JP2011045537A - Auxiliary tool for insertion device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an auxiliary tool for an insertion device removed easily from the insertion device after inserting a cannula. <P>SOLUTION: This auxiliary tool for the insertion device includes a body 100, a coil spring 200 attached to the body 100, and a plunger 300 provided vertically movably with respect to the body 100, and energized downwards together with the insertion device 600, by an energizing force of the coil spring 200. A trigger 130 in the body 100 includes an engagement protrusion 130A engageable with an outer cylinder 620 of the insertion device 600. The downward movement of the plunger 300 and the insertion device 600 is regulated by supporting the plunger 300 upwards against the energizing force of the coil spring 200 by the insertion device 600, before inserting the cannula 710. On the other hand, engagement between the engagement protrusion 130A and an engagement hole 620A is released, when inserting the cannula 710, to move downwards the plunger 300 and the insertion device 600 energized with the energizing force of the coil spring 200. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an auxiliary device for an insertion device, and more particularly to an auxiliary device for an insertion device for inserting a cannula in an indwelling member of a hypodermic syringe into a wearer's body.

  2. Description of the Related Art Conventionally, a subcutaneous injector for injecting a drug solution into a wearer's body is known. As a general example of a hypodermic injector, an indwelling member is placed on the body surface of the wearer so that a cannula is inserted into the wearer's body.

  As an auxiliary instrument for automatically inserting the cannula of the indwelling member as described above into the body of the wearer, for example, the one described in JP-T-2003-527138 (Patent Document 1) has been conventionally known. .

Special table 2003-527138 gazette

  In the device described in Patent Document 1, the carrier body includes a receiving structure that supports the insertion set in a correct position. After a part (cannula) of the insertion set is inserted through the patient's skin, the insertion set is inserted. The carrier body is to be removed from the carrier (see [Claim 1] of the document). However, it is not always easy to remove the carrier body after inserting the cannula.

  The present invention has been made in view of the above problems, and an object of the present invention is to insert a cannula in an indwelling member of a hypodermic syringe into a wearer's body after inserting the cannula. An object of the present invention is to provide an auxiliary device for an insertion device that is easy to remove.

  The auxiliary device for an insertion device according to the present invention is an auxiliary device for an insertion device for inserting a cannula in an indwelling member of a hypodermic syringe into a wearer's body. More specifically, the auxiliary instrument is for assisting automatic insertion of a cannula.

  In one embodiment, the auxiliary device is provided with a main body, an urging member attached to the main body, and movable in the vertical direction with respect to the main body, and downward with the insertion device by the urging force of the urging member. And a biased plunger.

  In the present specification, “upward” refers to the direction away from the body surface of the wearer, “downward” refers to the direction approaching the body surface of the wearer, and “vertical direction” refers to the body surface of the wearer. Means a direction substantially perpendicular to.

  In the auxiliary instrument, an engaging portion is provided between the main body and the insertion device. Before the cannula is inserted, the insertion device supports the plunger in the upward direction against the urging force of the urging member, thereby restricting the downward movement of the plunger and the insertion device. On the other hand, when the cannula is inserted, the engagement of the engaging portion is released, and the plunger and the insertion device biased by the biasing force of the biasing member move downward.

  “The insertion device supports the plunger upwardly against the urging force of the urging member” means that the insertion device directly supports the plunger and the insertion device is another member such as an indwelling member. And indirectly supporting the plunger.

  According to the above configuration, the cannula can be automatically inserted by moving the plunger and the insertion device biased by the biasing force of the biasing member downward. On the other hand, before the cannula is inserted, since the insertion device supports the plunger in the upward direction against the urging force of the urging member, the plunger does not need to support the insertion device. Therefore, it is not necessary to provide the plunger with a structure for supporting the insertion device, and the plunger and the insertion device can be easily separated after the cannula is inserted. That is, an auxiliary device for an insertion device that can be easily removed from the insertion device after insertion of the cannula is obtained.

  In one specific example, the insertion device includes a puncture needle that is inserted into a cannula, an outer cylinder that holds the puncture needle, and an inner cylinder that is inserted into the outer cylinder so as to be coaxial with the outer cylinder. Including. A hole is formed in the side surface of the outer cylinder. On the other hand, the main body includes a protrusion that can be engaged with the hole. An engaging portion is formed by the projection and the hole, and the insertion device supports the plunger upward against the urging force of the urging member before the cannula is inserted.

  In another specific example, the indwelling member includes a base portion fixed to the wearer's body surface and a protruding portion protruding upward from the base portion, and a recess is formed between the base portion and the protruding portion. The insertion device includes a first protrusion that can be engaged with the recess, and a second protrusion that is different from the first protrusion, and the main body includes a third protrusion that can be engaged with the second protrusion. The engaging portion is formed by the second projecting portion and the third projecting portion, and before the cannula is inserted, the insertion device supports the plunger upwardly against the urging force of the urging member via the indwelling member. To do.

  The scope of the present invention is not limited to the specific examples described above, and should be understood as being included in the scope of the present invention as long as the plunger does not directly support the insertion device before insertion of the cannula. . For example, as a further modification, before the cannula is inserted, the outer cylinder of the insertion device slightly deforms the inner cylinder to the inner peripheral side, the inner cylinder and the indwelling member are engaged, and the insertion device is inserted into the plunger via the indwelling member. The example which supports is upward.

  ADVANTAGE OF THE INVENTION According to this invention, it is an auxiliary device for insertion apparatuses for inserting the cannula in the indwelling member of a hypodermic syringe into a wearer's body, Comprising: The thing which is easy to remove from an insertion apparatus after insertion of a cannula can be provided.

It is a disassembled perspective view (the 1) of the auxiliary tool for insertion devices concerning Embodiment 1 of the present invention. It is a disassembled perspective view (the 2) of the auxiliary tool for insertion devices which concerns on Embodiment 1 of this invention. It is sectional drawing (the 1) which shows the 1st step of the insertion operation using the auxiliary tool for insertion devices which concerns on Embodiment 1 of this invention. It is sectional drawing (the 2) which shows the 1st step of the insertion operation using the auxiliary tool for insertion devices which concerns on Embodiment 1 of this invention. It is sectional drawing (the 1) which shows the 2nd step of insertion operation using the auxiliary tool for insertion devices which concerns on Embodiment 1 of this invention. It is sectional drawing (the 2) which shows the 2nd step of the insertion operation | movement using the auxiliary tool for insertion devices which concerns on Embodiment 1 of this invention. It is sectional drawing (the 1) which shows the 3rd step of insertion operation using the auxiliary tool for insertion devices which concerns on Embodiment 1 of this invention. It is sectional drawing (the 2) which shows the 3rd step of insertion operation using the auxiliary tool for insertion devices which concerns on Embodiment 1 of this invention. It is sectional drawing (the 1) which shows the 4th step of the insertion operation | movement using the auxiliary tool for insertion devices which concerns on Embodiment 1 of this invention. It is sectional drawing (the 2) which shows the 4th step of insertion operation using the auxiliary tool for insertion devices which concerns on Embodiment 1 of this invention. It is sectional drawing (the 1) which shows the 5th step of insertion operation using the auxiliary tool for insertion devices which concerns on Embodiment 1 of this invention. It is sectional drawing (the 2) which shows the 5th step of insertion operation using the auxiliary tool for insertion devices which concerns on Embodiment 1 of this invention. It is sectional drawing (the 1) which shows the 6th step of the insertion operation | movement using the auxiliary tool for insertion devices which concerns on Embodiment 1 of this invention. It is sectional drawing (the 2) which shows the 6th step of the insertion operation | movement using the auxiliary tool for insertion devices which concerns on Embodiment 1 of this invention. It is sectional drawing (the 1) which shows the 7th step of the insertion operation | movement using the auxiliary tool for insertion devices which concerns on Embodiment 1 of this invention. It is sectional drawing (the 2) which shows the 7th step of the insertion operation | movement using the auxiliary tool for insertion devices which concerns on Embodiment 1 of this invention. It is sectional drawing (the 1) which shows the 8th step of the insertion operation | movement using the auxiliary tool for insertion devices which concerns on Embodiment 1 of this invention. It is sectional drawing (the 2) which shows the 8th step of the insertion operation | movement using the auxiliary tool for insertion devices which concerns on Embodiment 1 of this invention. It is a side view of the insertion apparatus (state which hold | maintained the indwelling member) set to the auxiliary tool for insertion apparatuses which concerns on Embodiment 1 of this invention. It is a perspective view (the 1) which shows the state which set the insertion apparatus to the auxiliary tool for insertion apparatuses which concerns on Embodiment 2 of this invention. It is a perspective view (the 2) which shows the state which set the insertion apparatus to the auxiliary tool for insertion apparatuses which concerns on Embodiment 2 of this invention. It is sectional drawing (the 1) which shows the state which set the insertion apparatus to the auxiliary tool for insertion apparatuses which concerns on Embodiment 2 of this invention. It is sectional drawing (the 2) which shows the state which set the insertion apparatus to the auxiliary tool for insertion apparatuses which concerns on Embodiment 2 of this invention.

