Transdermal device for soluble microneedle patch

Abstract

The utility model relates to a transdermal device for a soluble microneedle patch, which comprises an outer shell, an inner cavity, an upper end hole, a lower end hole and an elastic arm, the inner cavity is vertically through, the upper end of the outer shell is provided with the upper end hole of the inner cavity, and the lower end of the outer shell is provided with the lower end hole of the inner cavity; the collision column is arranged in the inner cavity of the outer shell in an up-down movable mode, a pushing part for pushing the elastic arm is arranged on the side face of the collision column, the upper end of the collision column is a pressing end, and the lower end of the collision column is a pushing end for pushing transdermal penetration of the microneedle piece; when the strike column is located at the initial position, the elastic arm limits downward movement of the strike column through the pushing part, and when the strike column moves downwards, the pushing part pushes the elastic arm to elastically deform so as to relieve limiting of the elastic arm to the strike column. The elastic arm is matched with the strike column, a returnable pressing structure is provided, follow-up repeated utilization is facilitated, the transdermal device is of a manual structure, and a driving device is not needed; in the structure, only the microneedle patch is a disposable device, the transdermal device can be reused subsequently, and waste of the transdermal device is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of transdermal devices, in particular to a transdermal device for a soluble microneedle patch. Background Art

[0002] A transdermal device is a device that delivers drugs or cosmetic solutions quickly to the superficial dermis of the skin through a transdermal drug delivery system.

[0003] It takes a certain amount of time for the microneedle to leave the skin after entering the skin, so generally speaking, a transdermal device will adopt a non-retractable pressing structure. However, a transdermal device with this structure cannot be reused, or other driving devices are required to assist in pressing, so the transdermal device needs to be equipped with a corresponding driving device.

[0004] Moreover, the existing microneedle assembly and transdermal device are still connected together after use. Forcible separation will cause damage to the transdermal device. Since the microneedle is a disposable device, for safety reasons, the transdermal device and the microneedle assembly will be used as disposable devices, resulting in waste of the transdermal device. Utility Model Content

[0005] The technical problem to be solved by the utility model is: in order to overcome the deficiencies in the prior art, a transdermal device for a soluble microneedle patch is provided.

[0006] The technical solution adopted by the utility model to solve the technical problem is: a transdermal device for a soluble microneedle patch, comprising:

[0007] An outer shell, the outer shell having an inner cavity extending vertically, an upper end hole of the inner cavity at the upper end of the outer shell, a lower end hole of the inner cavity at the lower end of the outer shell, and an elastic arm at the side of the inner cavity;

[0008] The impact column is movably arranged in the inner cavity of the outer shell, and the side of the impact column has a pushing part for pushing the elastic arm, the upper end of the impact column is a pressing end, and the lower end is a pushing end for pushing the microneedle sheet to penetrate the skin;

[0009] Among them, when the collision column is in the initial position, the elastic arm limits the downward movement of the collision column through the pushing part. When the collision column moves downward, the pushing part pushes the elastic arm to elastically deform, thereby releasing the limit of the elastic arm on the collision column.

[0010] Furthermore, it also includes a microneedle patch, which includes a concentrically arranged fixing sheet, a microneedle sheet and an adhesive sticker. The fixing sheet is made of a flexible material that can be elastically deformed. A circular hole is provided at the center of the fixing sheet. The bottom surface of the adhesive sticker is a sticky bottom surface. The sticky bottom surface of the adhesive sticker is bonded to the front surface of the fixing sheet. The microneedle sheet passes through the circular hole of the fixing sheet and is bonded to the sticky bottom surface of the adhesive sticker.

[0011] Several notches are provided around the circular hole to allow the adhesive tape to push the area around the circular hole, expand the circular hole, and then pass through the circular hole.

[0012] The microneedle patch is fixed in the inner cavity of the outer shell by a fixing plate. When the microneedle patch is pushed through the skin, the lower end of the impact column acts on the front of the adhesive patch, pushing the adhesive patch carrying the microneedle patch through the circular hole of the fixing plate and the lower end hole of the outer shell for penetration.

