CN202822350U - Core rod locking piece - Google Patents
Core rod locking piece Download PDFInfo
- Publication number
- CN202822350U CN202822350U CN 201220423949 CN201220423949U CN202822350U CN 202822350 U CN202822350 U CN 202822350U CN 201220423949 CN201220423949 CN 201220423949 CN 201220423949 U CN201220423949 U CN 201220423949U CN 202822350 U CN202822350 U CN 202822350U
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- CN
- China
- Prior art keywords
- locking piece
- annular
- core rod
- core bar
- piece body
- 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.)
- Withdrawn - After Issue
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- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The utility model discloses a core rod locking piece. The core rod locking piece comprises a locking piece body. The locking piece body is lengthways provided with a gap. An annular guiding slope is formed on the inner wall of an inner cavity of an annular core rod clenching ring which is arranged on the upper portion of an annular self-locking groove. After a syringe is finished, the clench of the end portion of the core rod and a needle base can be achieved through the locking piece body, the needle base can be pulled back to the inner cavity of a syringe cylinder body, and the safe operation is achieved. The technological key points of the core rod locking piece include that the opening place of the lower end of the syringe cylinder body is provided with a core rod locking piece, the core rod locking piece can achieve the fixed clench with a core rod, and meanwhile achieve the fixed clench of the core rod locking piece with the inner wall of the cylinder body, effectively prevent the core rod from being pushed forward or pulled backward again in the safe state and therefore prevents the needle head portion of the end portion of the core rod from bringing accidental injuries to the staff. The core rod locking piece is reasonable in design and structure and ingenious in conception. The improved core rod locking piece can achieve the full-automatic assembling of the back portion of the core rod locking piece, meet the requirement of automatic mass production and is easy to apply to all standards of safe syringes and safe auto-disable syringe.
Description
Technical field
This utility model relates to the technical field of medical apparatus and instruments, specifically a kind of locking mechanism for safety injector, particularly its frame for movement.
Background technology
Documents, the patent No.: ZL201110066497.3, the applying date: 2011.03.12, patentee: Xu Haohua, this case disclose " but a kind of syringe needle is interchangeable and automatic retracted only can expendable safety injector ", comprise overcoat and core bar, described core bar inserts its inner chamber from the overcoat big opening end, also comprise needle for dispensing medicine and injection needle, described core bar is a core structure, and the core bar inner chamber is provided with snap ring, one resilience bar alive is set in the masthead open pore of core bar, the Compress Spring ring set is on bar is lived in resilience, and Compress Spring one end is resisted against resilience bar alive bar alive plane, and the other end is resisted against on the bundle pitch plane of core bar.Described resilience bar alive exposes the core bar masthead and partly is provided with the elastic buckles locking device, and the middle part of resilience bar alive is provided with the card joint, and during assembling, the card in the middle part of the resilience bar alive saves the snap ring of crossing the setting of core bar inner chamber and fixed, and the 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 can be realized needle retractable to cylindrical shell after injection is finished, realize the safety operation of syringe, avoids unexpected injury.
Some does not arrange the core bar locking mechanism existing safety injector, after syringe is finished, core bar still can again be pushed ahead in the cylindrical shell or from cylinder back-end and be pulled out, cause unexpected injury, although considered the necessity of core bar locking mechanism when other has some safety injector designs, there is unreasonable part in its project organization, though can realize the secure lock of core bar, but can't realize the rear portion automatic assembling, directly cause in enormous quantities automatization's operation, waste a large amount of manpowers and fund.
Summary of the invention
The purpose of this utility model is to provide a kind of core bar locking piece, it is the close built-in core bar locking piece of opening part in the cylindrical shell lower end, this core bar locking piece can with the cooperating from locking plate of core bar place, realize the locking of core bar, prevent that core bar from skidding off the cylindrical shell lower end or needle tubing is pushed out the cylindrical shell upper end again, overcome the shortcoming and defect that exists in the prior art.
