KR20110045703A - Micro needle apparatus for injecting various kinds of fluid - Google Patents

Abstract

The present invention relates to a microneedle device for multi-fluid injection capable of selectively supplying various types of fluids. A fluid reservoir having at least two fluid cells partitioned in the longitudinal direction, a fluid chamber formed between the microneedle head and the fluid reservoir, and fluid in the fluid cell of the fluid reservoir optionally to the fluid chamber. And fluid selection means for supplying. The fluid discharged from the fluid cell of the fluid reservoir selected by the fluid selection means to the fluid chamber is formed to be discharged to the outside along the plurality of microneedles.

Micro Needle, Fluid Selector, Fluid Storage, Needle Fixing Plate, Fluid Cell

Description

Micro needle apparatus for injecting various kinds of fluid

The present invention relates to a microneedle device capable of delivering a fluid, and more particularly, a fluid such as a drug or cosmetics stored in isolation to prevent side effects that may occur when a mixture of various drugs or cosmetics is injected into the skin. The present invention relates to a microneedle device for multi-fluid injection that can sequentially inject into the skin.

In general, microneedles have been developed to improve the delivery efficiency of cosmetics and drugs and to eliminate pain. Micro needles are used as induction mechanisms to form fine pores in the skin and to increase the efficiency by delivering drugs or cosmetics through the formed pores into the skin. Korean Utility Model Patent No. 20-0431404 is an induction mechanism device having a microneedle attached, and after the formation of micropores, some drugs are absorbed through micropores, resulting in partial improvement of drug delivery efficiency. In addition, Korean Patent No. 10-0781702 proposes a method of manufacturing a hollow microneedle. However, these devices or methods cannot be supplied sequentially by selecting drugs or cosmetics when it is necessary to supply and treat several drugs or cosmetics sequentially due to the nature of drugs or cosmetics. There is a problem that the drug cannot be injected or sprayed into the skin at the same time.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and an object thereof is to provide a microneedle device for injecting multiple fluids capable of storing various types of fluids such as drugs and cosmetics and selectively transferring them into the skin.

In addition, another object of the present invention is to provide a microneedle device for multi-fluid injection that can simultaneously infiltrate fluid such as drugs or cosmetics into the skin at the moment of injection of the microneedle.

An object of the present invention as described above, the microneedle head is provided with a plurality of microneedles; A fluid reservoir disposed above the microneedle head and having at least two fluid cells partitioned in a longitudinal direction to receive a fluid; A fluid chamber formed between the microneedle head and the fluid reservoir; And fluid selection means for selectively supplying fluid from the fluid cell of the fluid reservoir to the fluid chamber, wherein the fluid discharged from the fluid cell of the fluid reservoir selected by the fluid selection means to the fluid chamber is It may be achieved by a microneedle device for multi-fluid injection formed to be discharged to the outside along the plurality of microneedles.

At this time, the fluid selection means, the hollow housing is formed so that the fluid storage portion to rotate inside; A blocking plate formed at a lower end of the housing and having a selection hole formed to correspond to an outlet of one fluid cell of the fluid storage part; A selection knob installed at an upper end of the fluid reservoir; And an upper cap that blocks an upper portion of the fluid reservoir and supports the selection knob to rotate. When the selection knob rotates, the fluid reservoir rotates inside the housing.

In addition, the fluid selection means, the lower end of the fluid reservoir is installed so as to rotate to block the lower end of the plurality of fluid cells, the rotation having a selection hole corresponding to the lower end of one fluid cell of the plurality of fluid cells Blocking plate; A selection knob installed at an upper end of the fluid storage part to rotate while blocking an upper end of the plurality of fluid cells; And a rotary rod penetrating the fluid storage unit and connecting the rotary blocking plate and the selection knob. When the selection knob rotates, the rotary blocking plate may be formed to rotate integrally with the rotary rod.

At this time, the fluid selection means may further include a position fixing member for fixing the position of the rotary shielding plate.

