CN207497327U - Vacuum cup - Google Patents

Abstract

The utility model provides a kind of vacuum cup, including cup lid and cup body, wherein, cup lid includes outer cover, inner cover, pressure release seat and vacuum elements, the first sealing ring is provided on the lower end periphery wall of inner cover, the first sealing ring seals rim of a cup, and the first vacuum orifice is provided on the bottom wall of inner cover, the first check valve is provided at first vacuum orifice, pressure relief opening is additionally provided on the bottom wall of inner cover；Pressure release seat tool has the chamber of upper end opening, and the lower end of pressure release seat is provided with the second sealing ring, and the second sealing ring is blocked on pressure relief opening, and the second vacuum orifice being connected with the first vacuum orifice is provided on the bottom of chamber；Vacuum elements include air pump inner cylinder and air pump inner cylinder foundation ring, and air pump inner cylinder foundation ring cooperatively forms evacuated chamber with chamber, resetting spring is provided between the bottom of chamber and air pump inner cylinder foundation ring.The vacuum cup of the utility model is not only unpicked and washed conveniently, but also anti-leak better function, easy to carry, appearance looks elegant.

Description

Vacuum cup

Technical field

It is more particularly to a kind of to be convenient for tearing open available for fresh-keeping storages such as food, beverages the utility model is related to liquid container The vacuum cup washed.

Background technology

When food and beverage are contacted with air, easily by the dioxygen oxidation in air, so as to septic yeast.In order to extend food Above-mentioned substance is often stored in the container of closing by the storage time of product and beverage, people.But in existing closed container Still the presence of air is had, can still generate corrosiveness so that the holding time of food and beverage is not grown, fresh-keeping quality Also it is unreliable.

A kind of existing fresh-keeping cup, is equipped with bleeding point on the cup lid of fresh-keeping cup, and bleeding point has the function of self sealss, taking out A pump bowl is connected on gas port, the air in fresh-keeping cup can be extracted out, so as to fulfill vacuum freshness retaining.But this fresh-keeping cup It needs to realize by pump bowl and vacuumize, carrying is inconvenient.

The applicant discloses in the utility model patent of Publication No. CN206032211U that August in 2016 is submitted on the 29th A kind of " vacuum freshness retaining juice glass ", the vacuum freshness retaining juice glass include cup body and cover, and cup lid includes head cover and bottom cover, on bottom cover Equipped with the first stomata, head cover is equipped with first through hole；The air pump being arranged on cup lid, air pump is including in air pump positioning tube, air pump Cylinder and air pump outer barrel are discharged the air in cup body by pressing compression pump.It can will be in cup body by the vacuum freshness retaining juice glass Air extraction, have the function that fresh-keeping, and air pump is set up directly on cup lid, easy to carry.But the cup of this juice glass Lid dismounting is inconvenient, it is difficult to be cleaned to cup lid inside；When juice glass is inverted, the liquid in cup body is easy to from cup lid The first stomata at leak；And the juice glass does not have pressure relief device, vacuumizes rear cup lid and is difficult to open, it is inconvenient for use.

Invention content

The purpose of this utility model is to provide a kind of vacuum cup convenient for dismounting and washing, sealing effect is good and easy to carry.

