CN201469821U - Piston rod locking device for needleless injection system - Google Patents
Piston rod locking device for needleless injection system Download PDFInfo
- Publication number
- CN201469821U CN201469821U CN2009201961833U CN200920196183U CN201469821U CN 201469821 U CN201469821 U CN 201469821U CN 2009201961833 U CN2009201961833 U CN 2009201961833U CN 200920196183 U CN200920196183 U CN 200920196183U CN 201469821 U CN201469821 U CN 201469821U
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- Prior art keywords
- inner ring
- piston rod
- movable
- ring
- projection
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- 238000002347 injection Methods 0.000 title claims abstract description 40
- 239000007924 injection Substances 0.000 title claims abstract description 40
- 238000007363 ring formation reaction Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 8
- 238000005096 rolling process Methods 0.000 abstract description 5
- 238000007920 subcutaneous administration Methods 0.000 abstract description 2
- 238000012377 drug delivery Methods 0.000 abstract 1
- 241001465754 Metazoa Species 0.000 description 11
- 229960005486 vaccine Drugs 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 241000282898 Sus scrofa Species 0.000 description 3
- 238000011081 inoculation Methods 0.000 description 3
- 238000001467 acupuncture Methods 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 208000015181 infectious disease Diseases 0.000 description 2
- 235000013372 meat Nutrition 0.000 description 2
- 206010037660 Pyrexia Diseases 0.000 description 1
- 238000002835 absorbance Methods 0.000 description 1
- 238000009395 breeding Methods 0.000 description 1
- 230000001488 breeding effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000036039 immunity Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 206010033675 panniculitis Diseases 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 210000004304 subcutaneous tissue Anatomy 0.000 description 1
- 230000000472 traumatic effect Effects 0.000 description 1
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- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The utility model relates to a piston rod locking device for a needleless injection system and belongs to the field of spare and accessory parts of a subcutaneous needleless drug delivery system in a medical device. The piston rod locking device comprises a rolling ball locker and a piston rod with a circumferential groove at the middle part, wherein the rolling ball locker comprises a movable outer ring, a fixed outer ring, a movable inner ring and a fixed inner ring which are matched and arranged from outside to inside in sequence; a first through hole is formed on the fixed outer ring; the movable outer ring is fixedly connected with the movable inner ring through a bolt positioned in the first through hole; the fixed inner ring is arranged on the outer wall at the rear end of the piston rod; the outer wall at the tail end of the fixed inner ring extends outwards to form a lug; a certain stroke is reserved between the right end surface of the movable inner ring and the left end surface of the lug; a circle of bulges is arranged on the inner wall of the movable inner ring and matched with the outer wall of the fixed inner wall; a reset spring is arranged in a gap positioned between the movable inner ring and the fixed inner ring on the left side of the circle of bulges; and a second through hole for holding the rolling ball is arranged on the right side of the circle of bulges on the fixed inner ring. The friction between the piston rod and the locking device is small in the locking and unlocking process.
Description
Technical field
This utility model provides a kind of piston rod lock uint of Needleless injection system, belongs to the spare and accessory parts technical field of subcutaneous needleless drug-supplying system in the medical device.
Background technology
Needleless injection system acts on by high pressure and produces high velocity jet on the liquid medicine, is used for skin puncture liquid medicine is sent into subcutaneous tissue.The Needleless injection system that is used for the animal vaccine injection, external existing procucts listing.Cultivated animals will carry out inoculation usually.For example, for avoiding swine fever, the intensive pig production field require to annual spring of pig, autumn with each immunity inoculation of vaccine once.Needleless injection is used for the animal vaccine injection, can bring a series of advantage: increase biological safety: eliminate the infection that acupuncture brings, significantly reduce the generation of animal pestilence; Increase injection efficiency:, improved the absorbance of vaccine because of jet injection; Increase the meat safety: have the pin injection to have fracture in animal body hidden danger of syringe needle, influence the meat edible safety, jet injection has been eliminated this type of hidden danger fully; Increase injection speed: jet injection was finished in moment, had significantly reduced the time of scale injection; Increase operator safety: the infection hidden danger that threat that is formed by acupuncture in the injection process and syringe needle processing bring is thoroughly eliminated; Increase environmental conservation: the cost that syringe needle and other consumptive materials are handled reduces greatly; Reduce the traumatic of animal: because jet injection finishes in moment, have the pin injection much smaller to the wound ratio of skin, animal does not have the frightened reaction or the like of being afraid of.
