CN217185147U - Self-suction dropper bottle with piston bottle cap - Google Patents

Abstract

The utility model discloses a from inhaling formula drip bottle with piston bottle lid belongs to cosmetic packaging bottle technical field. The bottle cap comprises a bottle cap and a bottle body, wherein an external thread is arranged at a bottle opening of the bottle body, and the bottle cap comprises a cap, a piston, an outer cover, an inner cover, a spring and a dropper; the piston comprises a connecting part and a plug body part, the connecting part is connected with the bottom of the cap, a first sealing ring and a second sealing ring are respectively arranged at the outer parts of the upper end and the lower end of the plug body part, and the first sealing ring and the second sealing ring are connected with the inner wall of the inner cylinder of the inner cover in a sealing mode. Through the utility model discloses, the cooperation of the inner tube wall of piston and inner cup, behind the rotatory dustcoat, rely on spring force to promote block and piston rebound, make the automatic material body that absorbs of burette, press the block and make the material body drip out, the contra-rotation dustcoat relies on the spacing locating piece of breach, makes block and piston rebound and resets, realizes the automatic material body that absorbs, avoids the first problem that appears warping and side leakage of long-term use of current dropper silica gel head.

Description

Self-suction dropper bottle with piston bottle cap

Technical Field

The utility model relates to a from inhaling formula drip bottle with piston bottle lid belongs to cosmetics packaging bottle technical field.

Background

At present, a container for liquid cosmetics generally comprises a bottle body and a cover body in sealing fit with the bottle body, and when the container is used, the cover body needs to be opened to pour out the cosmetic liquid. For liquids such as essential oil, the amount of each time of taking is small, and the pouring is difficult and avoids waste, so a dropper bottle appears on the market and is used for solving the problem of taking a small amount of liquid.

Most of the existing dropper bottles are silica gel heads, when the dropper bottle is used, the bottle cap needs to be unscrewed, and then the silica gel head is squeezed to suck a bottle inner body, and after the dropper bottle is used for a long time, silica gel head liquid is easy to deform and generate side leakage; in addition, in the process of drawing the dropper out of the bottle body, liquid residues are easily left on the outer wall of the dropper, and the liquid residues are collected and dripped outside the bottle body, so that waste is caused.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, an object of the utility model is to provide a from inhaling formula bottle dropping bottle with piston bottle lid, can realize the automatic material body of absorbing through the inner tube wall cooperation of piston, dustcoat, spring and inner cup.

The utility model discloses the technical problem that will solve takes following technical scheme to realize:

a self-suction dropper bottle with a piston bottle cap comprises a bottle cap and a bottle body, wherein an external thread is arranged at the bottle mouth of the bottle body;

the bottle cap comprises a cap, a piston, an outer cover, an inner cover, a spring and a dropper, wherein the inner cover comprises an outer cylinder and an inner cylinder arranged in the outer cylinder;

a stroke cavity is arranged between the outer cylinder and the inner cylinder of the inner cover, the bottom of the cap is connected with a piston, and the piston is inserted into a sealing cavity in the inner cylinder;

the spring is sleeved outside the inner cylinder, the top of the spring abuts against the cap, the bottom of the spring abuts against the inner cover, and a groove is formed in the outer wall of the bottom of the inner cover;

the side wall of the cap is provided with a positioning block, the side wall of the outer cover is provided with a notch, the upper part of the notch is an inclined plane, the size of one end of the notch is smaller than that of the other end of the notch, the positioning block is positioned in the notch, the top of the outer cover is provided with an opening, the inner wall of the bottom of the outer cover is provided with a convex block, the outer cover is sleeved outside the inner cover, the convex block is clamped in the groove, the outer cover and the inner cover are rotatably connected, and when the outer cover and the inner cover rotate relatively, the cap moves up and down along the inclined plane of the notch through the positioning block, so that the piston is driven to move up and down; a limiting ring is arranged on the inner side of the top of the outer cover, a limiting ring is arranged on the outer wall of the bottom of the cap, and the top of the limiting ring tightly pushes against the limiting ring;

the piston comprises a connecting part and a plug body part, the connecting part is connected with the bottom of the cap, a first sealing ring and a second sealing ring are respectively arranged at the outer parts of the upper end and the lower end of the plug body part, and the first sealing ring and the second sealing ring are connected with the inner wall of the inner cylinder of the inner cover in a sealing mode.

