Intradermal injection aids

Abstract

To provide an intracutaneous injection aid that allows an injection needle to be stuck into the skin easily and accurately.SOLUTION: An intracutaneous injection aid 1 includes: a holding part 3 for holding an injection needle 2; and a stretching part 4 to be pressed against the surface of the skin to stretch the skin, which is disposed at a position separated from the tip of the injection needle 2 by a predetermined distance in a direction along a center line of the injection needle 2 on a virtual plane that includes the center line of the injection needle and spreads in a lateral width direction of the intracutaneous injection aid 1. The stretching part 4 includes a stretching surface whose inclination angle with respect to the virtual plane is set to an angle in a range from a minimum angle to a maximum angle of the sticking angle of the injection needle 2.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to an intradermal injection assisting device for assisting intradermal injection. [Background technology]

[0002] Conventionally, various types of intradermal injection aids have been proposed. For example, the intradermal injection aid (intradermal injection adapter) disclosed in Patent Document 1 includes a cylindrical adapter main body into which a syringe can be inserted and removed from the rear end, and a distal part provided on the front end side of the adapter main body for stretching the skin.

[0003] The adapter body is configured so that the syringe inserted therein can slide axially.

[0004] The distal portion has a skin contact surface that is pressed against the skin and is bent at an obtuse angle. More specifically, the skin contact surface includes a first skin contact surface formed to block the opening at the tip end of the adapter body and a flat second skin contact surface extending forward from the first skin contact surface along the axial direction of the adapter body, and the first skin contact surface has a needle opening through which an injection needle (puncture needle) of a syringe inserted into the adapter body can enter and leave the adapter body.

[0005] When performing an intradermal injection using such an adapter for intradermal injection, a portion of the skin is depressed and stretched by the first main skin contact surface, and then the second skin contact surface is abutted against the skin, so that the orientation of the adapter main body and the syringe is horizontal or approximately horizontal with respect to the skin surface (the skin surface against which the second skin contact surface is abutting).

[0006] When the syringe is advanced within the adapter body, the puncture needle advances to the outside through the needle opening, whereby the puncture needle, which is horizontal or approximately horizontal to the skin surface, pierces the extended skin.

[0007] In this manner, the intradermal injection adapter is configured to stretch the skin at the distal portion and orient the needle before inserting the needle into the skin. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] Patent No. 5213950 Summary of the Invention [Problem to be solved by the invention]

[0009] Incidentally, with the above-mentioned conventional adapters for intradermal injection, it is necessary to press the first skin contact main surface against the skin to stretch the skin and to abut the second skin contact main surface against the skin to determine the orientation of the syringe (puncture needle), and then to pierce the skin with the puncture needle while maintaining the first skin contact main surface pressed against the skin. However, the adapter may move between pressing the first skin contact main surface against the skin and piercing the skin with the puncture needle, which may result in the puncture position or angle of the puncture needle being shifted.

[0010] Furthermore, with the above-mentioned conventional adapter for intradermal injection, the operation of pressing the first main skin contact surface against the skin, i.e., the operation of stretching the skin, and the operation of inserting the puncture needle into the skin must be performed separately, making the procedure for performing an intradermal injection complicated.

[0011] As described above, when performing intradermal injection using the above-mentioned conventional intradermal injection adapter, it was difficult to accurately insert the puncture needle into the skin, and the procedure for inserting the puncture needle into the skin was complicated.

[0012] In view of the above circumstances, an object of the present invention is to provide an auxiliary tool for intradermal injection that enables an injection needle to easily and accurately puncture the skin when performing an intradermal injection. [Means for solving the problem]

[0013] The intradermal injection aid of the present invention comprises: A holder for holding an injection needle; an extension part that is pressed against a surface of the skin to extend the skin, the extension part being disposed at a position spaced a predetermined distance from the tip of the injection needle in a direction along the center line on an imaginary plane that includes the center line of the injection needle and extends in a lateral width direction; The extension portion has an extension surface whose inclination angle with respect to the imaginary plane is set to an angle within a range from a minimum angle to a maximum angle of the puncture angle of the injection needle.