To achieve these goals, the technical solution of the utility model is: a kind of core bar locking piece, it comprises the locking piece body, it is characterized in that: described locking piece body is cylindrical, locking piece body bottom outer edge place forms locking piece annular stop bulge loop, the locking piece body exterior place on locking piece annular stop bulge loop top forms locking piece annular stop convex tendon, the locking piece body place of locking piece annular stop convex tendon upper and lower forms respectively ring portion and lower ring portion, the locking piece body place on upper ring portion top forms the ring-type inclined plane part, the locking piece body place on ring-type inclined plane part top forms annular core bar interlock ring, annular core bar interlock ring place forms the vertical breach of 1-10 bar, the cavity wall place forms annular self-locking grooves in the annular core bar interlock ring, the locking piece body vertically is provided with the gap, and the cavity wall place forms annular guiding surface in the annular core bar interlock ring on annular self-locking grooves top.
The utility model discloses a kind of core bar locking piece, it can realize the interlock of core bar end and needle stand after syringe is finished, and needle stand is pulled back into the syringe cylinder intracoelomic cavity, realizes safety operation.Technical essential of the present utility model is, the built-in core bar locking piece at injector cartridge lower ending opening place, this core bar locking piece can be realized the firm interlock with core bar, simultaneously, can realize the firm interlock with cylinder inboard wall, prevent that effectively core bar from front being pushed away or post-tensioning again under safe condition, thereby avoid the needle section of core bar end that personnel are caused unexpected injury, product design is rational in infrastructure, be skillfully constructed, core bar locking piece after the improvement can realize that the rear portion automatically assembles, and guarantees the requirement that automatization produces in enormous quantities, is easy to promote the use of safety injector and the safety self-destructing syringe of all size.
Description of drawings
Fig. 1 is this utility model structural representation.
Fig. 2 is this utility model core bar locking piece the first axonometric chart.
Fig. 3 is this utility model core bar locking piece the second axonometric chart.
Fig. 4 is this utility model core bar locking piece the 3rd axonometric chart.
Fig. 5 is this utility model core bar locking piece the 4th axonometric chart.
Fig. 6 is this syringe core rod structure schematic diagram.
Fig. 7 is this syringe barrel structure schematic diagram.
Fig. 8 is syringe the first user mode figure.
Fig. 9 is syringe the second user mode figure.
Figure 10 is syringe the 3rd user mode figure.
Figure 11 is syringe the 4th user mode figure.
Figure 12 is locking piece body the first assembly state diagram.
Figure 13 is the partial enlarged drawing of Figure 12.
Figure 14 is locking piece body the second assembly state diagram.
Figure 15 is the partial enlarged drawing of Figure 14.
Figure 16 is locking piece body the 3rd assembly state diagram.
Figure 17 is the partial enlarged drawing of Figure 16.
Figure 18 is locking piece body the 4th assembly state diagram.
The specific embodiment
With reference to the accompanying drawings, this utility model further is described.
This utility model is a kind of core bar locking piece, as shown in fig. 1, it comprises locking piece body 1, it is characterized in that: described locking piece body 1 is cylindrical, locking piece body 1 bottom outer edge place forms locking piece annular stop bulge loop 2, the locking piece body 1 outside place on locking piece annular stop bulge loop 2 tops forms locking piece annular stop convex tendon 3, locking piece body 1 place of locking piece annular stop convex tendon 3 upper and lowers forms respectively ring portion 4 and lower ring portion 5, locking piece body 1 place on upper ring portion 4 tops forms ring-type inclined plane part 6, locking piece body 1 place on ring-type inclined plane part 6 tops forms annular core bar interlock ring 7, annular core bar interlock ring 7 places form the vertical breach 8 of 1-10 bar, annular core bar interlock ring 7 interior cavity wall places form annular self-locking grooves 9, locking piece body 1 vertically is provided with gap 10, and the annular core bar interlock ring 7 interior cavity wall places on annular self-locking grooves 9 tops form annular guiding surface 11.
In the specific implementation, the internal diameter at described locking piece body 1 lower ending opening place is greater than the locking piece body 1 inner chamber place internal diameter of annular self-locking grooves 9 bottoms, annular self-locking grooves 9 place's groove-root diameters are greater than annular self-locking grooves 9 top and the bottom locking piece bodies 1 inner chamber place internal diameter, locking piece body 1 upper end open place internal diameter is greater than annular self-locking grooves 9 top locking piece bodies 1 inner chamber place internal diameter, locking piece body 1 upper end open place internal diameter is less than locking piece body 1 lower ending opening place internal diameter, and locking piece annular stop bulge loop 2 external diameters are greater than core bar locking piece 7 upper end external diameters.
In the specific implementation, described locking piece annular stop bulge loop 2 external diameters are greater than lower ring portion 5 external diameter 1mm-20mm, and locking piece annular stop bulge loop 2 external diameters are 3mm-58mm.
In the specific implementation, the length between described locking piece body 1 top and bottom is 3mm-50mm.
In the specific implementation, the angle between described annular self-locking grooves 9 cell walls and the bottom land is the right angle.
In the specific implementation, the spacing on 10 tops, described gap is up-narrow and down-wide shape less than the spacing of bottom.
In the specific implementation, the syringe core rod place is provided with from locking plate 12, described from locking plate up and down outer edge all form square edge, external diameter from locking plate 12 is 2mm-60mm, match for circle and with above-mentioned annular self-locking grooves 9 from locking plate, in locking plate 12 is fastened on annular self-locking grooves 9, realize the core bar locking.
In the specific implementation, the cavity wall place is provided with inverse toroidal step 14 in described cylindrical shell 13 lower ending openings, the cylindrical shell 13 interior cavity wall places on inverse toroidal step 14 tops form the locking piece annular groove 15 that matches with locking piece annular stop convex tendon 3, the cylindrical shell 13 interior cavity wall places on locking piece annular groove 15 tops form the cylindrical shell annular stop convex tendon 16 that matches with ring-type inclined plane part 6, the cylindrical shell 13 interior cavity wall places on cylindrical shell annular stop convex tendon 16 tops form cylindrical shell annular reverse step 17, less than 60mm, the cylinder lumen inwall place internal diameter between cylindrical shell annular stop convex tendon 16 and the cylindrical shell annular reverse step 17 is less than the cylinder lumen inwall place internal diameter between cylindrical shell annular stop convex tendon 16 and the locking piece annular groove 15 greater than 3mm for the internal diameter at the cylinder lumen inwall place between cylindrical shell annular stop convex tendon 16 and the cylindrical shell annular reverse step 17.
In actual use, as shown in Fig. 8-Figure 11, when injection is finished, the locking of the core bar 18 ends section 19 that pulls back is fastened in the holding section 21 at needle stand 20 inner chamber places, pull back core bar, needle stand 20 is drawn in cylinder lumen in the cylinder neck, continue to pull back core bar, at this moment, core bar after locking plate skims over the annular guiding surface of core bar locking piece, in locking plate slips into the annular self-locking grooves of core bar locking piece because both sides cell wall and the rectangular shape of bottom land of annular self-locking grooves, therefore from locking plate by firmly stuck in cell body, so, core bar is fixed, can not promote forward core bar, can not pull back core bar again, at this moment, along the vee bending body of rod at core bar body of rod place, core bar fractures the most at last, realizes the safety operation of syringe.
As shown in Figure 12-Figure 18, be each parts rear portion assembling schematic diagram of this syringe, be assembled to cylindrical shell lower end inner chamber to the front end with locking piece body 1, then the core bar end is pushed from locking piece body 1 center, because locking piece body 1 vertically is provided with the gap, whole locking piece body is run through in this gap from top to bottom, therefore the locking piece body is not when being subjected to External Force Acting, the diameter at center can allow core bar pass through fully, after core bar is seated, core locking piece body tip is inwardly headed into, after the gap smaller, the locking piece body is assembled after by contracted diameter and puts in place, at this moment, locking piece annular stop convex tendon just snaps in the locking piece annular groove of cylindrical shell, the top of locking piece body just props up the cylindrical shell annular reverse step in the cylindrical shell, the ring-type inclined plane part just props up cylindrical shell annular stop convex tendon, locking piece annular stop bulge loop just props up the inverse toroidal step at cylindrical shell place, pass through said structure between locking piece body and the cylindrical shell, realize firmly fastening state, comprehensive foregoing description, the art of this patent can realize full-automatic rear portion assembling procedure, has overcome the breach that exists in the prior art.
