CN214629894U

CN214629894U - Atomizer

Info

Publication number: CN214629894U
Application number: CN202120269978.3U
Authority: CN
Inventors: 丁毅; 张海波; 黎荣全; 翟公高; 邹志安
Original assignee: Shenzhen Cilicon Technology Co ltd
Current assignee: Shenzhen Cilicon Technology Co ltd
Priority date: 2021-01-29
Filing date: 2021-01-29
Publication date: 2021-11-09
Anticipated expiration: 2031-01-29

Abstract

The utility model provides an atomizer, arrive including the oil cup, set up breather pipe in the oil cup and set up atomizing core in the breather pipe, the outer wall of breather pipe with form the stock solution chamber between the inner wall of oil cup, the outer wall of breather pipe be equipped with be used for with the inlet channel of stock solution chamber intercommunication, atomizing core with inlet channel corresponds, atomizing core includes the heat-generating body and wraps up the oil cotton of leading of heat-generating body periphery, the outer wall of heat-generating body is equipped with the return air district, it fills to lead the cotton part of oil in the return air district, it is in to lead the oil cotton the gas tightness in return air district is less than the gas tightness in other regions. The utility model discloses the weeping phenomenon is difficult for appearing, and the leak protection is strong to can guarantee the taste of suction.

Description

Atomizer

[ technical field ] A method for producing a semiconductor device

The utility model relates to an electronic atomization field, concretely relates to atomizer.

[ background of the invention ]

Current atomizer, its atomizing core generally include cylindric heat-generating body and parcel at the oil guide of heat-generating body periphery cotton, and the atomizer is in the in-process of transportation, transport or placing for a long time, and the atomized liquid can slowly permeate between oil guide cotton and the heat-generating body, and the atomized liquid spills easily to the weeping phenomenon can appear, when the condition of the remaining little atomized liquid of atomizer, the user can also appear the frizing phenomenon when the suction, has influenced the taste of suction.

[ Utility model ] content

The utility model aims to provide an atomizer is difficult for appearing the weeping phenomenon, and the leak protection is strong in the effect to can guarantee the taste of suction.

In order to achieve the above object, the utility model provides a technical scheme is that, an atomizer is provided, arrive including the oil cup, set up breather pipe in the oil cup and set up atomizing core in the breather pipe, the outer wall of breather pipe with form the stock solution chamber between the inner wall of oil cup, the outer wall of breather pipe be equipped with be used for with the inlet channel of stock solution chamber intercommunication, atomizing core with inlet channel corresponds, atomizing core includes the heat-generating body and wraps up the oil cotton of leading of heat-generating body periphery, the outer wall of heat-generating body is equipped with the return-air zone, it fills to lead the oil cotton part in the return-air zone, it is in to lead the oil cotton the gas tightness in return-air zone is less than the gas tightness in other regions.

As a preferable technical scheme, the gas return area is a groove, and the groove extends along the axial direction of the heating element.

Preferably, the groove penetrates through both ends of the heating element.

As a preferred technical scheme, the grooves are multiple, and the grooves are arranged at intervals along the outer wall of the heating body.

As the preferred technical scheme, the gas return zone is an annular groove, and the annular groove is arranged to the middle of the outer wall of the heating body along the circumferential direction of the heating body.

As a preferable technical scheme, the number of the ring grooves is one, and the position of the ring groove corresponds to the liquid inlet channel.

As the preferred technical scheme, the liquid inlet channel is in a circular hole shape, and the inner diameter of the liquid inlet channel is 0.6-1.0 mm.

According to the preferable technical scheme, the base is installed at one end of the oil cup, the air suction port is formed in the other end of the oil cup, the connecting piece communicated with the air suction port and the sealing piece used for sealing the liquid storage cavity are arranged in the oil cup, the sealing piece is fixed to the base, one end of the vent pipe is installed on the sealing piece, and the other end of the vent pipe is installed on the connecting piece through the silica gel piece.

As a preferred technical scheme, a base is installed at one end of the oil cup, a suction nozzle is installed at the other end of the oil cup, an insulating part is arranged in the base, one end of the vent pipe is installed on the insulating part, and the other end of the vent pipe is installed on the suction nozzle.

