CN115177088A

CN115177088A - Cosmetic container

Info

Publication number: CN115177088A
Application number: CN202210784068.8A
Authority: CN
Inventors: 江志荣
Original assignee: Xiamen Pengmao Mechanical Equipment Co ltd
Current assignee: Xiamen Pengmao Mechanical Equipment Co ltd
Priority date: 2022-06-28
Filing date: 2022-06-28
Publication date: 2022-10-14
Also published as: FR3136936A1; US20230413978A1; GB202212282D0; GB2620208A; GB2620208B

Abstract

The invention discloses a cosmetic container, which can realize opening and closing functions through simple rotation operation, can prevent cosmetics from leaking, and has simple structure and convenient production. The cosmetic container comprises a container body, a rotary cover, an applicator and a cover cap; the container body is used for containing cosmetics, and a connecting part is formed at one end of the container body; the end surface of the connecting part is provided with a first through hole for cosmetic to flow out; the rotary cover is rotationally matched and covered on the connecting part to form a closed communicating cavity, and the rotary cover is provided with a second through hole communicated to the communicating cavity; the applicator is arranged on the rotary cover, and the first through hole, the communication cavity and the second through hole form a cosmetic passage from the container body to the applicator; the cap is covered on the end part of the container body and is covered with a screw cap and an applicator; the communicating cavity is provided with a convex part which is integrally formed with the connecting part or the screw cap, and the convex part closes or opens the cosmetic passage along with the rotation of the screw cap.

Description

Cosmetic container

Technical Field

The invention relates to the technical field of containers, in particular to a cosmetic container.

Background

A cosmetic container for holding gel cosmetics such as toner, emulsion, eye cream, mascara, etc. generally adopts a tube-shaped container which is easy to produce, low in cost and convenient to use, and is matched with an applicator which is combined at the outlet position of the container, so that a user can conveniently and quickly apply the gel cosmetics.

The existing cosmetic container is generally covered at the discharge end of the container through a cover cap, so that an applicator is isolated from the outside, and the aim of preventing cosmetics from leaking is fulfilled. However, when a user carries the cosmetics, the cosmetics are usually placed in the bag together with other objects, the bag is prone to shake during movement of the user, so that the cosmetics container collides with other objects and is squeezed, the cap is loosened, the cosmetics are leaked and the bag is polluted, and when the cosmetics container is squeezed, excessive cosmetics are squeezed to the applicator, so that subsequent use is affected. It is therefore necessary to design a controllable switch to open and close the container and the applicator.

In the prior art, as disclosed in patent No. CN200680000214.2, "a cosmetic container", a middle cap and a packing body are disposed between a brush and a container, so that an opening of a shaft tube portion of the middle cap and an opening of the packing body can be opposite or dislocated when the middle cap is rotated, thereby achieving an opening and closing function. In addition, it is specifically disclosed in the patent that the lower cover screwed with the container is required as the mounting base of the package body, so that the cosmetic container has more accessories and a complicated structure, which in turn leads to an increase in cost and a complicated production process.

Disclosure of Invention

The invention aims to provide a cosmetic container which can realize the opening and closing function through simple rotation operation, can prevent cosmetics from leaking, has a simple structure and is convenient to produce.

In order to achieve the above purpose, the solution of the invention is:

a cosmetic container comprises a container body, a rotary cover, an applicator and a cover cap; the container body is used for containing cosmetics, and a connecting part is formed at one end of the container body; the end face of the connecting part is provided with a first through hole for cosmetic to flow out; the spiral cover is in rotating fit and covers the connecting part to form a closed communicating cavity, and a second through hole communicated to the communicating cavity is formed in the spiral cover; the applicator is mounted on the screw cap, and the first through hole, the communication chamber and the second through hole constitute a cosmetic passage from the container body to the applicator; the cap is arranged at the end part of the container body and covers the rotary cover and the applicator; the communication cavity is internally provided with a protruding part which is integrally formed with the connecting part or the screw cap, and the protruding part closes or opens the cosmetic passage along with the rotation of the screw cap.

The protruding part is arranged at the central position on the end face of the connecting part, the second through hole is arranged at the central position of the rotary cover, and the rotary cover is matched with the connecting part in a threaded connection mode; the protruding part opens or closes the second through hole along with the relative rotation of the rotary cover and the connecting part.

Preferably, one end of the second through hole, which is close to the protruding portion, is provided with a flared opening, and the radius of the flared opening in the direction facing the protruding portion is gradually increased; the end surface of the protruding part is provided with a boss matched with the bell mouth; when the device is in a closed state, the lug boss is embedded in the bell mouth.

Preferably, the end surface of the connecting part is concavely formed with a groove, the protruding part is arranged at the central part of the groove, and the first through hole is arranged at the bottom wall of the groove; the screw cap faces one side of the connecting portion and is provided with a circle of flange, and the flange is movably matched with the side wall of the groove in a sealing mode along with the relative rotation of the screw cap and the connecting portion.

Preferably, be provided with first stopper and second stopper on the global of connecting portion, the inner wall of spiral cover is provided with the movable block, the movable block along with the spiral cover with the relative rotation movable fit of connecting portion is in first stopper with between the second stopper.

Preferably, the height of the first limiting block is higher than that of the second limiting block.

Preferably, the side edges of the first limiting block and the second limiting block are provided with rotation stopping protrusions with arc-shaped surfaces, and the rotation stopping protrusions are used for enabling the movable block to be in limited fit between the first limiting block/the second limiting block and the rotation stopping protrusions.

The end part of the spiral cover is provided with a mounting cavity, and the applicator is embedded in the mounting cavity.

The applicator comprises a hollow communicating rod and a flocking sleeve arranged at one end of the communicating rod in a sleeved mode, a convex ring portion is arranged on the circumferential surface of the other end of the communicating rod, and the convex ring portion is in tight fit with the side wall of the installation cavity.

The container body is constructed of a flexible tube material.

In addition, the protruding part can be arranged at a non-central position on the end face of the connecting part, the second through hole is correspondingly arranged on a moving path of the protruding part, and the protruding part is opposite to or staggered with the second through hole along with the relative rotation of the rotary cover and the connecting part so as to close or open the second through hole.

After the technical scheme is adopted, the invention has the following technical effects:

(1) the first through hole, the communication cavity and the second through hole form a cosmetic passage from the container body to the applicator, and the protrusion part in the communication cavity closes or opens the cosmetic passage through the rotating fit of the screw cap and the connecting part, so that the anti-leakage function of cosmetics in the container body is realized, and the cosmetic container is safer and more convenient to carry;

(2) the communicating cavity between the container body and the screw cap can be filled with a part of cosmetics after use, so that the next time of use, the discharging is faster, the discharging interruption is avoided, and the user experience is improved;

(3) the bulge and the screw cap or the container body are integrally formed through a die and the existing process, so that the whole parts are fewer, the structure is simpler, the assembly efficiency is higher, and the novel screw cap and the container are suitable for large-batch production.

Drawings

FIG. 1 is a perspective view of an embodiment of the present invention;

FIG. 2 is an exploded view of an embodiment of the present invention;

FIG. 3 is a schematic view of a container body and a cap according to an embodiment of the present invention;

FIG. 4 is an exploded cross-sectional view of an embodiment of the present invention;

FIG. 5 is a front view of a closed state of an embodiment of the present invention;

FIG. 6 isbase:Sub>A cross-sectional view taken along line A-A of FIG. 5;

FIG. 7 is a cross-sectional view of a closed state of an embodiment of the present invention;

FIG. 8 is a front view of an open state of an embodiment of the present invention;

FIG. 9 is a cross-sectional view taken along line B-B of FIG. 8;

FIG. 10 is a cross-sectional view of an open position of an embodiment of the present invention;

FIG. 11 is a diagram illustrating a second arrangement of protrusions according to an embodiment of the present invention;

