CN2706181Y - Injector with improved needle head jointing structure - Google Patents
Injector with improved needle head jointing structure Download PDFInfo
- Publication number
- CN2706181Y CN2706181Y CN 200420029064 CN200420029064U CN2706181Y CN 2706181 Y CN2706181 Y CN 2706181Y CN 200420029064 CN200420029064 CN 200420029064 CN 200420029064 U CN200420029064 U CN 200420029064U CN 2706181 Y CN2706181 Y CN 2706181Y
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- CN
- China
- Prior art keywords
- syringe
- syringe needle
- needle
- integrated structure
- peripheral face
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- 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.)
- Expired - Fee Related
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- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The utility model provides an injector with improved needle head jointing structure, comprising a needle head group and a clamping seat. The clamping seat is arranged inside an injection tube and is connected with the needle head group. The clamping seat is provided with a sleeve barrel element and a sealing member which is directly formed and is arranged on the sleeve barrel element. The sleeve barrel element is provided with a peripheral face and an internal ring face. The sealing member is made of material with plasticity and elasticity and the outer diameter of the sealing member is larger than the outer diameter of the peripheral face of the sleeve barrel element. Thus, the sealing member is sheathed in the injection tube in air seal elasticity mode; the clamping seat, the needle head group and the injection tube are in sealing air seal matched state so the injection liquid in the injection tube can not leak.
Description
Technical field
This utility model relates to a kind of syringe, relates in particular to a kind of syringe of avoiding the improvement syringe needle integrated structure of injection leakage.
Background technology
As Fig. 4, shown in Figure 5, be conventional injector, it includes a device in the block base 7, of an injection tube 6 inside and this block base 7 localized syringe needle group 8 that is spirally connected.This block base 7 has one can support the dish seat 71 that only is positioned at injection tube 6 inside, one is convexly equipped with cylindrical portion 72 and on this dish seat 71 sides along axis can be set in O shape ring 73 on this cylindrical portion, one end of these cylindrical portion 72 inboards is provided with a flange 74, and the other end is provided with an internal thread segment 75.This syringe needle group 8 has a needle stand 83, and these needle stand 8 one ends have an external thread section 81 that can be screwed with the internal thread segment 75 of this cylindrical portion 72, and the other end is a needle body 82, and this needle body 82 is installed in this needle stand 83 inside.
When block base 7 is packed into from injection tube 6 inside, and dish seat 71 supports and ends when injection tube 6 tops, as shown in Figure 5, syringe needle group 8 can be packed into from the front aperture 61 at an injection tube 6 tops, and this syringe needle group 8 is screwed with this block base 7.After use, utilize a push rod 9 to insert and make block base 7 obtain the inlay cards location in these injection tubes 6, push rod 9 is drawn back finish the work of taking in syringe needle group 8 from promptly again.
Above-mentioned existing injection needle integrated structure because this block base 7 all is made of plastics with syringe needle group 8, and both materials all belong to hard material, penetrates in the manufacture process at plastics in use, and material can produce different tolerances.Therefore, the process that screws togather at internal thread segment 75 and external thread section 81, because the influence of tolerance between the two, cause this internal thread segment 75 not good with external thread section 81 adaptations, make when this injection tube 6 uses, this internal thread segment 75 is subjected to a vertebra bar 9 to apply the influence of a pressure with external thread section 81, can cause the injection in this injection tube not oozed out by the place of screwing togather with external thread section 81 adaptations are good because of this internal thread segment 75.
So above-mentioned injection needle integrated structure truly has improved necessity.
The utility model content
In order to overcome the above-mentioned shortcoming that existing injection needle integrated structure exists, this utility model provides a kind of syringe that improves the syringe needle integrated structure, utilizes the design of block base and causes this syringe needle group and this block base closely to screw togather to prevent that the injection in the injection tube from oozing out.
The technical scheme that its technical problem that solves this utility model adopts is:
A kind of syringe that improves the syringe needle integrated structure comprises: syringe needle group and block base; It is characterized in that described syringe needle group has a needle stand, this needle stand one end is an external thread section, this thread segment extends axially and is provided with a bulge loop, and a needle body and that is installed in this needle stand inside is set on this needle stand and can be located at the lid of needle body outside; A described block base and a syringe needle group screw togather mutually, this block base is a hollow form, it has a sleeve member, be connected into type always and be installed in sealing member on the annular groove of this sleeve member, this sleeve member has the interior body that an outer sleeve body and is installed in this outer sleeve body inside, this outer sleeve body has a dish portion, and having one is convexly equipped with in this disk body side and is the pipe portion in circle footpath, with an outer peripheral face that produces around axis and one and this outer peripheral face be the inner peripheral surface of opposing setting, should have an inner ring surface around axis formation by interior body, this inner ring surface has first holding section that one day, axis protruded, one with the internal thread segment of this opposite setting in first holding section, be screwed for external thread section with this needle stand, one holding part between this first holding section and this internal thread segment, the guidance part of this first holding section, one side is located in a stop section and that is located at this first holding section and this holding part joining place.
