CN201235122Y - Needle structure for safety syringe - Google Patents
Needle structure for safety syringe Download PDFInfo
- Publication number
- CN201235122Y CN201235122Y CNU2007200754748U CN200720075474U CN201235122Y CN 201235122 Y CN201235122 Y CN 201235122Y CN U2007200754748 U CNU2007200754748 U CN U2007200754748U CN 200720075474 U CN200720075474 U CN 200720075474U CN 201235122 Y CN201235122 Y CN 201235122Y
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- needle stand
- needle
- fin
- syringe
- stand
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Abstract
The utility model discloses a syringe needle structure used on a safe syringe, which is characterized in that the syringe needle is formed by an upper needle stand and a lower needle stand which are sleeved, wherein the lower portion of the inner wall of the inner cavity of the lower needle stand is provided with a lower syringe needle convex rib, when in assembling, a sheath, the upper needle stand and the lower needle stand are assembled on the tube neck of a tube body of the syringe from top to bottom. The syringe needle structure has convenient assemblage and high automatic production, which effectively improves production efficiency, and lowers manufacture cost, the integral structure of the syringe needle structure is reasonable, and the working stability is improved in tests of practical use. A withdrawing mechanism on the end portion of a core rod of the syringe can be tightly engaged with the lower syringe needle convex rib arranged on the lower portion of the inner wall of the inner cavity of the lower needle stand, and the syringe needle is completely pulled into the inner cavity of the tube body of the syringe. The syringe needle structure achieves a safe effect, which avoids injuring medical staffs and other related persons mistakenly during operation.
Description
Technical field:
This utility model relates to technical field of medical, a kind of specifically needle head structure that is used for safety injector, particularly its mechanical connecting structure.
Background technology:
Since disposable syringe is widely used, a large amount of abandoned land syringes bring environmental pollution problems, and the syringe after using is often stabbed medical personnel, cause the patient on one's body virus or antibacterial along with the syringe after using infects to medical personnel, and cause medical personnel to catch an illness or dead.These malpracticees, often there is what is heard various countries, and particularly catching the innate immunity insufficiency disorder time group virus that can't treat at present is HIV (human immunodeficiency virus) etc., more causes medical personnel to be subjected to not guilty injury.
In order to address this problem, there are many inventors to drop into intelligence one after another, financial resources, do all one can to develop the haulback type syringe of various different structures, for example, utilization is installed in the entry needle that the elastic force of the spring between syringe and the piston is over injection and retracts in the syringe, but owing to be liquid medicine injection, so the material of spring is limited by strictness, so that its complex structure, manufacturing cost is too high, also there are many inventors successively to invent the various safety injectors that do not need to use spring, utilize the clip of being invented that plunger and entry needle are snapped together mutually, thereby when retracting plunger, together entry needle is drawn in the syringe, thereby reached the purpose of avoiding entry needle to stab medical personnel or other people on the scene.
In order to prevent liquid leakage, and in order to prevent that entry needle is from the syringe accidental, therefore between entry needle and the syringe combine must be firmly, if but between entry needle and syringe combine too firmly the time, entry needle is not easy to pull out in the back stitching tube again, these two require contradiction each other, and are perplexing all inventors all the time.
Moreover, the needle head structure more complicated of existing safety injector, packaging efficiency is low, and automaticity is low, can't mass automatic production, product competitiveness is poor.
Documents one, the patent No.: ZL94103945.5, notification number: CN1100958, patentee: Inviro Medical Devices Ltd., a kind of " safety injector with needle guard and recoverable syringe needle " disclosed in this case, its principal claim content is: a kind of syringe, comprise a plunger and joint elements that have syringe needle, and these joint elements are tightened against the end of needle tubing.Joint elements and plunger respectively carry the syndeton that matches, and they can rotate with respect to needle tubing together when joint elements and plunger are engaged with each other, and syringe needle is withdrawn in the needle tubing.The surface of matching on needle guard and the needle stand can engage one another, and only will unscrew the opposite moment of torsion of direction with joint elements and be applied on the joint elements.Needle guard rotates in opposite direction, and the moment of torsion that joint elements are applied is not enough to the end of joint elements from needle tubing unscrewed.
Documents two, application number: 01141707.2, notification number: CN1406643, patentee: Luo Bizhang, disclose a kind of " needle holder of safety injector " in this case, its principal claim content is: this utility model mainly comprises injection tube, needle holder and pressure rings.The joint portion of needle holder leading portion is fixedly arranged in the little inside diameter of injection tube leading portion, and the holding section of back segment is provided with short slot, and the short slot content is provided with movable piece, and movable piece links sheet with the rear and is connected with on the holding section.Pressure rings is sheathed between the shoulder and flange of injection tube back segment large diameter portion inwall, and just in time corresponding to needle holder back segment holding section.Pressure rings inwardly is convexly equipped with shell fragment in corresponding short slot place, impels movable piece slightly inwardly outstanding.
Documents three, application number: 971900604, notification number: CN1178474, patentee: Specialized Health Products, Inc., a kind of " injector for medical purpose and self-retracting needle apparatus " disclosed in this case, its principal claim content is: a compositions, comprise an injector for medical purpose and an extended and self-retracting medical needle apparatus, described compositions comprises: a syringe cylinder part, comprise an elongate hollow cylindrical part and the end closed portion with an inner surface, the latter also has an inner surface; A plunger assembly is positioned at this hollow cylindrical part to small part, this assembly liquid containing space of formation that combines with this syringe cylinder, and the latter's volume can change with respect to reorientating of this plunger assembly because of this barrel part; This space to small part is limited by described inner surface; Described plunger assembly comprises: an elongate hollow shell, have an outer surface and one first end and one second end, the size of this outer surface allows it contactlessly to slide in described cylindrical form interior surface, this first end is placed within the described tube, and this second end is relevant with stretching out of described device; Described shell further comprise one can be by the lower part, the latter can be approaching from this barrel part outside by user; A stopper that cooperates certain locking mechanism, the arrangement of this stopper can be blocked it and can be pressed the position with this actual alternative this locking mechanism is arranged after this device stretches out; This extended and self-retracting medical needle apparatus comprises: an elastic hose, link to each other with this first end of described shell a rear end, and after this device stretches out, when the available use of this device, provide the retracting force and a liquid communication channel between a medical needle and this liquid containing space of a storage at least; A sleeve pipe mechanism, comprise a rear portion hose connector, a locking mechanism that can discharge connection and cooperate with this stopper, this connector can be connected this device securely with the front end in described flexible pipe ground, this connection is connected a drawing mechanism with described device.
This shows, still there are many defectives in above-mentioned existing safety injector with the syringe needle that is used for safety injector, still need prior art is further improved, the inventor is based on abundant practical experience and Professional knowledge, through constantly research, design, and after studying sample and improvement repeatedly, create this utility model finally.
Summary of the invention:
The purpose of this utility model is to provide a kind of needle head structure that is used for safety injector, and it can overcome existing product structure poor practicability, poor work stability, the packaging technology complexity, the assembling automaticity is low, and production efficiency is low, the production cost height, the shortcoming and defect that product competitiveness is low.
To achieve these goals, the technical solution of the utility model is: a kind of needle head structure that is used for safety injector, it mainly comprises needle tubing, needle tubing is arranged in the syringe needle, it is characterized in that: described syringe needle is socketed to form by last needle stand and following needle stand, and the bottom of cavity wall is provided with down the needle holder convex tendon in the following needle stand.
The utility model discloses the needle head structure that is used for safety injector, syringe needle is by needle tubing, last needle stand, following needle stand, sheath constitutes, the bottom of last needle stand forms whole needle stand body after being inserted in down the needle stand inner chamber, sheath during assembling, last needle stand, following needle stand once is assembled in the tube neck of injector cartridge from top to bottom, it is convenient to assemble, can realize increasingly automated production, effectively improved production efficiency, reduce manufacturing cost, the product reasonable integral structure, in actual service test, working stability performance height, the mechanism that pulls back of piston boom end can be provided with down the needle holder convex tendon with the bottom of cavity wall in the following needle stand and closely cooperate, and syringe needle integral body is drawn in the syringe cylinder intracoelomic cavity, realize safe effect, avoided accidental injury medical personnel in operation and other related personnel.
Description of drawings:
Fig. 1 is this utility model structural representation
Fig. 2 is a needle stand structural representation on this utility model
Fig. 3 is a needle stand structural representation under this utility model
Fig. 4 is this utility model jacket structure sketch map
Fig. 5 is this utility model first assembled state reference diagram
Fig. 6 is this utility model second assembled state reference diagram
Fig. 7 is this utility model the 3rd assembled state reference diagram
Wherein:
1 needle tubing
2 needle stands
Needle stand on 3
4 times needle stands
5 sheaths
6 fins
Needle stand spacing ring on 7
8 times needle holder convex tendons
Needle stand position limiting convex ring on 9
10 times needle stand position limiting convex rings
11 sheath bulge loops
12 times needle stand limited impressions
13 grooves
The specific embodiment:
With reference to the accompanying drawings, this utility model further is described
This utility model is a kind of needle head structure that is used for safety injector, it mainly comprises needle tubing 1, needle tubing is arranged in the needle stand 2, it is characterized in that: described needle stand 2 is socketed to form by last needle stand 3 and following needle stand 4, the bottom of cavity wall is provided with down needle holder convex tendon 8 in the following needle stand 4, the described needle stand 2 outer sheaths 5 that are socketed with, the inner chamber hollow of sheath 5, the interior diameter of its inner chamber is between 3mm-9mm, the bottom of sheath 5 outer walls is provided with sheath bulge loop 11, last needle stand 3 inner chamber hollows, the outer wall place on last needle stand 3 tops is provided with four fins 6, become 45 angles of spending between the every fin 6, symmetrical in twos between fin 6 and the fin 6, fin 6 can play strengthens firm effect, the total length of line is 3mm-9mm between fin 6 and the fin 6, the length of fin 6 is 1.5mm-15mm, last needle stand 3 middle parts are provided with needle stand spacing ring 7, the side of fin 6 is fixed in the outer wall on needle stand 3 tops, the upper surface of needle stand spacing ring 7 is fixed on the base of fin 6, fin can guarantee that when assembling sheath can double swerve or rotation, the diameter of last needle stand spacing ring 7 is greater than sheath 5 intracavity diameter 0.15mm-3mm, the diameter of last needle stand spacing ring 7 is greater than the total length 0.15mm-3mm of line between fin 6 and the fin 6, the thickness of last needle stand spacing ring 7 is 0.5mm-16mm, the lower surface of sheath bulge loop 11 parallels with the upper surface of last needle stand spacing ring 7, the upper surface that the lower surface of sheath bulge loop 11 props up needle stand spacing ring 7 during assembling advances downward vertically, the outer wall of last needle stand 3 bottoms is provided with the annular needle stand position limiting convex ring 9 of going up, following needle stand 4 inner chamber hollows, following needle stand 4 outer wall tops are provided with down needle stand position limiting convex ring 10, the thickness of following needle stand position limiting convex ring 10 is at 0.1mm-1.8mm, the outside dimension of following needle stand position limiting convex ring 10 is greater than last needle stand spacing ring 7 external diameter 0.13mm-20mm, the outside dimension of following needle stand position limiting convex ring 10 is greater than following needle stand overall diameter 0.1mm-0.8mm, the height of following needle stand 4 is 2mm-15mm, the inwall place of following needle stand 4 inner chambers is provided with the following needle stand limited impression 12 that can match with last needle stand position limiting convex ring 9, when assembling is finished, last needle stand position limiting convex ring just in time is stuck in down in the needle stand limited impression, following needle holder convex tendon 8 can be linear annular muscle, many the annular muscle that perpendicular muscle constitutes, the annular muscle that a plurality of raised points constitute, the upper surface of the ring bodies that following needle holder convex tendon 8 constitutes can be provided with the groove 13 that circularizes, the upper surface of the ring bodies that following needle holder convex tendon 8 constitutes also can be the plane, following needle holder convex tendon 8 can match with the mechanism that pulls back of piston boom end and merge tight interlock, pull back core bar after injection is finished and needle holder integral body can be drawn in the syringe cylinder intracoelomic cavity, realize the syringe safe function, avoided the generation of malpractice.
Claims (7)
1, a kind of needle head structure that is used for safety injector, it mainly comprises needle tubing (1), needle tubing is arranged in the needle stand (2), it is characterized in that: described needle stand (2) is socketed to form by last needle stand (3) and following needle stand (4), and the bottom of the interior cavity wall of following needle stand (4) is provided with down needle holder convex tendon (8).
