CN105107062B - Self-destruction syringe - Google Patents
Self-destruction syringe Download PDFInfo
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- CN105107062B CN105107062B CN201510533673.8A CN201510533673A CN105107062B CN 105107062 B CN105107062 B CN 105107062B CN 201510533673 A CN201510533673 A CN 201510533673A CN 105107062 B CN105107062 B CN 105107062B
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- needle stand
- cone
- core bar
- lower needle
- self
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Abstract
It limits the invention discloses a kind of improvement needle stand itself and its with housing and designs,The self-destruction syringe that can be kept for a long time to anti-back power,It includes housing,Core bar,Piston and hub assemblies,Core bar head is the guiding conehead with the taper shaft shoulder,Hub assemblies are assembled by upper needle stand and lower needle stand,The front of upper needle stand is puncture needle interconnecting piece,The rear portion of upper needle stand is coordinated by combining the conical surface and the inner conical surface of lower needle stand front,The outer convex rib of outer cone surface rear end corresponds to limit by the inner convex rib of inner cone surface rear end on lower needle stand,The cone match section of lower needle stand is expandable structure,Limit fit structure corresponding with outer casing inner wall corresponding construction is provided in its outer circle,The inner stopper of the rear portion setting and the cooperation of the taper shaft shoulder of lower needle stand,Core bar retract to tapered shaft shoulder grafting touch inner stopper when,Interval is also maintained between the outer convex rib and inner convex rib,So as to keep the anti-back power of syringe needle point,Sliding is good when holding syringe aspiration medicinal liquid,Reduce required pulling force when shortening is unmake.
Description
Technical field
The present invention relates to a kind of syringe, it is especially a kind of needle stand is pulled back by core bar realize in housing unmake from
Ruin formula syringe.
Background technology
With the continuous popularization of safety injection, the self-destruction syringe with self-destroying function is widely used to clinic.Mesh
Before, puncture needle retraction type self-destroyed syringe due to can effective protection medical staff, prevent unexpected injury and become type self-destroyed
The mainstream of syringe.
In the Chinese invention patent that the notification number that on July 11st, 2012 is announced is CN102553036A, " two-stage separate type is pacified
Full self-destroyed syringe ", to lock conehead, connecting seat be assembled into split type needle stand, the first, second non-return knot is set on it respectively
Structure, and it is corresponding unmake structure in core bar leading portion axially spaced-apart setting first and second, the larger frictional force generated when separation
Product separating force can be efficiently controlled compared with less friction by resolving into successively two parts, smaller to need to only be used when detaching self-destruction
Power, which is pulled back, can be achieved with detaching self-destructed purpose, and medical staff is facilitated to operate；Utilize corresponding position on locking conehead and connecting seat
Two inclined-planes cooperation generate lateral expansion power effect, increase separation when frictional force, make product it is no separation unmake it
During preceding use, it is not puncture needle and retracts and lead to that injection, aspiration medicinal liquid cannot be completed or cause leakage, and structure group
Dress is convenient, is suitable for producing in batches.
But the design of the needle stand of existing two-stage separate type safe self-destruction syringe still has improved necessity.Reason exists
Between the connecting seat and housing of its needle stand be realize limit using part interference fit, once and plastic material aging deforms,
The tension of interference fit tapers into, and when carrying out injection and puncturing, anti-back power index reduces or even anti-back power cannot meet and want
It asks, the phenomenon that withdraw of the needle occurs in injection.Most products are susceptible to problems after producing 2~5 years.Therefore,
It needs that syringe construction is further improved, to keep its anti-back power.
Invention content
It limits technical problem to be solved by the invention is to provide a kind of improvement needle stand itself and its with housing and designs, to
The self-destruction syringe that anti-back power can be kept for a long time.
