CN111001061B

CN111001061B - Needleless painless injection device

Info

Publication number: CN111001061B
Application number: CN201811450375.2A
Authority: CN
Inventors: 崔尧成
Original assignee: Ptech
Current assignee: Ptech
Priority date: 2018-10-05
Filing date: 2018-11-30
Publication date: 2021-11-30
Anticipated expiration: 2038-11-30
Also published as: KR20200039206A; CN111001061A; KR102199724B1

Abstract

The present invention relates to a painless injection device that injects an injection medicine with a constant air pressure and can significantly reduce generated noise while minimizing the noise effect on a subject such as an infant or the like. The needle-free painless injection device of the invention comprises: a valve body, a valve member, an internal space, a gas-filled container, an operation knob, a cylinder, a piston member, an injection liquid unit, and a gas flow path forming mechanism.

Description

Needleless painless injection device

Technical Field

The present invention relates to a needle-free and painless injection device, and more particularly, to a needle-free and painless injection device which can always inject an injection medicine with a constant air pressure, and can remarkably reduce noise generated at the time of medicine injection while minimizing the influence of noise on a subject such as an infant, and particularly, is very useful in the treatment of animals such as small birds which may die due to impact noise, and gives a minute vibration to the skin surface to be injected and the injection medicine injected into the subcutaneous tissue to further relieve pain, and can more rapidly complete the injection and absorption in the body of the injection medicine injected into the subcutaneous tissue.

Background

Generally, a syringe is understood to be a tool for a nurse or doctor to inject a medicine directly into a patient.

Fig. 1 is a block diagram showing a general syringe. As shown in fig. 1, a conventional syringe includes a needle 1 and pushes a piston 2 to inject medicine in a cylinder 3 into a patient.

However, in the case where a user who needs to perform injections a plurality of times per day, for example, a diabetic needs to perform injections in an untimely manner even in a home care rather than a hospital, there is a difficulty that not only the injection is performed using a general syringe (a syringe formed only by an outer cylinder into which a needle is inserted and a plunger), but also the injection itself is necessary to perform the injection into his or her body.

Further, in the case of an ordinary patient who performs injection on himself or herself and an infant having a tendency of hyperactivity, there is considerable difficulty if there is no excellent injection technique, and in the case of a thick needle, there is a difficulty in solving the problem of pain at the time of skin penetration.

On the other hand, as a means for solving such problems, the following syringes have been proposed: a general syringe is elastically inserted into the sleeve to perform instantaneous injection by spring force or air pressure, or a painless syringe in which a fine hole (about 0.1mm in diameter) is provided at the front end of the syringe instead of a needle, and pressure can be applied from the rear of the syringe to inject injection into the skin.

However, in the case of a conventional painless syringe in which a piston is struck by spring ejection, when a spring is loaded in a compressed state for instantaneous striking, a very large force is required for compressing the spring, and therefore, an additional loading jig (jig) is required, and the spring is used after being separated after being combined with the loading jig each time the spring is loaded in the compressed state, which causes a problem that the use is complicated and time-consuming.

Further, the conventional spring-ejection type painless syringe cannot be applied to a case where a small amount of injection is injected a plurality of times such as skin beauty as a method of injecting the injection once when the injection is struck once, and a striking sound generated at the time of striking the spring is large to give discomfort to a subject.

On the other hand, as another example of the conventional painless syringe, in the case of a painless syringe that strikes the piston by air pressing, there is a problem that a sufficient pressing force is not provided when striking the piston, and a large striking sound is generated by pressing of compressed gas in a pressing path, thereby causing a sense of discomfort.

In addition, the conventional painless syringe has the following problems: the injection medicine is injected into the subcutaneous tissue simply by the pressurizing force and is injected at a fast speed, so that the injection liquid is not sufficiently injected into the subcutaneous tissue and a part thereof is ejected to the outside, and there is a problem that some pain may be relatively caused to a sensitive subject or animal.

(Prior art document)

(patent document)

Korean granted patent publication No. 10-0777146 (2007.11.19. publication)

Korea Utility model publication No. 20-1994-0006930 (1994.10.07. announcement)

Korean Utility model publication No. 20-1997-0001378 (1997.03.04. announcement)

Korean laid-open patent publication No. 10-2001-0067582 (2001.07.13 publication)

Disclosure of Invention

(problems to be solved by the invention)

In order to solve the above-described conventional problems, it is an object of the present invention to provide a painless injection device that injects an injection medicine at a constant gas pressure all the time by filling with gas, thereby solving the following problems: the inventor of the present invention has created and registered a problem of gas supply by a liquefied gas vaporization container registered, that is, a problem of a decrease or weakening of gas pressure due to consumption of liquefied gas in the liquefied gas vaporization container with use time.

Further, another object of the present invention is to provide a needle-free painless injection device which can remarkably reduce noise generated at the time of drug injection, thus minimizing the influence of noise on a subject such as a young child, and is very useful in animal treatment of small-sized birds or the like which may die due to impact noise, and further relieve pain by imparting minute vibration to the skin surface to be injected and the injected drug injected into the subcutaneous tissue, and can more rapidly complete injection and absorption of the injected drug into the subcutaneous tissue.

Still another object of the present invention is to provide a needle-free painless injection device which can apply a minute vibration to the surface of the skin to be injected when painless injection is performed, thereby further relieving pain, and can more rapidly complete injection and in vivo absorption of the injected drug injected into the subcutaneous tissue, thereby being convenient to use and applicable to various fields such as not only medical treatment but also skin beauty.

The technical problems of the present invention are not limited to the aspects described above, and those skilled in the art to which the present invention pertains can clearly understand other technical problems not mentioned from the following descriptions.

(means for solving the problems)

According to an aspect of the present invention to achieve the above-described object and other features, there is provided a needleless painless injection device comprising: a valve body having an inner space in a length direction; a valve member slidably provided in the internal space of the valve body, the valve member having a plurality of protrusions formed on an outer edge thereof, the protrusions being in airtight contact with an inner wall of the valve body and sliding thereon; a gas-filled container having a nozzle portion, one end portion of the gas-filled container communicating with the internal space of the valve member, and a gas-filled port formed at the other end portion of the gas-filled container for filling gas; an operation knob provided at an end of the valve member exposed to the valve body; a cylinder coupled to one side of the valve body, one end of the cylinder being closed, the cylinder having an inner space in a longitudinal direction; a piston member having one end portion in airtight contact with the internal space of the cylinder and slidably movable, the piston member having a piston rod provided at one end portion; an injection unit detachably coupled to the cylinder body, and provided with an injection piston rod contacting the piston rod or being coupled to the groove; and a gas flow path forming mechanism for selectively communicating and closing the internal space of the valve body, the internal space of the cylinder and the external air side to move the piston member forward and backward by filling the gas injected from the gas filling container and pressing the operation knob.

According to the present invention, the gas-filled container may be detachably provided in the valve body.

According to the present invention, the valve body and the gas-filled container may be formed integrally.

According to the present invention, the gas-filled container further includes a filled gas confirmation mechanism for confirming the presence or absence of the gas filled inside.

According to the present invention, the valve body and the cylinder are integrally formed by being covered with a housing, a long groove having a predetermined length is formed in a longitudinal direction from one end of the valve member along a central portion, the other end of the valve member extends to an outside of the valve body, and a protrusion portion formed on an outer edge of the valve member may include a plurality of first extending flange portions, and protrude radially outward at the central portion; a plurality of second extending flange portions that protrude radially outward from an end portion on a side facing the gas-filled container; and a sliding seal member which is provided in mounting grooves formed by the first extended flange portion and the second extended flange portion, respectively, and which is slidably brought into contact with an inner surface of the valve body to maintain airtightness.

According to the present invention, the gas flow path forming mechanism may include: a first communication hole for communicating the internal space of the valve body with the outside air side; a second communication hole formed in the valve member to communicate the inner space of the valve body with the long groove of the valve member; a first communication path formed on one side of the valve body and communicating with or blocking an inner space on one side of the valve body in accordance with sliding of the valve member; a second communication passage formed on the other side of the valve body and configured to allow the inner space on the other side of the valve body to communicate with or block the first communication hole in accordance with the sliding of the valve member; an inflow communication path formed in the cylinder and communicating the first openable communication path with an inner space on the other side of the cylinder; and a discharge communication path formed between the cylinder and the valve body to communicate the second open/close communication path with the internal space on one side of the cylinder.

According to the present invention, the piston member includes: a piston head which is in contact with the inner wall of the cylinder body and moves in a sliding manner; a piston rod extending from the piston head; and a sliding seal member provided on an outer edge of the piston head and slidably contacting an inner surface of the cylinder to maintain airtightness, wherein the injection unit includes: an injector having an injection piston rod; and a rod protecting cap having a syringe coupling portion with one end coupled to the syringe and the other end detachably coupled to the cylinder, wherein the cylinder and the rod protecting cap are coupled to each other by a bayonet fixing (bayonet mounting).

According to the present invention, the piston member further includes a cushioning member provided at an edge of at least one of the two faces of the piston head.

According to the present invention, further comprising: an acoustic wave oscillator provided on one side of an end of the injection liquid unit, and configured to vibrate the injection liquid injected into the skin and the subcutaneous tissue by acoustic wave oscillation; a control circuit unit for controlling the acoustic wave oscillator in conjunction with an operation of the operation knob; and a power supply source for supplying power to the acoustic wave oscillator.

According to the present invention, the control circuit unit includes: a switch unit for detecting an operation or an on/off operation of the operation knob; an operation control unit for receiving an operation command from the switch unit and controlling the sound wave generated by the sound wave oscillator, in accordance with an operation of the operation knob; and a level adjustment unit for adjusting the level of the sound wave oscillation generated in the sound wave oscillator.

(Effect of the invention)

The needleless painless injection device according to the present invention provides the following effects.

First, the present invention has the effect of improving usability and reliability of the product by injecting the injection medicine with a constant air pressure all the time.

Second, the present invention has an effect that it is possible to rapidly inject the injection medicine with sufficient pressure and to remarkably reduce the generated noise when the injection medicine is instantaneously injected using the air pressure.

Thirdly, the present invention has an effect that it can minimize the influence of noise on a subject such as a young child, and is very effectively applied to the treatment of animals such as small birds that may die due to impact noise.

Fourth, the present invention is convenient to use, and can be applied not only to medical treatment of human beings and animals, but also to various aspects such as skin beauty, etc., thereby having an effect of improving usability.

Fifth, the present invention has an effect of further relieving pain by applying fine vibration to the skin surface to be injected at the time of injection, and more rapidly completing injection and in vivo absorption of the injection drug injected into the subcutaneous tissue.

The effects of the present invention are not limited to the above-mentioned ones, and other technical problems not mentioned can be clearly understood by those skilled in the art from the following loading.

Drawings

Fig. 1 is a block diagram showing a general syringe.

Fig. 2 is a perspective view of the needleless painless injection device of the present invention.

Fig. 3 is a side view of the needleless painless injection device of this invention.

Fig. 4 is a top view of the needleless painless injection device of this invention.

Fig. 5 is a sectional view taken along line a-a of fig. 4.

Fig. 6 is a cross-sectional view of the structure of the needleless painless injection device of the present invention further comprising a sonic oscillation device.

Fig. 7 is a block diagram of a control circuit portion included in the sonic oscillation device of the needleless painless injection device of the present invention.

Detailed Description

Other objects, features and advantages of the present invention will become more apparent from the following detailed description and the accompanying drawings.

Before describing the present invention, various modifications may be made, various examples may be possible, and the examples shown in the following description and drawings are not intended to limit the particular embodiments of the present invention, and all modifications, equivalents, and alternatives included within the spirit and scope of the present invention should be included.

Further, in the following description with reference to the drawings, the same structural elements are given the same reference numerals regardless of the figure numbers, and a repetitive description thereof is omitted. In describing the present invention, detailed description of the known art will be omitted if it makes unnecessary ambiguity about the gist of the present invention.

Hereinafter, a needle-free and painless injection device according to a preferred embodiment of the present invention will be described with reference to fig. 2 to 5. Fig. 2 is a perspective view of the needleless painless injection device of the present invention; fig. 3 is a side view of the needleless painless injection device of this invention; fig. 4 is a top view of the needleless painless injection device of this invention; fig. 5 is a sectional view taken along line a-a of fig. 4. In the description of the following structure, one end or one side and the other end or the other side mean terms for distinguishing right and left sides with reference to the respective drawings, and the expression of one end or the other side is used to distinguish the respective end sides.

As shown in fig. 2 to 5, the needleless painless injection device of the present invention comprises: a valve body 100 having an inner space 101 in a longitudinal direction; a valve member 200 slidably provided in an inner space of the valve body 100, and having a long groove 201 formed from one end of the valve member 200 along a longitudinal direction of a central portion thereof, and a plurality of protrusions formed on an outer edge of the other end of the valve member 200 to be in contact with and slide on an inner wall of the valve body 100, the other end extending outward of the other end of the valve body 100; a gas filling container 300 having a nozzle portion formed at one end thereof to communicate with the internal space of the valve body 100 by operation of an operation knob described below, and a gas filling port 301 formed at the other end thereof to be filled with gas; an operation knob 310 provided at the other end portion which is the exposed end portion of the valve body 100; a cylinder 400 coupled to one side of the valve body 100, one end of the cylinder 400 being closed, the cylinder 400 having an inner space 401 in a longitudinal direction; a piston member 500 having one end portion that is in airtight contact with the internal space 401 of the cylinder 400 and is capable of sliding, the piston member 500 having a piston rod 510 provided at one end portion; an injection unit 600 detachably coupled to one end of the cylinder 400, and provided with an injection piston rod 610 contacting the piston rod 510 or groove-coupled thereto; the gas flow path forming mechanism selectively communicates with and closes the internal space 101 of the valve body 100, the internal space 401 of the cylinder, and the outside (outside air side) to move the piston member 500 forward and backward by filling the gas injected from the gas-filled container 300 and pressing the operation knob 310.

The valve body 100 and the cylinder 400 are integrally covered with the outer case or housing 10, and the outer case or housing 10 can cover the gas-filled container and expose only the filling port 301 of the gas-filled container 300.

Among them, it is preferable that a plurality of grip grooves 11 are formed at one side of the housing or case 10 to enable a user to easily grip the housing or case 10. In the drawings, there is shown a case where a grip groove 11 is formed at a lower side of a housing or shell 10.

The valve body 100 has an internal space 101 (for example, a circular internal space) having a length longer than that of the valve member 200, and the other end of the internal space 101 communicates with the outside, and a coupling port detachably coupled to a nozzle portion of the gas charging container 300 is formed at one end.

A valve cover 102, which slidably supports one end of the valve member 200 at the center thereof, is provided at one end of the valve body 100.

The valve body 100 is formed with a first communication hole 801 (see fig. 4) for communicating the internal space 101 of the valve body 100 with the outside (outside air side). The communication hole 801 formed in the valve body 100 constitutes a gas flow passage forming mechanism described later, and the communication relationship thereof will be described below in the description of the gas flow passage forming mechanism.

Although described later, the valve body 100 may be integrally formed with the gas-filled container 300.

The valve member 200 has a cylindrical body portion, and a long groove 201 having a predetermined length is formed along a central portion from one end surface of the cylindrical central portion. The other end of the long groove 201 is closed.

The projection formed on the outer edge of the valve member 200 includes a plurality of first extended flange portions 210 projecting radially outward at the center, a plurality of second extended flange portions 220 projecting radially outward at one end, and a sliding seal member (e.g., O-ring) 230 provided in a mounting groove formed by the first extended flange portions 210 and the second extended flange portions 220, respectively, and slidably contacting the inner surface of the valve body 100 to maintain airtightness.

The valve member 200 is provided with a second communication hole 802 for communicating the long groove 201 with the internal space 101 of the valve body 100, and an outer edge space 803 formed at a predetermined position of the valve body 100 is a component constituting a gas flow path forming mechanism to be described below. The specific communication relationship between the second communication hole 802 and the outer edge space 803 will be described in detail below in the description of the gas flow path forming mechanism.

Next, the gas charging container 300 is formed with a nozzle portion that is coupled to the coupling port 102 of the valve body 100 and opened to discharge the gas charged in the gas charging container 300 from the nozzle portion of the gas charging container 300.

At this time, the gas filling into the gas filling container 300 is performed from the gas filling port 301 by a separate filling container (liquefied gas container or reusable container), and the filling gas uses carbon dioxide, but the present invention is not limited thereto.

The gas filling port 301 of the gas filling container 300 is formed by a known method (check valve method). For example, the gas filling port 301 of the gas filling container 300 is configured to: if the filling port of the filling container is pushed into the gas filling port 301, the filling pipe constituting the gas filling port 301 moves backward and the liquefied gas in the filling container is sprayed and filled in the gas filling container 300, and if the filling container is separated from the gas filling port 301, the filling pipe of the gas filling port 301 returns to its original position and closes the gas filling port 301.

The nozzle portion of the gas filling container 300 is configured to discharge a filling gas (for example, gaseous carbon dioxide) while being coupled to the coupling port 102 of the valve body 100, and a detailed description thereof will be omitted.

Further, in the present invention, the inside of the gas filling container 300 may be provided with a filling gas confirmation mechanism for confirming whether the gas is filled or not. For example, the filled gas checking means may be formed by a pressure gauge, and any configuration may be used as long as it can check whether or not the inside of the gas filling container 300 is filled with gas.

Further, in the present invention, the valve body 100 may be formed of a gas filling container integrated type valve body integrated with the gas filling container 300. That is, the coupling port of the valve body 100 and the nozzle portion of the gas filling container may be formed integrally.

The cylinder 400 has an inner space 401 formed at one side thereof, a guide partition 410 communicating with the inner space 401 formed at the other side thereof, a guide hole formed in the guide partition for guiding the piston rod 510 of the piston member 500 in an airtight manner, and a coupling portion 420 formed at one end thereof to be detachably coupled to a rod protection cap 620 of the injection unit 600, which will be described later.

The other end of the cylinder 400 is combined with a cylinder cover 402 to close the other end in an airtight manner. Wherein the outer edge of the cylinder cover 402 is provided with an O-ring 403 capable of closing the cylinder 400 in an airtight manner.

Further, the piston member 500 provided in the cylinder 400 includes: a piston rod 510 that slides in an airtight manner along a guide hole of the guide partition 410 of the cylinder 400; a piston head 520 formed at the other end of the piston rod 510 and contacting an inner wall surface of the cylinder 400; and a sliding sealing member 530 (e.g., an O-ring) provided at an outer edge of the piston head 520 and contacting an inner face of the cylinder block 400 in a sliding manner while maintaining airtightness.

Further, the piston member 500 may further include a buffer member 540 provided at an edge portion of a rear surface (a surface opposite to a side constituting the base end portion of the piston rod 520) of the piston head 520. The cushioning member 540 may be provided on the front surface of the piston head 520 (the surface on the side constituting the proximal end portion of the piston rod 510) or the surface of the guide partition wall 410 facing the piston head 520.

In the cushioning member 540 thus provided, when the piston head 520 formed of a relatively large diameter compared to the diameter of the piston rod 510 slides in the internal space 401 of the cylinder 400 at a strong moment, the piston head 520 is cushioned by the cushioning member 540 without directly colliding with the cylinder 400, so that durability can be ensured.

The injection liquid unit 600 includes: a syringe 610 having an injection piston rod 611; and a rod protecting cap 620 having an injector coupling portion with one end coupled to the injector 610 and the other end detachably coupled to the coupling portion 420 of the cylinder 400.

The coupling between the coupling portion 420 of the cylinder 400 and the syringe coupling portion of the rod protecting cap 620 is not particularly limited as long as the two components are detachably coupled. For example, the coupling is performed by a bayonet fixing (bayonet mounting), and more specifically, in order to easily attach and detach the cylinder 400 and the injection unit 600, the coupling portion 430 of the cylinder 400 is formed in a cylindrical shape, and the syringe coupling portion is formed in a cylindrical shape and is externally inserted to an outer edge of the coupling portion 430 and rotated to one side, thereby achieving locking.

The gas flow path forming mechanism includes: a first communication hole 801 for communicating the inner space 101 of the valve body 100 with the outside (outside air side); a second communication hole 802 formed in the valve member 200 to communicate the internal space 101 of the valve body 100 with the long groove 201 of the valve member 200; a first communication path 803 that is formed on one side of the valve body 100 and is formed so as to be in a communicating and blocking relationship with the internal space 101 on one side of the valve body 101 in accordance with the sliding movement of the valve member 200; a second communication path 804 formed on the other side of the valve body 100 and formed to allow the inner space 101 on the other side of the valve body 101 to communicate with and close the first communication hole 801 in accordance with the sliding movement of the valve member 200; an inflow communication path 805 for communicating the first open-close communication path 803 with the internal space 401 on the other end portion (i.e., the other end of the piston head 520) side of the cylinder 400; and a discharge communication path 806 formed in the cylinder 400 and the valve body 100 and communicating the second opening/closing communication path 804 with the internal space 401 on the one end side (i.e., the piston rod 510 side) of the cylinder 400.

As shown in fig. 3, in a state where the operation knob 310 is pressed to advance the valve member 200, the first communication path 803 communicates with the other internal space 101 of the valve body 100, and the first communication path 803 communicates with the internal space 401 of the other end of the cylinder 400 via the inflow communication path 805, whereby the piston member 500 is moved forward to hit the piston rod 611 of the injection unit 600.

At this time, the first communication path 803 is hermetically isolated from the second communication path 804 by the first extended flange portion 210 of the valve member 200 provided with the sliding seal member 230, and the gas (air) in the internal space 401 at one end of the cylinder 400 communicates with the internal space 101 at one side of the valve body 100 through the discharge communication path 806, and the internal space 101 at one side of the valve body 100 is discharged to the outside from the first communication hole 801 through the second communication path 804.

On the other hand, when the pressing state of the operation knob 310 is released, the valve member 200 is moved backward (in the direction opposite to the pressing direction) by the force of the gas ejected from the gas-filled container 300, and the communication relationship between the valve body 100 and the cylinder 400 is closed, and in this state, the injection liquid unit 600 is replaced and kept in the standby state. At this time, an additional filling container is connected to the gas filling port 301 of the gas filling container 300 to fill the gas filling container 300 with gas.

Specifically, the communication relationship of the gas flow path forming mechanism according to the forward and backward movement operation of the valve member 200 will be described.

The gas discharged from the gas filling container 300 fills the internal space 101 of the valve body 100, moves the valve member 200 to the rear side (left side in the drawing), and fills the long groove 201 of the valve member 200 and the internal space 101 of the valve body 100 with the gas among the first communication hole 801, the second communication hole 802, the first communication passage 803, the second communication passage 804, the inflow communication passage 805, and the discharge communication passage. At this time, the internal space 101 of the valve body 100 and the first communication path 803 have a state of being closed by the extended flange portion (first extended flange portion 210). This state becomes a standby state (loading state).

In such a standby state, when the user presses the operation knob 310 to move the valve member 200 forward (rightward in the drawing), the internal space 101 in the valve body 100 communicates with the first communication path 803, and the gas hits the piston head 520 via the inflow communication path 805 to move the piston member 500, thereby ejecting the solution from the solution unit 600. At this time, air (gas) in the other internal space 401 of the cylinder 400 passes through the discharge communication path 806 and the second communication path 804 and is discharged from the first communication hole 801 to the outside. This state becomes the striking state (injection state).

After that, when the user releases the force for pressing the operation knob 310, and connects an additional filling container to the gas filling port 301 of the gas filling container 300 to fill the gas filling container 300 with gas, the standby state (the loaded state) is restored. Of course, the gas remaining in the gas filling container 300 is discharged before the filling container is filled with the gas, and the gas filling container is in a standby state, but the standby state of the syringe for 1-time gas filling may be different depending on the volume of the gas filling container 300. That is, the capacity of the gas-filled container 300 may be changed so that only 1 time can be used for 1 filling, or N times (N is a natural number of 2 or more) can be used for 1 filling.

As described above, in the present invention, when the operation knob is operated, the gas ejected from the gas-filled container 300 by the gas flow path forming mechanism is transmitted to one side of the cylinder 400 at a rapid and strong ejection pressure in a standby state (i.e., a loaded state) to strike the piston member 500, thereby enabling the injection of the injection liquid to be performed instantaneously and without noise.

Further, in the valve body 100 and the cylinder 400 formed with the above-described gas flow path forming mechanism, in the case where a groove portion or a groove channel is formed on the surface of the valve body 100 or the cylinder 400 of the portion of the gas flow path forming mechanism where the gas flows in and out according to the manufacturing or design matter, a cap or a flat finishing member or a flat gasket for flat processing may be provided.

On the other hand, the needleless painless injection device of the present invention may further include a liquid medicine injection control mechanism which controls (e.g., uniformly moves) the sliding movement of the piston member 500 to maintain the injection of the injection liquid using the injection liquid unit 600 at a constant rate although the duration is very short, when the piston member 500 instantaneously moves (for less than 1 second) by the pressure of the pressure-vaporized gas (filling gas).

Although not shown in the drawings, the above-described chemical liquid injection control mechanism includes, as an embodiment: a plurality of stopper grooves formed on an outer edge of the piston rod 510 of the piston member 500 with an interval in a longitudinal direction thereof; a mounting hole formed in one side of the guide long hole of the cylinder 400 in a direction perpendicular to the guide long hole; a ball stopper provided in the mounting hole so as to be linearly movable; a cap coupled to cover an upper end of the mounting hole; and an elastic member (i.e., a coil spring) disposed between the ball stopper and the cap to elastically support the ball stopper.

Further, the mounting hole included in the chemical solution injection control mechanism and the cap may be screw-coupled to adjust the elastic force of the elastic member by clockwise or counterclockwise rotation of the cap, and a design elastic mark indicating an acting elastic force of the elastic member according to a coupling pitch of the cap with an outer surface of a cylinder coupled to the cap as a reference line may be marked on an outer surface of the cap.