[0014] According to the intradermal injection auxiliary device having the above-described configuration, the inclination angle of the extension surface relative to the virtual plane is set to an angle within the range of the puncture angle of the injection needle, so that when the extension surface is brought into contact with the skin, the injection needle is inclined relative to the skin within the range of the puncture angle.

[0015] Then, when the extension part is moved forward and pressed into the skin with the extension surface, the skin between the tip of the needle and the extension part is stretched and the needle pierces the skin while maintaining its inclination (inclination relative to the skin).

[0016] In this way, the intradermal injection assisting device having the above configuration can insert the injection needle into the skin while keeping it tilted at an angle within the range of the minimum and maximum puncture angles during the process of stretching the skin.

[0017] The intradermal injection aid of the present invention comprises: The injection needle may further include a pair of protective portions that are arranged on the imaginary plane and on both sides of the injection needle in the lateral width direction.

[0018] According to this configuration, the extension part is disposed in front of the injection needle on the imaginary plane, and the protective parts are disposed on both sides of the injection needle, so that the injection needle is surrounded by the extension part and the protective parts. Therefore, the intradermal injection auxiliary device configured as above can prevent the injection needle from accidentally coming into contact with the human body, etc., and can prevent the injection needle from piercing the skin in an incorrect position.

[0019] Furthermore, in the intradermal injection auxiliary device of the present invention, The protection portion may be disposed with a gap between it and the injection needle in the lateral width direction.

[0020] In intradermal injections, as the injection fluid is injected into the dermis, the surface of the skin partially swells to form a bulge. With the intradermal injection aid configured as described above, however, a space is formed between the injection needle and the extension section and protective section arranged around the injection needle, so that the formation of the bulge, i.e., the injection of the injection fluid into the dermis, is less likely to be hindered.

[0021] In the intradermal injection assisting device of the present invention, A deep insertion prevention portion may be formed on the underside of the tip end of the holding portion, the deep insertion prevention portion bulging downward more than the underside of the rear end of the holding portion.

[0022] According to this configuration, the underside of the tip end of the holding part is formed with a deep penetration prevention part that bulges downward more than the underside of the rear end, so that when the extension surface is pressed into the skin, the operation of pressing the extension surface, i.e., the operation of piercing the injection needle into the skin, can be stopped when the deep penetration prevention part comes into contact with the skin. Therefore, the intradermal injection auxiliary device of the above configuration can prevent the injection needle from being pierced excessively into the skin.

[0023] In this case, the underside of the deep insertion prevention portion may include an angle limiting surface whose inclination angle with respect to the imaginary plane is set to an angle within a range from the minimum angle to the maximum angle of the puncture angle of the injection needle.

[0024] With this configuration, even if the injection needle is accidentally inserted into the skin without the extension portion abutting the skin, the injection needle will be tilted at an angle within the range from the minimum angle to the maximum puncture angle when the angle limiting surface formed on the outer bottom of the holding portion abuts against the skin, so that the puncture angle of the injection needle can be prevented from exceeding the allowable range even if the usage procedure is incorrect.

[0025] In the intradermal injection assisting device of the present invention, The lower surface of the protective portion may be a relief surface that is curved upwardly and convexly.

[0026] According to this configuration, the protective portion is less likely to compress the skin, so that the formation of the bulge is not hindered when injecting the injection solution into the dermis (i.e., injection of the injection solution into the dermis is not hindered). Effect of the Invention

[0027] INDUSTRIAL APPLICABILITY As described above, the intradermal injection auxiliary device of the present invention can exhibit the excellent effect of enabling the injection needle to easily and accurately puncture the skin when performing an intradermal injection. [Brief description of the drawings]