The inoculation of animal is usually concentrated in batches and is carried out, and this Needleless injection system that just requires to be used for the animal injection can repeatedly use, and preferably can inject continuously to improve injection speed.The preposition patent of applicant " the novel injector that is used for the Needleless injection " (patent No.: ZL200620140489.3), (patent No.: ZL200720192720.8) described and a kind ofly produce power and the needleless injector that can use is repeatedly propelled device by spring, this device meshes by elastic fin and the bolt thread that has spring and carries out power and reset " device of propelling that is used for needleless injection of liquids ".Another applies for a patent that " what be used for liquid jet injection propels device (application number: 200920114142.5) then described a kind of needleless injector that resets by clasp nut and propelled device the applicant.In the injector design of above-mentioned Needleless injection device, the mechanism that has all adopted handle and block.This mechanism is when spring reset, and the piston that is used for having brute spring pins by block, and removes by the block that handle will block piston in when injection, realizes injection.Because the spring Needleless injection device generally adopts high-intensity spring (pressure is more than 20N usually), the locking mechanism of handle and block block and piston area in sealed and the process opened produce planar friction, cause the loss of block and piston easily, will carry out the surfacing processing at block and piston contact position usually.This locking mechanism is not suitable for continuously injecting animals, because the vaccine injection of breeding scale animal will be injected nearly hundreds of usually continuously, planar friction so repeatedly causes the loss of locking mechanism extremely easily.
The utility model content
In order to address the above problem, this utility model provides the piston rod lock uint of the Needleless injection system that frictional force is little between the piston rod and locking mechanism in a kind of sealed and opening procedure.
To achieve these goals, the technical scheme that this utility model adopted is:
A kind of piston rod lock uint of Needleless injection system comprises that a ball closure device and a middle part offer the piston rod of circumferential slot; Wherein its right end face of circumferential slot is an inclined plane to the inclination of piston rod rear end; The ball closure device comprises the movable outer ring that is equipped with successively from outside to inside, fixedly outer ring, movable inner ring, fixing inner ring, wherein fixedly offer first through hole on the outer ring, pass through the screw Joint between movable outer ring and the movable inner ring, and this screw is positioned at first through hole; Fixedly inner ring is equipped with on the outer wall of the rear end of piston rod, the fixing terminal outer wall of the inner ring formation projection that stretches out, and fixedly inner ring passes through this projection and fixing outer ring Joint, leaves certain stroke between the right side of movable inner ring and the left side of projection; The inwall of movable inner ring is provided with one and encloses the projection that extends internally and form, and projection and fixing interior ring outer wall match, and protruding right side is an inclined-plane that is tilted to the left; In projection left side and at movable inner ring and fixedly be provided with back-moving spring in the gap between the inner ring; Fixedly on the inner ring, be positioned at protruding right side, offer second through hole that is placed with ball.
As the further setting of such scheme, offer two first through holes that the position is relative on the described fixedly outer ring.
On the described fixedly inner ring, be positioned at protruding right side, offer second through hole that two positions are placed with ball relatively and all.
The piston rod lock uint of this utility model Needleless injection system adopts the locking mechanism of ball-type, is used for the sealed piston rod that has brute spring, and opens piston rod when injection.This device changes planar friction between ball and the rolling groove rolling friction, thereby has significantly reduced the frictional force between the piston rod and locking mechanism in sealed and the opening procedure, has prolonged service life.This device is suitable for the Needleless injection that repeated multiple times is carried out.
The utility model is described in further detail below in conjunction with the drawings and specific embodiments.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is that this utility model is from release conditions to the sketch map that begins to lock;
Fig. 3 for this utility model from locking state to the sketch map that begins to discharge.
The specific embodiment
As shown in Figure 1, the piston rod lock uint of this utility model Needleless injection system comprises that a ball closure device and a middle part offer the piston rod 1 of circumferential slot 2.Wherein its right end face of circumferential slot 2 is an inclined plane 15 to the inclination of piston rod 1 rear end.The ball closure device comprises the movable outer ring 8 that is equipped with successively from outside to inside, fixedly outer ring 4, movable inner ring 5, fixing inner ring 10.Fixedly offer first through hole 6 on the outer ring 4, pass through screw 13 Joints between movable outer ring 8 and the movable inner ring 5, and this screw 13 is positioned at first through hole 6.Fixedly inner ring 10 is equipped with on the outer wall of the rear end of piston rod 1, fixedly inner ring 10 terminal outer walls stretch out and form projection 9, fixedly inner ring 10 leaves certain stroke by this projection 9 and fixing outer ring 4 Joints between the left side of the right side of movable inner ring 5 and projection 9.The inwall of movable inner ring 5 is provided with that a circle extends internally and the projection 14 that forms, and projection 14 matches with fixing inner ring 10 outer walls, and protruding 14 right sides are an inclined-plane that is tilted to the left 12; In protruding 14 left sides and at movable inner ring 5 and fixedly be provided with back-moving spring 3 in the gap between the inner ring 10; Fixedly on the inner ring 10, be positioned at protruding 14 right sides, offer second through hole 11 that is placed with ball 7.
More steady for what movable outer ring 8, movable inner ring 5 were moved, fixedly offer two first through holes 6 that the position is relative on the outer ring 4.
More stable for the locking state that makes piston rod 1, fixedly on the inner ring 10, be positioned at protruding 14 right sides, offer second through hole 11 that two positions are placed with ball 7 relatively and all.
Operation principle of the present utility model is as follows:
In conjunction with Fig. 1, shown in Figure 2, piston rod 1 is subjected to the external force effect to the right in the traveling process, when the inclined plane 15 of circumferential slot 2 contacts with ball 7, movable inner ring 5 is owing to be subjected to back-moving spring 3 thrust to the right, it is the elastic restoring force of back-moving spring 3, movable inner ring 5 drive activity outer rings 8 move right together, and the projection 14 of movable inner ring 5 just is pressed into ball 7 in the circumferential slot 2 along inclined plane 15 in the moving process, thereby piston rod 1 is pinned.
Of particular note, piston rod 1 is as a vitals propelling device in the existing Needleless injection system, and it has spring 16 is routine techniquess, and therefore, present specification does not just remake it and given unnecessary details.When piston rod 1 was lockable, spring 16 was in compressed state.
In conjunction with Fig. 1, shown in Figure 3, be in the piston rod 1 of locking state, when movable outer ring 8 is subjected to left active force, movable outer ring 8 is moved to the left together by screw 13 drive activity inner rings 5, ball 7 just under piston rod 1 active force (elastic restoring force of spring 16) and the characteristic on inclined plane 15 left, loses the locking effect to piston rod 1.
The foregoing description only is used to the inventive concept of the present utility model of explaining, but not to the qualification of this utility model rights protection, allly utilizes this design that this utility model is carried out the change of unsubstantiality, all should fall into protection domain of the present utility model.
Claims (3)
1. the piston rod lock uint of a Needleless injection system is characterized in that: comprise that a ball closure device and a middle part offer the piston rod of circumferential slot; Wherein its right end face of circumferential slot is an inclined plane to the inclination of piston rod rear end; The ball closure device comprises the movable outer ring that is equipped with successively from outside to inside, fixedly outer ring, movable inner ring, fixing inner ring, wherein fixedly offer first through hole on the outer ring, pass through the screw Joint between movable outer ring and the movable inner ring, and this screw is positioned at first through hole; Fixedly inner ring is equipped with on the outer wall of the rear end of piston rod, the fixing terminal outer wall of the inner ring formation projection that stretches out, and fixedly inner ring passes through this projection and fixing outer ring Joint, leaves certain stroke between the right side of movable inner ring and the left side of projection; The inwall of movable inner ring is provided with one and encloses the projection that extends internally and form, and projection and fixing interior ring outer wall match, and protruding right side is an inclined-plane that is tilted to the left; In projection left side and at movable inner ring and fixedly be provided with back-moving spring in the gap between the inner ring; Fixedly on the inner ring, be positioned at protruding right side, offer second through hole that is placed with ball.
2. the piston rod lock uint of Needleless injection system as claimed in claim 1 is characterized in that: offer two first through holes that the position is relative on the described fixedly outer ring.
3. the piston rod lock uint of Needleless injection system as claimed in claim 1 or 2 is characterized in that: on the described fixedly inner ring, be positioned at protruding right side, offer second through hole that two positions are placed with ball relatively and all.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201961833U CN201469821U (en) | 2009-09-10 | 2009-09-10 | Piston rod locking device for needleless injection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201961833U CN201469821U (en) | 2009-09-10 | 2009-09-10 | Piston rod locking device for needleless injection system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201469821U true CN201469821U (en) | 2010-05-19 |
Family
ID=42406059
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201961833U Expired - Lifetime CN201469821U (en) | 2009-09-10 | 2009-09-10 | Piston rod locking device for needleless injection system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201469821U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105232119A (en) * | 2015-10-19 | 2016-01-13 | 王彦 | Bone marrow biopsy puncture needle for medical use |
-
2009
- 2009-09-10 CN CN2009201961833U patent/CN201469821U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105232119A (en) * | 2015-10-19 | 2016-01-13 | 王彦 | Bone marrow biopsy puncture needle for medical use |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: HENAN SHUGUANG MEDICAL EQUIPMENT CO., LTD. Free format text: FORMER OWNER: CHEN KAI Effective date: 20111027 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 312000 SHAOXING, ZHEJIANG PROVINCE TO: 462000 LUOHE, HENAN PROVINCE |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20111027 Address after: The coastal city of Luohe City, Henan Province, Yuanhui District Xiangjiang road 462000 Patentee after: Henan Shuguang Jianshi Medical Equipment Group Co., Ltd. Address before: 102 room 11, pearl garden, Yue Yue District, Zhejiang, Shaoxing, 312000 Patentee before: Chen Kai |
|
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: Luohe City, Henan province 462000 Yuanhui District Riverside Metro Xiangjiang Road Patentee after: Henan Shugang Jianshi Medical Devices Group Co., Ltd. Address before: The coastal city of Luohe City, Henan Province, Yuanhui District Xiangjiang road 462000 Patentee before: Henan Shuguang Jianshi Medical Equipment Group Co., Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20100519 |
|
| CX01 | Expiry of patent term |