The technical solution adopted by the present invention to solve the technical problems is：Self-destruction syringe, including housing, core bar, work
Plug and hub assemblies are provided with preceding sealing structure between hub assemblies and housing, core bar is slidably connected with housing, on core bar
Piston is socketed with as the rear sealing structure between core bar and housing, the leading portion of core bar is provided with structure of unmaking, on hub assemblies
It is provided with the non-return structure with the respective outer side edges of unmaking of core bar, the hub assemblies are assembled by upper needle stand and lower needle stand, on
The front of needle stand is puncture needle interconnecting piece, and the rear portion of upper needle stand is the male cone (strobilus masculinus) that diameter reduces variation from front to back, male cone (strobilus masculinus)
Rear end is equipped with outer convex rib, and male cone (strobilus masculinus) and the inner conical surface of lower needle stand front coordinate, and the axial length of male cone (strobilus masculinus) is more than the axis of inner conical surface
To length, then limit corresponding with the inner convex rib of inner cone surface rear end is set on lower needle stand, lower needle stand are straight from its front end face for outer convex rib
It is cone match section to the part of its inner cone surface rear end, cone match section is expandable structure, is provided in outer circle and housing
The corresponding limit fit structure of inner wall corresponding construction, the setting non-return structure at the rear portion of lower needle stand.Upper and lower needle stand is matched
Pyramidal structure above-mentioned is used at conjunction, in injection, generated axial penetration Resistance is transferred to lower needle stand through upper needle stand, it is upper,
Knit stitch seated connection contacting surface generates outside tension, and lower needle stand leading portion designs for inflatable, under tension expansion outward, this
Sample just makes the limit fit structure in lower needle stand leading portion outer circle with outer casing inner wall be bound more closely, and resistance is retreated to increase
Power, it is seam allowance anti-back needle mode to change the anti-withdraw of the needle mode of conventional interference fit, has been preferably kept needed for self-destruction syringe
Anti-back power.
The part that the core bar is located at piston nose is the guiding conehead as structure of unmaking, and is oriented to the stage casing setting of conehead
Have the pre-small post-large taper shaft shoulder, with as non-return structure, be arranged the inner stopper of knit stitch base rear end it is corresponding limit, guide cone
The middle and back of head is equipped with the hollow groove penetrated through on its axis direction.Hollow groove design suitably weakens the strong of core bar head
Degree so that the structure of unmaking of core bar can smoothly enter into needle stand in injection process, and can be sprung back after entering needle stand
It restores, during pulling back and unmaking, the taper shaft shoulder is correspondings with inner stopper to be limited, pulling force effect of the realization to needle stand.
The height of the taper shaft shoulder is equal to the anchor ring width of the inner stopper, and the width of hollow groove is the inner stopper ring
Twice of face width.The width of hollow groove is unsuitable too small, if width is too small, core bar intensity is excessive, and core bar cannot steady implanting needle
In seat, meanwhile, the width of hollow groove is unsuitable wide, wide it cannot be guaranteed that core bar head is opened because core bar head sizes are smaller
Power, pulling force may be too small, cannot take needle stand out of, to unmake.The size recommended above can ensure that normal injection remains
Amount and reliable pull back are unmake.
The male cone (strobilus masculinus) is the combination conical surface that leading portion male cone (strobilus masculinus) is composed with back segment male cone (strobilus masculinus), the cone angle of leading portion male cone (strobilus masculinus)
More than the cone angle of back segment male cone (strobilus masculinus), back segment male cone (strobilus masculinus) and the inner conical surface of lower needle stand front coordinate, and needle stand and lower needle stand is prevented to sting
It closes too dead and influences between the two axially slide relative so that pull-back forces of unmaking are excessive without easy to operation.
The front end of the cone match section of the lower needle stand is provided with male half coupling, and is arranged in the recessed of outer casing inner wall corresponding position
Slot coordinates, and forms the limit fit structure, is provided with shoulder block corresponding with groove front position on upper needle stand, is worn in injection
Axial force is generated when thorn, shoulder block is contacted with the end face of lower needle stand, and lower needle stand is limited by outer casing inner wall, it is ensured that the not withdraw of the needle, groove
Width is more than the width of male half coupling, to form expansion accommodation space appropriate.
The anchor ring width of the inner stopper is less than spacing between the upper conical shaft shoulder of core bar and piston, unmake structure function in
When non-return structure, interval is also maintained between the outer convex rib and inner convex rib, is first realized lower needle stand from upper needle stand certain
Distance slides axially, and lower needle stand bounces back from swelling state, reduces lower frictional force between needle stand and housing, then following needle stand is drawn
Dynamic upper needle stand is conveniently operated to reduce the pulling force used that unmakes.
The outer wall of the puncture needle interconnecting piece is provided with the bulge loop being interference fitted between outer casing inner wall, before described
Sealing structure, local interference can keep sealing and assembling.
The cone match section of the lower needle stand is equipped with the distribution that is centrosymmetric extended in the axial direction backward from front end face
Three or more radial slots, simple processing, and can achieve the purpose that expand outward.
The beneficial effects of the invention are as follows：The anti-back power of syringe can be kept, propulsive force when syringe being kept to shift bottom onto, drop
Low-shrinkage needle required pulling force when unmaking.
Description of the drawings
Fig. 1 is the structural schematic diagram of self-destruction syringe of the present invention.
Fig. 2 is the partial enlarged view in the portions A in Fig. 1.
Fig. 3 is the partial enlarged view in the portions D in Fig. 1.
Fig. 4 is the front view of upper needle stand in Fig. 1.
Fig. 5 is the vertical view of Fig. 4.
Fig. 6 is the B-B sectional views of Fig. 4.
Fig. 7 is the front view of lower needle stand in Fig. 1.
Fig. 8 is the vertical view of Fig. 7.
Fig. 9 is the C-C sectional views of Fig. 8.
Figure 10 is the status diagram that structure and non-return structure pull back when contacting of unmaking.
In figure label for：Core bar 1, housing 2, piston 3, lower needle stand 4, upper needle stand 5, sheath 6, puncture needle 7 are oriented to conehead
10, hollow groove 11, the taper shaft shoulder 12, interval 13, front end necking 21, groove 22, cone match section 40, radial slot 41, male half coupling
42, inner conical surface 43, inner convex rib 44, inner stopper 45, puncture needle interconnecting piece 50, bulge loop 51, shoulder block 52, the combination conical surface 53, outer convex rib
54, tapered shaft shoulder height degree H, inner stopper anchor ring width B1, hollow well width B2.
Specific implementation mode
The following further describes the present invention with reference to the drawings.
As shown in Fig. 1~Figure 10, self-destruction syringe of the invention includes housing 2, core bar 1, piston 3 and hub assemblies,
Core bar 1 is slidably connected with housing 2, and piston 3 is arranged between core bar 1 and housing 2 and is used as rear sealing structure, hub assemblies are by upper
Needle stand 5 and lower needle stand 4 are assembled, and the front end of upper needle stand 5 is limited by the front end necking 21 of housing 2, the puncture of 5 front end of upper needle stand
Needle interconnecting piece 50 is connect with puncture needle 7, and is connected on housing 2 by sheath 6 and is covered puncture needle 7, outside puncture needle interconnecting piece 50
Wall is provided with the bulge loop 51 being interference fitted between 2 inner wall of housing, constitutes the preceding sealing structure between housing 2 and hub assemblies,
The rear portion of upper needle stand 5 is that leading portion male cone (strobilus masculinus) combines the outer of 53 rear end of the conical surface 53 and the combination conical surface with what back segment male cone (strobilus masculinus) was composed
Convex ribs 54, wherein the cone angle of leading portion male cone (strobilus masculinus) is more than the cone angle of back segment male cone (strobilus masculinus), and back segment male cone (strobilus masculinus) is interior with lower 4 front of needle stand
The conical surface 43 coordinates, and outer convex rib 54 corresponds to limit by the inner convex rib 44 of 43 rear end of inner conical surface on lower needle stand 4, and lower needle stand 4 is from its front end
Face until its 43 rear end of inner conical surface part be cone match section 40, cone match section 40 be equipped with from front end backward along axis side
To three radial slots 41 of the distribution that is centrosymmetric of extension, inflatable, contractile structure is formed, before cone match section 40
End is provided with the male half coupling 42 coordinated corresponding to the groove 22 on 2 inner wall of housing, constitutes the limit between hub assemblies and housing 2
Fit structure, the width of groove 22 are more than the width of male half coupling 42 so that lower needle stand 4 has corresponding expansion empty when expanding outward
Between, for ease of the assembly of hub assemblies and housing 2, chamfering is arranged in the front end face of lower needle stand 4, correspondingly, 22 Leading end chamfer of groove
Transition is provided with shoulder block corresponding with 22 front position of groove 52 on upper needle stand 5, it is ensured that the not withdraw of the needle, before core bar 1 is located at piston 3
The part at end is the guiding conehead 10 as structure of unmaking, and the stage casing for being oriented to conehead 10 is provided with the pre-small post-large taper shaft shoulder
12, with as non-return structure, inner stopper 45 in 4 rear end of lower needle stand is arranged corresponding limit, the middle and back for being oriented to conehead 10 is set
There are the hollow groove 11 penetrated through on its axis direction, tapered shaft shoulder height degree H=inner stopper anchor ring width B1, hollow well width
Twice of B2=inner stopper anchor ring width B1 ensures that normal injection and reliable pull back unmake, 12 groups of inner stopper 45 and the taper shaft shoulder
Synthesis core bar is pulled back position limiting structure.
By taking injection as an example, the above structure design works in this way：
Sheath 6 is removed, core bar 1 is pulled to slidably reciprocate, must not pay attention to the taper shaft shoulder 12 is allowed to enter in inner stopper 45 at this time,
It is pumped into liquid, injection needle is upward, slowly above pushes away core bar 1 and excludes air, starts to inject, and puncture needle 7 enters muscle, by resistance,
When stiction between only top needle stand 5 and housing 2 also is not enough to overcome, upper needle stand 5 moves backward, because lower needle stand 4 with it is upper
The cone match of needle stand 5 so that the cone match section 40 of lower needle stand 4 expands, and coordinating between lower needle stand 4 and housing 2 becomes more
Closely, the withdraw of the needle is prevented；Core bar 1 continues to push ahead, and during needle stand 4 under 1 front end of core bar enters, is oriented to conehead 10 and is squeezed
And flexible deformation or slight plastic deformation occurs, 12 portion retracts of the taper shaft shoulder so that 12 part of the taper shaft shoulder of core bar 1 can
The inner stopper 45 for passing through the setting of 4 rear end of lower needle stand continues into lower needle stand 4 to being pushed forward, wait for 1 head of core bar completely into
After lower needle stand 4, the hollow groove 11 on core bar 1 restores substantially to original state, continues to inject, until the rear end face of piston 3 and lower needle stand 4
Contact, propulsive force when keeping being injected into bottom, after the completion of injection, core bar 1 of pulling back, core bar 1 moves after driving lower needle stand 4, lower needle stand 4
It is retreated relative to upper needle stand 5,40 swelling state of cone match section gradually releases, between lower needle stand 4 and upper needle stand 5 and housing 2
Cooperation all becomes opposite and loosens, to reduce the required pulling force of pulling back that unmakes；The taper shaft shoulder 12 forms core bar with inner stopper 45
Restriction of pulling back matches, and the inner stopper 45 of the taper shaft shoulder 12 on core bar 1 and lower needle stand 4 interacts, and hook holds lower needle stand 4 together
It pulls back, when the taper shaft shoulder 12 is retracted and is in contact with inner stopper 45, between also being maintained between the outer convex rib 54 and inner convex rib 44
Every 13, continue to pull back, the male half coupling 42 of lower needle stand 4 is detached from groove 22 and enters the smaller part of 2 internal diameter of housing, lower 4 front end of needle stand
It further shrinks, ensures that reliably hook holds outer convex rib 54 on upper needle stand 5 to the inner convex rib 44 on lower needle stand 4, needle stand 5 in drive
It returns to together in housing 2, puncture needle 7 is made to return to home, complete self-destruction.
The above respective outer side edges are ingenious, and overall performance is excellent, while each design of part is simple, are easy to make.
Claims (8)
1. self-destruction syringe, including housing（2）, core bar（1）, piston（3）And hub assemblies, hub assemblies and housing（2）It
Between be provided with preceding sealing structure, core bar（1）With housing（2）Sliding connection, core bar（1）On be socketed with piston（3）As core
Bar（1）With housing（2）Between rear sealing structure, core bar（1）Leading portion be provided with structure of unmaking, be provided on hub assemblies with
Core bar（1）Respective outer side edges of unmaking non-return structure, the hub assemblies are by upper needle stand（5）With lower needle stand（4）It is assembled, on
Needle stand（5）Front be puncture needle interconnecting piece（50）, it is characterized in that：Upper needle stand（5）Rear portion be from front to back diameter reduce become
The rear end of the male cone (strobilus masculinus) of change, male cone (strobilus masculinus) is equipped with outer convex rib（54）, male cone (strobilus masculinus) and lower needle stand（4）The inner conical surface of front（43）Cooperation,
The axial length of male cone (strobilus masculinus) is more than inner conical surface（43）Axial length, outer convex rib（54）Then with lower needle stand（4）On be set to inner cone
Face（43）The inner convex rib of rear end（44）Corresponding limit, lower needle stand（4）From its front end face until its inner conical surface（43）The part of rear end
For cone match section（40）, cone match section（40）For expandable structure, it is provided in outer circle and housing（2）Inner wall is accordingly tied
The corresponding limit fit structure of structure, in lower needle stand（4）The rear portion setting non-return structure.
2. self-destruction syringe as described in claim 1, it is characterized in that：The core bar（1）Positioned at piston（3）The part of front end
For the guiding conehead as structure of unmaking（10）, it is oriented to conehead（10）Stage casing be provided with the pre-small post-large taper shaft shoulder（12）,
With as non-return structure, be arranged in lower needle stand（4）The inner stopper of rear end（45）Corresponding limit, is oriented to conehead（10）Middle and back
Equipped with the hollow groove penetrated through on its axis direction（11）.
3. self-destruction syringe as claimed in claim 2, it is characterized in that：The taper shaft shoulder（12）Height（H）Equal to institute
State inner stopper（45）Anchor ring width（B1）, hollow groove（11）Width（B2）For the inner stopper（45）Anchor ring width（B1）Two
Times.
4. self-destruction syringe as described in claim 1, it is characterized in that：The male cone (strobilus masculinus) is leading portion male cone (strobilus masculinus) and back segment outer cone
The combination conical surface that face is composed（53）, the cone angle of leading portion male cone (strobilus masculinus) is more than the cone angle of back segment male cone (strobilus masculinus), and back segment male cone (strobilus masculinus) is under
Needle stand（4）The inner conical surface of front（43）Cooperation.
5. the self-destruction syringe as described in claim 1,2,3 or 4, it is characterized in that：The lower needle stand（4）Cone match section
（40）Front end be provided with male half coupling（42）, with setting in housing（2）The groove of inner wall corresponding position（22）Coordinate, described in formation
Limit fit structure, upper needle stand（5）On be provided with and groove（22）The corresponding shoulder block of front position（52）, groove（22）Width
Degree is more than male half coupling（42）Width.
6. self-destruction syringe as claimed in claim 2 or claim 3, it is characterized in that：The inner stopper（45）Anchor ring width（B1）
Less than core bar（1）The upper conical shaft shoulder（12）With piston（3）Between spacing（B2）, structure function is unmake when non-return structure, institute
State outer convex rib（54）With inner convex rib（44）Between also maintain interval（13）.
7. the self-destruction syringe as described in claim 1,2,3 or 4, it is characterized in that：The puncture needle interconnecting piece（50）It is outer
Wall is provided with and housing（2）The bulge loop being interference fitted between inner wall（51）, as the preceding sealing structure.
8. the self-destruction syringe as described in claim 1,2,3 or 4, it is characterized in that：The lower needle stand（4）Cone match section
（40）Three or more the radial slots equipped with the distribution that is centrosymmetric extended in the axial direction backward from front end face（41）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510533673.8A CN105107062B (en) | 2015-08-27 | 2015-08-27 | Self-destruction syringe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510533673.8A CN105107062B (en) | 2015-08-27 | 2015-08-27 | Self-destruction syringe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105107062A CN105107062A (en) | 2015-12-02 |
| CN105107062B true CN105107062B (en) | 2018-09-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510533673.8A Active CN105107062B (en) | 2015-08-27 | 2015-08-27 | Self-destruction syringe |
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| CN (1) | CN105107062B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105771036A (en) * | 2016-03-29 | 2016-07-20 | 陆盘中 | Disposable locking safety auto-disable syringe |
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|---|---|---|---|---|
| CN2845821Y (en) * | 2005-11-18 | 2006-12-13 | 林作钱 | Safety self destroying medical syringe |
| CN2863143Y (en) * | 2005-12-07 | 2007-01-31 | 林作钱 | Safe self-destruction syringe |
| CN102327658A (en) * | 2011-10-20 | 2012-01-25 | 柏保东 | Easily-assembled high-safety self-destruction injector |
| CN102553036A (en) * | 2012-01-19 | 2012-07-11 | 陆盘中 | Two-stage separate type safe self-destruction syringe |
| CN202387067U (en) * | 2011-12-15 | 2012-08-22 | 江西三鑫医疗科技股份有限公司 | Novel retraction self-destruction type syringe |
| CN203749949U (en) * | 2014-01-23 | 2014-08-06 | 陆盘中 | Self-destructive disposable syringe |
| CN205041906U (en) * | 2015-08-27 | 2016-02-24 | 陆盘中 | Auto -disable syringe |
-
2015
- 2015-08-27 CN CN201510533673.8A patent/CN105107062B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2845821Y (en) * | 2005-11-18 | 2006-12-13 | 林作钱 | Safety self destroying medical syringe |
| CN2863143Y (en) * | 2005-12-07 | 2007-01-31 | 林作钱 | Safe self-destruction syringe |
| CN102327658A (en) * | 2011-10-20 | 2012-01-25 | 柏保东 | Easily-assembled high-safety self-destruction injector |
| CN202387067U (en) * | 2011-12-15 | 2012-08-22 | 江西三鑫医疗科技股份有限公司 | Novel retraction self-destruction type syringe |
| CN102553036A (en) * | 2012-01-19 | 2012-07-11 | 陆盘中 | Two-stage separate type safe self-destruction syringe |
| CN203749949U (en) * | 2014-01-23 | 2014-08-06 | 陆盘中 | Self-destructive disposable syringe |
| CN205041906U (en) * | 2015-08-27 | 2016-02-24 | 陆盘中 | Auto -disable syringe |
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| Publication number | Publication date |
|---|---|
| CN105107062A (en) | 2015-12-02 |
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