CN218961487U

CN218961487U - Air spring type needleless injector

Info

Publication number: CN218961487U
Application number: CN202222030128.5U
Authority: CN
Inventors: 徐浩宇; 熊良才; 王智智; 史铁林; 王健; 张铖森; 王浩然
Original assignee: Jiangsu Baike Medical Technology Co ltd
Current assignee: Jiangsu Baike Medical Technology Co ltd
Priority date: 2022-08-03
Filing date: 2022-08-03
Publication date: 2023-05-05
Anticipated expiration: 2032-08-03

Abstract

The utility model provides a gas spring type needleless syringe, including the shell, set up installation space in the shell, set up first recess on the shell, and first recess and installation space intercommunication, be equipped with trigger mechanism on the first recess, one side is equipped with the ampoule in the installation space, and slide in the ampoule and be equipped with the piston rod that is arranged in ejecting the ampoule liquid medicine, one side of the relative ampoule in the installation space is equipped with the gas spring casing, slide on the gas spring casing and be equipped with first ejector pin, trigger mechanism can carry out spacingly to first ejector pin, toggle trigger mechanism can make first ejector pin outwards slide on the gas spring casing, still be provided with resetting means in addition, resetting means alright implement the reset to ejecting the outer first ejector pin of gas spring casing. The utility model installs the gas spring in the outer cover, can make the gas spring inject the liquid medicine in the ampoule into human body through buckling the triggering mechanism, simple in construction, and because the gas spring has smaller size and weight, and have better leak tightness.

Description

Air spring type needleless injector

Technical Field

The utility model belongs to the field of medical treatment, and particularly relates to a gas spring type needleless injector.

Background

The needleless injector is different from the traditional needle injector, the needleless injector does not use a needle, the liquid medicine is sprayed from an orifice with very small aperture at a high speed under the action of a high-pressure driving device, and the formed very fine high-speed medicine jet can instantaneously penetrate the skin to complete injection.

Because the jet diameter of the liquid medicine is far smaller than that of the traditional needle, the pain caused by injection is very weak, and the interference emotion of patients to injection can be reduced. In addition, because no needle is used for needleless injection, potential needling injury can be avoided, and skin hardening caused by repeated injection of the same part for a long time can also be avoided, so that the injection device is suitable for long-term injection and large-scale injection scenes.

The existing pneumatic needleless injector is complex in structure, large in size of parts, unfavorable for carrying and moving, and difficult in guaranteeing air tightness, and the pneumatic needleless injector is high in price due to the factors, so that popularization and use of the pneumatic needleless injector are limited. A gas spring needleless injector is therefore proposed which addresses the above-mentioned problems.

Disclosure of Invention

The utility model aims to provide a gas spring type needleless injector, which solves the technical problems that the traditional pneumatic needleless injector has overlarge volume and weight and the air tightness is difficult to ensure.

In order to achieve the above purpose, the specific technical scheme of the gas spring type needleless injector is as follows:

the utility model provides a gas spring type needleless injector, including resetting means and shell, set up installation space in the shell, set up first recess on the shell, and first recess and installation space intercommunication, be equipped with trigger mechanism on the first recess, one side is equipped with the ampoule in the installation space, and slide in the ampoule and be equipped with the piston rod that is arranged in ejecting the ampoule liquid medicine, one side of the relative ampoule in the installation space is equipped with the gas spring casing, slide on the gas spring casing and be equipped with first ejector pin, trigger mechanism can carry out spacingly to first ejector pin, toggle trigger mechanism can make first ejector pin outwards slide on the gas spring casing, and first ejector pin promotes the piston rod and make the liquid medicine in the ampoule be ejected, take out the ampoule from the needleless injector of gas spring type after the injection is accomplished, alright place the needleless injector of gas spring type in resetting means, and resetting means alright implement the reset to the first ejector pin that pops out the gas spring casing.