  Embodiments of the present invention will be described below. Note that the same or corresponding portions are denoted by the same reference numerals, and the description thereof may not be repeated.

  Note that in the embodiments described below, when referring to the number, amount, and the like, the scope of the present invention is not necessarily limited to the number, amount, and the like unless otherwise specified. In the following embodiments, each component is not necessarily essential for the present invention unless otherwise specified.

  Moreover, combining the structure of Embodiment 1, 2 mentioned later suitably is planned from the beginning.

(Embodiment 1)
FIG. 1 is an exploded perspective view of an insertion device auxiliary instrument according to Embodiment 1. FIG. Referring to FIGS. 1 and 2, the auxiliary instrument according to the present embodiment includes a main body 100, coil springs 200 and 500, and a plunger 300.

  The main body 100 includes an upper lid 110, a cylindrical body 120, and a trigger 130. As shown in FIG. 2, the upper lid 110 has a vertical hole 110 </ b> A that accommodates the upper end portion of the coil spring 200. The cylinder 120 is combined with the upper lid 110. The trigger 130 is fixed to the upper lid 110 and the cylinder 120 together with the coil spring 500 so as to be rotatable. The trigger 130 has an engagement protrusion 130A that can be engaged with an engagement hole 620A provided in an outer cylinder 620 of the insertion device 600 described later. As will be described later, the downward movement of the plunger 300 is started by releasing the engagement of the engagement protrusion 130A.

  The coil spring 200 urges the plunger 300 downward. The indwelling member is automatically inserted by the biasing force of the coil spring 200. The both ends of the coil spring 200 are held by the vertical hole 110 </ b> A of the upper lid 110 and the protrusion 310 of the plunger 300. That is, the upper end portion of the coil spring 200 is accommodated in the vertical hole 110 </ b> A, and the lower end portion of the coil spring 200 is fitted on the protrusion 310.

  As shown in FIG. 2, a recess 320 is formed on the inner peripheral surface of the plunger 300. The insertion device 600 can support the plunger 300 in the upward direction by fitting a part of an outer cylinder 620 of the insertion device 600 described later (a projection 640 shown in FIG. 19) into the recess 320.

  Below, a series of operation | movement of the indwelling member insertion using the auxiliary instrument shown in FIG. 1, FIG. 2 is divided into 1st to 8th steps, and is demonstrated.

[First stage]
3 and 4 are cross-sectional views showing a first stage of an insertion operation using the insertion device auxiliary tool according to the present embodiment. 3 and 4 show cross sections at positions shifted by 90 degrees in the circumferential direction (this also applies to FIGS. 5 to 18 described later).

  Referring to FIGS. 3 and 4, an insertion device 600 holding an indwelling member 700 is prepared. The insertion device 600 includes a puncture needle 610, an outer cylinder 620, and an inner cylinder 630. The insertion device 600 is for inserting the indwelling member 700 constituting the subcutaneous injector into the body of the wearer.

  The indwelling member 700 constitutes a hypodermic injector used for continuous insulin infusion (CSII), and includes a cannula 710, a protrusion 720, and a base 730. The cannula 710 is a portion that is inserted into the wearer's body. The protruding portion 720 is a portion protruding upward with respect to the base portion 730, and the chemical solution is supplied to the cannula 710 by connecting the chemical solution supply portion to the protruding portion 720. The base portion 730 is a portion that is attached to the body surface of the wearer, and the back surface (the lower surface in FIGS. 3 and 4) is used to fix the base portion 730 to the skin of the patient (wearer). The adhesive layer is provided.

  The subcutaneous injector can also be applied to a use for supplying a medical solution other than insulin into the body (for example, pain treatment).

  The puncture needle 610 in the insertion device 600 is a metal needle and serves as a core material when the cannula 710 is inserted into the wearer's body. The outer cylinder 620 holds a puncture needle 610. The inner cylinder 630 is disposed coaxially with the outer cylinder 620. The outer cylinder 620 and the inner cylinder 630 are relatively movable along the axial direction.

