CN103446643B - A kind of core rod locking-type safety syringe - Google Patents

A kind of core rod locking-type safety syringe Download PDF

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Publication number
CN103446643B
CN103446643B CN201210304606.5A CN201210304606A CN103446643B CN 103446643 B CN103446643 B CN 103446643B CN 201210304606 A CN201210304606 A CN 201210304606A CN 103446643 B CN103446643 B CN 103446643B
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China
Prior art keywords
core bar
locking piece
annular
place
locking
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Expired - Fee Related
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CN201210304606.5A
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Chinese (zh)
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CN103446643A (en
Inventor
冯兴元
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Changzhou Kangfulai Medical Supplies Co., Ltd.
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JIANGSU YILE MEDICIAL ARTICLE CO Ltd
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Priority to CN201210304606.5A priority Critical patent/CN103446643B/en
Publication of CN103446643A publication Critical patent/CN103446643A/en
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Publication of CN103446643B publication Critical patent/CN103446643B/en
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Abstract

The invention discloses a kind of core rod locking-type safety syringe, needle stand is provided with in the cylinder neck of cylindrical shell upper end, core bar is provided with in cylindrical shell, core bar is socketed with plug near upper end, needle stand upper end is provided with needle tubing, it is characterized in that: inner chamber place, described needle stand lower end is provided with holding section, and core bar end forms the locking matched with holding section and to pull back portion, cylindrical shell is provided with core bar locking piece near the inner chamber place of bottom, core bar place be provided with cooperatively interact with core bar locking piece from locking plate.Technical essential of the present invention is, a built-in core bar locking piece at injector cartridge lower ending opening place, this core bar locking piece can realize being engaged with the firm of core bar, simultaneously, can realize being engaged with the firm of cylinder inboard wall, effectively prevent core bar from again front being pushed away or post-tensioning in the secure state, thus avoid the needle section of core bar end to cause unexpected injury to personnel, product design is rational in infrastructure, be skillfully constructed, core bar locking piece after improvement can realize rear portion and automatically assemble, guarantee the requirement that automatization produces in enormous quantities, be easy to the safety injector and the safety self-destructing syringe that promote the use of all size.