The fluid selecting means may include a sealing cap installed at a lower end of the fluid storage part and sealing a lower end of the fluid cell; A connecting rod extending from the sealing cap to protrude through the fluid cell; Pushing portion is installed on the top of the connecting rod; And an elastic member installed between an upper end of the fluid storage part and the pressing part to elastically support the pressing part to seal the lower end of the fluid cell with the sealing cap. When the pressing part is pressed, the elastic member is compressed. The sealing cap may be formed to open the lower end of the fluid cell.

In addition, the microneedle head includes a needle fixing plate and a needle cover, and the needle fixing plate is formed with a plurality of needle holes to which the micro needles are fixed, and may be formed on the outer circumference of each needle hole.

According to the microneedle device for multi-fluid injection according to an embodiment of the present invention having the structure as described above, various kinds of fluids stored in the fluid storage portion can be selectively and simply supplied to the skin by the fluid selection means.

In addition, the drug or cosmetics selected by the fluid selection means are micro-needles when the micro-needle invades the skin because the micro-needles flow out the fluid such as drugs or cosmetics through the minute holes formed on the outer periphery of the needle holes of the needle fixing plate where the needles are installed. It penetrates the skin and penetrates into the skin, thus increasing drug delivery efficiency.

Hereinafter, with reference to the accompanying drawings will be described an embodiment of a multi-needle fluid injection microneedle device according to the present invention.

However, in the following description of the present invention, if it is determined that the detailed description of the related known functions or components may unnecessarily obscure the subject matter of the present invention, the detailed description and the detailed illustration will be omitted.

1 is a cross-sectional view showing a microneedle device for multi-fluid injection in accordance with a first embodiment of the present invention, Figure 2 is a cross-sectional view of the micro-needle device for multi-fluid injection in Figure 1 cut out in the line 2-2. 3 is a cross-sectional view of the multi-needle fluid injection microneedle device of FIG. 4 is a rear view of the needle fixing plate of the multi-needle fluid injection microneedle device of FIG. 1, and FIG. 5 is a cross-sectional view taken along the line 5-5 of the needle fixing plate of FIG. 4.

In the following description, "fluid" refers to a liquid or gel-like material that is easily deformed and has a flowing property and is not defined in shape, and the fluid may include a drug or a cosmetic.

Referring to FIG. 1, the microneedle device 1 for multi-fluid injection according to the first embodiment of the present invention includes a microneedle head 10, a fluid reservoir 31, a fluid chamber 20, and a fluid selecting means. (30).

The microneedle head 10 is provided with a plurality of micro needles 13 that can penetrate into the skin, and may include a needle fixing plate 11 and a needle cover 12.

1, 4, and 5, the needle fixing plate 11 is formed with a plurality of needle holes 14 to which the microneedle 13 is coupled. The needle hole 14 is formed to a depth that does not penetrate the needle fixing plate 11, and is formed to a diameter that can accommodate the micro needle (13). 15 may be formed on the outer circumference of each needle hole 14. The fluid passage hole 15 is formed to penetrate the needle fixing plate 11. Accordingly, the fluid on the upper surface 11a of the needle fixing plate 11 flows toward the lower surface 11b of the needle fixing plate 11 through the fluid through hole 15, thereby connecting the microneedle (1) coupled to the needle hole 14. 13). In this embodiment, as shown in Figure 4, the needle fixing plate 11 is formed of six rows of six needle holes 14 at regular intervals. In addition, on the outer circumference of each of the needle holes 14, a smaller fluid passage hole 15 is formed which is much smaller in diameter than the needle holes 14 but through which the fluid can pass. The fluid through holes 15 are formed at respective needle holes 14 at intervals of 180 degrees, so as to avoid interference with the fluid through holes 15 of the immediately adjacent needle holes 14 and to improve the fluid discharge effect. It may be formed to be arranged as shown in FIG. That is, when (15) is formed in a horizontal state in the needle hole 14-1 at the top right in FIG. 4, (15) formed in the needle hole 14-2 immediately adjacent to it is in a vertical state. To form. In addition, such an arrangement is preferably formed for all the needle holes 14.

The microneedle 13 coupled to the needle hole 14 of the needle fixing plate 11 serves to penetrate the skin and form micropores. Here, the 'coupling' of the microneedles 13 is not only to couple the microneedles 13 directly to the needle holes 14 in a manner such as bonding or adhering, such as to attach or fix the needles 14, The concept also includes a case in which the microneedle 13 is press-fitted into the needle hole 14. Alternatively, the needle hole 14 and the micro needle 13 may be screwed together.

The microneedle 13 is not particularly limited as long as it can penetrate the skin. However, the microneedle 13 may be formed of a head, a body, and an insertion part like the general microneedle 13. The head portion is a portion in which the microneedle 13 is coupled to the needle hole 14 of the needle fixing plate 11 and has a larger diameter than the body portion, and the insertion portion is a portion in which the microneedle 13 is inserted into the skin. The length and diameter of the microneedles 13 are not particularly limited. In addition, the insertion portion is not particularly limited in shape or outer diameter, so long as it does not feel pain when inserted into the skin, the outer diameter is 1㎛ to 100㎛, by grinding the end of the insertion portion at an angle of 37 to 44 degrees Can be used.

In addition, the microneedle 13 is not particularly limited as long as it is used in the technical field of the present invention, but may be acrylic, polyacrylate, polycarbonate, epoxy, polyester, polyether ether ketone, polyvinyl chloride, polyolefin. It may be prepared using a resin composition, such as liquid crystal polyester or a composite thereof, and may be manufactured using a metal material including stainless steel or another metal.

The needle cover 12 is for protecting the plurality of micro needles 13 fixed to the needle fixing plate 11, and a plurality of through holes 12a corresponding to the plurality of micro needles 13 are formed. The fluid discharged through the fluid through hole 15 of the needle fixing plate 11 is discharged to the outside through the gap between the micro needle 13 and the through hole 12a of the needle cover 12. In addition, the needle cover 12 may serve to fix the needle fixing plate 11 to the fluid chamber 20 as shown in FIG. 1.

The fluid reservoir 31 is provided on the upper side of the microneedle head 10 and includes at least two fluid cells 36 which are partitioned in a longitudinal direction so as to accommodate various kinds of fluids. . The fluid reservoir 31 is formed in a hollow cylindrical shape so as to rotate inside the housing 38, and the inside of the fluid reservoir 31 is a partition wall 32 in the longitudinal direction of the fluid reservoir 31. It is partitioned into more than 33 spaces 33. In the present embodiment, as shown in FIG. 2, the fluid reservoir 31 is divided into four fluid cells 33 by the cross partition 32. Here, the fluid reservoir 31 is merely an example in which four fluid cells 33 are partitioned, and the fluid reservoir 31 may be partitioned into two or more fluid cells 33 as necessary. Each fluid cell 33 may be stored with different kinds of fluids. The lower end 34 of each fluid cell 33 is formed with an outlet 35 so that the fluid can be discharged.

Under the fluid reservoir 31 is provided a fluid chamber 20 for receiving fluid discharged from the fluid cell 33 through the outlet 34. That is, the fluid chamber 20 is provided between the microneedle head 10 and the fluid storage part 31 to form a space 21 for temporarily storing the fluid discharged from the fluid cell 33. In the present embodiment, the fluid chamber 20 may be formed into a hollow cylindrical shape having an outer diameter substantially the same as that of the housing 38 described later. The fluid in the internal space 21 of the fluid chamber 20 is discharged to the outside through the plurality of fluid through holes 15 formed in the needle fixing plate 11 of the microneedle head 10.

The fluid selecting means 30 selects one of the fluid cells 33 of the plurality of fluid cells 33 of the fluid reservoir 31 so that the fluid stored in the selected fluid cell 33 is filled with the fluid chamber 20. It is to be discharged to the micro needle head 10 through. Such fluid selection means 30 can be configured in various forms.

In this embodiment, the user is configured to rotate the fluid storage unit 31 so as to select one of the plurality of fluid cells 33 formed in the fluid storage unit 31.

Fluid selection means 30 according to the present embodiment is a hollow housing 38 formed so that the above-described fluid reservoir 31 can be rotated in its interior, and the blocking formed on the lower end 38c of the housing 38. Plate 38a. The lower end 38c of the housing 38 is formed to be inserted into the fluid chamber 20. Between the blocking plate 38a and the lower end 34 of the fluid storage unit 31, the fluid storage unit 31 may rotate with respect to the blocking plate 38a, and the plurality of fluid cells of the fluid storage unit 31 ( A sealing member (not shown) may be installed to prevent different fluids stored in 33 from leaking and mixing. In addition, as shown in FIGS. 1 and 3, the blocking plate 38a is provided with a selection hole 38b corresponding to the outlet 35 of the one fluid cell 33 of the fluid reservoir 31. Therefore, when the fluid reservoir 31 is rotated to match the outlet 35 of one fluid cell 33 of the plurality of fluid cells 33 with the selection hole 38b, the fluid of the fluid cell 33 is selected. It is discharged to the fluid chamber 20 through 38b.

At the upper end of the fluid reservoir 31, a selection knob 37 is installed to allow the user to turn the fluid reservoir 31. In addition, an upper cap 39 is provided at the upper portion 38d of the housing 38 to block the upper portion of the fluid reservoir 31. The upper cap 39 is formed with a support hole 39a for supporting the support shaft 37a so that the selection knob 37 can rotate. Therefore, the support shaft 37a of the selection knob 37 can pivot in the support hole 39a of the upper cap 39. When the user grabs the selection knob 37 and rotates it in the direction of arrow A as shown in FIG. 1, the fluid storage part 31 rotates in the direction of arrow A in the housing 38. Accordingly, the selection knob 37 is rotated to select one of the fluid cells 33 of the plurality of fluid cells 33 of the fluid reservoir 31 so that the outlet 35 thereof is blocked by the blocking plate of the housing 38. When coinciding with the selection hole 38b formed in 38a, the fluid of the selected fluid cell 33 is discharged to the fluid chamber 20 through the selection hole 38b.

Hereinafter, the operation of the multi-needle fluid injection microneedle device 1 according to the first embodiment of the present invention will be described with reference to FIG. 1.

The user grabs and rotates the selection knob 37 to align one of the plurality of fluid cells 33 of the fluid reservoir 31 with the selection hole 38b of the blocking plate 38a. Then, the fluid stored in the selected fluid cell 33 is discharged to the fluid chamber 20 through the selection hole 38b. The fluid discharged to the fluid chamber 20 is discharged toward the plurality of micro needles 13 through the plurality of fluid through holes 15 formed in the needle fixing plate 11 of the micro needle head 10. The discharged fluid may move along the microneedles 13 and invade into the skin.

When one kind of fluid is completely discharged, the user turns the selection knob 37 again to align the other fluid cell 33 of the fluid reservoir 31 with the selection hole 38b of the blocking plate 38a. Then, the fluid of the selected fluid cell 33 is discharged into the fluid chamber 20 through the selection hole 38b. The fluid discharged into the fluid chamber 20 penetrates into the skin along the plurality of microneedles 13 as described above.

6 is a cross-sectional view illustrating a microneedle device for multi-fluid injection according to a second embodiment of the present invention, and FIG. 7 is a cross-sectional view of the multi-needle fluid injection microneedle device of FIG.

Hereinafter, a multi-needle fluid injection microneedle device 2 according to a second embodiment of the present invention will be described with reference to FIGS. 6 and 7.

The microneedle device 2 for multi-fluid injection according to the second embodiment of the present invention may include a microneedle head 10, a fluid chamber 20, a fluid reservoir 40, and a fluid selector 50. Can be.

The microneedle head 10 is provided with a plurality of microneedles 13 that can penetrate into the skin, and the same may be the same as or similar to the microneedle head 10 according to the first embodiment. Omit.

The fluid chamber 20 temporarily stores the fluid discharged from the fluid storage unit 40 to be discharged along the plurality of microneedles 13 of the microneedle head 10, and the fluid according to the first embodiment described above. Since the same or similar to the chamber 20 can be used, detailed description thereof will be omitted.