[0013] Furthermore, the outer shell includes a main shell, a lower cover connected to the lower end of the main shell, and an upper cover assembled to the upper end of the main shell.

[0014] The outer fixing sleeve of the collision column is provided with a guide ring to divide the collision column into three parts: upper, middle and lower. The guide ring is provided with a slot, and the push part is located in the slot of the guide ring. The upper end surface of the push part adopts a downward inclined surface, and the lower end surface of the push part adopts an upward inclined surface.

[0015] The elastic arm is located on the inner wall of the main shell body, and is composed of two elastic arm segments which are 90 degrees to each other. One end of the first elastic arm segment is connected to the inner cylindrical wall of the main shell body, and the other end extends into the inner cavity and is connected to the second elastic arm segment. One end of the second elastic arm segment is connected to the first elastic arm segment, and the other end extends downward. A slot is provided on the elastic arm, and a card point is provided in the slot, and a gap is formed between the card point and the two sides, forming a structure in which one end of the card point is fixed to the bottom of the elastic arm and the other end is not constrained.

[0016] Furthermore, the lower cover is provided with a positioning column for assembling the microneedle patch, the lower end hole is located at the lower end of the lower cover, and the four corners of the fixing plate are provided with positioning holes for cooperating with the positioning column to position the microneedle patch.

[0017] Furthermore, the guide ring of the collision column is provided with a guide wing protruding outward, and the main shell is provided with a guide groove penetrating from top to bottom, which is used to cooperate with the guide wing and guide the up and down movement of the collision column.

[0018] Furthermore, a boss is provided at the lower end of the collision column, which acts on the microneedle patch and is used to push the adhesive patch through the circular hole of the fixing plate and then drive the microneedle patch through the lower end hole of the lower cover.

[0019] Furthermore, the upper end of the collision column is equipped with a press cover, and the bottom of the press cover is provided with a buckle A.

[0020] A positioning groove A for assembling and positioning with the buckle A is provided at the upper end of the collision column, and the positioning groove A includes an upper groove A, a side groove A opened on one side of the upper groove A, and a protrusion A located at the connection between the upper groove A and the side groove A.

[0021] Furthermore, a buckle B is provided on the inner wall of the upper cover, and the upper end hole is located at the upper end of the upper cover.

[0022] The outer wall of the main shell at the upper end is provided with a positioning groove B for assembling and positioning with the buckle B. The positioning groove B includes an upper groove B, a side groove B opening on one side of the upper groove B, and a protrusion B located at the connection between the upper groove B and the side groove B.

[0023] Furthermore, the lower cover is threadedly connected to the main shell.

[0024] Furthermore, the outer shell, the collision post and the microneedle patch are concentrically arranged.

[0025] The beneficial effects of the utility model are: the elastic arm structure is used in conjunction with the impact column, so that the transdermal device for the soluble microneedle patch has a retractable pressing structure, which is convenient for subsequent reuse, and the transdermal device adopts a manual structure and does not require a driving device;

[0026] When the transdermal device for the soluble microneedle patch is in use, the adhesive sticker drives the microneedle patch out of the transdermal device structure. After the microneedle patch is used, only the lower cover needs to be unscrewed to remove the fixing sheet and assemble a new microneedle patch. In this structure, only the microneedle patch is a disposable device, and the transdermal device can be reused later, without causing waste of the transdermal device. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 It is a schematic diagram of the explosion structure of the utility model;

[0029] Figure 2 It is a structural schematic diagram of the push cover of the utility model;

[0030] Figure 3 It is a structural schematic diagram of the upper cover of the utility model;

[0031] Figure 4 It is a structural schematic diagram of the collision column of the utility model;

[0032] Figure 5 This utility model Figure 4 A schematic diagram of the local enlarged structure at point A in the middle;

[0033] Figure 6 It is a structural schematic diagram of the main housing of the utility model;

[0034] Figure 7 This utility model Figure 6 A schematic diagram of the local enlarged structure at B in the middle;

[0035] Figure 8 It is a structural schematic diagram of the lower cover of the utility model;

[0036] Fig. 9 It is a schematic diagram of the structure of the microneedle patch of the utility model;

[0037] Fig.10 It is a structural schematic diagram of the fixing plate of the utility model;

[0038] Fig.11 This utility model Fig.10 A schematic diagram of the local enlarged structure at C in the middle;

[0039] Fig.12 This is the assembly diagram of the utility model Figure 1 ;

[0040] Fig.13 This is the assembly diagram of the utility model Figure 2 ;

[0041] Fig.14 This utility model Fig.13 A schematic diagram of the local enlarged structure at D in the middle;

[0042] Fig.15 This is the assembly diagram of the utility model Figure 3 ;

[0043] Fig.16 This utility model Fig.15 A schematic diagram of the local enlarged structure at E in the middle;

[0044] Fig.17 This is the assembly diagram of the utility model Figure 4 ;

[0045] Fig.18 This is a cross-sectional diagram of the utility model. Figure 1 ;

[0046] Fig.19 This is a cross-sectional diagram of the utility model. Figure 2 ;

[0047] Fig. 20 This is a cross-sectional diagram of the utility model. Figure 3 ;

[0048] Fig.21 It is a structural schematic diagram of the microneedle sheet of the utility model.

[0049] Numbers in the figure:

[0050] 1- press cover, 11- buckle A;

[0051] 2-upper cover, 21-buckle B, 22-upper end hole;

[0052] 3-collision column, 31-positioning groove A, 311-upper slot A, 312-side slot A, 313-protrusion A, 32-guide ring, 321-guide wing, 322-pushing part, 33-boss;

[0053] 4-main housing, 41-positioning slot B, 411-upper slot B, 412-side slot B, 413-protrusion B, 42-elastic arm, 43-card point, 44-guide slot;

[0054] 5-lower cover, 51-thread, 52-positioning column, 53-lower end hole;

[0055] 6-microneedle patch, 61-fixing sheet, 611-positioning hole, 612-round hole, 613-notch, 62-adhesive patch, 63-microneedle sheet, 631-microneedle, 632-substrate. DETAILED DESCRIPTION

[0056] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0057] Figure 1-Figure 11 A transdermal device for a dissolvable microneedle patch is shown, comprising:

[0058] The outer shell has an inner cavity that passes through from top to bottom, an upper end hole 22 of the inner cavity is provided at the upper end of the outer shell, a lower end hole 53 of the inner cavity is provided at the lower end of the outer shell, and a spring arm 42 is provided on the side of the inner cavity;

[0059] The impact column 3 is movably disposed in the inner cavity of the outer shell, and the side of the impact column 3 has a pushing portion 322 for pushing the elastic arm 42. The upper end of the impact column 3 is a pressing end, and the lower end is a pushing end for pushing the microneedle sheet to penetrate the skin;

[0060] When the impact column 3 is in the initial position, the elastic arm 42 limits the downward movement of the impact column 3 through the pushing part. When the impact column 3 moves downward, the pushing part 322 pushes the elastic arm 42 to elastically deform, thereby releasing the limit of the impact column 3 by the elastic arm 42. The elastic arm 42 is provided with two groups distributed symmetrically, each group includes two elastic arms, and the two elastic arms 42 in each group form a 45° angle with the center point of the main shell 4.

[0061] The transdermal device for the soluble microneedle patch also includes a microneedle patch 6, which includes a concentrically arranged fixing sheet 61, a microneedle sheet 63 and an adhesive patch 62. The fixing sheet 61 is made of a flexible material that can be elastically deformed. A circular hole 612 is provided at the center of the fixing sheet 61. The bottom surface of the adhesive patch 62 is a sticky bottom surface. The sticky bottom surface of the adhesive patch 62 is bonded to the front surface of the fixing sheet 61. The microneedle sheet 63 passes through the circular hole 612 of the fixing sheet 61 and is bonded to the sticky bottom surface of the adhesive patch 62.