FIG. 12 is a schematic view of a third arrangement of protrusions according to an embodiment of the present invention;

FIG. 13 is a diagram illustrating a fourth arrangement of protrusions according to an embodiment of the present invention;

the reference numbers illustrate:

1-a container body; 10- - -a communicating cavity; 11-a connecting portion;

111- -a first via; 112- -a projection; 1121-boss;

113- -external threads; 114-a groove; 115- -a first stop block;

116- -a second stop block; 117- -rotation stop projection; 12- - -a circular table;

2- -screwing the cover; 21- -a second through hole; 211-bell mouth;

22- -internal threads; 23- -a flange; 24- - -a movable block;

25- -installation cavity; 3-an applicator; 31- -a communication rod;

311- -a convex ring portion; 32-a flocking sleeve; 4- -caps.

Detailed Description

In order to further explain the technical scheme of the invention, the invention is explained in detail by the specific embodiment.

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the embodiments of the present invention, it should be understood that the indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, or the orientations or positional relationships that the present invention is used to conventionally place, or the orientations or positional relationships that are conventionally understood by those skilled in the art, and are merely to simplify the description for the convenience of describing the embodiments of the present invention, and are not to indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to a number of indicated technical features. Thus, features defined as "first" and "second" may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the description of the embodiments of the present invention, it should be further noted that, unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may include, for example, a fixed connection, a detachable connection, or an integral connection; may be mechanically, electrically or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. "beneath," "under" and "beneath" a first feature includes the first feature being directly beneath and obliquely beneath the second feature, or simply indicating that the first feature is at a lesser elevation than the second feature.

The following disclosure provides many different embodiments or examples for implementing different features of the invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Moreover, the present invention may repeat reference numerals and/or reference letters in the various examples, which have been repeated for purposes of simplicity and clarity and do not in themselves dictate a relationship between the various embodiments and/or configurations discussed.

In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.

Referring to fig. 1 to 10, the present invention discloses a cosmetic container including a container body 1, a screw cap 2, an applicator 3, and a cap 4;

the container body 1 is used for containing cosmetics, and a connecting part 11 is formed at one end of the container body; the end surface of the connecting part 11 is provided with a first through hole 111 for cosmetic to flow out;

the rotary cover 2 is in rotary fit and covers the connecting part 11 to form a closed communicating cavity 10, and the rotary cover 2 is provided with a second through hole 21 communicated to the communicating cavity 10;

the applicator 3 is mounted on the screw cap 2, the first through hole 111, the communicating chamber 10 and the second through hole 21 constitute a cosmetic passage from the container body 1 to the applicator 3;

the cover cap 4 covers the end part of the container body 1 and covers the rotary cover 2 and the applicator 3;

the present invention is characterized in that the communicating chamber 10 has a protrusion 112 formed integrally with the connecting portion 11 or the cap 2, and the protrusion 112 closes or opens the cosmetic passage in accordance with the rotation of the cap 2.

Specific embodiments of the present invention are shown below.

In fact, the above-mentioned protruding portion 112 can be provided in various ways, that is, at various positions, according to whether it is integrally formed with the connecting portion 11 or integrally formed with the cap 2:

when the protrusion 112 is integrally formed with the connecting portion 11, there are two ways: a1. the protrusion 112 may be disposed at a non-central position on the end surface of the connecting portion 11 as shown in fig. 11, and the second through hole 21 is correspondingly disposed on a moving path of the protrusion 112 (i.e. a circle drawn by the protrusion 112 with the center of the connecting portion 11 as an axis when the cap 2 rotates relative to the connecting portion 11), and along with the relative rotation of the cap 2 and the connecting portion 11, the protrusion 112 is opposite to or dislocated from the second through hole 21, the second through hole 21 is closed when the protrusion is opposite to the second through hole 21, and the second through hole 21 is opened when the protrusion is dislocated; a2. the protruding portion 112 may be disposed at a central position on an end surface of the connection portion 11 as shown in fig. 4, the second through hole 21 is correspondingly disposed at the central position of the screw cap 2, the screw cap 2 and the connection portion 11 are engaged in a threaded connection manner, the circumferential surface of the connection portion 11 is provided with an external thread 113, the screw cap 2 is provided with an internal thread 22, the axial relative displacement between the screw cap 2 and the connection portion 11 occurs along with the relative rotation between the screw cap 2 and the connection portion 11 and the misalignment of the threads, and the protruding portion 112 may open or close the second through hole 21.