The syringe of aforesaid improvement syringe needle integrated structure, wherein sealing member is can plasto elastic material to make with one, and is installed on the outer peripheral face of described sleeve member, the external diameter of sealing part is greater than the external diameter of pairing this outer sleeve body outer peripheral face.
The syringe of aforesaid improvement syringe needle integrated structure, wherein disk body is provided with many runner and several back-up blocks between this runner that radially extend.
The syringe of aforesaid improvement syringe needle integrated structure, wherein in body be by sealing member elongation moulding one inwardly via the conducting of runner.
The syringe of aforesaid improvement syringe needle integrated structure, wherein interior body is that a tool can plasto elastic material be made.
The syringe of aforesaid improvement syringe needle integrated structure, wherein guidance part is to be the taper hole shape.
This utility model utilizes the design of block base and causes this syringe needle group and this block base closely to screw togather to prevent that the injection in the injection tube from oozing out.
Description of drawings
Below in conjunction with drawings and Examples this utility model is further specified.
Fig. 1 is this utility model plane decomposing schematic representation
Fig. 2 is the profile of 2-2 line shown in Figure 1
Fig. 3 is a combination section of the present utility model, shows that a block base and a syringe needle group are screwed to be fitted in the situation of an injection tube inside
Fig. 4 is the exploded perspective sketch map of conventional injector
Fig. 5 is that conventional injector is used the back combination section, shows that a block base and a syringe needle group are screwed and are fitted in the situation of an injection tube inside
The specific embodiment
Seeing also Fig. 1 to Fig. 3, is the selected example structure of this utility model shown in the figure.
As shown in Figure 1, the embodiment of the syringe of this utility model improvement syringe needle integrated structure comprises that a block base 2, that is installed in this injection tube 1 (not shown) screws togather the syringe needle group 3 that is fixed on this block base 2.
This block base 2 interosculates with this syringe needle group 3, and this block base 2 is a hollow form, and it has a sleeve member 21, is connected into type and be installed in sealing member 22 on this sleeve member 21 always, annular groove 12 driving fit mutually of sealing part 22 and an injection tube 1.This sleeve member 21 have a outer sleeve body 23 and that a usefulness rigid plastics makes be installed in this outer sleeve body 23 inner and have by can plasto elastic material (can adopt the rubber material in the present embodiment) make one in body 24.This outer sleeve body 23 has a dish portion 231, for supporting the block holding part 11 that ends in injection tube 1, and have one and be convexly equipped with in this disk body 231 sides and be the pipe portion 232 in circle footpath, and one around outer peripheral face 233 that axis produced and one and the inner peripheral surface 234 of these outer peripheral face 233 opposing settings.As shown in Figure 2, this disk body 231 is provided with the many runner 235 and several back-up blocks 236 between this runner 235 that radially extend, and body 24 is by sealing member 22 elongation moulding one inwardly via the conducting of this runner 235 in this.It has one around the formed inner ring surface 241 of axis, this inner ring surface 241 has first holding section 242 that one day, axis protruded, one with the internal thread segment 243 of these first holding section, 242 opposite settings, be screwed for external thread section 311 with a needle stand 31, one holding part 244 between first holding section 242 and internal thread segment 243, the guidance part 246 of these first holding section, 242 1 sides is located in one stop section 245, that is located at this first holding section 242 and these holding part 244 joining places.This guidance part 246 is the taper hole shape.Sealing part 22 is can plasto elastic material to make with one, and is installed on the outer peripheral face 233 of sleeve member 21, and the external diameter of sealing part 22 is greater than the external diameter of pairing outer sleeve body 23 outer peripheral faces 233.
Above-mentioned syringe needle group 3 has a needle stand 31, these needle stand 31 1 ends are an external thread section 311, and this external thread section 311 extends axially and is provided with a bulge loop 312, be to the outer face of ending in pipe portion 232, support the fastening position for a lid 32, a needle body 33 and that is installed in needle stand 31 inside is set on this needle stand 31 and can be located at the lid 32 of needle body outside.
