CN115737992B - Needleless injector - Google Patents
Needleless injector Download PDFInfo
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- CN115737992B CN115737992B CN202211485914.2A CN202211485914A CN115737992B CN 115737992 B CN115737992 B CN 115737992B CN 202211485914 A CN202211485914 A CN 202211485914A CN 115737992 B CN115737992 B CN 115737992B
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- Prior art keywords
- impact
- piece
- stepped hole
- end cover
- hole
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- 238000004146 energy storage Methods 0.000 claims abstract description 49
- 238000002347 injection Methods 0.000 claims abstract description 34
- 239000007924 injection Substances 0.000 claims abstract description 34
- 239000007788 liquid Substances 0.000 claims abstract description 15
- 239000003814 drug Substances 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims description 9
- 239000000243 solution Substances 0.000 description 5
- 239000012530 fluid Substances 0.000 description 4
- NOESYZHRGYRDHS-UHFFFAOYSA-N insulin Chemical compound N1C(=O)C(NC(=O)C(CCC(N)=O)NC(=O)C(CCC(O)=O)NC(=O)C(C(C)C)NC(=O)C(NC(=O)CN)C(C)CC)CSSCC(C(NC(CO)C(=O)NC(CC(C)C)C(=O)NC(CC=2C=CC(O)=CC=2)C(=O)NC(CCC(N)=O)C(=O)NC(CC(C)C)C(=O)NC(CCC(O)=O)C(=O)NC(CC(N)=O)C(=O)NC(CC=2C=CC(O)=CC=2)C(=O)NC(CSSCC(NC(=O)C(C(C)C)NC(=O)C(CC(C)C)NC(=O)C(CC=2C=CC(O)=CC=2)NC(=O)C(CC(C)C)NC(=O)C(C)NC(=O)C(CCC(O)=O)NC(=O)C(C(C)C)NC(=O)C(CC(C)C)NC(=O)C(CC=2NC=NC=2)NC(=O)C(CO)NC(=O)CNC2=O)C(=O)NCC(=O)NC(CCC(O)=O)C(=O)NC(CCCNC(N)=N)C(=O)NCC(=O)NC(CC=3C=CC=CC=3)C(=O)NC(CC=3C=CC=CC=3)C(=O)NC(CC=3C=CC(O)=CC=3)C(=O)NC(C(C)O)C(=O)N3C(CCC3)C(=O)NC(CCCCN)C(=O)NC(C)C(O)=O)C(=O)NC(CC(N)=O)C(O)=O)=O)NC(=O)C(C(C)CC)NC(=O)C(CO)NC(=O)C(C(C)O)NC(=O)C1CSSCC2NC(=O)C(CC(C)C)NC(=O)C(NC(=O)C(CCC(N)=O)NC(=O)C(CC(N)=O)NC(=O)C(NC(=O)C(N)CC=1C=CC=CC=1)C(C)C)CC1=CN=CN1 NOESYZHRGYRDHS-UHFFFAOYSA-N 0.000 description 2
- 229930192334 Auxin Natural products 0.000 description 1
- 102000004877 Insulin Human genes 0.000 description 1
- 108090001061 Insulin Proteins 0.000 description 1
- 208000028990 Skin injury Diseases 0.000 description 1
- 239000002363 auxin Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- SEOVTRFCIGRIMH-UHFFFAOYSA-N indole-3-acetic acid Chemical compound C1=CC=C2C(CC(=O)O)=CNC2=C1 SEOVTRFCIGRIMH-UHFFFAOYSA-N 0.000 description 1
- 229940125396 insulin Drugs 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 229960005486 vaccine Drugs 0.000 description 1
Landscapes
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The invention relates to the technical field of needleless injection, and provides a needleless injector, which comprises: the two ends of the first shell are respectively provided with a first end cover and a second end cover, the first end cover is provided with a first stepped hole, and the second end cover is provided with a second stepped hole; the injection assembly is detachably connected with the first end cover and is provided with a first inner hole and a second inner hole which are communicated with each other, the first inner hole is used for accommodating liquid medicine, the second inner hole is communicated with the first stepped hole, and a piston is arranged in the second inner hole; the impact piece is arranged in the first shell, a space between the first stepped hole and the second stepped hole is a closed space, the impact piece is provided with a first boss, and the closed space is divided into a first cavity and a second cavity by the first boss; the energy storage component is connected with the second end cover; the movable piece can drive the impact piece to move together. According to the needleless injector, when the impact piece is in an impact state, the pressure in the two cavities tends to be balanced, and the kinetic energy of the impact piece is consumed, so that the impact feeling of the injection assembly on a human body is reduced.
Description
Technical Field
The invention relates to the technical field of needleless injection, in particular to a needleless injector.
Background
At present, insulin, auxin, vaccine and the like are injected in a needleless way, and the needleless injection does not need a needle to pierce the skin of a human body, so that skin injury is avoided. The needleless injection generally utilizes spring compression energy storage to provide injection power, and at the moment of injection, a certain impact can be generated on a patient due to the inertia effect of high-speed injection of a punch, so that the patient is shocked and frightened, and on the basis, the novel needleless injector is provided to become a trend.
Disclosure of Invention
The invention provides a needleless injector, which is used for solving the defect that the needleless injector in the prior art can generate larger impact on a patient during injection.
The present invention provides a needleless injector comprising: the device comprises a first shell, wherein a first end cover and a second end cover are respectively arranged at two ends of the first shell, the first end cover is provided with a first stepped hole, the second end cover is provided with a second stepped hole, and a large hole of the first stepped hole is opposite to a large hole of the second stepped hole; the injection assembly is detachably connected with the first end cover and is provided with a first inner hole and a second inner hole which are communicated with each other, the first inner hole is used for accommodating liquid medicine, the second inner hole is communicated with the first stepped hole, and a piston is arranged in the second inner hole; the first end of the impact piece penetrates through the first stepped hole, the second end of the impact piece penetrates through the second stepped hole, so that a space between the first stepped hole and the second stepped hole becomes a closed space, the impact piece is provided with a first boss, and the first boss is abutted to the inner wall of the first shell to divide the closed space into a first cavity and a second cavity; the energy storage component is connected with the second end cover; the movable piece is sleeved outside the first shell, the second end cover and the energy storage component, is in threaded connection with the first shell, can move linearly relative to the first shell, and drives the impact piece to move together in the moving process of moving away from the first shell; the impact piece is provided with a first state and a second state which can be switched, and is clamped with the energy storage component under the condition that the impact piece is in the first state; and under the condition that the impact piece is in the second state, the impact piece is separated from the energy storage component, and the impact piece is abutted with the piston so as to inject the liquid medicine into a human body.
According to the present invention there is provided a needleless injector, the impactor comprising: the first impact part is provided with the first boss, and the first end of the first impact part penetrates through the first stepped hole; the second impact part is connected with the second end of the first impact part, penetrates through the second stepped hole and extends out of the second end cover, and the second impact part can be clamped with the movable piece and the energy storage component.
According to the present invention there is provided a needleless injector, the second impact portion comprising: the first rod body is connected with the first impact part, and penetrates through the second stepped hole; the longitudinal section size of the second rod body is larger than the diameter of the small hole of the second stepped hole, and the surface, connected with the first rod body, of the second rod body can be clamped with the movable piece and the energy storage component.
According to the present invention there is provided a needleless injector, the energy storage assembly comprising: the bracket is connected with the second end cover, the bracket is provided with a groove, the groove is communicated with the second stepped hole, two opposite surfaces of the bracket are oppositely provided with first through holes, and the first through holes are communicated with the groove; the clamping parts are symmetrically arranged on two opposite surfaces of the support, clamping parts are arranged at the first ends of the clamping parts, and the clamping parts can penetrate through the first through holes and are clamped with the impact parts.
According to the present invention there is provided a needleless injector, the energy storage assembly further comprising: and when the second ends of the two clamping pieces are pressed relatively, the two first elastic pieces are compressed and contracted so that the two clamping parts move in a direction away from each other, and the clamping parts are separated from the impact piece.
According to the present invention there is provided a needleless injector further comprising a drive assembly comprising: a first driving member; the second driving piece is connected with the first driving piece, one end of the second driving piece, which is close to the clamping piece, is provided with a horn mouth, and under the action of external force, the first driving piece and the second driving piece can move towards the direction, which is close to the clamping piece, so that the second driving piece is abutted with the pair of clamping pieces and extrudes the clamping piece.
According to the present invention there is provided a needleless injector, the drive assembly further comprising: the second elastic piece is arranged between the first driving piece and the second driving piece, and the second elastic piece can drive the first driving piece and the second driving piece to move in a direction away from the clamping piece by utilizing self elastic force.
