CN205095162U - Barrel - Google Patents
Barrel Download PDFInfo
- Publication number
- CN205095162U CN205095162U CN201520723008.0U CN201520723008U CN205095162U CN 205095162 U CN205095162 U CN 205095162U CN 201520723008 U CN201520723008 U CN 201520723008U CN 205095162 U CN205095162 U CN 205095162U
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- CN
- China
- Prior art keywords
- containing cavity
- holding chamber
- core bar
- cylindrical shell
- cavity
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The utility model discloses a simplified, its difficult sealed lamella that makes on the core bar produces plastic deformation to guarantee the leakproofness. This barrel includes the stack shell, is equipped with the cavity on the stack shell, is equipped with the connecting portion that supply the syringe needle unit mount on the front end of stack shell, the cavity includes holding chamber no. 1 and holding chamber no. 2, and holding chamber no. 1 is linked together with holding chamber no. 2, and the internal diameter in holding chamber no. 2 slightly is greater than the internal diameter in holding chamber no. 1, and the lateral wall in holding chamber no. 1 supplies the sealing element on the core bar to offset, and the lateral wall in holding chamber no. 2 supplies the sealing element on the core bar to offset.
Description
Technical field
This utility model belongs to the technical field of syringe, relates in particular to a kind of cylindrical shell of syringe.
Background technology
The syringe used in medical field is divided into according to its potted component structure has rubber stopper syringe and without rubber stopper syringe.Have rubber stopper syringe more common, it makes a rubber stopper with elastomeric material, and is fixed on the core bar of syringe, is formed be sealed and matched by rubber stopper and cylindrical shell.Core bar is comprised without rubber stopper syringe, one end of core bar is inserted in cylindrical shell, sealing device is fixed with in the front portion of core bar, described sealing device comprises the body be fixed on core bar and the sealing flap being fixed on body side, inwall in sealing flap and cylindrical shell is formed and is sealed and matched, and sealing flap, body and core bar are one-body molded.At seal aspect, this syringe without rubber stopper relies on the sealing between the structure realization of sealing flap with the inwall of cylindrical shell, and specifically, the natural resiliency restoring force by sealing flap makes sealing flap be close to mutually with the inwall of cylindrical shell and realizes sealing.This structure without rubber stopper syringe, at memory period, core bar is inserted in cylindrical shell, this just makes the sealing flap on core bar be subject to larger extruding force for a long time, sealing flap is made to produce irreversible distortion, make syringe inwall adhesive force of sealing flap and cylindrical shell in follow-up use procedure reduce and affect sealing, thus easily produce the phenomenon of leakage.
Summary of the invention
The purpose of this utility model is to provide a kind of cylindrical shell, and it not easily makes the sealing flap on core bar produce plastic deformation, thus ensures sealing.
The purpose of this utility model is achieved in that a kind of cylindrical shell, comprise stack shell, stack shell is provided with cavity, the front end of stack shell is provided with the connecting portion installed for needle assembly, described cavity comprises containing cavity one and containing cavity two, and containing cavity one is connected with containing cavity two, and the internal diameter of containing cavity two is slightly larger than the internal diameter of containing cavity one, the sidewall of containing cavity one offsets for the potted component on core bar, and the sidewall of containing cavity two offsets for the potted component on core bar.
In the upper of such scheme and as the preferred version of such scheme: described containing cavity two is positioned at the front end of containing cavity one.
In the upper of such scheme and as the preferred version of such scheme: described needle assembly is the safety syringe needle assembly of replaceable syringe needle.
In the upper of such scheme and as the preferred version of such scheme: be provided with many uniform in its circumferential direction convex tendons on the inner surface of described connecting portion.
This utility model gives prominence to compared to existing technology and useful technique effect is:
Cylindrical shell of the present utility model, owing to adopting the structure of containing cavity two on stack shell, provides the space discharging a part of pressure, potted component can be made not easily to produce plastic deformation to the potted component on core bar, thus ensures sealing.
Accompanying drawing explanation
Fig. 1 is the structural representation of cylindrical shell of the present utility model.
Fig. 2 is the sectional view of the syringe being equipped with cylindrical shell of the present utility model.
Detailed description of the invention
This utility model is further described with specific embodiment below in conjunction with accompanying drawing, see Fig. 1-Fig. 2;
A kind of cylindrical shell, comprises stack shell 1, the front end of stack shell 1 is provided with connecting portion 2, and connecting portion 2 is installed for the safety syringe needle assembly 3 of replaceable syringe needle.See Fig. 2, the safety syringe needle assembly 3 of replaceable syringe needle comprises needle tubing 31, needle holder 32, sealing-plug 33 and syringe needle cover for seat 34 etc.Wherein, needle tubing is fixed in needle holder and forms syringe needle.Syringe needle cover for seat 34 is provided with screw thread 341, and needle holder 32 can be screwed in this syringe needle cover for seat 34.By helicitic texture, the needle holder with needle tubing can be fixed on needle holder and put or it is unloaded from needle holder cover, to realize changing syringe needle.See Fig. 2, stack shell 1 is provided with cavity 4, described cavity comprises containing cavity 1 and containing cavity 2 42, containing cavity 1 is connected with containing cavity 2 42, the internal diameter of containing cavity 2 42 is slightly larger than the internal diameter of containing cavity 1, the sidewall 41a of containing cavity 1 offsets for the potted component 5 on core bar, is sealed and matched to be formed.The sidewall 42a of containing cavity 2 42 offsets for the potted component 5 on core bar, is sealed and matched to be formed.
The stack shell of the present embodiment, owing to adopting the structure of containing cavity two, provides the space discharging a part of pressure, can make potted component not easily plastic deformation, correspondingly extend the resting period of the syringe with this cylindrical shell to the potted component on core bar.
Preferably, described containing cavity 2 42 is positioned at the front end of containing cavity 1.As the direct distortion of this embodiment, the position of containing cavity two also can in the rear end of containing cavity one, and certainly, containing cavity two can also in other position.
In the present embodiment, the inner surface of described connecting portion 2 is provided with many convex tendons 21, and it is evenly distributed in the circumference of connecting portion 2 inner surface.
Above-described embodiment is only preferred embodiment of the present utility model, not limits protection domain of the present utility model according to this, therefore: all equivalence changes done according to structure of the present utility model, shape, principle, all should be covered by within protection domain of the present utility model.
Claims (4)
1. a cylindrical shell, comprise stack shell, stack shell is provided with cavity, the front end of stack shell is provided with the connecting portion installed for needle assembly, it is characterized in that: described cavity comprises containing cavity one and containing cavity two, and containing cavity one is connected with containing cavity two, the internal diameter of containing cavity two is slightly larger than the internal diameter of containing cavity one, the sidewall of containing cavity one offsets for the potted component on core bar, and the sidewall of containing cavity two offsets for the potted component on core bar.
2. cylindrical shell according to claim 1, is characterized in that: described containing cavity two is positioned at the front end of containing cavity one.
3. cylindrical shell according to claim 1, is characterized in that: described needle assembly is the safety syringe needle assembly of replaceable syringe needle.
4. cylindrical shell according to claim 1, is characterized in that: on the inner surface of described connecting portion, be provided with many uniform in its circumferential direction convex tendons.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520723008.0U CN205095162U (en) | 2015-09-14 | 2015-09-14 | Barrel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520723008.0U CN205095162U (en) | 2015-09-14 | 2015-09-14 | Barrel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205095162U true CN205095162U (en) | 2016-03-23 |
Family
ID=55510977
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520723008.0U Active CN205095162U (en) | 2015-09-14 | 2015-09-14 | Barrel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205095162U (en) |
-
2015
- 2015-09-14 CN CN201520723008.0U patent/CN205095162U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |