CN204017034U - Self-locking type syringe piston - Google Patents
Self-locking type syringe piston Download PDFInfo
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- CN204017034U CN204017034U CN201420448834.4U CN201420448834U CN204017034U CN 204017034 U CN204017034 U CN 204017034U CN 201420448834 U CN201420448834 U CN 201420448834U CN 204017034 U CN204017034 U CN 204017034U
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Abstract
This utility model relates to a kind of self-locking type syringe piston.The problem such as easy slippage while moving that it has solved existing piston.Comprise piston only, cone top part, annular groove, the first cylindrical hole, the second cylindrical hole, ring-shaped step, the first annular deformation groove and the second annular deformation groove, in annular groove, be circumferentially with the annular air-pocket with annular compartment, annular air-pocket week exceeds annular groove notch outward, annular air-pocket cross section is the wide structure in narrow the inner, outer end, in the second cylindrical hole, be provided with locking air bag, in locking air bag, there is locking cavity, and locking air bag is provided with and is connected with locking cavity and the inner inflation inlet with check valve, on locking air bag, is also connected with mount pad.The advantage of this self-locking type syringe piston is: simple in structure, good airproof performance, can be automatically by push-pull bar fixation when piston moves, and piston is installed firmly, and piston and push-pull bar are difficult for producing and depart from, and piston moves smooth and easy.
Description
Technical field
This utility model belongs to mechanical equipment technical field, especially relates to a kind of self-locking type syringe piston.
Background technology
Syringe is a kind of common medical instruments, mainly in order to liquid medicine injection or drawing liquid.It mainly comprises syringe needle, syringe tube, piston and push-pull bar, during use, syringe needle is inserted to medicinal liquid, drawing push-pull bar drive piston moves medicinal liquid is entered in syringe tube, then carries out regular injection, so piston is the critical component that affects syringe products quality.Common syringe has good sealing in order to guarantee to use and the brisk piston that needs of push-and-pull has double requirements, require piston and syringe tube inner seal good, reduce again the resistance of piston and syringe tube simultaneously, but existing piston, especially the piston being used in large-scale syringe is difficult to reach this two requirements, when moving, piston easily there is the phenomenon that piston and push-pull bar depart from, so just caused syringe to use normally, in addition, existing piston also exists: complex structure, sealing is poor, mobile having some setbacks, the problems such as intensity is low.
The problem existing in order to solve prior art, people have carried out long-term exploration, have proposed solution miscellaneous.For example, Chinese patent literature discloses a kind of rubber piston for injector [application number: 200920231200.2], the housing that comprises one end through hole, other end sealing, in housing, there is the cavity of depositing injection rod, one end of described housings close is taper, what taper was protruded is arranged on housing, is at least provided with a projection on described taper surface, and one end of described housing through-hole is provided with interior flanging.
Such scheme has solved the poor problem of sealing between existing piston and syringe cylinder to a certain extent, but this scheme still exists: complex structure, and easy and push-pull bar disengaging when piston moves, mobile having some setbacks, piston is fixed unstable problem.
Summary of the invention
The purpose of this utility model is for the problems referred to above, provides a kind of simple and reasonable, is difficult for the self-locking type syringe piston departing from push-pull bar when piston moves.
For achieving the above object, this utility model has adopted following technical proposal: this self-locking type syringe piston, comprise cylindrical piston only, described piston only is circumferentially with annular groove, described piston only top has cone top part, described piston only bottom has staged installing hole, described staged installing hole comprises the first cylindrical hole that is arranged on piston only bottom, the first described cylindrical hole is connected with the second cylindrical hole, and the diameter of the first described cylindrical hole is less than the second cylindrical hole diameter, and form ring-shaped step between the first described cylindrical hole and the second cylindrical hole, it is characterized in that, described piston only top circumferential edge is provided with the first V-shaped annular deformation groove of cross section, described cone top part is positioned at the first annular deformation groove inner side and described cone top part is connected with the first annular deformation groove one side channel mouth, described piston only bottom circumferential edge is provided with the second annular deformation groove V-shaped and that be symmetrically set with the first annular deformation groove, in described annular groove, be circumferentially with the annular air-pocket that at least one has annular compartment and is circumferentially connected with piston only, described annular air-pocket week exceeds annular groove notch outward, described annular air-pocket cross section is the wide structure in narrow the inner, outer end, and the inner diameter that described annular air-pocket is connected with piston only to the diameter of outer end diminishes, in the second described cylindrical hole, be provided with the locking air bag that can be full of the second cylindrical hole, in described locking air bag, there is the locking cavity being connected with annular compartment, and described locking air bag is provided with and is connected with locking cavity and the inner inflation inlet with check valve, on described locking air bag, be also connected with mount pad.When in this structure, the first annular deformation groove and the second annular deformation groove are convenient to piston only and are moved, two ends produce deformation, by inflation inlet, will in locking air bag and annular air-pocket, fill with gas, when piston is static, gas in locking air bag and annular air-pocket keeps balance, annular air-pocket is against being arranged on the sealing that syringe inside ensuring is good, locking air bag is full of whole the second cylindrical hole, when piston only moves, the annular air-pocket generation deformation that is squeezed, thereby the gas flow locking cavity in annular compartment make to lock air bag continue to expand by be connected with locking air bag and for being connected the mount pad fixation of push-pull bar.
