CN214131697U - Injection device - Google Patents
Injection device Download PDFInfo
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- CN214131697U CN214131697U CN202022620687.2U CN202022620687U CN214131697U CN 214131697 U CN214131697 U CN 214131697U CN 202022620687 U CN202022620687 U CN 202022620687U CN 214131697 U CN214131697 U CN 214131697U
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- push
- pull rod
- hole
- section
- injection device
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Abstract
The utility model provides an injection device, including the injection tube, the push-and-pull rod subassembly of suit in the injection tube, the injection tube is including head end and the tail end that has the opening and set up relatively, the push-and-pull rod subassembly includes that the push-and-pull direction along the push-and-pull rod subassembly has the first push-and-pull rod that runs through the through-hole and along the buckle draw-in groove structure cooperation equipment through mutual adaptation between second push-and-pull rod and the first push-and-pull rod that runs through the through-hole setting, it is provided with first hole section to run through the through-hole near head end one side, the second push-and-pull rod includes the push-and-pull rod body and sets up in the projection that the push-and-pull rod body is close to head end one side and corresponds with first hole section position, the second push-and-pull rod is installed and is made the relative first hole section of projection remove in order to open or to seal the injection tube in running through-hole. The utility model provides a but injection apparatus complete exhaust gas realizes quick seal and unsealing simultaneously when sealed, improves whole production efficiency and practices thrift manufacturing cost, convenient and fast and easy operation simultaneously.
Description
Technical Field
The utility model relates to an injection device technical field, in particular to injection device.
Background
The push-pull rod type injection device generally comprises an injection tube, a push-pull rod and a piston, wherein the existing push-pull rod type injector mainly comprises two types, one type is that liquid can only be sucked from the tip of the injector, and the push-pull rod needs to be pushed reversely to discharge sucked air after the liquid is sucked, the injector has low liquid suction efficiency and is not beneficial to large-scale liquid suction production operation, and after liquid suction, air easily enters when a tip cover is sealed, and the piston and the push-pull rod are easy to fall off; another type of syringe that is locked and unlocked by screw threads has a function of exhausting excessive gas, but the locking and unlocking of the screw threads makes the syringe time-consuming to seal and unlock, and also affects the efficiency of mass production.
SUMMERY OF THE UTILITY MODEL
In view of the above, the present invention provides an injection device to improve the above problems.
In a first aspect, the present invention provides an injection device, including injection tube, suit in push-and-pull rod subassembly in the injection tube, the injection tube is including head end and the tail end that has opening and relative setting, the push-and-pull rod subassembly includes that the push-and-pull direction along the push-and-pull rod subassembly has the first push-and-pull rod that runs through the through-hole and follows the second push-and-pull rod that runs through the through-hole setting just first push-and-pull rod with the buckle draw-in groove structure cooperation equipment through mutual adaptation between the second push-and-pull rod, first push-and-pull rod certainly the tail end is installed extremely in the injection tube, it is close to run through the through-hole head end one side is provided with first hole section, the second push-and-pull rod include the push-and-pull rod body and set up in the push-and-pull rod body be close to head end one side and with the corresponding bulge in first hole section position, the second push-and-pull rod install extremely in the through-and make in the through-and the bulge is relative in first hole section Move to open or close the first bore section and thus open or close the syringe.
Preferably, at least two layers of buckles are arranged on one side, close to the tail end, of the push-pull rod body of the second push-pull rod along the push-pull direction, and clamping grooves are formed in positions, corresponding to the buckles, of the first push-pull rod.
More preferably, the buckle is provided with two layers, including a first buckle and a second buckle.
Preferably, a distance from the tail side of the first buckle to the elastic deformation portion of the second buckle along the push-pull direction is less than or equal to a distance from an edge of the clamping groove on the side close to the tail end to an edge of the tail portion of the first push-pull rod.
Preferably, the through hole further comprises a second hole section arranged along the push-pull direction, the second hole section is communicated with the first hole section, and the inner diameter of the first hole section is smaller than that of the second hole section; the protruding portion comprises a sealing section corresponding to the first hole section and a connecting section for connecting the sealing section and the push-pull rod body, and the sealing section moves relative to the first hole section along the push-pull direction to open or close the first hole section.
Preferably, the seal section is cylindrical and is provided with at least one first annular groove, the first annular groove is sleeved with a first seal ring matched and sealed with the inner side wall of the first hole section.
Preferably, the buckles are symmetrically arranged on two sides of the second push-pull rod.
Preferably, one side of the first push-pull rod, which is far away from the head end, is provided with a limiting part.
Preferably, the limiting portion extends from an end portion of the first push-pull rod on a side away from the head end along a direction perpendicular to the push-pull direction.
Preferably, one side of the first push-pull rod, which is close to the head end, is cylindrical and is provided with at least one second annular groove, and a second sealing ring which is matched and sealed with the inner side wall of the injection cylinder is sleeved on the second annular groove.
The technical effects of the utility model are that: the injection device can completely discharge gas during sealing and simultaneously realize quick sealing and unsealing;
the injection device has the advantages that after liquid is injected from the tail end of the injection device, the push-pull rod assembly is pushed into the injection cylinder to be limited and positioned by utilizing the semi-sealed state of the first push-pull rod and the second push-pull rod, meanwhile, gas in the injection cylinder can be completely discharged, the second push-pull rod and the first push-pull rod are sealed by utilizing the matching assembly of the first push-pull rod, the second push-pull rod, the protruding part of the second push-pull rod, the first hole section and the clamping and clamping groove structure, so that the whole injection cylinder is sealed, the liquid can be injected from the tail end, the liquid injection efficiency can be improved by utilizing the liquid injection machine for batch liquid injection, and air in the injection device can be completely discharged;
set up two push-and-pull rods and utilize buckle draw-in groove structure can realize quick sealing and unsealing, improve whole production efficiency, convenient and fast and easy operation have greatly improved production machining efficiency, have also practiced thrift manufacturing cost simultaneously greatly.
Drawings
Fig. 1 is an exploded view of an embodiment of the injection device of the present invention;
fig. 2 is a schematic structural view of an injection device according to an embodiment of the present invention in a semi-closed state;
FIG. 3 is a cross-sectional view taken along A-A of FIG. 2;
FIG. 4 is a schematic view of the semi-closed state in the other direction of FIG. 2;
FIG. 5 is a cross-sectional view taken along line B-B of FIG. 4;
FIG. 6 is a schematic view of the fully closed position with the liquid pre-filled in the orientation of FIG. 5;
fig. 7 is a diagram illustrating a first process of the push-pull rod assembly according to an embodiment of the present invention;
fig. 8 is a diagram illustrating a second process of the push-pull rod assembly according to an embodiment of the present invention.
Description of the reference numerals
| 100. |
10. |
11. Head |
12. Tail end of the |
| 111. First opening | 121. |
20. Push- |
21. First push- |
| 211. Through- |
2111. |
2112. |
212. Clamping |
| 213. Second |
214. Limiting |
22. Second push- |
221. Projecting |
| 2211. Connecting |
2212. |
22121. A first |
222. Push- |
| 223. Buckle | 2231. |
2232. |
224. Pressing |
| 30. |
40. |
50. Second seal ring |
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
The present invention provides an injection device 100, as shown in fig. 1-8, the injection device 100 comprising an injection cylinder 10, a push-pull rod assembly 20 and a closure cap 30.
As shown in fig. 1 to 6, the syringe 10 includes a head end 11 and a tail end 12 opposite to each other and having openings, the head end 11 is provided with a first opening 111, the tail end 12 is provided with a second opening 121, and the first opening 111 and the second opening 121 are communicated, the push-pull rod assembly 20 can be pushed in from the second opening 121 of the tail end 12 and can be used for assembling and sealing the first push-pull rod 21 and the second push-pull rod 22 in a matching manner, and the second push-pull rod 22 and the first push-pull rod 21 are used for assembling and sealing the tail end 12 of the syringe 10 in a matching manner, wherein the push-pull rod assembly 20 having two layers of buckles 223 needs to be half-assembled first of the first push-pull rod 21 and the second push-pull rod 22, and the half-assembled push-pull rod assembly is shown in fig. 7.
The push-pull rod assembly 20 includes a first push-pull rod 21 having a through hole 211 extending along the push-pull direction, and a second push-pull rod 22 disposed along the through hole 211, wherein the first push-pull rod 21 and the second push-pull rod 22 are assembled by means of mutually-matched snap-fit structures, and in this embodiment, the push-pull direction of the push-pull rod is along the axial direction of the syringe 10. In one embodiment, the fasteners 223 are symmetrically disposed on two sides of the second push-pull rod 22, the locking grooves 212 are disposed on the first push-pull rod 21 and correspond to the positions of the fasteners 223, the locking grooves 212 are symmetrically disposed on the middle axis of the first push-pull rod 21 along the push-pull direction and correspond to the positions of the fasteners, and the locking grooves and the fasteners are symmetrically disposed on two sides to facilitate the force for squeezing the fasteners 223 out of the locking grooves 212 when unsealing.
The first push-pull rod 21 can be installed into the syringe 10 from the second opening 121 of the rear end 12, and the through hole 211 includes a first hole section 2111 disposed near one side of the head end 11 and a second hole section 2112 disposed at one side of the first hole section 2111 away from the head end 11 along the push-pull direction, wherein the second hole section 2112 is communicated with the first hole section 2111, and the inner diameter of the first hole section 2111 is smaller than the inner diameter of the second hole section 2112.
The first push-pull rod 21 is further provided with a limiting portion 214 on the side away from the head end 11, the limiting portion 214 extends from the end portion of the first push-pull rod 21 on the side away from the head end 11 along the direction perpendicular to the push-pull direction, and the limiting portion 214 is arranged to facilitate the exertion of force when the first push-pull rod 21 is pushed and pulled and to facilitate the second push-pull rod 22 to be pushed into the first push-pull rod 21 for further sealing. One side of the first push-pull rod 21 close to the head end 11 is cylindrical and is provided with at least one second annular groove 213, the second annular groove 213 is sleeved with a second sealing ring 50 which is matched and sealed with the inner side wall of the syringe 10 so as to improve the sealing effect between the first push-pull rod 21 and the syringe 10, and preferably, the second sealing ring 50 is an annular sealing ring made of elastic materials such as silica gel or rubber.
The second push-pull rod 22 includes a push-pull rod body 222 and a protrusion 221, the protrusion 221 is disposed on a side of the push-pull rod body 222 near the head end 11 and corresponds to the first hole section 2111, the protrusion 221 includes a sealing section 2212 and a connecting section 2211, the connecting section 2211 connects the sealing section 2212 with the push-pull rod body 222, and the sealing section 2212 moves relative to the first hole section 2111 along the push-pull direction to open or close the first hole section 2111. In one embodiment, the sealing section 2212, the connecting section 2211 and the push-pull rod body 222 of the second push-pull rod 22 are integrally formed, and the protrusion 221 is cylindrical, wherein the diameter of the push-pull rod body 222 is larger than the diameter of the protrusion 221, and the length of the protrusion 221 is equal to the length of the first hole section 2111 plus the length of the second hole section 2112. The second push-pull rod 22 is installed into the through hole 211 of the first push-pull rod 21 from the side of the rear end 12 such that the protrusion 221 moves relative to the first hole section 2111 to open or close the first hole section 2111 and thus open or close the syringe 10.
The sealing section 2212 of the protruding portion 221 is provided with at least one first annular groove 22121, correspondingly, a first sealing ring 40 which is matched with the inner side wall of the first hole section 2111 for sealing is arranged on the first annular groove 22121 to improve the sealing effect between the sealing section 2212 and the first hole section 2111, the number of the first sealing rings 40 is equal to that of the first annular grooves 22121, preferably, the number of the first sealing rings 40 is two, and the first sealing rings are made of elastic materials such as silicone rubber or rubber.
The first annular groove 22121 and the second annular groove 213 are arranged so that the first sealing ring 40 and the second sealing ring 50 are not easy to fall off in the process of pushing and pulling.