The gas spring type needleless injector has the following advantages:

1. according to the utility model, the gas spring is arranged in the shell, and the liquid medicine in the ampoule can be injected into a human body by the gas spring through the buckling triggering mechanism, so that the pneumatic needleless injector has a simple structure, and has a good sealing property due to the fact that the gas spring has a small size and a small weight, thereby achieving the purpose of reducing the volume of the pneumatic needleless injector, and being convenient to use and low in cost.

2. The utility model sets the inner insurance on the shell in a sliding way and sets the outer insurance on the inner insurance, thereby increasing the safety of the gas spring needleless injector and preventing the false triggering of the trigger when carrying the gas spring needleless injector.

3. The utility model is that

Drawings

FIG. 1 is a schematic view of a gas spring type needleless injector according to the present utility model;

FIG. 2 is a schematic illustration in semi-section of a gas spring type needleless injector of the present utility model;

FIG. 3 is a schematic diagram of a reset device according to the present utility model;

fig. 4 is a schematic view in semi-section of a reset device of the present utility model.

The figure indicates:

1. a housing; 101. a front section; 1011. a threaded section; 1012. a first chute; 1013. a first groove; 1014. a second groove; 102. a middle section; 103. a tail section; 2. internal insurance; 201. a protrusion; 3. external insurance; 4. a gasket; 5. an ampoule; 6. a piston rod; 7. fastening a screw; 8. a trigger; 801. a stop block; 802. a third groove; 9. an elastic member; 10. a first baffle; 11. a first lumen; 12. a second lumen; 13. a gas spring housing; 14. a first ejector rod; 15. a protective shell; 16. a cover; 17. a bottom plate; 18. loading a box; 19. a second baffle; 20. a second chute; 21. a connecting frame; 22. a support arm; 23. a connecting rod; 24. a second ejector rod; 25. and a supporting block.

Detailed Description

In order that the above-recited objects, features and advantages of the present utility model will be more clearly understood, a more particular description of the utility model will be rendered by reference to the appended drawings and appended detailed description. It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model, however, the present utility model may be practiced otherwise than as described herein, and therefore the scope of the present utility model is not limited to the specific embodiments disclosed below.

A gas spring type needleless injector according to some embodiments of the present utility model is described below with reference to fig. 1 to 4.

As shown in fig. 1 and 2, a gas spring type needleless injector according to some embodiments of the present utility model includes a housing 1, an installation space is formed in the housing 1, a first groove 1013 is formed in the housing 1 and is communicated with the installation space, and a trigger mechanism is disposed on the first groove 1013. The ampoule 5 is arranged at the left end of the installation space, the piston rod 6 is arranged on the left side of the ampoule 5 in a sliding manner, the gas spring shell 13 is arranged on the right side of the installation space, the first ejector rod 14 is arranged on the right side of the gas spring shell 13 in a sliding manner, and the triggering device limits the first ejector rod 14.

The cavity in the ampoule 5 at the left end of the piston rod 6 is used for storing liquid medicine, the cavity in the gas spring housing 13 at the right end of the first ejector rod 14 is filled with high-pressure nitrogen, the opening of the left end of the ampoule 5 is aligned to the part to be injected with the liquid medicine, under the action of the high-pressure nitrogen, when the trigger device releases the limit of the first ejector rod 14, the high-pressure nitrogen ejects the first ejector rod 14 at a high speed, then the first ejector rod 14 contacts with the piston rod 6 and ejects the piston rod 6 at a high speed, so that the liquid medicine in the ampoule 5 is ejected at a high speed and penetrates through the skin, enters the skin, and the liquid medicine is in spherical diffusion, and is injected at the moment. In order to reset the first ejector rod 14, a reset device is further arranged, after injection is completed, the ampoule 5 is taken out of the gas spring type needleless injector, the gas spring type needleless injector taking out the ampoule 5 can be placed in the reset device, and the reset device is operated to reset the first ejector rod 14 ejected out of the gas spring shell 13.

