CN108853648A - A kind of needleless injector retaining mechanism and needleless injector - Google Patents
A kind of needleless injector retaining mechanism and needleless injector Download PDFInfo
- Publication number
- CN108853648A CN108853648A CN201810911280.XA CN201810911280A CN108853648A CN 108853648 A CN108853648 A CN 108853648A CN 201810911280 A CN201810911280 A CN 201810911280A CN 108853648 A CN108853648 A CN 108853648A
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- movable axis
- locking
- section
- retaining mechanism
- diameter
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- 230000007246 mechanism Effects 0.000 title claims abstract description 34
- 239000011324 bead Substances 0.000 claims description 12
- 230000000694 effects Effects 0.000 abstract description 10
- 238000010586 diagram Methods 0.000 description 13
- 238000002347 injection Methods 0.000 description 7
- 239000007924 injection Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 5
- 230000008859 change Effects 0.000 description 3
- 239000003814 drug Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000005489 elastic deformation Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 210000000078 claw Anatomy 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/30—Syringes for injection by jet action, without needle, e.g. for use with replaceable ampoules or carpules
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
Landscapes
- Health & Medical Sciences (AREA)
- Vascular Medicine (AREA)
- Engineering & Computer Science (AREA)
- Anesthesiology (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Hematology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The invention discloses a kind of needleless injector retaining mechanism and needleless injectors, are related to the field of medical instrument technology.One specific embodiment of the needleless injector retaining mechanism includes：Including sliding block, movable axis and locking member；Gear is provided on the movable axis, the runner that be arranged outside the gear and syringe piston rod, surface is provided with toothing engages；The sliding block is for driving the movable axis to move along its axis；When the movable axis, which is moved to, to be cooperated with the locking member, the locking member is for limiting the movable axis rotation.The embodiment can be realized the smooth locking to piston rod, to promote the safety and using effect of needleless injector.
Description
Technical field
The present invention relates to the field of medical instrument technology more particularly to a kind of needleless injector retaining mechanisms and Needleless injection
Device.
Background technique
Needleless injection techniques refer to when carrying out drug injection not by syringe needle, and drive liquid medicine with ultra-fine, high speed,
The mode that straight line sprays high-pressure jet is directly entered body tissue, to solve conventional injection since syringe needle is pierced into body and band
The a series of problems come.What the realization of needleless injection techniques relied on is needleless injector, needleless injector mainly by pusher and
Pencil composition.Wherein, pencil is made of pencil shell, piston and piston rod.Its working method is：Pusher applies external force to work
Stopper rod after piston rod stress, is released medical fluid by piston from pencil shell, forms jet stream and enters in human body.
In syringe use process, need to adjust medicine taking amount using runner, dose adjusting, which finishes, must lock runner, prevent
Only pencil enters air or squeezes out medical fluid.Fig. 1 and Fig. 2, which is respectively illustrated, to be currently used for the retaining mechanism of needleless injector and is releasing
Structural schematic diagram when state and locking state is put, runner 120 is provided on piston rod 130, being provided with by runner 120 can slide
Dynamic tooth block 111 and the sliding block 110 being connected with tooth block 111, are provided with phase on the outside of the inside of tooth block 111 and runner 120
The toothing mutually cooperated；It using Fig. 1 as observation visual angle, stirs sliding block 110 and is moved right with sliding tooth block 111, make tooth block 111 and turn
The toothing of wheel 120 is meshed, to realize the locking to runner 120.
In the retaining mechanism of the prior art, the toothing angle on tooth block is fixed, it is thus possible to need to finely tune the angle of runner
It spends so that the two engages；It can cause piston play in pencil during this fine tuning, may cause the variation of pharmaceutical quantities
Or air enters, and causes a series of safety problem or influences injection effect.
Summary of the invention
In view of this, the embodiment of the present invention provides a kind of needleless injector retaining mechanism and needleless injector, can be realized
Smooth locking to piston rod, to promote the safety and using effect of needleless injector.
To achieve the above object, according to an aspect of an embodiment of the present invention, a kind of needleless injector locking machine is provided
Structure, including sliding block, movable axis and locking member；It is provided with gear on the movable axis, is set on the gear and syringe piston rod
There is the runner of toothing to engage on set, surface；The sliding block is for driving the movable axis to move along its axis；When the work
When moving axis is moved to locking member cooperation, the locking member is for limiting the movable axis rotation.
In the present embodiment, engaged since the gear of movable axis is remained with runner toothing, to movable axis into
During line-locked, the variation of runner angle will not be caused, to realize the smooth locking to piston rod, promote Needleless injection
The safety and using effect of device.
