CN113952551A

CN113952551A - Syringe without needle

Info

Publication number: CN113952551A
Application number: CN202111075257.XA
Authority: CN
Inventors: 王自会; 刘欢
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-09-14
Filing date: 2021-09-14
Publication date: 2022-01-21

Abstract

The invention relates to the technical field of injectors, in particular to a syringe needle-free injector, which comprises a cylinder barrel and a permanent magnet movably arranged in the cylinder barrel, wherein one end of the cylinder barrel is provided with an electromagnet for driving the permanent magnet to move back and forth, the outer side of the permanent magnet is sleeved with a magnetic insulating sleeve, one end of the cylinder barrel is provided with a control button electrically connected with the electromagnet, one end of the cylinder barrel, which is far away from the electromagnet, is in threaded connection with a needle cylinder, one end of the needle cylinder is provided with a high-pressure nozzle, a first piston rod is arranged in the needle cylinder, one end of the cylinder barrel is elastically connected with an annular sleeve mutually matched with the needle cylinder, and the annular sleeve is connected with a current direction switching assembly electrically connected with the electromagnet. According to the invention, the direction of current input into the electromagnet does not need to be manually switched, the permanent magnet does not need to be manually released after energy storage, the operation is simple, and the needleless injector can be conveniently controlled by one hand, so that the skin can be conveniently pressed by the other hand during injection, the convenience in use of the needleless injector is improved, and the using effect is good.

Description

Syringe without needle

Technical Field

The invention relates to the technical field of injectors, in particular to a needle-free injector.

Background

The needleless injection is also called jet injection, and is a medical apparatus and device which utilizes instantaneous high pressure generated by a power source to enable medicine in an injector to form high-speed and high-pressure jet flow through a nozzle, so that the medicine penetrates through the outer layer of the skin to the tissue layers of subcutaneous tissue, intradermal tissue and the like to release the medicine effect.

Through search, chinese patent No. CN103977482B discloses an electromagnetic energy storage type needleless injector, which includes an electrical control device and an impact injection device, wherein the impact injection device includes a cylinder having an inner cavity, a front end cover fixedly disposed at the front end of the cylinder, an impact member movably disposed in the cylinder along the front-back direction of the cylinder, and an electromagnetic driving device fixedly disposed in the cylinder for driving the impact member to move back and forth when the electromagnetic driving device is powered on.

Although the electromagnetic energy storage type needleless injector can complete needleless injection and has simple structure, small volume, light weight and low manufacturing cost, the electromagnetic energy storage type needleless injector still has the following defects:

1. in order to realize the forward and backward movement of the impact piece in the cylinder barrel, the direction of current introduced to the electromagnetic coil by the electric control device needs to be manually adjusted when the impact piece is used, and the energy-stored impact piece can be released to move forwards only by manually pressing the rear end of the pawl after the impact piece stores energy, so that the operation is complicated, the independent completion of one hand is difficult, and the use is very inconvenient;

2. the rear end of the pawl is manually pressed after the impact piece is stored with energy, so that the impact piece can be released to move forwards, the energy storage size of the impact piece cannot be known, the rear end of the pawl can be pressed at a proper time only according to experience during use, the use stability is poor, and the cylinder barrel, the rear end cover and the control mechanism are easily damaged after the impact piece is stored with excessive energy, so that the safety performance is poor;

3. when the ampoule component is used, the rear end of the pawl is touched by mistake, so that liquid medicine in the ampoule component is easily ejected out in advance, the liquid medicine is wasted, and safety accidents are easily caused;

4. after the ampoule component is installed, the ampoule component is directly exposed outside and is easy to be polluted and damaged after being contacted with foreign matters.

To this end, a needle-less injector is proposed.

Disclosure of Invention

The invention aims to provide a pinless injector, which solves the problems in the background technology by a mode of not manually switching the direction of current input into an electromagnet and not manually releasing a permanent magnet after the permanent magnet is stored.

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

a syringe without a needle comprises a cylinder barrel and a permanent magnet movably arranged in the cylinder barrel, wherein one end of the cylinder barrel is provided with an electromagnet for driving the permanent magnet to move back and forth, the outer side of the permanent magnet is sleeved with a magnetic insulating sleeve, one end of the cylinder barrel is provided with a control button electrically connected with the electromagnet, one end of the cylinder barrel, which is far away from the electromagnet, is in threaded connection with a needle cylinder, one end of the needle cylinder is provided with a high-pressure nozzle, a first piston rod is arranged in the needle cylinder, one end of the cylinder barrel is elastically connected with an annular sleeve which is mutually matched with the needle cylinder, the annular sleeve is connected with a current direction switching assembly electrically connected with the electromagnet, the current direction changes when the annular sleeve and one end of the needle cylinder are level, a positioning assembly is arranged between the annular sleeve and the cylinder barrel, the annular sleeve is connected with an auxiliary fixing assembly for fixing the needle cylinder on skin, and the cylinder barrel is provided with a limiting mechanism mutually matched with the permanent magnet, and after the permanent magnet is stored, the permanent magnet can automatically separate from the limiting mechanism and push the first piston rod to move forwards.

