JP2019205792A - Intracutaneous injection aid - Google Patents

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

  The present invention relates to an auxiliary device for intradermal injection for assisting intradermal injection.

  Conventionally, various types of auxiliary devices for intradermal injection have been proposed. For example, an auxiliary device for intracutaneous injection (adapter for intradermal injection) disclosed in Patent Document 1 is an adapter main body that is cylindrical and can be inserted and removed from the rear end side, and the adapter main body And a distal portion for extending the skin.

  The adapter main body is configured so that the syringe inserted therein can be slid in the axial direction.

  The distal portion is a skin contact main surface that is pressed against the skin, and has a skin contact main surface that is bent at an obtuse angle. More specifically, the skin contact main surface includes a first skin contact main surface formed so as to block the opening on the distal end side of the adapter main body, and the adapter main body portion from the first skin contact main surface. A flat second skin contact main surface extending forward along the axial direction of the first skin contact main surface, and the first skin contact main surface includes a syringe needle (injected into the adapter body) ( A needle opening through which the puncture needle can be withdrawn and withdrawn is formed.

  When intradermal injection is performed using such an adapter for intradermal injection, a part of the skin is submerged and extended on the first skin contact main surface, and the second skin contact surface is applied to the skin. By making contact, the posture of the adapter main body and the syringe is made horizontal or substantially horizontal with respect to the skin surface (the skin surface with which the second skin contact surface is in contact).

  Then, when the syringe is advanced in the adapter main body, the puncture needle advances from the needle opening to the outside, whereby the puncture needle in a posture that is horizontal or substantially horizontal with respect to the skin surface is stuck into the extended skin.

  Thus, the adapter for intradermal injection is configured to pierce the skin with the puncture needle after extending the skin at the distal portion and determining the direction of the puncture needle.

Japanese Patent No. 5213950

  By the way, in the conventional adapter for intradermal injection, the first skin contact main surface is pressed against the skin to extend the skin, and the second skin contact main surface is brought into contact with the skin, so that the syringe (puncture needle) After the orientation is determined, it is necessary to puncture the skin with the puncture needle while maintaining the state where the first skin contact main surface is pressed against the skin. The adapter may move before the skin is stabbed, and the puncture position and puncture angle of the puncture needle may be shifted.

  In the conventional adapter for intradermal injection, the operation for pressing the first skin contact main surface against the skin, that is, the operation for extending the skin and the operation for inserting the puncture needle into the skin are performed separately. Since it is necessary to carry out, the procedure which performs intradermal injection becomes complicated.

  As described above, in the intradermal injection using the conventional adapter for intradermal injection, it is difficult to accurately puncture the puncture needle into the skin, and the procedure until the puncture needle is inserted into the skin is complicated. Met.

  Then, this invention makes it a subject to provide the auxiliary tool for intradermal injection which can puncture an injection needle easily and correctly with respect to skin when performing intradermal injection in view of this situation.

Auxiliary device for intradermal injection of the present invention,
A holding part for holding the injection needle;
An extension part that presses against the surface of the skin and extends the skin, and includes a center line of the injection needle and extends in a lateral width direction, and extends a predetermined distance from the tip of the injection needle in a direction along the center line. An extending portion disposed at a spaced position;
The extension portion has an extension surface in which an inclination angle with respect to the virtual 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.

  According to the intradermal injection aid of the above configuration, since the inclination angle of the extension surface with respect to the virtual plane is set to an angle within the range of the puncture angle of the injection needle, when the extension surface is brought into contact with the skin, The injection needle is tilted with respect to the skin within the range of the puncture angle.

  Then, when the skin is pushed in with the extension surface while moving the extension part forward, the skin between the tip of the injection needle and the extension part is extended, and the injection needle keeps the inclination (inclination with respect to the skin). Bite.

  As described above, the intradermal injection assist device having the above-described configuration is inserted into the skin while the injection needle is inclined at an angle within the range from the minimum angle to the maximum angle of the puncture angle in the flow of the operation for extending the skin. be able to.

Auxiliary device for intradermal injection of the present invention,
You may provide a pair of protection part arrange | positioned on the said virtual plane, and the both sides of the said injection needle in the said width direction.

  According to such a configuration, since the extension portion is disposed in front of the injection needle on the virtual plane and the protection portions are disposed on both sides of the injection needle, the periphery of the injection needle is surrounded by the extension portion and the protection portion. It is. Therefore, the auxiliary tool for intradermal injection configured as described above can prevent the injection needle from inadvertently coming into contact with the human body or the like, and can prevent the injection needle from being stuck in the skin in an incorrect posture.

Furthermore, in the auxiliary device for intradermal injection of the present invention,
The protective part may be arranged with a space between the injection needle in the lateral width direction.

  In the case of intradermal injection, the surface of the skin partially swells and becomes a bulging portion as the injection solution is injected into the dermis. According to the intradermal injection aid having the above structure, the injection needle and the injection needle Since a space is formed between the extension part and the protection part arranged around, the formation of the bulge part, that is, the injection of the injection solution into the dermis is hardly hindered.

In the auxiliary device for intradermal injection of the present invention,
A deep puncture suppressing portion that bulges further downward than a lower surface on the rear end portion side of the holding portion may be formed on the lower surface on the front end portion side of the holding portion.

  According to such a configuration, since the deep puncture suppressing portion that bulges downward from the lower surface on the rear end portion side is formed on the lower surface on the front end portion side of the holding portion, when pushing the extension surface into the skin, It is possible to stop the operation of pushing the extension surface, that is, the operation of inserting the injection needle into the skin with reference to the deep puncture suppression unit being in contact with the skin. Therefore, the auxiliary tool for intradermal injection having the above-described configuration can prevent the injection needle from being excessively inserted into the skin.

  In this case, the lower surface of the deep puncture suppressing portion includes an angle limiting surface in which an inclination angle with respect to the virtual 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. Also good.

  According to this configuration, even if the injection needle is punctured into the skin without accidentally bringing the extension portion into contact with the skin, the angle limiting surface formed on the outer bottom portion of the holding portion contacts the skin. If it comes in contact, the injection needle tilts at an angle within the range from the minimum angle to the maximum angle of the puncture angle, so the puncture angle of the injection needle is prevented from exceeding the allowable range even if the usage procedure is incorrect. it can.

In the auxiliary device for intradermal injection of the present invention,
The lower surface of the protection part may be a relief surface that curves in a convex shape toward the upper side.

  According to such a configuration, since the skin is not easily pressed by the protective portion, it is possible to prevent the formation of the bulging portion when the injection solution is injected into the dermis (that is, injection of the injection solution into the dermis). Can not be disturbed).

  As described above, the auxiliary device for intradermal injection of the present invention can provide an excellent effect that an injection needle can be punctured easily and accurately into the skin when performing intradermal injection.

FIG. 1 is a perspective view of an intradermal injection aid according to an embodiment of the present invention. FIG. 2 is a plan view of the auxiliary tool for intradermal injection according to the embodiment. FIG. 3 is a side view of the auxiliary device for intradermal injection according to the embodiment. FIG. 4 is a longitudinal sectional view of the auxiliary device for intradermal injection according to the embodiment. FIG. 5 is an explanatory view of the use state of the auxiliary device for intradermal injection according to the embodiment, wherein (a) is an explanatory view when the extended surface is brought into contact with the skin, and (b) is extended. It is explanatory drawing just before an injection needle pierces the skin. FIG. 6 is an explanatory view of the use state of the auxiliary tool for intradermal injection according to the embodiment, wherein (a) is an explanatory view of a state where an injection needle is inserted into the extended skin, and (b) It is explanatory drawing of the state which has injected the injection solution inside the dermis. FIG. 7 is a side view of an auxiliary device for intradermal injection according to another embodiment of the present invention. 8 is a longitudinal sectional view of the auxiliary device for intradermal injection shown in FIG. FIG. 9 is a side view of an auxiliary device for intradermal injection according to another embodiment of the present invention. 10 is a longitudinal sectional view of the auxiliary device for intradermal injection shown in FIG.

  Hereinafter, an auxiliary tool for intradermal injection according to an embodiment of the present invention will be described with reference to the accompanying drawings. The auxiliary device for intradermal injection according to this embodiment is used when performing intradermal injection. In this embodiment, the direction corresponding to the lateral width of the intradermal injection assisting device is the lateral width direction, the direction corresponding to the height of the intradermal injection assisting device is the height direction, and the lateral width direction and the height direction are orthogonal to each other. The direction to do is called the front-back direction.

  As shown in FIG. 1, the auxiliary device for intradermal injection includes a holding portion 3 for holding the injection needle 2 and an extension portion 4 for extending the skin by pressing against the surface of the skin, and the center of the injection needle 2 An extension part 4 arranged so as to be separated from the distal end of the injection needle 2 along the center line by a predetermined distance on a virtual plane including a line and extending in the lateral width direction, the extension part 4 and the holding part 3 and a connecting arm portion 5 for connecting the three.