Optionally, the movable axis includes locking section and releasing section, and the diameter of the locking section is greater than the releasing section
Diameter；When the locking section and the locking member cooperate, the locking member is for fixing the locking section to limit the work
Moving axis rotation.
Optionally, the movable axis includes at least two locking sections, and the locking member is corresponding with the locking section and same
The unilateral bearing of axis setting, the movable axis are set in the unilateral bearing；The diameter of the locking section and the one-way shaft
The internal diameter held is identical, at least one described unilateral bearing and unilateral bearing described in other are oppositely arranged.
In the present embodiment, the rotation of movable axis is limited using at least two oppositely arranged unilateral bearings.Due to list
There is the internal diameter of standard, the processing for movable axis of being more convenient for for other fixed forms to bearing；Further, since unidirectional
The design feature of bearing can make locking section be easy to cooperate with unilateral bearing, so that operation is more smooth.
Optionally, the locking member is at least one ring set；It is provided with bellmouth in the middle part of the ring set, the bellmouth
Minimum diameter is not less than the diameter of the releasing section, and the maximum gauge of the bellmouth is not more than the diameter of the locking section；Institute
Movable axis is stated to be set in the ring set.
In the present embodiment, the locking to movable axis is realized using the ring set for being provided with bellmouth.Due to being to utilize ring set
The frictional force that elastic deformation with movable axis is formed prevents movable axis from rotating, therefore the requirement for design size is lower, is easy to
Processing.
Optionally, the changeover portion of taper is provided between the locking section and releasing section.By the way that changeover portion, Ke Yibao is arranged
Card movable axis swimmingly moves, and avoids locking section from colliding with locking member and cause to damage, influences locking effect.
Optionally, the locking section is tapered, and the locking section is close to the diameter of one end of corresponding locking member
The diameter of the other end less than the locking section far from corresponding locking member.
Optionally, the retaining mechanism further includes location structure, the location structure be used for the locking section with it is described
When locking member cooperates, limits the movable axis and be axially moveable.In order to avoid movable axis is deviate from from retaining mechanism in vibration,
The present embodiment is provided with location structure further to limit the axial movement of movable axis.
Optionally, the positioning mechanism includes positioning bead and the locating slot with positioning bead shape cooperation；Wherein, described
Positioning bead is set to the movable axis side, and the locating slot is set to by the space of the movable axis；Alternatively, described fixed
Position slot is set to the movable axis side, and the positioning bead is set to by the space of the movable axis.
In addition, the needleless injector includes the note in any of the above-described embodiment the present invention also provides a kind of needleless injector
Emitter retaining mechanism.
Further effect possessed by above-mentioned non-usual optional way adds hereinafter in conjunction with specific embodiment
With explanation.
Detailed description of the invention
Attached drawing for a better understanding of the present invention, does not constitute an undue limitation on the present invention.Wherein：
Fig. 1 is structural schematic diagram of the retaining mechanism in release conditions for being currently used for needleless injector；
Fig. 2 is structural schematic diagram of the retaining mechanism in locking state for being currently used for needleless injector；
Fig. 3 is structural schematic diagram of the needleless injector retaining mechanism in release conditions of first embodiment of the invention offer；
Fig. 4 is structural schematic diagram of the needleless injector retaining mechanism in locking state of first embodiment of the invention offer；
Fig. 5 is the structural schematic diagram of movable axis in needleless injector retaining mechanism provided in an embodiment of the present invention；
Fig. 6 is structural schematic diagram of the needleless injector retaining mechanism in release conditions of second embodiment of the invention offer；
Fig. 7 is structural schematic diagram of the needleless injector retaining mechanism in locking state of second embodiment of the invention offer.
Specific embodiment
Below in conjunction with attached drawing, an exemplary embodiment of the present invention will be described, including the various of the embodiment of the present invention
Details should think them only exemplary to help understanding.Therefore, those of ordinary skill in the art should recognize
It arrives, it can be with various changes and modifications are made to the embodiments described herein, without departing from scope and spirit of the present invention.Together
Sample, for clarity and conciseness, descriptions of well-known functions and structures are omitted from the following description.
First embodiment
In the present embodiment, cooperated by the movable axis of variable diameter and a pair of oppositely arranged unilateral bearing to realize to piston
The locking of bar.Fig. 3 is structural schematic diagram of the needleless injector retaining mechanism in release conditions of first embodiment of the invention offer；
Fig. 4 is structural schematic diagram of the needleless injector retaining mechanism in locking state of first embodiment of the invention offer.
As shown, the needleless injector in the present embodiment includes sliding block 210, movable axis 220, the first unilateral bearing 231
With the second unilateral bearing 232.Movable axis 220 is set to by piston rod 240, and keeps turn with 240 fixed sleeves of piston rod dress
Wheel 241 is axial parallel, and certain space is reserved in the fixation hole at the both ends of movable axis 220, allows movable axis 220 along its axial direction
It is mobile.Gear 221 is provided on movable axis 220,241 outer surface of runner is provided with toothing, and in movable axis 220 along its axial direction
During round-trip, gear 221 and runner 241 remain meshing state.Sliding block 210 is close to the side of movable axis 220
It is provided with the groove 211 that can accommodate gear 221, therefore when sliding block 210 is mobile, it will drive movable axis 220 along its axial movement, and
Sliding block 210 will not hinder the rotation of movable axis 220.
Fig. 5 is the structural schematic diagram of movable axis in needleless injector retaining mechanism provided in an embodiment of the present invention.As schemed
Show, movable axis 220 straightens journal axle for one comprising two groups of releasing sections 223 and two groups of locking sections 222, the diameter A of releasing section 223
Less than the diameter B of locking section 222.One releasing section 223 and a locking section 222 are one group, are disposed adjacent, are additionally provided with therebetween
The changeover portion 224 of variable diameters makes the diameter of movable axis 220 smooth change between releasing section 223 and locking section 222；Two groups of releases
In section 223 and locking section 222, the setting sequence of releasing section 223 and locking section 222 is identical, and two groups of releasing sections 223 and locking section
Gear 221 is provided between 222, so that movable axis 220 be made to have such as " releasing section-locking section-gear-releasing section-locking
The structure of section ".
Movable axis 220 is set in two unilateral bearings, and the diameter of locking section 222 cooperates with the internal diameter of unilateral bearing just；
Two unilateral bearings are oppositely arranged, also, the distance between two unilateral bearings meet：When movable axis 220 is along its axial movement,
Two locking sections 222 on movable axis 220 are synchronized to enter in two unilateral bearings or synchronize and are detached from.
Under state shown in Fig. 3, the first unilateral bearing 231 and the second unilateral bearing 232 are coaxially fixed on movable axis 220
Side, two releasing sections 223 are located in the first unilateral bearing 231 and the second unilateral bearing 232, straight due to releasing section 223
Diameter is smaller, can not cooperate with unilateral bearing, therefore the movable axis 220 under the state still can be freely rotated, to will not limit
The rotation of runner 241 processed；Sliding block 210 is stirred to the right, is driven movable axis 220 to move right, is respectively enterd two locking sections 222
Cooperate in first unilateral bearing 231 and the second unilateral bearing 232 and with the two, state shown in Fig. 4 is gone to, due to the first one-way shaft
Hold 231 and second unilateral bearing 232 it is contrary, therefore the two combination can prevent movable axis 220 to any direction rotate,
Realize locking function.Also, it since during movable axis 220 moves, gear 221 is engaged with the holding of runner 241 always, keeps away
Runner 241 when locking is exempted from and additional rotation occurs, to ensure that liquid dose is accurate and there will not be air entrance.
It should be appreciated that movable axis, the first unilateral bearing, the quantity of the second unilateral bearing and arrangement side in the present embodiment
Formula is merely illustrative.As long as being provided at least two unilateral bearings, and wherein at least one unilateral bearing and other unilateral bearings
It is contrary, and to cooperate with these unilateral bearings with the movable axis of variable diameter, that is, it can reach same as the previously described embodiments or phase
Close locking effect.In addition, the position of movable axis gear is also that can change, such as can also be positioned close to movable axis
At both ends, if can guarantee movable axis along its axial movement when can either keep axis stablize, and may be implemented with unidirectionally
It the cooperation of bearing and is exited from unilateral bearing.Therefore, because have identical design element and mentality of designing, these variations
And other variations that do not mention should also be as being included within protection scope of the present invention.
Second embodiment
In the present embodiment, cooperated by the movable axis of variable diameter and ring set to realize the locking to piston rod.Fig. 6 is this hair
Structural schematic diagram of the needleless injector retaining mechanism that bright second embodiment provides in release conditions；Fig. 7 is that the present invention second is real
Structural schematic diagram of the needleless injector retaining mechanism in locking state of example offer is provided.
