CN110743065B

CN110743065B - Novel rechargeable needleless injection promotes device

Info

Publication number: CN110743065B
Application number: CN201911034105.8A
Authority: CN
Inventors: 璧典寒; 赵亮
Original assignee: WUHAN HOSPITAL OF TRADITIONAL CHINESE MEDICINE
Current assignee: WUHAN HOSPITAL OF TRADITIONAL CHINESE MEDICINE
Priority date: 2019-10-29
Filing date: 2019-10-29
Publication date: 2022-01-11
Anticipated expiration: 2039-10-29
Also published as: CN110743065A

Abstract

The invention relates to the technical field of pushing injection equipment, in particular to a novel charging type needle-free injection pushing device, which comprises a holding handle, wherein a pushing injection device is arranged on the holding handle, and a medicine injection device is arranged on the pushing injection device; the injection device comprises a fixed cylinder arranged on the holding handle; the injection device is equipped with the lithium cell mounting box including setting up the cylinder of tip before the solid fixed cylinder in the recess, is equipped with injection mechanism in the solid fixed cylinder, and injection mechanism is equipped with the boosting piston including setting up the micro motor in the solid fixed cylinder, and the end that micro motor was kept away from to the guide pillar, and the end of connecting rod is equipped with and pushes the piston. The invention is convenient for replacing the spray head, can carry out continuous injection operation, can adjust the single injection amount and is convenient for a user to use.

Description

Novel rechargeable needleless injection promotes device

Technical Field

The invention relates to the technical field of pushing injection equipment, in particular to a novel charging type needleless injection pushing device.

Background

At present, the injector with the needle is mainly used for injection clinically, the needle is easy to cause the defects of injection pain, bleeding, tissue injury and the like when penetrating the skin, in order to overcome the defects, the needle-free injector is gradually popularized and used due to the advantages of no needle, no pain, tiny wound surface, dispersed distribution and penetration of local liquid medicine, but most of the needle-free injectors cannot carry out continuous injection when in use, and in addition, the nozzle cannot be replaced, so that certain inconvenience is brought to users.

Disclosure of Invention

The invention aims to provide a novel charging type needleless injection pushing device, which solves the problems that most needleless injectors proposed in the background technology cannot perform continuous injection and cannot replace a nozzle, and further inconvenience is brought to a user.

In order to achieve the purpose, the invention provides the following technical scheme:

a novel charging type needle-free injection pushing device comprises a holding handle, wherein a pushing injection device is arranged on the holding handle, and a medicine injection device is arranged on the pushing injection device; the injection device comprises a fixed barrel arranged on the holding handle; the medicine injection device comprises a needle cylinder arranged at the front end part of the fixed cylinder.

Preferably, the holding handle is internally provided with a groove, the groove is internally provided with a lithium battery mounting box, and the lithium battery mounting box is internally provided with a rechargeable lithium battery.

Preferably, a plurality of first heat dissipation grooves which are linearly arranged at equal intervals and communicated with the outside are further formed in the groove wall on one side of the groove, and a plurality of first arc-shaped grooves which are linearly arranged at equal intervals are further formed in the holding handle.

Preferably, the inner wall of the fixed cylinder is provided with two guide grooves which are opposite to each other and are arranged along the length direction of the fixed cylinder, the fixed cylinder is internally provided with an injection mechanism, the injection mechanism comprises a micro motor arranged in the fixed cylinder, the tail end of an output shaft of the micro motor is tightly welded with a screw rod which is arranged in a horizontal shape, the screw rod faces one side of the needle cylinder, the screw rod is provided with a guide pillar, the guide pillar is internally provided with a first threaded hole which is arranged along the length direction of the guide pillar and is communicated with the outside, the screw rod penetrates through the first threaded hole and is in threaded connection with the first threaded hole, the guide pillar is provided with two guide plates which are symmetrical to each other, the tail ends of the guide plates are positioned in the guide grooves and are in sliding connection with the guide grooves, the tail end of the guide pillar, which is far away from the micro motor, the central position of the side surface of the guide pillar, of the guide piston, is provided with a connecting rod which is arranged in a horizontal shape, the tail end of the connecting rod is provided with a pushing piston which is positioned in the needle cylinder and is connected with the needle cylinder in a sliding way.