2, a kind of needle head structure that is used for safety injector according to claim 1, it is characterized in that: the outer sheath (5) that is socketed with of described needle stand (2), the inner chamber hollow of sheath (5), the interior diameter of its inner chamber are between 3mm-9mm, and the bottom of sheath (5) outer wall is provided with sheath bulge loop (11).
3, a kind of needle head structure that is used for safety injector according to claim 1, it is characterized in that: described needle stand (3) the inner chamber hollow that goes up, the outer wall place on last needle stand (3) top is provided with four fins (6), become the angle of 45 degree between the every fin (6), symmetrical in twos between fin (6) and the fin (6), the total length of line is 3mm-9mm between fin (6) and the fin (6), the length of fin (6) is 1.5mm-15mm, last needle stand (3) middle part is provided with needle stand spacing ring (7), the side of fin (6) is fixed in the outer wall on needle stand (3) top, the upper surface of needle stand spacing ring (7) is fixed on the base of fin (6), the diameter of last needle stand spacing ring (7) is greater than sheath (5) intracavity diameter 0.15mm-3mm, the diameter of last needle stand spacing ring (7) is greater than the total length 0.15mm-3mm of line between fin (6) and the fin (6), and the thickness of last needle stand spacing ring (7) is 0.5mm-16mm.
4, a kind of needle head structure that is used for safety injector according to claim 1 is characterized in that: the described outer wall of going up needle stand (3) bottom is provided with the annular needle stand position limiting convex ring (9) of going up.
5, a kind of needle head structure that is used for safety injector according to claim 1, it is characterized in that: described needle stand (4) inner chamber hollow down, following needle stand (4) outer wall top is provided with down needle stand position limiting convex ring (10), the thickness of following needle stand position limiting convex ring (10) is at 0.1mm-1.8mm, the outside dimension of following needle stand position limiting convex ring (10) is greater than last needle stand spacing ring (7) external diameter 0.13mm-20mm, the outside dimension of following needle stand position limiting convex ring (10) is greater than following needle stand overall diameter 0.1mm-0.8mm, the height of following needle stand (4) is 2mm-15mm, and the inwall place of following needle stand (4) inner chamber is provided with the following needle stand limited impression (12) that can match with last needle stand position limiting convex ring (9).
6, a kind of needle head structure that is used for safety injector according to claim 2 is characterized in that: the lower surface of described sheath bulge loop (11) parallels with the upper surface of last needle stand spacing ring (7).
7, a kind of needle head structure that is used for safety injector according to claim 1, it is characterized in that: described needle holder convex tendon (8) down can be the annular muscle of linear annular muscle, the annular muscle of many perpendicular muscle formations, a plurality of raised points formation, the upper surface of the ring bodies that following needle holder convex tendon (8) constitutes can be provided with the groove (13) that circularizes, and the upper surface of the ring bodies that following needle holder convex tendon (8) constitutes also can be the plane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200754748U CN201235122Y (en) | 2007-10-16 | 2007-10-16 | Needle structure for safety syringe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200754748U CN201235122Y (en) | 2007-10-16 | 2007-10-16 | Needle structure for safety syringe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201235122Y true CN201235122Y (en) | 2009-05-13 |
Family
ID=40647856
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200754748U Expired - Fee Related CN201235122Y (en) | 2007-10-16 | 2007-10-16 | Needle structure for safety syringe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201235122Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013127261A1 (en) * | 2012-02-29 | 2013-09-06 | Wang Zuyang | Needle base structure for use in safe self-destructing syringe |
| CN113101463A (en) * | 2021-03-16 | 2021-07-13 | 湛江健力源医疗用品有限公司 | Puncture-proof injection needle and injector comprising same |
-
2007
- 2007-10-16 CN CNU2007200754748U patent/CN201235122Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013127261A1 (en) * | 2012-02-29 | 2013-09-06 | Wang Zuyang | Needle base structure for use in safe self-destructing syringe |
| CN113101463A (en) * | 2021-03-16 | 2021-07-13 | 湛江健力源医疗用品有限公司 | Puncture-proof injection needle and injector comprising same |
| CN113101463B (en) * | 2021-03-16 | 2022-11-11 | 湛江健力源医疗用品有限公司 | Puncture-proof injection needle and injector comprising same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090513 Termination date: 20141016 |
|
| EXPY | Termination of patent right or utility model |