As shown, the present embodiment does not use unilateral bearing 231 and 232, but will on the basis of previous embodiment
They replace with the ring set 233 that two middle parts are provided with bellmouth；The maximum gauge in the upper conical hole of ring set 233 is not more than movable axis
The diameter of 220 locking section 222, and the minimum diameter of the bellmouth is not less than the diameter of releasing section 223.Therefore, such as Fig. 5 institute
Show, when releasing section 223 cooperates with ring set 233, movable axis 220 can be freely rotated；As shown in fig. 6, working as locking section 222 and ring
Set 233 cooperation after, the two mutual extrusion deformation, using between material elastic force and frictional force realize locking.
Due to the difference of fit system, it is real that the present embodiment middle ring sleeve 233 is slightly inferior to first to the locking effect of locking section 222
Unilateral bearing is applied in example to the locking effect of locking section 222；Under the influence of sharp pounding, locking section 222 is possible to from ring set
It is slipped in 233.In order to solve this problem, the positioning of ring around it is provided in the present embodiment in a locking section 222
Slot 252, and a positioning bead 251 is provided in the bellmouth of ring set 233 corresponding with the locking section 222；When locking section 222 is moved
It moving to when cooperating with ring set 233, positioning bead 251 fastens with locating slot 252, so that movable axis 220 is prevented to be axially moved,
It avoids locking section 222 to slip easily from ring set 233, improves the stability of locking.
Locking section 222 can design in the present embodiment for equal diameter, or variable diameters design；It is set using variable diameters
Timing, the contact area with ring set 233 can be bigger, can play more firm locking effect.
In the present embodiment, ring set may be replaced by other using elastic deformation to movable axis apply frictional force to realize
The structure of locking, such as claw etc..Releasing section, locking section and ring set also can be set one group or 2 groups or more.Positioning bead and fixed
Position slot also can be set in other positions, and the position of the two can also exchange, i.e., positioning bead is arranged on movable axis, and incite somebody to action
Locating slot is provided with the surface of bellmouth.Therefore, because having identical design element and mentality of designing, these change and it
The variation that he does not mention should also be as being included within protection scope of the present invention.
Above-mentioned specific embodiment, does not constitute a limitation on the scope of protection of the present invention.Those skilled in the art should be bright
It is white, design requirement and other factors are depended on, various modifications, combination, sub-portfolio and substitution can occur.It is any
Made modifications, equivalent substitutions and improvements etc. within the spirit and principles in the present invention, should be included in the scope of the present invention
Within.
Claims (9)
1. a kind of needleless injector retaining mechanism, which is characterized in that including sliding block (210), movable axis (220) and locking member；Institute
It states and is provided on movable axis (220) gear (221), be arranged on the gear (221) and syringe piston rod (240), surface
Runner (241) engagement with toothing；The sliding block (210) is for driving the movable axis (220) to move along its axis；When
When the movable axis (220) is moved to locking member cooperation, the locking member turns for limiting the movable axis (220)
It is dynamic.
2. retaining mechanism according to claim 1, which is characterized in that the movable axis (220) include locking section (222) and
Releasing section (223), the diameter of the locking section (222) are greater than the diameter of the releasing section (223)；When the locking section (222)
When cooperating with the locking member, the locking member limits the movable axis (220) for fixing the locking section (222) and turns
It is dynamic.
3. retaining mechanism according to claim 2, which is characterized in that the movable axis (220) is locked including at least two
Section (222), the locking member are corresponding with the locking section (222) and coaxial arrangement unilateral bearing, the movable axis (220)
It is set in the unilateral bearing；The diameter of the locking section (222) is identical as the internal diameter of the unilateral bearing, at least one institute
It states unilateral bearing and unilateral bearing described in other is oppositely arranged.
4. retaining mechanism according to claim 2, which is characterized in that the locking member is at least one ring set (233)；Institute
It states and is provided with bellmouth in the middle part of ring set (233), the minimum diameter of the bellmouth is not less than the diameter of the releasing section (223),
The maximum gauge of the bellmouth is not more than the diameter of the locking section (222)；The movable axis (220) is set in the ring set
(233) in.
5. retaining mechanism according to claim 2, which is characterized in that between the locking section (222) and releasing section (223)
It is provided with the changeover portion (224) of taper.
6. retaining mechanism according to claim 2, which is characterized in that the locking section (222) is tapered, and the locking
Diameter of the section (222) close to one end of corresponding locking member is less than the locking section (222) far from corresponding locking
The diameter of the other end of part.
7. retaining mechanism according to claim 2, which is characterized in that further include location structure, the location structure is used for
When the locking section (222) and the locking member cooperate, limits the movable axis (220) and be axially moveable.