The push-pull rod body 222 of the second push-pull rod 22 is provided with a buckle 223 at a side close to the tail end 12, and the first push-pull rod 21 is provided with a clamping groove 212 at a position corresponding to the buckle 223, so that the quick sealing and unsealing of the injection device 100 can be realized by utilizing the structure of the clamping groove. The second push-pull rod 22 further has a pressing portion 224 at the rear portion thereof for pressing and pushing the second push-pull rod. Preferably, the buckle 223 is made of a metal spring or a plastic buckle 223 made of PCTG material. The buckle 223 is provided with multiple layers along the push-pull direction, preferably, the buckle 223 is provided with two layers of buckles 223 of the first buckle 2231 and the second buckle 2232 along the push-pull direction, and the second buckle 2232 is a buckle near one side of the tail end 12, so that the process of the first buckle 2231 and the second buckle 2232 being clamped into the clamping groove 212 can be divided into two processes. Preferably, the relative positions of the first buckle 2231 and the second buckle 2232 are partially overlapped or non-overlapped along the cross-sectional direction of the second push-pull rod 22, and a vertical distance from a tail side of the first buckle 2231 to an elastically deformable portion of the second buckle 2232 is less than or equal to a vertical distance from an edge of the side of the locking groove 212 close to the tail end 12 to an edge of a tail portion of the first push-pull rod 21, and at this time, when the first process is finished, the external force is removed, and the first push-pull rod 21 and the second push-pull rod 22 are relatively fixed. Preferably, the first catch 2231 and the second catch 2232 are disposed opposite to each other in the push-pull direction. The two layers of buckles 223 can separate the assembly process between the first push-pull rod 21 and the second push-pull rod 22 into two parts, so that the push-pull rod assembly 20 gradually exhausts the air in the syringe 10 when being assembled with the syringe 10, thereby achieving a better exhaust sealing effect and reducing the air residue in the sealed syringe 10. In the present embodiment, as shown in fig. 5, the outer diameter of the push-pull rod body 222 is smaller than the diameter of the through-hole 211 of the first push-pull rod 21, the outer diameter of the protrusion 221 is equal to the inner diameter of the first hole segment 2111, and the inner diameter of the first hole segment 2111 is smaller than the inner diameter of the second hole segment 2112, so that at the end of the first process, the first push-pull rod 21 and the second push-pull rod 22 are not completely sealed, as shown in fig. 3. The provision of the multi-layer snap 223 and the stepwise implementation of the assembly of the push-pull rod assembly 20 facilitates, on the one hand, the positioning of the first push-pull rod 21 at the liquid level in a semi-sealed state and the provision of a venting function for the push-pull rod assembly 20 in the first step, and, on the other hand, the gradual evacuation of all the air from the injection device 100 into which the pre-filled liquid has been injected, as shown in fig. 5-6.
The cap 30 is mounted to the head end 11 of the syringe barrel 10 for sealing the head end 11 of the syringe barrel 10 to prevent the liquid in the injection device 100 from flowing out of the first opening 111 when the injection device 100 is pre-filled with the liquid from the rear end 12.
Taking the structure with two layers of latches 223 as an example, as shown in fig. 1-8, the first process of the first latch 2231 being latched into the latch groove 212 and the second process of the second latch 2232 being latched into the latch groove 212 are defined as follows:
1. pressing the pressing portion 224 of the second push-pull rod 22 to push the second push-pull rod 22 into the through hole 211 from the side of the through hole 211 close to the limiting portion 214 of the first push-pull rod 21 to the side of the first buckle 2231 clamped into the clamping groove 212, at this time, the sealing section 2212 of the protruding portion 221 is pushed to the side of the second hole section 2112 away from the side of the head end 11, the first push-pull rod 21 and the second push-pull rod 22 are in a semi-sealed state, the first push-pull rod 21 and the second push-pull rod 22 are relatively fixed, and the first process is finished, as shown in fig. 7;
2. pushing the push-pull rod assembly 20 in a semi-sealed state into the injection cylinder 10 filled with the pre-filled liquid, so that the bottom surface of the first push-pull rod 21 close to one side of the head end 11 is level with the liquid level, positioning the whole push-pull rod assembly 20 and limiting and positioning by using the first push-pull rod 21;
3. the first push-pull rod 21 is held, and the second push-pull rod 22 is further pressed, so that the second fastener 2232 is clamped into the clamping groove 212, at this time, the sealing section 2212 enters the first hole section 2111 through the second hole section 2112 and moves to the bottom of the first hole section 2111 to seal with the first hole section 2111, so as to seal the syringe 10, when the second fastener 2232 enters the clamping groove 212 and is fixed, the bottom end of the sealing section 2212 moves to the liquid level where the first push-pull rod 21 is located in advance at the end of the second process.
If the liquid needs to be pre-filled for the second time, the second snap 2232 can be pinched to exit the slot 212 to achieve unsealing.