Preferably, the rear end of the fixed cylinder is fixedly provided with a rear cover through a plurality of fastening screws, the fixed base on the micro motor is fixedly arranged on the rear cover through a plurality of fastening screws, and the rear cover is internally provided with a plurality of second heat dissipation grooves communicated with the outside.

Preferably, the syringe is provided with a medicine inlet pipe communicated with the syringe, the medicine inlet pipe is provided with a one-way valve for allowing liquid to flow into the syringe in a one-way manner, the body of the medicine inlet pipe is further provided with two first bayonets which are symmetrical to each other, the medicine inlet pipe is further provided with a medicine storage bottle, the medicine storage bottle is provided with a threaded pipe, the position, opposite to the first bayonets, on the pipe wall of the threaded pipe is provided with a first buckle, and the first buckle and the first bayonets are in clamping fit.

Preferably, the front end of the medicine inlet tube is further integrally formed with a medicine outlet tube, the end of the needle cylinder close to the medicine outlet tube is further provided with two symmetrical second bayonets, the tube of the medicine outlet tube is provided with two symmetrical third bayonets, the medicine outlet tube is provided with an injection nozzle, the inner wall of the injection nozzle is provided with a third buckle at a position right opposite to the third bayonets, the third buckle is in clamping fit with the third bayonets, the injection nozzle is provided with two symmetrical fourth bayonets, the injection nozzle is provided with a protective barrel, the inner wall of the protective barrel is provided with a fourth buckle at a position right opposite to the fourth bayonets, the fourth buckle is in clamping fit with the fourth bayonets, the front end of the needle cylinder is further provided with a rubber protective cover for protecting the injection nozzle inside, and the rubber protective cover is provided with a fixed tube, the inner wall of the fixed pipe is provided with a second buckle opposite to the second bayonet, and the second buckle is in clamping fit with the second bayonet.

Preferably, the inner wall of the fixed cylinder is further provided with two second arc-shaped grooves which are opposite to each other and communicated with the outside, the second arc-shaped grooves are located between the guide groove and the needle cylinder, a positioning installation groove is further arranged on the inner wall of the fixed cylinder between the two second arc-shaped grooves, the positioning installation groove is communicated with the second arc-shaped grooves and is concentrically arranged, and the connecting rod is provided with two limiting plates which are symmetrical up and down and are arranged along the length direction of the connecting rod.

Preferably, the connecting rod is further sleeved with a stud, a through hole which is arranged along the length direction of the stud and is communicated with the outside is arranged in the stud, the connecting rod penetrates through the through hole, a sliding groove is arranged on the hole wall of the through hole, which is opposite to the position of the limiting plate, the limiting plate is arranged in the sliding groove and is in sliding connection with the sliding groove, a knob is further sleeved on the stud, a second threaded hole which is communicated with the outside is arranged in the knob, the stud penetrates through the second threaded hole and is in threaded connection with the second threaded hole, a sealing cushion layer which is tightly attached to the inner wall of the fixed cylinder is arranged on the surface of the knob, and a limiting snap ring is further arranged in the middle of the annular surface of the knob and is arranged in the positioning installation groove.

Preferably, the annular surface of the limiting snap ring is further provided with an anti-slip layer.

Compared with the prior art, the invention has the beneficial effects that:

1. according to the invention, the corresponding rechargeable lithium battery is arranged in the lithium battery mounting box through the lithium battery mounting box, so that the device is provided with a power supply and is convenient to use.