According to the present invention there is provided a needleless injector, the injection assembly comprising: the second shell is detachably connected with the first end cover and is provided with the first inner hole and the second inner hole; and the push rod is detachably connected with the impact piece, and is abutted with the piston under the condition that the impact piece is in the second state so as to inject the liquid medicine into a human body.
According to the needleless injector provided by the invention, the needleless injector further comprises a third elastic piece, wherein the third elastic piece is sleeved outside the first impact part and the part of the second impact part, which is positioned between the first boss and the second end cover.
According to the needleless injector provided by the invention, the inner wall of the movable piece is provided with the pair of second bosses, the two second bosses are oppositely arranged, and the second bosses can be clamped with the second rod body under the condition that the movable piece moves along the direction away from the first shell.
According to the needleless injector provided by the embodiment of the invention, the closed space is formed in the first shell, the first boss divides the closed space into the first cavity and the second cavity, when the impact piece is in the energy storage state, the pressure of the second cavity is far greater than that of the first cavity, the impact piece can obtain high-pressure and high-speed injection kinetic energy at the moment, when the impact piece is in the end section of the impact stroke, the pressure of the first cavity is greater than that of the second cavity until the kinetic energy of the impact piece is lost, the pressures in the last two cavities tend to be balanced, the impact of the injection component on a human body can be effectively buffered in the process, and the comfort level of the body feeling of a patient is improved.
Drawings
In order to more clearly illustrate the invention or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a cross-sectional view of a needleless injector provided by the present invention;
FIG. 2 is one of the cross-sectional views of the needleless injector provided by the present invention in an initial state;
FIG. 3 is a second cross-sectional view of the needleless injector provided by the present invention in an initial state;
FIG. 4 is one of the cross-sectional views of the needleless injector provided by the present invention in an energized state;
FIG. 5 is a second cross-sectional view of the needleless injector of the present invention in an energized state;
FIG. 6 is a cross-sectional view of the needleless injector after the movable member has been reset;
FIG. 7 is a cross-sectional view of the injection assembly shown in FIG. 1;
FIG. 8 is a third cross-sectional view of the needleless injector provided by the present invention in an initial state;
reference numerals:
10: a first housing; 11: a first end cap; 12: a second end cap; 20: a movable member; 30: an impact member; 31: a first impact portion; 32: a second impact portion; 40: an energy storage assembly; 41: a bracket; 42: a clamping piece; 43: a first elastic member; 50: an injection assembly; 51: a piston; 52: a second housing; 53: a push rod; 60: a drive assembly; 61: a first driving member; 62: a second driving member; 63: a second elastic member; 70: a third elastic member; 100: a first cavity; 111: a first stepped hole; 121: a second stepped hole; 200: a second cavity; 201: a second boss; 311: a first boss; 321: a first rod body; 322: a second rod body; 421: a clamping part; 501: a first bore; 502: a second bore.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The features of the invention "first", "second" and the like in the description and in the claims may be used for the explicit or implicit inclusion of one or more such features. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
The needleless injector of the present invention is described below in conjunction with fig. 1-8.
As shown in fig. 1, in an embodiment of the present invention, a needleless injector includes: the first housing 10, the first end cap 11, the second end cap 12, the moveable member 20, the impact member 30, the energy storage assembly 40, and the injection assembly 50.
The first end cover 11 and the second end cover 12 are respectively arranged at two ends of the first shell 10, the first end cover 11 is provided with a first stepped hole 111, the second end cover 12 is provided with a second stepped hole 121, and a large hole of the first stepped hole 111 is opposite to a large hole of the second stepped hole 121. The injection assembly 50 is detachably connected with the first end cover 11, the injection assembly 50 is provided with a first inner hole 501 and a second inner hole 502 which are communicated, the first inner hole 501 is used for containing liquid medicine, the second inner hole 502 is communicated with the first stepped hole 111, and a piston 51 is arranged in the second inner hole 502.
The impact member 30 is disposed in the first housing 10, a first end of the impact member 30 is disposed through the first stepped hole 111, a second end of the impact member 30 is disposed through the second stepped hole 121, so that a space between the first stepped hole 111 and the second stepped hole 121 is a closed space, the impact member 30 is provided with a first boss 311, and the first boss 311 abuts against an inner wall of the first housing 10 to divide the closed space into a first cavity 100 and a second cavity 200.
