CN203971074U - For the needle stand structure of safety injector - Google Patents
For the needle stand structure of safety injector Download PDFInfo
- Publication number
- CN203971074U CN203971074U CN201420099293.9U CN201420099293U CN203971074U CN 203971074 U CN203971074 U CN 203971074U CN 201420099293 U CN201420099293 U CN 201420099293U CN 203971074 U CN203971074 U CN 203971074U
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- Prior art keywords
- needle stand
- ring
- position limiting
- limiting convex
- vertical height
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Abstract
The utility model discloses the needle stand structure for safety injector, it comprises needle stand and lower needle stand, and described upper needle stand and lower needle stand link into an integrated entity by engaging socket mode.It adopts split type upper and lower needle stand structure, both adopt hard card to close connected mode socket, both stability and sealing property are guaranteed, same between needle stand entirety and injector cartridge is to adopt hard fit system to realize stability and sealing property, save the O-ring seal of using in conventional art, needle stand structure is simpler compared to existing technologies, can realize full-automatic assembling, guarantee production efficiency, product global design is reasonable, be skillfully constructed, stable working state, has outstanding substantive distinguishing features and marked improvement compared to existing technologies.
Description
Technical field
This utility model relates to the technical field of medical apparatus and instruments, specifically for the needle stand structure of safety injector, and particularly its mechanical connecting structure.
Background technology
Documents 1, application number: CN201210475052.5, the applying date: 2012.11.20, patentee: Yuhuan Zhengri Suji Co., Ltd., this case discloses " a kind of safety injector ", comprise syringe, core bar, plug and needle holder, described syringe is cylindric, above-mentioned core bar is positioned at syringe and can slides, plug is arranged on core bar the inner and syringe is stretched out in core bar outer end, described needle holder is connected to syringe front end, it is characterized in that, described needle holder inner side has closure, between described needle holder outside and syringe, there is location structure one, between described closure and needle holder inner side, there is location structure two, in the time that location structure two makes closure be connected with needle holder, above-mentioned location structure one can make needle holder and syringe have the trend being connected, on described core bar, there is the interface arrangment that can cross closure and be connected to its end, and above-mentioned needle holder sidepiece can inside contract and make needle holder depart from syringe after above-mentioned core bar drives closure to depart from location structure two.
Documents 2, application number: CN201220491063.8, the applying date: 2012.09.24, patentee: loose hundred million international business limited companies, this case discloses " a kind of safety injector ", comprising: an injection tube, there is a drug storage space, described injection tube top inner loop is provided with a positioning threads, and described injection tube bottom inner loop is provided with a break-off edges, and protrudes a stop section pushing for finger in described bottom outer radial; One push rod, can axially slide up and down the drug storage space in described injection tube, described push rod top has a pushing part, this pushing part is upwards extended with a convex fastening part, locate, be interval with again the contraposition part of multiple projection shapes around in described pushing part lower outer, the sheathed collar of described contraposition part, the below of the described collar is provided with a block edge, the diameter of this block edge is greater than the diameter of convex fastening part, described push rod bottom has a push jack, this push jack is connected with multiple tracks rib, between described rib and block edge, is connected with a cervical region, and the diameter of this cervical region is less than the diameter of this block edge; One needle stand, comprise: the sleeve through part with a passage, under described sleeve through part, convex with a bulge loop, next-door neighbour bulge loop lower end is provided with a concave ring groove and an external spiral section, described external spiral section can closely screw with the positioning threads of described injection tube, and in described passage, is provided with protruding grain, and the rear termination of protruding grain in described passage is established an accommodation space, convex with multiple locating pieces in the surface of described accommodation space, embed for the contraposition part of described push rod.
Documents 3, application number: CN200820214852.0, the applying date: 2008.12.17, patentee: Anzhuo International (Nantong) Medical Devices Co., Ltd., this case discloses " a kind of Self-destructing needlepoint retractile safe syringe needle stand ", it is characterized in that it is by needle stand body, be with bevelled spill bayonet socket, endoporus cylinder is faced directly with two and is with bevelled draw-in groove composition, be arranged on the inside of needle stand body with bevelled spill bayonet socket, two are evenly arranged on the outside lower end of needle stand body with bevelled draw-in groove, match with the circular cone inclined-plane of needle holder core outside with bevelled spill bayonet socket, endoporus cylinder is faced directly with the face of cylinder of needle holder core outside and is matched.
