CN108601399A

CN108601399A - Priming device

Info

Publication number: CN108601399A
Application number: CN201680071849.5A
Authority: CN
Inventors: 姚浩锋; 戴胜强
Original assignee: Hengxin Hongtu International Holdings Co ltd; Hongtu Dongfang Technology Shenzhen Co ltd; Shenzhen Hangsen Star Technology Co Ltd
Current assignee: Hengxin Hongtu International Holdings Co ltd; Hongtu Dongfang Technology Shenzhen Co ltd; Shenzhen Hangsen Star Technology Co Ltd
Priority date: 2016-04-26
Filing date: 2016-04-26
Publication date: 2018-09-28
Also published as: WO2017185242A1

Abstract

A kind of priming device (100), including：Bottle (10) includes for accommodating the body of liquid (102) and the mouth cylindrical part (104) at the top of body (102)；Impregnator (200), including：Shell (20) is fixed within mouth cylindrical part (104)；Piston cylinder (30), it is fixedly installed within shell (20), shoe cream room (32) is formed in piston cylinder (30), the liquid in body (102) enters shoe cream room (32) by the first check valve (40)；Piston (50), it is movably set in piston cylinder (30), oil outlet chamber (54) is formed inside piston (50), the liquid in shoe cream room (32) enters oil outlet chamber (54) by the second check valve (55)；And catheter (60), one end of catheter (60) is fixedly linked with piston (50), the other end of catheter (60) extends to shell (20) outside, and the liquid-conveying ducts (622) communicated with oil outlet chamber (54) are offered in catheter (60).Above-mentioned priming device has the advantages that sealing effect is preferable.

Description

Liquid injection device

[ technical field ] A method for producing a semiconductor device

The invention relates to a liquid injection device, in particular to a liquid injection device for injecting cigarette liquid into an electronic cigarette.

[ background of the invention ]

The electronic cigarette is also known as a virtual cigarette and an electronic atomizer. The electronic cigarette is used as a cigarette substitute. Electronic cigarettes have an appearance and taste similar to cigarettes, but generally do not contain other harmful components such as tar, aerosols, etc. in cigarettes.

The electronic cigarette contains cigarette liquid without toxic and side effects. When in use, the cigarette liquid is atomized into smoke, and the atomized smoke enables smokers to obtain a stimulation feeling of the cigarette effect. After a period of use, the tobacco juice will be exhausted, and at this time, the liquid injection device needs to be used to inject the tobacco juice into the electronic cigarette again. However, the liquid injection device sold in the market at present has poor sealing performance, and is inconvenient to use because liquid smoke is easy to drip onto hands, electronic cigarettes or other places in the liquid injection process of the electronic cigarettes. In addition, the traditional liquid injection device can leak liquid when being inverted after being opened, and can bring adverse effects to the surrounding environment.

[ summary of the invention ]

Therefore, a liquid injection device with a good sealing effect is needed.

A fluid injection apparatus comprising: the bottle body comprises a bottle body for containing liquid and a bottle mouth part positioned at the top of the bottle body; the liquid injector includes: the shell is fixedly arranged in the bottle mouth part; the piston cylinder is fixedly arranged in the shell, an oil storage cavity is formed in the piston cylinder, and liquid in the bottle body enters the oil storage cavity through a first one-way valve arranged in the piston cylinder; the piston is movably arranged in the piston cylinder, an oil outlet cavity is formed in the piston, and liquid in the oil storage cavity enters the oil outlet cavity through a second one-way valve arranged in the piston; and one end of the liquid guide pipe is fixedly connected with the piston, the other end of the liquid guide pipe extends to the outside of the shell, and a liquid guide channel communicated with the oil outlet cavity is formed in the liquid guide pipe.

In one embodiment, the liquid injection device further comprises a liquid injection needle arranged at the top of the liquid guide tube, and a liquid injection hole communicated with the liquid guide channel is formed in the liquid injection needle.

In one embodiment, the bottom of the piston cylinder is provided with an oil outlet, the first check valve comprises an elastic sealing part covering the oil outlet, and when the piston moves away from the bottle body, liquid in the bottle body passes through the oil outlet and passes through the elastic sealing part to enter the oil storage cavity; when the piston moves towards the direction close to the bottle body, the elastic sealing part blocks the oil outlet hole to prevent the liquid from returning to the bottle body from the oil storage cavity.