In above-mentioned self-locking type syringe piston, the middle part week that described annular groove is arranged on piston only laterally, and described annular groove both sides form respectively isometric annular brace step, and the groove depth of the first described annular deformation groove and the second annular deformation groove is all no more than the length of annular brace step.Guaranteed the structural strength of piston only.
In above-mentioned self-locking type syringe piston, described cone top part is provided with some reinforcements that are circumferentially uniformly distributed setting, and described reinforcement from cone top part upper end to downward-extension.Avoided cone top part to produce deformation.
In above-mentioned self-locking type syringe piston, described mount pad is arranged on locking air bag lower end and leans with ring-shaped step, described mount pad is fixedly linked with locking air bag, the center of described mount pad has installing hole, and described mount pad is provided with the inlet channel that is positioned at installing hole one side and is connected with air inlet.When piston only moves, lock air bag by mount pad against being arranged on ring-shaped step.
In above-mentioned self-locking type syringe piston, described ring-shaped step is provided with some annular positioning grooves, in described mount pad, be provided with some and annular positioning groove circular orientation projection one to one, and the clamping of described circular orientation projection is arranged in annular positioning groove.In this structure, under the effect of locking air bag, the clamping of circular orientation projection is arranged in annular positioning groove, makes mount pad fixation.
In above-mentioned self-locking type syringe piston, described annular air-pocket outer end has arc convex portion, described annular air-pocket week both sides up and down be outward respectively equipped with the annular friction circle being positioned in arc convex portion.When being moved, piston only is more easy to produce deformation.
In above-mentioned self-locking type syringe piston, described annular air-pocket is connected with described locking air bag by some air guide channels.
In above-mentioned self-locking type syringe piston, the quantity of described air guide channel is that two and described air guide channel are symmetrically set.
In above-mentioned self-locking type syringe piston, the bottom land of described annular groove both sides is to the notch outward-dipping formation flaring structure that arranges gradually.This structure is annular air-pocket deformation headspace.
Compared with prior art, the advantage of this self-locking type syringe piston is: simple in structure, good airproof performance, can be automatically by push-pull bar fixation when piston moves, and piston is installed firmly, and piston and push-pull bar are difficult for producing and depart from, and piston moves smooth and easy.
Accompanying drawing explanation
The structural representation that Fig. 1 provides for this utility model.
In figure, piston only 1, staged installing hole 11, the first cylindrical hole 111, the second cylindrical hole 112, ring-shaped step 113, cone top part 12, the annular deformation groove 14 of the annular deformation groove 13, second of reinforcement 121, first, annular groove 2, annular brace step 21, annular air-pocket 3, annular compartment 31, arc convex portion 32, annular friction circle 33, locking air bag 4, locking cavity 41, inflation inlet 42, mount pad 5, installing hole 51, inlet channel 52, annular positioning groove 53, circular orientation projection 54, air guide channel 6.
The specific embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in more detail.
As shown in Figure 1, this self-locking type syringe piston, comprise cylindrical piston only 1, piston only 1 is circumferentially with annular groove 2, piston only 1 top has cone top part 12, piston only 1 bottom has staged installing hole 11, staged installing hole 11 comprises the first cylindrical hole 111 that is arranged on piston only 1 bottom, the first cylindrical hole 111 is connected with the second cylindrical hole 112, and the diameter of the first cylindrical hole 111 is less than the second cylindrical hole 112 diameter, and form ring-shaped step 113 between the first cylindrical hole 111 and the second cylindrical hole, piston only 1 top circumferential edge is provided with the first V-shaped annular deformation groove 13 of cross section, cone top part 12 is positioned at the first annular deformation groove 13 inner sides and cone top part 12 is connected with the first annular deformation groove 13 1 side channel mouths, piston only 1 bottom circumferential edge is provided with the second annular deformation groove 14 V-shaped and that be symmetrically set with the first annular deformation groove 13, in annular groove 2, be circumferentially with the annular air-pocket 3 that at least one has annular compartment 31 and is circumferentially connected with piston only 1, annular air-pocket exceeds annular groove 2 notches for 3 weeks outward, annular air-pocket 3 cross sections are the wide structure in narrow the inner, outer end, and the inner diameter that annular air-pocket 3 is connected with piston only 1 to the diameter of outer end diminishes, in the second cylindrical hole 112, be provided with the locking air bag 4 that can be full of the second cylindrical hole 112, in locking air bag 4, there is the locking cavity 41 being connected with annular compartment 31, and locking air bag 4 is provided with and is connected with locking cavity 41 and the inner inflation inlet 42 with check valve, on locking air bag 4, be also connected with mount pad 5, when in this structure, the first annular deformation groove 13 and the second annular deformation groove 14 are convenient to piston only 1 and are moved, two ends produce deformation, piston only 1 is moved smooth and easy, by inflation inlet 42, will in locking air bag 4 and annular air-pocket 3, fill with gas, when piston is static, locking air bag 4 keeps balance with the gas in annular air-pocket 3, annular air-pocket 3 is against being arranged on the sealing that syringe inside ensuring is good, locking air bag 4 is full of whole the second cylindrical hole, when piston only moves, the annular air-pocket 3 generation deformation that is squeezed, thereby 31 gas flow locking cavity 41 makes to lock air bag 4 and continues to expand by that be connected with locking air bag 4 and for being connected mount pad 5 fixations of push-pull bar in annular compartment.
The middle part week that annular groove 2 in the present embodiment is arranged on piston only 1 laterally, and annular groove 2 both sides form respectively isometric annular brace step 21, and the groove depth of the first annular deformation groove 13 and the second annular deformation groove 14 is all no more than the length of annular brace step 21, guaranteed like this structural strength of piston only 1.For fear of cone top part 12, produce deformation, cone top part 12 is provided with some reinforcements 121 that are circumferentially uniformly distributed setting, and reinforcement 121 from cone top part 12 upper ends to downward-extension.
Preferably, the mount pad 5 is here arranged on locking air bag 4 lower ends and leans with ring-shaped step 113, mount pad 5 is fixedly linked with locking air bag 4, the center of mount pad 5 has installing hole 51, mount pad 5 is provided with the inlet channel 52 that is positioned at installing hole 51 1 sides and is connected with inflation inlet 42, when piston only 1 moves, lock air bag 4 by mount pad 5 against being arranged on ring-shaped step 113.Further, the ring-shaped step 113 is here provided with some annular positioning grooves 53, in mount pad 5, be provided with some and annular positioning groove 53 circular orientation projection 54 one to one, and 54 clampings of circular orientation projection are arranged in annular positioning groove 53, under 4 effects of locking air bag, 54 clampings of circular orientation projection are arranged in annular positioning groove 53, make mount pad 5 fixations.
More be easy to produce deformation when piston only 1 is moved, annular air-pocket 3 outer ends have arc convex portion 32, and annular air-pocket 3 weeks both sides up and down are outward respectively equipped with the annular friction circle 33 being positioned in arc convex portion 32.Particularly, the annular air-pocket here 3 is connected with locking air bag 4 by some air guide channels 6.Preferably, the quantity of the air guide channel 6 is here that two and air guide channel 6 are symmetrically set.In order to give annular air-pocket deformation headspace, the bottom land of annular groove 2 both sides is to the notch outward-dipping formation flaring structure that arranges gradually.
Specific embodiment described herein is only to the explanation for example of this utility model spirit.This utility model person of ordinary skill in the field can make various modifications or supplements or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present utility model or surmount the defined scope of appended claims.
Although more used piston only 1 herein, staged installing hole 11, the first cylindrical hole 111, the second cylindrical hole 112, ring-shaped step 113, cone top part 12, reinforcement 121, the first annular deformation groove 13, the second annular deformation groove 14, annular groove 2, annular brace step 21, annular air-pocket 3, annular compartment 31, arc convex portion 32, annular friction circle 33, locking air bag 4, locking cavity 41, inflation inlet 42, mount pad 5, installing hole 51, inlet channel 52, annular positioning groove 53, circular orientation projection 54, air guide channel 6 terms such as grade, but do not get rid of the probability of using other term.Use these terms to be only used to describe more easily and explain essence of the present utility model; They are construed to any additional restriction is all contrary with this utility model spirit.
Claims (9)
1. a self-locking type syringe piston, comprise cylindrical piston only (1), described piston only (1) is circumferentially with annular groove (2), described piston only (1) top has cone top part (12), described piston only (1) bottom has staged installing hole (11), described staged installing hole (11) comprises the first cylindrical hole (111) that is arranged on piston only (1) bottom, described the first cylindrical hole (111) is connected with the second cylindrical hole (112), and the diameter of described the first cylindrical hole (111) is less than the second cylindrical hole (112) diameter, and form ring-shaped step (113) between described the first cylindrical hole (111) and the second cylindrical hole, it is characterized in that, described piston only (1) top circumferential edge is provided with the first V-shaped annular deformation groove (13) of cross section, described cone top part (12) is positioned at the first annular deformation groove (13) inner side and described cone top part (12) is connected with the first annular deformation groove (13) one side channel mouths, described piston only (1) bottom circumferential edge is provided with the second annular deformation groove (14) V-shaped and that be symmetrically set with the first annular deformation groove (13), in described annular groove (2), be circumferentially with the annular air-pocket (3) that at least one has annular compartment (31) and is circumferentially connected with piston only (1), exceed outward annular groove (2) notch described annular air-pocket (3) week, described annular air-pocket (3) cross section is the wide structure in narrow the inner, outer end, and the inner diameter that described annular air-pocket (3) is connected with piston only (1) to the diameter of outer end diminishes, in described the second cylindrical hole (112), be provided with the locking air bag (4) that can be full of the second cylindrical hole (112), in described locking air bag (4), there is the locking cavity (41) being connected with annular compartment (31), and described locking air bag (4) is provided with and is connected with locking cavity (41) and the inner inflation inlet (42) with check valve, on described locking air bag (4), be also connected with mount pad (5).
2. self-locking type syringe piston according to claim 1, it is characterized in that, the middle part week that described annular groove (2) is arranged on piston only (1) laterally, and described annular groove (2) both sides form respectively isometric annular brace step (21), and the groove depth of the first described annular deformation groove (13) and the second annular deformation groove (14) is all no more than the length of annular brace step (21).
3. self-locking type syringe piston according to claim 1, it is characterized in that, described cone top part (12) is provided with some reinforcements (121) that are circumferentially uniformly distributed setting, and described reinforcement (121) from cone top part (12) upper end to downward-extension.
4. according to the self-locking type syringe piston described in claim 1 or 2 or 3, it is characterized in that, described mount pad (5) is arranged on locking air bag (4) lower end and leans with ring-shaped step (113), described mount pad (5) is fixedly linked with locking air bag (4), the center of described mount pad (5) has installing hole (51), and described mount pad (5) is provided with the inlet channel (52) that is positioned at installing hole (51) one sides and is connected with inflation inlet (42).
5. self-locking type syringe piston according to claim 4, it is characterized in that, described ring-shaped step (113) is provided with some annular positioning grooves (53), in described mount pad (5), be provided with some and annular positioning groove (53) circular orientation projection (54) one to one, and (54) clamping of described circular orientation projection is arranged in annular positioning groove (53).
6. according to the self-locking type syringe piston described in claim 1 or 2 or 3, it is characterized in that, described annular air-pocket (3) outer end has arc convex portion (32), and all both sides up and down outward of described annular air-pocket (3) are respectively equipped with the annular friction circle (33) being positioned in arc convex portion (32).
7. self-locking type syringe piston according to claim 6, is characterized in that, described annular air-pocket (3) is connected with described locking air bag (4) by some air guide channels (6).
8. self-locking type syringe piston according to claim 7, is characterized in that, the quantity of described air guide channel (6) is that two and described air guide channel (6) are symmetrically set.
9. self-locking type syringe piston according to claim 1, is characterized in that, the bottom land of described annular groove (2) both sides is to the notch outward-dipping formation flaring structure that arranges gradually.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420448834.4U CN204017034U (en) | 2014-08-09 | 2014-08-09 | Self-locking type syringe piston |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420448834.4U CN204017034U (en) | 2014-08-09 | 2014-08-09 | Self-locking type syringe piston |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204017034U true CN204017034U (en) | 2014-12-17 |
Family
ID=52056951
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420448834.4U Expired - Fee Related CN204017034U (en) | 2014-08-09 | 2014-08-09 | Self-locking type syringe piston |
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| Country | Link |
|---|---|
| CN (1) | CN204017034U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111904856A (en) * | 2020-08-06 | 2020-11-10 | 浙江灵洋医疗器械有限公司 | Medical medicine dispenser |
-
2014
- 2014-08-09 CN CN201420448834.4U patent/CN204017034U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111904856A (en) * | 2020-08-06 | 2020-11-10 | 浙江灵洋医疗器械有限公司 | Medical medicine dispenser |
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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 |
Granted publication date: 20141217 Termination date: 20150809 |
|
| EXPY | Termination of patent right or utility model |