[0062] A plurality of notches 613 are provided around the circular hole 612 to allow the adhesive tape 62 to push the surrounding area of ​​the circular hole 612 to expand the circular hole 612 and then pass through the circular hole 612. There are 12 evenly distributed notches 613 to facilitate the deformation of the fixing sheet 61 to allow the adhesive tape 62 to pass through.

[0063] The microneedle patch 6 is fixed in the inner cavity of the outer shell by the fixing plate 61. When pushing the microneedle patch to penetrate the skin, the lower end of the collision column acts on the front of the adhesive patch 62, pushing the adhesive patch 62 carrying the microneedle patch 63 through the circular hole 612 of the fixing plate 61 and the lower end hole of the outer shell to penetrate the skin.

[0064] The outer shell includes a main shell 4, a lower cover 5 connected to the lower end of the main shell 4, and an upper cover 2 assembled on the upper end of the main shell 4.

[0065] The outer fixing sleeve of the impact column 3 is provided with a guide ring 32 to divide the impact column 3 into three parts: upper, middle and lower. The guide ring 32 is provided with a slot, and the push part 322 is located in the slot of the guide ring 32. The upper end surface of the push part 322 adopts a downward inclined surface, and the lower end surface of the push part 322 adopts an upward inclined surface.

[0066] The elastic arm 42 is located on the inner wall of the main shell 4. The elastic arm 42 consists of two elastic arm segments that are 90 degrees to each other. One end of the first elastic arm segment is connected to the inner cylindrical wall of the main shell 4, and the other end extends into the inner cavity and is connected to the second elastic arm segment. One end of the second elastic arm segment is connected to the first elastic arm segment, and the other end extends downward. A slot is provided on the elastic arm 42, and a card point 43 is provided in the slot, and a gap is formed between the card point 43 and the two sides, forming a structure in which one end of the card point 43 is fixed to the bottom of the elastic arm 42 and the other end is not constrained.

[0067] The lower cover 5 is provided with a positioning column 52 for assembling the microneedle patch 6, the lower end hole 53 is located at the lower end of the lower cover 5, and the four corners of the fixing plate 61 are provided with positioning holes 611 for cooperating with the positioning column 52 to position the microneedle patch 6. There are four positioning columns 52, which cooperate with the positioning holes 611 at the four corners of the fixing plate 61.

[0068] The guide ring 32 of the impact column 3 is provided with a guide wing 321 protruding outward, and the main housing 4 is provided with a guide groove 44 penetrating from top to bottom, which is used to cooperate with the guide wing 321 and guide the up and down movement of the impact column 3. The guide wings 321 are provided in two groups distributed symmetrically, each group includes two, and the two guide wings 321 of each group form an angle of 45° with the center point of the impact column 3.

[0069] A boss 33 is provided at the lower end of the impact column 3, which acts on the microneedle patch 6, and is used to push the adhesive patch 62 through the circular hole 612 of the fixing plate 61, and then drive the microneedle sheet 63 through the lower end hole 53 of the lower cover 5. The design of the boss 33 can make the impact force of the impact column more concentrated, thereby improving the penetration efficiency of the microneedle.

[0070] The upper end of the collision column 3 is equipped with a press cover 1, and the bottom of the press cover 1 is provided with a buckle A11. The upper end of the press cover 1 is designed to be a streamlined curved surface, which is convenient for fingers to press comfortably; the buckle A11 includes two symmetrically distributed ones;

[0071] A positioning groove A31 for assembling and positioning with the buckle A11 is provided at the upper end of the collision column 3. The positioning groove A31 includes an upper groove A311, a side groove A312 opened to one side of the upper groove A311, and a protrusion A313 located at the connection between the upper groove A311 and the side groove A312.