The installation space is composed of a first inner cavity 11 on the left side in the housing 1 and a second inner cavity 12 on the right side in the housing 1, and the first recess 1013 communicates with the first inner cavity 11. The diameter of the first inner cavity 11 is larger than that of the second inner cavity 12, the first inner cavity 11 is communicated with the second inner cavity 12, a gas spring shell 13 is slidably installed in the second inner cavity 12, and the left end of the gas spring shell 13 is in contact with the left end face of the second inner cavity 12, so that the left end face of the second inner cavity 12 limits the gas spring shell 13. The first plunger 14 in the gas spring housing 13 can extend into the first interior space 11 and can move left and right in the first interior space 11.

The shell 1 comprises a front section 101, a middle section 102 and a tail section 103, the front section 101 is further provided with a thread section 1011, the inner wall of the thread section 1011 is provided with internal threads, threads are arranged outside the ampoule 5, and the ampoule 5 is in threaded connection with the thread section 1011 so as to ensure the installation stability of the ampoule 5 on the shell 1. The gas spring shell 13 can be disassembled and assembled in the second inner cavity 12, and the sealing cover 16 is arranged at the tail section 103 to limit the gas spring shell 13, so that the gas spring shell 13 is independent of the tail section 103 of the shell 1, and the disassembly and the assembly are convenient. Specifically, the outer diameter of the threaded section 1011 is smaller than the outer diameter of the front section, the outer diameter of the front section 101 is smaller than the outer diameter of the middle section 102, and the outer diameter of the middle section 102 is smaller than the outer diameter of the tail section 103, so that the housing 1 is stepped. The first groove 1013 is formed in the middle section 102, the triggering mechanism comprises first baffle plates 10 which are symmetrically arranged on the first groove 1013 in a front-back mode, a trigger 8 which is rotatably arranged between the two first baffle plates 10 through a pin shaft, a third groove 802 is formed in the left side of the bottom surface of the trigger 8, a stop block 801 is arranged on the bottom surface of the right side of the trigger 8, and a first ejector rod 14 is located at the right end of the stop block 801, so that the stop block 801 limits the first ejector rod 14.

The middle gas spring shell 13 is detachably arranged in the second inner cavity 12, and is in threaded connection with the sealing cover 16 at the tail part of the shell 1, and the left end of the sealing cover 16 is contacted with the right end of the gas spring, so that the gas spring shell 13 is limited in the second inner cavity 12. In order to prevent the first ejector rod 14 from being blocked on the stop block 801 for a long time to damage and wear the first ejector rod, a protective shell 15 is connected to the left end of the first ejector rod 14 through a screw, and the upper side of the left end of the protective shell 15 is contacted with the lower side of the right end of the stop block 801, so that the stop block 801 limits the first ejector rod 14 through the protective shell 15 and plays a role in protecting the first ejector rod 14. Pressing the left end of trigger 8, trigger 8 rotates around the round pin axle, and dog 801 on the trigger 8 lifts upwards for dog 801's right-hand member downside breaks away from with the left end upside of protective housing 15, and the high-pressure nitrogen gas in the air spring casing 13 is ejecting first ejector pin 14 and protective housing 15 at a high speed left, and afterwards in first ejector pin 14 is ejecting piston rod 6 left into ampoule 5 through protective housing 15 at a high speed, alright with the liquid medicine in ampoule 5 from ampoule 5's left end export high speed.