As a preferable example, a filtering mechanism is further arranged between the bottle cap and the bottle body, the filtering mechanism comprises a net plug, the net plug is integrally formed by a limiting part, a sealing part and a filtering part, the limiting part is an annular piece, the diameter of the annular piece is larger than that of the bottle mouth of the bottle body, the sealing part is arranged at the bottom of the annular piece, the diameter of the sealing part is smaller than that of the bottle mouth of the bottle body, the filtering part is arranged at the bottom of the connecting part and comprises upright columns and filtering rings, the top ends of the upright columns are connected to the sealing part, the other ends of the upright columns are connected with the filtering rings, an overflow port is formed between every two upright columns, each filtering ring is provided with a filtering hole, and the diameter of each filtering hole is the same as the diameter of the section of the dropper; the sealing part and the filtering part are inserted into the bottle mouth, the limiting part is positioned above the bottle mouth, and the dropper sequentially penetrates through the filtering holes of the limiting part, the sealing part and the filtering part and is inserted into the bottle body.

As a preferable example, a gasket is further arranged between the inner cover and the mesh plug, a third sealing ring is arranged at the top of the dropper, a limiting hole is arranged in the middle of the gasket, and the diameter of the limiting hole is larger than the diameter of the cross section of the dropper and smaller than the diameter of the third sealing ring.

As a preferable example, the bottom of the bottle body is also provided with an upwards sunken positioning hole.

In a preferable embodiment, the bottom of the cap is further provided with a connecting rod, the connecting rod is provided with an external thread, the top of the piston is provided with a connecting hole, the connecting hole is provided with an internal thread, and the cap is in threaded connection with the connecting hole of the piston through the connecting rod.

As a preferable example, a circle of guide ring is arranged on the outer wall of the inner cover above the groove, the outer surface of the guide ring is an inclined plane, and an included angle between the inclined plane and the outer wall of the inner cover is an acute angle.

As a preferable example, the bottom of the inner cylinder of the inner cover is integrally connected with an insertion tube, the outer wall of the insertion tube is provided with a circle of sealing ring, the insertion tube is inserted into the top of the dropper, and the sealing ring is in sealing connection with the inner wall of the dropper.

As a preferred example, the included angle between the inclined plane and the outer wall of the inner cover ranges from 20 degrees to 45 degrees.

The utility model has the advantages that:

(1) through the utility model, the piston is matched with the inner cylinder wall of the inner cover, after the outer cover is rotated, the cap and the piston are pushed to move upwards by the spring elasticity, so that the dropper automatically absorbs the material body, the cap is pressed to drip out the material body, the outer cover is rotated reversely, the cap and the piston are moved downwards and reset by the gap limiting and positioning block, the automatic absorption of the material body is realized, and the problems of deformation and side leakage caused by long-time use of the silica gel head of the existing dropper bottle are avoided;

(2) by the utility model, the upper end and the lower end of the plug body part of the piston are respectively provided with the sealing rings, and the sealing rings are contacted with the inner wall of the inner cylinder, so that the sealing performance between the piston and the inner cylinder is ensured, the contact area between the sealing rings and the inner wall of the inner cylinder is smaller, and the friction force is reduced, so that the piston and the cap are easily jacked up by the spring;

