CN211096710U - Syringe with a needle - Google Patents
Syringe with a needle Download PDFInfo
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- CN211096710U CN211096710U CN201921440995.8U CN201921440995U CN211096710U CN 211096710 U CN211096710 U CN 211096710U CN 201921440995 U CN201921440995 U CN 201921440995U CN 211096710 U CN211096710 U CN 211096710U
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- sealing ring
- piston
- syringe
- wall
- needle
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Abstract
The utility model discloses an injector, which comprises a needle cylinder, a piston and a sealing ring, wherein the piston is arranged in the needle cylinder in a sliding way; the sealing rings are clamped between the outer wall of the piston and the inner wall of the needle cylinder, at least three sealing rings are independently arranged and are distributed at intervals along the axial direction of the needle cylinder, and a chamfer angle is formed on one side, close to the inner wall of the needle cylinder, of each sealing ring. The technical scheme of the utility model is through independently being provided with at least three sealing washer and along the axis interval distribution of cylinder, then improved the sealed effect between piston and the cylinder. In addition, the sealing ring is clamped between the outer wall of the piston and the inner wall of the needle cylinder, so that the end face of the liquid piston is in direct contact with the sealing ring in the injection process, the contact area between the sealing ring and the sealing ring is reduced, the bubble amount generated when the sealing ring is in contact with liquid is further reduced, and the influence on the radiography work is reduced. And a chamfer is formed on one side of the sealing ring close to the inner wall of the needle cylinder, so that the chamfer has a guiding effect on the sliding process of the sealing ring relative to the needle cylinder in the injection process.
Description
Technical Field
The utility model relates to the technical field of medical treatment, in particular to syringe.
Background
Some high pressure radiography syringes include the syringe at present, and the tail end that is equipped with the piston in the syringe sets up a plug, realizes the sealed of syringe through this plug. However, the rubber plug is easy to fall off at the tail end, and the sealing effect is poor.
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 at providing an injector, aiming at reducing the influence of a rubber plug on the radiography work.
In order to achieve the purpose, the injector provided by the utility model comprises a needle cylinder, a piston and a sealing ring, wherein the piston is slidably arranged in the needle cylinder; the sealing ring clamp is located between the outer wall of piston and the inner wall of cylinder, the sealing ring independently be equipped with at least three and follow the axial interval distribution of cylinder, the sealing ring is close to one side of the inner wall of cylinder is formed with the chamfer.
Optionally, the piston includes a conical section and a cylindrical section connected to the conical section, and the sealing ring is sleeved outside the cylindrical section.
Optionally, a connecting surface is formed at a connecting position of the cylindrical section and the conical section, and a space is formed between the sealing ring and the connecting surface.
Optionally, the distance is L, 0.5mm & lt L & lt 10 mm.
Optionally, the thickness of the sealing ring is gradually reduced from the axis of the syringe to the inner wall of the syringe.
Optionally, a groove is formed in a side wall of the cylindrical section in a recessed manner, and the sealing ring is clamped in the groove.
Optionally, two buckling parts are convexly arranged on the end surface of the cylindrical section, which is away from the conical section, and the two buckling parts are symmetrically arranged around the center of the end surface.
Optionally, an end of the cylindrical section facing away from the conical section is formed with a plug-in groove.
Optionally, the needle cylinder comprises a cylinder body and a needle head connecting pipe connected to one end of the cylinder body, the needle head connecting pipe is communicated with the cylinder body, and the piston is arranged in the cylinder body; the outer wall of the needle head connecting pipe is provided with an external thread; and/or the outer wall of the needle head connecting pipe is convexly provided with a positioning bulge.
Optionally, the sealing ring is made of rubber or silica gel; the piston is made of acrylonitrile-butadiene-styrene copolymer or polycarbonate.
The utility model discloses technical scheme is through independently being provided with at least three sealing washer and along the axis interval distribution of cylinder, then has improved the sealed effect of sealing washer between to piston and the cylinder, avoids the liquid in the cylinder to flow from the gap between piston and the cylinder. In addition, the sealing ring is clamped between the outer wall of the piston and the inner wall of the syringe, so that liquid is in direct contact with the end face of the piston in the injection process, the contact area between the liquid and the sealing ring is reduced, the bubble amount generated when the sealing ring is in contact with the liquid is reduced, and the influence on the radiography work is reduced. And a chamfer is formed on one side of the sealing ring close to the inner wall of the needle cylinder, so that the chamfer has a guiding effect on the sliding process of the sealing ring relative to the needle cylinder in the injection process, and the phenomenon of locking between the sealing ring and the inner wall of the needle cylinder is avoided.
