CN211536024U - Syringe and injector - Google Patents
Syringe and injector Download PDFInfo
- Publication number
- CN211536024U CN211536024U CN201921741426.7U CN201921741426U CN211536024U CN 211536024 U CN211536024 U CN 211536024U CN 201921741426 U CN201921741426 U CN 201921741426U CN 211536024 U CN211536024 U CN 211536024U
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- section
- propelling
- stopping
- syringe
- inner diameter
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Abstract
The utility model discloses a syringe and an injector, wherein, the syringe comprises a propelling section and a stopping section; the stopping section is connected to one end of the propelling section, the inner cavity of the propelling section is communicated with the inner cavity of the stopping section, and an opening communicated with the inner cavity of the stopping section is formed in the end face, away from the propelling section, of the stopping section; the inner diameter of the opening is smaller than that of the propelling section. The utility model discloses technical scheme passes through backstop section and impels the section intercommunication, and then when being equipped with piston assembly in the cylinder, piston assembly can slide in the intracavity of backstop section intracavity and impel the section. The opening of backstop section and the inner chamber intercommunication of backstop section make the piston assembly can follow the opening part installation of backstop section, and follow the propulsion section during liquid and flow out. The inner diameter of the opening of the stopping section is smaller than that of the propelling section, so that the piston assembly arranged in the needle cylinder is difficult to be separated from the needle cylinder, and the stability of the injection process is ensured.
Description
Technical Field
The utility model relates to the technical field of injectors, in particular to a needle cylinder and an injector.
Background
Conventional syringe barrels typically have a large opening formed in one end to receive the plunger assembly and a closed end formed with a small discharge orifice. To facilitate the installation of the plunger assembly, the inside diameter of the opening of the barrel through which the plunger assembly is mounted is relatively large, so that the plunger assembly can easily escape from the opening when sliding within the barrel.
The above is only for the purpose of assisting understanding of the technical solutions of the present application, and does not represent an admission that the above is prior art.
SUMMERY OF THE UTILITY MODEL
The utility model mainly aims to provide a needle cylinder and aims to solve the problem that a piston assembly is easy to be separated from an opening of the needle cylinder when sliding in the needle cylinder.
In order to achieve the purpose, the utility model provides a needle cylinder, which comprises a propelling section and a stopping section; the stopping section is connected to one end of the propelling section, the inner cavity of the propelling section is communicated with the inner cavity of the stopping section, and an opening communicated with the inner cavity of the stopping section is formed in the end face, away from the propelling section, of the stopping section; the inner diameter of the opening is smaller than the inner diameter of the propelling section.
Optionally, the inner diameter of the stop section decreases in size in a direction along the propulsion section to the stop section.
Optionally, an inner diameter dimension of an end of the stopping section near the propelling section is larger than an inner diameter dimension of the propelling section.
Optionally, a connecting surface is formed between the stopping section and the propelling section, the connecting surface is an arc surface, and the arc surface protrudes towards the direction of the opening.
Optionally, the inner diameter of the end of the stopping section close to the propelling section is equal to the inner diameter of the end of the propelling section close to the stopping section.
Optionally, the propelling section is a cylindrical section, one end of the propelling section, which is away from the stopping section, is connected with a connecting section, and an inner cavity of the propelling section is communicated with an inner cavity of the connecting section; and a liquid outlet is formed on the end surface of the connecting section deviating from the propelling section.
Optionally, the outer wall of the connecting section is formed with an external thread; and/or the outer wall of the connecting section is convexly provided with a positioning bulge.
The utility model also provides an injector, which comprises a piston component and a needle cylinder, wherein the piston component is arranged in the needle cylinder in a sliding way; the needle cylinder comprises a pushing section and a stopping section; a liquid outlet is formed at one end of the propelling section, and an inner cavity of the propelling section is communicated with the liquid outlet; the stopping section is connected to one end, away from the liquid outlet, of the propelling section, the inner cavity of the propelling section is communicated with the inner cavity of the stopping section, and an opening communicated with the inner cavity of the stopping section is formed in the end face, away from the propelling section, of the stopping section; the inner diameter of the opening is smaller than the inner diameter of the propelling section.