2. The injection device drives the injection piston to move forwards or backwards by the operation of the micro motor, so that the corresponding processes of imbibing and injecting liquid medicine are completed, the operation is convenient, the effect of connecting injection can be achieved by the operation of the micro motor, and the injection operation is convenient.

3. According to the invention, the injection nozzle and the protection barrel are arranged, and the protection barrel is in threaded connection with the medicine outlet pipe, so that the injection nozzle and the protection barrel can be conveniently detached, and the injection nozzle can be conveniently replaced.

4. According to the invention, through the knob and the stud, the position of the stud is adjusted by rotating the knob, so that the forward movement distance of the single-injection piston is further adjusted, and the effect of controlling the injection amount is achieved.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is an exploded view of the present invention;

FIG. 3 is an enlarged view taken at A of FIG. 2 in accordance with the present invention;

FIG. 4 is a schematic view of the structure of the grip handle of the present invention;

FIG. 5 is a schematic view of a bolus device of the present invention;

FIG. 6 is an exploded view of the injection mechanism of the present invention;

FIG. 7 is a sectional view of a stationary barrel provided with a guide groove according to the present invention;

FIG. 8 is a schematic structural view of an injection nozzle according to the present invention;

FIG. 9 is a cross-sectional view of the protective sleeve of the present invention;

FIG. 10 is a cross-sectional view of a threaded tubular of the present invention;

FIG. 11 is a cross-sectional view of the injection nozzle of the present invention;

FIG. 12 is a cross-sectional view of the rubber boot and the fixed tube of the present invention;

FIG. 13 is a schematic view of the present invention with an arc-shaped slot;

FIG. 14 is a cross-sectional view of a stationary barrel of the present invention with an arcuate slot and a detent mounting slot;

FIG. 15 is a schematic view of the present invention with a limiting plate, a stud and a knob;

FIG. 16 is a schematic structural diagram of a limiting plate according to the present invention;

FIG. 17 is a schematic view of a stud according to the present invention.

The meaning of the individual reference symbols in the figures is:

1. a grip handle; 10. a groove; 11. a lithium battery mounting box; 12. a first heat sink; 13. a first arc-shaped slot; 14. a switch;

2. a bolus injection device; 20. a fixed cylinder; 201. a guide groove; 21. an injection mechanism; 211. a micro motor; 212. a screw rod; 213. a guide post; 2131. a first threaded hole; 214. a guide plate; 215. a boost piston; 216. a connecting rod; 217. pushing a piston; 22. a rear cover; 221. a second heat sink;

3. a drug injection device; 30. a needle cylinder; 31. a medicine inlet pipe; 311. a one-way valve; 32. a medicine storage bottle; 321. a threaded pipe; 33. a medicine outlet pipe; 34. an injection nozzle; 35. a protective cylinder; 36. a rubber boot; 37. a fixed tube;

4. a second arc-shaped slot; 40. positioning the mounting groove;

5. a limiting plate;

6. a stud; 60. a through hole; 61. a chute;

7. a knob; 70. a second threaded hole; 71. sealing the cushion layer; 72. a limit snap ring; 721. an anti-slip layer;

8. a first bayonet; 80. a second bayonet; 81. a third bayonet; 82. a fourth bayonet;

9. a first buckle; 90. a second buckle; 91. a third buckle; 92. and a fourth buckle.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

Referring to fig. 1-17, the present invention provides a technical solution:

a novel charging type needleless injection pushing device comprises a holding handle 1, wherein a groove 10 communicated with the outside is formed in the holding handle 1, a lithium battery mounting box 11 is arranged in the groove 10, and a rechargeable lithium battery is arranged in the lithium battery mounting box 11, so that the device is provided with a power supply and is convenient to use; a plurality of first heat dissipation grooves 12 which are linearly arranged at equal intervals and communicated with the outside are also formed in the groove wall on one side of the groove 10, so that heat generated by the lithium battery can be timely discharged from the first heat dissipation grooves 12 when the lithium battery works; the gripping handle 1 is also provided with a plurality of first arc-shaped grooves 13 which are linearly arranged at equal intervals, so that a worker can hold the gripping handle 1 more smoothly;