Before use, the annular sleeve is pushed and one end of the annular sleeve is contracted into the cylinder barrel, then the annular sleeve is fixed on the cylinder barrel by using the positioning component, the needle barrel is connected to one end of the cylinder barrel in a threaded manner after the annular sleeve is fixed, one end of the first piston rod extends into the cylinder barrel, the annular sleeve is released from the cylinder barrel after the installation of the needle barrel is finished, the annular sleeve covers the outer side of the needle barrel at the moment, one ends of the annular sleeve and the needle barrel are attached to the skin of a patient when in use, the electromagnet can be started by pressing the control button at the moment, one end of the electromagnet close to the permanent magnet generates magnetism repellent to the permanent magnet, the permanent magnet limited by the limiting mechanism starts to store energy after being pushed by magnetic force, the permanent magnet automatically breaks away from the limiting mechanism after storing energy and pushes the first piston rod to move forwards, so that liquid medicine in the needle barrel can penetrate through the outer layer of the skin and is injected into the body of the patient through the high-pressure nozzle, move down ring casing and cylinder from patient's skin after the injection finishes, ring casing can cover once more and establish the outside and the current direction change to the cylinder this moment, press control button once more and just can start the electro-magnet and make the one end that the electro-magnet is close to the permanent magnet produce the magnetism of inhaling mutually with the permanent magnet, thereby can inhale the one end to the electro-magnet tightly with the permanent magnet, not only need not the direction of manual switching input electro-magnet internal current, and need not manual release permanent magnet after the permanent magnet energy storage, easy operation and single hand just can be convenient control needleless syringe, thereby press the skin with another hand when being convenient for inject, the convenience that needleless syringe used has been promoted, excellent in use effect.

Preferably, the current direction switching assembly comprises an annular connecting plate arranged at one end of an annular sleeve, the annular connecting plate is electrically connected to the electromagnet, an annular movable groove matched with the annular connecting plate is formed in the cylinder barrel, a plurality of first springs are connected between the inner side walls of the annular connecting plate and the annular movable groove, a first connector and a second connector matched with the annular connecting plate are arranged on the inner side walls of the annular movable groove, the first connector and the second connector are connected with a battery together, and the first connector and the second connector are opposite to the battery in connection direction.

The first spring pushes the annular connecting plate and the annular sleeve to move towards the outer side of the cylinder barrel and covers the annular sleeve on the outer side of the needle barrel due to the recovery of the elasticity of the first spring, at the moment, the annular connecting plate, the first connector, the battery and the electromagnet are connected with each other, at the moment, the control button is pressed to start the electromagnet, one end, close to the permanent magnet, of the electromagnet generates magnetism attracted with the permanent magnet, so that the permanent magnet can be attracted to one end of the electromagnet, the annular sleeve is flush with one end of the needle barrel after the annular sleeve and the needle barrel are attached to the skin of a patient, at the moment, the annular connecting plate, the second connector, the battery and the electromagnet are connected with each other, the direction of current input into the electromagnet is changed, at the moment, the control button is pressed to start the electromagnet, one end, close to the permanent magnet, generates magnetism repelled with the permanent magnet, and the permanent magnet can push the first piston rod and complete injection, need not the direction of manual switching input electro-magnet internal current, convenient operation, swift, only can promote the permanent magnet and move forward and accomplish the injection when ring casing and cylinder paste tightly on skin and press control button moreover to can avoid the liquid medicine in the cylinder to be jetted out by the mistake, not only avoid the waste of liquid medicine, also can avoid the liquid medicine mistake to shoot and cause the incident, thereby promoted the security of no syringe needle syringe use.

Preferably, the locating component is including installing the connecting block on the ring casing lateral wall, the fixed block is installed to the cylinder one end that is close to the ring casing, set up the spread groove of mutually supporting with the connecting block on the fixed block, elastic connection has spacing inserted bar on the roof of fixed block, and the one end of spacing inserted bar extends to in the spread groove, set up the jack of mutually supporting with spacing inserted bar on the roof of connecting block.