  An inner engagement portion 630 </ b> A that engages with the indwelling member 700 and an outer engagement portion 630 </ b> B that engages with the outer tube 620 are formed at the distal end of the inner tube 630. By forming the inner engagement portion 630A and the outer engagement portion 630B, the indwelling member 700 and the outer tube 620 can be moved upward together with the inner tube 630.

[Second stage]
5 and 6 are cross-sectional views showing a second stage of the insertion operation using the insertion device auxiliary tool according to the present embodiment.

  Referring to FIGS. 5 and 6, the insertion device 600 holding the indwelling member 700 is inserted into the auxiliary instrument. The insertion device 600 and the indwelling member 700 are inserted into the main body 100 from the lower side of the main body 100 (the side opposite to the upper lid 110 with respect to the cylinder 120).

[Stage 3]
7 and 8 are cross-sectional views showing a third stage of the insertion operation using the insertion device auxiliary tool according to the present embodiment.

  With reference to FIGS. 7 and 8, the insertion device 600 and the indwelling member 700 inserted into the main body 100 are pushed up against the biasing force of the coil spring 200. The urging force of the coil spring 200 acts on the insertion device 600 and the detention member 700. The insertion device 600 and the detention member 700 are pushed up until the engagement protrusion 130A of the trigger 130 engages with the engagement hole 620A of the outer cylinder 620. Thus, the plunger 300, the insertion device 600, and the indwelling member 700 are held at a position where the coil spring 200 is compressed. That is, the outer cylinder 320 of the insertion device 600 is held by the main body 100 via the engaging protrusion 130A, and a part of the outer cylinder 620 (the convex portion 640 shown in FIG. 19) is formed in the concave portion 320 (see FIG. 2). The plunger 300 is also supported upward by fitting.

[Fourth stage]
9 and 10 are cross-sectional views showing a fourth stage of the insertion operation using the insertion device auxiliary instrument according to the present embodiment.

  Referring to FIGS. 9 and 10, the engagement between the engagement protrusion 130 </ b> A and the outer cylinder 620 is released by pressing the upper end portion of the trigger 130 in the direction of the arrow DR 130. The trigger 130 is biased in a direction in which the engagement protrusion 130 </ b> A is engaged with the outer cylinder 620 by the biasing force of the coil spring 500. Thereby, the engagement state between the trigger 130 and the outer cylinder 620 is ensured. The operation of rotating the upper end of the trigger 130 in the direction of the arrow DR 130 is performed against the biasing force of the coil spring 500.

[Fifth stage]
11 and 12 are cross-sectional views showing a fifth stage of the insertion operation using the insertion device auxiliary tool according to the present embodiment.

  Referring to FIGS. 11 and 12, insertion device 600 and indwelling member 700 are urged downward by the urging force of coil spring 200. As a result, together with the puncture needle 610 of the insertion device 600, the cannula 710 of the indwelling member 700 penetrates the wearer's skin and is inserted into the body. Further, the back surface of the base portion 730 of the indwelling member 700 comes into contact with the body surface of the wearer, and the base portion 730 is fixed to the body surface by the action of the adhesive layer described above.

[6th stage]
13 and 14 are cross-sectional views showing the sixth stage of the insertion operation using the insertion device auxiliary tool according to the present embodiment.

  Referring to FIGS. 13 and 14, the auxiliary device is removed in a state where the cannula 710 is inserted into the wearer's body. At this time, since the plunger 300 does not hold the insertion device 600, the auxiliary instrument can be easily removed.

[Step 7]
15 and 16 are cross-sectional views showing the seventh stage of the insertion operation using the insertion device auxiliary tool according to the present embodiment.

  Referring to FIGS. 15 and 16, the wearer holds the outer cylinder 620 with other fingers (for example, the index finger and the middle finger) while pressing the upper surface of the inner cylinder 630 with the thumb, and moves the outer cylinder 620 upward. Pull up. Thereby, the puncture needle 610 moves upward together with the outer cylinder 620 and is stored in the inner cylinder 630. Here, as shown in FIG. 15, since the lower surface of the inner cylinder 630 is in contact with the base portion 730 of the indwelling member 700, the indwelling member 700 is pressed against the body surface of the wearer. Therefore, in order to prevent the indwelling member 700 from moving away from the body surface of the wearer, there is no need to press the base portion 730 of the indwelling member 700 downward with the other hand not holding the outer cylinder 620, and puncture is performed. The storing operation of the needle 610 can be performed with one hand.

  In the state where the storage operation is completed, as shown in FIG. 16, the inclined portion 630 </ b> C of the inner cylinder 630 is pressed radially inward by the lower end portion of the outer cylinder 620. As a result, the inner engagement portion 630A opens in the direction of the arrow DR630, and the engagement between the inner cylinder 630 and the indwelling member 700 is released.

[Eighth stage]
17 and 18 are cross-sectional views showing the eighth stage of the insertion operation using the insertion device auxiliary tool according to the present embodiment.

  17 and 18 show a state where the insertion device is removed after the indwelling member 700 has been attached. As shown in FIGS. 17 and 18, the insertion device 600 is removed so as to be separated upward with respect to the indwelling member 700. At this time, since the engagement between the inner engagement portion 630A of the inner cylinder 630 and the indwelling member 700 is released, the insertion device 600 can be easily detached from the indwelling member 700. Furthermore, since the puncture needle 610 is housed in the inner cylinder 630, there is no possibility of erroneous puncture at the tip of the puncture needle 610.

[Function and effect]
According to the auxiliary device for an insertion device according to the present invention, the cannula 710 can be automatically inserted by moving the plunger 300 and the insertion device 600 biased by the biasing force of the coil spring 200 downward. is there. On the other hand, before the cannula 710 is inserted, the insertion device 600 supports the plunger 300 in the upward direction against the urging force of the coil spring 200, so that the plunger 300 does not need to support the insertion device. Therefore, there is no need to provide the plunger 300 with a structure for supporting the insertion device 600, and the plunger 300 and the insertion device 600 can be easily separated after the cannula 710 is inserted. That is, an auxiliary device for an insertion device that can be easily removed from the insertion device 600 after insertion of the cannula 710 is obtained.

[wrap up]
The above contents are summarized as follows. That is, the auxiliary device for an insertion device according to the present embodiment is an auxiliary device for the insertion device 600 for inserting the cannula 710 in the indwelling member of the hypodermic syringe into the body of the wearer. A coil spring 200 as an “urging member” attached to 100 and a plunger which is provided so as to be movable in the vertical direction with respect to the main body 100 and is urged downward together with the insertion device 600 by the urging force of the coil spring 200. 300.

  The insertion device 600 includes a puncture needle 610 inserted into the cannula 710, an outer cylinder 620 holding the puncture needle 610, and an inner cylinder 630 inserted into the outer cylinder 620 so as to be coaxial with the outer cylinder 620. including. An engagement hole 620 </ b> A as a “hole” is formed on the side surface of the outer cylinder 620.

  The main body 100 includes an engagement protrusion 130A as a “protrusion” that can be engaged with the engagement hole 620A. The engagement protrusion 130A and the engagement hole 620A form an “engagement portion” between the main body 100 and the insertion device 600, and the insertion device 600 resists the biasing force of the coil spring 200 before the cannula 710 is inserted. By supporting the plunger 300 in the upward direction, the downward movement of the plunger 300 and the insertion device 600 is restricted. On the other hand, when the cannula 710 is inserted, the engagement between the engagement protrusion 130A and the engagement hole 620A is released, and the plunger 300 and the insertion device 600 urged by the urging force of the coil spring 200 move downward. .

(Embodiment 2)
20 and 21 are perspective views showing a state in which the insertion device is set in the auxiliary device for insertion device according to the second embodiment, and FIGS. 22 and 23 are cross-sectional views showing the states in FIGS. It is. 22 and 23 show cross sections at positions shifted by 90 degrees in the circumferential direction.

  The auxiliary device for insertion device according to the present embodiment is a modification of that according to the first embodiment, and the auxiliary device according to the first embodiment inserts the plunger 300 before the cannula 710 is inserted. Whereas the auxiliary device according to the present embodiment is supported in the upward direction, the insertion device 600 similarly supports the plunger 300 in the upward direction via the indwelling member 700 before the cannula 710 is inserted. It is.