the injection device 2 is arranged on the holding handle 1, the injection device 2 comprises a fixed cylinder 20 arranged on the holding handle 1, two guide grooves 201 which are opposite to each other and are arranged along the length direction of the fixed cylinder 20 are arranged on the inner wall of the fixed cylinder 20, an injection mechanism 21 is arranged in the fixed cylinder 20, the injection mechanism 21 comprises a micro motor 211 arranged in the fixed cylinder 20, a lead screw 212 which is arranged in a horizontal shape is tightly welded at the tail end of an output shaft of the micro motor 211, the lead screw 212 faces one side of the needle cylinder 30, a guide pillar 213 is arranged on the lead screw 212, a first threaded hole 2131 which is arranged along the length direction of the guide pillar 213 and is communicated with the outside is arranged in the guide pillar 213, the lead screw 212 penetrates through the first threaded hole 2131 and is in threaded connection with the first threaded hole 2131, two guide plates 214 which are symmetrical to each other are arranged on the guide pillar 213, the tail ends of the guide plates 214 are positioned in the guide grooves 201 and are in sliding connection with the guide grooves 201, the guide post 213 can be driven to move forwards or backwards when the screw rod 212 rotates forwards or backwards;

the guide pillar 213 is kept away from on the terminal cylinder of micro motor 211 integrated into one piece has boosting piston 215, boosting piston 215 is located solid fixed cylinder 20, boosting piston 215 is kept away from the side central point department integrated into one piece of guide pillar 213 and is the connecting rod 216 that the level form set up, the terminal integrated into one piece of connecting rod 216 has injection piston 217, injection piston 217 is located the cylinder 30 and with cylinder 30 between sliding connection, guarantee when pulling backward injection piston 217, can inhale the liquid medicine in the cylinder 30, when pushing forward injection piston 217, can realize giving the liquid medicine in the cylinder 30 and extrude.

In this embodiment, the rear end of the fixed cylinder 20 is fixedly provided with the rear cover 22 through a plurality of fastening screws, threaded holes communicated with the outside are formed in the rear cover 22 and the fixed cylinder 20, and the rear cover 22 is fixedly arranged on the fixed cylinder 20 through the fastening screws, so that the installation is convenient; the fixing base on the micro motor 211 is fixedly arranged on the rear cover 22 through a plurality of fastening screws, a plurality of threaded holes communicated with the outside are formed in the fixing base on the micro motor 211 and the rear cover 22, and the fixing base on the micro motor 211 is fixedly arranged on the rear cover 22 through the fastening screws, so that the mounting is convenient, and the dismounting is convenient; the rear cover 22 is further provided with a plurality of second heat dissipation grooves 221 communicated with the outside, the second heat dissipation grooves 221 are also communicated with the fixed cylinder 20, and therefore heat in the fixed cylinder 20 can be timely discharged outwards through the second heat dissipation grooves 221.