Promote annular sleeve pipe and contract annular sleeve pipe's one end to the cylinder in, the connecting block follows annular sleeve pipe and removes and insert the spread groove that corresponds on the fixed block this moment, the bottom of spacing inserted bar is inserted and is established just can be with connecting block and annular sleeve pipe fixed connection on fixed block and cylinder behind the jack on the connecting block roof to be convenient for with the one end of cylinder threaded connection to cylinder, reduced the installation degree of difficulty of cylinder and first piston rod, thereby promoted the convenience that no syringe needle syringe used.

Preferably, supplementary fixed subassembly includes that the symmetry is installed at two exhaust tubes in the annular tube, evenly set up a plurality of exhaust holes that communicate with the exhaust tube on the inside wall of annular tube, install the cylinder body on the inside wall that cylinder one end was kept away from to the cylinder, the second piston rod is installed to the one end that the cylinder body is close to the cylinder, and the one end fixed connection of second piston rod is on the permanent magnet, outlet duct and intake pipe are installed to the one end of cylinder body, all install the check valve in outlet duct and the intake pipe, the one end of outlet duct extends to the outside of cylinder, be connected with the connecting pipe between intake pipe and two exhaust tubes.

The annular sleeve and the needle cylinder are attached to the skin of a patient, the electromagnet pushes the permanent magnet to move forwards to pull the second piston rod to move and pump air between the annular sleeve and the skin out through the air pumping hole, the air pumping pipe, the connecting pipe and the air inlet pipe, so that the annular sleeve and the needle cylinder can be sucked on the skin of the patient, the connection tightness and the connection stability of the needle cylinder and the skin are improved, and the injection effect of the syringe without the needle head is improved.

Preferably, stop gear is including installing the mounting box on the cylinder roof, movable mounting has the installation piece in the mounting box, install on the diapire of installation piece and support the pole with permanent magnet mutually supporting, and the bottom that supports the pole is the cambered surface, be connected with the second spring between the top of installation piece and the mounting box.

The second spring can push the mounting block and the abutting rod to move downwards and block the bottom end of the abutting rod at one side of the permanent magnet due to the recovery of the elastic force of the second spring, the permanent magnet can extrude the cambered surface of the abutting rod and push the abutting rod to move upwards after energy storage, the abutting rod can be pushed to move upwards to the top end of the permanent magnet after the permanent magnet is fully stored, so that the permanent magnet can move forwards and push the first piston rod to complete injection conveniently, the permanent magnet after energy storage is not required to be manually released, the operation is convenient, the permanent magnet can automatically separate from the abutting rod and move forwards after energy storage, and the damage to the cylinder barrel after the energy storage of the permanent magnet is too large can be avoided.

Preferably, the both ends of second spring are connected with first connecting block and second connecting block respectively, first connecting block and second connecting block are all installed respectively on the roof of mounting box inboard and the roof of installation piece through the screw, the distance meter is installed to one side of mounting box, the bottom of distance meter is equipped with the push rod, and the push rod of distance meter bottom supports on the roof of mounting box, the access door is installed to one side of mounting box.

The permanent magnet extrusion of holding ability supports the pole, the push rod that the installation piece can extrude the distance meter bottom and shows thrust on the distance meter in real time when installation piece and second spring rebound, the thrust that shows just can't reach the thrust of minimum requirement on the distance meter after the elasticity of second spring worsens, consequently, the suggestion of changing the second spring can in time be sent, the permanent magnet is not enough energy storage just can promote and support the pole and remove to the top of permanent magnet when the thrust that shows on the distance meter can't reach the thrust of minimum requirement, just can guarantee just can promote after the permanent magnet is enough energy storage to promote after the second spring that in time changes elasticity worsens and support the upside that the pole removed to the permanent magnet, the promotion effect of permanent magnet to first piston rod has been improved, thereby the injection effect of no syringe needle syringe has been improved.

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

1. the direction of current in the input electromagnet does not need to be manually switched, the permanent magnet does not need to be manually released after energy storage, the needle-free injector can be conveniently controlled by a single hand, operation is simple, and the skin is pressed by the other hand when injection is facilitated, the convenience in use of the needle-free injector is improved, and the using effect is good.

2. Need not the direction of manual switching input electro-magnet internal current, convenient operation, swift, only can promote the permanent magnet and move forward and accomplish the injection when ring casing and cylinder paste tightly on skin and press control button moreover to can avoid the liquid medicine in the cylinder to be jetted out by the mistake, not only avoid the waste of liquid medicine, also can avoid the liquid medicine mistake to shoot and cause the incident, thereby promoted the security of no syringe needle syringe use.