Similarly, when the protrusion 112 is integrally formed with the cap 2, there are two ways: b1. the protrusion 112 may be disposed at a non-central position on the end surface of the screw cap 2 as shown in fig. 12, and the first through hole 111 is correspondingly disposed on a moving path of the protrusion 112 (i.e. a circle drawn by the protrusion 112 with the center of the screw cap 2 as an axis when the screw cap 2 rotates relative to the connecting portion 11), and along with the relative rotation of the screw cap 2 and the connecting portion 11, the protrusion 112 is opposite to or dislocated from the first through hole 111, when the protrusion is opposite to the connecting portion 11, the first through hole 111 is closed, and when the protrusion is dislocated, the first through hole 111 is opened; b2. the protruding portion 112 can be disposed at a central position on an end surface of the screw cap 2 as shown in fig. 13, then the first through hole 111 is correspondingly disposed at a central position of the connecting portion 11, and the screw cap 2 and the connecting portion 11 are engaged in a threaded connection manner, the peripheral surface of the connecting portion 11 is provided with an external thread 113, the screw cap 2 is provided with an internal thread 22, along with the relative rotation between the screw cap 2 and the connecting portion 11 and the dislocation of the threads, the screw cap 2 and the connecting portion 11 generate an axial relative displacement, and the protruding portion 112 can open or close the first through hole 111.

Referring to fig. 3 and 4, the protrusion 112 is provided in the manner of a2 described above in the present embodiment. Compared with the mode that a1 and b1 are only in rotating fit in a horizontal rotating mode, a2 adopts the mode that the screw cap 2 is in threaded connection with the connecting part 11, referring to fig. 5 to 10, the second through hole 21 can be opened or closed only by rotating the screw cap 2 to enable the protruding part 112 and the second through hole 21 to generate axial relative displacement, and the screw cap 2 only needs to be slightly screwed by a small angle during operation, so that the operation is convenient and simple; moreover, when the cosmetic container is closed, only the cap 2 needs to be screwed without considering the screwing angle, and the reaction force generated between the protrusion 112 and the cap 2 after the protrusion contacts with each other can remind the user that the cosmetic container is closed, and the cosmetic container is not required to be screwed continuously, so that the cosmetic container is closed in place (b 2 is the same as above). In contrast, the modes a1 and b1 may have the problem of not being closed in place, and the tight fit between the protrusion 112 and the end face of the connecting part 11/the screw cap 2 is required to ensure the sealing performance, which also affects the operation feeling.

Further, a flared opening 211 is formed at one end of the second through hole 21 close to the protruding portion 112, and the radius of the flared opening 211 gradually increases in a direction facing the protruding portion 112, so that the end of the second through hole 21 is flared (corresponding to the shape of a circular truncated cone with a small top and a large bottom in the drawing); the end face of the projection 112 is provided with a boss 1121 matching the bell mouth 211. When the cosmetic container is in a closed state, the boss 1121 is embedded in the bell mouth 211 to achieve sealing, and the upper end of the protruding portion 112 is embedded in the end portion of the second through hole 21 in the closed state, so that the sealing effect is improved through the inclined plane type matching.