Above content is in conjunction with concrete preferred implementation further detailed description of the utility model, can not assert that this utility model implementation is confined to above-mentioned these explanations.For this utility model person of an ordinary skill in the technical field, without departing from the concept of the premise utility, can also make some simple deduction or replace, all should be considered as belonging to protection domain of the present utility model.
Claims (5)
1. core bar locking piece, it comprises locking piece body (1), it is characterized in that: described locking piece body (1) is cylindrical, locking piece body (1) bottom outer edge place forms locking piece annular stop bulge loop (2), the outside place of the locking piece body (1) on locking piece annular stop bulge loop (2) top forms locking piece annular stop convex tendon (3), the locking piece body (1) of locking piece annular stop convex tendon (3) upper and lower locates to form respectively ring portion (4) and lower ring portion (5), the locking piece body (1) on upper ring portion (4) top locates to form ring-type inclined plane part (6), the locking piece body (1) on ring-type inclined plane part (6) top locates to form annular core bar interlock ring (7), annular core bar interlock ring (7) locates to form the vertical breach of 1-10 bar (8), the interior cavity wall of annular core bar interlock ring (7) place forms annular self-locking grooves (9), locking piece body (1) vertically is provided with gap (10), and the interior cavity wall of annular core bar interlock ring (7) place on annular self-locking grooves (9) top forms annular guiding surface (11).
2. a kind of core bar locking piece according to claim 1, it is characterized in that: the internal diameter at described locking piece body (1) lower ending opening place is greater than locking piece body (1) the inner chamber place internal diameter of annular self-locking grooves (9) bottom, annular self-locking grooves (9) is located groove-root diameter greater than annular self-locking grooves (9) top and the bottom locking piece bodies (1) inner chamber place internal diameter, locking piece body (1) upper end open place internal diameter is greater than annular self-locking grooves (9) top locking piece body (1) inner chamber place internal diameter, locking piece body (1) upper end open place internal diameter is less than locking piece body (1) lower ending opening place internal diameter, and locking piece annular stop bulge loop (2) external diameter is greater than core bar locking piece (7) upper end external diameter.
3. a kind of core bar locking piece according to claim 1, it is characterized in that: described locking piece annular stop bulge loop (2) external diameter is greater than lower ring portion (5) external diameter 1mm-20mm, and locking piece annular stop bulge loop (2) external diameter is 3mm-58mm,
A kind of core bar locking piece according to claim 1 is characterized in that: the length between described locking piece body (1) top and bottom is 3mm-50mm.
4. a kind of core bar locking piece according to claim 1, it is characterized in that: the angle between described annular self-locking grooves (9) cell wall and the bottom land is the right angle.
5. a kind of core bar locking piece according to claim 1, it is characterized in that: the spacing on top, described gap (10) is up-narrow and down-wide shape less than the spacing of bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220423949 CN202822350U (en) | 2012-08-24 | 2012-08-24 | Core rod locking piece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220423949 CN202822350U (en) | 2012-08-24 | 2012-08-24 | Core rod locking piece |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202822350U true CN202822350U (en) | 2013-03-27 |
Family
ID=47934162
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220423949 Withdrawn - After Issue CN202822350U (en) | 2012-08-24 | 2012-08-24 | Core rod locking piece |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202822350U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103446646A (en) * | 2012-08-24 | 2013-12-18 | 江苏亿乐医疗用品有限公司 | Core rod locking member |
-
2012
- 2012-08-24 CN CN 201220423949 patent/CN202822350U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103446646A (en) * | 2012-08-24 | 2013-12-18 | 江苏亿乐医疗用品有限公司 | Core rod locking member |
| CN103446646B (en) * | 2012-08-24 | 2015-11-18 | 江苏亿乐医疗用品有限公司 | A kind of core bar locking piece |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130327 Effective date of abandoning: 20151118 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |