阅读说明：本技术 一种无针注射器 (Needleless injector ) 是由 刘苏衡 吴荣荣 于 2019-10-25 设计创作，主要内容包括：本发明提供一种无针注射器,包括注射器本体、设于注射器本体中的左右动力块、安瓿注射管以及动力机械平衡系统,所述左右动力块在动力机械平衡系统控制下挤压安瓿注射管中的药液完成注射,左右动力块的运动合力可调节为零或接近零。本发明通过动力机械平衡系统的设计,可使得左右动力块在相分离或相向运动时均可实现左右动力块两者同时运动,且在运动过程中各个动力块的运动合力可调节为零或接近零,这样既可保证在无针注射过程中减少后坐力对使用者的影响,特别是减少对被注射者带来不舒适感觉,对无针技术的运用推广有相当大的意义。(The invention provides a needleless injector, which comprises an injector body, a left power block, a right power block, an ampoule injection tube and a power mechanical balance system, wherein the left power block and the right power block are arranged in the injector body, the left power block and the right power block squeeze liquid medicine in the ampoule injection tube under the control of the power mechanical balance system to complete injection, and the resultant force of motion of the left power block and the right power block can be adjusted to be zero or close to zero. The invention can realize the simultaneous movement of the left power block and the right power block when the left power block and the right power block are separated or move oppositely through the design of the power mechanical balance system, and the resultant force of the movement of each power block can be adjusted to be zero or close to zero in the movement process, thereby not only ensuring that the influence of recoil on a user in the needleless injection process is reduced, but also particularly reducing the uncomfortable feeling brought to the injected person, and having great significance for the application and popularization of the needleless technology.)

1. A needleless injector, comprising: the injection device comprises an injector body, left and right power blocks (1.1, 1.2) arranged in the injector body, an ampoule injection tube (1.5) and a power mechanical balance system, wherein the left and right power blocks (1.1, 1.2) extrude liquid medicine in the ampoule injection tube (1.5) under the control of the power mechanical balance system to complete injection, and the resultant force of the motion of the left and right power blocks (1.1, 1.2) can be adjusted to be zero or close to zero.

2. The needle free injector of claim 1, wherein: the left power block and the right power block (1.1, 1.2) are controlled by a power mechanical balance system to move in a separated mode, an injection pushing rod (1.3) corresponding to the piston (1.4) is installed on the right power block (1.2), when the left power block and the right power block (1.1, 1.2) move in a separated mode, the right power block (1.2) is far away from the left power block (1.1) to drive the injection pushing rod (1.3) on the right power block to push the piston (1.4) in the ampoule injection tube (1.5), and the piston (1.4) further extrudes liquid medicine in the ampoule injection tube (1.5) to complete an injection function; or the left power block (1.1), the right power block (1.1, 1.2) move in opposite directions under the control of a power mechanical balance system, an injection pushing rod (2.1) corresponding to the piston (1.4) is installed on the left power block (1.1), when the left power block (1.1), the right power block (1.2) move in opposite directions, the left power block (1.1) moves towards the right power block (1.2), so that the injection pushing rod (2.1) on the left power block is driven to push the piston (1.4) in the ampoule injection tube (1.5), and the piston (1.4) further extrudes the liquid medicine in the ampoule injection tube (1.5) to complete the injection function.

3. The needle free injector of claim 1, wherein: the power mechanical balance system comprises a power spring (3.7) arranged between a left power block (1.1) and a right power block (1.2) and a control piece for limiting and releasing the power spring (3.7); the control piece comprises slots (3.6, 3.8) on left and right power blocks (1.1, 1.2) and steel marbles (3.2, 3.3) which can protrude into the slots (3.6, 3.8), the steel marbles (3.2, 3.3) are installed on the injector body, the left and right power blocks (1.1, 1.2) are positioned in the injector body, the slots (3.6, 3.8) of the left and right power blocks (1.1, 1.2) are just positioned at the positions of the steel marbles (3.2, 3.3) after the power spring (3.7) is compressed and stored, and the steel marbles (3.2, 3.3) protrude into the corresponding slots (3.6, 3.8), so that the power spring (3.7) is fixed in the middle part of the injector; openings (3.1, 3.4) are arranged at two ends of the injector body, an operator inserts the openings (3.1, 3.4) at two ends of the injector body through an auxiliary device, and the power spring (3.7) is compressed and stored through the left power block (1.1) and the right power block (1.2).