Secondly, a groove 114 is concavely formed on the end surface of the connecting part 11, the protruding part 112 is arranged at the central part of the groove 114, so that the groove 114 is annular, and the first through hole 111 is arranged at the bottom wall of the groove 114; one surface of the screw cap 2 facing the connecting part 11 is provided with a circle of flanges 23, the outer diameter of the flange 23 is equal to the inner diameter of the groove 114, the flanges 23 are movably matched with the side wall of the groove 114 along with the relative rotation of the screw cap 2 and the connecting part 11, and the communication cavity 10 is formed between the flanges 23 and the groove 114. Through setting up flange 23, flange 23 can play the effect of similar sealing ring, prevents that cosmetics from to the cooperation department seepage of spiral cover 2 with connecting portion 11, guarantees that cosmetics from first through-hole 111 flow in the intercommunication chamber 10 after, can only follow second through-hole 21 and flow out, and can not permeate spiral cover 2 and the cooperation department of connecting portion 11 and spill or take place the phenomenon of condensing.

Furthermore, refer to fig. 6 and 9 above-mentioned connecting portion 11 be provided with first stopper 115 and second stopper 116 on the global, the inner wall of spiral cover 2 is provided with movable block 24, movable block 24 is along with spiral cover 2 and connecting portion 11 relative rotation clearance fit between first stopper 115 and second stopper 116, the angle of spiral cover 2 opening and closing state has been injectd, can avoid the user to open excessively and lead to spiral cover 2 to take off from container body 1, the operation of product is felt has also been guaranteed simultaneously, the user only need screw to the end, just can switch over the opening and closing state of cosmetics container fast, and do not worry open/close excessive problem, save worry more when using cosmetics container, experience is better.

Referring to fig. 3, in some embodiments of the connecting portion 11, the first stopper 115 is higher than the second stopper 116, and the second stopper 116 with a lower height does not interfere with the rotation of the cap 2 at the initial stage of screwing the cap 2, so that the assembly is more convenient.

Referring to fig. 3, in some embodiments of the connection portion 11, the rotation stopping protrusions 117 having arc surfaces are disposed on the sides of the first and

second stoppers

115 and 116, and when the cosmetic container is in the open state/closed state, the movable block 24 is disposed between the first and

second stoppers

115 and 116 and the rotation stopping protrusions 117 to maintain the position of the movable block 24, so as to realize the anti-reverse function after the rotary cover 2 is screwed to the limit position (fully open or fully closed) with respect to the second container 1, that is, to maintain the open or closed state of the cosmetic container, and the operation of screwing the rotary cover 2 by the user can be switched only.

Finally, the number of the first through holes 111 may be one or more according to installation requirements. When the first through holes 111 are provided in plurality, it is preferable to open the first through holes 111 around the protrusion 112 at equal angular intervals, so that the cosmetics in the container body 1 can be uniformly introduced into the communicating chamber 10.

Referring to fig. 4, the end of the screw cap 2 is provided with a mounting cavity 25, and the applicator 3 is embedded in the mounting cavity 25. Through obliterator 3 and spiral cover 2 demountable installation's mode, container body 1 and spiral cover 2 are general, only need develop one set of mould, and the producer can select different types of obliterator 3 to install on spiral cover 2 according to production needs when assembling to satisfy different customers and user's demand, both made things convenient for batch production, again can effective control manufacturing cost. In this embodiment, the applicator 3 includes a hollow communicating rod 31 and a flocking sleeve 32 sleeved on one end of the communicating rod 31, and a convex ring part 311 is disposed on the circumferential surface of the other end of the communicating rod 31 to realize tight fit after the communicating rod 31 is inserted into the mounting cavity 25. In addition, the applicator 3 may be a brush, a silicone, a puff, a lip gloss, mascara, or the like.

The cover body is detachably connected with the container body 1 in a common manner, for example, tight fit, threaded connection, rotary clamping, etc., a circular truncated cone 12 for matching with an opening of the cover body can be formed on the container body 1, and the connecting portion 11 is formed on an end surface of the circular truncated cone 12.

The above container body 1 may be formed of a tube material that is flexible so as to be deformed by the pressure applied by the user, thereby facilitating the discharge of the contents stored in the container body 1, that is, cosmetics, especially gel-type cosmetics.