This utility model generally is to be installed in the injection tube 1 to use, as shown in Figure 2, during assembly, can earlier this block base 2 be packed into from the bottom of injection tube 1, when dish portion 231 supports the block holding part 11 that ends at injection tube 1, also combine closely with this annular groove 12 in the outside of sealing part 22, again the opening of this syringe needle group 3 from injection tube 1 is inserted in, and the material behavior of interior body 24 (being the rubber material in the present embodiment) is somebody's turn to do in utilization, make the external thread section 311 of this needle stand 31 be easy to screw togather with internal thread segment 243 packings of being somebody's turn to do interior body 24, make this syringe needle group 3 connect to one, promptly finish assembly in the injection tube 1 and this block base 2 is positioned at this syringe needle group 3 with this block base 2.
During use, as shown in Figure 3, in injection tube 1, be full of injection, on a push rod 4, apply an active force, injection is stressed and penetrates by a piston 41 on this push rod 4 and a tenon 42.Because the interior body 24 (is the rubber material at present embodiment) of this block base 2, has plasticity and elasticity, and the external thread section 311 of its internal thread segment 243 and this syringe needle group 3 is packing and screws togather state, makes the internal thread segment 243 of body 24 in this and 311 of the external thread sections of this syringe needle group 3 can not produce leakage.
Claims (6)
1. a syringe that improves the syringe needle integrated structure comprises: syringe needle group and block base; It is characterized in that,
Described syringe needle group has a needle stand, this needle stand one end is an external thread section, and this thread segment extends axially and is provided with a bulge loop, and a needle body and that is installed in this needle stand inside is set on this needle stand and can be located at the lid of needle body outside;
A described block base and a syringe needle group screw togather mutually, this block base is a hollow form, it has a sleeve member, be connected into type always and be installed in sealing member on the annular groove of this sleeve member, this sleeve member has the interior body that an outer sleeve body and is installed in this outer sleeve body inside, this outer sleeve body has a dish portion, and having one is convexly equipped with in this disk body side and is the pipe portion in circle footpath, with an outer peripheral face that produces around axis and one and this outer peripheral face be the inner peripheral surface of opposing setting, should have an inner ring surface around axis formation by interior body, this inner ring surface has first holding section that one day, axis protruded, one with the internal thread segment of this opposite setting in first holding section, be screwed for external thread section with this needle stand, one holding part between this first holding section and this internal thread segment, the guidance part of this first holding section, one side is located in a stop section and that is located at this first holding section and this holding part joining place.
2. the syringe of improvement syringe needle integrated structure according to claim 1, it is characterized in that described sealing member is can plasto elastic material to make with one, and be installed on the outer peripheral face of described sleeve member, the external diameter of sealing part is greater than the external diameter of pairing this outer sleeve body outer peripheral face.
3. the syringe of improvement syringe needle integrated structure according to claim 1 is characterized in that described disk body is provided with many runner and several back-up blocks between this runner that radially extend.
4. the syringe of improvement syringe needle integrated structure according to claim 1, it is characterized in that described in body be by sealing member elongation moulding one inwardly via the conducting of runner.
5. the syringe of improvement syringe needle integrated structure according to claim 1 is characterized in that described interior body is that a tool can plasto elastic material be made.
6. the syringe of improvement syringe needle integrated structure according to claim 1 is characterized in that described guidance part is to be the taper hole shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420029064 CN2706181Y (en) | 2004-05-28 | 2004-05-28 | Injector with improved needle head jointing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420029064 CN2706181Y (en) | 2004-05-28 | 2004-05-28 | Injector with improved needle head jointing structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2706181Y true CN2706181Y (en) | 2005-06-29 |
Family
ID=34849780
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420029064 Expired - Fee Related CN2706181Y (en) | 2004-05-28 | 2004-05-28 | Injector with improved needle head jointing structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2706181Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013010373A1 (en) * | 2011-07-18 | 2013-01-24 | 倍安德普医疗科技（上海）有限公司 | Safety self-disposable syringe with replaceable needle |
| WO2013127037A1 (en) * | 2012-02-29 | 2013-09-06 | Wang Zuyang | Needle retractable-type replaceable-needle safe self-destructing syringe |
| CN109498974A (en) * | 2019-01-18 | 2019-03-22 | 王敏 | Safety aid before a kind of chemotherapy |
-
2004
- 2004-05-28 CN CN 200420029064 patent/CN2706181Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013010373A1 (en) * | 2011-07-18 | 2013-01-24 | 倍安德普医疗科技（上海）有限公司 | Safety self-disposable syringe with replaceable needle |
| WO2013127037A1 (en) * | 2012-02-29 | 2013-09-06 | Wang Zuyang | Needle retractable-type replaceable-needle safe self-destructing syringe |
| CN109498974A (en) * | 2019-01-18 | 2019-03-22 | 王敏 | Safety aid before a kind of chemotherapy |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |