CN210170588U - Syringe with a needle - Google Patents
Syringe with a needle Download PDFInfo
- Publication number
- CN210170588U CN210170588U CN201920150922.9U CN201920150922U CN210170588U CN 210170588 U CN210170588 U CN 210170588U CN 201920150922 U CN201920150922 U CN 201920150922U CN 210170588 U CN210170588 U CN 210170588U
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- Prior art keywords
- plunger rod
- boring part
- insert
- boring
- annular
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Abstract
The utility model provides an injector, which comprises a cylindrical barrel body provided with a needle joint, wherein a first boring part and a second boring part are arranged inside the barrel body; a plunger disposed within the first bore portion; the plunger rod is arranged on the barrel, and the notches and/or the protrusions are symmetrically arranged in an array along at least one part of the length of the plunger rod; an insert provided in the second bore portion and provided with a cruciform opening for passage of the plunger rod, the two co-linear channels being provided with fingers which, in use, engage with an array of recesses and/or projections on the plunger rod; the surface of the cylinder wall where the second boring part is located is provided with an external thread structure, and the external thread structure of the second boring part is detachably provided with an insert pressing piece. The injector can effectively press and install the insert at the step-shaped structure of the second boring part through the pressing piece which is installed in place through the threads, so that the installation stability of the insert is improved.
Description
Technical Field
The utility model relates to an injection device especially relates to an injector.
Background
The use of the injector is relatively extensive, and the traditional injector usually directly pushes the injection liquid, and cannot give a certain prompt to an operator in the pushing process, for example, the operator is given a prompt (such as a voice prompt) when injecting a certain dose of injection medium, so that the operator can better know the completed injection dose.
In the medical and cosmetic field, if an injector with an injection dosage prompt can be provided, the technical operation can be completed by more attentive medical workers.
Patent publication CN104994897B discloses a syringe in which, in use, with the insert located within the second bore portion and the plunger rod passing through the bore defined by the insert, when the plunger rod is moved relative to the barrel along axis a-a, two fingers on the insert ride along notches and/or projections on the plunger rod to produce an audible click. This type of syringe can hear a click to help the physician speak the correct dose to the patient and to make the patient sure that the requested/prescribed dose has been administered.
The inventor finds that the structural strength between the insert and the barrel of the injector is insufficient in the using process, and the using effect is poor under the condition that the insert is loosened.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a syringe, it can improve the structural stability and the reliability of insert installation in the barrel.
The utility model provides a syringe, it includes: the needle joint is arranged at one end of the cylindrical barrel, a first boring part close to the needle joint and a second boring part close to the tail of the barrel are arranged in the barrel, the first boring part and the second boring part are adjacently arranged, and the inner diameter of the second boring part is larger than that of the first boring part, so that a step structure is formed at the position, adjacent to the first boring part, of the second boring part; a plunger disposed within the first bore portion and movable along an inner wall of the first bore portion, the plunger being made of an elastomer; the plunger rod is arranged in the barrel, one end of the plunger rod is connected with the plunger, the other end of the plunger rod is provided with the pressing head, and the plunger rod with the cross-shaped section is symmetrically provided with notches and/or bulges in an array along at least one part of the length of the plunger rod; an insert provided in the second bore portion and provided with a cruciform opening for passage of the plunger rod, the two co-linear channels being provided with fingers which, in use, engage with an array of recesses and/or projections on the plunger rod; the surface of the cylinder wall where the second boring part is located is provided with an external thread structure, the external thread structure arranged on the second boring part is detachably provided with an insert pressing piece, the pressing piece is provided with a cylindrical cylinder part with an internal thread structure and matched with the external thread structure, and an annular gland arranged at one end of the cylindrical cylinder part, and the free end of the annular gland is annularly provided with an annular pressure nozzle which extends towards the direction of the insert and presses the insert in a step structure.
Compared with the prior art, the utility model provides a piece is established through the pressure that the screw thread installation was taken one's place can effectually compress tightly the insert and install in the step-like structure department of second bore hole part, improves the stability of insert self installation to it is also comparatively convenient to dismantle and assemble.
Further, the pressing piece is a plastic piece.
Furthermore, the pressing piece is of an integrally formed structure.
Further, the handheld ear that the barrel set up is provided with annular protrusion towards press head one side, the plug-in components is pressed and is established the piece and be provided with the annular recess with annular protrusion complex.
Drawings
Fig. 1 is a schematic diagram of the structure of the syringe.
Fig. 2 is a schematic structural view of the pressing member.
Fig. 3 is a schematic view of another syringe structure.
Detailed Description
The present invention will now be described in more detail with reference to the drawings, in which preferred embodiments of the invention are shown, it being understood that one skilled in the art could modify the invention herein described while still achieving the beneficial effects of the invention. Accordingly, the following description should be construed as broadly as possible to those skilled in the art and not as limiting the invention.
As shown in fig. 1, a syringe includes: the structure comprises a cylindrical barrel body 1, wherein a needle joint 2 is arranged at one end of the barrel body, a first boring part 3 close to the needle joint 2 and a second boring part 4 close to the tail part of the barrel body are arranged in the barrel body, the first boring part 3 and the second boring part 4 are adjacently arranged, and the inner diameter of the second boring part is larger than that of the first boring part, so that a step structure is formed at the position, adjacent to the first boring part, of the second boring part; a plunger 5 disposed in the first bore portion and movable along an inner wall of the first bore portion, and made of an elastic body; the plunger rod 6 is arranged in the barrel, one end of the plunger rod is connected with the plunger 5, the other end of the plunger rod is provided with a pressing head 7, and the plunger rod with a cross-shaped section is symmetrically provided with notches and/or bulges 9 in an array along at least one part of the length of the plunger rod; an insert 8 provided in the second bore portion and provided with a cross-shaped opening for passage of the plunger rod, the two co-linear channels being provided with fingers which in use engage an array of recesses and/or projections on the plunger rod. The above structure is well known in the prior art, and reference may be made to related patent document (CN104994897B) mentioned in the background.
Referring to fig. 1, the surface of the wall of the second bore hole portion is provided with an external thread structure, the external thread structure extends to a handheld ear portion of the barrel, the external thread structure of the second bore hole portion is detachably provided with an insert pressing piece 10, the pressing piece comprises a cylindrical barrel portion 10a with an internal thread structure and matched with the external thread structure, and an annular gland 10b arranged at one end of the cylindrical barrel portion, and the free end of the annular gland is annularly provided with an annular pressure nozzle 10c which extends towards the direction of the insert and presses the insert into a stepped structure.
From the above, it can be seen that the pressing piece which is mounted in place through the thread structure of the injector can effectively press and mount the insert at the step-shaped structure of the second bore part, and the mounting stability of the insert is improved.
It should be noted that, referring to fig. 2, the insert pressing member 10 includes a cylindrical body (i.e. a cylindrical portion 10a, which is internally provided with an internal thread structure), an annular gland 10b is provided at one end of the cylindrical body, one side surface of the annular gland 10b is tightly attached to the right side surface of the barrel 1 (the left end surface of the side wall where the second bore portion is located, which is the end of the syringe away from the needle adaptor) after the insert pressing member is mounted in place, and in fig. 2, the free end of the annular gland 10b is provided with an annular pressing nozzle 10c which is annularly arranged, and the distance between the annular pressing nozzle 10c and the annular side wall (cylindrical portion) of the insert pressing member can enable the cylindrical portion where the second bore portion is located to be mounted in place. Referring to fig. 1, when the annular pressing nozzle abuts against the left end of the insert (at this time, the right end of the cylindrical barrel portion 10a in fig. 2 abuts against the left side surface of the hand-held ear, which can serve as a stop and a prompt for installation in place), the insert can be stably installed in the second bore portion by tightly abutting the insert against the stepped portion of the second bore portion with the annular pressing nozzle.
Alternatively, the press-fit member is a plastic member, which is of integrally formed construction, such as by one-piece casting.
Because the adjacent position between the first bore part and the second bore part forms a step-shaped structure (which is formed by the inner diameter of the first bore part being smaller than that of the second bore part), the end part of the insert can effectively abut against the step-shaped structure, and the insert can be firmly pressed in the second bore part by the pressing piece.
In the medical beauty field, although the cost of the injector is low compared with that of expensive treatment, under the condition that the traditional injector structure cannot effectively meet the requirement, the injector provided by the inventor can effectively make up for the defect.