  That is, in the auxiliary instrument according to the present embodiment, the outer cylinder 620 of the insertion device 600 is engaged with the engaging protrusion 620B that can engage with the recess 720A formed between the base portion 730 and the protruding portion 720 of the indwelling member 700. (First protrusion). In addition, after removing the auxiliary instrument from the insertion device 600, the operation portion 620C is pressed in the direction of the arrow DR620C to release the engagement between the engagement protrusion 620B and the recess 720A, and the outer tube 620 with respect to the inner tube 630. Can be slid. The outer cylinder 620 of the insertion device 600 further has an engagement protrusion 620D (second protrusion) formed in a “C” shape that spreads downward, and before the cannula 710 is inserted, As shown in FIG. 23, the lower end of the engagement protrusion 620D is engaged with the protrusion 100A (third protrusion) of the main body 100. The protrusion 100A and the engagement protrusion 620D form an “engagement portion” between the main body 100 and the insertion device 600. Before the cannula 710 is inserted, the insertion device 600 passes through the indwelling member 700 and the coil spring 200. By supporting the plunger 300 upward against the urging force, the downward movement of the plunger 300 and the insertion device 600 is restricted. On the other hand, when inserting the cannula 710, by pressing the trigger 130 downward in FIG. 23, the lower end of the "C" -shaped engagement protrusion 620D is pushed inward, and the lower end of the engagement protrusion 620D is The engagement with the protrusion 100A is released, and the plunger 300 and the insertion device 600 that are biased by the biasing force of the coil spring 200 move downward.

  Also in the insertion device auxiliary instrument according to the present embodiment, the cannula 710 can be automatically inserted by moving the plunger 300 and the insertion device 600 biased by the biasing force of the coil spring 200 downward. It is. On the other hand, before the cannula 710 is inserted, the insertion device 600 supports the plunger 300 in the upward direction against the biasing force of the coil spring 200 via the indwelling member 700. There is no need to support, and an insertion device auxiliary tool that can be easily removed from the insertion device 600 after insertion of the cannula 710 can be obtained as in the first embodiment.

  Although the embodiments of the present invention have been described above, the embodiments disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  DESCRIPTION OF SYMBOLS 100 Main body, 100A Protrusion part, 110 Upper cover, 110A Vertical hole, 120 Tube, 130 Trigger, 130A Engagement protrusion, 200 Coil spring, 300 Plunger, 310 Protrusion part, 320 Concave part, 500 Coil spring, 600 Insertion device, 610 Puncture needle , 620 outer cylinder, 620A engagement hole, 620B, 620D engagement protrusion, 620C operation section, 630 inner cylinder, 630A inner engagement section, 630B outer engagement section, 630C inclined section, 640 convex section, 700 indwelling member, 710 Cannula, 720 protruding part, 720A engaging recess, 730 base part.

Claims (3)

An auxiliary device for an insertion device for inserting a cannula in an indwelling member of a hypodermic syringe into a wearer's body,
The body,
An urging member attached to the body;
A plunger that is movable in the vertical direction with respect to the main body, and that is biased downward together with the insertion device by the biasing force of the biasing member;
An engagement portion is provided between the main body and the insertion device,
Before insertion of the cannula, the insertion device supports the plunger upward against the urging force of the urging member, thereby restricting the downward movement of the plunger and the insertion device,
When the cannula is inserted, the engagement of the engaging portion is released, and the plunger and the insertion device that are biased by the biasing force of the biasing member move downward. The insertion device is
A puncture needle inserted into the cannula;
An outer cylinder holding the puncture needle;
An inner cylinder inserted into the outer cylinder so as to be coaxial with the outer cylinder,
A hole is formed on the side surface of the outer cylinder,
The main body includes a protrusion that can be engaged with the hole,
The engaging portion is formed by the protrusion and the hole,
The auxiliary device for an insertion device according to claim 1, wherein the insertion device supports the plunger in an upward direction against an urging force of the urging member before the cannula is inserted. The indwelling member is
A base portion fixed to the body surface of the wearer;
And a protruding portion protruding upward from the base portion,
A recess is formed between the base portion and the protruding portion,
The insertion device includes a first protrusion that can be engaged with the recess, and a second protrusion that is different from the first protrusion,
The main body includes a third protrusion that can be engaged with the second protrusion,
The engagement portion is formed by the second protrusion and the third protrusion,
The auxiliary device for an insertion device according to claim 1, wherein the insertion device supports the plunger upwardly against the urging force of the urging member via the indwelling member before the cannula is inserted. .

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