Many employings needle stand retracting mechanism of existing safety injector, and need to take into account the sealing property of needle stand and injector cartridge and required pull-back forces while pulling back at design link, both must reach a poised state could realize best duty.
The pin needle stand structure of pulling back of existing safety injector is too complicated, although perhaps can implement in theory, cannot carry out full-automation at all and assemble, other project organization relatively simply pull back needle stand sealing effectiveness and job stability all not good.
Summary of the invention
The purpose of this utility model is to be provided for the needle stand structure of safety injector, it is a split type needle stand structure, it is made up of upper and lower needle stand, both link into an integrated entity by rigid cooperation socket mode, same by rigid cooperation between needle stand outer wall and syringe cylinder intracoelomic cavity inwall, realize sealing and limit effect.
To achieve these goals, the technical solution of the utility model is: for the needle stand structure of safety injector, it comprises needle stand and lower needle stand, it is characterized in that: described upper needle stand and lower needle stand link into an integrated entity by engaging socket mode.
The utility model discloses a kind of needle stand structure for safety injector, it adopts split type upper and lower needle stand structure, both adopt hard card to close connected mode socket, both stability and sealing property are guaranteed, same between needle stand entirety and injector cartridge is to adopt hard fit system to realize stability and sealing property, (this kind of structure is difficult to realize the assembling of full-automatic rear portion to have saved the O-ring seal of using in conventional art, the stablizing effect of cushion rubber rigging position is not good yet, easily there is cushion rubber displacement, affect sealing effectiveness), needle stand structure is simpler compared to existing technologies, can realize full-automatic assembling, guarantee production efficiency, product global design is reasonable, be skillfully constructed, stable working state, there is compared to existing technologies outstanding substantive distinguishing features and marked improvement.
Brief description of the drawings
Fig. 1 is this utility model structural representation.
Fig. 2 is needle stand structure schematic diagram on this utility model.
Fig. 3 is needle stand structure schematic diagram under this utility model.
Fig. 4 is this utility model using state figure.
Detailed description of the invention
?with reference to the accompanying drawings, this utility model is further described.
Wherein:
1, upper needle stand;
2, lower needle stand;
3, upper needle stand position limiting convex ring;
4, reverse spacing ring-shaped step;
5, ring-type engaging convex tendon;
6, annular recess portion;
7, circular cone shape;
8, ring-type limited step.
This utility model is the needle stand structure for safety injector, and it comprises needle stand 1 and lower needle stand 2, and it is different from prior art and is: described upper needle stand 1 and lower needle stand 2 link into an integrated entity by engaging socket mode.
In the specific implementation, described upper needle stand 1 is cylindrical shape, this cylindrical height is 2mm-15mm, the diameter of cylinder upper end is 1.2mm-4.51mm, the diameter of cylinder lower end is 0.5mm-4mm, this cylindrical outer wall place forms needle stand position limiting convex ring 3, on this, the external diameter of needle stand position limiting convex ring 3 is 1.3mm-5mm, the vertical height of upper needle stand position limiting convex ring 3 is 0.5mm-5mm, vertical height on the upper surface of upper needle stand position limiting convex ring 3 and cylinder between transverse plane is 3mm-5.03mm, the cylindrical body outer wall place of upper needle stand position limiting convex ring 3 belows forms reverse spacing ring-shaped step 4, vertical height between upper needle stand position limiting convex ring 3 lower surfaces and reverse spacing ring-shaped step 4 is 0.2mm-7mm, between upper needle stand position limiting convex ring 3 and reverse spacing ring-shaped step 4, that section of cylindrical diameter is 1mm-4.8mm, vertical height under reverse spacing ring-shaped step 4 and cylinder between transverse plane is 0.5mm-8mm.