Optionally, the piston assembly includes a piston body and a sealing element sleeved outside the piston body, and the sealing element abuts against the inner wall of the syringe.
Optionally, the outer wall of the sealing element is provided with at least three sealing rings arranged at intervals in a protruding manner, and the sealing rings are abutted against the inner wall of the syringe.
The utility model discloses technical scheme communicates through the inner chamber of backstop section and the inner chamber of propulsion section, and when making to be equipped with piston assembly in the cylinder, piston assembly can slide in the inner chamber of backstop section inner chamber and propulsion section. The backstop section is used for backstop piston assembly to break away from out the cylinder, and in addition, the opening of backstop section and the inner chamber intercommunication of backstop section make piston assembly can follow the opening part installation of backstop section to can promote liquid outflow when propelling the section has liquid. The inner diameter of the opening of the stopping section is smaller than that of the propelling section, so that the inner wall of the opening of the stopping section is closer to the axis of the needle cylinder relative to the inner wall of the propelling section, when the piston assembly installed in the needle cylinder returns to the stopping section from the propelling section, the inner wall of the opening of the stopping section has a large supporting effect on the piston assembly, the friction force when the piston assembly slides is increased, the piston assembly is prevented from being separated from the needle cylinder easily, and the stability of the injection process is ensured.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be 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 can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic structural view of an embodiment of the syringe of the present invention;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
FIG. 3 is an enlarged view of a portion of one embodiment shown at B in FIG. 2;
FIG. 4 is an enlarged view of a portion of the alternate embodiment shown at B in FIG. 2;
FIG. 5 is an enlarged view of a portion of the alternate embodiment shown at B in FIG. 2;
FIG. 6 is a schematic structural view of an embodiment of the syringe of the present invention;
FIG. 7 is a cross-sectional view of C-C of FIG. 6;
FIG. 8 is an enlarged view of a portion of one embodiment shown at D in FIG. 7.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 100 | |
101 | Connecting |
| 110 | |
120 | |
| 121 | Opening of the |
130 | Connecting |
| 131 | |
132 | |
| 133 | |
200 | Piston |
| 210 | Piston |
220 | |
| 221 | |
101 | Connecting surface |
The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
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.
It should be noted that, if directional indications (such as upper, lower, left, right, front and rear … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
The utility model provides a syringe 100.
In an embodiment of the present invention, please refer to fig. 1, fig. 2, fig. 6 and fig. 7 in combination, the syringe 100 includes a propelling section 110 and a stopping section 120; the stopping section 120 is connected to one end of the propelling section 110, the inner cavity of the propelling section 110 is communicated with the inner cavity of the stopping section 120, and an opening 121 communicated with the inner cavity of the stopping section 120 is formed on the end surface of the stopping section 120 departing from the propelling section 110; the inner diameter dimension of the opening 121 is smaller than the inner diameter dimension of the pusher section 110.
It will be appreciated that a piston assembly 200 may be disposed within the syringe 100 to force fluid out of the syringe 100 through the propulsion section 110. The stopping section 120 is connected to one end of the pushing section 110, the inner cavity of the stopping section 120 is communicated with the inner cavity of the pushing section 110, and an opening 121 communicated with the inner cavity of the stopping section 120 is formed on the end surface of the stopping section 120 facing away from the pushing section 110, so that the piston assembly 200 can be installed from the opening 121 and the piston assembly 200 enters the inner cavity of the stopping section 120 or the inner cavity of the pushing section 110. The pushing section 110 of the syringe 100 is used to store liquid and make the piston assembly 200 slide in the section to push the liquid to flow out of the syringe 100 through the liquid outlet 131, and the inner diameter dimension D1 of the opening 121 of the stopping section 120 is smaller than the inner diameter dimension D2 of the pushing section 110, so as to avoid the part of the piston assembly 200 that is easily removed from the syringe 100 when the piston assembly 200 is disposed in the syringe 100.
Specifically, the inner diameter of the lumen of the stopping section 120 may be the same size as the inner diameter of the lumen of the propelling section 110, or may be different from the inner diameter of the lumen of the propelling section 110, as long as the inner diameter D1 of the opening 121 of the stopping section 120 is ensured to be smaller than the inner diameter D2 of the propelling section 110. The shape of the opening 121 of the stopping section 120 may be circular or square, and the like, and the shape of the opening 121 may be the same as the cross-sectional shape of the piston assembly 200 or different from the cross-sectional shape of the piston assembly 200; the inner cylinder of the propulsion segment 110 may be cylindrical, prismatic, etc., and the cross-sectional shape of the propulsion segment 110 may be the same as the cross-sectional shape of the piston assembly 200 or different from the cross-sectional shape of the piston assembly 200. It should be noted that the inner diameter D1 of the opening 121 of the stopping section 120 and the inner diameter D2 of the pushing section 110 both refer to effective opening sizes, i.e., the area occupied by the opening 121 of the stopping section 120 and the area occupied by the opening in the cross section of the pushing section 110; for example, when the opening 121 of the stopping section 120 is circular and the propelling section 110 is cylindrical, the inner diameter dimension D1 of the opening 121 of the stopping section 120 refers to the diameter dimension of the circular opening, and the inner diameter dimension D2 of the propelling section 110 refers to the inner diameter dimension of the propelling section 110; for example, when the opening 121 of the stopping section 120 is square, and the opening in the cross section of the pushing section 110 is circular or square, the effective inner diameter is larger when the area occupied by the opening 121 of the stopping section 120 is larger than the area occupied by the opening in the cross section of the pushing section 110.
The utility model discloses technical scheme is through the inner chamber of backstop section 120 and the inner chamber intercommunication of propulsion section 110, when making to be equipped with piston assembly 200 in the cylinder 100, piston assembly 200 can slide in backstop section 120 inner chamber and the inner chamber of propulsion section 110. The stopping section 120 is used to stop the piston assembly 200 from escaping from the syringe 100, and in addition, the opening 121 of the stopping section 120 is communicated with the inner cavity of the stopping section 120, so that the piston assembly 200 can be installed from the opening 121 of the stopping section 120 and can push the liquid to flow out when the propelling section 110 is filled with the liquid. By setting the inner diameter D1 of the opening 121 of the stopping section 120 to be smaller than the inner diameter D2 of the pushing section 110, that is, the inner wall of the opening 121 of the stopping section 120 is closer to the axis of the syringe 100 than the inner wall of the pushing section 110, so that when the piston assembly 200 installed in the syringe 100 returns to the stopping section 120 from the pushing section 110, the inner wall of the opening of the stopping section 120 has a larger abutting effect on the piston assembly 200 to increase the friction force when the piston assembly 200 slides, and the piston assembly 200 is prevented from easily falling out of the syringe 100, thereby ensuring the stability during injection.
Further, as shown in fig. 3, 4 or 5, the inner diameter of the stopping section 120 is gradually reduced in size in a direction from the pushing section 110 to the stopping section 120.
With this arrangement, when the piston assembly 200 is disposed in the stopper section 120 of the syringe 100 and the piston assembly 200 moves toward the opening 121 of the stopper section 120, the resistance to movement of the piston assembly 200 is increased, so that the piston assembly 200 is more difficult to be removed from the opening 121 of the stopper section 120. In addition, with such an arrangement, when the piston assembly 200 needs to be installed in the syringe 100, the piston assembly 200 can be installed more and more smoothly after passing through the opening 121 of the stopper section 120.