(3) through the utility model, a filtering mechanism is arranged between the bottle cap and the bottle body, the filtering mechanism adopts the net plug, when the dropper is drawn out from the bottle body, the liquid residue on the outer wall of the dropper is filtered by the filter holes of the filtering part of the net plug and flows back into the bottle from the overflow port of the filtering part, thereby avoiding the liquid residue hanging on the outer wall of the dropper, which causes waste;

(4) by the utility model, a gasket with sealing function is arranged between the inner cover and the net plug, and the gasket is matched with the sealing ring above the dropper, so that the sealing performance of the bottle mouth of the dropper is improved;

(5) through the utility model, the bottom of the bottle body is provided with the positioning hole which is sunken upwards, so that the bottle body is matched with the positioning bulge on the production line in the production and assembly process, and the probability of the bottle body toppling in the assembly process is reduced;

(6) through the utility model, the cap is connected with the connecting hole of the piston through the connecting rod by the screw thread, so that the connection between the cap and the piston is more stable;

(7) through the utility model, the inner cup outer wall above the groove is provided with the circle of guide ring, the included angle between the guide ring inclined plane and the inner cup outer wall is an acute angle, so that the lug can be easily clamped into the groove, and the assembly between the outer cover and the inner cup is convenient;

(8) through the utility model discloses, at the inner tube bottom an organic whole of inner cup and be connected with the intubate, the intubate outer wall is equipped with the round sealing washer, and sealing washer and burette inner wall sealing connection guarantee the leakproofness at burette top simultaneously, increase the steadiness of being connected between burette and the inner cup.

Drawings

FIG. 1 is a schematic perspective view of the dropper bottle when the cap is retracted into the housing;

FIG. 2 is a perspective view of the dropper bottle with the cap extending out of the housing;

FIG. 3 is a schematic view of a dropper bottle in use;

FIG. 4 is a schematic cross-sectional view taken along line A-A of FIG. 3;

FIG. 5 is a schematic perspective view of the bottle cap completely detached from the bottle body;

FIG. 6 is a schematic diagram of an exploded structure of a dropper bottle (spring not shown);

FIG. 7 is a schematic view of the inner cap structure of the dropper bottle;

FIG. 8 is a schematic view of a cap structure of a dropper bottle;

FIG. 9 is a schematic view of the structure of the outer cover of the dropper bottle;

FIG. 10 is a schematic illustration of the piston structure of the dropper bottle;

FIG. 11 is a schematic view of a dropper structure of the dropper bottle;

FIG. 12 is a schematic diagram of a mesh plug configuration for a dropper bottle.

In the figure: 1. a bottle body; 11. a bottle mouth; 12. positioning holes; 2. a bottle cap; 21. capping; 211. a connecting rod; 212. positioning blocks; 213. a limiting ring; 22. a piston; 221. a connecting portion; 222. connecting holes; 223. a stopper portion; 224. a first seal ring; 225. a second seal ring; 23. a housing; 231. a notch; 232. an opening; 233. a bump; 234. a limiting ring; 24. an inner cover; 241. an outer cylinder; 242. an inner barrel; 243. a stroke chamber; 244. sealing the cavity; 245. inserting a tube; 246. a guide ring; 247. a groove; 25. a spring; 26. a dropper; 261. a third seal ring; 27. a gasket; 28. a net plug; 281. a limiting part; 282. a sealing part; 283. a filtering part; 284. an overflow port; 285. and (5) filtering holes.

Detailed Description

In order to make the technical means, the creation features, the achievement purposes and the functions of the present invention easy to understand, the present invention will be further described with reference to the following specific drawings and embodiments.

Example (b):

as shown in fig. 1-12, the embodiment of the present invention provides a self-priming dropper 26 with a piston 22 and a cap 2, which can achieve automatic suction of a material body by the cooperation of the piston 22, an outer cover 23, a spring 25 and the inner cylinder 242 wall of an inner cover 24.

Specifically, as shown in fig. 1 to 5, the self-priming dropper 26 bottle in this embodiment includes a bottle cap 2 and a bottle body 1, a main body of the bottle body 1 is made of PET (polyethylene terephthalate), and an external thread is provided on an outer wall of a bottle opening 11 of the bottle body 1.

As shown in fig. 4 to 12, the bottle cap 2 includes a cap 21, a piston 22, an outer cover 23, an inner cover 24, a spring 25 and a dropper 26, the inner cover 24 is integrally made of PP (high polymer polypropylene), the inner cover 24 includes an outer cylinder 241 and an inner cylinder 242 disposed in the outer cylinder 241, the lower portion of the inner cylinder 242 is integrally connected to the middle portion of the outer cylinder 241, the bottom of the outer cylinder 241 is provided with an internal thread, the bottom of the outer cylinder 241 is in threaded connection with the external thread of the bottle mouth 11 of the bottle body 1, the bottom of the inner cylinder 242 of the inner cover 24 is integrally connected to an insertion tube 245, the outer wall of the insertion tube 245 is provided with a ring of sealing ring, the insertion tube 245 is inserted into the top of the dropper 26, and the sealing ring is in sealing connection with the inner wall of the dropper 26, so as to ensure the sealing performance of the top of the dropper 26 and increase the connection stability between the dropper 26 and the inner cover 24. The dropper 26 is inserted inside the body 1, and the inner cylinder 242 forms a sealed chamber 244 for receiving the plunger 22.

A stroke chamber 243 is formed between the outer cylinder 241 and the inner cylinder 242 of the inner cover 24, the stroke chamber 243 is used as a telescopic place for the spring 25 and the cap 21, the bottom of the cap 21 is provided with a connecting rod 211, the connecting rod 211 is provided with an external thread, the top of the piston 22 is provided with a connecting hole 222, the connecting hole 222 is provided with an internal thread, the cap 21 is in threaded connection with the connecting hole 222 of the piston 22 through the connecting rod 211, and the piston 22 is inserted into a sealing chamber 244 inside the inner cylinder 242.

The spring 25 is sleeved outside the inner cylinder 242, the top of the spring 25 abuts against the cap 21, the bottom abuts against the inner cover 24, a groove 247 is formed in the outer wall of the bottom of the inner cover 24, and the length of the groove 247 occupies one fourth of the circumference of the outer wall of the inner cover 24.

The side wall of the cap 21 is provided with a positioning block 212, the side wall of the outer cover 23 is provided with a notch 231, the length of the notch 231 is consistent with that of the groove 247, the upper part of the notch 231 is an inclined plane, the size of one end of the notch 231 is smaller than that of the other end, and the positioning block 212 is positioned inside the notch 231. The whole outer cover 23 is made of ABS plastic (terpolymer of acrylonitrile, butadiene and styrene), the top of the outer cover 23 is provided with an opening 232, the inner wall of the bottom of the outer cover 23 is provided with a bump 233, the outer cover 23 is sleeved outside the inner cover 24, the bump 233 is clamped inside the groove 247, so that the outer cover 23 and the inner cover 24 are rotatably connected, and when the outer cover 23 and the inner cover 24 rotate relatively, the cover cap 21 moves up and down along the inclined plane of the notch 231 through the positioning block 212, so as to drive the piston 22 to move up and down; the inboard spacing collar 234 that is equipped with in dustcoat 23 top, be equipped with spacing ring 213 on the outer wall of block 21 bottom, spacing collar 213 top tightly spacing collar 234, spacing collar 234 and spacing ring 213 cooperation avoid block 21 to break away from dustcoat 23.

Through the utility model discloses, the inner tube 242 wall cooperation of piston 22 and inner cup 24, behind the rotatory dustcoat 23, rely on spring 25 elasticity to promote bonnet 21 and piston 22 to move upwards, make 26 automatic absorption material bodies of burette, press bonnet 21 to make the material body drip out, the contrarotation dustcoat 23, rely on breach 231 limit positioning piece 212, make bonnet 21 and piston 22 downstream and reset, realize the automatic absorption material body, avoid the problem that deformation and side leakage appear in the first long-time use of 26 bottles silica gel of current burette.

Specifically, the piston 22 includes a connecting portion 221 and a plug portion 223 disposed below the connecting portion 221, the connecting portion 221 is provided with a connecting hole 222 and is in threaded connection with the connecting rod 211 at the bottom of the cap 21, the outer portions of the upper and lower ends of the plug portion 223 are respectively provided with a first sealing ring 224 and a second sealing ring 225, and the first sealing ring 224 and the second sealing ring 225 are in sealing connection with the inner wall of the inner cylinder 242 of the inner cover 24.

Through the utility model discloses, both ends are equipped with the sealing ring respectively about the cock body portion 223 of piston 22, through the inner wall contact of sealing ring and inner tube 242, not only guarantee the leakproofness between piston 22 and the inner tube 242, and area of contact between sealing ring and the inner tube 242 inner wall is less moreover, reduces frictional force for spring 25 is easy with piston 22 and block 21 jack-up.

In addition, a filtering mechanism is further arranged between the bottle cap 2 and the bottle body 1, the filtering mechanism comprises a net plug 28, the net plug 28 is integrally made of LLDPE (linear low density polyethylene) materials, the net plug 28 is integrally formed by a limiting portion 281, a sealing portion 282 and a filtering portion 283, the limiting portion 281 is an annular sheet, the diameter of the annular sheet is larger than that of the bottle opening 11 of the bottle body 1, the sealing portion 282 is arranged at the bottom of the annular sheet, the diameter of the sealing portion 282 is smaller than that of the bottle opening 11 of the bottle body 1, the filtering portion 283 is arranged at the bottom of the sealing portion 282 and comprises upright posts and filter rings, the top ends of the upright posts are connected with the sealing portion 282, the other ends of the upright posts are connected with the filter rings, overflow ports 284 are formed between every two upright posts, the filter rings are provided with filter holes 285, and the diameter of the filter holes 285 is the same as that of the section of the dropper 26; the sealing part 282 and the filtering part 283 are inserted into the bottle mouth 11, the limiting part 281 is positioned above the bottle mouth 11, and the dropper 26 sequentially passes through the limiting part 281, the sealing part 282 and the filtering hole 285 of the filtering part 283 and is inserted into the bottle body 1. Through the utility model discloses, still be equipped with filtering mechanism between bottle lid 2 and body 1, filtering mechanism adopts net stopper 28, and when burette 26 was taken out from body 1, the liquid of burette 26 outer wall remained by the filtration of filtration 285 of net stopper 28 filtering portion 283 to in the overflow mouth 284 backward flow to the bottle of filtering portion 283, avoid burette 26 outer wall to hang and have liquid to remain, cause the waste.

Preferably, a gasket 27 is further disposed between the inner cover 24 and the mesh plug 28, the gasket 27 is made of PE (polyethylene), a third sealing ring 261 is disposed on the top of the dropper 26, a limiting hole is disposed in the middle of the gasket 27, and the diameter of the limiting hole is larger than the diameter of the cross section of the dropper 26 and smaller than the diameter of the third sealing ring 261. The gasket 27 is matched with a sealing ring above the dropper 26, so that the sealing performance of the dropper 26 at the bottle mouth 11 is improved.

Preferably, the bottom of the bottle body 1 is further provided with an upward-concave positioning hole 12. The bottom of the bottle body 1 is provided with an upward sunken positioning hole 12, so that the dropper 26 is matched with a positioning bulge on a production line in the production and assembly process, and the probability of bottle body toppling in the assembly process is reduced.

Preferably, a circle of guide ring 246 is arranged on the outer wall of the inner cover 24 above the groove 247, the outer surface of the guide ring 246 is an inclined surface, an included angle between the inclined surface and the outer wall of the inner cover 24 is an acute angle, the included angle ranges from 20 degrees to 45 degrees, and the included angle between the inclined surface and the outer wall of the inner cover 24 in the embodiment is 30 degrees. The included angle between the inclined plane of the guide ring 246 and the outer wall of the inner cover 24 is an acute angle, so that the projection 233 can be easily clamped into the groove 247, and the outer cover 23 and the inner cover 24 can be conveniently assembled.

The working principle is as follows:

as shown in fig. 1-5, the initial state of the present invention is shown in fig. 1, at this time, the cap 21 is located inside the outer cover 23, the top of the cap 21 is flush with the top of the outer cover 23, when the bottle of cosmetics in the dropper 26 needs to be used, the outer cover 23 is rotated counterclockwise, the outer cover 23 and the inner cover 24 rotate relatively, at the same time, the cap 21 and the outer cover 23 rotate relatively, the positioning block 212 on the cap 21 moves upward along the inclined plane of the notch 231 of the outer cover 23, the cap 21 is gradually jacked up, the cap 21 is interlocked with the piston 22 to move upward in the sealing cavity 244 of the inner cover 24, the dropper 26 sucks the cosmetics liquid in the bottle body 1 into the dropper 26, at this time, the spring 25 changes from the original compressed state to the extended state, the spring 25 jacks up the cap 21 and the piston 22, the outer cover 23 continues to rotate, at this time, the outer cover 23, the inner cover 24 and the cap 21 do not rotate relatively, the outer cover 23 drives the inner cover 24 to rotate with the bottle mouth 11, so that the bottle cap 2 is spirally separated from the bottle body 1, then the bottle cap 2 is pulled out upwards, and in the process that the dropper 26 is pulled out from the bottle body 1, liquid residue on the outer wall of the dropper 26 is filtered by the filter holes 285 of the filtering part 283 of the net plug 28, and flows back into the bottle body 1 from the overflow port 284 of the filtering part 283. After the dropper 26 is completely pulled out of the bottle body 1, the cap 21 is pressed, the cap 21 drives the piston 22 to move downwards, the liquid in the dropper 26 is compressed and squeezed out, the cap 21 is released, and the cap 21 is jacked up by the elastic force of the spring 25.

When the dropper 26 needs to be put back into the bottle body 1, the outer cover 23 is rotated clockwise, the outer cover 23 drives the inner cover 24 to rotate, the outer cover 23 continues to rotate clockwise after the inner cover 24 is screwed and sealed with the bottle opening 11, at the moment, the cap 21 and the outer cover 23 rotate relatively, the positioning block 212 on the cap 21 moves downwards along the inclined plane of the notch 231 of the outer cover 23, the cap 21 is gradually retracted, the cap 21 is linked with the piston 22 to move downwards in the sealing cavity 244 of the inner cover 24, redundant cosmetic liquid is squeezed back into the bottle, the cap 21 compresses the spring 25 to the original state, and at the moment, the cap 21 retracts into the outer cover 23 and returns to the initial state.

The foregoing illustrates and describes the general principles, features and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the above-described embodiments, and that various changes and modifications may be made without departing from the spirit and scope of the invention, and such changes and modifications are intended to be included within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (8)

1. The utility model provides a from inhaling formula drip bottle with piston bottle lid, includes bottle lid and body, the bottleneck department of body is equipped with external screw thread, its characterized in that:

the bottle cap comprises a cap, a piston, an outer cover, an inner cover, a spring and a dropper, wherein the inner cover comprises an outer cylinder and an inner cylinder arranged in the outer cylinder;

a stroke cavity is arranged between the outer cylinder and the inner cylinder of the inner cover, the bottom of the cap is connected with a piston, and the piston is inserted into a sealing cavity in the inner cylinder;

the spring is sleeved outside the inner cylinder, the top of the spring abuts against the cap, the bottom of the spring abuts against the inner cover, and a groove is formed in the outer wall of the bottom of the inner cover;

the side wall of the cap is provided with a positioning block, the side wall of the outer cover is provided with a notch, the upper part of the notch is an inclined plane, one end of the notch is smaller than the other end of the notch in size, the positioning block is positioned inside the notch, the top of the outer cover is provided with an opening, the inner wall of the bottom of the outer cover is provided with a lug, the outer cover is sleeved outside the inner cover, the lug is clamped inside the groove, the outer cover and the inner cover are rotatably connected, and when the outer cover and the inner cover rotate relatively, the cap moves up and down along the inclined plane of the notch through the positioning block, so that the piston is driven to move up and down; a limiting ring is arranged on the inner side of the top of the outer cover, a limiting ring is arranged on the outer wall of the bottom of the cap, and the top of the limiting ring tightly supports the limiting ring;

the piston comprises a connecting part and a plug body part, the connecting part is connected with the bottom of the cap, a first sealing ring and a second sealing ring are respectively arranged at the outer parts of the upper end and the lower end of the plug body part, and the first sealing ring and the second sealing ring are connected with the inner wall of the inner cylinder of the inner cover in a sealing mode.

2. The self-priming dropper bottle with the piston bottle cap as claimed in claim 1, wherein a filtering mechanism is further arranged between the bottle cap and the bottle body, the filtering mechanism comprises a mesh plug, the mesh plug is integrally formed by a limiting portion, a sealing portion and a filtering portion, the limiting portion is an annular sheet, the diameter of the annular sheet is larger than that of the bottle opening of the bottle body, the bottom of the annular sheet is provided with the sealing portion, the diameter of the sealing portion is smaller than that of the bottle opening of the bottle body, the bottom of the connecting portion is provided with the filtering portion, the filtering portion comprises upright posts and filter rings, the top ends of the upright posts are connected to the sealing portion, the other ends of the upright posts are connected with the filter rings, an overflow port is formed between every two upright posts, each filter ring is provided with a filter hole, and the diameter of each filter hole is the same as the diameter of the section of the dropper; the sealing part and the filtering part are inserted into the bottle mouth, the limiting part is positioned above the bottle mouth, and the dropper sequentially penetrates through the filtering holes of the limiting part, the sealing part and the filtering part and is inserted into the bottle body.

3. The self-priming dropper bottle with the piston bottle cap as claimed in claim 2, wherein a gasket is further disposed between the inner cap and the mesh plug, a third sealing ring is disposed on the top of the dropper, a limiting hole is disposed in the middle of the gasket, and the diameter of the limiting hole is larger than the diameter of the section of the dropper and smaller than the diameter of the third sealing ring.

4. The self-priming drop vial with a piston cap of claim 1, wherein the bottom of the body further comprises an upwardly recessed locating hole.

5. The self-priming dropper bottle with the piston bottle cap as claimed in claim 1, wherein a connecting rod is further provided at the bottom of the cap, the connecting rod is provided with an external thread, a connecting hole is provided at the top of the piston, the connecting hole is provided with an internal thread, and the cap is in threaded connection with the connecting hole of the piston through the connecting rod.

6. The self-priming dropper bottle with the piston bottle cap of claim 1 wherein a circle of guide ring is arranged on the outer wall of the inner cap above the groove, the outer surface of the guide ring is an inclined surface, and an included angle between the inclined surface and the outer wall of the inner cap is an acute angle.

7. The self-priming dropper bottle with the piston bottle cap as claimed in claim 1, wherein an insertion tube is integrally connected to the bottom of the inner cylinder of the inner cap, a ring of sealing ring is arranged on the outer wall of the insertion tube, the insertion tube is inserted into the top of the dropper, and the sealing ring is hermetically connected with the inner wall of the dropper.

8. The self-priming dropper bottle with a piston cap of claim 6 wherein the angle between the ramp and the outer wall of the inner cap is in the range of 20 ° to 45 °.

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