Description

A kind of core rod locking-type safety syringe
Technical field
The present invention relates to the technical field of medical apparatus and instruments, specifically a kind of safety injector with core bar locking mechanism, particularly its frame for movement.
Background technology
Documents, the patent No.: ZL201110066497.3, the applying date: 2011.03.12, patentee: Xu Haohua, this case discloses " a kind of syringe needle interchangeable and can automatic retracted only can expendable safety injector ", comprise overcoat and core bar, described core bar is inserted therein chamber from overcoat big opening end, also comprise needle for dispensing medicine and injection needle, described core bar is a core structure, core bar inner chamber is provided with snap ring, one resilience bar alive is set in the masthead open pore of core bar, Compress Spring ring set is lived on bar in resilience, Compress Spring one end is resisted against resilience bar alive bar plane alive, the other end is resisted against on the bundle pitch plane of core bar.Described resilience bar alive exposes core bar top portion and is provided with elastic buckles locking device, and the middle part of resilience bar alive is provided with card joint, and during assembling, the snap ring that the card joint in the middle part of resilience bar alive crosses the setting of core bar inner chamber is fixed, and Compress Spring ring set is shielded by pressure on resilience bar alive.
Be not difficult to find out from above-mentioned documents, existing safety injector, after injection completes, can realize needle retractable in cylindrical shell, realize the safety operation of syringe, avoid unexpected injury.
Existing safety injector some core bar locking mechanism is not set, after syringe completes, core bar still again can be pushed forward in cylindrical shell or pull out from cylinder back-end, cause unexpected injury, although considered the necessity of core bar locking mechanism when separately having some safety injectors to design, there is unreasonable part in its project organization, though the secure lock of core bar can be realized, but rear portion automatic assembling cannot be realized, directly cause automatization going into operation in enormous quantities, waste a large amount of manpower and fund.
Summary of the invention
The object of the present invention is to provide a kind of core rod locking-type safety syringe, its in cylindrical shell lower end near the built-in core bar locking piece of opening part, this core bar locking piece can with the coordinating from locking plate of core bar place, realize the locking of core bar, prevent core bar from skidding off cylindrical shell lower end or needle tubing is pushed out cylindrical shell upper end again, overcome the shortcoming and defect existed in prior art.
To achieve these goals, technical scheme of the present invention is: a kind of core rod locking-type safety syringe, it comprises cylindrical shell, needle stand is provided with in the cylinder neck of cylindrical shell upper end, core bar is provided with in cylindrical shell, core bar is socketed with plug near upper end, needle stand upper end is provided with needle tubing, it is characterized in that: inner chamber place, described needle stand lower end is provided with holding section, core bar end forms the locking matched with holding section and to pull back portion, cylindrical shell is provided with core bar locking piece near the inner chamber place of bottom, core bar place be provided with cooperatively interact with core bar locking piece from locking plate.
The invention discloses a kind of core rod locking-type safety syringe, it is after syringe completes, and can realize being engaged of core bar end and needle stand, and pull back needle stand into syringe cylinder intracoelomic cavity, realize safety operation.Technical essential of the present invention is, a built-in core bar locking piece at injector cartridge lower ending opening place, this core bar locking piece can realize being engaged with the firm of core bar, simultaneously, can realize being engaged with the firm of cylinder inboard wall, effectively prevent core bar from again front being pushed away or post-tensioning in the secure state, thus avoid the needle section of core bar end to cause unexpected injury to personnel, product design is rational in infrastructure, be skillfully constructed, core bar locking piece after improvement can realize rear portion and automatically assemble, guarantee the requirement that automatization produces in enormous quantities, be easy to the safety injector and the safety self-destructing syringe that promote the use of all size.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is the present invention using state figure when injecting.
Fig. 3 is the partial enlarged drawing of Fig. 2.
Fig. 4 is syringe of the present invention using state figure when completing.
Fig. 5 is core bar of the present invention using state figure when being engaged with core bar locking piece.
Fig. 6 is the partial enlarged drawing of Fig. 5.
State diagram when Fig. 7 is safety self-destruct of the present invention.
Fig. 8 is that the first state diagram is assembled at rear portion of the present invention.
Fig. 9 is the partial enlarged drawing of Fig. 8.
Figure 10 is that the second state diagram is assembled at rear portion of the present invention.
Figure 11 is the partial enlarged drawing of Figure 10.
Figure 12 is rear portion of the present invention assembling third state figure.
Figure 13 is the partial enlarged drawing of Figure 12.
Figure 14 is tube structure schematic diagram of the present invention.
Figure 15 is core bar structure schematic diagram of the present invention.
Figure 16 is core bar locking piece structural representation of the present invention.
Figure 17 is core bar locking piece first axonometric chart of the present invention.
Figure 18 is core bar locking piece second axonometric chart of the present invention.
Figure 19 is core bar locking piece the 3rd axonometric chart of the present invention.
Figure 20 is core bar locking piece the 4th axonometric chart of the present invention.
Detailed description of the invention
With reference to the accompanying drawings, the present invention is described further.
The present invention is a kind of core rod locking-type safety syringe, as shown in fig. 1, it comprises cylindrical shell 1, needle stand 3 is provided with in the cylinder neck 2 of cylindrical shell 1 upper end, core bar 4 is provided with in cylindrical shell 1, core bar 4 is socketed with plug 5 near upper end, needle stand 3 upper end is provided with needle tubing 6, it is different from prior art and is: inner chamber place, described needle stand 3 lower end is provided with holding section 9, core bar 4 end forms the locking matched with holding section and to pull back portion 10, cylindrical shell 1 is provided with core bar locking piece 7 near the inner chamber place of bottom, core bar 4 place be provided with cooperatively interact with core bar locking piece 7 from locking plate 8.
In the specific implementation, as shown in Figure 15, the described locking portion 10 that pulls back is a cylinder, and this cylindrical end forms frustum of a cone 11, and the cylindrical outer place of the frustum of a cone 11 bottom forms annular reverse step 12.Above-mentioned holding section 9 place is provided with annular hook step 13, annular hook step 13 can cooperatively interact with above-mentioned annular reverse step 12, when pulling core bar, mutual occlusion, the interior diameter of annular hook step 13 is less than the overall diameter of the frustum of a cone 11 lower limb, the frustum of a cone 11 can be fastened in annular hook step 13, realizes needle stand 3 and is engaged with the mutual of core bar 4.
In the specific implementation, described core bar locking piece 7 is cylindrical, core bar locking piece 7 bottom outer edge place forms locking piece annular stop bulge loop 14, the core bar locking piece 7 outside place on locking piece annular stop bulge loop 14 top forms locking piece annular stop convex tendon 15, core bar locking piece 7 place of locking piece annular stop convex tendon 15 upper and lower forms upper ring section 16 and lower ring portion 17 respectively, core bar locking piece 7 place on upper ring section 16 top forms annular chamfer portion 18, core bar locking piece 7 place on top, annular chamfer portion 18 forms annular core bar occlusion ring 19, annular core bar occlusion ring 19 place forms the longitudinal breach 20 of 1-10 bar, in annular core bar occlusion ring 19, cavity wall place forms the annular self-locking grooves 21 matched with from locking plate 8, core bar locking piece 7 is longitudinally provided with gap 22, in the annular core bar occlusion ring 19 on annular self-locking grooves 21 top, cavity wall place forms annular guiding surface 23, the internal diameter at core bar locking piece 7 lower ending opening place is greater than the core bar locking piece 7 inner chamber place internal diameter of annular self-locking grooves 21 bottom, annular self-locking grooves 21 place groove-root diameter is greater than core bar locking piece 7 inner chamber place, annular self-locking grooves 21 top and the bottom internal diameter, core bar locking piece 7 upper end open place internal diameter is greater than self-locking grooves 21 upper core lever lock locking member 7 inner chamber place internal diameter, core bar locking piece 7 upper end open place internal diameter is less than core bar locking piece 7 lower ending opening place internal diameter, locking piece annular stop bulge loop 14 external diameter is greater than core bar locking piece 7 upper end external diameter, locking piece annular stop bulge loop 14 external diameter is greater than lower ring portion 17 external diameter 1mm-20mm, locking piece annular stop bulge loop 14 external diameter is 3mm-58mm, length between core bar locking piece 7 top and bottom is 3mm-50mm.
In the specific implementation, the angle between described annular self-locking grooves 21 cell wall and bottom land is right angle.
In the specific implementation, describedly all forming square edge from locking plate about 8 outer edge, is 2mm-60mm from the external diameter of locking plate 8, from locking plate for circular and match with annular self-locking grooves 21.
In the specific implementation, in described cylindrical shell 1 lower ending opening, cavity wall place is provided with inverse toroidal step 24, in the cylindrical shell 1 on inverse toroidal step 24 top, cavity wall place forms the locking piece annular groove 25 matched with locking piece annular stop convex tendon 15, in the cylindrical shell 1 on locking piece annular groove 25 top, cavity wall place forms the cylindrical shell annular stop convex tendon 26 matched with annular chamfer portion 18, in the cylindrical shell 1 on cylindrical shell annular stop convex tendon 26 top, cavity wall place forms cylindrical shell annular reverse step 27, the internal diameter at the cylinder lumen inwall place between cylindrical shell annular stop convex tendon 26 and cylindrical shell annular reverse step 27 is greater than 3mm and is less than 60mm, cylinder lumen inwall place internal diameter between cylindrical shell annular stop convex tendon 26 and cylindrical shell annular reverse step 27 is less than the cylinder lumen inwall place internal diameter between cylindrical shell annular stop convex tendon 26 and locking piece annular groove 25.
In the specific implementation, in the cylindrical shell 1 on described locking piece annular groove 25 top, cavity wall place forms cylindrical shell annular stop groove.
In the specific implementation, the spacing on top, gap 22 is less than the spacing of bottom, in up-narrow and down-wide shape.
In actual use, as as shown in Fig. 2-Fig. 7, when having injected, the locking of the core bar 4 end portion 10 that pulls back is fastened in the holding section 9 at needle stand 3 inner chamber place, pull back core bar, needle stand 3 is drawn in cylinder lumen in cylinder neck, continue to pull back core bar, now, core bar after locking plate 8 skims over the annular guiding surface 23 of core bar locking piece 7, slip in the annular self-locking grooves 21 of core bar locking piece 7 from locking plate 8, due to both sides cell wall and the rectangular shape of bottom land of annular self-locking grooves 21, therefore from locking plate 8 by firmly stuck in cell body, so, core bar is fixed, can not driven forward core bar, core bar can not be pulled back again, now, along the vee bending body of rod at core bar body of rod place, core bar fractures the most at last, realize the safety operation of syringe.
As as shown in Fig. 8-Figure 13, for this syringe each parts rear portion assembling schematic diagram, cylindrical shell lower end inner chamber is assembled to by the front end of core bar locking piece 7, then core bar end is pushed from core bar locking piece 7 center, because core bar locking piece 7 is longitudinally provided with gap 22, whole core bar locking piece 7 is run through in this gap from top to bottom, therefore core bar locking piece 7 is not when by External Force Acting, the diameter at center can allow core bar pass through completely, after core bar is seated, core bar locking piece 7 end is inwardly headed into, after gap 22 diminishes, core bar locking piece 7 puts in place by being assembled after contracted diameter, now, locking piece annular stop convex tendon 15 just snaps in the locking piece annular groove 25 of cylindrical shell, the top of core bar locking piece 7 just props up the cylindrical shell annular reverse step 27 in cylindrical shell, annular chamfer portion 18 just props up cylindrical shell annular stop convex tendon 26, locking piece annular stop bulge loop 14 just props up the inverse toroidal step 24 at cylindrical shell place, said structure is passed through between core bar locking piece 7 and cylindrical shell 1, realize firmly fastening state, comprehensive foregoing description, the art of this patent can realize full-automatic rear portion assembling procedure, overcome the shortcoming existed in prior art.
Above content is in conjunction with concrete preferred implementation further description made for the present invention, can not assert that the present invention specifically implements to be confined to these explanations above-mentioned.For general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, some simple deduction or replace can also be made, all should be considered as belonging to protection scope of the present invention.

Claims (5)

1. a core rod locking-type safety syringe, it comprises cylindrical shell (1), needle stand (3) is provided with in the cylinder neck (2) of cylindrical shell (1) upper end, core bar (4) is provided with in cylindrical shell (1), core bar (4) is socketed with plug (5) near upper end, needle stand (3) upper end is provided with needle tubing (6), it is characterized in that: inner chamber place, described needle stand (3) lower end is provided with holding section (9), core bar (4) end forms the locking matched with holding section and to pull back portion (10), cylindrical shell (1) is provided with core bar locking piece (7) near the inner chamber place of bottom, core bar (4) place be provided with cooperatively interact with core bar locking piece (7) from locking plate (8), the described locking portion (10) that pulls back is a cylinder, this cylindrical end forms the frustum of a cone (11), the cylindrical outer place of the frustum of a cone (11) bottom forms annular reverse step (12), described holding section (9) place is provided with annular hook step (13), the interior diameter of annular hook step (13) is less than the overall diameter of the frustum of a cone (11) lower limb, described core bar locking piece (7) is cylindrical, core bar locking piece (7) bottom outer edge place forms locking piece annular stop bulge loop (14), core bar locking piece (7) the outside place on locking piece annular stop bulge loop (14) top forms locking piece annular stop convex tendon (15), core bar locking piece (7) place of locking piece annular stop convex tendon (15) upper and lower forms upper ring section (16) and lower ring portion (17) respectively, core bar locking piece (7) place on upper ring section (16) top forms annular chamfer portion (18), core bar locking piece (7) place on annular chamfer portion (18) top forms annular core bar occlusion ring (19), annular core bar occlusion ring (19) place forms the longitudinal breach (20) of 1-10 bar, annular core bar occlusion ring (19) interior cavity wall place forms the annular self-locking grooves (21) matched with from locking plate (8), core bar locking piece (7) is longitudinally provided with gap (22), annular core bar occlusion ring (19) the interior cavity wall place on annular self-locking grooves (21) top forms annular guiding surface (23), the internal diameter at core bar locking piece (7) lower ending opening place is greater than core bar locking piece (7) the inner chamber place internal diameter of annular self-locking grooves (21) bottom, annular self-locking grooves (21) place groove-root diameter is greater than core bar locking piece (7) inner chamber place, annular self-locking grooves (21) top and the bottom internal diameter, core bar locking piece (7) upper end open place internal diameter is greater than self-locking grooves (21) upper core lever lock locking member (7) inner chamber place internal diameter, core bar locking piece (7) upper end open place internal diameter is less than core bar locking piece (7) lower ending opening place internal diameter, locking piece annular stop bulge loop (14) external diameter is greater than core bar locking piece (7) upper end external diameter, locking piece annular stop bulge loop (14) external diameter is greater than lower ring portion (17) external diameter 1mm-20mm, locking piece annular stop bulge loop (14) external diameter is 3mm-58mm, length between core bar locking piece (7) top and bottom is 3mm-50mm.
2. a kind of core rod locking-type safety syringe according to claim 1, is characterized in that: the angle of described annular self-locking grooves (21) between cell wall and bottom land is right angle.
3. a kind of core rod locking-type safety syringe according to claim 1, it is characterized in that: described from locking plate (8) up and down outer edge all form square edge, be 2mm-60mm from the external diameter of locking plate (8), from locking plate for circular and match with annular self-locking grooves (21).
4. a kind of core rod locking-type safety syringe according to claim 1, it is characterized in that: in described cylindrical shell (1) lower ending opening, cavity wall place is provided with inverse toroidal step (24), the interior cavity wall place of cylindrical shell (1) on inverse toroidal step (24) top forms the locking piece annular groove (25) matched with locking piece annular stop convex tendon (15), the interior cavity wall place of cylindrical shell (1) on locking piece annular groove (25) top forms the cylindrical shell annular stop convex tendon (26) matched with annular chamfer portion (18), the interior cavity wall place of cylindrical shell (1) on cylindrical shell annular stop convex tendon (26) top forms cylindrical shell annular reverse step (27), the internal diameter at the cylinder lumen inwall place between cylindrical shell annular stop convex tendon (26) and cylindrical shell annular reverse step (27) is greater than 3mm and is less than 60mm, cylinder lumen inwall place internal diameter between cylindrical shell annular stop convex tendon (26) and cylindrical shell annular reverse step (27) is less than the cylinder lumen inwall place internal diameter between cylindrical shell annular stop convex tendon (26) and locking piece annular groove (25).
5. a kind of core rod locking-type safety syringe according to claim 4, is characterized in that: the interior cavity wall place of cylindrical shell (1) on described locking piece annular groove (25) top forms cylindrical shell annular stop groove.
CN201210304606.5A 2012-08-24 2012-08-24 A kind of core rod locking-type safety syringe Expired - Fee Related CN103446643B (en)

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Application Number Priority Date Filing Date Title
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CN103446643B true CN103446643B (en) 2015-12-09

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106362246A (en) * 2016-09-23 2017-02-01 东莞市联洲知识产权运营管理有限公司 Disposable safety syringe

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101850141A (en) * 2009-04-01 2010-10-06 江苏亿乐医疗用品有限公司 Safe injector
CN102526845A (en) * 2010-12-13 2012-07-04 江苏亿乐医疗用品有限公司 Safety self-destruction injector
CN102553026A (en) * 2010-12-13 2012-07-11 江苏亿乐医疗用品有限公司 Core locking structure
CN202822365U (en) * 2012-08-24 2013-03-27 江苏亿乐医疗用品有限公司 Core rod locking type safe syringe

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101850141A (en) * 2009-04-01 2010-10-06 江苏亿乐医疗用品有限公司 Safe injector
CN102526845A (en) * 2010-12-13 2012-07-04 江苏亿乐医疗用品有限公司 Safety self-destruction injector
CN102553026A (en) * 2010-12-13 2012-07-11 江苏亿乐医疗用品有限公司 Core locking structure
CN202822365U (en) * 2012-08-24 2013-03-27 江苏亿乐医疗用品有限公司 Core rod locking type safe syringe

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Effective date of registration: 20190611

Address after: 213111 Baiyangqiao 66, Huangtiandang Village Committee, Zhenglu Town, Tianning District, Changzhou City, Jiangsu Province

Patentee after: Changzhou Kangfulai Medical Supplies Co., Ltd.

Address before: 213115 Sanhekou Industrial Development Zone, Changzhou City, Jiangsu Province

Patentee before: Jiangsu Yile Medicial Article Co., Ltd.

CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20151209

Termination date: 20200824