4. The needle free injector of claim 1, wherein: the power mechanical balance system comprises a power spring (3.7) arranged between a left power block (1.1) and a right power block (1.2), left and right power block deflector rods (5.2, 5.3) arranged on the left and right power blocks (1.1, 1.2), a spiral curve wheel (5.6) and a speed reducing motor (5.1) capable of driving the spiral curve wheel (5.6) to rotate, wherein the spiral curve of the spiral curve wheel (5.6) corresponds to the left and right power block deflector rods (5.2, 5.3) and is provided with high points (5.5, 5.7) and low points (5.4, 5.8), one ends of the left and right power block deflector rods (5.2, 5.3) are connected with the left and right power blocks (1.1, 1.2), the other ends of the left and right power blocks (5.2, 5.3) are arranged between the high points (5.5, 5.7) and the low points (5.4, 5.8) of the pair of the spiral curve wheel (5.6), when the spiral curve wheel rotates, the left and right power block deflector rods (5.2, 5.3) can be positioned between the high points (5.4, 5.8) and the lower points (5., 5.8) of the movable part.

5. The needle free injector of claim 1, wherein: the power mechanical balance system comprises a first positioning spring (7.1) positioned between a left power block (1.1) and a right power block (1.1, 1.2), a second positioning spring (7.2) and a second positioning spring (7.3) positioned at two ends of the left power block (1.1) and the right power block (1.2), wherein a cavity where the first positioning spring (7.1) is positioned is communicated with an inlet (7.4), a cavity where the second positioning spring (7.2) and the second positioning spring (7.3) are positioned is respectively communicated with a first outlet (7.5) and a second outlet (7.6), the inlet (7.4) is used for being connected with high-pressure gas, the first outlet (7.5) is communicated with the second outlet (7.6), the left positioning spring (7.1), the right positioning spring (7.2) and the left positioning spring, the right positioning spring (7.1, 7.2, 7.3) are in contact with an inner cavity of an injector body (3.9), so that the left power block (1) and the right power block (1.2) are limited in the middle of.

6. The needle free injector of claim 1, wherein: the power mechanical balance system comprises a left electromagnetic device and a right electromagnetic device, and comprises a left electromagnet (9.1, 9.7), a right buffer spring (9.2, 9.6), a left electromagnet and a right electromagnet (9.1, 9.7), wherein the electromagnets (9.1, 9.7) are fixed on the inner wall of a cavity of the injector body at intervals, the left permanent magnetic core and the right permanent magnetic core (9.3, 9.5) are respectively arranged in the middle of the left electromagnet and the right electromagnet (9.1, 9.7) as a left power block and a right power block, the ends of the left permanent magnetic core and the right permanent magnetic core (9.3, 9.5) are respectively connected with the left buffer spring and the right buffer spring (9.2, 9.6), when the left electromagnet and the right electromagnet (9.1, 9.7) are started by electrifying, the left electromagnet and the right electromagnet (9.1, 9.7) form two magnets with opposite magnetic poles with the left permanent.

7. The needle free injector of claim 1, wherein: the power mechanical balance system comprises a left coil (10) and a right coil (11) which are respectively arranged on left and right power blocks (1.1 and 1.2), a connecting arm clamped on the left power block (1.1) and a connecting disc (1.8), wherein the left power block (1.1) and the right power block (1.2) are composed of permanent magnetic elements, and the running distance and the force of the left and right power blocks (1.1 and 1.2) are accurately controlled by controlling the sizes of the electrified currents of the left coil (10) and the right coil (11), so that the resultant force during injection is reduced to be minimum; the connecting arm is fixed in left power piece (1.1) by last linking arm (1.6) and lower linking arm (1.7) joint from top to bottom, and the other end of linking arm is equipped with connection pad (1.8), and connection pad (1.8) are connected with injection pushing rod (1.3), and injection pushing rod (1.3) can move piston (1.4) that promote ampoule syringe (1.5) under the linking arm drives.

8. The needle free injector of claim 1, wherein: the left power block (1.1) and the right power block (1.2) move oppositely under the control of a power mechanical balance system, a saccule (1.9) capable of being squeezed is arranged between the left power block (1.1) and the right power block (1.2), the left power block (1.1) and the right power block (1.2) move oppositely to squeeze the saccule (1.9) under the action of the power mechanical balance system, liquid in the saccule (1.9) flows out in any direction according to the guiding of an outflow port, the power for liquid outflow can be used as power for pushing an injection pushing rod (1.3), the injection pushing rod (1.3) pushes a piston (1.4) of an ampoule injection tube (1.5), and liquid medicine in the ampoule injection tube (1.5) is squeezed to complete an injection function.

9. The needle free injector of claim 1, wherein: the ampoule filling machine is characterized by further comprising a liquid storage device (11.1), the left power block and the right power block (1.1 and 1.2) move oppositely under the control of a power mechanical balance system, a bladder (1.9) capable of being extruded is arranged between the left power block (1.1) and the right power block (1.2), the left power block (1.1) and the right power block (1.2) move oppositely to extrude the bladder (1.9) under the action of the power mechanical balance system, the bladder (1.9) is connected with two guide pipes, the outer end of one guide pipe is connected with the liquid storage device (11.1) through a first half-way valve (11.2), and the outer end of the other guide pipe is connected with the ampoule injection pipe (1.5) through a second half-way valve (1.12).

10. The needle free injector of claim 1, wherein: the ampoule is characterized by further comprising a special ampoule, the left power block (1.1) and the right power block (1.2) move oppositely under the control of a power mechanical balance system, and the special ampoule comprises an ampoule injection tube (1.5), a left beating core (1.13) and a right beating core (1.14) which are arranged at two ends of an inner cavity of the ampoule injection tube (1.5), an upper half-way valve (1.52) and a lower half-way valve (1.53) which are communicated with the inner cavity of the ampoule injection tube (1.5), wherein the upper cavity of the upper half-way valve (1.52) is communicated with a liquid medicine storage container (11.1) through a communicating tube (12), the lower cavity outlet of the lower half-way valve (1.53) is used as an ampoule injection port (1.51), and the left power block (1.1) and the right power block (1.2) can move inwards in a combined manner to beat the left beating core (1.13) and the; or the special ampoule comprises an ampoule injection tube (1.5), a left striking core (1.13) and a right striking core (1.14) which are arranged at two ends of an inner cavity of the ampoule injection tube (1.5), an expandable medicine bag (1.15) which is arranged in the inner cavity of the ampoule injection tube (1.5), an upper half-way valve (1.52) which is communicated with the expandable medicine bag (1.15) and a pressure-limiting circulation valve (1.54), wherein an upper cavity of the upper half-way valve (1.52) is communicated with the liquid storage medicine bag (13) through a puncture needle (14), an outlet of a lower cavity of the pressure-limiting circulation valve (1.54) is used as an ampoule injection port (1.51), and the left striking core (1.13) and the right striking core (1.13) are driven by a left power block (1.1) and a right power block (1.2) and can extrude liquid medicine in the inner cavity of the ampoule injection tube (1.5) inwards, so.

Technical Field

The invention relates to the technical field of medical equipment, in particular to a needleless injector.

Background

The needle-free injection technology is a technology of directly injecting a liquid medicine into the skin by using a needle-free injector and forming a thin liquid flow through high pressure without a needle head when the medicine is injected according to a high-pressure jet principle, and the thin liquid flow penetrates the skin instantly to reach the subcutaneous part. Needleless injectors must exert very high pressure on the liquid. High kinetic energy is usually obtained by driving a power block mounted in a needleless injector to move at high speed. The power block with high kinetic energy strikes the piston of the needleless injector to transfer the force to the liquid medicine, and the liquid medicine is ejected at high speed to complete the injection process.

The kinetic energy of the power block in the needleless injector is generally generated by the motion of a compression spring, high-pressure gas, an intense electromagnetic field and the like. The kinetic energy used in the injection process in the needleless injector body is partially used for generating high pressure to the liquid, and the residual kinetic energy generates recoil to the needleless injector body. Recoil causes severe, momentary vibration of the needleless injector, which is in turn transmitted to the person and operator to be injected. Such a recoil transmitted to the user, particularly to the person to be injected, may cause an uncomfortable feeling to the person to be injected.

Therefore, in the process of needleless injection, the influence of recoil on a user is reduced, particularly the uncomfortable feeling of the user is reduced, and the application and popularization of the needleless technology are of great significance.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides a needleless injector which can reduce or eliminate recoil, thereby reducing the influence of the recoil on a user and being beneficial to the application and popularization of a needleless technology.

A needleless injector comprises an injector body, a left power block, a right power block, an ampoule injection tube and a power mechanical balance system, wherein the left power block and the right power block are arranged in the injector body, the left power block and the right power block squeeze liquid medicine in the ampoule injection tube under the control of the power mechanical balance system to complete injection, and the resultant force of motion of the left power block and the right power block can be adjusted to be zero or close to zero.

Furthermore, the left power block and the right power block are controlled by a power mechanical balance system to perform phase separation movement, an injection pushing rod corresponding to the piston is installed on the right power block, when the left power block and the right power block perform separation movement, the right power block is far away from the left power block to move, so that the injection pushing rod on the right power block is driven to push the piston in the ampoule injection tube, and the piston further extrudes liquid medicine in the ampoule injection tube to complete an injection function; or the left power block and the right power block move in opposite directions under the control of the power mechanical balance system, the injection pushing rod corresponding to the piston is installed on the left power block, and when the left power block and the right power block move in opposite directions, the left power block moves towards the right power block so as to drive the injection pushing rod on the left power block to push the piston in the ampoule injection tube, and the piston further extrudes the liquid medicine in the ampoule injection tube to complete the injection function.

Further, the power mechanical balance system comprises a power spring arranged between the left power block and the right power block and a control piece for limiting and releasing the power spring; the control piece comprises slots on the left and right power blocks and steel balls capable of protruding into the slots, the steel balls are mounted on the injector body, the left and right power blocks are positioned in the injector body, the slots of the left and right power blocks are just positioned at the steel balls after the power spring is compressed for energy storage, the steel balls protrude into the corresponding slots, and therefore the power spring is fixed in the middle of the injector; the two ends of the injector body are provided with openings, an operator inserts the openings at the two ends of the injector body through an auxiliary device, and the power spring is compressed and stored energy through the left power block and the right power block.

Furthermore, the power mechanical balance system comprises a power spring arranged between the left power block and the right power block, a left power block driving lever and a right power block driving lever arranged on the left power block and the right power block, a spiral curve wheel and a speed reduction motor capable of driving the spiral curve wheel to rotate, wherein the spiral curve of the spiral curve wheel corresponds to the left power block driving lever and the right power block driving lever and is provided with a high point and a low point, one end of the left power block driving lever and the right power block driving lever is connected with the left power block and the right power block, the other end of the left power block driving lever and the right power block driving lever is arranged between the high point and the low point of the spiral curve wheel pair.

Furthermore, a silencing energy-absorbing material is arranged at the low point of the left and right spiral curved wheels so as to reduce the impact sound of the left and right power block deflector rods and the low point of the spiral curved wheels.

Furthermore, the power mechanical balance system comprises a first positioning spring, a second positioning spring and a second positioning spring, wherein the first positioning spring is positioned between the left power block and the right power block, the second positioning spring and the second positioning spring are positioned at two ends of the left power block and the right power block, a cavity where the first positioning spring is positioned is communicated with an inlet, a cavity where the second positioning spring and the second positioning spring are positioned is respectively communicated with a first outlet and a second outlet, the inlet is used for receiving high-pressure gas, the first outlet is communicated with the second outlet, the left positioning spring, the middle positioning spring, the right positioning spring, the middle positioning spring, the left power block and the right power block are limited.

Further, the power machinery balance system comprises a left electromagnetic device and a right electromagnetic device, the left electromagnetic device and the right electromagnetic device comprise a left electromagnetic device and a right electromagnetic device, a left buffer spring and a right buffer spring, wherein the left electromagnetic device and the right electromagnetic device are fixed on the inner wall of the cavity of the injector body at certain intervals, the left permanent magnetic core and the right permanent magnetic core are respectively arranged in the middle of the left coil and the right coil as a left power block and a right power block, the ends of the left permanent magnetic core and the right permanent magnetic core are respectively connected with the left buffer spring and the right buffer spring, when the left electromagnetic device and.

Furthermore, the power mechanical balance system comprises a left coil and a right coil which are respectively arranged on the left power block and the right power block, a connecting arm and a connecting disc which are clamped on the left power block, the left power block and the right power block are composed of permanent magnetic elements, and the running distance and the force of the left power block and the right power block are accurately controlled by controlling the sizes of the electrified currents of the left coil and the right coil, so that the resultant force during injection is reduced to the minimum; the connecting arm is fixed on the left power block in a vertically clamped mode through an upper connecting arm and a lower connecting arm, a connecting disc is arranged at the other end of the connecting arm and connected with an injection pushing rod, and the injection pushing rod can move to push a piston of an ampoule injection tube under the driving of the connecting arm.

Furthermore, the left power block and the right power block move oppositely under the control of the power mechanical balance system, a saccule capable of being extruded is arranged between the left power block and the right power block, the left power block and the right power block move oppositely under the action of the power mechanical balance system to extrude the saccule, liquid in the saccule flows out in any direction according to the direction of the outflow port, the power for the liquid to flow out can be used as power for pushing the injection pushing rod, the injection pushing rod pushes the piston of the ampoule injection tube, and liquid medicine in the ampoule injection tube is extruded to complete the injection function.

The ampoule injection device is characterized by further comprising a liquid storage device, the left power block and the right power block move oppositely under the control of the power mechanical balance system, a bladder capable of being extruded is arranged between the left power block and the right power block, the left power block and the right power block move oppositely under the action of the power mechanical balance system to extrude the bladder, the bladder is connected with two guide pipes, the outer end of one guide pipe is connected with the liquid storage device through a first half-way valve, and the outer end of the other guide pipe is connected with an ampoule injection pipe through a second half-way valve.

The ampoule is characterized by further comprising a special ampoule, the left power block and the right power block move oppositely under the control of a power mechanical balance system, the special ampoule comprises an ampoule injection tube, a left hitting core and a right hitting core which are arranged at two ends of an inner cavity of the ampoule injection tube, an upper half-way valve and a lower half-way valve which are communicated with the inner cavity of the ampoule injection tube, wherein the upper cavity of the upper half-way valve is communicated with a liquid medicine storage container through a communicating tube, an outlet of the lower cavity of the lower half-way valve is used as an ampoule injection port, and the left power block and the right power block can move inwards in a combined force manner to hit the left hitting core and the right; or the special ampoule comprises an ampoule injection tube, a left beating core and a right beating core which are arranged at two ends of the inner cavity of the ampoule injection tube, an expandable medicine bag arranged in the inner cavity of the ampoule injection tube, an upper half-way valve and a pressure-limiting circulation valve, wherein the upper cavity of the upper half-way valve is communicated with the liquid storage medicine core through a puncture needle, the lower cavity outlet of the pressure-limiting circulation valve is used as an ampoule injection port, and the left beating core and the right beating core can inwards squeeze liquid medicine in the inner cavity of the ampoule injection tube under the driving of a left power block and a right power block, so that the injection function is realized.

The invention can realize the simultaneous movement of the left power block and the right power block when the left power block and the right power block are separated or move oppositely through the design of the power mechanical balance system, and the resultant force of the movement of each power block can be adjusted to be zero or close to zero in the movement process, thereby not only ensuring that the influence of recoil on a user in the needleless injection process is reduced, but also particularly reducing the uncomfortable feeling brought to the injected person, and having great significance for the application and popularization of the needleless technology.

Drawings

FIG. 1 is a schematic structural diagram of a power block set with a phase-separated motion mode according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a power block set with opposite movement according to another embodiment of the present invention;

FIG. 3 is a schematic diagram of a manual spring assembly in a compressed state according to an embodiment of the present invention;

FIG. 4 is a schematic structural view of a manual spring assembly in a cocked state according to one embodiment of the present invention;

FIG. 5 is a schematic structural view of an electric spring assembly in a compressed state according to a second embodiment of the present invention;

FIG. 6 is a schematic structural view of a power spring assembly in a cocked state according to a second embodiment of the present invention;

FIG. 7 is a schematic diagram of the pneumatic combination of the third embodiment of the present invention in its initial state;

FIG. 8 is a schematic structural view of a pneumatic assembly of a third embodiment of the present invention in a fired state;

FIG. 9 is a schematic diagram of an electromagnetic assembly according to an embodiment of the present invention in a four-start state;

FIG. 10 is a schematic structural view of the electromagnetic assembly in a firing state according to the fourth embodiment of the present invention;

FIG. 11 is a schematic structural diagram of a voice coil motor in an initial state according to a fifth embodiment of the present invention;

FIG. 12 is a schematic diagram of a voice coil motor in a cocked state according to an embodiment of the present invention;

FIG. 13 is a schematic view of a sixth embodiment of the present invention using a capsule as a cushioning member in an initial state;

FIG. 14 is a schematic structural view of a sixth embodiment of the present invention using a capsule as a cushioning member in a cocked state;

FIG. 15 is a schematic diagram of an electromagnetic assembly with a multiple-injector according to a seventh embodiment of the present invention;

FIG. 16 is a schematic diagram of a bladder injection configuration for performing multiple sequential injections in accordance with an eighth embodiment of the present invention;

FIG. 17 is a schematic diagram of a special ampoule for multiple continuous injections according to an embodiment of the present invention;

fig. 18 is a schematic structural diagram of a dedicated ampoule for multiple continuous injections according to an embodiment of the present invention.

Detailed Description

The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings.

The invention provides a needleless injector capable of reducing or eliminating recoil, which is realized by a power mechanical balance system arranged in a needleless injector body and used for pushing a needleless ampoule to move.

As shown in fig. 1 and fig. 2, an embodiment of the present invention provides a needleless injector, which includes an injector body, left and right power blocks (1.1, 1.2) disposed in the injector body, an ampoule injection tube 1.5, a piston 1.4 slidably disposed in the ampoule injection tube 1.5, and a power mechanical balance system, where the left and right power blocks (1.1, 1.2) push the piston 1.4 in the ampoule injection tube 1.5 under the control of the power mechanical balance system, and the piston 1.4 further presses the liquid medicine in the ampoule injection tube 1.5 to complete injection, and resultant forces of motions of the left and right power blocks (1.1, 1.2) can be adjusted to be zero or close to zero.

As shown in fig. 1, in the left and right power blocks (1.1, 1.2) which are in phase separation motion, an injection pushing rod 1.3 corresponding to the piston 1.4 is installed on the right power block 1.2, and when the left and right power blocks (1.1, 1.2) perform the separation motion, the right power block 1.2 is far away from the left power block 1.1 to move, so as to drive the injection pushing rod 1.3 thereon to push the piston 1.4 in the ampoule injection tube 1.5, and the piston 1.4 further squeezes the liquid medicine in the ampoule injection tube 1.5 to complete the injection function; as shown in fig. 2, in the left and right power blocks (1.1, 1.2) moving in opposite directions, the injection pushing rod 2.1 corresponding to the piston 1.4 is installed on the left power block 1.1, and when the left and right power blocks (1.1, 1.2) move in opposite directions, the left power block 1.1 moves towards the right power block 1.2, so as to drive the injection pushing rod 2.1 thereon to push the piston 1.4 in the ampoule injection tube 1.5, and the piston 1.4 further squeezes the liquid medicine in the ampoule injection tube 1.5 to complete the injection function.

It is clear that the mass of the left and right power blocks (1.1, 1.2) can be adjusted up or down as desired by the designer. And the motion starting time, the motion driving force, the motion resistance, the motion distance, the termination time and the like of the left and right power blocks (1.1, 1.2) can be adjusted, so that the motion resultant force of each power block can be adjusted to be zero or close to zero when the left and right power blocks move simultaneously.