To achieve these goals, vacuum cup provided by the utility model includes cup lid and cup body, wherein, cup lid includes outer Lid, inner cover, pressure release seat and vacuum elements, the lower end inside of outer cover are provided with the first spiral shell with being adapted on the outside of the rim of a cup of cup body Line；The upper end of inner cover and the upper end of outer cover connect, and annular gap is formed between outer cover and inner cover, is set on the lower end periphery wall of inner cover The first sealing ring is equipped with, rim of a cup is located in annular gap, and the first sealing ring seals rim of a cup, is provided on the bottom wall of inner cover and cup The first vacuum orifice that the inner cavity of body is connected, is provided with the first check valve at the first vacuum orifice, the first check valve control the The opening and closing of one vacuum orifice is additionally provided with the pressure relief opening being connected with the inner cavity of cup body, the internal perisporium of inner cover on the bottom wall of inner cover On be provided with the second screw thread；Pressure release seat tool has the chamber of upper end opening, is provided on the periphery wall of pressure release seat and the second screw thread phase The third screw thread of adaptation, the lower end of pressure release seat are provided with the second sealing ring, and the second sealing ring is blocked on pressure relief opening, the bottom of chamber The second vacuum orifice being connected with the first vacuum orifice is provided in portion；Vacuum elements include air pump inner cylinder and air pump inner cylinder bottom Circle, air pump inner cylinder are set on air pump inner cylinder foundation ring, and positioning is formed at the position of air pump inner cylinder and air pump inner cylinder foundation ring phase fitting Slot is provided with third sealing ring in locating slot, and third sealing ring and the inner wall of pressure release seat are interference fitted, the upper end setting of locating slot There is at least one exhaust outlet, from exhaust outlet to the gap between third sealing ring and the slot bottom of locating slot again to third sealing ring Gap between lower edge and the lower edge of locating slot forms exhaust passage；Air pump inner cylinder foundation ring cooperatively forms evacuated chamber with chamber, Resetting spring is provided between the bottom of chamber and air pump inner cylinder foundation ring.

As seen from the above technical solution, there are two vacuum orifices for setting on cup lid, can improve the leakproofness of cup lid, prevent Liquid leakage can open and close pressure relief opening by pressure release seat, control the vacuum environment in cup body, be easy to open cup lid, cup It is convenient for disassembly and assembly by thread fitting between the pressure release seat and inner cover of lid, cup lid can be dismantled and cleaned.

Further embodiment is that cup lid further includes self-locking knob, and self-locking knob is set on air pump inner cylinder, air pump inner cylinder Periphery wall is provided with sliding slot in axial direction, the upper end opening of sliding slot is more than the underpart opening of sliding slot, in the upper of sliding slot Limited step is formed between end and the lower end of sliding slot, the clamping block being adapted with sliding slot is provided on self-locking knob, is locked Block can be slided along sliding slot, and clamping block can be connected on limited step by rotary self-locking knob.

As it can be seen that vacuum elements can be pressed into evacuated chamber by self-locking knob, table of the vacuum elements from cup lid is not allowed Face is protruded, and is convenient for carrying, and more beautiful.

Further embodiment is that the second check valve is provided at the second vacuum orifice, and the second check valve control second is taken out true The opening and closing eated dishes without rice or wine.

As it can be seen that two check valves of setting can play the role of double insurance, one of check valve has damaged another It can also play a role, and two check valves can also further function as anti-leak and prevent liquid from entering the work in air extractor With.

Further scheme is that the bottom of pressure release seat has the first mounting base to raise up, air pump inner cylinder foundation ring Top has the second downwardly convex mounting base, and the both ends of resetting spring are respectively sleeved at the first mounting base and the second mounting base On.Second vacuum orifice is arranged in the axial direction of the first mounting base.Cushion chamber is formed between first mounting base and inner cover, first takes out Vacuum port is located at the bottom of cushion chamber, the setting of first the second vacuum orifice of vacuum orifice face.

It can be seen that resetting spring is prevented to the position-limiting action of resetting spring by the first mounting base and the second mounting base Offset, resetting spring are more stablized in rebound；The effect of cushion chamber can improve the leak preventing effect of cup lid.

Further embodiment is that the first sealing ring and the second sealing ring are U-shaped sealing ring.First sealing ring and second close The ear of protrusion is both provided in seal.

As it can be seen that U-shaped sealing ring facilitates installation, and leakage port can be preferably blocked, setting ear, which facilitates, is removed.

Further embodiment is that third sealing ring is O-ring seals.

