and a ring wall (142) extending inwardly from the periphery of the attachment sleeve (141); the piston (51) has a larger cross-sectional area a cross-sectional area of the inner wall of the annular wall (142), the protruding shaft (511) passes through the inner hole of the annular wall (142); and a sliding seat (512) attached to the end of the protruding shaft (511); the adsorbing elastic body (52) abutting between the sliding seat (512) and the ring wall (142);

The pressure relief passage (41) includes a through hole (411) penetrating the piston (51) and a pressure relief hole (412) provided in the sliding seat (512), and the control seat (42) is slidable relative to the sliding seat (512) A pressure relief elastomer (43) is provided for the piston (51) and the control seat (42).
The adsorption device according to claim 9, wherein the control seat (42) has a pressing rod (421), and the control seat (42) has a cross-sectional area larger than a cross-sectional area of the pressure relief hole (412), and the pressing rod ( 421) A pressure relief gap is left between the pressure relief hole (412) and the pressure relief hole (412) and the pressing rod (421).
A adsorption device according to claim 7, wherein:

The body portion (10) includes a base (15) and a body (14) having a chassis (151) and a peripheral wall (152) fixed to a top surface of the chassis (151), the body (14) being fixed In the base (15), the bottom surface of the chassis (151) is the above-mentioned adsorption plane (11);

The negative pressure generating mechanism includes a piston (51) slidably coupled in the peripheral wall (152) and a absorbing elastomer (52) connecting the piston (51) and the body portion (10), the base (15) and the piston (51) Between the above-mentioned adsorption chamber (12) or the adsorption chamber (12), the connection port (121) is provided through the chassis (151);

The pressure relief passage (41) includes a first through hole (413) penetrating through the chassis (151), the control seat (42) is movably connected to the body portion (10), and a top abutting body portion (10) and The pressure relief elastomer (43) of the control seat (42).
The adsorption device according to claim 1, characterized in that the adsorption plane (11) is recessed with at least two concentric grooves (13), and each of the grooves (13) is provided with an elastic sealing ring ( 20).
The adsorption device according to claim 1, characterized in that the elastic sealing ring (20) has an "n"-shaped structure, and the "n" opening faces outward.
A suction device according to claim 1, wherein the elastic sealing ring (20) has a base attached to the annular groove (13) and an outer edge portion extending outwardly and downwardly from the base.