CN114870163A - Gas spring hybrid needleless injector - Google Patents
Gas spring hybrid needleless injector Download PDFInfo
- Publication number
- CN114870163A CN114870163A CN202210629799.5A CN202210629799A CN114870163A CN 114870163 A CN114870163 A CN 114870163A CN 202210629799 A CN202210629799 A CN 202210629799A CN 114870163 A CN114870163 A CN 114870163A
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- Prior art keywords
- outer sleeve
- liquid medicine
- gun body
- sleeve
- rear end
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- 239000003814 drug Substances 0.000 claims abstract description 101
- 239000007788 liquid Substances 0.000 claims abstract description 92
- 238000002347 injection Methods 0.000 claims abstract description 57
- 239000007924 injection Substances 0.000 claims abstract description 57
- 230000007246 mechanism Effects 0.000 claims abstract description 30
- 238000007789 sealing Methods 0.000 claims abstract description 14
- 230000002093 peripheral effect Effects 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 13
- 230000008569 process Effects 0.000 claims description 13
- 239000000126 substance Substances 0.000 claims description 12
- 230000009471 action Effects 0.000 claims description 3
- 238000004146 energy storage Methods 0.000 abstract description 16
- 230000002265 prevention Effects 0.000 description 9
- 230000000694 effects Effects 0.000 description 6
- 230000000149 penetrating effect Effects 0.000 description 6
- 210000001519 tissue Anatomy 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 206010033675 panniculitis Diseases 0.000 description 3
- 210000004304 subcutaneous tissue Anatomy 0.000 description 3
- 230000009977 dual effect Effects 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000001502 supplementing effect Effects 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000010999 medical injection Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
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- 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
- A61M5/20—Automatic syringes, e.g. with automatically actuated piston rod, with automatic needle injection, filling automatically
- A61M5/2033—Spring-loaded one-shot injectors with or without automatic needle insertion
-
- 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
- A61M5/20—Automatic syringes, e.g. with automatically actuated piston rod, with automatic needle injection, filling automatically
- A61M5/2053—Media being expelled from injector by pressurised fluid or vacuum
-
- 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
-
- 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
- A61M5/20—Automatic syringes, e.g. with automatically actuated piston rod, with automatic needle injection, filling automatically
- A61M2005/2026—Semi-automatic, e.g. user activated piston is assisted by additional source of energy
-
- 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
- A61M2005/3103—Leak prevention means for distal end of syringes, i.e. syringe end for mounting a needle
-
- 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
- A61M2005/3103—Leak prevention means for distal end of syringes, i.e. syringe end for mounting a needle
- A61M2005/3106—Plugs for syringes without needle
-
- 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
- A61M2205/00—General characteristics of the apparatus
- A61M2205/42—Reducing noise
Abstract
The invention discloses an air spring hybrid-action type needleless injector, which comprises a gun body, an outer sleeve, an injection head assembly, a liquid medicine rod, an inner sleeve, a push rod and a locking mechanism, wherein the outer sleeve is arranged in the gun body in a sliding manner, the injection head assembly is arranged at the front end part of the gun body and used for containing liquid medicine, the liquid medicine rod is arranged at the front end part of the outer sleeve and used for pushing the liquid medicine in the injection head assembly to be injected under the pushing of the outer sleeve, the inner sleeve is arranged in the outer sleeve in a sealing and sliding manner, the push rod is arranged in the inner sleeve in a sealing and sliding manner and provided with an air channel, the locking mechanism is used for locking the position of the outer sleeve relative to the gun body after the outer sleeve moves to a locking position towards the rear end part of the gun body, and an elastic element is arranged between the inner sleeve and the outer sleeve; the rear end part of the push rod is provided with a rear one-way valve, and the front end part of the inner sleeve is provided with a front one-way valve. The gas spring hybrid energy storage device takes gas spring hybrid motion as a power source, completes gas spring hybrid energy storage operation in a mode of compressing the elastic element and gas, performs needle-free injection by releasing hybrid energy stored by the gas spring, and is flexible to operate and convenient to use.
Description
Technical Field
The invention relates to the field of needleless injectors, in particular to an air spring hybrid type needleless injector.
Background
Along with rapid development of science and technology, needleless injectors are more and more highly regarded in medical treatment and epidemic prevention processes, and have wide application prospects, and needleless injection devices mainly utilize electric power to generate high-pressure gas through a high-pressure air pump to push a plunger on a piston to enable a liquid medicine rod in a liquid medicine cavity to extrude liquid medicine, and form high-speed and high-pressure jet flows under the flow increasing and pressurizing effects of the injectors and injection heads, so that a liquid medicine flow penetrates through the outer layer of skin to reach layers of subcutaneous tissue, intradermal tissue and the like to release the liquid medicine, and a medical injection device with a medication effect is formed; a needleless continuous injection device mainly converts energy stored by a gas cylinder and a storage battery into kinetic energy to control, compress and release the needleless injection device. In daily work, more than all, the injection process of the medicine can be continuously completed on the injected body by carrying an air compressor or carrying a heavy gas cylinder or a heavy battery, and the convenience of the injection operation is seriously influenced; the storage battery and the gas bottle have limited energy storage, so that equipment is frequently replaced, the labor intensity is increased, and the working efficiency is influenced; and the noise is big, still has the potential safety hazard scheduling problem of high pressure gas, power cord.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides the gas spring hybrid needleless injector, which takes gas spring hybrid action as a power source, completes gas spring hybrid energy storage operation in a mode of compressing an elastic element and gas, performs needleless injection by releasing hybrid energy accumulated by a gas spring, and has flexible operation and convenient use.
In order to solve the technical problems, the technical scheme of the invention is as follows: a gas spring mixing type needleless injector comprising:
a gun body;
the outer sleeve is slidably matched in the gun body;
the injection head assembly is arranged at the front end part of the gun body and is used for containing liquid medicine;
a liquid medicine rod which is arranged at the front end part of the outer sleeve and is used for pushing the liquid medicine in the injection head assembly to be injected under the pushing of the outer sleeve;
the inner sleeve is hermetically and slidably matched with the outer sleeve, an elastic element is arranged between the inner sleeve and the outer sleeve, the elastic element enables the inner sleeve to be tightly pressed against the rear end part of the gun body, and the outer sleeve is compressed by the outer sleeve in the process that the outer sleeve moves towards the rear end part of the gun body;
the push rod is hermetically and slidably matched in the inner sleeve and provided with a gas channel, the rear end part of the push rod is provided with a rear one-way valve, the front end part of the inner sleeve is provided with a front one-way valve, and external gas can enter a cavity formed by the outer sleeve and the inner sleeve through the rear one-way valve, the gas channel and the front one-way valve in sequence;
a locking mechanism for locking the position of the outer sleeve relative to the gun body after the outer sleeve is moved to a locked position toward the rear end of the gun body.
There is further provided a concrete structure of a lock mechanism, the lock mechanism including:
at least one shoulder arranged on the outer peripheral wall of the inner sleeve, wherein the shoulder extends out of the gun body;
at least one latch mounted on the housing for movement to a locked position for engagement with the shoulder.
Further provided is a specific structure of a gun body capable of controlling a reciprocating stroke of an outer sleeve to control a dosage of injected liquid medicine, the gun body comprising:
the outer sleeve is arranged in the gun main body in a sliding mode, an axial groove corresponding to the shoulder is formed in the peripheral wall of the rear end portion of the gun main body, and the shoulder penetrates through the axial groove and can slide along the axial groove;
and the inner sleeve enables the rear end face of the shoulder to tightly abut against the rear cover under the action of the elastic force of the elastic element.
Further in order to improve the overall strength between the rear cover and the gun body, the rear cover is in threaded connection with an external thread at the rear end part of the gun body through an internal thread; wherein the content of the first and second substances,
the inner end face of the internal thread of the rear cover is provided with an outer chamfer face, the rear end face of the gun main body is provided with an inner chamfer face, and the outer chamfer face abuts against the inner chamfer face.
Further, in order to prevent the locking mechanism from being unlocked by mistake and further avoid causing safety accidents, the gas spring hybrid needleless injector further comprises a safety sleeve which is sleeved on the gun body in a sliding mode and a limiting mechanism which is used for limiting the safety sleeve at a safety position so that the safety sleeve is abutted against the lock catch located at the locking position to prevent the lock catch from being separated from the shoulder.
Further, in order to eliminate air resistance pressure at the initial stage of energy storage and facilitate pressurization of the cavity at the later stage of energy storage, the peripheral wall of the outer sleeve is provided with at least one through hole; wherein the content of the first and second substances,
the through hole is located in front of the sealing assembly between the outer sleeve and the inner sleeve during the movement of the outer sleeve to the locked position toward the rear end of the gun body;
the through hole is located behind a sealing assembly between the outer sleeve and the inner sleeve during a rearward movement of the outer sleeve to a locked position toward the rear end of the gun body.
There is further provided a specific structure of an injection head assembly, the injection head assembly including:
the rear end part of the gun barrel is connected with the front end part of the gun body, a liquid medicine cavity for containing liquid medicine is formed in the rear end part of the gun barrel, and at least one part of the liquid medicine rod extends into the liquid medicine cavity;
the liquid medicine feeder is communicated with the liquid medicine cavity and is used for connecting a medicine bottle, and a liquid supply one-way mechanism for allowing the liquid medicine in the medicine bottle to enter the liquid medicine cavity is arranged in the liquid medicine feeder;
the injection head is arranged at the front end part of the gun barrel, and an injection one-way mechanism for allowing the liquid medicine in the liquid medicine cavity to enter the injection head is arranged between the liquid medicine cavity and the injection head.
Further, in order to prevent the injection head and the gun barrel from loosening and achieve the aim of leakage prevention, the injection head is in threaded connection with the internal thread at the front end of the gun barrel through the external thread; wherein the content of the first and second substances,
the outer peripheral wall of the injection head is provided with a first step circle, the rear end face of the first step circle and the front end face of the gun barrel are respectively provided with a first annular groove, a plurality of first retaining grooves are arranged in the first annular groove, and rubber anti-loosening rings are embedded in the space formed by splicing the two first annular grooves.
Further, in order to prevent the barrel and the gun body from loosening and achieve the purpose of leakage prevention, the barrel is in threaded connection with the internal thread at the front end part of the gun body through the external thread; wherein the content of the first and second substances,
the outer peripheral wall of the gun barrel is provided with a step circle II, the rear end face of the step circle II and the front end face of the gun body are respectively provided with an annular groove II, a plurality of backstop grooves II are arranged in the annular groove II, and rubber anti-loosening pads are embedded in the space formed by splicing the two annular grooves II.
Further, in order to reduce the movement resistance and noise during the axial movement, at least one guide ring is arranged between the gun body and the outer sleeve and/or between the outer sleeve and the inner sleeve and/or between the inner sleeve and the push rod.
After the technical scheme is adopted, the invention has the following beneficial effects:
1. when the outer sleeve moves towards the rear end of the gun body, the outer sleeve compresses the elastic element, a cavity formed by the outer sleeve and the inner sleeve is also extruded together to form air spring mixing energy storage, after the outer sleeve moves to a locking position, the locking mechanism locks the position of the outer sleeve relative to the gun body, air and spring dual energy storage is completed, when injection is needed, the locking of the outer sleeve by the locking mechanism is released, the energy stored by the elastic element and compressed air gathered in the cavity are released instantly, the outer sleeve is pushed, the outer sleeve pushes the liquid medicine rod, the liquid medicine rod extrudes liquid medicine in the injection head assembly, and the liquid medicine is injected at high speed and high pressure, so that the liquid medicine flows through the outer layer of the skin to reach the tissue layers of subcutaneous tissue, intradermal tissue and the like to release the liquid medicine, and the aim of needleless injection is achieved. The device is not influenced by the conditions of using the kinetic energy such as field electricity, electricity and the like, and has the advantages of energy conservation, environmental protection, wide regional use and flexibility of regional application;
2. if an injected body with a large month age is encountered in the injection process, the force generated by the energy storage of the elastic element is relatively constant under the condition of insufficient penetrating force required by the injection, at the moment, the push rod is pushed forwards according to different requirements, so that external gas sequentially passes through the rear one-way valve, the gas channel and the front one-way valve to enter a cavity body consisting of the outer sleeve and the inner sleeve, the air pressure intensity in the cavity body is increased, and the aim of supplementing the penetrating force required by penetrating different skin outer layers is fulfilled; the invention has the advantages of flexible operation and convenient use, enhances the application occasions and the application areas of the gas spring hybrid needleless injector, and has high use value;
3. the invention controls the position of the inner sleeve at the rear end part of the gun body by controlling the screwing-in amount of the rear cover, thereby controlling the distance of the reciprocating stroke of the outer sleeve, and the collision rod on the outer sleeve drives the liquid medicine rod to suck the medicine amount of the corresponding stroke, thereby achieving the purpose of controlling the injection liquid medicine dosage;
4. the rear cover and the gun main body are connected through the internal thread and the external thread to form a fastening fit, and the internal and external chamfer surfaces are abutted, so that the influence of the axial groove on the strength of the gun main body is compensated, and the overall strength of the structure is obviously improved;
5. in the process of using the gas spring mixing type needleless injector, when the suspension is needed, the condom moves backwards to the safety position, the safety sleeve is limited at the safety position through the limiting mechanism, the lock catch is propped against through the condom, the locking mechanism is prevented from being unlocked mistakenly, and further, safety accidents caused by the mistaken injection of liquid medicine are avoided.
6. The through hole arranged on the outer sleeve is beneficial to the elastic element to remove air resistance pressure at the initial stage of energy storage, the air resistance phenomenon generated when the outer sleeve moves relative to the inner sleeve is avoided, initial pressurization of a cavity formed by the inner sleeve and the outer sleeve is conveniently formed when the sealing ring at the front end of the inner sleeve exceeds the through hole, and the purpose of manually storing energy for gas is also achieved by pushing the push rod;
7. rubber anti-loose rings are arranged in two annular grooves I of the injection head and the gun barrel, and are used for preventing the threaded connection part of the injection head and the gun barrel from loosening, so that the backstop effect is formed, and the purposes of preventing loosening of components and preventing leakage of liquid medicine are achieved;
8. rubber anti-loose pads are arranged in two annular grooves of the gun barrel and the gun body, and are used for preventing the threaded connection part of the gun barrel and the gun body from loosening, so that the backstop effect is formed, and the purposes of component anti-loose and liquid medicine anti-leakage are achieved;
9. at least one guide ring is respectively arranged between the gun body and the outer sleeve, between the outer sleeve and the inner sleeve and between the inner sleeve and the push rod, so that the movement resistance and noise of the outer sleeve moving axially relative to the inner sleeve and the gun body and the push rod moving axially relative to the inner sleeve can be effectively reduced.
Drawings
FIG. 1 is a cross-sectional view of one embodiment of the gas spring hybrid needleless injector of the present invention;
FIG. 2 is a front elevational view of one embodiment of the gas spring hybrid needleless injector of the present invention;
FIG. 3 is an enlarged view of portion A of FIG. 1;
fig. 4 is a sectional view a-a of fig. 1.
Detailed Description
In order that the present invention may be more readily and clearly understood, a more particular description of the invention briefly described above will be rendered by reference to specific embodiments that are illustrated in the appended drawings.
As shown in fig. 1, 2, 3 and 4, a gas spring mixing type needleless injector comprises:
a gun body;
the outer sleeve 1 is slidably matched in the gun body;
an injection head assembly 2 which is arranged at the front end part of the gun body and is used for containing liquid medicine;
a liquid medicine rod 3 mounted at the front end of the outer sleeve 1 and used for pushing the liquid medicine in the injection head assembly 2 to be injected under the pushing of the outer sleeve 1;
the inner sleeve 4 is hermetically and slidably matched in the outer sleeve 1, an elastic element 5 is arranged between the inner sleeve 4 and the outer sleeve 1, the elastic element 5 enables the inner sleeve 4 to be tightly pressed against the rear end part of the gun body, and the outer sleeve 1 is compressed by the outer sleeve 1 in the process that the outer sleeve 1 moves towards the rear end part of the gun body;
the push rod 6 is hermetically and slidably matched in the inner sleeve 4 and is provided with a gas channel 61, the rear end part of the push rod 6 is provided with a rear one-way valve 62, the front end part of the inner sleeve 4 is provided with a front one-way valve 41, and external gas can enter a cavity formed by the outer sleeve 1 and the inner sleeve 4 through the rear one-way valve 62, the gas channel 61 and the front one-way valve 41 in sequence;
a locking mechanism for locking the position of the outer sleeve 1 relative to the gun body after the outer sleeve 1 is moved to a locked position toward the rear end of the gun body.
In the present embodiment, sealing components are provided between the inner sleeve 4 and the outer sleeve 1, and between the push rod 6 and the inner sleeve 4, and sealing rings may be used as the sealing components. The elastic element 5 may be a power spring.
In this embodiment, in order to facilitate pushing the push rod 6, a handle is mounted at a rear end of the push rod 6.
Specifically, in the process that the outer sleeve 1 moves towards the rear end part of the gun body, the outer sleeve 1 compresses the elastic element 5, a cavity formed by the outer sleeve 1 and the inner sleeve 4 is also extruded together to form air spring hybrid energy storage, after the outer sleeve 1 moves to a locking position, the locking mechanism locks the position of the outer sleeve 1 relative to the gun body, air and spring dual energy storage is completed, when injection is needed, the locking of the outer sleeve 1 by the locking mechanism is released, the energy stored by the elastic element 5 and compressed air accumulated in the cavity are released instantly, the outer sleeve 1 is pushed, the outer sleeve 1 pushes the liquid medicine rod 3, the liquid medicine rod 3 extrudes liquid medicine in the injection head component 2, the liquid medicine is injected at high speed and high pressure, so that the liquid medicine penetrates through the outer layer of the skin to reach tissue layers such as the subcutaneous tissue layer and the intradermal tissue layer to release the liquid medicine, and the aim of needle-free injection is achieved, the air spring hybrid needle-free injector of the invention can be operated repeatedly to store energy and release energy, the continuous needle-free injection is convenient to form, is not influenced by the kinetic energy conditions of using field electricity, gas and the like, and has the advantages of energy conservation, environmental protection, wide regional use and flexibility of regional application; in the process of injection, if an injected body with a large age of an individual month is encountered, under the condition of insufficient penetrating power required by injection, the force generated by the energy storage of the elastic element 5 is relatively constant, at the moment, the push rod 6 is pushed forwards according to different requirements, so that external gas sequentially passes through the rear one-way valve 62, the gas channel 61 and the front one-way valve 41 and enters a cavity consisting of the outer sleeve 1 and the inner sleeve 4, the air pressure intensity in the cavity is increased, and the purpose of supplementing the penetrating power required by penetrating different skin outer layers is achieved. The invention has the advantages of flexible operation and convenient use, enhances the application occasions and the application areas of the gas spring hybrid needleless injector and has high use value.
As shown in fig. 1 and 2, the locking mechanism includes:
at least one shoulder 71 arranged on the outer peripheral wall of the inner sleeve 4, wherein the shoulder 71 extends out of the gun body;
at least one catch 72 mounted on said jacket 1 and intended to snap-engage said shoulder 71 when moved to the locking position.
In this embodiment, the shoulder 71 and the latch 72 are provided with two pieces, respectively, but are not limited thereto.
As shown in fig. 1 and 2, in order to control the distance of the reciprocating stroke of the outer sleeve 1, so as to adjust the stroke of the liquid medicine rod 3 for completing the suction to the corresponding medicine amount, and further achieve the purpose of controlling the injection liquid medicine dosage, the gun body comprises:
the gun body 81 is slidably matched in the outer sleeve 1, an axial groove corresponding to the shoulder 71 is formed in the peripheral wall of the rear end part of the gun body 81, and the shoulder 71 penetrates through the axial groove and can slide along the axial groove;
a rear cover 82 screwed to the rear end of the gun body 81, and the inner sleeve 4 presses the rear end surface of the shoulder 71 against the rear cover 82 by the elastic force of the elastic member 5.
Specifically, the invention controls the position of the inner sleeve 4 at the rear end part of the gun body by controlling the screwing amount of the rear cover 82, thereby controlling the distance of the reciprocating stroke of the outer sleeve 1, and the striking rod on the outer sleeve 1 drives the liquid medicine rod 3 to suck the medicine amount of the corresponding stroke, thereby achieving the purpose of controlling the injection liquid medicine dosage.
As shown in fig. 1, in order to improve the overall strength between the rear cap 82 and the gun body 81, the rear cap 82 is screwed with the external thread of the rear end portion of the gun body 81 by its internal thread; wherein the content of the first and second substances,
the inner end face of the internal thread of the rear cover 82 is provided with an outer chamfer face, the rear end face of the gun body 81 is provided with an inner chamfer face, and the outer chamfer face abuts against the inner chamfer face.
In this embodiment, the inner chamfer surface and the outer chamfer surface are both 45 °.
Specifically, the rear cover 82 and the gun body 81 are connected through the internal thread and the external thread to form a fastening fit, and the internal and external chamfer surfaces are abutted to make up the influence of the axial groove on the strength of the gun body 81, so that the overall strength of the structure is obviously improved.
As shown in fig. 1, 2 and 4, in order to prevent the locking mechanism from being unlocked by mistake and further avoid causing a safety accident, the gas-spring mixing type needleless injector further comprises a safety sleeve 9 slidably fitted over the gun body and a limiting mechanism 91 for limiting the safety sleeve 9 to a safety position so that the safety sleeve 9 abuts against the lock catch 72 located at the locking position to prevent the lock catch 72 from being disengaged from the shoulder 71.
In this embodiment, the limiting mechanism 91 includes three spring plungers mounted on the safety sleeve 9, a positioning hole is provided at a position of the gun body located at the safety position, the spring plungers are embedded in the positioning hole when the safety sleeve 9 moves to the safety position, three positioning holes are provided at the periphery of the safety position of the gun body, and the number of the spring plungers is also three.
In this embodiment, in order to fix the position of the safety sleeve 9 without using the safety sleeve 9 and prevent the safety sleeve 9 from interfering with the operation of the gas spring mixing type needleless injector, a positioning hole is provided in the non-safety region of the gun body, and when the safety sleeve 9 is moved to fit the spring plunger into the positioning hole of the non-safety region, the safety sleeve 9 does not interfere with the operation of the gas spring mixing type needleless injector.
Specifically, in the process of using the gas spring mixing type needleless injector, when the suspension is needed, the safety sleeve 9 is moved backwards to the safety position, the safety sleeve 9 is limited at the safety position through the limiting mechanism, the lock catch 72 is abutted through the safety sleeve 9, the locking mechanism is prevented from being unlocked mistakenly, and the safety accident caused by the mistaken injection of the liquid medicine is avoided.
As shown in fig. 1, in order to eliminate the air resistance pressure at the initial stage of energy storage and facilitate the pressurization of the cavity at the later stage of energy storage, the peripheral wall of the outer sleeve 1 is provided with at least one through hole 11; wherein the content of the first and second substances,
the through hole 11 is located in front of the sealing assembly between the outer sleeve 1 and the inner sleeve 4 in the process before the outer sleeve 1 is moved to the locking position toward the rear end of the gun body;
the through hole 11 is located behind the sealing assembly between the outer sleeve 1 and the inner sleeve 4 in the rear process of the outer sleeve 1 moving to the locked position toward the rear end of the gun body.
Specifically, the through hole 11 formed in the outer sleeve 1 is beneficial to the elastic element 5 to remove air resistance pressure at the initial stage of energy storage, so that the air resistance phenomenon generated when the outer sleeve 1 moves relative to the inner sleeve 4 is avoided, the initial pressurization of a cavity formed by the inner sleeve 4 and the outer sleeve 1 is conveniently formed when a sealing ring at the front end of the inner sleeve 4 exceeds the through hole 11, and the purpose of manually storing energy in the gas by pushing the push rod 6 is also facilitated.
As shown in fig. 1, 2 and 3, the injector head assembly 2 includes:
the rear end of the gun barrel 21 is connected with the front end of the gun body, the rear end of the gun barrel 21 is provided with a liquid medicine cavity for containing liquid medicine, and at least one part of the liquid medicine rod 3 extends into the liquid medicine cavity;
a liquid medicine feeder 23 communicated with the liquid medicine cavity and used for connecting a medicine bottle 22, wherein a liquid supply one-way mechanism 24 for allowing the liquid medicine in the medicine bottle 22 to enter the liquid medicine cavity is installed in the liquid medicine feeder 23;
an injection head 25 is arranged at the front end of the gun tube 21, and an injection one-way mechanism 26 for allowing the liquid medicine in the liquid medicine cavity to enter the injection head 25 is arranged between the liquid medicine cavity and the injection head 25.
In this embodiment, the liquid medicine supplier 23 is screwed to the port of the barrel 21 by means of an external thread at the lower end thereof, an anti-leakage ring is provided between the liquid medicine supplier 23 and the port, and an external thread for screwing to the medicine bottle 22 is provided at the upper end of the liquid medicine supplier 23.
In this embodiment, liquid medicine pole 3 includes liquid medicine push rod and lance, the preceding tip of liquid medicine push rod stretches into in the barrel 21, and from the preceding cover in proper order has silica gel cover and sealing washer after to, the back tip of liquid medicine push rod is equipped with interior couple groove, the back tip of lance through its external screw thread with the internal thread threaded connection of the front end of overcoat 1, the preceding tip of lance is equipped with outer couple groove, the outer couple groove of lance with the interior couple groove of liquid medicine push rod is connected for lance and liquid medicine push rod become axial motion's same movable connection body, promptly liquid medicine pole 3.
As shown in fig. 1 and 3, in order to prevent the loosening between the syringe 25 and the barrel 21 for the purpose of leakage prevention, the syringe 25 is screwed with the internal thread of the front end of the barrel 21 by its external thread; wherein the content of the first and second substances,
the outer peripheral wall of the injection head 25 is provided with a first step circle, the rear end face of the first step circle and the front end face of the gun barrel 21 are respectively provided with a first annular groove, a plurality of first retaining grooves are arranged in the first annular groove, and a rubber anti-loosening ring 27 is embedded in a space formed by splicing the two first annular grooves.
In the present embodiment, the retaining grooves are equally arranged.
Specifically, rubber anti-loose rings 27 are installed in two annular grooves one of the injector 25 and the barrel 21, which are used for preventing the screw joint of the injector 25 and the barrel 21 from loosening, forming a backstop effect and achieving the purposes of component looseness prevention and liquid medicine leakage prevention.
As shown in fig. 1 and 3, in order to prevent the barrel 21 and the gun body from loosening and achieve leakage prevention, the barrel 21 is screwed with the internal thread of the front end of the gun body through the external thread; wherein the content of the first and second substances,
the outer peripheral wall of the gun barrel 21 is provided with a second step circle, the rear end face of the second step circle and the front end face of the gun body are respectively provided with a second annular groove, a plurality of second stopping grooves are arranged in the second annular groove, and a rubber anti-loosening pad 28 is embedded in a space formed by splicing the two second annular grooves.
In this embodiment, the retaining grooves are arranged in two halves. The barrel 21 is sleeved with a conical sleeve at the position behind the second step circle, the diameter of the outer conical surface of the conical sleeve is gradually reduced from front to back, and the outer conical surface of the conical sleeve is attached to the inner conical surface of the front end of the gun body, so that the requirements of looseness prevention and leakage prevention are further met.
Specifically, rubber anti-loose pads 28 are installed in two annular grooves of the barrel 21 and the gun body, and are used for preventing the threaded connection between the barrel 21 and the gun body from loosening, so as to form a backstop effect, and achieve the purposes of component anti-loose and liquid medicine anti-leakage.
As shown in fig. 1 and 3, in order to reduce the movement resistance and noise during the axial movement, at least one guide ring 10 is respectively arranged between the gun body and the outer sleeve 1, between the outer sleeve 1 and the inner sleeve 4, and between the inner sleeve 4 and the push rod 6.
In this embodiment, other guiding mechanisms may be used instead of the guide ring 10.
The above embodiments are described in further detail to solve the technical problems, technical solutions and advantages of the present invention, and it should be understood that the above embodiments are only examples of the present invention and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. An air spring mixing type needleless injector is characterized in that,
it includes:
a gun body;
a jacket (1) which is slidably arranged in the gun body;
an injection head component (2) which is arranged at the front end part of the gun body and is used for containing liquid medicine;
a liquid medicine rod (3) which is arranged at the front end part of the outer sleeve (1) and is used for pushing the liquid medicine in the injection head component (2) to inject under the pushing of the outer sleeve (1);
the inner sleeve (4) is hermetically and slidably matched in the outer sleeve (1), an elastic element (5) is arranged between the inner sleeve (4) and the outer sleeve (1), the elastic element (5) enables the inner sleeve (4) to be tightly abutted against the rear end part of the gun body, and the outer sleeve (1) is compressed by the outer sleeve (1) in the process that the outer sleeve (1) moves towards the rear end part of the gun body;
the push rod (6) is hermetically and slidably matched in the inner sleeve (4) and is provided with a gas channel (61), a rear one-way valve (62) is installed at the rear end part of the push rod (6), a front one-way valve (41) is installed at the front end part of the inner sleeve (4), and external gas can enter a cavity formed by the outer sleeve (1) and the inner sleeve (4) through the rear one-way valve (62), the gas channel (61) and the front one-way valve (41) in sequence;
a locking mechanism for locking the position of the outer sleeve (1) relative to the gun body after the outer sleeve (1) has been moved to a locked position towards the rear end of the gun body.
2. The gas spring mixing type needleless injector of claim 1,
the locking mechanism includes:
at least one shoulder (71) arranged on the outer peripheral wall of the inner sleeve (4), wherein the shoulder (71) extends out of the gun body;
at least one catch (72) mounted on the outer sleeve (1) and adapted to snap-fit with the shoulder (71) when moved to a locked position.
3. The gas spring mixing type needleless injector of claim 2,
the gun body includes:
the outer sleeve (1) is arranged in the gun main body (81) in a sliding mode, an axial groove corresponding to the shoulder (71) is formed in the peripheral wall of the rear end portion of the gun main body (81), and the shoulder (71) penetrates through the axial groove and can slide along the axial groove;
and the rear cover (82) is in threaded connection with the rear end part of the gun main body (81), and the inner sleeve (4) enables the rear end surface of the shoulder (71) to be tightly abutted against the rear cover (82) under the action of the elastic force of the elastic element (5).
4. The gas spring mixing type needleless injector of claim 3,
the rear cover (82) is in threaded connection with an external thread at the rear end of the gun body (81) through an internal thread thereof; wherein the content of the first and second substances,
the inner end face of the internal thread of the rear cover (82) is provided with an outer chamfer face, the rear end face of the gun main body (81) is provided with an inner chamfer face, and the outer chamfer face abuts against the inner chamfer face.