[0072] A buckle B21 is provided on the inner wall of the upper cover 2, and the upper end hole 22 is located at the upper end of the upper cover 2. The buckle B21 includes two symmetrically distributed ones;

[0073] A positioning groove B41 for assembling and positioning with the buckle B21 is provided on the outer wall of the main shell 4 at the upper end. The positioning groove B41 includes an upper groove B411, a side groove B412 opened to one side of the upper groove B411, and a protrusion B413 located at the connection between the upper groove B411 and the side groove B412.

[0074] The lower cover 5 is threadedly connected to the main housing 4 . A thread 51 is provided on the inner wall of the lower cover 5 , and a matching thread is provided on the outer wall of the main housing 4 .

[0075] The outer shell, the collision post 3 and the microneedle patch 6 are concentrically arranged.

[0076] like Fig.21As shown, the microneedle sheet 63 includes a microneedle 631 and a substrate 632. The microneedle 631 is detachably fixed on the substrate 632. The microneedle 631 is made of a biodegradable microneedle material, and one or more active substances for medical or cosmetic purposes are added to the biodegradable microneedle material. After the microneedle 631 penetrates the skin, the microneedle 631 and the substrate 632 are separated so that the microneedle 631 remains in the skin. If the microneedle 631 and the substrate 632 cannot be separated, after the microneedle 631 penetrates the skin, the hard substrate 632 must be pressed against the skin surface, and the substrate 632 can be peeled off only after the drug injection is completed, which causes discomfort to the user.

[0077] The overall assembly includes the following steps:

[0078] In the first step, the guide wing 321 of the striker 3 is slid into the guide groove 44 of the main housing 4. After sliding into a certain distance, the push portion 322 of the striker 3 contacts the clamping point 43 in the main housing 4, and the clamping point 43 temporarily restricts the downward movement of the striker 3. Fig.12 As shown;

[0079] In the second step, the center upper end hole 22 of the upper cover 2 passes through the collision column 3, and the buckle B21 slides into the positioning groove B41 of the main shell 4. Then, the upper cover 2 is rotated clockwise, and the buckle B21 and the semi-cylindrical protrusion B413 in the positioning groove B41 are squeezed against each other and elastically deformed. Finally, the buckle B21 slides over the protrusion B413 and enters the side groove B412, thereby completing the assembly and positioning of the upper cover 2 and the main shell 4. Fig.13 and Fig.14 As shown;

[0080] The third step is to align the cover 1 with the impact column 3 concentrically, put it down vertically, and make the buckle A11 of the cover 1 slide into the positioning groove A31 of the impact column 3, then put the cover 1 into the impact column 3, and then rotate the cover 1 clockwise, so that the buckle A11 slides over the semi-cylindrical protrusion A313 in the positioning groove A31 and enters the side groove A312, as shown in FIG. Fig.15 and Fig.16 As shown;

[0081] In the fourth step, the four positioning holes 611 on the microneedle patch 6 are aligned with the four positioning posts 52 in the lower cover 5, and then the microneedle patch 6 is placed in place to complete the positioning of the microneedle patch 6. Fig.17 As shown;

[0082] In the fifth step, the lower cover 5 with the microneedle patch 6 is aligned concentrically with the main housing 4, and the lower cover 5 is rotated clockwise to be tightly connected with the main housing 4 through threaded connection. When the lower cover 5 and the main housing 4 are assembled, the bottom surface of the main housing 4 will press the four corners of the microneedle patch 6, thereby realizing the secondary positioning of the microneedle patch 6.