As shown in fig. 3 or fig. 4, based on the above-mentioned scheme that the inner diameter of the stopping section 120 is gradually reduced along the direction from the propelling section 110 to the stopping section 120, the present invention provides an embodiment: the inner diameter of the stop section 120 at the end near the propulsion section 110 is larger than the inner diameter of the propulsion section 110.
By sizing the inner diameter of the end of the stop section 120 proximate the pusher section 110 to be larger than the inner diameter of the pusher section 110, installation of the piston assembly 200 within the stop section 120 is facilitated.
Further, as shown in fig. 4, a connection surface 101 is formed between the stopping section 120 and the propelling section 110, and the connection surface 101 is an arc surface which protrudes toward the opening 121.
It can be understood that, when the inner diameter of the stopping section 120 near the end of the propelling section 110 is larger than the inner diameter of the propelling section 110, the connecting point of the stopping section 120 and the propelling section 110 has a connecting surface 101 to form a connecting step. By arranging the connecting surface 101 as an arc surface, and the convex direction of the arc surface faces the direction of the opening 121, the piston assembly 200 can smoothly transit when moving from the stopping section 120 to the pushing section 110, or when moving from the pushing section 110 to the stopping section 120, the piston assembly 200 is prevented from having large friction force on the piston assembly 200 by the inner wall of the syringe 100, so that the piston assembly 200 is seriously worn.
As shown in fig. 5, based on the above-mentioned scheme that the inner diameter of the stopping section 120 is gradually reduced along the direction from the propelling section 110 to the stopping section 120, the present invention provides an embodiment: the inner diameter of the end of the stop section 120 close to the pushing section 110 is equal to the inner diameter of the end of the pushing section 110 close to the stop section 120.
It can be understood that when the inner diameter of the end of the stopping section 120 close to the pushing section 110 is equal to the inner diameter of the end of the pushing section 110 close to the stopping section 120, the inner wall of the syringe 100 can be processed easily, and the piston assembly 200 does not have a large bumping and shaking condition when moving between the stopping section 120 and the pushing section 110.
Further, as shown in fig. 1 or fig. 6, the propelling section 110 is a cylindrical section, a connecting section 130 is further connected to one end of the propelling section 110 away from the stopping section 120, and an inner cavity of the propelling section 110 is communicated with an inner cavity of the connecting section 130; the end surface of the connecting section 130 facing away from the propulsion section 110 is formed with a liquid outlet 131.
The above arrangement enables one end of the propelling section 110 to be connected to the connecting section 130 and the other end to be connected to the stopping section 120, so that when the syringe 100 contains liquid and the piston assembly 200 is provided, the piston assembly 200 can push the liquid in the propelling section 110 to the connecting section 130 completely when the piston assembly 200 pushes the liquid in the cylindrical section 111. The connecting section 130 is used for connecting a needle, and the inner cavity of the connecting section 130 is communicated with the inner cavity of the propelling section 110, so that the liquid in the propelling section 110 is pushed by the piston assembly 200 to flow to the needle through the liquid outlet 131 of the connecting section 130, and the injection effect on the patient is realized.
Further, as shown in fig. 1 or 6, the outer wall of the connection section 130 is formed with an external thread 132.
The syringe is easily screw-coupled to other coupling tubes by forming the external thread 132 on the outer wall of the coupling section 130.
In addition, the outer wall of the connecting section 130 may be further protruded with a positioning protrusion 133. The connecting section 130 can be connected with other components through the positioning protrusion 133, for example, the component can be a plug of the syringe 100, the plug can have a positioning groove matched with the positioning protrusion, and the positioning protrusion is snapped into the positioning groove, so that the connection stability of the plug of the syringe 100 and the connecting section 130 is enhanced.
The utility model discloses still provide an injector, please combine and refer to fig. 6 to 8, this injector includes piston assembly 200 and cylinder 100, and the concrete structure of this cylinder 100 refers to above-mentioned embodiment, because this injector has adopted all technical scheme of above-mentioned all embodiments, consequently has all beneficial effects that the technical scheme of above-mentioned embodiment brought at least, and the repeated description is not repeated here one by one. Wherein the piston assembly 200 is slidably disposed within the syringe 100.