Preferably, the inner safety 2 is slidably disposed on the outer periphery of the front section 101, the right side of the inner safety 2 is provided with the protrusion 201, the protrusion 201 is in a ring shape and is connected to the right end of the inner safety 2, the ring shape protrusion can slide to the range of the third groove 802 formed on the bottom surface of the trigger 8, and when the inner safety 2 slides rightward in the front section 101 and slides the protrusion 201 to the range of the third groove 802, the left end of the trigger 8 can be pressed downward. Meanwhile, the outer safety device 3 is arranged on the outer circle of the inner safety device 2 in a sliding mode, the outer safety device 3 is cylindrical, the outer safety device 3 slides to the right side of the inner safety device 2 and is positioned after the trigger 8 contacts, and therefore limiting of the outer safety device 3 to the trigger 8 is achieved. The trigger 8 is triggered by sliding the protrusion 201 of the inner safety 2 within the range of the third groove 802 and sliding the outer safety 3 to the left end of the upper inner safety 2, so that the trigger 8 is triggered in a double protection manner, and the gas spring needleless injector can be protected from false contact during carrying.

The upper end of the left side of the inner insurance 2 is provided with a threaded hole, the front section 101 is provided with a first chute 1012, the threaded hole is internally and in threaded connection with a fastening screw 7, the fastening screw 7 passes through the threaded hole and can extend into the first chute 1012, so that the outer insurance 3 can only move within the range of the first chute 1012 at the front end, and the outer insurance 3 is prevented from falling out of the range of the front section 101. Specifically, when the inner protector 2 moves rightward on the front section 101 and the protrusion 201 moves within the range of the third groove 802, the movement of the inner protector 2 is stopped and the fastening screw 7 rotates in the inner protector 2, so that the bottom surface of the fastening screw 7 contacts with and is screwed on the first chute 1012, and the fixation of the inner protector 2 on the front section 101 can be realized.

The right end of the front section 101 is further sleeved with a gasket 4, the right end of the protrusion 201 is in contact with the gasket 4, and the right end surface of the gasket 4 is in contact with the left end surface of the middle section 102, so that the gasket 4 is limited between the right end surface of the protrusion 201 and the left end surface of the middle section 102. While the washer 4 is a reset washer, the washer 4 can push the protrusion 201 to move leftwards on the front section 101 and move the protrusion 201 to within the effective range of the depression of the third groove 802, so that the trigger 8 cannot be pressed further.

Because the ampoule 5 is screwed to the thread section 1011, the right end face of the head of the ampoule 5 can be brought into contact with the left end face of the inner protector 2 when the ampoule 5 is rotated on the thread section 1011 when the ampoule 5 is mounted in the thread section 1011. When the right end face of the head of the ampoule 5 contacts with the left end face of the thread section 1011, the protrusion 201 on the inner safety 2 enters into the effective range of the third groove 802, and the operation is simple and the use is convenient.

The protrusion 201 may be a protrusion protruding outward from the inner protector 2 or other shape, in addition to the annular protrusion 201, and is not limited thereto.

In order to realize automatic resetting after the trigger 8 is pressed, a second groove 1014 is formed at the right end of the upper side of the middle section 102, an elastic piece 9 is arranged in the second groove 1014, and the upper end of the elastic piece 9 is contacted with the trigger 8. Specifically, the elastic member 9 is a spring or a spring plate, and the upper end of the elastic member 9 is connected to the lower end of the trigger 8, and the lower end of the elastic member 9 is connected to the bottom surface of the second groove 1014.

The ampoule 5 is screwed into the threaded section 1011 and screwed, the ampoule 5 drives the inner protector 2 to move rightwards, so that the bulge 201 on the inner protector 2 moves to the effective working range of the third groove 802, then the outer protector 3 slides leftwards and is separated from the effective working range when the trigger 8 is pressed, the left end outlet of the ampoule 5 is aligned with the position where the liquid medicine needs to be injected, the trigger 8 is pressed, the protective shell 15 is separated from the stop 801 on the trigger 8, the first ejector rod 14 ejects out of the air spring shell 13 at a high speed, the protective shell 15 on the first ejector rod 14 pushes the piston rod 6, the piston rod 6 can push the liquid medicine in the ampoule 5 out at a high speed, and the liquid medicine is transmitted through the skin, enters the skin and is in spherical diffusion, and at the moment, the injection is completed.

