CN113975544A - Needleless injector with adjustable injection dose - Google Patents
Needleless injector with adjustable injection dose Download PDFInfo
- Publication number
- CN113975544A CN113975544A CN202111235161.5A CN202111235161A CN113975544A CN 113975544 A CN113975544 A CN 113975544A CN 202111235161 A CN202111235161 A CN 202111235161A CN 113975544 A CN113975544 A CN 113975544A
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- barrel
- piston
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- 238000002347 injection Methods 0.000 title claims abstract description 100
- 239000007924 injection Substances 0.000 title claims abstract description 100
- 239000007788 liquid Substances 0.000 claims abstract description 59
- 239000003814 drug Substances 0.000 claims abstract description 56
- 230000007246 mechanism Effects 0.000 claims abstract description 34
- 238000004146 energy storage Methods 0.000 claims abstract description 6
- 230000000694 effects Effects 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 3
- 230000001737 promoting effect Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 description 5
- 230000002093 peripheral effect Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000000712 assembly Effects 0.000 description 3
- 238000000429 assembly Methods 0.000 description 3
- 239000013013 elastic material Substances 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 238000009527 percussion Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000007920 subcutaneous administration 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
- A61M5/3007—Syringes for injection by jet action, without needle, e.g. for use with replaceable ampoules or carpules with specially designed jet passages at the injector's distal end
-
- 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
- A61M5/31—Details
- A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
- A61M5/31565—Administration mechanisms, i.e. constructional features, modes of administering a dose
Abstract
The invention relates to the technical field of injectors, in particular to a needleless injector with adjustable injection dosage, which comprises a shell, a balance valve, a cylinder barrel arranged in the shell, a piston arranged in the cylinder barrel in a sliding way, an injection head component used for placing liquid medicine and a striker used for pushing the injection head component to inject, wherein the striker is fixedly connected with the front end of the piston, the front side and the rear side of a valve core of the balance valve are respectively provided with an energy storage cavity and a control cavity, the injection head component is arranged at the front end of the shell in an axially adjustable way, the shell is provided with a locking mechanism used for locking the injection head component, the cylinder barrel is internally provided with a second elastic element used for pushing the piston to reset after being fired, the injection head component is arranged on the shell in an adjustable position, so that the distance between the piston and the injection head component can be changed, and the design of pushing the piston to reset by combining the second elastic element is adopted, therefore, the injection dosage can be adjusted, and the injection device has the advantages of simple structure, low failure rate and long service life.
Description
Technical Field
The invention relates to the technical field of injectors, in particular to a needleless injector with adjustable injection dose.
Background
With the development of science and technology, China becomes one of the few countries capable of producing needleless injectors worldwide, and the high-pressure jet principle is mainly utilized to enable liquid medicine to form a thin liquid flow to instantly penetrate through the skin to reach the subcutaneous part, so that the medicine has the advantages of uniform liquid medicine diffusion, quick response time, high medicine absorption rate, small wound and the like;
in contrast, chinese patent application No. CN 202110240947.X discloses a needleless injector, which mainly comprises a balance valve, an energy storage chamber, a control chamber, a piston and a control valve, however, the piston is reset by gas after injection, and only can be applied to a single injection dose, and the injection dose cannot be adjusted.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: in order to solve the problem that the injection dosage cannot be adjusted due to the fact that the needleless injector in the prior art adopts gas for resetting, the needleless injector with the adjustable injection dosage is provided.
The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides an injection dose adjustable needleless injector, includes casing, balanced valve, sets up cylinder in the casing, slidable mounting piston in the cylinder, be used for placing the syringe subassembly of liquid medicine and be used for promoting the plunger that the syringe subassembly carries out the injection, the front end fixed connection of plunger and piston, both sides are provided with energy storage chamber and control chamber respectively around the case of balanced valve, and the case supports the rear end tip of cylinder under first elastic element's effect, the front end at the casing is installed to injection head subassembly axial adjustable, install the locking mechanism who is used for locking the injection head subassembly on the casing, dispose in the cylinder and be used for promoting its second elastic element that resets after the piston percussion.