8. retaining mechanism according to claim 7, which is characterized in that the positioning mechanism include positioning bead (251) and with
The locating slot (252) of positioning bead (251) the shape cooperation；Wherein,
The positioning bead (251) is set to the movable axis (220) side, and the locating slot (252) is set to the movable axis
(220) by space；Alternatively,
The locating slot (252) is set to the movable axis (220) side, and the positioning bead (251) is set to the movable axis
(220) by space.
9. a kind of needleless injector, which is characterized in that including syringe retaining mechanism described in claim 1-8 any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810911280.XA CN108853648B (en) | 2018-08-10 | 2018-08-10 | Needleless injector locking mechanism and needleless injector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810911280.XA CN108853648B (en) | 2018-08-10 | 2018-08-10 | Needleless injector locking mechanism and needleless injector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108853648A true CN108853648A (en) | 2018-11-23 |
| CN108853648B CN108853648B (en) | 2023-11-21 |
Family
ID=64317660
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810911280.XA Active CN108853648B (en) | 2018-08-10 | 2018-08-10 | Needleless injector locking mechanism and needleless injector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108853648B (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1197679A (en) * | 1996-09-19 | 1998-11-04 | 伊西康公司 | Controlled motion lock for safety catheter |
| KR100779908B1 (en) * | 2006-11-09 | 2007-11-29 | 주식회사 바이오넷 | Piston locking device for flunger pumping system |
| JP2013085911A (en) * | 2011-10-21 | 2013-05-13 | Create Medic Co Ltd | Syringe operating device |
| CN103550848A (en) * | 2013-11-18 | 2014-02-05 | 江西三鑫医疗科技有限公司 | Needle-free syringe |
| CN103732279A (en) * | 2011-08-02 | 2014-04-16 | 医用注射器公司 | Needle-free injection device |
| CN203749949U (en) * | 2014-01-23 | 2014-08-06 | 陆盘中 | Self-destructive disposable syringe |
| US20160199587A1 (en) * | 2013-09-03 | 2016-07-14 | Sanofi | Piston rod for a drug delivery device and drug delivery device comprising a piston rod |
| CN106219357A (en) * | 2016-07-22 | 2016-12-14 | 山东泰安煤矿机械有限公司 | The rope Locking device of well lifter suspension arrangement is erect for mine |
| CN106823072A (en) * | 2017-02-04 | 2017-06-13 | 王才丰 | The heavy dose of needleless injector that can independently get it filled |
| CN107812281A (en) * | 2017-11-17 | 2018-03-20 | 北京快舒尔医疗技术有限公司 | Needleless injector, needleless injector pencil and its piston rod |
| CN209286376U (en) * | 2018-08-10 | 2019-08-23 | 北京快舒尔医疗技术有限公司 | A kind of needleless injector retaining mechanism and needleless injector |
-
2018
- 2018-08-10 CN CN201810911280.XA patent/CN108853648B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1197679A (en) * | 1996-09-19 | 1998-11-04 | 伊西康公司 | Controlled motion lock for safety catheter |
| KR100779908B1 (en) * | 2006-11-09 | 2007-11-29 | 주식회사 바이오넷 | Piston locking device for flunger pumping system |
| CN103732279A (en) * | 2011-08-02 | 2014-04-16 | 医用注射器公司 | Needle-free injection device |
| JP2013085911A (en) * | 2011-10-21 | 2013-05-13 | Create Medic Co Ltd | Syringe operating device |
| US20160199587A1 (en) * | 2013-09-03 | 2016-07-14 | Sanofi | Piston rod for a drug delivery device and drug delivery device comprising a piston rod |
| CN103550848A (en) * | 2013-11-18 | 2014-02-05 | 江西三鑫医疗科技有限公司 | Needle-free syringe |
| CN203749949U (en) * | 2014-01-23 | 2014-08-06 | 陆盘中 | Self-destructive disposable syringe |
| CN106219357A (en) * | 2016-07-22 | 2016-12-14 | 山东泰安煤矿机械有限公司 | The rope Locking device of well lifter suspension arrangement is erect for mine |
| CN106823072A (en) * | 2017-02-04 | 2017-06-13 | 王才丰 | The heavy dose of needleless injector that can independently get it filled |
| CN107812281A (en) * | 2017-11-17 | 2018-03-20 | 北京快舒尔医疗技术有限公司 | Needleless injector, needleless injector pencil and its piston rod |
| CN209286376U (en) * | 2018-08-10 | 2019-08-23 | 北京快舒尔医疗技术有限公司 | A kind of needleless injector retaining mechanism and needleless injector |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108853648B (en) | 2023-11-21 |
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