In the specific implementation, described lower needle stand 2 is cylindrical shape, lower needle stand 2 inner chambers are hollow form, the inwall place of this hollow cavity forms the ring-type engaging convex tendon 5 that protrudes from inwall, the vertical height of this ring-type engaging convex tendon 5 is 0.2mm-3mm, the upper surface of ring-type engaging convex tendon 5 forms the annular recess portion 6 consistent with ring-type engaging convex tendon 5 annulars, the cross section of this annular recess portion 6 is approximate triangular in shape, the approximate circular cone shape 7 that is of lower needle stand 2 inner chambers of ring-type engaging convex tendon 5 belows, this circular cone shape 7 extends downward lower needle stand 2 inner chamber lower surfaces, the vertical height of this circular cone shape 7 is 0.1mm-3mm, the lower needle stand 2 inner chamber internal diameters of ring-type engaging convex tendon 5 tops are 0.5mm-4mm, the external diameter of lower needle stand 2 is 1mm-4.81mm, the vertical height of lower needle stand 2 is 1mm-15mm, lower needle stand 2 forms ring-type limited step 8 near the outer wall place of lower end, the vertical height of this ring-type limited step 8 is 0.2mm-4mm, the external diameter of ring-type limited step 8 is 1.5mm-5.12mm, the ring body of ring-type limited step 8 protrudes from the horizontal range 0.1mm-2mm of lower needle stand 2 outer walls.
In the specific implementation, the diameter of described upper needle stand 1 upper end is less than needle stand position limiting convex ring 3 external diameters, the external diameter of upper needle stand position limiting convex ring 3 is greater than the external diameter of that section of upper needle stand 1 between needle stand position limiting convex ring 3 and reverse spacing ring-shaped step 4, between needle stand position limiting convex ring 3 and reverse spacing ring-shaped step 4, the external diameter of that section of upper needle stand 1 is more than or equal to the diameter of cylinder lower end, the interior warp that between needle stand position limiting convex ring 3 and reverse spacing ring-shaped step 4, the external diameter of that section of upper needle stand 1 is greater than lower needle stand 2 upper end inner chambers (guarantees that both hard coordinates, realize sealing and the effect that is fixed), lower needle stand 2 upper end external diameters are greater than needle stand 1 upper end external diameter,
In the specific implementation, on the upper surface of described upper needle stand position limiting convex ring 3 and cylinder, the vertical height between transverse plane is greater than the vertical height of the needle stand position limiting convex ring supreme needle stand of 3 upper surface 1 lower surface.
In the specific implementation, under described reverse spacing ring-shaped step 4 and cylinder, the vertical height between transverse plane is greater than between needle stand position limiting convex ring 3 and reverse spacing ring-shaped step 4 vertical height of that section of upper needle stand 1.
In the specific implementation, the external diameter of described ring-type limited step 8 is greater than lower needle stand 2 upper end external diameters.
In the specific implementation, the bottom of described annular recess portion 6 is oblique plane or cambered surface, and the level height of this oblique plane is low outside the height of inner side.
In the specific implementation, the lower plane of described upper needle stand position limiting convex ring 3 props up lower needle stand 2 upper surfaces downwards, upper needle stand 1 hypomere inserts lower needle stand 2 inner chambers, and between needle stand position limiting convex ring 3 and reverse spacing ring-shaped step 4, the upper needle stand 1 of that section is sticked in the interior cavity wall of lower needle stand 2 place firmly.
As shown in Figure 4, needle stand is being fitted into after cylindrical shell 9, and ring-type limited step 8 and upper needle stand position limiting convex ring 3 all upwards prop up the annular stop step of cylinder lumen, effectively prevents that needle stand forward end from skidding off, meanwhile, this two place can also realize the sealing effectiveness between needle stand and cylindrical shell
Above content is in conjunction with concrete preferred implementation further detailed description of the utility model, can not assert that the concrete enforcement of this utility model 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 (3)
1. for the needle stand structure of safety injector, it comprises needle stand (1) and lower needle stand (2), it is characterized in that: described upper needle stand (1) and lower needle stand (2) link into an integrated entity by engaging socket mode, described upper needle stand (1) is cylindrical shape, this cylindrical height is 2mm-15mm, the diameter of cylinder upper end is 1.2mm-4.51mm, the diameter of cylinder lower end is 0.5mm-4mm, this cylindrical outer wall place forms needle stand position limiting convex ring (3), on this, the external diameter of needle stand position limiting convex ring (3) is 1.3mm-5mm, the vertical height of upper needle stand position limiting convex ring (3) is 0.5mm-5mm, vertical height on the upper surface of upper needle stand position limiting convex ring (3) and cylinder between transverse plane is 