The injection head assembly is arranged on the shell in an adjustable position in the scheme, so that the distance between the piston and the injection head assembly can be changed, and the design that the second elastic element pushes the piston to reset is combined, so that the injection dosage can be adjusted, and the injection device is simple in structure, low in failure rate and long in service life.
The present invention specifically provides two types of injector head assemblies:
one of the two types of injection head assemblies is: the injection head assembly comprises a barrel and an injection head fixed at the front end of the barrel, a push rod in transmission connection with a striker is arranged in the barrel in a sliding manner, an injection one-way mechanism is installed at the front end of the barrel, a liquid medicine cavity is formed between the injection one-way mechanism and the push rod in the barrel, the injection one-way mechanism is used for allowing liquid in the liquid medicine cavity to flow towards the injection head, a liquid inlet joint communicated with the liquid medicine cavity is installed on the barrel, and a liquid inlet one-way mechanism used for allowing liquid medicine at the inlet of the liquid inlet joint to flow towards the liquid medicine cavity is arranged at the liquid inlet joint;
the barrel is in threaded connection with the housing, and the locking mechanism is used for locking the barrel of the injection head assembly.
Further, locking mechanism includes lock nut and lock sleeve, the breach has on the periphery wall of lock sleeve, the breach extends to other end direction along the one end of lock sleeve, and the lock sleeve cover is established outside the rifle pipe, lock nut and casing threaded connection, and have in the lock nut by preceding to the interior inclined plane of outside slope backward, interior inclined plane contacts with the outer wall of lock sleeve.
Further, the outer periphery wall of the locking sleeve is provided with an outer inclined surface which is inclined outwards from front to back, and the inner inclined surface is in contact with the outer inclined surface.
Furthermore, a connecting sleeve is arranged between the impact rod and the push rod, one of the connecting sleeve and the push rod is fixedly connected with one end of the connecting sleeve, a second limiting bulge is arranged on the other one of the connecting sleeve and the push rod, a first limiting bulge is arranged at the other end of the connecting sleeve, the second limiting bulge is slidably arranged in the connecting sleeve, and the first limiting bulge is opposite to the second limiting bulge.
Furthermore, a plurality of long grooves are formed in the end, located on the first limiting protrusion, of the connecting sleeve at intervals along the circumferential direction of the connecting sleeve.
The other of the two types of injection head assemblies is: the injection head assembly comprises a medicine core and a push rod which is slidably arranged in the medicine core, the front end of the shell is in threaded connection with an adjusting sleeve, the push rod and the striker are both positioned in the adjusting sleeve and are opposite to each other, and the medicine core is fixedly connected with the adjusting sleeve; the locking mechanism is used for locking the adjusting sleeve.
Further, locking mechanism includes lock nut and lock sleeve, the breach has on the periphery wall of lock sleeve, the breach extends to other end direction along the one end of lock sleeve, and the lock sleeve cover is established outside the adjusting collar, lock nut and casing threaded connection, and have in the lock nut by preceding to the interior inclined plane of outside slope backward, interior inclined plane contacts with the outer wall of lock sleeve.
Further, the outer periphery wall of the locking sleeve is provided with an outer inclined surface which is inclined outwards from front to back, and the inner inclined surface is in contact with the outer inclined surface.
Further, the second elastic element is a spring, one end of the second elastic element abuts against the shell, and the other end of the second elastic element abuts against the front end of the piston.
The invention has the beneficial effects that: the needle-free injector with the adjustable injection dose has the advantages that the injection head component is arranged on the shell in an adjustable position, so that the distance between the piston and the injection head component can be changed, and the design that the second elastic element pushes the piston to reset is combined, so that the adjustment of the injection dose can be realized, and the needle-free injector is simple in structure, low in failure rate and long in service life.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a front view of the needleless injector of embodiment 1 in which the injection dose is adjustable;
FIG. 2 is a cross-sectional view of the needleless injector of embodiment 1 in which the injection dose is adjustable;
fig. 3 is a partially enlarged view of a portion a in fig. 2;
FIG. 4 is a schematic view showing the plunger, the push rod and the coupling sleeve in accordance with embodiment 1;
fig. 5 is a three-dimensional view of the connecting sleeve in embodiment 1;
FIG. 6 is a three-dimensional view of a locking sleeve in embodiment 1;
FIG. 7 is a three-dimensional view of the needleless injector of embodiment 2 in which the injection dose is adjustable;
FIG. 8 is a cross-sectional view of the needleless injector of embodiment 2 in which the injection dose is adjustable;
fig. 9 is a partially enlarged view of a portion B in fig. 8;
in the figure: 1. the injection device comprises a shell, 2, a balance valve, 201, a valve core, 202, a first elastic element, 3, a cylinder barrel, 4, a piston, 5, an injection head assembly, 6, a ram, 6-1, a second limiting bulge, 7, an energy storage cavity, 8, a control cavity, 9, a gun barrel, 10, an injection head, 11, a push rod, 12, an injection one-way mechanism, 13, a liquid medicine cavity, 14, a liquid inlet joint, 15 and a liquid inlet one-way mechanism;
16. 16-1 parts of locking nuts, 17-1 parts of inner inclined planes, 17 parts of locking sleeves, 17-1 parts of outer inclined planes, 17-2 parts of notches, 18 parts of connecting sleeves, 18-1 parts of first limiting bulges, 18-2 parts of elongated slots, 19 parts of medicine cores, 20 parts of adjusting sleeves, 21 parts of second elastic elements.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic diagrams illustrating the basic structure of the present invention only in a schematic manner, and thus show only the constitution related to the present invention, and directions and references (e.g., upper, lower, left, right, etc.) may be used only to help the description of the features in the drawings. The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of the claimed subject matter is defined only by the appended claims and equivalents thereof.
Example 1
As shown in fig. 1-6, a needleless injector with adjustable injection dosage comprises a housing 1, a balance valve 2, a cylinder 3 arranged in the housing 1, a piston 4 slidably mounted in the cylinder 3, an injection head assembly 5 for placing liquid medicine, and a plunger 6 for pushing the injection head assembly 5 to inject, the ram 6 is fixedly connected with the front end of the piston 4, specifically, can be fixedly connected by threads, the front side and the rear side of the valve core 201 of the balance valve 2 are respectively provided with an energy storage cavity 7 and a control cavity 8, and the spool 201 is urged against the rear end portion of the cylinder 3 by the first elastic member 202, the injection head assembly 5 is axially and adjustably arranged at the front end of the shell 1, a locking mechanism for locking the injection head assembly 5 is arranged on the shell 1, a second elastic element 21 for pushing the piston 4 to reset after being fired is arranged in the cylinder 3.
The second elastic element 21 is a spring, and one end of the second elastic element 21 abuts against the housing 1, and the other end abuts against the front end of the piston 4.
The injection head assembly 5 comprises a barrel 9 and an injection head 10 fixed at the front end of the barrel 9, a push rod 11 in transmission connection with the striker 6 is arranged in the barrel 9 in a sliding manner, an injection one-way mechanism 12 is installed at the front end of the barrel 9, the barrel) is internally provided with a liquid medicine cavity 13 formed between the injection one-way mechanism 12 and the push rod 11, the injection one-way mechanism 12 is used for allowing liquid in the liquid medicine cavity 13 to flow towards the injection head 10, a liquid inlet joint 14 communicated with the liquid medicine cavity 13 is installed on the barrel 9, and a liquid inlet one-way mechanism 15 used for allowing liquid medicine at the inlet of the liquid inlet joint 14 to flow towards the liquid medicine cavity 13 is arranged at the liquid inlet joint 14; in the embodiment, the injection one-way mechanism 12 and the liquid inlet one-way mechanism 15 can adopt one-way valves;
the barrel 9 is in threaded connection with the housing 1 and the locking mechanism is used to lock the barrel 9 of the injection head assembly 5.