Through the scheme, the cosmetic passage from the container body 1 to the applicator 3 is formed by the first through hole 111, the communication cavity 10 and the second through hole 21, and the convex part 112 in the communication cavity 10 closes or opens the cosmetic passage through the rotating fit of the screw cap 2 and the connecting part 11, so that the cosmetic leakage prevention function in the container body 1 is realized, and the cosmetic container is safer and more convenient to carry; the communicating cavity 10 between the container body 1 and the screw cap 2 can be filled with a part of cosmetics after use, so that the cosmetics can be discharged more quickly when used next time, the phenomenon of discharging interruption is avoided, and the user experience is improved; the protruding part 112 and the screw cap 2 or the container body 1 are integrally formed through a die and the existing process, so that the whole parts are fewer, the structure is simpler, the assembly efficiency is higher, and the container is suitable for large-batch production.

The above embodiments and drawings are not intended to limit the form and style of the present invention, and any suitable changes or modifications thereof by those skilled in the art should be considered as not departing from the scope of the present invention.

Claims

1. A cosmetic container comprises a container body, a rotary cover, an applicator and a cover cap; the container body is used for containing cosmetics, and a connecting part is formed at one end of the container body; the end face of the connecting part is provided with a first through hole for cosmetic to flow out; the spiral cover is in rotating fit and covers the connecting part to form a closed communicating cavity, and a second through hole communicated to the communicating cavity is formed in the spiral cover; the applicator is mounted on the screw cap, and the first through hole, the communication chamber and the second through hole constitute a cosmetic passage from the container body to the applicator; the cap is arranged at the end part of the container body and covers the rotary cover and the applicator; the method is characterized in that:

the communication cavity is internally provided with a protruding part which is integrally formed with the connecting part or the screw cap, and the protruding part closes or opens the cosmetic passage along with the rotation of the screw cap.

2. A cosmetic container according to claim 1, characterized in that:

3. A cosmetic container according to claim 2, characterized in that:

one end of the second through hole, which is close to the protruding portion, is provided with a bell mouth, and the radius of the bell mouth facing the protruding portion is gradually increased; the end surface of the protruding part is provided with a boss matched with the bell mouth; when the horn mouth is in a closed state, the lug boss is embedded in the horn mouth.

4. A cosmetic container according to claim 2, wherein:

the end face of the connecting part is sunken to form a groove, the protruding part is arranged at the center of the groove, and the first through hole is arranged on the bottom wall of the groove; the screw cap faces one side of the connecting portion and is provided with a circle of flange, and the flange is movably matched with the side wall of the groove in a sealing mode along with the relative rotation of the screw cap and the connecting portion.

5. A cosmetic container according to claim 2, wherein:

the connecting portion be provided with first stopper and second stopper on global, the inner wall of spiral cover is provided with the movable block, the movable block along with the spiral cover with the relative rotation movable fit of connecting portion is in first stopper with between the second stopper.

6. A cosmetic container according to claim 5, wherein:

the height of the first limiting block is higher than that of the second limiting block.

7. A cosmetic container according to claim 5, wherein:

the side of first stopper, second stopper all is provided with the arch that splines that has the arc surface for make the spacing cooperation of movable block is in first stopper/second stopper with spline between the arch.

8. A cosmetic container according to claim 1, characterized in that:

9. The cosmetic container according to claim 8, wherein:

the applicator comprises a hollow communicating rod and a flocking sleeve arranged at one end of the communicating rod in a sleeved mode, a convex ring portion is arranged on the circumferential surface of the other end of the communicating rod, and the convex ring portion is tightly matched with the side wall of the installation cavity.

10. A cosmetic container according to any one of claims 1, 8 or 9, wherein:

the protruding part is arranged at a non-central position on the end face of the connecting part, the second through hole is correspondingly arranged on a moving path of the protruding part, and the protruding part and the second through hole are opposite or staggered along with the relative rotation of the rotary cover and the connecting part so as to close or open the second through hole.