Thereby, the engagement pitch of the cap is adjusted to adjust the elastic force of the elastic member, so that the pressing force to the spherical stopper of the piston rod can be adjusted.

The moving speed is controlled by the liquid medicine injection control mechanism, so that the noise can be reduced, the scar on the injection surface can be reduced, and the pain can be further relieved.

On the other hand, as shown in fig. 6 and 7, the needleless painless injection device according to the present invention may further include a sonic oscillation device.

Fig. 6 is a sectional view showing a configuration in which the needleless and painless injection device of the present invention further includes a sonic wave generator, and fig. 7 is a diagram showing a configuration of a control circuit portion included in the sonic wave generator of the needleless and painless injection device of the present invention in a block form.

The acoustic wave oscillation device includes: a sonic oscillator 1000 which is detachably coupled to the rod protective cap 620 and performs sonic oscillation; a control circuit unit 1100 that controls the acoustic wave oscillator 1000 in conjunction with an operation of the operation knob 310; and a power supply source (or battery unit) 1200 that supplies power to the acoustic wave oscillator 1000.

The acoustic wave oscillator 1000 is not particularly limited as long as it is configured to be capable of acoustic wave oscillation, and for example, a plurality of diaphragms may be provided on a substrate and an acoustic wave oscillator may be provided inside the diaphragms.

As shown in fig. 7, the control circuit portion 1110 includes: a switch unit 1111 for detecting an operation of the operation knob 310 or an on (on)/off (off) operation; an operation control unit 1112 for receiving an operation command from the switch unit 1111 and controlling the sound wave generated by the sound wave oscillator 1000 in accordance with the operation of the operation means; and a level adjustment section 1113 for adjusting the level of the acoustic wave oscillation generated by the acoustic wave oscillator 1000. Wherein the horizontal adjustment part 1113 may be omitted.

In the acoustic wave oscillator thus configured, the switch unit 1111 detects the injection operation of the operation knob 310, the detected signal (operation command signal) is transmitted to the control circuit unit 1100, and the control circuit unit 1100 controls the acoustic wave oscillator 1000 to oscillate a predetermined level of acoustic wave.

The sound wave generated from the sound wave oscillator 1000 finely vibrates the surface of the injection skin to reduce pain, and also finely vibrates the injection drug injected into the subcutaneous tissue to smoothly permeate into the subcutaneous tissue, thereby being rapidly absorbed into the body.

Further, the power supply source 1200 may be constituted by a cable to which external power can be connected, but preferably, the power supply source is constituted by a battery unit (charging battery unit) provided inside to ensure portability and usability.

The needleless painless injection device according to the present invention as described above has the following advantages: that is, the injection medicine can be injected at a constant air pressure all the time to improve usability and reliability of the product, and when the injection medicine is instantaneously injected by the air pressure, the injection medicine can be rapidly injected with a sufficient pressure and the generated noise can be remarkably reduced, and the influence of noise on a subject such as an infant can be minimized, and in particular, the present invention is very effectively applied to the treatment of animals such as small birds which may die due to impact noise.

In addition, the present invention is convenient to use, and can be applied not only to medical treatment of humans and animals, but also to various aspects such as skin beauty, so that it can improve usability, further relieve pain by applying fine vibration to the skin surface to be injected at the time of injection, and more rapidly complete injection and in vivo absorption of the injected drug injected into the subcutaneous tissue.

The embodiments and the drawings described in this specification are only exemplary in describing some of the technical ideas included in the present invention. Therefore, it should be understood that the embodiments disclosed in the present specification are not intended to limit the technical ideas of the present invention but to describe the present invention. Modifications and embodiments that can be easily inferred by those skilled in the art within the scope of the technical idea included in the specification and drawings of the present invention should be considered as included in the scope of the present invention.

(description of reference numerals)

100: valve body

101: inner space of valve body

200: valve member

201: elongated slot

210. 220, and (2) a step of: extension flange part

230. 530: sliding seal member

300: gas-filled container

301: gas filling port

310: operation knob

400: cylinder body

401: inner space of cylinder

500: piston component

510: piston rod

520: piston head

540: buffer member

600: injection unit

610: syringe with a needle

611: piston rod for injection

801. 802: communicating hole

803. 804: opening and closing communication path

805: inflow communication path

806: discharge communication path

1000: acoustic wave oscillator

1110: control circuit unit

1111: switch part

1112: operation control unit

1113: horizontal adjusting part

1200: a battery part.

Claims

1. A needle-free and painless injection device, comprising:

a valve body having an inner space in a length direction;

a valve member slidably provided in the internal space of the valve body, the valve member having a plurality of protrusions formed on an outer edge thereof, the protrusions being in airtight contact with an inner wall of the valve body and sliding thereon;

a gas filling container having a nozzle portion, one end portion of the gas filling container communicating with the internal space of the valve member, and the other end portion of the gas filling container having a gas filling port for filling gas;

an operation knob provided at an end of the valve member exposed to the valve body;

a cylinder coupled to one side of the valve body, one end of the cylinder being closed, the cylinder having an inner space in a longitudinal direction;

a piston member having one end portion that is in airtight contact with the internal space of the cylinder and slidably moves, the piston member having a piston rod provided at one end portion thereof;

an injection unit detachably coupled to the cylinder and provided with an injection piston rod contacting the piston rod or groove-coupled thereto;

and a gas flow path forming mechanism for selectively communicating and closing the internal space of the valve body, the internal space of the cylinder and the external air side to move the piston member forward and backward by filling the gas injected from the gas filling container and pressing the operation knob.

2. The needle-free and painless injection device of claim 1,

the gas-filled container is detachably provided in the valve body.

3. The needle-free and painless injection device of claim 1,

the valve body is formed integrally with the gas-filled container.

4. The needle-free painless injection device of any of claims 1 to 3,

the gas-filled container further includes a filled gas confirmation mechanism for confirming the presence or absence of the gas filled inside.

5. The needle-free and painless injection device of claim 1,

the valve body and the cylinder are covered by a housing to form a single body,

a long groove having a predetermined length is formed in a longitudinal direction from one end of the valve member along a central portion thereof, and the other end of the valve member extends outward of the valve body,

the projection formed on the outer edge of the valve member includes:

a plurality of first extending flange portions protruding radially outward at a central portion;

a plurality of second extending flange portions that protrude radially outward from an end portion on a side facing the gas-filled container; and

and a sliding seal member which is provided in the mounting groove formed by the first extended flange portion and the second extended flange portion, and slidably contacts the inner surface of the valve body to maintain airtightness.

6. The needle-free and painless injection device of claim 5,

the gas flow path forming mechanism includes:

a first communication hole for communicating the internal space of the valve body with the outside air side;

a second communication hole formed in the valve member to communicate the inner space of the valve body with the long groove of the valve member;

a first communication path formed on one side of the valve body and communicating with or blocking an inner space on one side of the valve body in accordance with sliding of the valve member;

a second communication passage formed on the other side of the valve body and configured to allow the inner space on the other side of the valve body to communicate with or block the first communication hole in accordance with the sliding of the valve member;

an inflow communication path formed in the cylinder and communicating the first openable communication path with an inner space on the other side of the cylinder; and

and a discharge communication path formed between the cylinder and the valve body to communicate the second open/close communication path with the internal space on one side of the cylinder.

7. The needle-free and painless injection device of claim 1,

the piston member includes: a piston head which is in contact with the inner wall of the cylinder body and moves in a sliding manner; a piston rod extending from the piston head; and a sliding seal member provided on an outer edge of the piston head and slidably contacting an inner surface of the cylinder to maintain airtightness,

the injection unit comprises: an injector having an injection piston rod; and a rod protecting cap having an injector coupling part having one end coupled to the injector and the other end detachably coupled to the cylinder,

the cylinder body is combined with the rod protective cap in a bayonet fixing manner.

8. The needle-free and painless injection device of claim 7,

the piston member further includes a cushioning member provided at an edge of at least one of the two faces of the piston head.

9. The needle-free and painless injection device of claim 1,

further comprising:

an acoustic wave oscillator provided on one side of an end of the injection liquid unit, and configured to vibrate the injection liquid injected into the skin and the subcutaneous tissue by acoustic wave oscillation;

a control circuit unit for controlling the acoustic wave oscillator in conjunction with an operation of the operation knob; and

and a power supply source for supplying power to the acoustic wave oscillator.

10. The needle-free and painless injection device of claim 9,

the control circuit unit includes:

a switch unit for detecting an operation or an on/off operation of the operation knob;

an operation control unit for receiving an operation command from the switch unit and controlling the sound wave generated by the sound wave oscillator in accordance with an operation of the operation knob; and

and a level adjustment unit for adjusting the level of the acoustic wave oscillation generated in the acoustic wave oscillator.