The fluid reservoir 40 is installed above the fluid chamber 20 above the microneedle head 10 and includes at least two fluid cells 42 longitudinally partitioned to accommodate various types of fluids. Equipped. In the present embodiment, as shown in FIGS. 6 and 7, six through holes 42 are formed in the cylindrical body 41 in the longitudinal direction, and the six through holes 42 have different kinds of fluids. Form a fluid cell to be stored. As described above, forming the plurality of fluid cells 42 is only an example, and the fluid cells 42 may be formed by using the partition wall 32 in a hollow cylinder like the fluid storage part 31 of the first embodiment described above. It may be. In addition, the number of fluid cells 42 is not limited to six, and may be formed in two or more appropriate numbers as necessary.

The fluid selector 50 selects one of the fluid cells 42 of the plurality of fluid cells 42 of the fluid reservoir 40 so that the fluid stored in the selected fluid cell 42 is stored in the fluid chamber 20. In order to be discharged to the micro-needle head 10 through the, in the present embodiment, the fluid reservoir 40 is in a stationary state and a plurality of formed in the fluid reservoir 40 by rotating the rotary blocking plate 51 One of the fluid cells 42 is configured to be selected. Therefore, the fluid selecting means 50 according to the present embodiment may include a rotary blocking plate 51, a selection knob 54, and a rotary rod 53. have.

The rotary blocking plate 51 is installed at the lower end of the fluid storage part 40 so as to rotate while blocking an outlet 41a at the lower end of the plurality of fluid cells 42, and one of the plurality of fluid cells 42 is rotated. The selection hole 52 corresponding to the discharge port 41a of the fluid cell 42 is provided. Between the rotation blocking plate 51 and the lower surface of the fluid storage unit 40, the rotation blocking plate 51 may rotate relative to the lower surface of the fluid storage unit 40, and the plurality of fluid cells of the fluid storage unit 40 may be rotated. A sealing member (not shown) may be installed to prevent the different fluids stored in the 42 from leaking and mixing.

The selection knob 54 is installed on the upper end of the fluid storage part 40 to rotate while blocking the upper ends of the plurality of fluid cells 42. Thus, the selection knob 54 may be formed of a disc of diameter less than or equal to the diameter of the fluid reservoir 40.

The rotating rod 53 penetrates the center hole 44 of the fluid storage unit 40 and is installed to connect the rotation blocking plate 51 and the selection knob 54. Therefore, when the user rotates the selection knob 54, the rotary rod 53 installed on the lower end of the selection knob 54 rotates, and when the rotary rod 53 rotates, the rotary blocking plate connected to the lower end of the rotary rod 53 ( 51 rotates integrally with the rotating rod (53).

In addition, the fluid selection means 50 according to the present embodiment may further include a position fixing member 23 for fixing the position of the rotation blocking plate 51. The position fixing member 23 forms a hole in one side of the fluid chamber 20 as shown in FIG. 6, and inserts the ball 24 and the spring 25 into the hole so that the ball 24 is the spring 25. It is elastically supported by the can be formed to maintain the contact with the rotational blocking plate (51). And when the selection hole 52 coincides with the outlet 41a of the fluid cell 42, a groove (not shown) into which the ball 24 can be inserted into the side of the rotary blocking plate 51 facing the ball 24 (not shown). Can be easily matched to the fluid cell 42, and the selection hole 52 coincides with the outlet 41a of the fluid cell 42. At this time, the rotation blocking plate 51 can be prevented from freely rotating. As the position fixing member 23, a ball plunger may be used.

In Fig. 6, when the user grabs the selection knob 54 and turns it in the direction of the arrow B, the rotation blocking plate 51 also rotates in the direction of the arrow B. The selection hole 52 formed in the rotary blocking plate 51 by the rotation of the rotary blocking plate 51 is discharge port 41a of one of the fluid cells 42 of the plurality of fluid cells 42 of the fluid storage unit 40. ), The fluid of the selected fluid cell 42 is discharged into the fluid chamber 20 through the selection hole 52. The fluid discharged into the fluid chamber 20 may penetrate into the skin through the microneedle head 10.

FIG. 8 is a cross-sectional view illustrating a microneedle device for multi-fluid injection according to a third embodiment of the present invention, and FIG. 9 is a cross-sectional view of the microneedle device for multi-fluid injection in FIG. 8 taken along line 9-9.

Hereinafter, a multi-needle fluid injection microneedle device 3 according to a third embodiment of the present invention will be described with reference to FIGS. 8 and 9.

The multi-needle fluid injection microneedle device 3 according to the third embodiment of the present invention may include a microneedle head 10, a fluid chamber 20, a fluid reservoir 60, and a fluid selector 70. Can be.

Since the microneedle head 10 and the fluid chamber 20 may be the same as or similar to the microneedle head 10 and the fluid chamber 20 according to the first embodiment, detailed descriptions thereof will be omitted.

The fluid reservoir 60 is installed above the microneedle head 10 and includes at least two fluid cells 62 longitudinally partitioned to accommodate at least two types of fluids. In the present embodiment, as shown in FIGS. 8 and 9, four through holes 62 are formed in the cylindrical body 61 in the longitudinal direction, and the four through holes 62 are stored with different fluids. Form a fluid cell. In addition, the number of the fluid cells 62 is not limited to four, but may be formed in two or more suitable number depending on the type of fluid required.

The fluid selector 70 selects a fluid cell 62 of a plurality of fluid cells 62 of the fluid reservoir 60 so that the fluid stored in the selected fluid cell 62 is stored in the fluid chamber 20. By discharging to the micro-needle head 10 through, in the present embodiment, the fluid reservoir 60 is in a stationary state and the sealing cap 71 provided at the bottom of each fluid cell 62 is lowered. The fluid of the fluid cell 62 is configured to be discharged to the fluid chamber 20. Accordingly, the fluid selecting means 70 according to the present embodiment includes a sealing cap 71, a connecting rod 72, a pressing part 73, And an elastic member 74.

The sealing cap 71 is installed at the lower end of the fluid storage part 60 to seal each lower end of the plurality of fluid cells 62. In the present embodiment, since there are four fluid cells 62 in the fluid reservoir 60, four sealing caps (for sealing the outlets of the four fluid cells 62 at the lower end of the fluid reservoir 60) 71) is installed.

The connecting rod 72 is installed to extend from the upper side of the sealing cap 71 to protrude through the fluid cell 62. The pressing part 73 is installed at the upper end of the connecting rod 72 protruding outward from the fluid cell 62. The elastic member 74 is installed between the upper end of the fluid cell 62 and the pressing part 73 so that the sealing cap 71 seals the lower end of the fluid cell 62 so as to prevent the fluid from leaking. Elastic support. Therefore, the upper end of the fluid storage portion 60 accommodates the elastic member 74 and the pressing portion 73, the settled diameter larger than the diameter of the fluid cell 62 to guide the movement of the pressing portion 73 It is preferable to form the groove 63.

When the user presses the pressing portion 73 of the fluid cell 62 in which the desired fluid is stored among the pressing portions 73, the elastic member 74 is compressed and the connecting rod 72 is compressed as shown in FIG. It moves down inside the fluid cell 62. When the connecting rod 72 is lowered, the sealing cap 71 installed at the lower end of the connecting rod 72 is moved downward to open the outlet of the lower end of the fluid cell 62. When the fluid cell 62 is open, the fluid is discharged into the fluid chamber 20. The fluid discharged into the fluid chamber 20 may penetrate into the skin through the microneedle head 10 as described above.

The multi-needle fluid injection microneedle device (1, 2, 3) according to the embodiments of the present invention as described above can be used to store two or more fluids, and can penetrate the user's desired fluid into the skin in the desired order. This is convenient and can increase the therapeutic effect.

The present invention is not limited to the above-described specific embodiments, and simple components that can be carried out by those skilled in the art without departing from the spirit of the present invention described in the claims below. Substitutions, additions, deletions, and alterations of are within the scope of the claims.

1 is a cross-sectional view showing a microneedle device for multi-fluid injection in accordance with a first embodiment of the present invention;

FIG. 2 is a cross-sectional view of the microneedle device for multi-fluid injection of FIG. 1 taken along line 2-2; FIG.

3 is a cross-sectional view taken along the line 3-3 of the multi-needle fluid injection microneedle device of FIG.

4 is a rear view of the needle holding plate of the multi-needle fluid injection microneedle device of FIG.

5 is a cross-sectional view taken along the line 5-5 of the needle fixing plate of FIG. 4;

6 is a cross-sectional view showing a microneedle device for multiple fluid injection in accordance with a second embodiment of the present invention;

FIG. 7 is a cross-sectional view of the microneedle device for multiple fluid injection in FIG. 6 taken along line 7-7; FIG.

8 is a cross-sectional view showing a microneedle device for multiple fluid injection in accordance with a third embodiment of the present invention;

FIG. 9 is a cross-sectional view of the multi-needle fluid injection microneedle device of FIG. 8 taken along line 9-9; FIG.

FIG. 10 is a cross-sectional view illustrating a state in which fluid is discharged from the microneedle device for multi-fluid injection of FIG. 8.

* Description of the symbols for the main parts of the drawings *

1,2,3; Micro Needle Device for Multiple Fluid Injection

10; Micro needle head 11; Needle fixing plate

12; Needle cover 13; Micro needle

14; Needle hole 15; Fluid passing hole

20; Fluid chamber 23; Position fixing member

30,50,70; Fluid selection means 31,40,60; Fluid reservoir

32; Bulkheads 33,42,62; Fluid cell

35; Outlet 37,54; Selection

38; Housing 38a; Blocking plate

41,61; Body 51; Revolving Block

52; Selector 53; Spinning rod

63; Settling groove 71; Sealing cap

72; Connecting rod 73; Press

74; Elastic member

Claims (6)

A microneedle head provided with a plurality of microneedles; A fluid reservoir disposed above the microneedle head and having at least two fluid cells partitioned in a longitudinal direction to receive a fluid; A fluid chamber formed between the microneedle head and the fluid reservoir; And And fluid selection means for selectively supplying fluid from the fluid cell of the fluid reservoir to the fluid chamber. And the fluid discharged from the fluid cell of the fluid reservoir selected by the fluid selection means to the fluid chamber is discharged to the outside along the plurality of microneedles. The method of claim 1, The fluid selection means, A hollow housing formed to allow the fluid reservoir to rotate inside; A blocking plate formed at a lower end of the housing and having a selection hole formed to correspond to an outlet of one fluid cell of the fluid storage part; A selection knob installed at an upper end of the fluid reservoir; And And an upper cap which blocks an upper portion of the fluid storage part and supports the selection knob to rotate. And the selection knob rotates, wherein the fluid reservoir rotates inside the housing. The method of claim 1, The fluid selection means, A rotation blocking plate installed at a lower end of the fluid storage unit to rotate while blocking a lower end of the plurality of fluid cells and having a selection hole corresponding to a lower end of one fluid cell of the plurality of fluid cells; A selection knob installed at an upper end of the fluid storage part to rotate while blocking an upper end of the plurality of fluid cells; And And a rotary rod penetrating through the fluid storage unit and connecting the rotary blocking plate and the selection knob. And the rotation knob is rotated integrally with the rotary rod when the selection knob rotates. The method of claim 3, wherein And a position fixing member for fixing the position of the rotational blocking plate. The method of claim 1, The fluid selection means, A sealing cap installed at a lower end of the fluid storage part and sealing a lower end of the fluid cell; A connecting rod extending from the sealing cap to protrude through the fluid cell; Pushing portion is installed on the top of the connecting rod; And And an elastic member installed between an upper end of the fluid storage part and the pressing part to elastically support the pressing part so that the sealing cap seals the lower end of the fluid cell. When the pressing portion is pressed, the elastic member is compressed so that the sealing cap opens the lower end of the fluid cell, multi-needle fluid injection micro-needle device. The method of claim 1, The micro needle head includes a needle fixing plate and a needle cover, The needle holding plate is formed with a plurality of needle holes for fixing the micro needle, the microneedle device for multi-fluid injection, characterized in that at least one fluid through-hole is formed in the outer periphery of each needle hole.

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