The locking mechanism comprises a locking nut 16 and a locking sleeve 17, wherein a notch 17-2 is formed in the outer peripheral wall of the locking sleeve 17, and the notch 17-2 extends along the direction from one end of the locking sleeve 17 to the other end; the locking sleeve 17 is sleeved outside the barrel 9, the locking nut 16 is in threaded connection with the shell 1, an inner inclined surface 16-1 which is inclined outwards from front to back is arranged in the locking nut 16, and the inner inclined surface 16-1 is in contact with the outer wall of the locking sleeve 17; when the locking nut 16 is screwed on the shell 1, the inner inclined surface 16-1 of the locking nut 16 abuts against the locking sleeve 17, so that the locking sleeve 17 embraces the gun barrel 9 to prevent the gun barrel 9 from loosening in the firing process of the piston 4; the material of the locking sleeve 17 is elastic material, such as plastic.
The outer peripheral wall of the locking sleeve 17 is provided with an outer inclined surface 17-1 which is inclined outwards from front to back, and the inner inclined surface 16-1 is in contact with the outer inclined surface 17-1; thereby the barrel 9 can be better locked to ensure the smooth completion of the injection.
A connecting sleeve 18 is arranged between the striker 6 and the push rod 11, one of the connecting sleeve 18 and the push rod 11 is fixedly connected with one end of the connecting sleeve 18, the other one is provided with a second limiting bulge 6-1, the other end of the connecting sleeve 18 is provided with a first limiting bulge 18-1, the second limiting bulge 6-1 is slidably arranged in the connecting sleeve 18, and the first limiting bulge 18-1 is opposite to the second limiting bulge 6-1; namely, the connecting sleeve 18 has two mounting modes;
the first one is: a connecting sleeve 18 is arranged between the striker 6 and the push rod 11, the connecting sleeve 18 is fixedly connected with the push rod 11, a first limiting bulge 18-1 is arranged at the rear end inside the connecting sleeve 18, a second limiting bulge 6-1 is arranged at the front end of the striker 6, the second limiting bulge 6-1 is slidably installed in the connecting sleeve 18, and the first limiting bulge 18-1 is opposite to the second limiting bulge 6-1; the arrangement of the connecting sleeve 18 enables the rear end part of the push rod 11 and the front end part of the striker 6 to form a certain impact distance, so that the injection effect of the liquid medicine is improved, and when the piston 4 is reset, only when the striker 6 moves backwards to the first limiting bulge 18-1 and the second limiting bulge 6-1 to be contacted, the connecting sleeve 18 and the push rod 11 move backwards together with the striker 6, so that the constant impact distance of the striker 6 is ensured.
The second method is as follows: a connecting sleeve 18 is arranged between the striker 6 and the push rod 11, the connecting sleeve 18 is fixedly connected with the striker 6, a first limiting bulge 18-1 is arranged at the front end inside the connecting sleeve 18, a second limiting bulge 6-1 is arranged at the rear end of the push rod 11, the second limiting bulge 6-1 is slidably arranged in the connecting sleeve 18, and the first limiting bulge 18-1 is opposite to the second limiting bulge 6-1; the arrangement of the connecting sleeve 18 enables the rear end part of the push rod 11 and the front end part of the striker 6 to form a certain impact distance, so that the injection effect of the liquid medicine is improved, and when the piston 4 is reset, only when the striker 6 moves backwards to the first limiting bulge 18-1 and the second limiting bulge 6-1 to be contacted, the connecting sleeve 18 and the push rod 11 move backwards together with the striker 6, so that the constant impact distance of the striker 6 is ensured.
In the embodiment, scales can be arranged outside the gun barrel 9 so as to accurately adjust the single injection dosage;
the rear end of the connecting sleeve 18 is provided with a plurality of long grooves 18-2 at intervals along the circumferential direction, so that the connecting sleeve 18 has certain elasticity at the position between two adjacent long grooves 18-2, and the second limiting bulge 6-1 of the plunger 6 is conveniently arranged in the connecting sleeve 18; the connecting sleeve 18 is made of an elastic material such as plastic, and further, nylon may be used.
The firing principle of the piston 4 in this embodiment is described in detail in a needleless injector disclosed in chinese patent application No. 202110240947.X, for this reason, this embodiment is not described again, and relatively speaking, the reset cavity is omitted in this embodiment, and the piston 4 is reset by a spring;
the injection head assembly 5 in this embodiment can realize continuous injection and can also realize that the injection dosage is adjustable, and specifically is:
before injection, the distance between the rear end of the gun tube 9 and the front end of the piston 4 is changed by rotating the gun tube 9, the larger the distance between the rear end of the gun tube 9 and the front end of the piston 4 is, the larger the stroke of the piston 4 is, and the more liquid medicine is in the liquid medicine cavity 13; the smaller the distance between the rear end of the gun barrel 9 and the front end of the piston 4 is, the smaller the stroke of the piston 4 is, and the less the liquid medicine is in the liquid medicine cavity 13, so that the adjustment of the injection dosage is realized, namely when the piston 4 moves forwards to be in contact with the gun barrel 9, one-time injection can be completed; after the position of the barrel 9 is adjusted, the lock nut 16 is tightened.
During injection, the liquid inlet joint 14 is communicated with a container storing liquid medicine to be injected, the piston 4 pushes the ram 6, the ram 6 moves forwards by one end to impact distance, the push rod 11 is driven, the liquid in the liquid medicine cavity 13 is pushed by the push rod 11 to pass through the injection one-way mechanism 12 and be ejected from the injection head 10 at high speed to form high-speed jet flow, and the piston 4 stops moving when the step of the ram 6 is contacted with the rear end of the barrel 9 to finish injection; the second elastic element 21 is compressed to store energy in the injection process, so that after injection, the second elastic element 21 pushes the piston 4 to reset backwards, the push rod 11 moves backwards along with the piston, and liquid is sucked from the liquid inlet one-way mechanism 15 to enter the liquid medicine cavity 13 in the resetting process, so that preparation is made for the next injection, and multiple injections can be continuously performed.
Example 2
As shown in fig. 7 to 9, example 2 differs from example 1 in that: the injection head assembly 5 comprises a medicine core 19 and a push rod 11 which is slidably installed in the medicine core 19, the front end of the shell 1 is in threaded connection with an adjusting sleeve 20, the push rod 11 and the striker 6 are both positioned in the adjusting sleeve 20 and are opposite to each other to form an impact distance, and the medicine core 19 is fixedly connected with the adjusting sleeve 20; the locking mechanism is used for locking the adjusting sleeve 20.
In this embodiment, the adjustment sleeve 20 may be provided with a scale to facilitate accurate adjustment of the single injection dose.
The locking mechanism comprises a locking nut 16 and a locking sleeve 17, a notch 17-2 is formed in the peripheral wall of the locking sleeve 17, the notch 17-2 extends along the direction from one end of the locking sleeve 17 to the other end of the locking sleeve, the locking sleeve 17 is sleeved outside an adjusting sleeve 20, the locking nut 16 is in threaded connection with the shell 1, an inner inclined surface 16-1 which is inclined outwards from front to back is formed in the locking nut 16, and the inner inclined surface 16-1 is in contact with the outer wall of the locking sleeve 17.
The outer peripheral wall of the locking sleeve 17 is provided with an outer inclined surface 17-1 which is inclined outwards from front to back, and the inner inclined surface 16-1 is in contact with the outer inclined surface 17-1.
In this embodiment, the length of the adjusting sleeve 20 extending into the cylinder 3 is changed according to the dosage of the liquid medicine in the medicine core 19 before injection; the more the liquid medicine in the medicine core 19, the more the push rod 11 in the medicine core 19 is located at the back, the less the liquid medicine in the medicine core 19 is located, and the more the push rod 11 in the medicine core 19 is located at the front;
before injection, the distance between the rear end of the adjusting sleeve 20 and the front end of the piston 4 is changed according to the current dosage of the liquid medicine in the medicine core 19, so that the impact distance between the push rod 11 and the striker 6 of the medicine core 19 is kept constant; after the position of the adjusting sleeve 20 is adjusted, the lock nut 16 is tightened.
During injection, the piston 4 pushes the ram 6, the ram 6 moves forwards by an impact distance, the push rod 11 is driven, the liquid in the medicine core 19 is pushed by the push rod 11 and is ejected from the front end of the medicine core 19 at a high speed to form high-speed jet flow, and the injection is finished; wherein, the second elastic element 21 is compressed and stored energy during the injection process, therefore, after the injection, the second elastic element 21 pushes the piston 4 to reset, and the push rod 11 moves backwards along with the piston to complete the reset.
In light of the foregoing description of the preferred embodiment of the present invention, it is to be understood that numerous changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (10)
1. The utility model provides an injection dose adjustable needleless injector, includes casing (1), balanced valve (2), sets up cylinder (3) in casing (1), slidable mounting piston (4) in cylinder (3), injection head subassembly (5) that are used for placing the liquid medicine and be used for promoting injection head subassembly (5) lance (6) that carry out the injection, front end fixed connection of lance (6) and piston (4), both sides are provided with energy storage chamber (7) and control chamber (8) respectively around case (201) of balanced valve (2), and case (201) support the rear end tip of cylinder (3) under the effect of first elastic element (202), its characterized in that: the injection head component (5) is axially and adjustably mounted at the front end of the shell (1), a locking mechanism for locking the injection head component (5) is mounted on the shell (1), and a second elastic element (21) for pushing the piston (4) to reset after being fired is arranged in the cylinder barrel (3).
2. The needleless injector of claim 1, wherein: the injection head component (5) comprises a barrel (9) and an injection head (10) fixed at the front end of the barrel (9), a push rod (11) in transmission connection with a ram (6) is arranged in the barrel (9) in a sliding mode, an injection one-way mechanism (12) is installed at the front end of the barrel (9), a liquid medicine cavity (13) is formed between the injection one-way mechanism (12) and the push rod (11) in the barrel (9), the injection one-way mechanism (12) is used for allowing liquid in the liquid medicine cavity (13) to flow towards the injection head (10), a liquid inlet connector (14) communicated with the liquid medicine cavity (13) is installed on the barrel (9), and a liquid inlet one-way mechanism (15) used for allowing liquid medicine at the inlet of the liquid inlet connector (14) to flow into the liquid medicine cavity (13) is arranged at the position of the liquid inlet connector (14);
the barrel (9) is in threaded connection with the shell (1), and the locking mechanism is used for locking the barrel (9) of the injection head assembly (5).
3. The needleless injector of claim 2, wherein: locking mechanism includes lock nut (16) and lock sleeve (17), breach (17-2) have on the periphery wall of lock sleeve (17), one end to other end direction extension along lock sleeve (17) is gone up in breach (17-2), and lock sleeve (17) cover is established outside barrel (9), lock nut (16) and casing (1) threaded connection, and have in lock nut (16) by preceding interior inclined plane (16-1) to the outer slope of back, interior inclined plane (16-1) and the outer wall contact of lock sleeve (17).
4. The needleless injector of claim 3, wherein: the outer periphery wall of the locking sleeve (17) is provided with an outer inclined surface (17-1) which is inclined outwards from front to back, and the inner inclined surface (16-1) is in contact with the outer inclined surface (17-1).
5. The needleless injector of claim 3, wherein: be equipped with adapter sleeve (18) between lance (6) and push rod (11), one of adapter sleeve (18) and push rod (11) and the one end fixed connection of adapter sleeve (18) are equipped with spacing arch of second (6-1) on the other, the other end of adapter sleeve (18) is equipped with first spacing arch (18-1), spacing arch of second (6-1) slidable mounting is in adapter sleeve (18), spacing arch of first (18-1) and spacing arch of second (6-1) opposition.
6. The needleless injector of claim 5, wherein: the end of the connecting sleeve (18) located at the first limiting bulge (18-1) is provided with a plurality of long grooves (18-2) at intervals along the circumferential direction.
7. The needleless injector of claim 1, wherein: the injection head assembly (5) comprises a medicine core (19) and a push rod (11) which is slidably mounted in the medicine core (19), the front end of the shell (1) is in threaded connection with an adjusting sleeve (20), the push rod (11) and the striker (6) are both positioned in the adjusting sleeve (20) and are opposite to each other, and the medicine core (19) is fixedly connected with the adjusting sleeve (20); the locking mechanism is used for adjusting the sleeve (20).
8. The needleless injector of claim 7, wherein: locking mechanism includes lock nut (16) and lock sleeve (17), breach (17-2) have on the periphery wall of lock sleeve (17), one end to other end direction extension along lock sleeve (17) is gone up in breach (17-2), and lock sleeve (17) cover is established outside adjusting collar (20), lock nut (16) and casing (1) threaded connection, and have in lock nut (16) by preceding interior inclined plane (16-1) to the outer slope of back, interior inclined plane (16-1) and the outer wall contact of lock sleeve (17).
9. The needleless injector of claim 8, wherein: the outer periphery wall of the locking sleeve (17) is provided with an outer inclined surface (17-1) which is inclined outwards from front to back, and the inner inclined surface (16-1) is in contact with the outer inclined surface (17-1).
10. The needleless injector of claim 1, wherein: the second elastic element (21) is a spring, one end of the second elastic element (21) is propped against the shell (1), and the other end of the second elastic element is propped against the front end of the piston (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111235161.5A CN113975544B (en) | 2021-10-22 | 2021-10-22 | Needleless injector with adjustable injection dosage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111235161.5A CN113975544B (en) | 2021-10-22 | 2021-10-22 | Needleless injector with adjustable injection dosage |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113975544A true CN113975544A (en) | 2022-01-28 |
| CN113975544B CN113975544B (en) | 2024-04-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111235161.5A Active CN113975544B (en) | 2021-10-22 | 2021-10-22 | Needleless injector with adjustable injection dosage |
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| CN (1) | CN113975544B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114984379A (en) * | 2022-05-18 | 2022-09-02 | 浙江工业大学 | High-pressure driven needleless injection device |
| CN115154766A (en) * | 2022-06-21 | 2022-10-11 | 江苏益明荣药医疗科技有限公司 | Self-energizing device for needleless injector |
| CN115212389A (en) * | 2022-07-08 | 2022-10-21 | 北京快舒尔医疗技术有限公司 | Injection drive unit and injection assembly with same |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114984379A (en) * | 2022-05-18 | 2022-09-02 | 浙江工业大学 | High-pressure driven needleless injection device |
| CN114984379B (en) * | 2022-05-18 | 2024-02-09 | 浙江工业大学 | High-pressure driven needleless injection device |
| CN115154766A (en) * | 2022-06-21 | 2022-10-11 | 江苏益明荣药医疗科技有限公司 | Self-energizing device for needleless injector |
| CN115154766B (en) * | 2022-06-21 | 2023-10-20 | 江苏乐聚医药科技有限公司 | Self-energizing device for needleless injector |
| CN115212389A (en) * | 2022-07-08 | 2022-10-21 | 北京快舒尔医疗技术有限公司 | Injection drive unit and injection assembly with same |
| CN115212389B (en) * | 2022-07-08 | 2023-12-08 | 北京快舒尔医疗技术有限公司 | Injection driving unit and injection assembly with same |
| 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 |
| CN115591055B (en) * | 2022-08-24 | 2023-11-07 | 江苏乐聚医药科技有限公司 | Differential needleless injector |
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