Specifically, as shown in fig. 7, the piston assembly 200 includes a piston body 210 and a sealing member 220 sleeved outside the piston body 210, wherein the sealing member 220 abuts against the inner wall of the syringe 100.
By sleeving the sealing member 220 outside the piston body 210 and abutting against the inner wall of the syringe 100, the liquid in the syringe 100 can be prevented from flowing out of the gap between the piston assembly 200 and the inner wall of the syringe 100, thereby improving the stability of the injection process.
Further, as shown in fig. 8, at least three sealing rings 221 are protruded from the outer wall of the sealing member 220, and the sealing rings 221 are pressed against the inner wall of the syringe 100.
At least three sealing rings 221 arranged at intervals are convexly arranged on the outer wall of the sealing element 220, and the sealing rings 221 are abutted against the inner wall of the needle cylinder 100, so that the sealing form between the piston assembly 200 and the inner wall of the needle cylinder 100 is approximately linear-surface sealing, and the sealing effect can be enhanced.
The above is only the optional embodiment of the present invention, and not the scope of the present invention is limited thereby, all the equivalent structure changes made by the contents of the specification and the drawings are utilized under the inventive concept of the present invention, or the direct/indirect application in other related technical fields is included in the patent protection scope of the present invention.
Claims (10)
1. A syringe, comprising:
a propulsion section; and
the stopping section is connected to one end of the propelling section, the inner cavity of the propelling section is communicated with the inner cavity of the stopping section, and an opening communicated with the inner cavity of the stopping section is formed in the end face, away from the propelling section, of the stopping section; the inner diameter of the opening is smaller than the inner diameter of the propelling section.
2. The syringe of claim 1, wherein the stopper section has an inner diameter that decreases in size in a direction along the advancing section to the stopper section.
3. The syringe of claim 2, wherein an end of the stopper section adjacent the drive section has an inner diameter dimension greater than an inner diameter dimension of the drive section.
4. The syringe of claim 3 wherein a connecting surface is formed between said stopper section and said drive section, said connecting surface being an arcuate surface that is convex in the direction of said opening.
5. The syringe of claim 2, wherein an inner diameter dimension of an end of the stopper section adjacent the pusher section is equal to an inner diameter dimension of an end of the pusher section adjacent the stopper section.
6. The needle cylinder as claimed in claim 3 or 5, wherein the propelling section is a cylindrical section, a connecting section is connected to one end of the propelling section, which is away from the stopping section, an inner cavity of the propelling section is communicated with an inner cavity of the connecting section, and a liquid outlet is formed in an end surface of the connecting section, which is away from the propelling section.
7. The syringe of claim 6 wherein the outer wall of the connecting section is formed with external threads;
and/or the outer wall of the connecting section is convexly provided with a positioning bulge.
8. An injector comprising a barrel according to any one of claims 1 to 7 and a piston assembly, the piston assembly being slidably disposed within the barrel.
9. The syringe of claim 8 wherein said piston assembly includes a piston body and a sealing member disposed about said piston body, said sealing member bearing against an inside wall of said barrel.
10. The syringe of claim 9 wherein said outer wall of said sealing member is embossed with at least three spaced apart sealing rings, said sealing rings bearing against said inner wall of said barrel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921741426.7U CN211536024U (en) | 2019-10-16 | 2019-10-16 | Syringe and injector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921741426.7U CN211536024U (en) | 2019-10-16 | 2019-10-16 | Syringe and injector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211536024U true CN211536024U (en) | 2020-09-22 |
Family
ID=72498900
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921741426.7U Active CN211536024U (en) | 2019-10-16 | 2019-10-16 | Syringe and injector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211536024U (en) |
-
2019
- 2019-10-16 CN CN201921741426.7U patent/CN211536024U/en active Active
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