Further scheme is that annular convex edge and convex block are provided on the upper end peripheral wall of inner cover, and convex block is located at convex annular The top on edge, forms card slot between convex block and annular convex edge, on the upper end peripheral wall of outer cover with card slot is corresponding is provided with fixture block, Fixture block is connected in card slot.

It can be seen that being connected by way of clamping between outer cover and inner cover, handling are quite convenient to.

Description of the drawings

Fig. 1 is the structure chart of the utility model vacuum cup embodiment.

Fig. 2 is the partial sectional view of the utility model vacuum cup embodiment.

Fig. 3 is the structural exploded view of the cup lid of the utility model vacuum cup embodiment.

Fig. 4 is the structure chart of the inner cover of the utility model vacuum cup embodiment.

Fig. 5 is the structure chart of the pressure release seat of the utility model vacuum cup embodiment.

Fig. 6 is the structural exploded view of the vacuum elements of the utility model vacuum cup embodiment.

Fig. 7 is the structure chart of the self-locking knob of the utility model vacuum cup embodiment.

Fig. 8 is the structure chart of the first sealing ring of the utility model vacuum cup embodiment.

Fig. 9 is the structure chart of the second sealing ring of the utility model vacuum cup embodiment.

Figure 10 is the structure chart of the first sealed ring deformation example of the utility model vacuum cup embodiment.

The utility model is described in further detail with reference to the accompanying drawings and embodiments.

Specific embodiment

Referring to Fig. 1, Fig. 1 is the structure chart of the vacuum cup embodiment of the utility model.In the present embodiment, vacuum cup includes Cup lid 1 and cup body 2, cup body 2 can be made of materials such as plastics, glass, stainless steels, and vacuum cup is mainly used to fill fruit juice, beverage Deng, using cup lid 1 to being vacuumized in cup body 2, fresh-keeping, the storage time of the progress such as fruit juice, beverage that can be stored within It is long.

Referring to Fig. 2 and Fig. 3, Fig. 2 is the sectional view of the vacuum cup embodiment of the utility model, and Fig. 3 is the utility model The part-structure of cup body is omitted in the structural exploded view of the cup lid of vacuum cup embodiment, Fig. 2.In the present embodiment, cup body 2 is by interior Two layers of stainless steel material composition of layer 20 and outer layer 21.Cup lid 1 include outer cover 10, inner cover 11, pressure release seat 12, vacuum elements 13 and from Knob 14 is locked, the lower end inside of outer cover 10 is provided with the first screw thread 100 with being adapted on the outside of the rim of a cup of cup body 2.

Referring also to Fig. 2, Fig. 3 and Fig. 4, Fig. 4 are the structure charts of the inner cover of the vacuum cup embodiment of the utility model.Inner cover 11 upper end is connect with the upper end of outer cover 10, and annular convex edge 110 and convex block 111, convex block are provided on the upper end peripheral wall of inner cover 11 111 section is semicircle, and convex block 111 is located at the top of annular convex edge 110, and card is formed between convex block 111 and annular convex edge 110 Slot, on the upper end peripheral wall of outer cover 10 with card slot is corresponding is provided with fixture block 101, fixture block 101 is connected in card slot, by this Connection mode, the handling of outer cover 10 and inner cover 11 are very convenient.Annular gap 102, inner cover are formed between outer cover 10 and inner cover 11 The first sealing ring 15 is provided on 11 lower end periphery wall.Cup lid 1 is covered, the rim of a cup of cup body 2 is located in annular gap 102, the One sealing ring 15 seals rim of a cup.The first vacuum orifice being connected with the inner cavity of cup body 2 is provided on the bottom wall of inner cover 11 112, the first check valve 113 is provided at the first vacuum orifice 112, the first check valve 113 includes plug body part 1130 and clamping portion 1131, clamping portion 1131 passes through the first vacuum orifice 112 and plug body part 1130 is located on the first vacuum orifice 112, and first is unidirectional Valve 113 is blocked by plug body part 1130 on the first vacuum orifice 112.Be additionally provided on the bottom wall of inner cover 11 in cup body 2 The pressure relief opening 114 that chamber is connected is provided with the second screw thread 115 on the internal perisporium of inner cover 11.

Referring also to Fig. 2, Fig. 3 and Fig. 5, Fig. 5 are the structure charts of the pressure release seat of the vacuum cup embodiment of the utility model.It lets out Wedge 12 has the chamber 120 of upper end opening, and the third being adapted with the second screw thread 115 is provided on the periphery wall of pressure release seat 12 Screw thread 121, the lower end of pressure release seat 12 are arranged with the second sealing ring 16, and the second sealing ring 16 is blocked on pressure relief opening 114, chamber 120 bottom is provided with the second vacuum orifice 122 being connected with the first vacuum orifice 112, is set at the second vacuum orifice 122 There is the second check valve 123, the structure of the second check valve 123 is similar to the structure of the first check valve 113,113 He of the first check valve Second check valve 123 is made of silica gel material, has preferable elasticity, and the second check valve 123 is blocked in the second vacuum orifice On 122.First check valve 113 is installed tightly on the first vacuum orifice 112, the first check valve 113 and the first vacuum orifice 112 Upper end wall and lower end wall fitting, by the deformation of itself of the first check valve 113 first vacuum orifice 112 is opened, Under natural conditions, the first check valve 113 can well seal the first vacuum orifice 113, even if vacuum cup is inverted, in cup body 2 Liquid can not also be entered in vacuum elements 13 by the first vacuum orifice 113, have good leak resistance.Second is unidirectional There is certain gap, in vacuum, the second check valve 123 is very between the lower end wall of 123 and second vacuum orifice 122 of valve It is easily opened.In addition, two check valves of setting can also play the role of double insurance, one of check valve has damaged another It can also work.

Referring also to Fig. 2, Fig. 3 and Fig. 6, Fig. 6 are the structures point of the vacuum elements of the vacuum cup embodiment of the utility model Xie Tu.Vacuum elements 13 include air pump inner cylinder 130 and air pump inner cylinder foundation ring 131, and air pump inner cylinder 130 is set in air pump inner cylinder foundation ring On 131, locating slot 132 is formed at the position of 131 phase fitting of air pump inner cylinder 130 and air pump inner cylinder foundation ring, is set in locating slot 132 There is third sealing ring 17, third sealing ring 17 is O-ring seals, and third sealing ring 17 and the inner wall of pressure release seat 12 are interference fitted, The upper end of locating slot 132 is provided at least one exhaust outlet 133, from exhaust outlet 133 to third sealing ring 17 with locating slot 132 Gap between slot bottom arrives the gap between the lower edge of third sealing ring 17 and the lower edge of locating slot 132 and forms exhaust passage again 134（As shown by arrows in FIG.）.Air pump inner cylinder foundation ring 131 and the chamber 120 of pressure release seat 12 cooperatively form evacuated chamber, chamber Resetting spring 18 is provided between 120 bottom and air pump inner cylinder foundation ring 131.The bottom of pressure release seat 12 has the to raise up One mounting base 124, the top of air pump inner cylinder foundation ring 131 have the second downwardly convex mounting base 1310, and the two of resetting spring 18 End is respectively sleeved in the first mounting base 124 and the second mounting base 1310, and the first mounting base 124 and the second mounting base 1310 are to multiple Position spring 18 plays the role of limiting, prevents resetting spring 18 from deviating.Second vacuum orifice 122 is arranged on the first mounting base 124 Axial direction on.Cushion chamber 116 is formed between first mounting base 124 and inner cover 11, the first vacuum orifice 112 is located at cushion chamber 116 Bottom, and 112 the second vacuum orifice of face 122 of the first vacuum orifice is set, and two benefits vacuumized of setting are can to rise To the effect of double protection, gas leakage is prevented；The fluid seepage when effect of setting cushion chamber 116 can prevent the vacuum cup to be inverted.Gas The periphery wall of pump inner cylinder 130 is provided with sliding slot 1301 in axial direction, the upper end opening of sliding slot 1301 is more than sliding slot 1301 Underpart opening, between the upper end of sliding slot 1301 and the lower end of sliding slot 1301 formed limited step 1302.In air pump The mounting hole 1303 of the downward concave shape squarely in upper end of cylinder 130, pressing handle 135 are mounted on gas by installing protrusion 1350 Pump the upper end of inner cylinder 130.

Referring also to Fig. 2, Fig. 3, Fig. 6 and Fig. 7, Fig. 7 are the knots of the self-locking knob of the vacuum cup embodiment of the utility model Composition.Self-locking knob 14 is set on air pump inner cylinder 130, and the clamping block being adapted with sliding slot 1301 is provided on self-locking knob 14 140, clamping block 140 can be slided along sliding slot 1301, and clamping block 140 can be connected to limited step 1302 by rotary self-locking knob 14 On.The lower end outer of self-locking knob 14 is provided with convex block 141, also has the annular groove 142 that Open Side Down on self-locking knob 14, The upper end of pressure release seat 12 is provided with the annular protrusion 124 to match with annular groove 142, and annular groove 142 is set in convex annular It rises on 124, and convex block 141 is caught in the upper end of pressure release seat 12.

Referring to Fig. 8, Fig. 8 is the structure chart of the first sealing ring of the vacuum cup embodiment of the utility model.In the present embodiment In, the first sealing ring 15 is U-shaped sealing ring, and U-shaped sealing ring refers to that the section of sealing ring takes the shape of the letter U, i.e., in the first sealing ring 15 U-shaped groove 150 is formed on internal perisporium, the first sealing ring 15 is mounted on to the lower end periphery wall of inner cover 11 by U-shaped groove 150 Annular convex edge 117（Referring to Fig. 2）On.The upper end outer of first sealing ring 15 is provided with the ear 151 of protrusion, and ear 151 can be with Facilitate and remove the first sealing ring 15 from the annular convex edge 117 of inner cover 11.

Referring to Fig. 9, Fig. 9 is the structure chart of the second sealing ring of the vacuum cup embodiment of the utility model.In the present embodiment In, the second sealing ring 16 is also U-shaped sealing ring, and U-shaped groove 160 is formed on the internal perisporium of the second sealing ring 16, recessed by U-shaped Second sealing ring 16 is mounted on the annular convex edge 127 of the lower end periphery wall of pressure release seat 12 by slot 160（Referring to Fig. 2）On.Second is close Along the ear 161 for being provided with protrusion in the lower end of seal 16, ear 161 can facilitate the second sealing ring 16 from pressure release seat 12 It is removed in annular convex edge 127.

The application method of the vacuum cup of the utility model is described in detail with reference to Fig. 1 to Fig. 9.

After assembling cup lid 1, cup lid 1 is covered in cup body 2, and screws cup lid 1 so that cup lid 1 is sealed in opening for cup body 2 Mouth end.For rotation pressure release seat 12 so that the second sealing ring 16 blocks pressure relief opening 114, rotation self-locking knob 14 makes it by lock-out state It is changed into unlocked state, resetting spring 18 pushes vacuum elements 13 to move up under the rebound effect of itself, third sealing Circle 17 is tightly attached to downwards its downward frictional force effect by the inner wall of pressure release seat 12 lower end of locating slot 132, third sealing 17 are enclosed by the clearance seal between the lower edge of third sealing ring 17 and the lower edge of locating slot 132 so that exhaust passage 134 is closed. During air pump inner cylinder foundation ring 131 moves up, pumping that the chamber 120 of air pump inner cylinder foundation ring 131 and pressure release seat 12 cooperatively forms The volume increase of vacuum chamber since exhaust passage 134 is closed, vacuumizes indoor pressure and reduces, the pressure in cup body 2 is big In vacuumizing indoor pressure, air pushes open the first check valve 113 and the second check valve 116 in cup body 2 enter evacuated chamber It is interior, until cup body 2 and vacuumizing indoor pressure and reaching balance again.