In this embodiment, the injection device 2 is provided with the drug injection device 3, the drug injection device 3 includes a needle cylinder 30 arranged at the front end of the fixed cylinder 20, the needle cylinder 30 is provided with a drug inlet tube 31 communicated with the needle cylinder 30, the drug inlet tube 31 is provided with a one-way valve 311 for one-way inflow of liquid into the needle cylinder 30, so as to ensure that the liquid drug can only enter the needle cylinder 30 along the drug inlet tube 31 in one way; the medicine inlet pipe 31 is also provided with two first bayonets 8 which are symmetrical to each other, the medicine inlet pipe 31 is also provided with a medicine storage bottle 32, the medicine storage bottle 32 is integrally formed with a threaded pipe 321, the pipe wall of the threaded pipe 321 is provided with a first buckle 9 at a position opposite to the first bayonets 8, and the first buckle 9 is clamped and matched with the first bayonets 8, so that the medicine inlet pipe is convenient to mount and dismount; the front end part of the medicine inlet pipe 31 is also integrally formed with a medicine outlet pipe 33, the end part pipe body of the needle cylinder 30 close to the medicine outlet pipe 33 is also provided with two second bayonets 80 which are symmetrical with each other, the pipe body of the medicine outlet pipe 33 is provided with two third bayonets 81 which are symmetrical with each other, the medicine outlet pipe 33 is provided with an injection nozzle 34, the inner wall of the injection nozzle 34 is provided with a third buckle 91 at the position right opposite to the third bayonets 81, the third buckle 91 is in clamping fit with the third bayonets 81, the injection nozzle 34 is provided with two fourth bayonets 82 which are symmetrical with each other, the injection nozzle 34 is provided with a protective cylinder 35, the inner wall of the protective cylinder 35 is provided with a fourth buckle 92 at the position right opposite to the fourth bayonets 82, the fourth buckle 92 is in clamping fit with the fourth bayonets 82, the front end part of the needle cylinder 30 is also provided with a rubber protective cover 36 for protecting the injection nozzle 34 inside, the rubber 36 is provided with a fixed pipe 37, the inner wall of the fixed pipe 37 is provided with a second buckle 90 at the position right to the second bayonets 80, the second buckle 90 is in clamping fit with the second bayonet 80, so that the injection nozzle 34 and the protective barrel 35 can be conveniently detached and replaced, and meanwhile, the injection nozzle 34 is communicated with the outside, so that the liquid medicine in the injection nozzle 34 can be smoothly sprayed out;

in this embodiment, first bayonet socket 8, second bayonet socket 80, third bayonet socket 81 and fourth bayonet socket 82 are second arc-shaped groove structure, first buckle 9, second buckle 90, third buckle 91 and fourth buckle 92 are arc-shaped fixture block structure, and first buckle 9, second buckle 90, third buckle 91 and fourth buckle 92 all adopt rubber materials to make, rubber materials has better elasticity, guarantee that it is when receiving the effect of external force, it can be further out of shape by the extrusion, guarantee that the buckle that corresponds can block smoothly into the bayonet socket that corresponds, and back in the bayonet socket that corresponds is blocked into to the buckle that corresponds, closely laminate between the pipe wall of medicine inlet pipe 31 and screwed pipe 321, closely laminate between the inner wall of medicine outlet pipe 33 and injection nozzle 34, guarantee that its leakproofness is better.

Furthermore, the rubber protective cover 36 is made of soft rubber material, so that the rubber protective cover 36 can be better attached to the skin of a human body when in use.

Specifically, the fixed cylinder 20, the syringe 30 and the medicine inlet tube 31 are of an integrally formed structure, so that the structure is firmer and more stable.

Furthermore, the inner wall of the fixed cylinder 20 is also provided with two second arc-shaped grooves 4 which are opposite to each other and communicated with the outside, the width of the second arc-shaped grooves 4 is equal to that of the thumb of a normal adult, and therefore, when the device is used, a worker can enable the thumb to properly penetrate through the second arc-shaped grooves 4;