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 diagram of an exploded structure of an embodiment of the injector of the present invention;
fig. 2 is a front view of an embodiment of the syringe of the present invention;
FIG. 3 is a cross-sectional view A-A of FIG. 2;
FIG. 4 is an enlarged view of a portion of FIG. 3;
fig. 5 is a schematic perspective view of a piston of the syringe of the present invention.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 100 | |
110 | |
| 120 | Needle |
121 | |
| 122 | |
200 | Piston |
| 210 | |
211 | Groove |
| 212 | Fastening |
213 | Plug-in |
| 220 | |
201 | Connecting |
| 300 | |
310 | Chamfering |
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 an injector.
In the embodiment of the present invention, please refer to fig. 2 to 5 in combination, the injector includes a syringe 100, a piston 200 and a sealing ring 300, wherein the piston 200 is slidably disposed in the syringe 100; the sealing rings 300 are interposed between the outer wall of the piston 200 and the inner wall of the syringe 100, at least three sealing rings 300 are independently disposed and spaced apart from each other in the axial direction of the syringe 100, and a chamfer 310 is formed on one side of the sealing rings 300 adjacent to the inner wall of the syringe 100.
By slidably disposing the piston 200 in the syringe 100, during the injection process, when the piston 200 is pushed by external force to move, the liquid in the syringe 100 can be driven to flow into the patient through the needle connected thereto, thereby completing the injection process. By interposing the packing 300 between the outer wall of the piston 200 and the inner wall of the cylinder 100, the packing 300 provides a sealing effect between the piston 200 and the cylinder 100. Further, compared with the scheme that the sealing element is completely matched with the shape of the piston 200 and sleeved outside the piston 200, in the embodiment, at least three sealing rings 300 are independently arranged, so that on one hand, the cost can be reduced on the premise that the sealing effect can be met; on the other hand, the at least three sealing rings 300 are independently arranged and distributed along the axial direction of the syringe 100 at intervals, it can be understood that the contact area between the sealing rings 300 and the piston 200 is smaller than the area of the outer surface of the piston 200, and the end surface of the piston 200 can directly contact with liquid, so that more bubbles generated when the elastic sealing rings 300 contact with the liquid are avoided, and the influence on the radiography work is reduced. By forming the chamfer 310 on the side of the sealing ring 300 close to the inner wall of the syringe 100, the piston 200 is pushed during the injection process so that the piston 200 is slightly inclined, the situation of clamping between the sealing ring 300 and the inner wall of the syringe 100 can be avoided, and therefore a certain guiding effect is achieved, in addition, the contact area between the sealing ring 300 and the inner wall of the syringe 100 is reduced, and the resistance between the sealing ring 300 and the syringe 100 is reduced.
In order to have a good sealing effect, the material of the sealing ring 300 is softer than that of the piston 200. Specifically, the sealing ring 300 may be made of rubber or silica gel, where the rubber and the silica gel are conventional materials, and the sealing ring 300 may also be made of other elastomers; the piston 200 may be made of Acrylonitrile Butadiene Styrene (ABS) or Polycarbonate (PC), where ABS and PC are also known materials, although the piston 200 may be made of other engineering plastics.
Further, specifically, the seal ring 300 may have three, four, or more. The spacing between each two adjacent seal rings 300 may be the same or different. It will be appreciated that, in order to ensure a better sealing effect, the sealing ring 300 is interference-fitted with the syringe 100 in the present embodiment.
The utility model discloses technical scheme is through being provided with sealing washer 300 independently at least three and along the axis interval distribution of cylinder 100, then has improved sealing washer 300 and to the sealed effect between piston 200 and the cylinder 100, avoids the liquid in the cylinder 100 to flow from the gap between piston 200 and the cylinder 100. In addition, the sealing ring 300 is clamped between the outer wall of the piston 200 and the inner wall of the syringe 100, so that during the injection process, the liquid directly contacts with the end face of the piston 200, the contact area between the liquid and the sealing ring 300 is reduced, the amount of bubbles generated when the sealing ring 300 contacts with the liquid is reduced, and the influence on the radiography work is reduced. Further, a chamfer 310 is formed on one side of the sealing ring 300 close to the inner wall of the syringe 100, so that during the injection process, the chamfer 310 has a guiding effect on the sliding process of the sealing ring 300 relative to the syringe 100, and the phenomenon of jamming between the sealing ring 300 and the inner wall of the syringe 100 is avoided.
Further, referring to fig. 3 and 5, the piston 200 includes a conical section 220 and a cylindrical section 210 connected to the conical section 220, and the sealing ring 300 is sleeved outside the cylindrical section 210.
By providing a conical section 220, the conical surface that comes into contact with the liquid first during injection is less resistive to the liquid than a flat surface, thereby facilitating injection. In addition, the sealing ring 300 is sleeved outside the cylindrical section 210, so that the liquid in the syringe is difficult to contact with the sealing ring 300 too much, thereby reducing the bubble phenomenon caused by the contact of the liquid and the sealing ring 300, and further facilitating the contrast work of doctors.
Further, referring to fig. 3 and fig. 5, a connection surface 201 is formed at a connection position of the cylindrical section 210 and the tapered section 220, and a space is formed between the sealing ring 300 and the connection surface 201.
By arranging the space between the sealing ring 300 and the connecting surface 201, in the injection process, the connecting part between the conical section 220 and the cylindrical section 210 can bear a part of injection resistance, so that the sealing ring 300 is stably clamped between the piston 200 and the syringe 100, and the sealing ring 300 is ensured to have good sealing performance.
Further, as shown in FIG. 4, the pitch is defined as L, 0.5mm < L < 10mm, for example, the pitch L may be 0.5mm, 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, 5mm, 5.5mm, 6mm, 6.5mm, 7mm, 7.5mm, 8mm, 8.5mm, 9mm, 9.5mm, or 10mm, etc. it is understood that when L < 0.5mm, the pitch is too small, it is difficult to cause the junction between the tapered section 220 and the cylindrical section 210 to bear more injection resistance, and when L > 10mm, the pitch is too large, it is difficult to secure a sufficient setting space when there are at least three seal rings 300.
Further, in the present embodiment, the thickness of the sealing ring 300 is gradually reduced from the axis of the syringe 100 to the inner wall of the syringe 100.
Through the arrangement, the area of one side of the sealing ring 300 abutted to the needle cylinder 100 is smaller, so that on one hand, the contact between the sealing ring 300 and the needle cylinder 100 is closer to line-surface contact, and the sealing effect of the sealing ring 300 is improved; on the other hand, the frictional resistance between itself and the cylinder 100 during the injection process can be reduced, thereby facilitating the injection work. Specifically, the cross-sectional shape of the seal ring 300 may be trapezoidal or triangular.
Of course, in other embodiments, the shape of the sealing ring 300 may also be rectangular or other shapes, and the present invention is not limited to the above shapes.
Further, referring to fig. 3 and fig. 5, a groove 211 is formed in the sidewall of the cylindrical section 210, and the sealing ring 300 is clamped in the groove 211. This arrangement enables the seal ring 300 to be more stably attached to the piston 200. Specifically, the shape of the groove 211 may not be limited, and may be, for example, a circular ring shape or a rectangular shape.
Of course, in other embodiments, the positioning column may also be protruded from the sidewall of the cylindrical section 210, and the inner wall of the sealing ring 300 is provided with a slot into which the positioning column is inserted.
In this embodiment, as shown in fig. 5, two fastening portions 212 are convexly disposed on an end surface of the cylindrical section 210 away from the tapered section 220, and the two fastening portions 212 are symmetrically disposed about a center of the end surface.
Through the above arrangement, it is convenient for the push rod to be connected with the piston 200, specifically, the push rod has a matching portion in snap connection with the buckling portion 212, so that after the matching portion is in snap connection with the buckling portion 212, a doctor can push the piston 200 to slide in the syringe 100 by means of the push rod, and then the injection process is completed.
Of course, in other embodiments, there may be 3, 4 or more snap-in portions 212, and a plurality of snap-in portions 212 may be uniformly distributed in a ring shape, and the center of the ring shape may coincide with the center of the end surface of the cylindrical section 210 facing away from the conical section 220.
Further, as shown in fig. 5, an end of the cylindrical section 210 facing away from the conical section 220 is formed with a plug-in groove 213.
It can be understood that a part of the push rod can be inserted into the insertion groove 213, so that a pre-positioning effect of the push rod and the piston 200 can be achieved by inserting the part of the push rod into the insertion groove 213 before the push rod is connected with the piston 200, thereby facilitating subsequent connection of the push rod and the piston 200. Specifically, the insertion groove 213 may extend along the length direction of the cylindrical section 210 and may be located at the center of the cylindrical section 210.
Further, as shown in fig. 1, the syringe 100 includes a barrel 110 and a needle connecting tube 120 connected to one end of the barrel 110, the needle connecting tube 120 is communicated with the barrel 110, and the piston 200 is disposed in the barrel 110; the outer wall of the needle coupling tube 120 is formed with external threads 121.
The needle connecting tube 120 is used for connecting a needle, and is communicated with the cylinder 110 through the needle connecting tube 120, so that the liquid in the cylinder 110 is pushed by the piston 200 and flows to the needle through the needle connecting tube 120, and then the injection effect on the patient is realized. The outer wall of the needle coupling tube 120 is formed with external threads 121 to facilitate the threaded connection of the syringe with other coupling tubes.
In another embodiment, the outer wall of the needle connecting tube 120 may be further protruded with a positioning protrusion 122. Needle attachment tube 120 may be connected to other components through positioning protrusion 122, for example, the component may be a stopper of barrel 100, which may have a positioning groove matching with the positioning protrusion, and the positioning protrusion is snapped into the positioning groove, thereby enhancing the connection stability of the stopper of barrel 100 and needle attachment tube 120.
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 needle cylinder;
the piston is slidably arranged in the needle cylinder; and
the sealing ring is clamped between the outer wall of the piston and the inner wall of the needle cylinder, at least three sealing rings are independently arranged and are distributed along the axial direction of the needle cylinder at intervals, and a chamfer is formed on one side, close to the inner wall of the needle cylinder, of each sealing ring.
2. The syringe of claim 1 wherein said plunger includes a conical section and a cylindrical section connecting said conical section, said sealing ring being disposed about said cylindrical section.
3. The syringe of claim 2 wherein the junction of said cylindrical section and said conical section defines a junction surface, said sealing ring being spaced from said junction surface.
4. The syringe of claim 3 wherein the spacing is L, 0.5mm ≦ L ≦ 10 mm.
5. The syringe of claim 2 wherein said sealing ring has a thickness that decreases in size from the axis of said cylindrical section to the inside wall of said barrel.
6. The syringe of claim 2 wherein the sidewall of the cylindrical section is recessed to form a groove and the sealing ring is snapped into the groove.
7. The injector according to any one of claims 2 to 6, characterized in that the end surface of the cylindrical section facing away from the conical section is convexly provided with two snap-in parts, which are symmetrically arranged with respect to the center of the end surface.
8. The syringe of claim 7 wherein an end of the cylindrical section facing away from the conical section is formed with a mating groove.
9. The syringe according to any one of claims 1 to 6, wherein the cylinder comprises a cylinder body and a needle connecting tube connected to one end of the cylinder body, the needle connecting tube is communicated with the cylinder body, and the piston is arranged in the cylinder body; the outer wall of the needle head connecting pipe is provided with an external thread;
and/or the outer wall of the needle head connecting pipe is convexly provided with a positioning bulge.
10. The syringe according to any one of claims 1 to 6, wherein the sealing ring is made of rubber or silica gel; the piston is made of acrylonitrile-butadiene-styrene copolymer or polycarbonate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921440995.8U CN211096710U (en) | 2019-08-30 | 2019-08-30 | Syringe with a needle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921440995.8U CN211096710U (en) | 2019-08-30 | 2019-08-30 | Syringe with a needle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211096710U true CN211096710U (en) | 2020-07-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921440995.8U Active CN211096710U (en) | 2019-08-30 | 2019-08-30 | Syringe with a needle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211096710U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110448766A (en) * | 2019-08-30 | 2019-11-15 | 深圳安特医疗股份有限公司 | Syringe |
-
2019
- 2019-08-30 CN CN201921440995.8U patent/CN211096710U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110448766A (en) * | 2019-08-30 | 2019-11-15 | 深圳安特医疗股份有限公司 | Syringe |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |