CN2744356Y - Retraction type safety syringe - Google Patents
Retraction type safety syringe Download PDFInfo
- Publication number
- CN2744356Y CN2744356Y CN 200420013798 CN200420013798U CN2744356Y CN 2744356 Y CN2744356 Y CN 2744356Y CN 200420013798 CN200420013798 CN 200420013798 CN 200420013798 U CN200420013798 U CN 200420013798U CN 2744356 Y CN2744356 Y CN 2744356Y
- Authority
- CN
- China
- Prior art keywords
- headkerchief
- sleeve
- connection block
- push rod
- entry needle
- 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.)
- Expired - Lifetime
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Abstract
The utility model provides a retraction type safety syringe, comprising an outer tube, a top cap sleeve, a connecting seat, a push rod and a needle. The front end of the tube body of the outer tube is sheathed with the top cap sleeve. The inner cavity of the top cap sleeve is sheathed with the connecting seat which is connected with the needle. The push rod is installed in the inner cavity of the outer tube, and the push rod is used to extract injection or inject, and draws the connecting seat. The inner wall of the top cap sleeve is provided with a double threaded screw. The other end of the tube body is jointed with a sealing annular ring through thermokarst. The connecting seat which is installed in the top cap sleeve is composed of a convex small pipe and a seat body portion. The seat body portion is provided with a device used to be fastened with the push rod to make the push rod draw the connecting seat to retract into the interior of the outer tube. The utility model can make the connecting seat and the injection needle retract into the inner cavity of the outer tube. So the safety protection can be realized, and the leakproof reliability of the injection can be ensured. The choking composition of the connecting seat from the front end of the outer tube can improve the accessibility of assembly.
Description
[technical field]
This utility model relates to a kind of retraction type safety syringe.
[background technology]
See also Fig. 1, traditional syringe cylinder mainly is made up of a hollow urceolus, a push rod and an entry needle, wherein, the front end of this urceolus is that one connects an excircle and is the protrusion tubule that awl column and center are provided with hollow duct, when the device entry needle, the needle stand that grips entry needle with hands inserts in the protrusion tubule, engages with the needle stand hand of entry needle by the awl cylinder that protrudes tubule periphery circle; This push rod shaft is to being to be installed in this urceolus intracavity again, by this push rod pull action, makes injection be sucked up to a chamber via needle tubing, needle stand, protrusion tubule.After injection is pumped to predetermined dosage, can inject operation, or cover back stitching lid, with openhanded relaxation and the entry needle that protrudes the urgent pressing of tubule, with this entry needle removal, the new entry needle that changes the outfit is injected operation again.The injection operation is to push action by this push rod, and injection is injected in the body through protruding tubule, needle stand, needle tubing by outer tube inner chamber.Because the entry needle of this syringe cylinder engages with the protrusion tubule, only rely on and oppress entry needle with hands and make it be placed in the protrusion tubule, in the practice of operation, press the danger eyelid that action causes entry needle accidental in operation easily because of operator are untrue.
In order to prevent this untrue accident of pressing action and causing entry needle to come off in operation of operator, see also Fig. 2, it is another traditional syringe cylinder, mainly formed by a hollow urceolus, a push rod and an entry needle, wherein, the front end of this urceolus is provided with a screwed pipe and and protrudes tubule, and this urceolus, screwed pipe and protrusion tubule are formed in one.When desire is assembled in the syringe front end with entry needle, the needle stand inner chamber of entry needle is inserted in the protrusion tubule, with hands this entry needle that turns clockwise, then the flange of needle stand cavity is subjected to the guiding of this screwed pipe screw thread, can closely be placed in this protrusion tubule, and by the dental groove of this screwed pipe screw thread and the blocking of this needle stand cavity flange, the situation that makes entry needle not have accidental takes place.When carrying out the syringe cylinder operation, retreat by this push rod of pull, carry out the suction operation of injection.After injection is pumped to predetermined dosage, can inject operation, or cover back stitching lid, with this entry needle of hands inhour rotation,, behind the new entry needle that changes the outfit, inject operation again with this entry needle removal.
Because the urceolus of traditional syringe cylinder, protruding tubule or screwed pipe all is to form one, its entry needle does not have the function that the safety retraction is taken in, in order to address this problem, then develop the retraction type safety syringe that a kind of special-purpose entry needle in recent years, it mainly is made up of the push rod that a urceolus assembly one can move back and forth, and be somebody's turn to do outer tube inner chamber directly is hinged with a special facture in the front end place special-purpose entry needle, when injection finish and with this push rod when this entry needle direction is moved to the stroke end, formation by this push rod front end and this special use entry needle, can make this push rod and this special use entry needle clamping, at this moment, this push rod of pull backward, can should the displacement of special use entry needle enter this outer tube inner chamber by leader tape, thus, after the injection operation is finished, this special use entry needle can bounce back and enter this outer tube inner chamber, and avoided this entry needle to be exposed to the outside formed harm of stabbing, but, in the operation practice, cause safety and sanitation and unhandy misgivings because the retraction type safety syringe of this special use entry needle does not have the function of changing entry needle.
Retraction type safety syringe that again should the special use entry needle only is suitable for the special-purpose entry needle of its special facture, thus can't reach the effect of extensive widespread usage, so be necessary to do further to study to improve.
[utility model content]
The purpose of this utility model is to provide a kind of retraction type safety syringe, and the entry needle of the various different sizes that can change the outfit easily according to need makes Connection Block can bounce back together with entry needle and enters the urceolus intracavity, realizes security protection; And make headkerchief sleeve, Connection Block fill in combination from outer cylinder front end, improve the convenience of assembling and prevent that injection from releasing from the outer cylinder front end inner chamber, has the effect of leakproof.
A kind of retraction type safety syringe of the present utility model comprises a urceolus, a headkerchief sleeve, a connecting seat, a push rod and an entry needle; This urceolus is a hollow tube, its front end inner chamber and headkerchief sleeve fit, the telescopic inner chamber of this headkerchief again with this Connection Block fit mutually, make this Connection Block place outer tube inner chamber front end; This push rod device tube inner chamber outside this, but this this Connection Block of push rod drawing enters this urceolus inside together with entry needle; It is characterized in that:
This headkerchief sleeve is a body in a tubular form, is provided with double thread in the telescopic inwall of this headkerchief, by the hub flange mutually blocking of this double thread with entry needle, advances entry needle tightly to be placed on the awl cylinder of the set protrusion tubule of Connection Block according to this; The double wedge that adjoins and establish several ring-type configurations in the telescopic inwall double thread of this headkerchief end:
This Connection Block comprises protrusion tubule and the seat body portion that one constitutes, and combines with this push rod buckle with this body portion; This protrusion tubule is that an excircle is the awl column and the center is provided with hollow duct, and this protrusion tubule is to be placed in the telescopic stack shell of this headkerchief, auspiciously before this protrusion tubule engage, and this protrusion tubule rear end extends to a body portion of this Connection Block and is connected with the needle stand of entry needle; This body portion periphery ring-type sets several buckle teeth, and the double wedge of this buckle teeth of mat and headkerchief sleeve intracavity is fastened.
Described retraction type safety syringe is characterized in that: this headkerchief sleeve, Connection Block are to be the isolating member of three with this urceolus.
Described retraction type safety syringe is characterized in that: effective thread length of this double thread is equal to or less than 1/2nd of full thread length.
Described retraction type safety syringe is characterized in that: this headkerchief sleeve back segment adds a sealing ring, is interference fit between sealing ring and outer tube inner chamber and sealing ring and the Connection Block.
Described retraction type safety syringe is characterized in that: the sealing ring is the tubular body by the elastomeric material molding, and sealing ring and this headkerchief sleeve are that heat is melted to combine and formed integrated.
Retraction type safety syringe of the present utility model, the front end of this urceolus be and headkerchief sleeve fit, the telescopic inner chamber of headkerchief again with Connection Block fit mutually, and the protrusion tubule of this Connection Block is located at this outer tube inner chamber front end place, uses the linking entry needle; This push rod device tube inner chamber outside this can carry out pull and push motion again, can carry out medicinal liquid and extract or inject, and this Connection Block of drawing enters this urceolus inside together with entry needle.