The utility model provides an injector is owing to be provided with the semicircular bulge that the array arranged on the plunger rod (have the clearance between the adjacent semicircular bulge, the cross-section has this semicircular bulge structure for criss-cross plunger rod symmetrical arrangement), and be provided with in two cell bodies of symmetry in passing through the opening in the cross of insert with the meshing of semicircular bulge finger-like thing (can with the protruding slice of semicircular bulge meshing), thereby let the cooperation of semicircular bulge and finger-like thing and send the click sound at the in-process of plunger rod propelling movement injection liquid, just can let the semicircular bulge of finger-like thing cooperation click sound because the bellied adjacent distance of semicircular bulge can decide the propelling movement certain distance, thereby indicate corresponding injection dosage (this is decided by the bellied interval of adjacent semicircle, prior art such as ZL2014800057722 can be referred to the principle).
As another improvement, referring to fig. 3, the holding lug 11 of the cylinder is provided with an annular protrusion 11a on the side facing the pressing head, the insert pressing member is provided with an annular groove matched with the annular protrusion, the annular protrusion can guide the pressing member, and the annular protrusion can further improve the mounting structure strength of the pressing member after being mounted in place.
The above description is only for the preferred embodiment of the present invention, and does not limit the present invention. Any technical personnel who belongs to the technical field, in the scope that does not deviate from the technical scheme of the utility model, to the technical scheme and the technical content that the utility model discloses expose do the change such as the equivalent replacement of any form or modification, all belong to the content that does not break away from the technical scheme of the utility model, still belong to within the scope of protection of the utility model.
Claims (4)
1. A syringe, comprising:
the cylinder body is cylindrical, a needle joint is arranged at one end of the cylinder body, a first boring part close to the needle joint and a second boring part close to the tail part of the cylinder body are arranged in the cylinder body, the first boring part and the second boring part are adjacently arranged, and the inner diameter of the second boring part is larger than that of the first boring part, so that a step structure is formed at the position, adjacent to the first boring part, of the second boring part;
a plunger disposed within the first bore portion and movable along an inner wall of the first bore portion, the plunger being made of an elastomer;
the plunger rod is arranged in the barrel, one end of the plunger rod is connected with the plunger, the other end of the plunger rod is provided with the pressing head, and the plunger rod with the cross-shaped section is symmetrically provided with notches and/or bulges in an array along at least one part of the length of the plunger rod;
an insert provided in the second bore portion and provided with a cross-shaped opening for passage of the plunger rod, the two co-linear channels being provided with fingers which, in use, engage the array of recesses and/or projections on the plunger rod;
the annular pressing device is characterized in that an external thread structure is arranged on the surface of the cylinder wall where the second boring part is located, an inserting piece pressing piece is detachably arranged at the external thread structure of the second boring part, the pressing piece is provided with a cylindrical cylinder part with an internal thread structure and matched with the external thread structure, and an annular pressing cover arranged at one end of the cylindrical cylinder part, and the free end of the annular pressing cover is annularly provided with an annular pressing nozzle which extends towards the direction of the inserting piece and presses the inserting piece into the step structure.
2. The syringe of claim 1, wherein the compression member is a plastic member.
3. The syringe of claim 1 or 2, wherein the crimp is of one-piece construction.
4. Syringe according to claim 1 or 2, characterized in that the hand-held ears provided on the barrel, on the side facing the pressure head, are provided with annular projections, and in that the insert press-on is provided with annular grooves cooperating with the annular projections.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920150922.9U CN210170588U (en) | 2019-01-29 | 2019-01-29 | Syringe with a needle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920150922.9U CN210170588U (en) | 2019-01-29 | 2019-01-29 | Syringe with a needle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210170588U true CN210170588U (en) | 2020-03-24 |
Family
ID=69829282
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920150922.9U Active CN210170588U (en) | 2019-01-29 | 2019-01-29 | Syringe with a needle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210170588U (en) |
-
2019
- 2019-01-29 CN CN201920150922.9U patent/CN210170588U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP02 | Change in the address of a patent holder |
Address after: 201114 Room 201, 206-210, building 3, No. 999, Jiangyue Road, Minhang District, Shanghai Patentee after: SHANGHAI MOYANG BIOLOGICAL TECHNOLOGY Co.,Ltd. Address before: 201112 room 205, building 3, No. 999, Jiangyue Road, Minhang District, Shanghai Patentee before: SHANGHAI MOYANG BIOLOGICAL TECHNOLOGY Co.,Ltd. |
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| CP02 | Change in the address of a patent holder |