As shown in fig. 3 and 4, the resetting device comprises a rectangular bottom plate 17, a loading box 18 is arranged on the right side of the top surface of the bottom plate 17, a supporting block 25 is arranged on the left side of the top surface of the bottom plate 17, a supporting arm 22 is rotatably arranged on the supporting block 25, and a connecting rod 23 is symmetrically rotatably arranged on the right side of the supporting arm 22. The connecting frame 21 is arranged on the left side of the top surface of the bottom plate 17 in a sliding mode, the specific shape of the connecting frame 21 is U-shaped, a rotating shaft is fixedly arranged at the right end of the connecting frame 21, the right end of the connecting rod 23 is rotatably connected with the right end of the connecting frame 21 through the rotating shaft, and therefore the connecting rod 23 can conveniently rotate on the connecting frame 21. The connecting rod 23, the connecting frame 21 and the support arm 22 form a crank-connecting rod mechanism, and the operation is simple. A second push rod 24 facing to the right is provided on the left end cross plate of the connecting frame 21, and the second push rod 24 penetrates the left end surface of the loading box 18 and slides on the loading box 18. The gas spring needleless injector and the resetting device are both made of aluminum alloy, so that the gas spring needleless injector is light in weight and convenient to carry.

Specifically, two second baffles 19 are symmetrically arranged on the bottom plate 17, a second chute 20 is arranged below the first baffle, a rotating shaft arranged on the connecting frame 21 penetrates through the multiple connecting rods 23 and extends outwards, and the extending end of the rotating shaft is slidably arranged in the second chute 20. After removing ampoule 5 from the air spring type needleless injector, the inner guard 2 on the front section 101 is slid until the projection 201 is positioned in the third groove 802, then the fastening screw 7 is rotated to fix the projection 201 with the first sliding movement, so that the projection 201 is positioned in the working range of the third groove 802, and then the outer guard 3 is slid to the left side of the inner guard 2 so as to be far away from the left end of the trigger 8. The trigger mechanism of the gas spring type needleless injector after ampoule 5 is removed is upward and placed in the loading box 18, the support arm 22 is pressed towards the lower right, the second ejector rod 24 slides towards the right under the action of the connecting rod 23 mechanism, the second ejector rod 24 firstly passes through the threaded section 1011 and stretches into the middle section 102, and after the right end of the second ejector rod 24 is contacted with the protective shell 15, the support arm 22 is continuously pressed, so that the first ejector rod 14 moves rightwards under the action of the second ejector rod 24. During movement, the upper end of the protective shell 15 starts to contact with the stop 801, the trigger 8 starts to rotate counterclockwise around the pin, and the third groove 802 is scratched on the protrusion 201. When the protective housing 15 moves to the right end of the stopper 801, the trigger 8 is reset under the action of the elastic member 9, and the protective housing 15 is locked and limited. After that, the pressing arm 22 is stopped and opened to complete the resetting operation of the gas spring type needleless injector, the gas spring type needleless injector is taken out, the fastening screw 7 is unscrewed, the inner safety 2 is pushed leftwards by the gasket 4, the protrusion 201 is separated from the effective working range of the third groove 802, the outer safety 3 is slid to the right side of the inner safety 2, and the limit of the trigger 8 is completed.

In the present utility model, the terms "first," "second," "third," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance: the term "plurality" means two or more, unless explicitly defined otherwise. The terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; "coupled" may be directly coupled or indirectly coupled through intermediaries. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