In one embodiment, the bottom of the piston cylinder is further provided with a positioning hole, the number of the oil outlet holes is multiple, the oil outlet holes are formed in the periphery of the positioning hole in an encircling mode, the elastic sealing portion is in a spherical crown shape, the first check valve further comprises a positioning rod connected with the middle portion of the elastic sealing portion, and the positioning rod is inserted into and fixed in the positioning hole.

In one embodiment, the liquid injection device further comprises an elastic element accommodated in the oil storage cavity, one end of the elastic element is fixed on the piston cylinder, and the other end of the elastic element abuts against the bottom of the piston cylinder.

In one embodiment, the outer wall of the piston is provided with a plurality of ribs protruding outwards, the ribs are in close contact with the inner wall of the piston cylinder, and one end of the elastic element is fixed on the ribs.

In one embodiment, an oil guide hole is formed in the bottom of the piston, the second one-way valve is a sealing ball movably arranged in the oil guide hole, and when the piston moves towards the direction close to the bottle body, liquid in the oil storage cavity passes through the oil guide hole and passes over the sealing ball to enter the oil outlet cavity; when the piston moves towards the direction close to the bottle body, the sealing ball blocks the oil guide hole to prevent the liquid from returning to the oil storage cavity from the oil outlet cavity.

In one embodiment, the liquid injection device further comprises a biasing member accommodated in the oil outlet cavity, one end of the biasing member is pressed against the sealing ball, and the other end of the biasing member is pressed against the bottom of the liquid guide pipe.

In one embodiment, the inner wall of the oil outlet cavity is provided with a plurality of arc-shaped liquid guide grooves surrounding the oil guide holes.

In one embodiment, an air inlet hole is formed in the top of the shell, a gap communicated with the air inlet hole is formed between the outer wall of the piston cylinder and the inner wall of the shell, the liquid injection device further comprises an elastic airtight piece arranged at the bottom end of the piston cylinder, and when the piston moves towards the direction close to the bottle body, outside air enters the bottle body through the air inlet hole, the gap and the elastic airtight piece in sequence; when the piston moves towards the direction close to the bottle body, the elastic air-tight piece prevents air from returning to the gap from the interior of the bottle body.

In one embodiment, the top of the piston cylinder is provided with a positioning ring used for being in contact with the inner wall of the shell, the positioning ring is provided with an air inlet groove, the outer wall of the piston cylinder close to the bottom is provided with a positioning sleeve used for being in contact with the inner wall of the shell, and the positioning sleeve is provided with an air inlet channel corresponding to the air inlet groove.

In one embodiment, an annular clamping groove is formed in the bottom end of the piston cylinder, the elastic airtight piece is sleeved in the clamping groove, the elastic airtight piece is disc-shaped, and the outer edge of the elastic airtight piece inclines towards the direction close to the bottle body.

In one embodiment, the liquid injection device further comprises a bottle cap with an opening, the shell is fixedly arranged in the bottle opening part through the bottle cap, and the liquid guide pipe is exposed through the opening.

In one embodiment, the priming device further comprises a sealing ring disposed between the piston and the catheter.

When the liquid injection device is used, certain pressure can be applied to the top end of the liquid guide pipe, so that the liquid guide pipe drives the piston to move towards the direction close to the bottle body, at the moment, the first one-way valve can prevent liquid in the oil storage cavity from entering the bottle body, meanwhile, the liquid in the oil storage cavity can enter the oil outlet cavity through the second one-way valve, and further enter the liquid cavity of the electronic cigarette through the liquid guide pipe. When the pressure on the tip of the catheter ceases, the piston will move away from the body. At this moment, the second check valve can avoid the liquid of going out the oil pocket to continue to get into the oil storage chamber, and the inside liquid of body can enter into the oil storage chamber through first check valve to accomplish once annotate the liquid circulation. Under normal state, the second one-way valve can avoid the liquid in the bottle body to flow out from the liquid guide pipe, and a good sealing effect is achieved.

The details of one or more embodiments of the invention are set forth in the accompanying drawings and the description below. Other features, objects, and advantages of the invention will be apparent from the description and drawings.

[ description of the drawings ]

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings of the embodiments can be obtained according to the drawings without creative efforts.

FIG. 1 is a front view of an injection device according to one embodiment;

FIG. 2 is a schematic cross-sectional view of the injection device shown in FIG. 1;

FIG. 3 is an enlarged view of section III of FIG. 2;

FIG. 4 is a schematic cross-sectional view of the injection device of FIG. 1 at another angle;

FIG. 5 is an enlarged view of the V portion of FIG. 4:

FIG. 6 is an exploded perspective view of the liquid injection apparatus of FIG. 1;

FIG. 7 is a perspective view of the housing of FIG. 6;

fig. 8A is a perspective view of the piston cylinder of fig. 6;

figure 8B is a perspective view of the elastomeric air seal of figure 6;

fig. 8C is a schematic perspective view of the piston cylinder of fig. 6 at different angles;

FIG. 9 is a schematic perspective view of the first check valve of FIG. 6;

FIG. 10A is a schematic cross-sectional view of the piston of FIG. 6;

FIG. 10B is a perspective view of the piston of FIG. 6;

figure 11 is a perspective view of the catheter of figure 6;

fig. 12A and 12B are schematic cross-sectional views of the injection device in different states of use.

[ detailed description ] embodiments

To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

The injection device of the present invention can be used to inject any liquid. But in the embodiments described herein are primarily used to fill the e-cigarette with liquid.

Referring to fig. 1, a liquid injection device 100 of an embodiment includes a bottle body 10, a bottle cap 12 and a liquid injector 200.

Referring to fig. 2, the bottle 10 includes a body 102 and a mouth 104 integrally formed with the body 102. The body 102 is generally tubular and is adapted to contain a liquid tobacco. The body 102 may be made of a deformable elastic material, or may be made of a plastic material, or even a metal material. The cap 12 is screwed to the mouth portion 104 to fix the injector 200 to the mouth portion 104.

Referring to fig. 2, 4 and 6, the syringe 200 includes a housing 20, a piston cylinder 30, a first one-way valve 40, a piston 50, a catheter 60, a filling needle 70 and an elastic air-tight element 80.

Referring also to fig. 7, the housing 20 includes a main body 22 and an end cap 24 positioned at the top of the main body 22. The main body 22 is substantially hollow cylindrical. The diameter of the main body 22 is slightly smaller than that of the mouth portion 104, and the diameter of the cap 24 is larger than that of the main body 22, so that the main body 22 can be accommodated in the mouth portion 104, and the cap 24 can be clamped on the top of the mouth portion 104. The end cap 24 defines a guide hole 242 at a central portion thereof for receiving the catheter 70. The end cover 24 is further symmetrically provided with a plurality of air inlet holes 244 around the guide hole 242.

Referring to fig. 8A, the piston cylinder 30 is generally a hollow cylinder open at one end and defining a reservoir chamber 32 therein for holding fluid. The diameter of the piston cylinder 30 is smaller than the diameter of the main body 22 of the housing 20, so that the piston cylinder 30 can be accommodated within the main body 22, and a gap 31 (see fig. 3 and 5) allowing gas to flow is formed between the outer wall of the piston cylinder 30 and the inner wall of the main body 22. The gap 31 communicates with the intake holes 244. The top of the piston cylinder 30 extends radially outward to form a retaining ring 34, and the bottom of the piston cylinder 30 is formed with a retaining sleeve 36 having a larger diameter. Retaining ring 34 and retaining sleeve 36 are in direct contact with the inner wall of body 22, thereby preventing piston cylinder 30 from rattling within body 22 due to differences in diameter. The edge of the positioning ring 34 begins symmetrically with a plurality of air inlet grooves 342; the periphery of the position sleeve 36 correspondingly begins with a plurality of air inlet passages 362. Each inlet slot 342 is aligned above and below one inlet passage 362. Referring to fig. 5 and 8B, the bottom end of the piston cylinder 30 is provided with an annular engaging groove 39. The elastic airtight member 80 is fitted in the engaging groove 39. The elastomeric seal 80 is generally disc-shaped and the outer edge of the elastomeric seal 80 is inclined toward the body 102. Under normal conditions, the elastomeric seal 80 is able to close the air inlet channel 362, thereby preventing outside air from entering the interior of the body 102. However, once the internal air pressure of the bottle body 102 tends to be lower than the atmospheric pressure, the elastic airtight member 80 can be elastically deformed downward, so that the external air can enter into the gap 31 through the air inlet hole 244 and the air inlet groove 342 and can enter into the inside of the bottle body 102 through the air inlet passage 362.

Referring to fig. 8C, the piston cylinder 30 has a positioning hole 37 formed in the middle of the bottom thereof and a plurality of oil outlet holes 38 surrounding the positioning hole 37.

Referring to fig. 9 and 5, the first one-way valve 40 is configured in a substantially "umbrella" shape, which may be made of an elastic material. The first check valve 40 includes a positioning rod 42 and an elastic seal portion 44 located at one end of the positioning rod 42. The positioning rod 42 is substantially tapered with a thick upper portion and a thin lower portion. The positioning rod 42 starts to have a locking groove 422 matching with the positioning hole 37 at a position near the top, so that the positioning rod 42 can be inserted into the positioning hole 37 and fixed in the positioning hole 37 by the mutual matching of the edge of the positioning hole 37 and the locking groove 422. The elastic sealing portion 44 has a spherical cap shape whose sectional diameter is gradually increased from the top to the bottom. The elastic sealing portion 44 covers above the oil outlet hole 38. In a normal state, the elastic sealing portion 44 can prevent the liquid in the oil storage chamber 32 from entering the inside of the body 102 through the oil outlet hole 38. However, when the pressure inside the body 102 is higher than the pressure in the reservoir chamber 32, the elastic sealing portion 44 can be elastically deformed and turned upward, so that the liquid inside the body 102 can enter the reservoir chamber 32 through the oil outlet hole 38.

Referring to fig. 10A, the piston 50 is substantially cylindrical. Piston 50 may slide axially up and down within piston cylinder 30 to increase or decrease the volume of reservoir chamber 32. The diameter of the piston 50 is smaller than the inner diameter of the piston cylinder 30. In order to ensure the sealing performance between the piston 50 and the piston cylinder 30, the outer wall of the piston 50 is provided with a plurality of ribs 52 which are arranged up and down and protrude outwards, and the ribs 52 are in close contact with the inner wall of the piston cylinder 30. The injector 200 further includes an elastic member 322 (see fig. 2 and 6) housed inside the reservoir chamber 32. In this embodiment, the elastic member 322 is a compression spring, one end of which abuts against the bottom surface of the piston cylinder 30, and the other end of which is fixed to the rib 52. In other embodiments, the other end of the elastic member 322 may abut against the bottom surface of the piston 50.

Referring to fig. 10B, an oil outlet chamber 54 is formed inside the piston 50 along the axial direction. The bottom of the piston 50 is also opened with an oil guide hole 56 communicating with the oil outlet chamber 54. The injector 200 also includes a second one-way valve 55 disposed within the oil outlet chamber 54. In this embodiment, the second check valve 55 is a seal ball movably disposed on the oil guide hole 56 (see fig. 3). The diameter of the cross-section of the oil outlet chamber 54 is substantially the same as the diameter of the sealing ball so that the sealing ball is always located in or directly above the oil guide hole 56. As shown in fig. 3 and 6, the injector 200 also includes a biasing member 542 that is received within the outlet chamber 54. In this embodiment, biasing member 542 is a compression spring with one end bearing against the sealing ball and the other end bearing against the bottom of the catheter 60. In a normal state, the seal ball can block the oil guide hole 56 by the elastic force of the biasing member 542, and thus the liquid exiting the oil chamber 54 can be prevented from entering the oil reservoir chamber 32 through the oil guide hole 56. However, once the pressure in the oil reservoir chamber 32 is greater than the pressure in the oil outlet chamber 54, the biasing member 542 may be compressed, thereby allowing the sealing ball to move over the oil guide hole 56 without blocking the oil guide hole 56 and allowing the liquid in the oil reservoir chamber 32 to pass through the oil guide hole 56 and into the oil outlet chamber 54. In order to make the liquid in the oil storage chamber 32 enter the oil outlet chamber 54 better, a plurality of circular arc-shaped liquid guide grooves 544 surrounding the oil guide holes 56 are formed on the inner wall of the oil outlet chamber 54 in the axial direction.

Referring to fig. 11, the catheter 60 is a generally hollow cylindrical tube including an elongated tube 62 and a plunger cover 64 at one end of the tube 62. The tube 62 extends to the outside of the housing 20 through the guide hole 242 of the housing 20. The interior of the tube 62 is axially opened with a fluid guide passage 622 (see fig. 3) communicating with the oil outlet chamber 54. The diameter of the piston cap 64 is greater than the diameter of the tube 62. The piston cover 64 is fitted over and secured to the piston 50 to collectively form the oil chamber 54 (see fig. 3). The other end of the biasing member 542 abuts against the inner wall of the step 642 of the plunger cover 64 (see fig. 3). To further enhance the seal between the piston cap 64 and the piston 50, the injector 200 further includes a sealing ring 66 disposed between the piston 50 and the piston cap 64 (see FIGS. 3 and 6). The seal ring 66 may be an O-ring. It is understood that in other embodiments, the seal ring 66 may be omitted.

Referring to fig. 2 and 6, the injection needle 70 is disposed on the top of the catheter 60 and is partially inserted into the catheter channel 622 of the tube 62. The injection needle 70 is provided with an injection hole 72 therein, which is communicated with the drainage channel 622. It is understood that in other embodiments, the injection needle 70 may be omitted.

Referring to fig. 2 to 6 again, during assembly, the elastic air-tight member 80 is firstly sleeved in the engaging groove 39 at the bottom of the piston cylinder 30, and the first check valve 40 is inserted into and fixed in the positioning hole 37 of the piston cylinder 30. Next, the resilient member 322 is placed within the reservoir 32 of the piston cylinder 30 and the piston 50 is plunged into the piston cylinder 30. After the second check valve 55 is filled in the oil outlet chamber 54 inside the piston 50, the biasing member 542 is installed so that the second check valve 55 blocks the oil guide hole 56, and then the sealing ring 66 is fitted over the piston 50 and the liquid guide tube 60 is fitted over and fixed to the piston 50. After the injection needle 70 is inserted into the drainage channel 622 of the catheter 60, the housing 20 is fixed to the outside of the piston cylinder 30 so that the tube 62 of the catheter 60 and the injection needle 70 extend to the outside of the housing 20. Finally, the case 20 is fixed to the bottle mouth portion 102 by the cap 12, thereby completing the assembly of the priming device 100.

Referring to fig. 12A, in use, when the liquid injection needle 70 is inserted into a liquid cavity (not shown) of the electronic cigarette and a certain pressure is applied to the tip of the liquid guide tube 60 to drive the piston 50 to move toward the bottle body 102, the volume of the oil storage cavity 32 inside the piston cylinder 30 is reduced, the pressure of the liquid inside is increased, and the elastic member 322 is in a compressed state. At this time, the elastic sealing portion 44 can close the oil outlet hole 38, thereby preventing the liquid in the oil storage chamber 32 from entering the inside of the bottle body 102 through the oil outlet hole 38. Since the pressure in the oil storage chamber 32 is greater than the pressure in the oil outlet chamber 54, the biasing member 542 is compressed, so that the second check valve 55 no longer blocks the oil guide hole 56, and the liquid in the oil storage chamber 32 enters the oil outlet chamber 54 through the oil guide hole 56, and further enters the inside of the electronic cigarette through the liquid guide passage 622 of the liquid guide tube 60 communicated with the oil outlet chamber 54 and the liquid injection hole 72 of the liquid injection needle 70.

Referring to FIG. 12B, when the pressure on the tip of the catheter 60 is stopped, the piston 50 will move away from the body 102 under the elastic restoring force of the elastic member 322. At this point, the volume of the reservoir chamber 32 within the piston cylinder 30 will increase and the pressure will decrease. Under the elastic restoring force of the biasing member 542, the second check valve 55 blocks the oil guide hole 56, thereby preventing the liquid exiting the oil chamber 54 from continuing through the oil guide hole 56 into the oil reservoir chamber 32. In addition, since the internal air pressure of the bottle body 102 is lower than the atmospheric pressure, the elastic air sealing member 80 will be elastically deformed downward, so that the external air can enter the gap 31 through the air inlet hole 244 and the air inlet groove 342 and can enter the inside of the bottle body 102 through the air inlet channel 362. Since the pressure in the oil storage chamber 32 is lower than the pressure in the bottle body 102, the elastic sealing portion 44 can elastically deform and turn upwards, so that the liquid in the bottle body 102 can enter the oil storage chamber 32 through the oil outlet 38, thereby completing a liquid injection cycle.

As described above, in a normal state, the second check valve 55 can block the oil guide hole 56, so as to prevent the liquid in the bottle body 102 from flowing out of the liquid guide tube 60 and the liquid injection needle 70, thereby achieving a good sealing effect. In addition, in the liquid injection process, the smoke liquid in the bottle body or the smoke liquid in the electronic cigarette is isolated from the external environment in the whole process, so that the relative safety of the liquid injection process can be ensured.

It is understood that in other embodiments, the resilient member 322 and biasing member 542 may be omitted if a pulling or pushing force is manually applied to the catheter 60. The first check valve 40 and the second check valve 55 are not limited to the embodiments described above, and any device that can make liquid flow in and out in one direction is within the scope of the disclosure.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

A priming device, comprising:

the bottle body comprises a bottle body for containing liquid and a bottle mouth part positioned at the top of the bottle body;

the liquid injector includes:

the shell is fixedly arranged in the bottle mouth part;

the piston cylinder is fixedly arranged in the shell, an oil storage cavity is formed in the piston cylinder, and liquid in the bottle body enters the oil storage cavity through a first one-way valve arranged in the piston cylinder;

the piston is movably arranged in the piston cylinder, an oil outlet cavity is formed in the piston, and liquid in the oil storage cavity enters the oil outlet cavity through a second one-way valve arranged in the piston; and

and one end of the liquid guide pipe is fixedly connected with the piston, the other end of the liquid guide pipe extends to the outside of the shell, and a liquid guide channel communicated with the oil outlet cavity is formed in the liquid guide pipe.
The liquid injection device according to claim 1, further comprising a liquid injection needle disposed at the top of the liquid guide tube, wherein a liquid injection hole communicated with the liquid guide channel is formed in the liquid injection needle.
The liquid injection device according to claim 1, wherein an oil outlet is formed in the bottom of the piston cylinder, the first check valve includes an elastic sealing portion covering the oil outlet, and when the piston moves in a direction away from the bottle body, liquid in the bottle body passes through the oil outlet and passes over the elastic sealing portion to enter the oil storage cavity; when the piston moves towards the direction close to the bottle body, the elastic sealing part blocks the oil outlet hole to prevent the liquid from returning to the bottle body from the oil storage cavity.
The liquid injection device according to claim 3, wherein a plurality of positioning holes are further formed in the bottom of the piston cylinder, the oil outlet holes are formed in the number, the oil outlet holes are formed in the periphery of the positioning holes in a surrounding mode, the elastic sealing portion is in a spherical crown shape, the first check valve further comprises a positioning rod connected with the middle portion of the elastic sealing portion, and the positioning rod is inserted into and fixed to the positioning holes.
The liquid injection device according to claim 1, further comprising an elastic member accommodated in the oil storage chamber, wherein one end of the elastic member is fixed to the piston cylinder, and the other end of the elastic member abuts against the bottom of the piston cylinder.
The injection device as claimed in claim 5, wherein the outer wall of the piston is provided with a plurality of outwardly protruding ribs, the ribs are in close contact with the inner wall of the piston cylinder, and one end of the elastic member is fixed to the ribs.
The liquid injection device according to claim 1, wherein an oil guide hole is formed at a bottom of the piston, the second check valve is a sealing ball movably disposed in the oil guide hole, and when the piston moves in a direction approaching the bottle body, liquid in the oil storage chamber passes through the oil guide hole and passes over the sealing ball to enter the oil outlet chamber; when the piston moves towards the direction close to the bottle body, the sealing ball blocks the oil guide hole to prevent the liquid from returning to the oil storage cavity from the oil outlet cavity.
The priming device of claim 7, further comprising a biasing member received within the oil outlet cavity, wherein one end of the biasing member abuts against the sealing ball and the other end abuts against the bottom of the liquid guiding tube.
The liquid injection device as claimed in claim 7, wherein the inner wall of the oil outlet cavity is provided with a plurality of circular arc-shaped liquid guide grooves surrounding the oil guide hole.
The liquid injection device according to claim 1, wherein an air inlet is formed in the top of the housing, a gap communicated with the air inlet is formed between the outer wall of the piston cylinder and the inner wall of the housing, the liquid injection device further comprises an elastic air-tight member arranged at the bottom end of the piston cylinder, and when the piston moves towards the direction close to the bottle body, external air sequentially passes through the air inlet, the gap and the elastic air-tight member and enters the interior of the bottle body; when the piston moves towards the direction close to the bottle body, the elastic air-tight piece prevents air from returning to the gap from the interior of the bottle body.
The liquid injection device according to claim 10, wherein a positioning ring for contacting with the inner wall of the housing is disposed at the top of the piston cylinder, an air inlet groove is disposed on the positioning ring, a positioning sleeve for contacting with the inner wall of the housing is disposed on the outer wall of the piston cylinder near the bottom of the piston cylinder, and an air inlet channel corresponding to the air inlet groove is disposed on the positioning sleeve.
The liquid injection device according to claim 10, wherein an annular engaging groove is formed at a bottom end of the piston cylinder, the elastic airtight member is sleeved in the engaging groove, the elastic airtight member is disc-shaped, and an outer edge of the elastic airtight member is inclined toward a direction close to the bottle body.
The priming device of claim 1, further comprising a cap having an opening, wherein the housing is fixedly disposed within the finish portion via the cap, and wherein the catheter is exposed through the opening.
The priming device of claim 1, further comprising a sealing ring disposed between the piston and the catheter.