KR101007094B1 - Drug injection device - Google Patents

Abstract

The present invention relates to a drug injector, comprising: a case formed in a rod shape, a syringe support provided on an upper portion of the case to mount a syringe, and provided inside the case to generate pressure for inserting a needle of the syringe into the skin. A needle insertion cylinder, a drug injection cylinder which is provided inside the case to generate pressure for injecting the drug stored in the syringe into the skin, and transfers the force due to the stretching operation of the drug injection cylinder to the rear end of the syringe; An exercise delivery unit for injecting a drug, wherein the exercise delivery unit includes a stick for transmitting pressure to the rear end of the syringe, first and second pedestals fixed in the case to support the stick so as to linearly reciprocate, and the stick Insertion hole is formed in the center so that it is inserted, even if the stick is moved linearly By a friction plate, and elastic behavior of the drug injection cylinder to provide a static friction is provided a structure including a displacement control for controlling the displacement of the movement of the friction plate.
By using the drug injection device as described above, the present invention provides the amount of drug injected into the skin by one cycle of stretching operation of the drug injection cylinder by adjusting the displacement that the friction plate can move using the adjustment screw of the displacement control unit and The injection speed can be finely adjusted.

Description

Drug injection device {INJECTION DEVICE}

The present invention relates to a drug injector, and more particularly, to a drug injector formed in a rod-like structure to minimize the exposure of the syringe needle to the outside to remove the patient's rejection or fear of the gun type drug injector. .

Mesotherapy is a method of injecting or injecting a drug into the dermal layer of the skin using microneedle. It was developed in 1952 by French physician Michel Pistor.

The purpose of mesotherapy is widely used for cosmetic purposes such as obesity treatment through lipolysis, skin pain relief, hair regeneration, weight loss, wrinkle removal, wound and acne treatment, etc. The number of procedures has increased significantly.

Drug injectors applied to mesotherapy are devices that inject drugs into the skin at high speed using electricity or pneumatic pressure, also called 'meso gun'.

Mecondition is electrically or pneumatically priced and can cost $ 3000- $ 5000 per unit.

Driving these conditions requires power to operate the syringe when the syringe needle is inserted into the skin and when a certain amount of drug is injected after insertion.

The main power sources are electric and pneumatic.

Compared with the electric main condition, the pneumatic main condition is generally preferred to the electric main condition because the electric power is provided with sufficient power and the temperature rise is small even after continuous use for a long time.

An example of such pneumatic condition is disclosed in Korean Patent No. 10-0597814 (registered on June 30, 2006, hereinafter referred to as 'Patent Document 1').

1 is a front view showing the internal structure of the pneumatic drug injection gun according to Patent Document 1.

As shown in FIG. 1, the pneumatic drug injection gun according to Patent Document 1 has a trigger body 1 for operation and a gun body 2 having a port for air introduction, and a side inside the gun body 2. A syringe pressurizing body (5) and a catheter insertion cylinder mounted on a rod of a syringe pressurizing cylinder (3) and a catheter insertion cylinder (4) and a syringe pressurizing cylinder (3) which are installed and operated by pneumatic operation and press the syringe A catheter support 6 mounted on the rod of 4 to move the catheter, and a guide rod extending from the inside of the gun body 2 to the outside while having a guard at the tip thereof to guide the movement of the catheter support 6 ( 7), the solenoid valve (8) and the trigger (8) which is installed inside the gun body (2) and connected to the port side and selectively interrupts the air supplied to the syringe pressurizing cylinder (3) and the catheter insertion cylinder (4) 1) brush receiving the operation signal A controller 9 for controlling the operation of the solenoid valve 9.

The pneumatic drug injection gun according to Patent Document 1 configured as described above has an advantage of being able to be used semi-permanently without being heated even when used for a long time as it is operated by an operating mechanism using pneumatic pressure.

However, the pneumatic drug injection gun according to Patent Document 1 has a problem of creating a patient's rejection or fear of the needle as the needle of the syringe is formed to protrude outward.

The pneumatic drug injection gun according to Patent Literature 1 generates a constant pressure in a regulator for driving a syringe pressurizing cylinder 3 generating a pressure to inject a drug to control a drug injection amount, and a pressure generated for injection amount control. The operating time of the controller is controlled by the electronic control unit (ECU).

This method has the advantage of being relatively simple to implement, but since the resistance pressure of the skin varies depending on the treatment site during drug injection, when a small amount of drug is injected, the amount of injection becomes inaccurate as the syringe receives the internal pressure of the skin, Furthermore, there was a problem that the drug is not injected into the skin.

Republic of Korea Patent No. 10-0597814 (Registered June 30, 2006)

The present invention is to solve the problems as described above, an object of the present invention is to provide a drug injection device is formed in a rod-shaped structure to minimize the fear and rejection of the drug injection device.

And another object of the present invention to provide a drug injection device that can finely adjust the injection amount and the injection speed of the drug.

According to a feature of the present invention for achieving the object as described above, the present invention is a case formed in the shape of a rod, a syringe support provided on the upper portion of the case is mounted with a syringe, provided in the case of the syringe A needle insertion cylinder for generating pressure for inserting a needle into the skin, a drug injection cylinder provided inside the case to generate pressure for injecting a drug stored in the syringe into the skin, and a stretching operation of the drug injection cylinder And a motion transfer part that transmits a force to a rear end of the syringe to inject a drug, wherein the motion transfer part is a stick that transmits pressure to the rear end of the syringe, and is fixed inside the case to support the stick to linearly reciprocate. First and second pedestal, insert hole in the center to insert the stick And a friction plate for providing a stationary friction force so that the stick moves linearly, and a displacement control unit for controlling a displacement of the friction plate by the stretching operation of the drug injection cylinder.

The displacement control unit is provided with a screw thread formed on the outer circumferential surface to be screwed into the through hole formed in the first base, an adjustment screw coupled to one side of the screw portion to move the screw portion and the other side of the screw portion to collide with the friction plate Characterized in that the impact preventing member for absorbing shock and noise during the time.

The movement transmission unit is formed with an insertion hole in which the stick is inserted in the center, characterized in that it further comprises a stopper, one end is fixed to the second support to provide a static friction force to the stick.

A spring is provided between the first support and the friction plate and between the second support and the stopper to provide restoring force to the friction plate and the stopper, respectively.

As described above, the present invention can minimize the rejection and fear of the conventional drug injection device is formed in the case of a rod-shaped, the gun type equipped with a needle.

And the present invention can finely control the injection amount and the injection speed of the drug injected into the skin by one cycle of the stretching operation of the drug injection cylinder by adjusting the displacement that the friction plate can move by using the adjustment screw of the displacement control unit.

1 is a front view showing the internal structure of a conventional pneumatic drug injection gun.
2 is a cross-sectional view of a drug injection device according to a preferred embodiment of the present invention.
3 and 4 is an operating state of the drug injection device shown in FIG.

Hereinafter, a drug injection device according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

2 is a cross-sectional view of the drug injection device according to a preferred embodiment of the present invention, Figure 3 and Figure 4 is an operating state diagram of the drug injection device shown in FIG.

As shown in FIG. 2, the drug injection device according to the preferred embodiment of the present invention includes a case 10 formed in a rod shape, and a syringe support 12 provided with an upper portion of the case 10 to which the syringe 11 is mounted. ), A compressor (13) for compressing air to generate a constant pneumatic, a pair of solenoid valves (14) for opening and closing to selectively deliver the pneumatic pressure generated by the compressor (13), the inside of the case (10) The movement delivery unit 20 which transmits the force by the stretching operation of the needle insertion cylinder 15, the drug injection cylinder 16, and the drug injection cylinder 16 provided at the rear end of the syringe 11 to inject the drug. ).

Unlike the conventional gun type drug injector, the case 10 is formed in a long rod or bar shape.

Accordingly, the present invention can reduce the patient's rejection and fear of the injector formed in the gun type.

The syringe support 12 is provided at the top of the case 10, and when the syringe 11 is mounted, the syringe support 12 is fixed so as not to flow.

At this time, the needle of the syringe 11 is fixedly supported on a separate bracket and is connected to the case of the syringe 11 by a tube or the like so as to receive the drug.

The compressor 13 compresses air to generate a pneumatic pressure of a certain size, for example, about 7 kgf / cm 3, and the pair of solenoid valves 14 are each controlled by an electronic control unit (not shown). The pneumatic pressure generated from the compressor 13 is selectively opened and closed to supply the needle insertion cylinder 15 and the drug injection cylinder 16.

The needle insertion cylinder 15 expands and contracts to insert the needle of the syringe 11 into the skin, and the drug injection cylinder 16 expands and contracts to inject the drug contained in the syringe 11 into the skin through the needle. .

The drug injection cylinder 16 has a cylinder rod 161 which linearly reciprocates by the stretching operation.

Next, the structure of the exercise transmission part 20 is demonstrated in detail with reference to FIG.

As shown in FIG. 3, the movement transmission unit 20 includes a stick 21 for moving the syringe support 12, first and second fixed to a case spaced by a predetermined interval, and installed through the stick 21. The friction plate 24 and the friction plate 24 in which the stick is inserted into the insertion hole 241 which is provided between the second support 22 and 23 and the first and second support 22 and 23 and are formed through the center are drug. The stick 21 penetrates the outer side of the displacement adjusting part 25 and the second support 23 to adjust the displacement moved by the expansion and contraction of the injection cylinder 16, and the upper end of the second support 23. It includes a stopper 26 is installed to be caught by the locking portion 231 of the.

The stick 21 penetrates through the centers of the first pedestal 22 and the second pedestal 23 fixed to the case 10.

The first support 22 is fixed to the through hole 221 and the case 10 formed to penetrate through the screw portion 251 of the displacement control portion 25 to be inserted into the lower portion to support one side of the screw portion 251. A support 222 is provided.

A thread is formed on the inner circumferential surface of the through hole 221 so that the screw portion 251 is screwed to the through hole 221.

The second pedestal 23 has a locking portion 231 formed to be bent downward so that the upper end of the stopper 26 is caught on the rear side.

The friction plate 24 has an insertion hole 241 and a friction plate 24 formed to penetrate so that the stick 21 is inserted in the center thereof, and the insertion hole 241 is slightly larger than the diameter of the stick 21.

A first spring 27 is provided between the friction plate 24 and the first support 22 to provide a restoring force to the friction plate 24.

The displacement adjusting part 25 is a screw part 251 which is screwed into the through hole 221 of the first base 22, an adjusting screw 252 that is coupled to one side of the screw part 251 to rotate the screw part 251, and It is provided on the other side of the screw portion 251 is provided with an impact preventing member 253 that absorbs the impact and noise when colliding with the friction plate 24.

The thread 251 is formed with a screw thread on the outer circumferential surface thereof, and is inserted into the through hole 221 of the first base 22 to be screwed together.

One side of the threaded portion 251 is coupled to the adjustment screw 252 for rotating the threaded portion 251, the adjustment screw 252 is formed integrally with one end of the threaded portion 251, or as shown in Figure 3 10 is fixed at a predetermined position by the support 222 fixed inside.

The impact preventing member 253 is preferably formed of rubber or synthetic resin material in order to increase the absorption rate of impact and noise during the collision with the friction plate 24.

The present invention can adjust the injection amount of the drug by using the displacement control unit configured as described above.

That is, when the adjusting screw 252 is rotated in either direction, the screw portion 251 is moved toward the friction plate 24 and the displacement of the friction plate 24 is reduced, thereby injecting by the stretching operation of the drug injection cylinder 16. The amount of drug injected is reduced.

On the other hand, when the adjusting screw 252 is rotated in the opposite direction, the screw portion 251 moves in a direction away from the friction plate 24, and the displacement of the friction plate 24 increases, thereby expanding and contracting the drug injection cylinder 16. The amount of drug injected is increased.

Accordingly, the present invention can finely control the injection amount and the injection speed of the drug injected into the skin by one cycle of the stretching operation of the drug injection cylinder.

The stopper 26 has an insertion hole 261 formed therethrough so as to be inserted into the stick 21 in the center thereof, and the insertion hole 261 is formed slightly larger than the diameter of the stick 21.

A second spring 28 is provided between the lower portion of the stopper 26 and the second support 23 to provide restoring force to the stopper 26.

Accordingly, the stopper 26 is installed at an oblique angle toward the rear side downward by the second spring 261, and the lower part of the stopper 26 so that the stick 21 can move forward during the forward movement of the stick 21. Rotates so as to be perpendicular to the stick 21 around the top.

Subsequently, when the stick 21 is retracted as the friction plate 24 is rotated to be perpendicular to the stick 21 by the restoring force of the first spring 27, the stopper 26 is inclined obliquely toward the rear downward. Rotational movement to prevent the stick 21 is prevented from being pushed backward by the static friction force generated between the stick 21.

Next, the operation of the drug injection device according to an embodiment of the present invention will be described in detail with reference to FIGS.

First, as shown in FIG. 3, the displacement of the friction plate 24 is adjusted to finely adjust the injection amount and injection speed of the drug.

In detail, in the case of injecting a large number of drugs at high speed, such as the abdomen, the direction in which the screw 251 is moved away from the friction plate 24 by rotating the adjusting screw 252 in one direction to increase the amount of drug injection. Move to.

Then, the displacement that the friction plate 24 can move during the stretching operation of the drug injection cylinder 16 is increased to increase the injection amount and injection speed of the drug.

On the other hand, when it is necessary to reduce the injection amount and the injection speed of the drug injected at once, such as the face, the adjustment screw 252 is rotated in the opposite direction to move the screw portion 251 closer to the friction plate 24.

Then, the displacement that the friction plate 24 can move during the stretching operation of the drug injection cylinder 16 is reduced to reduce the injection amount and the injection speed of the drug.

As described above, the present invention can finely control the injection amount and the injection speed of the drug injected into the skin by one cycle of the stretching operation of the drug injection cylinder by adjusting the displacement of the friction plate using the adjustment screw of the displacement adjusting unit.

In particular, the present invention can remove the regulator to adjust the pneumatic pressure generated from the compressor in the conventional drug injector to the required pressure in each cylinder by adjusting the injection amount and the injection speed of the drug by using the adjustment screw of the displacement control unit.

When power is supplied by turning on a power switch, not shown, the electronic control unit controls the compressor 13 to generate a constant air pressure based on a pre-programmed operating method, and the pair of solenoid valves 14 The opening and closing operations are performed to selectively supply the pneumatic pressure generated in the compressor 13 to the needle insertion cylinder 15 and the drug injection cylinder 16, respectively, under the control of the electronic control unit.

Accordingly, the drug injection cylinder 16 is stretched by the pneumatic pressure supplied from the compressor 13 during the opening and closing operation of the solenoid valve 14, the force is transmitted by the cylinder rod 161 of the drug injection cylinder 16 The friction plate 24 received is rotated slightly and then linearly reciprocated.

Hereinafter, the stretching operation and the contracting operation of the drug injection cylinder 16 will be described separately.

When the drug injection cylinder 16 extends, the friction plate 24 rotates clockwise about the insertion hole 241 so as to be inclined obliquely toward the front side downward as shown in FIG. Move forward with).

At this time, the stick 21 is moved forward by the static friction force generated when the insertion hole 241 formed slightly larger than the diameter of the stick 21 and the stick 21 is in contact, the first spring 27 is the friction plate 24 Elastically deformed to be contracted by a force applied from the bottom of the

On the other hand, the stopper 26 installed obliquely inclined downward toward the rear side of the stick 21 slightly rotates clockwise so that the stick 21 is perpendicular to the stick 21 while moving the stick 21 forward. At this time, the second spring 28 is elastically deformed so as to be contracted by a force applied from the lower portion of the stopper 26.