As a preferred technical scheme, a connecting assembly is installed at one end of the oil cup, a suction nozzle is installed at the other end of the oil cup, the connecting assembly and the oil cup can rotate relatively, the suction nozzle and the oil cup are relatively fixed, one end of the vent pipe is fixedly installed on the connecting assembly, and the other end of the vent pipe is movably installed on the suction nozzle.

As the preferred technical scheme, be equipped with in the oil cup and be used for carrying out the sealing member sealed to the stock solution chamber, the sealing member with relatively fixed between the oil cup, thereby through rotating coupling assembling can drive the breather pipe rotates to the second position from the primary importance, when the breather pipe is located the primary importance, the inlet channel is blocked to the sealing member, thereby the stock solution chamber with the inlet channel does not communicate, when the breather pipe is located the second place, the inlet channel is not blocked to the sealing member, thereby the stock solution chamber with the inlet channel communicates.

As preferred technical scheme, the sealing member includes the ring body and follows the convex part that the axial was stretched out is followed to the one end of ring body, the ring body cover is established the periphery of breather pipe, just the inner wall of ring body with the outer wall sealing connection of breather pipe the outer wall of ring body with the inner wall sealing connection of oil cup, when the breather pipe is located the first position, the convex part blocks inlet channel, when the breather pipe is located the second position, the convex part does not block inlet channel.

The utility model discloses a construct the return air district at the outer wall of heat-generating body, lead the gas tightness of oil cotton in the return air district and be less than other regional gas tightness. Because the air tightness of the oil guide cotton in other areas is higher, atomized liquid is not easy to seep out in the process of transportation, carrying or long-time placement of the atomizer, and the phenomenon of liquid leakage or oil flying is avoided. Because it is lower to lead the gas tightness of oil cotton in the return-air district, at the in-process that the atomizer suction was used, the return-air district can be supplemented fast to the outside gas and the liquid storage chamber is got into in suitable time, and the guarantee atomized liquid can enter into liquid inlet channel from the liquid storage chamber smoothly in to can guarantee the feed liquid speed, guarantee the taste of suction, satisfy user's suction and experience.

[ description of the drawings ]

To further disclose the specific technical content of the present disclosure, please refer to the attached drawings, wherein:

fig. 1 is a schematic cross-sectional view of an atomizer according to a first embodiment of the present invention;

FIG. 2 is a schematic view showing a structure of a heat generating body of the atomizer shown in FIG. 1;

FIG. 3 is a schematic plan view of a heating element of the atomizer shown in FIG. 1;

fig. 4 is a schematic structural diagram of an atomizer according to a second embodiment of the present invention;

FIG. 5 is an exploded view of the atomizer shown in FIG. 4;

FIG. 6 is a schematic cross-sectional view of the atomizer shown in FIG. 4;

FIG. 7 is a schematic view showing the structure of a heat-generating body of the atomizer shown in FIG. 4;

fig. 8 is a schematic structural diagram of an atomizer according to a third embodiment of the present invention;

FIG. 9 is an exploded view of the atomizer shown in FIG. 8;

FIG. 10 is a schematic cross-sectional view of the atomizer shown in FIG. 8;

fig. 11 is a schematic view of the seal of the atomizer shown in fig. 8.

Description of the symbols:

atomizer 300

Liquid storage cavity 12 of oil cup 10

Suction opening 14 of oil cup connecting piece 16

The projection 17 limits the groove 18

Liquid inlet channel 22 of breather pipe 20

Heating body 32 of atomizing core 30

Air return region 322 pin 324

Oil guide cotton 34

Base 40

Sealing element 50 ring 52

Convex part 54

Silicone member 60

Suction opening 72 of a suction nozzle 70

Air suction passage 74

Insulating member 80

Connecting ring 90

Sealing gasket 100

Bracket 120 stop block 1202

Electrode 130

Insulating ring 140

[ detailed description ] embodiments

Referring to fig. 1 to 3, an atomizer 300 according to a first embodiment of the present invention includes an oil cup 10, a vent pipe 20 disposed in the oil cup 10, an atomizing core 30 disposed in the vent pipe 20, a base 40, and a sealing member 50 disposed in the oil cup 10.

The oil cup 10 is opened at one end and is installed with the above-mentioned base 40, and the other end is provided with an air suction port 14 for a user to suck. The oil cup 10 is provided with a connecting piece 16, and the connecting piece 16 is communicated with the air suction port 14. Preferably, the connection piece 16 is integrally formed to an inner wall of the oil cup 10 at an end where the suction port 14 is provided. A liquid storage cavity 12 is formed between the outer wall of the vent pipe 20 and the inner wall of the oil cup 10 for storing atomized liquid. The sealing member 50 is used to seal the reservoir 12 and is secured to the base 40.

The vent tube 20 is mounted at one end into the seal 50 and at the other end to the connector 16 by means of a silicone element 60. Specifically, the silicone member 60 is respectively fitted to the vent pipe 20 and the adjacent end of the connector 16. The silicone member 60 serves to connect the ventilation tube 20 and the connection member 16 and also serves to seal the connection member 16 and the ventilation tube 20 to prevent the atomized liquid from entering the connection member 16, thereby ensuring the mouth feel of the suction.

The outer wall of the vent pipe 20 is provided with a liquid inlet passage 22 communicated with the liquid storage cavity 12. The atomizing core 30 corresponds to the liquid inlet channel 22. The atomized liquid in the liquid storage cavity 12 can enter the atomizing core 30 through the liquid inlet channel 22.

The atomizing core 30 includes a heating body 32 and an oil guide cotton 34 wrapped around the heating body 32. The outer wall of the heating element 32 is provided with an inward air return area 322, the oil guide cotton 34 is partially filled in the air return area 322 and is extruded by the inner wall of the vent pipe 20, and the air tightness of the oil guide cotton 34 in the air return area 322 is lower than that in other areas. Through this kind of structure, in the transportation of atomizer 300, the in-process of carrying or placing for a long time, because the gas tightness of leading oil cotton 34 in return-air area 322 is less than the gas tightness in other regions, so it is higher to lead the gas tightness of oil cotton 34 in other regions, the atomizing liquid is difficult to ooze, weeping and oil-flying phenomenon have been avoided, in the in-process that atomizer 300 suction was used, because it is lower at return-air area 322's gas tightness to lead oil cotton 34, outside gas can supply to return-air area 322 fast and get into liquid storage cavity 12 when appropriate, guarantee atomizing liquid can enter into inlet channel 22 from liquid storage cavity 12 smoothly, carry out gas-liquid exchange more easily like this, make in the liquid storage cavity 12 keep gas-liquid balance for a long time, thereby can guarantee the liquid supply speed, the taste of suction has been guaranteed, user's suction experience has been satisfied.

In this embodiment, the air return region 322 is a groove extending along the axial direction of the heating element 32, and the groove penetrates through both ends of the heating element 32. The grooves are a plurality of and are arranged at intervals along the outer wall of the heating body 32. The number of grooves in this embodiment is preferably four. It will be appreciated that the number of grooves may be set as practical. The depth, width, etc. of the grooves can be set according to actual conditions.

The cross section of the groove is arc-shaped. It will be appreciated that the cross-sectional shape of the groove may also be, for example, trapezoidal, triangular, etc. The cross-sectional shape of the groove can be set according to actual conditions.

The liquid inlet channel 22 is in a circular hole shape, and the inner diameter of the liquid inlet channel 22 is 0.6-1.0 mm. Because the outer wall of the heating element 32 is provided with the air return area 322, the inner diameter of the liquid inlet channel 22 of the utility model is 1.5-1.8 mm of the liquid inlet hole compared with the inner diameter of the prior art, which can be made smaller, and the liquid discharging speed is not influenced. Therefore, the leakage prevention effect of the nebulizer 300 can be further improved during transportation, handling, or long-term storage of the nebulizer 300.

In the present embodiment, the oil-guiding cotton 34 is, for example, a nonwoven fabric, linen cotton, or the like, and the heating element 32 is a ceramic heating element, a single heating wire, or the like.

The atomizer 300 further comprises two electrodes 130. Two electrodes 130 are used to connect with the battery rod of the electronic atomizer device. Two electrodes 130 are mounted to the base 40 and the seal 50, respectively. Two pins 324 of heat-generating body 32 are connected with two electrodes 130 respectively to can realize supplying power for heat-generating body 32 through two electrodes 130, so, can heat the atomizing liquid through heat-generating body 32 and atomize, can enter into induction port 14 through trachea 20, silica gel piece 60, connecting piece 16 after the aerial fog after the heating atomizing and the air that enters into heat-generating body 32 mix, thereby finally by the suction of user.

Referring to fig. 4 to 6, a second embodiment of the present invention provides an atomizer 300, which is different from the first embodiment in that in the present embodiment, two ends of an oil cup 10 are open, a base 40 is installed at one end of the oil cup, a suction nozzle 70 is installed at the other end of the oil cup, and the suction nozzle 70 has a suction port 72 (see fig. 6) for a user to suck.

The base 40 has mounted therein an insulator 80 and a connection ring 90. The insulator 80 includes a ring-shaped first mounting portion 82 and a ring-shaped second mounting portion 84 axially protruding from one end of the first mounting portion 82, the first mounting portion 82 being mounted in the base 40, the second mounting portion 84 facing the atomizing core 30. A connecting ring 90 surrounds the outer periphery of the second mounting portion 84.

One end of the breather pipe 20 is fitted around the outer circumference of the second mounting portion 84 and interposed between the second mounting portion 84 and the connection ring 90, and the other end is fitted into the suction passage 74 of the suction nozzle 70. The liquid inlet channel 22 of the vent pipe 20 is communicated with the liquid storage cavity 12.

A sealing gasket 100 for sealing the liquid storage cavity 12 is arranged in one end of the oil cup 10 where the suction nozzle 70 is installed. The gasket 100 is fixed to the suction nozzle 70. The end of the breather pipe 20 fitted into the suction passage 74 passes through the gasket 100.

The inner wall of the oil cup 10 is formed with an annular bulge 17 (see fig. 6), the bulge 17 is sleeved on the periphery of the vent pipe 20, the inner wall of the bulge 17 is hermetically connected with the outer wall of the vent pipe 20, and the bulge 17 is used for sealing the liquid storage cavity 12.

The oil cup 10 is provided with a sealing element 50, and the sealing element 50 is a sealing ring which is clamped between the bulge 17 and the base 40. The sealing ring is sleeved on the periphery of the breather pipe 20, the inner wall of the sealing ring is in sealing connection with the outer wall of the breather pipe 20, and the outer wall of the sealing ring is in sealing connection with the inner wall of the oil cup 10. The sealing ring has a sealing function to prevent the atomized liquid in the liquid storage cavity 12 from leaking.

As shown in FIGS. 6 and 7, the return air region 322 of the present embodiment is a ring groove provided to the middle of the outer wall of the heat-generating body 32 in the circumferential direction of the heat-generating body 32. The ring groove can achieve the technical effects. In other embodiments, the air return region 322 may also be a concave region irregularly formed on the outer wall of the heating element 32.

The number of the ring grooves is one. It is to be understood that the number of the ring grooves may also be, for example, two, etc., the two ring grooves being provided at intervals in the axial direction of the heat-generating body 32. The number of the ring grooves can be set according to actual conditions. The width, depth, etc. of the ring grooves can also be set according to the actual situation.

Preferably, the annular groove corresponds to the liquid inlet channel 22, so that the liquid supply speed can be further increased.

The cross-sectional shape of the ring groove is trapezoidal, and it can be understood that the cross-sectional shape of the ring groove can also be, for example, arc, triangle, etc., and the cross-sectional shape of the ring groove can be set according to actual conditions.

The air return region 322 may also be other concave regions regularly or irregularly formed on the outer wall of the heating element 32, for example, by forming a plurality of convex points on the outer wall of the heating element 32, and the area between the convex points forms the air return region 322.

The electrode 130 of the present embodiment is one, the electrode 130 is installed in the base 40, and the electrode 130 and the base 40 are separated by the insulating ring 140 to achieve insulation therebetween. The electrode 130 has one end near the end of the base 40 remote from the mouthpiece 70 and the other end extending into the insulator 80 opposite the atomizing core 30. One of the two pins 324 of the heating element 32 is connected to the electrode 130, and the other pin 324 is connected to the inner wall of the base 40, so that the heating element 32 can be supplied with power through the base 40 and the electrode 130.

Referring to fig. 8 to 10, a third embodiment of the atomizer 300 according to the present invention is different from the second embodiment in that two ends of the oil cup 10 are open, a connecting component is installed at one end of the oil cup 10, and a suction nozzle 70 is installed at the other end. The connecting assembly and the oil cup 10 can rotate relatively. The suction nozzle 70 and the oil cup 10 are relatively fixed. The connecting assembly includes a base 40 movably fitted to one end of the oil cup 10 and a bracket 120 installed in the base 40.

The breather pipe 20 is fixedly installed in the bracket 120 at one end and movably installed in the suction passage 74 of the suction nozzle 70 at the other end, so that the breather pipe 20 and the oil cup 10 can rotate relatively.

A gasket 100 for sealing the reservoir chamber 12 is provided in one end of the oil cup 10 where the suction nozzle 70 is installed, and the gasket 100 is fixed to the suction nozzle 70. The end of the breather pipe 20 fitted into the suction passage 74 passes through the gasket 100.

The oil cup 10 is internally provided with a sealing piece 50 for sealing the liquid storage cavity 12, and the sealing piece 50 and the oil cup 10 are relatively fixed. The base 40 of the connecting assembly is rotated to drive the breather pipe 20 to rotate from the first position to the second position, when the breather pipe 20 is positioned at the first position, the liquid inlet channel 22 is blocked by the sealing element 50, so that the liquid storage cavity 12 is not communicated with the liquid inlet channel 22, as shown in fig. 10, and therefore, in the process of transportation, carrying or long-time placement of the atomizer 300, atomized liquid in the liquid storage cavity 12 cannot enter the atomizing core 30 through the liquid inlet channel 22, the liquid leakage phenomenon cannot occur, and the leakage prevention effect can be further realized; when the vent pipe 20 is located at the second position, the sealing member 50 does not block the liquid inlet channel 22, so that the liquid storage chamber 12 is communicated with the liquid inlet channel 22, and the atomized liquid in the liquid storage chamber 12 can enter the atomizing core 30 through the liquid inlet channel 22. When the user uses atomizer 300, only need rotate coupling assembling's base 40 make breather pipe 20 rotate to the second position can, inlet channel 22 and stock solution chamber 12 intercommunication this moment, atomizing liquid can enter into atomizing core 30 through inlet channel 22, so, the user can be in aspiration 72 departments of induction port. When the user does not suck, the breather pipe 20 can be returned to the first position to block the liquid inlet channel 22 again by rotating the base 40 of the connecting assembly.

It can be understood that, when the user uses atomizer 300, also can rotate oil cup 10, through rotating oil cup 10 and then can drive sealing member 50 and rotate relative breather pipe 20, when sealing member 50 rotated to the position that does not block inlet channel 22, inlet channel 22 and stock solution chamber 12 intercommunication, the atomizing liquid in the stock solution chamber 12 can enter into atomizing core 30 through inlet channel 22 this moment, so, the user can have smoked in induction port 72 department.

Referring to fig. 11, the sealing member 50 includes a ring 52 and a protrusion 54 axially extending from one end of the ring 52, the ring 52 is sleeved on the outer periphery of the breather pipe 20, the inner wall of the ring 52 is connected to the outer wall of the breather pipe 20 in a sealing manner, and the outer wall of the ring 52 is connected to the inner wall of the oil cup 10 in a sealing manner. When the breather pipe 20 is located at the first position, the convex part 54 blocks the liquid inlet channel 22, and when the breather pipe 20 is located at the second position, the convex part 54 does not block the liquid inlet channel 22.

The side of the convex portion 54 close to the breather pipe 20 is a cambered surface which is matched with the outer wall of the breather pipe 20 to realize the blockage of the liquid inlet channel 22. The face of the projection 54 remote from the vent tube 20 is also curved and preferably flush with the outer wall of the ring body 52.

The number of the inlet channels 22 may be one or more, and the number of the protrusions 54 is the same as that of the inlet channels 22. When the number of the projections 54 is plural, the plural projections 54 are provided at intervals in the circumferential direction of the ring body 52. The number of inlet channels 22 and protrusions 54 may be set as appropriate.

The electrode 130 has one end near the end of the base 40 remote from the suction nozzle 70 and the other end extending into the holder 120. Similarly, one of the two pins 324 of the heating element 32 is connected to the electrode 130, and the other pin 324 is connected to the inner wall of the base 40, so that the heating element 32 can be supplied with power through the base 40 and the electrode 130.

In this embodiment, as shown in fig. 9 and 10, the outer wall of the bracket 120 is provided with a limiting block 1202, the inner wall of the oil cup 10 is provided with a limiting groove 18 matched with the limiting block 1202, when the vent pipe 20 is located at the first position, the limiting block 1202 abuts against one end of the limiting groove 18, when the vent pipe 20 is located at the second position, the limiting block 1202 abuts against the other end of the limiting groove 18, and through the limiting block 1202 and the limiting groove 18, the rotation of the base 40 or the oil cup 10 can be limited, and the vent pipe 20 can be conveniently rotated to the first position or the second position.

Preferably, the number of the limiting blocks 1202 and the limiting grooves 18 is two, the two limiting blocks 1202 are symmetrically arranged, and the two limiting grooves 18 are symmetrically arranged.

The outer wall of the base 40 is provided with an indication mark for indicating the rotation direction of the base 40.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. The utility model provides an atomizer, includes the oil cup, sets up breather pipe in the oil cup and set up atomizing core in the breather pipe, the outer wall of breather pipe with form the stock solution chamber between the inner wall of oil cup, the outer wall of breather pipe be equipped with be used for with the inlet channel of stock solution chamber intercommunication, atomizing core with inlet channel corresponds, its characterized in that, atomizing core includes the heat-generating body and wraps up the oil cotton of leading of heat-generating body periphery, the outer wall of heat-generating body is equipped with the return air district, it fills to lead oil cotton part in the return air district, it is in to lead oil cotton the gas tightness in return air district is less than the gas tightness in other regions.

2. The atomizer of claim 1, wherein said return air region is a groove extending in an axial direction of said heat generating body.

3. The atomizer according to claim 2, wherein said grooves penetrate both ends of said heat-generating body.

4. The atomizer of claim 2, wherein said plurality of grooves are provided at intervals along an outer wall of said heat-generating body.

5. The atomizer according to claim 1, wherein said gas return portion is an annular groove provided to a middle portion of an outer wall of said heat-generating body in a circumferential direction of said heat-generating body.

6. The atomizer of claim 5, wherein said annular channel is one, and said annular channel is positioned to correspond to said inlet passage.

7. The atomizer of claim 1, wherein said inlet channel is circular and has an internal diameter of 0.6 mm to 1.0 mm.

8. The atomizer according to claim 1, wherein a base is mounted to one end of said oil cup, and a suction port is formed at the other end of said oil cup, a connecting member communicating with said suction port and a sealing member for sealing said reservoir chamber are provided in said oil cup, said sealing member is fixed to said base, and said vent pipe is mounted to said sealing member at one end thereof and to said connecting member at the other end thereof via a silicone member.

9. The atomizer of claim 1, wherein said oil cup has a base attached to one end thereof and a suction nozzle attached to the other end thereof, an insulator being disposed within said base, and said vent tube having one end attached to said insulator and the other end attached to said suction nozzle.

10. The atomizer of claim 1, wherein said oil cup has a connecting assembly mounted at one end thereof and a suction nozzle mounted at the other end thereof, said connecting assembly and said oil cup being rotatable relative to each other, said suction nozzle and said oil cup being relatively fixed to each other, said vent tube having one end fixedly mounted to said connecting assembly and the other end movably mounted to said suction nozzle.

11. The atomizer of claim 10, wherein a sealing member is disposed in said oil cup for sealing said reservoir chamber, said sealing member and said oil cup being fixed relative to each other, said connecting member being rotatable to rotate said vent tube from a first position to a second position, said sealing member blocking said inlet passage when said vent tube is in said first position, whereby said reservoir chamber is not in communication with said inlet passage, and said vent tube being in said second position, whereby said sealing member does not block said inlet passage, whereby said reservoir chamber is in communication with said inlet passage.

12. The atomizer of claim 11, wherein said sealing member includes a ring body and a protrusion extending axially from an end of said ring body, said ring body is fitted around an outer periphery of said vent pipe, an inner wall of said ring body is sealingly connected to an outer wall of said vent pipe, an outer wall of said ring body is sealingly connected to an inner wall of said oil cup, said protrusion blocks said inlet passage when said vent pipe is in the first position, and said protrusion does not block said inlet passage when said vent pipe is in the second position.