The above is only a preferred embodiment of the present utility model, and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. The gas spring type needleless injector is characterized by comprising a shell (1), wherein an installation space is formed in the shell (1), a first groove (1013) is formed in the shell (1), the first groove (1013) is communicated with the installation space, a trigger mechanism is arranged on the first groove (1013), an ampoule (5) is arranged on one side in the installation space, a piston rod (6) for pushing out liquid medicine in the ampoule (5) is arranged in the ampoule (5) in a sliding manner, a gas spring shell (13) is arranged on one side, opposite to the ampoule (5), of the installation space, a first ejector rod (14) is arranged on the gas spring shell (13) in a sliding manner, the trigger mechanism can limit the first ejector rod (14), the first ejector rod (14) can slide outwards on the gas spring shell (13) through stirring, and the first ejector rod (14) pushes the piston rod (6) so that the liquid medicine in the ampoule (5) is ejected;

in order to reset the first ejector rod (14), a reset device is further arranged, the ampoule (5) is taken out of the gas spring type needleless injector, the gas spring type needleless injector can be placed in the reset device, and the reset device can reset the first ejector rod (14) which is ejected out of the gas spring shell (13).

2. A gas spring type needleless injector as claimed in claim 1 in which: the resetting device comprises a bottom plate (17), loading boxes (18) are arranged on the bottom plate (17), the syringes can be placed in the loading boxes (18), the bottom plate (17) is connected in a sliding mode, second ejector rods (24) are arranged on the connecting frames (21), the second ejector rods (24) penetrate through the loading boxes (18), supporting blocks (25) are arranged on the bottom plate (17) in a rotating mode relative to one ends of the loading boxes (18), supporting arms (22) are arranged on the supporting blocks (25) in a rotating mode, connecting rods (23) are symmetrically arranged on the supporting arms (22) in a rotating mode, one ends, far away from the supporting arms (22), of the connecting rods (23) are movably connected with one end, close to the connecting frames (21), of the loading boxes (18), second sliding grooves (19) are formed in the bottom plate (17), second sliding grooves (20) are formed in the connecting rods (23), the rotating shafts are connected with the connecting frames (21) in a rotating mode, and the rotating shafts are fixedly connected with the corresponding second sliding grooves (20) in the sliding mode.

3. A gas spring type needleless injector as in claim 1, wherein the trigger mechanism comprises first baffles (10) symmetrically arranged on the first grooves (1013), a trigger (8) is rotatably arranged between the two first baffles (10) through a pin shaft, a stop block (801) is arranged on the bottom surface of the trigger (8), one side of the bottom end of the stop block (801) is contacted with the first ejector rod (14) and limits the implementation, the shell (1) comprises a front section (101), a middle section (102) and a tail section (103), a threaded section (1011) is arranged on the front section (101), an internal thread is arranged on the inner wall of the threaded section (1011), the ampoule (5) is in threaded connection with the threaded section (1011), a gas spring shell (13) is slidably arranged in the installation space, a sealing cover (16) is in threaded connection with the tail section (103), and the sealing cover (16) can limit the gas spring shell (13).

4. A gas spring type needleless injector as in claim 3, characterized in that the front section (101) is provided with an inner safety (2) in a sliding way, a bulge (201) is arranged on one side of the inner safety (2), a gasket (4) is sleeved on the front section (101) between the bulge (201) and the middle section (102), the bulge (201) is contacted with the gasket (4), the inner safety (2) is provided with an outer safety (3) in a sliding way, a third groove (802) is formed on one side of a trigger (8) opposite to the stop block (801), and the bulge (201) is matched with the third groove (802).

5. A gas spring type needleless injector as in claim 4, wherein the top end of one side of the inner safety device (2) is provided with a threaded hole, a first chute (1012) is arranged on the front section (101), a fastening screw (7) is connected in the threaded hole in a threaded way, the fastening screw (7) penetrates through the threaded hole and can extend into the first chute (1012), and the fastening screw (7) can slide in the first chute (1012).

6. A gas spring type needleless injector as claimed in claim 3, wherein a second groove (1014) is formed at one end of the upper side of the middle section (102), an elastic member (9) is arranged in the second groove (1014), and the upper end of the elastic member (9) is in contact with the trigger (8).

7. A gas spring type needleless injector as claimed in claim 1, wherein a protective shell (15) is connected to the side of the first ejector rod (14) opposite to the tail of the gas spring shell (13) through a screw.