3. The annular sleeve and the needle cylinder are attached to the skin of a patient, the electromagnet pushes the permanent magnet to move forwards to pull the second piston rod to move and pump air between the annular sleeve and the skin out through the air pumping hole, the air pumping pipe, the connecting pipe and the air inlet pipe, so that the annular sleeve and the needle cylinder can be sucked on the skin of the patient, the connection tightness and the connection stability of the needle cylinder and the skin are improved, and the injection effect of the syringe without the needle head is improved.

4. The permanent magnet after the energy storage is not only not required to be manually released, the operation is convenient, but also the permanent magnet can automatically break away from the abutting rod and move forwards after the energy storage, so that the damage to the cylinder barrel after the energy storage of the permanent magnet is overlarge can be avoided, the service life of the syringe without the needle head is prolonged, and the use safety of the syringe without the needle head is further improved.

Drawings

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

FIG. 2 is a schematic side view of the present invention;

FIG. 3 is a schematic side view of the syringe mounted after the annular cannula is fixed according to the present invention;

FIG. 4 is a schematic side view of the syringe assembly after release of the annular collar;

FIG. 5 is a side elevational view in cross-section of the present invention with the annular cannula and barrel applied to the skin;

FIG. 6 is a sectional view showing the structure of the side surface of the cylinder after completion of the injection of the medicinal solution;

FIG. 7 is a side sectional view showing the construction of the cylinder block, the second piston rod, the intake pipe, the exhaust pipe and the connecting pipe portion according to the present invention;

FIG. 8 is a connection view of the annular connection plate, the first connection head, the second connection head and the battery portion of the invention;

FIG. 9 is an enlarged view of part A of the structure of the present invention;

FIG. 10 is an enlarged view of part B of the present invention.

In the figure: 1. a cylinder barrel; 2. a permanent magnet; 3. an electromagnet; 4. a magnetic insulation sleeve; 5. a control button; 6. a needle cylinder; 7. a first piston rod; 8. an annular sleeve; 9. an annular connecting plate; 10. an annular movable groove; 11. a first spring; 12. a first connector; 13. a second connector; 14. a battery; 15. connecting blocks; 16. a fixed block; 17. connecting grooves; 18. a limiting inserted rod; 19. a jack; 20. an air exhaust pipe; 21. an air exhaust hole; 22. a cylinder body; 23. a second piston rod; 24. an air outlet pipe; 25. an air inlet pipe; 26. a connecting pipe; 27. mounting a box; 28. mounting blocks; 29. a support rod; 30. a second spring; 31. a first connection block; 32. a second connecting block; 33. a screw; 34. a thrust gauge; 35. an access door.

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 device 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, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise. Furthermore, the terms "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 to 10, the present invention provides a needle-less injector, which has the following technical scheme:

a syringe without a needle head comprises a cylinder barrel 1 and a permanent magnet 2 movably arranged in the cylinder barrel 1, one end of the cylinder barrel 1 is provided with an electromagnet 3 for driving the permanent magnet 2 to move back and forth, the outer side of the permanent magnet 2 is sleeved with an insulating magnetic sleeve 4, one end of the cylinder barrel 1 is provided with a control button 5 electrically connected with the electromagnet 3, one end of the cylinder barrel 1 far away from the electromagnet 3 is in threaded connection with a needle barrel 6, one end of the needle barrel 6 is provided with a high-pressure nozzle, the needle barrel 6 is internally provided with a first piston rod 7, one end of the cylinder barrel 1 is elastically connected with an annular sleeve 8 mutually matched with the needle barrel 6, the annular sleeve 8 is connected with a current direction switching component electrically connected with the electromagnet 3, the annular sleeve 8 and one end of the needle barrel 6 are level and level, the current direction changes, a positioning component is arranged between the annular sleeve 8 and the cylinder barrel 1, the annular sleeve 8 is connected with an auxiliary fixing component for fixing the needle barrel 6 to skin, the cylinder barrel 1 is provided with a limiting mechanism matched with the permanent magnet 2, and the permanent magnet 2 can automatically break away from the limiting mechanism after energy storage and push the first piston rod 7 to move forwards.

Before use, the annular sleeve 8 is pushed firstly, one end of the annular sleeve 8 is contracted into the cylinder barrel 1, then the annular sleeve 8 is fixed on the cylinder barrel 1 by using the positioning component, the needle barrel 6 is connected to one end of the cylinder barrel 1 in a threaded manner after the annular sleeve 8 is fixed, one end of the first piston rod 7 extends into the cylinder barrel 1, the annular sleeve 8 is released from the cylinder barrel 1 after the installation of the needle barrel 6 is finished, the annular sleeve 8 covers the outer side of the needle barrel 6 at the moment, when the annular sleeve 8 and one end of the needle barrel 6 are attached to the skin of a patient, at the moment, the electromagnet 3 can be started by pressing the control button 5, one end of the electromagnet 3 close to the permanent magnet 2 generates magnetism repellent to the permanent magnet 2, the permanent magnet 2 limited by the limiting mechanism starts to store energy after being pushed by magnetic force, the permanent magnet 2 automatically breaks away from the limiting mechanism after storing energy and pushes the first piston rod 7 to move forwards, thereby can pierce through the skin and pour into the patient internal with the liquid medicine in the cylinder 6 through high pressure nozzle, move down ring casing 8 and cylinder 6 from patient's skin after the injection finishes, ring casing 8 can cover once more and establish the outside and the current direction change of cylinder 6 this moment, press control button 5 once more and just can start electromagnet 3 and make electromagnet 3 be close to the one end of permanent magnet 2 and produce the magnetism of inhaling mutually with permanent magnet 2, thereby can inhale permanent magnet 2 to the one end of electromagnet 3 tightly, not only need not the direction of manual switching input electric current in electromagnet 3, and need not manual release permanent magnet 2 after the permanent magnet 2 energy storage, easy operation and one hand just can be convenient control needleless syringe, thereby press the skin with another hand when being convenient for inject, the convenience of using needleless syringe has been promoted, excellent in use effect.

Referring to fig. 5, 8 and 9, the current direction switching assembly includes an annular connecting plate 9 mounted at one end of an annular sleeve 8, the annular connecting plate 9 is electrically connected to the electromagnet 3, an annular movable groove 10 matched with the annular connecting plate 9 is formed in the cylinder 1, a plurality of first springs 11 are connected between the annular connecting plate 9 and the inner side wall of the annular movable groove 10, a first connector 12 and a second connector 13 matched with the annular connecting plate 9 are mounted on the inner side wall of the annular movable groove 10, a battery 14 is connected to the first connector 12 and the second connector 13, and the connection directions of the first connector 12 and the second connector 13 are opposite to the connection direction of the battery 14.

The first spring 11 can push the annular connecting plate 9 and the annular sleeve 8 to move towards the outer side of the cylinder 1 and cover the annular sleeve 8 at the outer side of the needle cylinder 6 due to the recovery of the elasticity, at the moment, the annular connecting plate 9, the first connecting head 12, the battery 14 and the electromagnet 3 are connected with each other, at the moment, the electromagnet 3 can be started by pressing the control button 5, and the end, close to the permanent magnet 2, of the electromagnet 3 generates magnetism attracted with the permanent magnet 2, so that the permanent magnet 2 can be attracted to one end of the electromagnet 3, the annular sleeve 8 and the needle cylinder 6 are attached to the skin of a patient, then the annular sleeve 8 is flush with one end of the needle cylinder 6, at the moment, the annular connecting plate 9, the second connecting head 13, the battery 14 and the electromagnet 3 are connected with each other, the direction of current input into the electromagnet 3 is changed, at the moment, the electromagnet 3 can be started by pressing the control button 5, and the end, close to the permanent magnet 2, generates magnetism repelled with the permanent magnet 2, thereby be convenient for permanent magnet 2 promotes first piston rod 7 and accomplishes the injection, need not the direction of the interior electric current of manual switching input electro-magnet 3, convenient operation, swiftly, and only can promote permanent magnet 2 and move forward and accomplish the injection when annular sleeve 8 and cylinder 6 paste tightly on skin and press control button 5, thereby can avoid the liquid medicine in the cylinder 6 to be jetted out by the mistake, the waste of liquid medicine has not only been avoided, also can avoid the liquid medicine mistake to jet and cause the incident, thereby the security of no syringe needle syringe use has been promoted.

As an embodiment of the present invention, referring to fig. 3, 5 and 9, the positioning assembly includes a connecting block 15 installed on an outer side wall of the annular sleeve 8, a fixing block 16 is installed at one end of the cylinder 1 close to the annular sleeve 8, a connecting groove 17 matched with the connecting block 15 is formed in the fixing block 16, a limiting insertion rod 18 is elastically connected to a top wall of the fixing block 16, one end of the limiting insertion rod 18 extends into the connecting groove 17, a side wall of a bottom end of the limiting insertion rod 18 is an inclined surface, the connecting block 15 pushes the limiting insertion rod 18 to move upward after extruding the inclined surface of the bottom end of the limiting insertion rod 18, so that the connecting block 15 is conveniently inserted into the connecting groove 17, and a jack 19 matched with the limiting insertion rod 18 is formed in the top wall of the connecting block 15.

Promote annular sleeve 8 and contract annular sleeve 8's one end to cylinder 1 in, connecting block 15 moves along annular sleeve 8 this moment and inserts in the spread groove 17 that corresponds on the fixed block 16, just can be with connecting block 15 and annular sleeve 8 fixed connection on fixed block 16 and cylinder 1 after the bottom of spacing inserted bar 18 is inserted and is established in the jack 19 on connecting block 15 roof, thereby be convenient for with the one end of cylinder 6 threaded connection to cylinder 1, the installation degree of difficulty of cylinder 6 and first piston rod 7 has been reduced, thereby the convenience of syringe needle-free syringe use has been promoted.

As an embodiment of the present invention, referring to fig. 5, 7 and 9, the auxiliary fixing assembly includes two air exhaust pipes 20 symmetrically installed in the annular sleeve 8, a plurality of air exhaust holes 21 communicated with the air exhaust pipes 20 are uniformly formed on an inner side wall of the annular sleeve 8, a cylinder 22 is installed on an inner side wall of the cylinder 1 far from one end of the cylinder 6, a second piston rod 23 is installed at one end of the cylinder 22 close to the cylinder 6, one end of the second piston rod 23 is fixedly connected to the permanent magnet 2, an air outlet pipe 24 and an air inlet pipe 25 are installed at one end of the cylinder 22, check valves are installed on the air outlet pipe 24 and the air inlet pipe 25, one end of the air outlet pipe 24 extends to the outer side of the cylinder 1, and a connecting pipe 26 is connected between the air inlet pipe 25 and the two air exhaust pipes 20.

The annular sleeve 8 and the needle cylinder 6 are attached to the skin of a patient, when the electromagnet 3 pushes the permanent magnet 2 to move forwards, the second piston rod 23 is pulled to move and air between the annular sleeve 8 and the skin is pumped out through the air pumping hole 21, the air pumping pipe 20, the connecting pipe 26 and the air inlet pipe 25, so that the annular sleeve 8 and the needle cylinder 6 can be tightly sucked on the skin of the patient, the tightness and the stability of the connection between the needle cylinder 6 and the skin are improved, and the injection effect of the needle-free injector is improved.

Referring to fig. 2, 3 and 10, as an embodiment of the present invention, the limiting mechanism includes a mounting box 27 mounted on the top wall of the cylinder 1, a mounting block 28 is movably mounted in the mounting box 27, a supporting rod 29 matched with the permanent magnet 2 is mounted on the bottom wall of the mounting block 28, the bottom end of the supporting rod 29 is an arc surface, and a second spring 30 is connected between the top end of the mounting block 28 and the mounting box 27.

The second spring 30 can push the mounting block 28 and the abutting rod 29 to move downwards and block the bottom end of the abutting rod 29 at one side of the permanent magnet 2 due to the recovery of the elastic force of the second spring, the permanent magnet 2 can press the arc surface of the abutting rod 29 after energy storage and push the abutting rod 29 to move upwards, and the abutting rod 29 can be pushed to move upwards to the top end of the permanent magnet 2 after the permanent magnet 2 is fully stored, so that the permanent magnet 2 can move forwards and push the first piston rod 7 to complete injection, the permanent magnet 2 after energy storage is not required to be manually released, the operation is convenient, and the permanent magnet 2 can automatically separate from the abutting rod 29 and move forwards after energy storage, so that the cylinder barrel 1 can be prevented from being damaged after the permanent magnet 2 is excessively stored, the service life of the syringe without the needle is prolonged, and the use safety of the syringe without the needle is further improved.

Referring to fig. 2, 3 and 10, as an embodiment of the present invention, a first connecting block 31 and a second connecting block 32 are respectively connected to two ends of a second spring 30, the first connecting block 31 and the second connecting block 32 are respectively mounted on a top wall of an inner side of a mounting box 27 and a top wall of a mounting block 28 through screws 33, a thrust gauge 34 is mounted on one side of the mounting box 27, a push rod is arranged at a bottom end of the thrust gauge 34, the push rod at the bottom end of the thrust gauge 34 abuts against the top wall of the mounting block 28, an access door 35 is mounted on one side of the mounting box 27, and the second spring 30 can be conveniently mounted and dismounted through the access door 35, so that the second spring 30 can be conveniently replaced.

The energy-storing permanent magnet 2 extrudes the abutting rod 29, when the mounting block 28 and the second spring 30 move upwards, the mounting block 28 can extrude a push rod at the bottom end of the thrust gauge 34 and display the thrust on the thrust gauge 34 in real time, when the elasticity of the second spring 30 is deteriorated, the thrust displayed on the thrust gauge 34 cannot reach the thrust with the lowest requirement, so that a prompt for replacing the second spring 30 can be sent in time, when the thrust displayed on the thrust gauge 34 cannot reach the thrust with the lowest requirement, the permanent magnet 2 can push the abutting rod 29 to move to the top end of the permanent magnet 2 without sufficient energy storage, and after the second spring 30 with deteriorated elasticity is replaced in time, the abutting rod 29 can be pushed to move to the upper side of the permanent magnet 2 after the permanent magnet 2 is sufficient energy storage, so that the pushing effect of the permanent magnet 2 on the first piston rod 7 is improved, and the injection effect of the syringe without a needle is improved.

The working principle is as follows: before use, the annular sleeve 8 is pushed and one end of the annular sleeve 8 is contracted into the cylinder 1, at the moment, the connecting block 15 moves along with the annular sleeve 8 and is inserted into the corresponding connecting groove 17 on the fixing block 16, the connecting block 15 and the annular sleeve 8 can be fixedly connected onto the fixing block 16 and the cylinder 1 after the bottom end of the limiting insertion rod 18 is inserted into the insertion hole 19 on the top wall of the connecting block 15, the needle cylinder 6 is connected to one end of the cylinder 1 in a threaded manner and one end of the first piston rod 7 is extended into the cylinder 1 after the annular sleeve 8 is fixed, the annular sleeve 8 is released from the cylinder 1 after the installation of the needle cylinder 6 is finished, at the moment, the first spring 11 pushes the annular connecting plate 9 and the annular sleeve 8 to move towards the outer side of the cylinder 1 and covers the annular sleeve 8 on the outer side of the needle cylinder 6 due to self-elastic force restoration, at the moment, the annular connecting plate 9, the first connector 12, the battery 14 and the electromagnet 3 are connected with each other, at the moment, the control button 5 is pressed to start the electromagnet 3, so that the end, close to the permanent magnet 2, of the electromagnet 3 generates magnetism which is attracted to the permanent magnet 2, the permanent magnet 2 can be attracted to one end of the electromagnet 3, the annular sleeve 8 and the needle cylinder 6 are attached to the skin of a patient, then the annular sleeve 8 is flush with one end of the needle cylinder 6, at the moment, the annular connecting plate 9, the second connector 13, the battery 14 and the electromagnet 3 are connected with each other, the direction of current input into the electromagnet 3 is changed, at the moment, the electromagnet 3 can be started by pressing the control button 5, one end, close to the permanent magnet 2, of the electromagnet 3 generates magnetism which is repelled from the permanent magnet 2, the second spring 30 pushes the mounting block 28 and the abutting rod 29 to move downwards due to the recovery of the elasticity of the second spring, the bottom end of the abutting rod 29 is blocked at one side of the permanent magnet 2, and the arc surface of the abutting rod 29 is pushed to move upwards by the permanent magnet 2 after the energy is stored, can promote after the abundant energy storage of permanent magnet 2 and support the top that pole 29 upwards moved to permanent magnet 2, thereby be convenient for permanent magnet 2 to move forward and promote first piston rod 7 and move forward, thereby can pierce through the skin with the liquid medicine in the cylinder 6 through high pressure nozzle and pour into the patient in vivo not only need not the direction of manual switching input electro-magnet 3 internal current, and need not manual release permanent magnet 2 after the energy storage of permanent magnet 2, easy operation and single hand just can be convenient control needleless syringe, thereby press the skin with another hand when being convenient for inject, the convenience of needleless syringe use has been promoted.

The electric elements in the document are electrically connected with an external main controller and 220V mains supply through a transformer, the main controller can be a conventional known device controlled by a computer and the like, the product model provided by the invention is only used according to the structural characteristics of the product, the product can be adjusted and modified after being purchased, so that the product is more matched with and accords with the technical scheme of the invention, the product model is a technical scheme of the optimal application of the technical scheme, the product model can be replaced and modified according to the required technical parameters, and the product model is familiar to the technical personnel in the field, so that the technical scheme provided by the invention can clearly obtain the corresponding use effect.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a syringe needle-free injector, includes cylinder (1) and movable mounting permanent magnet (2) in cylinder (1), electro-magnet (3) of drive permanent magnet (2) back-and-forth movement are installed to the one end of cylinder (1), the outside cover of permanent magnet (2) is equipped with magnetic insulation cover (4), control button (5) its characterized in that are connected with electro-magnet (3) electricity are installed to the one end of cylinder (1): one end of the cylinder barrel (1) far away from the electromagnet (3) is connected with a needle cylinder (6) through screw threads, one end of the needle cylinder (6) is provided with a high-pressure nozzle, a first piston rod (7) is arranged in the needle cylinder (6), one end of the cylinder barrel (1) is elastically connected with an annular sleeve (8) which is mutually matched with the needle cylinder (6), the annular sleeve (8) is connected with a current direction switching component which is electrically connected with the electromagnet (3), and the current direction changes when the annular sleeve (8) and one end of the needle cylinder (6) are flush, a positioning component is arranged between the annular sleeve (8) and the cylinder barrel (1), an auxiliary fixing component for fixing the needle cylinder (6) on the skin is connected on the annular sleeve (8), the cylinder barrel (1) is provided with a limiting mechanism which is matched with the permanent magnet (2), and the permanent magnet (2) can automatically separate from the limiting mechanism after energy storage and push the first piston rod (7) to move forwards.

2. A needle-less injector according to claim 1, characterized in that: current direction switches subassembly is including installing annular connecting plate (9) in annular sleeve (8) one end, and annular connecting plate (9) electricity is connected on electro-magnet (3), annular movable groove (10) of mutually supporting with annular connecting plate (9) have been seted up in cylinder (1), be connected with a plurality of first springs (11) between the inside wall of annular connecting plate (9) and annular movable groove (10), install first connector (12) and second connector (13) of mutually supporting with annular connecting plate (9) on the inside wall of annular movable groove (10), be connected with battery (14) jointly on first connector (12) and second connector (13), and the connection direction of first connector (12) and second connector (13) and battery (14) is opposite.

3. A needle-less injector according to claim 1, characterized in that: locating component is including installing connecting block (15) on ring conduit (8) lateral wall, fixed block (16) are installed to cylinder (1) one end that is close to ring conduit (8), set up spread groove (17) of mutually supporting with connecting block (15) on fixed block (16), elastic connection has spacing inserted bar (18) on the roof of fixed block (16), and in the one end of spacing inserted bar (18) extended to spread groove (17), set up jack (19) of mutually supporting with spacing inserted bar (18) on the roof of connecting block (15).

4. A needle-less injector according to claim 1, characterized in that: the auxiliary fixing component comprises two air suction pipes (20) which are symmetrically arranged in the annular sleeve (8), a plurality of air exhaust holes (21) communicated with the air exhaust pipe (20) are uniformly arranged on the inner side wall of the annular sleeve (8), a cylinder body (22) is arranged on the inner side wall of one end of the cylinder barrel (1) far away from the needle cylinder (6), one end of the cylinder body (22) close to the needle cylinder (6) is provided with a second piston rod (23), one end of the second piston rod (23) is fixedly connected on the permanent magnet (2), one end of the cylinder body (22) is provided with an air outlet pipe (24) and an air inlet pipe (25), one-way valves are respectively arranged on the air outlet pipe (24) and the air inlet pipe (25), one end of the air outlet pipe (24) extends to the outer side of the cylinder barrel (1), and a connecting pipe (26) is connected between the air inlet pipe (25) and the two air exhaust pipes (20).

5. A needle-less injector according to claim 1, characterized in that: stop gear is including installing mounting box (27) on cylinder (1) roof, movable mounting has installation piece (28) in mounting box (27), install on the diapire of installation piece (28) and support pole (29) with permanent magnet (2) mutually supporting, and support the bottom of pole (29) and be the cambered surface, be connected with second spring (30) between the top of installation piece (28) and mounting box (27).

6. A needle-less injector according to claim 5, characterized in that: the both ends of second spring (30) are connected with first connecting block (31) and second connecting block (32) respectively, all install respectively on the roof of mounting box (27) inboard roof and mounting block (28) through screw (33) first connecting block (31) and second connecting block (32), thrust gauge (34) is installed to one side of mounting box (27), the bottom of thrust gauge (34) is equipped with the push rod, and the push rod of thrust gauge (34) bottom supports on the roof of mounting block (28), access door (35) are installed to one side of mounting box (27).