3mm-5.03mm, the cylindrical body outer wall place of upper needle stand position limiting convex ring (3) below forms reverse spacing ring-shaped step (4), vertical height between upper needle stand position limiting convex ring (3) lower surface and reverse spacing ring-shaped step (4) is 0.2mm-7mm, between upper needle stand position limiting convex ring (3) and reverse spacing ring-shaped step (4), that section of cylindrical diameter is 1mm-4.8mm, vertical height under reverse spacing ring-shaped step (4) and cylinder between transverse plane is 0.5mm-8mm, described lower needle stand (2) is cylindrical shape, lower needle stand (2) inner chamber is hollow form, the inwall place of this hollow cavity forms the ring-type engaging convex tendon (5) that protrudes from inwall, the vertical height of this ring-type engaging convex tendon (5) is 0.2mm-3mm, the upper surface of ring-type engaging convex tendon (5) forms the annular recess portion (6) consistent with ring-type engaging convex tendon (5) annular, the cross section of this annular recess portion (6) is approximate triangular in shape, the approximate circular cone shape (7) that is of lower needle stand (2) inner chamber of ring-type engaging convex tendon (5) below, this circular cone shape (7) extends downward lower needle stand (2) inner chamber lower surface, the vertical height of this circular cone shape (7) is 0.1mm-3mm, lower needle stand (2) the inner chamber internal diameter of ring-type engaging convex tendon (5) top is 0.5mm-4mm, the external diameter of lower needle stand (2) is 1mm-4.81mm, the vertical height of lower needle stand (2) is 1mm-15mm, lower needle stand (2) forms ring-type limited step (8) near the outer wall place of lower end, the vertical height of this ring-type limited step (8) is 0.2mm-4mm, the external diameter of ring-type limited step (8) is 1.5mm-5.12mm, the ring body of ring-type limited step (8) protrudes from the horizontal range 0.1mm-2mm of lower needle stand (2) outer wall, the diameter of described upper needle stand (1) upper end is less than needle stand position limiting convex ring (3) external diameter, the external diameter of upper needle stand position limiting convex ring (3) is greater than the external diameter of the upper needle stand (1) of that section between needle stand position limiting convex ring (3) and reverse spacing ring-shaped step (4), between needle stand position limiting convex ring (3) and reverse spacing ring-shaped step (4), the external diameter of the upper needle stand (1) of that section is more than or equal to the diameter of cylinder lower end, between needle stand position limiting convex ring (3) and reverse spacing ring-shaped step (4), the external diameter of the upper needle stand (1) of that section is greater than the interior warp of lower needle stand (2) upper end inner chamber, lower needle stand (2) upper end external diameter is greater than needle stand (1) upper end external diameter, vertical height on the upper surface of described upper needle stand position limiting convex ring (3) and cylinder between transverse plane is greater than the vertical height of the supreme needle stand of needle stand position limiting convex ring (3) upper surface (1) lower surface, vertical height under described reverse spacing ring-shaped step (4) and cylinder between transverse plane is greater than the vertical height of the upper needle stand (1) of that section between needle stand position limiting convex ring (3) and reverse spacing ring-shaped step (4), the external diameter of described ring-type limited step (8) is greater than lower needle stand (2) upper end external diameter.
2. the needle stand structure for safety injector according to claim 1, is characterized in that: the bottom of described annular recess portion (6) is oblique plane or cambered surface, and the level height of this oblique plane is low outside the height of inner side.
3. the needle stand structure for safety injector according to claim 1, it is characterized in that: the lower plane of described upper needle stand position limiting convex ring (3) props up lower needle stand (2) upper surface downwards, upper needle stand (1) hypomere inserts lower needle stand (2) inner chamber, and between needle stand position limiting convex ring (3) and reverse spacing ring-shaped step (4), the upper needle stand (1) of that section is sticked in the interior cavity wall of lower needle stand (2) place firmly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420099293.9U CN203971074U (en) | 2013-11-26 | 2014-03-06 | For the needle stand structure of safety injector |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320752948 | 2013-11-26 | ||
| CN201320752948.3 | 2013-11-26 | ||
| CN201420099293.9U CN203971074U (en) | 2013-11-26 | 2014-03-06 | For the needle stand structure of safety injector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203971074U true CN203971074U (en) | 2014-12-03 |
Family
ID=51968544
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420099293.9U Expired - Fee Related CN203971074U (en) | 2013-11-26 | 2014-03-06 | For the needle stand structure of safety injector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203971074U (en) |
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2014
- 2014-03-06 CN CN201420099293.9U patent/CN203971074U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141203 Termination date: 20170306 |