In summary, the present invention provides an injection device 100 with venting, quick sealing and unsealing functions during sealing; the injection device can realize that after liquid is injected from the tail end 12 of the injection device 100, the push-pull rod assembly 20 in a semi-sealed state of the first push-pull rod 21 and the second push-pull rod 22 is pushed into the injection cylinder 10, gas in the injection cylinder 10 can be discharged while limiting and positioning are carried out, then the sealing section 2212 of the protruding part 221 of the first push-pull rod 21 and the second push-pull rod 22, the first hole section 2111 and the buckle clamping groove structure of the tail end 12 are matched and assembled to enable the second push-pull rod 22 and the first push-pull rod 21 to be sealed so as to seal the whole injection cylinder 10, the liquid can be injected from the tail end 12 by using the liquid injector to inject liquid in batches, so that the liquid injection efficiency is improved, air in the injection device 100 can be completely discharged, and the two push-pull rods are arranged to realize quick sealing and unsealing by using the buckle clamping groove structure, so that the overall production efficiency is improved; the injection device provided by the utility model has the advantages of convenient and rapid sealing and unsealing, simple operation, greatly improved production and processing efficiency, and greatly saved production cost; the arrangement of the two-layer or even multi-layer snap structure facilitates the positioning of the first push-pull rod 21 to the liquid level in a semi-sealed state and simultaneously facilitates the sealing of the ventilation channel in the semi-sealed state to achieve complete sealing, thereby gradually discharging all air in the injection device 100 into which the liquid is injected.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (10)
1. An injection device is characterized by comprising an injection cylinder and a push-pull rod assembly sleeved in the injection cylinder, wherein the injection cylinder comprises a head end and a tail end which are provided with openings and are arranged oppositely, the push-pull rod assembly comprises a first push-pull rod and a second push-pull rod, the first push-pull rod is provided with a through hole along the push-pull direction of the push-pull rod assembly, the second push-pull rod is arranged along the through hole, the first push-pull rod and the second push-pull rod are assembled in a matched mode through mutually-matched buckle clamping groove structures, the first push-pull rod is installed into the injection cylinder from the tail end, a first hole section is arranged on one side, close to the head end, of the through hole, the second push-pull rod comprises a push-pull rod body and a protruding portion, the protruding portion is arranged on one side, close to the head end, of the push rod body and corresponds to the position of the first hole section, the second push-pull rod is installed into the through hole of the first push rod from one side of the tail end, and the protruding portion moves relative to the first hole section to open the protruding portion Or the first hole section is closed so as to open or close the injection cylinder.
2. The injection device as defined in claim 1, wherein the second push-pull rod has at least two layers of buckles along the push-pull direction on a side of the push-pull rod body near the rear end, and the first push-pull rod has a locking groove at a position corresponding to the buckles.
3. The injection device of claim 2, wherein the catch is provided in two layers, including a first catch and a second catch.
4. The injection device as claimed in claim 3, wherein the distance from the trailing side of the first catch to the elastically deformable portion of the second catch in the push-pull direction is less than or equal to the distance from the edge of the catch on the side close to the trailing end to the trailing edge of the first push-pull rod.
5. The injection device as defined in claim 3, wherein said through bore further comprises a second bore section disposed along said push-pull direction, said second bore section being in communication with said first bore section and said first bore section having an inner diameter smaller than an inner diameter of said second bore section; the protruding portion comprises a sealing section corresponding to the first hole section and a connecting section for connecting the sealing section and the push-pull rod body, and the sealing section moves relative to the first hole section along the push-pull direction to open or close the first hole section.
6. The injection device as defined in claim 5, wherein the sealing section is cylindrical and is provided with at least one first annular groove, and a first sealing ring which is matched and sealed with the inner side wall of the first hole section is sleeved on the first annular groove.
7. An injection device according to claim 2 or 3, wherein the catches are symmetrically arranged on either side of the second push-pull rod.
8. The injection device as defined in claim 1, wherein a stopper is disposed on a side of the first push-pull rod away from the head end.
9. The injection device as defined in claim 8, wherein the stopper extends from an end of the first push-pull rod on a side away from the head end in a direction perpendicular to the push-pull direction.
10. The injection device as defined in claim 1, wherein the first push-pull rod is cylindrical on a side thereof adjacent to the head end and is provided with at least one second annular groove, and the second annular groove is provided with a second sealing ring which is matched and sealed with the inner side wall of the syringe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022620687.2U CN214131697U (en) | 2020-11-12 | 2020-11-12 | Injection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022620687.2U CN214131697U (en) | 2020-11-12 | 2020-11-12 | Injection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214131697U true CN214131697U (en) | 2021-09-07 |
Family
ID=77564265
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022620687.2U Active CN214131697U (en) | 2020-11-12 | 2020-11-12 | Injection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214131697U (en) |
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2020
- 2020-11-12 CN CN202022620687.2U patent/CN214131697U/en active Active
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