The energy storage component 40 is connected with the second end cover 12, the movable piece 20 is sleeved outside the first shell 10, the second end cover 12 and the energy storage component 40 and is in threaded connection with the first shell 10, and the movable piece 20 can move linearly relative to the first shell 10 and drive the impact piece 30 to move together in the process of moving away from the first shell 10; the impact member 30 has a first state and a second state that can be switched, and when the impact member 30 is in the first state, the impact member 30 is clamped with the energy storage assembly 40; when the impact member 30 is in the second state, the impact member 30 is separated from the energy storage assembly 40, and the impact member 30 abuts against the piston 51 to inject the medical fluid into the human body.
Specifically, in the present embodiment, the impact member 30 has two states, the first state is an energy storage state, at this time, the impact member 30 is engaged with the energy storage assembly 40, and the second state is an impact state, at this time, the impact member 30 is separated from the energy storage assembly 40, and the impact member 30 impacts the piston 51, so that the medical fluid is injected into the human body.
Specifically, the first end cover 11 and the second end cover 12 are respectively provided with a stepped hole, the large holes of the two stepped holes are oppositely arranged, and two ends of the impact piece 30 are respectively arranged in the first stepped hole 111 and the second stepped hole 121 in a penetrating manner and are abutted with the inner walls of the small holes of the two stepped holes, so that the space between the large holes of the two stepped holes becomes a closed space. The first boss 311 of the impingement member 30 is located within the enclosed space, thereby dividing the enclosed space into the first and second cavities 100 and 200. The movable part 20 is provided with internal threads, the first shell 10 is provided with external threads, when the movable part 20 is screwed, the movable part 20 can move along the direction away from the first shell 10, the inner wall of the movable part 20 is abutted with the impact part 30 in the moving process, and then the impact part 30 is driven to move together, so that the impact part 30 is clamped with the energy storage component 40. In the moving process of the impact member 30, the volume of the first cavity 100 increases, the air density in the first cavity 100 becomes smaller to generate suction force, the volume of the second cavity 200 becomes smaller, the air density in the second cavity becomes larger to be compressed to generate pressure, and at this time, the impact member 30 is in an energy storage state.
After the impact member 30 is engaged with the energy storage assembly 40, the movable member 20 is screwed in the opposite direction, so that the movable member 20 moves in a direction approaching the first housing 10 until the movable member 20 is reset. The injection assembly 50 is connected with the first end cover 11, the liquid medicine is placed into the first inner hole 501 of the injection assembly 50, then the energy storage assembly 40 is forced to separate the energy storage assembly 40 from the impact member 30, the impact member 30 impacts the piston 51, the piston 51 impacts the liquid medicine, and the liquid medicine is injected into a human body.
Further, after the energy storage assembly 40 is separated from the impact member 30, the impact member 30 moves in a direction approaching the piston 51, and during the movement of the impact member 30, the air density in the first cavity 100 becomes higher and returns to the normal atmospheric pressure, and the air density in the second cavity 200 becomes lower and also returns to the normal atmospheric pressure from the compressed state, so that the air pressures in the first cavity 100 and the second cavity 200 tend to be balanced, and the inertial kinetic energy of the impact member 30 is absorbed by the air in the first cavity 100 and the second cavity 200, thereby reducing the impact feeling of the injection assembly 50 on the human body.
According to the needleless injector provided by the embodiment of the invention, the closed space is formed in the first shell, the first boss divides the closed space into the first cavity and the second cavity, when the impact piece is in the energy storage state, the pressure of the second cavity is far greater than that of the first cavity, the impact piece can obtain high-pressure and high-speed injection kinetic energy at the moment, when the impact piece is in the end section of the impact stroke, the pressure of the first cavity is greater than that of the second cavity until the kinetic energy of the impact piece is lost, the pressures in the last two cavities tend to be balanced, the impact of the injection component on a human body can be effectively buffered in the process, and the comfort level of the body feeling of a patient is improved.
As shown in fig. 2 and 3, in the present embodiment, the impact member 30 includes: a first impact portion 31 and a second impact portion 32. The first impact portion 31 is provided with a first boss 311, a first end of the first impact portion 31 is penetrated through the first stepped hole 111, a second end of the first impact portion 31 is connected with the second impact portion 32, the second impact portion 32 penetrates through the second stepped hole 121 and extends out of the second end cover 12, and the second impact portion 32 can be clamped with the movable piece 20 and the energy storage assembly 40.
Specifically, the first impact portion 31 is provided with a first boss 311, two sides of the first boss 311 are connected with two rod bodies, one of the two rod bodies is penetrated in the first stepped hole 111, and the diameter of the rod body is matched with the small hole diameter of the first stepped hole 111 so as to seal one end of the first stepped hole 111; the other of the two rod bodies is connected with the second impact part 32, the second impact part 32 penetrates through the second stepped hole 121 and extends to the outside of the second end cover 12, the second impact part 32 penetrates through the part in the second stepped hole 121, and the diameter of the second impact part is matched with the small hole diameter of the second stepped hole 121 so as to seal one end of the second stepped hole 121, so that the space between the two stepped holes becomes a closed space.
Further, the second impact portion 32 can be engaged with the movable member 20 and the energy storage assembly 40. Specifically, the second impact portion 32 includes a first rod 321 and a second rod 322 that are connected, where the first rod 321 is connected to the first impact portion 31, and the first rod 321 penetrates through the second stepped hole 121, and the first rod 321 penetrates through a portion of the second stepped hole 121, where the diameter of the portion is matched with the diameter of the small hole of the second stepped hole 121. The second rod body 322 has a rectangular longitudinal cross-sectional shape, and the rectangular shape has a size larger than the diameter of the small hole of the second stepped hole 121, so that the second end cap 12 plays a role in limiting the movement of the second impact portion 32 in the impact state. The surface of the second rod body 322 connected with the first rod body 321 can be clamped with the movable piece 20 and the energy storage component 40.
Specifically, as shown in fig. 4 and 5, the inner wall of the movable member 20 is provided with a pair of second bosses 201, and the two second bosses 201 are disposed opposite to each other. The surface that second body of rod 322 and first body of rod 321 are connected is the rectangle, and under the circumstances that moving part 20 moves along the direction of keeping away from first casing 10, second boss 201 can with the both ends joint that this rectangle size is big, energy storage subassembly 40 can with the both ends joint that this rectangle size is little.
As shown in fig. 6, after the impact member 30 is engaged with the energy storage assembly 40, the impact member 30 is in an energy storage state, and the movable member 20 is twisted in the opposite direction, so that the movable member 20 moves in a direction approaching the first housing 10 until the movable member 20 is reset. The injection assembly 50 is then connected to the first end cap 11.
As shown in fig. 2, when the impact member 30 is in the initial state, the volume of the first chamber 100 is smaller than the volume of the second chamber 200. As shown in fig. 4, when the impact member 30 is in the energy storage state, the first chamber 100 increases in volume, the gas density becomes smaller to generate suction force, and the second chamber 200 decreases in volume, and the gas density becomes larger to generate pressure force. And after the impact member 30 is separated from the energy storage component 40, when the impact member 30 is in an impact state, the first cavity 100 is reduced in volume, the gas density is increased, the second cavity 200 is increased in volume, the gas density is reduced, and the pressures in the two cavities tend to be balanced, so that the impact kinetic energy of the impact member 30 is consumed, and the impact feeling of the injection component 50 on a human body is reduced.
As shown in fig. 2 and 4, in an embodiment of the present invention, the energy storage assembly 40 includes: a bracket 41 and a pair of snap-in members 42. The bracket 41 is connected with the second end cover 12, the bracket 41 is provided with a groove, the impact member 30 can move along the groove, two opposite surfaces of the bracket 41 are oppositely provided with first through holes, and the first through holes are communicated with the groove. The pair of clamping pieces 42 are symmetrically arranged on two opposite surfaces of the bracket 41, a clamping portion 421 is arranged at a first end of each clamping piece 42, and the clamping portion 421 can penetrate through the first through hole to be clamped with the impact piece 30.
Specifically, the bracket 41 includes two opposite bracket plates, the first ends of which are connected to the second end cap 12, the second ends of which are connected to each other, and a groove formed between the two bracket plates, the groove being in communication with the second stepped hole 121 of the second end cap 12, along which the second rod 322 of the second impact portion 32 is movable. The relative position of two mounting panels is equipped with first through-hole respectively, the one end of joint spare 42 and the second end swing joint of mounting panel are provided with joint portion 421 on the joint spare 42, joint portion 421 runs through first through-hole and extends to in the recess, when the second body of rod 322 of second impact portion 32 moves to joint portion 421, second body of rod 322 jack-up joint portion 421 to cross joint portion 421, after joint portion 421 is crossed to second body of rod 322, joint portion 421 falls down, and its part that extends to in the recess and the surface butt of second body of rod 322, thereby fix second body of rod 322, make impact member 30 be in energy storage state.