  As shown in FIG. 4, the holding part 3 includes a syringe attachment part 30 to which the syringe 6 is attached, a syringe needle attachment part 31 that is provided in the syringe attachment part 30 and to which the injection needle 2 is attached, and a syringe needle. And a base portion 32 (see FIG. 2) extending around the mounting portion 31 for use.

  The nozzle 60 of the syringe 6 can be inserted into the mounting portion 30 for the syringe. More specifically, the syringe attachment portion 30 includes a cylindrical nozzle insertion portion 300, and a protrusion 301 protruding radially outward from the outer surface on the rear end side in the axial direction of the nozzle insertion portion 300. Have.

  The inner peripheral surface of the nozzle insertion portion 300 may be formed in a tapered shape so that the inner diameter gradually decreases from the rear end side to the front end side.

  A plurality of protrusions 301 are provided with a gap in the circumferential direction (the circumferential direction of the outer circumferential surface of the nozzle insertion portion 300) with respect to the outer circumferential surface of the nozzle insertion portion 300. In the present embodiment, the two protrusions 301 are provided on the outer peripheral surface of the nozzle insertion part 300, but the number of the protrusions 301 may be one or three or more.

  The attachment part 31 for injection needles is formed so that the opening of the front end side of the attachment part 30 for syringes may be plugged up. The injection needle attachment portion 31 is formed so as to extend from the distal end of the syringe attachment portion 30, and a through-hole 310 continuous from the proximal end to the distal end is formed. In contrast, the injection needle 2 is inserted.

  The through hole 310 is formed to extend along substantially the same direction as the direction in which the axis of the nozzle insertion portion 300 extends. Therefore, in the holding part 3, the direction 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) match or substantially match. Is configured to do. In FIG. 4, the center line of the injection needle 2 is indicated by “CL”.

  In the present embodiment, the through-hole 310 is formed at a position shifted downward from the center of the syringe mounting portion 30 in the height direction. Therefore, in the height direction, the injection needle 2 is positioned below the center (the center in the radial direction) of the syringe 6 attached to the syringe attachment portion 30.

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

  In the holding portion 3 according to the present embodiment, the distal end surface of the base portion 32 and the distal end surface of the injection needle mounting portion 31 are continuous, and thereby bend so as to protrude rearward in the front-rear direction. One curved surface 33 is formed.

  The extending portion 4 is disposed on a virtual plane including the center line of the injection needle 2 at a position (a position shifted) away from the tip of the injection needle 2 by a predetermined distance along the center line. Therefore, a space is formed between the extension portion 4 and the tip of the injection needle 2.

  Further, as shown in FIG. 4, the extended portion 4 has an extended surface 40 that comes into contact with the human skin (the surface of the epidermis) and a bulged portion 41 that bulges from the extended surface 40. In FIG. 4, the plane on which the extended surface 40 extends is indicated by “P1”.

  The extending surface 40 has an inclination angle with respect to the virtual plane set to an angle within a range from a minimum angle to a maximum angle of the puncture angle of the injection needle 2. The extended surface 40 is configured by the lower surface of the extended portion 4 (the lower surface in the height direction).

  The puncture angle is a preferable inclination of the injection needle 2 when the tip of the injection needle 2 reaches the dermis. The inclination angle of the extended surface 40 with respect to the virtual plane can be set within the range of 1 ° to 45 °, but is preferably set within the range of 5 ° to 30 °, and within the range of 5 ° to 15 °. More preferably, it is set. In addition, in the intradermal injection by the Manto method, the puncture angle of the injection needle 2 is 5 ° to 15 °, and therefore the inclination angle of the extension surface 40 with respect to the virtual plane is set within the range of 5 ° to 15 °. Makes it easier to tilt the injection needle 2 to an angle suitable for intradermal injection by the Manto method.

  The bulging portion 41 bulges downward from the extended surface 40. In addition, the number of the bulging parts 41 may be plural or only one.

  As shown in FIG. 2, the extension part 4 of this embodiment is formed with a slit 42 at the center in the lateral width direction and is divided into two in the lateral width direction. Therefore, the extension part 4 has a pair of pressing parts 43 arranged at intervals in the lateral width direction. Moreover, in this embodiment, the extended surface 40 is comprised by the lower surface (lower surface in the said height direction) of each press part 43. As shown in FIG.

  The connection arm portion 5 is formed at a position aligned with the injection needle 2 in the lateral width direction. Further, the connecting arm portion 5 and the injection needle 2 are arranged at a distance from each other in the lateral width direction. In the present embodiment, such connection arm portions 5 are individually provided on one side and the other side of the injection needle 2 in the lateral width direction. The connection arm portion 5 is also a protection portion for preventing inadvertent contact between the injection needle 2 and a human body or the like.

  An inner side surface (hereinafter referred to as an inner edge surface) 50 in the lateral width direction of each connection arm portion 5 is curved so as to protrude outward in the lateral width direction. That is, the inner edge surface of each connection arm part 5 is curving so that it may become convex toward the mutually opposite direction in the said width direction.

  The lower surface of each connection arm portion 5 is a relief surface 51 that is curved so as to protrude upward in the height direction (see FIG. 3).

  Here, the pressing part 43 will be described. As shown in FIG. 2, the pressing portion 43 is individually provided at the tip of each connection arm portion 5.

  Each pressing portion 43 extends from the distal end of the connection arm portion 5 toward the inner side in the lateral width direction, and the distal end portions of the pressing portions 43 face each other with an interval in the lateral width direction.

  The front end surface 430 (the front end surface in the front-rear direction) of each pressing portion 43 is formed straight along the lateral width direction.

  On the other hand, the rear end surface 431 (the rear end surface in the front-rear direction) of each pressing portion 43 is curved to gradually move forward as it goes inward in the lateral width direction.

  In the present 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 continuously formed into one arcuate curved surface. Around the distal end portion of the injection needle 2, a region that extends in a circular shape around the distal end portion is formed.

  The configuration of the auxiliary tool 1 for intradermal injection according to the present embodiment is as described above. Next, how to use the auxiliary device 1 for intradermal injection will be described with reference to the accompanying drawings. As shown in FIG. 5A, the skin S1 is overlaid on the subcutaneous tissue S2. Further, the skin S1 includes an epidermis S10 that constitutes the outer surface of the skin S1, an epidermis S10, and the subcutaneous tissue S2. And dermis S11 in between.

  First, the intradermal injection aid 1 is attached to the syringe 6. As shown in FIG. 4, when the syringe 6 has the 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 attachment portion 30 and the center line of the injection needle 2 extend along the same or substantially the same direction.

  Subsequently, as shown in FIG. 5A, the extension surface 40 is brought into contact with the surface of the skin S1 (skin S10) in parallel. Since the extension surface 40 is inclined with respect to the injection needle 2 at an angle within the range from the minimum puncture angle to the maximum angle, when the extension surface 40 is brought into contact with the surface of the skin S1, the injection needle 2 The syringe 6 is also inclined with respect to the surface of the skin S1 at an angle within a range from the minimum angle to the maximum angle of the puncture angle, and the syringe 6 is also inclined with respect to the surface of the skin S1 at the same angle or substantially the same angle. .

  Since the extension part 4 is arranged so as to be separated from the tip of the injection needle 2 by a predetermined distance, the extension surface 40 contacts the skin S1 in a region in front of the position where the injection needle 2 is punctured. In the following description, in the skin S1, a region where the extension surface 40 abuts is referred to as a pressing region, and a region behind the pressing region including a planned position where the injection needle 2 is punctured is referred to as a rear region.

  Then, while preventing the stretched surface 40 from shifting relative to the skin S1, the intradermal injection aid 1 is advanced along with the syringe 6 along the direction in which the center line of the injection needle 2 extends, so that the stretched surface 40 is brought into the skin S1. Push in.

  If it does in this way, as shown in Drawing 5 (b), while a press field will be dented, a back field will be extended ahead (extend). In addition, the rear region sinks deepest at the boundary with the pressing region, but the portion behind the boundary with the pressing region swells due to the elasticity of the skin S1, so that it is on the puncture path of the injection needle 2. Part of the rear region is approaching.

  When the intradermal injection aid 1 is continuously moved, the injection needle 2 is stuck in the rear region while maintaining the angle, and the tip of the injection needle 2 penetrates the epidermis S10 as shown in FIG. 6 (a). To reach the dermis S11. When the injection solution in the syringe 6 is injected in this state, as shown in FIG. 6B, the dermis S11 swells to form a bulging portion S12.

  Then, the auxiliary tool 1 for intradermal injection is retracted and the injection needle 2 is pulled out from the skin S1, and the intradermal injection is completed.

  As described above, according to the intracutaneous injection assisting device 1 according to the present embodiment, the 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. Since the extending surface 40 is arranged at a position away from the tip of the injection needle 2 by a predetermined distance in the direction along the center line of the injection needle 2, the extension portion 4 is pushed while pushing the extension surface 40 into the skin S1. By simply moving forward, the skin S1 between the tip of the injection needle 2 and the extension portion 4 is extended, and the injection needle 2 is stuck into the skin S1 while maintaining the inclination (inclination relative to the skin S1).

  In this way, the intracutaneous injection assisting device 1 having the above-described configuration keeps the injection needle 2 tilted at an angle within the range from the minimum angle to the maximum angle of the puncture angle in the flow of the operation of extending the skin S1. The skin S1 can be stabbed. Therefore, the auxiliary device 1 for intradermal injection can exhibit an excellent effect that the injection needle 2 can be punctured easily and accurately into the skin S1 when performing intradermal injection.

  Further, when the extension surface 40 is brought into contact with the surface of the skin S1, the direction of the injection needle 2 and the direction in which the injection needle 2 and the extension portion 4 are aligned are aligned with the direction in which the injection needle 2 is inserted into the skin S1. The skin S1 is extended only by moving the intradermal syringe auxiliary tool 1 in a predetermined direction (that is, without changing the direction in which the intradermal syringe auxiliary tool 1 is moved), and the injection needle 2 is applied to the skin S1. Can be stabbed at an angle suitable for intradermal injection.

  In the present embodiment, when the extension surface 40 is brought into contact with the surface of the skin S1, the direction of the syringe 6 is aligned with the direction in which the injection needle 2 is inserted into the skin S1, so that the syringe 6 is held in the hand. When the intradermal injection aid 1 is moved and the extension portion 4 is pushed into the skin S1, the posture of the injection needle 2 can be easily maintained.

  Further, an extension portion 4 is provided in front of the injection needle 2, and a pair of connection arm portions 5 are provided on both sides of the injection needle 2, more specifically, on a virtual plane and on both sides of the injection needle 2 in the lateral width direction. Since the (protection part) is provided, the periphery of the injection needle 2 is surrounded by the extension part 4 and the pair of connection arm parts 5, and the injection needle 2 can be prevented from inadvertently contacting a human body or the like. Moreover, it is possible to prevent the injection needle 2 from being stuck in the skin S1 in an incorrect posture.

  Further, since a space is formed between the injection needle 2 and the connection arm portion 5, when the injection solution is injected into the dermis S11, formation of the bulging portion S12, that is, the injection solution to the dermis S11 is formed. Injection is less likely to be hindered.

  Further, since the lower surface of the connection arm portion 5 is a relief surface 51 that is convexly curved upward, the skin is less likely to be pressed by the lower surface of the connection arm portion 5, and an injection solution is injected into the dermis S11. It is possible to prevent the formation of the bulging portion S12 during the injection (that is, it is possible to prevent the injection solution from being injected into the dermis S11).

  In addition, the auxiliary tool for intradermal injection of this invention is not limited to the said embodiment, Of course, a various change can be added in the range which does not deviate from the summary of this invention.

  Although not particularly mentioned in the above embodiment, the lower surface on the distal end side of the holding portion 3 (in this embodiment, one surface composed of the lower surface of the injection needle mounting portion 31 and the lower surface of the base portion 32) is assumed to be virtual. The inclination angle with respect to the plane may be formed to be the minimum angle of the puncture angle.

  In the above-described embodiment, the syringe mounting portion 30 has been described on the assumption that the syringe mounting portion 30 is mounted on the syringe 6 having the luer lock portion 61. However, the syringe mounting portion 30 may be mounted on the syringe 6 that does not have the luer lock portion 61.

  In the above-described embodiment, the syringe attachment portion 30 is configured to have the protruding portion 301 that is screwed into the luer lock portion 61, but is not limited to this configuration. For example, the protruding portion 301 may not be provided on the syringe mounting portion 30. In addition, even if it is the syringe attachment part 30 which does not have the protrusion part 301, it is possible to press-fit the syringe attachment part 30 of this syringe attachment part 30 with respect to the nozzle of the syringe 6 which has the luer lock part 61. is there.

  In the above embodiment, the through-hole 310 of the injection needle attachment portion 31 is formed at a position shifted downward from the center of the syringe attachment portion 30 in the radial direction, but is not limited to this configuration. For example, the through hole 310 of the injection needle attachment portion 31 may be formed on a straight line that extends in the axial direction (the axial direction of the injection attachment portion 30) through the center of the syringe attachment portion 30 in the radial direction. . However, when the through-hole 310 is formed at a position shifted downward from the center in the radial direction of the syringe attachment portion 30, the injection needle 2 is attached to the skin when the extension surface 40 is brought into contact with the skin. Intradermal injection is facilitated because it can be placed nearby.

  Although not specifically mentioned in the above embodiment, the width of the slit 42 of the extension portion 4 only needs to be set within a range in which the rear region of the skin can be extended.

  In the said embodiment, although the extension part 4 was divided into two by the said horizontal width direction, it is not necessarily required to be divided.

  Although not particularly mentioned in the above embodiment, as shown in FIG. 7 and FIG. 8, the lower surface of the holding portion 3 on the distal end side (specifically, the lower surface of the injection needle mounting portion 31 and the base portion 32). On one surface composed of the lower surface, a deep puncture suppressing portion 34 that bulges downward from the lower surface on the rear end side of the holding portion 3 may be formed.

  According to this configuration, since the deep puncture suppressing portion 34 that bulges downward from the lower surface on the rear end portion side is formed on the lower surface on the front end portion side of the holding portion 3, the extension surface 40 is formed on the skin S1. When pushing, the operation of pushing the extension surface 40, that is, the operation of putting the injection needle 2 into the skin S1, can be stopped based on the fact that the deep puncture suppressing portion 34 is in contact with the skin S1. Therefore, the auxiliary device for intradermal injection 1 having the above-described configuration can suppress the injection needle 2 from being excessively inserted into the skin S1.

  Further, the lower surface of the deep puncture suppressing unit 34 includes an angle limiting surface 340 in which an inclination angle with respect to a virtual 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. Also good. 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”.

  According to such a configuration, even if the injection needle 2 is punctured into the skin S1 without causing the extension portion 4 to contact the skin S1, the angle limit formed on the outer bottom portion of the holding portion 3 is limited. If the surface 340 comes into contact with the skin S1, the injection needle 2 tilts at an angle within the range from the minimum angle to the maximum angle of the puncture angle. Exceeding the allowable range can be suppressed.

  As shown in FIGS. 9 and 10, it is possible to make the lower surface of the deep puncture suppressing portion 34 coincide with or substantially coincide with the direction in which the center line of the injection needle 2 extends. The effect which can suppress that it stabs excessively with respect to skin S1 increases.

DESCRIPTION OF SYMBOLS 1 ... Intradermal injection aid, 2 ... Injection needle, 3 ... Holding part, 4 ... Extension part, 5 ... Connection arm part, 6 ... Syringe, 30 ... Syringe attachment part, 31 ... Injection needle attachment part, 32 DESCRIPTION OF SYMBOLS ... Base part, 33 ... Curved surface, 34 ... Deep penetration suppression part, 40 ... Extension surface, 41 ... Swelling part, 42 ... Slit, 43 ... Press part, 50 ... Inner edge surface, 51 ... Relief surface, 60 ... Nozzle, 61 ... Luer lock part, 300 ... Nozzle insertion part, 301 ... Projection part, 310 ... Through hole, 340 ... Angle limiting surface, S1 ... Skin, S10 ... Epidermis, S11 ... Dermis, S12 ... Swelling part, S2 ... Subcutaneous tissue

Claims (6)

A holding part for holding the injection needle;
An extension part that presses against the surface of the skin and extends the skin, and includes a center line of the injection needle and extends in a lateral width direction, and extends a predetermined distance from the tip of the injection needle in a direction along the center line. An extending portion disposed at a spaced position;
The extension portion has an extension surface in which an inclination angle with respect to the virtual 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.
Auxiliary device for intradermal injection. A pair of protection parts disposed on both sides of the injection needle on the virtual plane and in the lateral width direction;
The auxiliary tool for intradermal injection according to claim 1. The protective part is arranged with a space between the injection needle in the lateral width direction,
The auxiliary tool for intradermal injection according to claim 2. On the lower surface on the distal end side of the holding portion, a deep puncture suppressing portion that bulges downward from the lower surface on the rear end portion side of the holding portion is formed.
The auxiliary device for intradermal injection according to any one of claims 1 to 3. The lower surface of the deep puncture suppressing portion includes an angle limiting surface in which an inclination angle with respect to the virtual 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.
The auxiliary tool for intradermal injection according to claim 4. The lower surface of the protective portion is a relief surface that curves in a convex shape toward the upper side,
The auxiliary tool for intradermal injection according to claim 2 or 3.

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