5. The gas spring mixing type needleless injector of claim 2,
the safety gun also comprises a safety sleeve (9) which is slidably sleeved on the gun body and a limiting mechanism (91) which is used for limiting the safety sleeve (9) at a safety position so that the safety sleeve (9) is abutted against the lock catch (72) at a locking position to prevent the lock catch (72) from being separated from the shoulder (71).
6. The gas spring mixing type needleless injector of claim 1,
the peripheral wall of the outer sleeve (1) is provided with at least one through hole (11); wherein the content of the first and second substances,
the through hole (11) is located before the sealing assembly between the outer sleeve (1) and the inner sleeve (4) during the movement of the outer sleeve (1) to the locked position towards the rear end of the gun body;
the through hole (11) is located behind the sealing assembly between the outer sleeve (1) and the inner sleeve (4) in the rear process of the outer sleeve (1) moving to the locked position towards the rear end of the gun body.
7. The gas spring mixing type needleless injector of claim 1,
the injection head assembly (2) comprises:
the rear end of the gun barrel (21) is connected with the front end of the gun body, a liquid medicine cavity for containing liquid medicine is formed in the rear end of the gun barrel (21), and at least one part of the liquid medicine rod (3) extends into the liquid medicine cavity;
a liquid medicine feeder (23) communicated with the liquid medicine cavity and used for connecting a medicine bottle (22), wherein a liquid supply one-way mechanism (24) used for allowing the liquid medicine in the medicine bottle (22) to enter the liquid medicine cavity is installed in the liquid medicine feeder (23);
an injection head (25) arranged at the front end part of the gun tube (21), and an injection one-way mechanism (26) used for allowing the liquid medicine in the liquid medicine cavity to enter the injection head (25) is arranged between the liquid medicine cavity and the injection head (25).
8. The gas spring mixing type needleless injector of claim 7,
the injection head (25) is in threaded connection with the internal thread at the front end of the gun barrel (21) through the external thread; wherein the content of the first and second substances,
the injection head is characterized in that the peripheral wall of the injection head (25) is provided with a first step circle, the rear end face of the first step circle and the front end face of the gun barrel (21) are respectively provided with a first annular groove, a plurality of first retaining grooves are arranged in the first annular groove, and rubber anti-loosening rings (27) are embedded in the space formed by splicing the two first annular grooves.
9. The gas spring mixing type needleless injector of claim 7,
the barrel (21) is in threaded connection with the internal thread at the front end of the gun body through the external thread; wherein the content of the first and second substances,
the outer peripheral wall of the gun barrel (21) is provided with a step circle II, the rear end face of the step circle II and the front end face of the gun body are respectively provided with an annular groove II, a plurality of backstop grooves II are arranged in the annular groove II, and a rubber anti-loosening pad (28) is embedded in a space formed by splicing the two annular grooves II.
10. The gas spring mixing type needleless injector of claim 1,
at least one guide ring (10) is arranged between the gun body and the outer sleeve (1) and/or between the outer sleeve (1) and the inner sleeve (4) and/or between the inner sleeve (4) and the push rod (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210629799.5A CN114870163B (en) | 2022-06-06 | 2022-06-06 | Air spring mixed needleless injector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210629799.5A CN114870163B (en) | 2022-06-06 | 2022-06-06 | Air spring mixed needleless injector |
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| Publication Number | Publication Date |
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| CN114870163A true CN114870163A (en) | 2022-08-09 |
| CN114870163B CN114870163B (en) | 2023-12-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210629799.5A Active CN114870163B (en) | 2022-06-06 | 2022-06-06 | Air spring mixed needleless injector |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115591055A (en) * | 2022-08-24 | 2023-01-13 | 江苏益明荣药医疗科技有限公司（Cn） | Differential needleless injector |
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| CN115591055A (en) * | 2022-08-24 | 2023-01-13 | 江苏益明荣药医疗科技有限公司（Cn） | Differential needleless injector |
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| Publication number | Publication date |
|---|---|
| CN114870163B (en) | 2023-12-19 |
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Effective date of registration: 20230525 Address after: Floor 8, Building 1, No. 22 Xiushui Road, Medical High tech Industrial Development Zone, Taizhou City, Jiangsu Province, 225300 Applicant after: Jiangsu Leju Pharmaceutical Technology Co.,Ltd. Address before: 225300 floor 8-9, building 1, No. 22, Xiushui Road, medical high tech Zone, Taizhou City, Jiangsu Province Applicant before: Jiangsu yimingrong pharmaceutical medical technology Co.,Ltd. |
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