When resetting spring 18 is restored to nature, vacuum elements 13 no longer move up, and push down on pressing handle 135, vacuum elements 13 is driven to move down, third sealing ring 17 acts on its upward frictional force by the inner wall of pressure release seat 12 It is tightly attached to the upper end of locating slot 132 upwards, the gap between the lower edge of third sealing ring 17 and the lower edge of locating slot 132 is opened, So that exhaust passage 134 is opened, and during air pump inner cylinder foundation ring 131 moves down, air pump inner cylinder foundation ring 131 and pressure release seat 12 The volume for the evacuated chamber that chamber 120 cooperatively forms reduces, and since exhaust passage 134 is opened, vacuumizes indoor air and passes through Exhaust passage 134 is discharged, and the first check valve 113 and the second check valve 116 are under the action of its own gravity and ambient atmosphere pressure It tightly blocks on the first vacuum orifice 112 and the second vacuum orifice 122, prevents air from entering in cup body 2, until can not be downward Vacuum elements 13 are pushed, resetting spring 18 is in compressive state.Again decontrol pressing handle 135, resetting spring 18 itself Vacuum elements 13 is pushed to move up under rebound effect, repeats previous step, the air in cup body 2 is extracted out, so recycled, Until vacuum is formed in cup body 2.

When needing to open vacuum cup, rotation pressure release seat 12 so that the second sealing ring 16 and pressure release seat 12 together to moving up Dynamic, pressure relief opening 114 is opened, and air enters from pressure relief opening 114 in cup body 2, releases the vacuum in vacuum cup, it is easier to open.

All it is to be connected by way of clamping or thread fitting between each component of the cup lid of the vacuum cup of the utility model Connect, thus remove it is very convenient, it is convenient that it is cleaned.

The vacuum cup of the utility model can also be used as thermal insulation cup, and the first sealing ring 15 is changed to as shown in Figure 10 Sealing ring 30, the structure of sealing ring 30 is similar to the structure of the first sealing ring 15, sealing ring 30 be also a kind of U-shaped sealing ring, U-shaped groove 300 is formed on the internal perisporium of sealing ring 30, sealing ring 30 is mounted on outside the lower end of inner cover 11 by U-shaped groove 300 In the annular convex edge 117 of peripheral wall.The upper end outer of sealing ring 30 is again provided with the ear 301 of protrusion.Sealing ring 30 and first Sealing ring 15 difference lies in：Sealing ring 30 is the sealing ring of one end open, and the bottom of sealing ring 30 is blind end 302, still First sealing ring 15 is the sealing ring that both ends are opening.It, can be effective since blind end 302 is covered in the bottom of inner cover 11 Distributing for heat is prevented, so as to play the role of heat preservation.

Certainly, above-described embodiment is only the preferable embodiment of the utility model, and when practical application can also have more Variation, for example, the first sealing ring is O-ring seals；Or in simple change of cup body structure etc..These change equally can be with Realize the purpose of this utility model, within the spirit and principle of the utility model, any modification for being made, equivalent replacement, Improve etc., it should be included in the protection domain of the utility model claims.

