KR20230064764A - A drug injection device with adjustable injection depth of multiple needles - Google Patents

Abstract

The present invention relates to a drug injection device capable of adjusting the injection depth of a multi-needle, and includes a drug case having upper and lower openings and formed to accommodate a syringe containing a drug therein, and an internal drug case formed on the upper portion of the drug case. A grip case that is empty and formed to be gripped by a user, a metered supply unit formed inside the grip case and the drug case and pressurizing and discharging the drug contained in the syringe by means of a push button, and a lower portion of the drug case It is coupled to the syringe and comprises an injection part formed to adjust the injection depth by controlling the protruding height of the injection needle.

Description

A drug injection device with adjustable injection depth of multiple needles

The present invention relates to a drug injection device capable of adjusting the injection depth of a multi-needle, and more particularly, controls the penetration depth of a needle while enabling a constant dose of drug to be injected when a drug is injected into a large area. It relates to a drug injection device capable of adjusting the injection depth of a multi-needle that can be used.

In general, a drug injection device for injecting a drug into the skin is used for skin beauty such as wrinkle removal, acne removal, dead skin removal, and hair loss treatment, or for parenterally administering a drug for treatment into a patient's body.

The most commonly used method among these drug injection devices is to use a needle-type syringe, which can be referred to as a method of directly administering a drug by piercing the skin with a syringe equipped with an injection needle.

However, in the case of this traditional subcutaneous injection method, patients' discomfort due to pain during injection is pointed out as a major drawback, and there is a concern of wounds due to perforation of the skin layer and secondary infection through it.

In addition, in the case of drugs used for cosmetic purposes rather than prescription drugs, since it is difficult to inject directly with a conventional syringe, a method of applying the drug to the skin surface and absorbing it is preferred.

However, drugs applied to the skin have a low absorption rate, so it is difficult to expect a desired therapeutic effect, and hygienic problems arise due to contamination of dust and foreign substances by wiping clothes or drugs during daily life.

Accordingly, a method of infiltrating and delivering the drug into the skin tissue using a short needle has been developed, but the dose of the injected drug is not constant and the depth of penetration of the needle varies depending on the user's skill level or skin location. There was a problem that caused pain.

Korean Patent Registration No. 10-1939061

An object of the present invention to solve the above problems is to inject a drug that can be injected into the skin with a multi-needle injection depth adjustable so that only a fixed amount is discharged when the drug is pressurized to inject the drug, so that the drug is constantly injected into the skin when the drug is injected in a wide range. to provide the device.

In addition, another object of the present invention is a drug capable of adjusting the injection depth of a multi-needle that can inject a drug by penetrating the needle to a desired depth by adjusting the height at which the needle is exposed according to the shape or location of the skin where the drug is injected. To provide an injection device.

Another object of the present invention is to provide a multi-needle injection depth controllable drug injection device that can be used by replacing a needle and a syringe in which drugs are stored to prevent medical accidents.

In order to solve the above problems, the drug injection device capable of adjusting the injection depth of the multi-needle of the present invention has an upper and lower openings and a drug case formed to accommodate a syringe storing a drug therein, and an upper part of the drug case A grip case formed inside the grip case that is empty and is formed to be gripped by a user, a metered supply unit formed inside the grip case and the drug case and pressurizing the drug contained in the syringe by a push button to discharge the drug in a fixed amount, and the drug It is characterized in that it comprises an injection part coupled to the syringe at the lower part of the case and formed to adjust the injection depth by controlling the protruding height of the injection needle.

In addition, the injection part of the drug injection device capable of adjusting the injection depth of the multi-needle of the present invention is formed such that the injection needle is exposed to the outside or inserted into the inside according to the rotation direction and rotation number, so that the injection depth depends on the length exposed to the outside. It is characterized in that can be adjusted.

In addition, the injection part of the drug injection device capable of adjusting the injection depth of the multi-needle of the present invention has a connection packing in which the tip of the syringe is inserted and fixed at the center and the outer surface is inserted into the drug case to prevent rotation, and the connection packing A housing that is screwed to the front and formed so that the tip of the syringe can be inserted into the rear surface to receive the drug in the front direction, and is inserted into the front of the housing to prevent rotation and is provided with a plurality of injection needles, so that the syringe A needle module for injecting the supplied drug, a protective cap coupled to the front surface of the housing and provided with a plurality of through holes so that the injection needle can protrude to the outside, and a protective cap formed on the outer surface of the housing according to the rotation direction It is characterized in that it consists of an adjustment ring for adjusting the height at which the injection needle protrudes by sliding the protective cap to the front or rear surface of the housing.

In addition, the housing of the drug injection device capable of adjusting the injection depth of the multi-needle of the present invention is formed on the outer circumferential surface and has a plurality of guide grooves formed on the outer circumferential surface to prevent the protective cap from rotating and guide it to slide by the control ring. It is characterized in that it further comprises a connection groove for restraining the adjustment ring to rotate in place, and a fixing rail formed on an inner circumferential surface and preventing the needle module inserted therein from rotating.

In addition, the control ring of the drug injection device capable of adjusting the injection depth of the multi-needle of the present invention is formed so that a pair of semicircular bodies can be coupled or separated from each other, and the rear surface is constrained to the outer surface of the housing to rotate in place. It is characterized in that it further comprises a departure prevention end protruding inward so as to be.

In addition, the quantitative supply unit of the drug injection device capable of adjusting the injection depth of the multi-needle of the present invention is characterized in that when the push button is pressed, the piston inside the syringe is moved only once by a set amount to discharge the drug by the moved volume. to be

As described above, according to the drug injection device capable of adjusting the injection depth of the multi-needle according to the present invention, only a fixed amount is discharged when the drug is pressed to inject the drug, so that the drug is injected into the skin consistently when the drug is injected in a wide range. It works.

In addition, according to the drug injection device capable of adjusting the injection depth of the multi-needle according to the present invention, the height at which the needle is exposed can be adjusted according to the shape or location of the skin to inject the drug, so that the needle penetrates to the depth desired by the user to inject the drug. There are effects that can be done.

In addition, according to the drug injection device capable of adjusting the injection depth of the multi-needle according to the present invention, there is an effect that the needle and the syringe in which the drug is stored can be replaced to prevent medical accidents.

1 is a perspective view showing the external appearance of a drug injection device capable of adjusting the injection depth of a multi-needle according to the present invention.
Figure 2 is a cross-sectional view showing the internal structure of the drug injection device capable of adjusting the injection depth of the multi-needle according to the present invention.
Figure 3 is an assembly view showing an exploded view of the injection unit of the multi-needle injection depth controllable drug injection device according to the present invention.
Figure 4 is an enlarged cross-sectional view of the injection unit of the drug injection device capable of adjusting the injection depth of the multi-needle according to the present invention.
5 is a cross-sectional view showing a needle protruding to adjust the injection depth of the drug injection device capable of adjusting the injection depth of the multi-needle according to the present invention.

Specific features and advantages of the present invention will be described in detail below with reference to the accompanying drawings. Prior to this, if it is determined that the detailed description of functions and configurations related to the present invention may unnecessarily obscure the gist of the present invention, the detailed description will be omitted.

The present invention relates to a drug injection device capable of adjusting the injection depth of a multi-needle, and more particularly, controls the penetration depth of a needle while enabling a constant dose of drug to be injected when a drug is injected into a large area. It relates to a drug injection device capable of adjusting the injection depth of a multi-needle that can be used.

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

1 is a perspective view showing the external appearance of a drug injection device capable of adjusting the injection depth of a multi-needle according to the present invention, and FIG. 2 is a cross-sectional view showing the internal structure of the drug injection device capable of adjusting the injection depth of a multi-needle according to the present invention. .

As shown in FIGS. 1 and 2, the drug injection device capable of adjusting the injection depth of the multi-needle according to the present invention has an upper and lower opening and is formed to accommodate the syringe 220 storing the drug therein. The case 200, the grip case 100 formed on the top of the drug case 200 and the inside is empty and formed to be gripped by the user, and formed inside the grip case 100 and the drug case 200, A fixed-quantity supply unit 300 that pressurizes the drug accommodated in the syringe 220 by the push button 310 and discharges it in a fixed amount, and is combined with the syringe 220 at the bottom of the drug case 200 and protrudes height of the injection needle 431 It is characterized in that it comprises an injection unit 400 formed to adjust the injection depth by controlling.

The inside of the drug case 200 and the grip case 100 are hollow and the upper and lower portions are open, respectively, and the upper portion of the drug case 200 and the lower portion of the grip case 100 are formed to be coupled or separated from each other. has been

The drug case 200 is formed so that the syringe 220 containing the drug can be inserted and accommodated from the top to the bottom, and a piston 221 capable of pressurizing the drug is provided inside the syringe 220.

The tip of the syringe 220 can be exposed to the outside through the opened lower part of the drug case 200, and the drug discharged by combining with the injection unit 400 can be injected into the skin through the injection unit 400. do.

In addition, a support ring 210 preventing the syringe 220 from descending is formed on the upper inner surface of the drug case 200, and the syringe 220 can be fixed at a set position through the support ring.

The grip case 100 is coupled with the fixed quantity supply part 300 at the set position, and the push button 310 of the quantity supply part 300 is exposed to the outside at the top of the grip case 100. Through the push button 310, the metered supply unit 300 can supply the drug as much as the set amount.

At this time, the outer surface of the grip case 100 is preferably formed with a non-slip rubber material on the surface so that the grip case 100 does not slip when the user presses the push button 310 while holding it by hand.

The quantitative supply unit 300 is characterized in that when the push button 310 is pressed, the piston 221 inside the syringe 220 is moved only once by a set amount to discharge the drug by the moved volume.

In addition, the quantitative supply unit 300 protrudes from the open top of the grip case 100 and is formed on the lower part of the push button 310 and the push button 310 formed to be moved up and down by external force, and both sides have force A plurality of blades for delivering is formed, and the lower end is coupled with the piston 221 of the syringe 220, and the push bar 330 transported by a set amount according to the operation of the push button 310, and the push button 310 It is formed spaced apart from the bottom and is formed spaced apart from the lower part of the pressing module 340, which presses both sides of the push bar 330 and lowers it while moving up and down by the push button 310, and the pressing module 340. A fixing module 360 coupled to both sides of the push bar 330 to prevent the lowered push bar 330 from moving upward, and a fixing module 360 formed at the bottom of the fixing module 360 and allowing the fixing module 360 to escape. It consists of a fixing ring 370 to prevent it from happening.

Here, between the push button 310 and the pressure module 340, a return spring 320 for returning the push button 310 to its original position by an elastic force when the external force is removed after the push button 310 is lowered, and a pressure module ( 340) and the fixing module 360, it further includes a pressure spring 350 that returns the pressure module 340 to its original position by an elastic force when the external force is removed after the pressure module 340 is lowered.

The lower end of the push bar 330 is inserted into the inside of the syringe 220, and the lower end is inserted into the center of the piston 221 of the syringe 220 and coupled to the inside of the syringe 220 as the push bar 330 descends. drug can be released.

When the user presses the push button 310 to inject the drug, the push button 310 descends into the grip case 100 and moves the press module 340 downward, formed on the press module 340. The pressing end 341 presses the push bar 330 downward while being coupled to the horizontal surface of the blade formed on the side of the push bar 330.

At this time, when the push bar 330 is lowered, the fixing end 361 formed on the fixing module 360 moves along the inclined surface formed on the blade of the push bar 330, spreads to the side, and then reaches the horizontal surface. If the push bar 330 does not descend after 361 reaches the horizontal surface, the position of the push bar 330 can be fixed in a lowered state by the fixing end 361.

In addition, when the external force applied to the push button 310 disappears, the push button 310 is moved upward by the return spring 320, and the press module 340 that presses the push bar 330 is also moved to the press spring 350. is moved to the top by

At this time, the pressing end 341 formed on the pressing module 340 moves along the inclined surface of the blade formed on both sides of the push bar 330 when the pressing module 340 moves upward, and the pressing module 340 moves When this is completed, it is located on the horizontal plane of the blade formed on the push bar 330.

That is, the pressing end 341 formed on the pressing module 340 is positioned on a horizontal surface and used for lowering the push bar 330 when descending, and the fixing end 361 formed on the fixing module 360 is positioned on a horizontal surface. This serves to prevent the push bar 330 from rising.

At this time, it is preferable that the pressing end 341 and the fixing end 361 are formed on both sides of the inside of the pressing module 340 and the fixing module 360 in an n-shape so as to have elasticity, and have an n-shaped structure. By applying an elastic force, the fixing end 361 can be pushed to the side when the push bar 330 descends or the pressing end 341 can be pushed to the side when the pressing module 340 rises.

The amount of drug discharged when the push button 310 is pressed once depends on the height at which the pressure module 340 is lowered, and more precisely, based on the distance between the blades formed on the push bar 330, the push button 310 ) It is possible to control the discharged amount by adjusting the descending height.

For example, when the push button 310 is pressed once, when the pressing module 340 sets the blade formed on the push bar 330 to descend by one interval, the piston 221 is pushed only by the interval of one blade. Since it is lowered by the bar 330, only the corresponding volume of the drug can be discharged.

As needed, when the push button 310 is pressed once at intervals of 2 blades, 3 blades, and n blades, the lowered height can be adjusted, and through this, the drug dose discharged once can be controlled. .

The drug discharged by the metered supply unit 300 is supplied to the injection unit 400, and the supplied drug can be penetrated into the skin through the injection needle 431.

In addition, the injection unit 400 is formed so that the injection needle 431 is exposed to the outside or inserted into the inside according to the direction and number of rotation, so that the injection depth can be adjusted according to the length exposed to the outside.

The injection unit 400 can be adjusted so that the injection needle 431 can be exposed to the outside at a required interval, and the injection needle formed inside as the protective cap 440 moves up and down according to the rotation direction of the control ring 450. 431 can protrude to the outside.

The injection needle 431 needs to smoothly inject the drug by varying the protruding height according to the shape, location, and curvature of the skin into which the drug is injected. The injection needle 431 protrudes only by rotating the control ring 450. You can easily adjust the amount.

In addition, since the drug case 200 and the grip case 100 are separable from each other, it is easy to replace the syringe 220 therein, and since the syringe 220 containing the drug is exchanged and used, mixing of drugs can be prevented.

Description of the injection unit 400 will be described in more detail through the accompanying drawings.

3 is an assembly view showing the disassembled injection unit 400 of the drug injection device capable of adjusting the injection depth of the multi-needle according to the present invention, and FIG. 4 is the drug injection device capable of adjusting the injection depth of the multi-needle according to the present invention. An enlarged cross-sectional view of the injection unit 400, and FIG. 5 is a cross-sectional view showing a needle protruding to adjust the injection depth of the drug injection device capable of adjusting the injection depth of a multi-needle according to the present invention.

As shown in FIGS. 3 to 5, the center of the injection unit 400 of the drug injection device capable of adjusting the injection depth of the multi-needle according to the present invention is fixed by inserting the tip of the syringe 220, and the outer surface is a drug case. The connection packing 410 inserted into the 200 to prevent rotation, and the housing formed so that the front end of the connection packing 410 is screwed together and the tip of the syringe 220 is inserted into the rear surface to receive the drug in the front direction. And, a needle module 430 inserted into the front of the housing to prevent rotation and equipped with a plurality of injection needles 431 to inject drugs supplied from the syringe 220, coupled to the front of the housing, and a plurality of A protective cap 440 having a through hole 443 so that the injection needle 431 can protrude to the outside, and a protective cap 440 formed on the outer surface of the housing and moving the protective cap 440 to the front or rear of the housing according to the direction of rotation. It is characterized in that it consists of an adjustment ring 450 for adjusting the height at which the injection needle 431 protrudes by sliding.

In addition, the housing is formed on the outer circumferential surface and has a plurality of guide grooves 441 that prevent the protective cap 440 from rotating and guide it to be slid by the adjusting ring 450, and formed on the outer circumferential surface so that the adjusting ring 450 is in place. It is characterized in that it further comprises a connecting groove 423 for restricting rotation and a fixing rail 424 formed on the inner circumferential surface and preventing the needle module 430 inserted therein from rotating.

In addition, the adjustment ring 450 is formed so that a pair of bodies formed in a semicircular shape can be coupled or separated from each other, and the rear surface has an anti-separation end 453 protruding inward so that it can be constrained to the outer surface of the housing and rotated in place. It is characterized by further including.

The injection unit 400 is largely composed of a connection packing 410, a housing, a needle module 430, a protective cap 440, and an adjusting ring 450.

The connection packing 410 is used to prevent the housing from being separated from the drug case 200 while inducing the housing to be coupled with the syringe 220.

The connection packing 410 is composed of a cylindrical shape with open front and rear surfaces, and a screw thread is formed on the inner circumferential surface of the front surface so that the coupling end 411 formed in the housing can be coupled, and on the rear surface, the tip of the syringe 220 is formed. When the outer circumferential surface is inserted, a cross-shaped coupling end 411 that can be fixed with an interference fit is provided.

In addition, a plurality of anti-rotation ends protrude to the outer surface at regular intervals on the outer circumferential surface of the connection packing 410. In order to prevent rotation after the connection packing 410 is inserted into the lower part of the drug case 200, the anti-rotation end There is provided an anti-rotation groove 230 dug to the inside so that it can be inserted.

That is, when the connection packing 410 is inserted into the lower portion of the drug case 200, it can be prevented from rotating through the anti-rotation end and the anti-rotation groove 230, and the coupling end 411 formed on the rear surface of the syringe 220 It is possible to fix by pressing the outer circumferential surface of the tip of the.

The front and rear surfaces of the housing are open, respectively, and the rear surface is formed so that the tip of the syringe 220 can be inserted into and fixed therein, and the front and rear surfaces of the housing are formed so that the drug discharged from the syringe 220 can move in the front direction. Between the rear surfaces, a passage for transporting the drug is formed.

Fixed rails 424 are formed on both sides of the front of the housing, so that the needle module 430 inserted into the front can be guided so that it can be slid into the housing while preventing it from rotating.

In addition, a plurality of guide ends are formed on the outer circumferential surface of the housing to prevent the protective cap 440 from rotating and induce sliding in one direction when the protective cap 440 for exposing the injection needle 431 to the outside is coupled. In addition, a connection groove 423 is provided on the outer circumferential surface between the front and rear surfaces to constrain the position of the control ring 450 and guide the control ring 450 to rotate in place.

The coupling end 411 formed on the rear surface of the housing is formed to be coupled to the screw thread formed on the inner circumferential surface of the front surface of the connection packing 410, and is inserted into the connection packing 410 while being rotated through the screw thread to be fixed and the syringe 220 ) can be connected to the tip of the

The needle module 430 inserted into the front of the housing has a disc shape, and a plurality of injection needles 431 are provided on the front, so that the drug introduced into the housing can be injected into the skin through the injection needle 431. formed so that

At this time, both sides of the needle module 430 are formed with fixing grooves 432 that are dug inward to be bound to the fixing rails 424 of the housing, and the fixing grooves 432 are combined with the fixing rails 424 to form the housing. It is possible to slide in the inner direction from the front of the.

In addition, when the needle module 430 is inserted into the housing, the outer circumferential surface of the disk of the needle module 430 adheres to the inner circumferential surface of the housing to prevent leakage of the drug to the outside, and if necessary, an O-ring on the outer circumferential surface of the needle module 430 It is also possible to prevent leakage through gaps by forming.

In addition, since the needle module 430 can be separated from the housing, the needle module 430 can be replaced and used when a user changes or an injection drug is changed.

The protective cap 440 is formed on the front of the housing and has an opening on the back so that the front outer circumferential surface of the housing can be inserted into the inside, and the front surface has a plurality of needles 431 of the needle module 430 protruding outward. A through hole 443 is provided.

A plurality of guide grooves 441 are formed on the inner circumferential surface of the rear surface of the protective cap 440 so that the guide end formed in the housing can be inserted, so when the protective cap 440 and the housing are combined, the protective cap 440 It can only move in one direction.

That is, the protective cap 440 cannot rotate independently from the housing through the guide end, but can be rotated along the direction in which the housing rotates, and can be slid only in one direction along the guide end.

In addition, a rotating end 442 formed of a screw thread is formed on the outer circumferential surface of the rear surface of the protective cap 440 so that it can be coupled by the adjusting ring 450.

The adjustment ring 450 surrounds the outer circumferential surface of the protective cap 440 so that the protective cap 440 slides along the central axis of the housing according to the direction of rotation, so that the injection needle 431 passes through the through hole 443 of the protective cap 440. ) is used to adjust the protruding height.

The adjusting ring 450 is formed so that a pair of semicircular bodies are coupled to the outer surface of the housing to which the protective cap 440 is coupled, and one body has a plurality of protruding ends 451 on one side so that the two bodies can be coupled. is provided, and an insertion groove 452 is provided on the opposite body so that the protruding end 451 can be inserted.

That is, the pair of bodies are coupled to each other through the protruding end 451 and the insertion groove 452 to form a cylindrical shape, and one side has a separation preventing end 453 protruding toward the inner circumferential surface, so that the connection groove of the housing ( The release prevention end 453 is located at 423 so that the control ring 450 can be rotated in place without moving.

In addition, a screw thread is formed on the front inner circumferential surface of the adjusting ring 450, and the screw thread is coupled to the rotating end 442 of the protective cap 440.

At this time, since the protective cap 440 can only move in one direction by the guide end and cannot be rotated, when the adjusting ring 450 is rotated in place, the rotating end 442 of the protective cap 440 rotates the adjusting ring 450. It is possible to slide in one direction by the thread of the.

Depending on the direction of rotation of the adjustment ring 450, the protective cap 440 can be brought into close contact with or separated from the housing, and the injection needle 431 is passed through the through hole 443 to the outside according to the change in the position of the protective cap 440. It can be left exposed or inserted inside.

That is, by rotating the adjusting ring 450, the height at which the injection needle 431 protrudes from the protective cap 440 can be adjusted, and the user determines the injection depth according to the shape, location, and curvature of the skin according to the injection location. The injection needle 431 can protrude through the adjusting ring 450 as much as possible.

As described above, according to the drug injection device capable of adjusting the injection depth of the multi-needle according to the present invention, when the drug is pressurized to inject, only a fixed amount is discharged, so that when the drug is injected in a wide range, it is constantly injected into the skin , The height at which the needle is exposed can be adjusted according to the shape or location of the skin where the drug is injected, so the user can inject the drug by penetrating the needle to the depth desired by the user, and replace the needle and the syringe where the drug is stored to prevent medical accidents. There is an effect that can be used by doing.

As described above, the present invention has been described with a focus on preferred embodiments, but those skilled in the art to which the present invention pertains can vary the present invention within the scope not departing from the technical spirit and scope described in the claims of the present invention. It can be implemented by modifying or transforming accordingly. Accordingly, the scope of the present invention should be construed by the claims which are written to include examples of these many variations.

100: grip case
200: drug case
210: support ring
220: syringe
221: Piston
230: anti-rotation groove
300: quantitative supply unit
310: push button
320: return spring
330: push bar
340: pressurization module
341: pressure end
350: pressurized spring
360: fixed module
361: fixed end
370: fixed ring
400: injection part
410: connection packing
411: binding end
412: anti-rotation end
420: housing
421: guide group
422: binding end
423: connection groove
424: fixed rail
430: needle module
431: injection needle
432: fixed groove
440: protective cap
441: guide home
442: rotating end
443: through hole
450: control ring
451: protruding end
452: insertion groove
453: departure prevention group

Claims (6)

a drug case with upper and lower openings and formed to accommodate a syringe containing a drug therein;
a grip case formed on the top of the drug case, having an empty interior, and being able to be gripped by a user;
a fixed-quantity supply unit that is formed inside the grip case and the drug case and pressurizes and discharges the drug contained in the syringe by a push button;
characterized in that it comprises a; injection part coupled to the syringe at the lower part of the drug case and formed to adjust the injection depth by controlling the protruding height of the injection needle.
A drug injection device capable of adjusting the injection depth of a multi-needle.
According to claim 1,
the injection part
Depending on the rotation direction and number of rotations, the injection needle is formed to be exposed to the outside or inserted inside, so that the injection depth can be adjusted according to the length exposed to the outside.
A drug injection device capable of adjusting the injection depth of a multi-needle.
According to claim 1,
the injection part
a connection packing in which the tip of the syringe is inserted and fixed in the center and the outer surface is inserted into the drug case to prevent rotation;
a housing screwed to the front of the connection packing and formed such that the tip of the syringe is inserted into the rear surface to receive the drug in the front direction;
a needle module inserted into the front surface of the housing to be prevented from rotating and provided with a plurality of injection needles to inject the drug supplied from the syringe;
a protective cap coupled to the front surface of the housing and provided with a plurality of through holes to allow the injection needle to protrude to the outside;
It is formed on the outer surface of the housing and adjusts the height at which the injection needle protrudes by sliding the protective cap to the front or rear surface of the housing according to the rotation direction; characterized in that it consists of
A drug injection device capable of adjusting the injection depth of a multi-needle.
According to claim 3,
the housing
a plurality of guide grooves formed on an outer circumferential surface and preventing the protective cap from rotating and guiding the protective cap to be slid by the adjusting ring;
a connection groove formed on an outer circumferential surface and constraining the control ring to be rotated in place;
Characterized in that it further comprises; a fixing rail formed on the inner circumferential surface and preventing the needle module inserted therein from rotating.
A drug injection device capable of adjusting the injection depth of a multi-needle.
According to claim 3,
The control ring is formed so that a pair of bodies formed in a semicircular shape can be coupled or separated from each other,
The rear surface is constrained to the outer surface of the housing and protrudes inward so that it can be rotated in place; characterized in that it further comprises
A drug injection device capable of adjusting the injection depth of a multi-needle.
According to claim 1,
The quantitative supply unit
When the push button is pressed, the piston inside the syringe is moved only once by a set amount to discharge the drug by the moved volume.
A drug injection device capable of adjusting the injection depth of a multi-needle.

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