Further, in an embodiment of the present invention, the energy storage assembly 40 further includes a pair of first elastic members 43. Each first elastic member 43 is located between the second ends of the bracket 41 and the clamping members 42, and when the second ends of the two clamping members 42 are pressed relatively, the two first elastic members 43 are compressed and contracted to drive the two clamping portions 421 to move away from each other, so that the clamping portions 421 are separated from the impact member 30.
Specifically, as shown in fig. 1, a pair of first elastic members 43 are used to release the impact member 30. After the second rod body 322 of the second impact portion 32 is clamped with the clamping portion 421 of the clamping member 42, the second ends of the two clamping members 42 are pressed and contracted relatively, so that the second ends of the two clamping members 42 move in directions approaching each other, and further the first ends of the two clamping members 42 are driven to move in directions separating from each other, thereby separating the clamping portion 421 from the second rod body 322 of the second impact portion 32, and the impact member 30 is in an impact state and moves in directions approaching the injection assembly 50.
As shown in fig. 1 and 2, in an embodiment of the present invention, the needleless injector further comprises a drive assembly 60 comprising: a first driver 61 and a second driver 62. The second driving member 62 is connected to the first driving member 61, one end of the second driving member 62, which is close to the clamping member 42, is provided with a flare, and under the action of external force, the first driving member 61 and the second driving member 62 can move in a direction close to the clamping member 42, so that the second driving member 62 abuts against the pair of clamping members 42 and presses the clamping member 42.
Specifically, the second driving member 62 is provided with a flare at one end near the locking member 42, when the first driving member 61 is pushed, the first driving member 61 and the second driving member 62 move together in a direction near the locking member 42, the flare of the second driving member 62 abuts against the second end of the locking member 42 and presses the second end of the locking member 42, so that the locking member 42 presses the first elastic member 43 to compress and shrink the two first elastic members 43, the second ends of the two locking members 42 move in a direction near each other, and the first ends of the two locking members 42 are driven to move in a direction far away from each other, so that the locking portion 421 is separated from the second rod 322 of the second impact portion 32, the impact member 30 is in an impact state, and moves in a direction near the injection assembly 50.
Further, the driving assembly 60 further includes a second elastic member 63, where the second elastic member 63 is disposed between the first driving member 61 and the second driving member 62, and when the first driving member 61 and the second driving member 62 are pushed to move in a direction approaching the clamping member 42, the second elastic member 63 is compressed and contracted; when the impact member 30 is separated from the clamping member 42, the external force is removed, the second elastic member 63 is reset, and the self elastic force drives the first driving member 61 and the second driving member 62 to reset.
According to the needleless injector provided by the embodiment of the invention, the energy storage component and the driving component are arranged, so that the impact piece and the clamping piece are automatically separated, and when the impact piece is in an impact state, the driving component can be automatically reset, so that an additional resetting device is avoided, the structure of the needleless injector is simplified, and the needleless injector is convenient to carry.
As shown in fig. 7, in an embodiment of the present invention, an injection assembly 50 includes: a second housing 52 and a push rod 53. The second housing 52 is detachably connected to the first end cap 11, the second housing 52 is provided with a first inner hole 501 and a second inner hole 502, the push rod 53 is detachably connected to the impact member 30, and in the case that the impact member 30 is in the second state, the push rod 53 abuts against the piston 51 to inject the medical fluid into the human body.
Specifically, the second housing 52 is in threaded connection with the second end cover, the second housing 52 is provided with a first inner hole 501 and a second inner hole 502, the first inner hole 501 has a smaller diameter and is used for accommodating the liquid medicine, and the second inner hole 502 is internally provided with the piston 51. The second inner hole 502 communicates with the first stepped hole 111 of the first end cap 11, and when the striker 30 is in the striking state, the striker 30 drives the push rod 53 to move together in a direction approaching the piston 51, the push rod 53 strikes the piston 51, and the piston 51 injects the chemical liquid in the first inner hole 501 into the human body.
As shown in fig. 8, in an embodiment of the present invention, the needleless injector further comprises a third elastic member 70. The third elastic member 70 is sleeved outside the first impact portion 31 and the portion of the second impact portion 32 between the first boss 311 and the second end cover 12.
Specifically, when the movable member 20 drives the first boss 311 to move in a direction away from the first housing 10, the first boss 311 presses the third elastic member 70 to provide energy storage for the impact member 30, and when the impact member 30 is separated from the clamping member 42, the third elastic member 70 resets, so as to provide greater injection power for the impact member 30, and further improve the movement speed of the impact member 30 and the pushing member 53, so as to enhance the impact force of the piston 51 to impact the liquid medicine and enhance the injection force.
The following describes in detail the procedure of using the needleless injector provided by the present invention.
The movable piece 20 is screwed to enable the movable piece 20 to move in a direction away from the first shell 10, the second boss 201 of the movable piece 20 is abutted against the second rod body 322 of the second impact part 32 in the moving process of the movable piece 20, and then the second rod body 322 is driven to move together, after encountering the clamping piece 42, the clamping part 421 of the clamping piece 42 is jacked up, after the second rod body 322 passes through the clamping part 421, the clamping part 421 falls down to be clamped with the second rod body 322, and the impact piece 30 enters an energy storage state.
The movable member 20 is screwed in the opposite direction, and the movable member 20 moves in a direction approaching the first housing 10 until reset. The second housing 52 is connected to the first end cap 11, while the push rod 53 is connected to the first impact portion 31. The medical fluid is placed into the first bore 501 of the second housing 52.
The first driving member 61 and the second driving member 62 are pushed to move towards the direction approaching the clamping member 42, the second driving member 62 extrudes the second end of the clamping member 42, the first end of the clamping member 42 is driven to move towards the direction away from each other, the clamping portion 421 is further driven to be separated from the second rod body 322, the impact member 30 drives the push rod 53 to impact the piston 51, and the piston 51 injects the liquid medicine into a human body.
After the injection is completed, the second elastic member 63 is reset by using the self elastic force, so as to drive the second driving member 62 and the first driving member 61 to reset.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A needleless injector, comprising:
The device comprises a first shell, wherein a first end cover and a second end cover are respectively arranged at two ends of the first shell, the first end cover is provided with a first stepped hole, the second end cover is provided with a second stepped hole, and a large hole of the first stepped hole is opposite to a large hole of the second stepped hole;
the injection assembly is detachably connected with the first end cover and is provided with a first inner hole and a second inner hole which are communicated with each other, the first inner hole is used for accommodating liquid medicine, the second inner hole is communicated with the first stepped hole, and a piston is arranged in the second inner hole;
The first end of the impact piece penetrates through the first stepped hole, the second end of the impact piece penetrates through the second stepped hole, so that a space between the first stepped hole and the second stepped hole becomes a closed space, the impact piece is provided with a first boss, and the first boss is abutted to the inner wall of the first shell to divide the closed space into a first cavity and a second cavity;
the energy storage component is connected with the second end cover;
The movable piece is sleeved outside the first shell, the second end cover and the energy storage component, is in threaded connection with the first shell, can move linearly relative to the first shell, and drives the impact piece to move together in the moving process of moving away from the first shell;
The impact piece is provided with a first state and a second state which can be switched, and is clamped with the energy storage component under the condition that the impact piece is in the first state; and under the condition that the impact piece is in the second state, the impact piece is separated from the energy storage component, and the impact piece is abutted with the piston so as to inject the liquid medicine into a human body.
2. The needleless injector of claim 1, wherein the strike member comprises:
The first impact part is provided with the first boss, and the first end of the first impact part penetrates through the first stepped hole;
The second impact part is connected with the second end of the first impact part, penetrates through the second stepped hole and extends out of the second end cover, and the second impact part can be clamped with the movable piece and the energy storage component.
3. The needleless injector of claim 2, wherein the second impact portion comprises: the first rod body is connected with the first impact part, and penetrates through the second stepped hole;
The longitudinal section size of the second rod body is larger than the diameter of the small hole of the second stepped hole, and the surface, connected with the first rod body, of the second rod body can be clamped with the movable piece and the energy storage component.