Claims (10)

1. vacuum cup, including cup lid and cup body, it is characterised in that：

The cup lid includes outer cover, inner cover, pressure release seat and vacuum elements, and the lower end inside of the outer cover is provided with and the cup body Rim of a cup on the outside of the first screw thread for being adapted；

The upper end of the inner cover is connect with the upper end of the outer cover, and annular gap, institute are formed between the outer cover and the inner cover It states and the first sealing ring is provided on the lower end periphery wall of inner cover, the rim of a cup is located in the annular gap, first sealing Circle seals the rim of a cup, and the first vacuum orifice being connected with the inner cavity of the cup body is provided on the bottom wall of the inner cover, The first check valve is provided at first vacuum orifice, first check valve controls the opening and closing of first vacuum orifice, The pressure relief opening being connected with the inner cavity of the cup body is additionally provided on the bottom wall of the inner cover, is set on the internal perisporium of the inner cover There is the second screw thread；

The pressure release seat tool has the chamber of upper end opening, is provided on the periphery wall of the pressure release seat and is mutually fitted with second screw thread The third screw thread matched, the lower end of the pressure release seat are provided with the second sealing ring, and second sealing ring is blocked in the pressure relief opening On, the second vacuum orifice being connected with first vacuum orifice is provided on the bottom of the chamber；

The vacuum elements include air pump inner cylinder and air pump inner cylinder foundation ring, and the air pump inner cylinder is set in the air pump inner cylinder foundation ring On, the air pump inner cylinder and the air pump inner cylinder foundation ring phase suit place form locating slot, and it is close to be provided with third in the locating slot Seal, the inner wall of the third sealing ring and the pressure release seat are interference fitted, and the upper end of the locating slot is provided at least one Exhaust outlet is sealed from the exhaust outlet to the gap between the third sealing ring and the slot bottom of the locating slot to the third Gap between the lower edge of circle and the lower edge of the locating slot forms exhaust passage；

The air pump inner cylinder foundation ring cooperatively forms evacuated chamber, the bottom of the chamber and the air pump inner cylinder bottom with the chamber Resetting spring is provided between circle.

2. vacuum cup according to claim 1, it is characterised in that：

The cup lid further includes self-locking knob, and the self-locking knob is set on the air pump inner cylinder, outside the air pump inner cylinder Peripheral wall is provided with sliding slot in axial direction, the upper end opening of the sliding slot is more than the underpart opening of the sliding slot, in institute It states and limited step is formed between the upper end of sliding slot and the lower end of the sliding slot, be provided on the self-locking knob and the cunning The clamping block that slot is adapted, the clamping block can be slided along the sliding slot, and the clamping block can be supported by rotating the self-locking knob It is connected on the limited step.

3. vacuum cup according to claim 1, it is characterised in that：

The second check valve is provided at second vacuum orifice, second check valve controls opening for second vacuum orifice It closes.

4. vacuum cup according to claim 1, it is characterised in that：

The bottom of the pressure release seat has the first mounting base to raise up, and the top of the air pump inner cylinder foundation ring is with downwardly convex The second mounting base risen, the both ends of the resetting spring are respectively sleeved in first mounting base and second mounting base.

5. vacuum cup according to claim 4, it is characterised in that：

Second vacuum orifice is arranged in the axial direction of first mounting base.

6. vacuum cup according to claim 5, it is characterised in that：

Cushion chamber is formed between first mounting base and the inner cover, first vacuum orifice is located at the bottom of the cushion chamber Portion, the second vacuum orifice described in the first vacuum orifice face are set.

7. vacuum cup according to any one of claims 1 to 6, it is characterised in that：

First sealing ring and second sealing ring are U-shaped sealing ring.

8. vacuum cup according to claim 7, it is characterised in that：

The ear of protrusion is both provided on first sealing ring and second sealing ring.

9. vacuum cup according to any one of claims 1 to 6, it is characterised in that：

The third sealing ring is O-ring seals.

10. vacuum cup according to any one of claims 1 to 6, it is characterised in that：

Annular convex edge and convex block are provided on the upper end peripheral wall of the inner cover, the convex block is located at the top of the annular convex edge, Form card slot between the convex block and the annular convex edge, on the upper end peripheral wall of the outer cover with the corresponding setting of the card slot There is fixture block, the fixture block is connected in the card slot.