WO2016125953A1

WO2016125953A1 - Portable automatic drug injector

Info

Publication number: WO2016125953A1
Application number: PCT/KR2015/004939
Authority: WO
Inventors: 이만규; 안상일; 곽호중
Original assignee: (주)엠큐어
Priority date: 2015-02-06
Filing date: 2015-05-18
Publication date: 2016-08-11
Also published as: CN106178195A; CN106178195B; KR101525854B1

Abstract

The present invention relates to a portable automatic drug injector having convenient portability and handling and enabling an accurate amount of a drug to be safely injected. The present invention provides a portable automatic drug injector capable of: easily performing an injection treatment so as to inject a drug without a separate switch operation, by implementing a novel automatic drug injection method enabling the drug to be automatically injected into the skin by using a guide acting as a switch touching and pushing the skin when the drug is injected, particularly, ensuring the accuracy and safety of a treatment by accurately adjusting an injection amount of the drug; providing a customized treatment according to the conditions of various patients, convenient portability, easy handling and easy and accurate treatment regardless of a user's proficiency by having various types of manipulation means, which enable an injection amount of the drug and an injection depth to be adjusted, and a rechargeable battery embedded therein.

Description

Portable automatic injector

The present invention relates to a portable automatic injector, and more particularly, to a portable automatic injector that is easy to carry and handle and can safely inject an accurate amount of drug.

In general, the method of administering the drug through the skin is a method of administering the drug systemically or locally without passing through the digestive tract, which may reduce the side effects of the gastrointestinal tract. have.

In addition, since the discharge and absorption rate of the drug can be controlled constantly, there is an advantage that the patient himself can safely administer the drug without the help of a specialist.

Injecting a drug is usually a form in which a doctor prescribes a drug to be injected into a patient, and a nurse injects the drug into a patient's dice by holding a syringe containing the drug.

For example, a syringe is mainly used as a means for injecting a drug into the human body for therapeutic purposes. When injecting a drug into the skin using the syringe, the plunger is pushed while holding the syringe body and the plunger with one hand. It is common to inject drugs.

In the case of injecting the drug with a syringe in this way, the overdose of the drug may cause an emergency situation for the patient, and the nurse or the user should pay close attention.

However, there are a lot of difficulties in safe injection treatment, such as requiring a great deal of skill and experience to accurately adjust while adjusting the injection amount of the drug in the syringe injection.

On the other hand, patients who receive injections only when a particular disease does not occur without the usual injections, because the need for rapid injection of the drug, the individual always carry the drug and the self or guardians inject the drug through the syringe.

Even in this case, a considerable amount of skill is required for the quantitative injection of the drug, such as difficulty in controlling the amount of drug injection or adjusting the depth of the needle.

In other words, since a personal syringe is injected into the body using a single disposable needle, it is not easy to accurately determine the location of the patient's injection of the drug itself, and it is inconvenient to handle, such as difficulty in controlling the speed of injecting the drug. There are many risk factors in terms of safety.

In view of such a situation, Korean Patent Publication No. 10-2010-0129026 discloses "a chemical liquid control device which can be finely adjusted", and Korean Patent Publication No. 10-2013-0115542 discloses a "medical drug injection device". .

However, the conventional drug injector is a way that the product is operated only by pressing the switch button applied to the product, the operation method is very inconvenient, such as stabbing the skin with a needle and injecting the drug by pressing the switch button.

In addition, when the drug is injected by pressing the switch button attached to the product, the procedure itself is not only difficult and difficult, but also inaccurate procedure because of the inconvenience of injection treatment as well as inadequate safety.

Therefore, the present invention has been made in view of the above, by implementing a new type of automatic drug injection system to automatically inject the drug into the skin by using a guide of the switch role pressed against the skin during drug injection, It is an object of the present invention to provide a portable automatic injector that can easily inject a drug for injecting the drug without a separate switch operation, and in particular, to precisely adjust the amount of infusion of the drug and to secure the accuracy and safety of the procedure.

In addition, another object of the present invention is to have a variety of operation means that can adjust the injection amount and injection depth of the drug, as well as having a built-in battery that can be self-charged, it is possible to carry out customized procedures according to the condition of various patients and easy to carry The present invention provides a portable automatic drug injector that is easy to handle and can be easily and accurately treated regardless of the user's skill.

In order to achieve the above object, the portable automatic drug injector provided in the present invention has the following features.

The portable automatic drug injector includes a main body equipped with various buttons including a power button, a syringe installed inside the main body and having a syringe needle at the front, and a rear side of the syringe inside the main body. Actuator which is installed and operated by power and can be moved back and forth by the operation of the actuator, and the plunger pressurizes the drug in the syringe, and is installed at the front end of the main body, can be stored and taken out and pressed against the skin while being switched on It is composed of a structure including a guide for generating a signal, and a controller installed inside the main body and receiving a switch contact signal of the guide to output a control signal for the operation of the actuator.

Accordingly, the portable automatic drug injector is capable of automatically injecting the drug into the skin by using a signal provided from a guide pressed against the skin during drug injection, thereby accurately and safely metering the drug.

Here, the portable drug autoinjector is a means for generating a switch contact signal when the guide is pushed back while being pressed against the skin. The portable drug autoinjector has a switch contact and is electrically connected to the controller side and installed inside the syringe cover and the main body cover. A pair of switch bars for generating a switch contact signal in accordance with the movement of the guide side may be further included.

In addition, the guide is formed in the rear end in order to adjust the depth of the syringe needle sticks to the skin and at the same time withdrawal length can be adjusted by using a multi-stage stepped step of different depths in contact with the positioning projection of the stopper ring.

In addition, the plunger may be coupled to the screw shaft of the actuator to apply a method of pressurizing the drug in the syringe while moving forward and backward through the screw transmission.

In addition, the portable automatic drug injector is a means for supplying power for the operation of the actuator, it may include a battery installed inside the main body and a DC jack for charging the battery.

Portable automatic drug injector provided in the present invention has the following advantages.

First, the drug is automatically injected into the skin using a switch signal of the guide pressed against the skin without a separate switch operation, there is an advantage that anyone can inject the drug accurately and safely.

Second, since the amount of injection and the depth of injection can be adjusted, there is an advantage that can be customized to fit the condition of various patients.

Third, there is an advantage that can be conveniently used regardless of the place to be portable and easy to handle as a rechargeable.

1 to 5 are perspective views showing a portable automatic drug injector according to an embodiment of the present invention

Figure 6 is a perspective view showing the coupling state of the guide in a portable automatic drug injector according to an embodiment of the present invention

Figure 7 is a front view showing the installation structure of the switch bar in a portable automatic drug injector according to an embodiment of the present invention

8 is a schematic diagram showing a method for assembling a portable automatic drug injector according to an embodiment of the present invention.

Figure 9 is a schematic diagram showing a controller of a portable automatic injector according to an embodiment of the present invention

Figure 10 is a schematic diagram showing the state of use of the portable automatic drug injector according to an embodiment of the present invention

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 to 5 is a perspective view showing a portable automatic drug injector according to an embodiment of the present invention.

As shown in Figs. 1 to 5, the portable automatic drug injector includes a main body 11 as a means for accommodating various components.

The main body 11 has a cylindrical elongated housing shape in which a tip is opened for a user to hold and use conveniently, and can be conveniently carried. The main cover 11a and the syringe cover 11b are formed in combination. You lose.

The main cover 11a is composed of a combination of an upper housing and a lower housing, and the upper and lower housings are coupled by a plurality of clips 28 to be disassembled and assembled.

In addition, the syringe cover 11a is composed of an upper housing and a lower housing which are fastened by a pin 29 and coupled in a structure capable of disassembling and assembling. The syringe cover 11a is coupled to the front end of the main body cover 11a in a removable structure. .

For example, in accordance with the engaging projection (not shown) in the main body cover 11a, the "b" shaped locking groove 31 on the inner circumferential surface of the rear end of the syringe cover 11b is axially pushed in the circumferential direction. When it is tightened by rotating, the syringe cover 11b can be mounted on the main body cover 11a side. On the contrary, the syringe cover 11b can be easily removed from the main body cover 11a by turning in the axial direction after turning the syringe cover 11b.

This detachable operation of the syringe cover 11b is performed when the syringe 13 is replaced.

The main body 11 is equipped with various buttons for operating the power ON / OFF operation, as well as the amount of drug injection.

For example, a power button 10 for operating the device ON / OFF is mounted on the upper housing of the main body cover 11a, and power is applied to the device when the power button 10 is pressed. You will be ready.

In addition, the upper housing of the main body cover 11a is equipped with an injection amount up button 23 and an injection amount down button 24 for adjusting a drug injection amount.

Accordingly, when the injection amount up button 23 is repeatedly pressed, the drug injection amount can be adjusted (set) to increase step by step.

At this time, the drug injection range can be adjusted to increase in three steps, such as 0.01cc, 0.02cc, 0.03cc.

Here, the amount of drug injection can be adjusted to several steps in addition to three steps, of course.

Further, even when the injection amount down button 24 is repeatedly pressed, the drug injection amount can be adjusted to be reduced step by step.

In this case, the drug injection range can be adjusted to be reduced in three steps, such as 0.01cc, 0.02cc, 0.03cc.

In addition, the upper housing of the main body cover 11a is equipped with a forward button 25 and a reverse button 26 for manually moving the plunger 15 forward or backward.

In this case, when the forward button 25 is pressed, the plunger 15 may be advanced, and when the backward button 26 is pressed, the plunger 15 may be reversed.

The advance button 25 is used to advance the plunger 15 before the drug is injected into the skin to fill the empty space of the syringe needle 12 with the drug, and the reverse button 26 exhausts all the drugs in the syringe 13. It is used to return the plunger 15 from the state.

That is, after the syringe is used up, the plunger 15 can be returned using the reverse button 26 for the next procedure.

In addition, a display window 27 is mounted on the upper housing of the main body cover 11a, and at this time, the display window 27 has a drug set injection amount (to a value such as 0.01 cc), a battery remaining amount (such as the number of lights on the rod) ) Can be displayed.

The injection amount up / down

buttons

23 and 24, the forward and

backward buttons

25 and 26, the display window 27, and the like constitute an electrical circuit with the controller 17 side of the main body 11. Accordingly, when the operation signal of each button is input, the operation (rotation amount, rotation direction, etc.) of the actuator 14 can be controlled by the output control of the controller 17.

On the other hand, one side of the main body 11, for example, one side of the syringe cover (11b) in which the syringe 13 contained in the main body is located, side by side along the longitudinal direction of the housing is formed with a drug confirmation slit 30, At this time, by checking the amount of the drug remaining in the syringe 13 through the drug check slit 30, it is possible to replace the syringe 13 at an appropriate time.

The portable autoinjector also includes a battery 21 as a means for supplying power to the device.

The battery 21 is a means for supplying power for the operation of the actuator 14 and the like, and is installed inside the main body 11, for example, behind the actuator 14 described later, and on the controller 17 side. And it is electrically connected to the actuator 14 side, it is possible to supply power to the actuator 14 and the like.

In order to charge the battery 21, the rear end of the main body 11 is provided with a DC jack 22 electrically connected to the battery 21 side and the controller 17 side.

Accordingly, by connecting a charging adapter (not shown) to the DC jack 22, it is possible to charge the battery 21 from an external power source, it is possible to use during charging.

In addition, the portable automatic injector includes a syringe 13 filled with a certain amount of drug.

The syringe 13 is installed in the main body 11, that is, parallel to the cover inside the syringe cover 11b, and the syringe needle 12 is mounted to the front of the syringe 13.

Here, the syringe needle 12 may be made of a multi-injection needle type having a plurality of needles.

In addition, a part of the plunger 15 serving as a syringe rod is inserted into the opened rear end of the syringe 13 to close the drug in the syringe 13.

Accordingly, when the plunger 15 moves forward during the operation of the actuator, the drug in the syringe 13 is pressurized by the plunger 15 to be ejected through the syringe needle 12 and injected into the skin.

The portable autoinjector also includes an actuator 14 and a plunger 15 as a means to power the device and pressurize the drug during drug injection.

The actuator 14 is located behind the syringe 13 in the body 11 and is installed in a structure fixed in the actuator housing 32.

Here, the actuator 14 is able to apply a servo motor capable of forward and reverse rotation control.

The actuator 14 is connected to the controller 17 side and the battery 21 side in an electrical circuit configuration, and the amount of rotation, rotation speed, direction of rotation, etc. can be controlled by the controller 17.

The screw shaft 20 is connected to the shaft of the actuator 14 via the coupler 33, and the screw shaft 20 is disposed side by side along the central axis of the plunger 15. Screwed to the side.

Accordingly, when the actuator 14 is operated, the plunger 15 which is screwed thereto by the rotation of the screw shaft 20 may be linearly moved back and forth through screw transmission.

The plunger 15 is a means for pressing the drug and is located in front of the actuator 14 in the body 11 and coupled with the screw shaft 20.

Such a plunger 15 is inserted into the rear end of the syringe 13 through the front end portion to be able to act as a syringe pusher.

That is, the plunger 15 can press the drug contained in the syringe 13 while moving forward through the power of the actuator 14 and the screw transmission of the screw shaft 20.

Of course, although not shown, a means for guiding the plunger 15 from rotating itself when the plunger 15 moves forward and backward may be provided in the main body.

The portable autoinjector also includes a guide 16 as a means for providing an operation start signal of the device for drug injection.

The guide 16 is the part which first touches the skin prior to the syringe needle 12 during the injection of the drug. The guide 16 is formed in a circular tube shape and is stored and drawn out inside the tip of the main body 11, that is, the tip of the syringe cover 11b. It is installed in a possible structure.

Here, the guide 16, as shown in Figure 6, in the state fitted to the tip of the syringe cover (11b) through the wedge-shaped locking projection 40 formed on the end of the elastic bar portion of the tip of the syringe Since the front end of the cover 11b is caught by the inner wall jaw portion (not shown), the detachment from the syringe cover 11b side can be prevented.

The syringe needle 12 of the syringe 13 can be positioned inside the guide 16 installed in this way.

The stopper ring 18 is arranged concentrically inside the rear syringe cover 11b of the guide 16, and the stopper ring 18 is in contact with the rear end of the guide 16 while the guide 16 The storage and withdrawal of the operation will be able to move back and forth together.

Here, the stopper ring 18 is inserted into the guide groove 42 formed along the longitudinal direction of the inner wall of the syringe cover 11b through the lateral protrusion of the positioning protrusion 38 to be described later to receive the guide ( With 16) you can move back and forth.

As a result, the movable guide 16 and the stopper ring 18 stop together with contact and contact formation between the switch bars 43a and 43b to be described later, and the reverse limit position of the guide 16 can be determined. When 16) is at the reverse limit position, the switch contact signal is generated and the drug can be injected therefrom.

In this way, the syringe needle 12 is stuck to the skin by the movement of the guide 16 and the stopper ring 18, i.e., allowing the drug to be injected only when the guide 16 is in the retraction limit position. It is possible to prevent the drug from being injected in the absence.

In addition, a restoring spring 35 is provided as a means for restoring the guide 16, that is, a means for automatically withdrawing after storage, and the restoring spring 35 at this time has a rear portion and a syringe cover of the stopper ring 18. It is installed in a structure that is supported at both ends between the stopper end 34 formed along the inner wall circumference of the (11b) serves to elastically support the entire guide 16 including the stopper ring 18 to the outside at all times.

In addition, a pair of

switch bars

43a and 43b having a switch contact 36 are provided as a means for generating a switch contact signal at a retraction limit position when the guide 16 is pressed against the skin and pushed back.

The switch bars 43a and 43b are installed in a structure in which the syringe bars 11b and the body cover 11a are arranged in a straight line back and forth in parallel along the cover length direction, and the switch bars 43a disposed forward are It is possible to move back and forth while contacting the stopper ring 18 through the front end, and the switch bar 43b disposed at the rear side can be fixed while being connected to the controller 17 side through the rear end thereof.

In addition, the rear end and the front end of the switch bars 43a and 43b facing each other are made of a switch contact 36, and maintain a constant gap with each other, and then move according to the movement of the front switch bar 43a. As they stick together, they can generate switch contact signals.

Of course, the switch contacts 36 and the controller 17 of the switch bars 43a and 43b at this time may be electrically connected.

Accordingly, when the guide 16 and the stopper ring 18 come into contact with the switch contact 36 at the reverse limit position, the switch contact 36 is ON and the switch contact signal at this time is provided to the controller 17 side. At the same time, drug injection can be achieved through actuator operation.

As another example, as a means for generating a signal by detecting the reverse limit position of the guide, in addition to a method for generating a switch contact signal by physical contact, a method for generating a signal by detecting a guide position using a sensor means is applied. You can do it.

In addition, the guide 16 is able to adjust the withdrawal length (depth of storage), thereby enabling the depth of the syringe needle 12 stuck to the skin.

To this end, the rear end of the guide 16 is a multi-stage stepped portion of a structure in which a plurality of groove portions having different depths are arranged in succession, for example, a structure in which a groove portion having a relatively deeper depth is sequentially arranged in a circumferential direction. (19) is formed.

The multi-stage stepped portion 19 may be provided with about three pairs arranged at intervals of 120 °.

In addition, a positioning projection 38 is inserted into the front surface of the stopper ring 18 to be selectively inserted into the multi-stage stepped portion 19 of the guide 16. At this time, the positioning projection 38 is also 120. It may be provided with about three arranged at intervals.

Accordingly, any one of the grooves of the multi-stage stepped portion 19, for example, 0.9 mm, 1.2 mm, 1.5 mm, and 2.0 mm, is formed by turning the guide 16. By fitting the grooves to the positioning projections 38 in the stopper ring 18, the guide withdrawal length, i.e. the drug injection depth, can be adjusted.

In addition, the indicator 37 is provided as a means for confirming the depth adjustment state of the guide 16.

The indicator 37 is in the form of a ring, and is mounted on the outer periphery of the distal end of the syringe cover 11b, and its circumferential surface has a numerical scale of 0.9 mm, 1.2 mm, 1.5 mm, and 2.0 mm indicating the depth of the multi-stepped step 19. Is indicated.

Accordingly, when the display line of the guide 16 is aligned with the numerical scale of the indicator 37, the current guide extraction length, that is, the drug injection depth of the current device can be known.

The portable autoinjector also includes a controller 17 as a means for controlling device components.

The controller 17 is in the form of a PCB substrate, is installed inside the main body 11, and receives a switch contact signal of the guide 16 to output a control signal for operating the actuator 14, various buttons. It is possible to perform the function of controlling the output of the actuator 14 by receiving a kind of operation signal, displaying the control result on the display window 27, and the like.

As an example, when a setting signal obtained by pressing the injection amount up button 23 is input, it is possible to perform a control to increase the rotation amount of the actuator 14.

In addition, it is possible to perform a control for continuously operating the actuator 14 in the forward direction while the forward button 25 is pressed.

8 is a schematic diagram showing a method of assembling a portable automatic drug injector according to an embodiment of the present invention.

As shown in Figure 8, here shows a process of assembling each component of the portable automatic injector in order.

For example, the rear end of the syringe 13 containing the drug is fitted to the front end of the plunger 15 exposed to the front of the main body cover 11a of the main body 11 to engage.

Next, the rear end of the syringe cover 11b is coupled to the front end of the main body cover 11b to be coupled.

At this time, the syringe 13 is accommodated in the syringe cover 11b.

Next, the syringe needle 12, i.e., the multi-syringe needle, is fixed to the distal end of the syringe 13.

At this time, since the coupling method of the syringe 13 and the syringe needle 12 is the same as in the prior art, a detailed description thereof will be omitted.

Next, insert the guide 16 to the tip of the syringe cover (11a) and select the injection depth while rotating the guide 16, the preparation for use is complete.

Figure 9 is a schematic diagram showing a controller of a portable automatic drug injector according to an embodiment of the present invention.

As shown in Fig. 9, the controller 17 is connected to a power button, an injection amount up-

down button

23, 24, forward and

backward buttons

25, 26 as operating means, and the battery 21 and DC as power supply means. The jack 22 is connected.

In addition, an electrical circuit configuration is also made between the controller 17 side and the actuator 14 side.

In addition, a circuit configuration is also made between the switch contact 36 side and the controller 17 side which are turned ON / OFF by the guide 16.

Here, the connector 39 can be installed on the circuit between the switch contact 36 and the controller 17.

At this time, the connector 39 is formed in two contact forms, and may be mounted on the body cover 11a side and the syringe cover 11b side, respectively. The circuit between the side 36 and the controller 17 is broken, and when assembling the syringe cover 11b, the circuit between the switch contact 36 side and the controller 17 can be connected while the contacts are attached.

As an example of the various control logic of the controller 17, it is possible to enter the setting mode when the injection amount up button 23 and the forward button 26 of the mode at the same time, the movement of the actuator to the injection amount of 0.01cc The operating value can be adjusted.

As another example, the power may be automatically cut off when there is no operation signal of the device for 1 minute, and the device may be turned on when any action (button, guide press, etc.) occurs.

Therefore, the process of injecting the drug into the skin using the portable automatic drug injector configured as described above is as follows.

Figure 10 is a schematic diagram showing the use of the portable automatic drug injector according to an embodiment of the present invention.

As shown in FIG. 10, as a preparation procedure before injecting the drug into the skin, the advance button 25 is pressed to fill the syringe needle 12 with the drug.

When the advance button 25 is pressed in this way, the plunger 15 is advanced by the operation of the actuator 14, and thus the drug is ejected through the syringe needle 12 while the drug of the syringe 13 is pressed.

When a small amount of drug emerges from the syringe needle 12, the hand is released from the forward button 25 (①).

In this state, the device 100 is placed on the injection site of the skin (②), and the guide 16 is pressed against the skin and the guide 16 is pressed into the main body (③), and the syringe needle 12 ) Is inserted into the skin (④).

At the same time, the guide 16 enters the main body to turn on the switch contact 36 at the retreat limit position, and then the actuator 14 is controlled by the output control of the controller 17 which receives the ON signal of the switch contact 36. Is activated, and the drug in the syringe 13 is injected into the skin through the syringe needle 12 by the advancement of the plunger 15 (⑤ ~ ⑦).

In this case, since the controller 17 controls the operation (rotation amount, etc.) of the actuator 14 based on the amount of drug injection set by the amount of injection up / down

buttons

23 and 24, a quantity of drug can be injected. .

Here, as a preferable example related to the drug injection, it is possible to inject two times the injection amount by forward rotation of the actuator 14, and then reverse rotation to suck the half again.

Then, when the forward or reverse rotation process of the actuator 14 is completed, it is preferable to stop with a beep (Beep).

Subsequently, when the device 100 is removed from the skin after the drug injection, the guide 16 returns to the initial drawn out state, and all the drug injection procedures are completed (8 to ⑦).

As such, in the present invention, by providing a new injector for injecting the drug into the skin by using a guide pressed against the skin during the drug injection as a switch, injection treatment for drug injection can be easily performed without a separate switch operation In addition, the dose of the drug can be accurately adjusted, and the drug injection procedure can be accurately and safely.

[Revision according to Rule 26 09.06.2015]
delete

Claims

Main body 11;

A syringe (13) installed inside the main body (11) and having a syringe needle (12) at the front to store the drug;

An actuator 14 installed at the rear of the syringe 13 in the body 11 and operated by being supplied with power; A plunger 15 capable of forward and backward operation by the operation of the actuator and pressurizing the drug in the syringe;

A guide (16) installed at the front end of the main body (11) to receive and withdraw and to be pressed against the skin to generate a switch contact signal;

A controller (17) installed inside the main body (11) and receiving a switch contact signal of the guide (16) to output a control signal for pressurizing the plunger (150);

Includes, the portable automatic injector, characterized in that the drug can be automatically injected into the skin by using a signal provided from the guide pressed against the skin during drug injection.
The method according to claim 1,

As a means for generating a switch contact signal when the guide 16 is pressed against the skin and pushed backward, the guide 16 has a switch contact 36 and is electrically connected to the controller 17 side, and the syringe cover 11b and the main body cover. And a pair of switch bars (43a, 43b) installed inside the (11a) to generate a switch contact signal according to the movement of the guide side.
The method according to claim 1,

The guide 16 is formed at the rear end of the guide 16 in order to adjust the depth of the needle needle 12 is stuck to the skin and at a different depth of contact with the positioning projection 38 of the stopper ring 18. Portable automatic drug injector, characterized in that the withdrawal length can be adjusted by using a multi-stage multi-step step (19).
The method according to claim 1,

The plunger (15) is coupled to the screw shaft (20) of the actuator (14) is a portable automatic drug injector, it is possible to press the drug in the syringe while moving forward and backward through the screw transmission.
The method according to claim 4,

Means for supplying power for the operation of the actuator 14, characterized in that it comprises a battery 21 installed inside the main body 11 and a jack 22 for charging the battery 21 Portable Autoinjector.
The method according to claim 2,

The main body (11) is a portable automatic drug injector, characterized in that the injection amount up button 23 and the injection amount down button 24 to adjust the amount of drug injection.
The method according to claim 2,

The main body (11) is a portable automatic drug injector, characterized in that it is equipped with a forward button (25) and a reverse button (26) for manually advancing or retracting the plunger (15).
The method according to claim 2,

The outer surface of the main body 11 is a portable automatic injector, characterized in that the display window 27 for displaying the drug set injection amount and the remaining amount of the battery is mounted.