[0083] like Fig.18 and Fig.19 As shown, when using the transdermal device, press the cover 1 with a finger. When the cover 1 is subjected to pressure, the pushing portion 322 in the impact column 3 is squeezed with the card point 43 of the main shell 4, and the pushing portion 322 transmits the force to the card point 43. Under the action of the force, the elastic arm 42 is elastically deformed and moves backward with the card point 43. When the elastic arm 42 is bent to a certain extent, the pushing portion 322 slides over the card point 43, and the elastic potential energy accumulated by the compressed and deformed elastic arm 42 is converted into the kinetic energy of the impact column 3, so that the impact column 3 is ejected downward, and the elastic arm 42 returns to its original state. When the impact column 3 moves downward to the position of the lower cover 5, the boss 34 on the impact column 3 contacts the smooth top surface of the adhesive sticker 62 of the microneedle patch 6. Thanks to the structure of the fixing sheet 61, the twelve notches 613 opened on the central circular hole 612 of the fixing sheet 61 make it easy for the adhesive sticker 62 to detach from the fixing sheet 61 and finally reach the skin surface under the push of the impact column 3, while the fixing sheet 61 is still fixed in the lower cover 5 under the restriction of the positioning column 52 and the bottom surface of the main housing 4. The microneedle sheet 63 on the sticky bottom surface of the adhesive sticker 62 penetrates the skin under the continued push of the impact column 3, and the adhesive sticker 62 adheres to the skin surface after the microneedle enters the skin to prevent the microneedle sheet 63 from detaching from the skin.

[0084] like Fig. 20 As shown, when the ejection of the microneedle patch 6 is completed, the lower cover 5 is rotated counterclockwise to detach the lower cover 5 and the fixing sheet 61 fixed therein from the main housing 4. When the transdermal device is used again, the impact column 3 is pushed back along the guide groove 44, and the pushing portion 33 of the impact column 3 contacts the clamping point 43. Since the clamping point 43 is a structure with one end fixed and the other end free, when the clamping point 43 is subjected to the reverse force of the impact column 3, it bends. When the clamping point 43 moves backward to a certain distance, the impact column 3 can slide past the clamping point 43 and return to the state to be ejected.

[0085] The above are only preferred specific implementation methods of the utility model, but the protection scope of the utility model is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the utility model, who makes equivalent replacements or changes based on the technical scheme and utility model concept of the utility model, should be covered by the protection scope of the utility model.

Claims

1. A transdermal device for a soluble microneedle patch, characterized in that: include: An outer shell, the outer shell having an inner cavity that passes through from top to bottom, an upper end hole (22) of the inner cavity at the upper end of the outer shell, a lower end hole (53) of the inner cavity at the lower end of the outer shell, and an elastic arm (42) on the side of the inner cavity; A collision post (3), the collision post (3) is movably arranged in the inner cavity of the outer shell, the side of the collision post (3) has a pushing portion (322) for pushing the elastic arm (42), the upper end of the collision post (3) is a pressing end, and the lower end is a pushing end for pushing the microneedle sheet to penetrate the skin; When the collision column (3) is in the initial position, the elastic arm (42) limits the downward movement of the collision column (3) through the pushing part, and when the collision column (3) moves downward, the pushing part (322) pushes the elastic arm (42) to elastically deform, thereby releasing the limit of the elastic arm (42) on the collision column (3).

2. The transdermal device for a soluble microneedle patch according to claim 1, characterized in that: The microneedle patch (6) further comprises a concentrically arranged fixing sheet (61), a microneedle sheet (63) and an adhesive sheet (62); the fixing sheet (61) is made of a flexible material that can be elastically deformed; a circular hole (612) is provided at the center of the fixing sheet (61); the bottom surface of the adhesive sheet (62) is a sticky bottom surface; the sticky bottom surface of the adhesive sheet (62) is bonded to the front surface of the fixing sheet (61); the microneedle sheet (63) passes through the circular hole (612) of the fixing sheet (61) and is bonded to the sticky bottom surface of the adhesive sheet (62); A plurality of notches (613) are provided in the area surrounding the circular hole (612) so as to allow the adhesive tape (62) to push the area surrounding the circular hole (612) to expand the circular hole (612) and then pass through the circular hole (612). The microneedle patch (6) is fixed in the inner cavity of the outer shell by a fixing plate (61). When the microneedle patch is pushed to penetrate the skin, the lower end of the collision column acts on the front of the adhesive patch (62), pushing the adhesive patch (62) carrying the microneedle patch (63) through the circular hole (612) of the fixing plate (61) and the lower end hole of the outer shell to penetrate the skin.

3. The transdermal device for a soluble microneedle patch according to claim 2, characterized in that: The outer shell comprises a main shell (4), a lower cover (5) connected to the lower end of the main shell (4), and an upper cover (2) assembled on the upper end of the main shell (4). The outer fixing sleeve of the collision column (3) is provided with a guide ring (32) to divide the collision column (3) into three parts: upper, middle and lower parts. The guide ring (32) is provided with a slot. The pushing part (322) is located in the slot of the guide ring (32). The upper end surface of the pushing part (322) adopts a downwardly inclined inclined surface, and the lower end surface of the pushing part (322) adopts an upwardly inclined inclined surface. The elastic arm (42) is located on the inner wall of the main shell (4), and is composed of two elastic arm segments that are 90 degrees to each other. One end of the first elastic arm segment is connected to the inner cylindrical wall of the main shell (4), and the other end extends into the inner cavity and is connected to the second elastic arm segment. One end of the second elastic arm segment is connected to the first elastic arm segment, and the other end extends downward. A slot is provided on the elastic arm (42), and a clamping point (43) is provided in the slot. A gap is formed between the clamping point (43) and two sides, forming a structure in which one end of the clamping point (43) is fixed to the bottom of the elastic arm (42) and the other end is not constrained.

4. The transdermal device for the soluble microneedle patch according to claim 3, characterized in that: The lower cover (5) is provided with a positioning column (52) for assembling the microneedle patch (6), the lower end hole (53) is located at the lower end of the lower cover (5), and the four corners of the fixing plate (61) are provided with positioning holes (611) for cooperating with the positioning column (52) to position the microneedle patch (6).

5. The transdermal device for the soluble microneedle patch according to claim 3, characterized in that: The guide ring (32) of the collision column (3) is provided with a guide wing (321) protruding outward, and the main shell (4) is provided with a guide groove (44) penetrating vertically, which is used to cooperate with the guide wing (321) and guide the vertical movement of the collision column (3).

6. The transdermal device for the soluble microneedle patch according to claim 3, characterized in that: A boss (33) is provided at the lower end of the collision column (3) and acts on the microneedle patch (6) to push the adhesive patch (62) through the circular hole (612) of the fixing plate (61) and then drive the microneedle patch (63) to pass through the lower end hole (53) of the lower cover (5).

7. The transdermal device for a soluble microneedle patch according to claim 1, characterized in that: The upper end of the collision column (3) is equipped with a press cover (1), and the bottom of the press cover (1) is provided with a buckle A (11). The upper end of the collision post (3) is provided with a positioning groove A (31) for assembling and positioning with the buckle A (11), and the positioning groove A (31) includes an upper groove A (311), a side groove A (312) opened to one side of the upper groove A (311), and a protrusion A (313) located at the connection between the upper groove A (311) and the side groove A (312).

8. The transdermal device for a soluble microneedle patch according to claim 3, characterized in that: A buckle B (21) is provided on the inner wall of the upper cover (2), and the upper end hole (22) is located at the upper end of the upper cover (2). The outer wall of the main housing (4) at the upper end is provided with a positioning groove B (41) for assembling and positioning with the buckle B (21), and the positioning groove B (41) includes an upper groove B (411), a side groove B (412) opened to one side of the upper groove B (411), and a protrusion B (413) located at the connection between the upper groove B (411) and the side groove B (412).

9. The transdermal device for a soluble microneedle patch according to claim 3, characterized in that: The lower cover (5) is threadedly connected to the main housing (4).

10. The transdermal device for the soluble microneedle patch according to claim 2, characterized in that: The outer shell, the collision column (3) and the microneedle patch (6) are concentrically arranged.

Images