the second arc-shaped groove 4 is positioned between the guide groove 201 and the needle cylinder 30, the inner wall of the fixed cylinder 20 positioned between the two second arc-shaped grooves 4 is also provided with a positioning installation groove 40, the positioning installation groove 40 is communicated with the second arc-shaped groove 4 and is concentrically arranged, an upper limiting plate 5 and a lower limiting plate 5 which are mutually symmetrical and are arranged along the length direction of the connecting rod 216 are integrally formed on the connecting rod 216, the connecting rod 216 is also sleeved with a stud 6, a through hole 60 which is arranged along the length direction of the stud 6 and is communicated with the outside is arranged in the stud 6, the connecting rod 216 passes through the through hole 60, a sliding groove 61 is arranged on the hole wall of the through hole 60 and is opposite to the position of the limiting plate 5, the limiting plate 5 is positioned in the sliding groove 61 and is in sliding connection with the sliding groove 61, the stud 6 is also sleeved with a knob 7, a second threaded hole 70 which is communicated with the outside is arranged in the knob 7, and the stud 6 passes through the second threaded hole 70 and is in threaded connection with the second threaded hole 70, the middle position of the annular surface of the knob 7 is also integrally formed with a limiting snap ring 72, the limiting snap ring 72 is positioned in the positioning installation groove 40, the size of the limiting snap ring 72 is matched with the size of the positioning installation groove 40, the limiting snap ring 72 can be stably installed in the positioning installation groove 40, meanwhile, the limiting snap ring 72 can rotate in the positioning installation groove 40, the knob 7 can be further ensured to rotate, the length of the knob 7 is smaller than that of the stud 6, the knob 7 can be rotated by using a thumb, the knob 7 can only rotate but cannot move due to the limiting snap ring 72 playing a limiting role in the knob 7, the stud 6 can be driven to move forwards or backwards when the knob 7 rotates, at the moment, the distance between the end part of the stud 6 and the boosting piston 215 is changed, the distance from the boosting piston 215 to the end part of the stud 6 is adjusted, and finally the movement distance of the boosting piston 215 is adjusted, the adjustment of the single injection dose is realized.

Further, the surface of the knob 7 is provided with a sealing cushion layer 71 tightly attached to the inner wall of the fixed cylinder 20, so that the sealing performance between the knob 7 and the inner wall of the fixed cylinder 20 is ensured to be good, the fixed cylinder 20 and the knob 7 are made of transparent materials, and the specific position of the stud 6 in the fixed cylinder 20 can be observed by a worker.

In addition, the annular surface of the limiting snap ring 72 is also provided with an anti-slip layer 721 to increase the friction force between the limiting snap ring 72 and the thumb, so that the limiting snap ring 72 can be rotated more smoothly.

It is worth to be noted that the micro motor 211 can be an LCDA4-04B202-LB632 series servo motor produced by shenzhen, a new automation technology, and the matching circuit and power supply thereof are also provided by the manufacturer; in addition, the related circuits, electronic components and modules in the present invention are all the prior art, and those skilled in the art can fully implement the present invention, and the protection content of the present invention does not relate to the improvement of software and methods.

It is worth noting that, the micro motor 211 adopts an LCDA4-04B202-LB632 series servo motor produced by new automation science and technology limited in shenzhen, and a servo system matched with the micro motor is provided by the manufacturer, so that the rotating speed of the micro motor 211 can be adjusted to adjust the forward moving speed of the bolus injection piston 217, and the effect of adjusting the injection thrust is further achieved.

In this embodiment, the lithium battery in the lithium battery mounting box 11 can be a PL103048 series lithium battery produced by new navigation technologies ltd, shenzhen, and its matching circuit and power supply are also provided by the manufacturer; in addition, the related circuits, electronic components and modules in the present invention are all the prior art, and those skilled in the art can fully implement the present invention, and the protection content of the present invention does not relate to the improvement of software and methods.

In this embodiment, the grip handle 1 is further provided with a switch 14, the micro motor 211, the lithium battery mounting box 11 and the switch 14 arranged on the grip handle 1 are electrically connected through a conducting wire in sequence, and after the switch 14 is closed, a complete closed loop is formed among the micro motor 211, the switch 14 and the lithium battery in the lithium battery mounting box 11, so that the effect of controlling the work of the micro motor 211 by closing the switch 14 is ensured.