Then, while the static friction force generated between the stick 21 and the insertion hole 261 is reduced, the stick 21 moves forward freely.

As a result, as the stick 21 moves forward, the force stored at the rear end of the syringe 11 is injected into the skin through the needle through the needle.

Next, when the drug injection cylinder 16 is contracted, the friction plate 24 moves backward while rotating counterclockwise by the restoring force of the elastically deformed first spring 27.

On the other hand, the stopper 26 is rotated in the counterclockwise direction by the restoring force of the second spring 28 to be inclined obliquely downward toward the rear side of the stick 21, the insertion hole 261 of the stopper 26 ) And a static friction force is generated between the stick 21.

Accordingly, the stick 21 is prevented from moving backward by the static friction force generated between the stick 21 and the stopper 26 to maintain the current position.

The drug inside the syringe 11 is injected into the skin by one cycle of the stretching operation of the drug injecting cylinder 16, in which the friction plate 24 and the operating lever 25 return to their original positions, and the stick 21 is fixed to the forward moved position.

On the other hand, if the stick 21 is moved to a position capable of moving forward the syringe 11 to the maximum, it is necessary to replace the syringe 11 because no more drugs can be injected.

In this embodiment, in order to replace the syringe 11, the lower part of the stopper 26 is pressed in the direction of the syringe to be positioned perpendicular to the stick 21 to reduce the static friction force between the stick 21 and the stopper 26.

Then, the stick 21 is pulled backwards to separate the syringe 11 from the syringe support 12, and then a new syringe 11 is mounted on the syringe support 12.

Through the process as described above, the present invention forms the case in the shape of a rod, and finely control the injection amount and the injection speed of the drug injected into the skin by adjusting the displacement that the friction plate can move using the adjustment screw of the displacement control unit Can be.

The scope of the present invention is not limited to the embodiments described above, but is defined by the claims, and various changes and modifications can be made by those skilled in the art within the scope of the claims. It is self evident.

10: Case 11: Syringe
12: Syringe Support 13: Compressor
14: solenoid valve 15: needle insertion cylinder
16: drug injection cylinder 161: cylinder rod
20: exercise delivery unit 21: stick
22,23: 1st, 2nd stand 221: Through hole
222: support portion 231: locking portion
24: friction plate 241: insertion hole
25: displacement control unit 251: screw unit
252: adjusting screw 253: impact preventing member
26: stopper 261: insertion hole
27: first spring 28: second spring

Claims (4)

A case formed into a rod shape,
A syringe support provided on an upper portion of the case, to which a syringe is mounted;
A needle insertion cylinder provided inside the case to generate pressure for inserting the needle of the syringe into the skin;
A drug injection cylinder provided inside the case to generate pressure for injecting a drug stored in the syringe into the skin;
It includes a motion transfer unit for transmitting the force by the stretching operation of the drug injection cylinder to the rear end of the syringe to inject the drug,
The exercise transmission unit
A stick for delivering pressure to the back of the syringe,
First and second pedestals fixed within the case to support the stick to linearly reciprocate;
Insertion hole is formed in the center so that the stick is inserted, the friction plate for providing a static friction force to move the stick linearly and
It includes a displacement control unit for adjusting the displacement of the friction plate is moved by the stretching operation of the drug injection cylinder,
The displacement control unit
A screw thread having a screw thread formed on an outer circumferential surface thereof so as to screw into a through hole formed in the first support;
An adjusting screw coupled to one side of the screw part to move the screw part;
Drug injection device, characterized in that provided on the other side of the screw portion provided with an impact preventing member that absorbs the impact and noise during the collision with the friction plate. delete According to claim 1, wherein the exercise transmission unit
Insertion hole is formed in the center is inserted into the stick, the drug injection device characterized in that it further comprises a stopper is fixed to the second support to provide a static friction force to the stick. The method of claim 3, wherein
Drug injection device, characterized in that the spring is provided between the first support and the friction plate and between the second support and the stopper to provide a restoring force to the friction plate and the stopper, respectively.

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