This headkerchief sleeve is to be placed in this outer tube inner chamber front end, the telescopic stack shell one end inwall of this headkerchief is provided with the double thread of half-turn, stack shell hold heat to fuse unification sealing ring cast in addition to be integral, outer circumference surface by stack shell closely cooperates with outer tube inner chamber, use preventing that injection from releasing from the outer cylinder front end inner chamber, produce the effect of leakproof.
This Connection Block is to be installed in this headkerchief sleeve, and this Connection Block comprises protrusion tubule and the seat body portion that one constitutes, and combines with this push rod buckle with this body portion; This protrusion tubule is that an excircle is the awl column and the center is provided with hollow duct, and this protrusion tubule is to be placed in the telescopic stack shell of this headkerchief, auspiciously before this protrusion tubule engage, and this protrusion tubule rear end extends to a body portion of this Connection Block and is connected with the needle stand of entry needle; This body portion periphery ring-type sets several buckle teeth, the double wedge of this buckle teeth of mat and headkerchief sleeve intracavity is fastened, the outer circumference surface and the telescopic sealing ring of the headkerchief inner chamber of the seat body portion of Connection Block closely cooperate, and use preventing that injection from releasing from the headkerchief sleeve lining, produce the effect of leakproof.
More than be the general introduction of this utility model structure, and followingly more lift preferable feasible specific embodiment, and cooperate graphic detailed description.
[description of drawings]
Fig. 1 is existing syringe cylinder structural representation.
Fig. 2 is another kind of existing syringe cylinder structural representation.
Fig. 3 is the three-dimensional exploded view of this utility model first embodiment.
The axial cutaway view of Fig. 4 this utility model first embodiment.
Fig. 5 is the 2-2 profile of Fig. 4.
The axial cutaway view of Fig. 6 this utility model first embodiment user mode.
The axial cutaway view of Fig. 7 this utility model second embodiment.
[specific embodiment]
See also Fig. 3～6, this utility model retraction type safety syringe, mainly comprise a urceolus 10, a headkerchief sleeve 40, a connecting seat 30, a push rod 20 and an entry needle 90, wherein, this urceolus 10 is a hollow tube, and these urceolus 10 inner chambers radially protrude in the adjacent front end place and form a protruding ring 13, and make these urceolus 10 inner chambers form an ante-chamber 12 and a back cavity 14.
This headkerchief sleeve 40 is that stack shell 400 fuses the tubular body that closes formation with the heat that seals ring 50, is to press to be fitted to this ante-chamber 12; The periphery of these headkerchief sleeve 40 its stack shells 400 and the ante-chamber 12 of this urceolus 10 are interference fit, for fixing this headkerchief sleeve 40; Sealing ring 50 is the tubular bodies by elastomeric material (as: rubber) molding, and closely cooperating by sealing ring 50 peripheries circle and these urceolus 10 ante-chamber 12 inwalls, form 40 in ante-chamber 12 and this headkerchief sleeve according to this and form sealing property, can improve the reliability of injection leakproof.The double wedge 45 that adjoins and establish in addition several ring-type configurations in the inwall thread end of this headkerchief sleeve 40.
This headkerchief sleeve 40 is provided with double thread 46 in stack shell 400 inwalls, this each screw thread 46 each other the phase angle each other 180 the degree, and the effective thread length of each of this double thread is equal to or less than half length of full tooth, use needle stand 92 flanges 921 of the dental groove blocking entry needle that prevents double thread, make entry needle can't bounce back to urceolus 10 intracavity.
This Connection Block 30 is to be made of a protrusion tubule 32 and body portion 34 one, and is placed in the intracavity of this headkerchief sleeve 40; The end of the seat body portion 34 of this Connection Block 30 and the protruding ring 13 of urceolus 10 inner chambers form and support shape, for resisting the back cavity 14 that this Connection Block 30 is retracted into urceolus 10; The protrusion tubule 32 of this Connection Block 30 also is placed in the intracavity of headkerchief sleeve 40 again, and extends to the 40 inner tapered shape expansions of headkerchief sleeve from the mouth of pipe place of headkerchief sleeve 40, is connected with this body portion 34; The sealing ring 50 of these body portion 34 excircles and headkerchief sleeve 40 is interference fit again, to form the sealing property of 30 of this headkerchief sleeve 40 and Connection Blocks, can improve the reliability of injection leakproof.
These body portion 34 periphery ring-types set several buckle teeth 362 again, and the set double wedge 45 of this buckle teeth of mat 362 and headkerchief sleeve 40 intracavity is fastened, and limit this Connection Block 30 according to this and form and only revolve, to improve the reliability that Connection Block 30 engages with entry needle.
This utility model is by urceolus 10, the formation of separate type configurations such as headkerchief sleeve 40 and Connection Block 30, when the operation syringe cylinder, get an entry needle 90 with hands its needle stand 92 inner chambers are packed into protrusion tubule 32, and the entry needle 90 that turns clockwise, the flange 921 of needle stand 92 will be equipped in the dental groove of headkerchief sleeve 40 inner chamber threads, and because of the entry needle 90 that turns clockwise, making the flange 921 of needle stand cavity be subjected to pushing away of this screwed pipe screw thread draws, can be locked on this protrusion tubule 32 with connecting airtight really, and the retaining effect by this screwed pipe screw thread and this needle stand 92 cavity flanges 921 can not meet accident entry needle and comes off.When carrying out the syringe cylinder operation, retreat by this push rod 20 of pull, carry out the suction operation of injection.After injection is pumped to predetermined dosage, can inject operation, or cover back stitching lid, with this entry needle of hands inhour rotation,, behind the new entry needle that changes the outfit, inject operation again with this entry needle removal.When push rod 20 propelling movement injection advance to stroke near terminal point, combine by the buckle of these push rod 20 front ends with the seat body portion 34 of this Connection Block 30, enter this urceolus 10 inside for these push rod 20 leader tape Connection Blocks 30 together with entry needle 90 retractions, reach the security purpose of needle point guard; Because the formation of the seat body portion 34 of this push rod 20 and this Connection Block 30 there is no technically with this utility model must be related, so do not describe in detail.
Aforementioned first embodiment is when assembling, can earlier this Connection Block 30 be inserted this headkerchief sleeve 40, again this headkerchief sleeve 40 directly being inserted in urceolus 10 ante-chambers 12 together with Connection Block 30 from these urceolus 10 front ends connects and establishes, can finish assembling operation, hence one can see that, this utility model since on the assembly program be can be directly with this Connection Block 30 from these urceolus 10 front loaded assembling operations of finishing this Connection Block 30, so can improve the convenience that this Connection Block 30 is assembled.
Moreover, when entry needle 90 installings, its needle stand 92 flanges 921 are because of hand-screw then be subjected to the passing of this screw thread 46, and screw in this headkerchief sleeve 40 inside, when treating that these needle stand 92 end flange 921 arrive near this screw thread 46 ends, this needle stand 92 promptly with the closely socket mutually of this tubule 32, can utilize push rod to extract injection and enter outer tube inner chamber to the dosage of being scheduled to, inject operation.Or when tube inner chamber reached predetermined dosage outside injection enters, the cover back stitching was placed on needle stand, with hands inhour rotation needle stand, this used entry needle was unloaded, and with the entry needle that same operational approach more renews, injected operation again.
This utility model second embodiment is changed and is got by aforementioned first embodiment, and the two something in common no longer repeats to give unnecessary details; See also Fig. 9, this utility model second embodiment, mainly comprise a urceolus 10 ', a push rod 20 ', a connecting seat 30 ', a headkerchief sleeve 40 ' and a sealing ring 50 ', wherein, sealing ring 50 ' ring is restrainted in seat body portion's 36 ' periphery of this Connection Block 30 ' and is formed interference fit, can improve the reliability of stopping leak.
Aforementioned is feasible preferred embodiment of this utility model and accompanying drawing thereof, but these embodiment only illustrate, and is not to be used to limit protection domain of the present utility model.
Claims (5)
1. a retraction type safety syringe comprises a urceolus, a headkerchief sleeve, a connecting seat, a push rod and an entry needle; This urceolus is a hollow tube, its front end inner chamber and headkerchief sleeve fit, the telescopic inner chamber of this headkerchief again with this Connection Block fit mutually, make this Connection Block place outer tube inner chamber front end; This push rod device tube inner chamber outside this, but this this Connection Block of push rod drawing enters this urceolus inside together with entry needle; It is characterized in that:
This headkerchief sleeve is a body in a tubular form, is provided with double thread in the telescopic inwall of this headkerchief, by the hub flange mutually blocking of this double thread with entry needle, advances entry needle tightly to be placed on the awl cylinder of the set protrusion tubule of Connection Block according to this; The double wedge that adjoins and establish several ring-type configurations in the telescopic inwall double thread of this headkerchief end:
This Connection Block comprises protrusion tubule and the seat body portion that one constitutes, and combines with this push rod buckle with this body portion; This protrusion tubule is that an excircle is the awl column and the center is provided with hollow duct, and this protrusion tubule is to be placed in the telescopic stack shell of this headkerchief, auspiciously before this protrusion tubule engage, and this protrusion tubule rear end extends to a body portion of this Connection Block and is connected with the needle stand of entry needle; This body portion periphery ring-type sets several buckle teeth, and the double wedge of this buckle teeth of mat and headkerchief sleeve intracavity is fastened.
2, retraction type safety syringe as claimed in claim 1 is characterized in that: this headkerchief sleeve, Connection Block are to be the isolating member of three with this urceolus.
3, retraction type safety syringe as claimed in claim 1 is characterized in that: effective thread length of this double thread is equal to or less than 1/2nd of full thread length.
4, retraction type safety syringe as claimed in claim 1 is characterized in that: this headkerchief sleeve back segment adds a sealing ring, is interference fit between sealing ring and outer tube inner chamber and sealing ring and the Connection Block.
5, retraction type safety syringe as claimed in claim 4 is characterized in that: the sealing ring is the tubular body by the elastomeric material molding, and sealing ring and this headkerchief sleeve are that heat is melted to combine and formed integrated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420013798 CN2744356Y (en) | 2004-10-27 | 2004-10-27 | Retraction type safety syringe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420013798 CN2744356Y (en) | 2004-10-27 | 2004-10-27 | Retraction type safety syringe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2744356Y true CN2744356Y (en) | 2005-12-07 |
Family
ID=35579143
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420013798 Expired - Lifetime CN2744356Y (en) | 2004-10-27 | 2004-10-27 | Retraction type safety syringe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2744356Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100394991C (en) * | 2004-10-25 | 2008-06-18 | 镱钛科技股份有限公司 | Retraction type safety syringe |
-
2004
- 2004-10-27 CN CN 200420013798 patent/CN2744356Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100394991C (en) * | 2004-10-25 | 2008-06-18 | 镱钛科技股份有限公司 | Retraction type safety syringe |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: YITAI SCIENCE CO., LTD. Free format text: FORMER OWNER: LITAI TECHNOLOGY CO., LTD. Effective date: 20060512 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| C56 | Change in the name or address of the patentee |
Owner name: LITAI TECHNOLOGY CO., LTD. ZIP CODE Free format text: FORMER NAME OR ADDRESS: YITAI SCIENCE-TECHNOLOGY CO., LTD. ZIP CODE |
|
| CP01 | Change in the name or title of a patent holder |
Patentee after: Lee Tai Polytron Technologies Inc. Patentee before: INTAI TECHNOLOGY INC. |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20060512 Address after: Taiwan, China Patentee after: INTAI TECHNOLOGY Corp. Address before: Taichung City, Taiwan Province Patentee before: Lee Tai Polytron Technologies Inc. |
|
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20080618 |
|
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20080618 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |