CN215923103U - Bottle cap, storage bottle and liquid feeder - Google Patents

Abstract

The utility model provides a bottle cap, a storage bottle and a liquid feeder, wherein an air inlet hole is formed in the bottle cap, a buffer cavity is formed above the air inlet hole, an air inlet channel is formed in the buffer cavity, external air is communicated with the air inlet hole through the air inlet channel and the buffer cavity, and at least one buffer cavity is formed in the bottle cap.

Description

Bottle cap, storage bottle and liquid feeder

Technical Field

The utility model relates to a liquid storage device, in particular to a bottle cap, a storage bottle and a liquid feeder.

Background

In production and life, storage bottles made of materials such as plastics or metals are often required to store and transport various liquids. Usually, the bottle mouth of the storage bottle is usually provided with a bottle cap which can be opened and closed, when liquid in the storage bottle needs to be taken out, the bottle cap can be taken down and the liquid can be taken out, and after the liquid is taken out, the bottle cap can be covered on the bottle mouth of the storage bottle again, so that the liquid can be taken out.

However, the bottle cap is frequently opened and closed to make the taking of the liquid very inconvenient, for this reason, the liquid in the storage bottle is often taken out by the suction devices such as the liquid feeding machine arranged on the storage bottle in the prior art, and the frequent opening and closing of the bottle cap of the storage bottle is avoided, although this way greatly facilitates the user to take the liquid stored in the storage bottle, the following defects still exist: for suction devices such as liquid machine need pass the bottleneck side and can take out liquid in the bottle, so, then need set up the inlet port that supplies the liquid outlet hole that suction device passed and the inside and outside atmospheric pressure of balanced storage bottle on the bottle lid, nevertheless set up the inlet port after, when the storage bottle slope or inversion, the liquid in the storage bottle flows through the inlet port easily, reduces user's use and experiences.

The present application is proposed to solve the above technical problems.

SUMMERY OF THE UTILITY MODEL

The utility model designs a bottle cap, a storage bottle and a liquid feeder, and aims to solve the problems that when the storage bottle in the existing liquid feeder is inclined or inverted, liquid in the storage bottle easily flows out through an air inlet hole, and the use experience of a user is reduced.

In order to solve the problems, the utility model discloses a bottle cap, wherein an air inlet hole is formed in the bottle cap, a buffer cavity is arranged above the air inlet hole, an air inlet channel is formed in the buffer cavity, external atmosphere is communicated with the air inlet hole through the air inlet channel and the buffer cavity, and at least one buffer cavity is formed in the bottle cap.

Further, the inner top surface of the buffer cavity is higher than the air inlet channel.

Further, the buffer cavity is a continuous cavity or a plurality of cavities which are arranged discontinuously and connected in series.

Furthermore, a plurality of air inlet channels which are annularly arranged are arranged at intervals at the lower part of the buffer cavity; or the lower part of the buffer cavity is provided with at least one annular air inlet channel.

Further, the bottle cap at least comprises: the first cover and the second cover are spliced to form the buffer cavity.

Further, the second cover includes a second connection ring and a third connection ring, the second connection ring surrounds an outer side of the third connection ring; the first cover comprises an inner bottom surface and a fourth connecting ring, and the fourth connecting ring is arranged around the edge of the inner bottom surface; the outer peripheral side face of the fourth connecting ring is attached to the inner peripheral side face of the second connecting ring, the lower end face of the third connecting ring is located above the inner bottom face, and the second connecting ring, the third connecting ring, the inner bottom face and the fourth connecting ring enclose the buffer cavity.

Further, the lower end surface of the third connecting ring is suspended above the inner bottom surface to form the air inlet channel.

Furthermore, at least part of the first cover is of a deformable structure or a deformable material, and the first cover is connected with an external suction device.

Further, the bottle cap further comprises a third cap detachably connected to the outside of the second cap.

A storage bottle comprises a bottle body and the bottle cap.

A liquid feeder comprises the storage bottle.

Bottle lid, storage bottle and give liquid machine when can effectively avoiding the storage bottle slope or invert, the problem that liquid flows through the inlet port on the bottle lid, be difficult for the weeping, and have simple structure, the assembly degree of difficulty is low, the bottle lid with give and be connected stably between the aircraft nose of liquid machine, the advantage that the leakproofness is good.

Drawings

FIG. 1 is a schematic perspective view of a storage bottle according to the present invention;

FIG. 2 is a schematic top view of the storage bottle of the present invention;

FIG. 3 is a schematic cross-sectional view taken along line A-A of FIG. 2;

FIG. 4 is an enlarged partial schematic view of the finish of FIG. 3;

FIG. 5 is a schematic perspective view of the bottle of the present invention;

FIG. 6 is a schematic perspective view of the bottle of the present invention from another perspective;

FIG. 7 is a schematic perspective view of a third cover according to the present invention;

FIG. 8 is a schematic top view of the third cover according to the present invention;

FIG. 9 is a cross-sectional view of the section B-B in FIG. 8;

FIG. 10 is a schematic perspective view of a second cover according to the present invention;

FIG. 11 is a perspective view of the second cover of the present invention from another perspective;

FIG. 12 is a schematic top view of the second cover according to the present invention;

FIG. 13 is a bottom view of the second cover of the present invention;

FIG. 14 is a cross-sectional view of the cross-section C-C in FIG. 13;

FIG. 15 is a schematic perspective view of a first cover according to the present invention;

FIG. 16 is a perspective view of the first cover of the present invention from another perspective;

FIG. 17 is a schematic top view of the first cover of the present invention;

FIG. 18 is a cross-sectional view of the cross-section D-D in FIG. 17;

FIG. 19 is a side view of the first cover of the present invention;

fig. 20 is a schematic perspective view of the handpiece of the present invention.

Description of reference numerals:

1. a bottle body; 101. a bottle mouth; 102. a snap ring; 103. positioning a groove; 104. a limiting block; 2. a third cover; 201. an outer top surface; 202. an outer sidewall; 203. an inner rotating connecting piece; 204. a first connecting ring; 205. inserting the column; 3. a second cover; 301. an inner top surface; 302. an inner sidewall; 303. a clamping block; 304. a positioning bar; 305. a limiting notch; 306. a groove; 307. a second connection ring; 308. a third connecting ring; 309. an outer swivel connector; 310. an assembly hole; 4. a first cover; 401. an inner bottom surface; 402. a fourth connecting ring; 403. a liquid outlet hole; 404. an air inlet; 405. an upper connecting column; 406. a lower connecting column; 407. a buffer chamber; 407a, inner top surface; 408. an air intake passage; 5. a pipette; 6. a machine head; 61. a handpiece connecting part; 601. mounting grooves; 602. the machine head rotates the clamping piece; 603. and (4) feeding a liquid column.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

Example 1

As shown in fig. 1-20, in the bottle cap, an air inlet 404 is arranged on the bottle cap, a buffer chamber 407 is arranged above the air inlet 404, an air inlet channel 408 is arranged on the buffer chamber 407, external atmosphere is communicated with the air inlet 404 through the air inlet channel 408 and the buffer chamber 407, and at least one buffer chamber 407 is arranged on the bottle cap.

According to the liquid storage bottle, the buffer cavity 407 is arranged above the air inlet 404, and the air inlet 404 is communicated with the external atmosphere through the air inlet channel 408, so that on one hand, the air inlet 404 can achieve the effect of balancing the internal and external air pressures of the storage bottle, and the storage bottle can smoothly discharge liquid; on the other hand, when the storage bottle is inclined or inverted, for example, the storage bottle is inverted and installed on the liquid feeder, or the storage bottle is accidentally knocked over, the buffer cavity 407 can store and buffer the liquid flowing out through the air inlet 404, so that the liquid in the storage bottle is prevented from dropping on the head of the liquid feeder, the service life of the machine is shortened, and meanwhile, the liquid in the storage bottle is prevented from dropping on other articles, so that not only other articles are polluted, but also the waste of the liquid in the storage bottle is also avoided.

Further, the inner top surface 407a of the buffer chamber 407 is higher than the intake passage 408.

Further, the bottle cap comprises a plurality of buffer cavities 407, and each buffer cavity 407 is provided with an air inlet channel 408 which can be directly or indirectly communicated with the external atmosphere.

Further, when the storage bottle is upright, the air inlet channel 408 is located at the lower portion of the buffer cavity 407, so that when the storage bottle is inverted, the air inlet channel 408 will be located at the upper portion of the buffer cavity 407, so that more liquid can be buffered in the buffer cavity 407, and the air inlet channel 408 is not easily overflowed by the liquid in the buffer cavity 407, resulting in liquid flowing out.

Further, the buffer chamber 407 may be a continuous cavity or a plurality of cavities intermittently arranged and connected in series.

Preferably, the buffer chamber 407 is an annular cavity. Thus, on one hand, the accommodating space inside the buffer cavity 407 is larger, and more liquid can be buffered; on the other hand, the degree of freedom in selecting the position of the air inlet 404 is higher, and the air inlet can be arranged in any radial direction of the bottle cap.

Preferably, a plurality of air inlet channels 408 arranged in a ring shape are arranged at intervals at the lower part of the buffer cavity 407; alternatively, at least one annular air inlet channel 408 is arranged at the lower part of the buffer cavity 407.

Further, the bottle cap comprises a first cap 4 and a second cap 3, and the first cap 4 and the second cap 3 are combined to form the buffer chamber 407.

Furthermore, the bottle cap can be an integral cap or a split cap.

As some embodiments of the present application, the bottle cap is a split cap, the bottle cap comprising at least: a first cover 4 and a second cover 3, wherein the first cover 4 and the second cover 3 are combined to form the buffer chamber 407.

As some embodiments of the present application, the bottle cap is a unitary cap, and the first cap 4 and the second cap 3 are prepared by integral molding and simultaneously form the buffer chamber 407.

Further, at least part of the first cover 4 is of a deformable structure or a deformable material, and the liquid in the storage bottle is communicated with an external suction device through the first cover 4. This application is through at least partly first lid 4 sets up to deformable structure or deformable material, and passes through first lid 4 is linked together with outside suction device, in assembly and use, can allow certain assembly error through the deformation of first lid 4, makes the assembly degree of difficulty between bottle lid and the outside suction device reduces, and passes through the deformation of first lid 4 can make first lid 4 can combine better with outside suction device for the leakproofness is good between the two, difficult production weeping.

As some embodiments of the present application, a partial region of the first cover 4 is made of a flexible material.

Further, the second cover 3 comprises an inner top surface 301 and an inner side wall 302 surrounding the edge of the inner top surface 301, when the second cover 3 is covered on the bottle mouth 101 of the storage bottle, the inner top surface 301 covers the upper side of the bottle mouth 101, the inner side wall 302 surrounds the peripheral side surface of the bottle mouth 101, and the inner side wall 302 and the bottle mouth 101 are detachably connected together.

As some embodiments of the present application, as shown in fig. 10 to 12, a clamping block 303 is disposed on an inner peripheral side surface of the inner side wall 302, and correspondingly, as shown in fig. 5 to 6, a clamping ring 102 is disposed on an outer peripheral side surface of the bottle mouth 101, and the inner side wall 302 and the bottle mouth 101 are detachably clamped together through the clamping block 303 and the clamping ring 102.

Specifically, the snap ring 102 is a continuous or discontinuous annular protrusion arranged on the outer peripheral side surface of the bottle mouth 101; correspondingly, the clamping block 303 is a continuous or discontinuous annular protrusion arranged on the inner peripheral side surface of the inner side wall 302, and when the second cover 3 covers the bottle mouth 101, the clamping block 303 can be clamped on the lower side of the clamping ring 102 through elastic deformation, so that the clamping of the inner side wall 302 and the bottle mouth 101 is realized. Preferably, the snap ring 102 is a continuous annular protrusion; the clamping block 303 is a discontinuous annular protrusion, so that the inner side wall 302 can be clamped with the bottle mouth 101 conveniently.

Furthermore, a positioning strip 304 and a limiting notch 305 are arranged on the inner peripheral side surface of the inner top surface 301, correspondingly, a positioning groove 103 and a limiting block 104 are arranged on the outer peripheral side surface of the bottle mouth 101, when the second cover 3 is covered on the bottle mouth 101, the positioning strip 304 is inserted into the positioning groove 103, and the limiting block 104 is inserted into the limiting notch 305, so that the second cover 3 is positioned, and the second cover is prevented from rotating relative to the bottle body 1 of the storage bottle when being assembled with a third cover 2 or an external suction device.

Preferably, the positioning strip 304 and the limiting notch 305 are oppositely arranged at two sides of the inner top surface 301 at an angle of 180 °, and correspondingly, the positioning groove 103 and the limiting block 104 are oppositely arranged at two sides of the bottle mouth 101 at an angle of 180 °.

Further, the second cap 3 further includes a second connection ring 307, the second connection ring 307 is an annular structure disposed inside the inner side wall 302, and the second connection ring 307 is disposed coaxially with the inner side wall 302, when the second cap 3 is closed on the bottle mouth 101, the bottle mouth 101 is clamped between the inner side wall 302 and the second connection ring 307.

Preferably, when the second cap 3 is closed on the bottle mouth 101, the outer peripheral side surface of the second connecting ring 307 is attached to the inner peripheral side surface of the bottle mouth 101, and the inner peripheral side surface of the inner side wall 302 is clamped with the outer peripheral side surface of the bottle mouth 101.

Preferably, the second cap 3 is connected with the bottle mouth 101 in an interference fit manner, at this time, the width of the gap between the inner side wall 302 and the second connecting ring 307 is smaller than the wall thickness of the bottle mouth 101, and the bottle mouth 101 is inserted into the gap between the inner side wall 302 and the second connecting ring 307 in the interference fit manner, so that the stable and sealed connection between the bottle body 1 and the second cap 3 is realized.

Further, as shown in fig. 7 to 9, the third cover 2 includes an outer top surface 201 and an outer side wall 202 surrounding an edge of the outer top surface 201, the third cover 2 is detachably covered on an outer side of the second cover 3, at this time, the outer top surface 201 is located on an upper side of the inner top surface 301, and the outer side wall 202 surrounds an outer peripheral side surface of the inner side wall 302.

Further, the third cover 2 and the second cover 3 can be attached and detached to and from each other by rotation.

As some embodiments of the present application, an inner rotation connector 203 is disposed on an inner peripheral side surface of the outer sidewall 202, and correspondingly, an outer rotation connector 309 is disposed on an outer peripheral side surface of the inner sidewall 302, and the third cover 2 and the second cover 3 are rotatably fastened together by the inner rotation connector 203 and the outer rotation connector 309.

Specifically, the inner rotation connector 203 is an L-shaped protruding structure with a strip-shaped bent shape, the first end of the inner rotation connector 203 with a strip-shaped bent structure includes two protruding structures which are arranged along the inner periphery of the third cover 2 in a direction close to the horizontal direction and slightly inclined, the second end of the inner rotation connector 203 with a strip-shaped bent structure is arranged along the inner periphery of the third cover 2 in a vertical direction, and the first end and the second end are close to the vertical direction. The shape of the outer rotary connecting piece 309 is matched with the shape of the inner rotary connecting piece 203, the outer rotary connecting piece comprises a horizontal strip-shaped protruding structure arranged along the outer periphery of the inner side wall 302, and one end of the horizontal strip-shaped protruding structure forms a stopping structure through a vertical strip-shaped protruding structure. During installation, the first end of the inner rotating connecting piece 203 with the strip-shaped bending structure is screwed into the lower side of the horizontal strip-shaped protruding structure of the outer rotating connecting piece 309, so that the third cover 2 and the second cover 3 can be rotatably connected.

Further, the outer top surface 201 is provided with a first connection ring 204, correspondingly, the inner top surface 301 is provided with a mounting hole 310 and a third connection ring 308, the third connection ring 308 is arranged along the edge of the mounting hole 310, when the third cover 2 and the second cover 3 are completely assembled, the first connection ring 204 is inserted into the mounting hole 310, and the first connection ring 204 and the third connection ring 308 are attached together and connected in a sealing manner.

Preferably, the first connection ring 204 and the third connection ring 308 are hermetically connected by an interference fit.

Specifically, the third connection ring 308 is an annular structure disposed inside the inner sidewall 302, the third connection ring 308 is disposed coaxially with the inner sidewall 302, and the third connection ring 308 is disposed inside the second connection ring 307; the first connection ring 204 is an annular structure disposed inside the outer sidewall 202, the first connection ring 204 is disposed coaxially with the outer sidewall 202, and when the third cover 2 and the second cover 3 are assembled, the first connection ring 204 is disposed closely to the inside of the third connection ring 308, so as to improve the sealing performance between the third cover 2 and the second cover 3.

Further, the second cover 3 is provided with an assembly hole 310, the assembly hole 310 is a through hole, and the bottle cover is connected with an external suction device through the assembly hole 310.

Further, a plug column 205 is provided in the third cover 2, and when the third cover 2 and the second cover 3 are assembled together, the plug column 205 can be inserted into the assembly hole 310.

Further, a groove 306 is formed on the upper side surface of the inner top surface 301, the groove 306 penetrates and communicates with the edge of the inner top surface 301 and the assembly hole 310, when the second cap 3 is assembled with an external suction device, the groove 306 can form a gap between the second cap 3 and the external suction device, and the storage bottle can intake air through the groove 306 to balance the air pressure inside and outside the storage bottle.

Further, as shown in fig. 15 to 19, the first cap 4 includes an inner bottom surface 401 and a fourth connection ring 402 disposed around an edge of the inner bottom surface 401, after the assembly of the bottle cap is completed, the fourth connection ring 402 is inserted into a gap between the second connection ring 307 and the third connection ring 308, and a tortuous labyrinth structure may be formed inside the bottle cap through the fourth connection ring 402, the second connection ring 307 and the third connection ring 308, so as to further improve the sealing performance of the bottle cap. Meanwhile, the circuitous labyrinth structure in the bottle cap can slow down the speed of liquid in the storage bottle discharging through the air inlet holes 404, and the effect of preventing the liquid from flowing out when the bottle cap is toppled over is further improved.

Further, the fourth connection ring 402 and the second connection ring 307 are connected by interference fit.

Specifically, after the bottle cap is assembled, the outer peripheral side surface of the fourth connection ring 402 is attached to the inner peripheral side surface of the second connection ring 307, and a sealing structure is formed between the first cap 4 and the second cap 3.

Furthermore, a liquid outlet hole 403 is further formed in the inner bottom surface 401, and the liquid outlet hole 403 is used for discharging liquid in the bottle cap.

Furthermore, the liquid outlet hole 403 is arranged at the center of the inner bottom surface 401, an upper connecting column 405 is arranged on the upper side of the liquid outlet hole 403, a lower connecting column 406 is arranged on the lower side of the liquid outlet hole 403, through holes communicated with the liquid outlet hole 403 are formed in the upper connecting column 405 and the lower connecting column 406, after the storage bottle is assembled, the plug column 205 is inserted into the upper connecting column 405, and the first cover 4 is connected, sealed and fixed through the plug column 205 and the upper connecting column 405; the lower connection column 406 is connected to the upper end of the pipette 5 in the bottle 1, and the lower end of the pipette 5 is inserted below the liquid level in the bottle 1.

Further, at least a part of the inner bottom surface 401 is made of a flexible material.

Further, after the storage bottle is assembled, the air inlet hole 404 is located between the second connection ring 307 and the third connection ring 308, and the lower end surface of the third connection ring 308 is suspended above the inner bottom surface 401 to form the air inlet channel 408.

Specifically, the lower end surface of the third connection ring 308 is not connected or spaced from the inner bottom surface 401, so that the air inlet channel 408 is formed between the third connection ring 308 and the inner bottom surface 401, and is used for sequentially communicating the air inlet hole 404 and the buffer cavity 407 with the assembly hole 310 and the groove 306 on the second cap 3 to form an air inlet path of the bottle cap.

Furthermore, the bottle cap further comprises a third cap 2, the third cap 2 being detachably attached to the outside of the second cap 3.

Example 2

As shown in fig. 1 to 20, a storage bottle comprises a bottle body 1 and the bottle cap of embodiment 1, wherein the bottle body 1 has a bottle mouth 101; the bottle cap covers the bottle mouth 101.

Further, when the bottle cap comprises the first cap 4, the second cap 3 and the third cap 2, the first cap 4 is arranged in the bottle mouth 101, the second cap 3 covers the bottle mouth 101, and the third cap 2 is detachably connected to the outer side of the second cap 3.

This application is through first lid 4, second lid 3 and the third lid 2 that set gradually on bottleneck 101 are right bottleneck 101 has realized good sealed, make liquid in the storage bottle is difficult for leaking in storage and transportation.

In addition, this application is through inciting somebody to action third lid 2 detachably connects the outside of second lid 3 will bottle lid and outside suction device, when for liquid machine etc. assembly, can with the back is torn open to third lid 2, will the bottle lid passes through second lid 3 direct mount is on outside suction device, makes the assembly between bottle lid and the outside suction device is convenient, and the assembling process need not change the inner structure of bottle lid, also need not increase other connecting pieces yet, consequently, can not destroy the leakproofness of storage bottle self, is difficult for producing the weeping phenomenon.

Example 3

As shown in fig. 1 to 20, a liquid feeder includes the storage bottle and a head 6, the storage bottle includes a bottle body 1 and a bottle cap, and the bottle cap has the structure described in embodiment 1, which is not described herein again; the machine head 6 is provided with a machine head connecting part 61, and the machine head 6 is connected with the storage bottle through the machine head connecting part 61.

Further, the head connecting portion 61 is located on a lower end surface of the head 6, and after the assembly is completed, the head 6 is located above the storage bottle.

Further, as shown in fig. 20, the head connecting portion 61 includes mounting groove 601 and establishes feed liquor column 603 in the mounting groove 601, and after the assembly was accomplished, the second lid 3 of bottle lid with the connection can be dismantled to mounting groove 601, feed liquor column 603 inserts go up the upper end of spliced pole 405, through go up through-hole on the spliced pole 405 with it is linked together to go out liquid hole 403.

Furthermore, a head rotation clamping piece 602 is arranged on the inner peripheral side wall of the mounting groove 601, and the head rotation clamping piece 602 has the same structure as the inner rotation connecting piece 203, which is not described herein again.

During storage and transportation, the first cover 4 is blocked at the inner side of the bottle mouth 101, the second cover 3 is covered on the bottle mouth 101, the third cover 2 is arranged at the outer side of the second cover 3, and the storage bottle is well sealed through the third cover 2, the second cover 3 and the first cover 4; before use, the third cover 2 is rotationally removed, the outer rotary connecting piece 309 on the second cover 3 is rotationally clamped with the head rotary clamping piece 602 in the mounting groove 601, at this time, the liquid inlet column 603 can be communicated with the liquid outlet hole 403 through the through hole on the upper connecting column 405, and then is communicated with liquid in the storage bottle through the lower connecting column 406 and the liquid suction pipe 5, so that liquid can be sucked and output.

To sum up, this application bottle lid, storage bottle and give liquid machine have simple structure, the assembly degree of difficulty is low, and the storage bottle is connected stably with giving between the aircraft nose 6 of liquid machine, the leakproofness is good, the advantage of difficult weeping when the storage bottle inclines or inverts.

Although the present invention is disclosed above, the present invention is not limited thereto. In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the utility model as defined in the appended claims.

Claims (11)

1. The bottle cap is characterized in that an air inlet hole (404) is formed in the bottle cap, a buffer cavity (407) is formed above the air inlet hole (404), an air inlet channel (408) is formed in the buffer cavity (407), external atmosphere is communicated with the air inlet hole (404) through the air inlet channel (408) and the buffer cavity (407), and at least one buffer cavity (407) is formed in the bottle cap.

2. The bottle cap according to claim 1, wherein the inner top surface (407a) of the buffer chamber (407) is higher than the air inlet passage (408).

3. The bottle cap according to claim 1 or 2, characterized in that the buffer chamber (407) is a continuous chamber or a plurality of chambers arranged intermittently and connected in series.

4. The bottle cap according to claim 1, wherein a plurality of air inlet channels (408) are arranged at intervals on the lower portion of the buffer chamber (407); or, at least one annular air inlet channel (408) is arranged at the lower part of the buffer cavity (407).

5. The closure as claimed in claim 1, wherein the closure comprises at least: a first cover (4) and a second cover (3), wherein the first cover (4) and the second cover (3) are spliced to form the buffer cavity (407).

6. The bottle cap according to claim 5,

the second cover (3) comprises a second connecting ring (307) and a third connecting ring (308), the second connecting ring (307) surrounds the outer side of the third connecting ring (308);

the first cover (4) comprises an inner bottom surface (401) and a fourth connection ring (402), the fourth connection ring (402) is arranged around the edge of the inner bottom surface (401);

the outer peripheral side surface of the fourth connecting ring (402) is attached to the inner peripheral side surface of the second connecting ring (307), the lower end surface of the third connecting ring (308) is located above the inner bottom surface (401), and the buffer cavity (407) is defined by the second connecting ring (307), the third connecting ring (308), the inner bottom surface (401) and the fourth connecting ring (402).

7. The bottle cap according to claim 6, wherein a lower end surface of the third connection ring (308) is suspended above the inner bottom surface (401), forming the air inlet passage (408).

8. A closure according to claim 5, wherein at least part of the first cap (4) is of deformable construction or material, the first cap (4) being connected to external suction means.

9. The bottle cap according to claim 5, further comprising a third cap (2), the third cap (2) being detachably connected outside the second cap (3).

10. A storage bottle, characterized in that it comprises a body (1) and a cap according to any one of claims 1 to 9.

11. A dispenser, characterized in that it comprises a storage bottle according to claim 10.

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