4. The needleless injector of claim 1, wherein the energy storage assembly comprises:
the bracket is connected with the second end cover, the bracket is provided with a groove, the groove is communicated with the second stepped hole, two opposite surfaces of the bracket are oppositely provided with first through holes, and the first through holes are communicated with the groove;
the clamping parts are symmetrically arranged on two opposite surfaces of the support, clamping parts are arranged at the first ends of the clamping parts, and the clamping parts can penetrate through the first through holes and are clamped with the impact parts.
5. The needle free injector of claim 4, wherein the energy storage assembly further comprises:
and when the second ends of the two clamping pieces are pressed relatively, the two first elastic pieces are compressed and contracted so that the two clamping parts move in a direction away from each other, and the clamping parts are separated from the impact piece.
6. The needleless injector of claim 5, further comprising a drive assembly comprising:
A first driving member;
the second driving piece is connected with the first driving piece, one end of the second driving piece, which is close to the clamping piece, is provided with a horn mouth, and under the action of external force, the first driving piece and the second driving piece can move towards the direction, which is close to the clamping piece, so that the second driving piece is abutted with the pair of clamping pieces and extrudes the clamping piece.
7. The needleless injector of claim 6, wherein said drive assembly further comprises:
The second elastic piece is arranged between the first driving piece and the second driving piece, and the second elastic piece can drive the first driving piece and the second driving piece to move in a direction away from the clamping piece by utilizing self elastic force.
8. The needleless injector of claim 1, wherein the injection assembly comprises:
the second shell is detachably connected with the first end cover and is provided with the first inner hole and the second inner hole;
And the push rod is detachably connected with the impact piece, and is abutted with the piston under the condition that the impact piece is in the second state so as to inject the liquid medicine into a human body.
9. The needleless injector of claim 2, further comprising a third resilient member that is nested outside of the first impact portion and the portion of the second impact portion between the first boss and the second end cap.
10. A needleless injector as in claim 3, wherein the inner wall of the moveable member is provided with a pair of second bosses, the two second bosses being disposed opposite one another, the second bosses being engageable with the second shaft body upon movement of the moveable member in a direction away from the first housing.
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| CN202211485914.2A CN115737992B (en) | 2022-11-24 | 2022-11-24 | Needleless injector |
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| CN202211485914.2A CN115737992B (en) | 2022-11-24 | 2022-11-24 | Needleless injector |
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| CN115737992A CN115737992A (en) | 2023-03-07 |
| CN115737992B true CN115737992B (en) | 2024-06-07 |
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| US5383851A (en) * | 1992-07-24 | 1995-01-24 | Bioject Inc. | Needleless hypodermic injection device |
| JP2008086689A (en) * | 2006-10-05 | 2008-04-17 | Shimadzu Corp | Needleless syringe |
| CN203861699U (en) * | 2014-05-14 | 2014-10-08 | 苏州大学张家港工业技术研究院 | Manpower-driven energy storage type needleless injector |
| WO2015172683A1 (en) * | 2014-05-14 | 2015-11-19 | 苏州大学张家港工业技术研究院 | Manually operated energy storing needleless injector |
| CN210494792U (en) * | 2018-09-29 | 2020-05-12 | 广州承昱医疗投资管理有限公司 | A syringe for painless plastic |
| WO2021218108A1 (en) * | 2020-04-30 | 2021-11-04 | 北京快舒尔医疗技术有限公司 | Injection nozzle for needle-free injector, needle-free injector body, and needle-free injector |
| CN114984379A (en) * | 2022-05-18 | 2022-09-02 | 浙江工业大学 | High Pressure Driven Needleless Injection Device |
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2022
- 2022-11-24 CN CN202211485914.2A patent/CN115737992B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5383851A (en) * | 1992-07-24 | 1995-01-24 | Bioject Inc. | Needleless hypodermic injection device |
| JP2008086689A (en) * | 2006-10-05 | 2008-04-17 | Shimadzu Corp | Needleless syringe |
| CN203861699U (en) * | 2014-05-14 | 2014-10-08 | 苏州大学张家港工业技术研究院 | Manpower-driven energy storage type needleless injector |
| WO2015172683A1 (en) * | 2014-05-14 | 2015-11-19 | 苏州大学张家港工业技术研究院 | Manually operated energy storing needleless injector |
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| CN114984379A (en) * | 2022-05-18 | 2022-09-02 | 浙江工业大学 | High Pressure Driven Needleless Injection Device |
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|---|---|
| CN115737992A (en) | 2023-03-07 |
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