[0028] [Figure 1] FIG. 1 is a perspective view of an intradermal injection assisting device according to one embodiment of the present invention. [Diagram 2] FIG. 2 is a plan view of the intradermal injection assisting device according to the embodiment. [Diagram 3] FIG. 3 is a side view of the intradermal injection assisting device according to the embodiment. [Figure 4] FIG. 4 is a longitudinal sectional view of the intradermal injection assisting device according to the embodiment. [Diagram 5] FIG. 5 is an explanatory diagram of the intradermal injection assisting device according to the embodiment in use, where (a) is an explanatory diagram of the state when the extension surface is brought into contact with the skin, and (b) is an explanatory diagram of the state immediately before the injection needle is inserted into the extended skin. [Figure 6] FIG. 6 is an explanatory diagram of the intradermal injection assisting device according to the embodiment in use, in which (a) is an explanatory diagram of the state in which an injection needle is inserted into stretched skin, and (b) is an explanatory diagram of the state in which an injection liquid is being injected into the inside of the dermis. [Figure 7] FIG. 7 is a side view of an intradermal injection assisting device according to another embodiment of the present invention. [Figure 8] FIG. 8 is a vertical sectional view of the intradermal injection assisting device shown in FIG. [Figure 9] FIG. 9 is a side view of an intradermal injection assisting device according to another embodiment of the present invention. [Figure 10]FIG. 10 is a vertical sectional view of the intradermal injection assisting device shown in FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0029] Hereinafter, an intradermal injection auxiliary device according to one embodiment of the present invention will be described with reference to the attached drawings. The intradermal injection auxiliary device according to this embodiment is used when performing intradermal injection. In this embodiment, the direction corresponding to the width of the intradermal injection auxiliary device is called the width direction, the direction corresponding to the height of the intradermal injection auxiliary device is called the height direction, and the direction perpendicular to the width direction and the height direction is called the front-rear direction.

[0030] As shown in FIG. 1, the intradermal injection aid comprises a holding part 3 which holds an injection needle 2, and an extension part 4 which stretches the skin by pressing it against the surface of the skin, the extension part 4 being positioned a predetermined distance from the tip of the injection needle 2 along the center line on an imaginary plane which includes the center line of the injection needle 2 and extends in the width direction, and a connecting arm part 5 which connects the extension part 4 and the holding part 3.

[0031] As shown in FIG. 4, the holding part 3 has a syringe mounting part 30 to which the syringe 6 is attached, a needle mounting part 31 that is provided on the syringe mounting part 30 and to which the injection needle 2 is attached, and a base part 32 (see FIG. 2) that extends around the needle mounting part 31.

[0032] The nozzle 60 of the syringe 6 can be inserted into the syringe attachment part 30. More specifically, the syringe attachment part 30 has a cylindrical nozzle insertion part 300 and a protruding part 301 that protrudes radially outward from the outer surface of the nozzle insertion part 300 on the rear end side in the axial direction.

[0033] The inner circumferential surface of the nozzle insertion portion 300 may be formed in a tapered shape such that the inner diameter gradually decreases from the rear end side to the front end side.

[0034] A plurality of protruding portions 301 are provided at intervals in the circumferential direction (the circumferential direction of the outer circumferential surface of the nozzle insertion portion 300) on the outer circumferential surface of the nozzle insertion portion 300. In this embodiment, two protruding portions 301 are provided on the outer circumferential surface of the nozzle insertion portion 300, but the number of protruding portions 301 may be one or three or more.

[0035] The injection needle attachment part 31 is formed so as to close the opening on the tip side of the syringe attachment part 30. The injection needle attachment part 31 is formed so as to extend from the tip of the syringe attachment part 30, and has a through hole 310 that is continuous from the base end to the tip, and the injection needle 2 is inserted through this through hole 310.

[0036] The through hole 310 is formed to extend in substantially the same direction as the axis of the nozzle insertion part 300. Therefore, the holding part 3 is configured so that the orientation of the syringe 6 attached to the syringe attachment part 30 (the direction in which the axis of the syringe 6 extends) and the injection needle 2 (the direction in which the center line of the injection needle 2 extends) coincide or approximately coincide. In FIG. 4, the center line of the injection needle 2 is indicated by "CL".

[0037] In this embodiment, the through hole 310 is formed at a position shifted downward from the center of the syringe mounting part 30 in the height direction. Therefore, in the height direction, the injection needle 2 is located below the center (center in the radial direction) of the syringe 6 attached to the syringe mounting part 30.

[0038] As shown in FIG. 2, the base portion 32 is formed in a thin plate shape, and extends on both sides of the injection needle attachment portion 31 in the lateral width direction.

[0039] In the holding portion 3 of this embodiment, the tip surface of the base portion 32 and the tip surface of the injection needle attachment portion 31 are continuous, thereby forming a single curved surface 33 that is curved so as to be convex toward the rear side in the front-to-rear direction.

[0040] The extension part 4 is disposed at a position (displaced) a predetermined distance forward from the tip of the injection needle 2 along the center line on an imaginary plane including the center line of the injection needle 2. Therefore, a space is formed between the extension part 4 and the tip of the injection needle 2.

[0041] 4, the extension part 4 has an extension surface 40 that comes into contact with the skin (surface of the epidermis) of the human body, and a bulging part 41 that bulges out from the extension surface 40. In FIG. 4, the plane on which the extension surface 40 extends is indicated by "P1".

[0042] The inclination angle of the extension surface 40 with respect to the imaginary plane is set to an angle within the range from the minimum angle to the maximum angle of the puncture angle of the injection needle 2. The extension surface 40 is formed by the lower surface of the extension part 4 (the lower surface in the height direction).

[0043] The puncture angle refers to an appropriate inclination of the injection needle 2 for allowing the tip of the injection needle 2 to reach the dermis. The inclination angle of the extension surface 40 with respect to the imaginary plane can be set within a range of 1° to 45°, but is preferably set within a range of 5° to 30°, and more preferably within a range of 5° to 15°. In intradermal injection by the Mantoux method, the puncture angle of the injection needle 2 is 5° to 15°, so when the inclination angle of the extension surface 40 with respect to the imaginary plane is set within a range of 5° to 15°, the injection needle 2 can be easily inclined to an angle suitable for intradermal injection by the Mantoux method.

[0044] The bulging portion 41 bulges downward from the extension surface 40. The number of the bulging portion 41 may be multiple or only one.

[0045] 2, the extension section 4 of this embodiment has a slit 42 formed in the center in the width direction, and is divided into two in the width direction. Therefore, the extension section 4 has a pair of pressing sections 43 arranged at an interval in the width direction. In this embodiment, the extension surface 40 is formed by the lower surface of each pressing section 43 (the lower surface in the height direction).

[0046] The connecting arm 5 is formed at a position aligned with the injection needle 2 in the width direction. The connecting arm 5 and the injection needle 2 are aligned at a distance from each other in the width direction. In this embodiment, the connecting arm 5 is provided individually on one side and the other side of the injection needle 2 in the width direction. The connecting arm 5 also serves as a protective part for preventing inadvertent contact between the injection needle 2 and the human body, etc.

[0047] An inner side surface (hereinafter referred to as an inner edge surface) 50 of each connecting arm portion 5 in the width direction is curved so as to be convex outward in the width direction. That is, the inner edge surfaces of each connecting arm portion 5 are curved so as to be convex in mutually opposite directions in the width direction.

[0048] The lower surface of each connecting arm portion 5 forms a relief surface 51 that is curved so as to be convex upward in the height direction (see FIG. 3).

[0049] Here, a description will be given of the pressing portion 43. The pressing portion 43 is provided at the tip of each connecting arm portion 5, as shown in FIG.

[0050] Each pressing portion 43 extends inward in the width direction from the tip of the connecting arm portion 5, and the tips of the pressing portions 43 face each other with a gap therebetween in the width direction.

[0051] A tip surface 430 (a tip surface in the front-rear direction) of each pressing portion 43 is formed straight along the lateral width direction.

[0052] On the other hand, a rear end surface 431 (a rear end surface in the front-rear direction) of each pressing portion 43 is curved so as to gradually curve forward as it approaches the inside in the width direction.

[0053] In this embodiment, the rear end surface 431 of each pressing portion 43, the inner edge surface of each connecting arm portion 5, and the curved surface 33 of the holding portion 3 are connected together to form a single arc-shaped curved surface, thereby forming an area around the tip of the injection needle 2 that extends in a circular shape with the tip as the center.

[0054] The configuration of the intradermal injection assisting tool 1 according to this embodiment is as described above. Next, the usage of the intradermal injection assisting tool 1 will be explained with reference to the attached drawings. As shown in Fig. 5(a), the skin S1 is superimposed on the subcutaneous tissue S2, and the skin S1 further includes the epidermis S10 constituting the outer surface of the skin S1, and the dermis S11 between the epidermis S10 and the subcutaneous tissue S2.

[0055] First, the intradermal injection assisting tool 1 is attached to the syringe 6. As shown in Fig. 4, when the syringe 6 has a luer lock portion 61, the nozzle 60 is press-fitted into the syringe mounting portion 30 while the protruding portion 301 is screwed into the luer lock portion 61. The axial direction of the syringe 6 attached to the syringe mounting portion 30 and the center line of the injection needle 2 extend in the same or approximately the same direction.

[0056] 5(a), the extension surface 40 is brought into contact with the surface of the skin S1 (epidermis S10) in parallel to the surface of the skin S1. Since the extension surface 40 is inclined at an angle within the range of the minimum puncture angle to the maximum puncture angle with respect to the injection needle 2, when the extension surface 40 is brought into contact with the surface of the skin S1, the injection needle 2 is inclined at an angle within the range of the minimum puncture angle to the maximum puncture angle with respect to the surface of the skin S1, and the syringe 6 is also inclined at the same angle or approximately the same angle as the injection needle 2 with respect to the surface of the skin S1.

[0057] Since the extension part 4 is disposed at a predetermined distance from the tip of the injection needle 2, the extension surface 40 abuts against the skin S1 in a region forward of the planned position for puncturing the injection needle 2. In the following description, the region of the skin S1 with which the extension surface 40 abuts is referred to as the pressing region, and the region behind the pressing region including the planned position for puncturing the injection needle 2 is referred to as the rear region.

[0058] Then, while taking care not to shift the stretching surface 40 relative to the skin S1, the intradermal injection assisting tool 1 is advanced together with the syringe 6 along the direction in which the center line of the injection needle 2 extends, so that the stretching surface 40 is pressed into the skin S1.

[0059] 5(b), the pressed area is depressed and the rear area is stretched (extended) forward. The rear area is most deeply depressed at the boundary with the pressed area, but the part behind the boundary with the pressed area bulges due to the elasticity of the skin S1, so that part of the rear area is on the puncture path of the injection needle 2.

[0060] Then, as the intradermal injection assisting tool 1 is continued to be moved, the injection needle 2 pierces the rear region while maintaining the angle, and the tip of the injection needle 2 penetrates the epidermis S10 and reaches the dermis S11, as shown in Fig. 6(a). When the injection liquid in the syringe 6 is injected in this state, the dermis S11 swells, forming a bulging portion S12, as shown in Fig. 6(b).

[0061] Then, the intradermal injection assisting tool 1 is retracted to pull the injection needle 2 out of the skin S1, completing the intradermal injection.

[0062] As described above, according to the intradermal injection aid 1 of this embodiment, the extension surface 40, whose inclination angle with respect to the virtual plane (injection needle 2) is set to an angle within the range from the minimum angle to the maximum angle of the puncture angle, is positioned at a predetermined distance from the tip of the injection needle 2 in a direction along the center line of the injection needle 2. Therefore, simply by moving the extension part 4 forward while pressing the extension surface 40 into the skin S1, the skin S1 between the tip of the injection needle 2 and the extension part 4 is stretched, and the injection needle 2 pierces the skin S1 while maintaining its inclination (inclination with respect to the skin S1).

[0063] In this way, the intradermal injection assisting tool 1 having the above configuration can pierce the skin S1 while keeping the injection needle 2 tilted at an angle within the range of the minimum puncture angle to the maximum puncture angle during the operation sequence of stretching the skin S1. Therefore, the intradermal injection assisting tool 1 can provide the excellent effect of being able to easily and accurately puncture the skin S1 with the injection needle 2 when performing an intradermal injection.

[0064] Furthermore, when the extension surface 40 is brought into contact with the surface of the skin S1, the orientation of the injection needle 2 and the direction in which the injection needle 2 and the extension portion 4 are aligned are aligned in the direction in which the injection needle 2 is inserted into the skin S1. Therefore, by simply moving the intradermal syringe auxiliary tool 1 in a specific direction (i.e., without changing the direction in which the intradermal syringe auxiliary tool 1 is moved), the skin S1 can be stretched and the injection needle 2 can be inserted into the skin S1 at an angle suitable for intradermal injection.

[0065] In this embodiment, when the extension surface 40 is brought into contact with the surface of the skin S1, the orientation of the syringe 6 is also aligned with the direction in which the injection needle 2 is inserted into the skin S1. This makes it easier to maintain the position of the injection needle 2 when the intradermal injection aid 1 is moved while holding the syringe 6 in the hand to push the extension portion 4 into the skin S1.

[0066] Furthermore, an extension portion 4 is provided in front of the injection needle 2, and a pair of connecting arm portions 5 (protective portions) are provided on either side of the injection needle 2, more specifically, on both sides of the injection needle 2 in the imaginary plane and in the width direction. Therefore, the injection needle 2 is surrounded by the extension portion 4 and the pair of connecting arm portions 5, which prevents the injection needle 2 from accidentally coming into contact with the human body, etc., and also prevents the injection needle 2 from piercing the skin S1 in an incorrect posture.

[0067] Furthermore, since a space is formed between the injection needle 2 and the connecting arm portion 5, when the injection liquid is injected into the dermis S11, the formation of the bulge S12, i.e., the injection of the injection liquid into the dermis S11, is less likely to be hindered.

[0068] In addition, since the underside of the connecting arm portion 5 has a relief surface 51 that is curved convexly upward, the underside of the connecting arm portion 5 is less likely to compress the skin, and the formation of the bulge S12 is not hindered when injecting the injection solution into the dermis S11 (i.e., the injection of the injection solution into the dermis S11 is not hindered).

[0069] The intradermal injection auxiliary device of the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit and scope of the present invention.

[0070] Although not specifically mentioned in the above embodiment, the underside of the tip of the holding portion 3 (in this embodiment, a surface formed by the underside of the injection needle mounting portion 31 and the underside of the base portion 32) may be formed so that the inclination angle with respect to the imaginary plane is the minimum angle of the puncture angle.

[0071] In the above embodiment, the syringe attachment portion 30 has been described on the assumption that it is attached to a syringe 6 having a luer lock portion 61, but it is also possible to attach it to a syringe 6 that does not have a luer lock portion 61.

[0072] In the above embodiment, the syringe mounting part 30 is configured to have the protrusion 301 that is screwed into the luer lock part 61, but the present invention is not limited to this configuration. For example, the syringe mounting part 30 does not have to be provided with the protrusion 301. It should be noted that even if the syringe mounting part 30 does not have the protrusion 301, the syringe mounting part 30 can be press-fitted into the nozzle of the syringe 6 having the luer lock part 61.

[0073] In the above embodiment, the through hole 310 of the injection needle attachment part 31 is formed at a position shifted downward from the center in the radial direction of the syringe attachment part 30, but is not limited to this configuration. For example, the through hole 310 of the injection needle attachment part 31 may be formed on a straight line passing through the center in the radial direction of the syringe attachment part 30 and extending in the axial direction (axial direction of the syringe attachment part 30). However, if the through hole 310 is formed at a position shifted downward from the center in the radial direction of the syringe attachment part 30, the injection needle 2 can be positioned close to the skin when the extension surface 40 is abutted against the skin, making it easier to perform intradermal injection.

[0074] Although not specifically mentioned in the above embodiment, the width of the slit 42 of the stretching portion 4 may be set within a range that allows the posterior region of the skin to be stretched.

[0075] In the above embodiment, the extension section 4 is divided into two in the width direction, but it is not necessarily required to be divided.

[0076] Although not specifically mentioned in the above embodiment, as shown in Figures 7 and 8, the underside of the tip end side of the holding part 3 (specifically, the surface formed by the underside of the injection needle mounting part 31 and the underside of the base part 32) may be formed with a deep insertion prevention part 34 that bulges downward below the underside of the rear end side of the holding part 3.

[0077] According to this configuration, the underside of the tip end of the holding part 3 has a deep penetration prevention part 34 that bulges downward from the underside of the rear end, so that when the extension surface 40 is pressed into the skin S1, the operation of pressing the extension surface 40, i.e., the operation of inserting the injection needle 2 into the skin S1, can be stopped when the deep penetration prevention part 34 comes into contact with the skin S1. Therefore, the intradermal injection auxiliary tool 1 configured as above can prevent the injection needle 2 from being inserted excessively into the skin S1.

[0078] The bottom surface of the deep insertion prevention part 34 may include an angle limiting surface 340 whose inclination angle with respect to a virtual plane is set to an angle within the range from the minimum angle to the maximum angle of the puncture angle of the injection needle. In Fig. 8, the center line of the injection needle 2 is indicated by "CL", the plane on which the extension surface 40 extends is indicated by "P1", and the plane on which the angle limiting surface 340 extends is indicated by "P2".

[0079] According to this configuration, even if the injection needle 2 accidentally punctures the skin S1 without the extension portion 4 abutting against the skin S1, the injection needle 2 will be tilted at an angle within the range from the minimum angle to the maximum puncture angle when the angle limiting surface 340 formed on the outer bottom portion of the holding portion 3 abuts against the skin S1, so that even if the usage procedure is incorrect, the puncture angle of the injection needle 2 can be prevented from exceeding the allowable range.

[0080] As shown in Figures 9 and 10, the underside of the deep penetration prevention portion 34 can be aligned or approximately aligned with the direction in which the center line of the injection needle 2 extends. In this case, the effect of preventing the injection needle 2 from being excessively penetrated into the skin S1 is enhanced. [Explanation of symbols]

[0081] 1 ... intradermal injection aid, 2 ... injection needle, 3 ... holding portion, 4 ... extension portion, 5 ... connection arm portion, 6 ... syringe, 30 ... syringe attachment portion, 31 ... injection needle attachment portion, 32 ... base portion, 33 ... curved surface, 34 ... deep insertion prevention portion, 40 ... extension surface, 41 ... bulging portion, 42 ... slit, 43 ... pressing portion, 50 ... inner edge surface, 51 ... relief surface, 60 ... nozzle, 61 ... luer lock portion, 300 ... nozzle insertion portion, 301 ... protruding portion, 310 ... through hole, 340 ... angle limiting surface, S1 ... skin, S10 ... epidermis, S11 ... dermis, S12 ... bulging portion, S2 ... subcutaneous tissue

Claims

1. A holder for holding an injection needle; An extension part that presses against the surface of the skin to extend the skin; a pair of protective parts that are located on an imaginary plane extending in a lateral direction so as to include a center line of the injection needle and that are arranged on both sides of the injection needle in the lateral direction; The pair of protection portions extend forward from the holding portion in a direction along the center line, the injection needle, one of the pair of protective parts, and the other of the pair of protective parts are aligned in a row in the width direction, The extension portion has a pair of pressing portions each provided at a tip end of each of the protective portions, each of the pair of pressing parts is configured to have an extension surface located at a position shifted forward by a predetermined distance from the tip of the injection needle in a direction along the center line when not in contact with the skin; The extension surfaces of the pair of pressing parts are set to have an inclination angle with respect to the virtual plane within a range of 5° to 15°. Aid for intradermal injection.

2. The protection part is disposed at a distance from the injection needle in the lateral width direction. The intradermal injection aid according to claim 1.

3. A deep insertion prevention portion is formed on the lower surface of the tip end side of the holding portion, the deep insertion prevention portion being bulging downward from the lower surface of the rear end side of the holding portion.

3. The intradermal injection aid according to claim 1 or 2.

4. The lower surface of the deep insertion suppression portion includes an angle limiting surface whose inclination angle with respect to the virtual plane is set to an angle within a range of 5° to 15°. The intradermal injection aid according to claim 3.

5. The lower surface of the protective portion is a relief surface that is curved convexly upward.

3. The intradermal injection aid according to claim 1 or 2.

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