Before the novel charging type needleless injection pushing device is used, a first buckle 9 on a medicine storage bottle 32 containing liquid medicine is clamped into a first bayonet 8 on a medicine inlet pipe 31 to complete installation of the medicine storage bottle 32 and the medicine inlet pipe 31, a proper injection nozzle 34 is selected, a third buckle 91 on the injection nozzle 34 is clamped into a third bayonet 81 on a medicine outlet pipe 33 to complete installation of the injection nozzle 34 and the medicine outlet pipe 33, then a switch 14 is closed to enable a micro motor 211 to be connected with a power supply of a lithium battery in a lithium battery installation box 11 and work, an output shaft on the micro motor rotates reversely to drive a lead screw 212 to rotate reversely, and further drive a guide pillar 213 to move towards the micro motor 211, and at the moment, a corresponding boosting piston 215, a connecting rod 216 and a corresponding injection piston 217 move backwards to realize that the liquid medicine in the medicine storage bottle 32 is sucked into a needle cylinder 30 to complete preparation work;

when the device is used, the rubber protective cover 36 is abutted against the skin of a patient, the knob 7 is rotated to drive the stud 6 to move forwards or backwards, at the moment, the distance between the end part of the stud 6 and the boosting piston 215 is changed, the distance from the boosting piston 215 to the end part of the stud 6 is adjusted, after the stud 6 is adjusted to a proper position, the switch 14 is continuously closed to enable the micro motor 211 to work, when the output shaft on the micro motor rotates forwards, the lead screw 212 is driven to rotate forwards, the guide post 213 is further driven to move towards the direction of the injection nozzle 34, at the moment, the corresponding boosting piston 215, the connecting rod 216 and the injection piston 217 move forwards, the liquid medicine in the needle cylinder 30 is extruded from the injection nozzle 34 at high speed, the injection of the patient is realized, after the injection is finished, the medicine is added, the injection operation steps are repeated, and the effect of continuous injection can be realized, solves the problems that most needleless injectors cannot carry out continuous injection and can not replace nozzles, thereby bringing certain inconvenience to users.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the preferred embodiments of the present invention are described in the above embodiments and the description, and are not intended to limit the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a novel rechargeable needleless injection thrust unit, includes grip handle (1), its characterized in that: the holding handle (1) is provided with a pushing injection device (2), and the pushing injection device (2) is provided with a medicine injection device (3); the injection device (2) comprises a fixed cylinder (20) arranged on the holding handle (1); the medicine injection device (3) comprises a needle cylinder (30) arranged at the front end part of the fixed cylinder (20); a groove (10) is formed in the holding handle (1), a lithium battery mounting box (11) is arranged in the groove (10), and a rechargeable lithium battery is arranged in the lithium battery mounting box (11); a plurality of first heat dissipation grooves (12) which are linearly arranged at equal intervals and communicated with the outside are further formed in the groove wall on one side of the groove (10), and a plurality of first arc-shaped grooves (13) which are linearly arranged at equal intervals are further formed in the holding handle (1); the inner wall of the fixed cylinder (20) is provided with two guide grooves (201) which are opposite to each other and are arranged along the length direction of the fixed cylinder (20), an injection mechanism (21) is arranged in the fixed cylinder (20), the injection mechanism (21) comprises a micro motor (211) arranged in the fixed cylinder (20), the tail end of an output shaft of the micro motor (211) is tightly welded with a lead screw (212) which is arranged horizontally, the lead screw (212) faces one side of the needle cylinder (30), a guide post (213) is arranged on the lead screw (212), a first threaded hole (2131) which is arranged along the length direction of the guide post (213) and is communicated with the outside is arranged in the guide post (213), the lead screw (212) penetrates through the first threaded hole (2131) and is in threaded connection with the first threaded hole (2131), and two guide plates (214) which are symmetrical to each other are arranged on the guide post (213), the tail end of the guide plate (214) is positioned in the guide groove (201) and is in sliding connection with the guide groove (201), the tail end of the guide post (213) far away from the micro motor (211) is provided with a boosting piston (215), the center of the side surface of the boosting piston (215) far away from the guide post (213) is provided with a connecting rod (216) which is horizontally arranged, the tail end of the connecting rod (216) is provided with a push injection piston (217), and the push injection piston (217) is positioned in the needle cylinder (30) and is in sliding connection with the needle cylinder (30); the rear end part of the fixed cylinder (20) is fixedly provided with a rear cover (22) through a plurality of fastening screws, a fixed base on the micro motor (211) is fixedly arranged on the rear cover (22) through a plurality of fastening screws, and a plurality of second heat dissipation grooves (221) communicated with the outside are also arranged in the rear cover (22); the medicine storage device is characterized in that a medicine inlet pipe (31) communicated with the medicine inlet pipe is arranged on the needle cylinder (30), a one-way valve (311) used for enabling liquid to flow into the needle cylinder (30) in a one-way mode is arranged on the medicine inlet pipe (31), two first bayonets (8) symmetrical to each other are further arranged on a pipe body of the medicine inlet pipe (31), a medicine storage bottle (32) is further arranged on the medicine inlet pipe (31), a threaded pipe (321) is arranged on the medicine storage bottle (32), a first buckle (9) is arranged on the pipe wall of the threaded pipe (321) and right opposite to the first bayonets (8), and the first buckle (9) is in clamping fit with the first bayonets (8); be close to out pencil (33) still be equipped with second bayonet socket (80) of two mutual symmetries on the tip body of needle cylinder (30), be equipped with third bayonet socket (81) of two mutual symmetries on the body of play pencil (33), be equipped with injection shower nozzle (34) on play pencil (33), just be equipped with third buckle (91) to the position of third bayonet socket (81) on the inner wall of injection shower nozzle (34), third buckle (91) with the joint cooperation between third bayonet socket (81), be equipped with four bayonet socket (82) of two mutual symmetries on injection shower nozzle (34), be equipped with a protection section of thick bamboo (35) on injection shower nozzle (34), just be equipped with fourth buckle (92) to the position of fourth bayonet socket (82) on the inner wall of a protection section of thick bamboo (35), fourth buckle (92) with the joint cooperation between fourth bayonet socket (82), the front end portion of needle cylinder (30) still is equipped with and is used for protecting injection shower nozzle (34) the rubber protection in inside The rubber protective cover (36) is provided with a fixed pipe (37), a second buckle (90) is arranged on the inner wall of the fixed pipe (37) at a position right facing a second bayonet (80), and the second buckle (90) is in clamping fit with the second bayonet (80); the inner wall of the fixed cylinder (20) is further provided with two second arc-shaped grooves (4) which are opposite to each other and communicated with the outside, the second arc-shaped grooves (4) are located between the guide groove (201) and the needle cylinder (30), the inner wall of the fixed cylinder (20) located between the two second arc-shaped grooves (4) is further provided with a positioning installation groove (40), the positioning installation groove (40) is communicated with the second arc-shaped grooves (4) and is concentrically arranged, and the connecting rod (216) is provided with two limiting plates (5) which are symmetrical up and down and are arranged along the length direction of the connecting rod (216); still the cover is equipped with double-screw bolt (6) on connecting rod (216), be equipped with in double-screw bolt (6) along double-screw bolt (6) length direction setting and with external through-hole (60) that are linked together, connecting rod (216) pass through-hole (60), just right on the pore wall of through-hole (60) the position of limiting plate (5) is equipped with spout (61), limiting plate (5) be located in spout (61) and with sliding connection between spout (61), still the cover is equipped with knob (7) on double-screw bolt (6), be equipped with second screw hole (70) that are linked together with the external in knob (7), double-screw bolt (6) pass second screw hole (70) and with threaded connection between second screw hole (70), the surface of knob (7) be equipped with seal cushion layer (71) that the inner wall of solid fixed cylinder (20) closely laminated, a limiting snap ring (72) is further arranged in the middle of the annular surface of the knob (7), and the limiting snap ring (72) is located in the positioning installation groove (40); and an anti-slip layer (721) is also arranged on the annular surface of the limiting snap ring (72).