WO2017134966A1

WO2017134966A1 - Puncture device and method for retaining cannula

Info

Publication number: WO2017134966A1
Application number: PCT/JP2016/088779
Authority: WO
Inventors: 隆弘大越
Original assignee: テルモ株式会社
Priority date: 2016-02-04
Filing date: 2016-12-26
Publication date: 2017-08-10
Also published as: JP6763890B2; JPWO2017134966A1

Abstract

[Problem] To provide a puncture device and a method for implanting a cannula, whereby a cannula can be reliably implanted in a living body. [Solution] A puncture device has: a main body 10 capable of being affixed to the surface of a living body; a puncture needle provided with a cannula and an inner needle inserted in the cannula; a housing for accommodating the puncture needle; a puncture mechanism for performing a puncture operation for making it possible to withdraw the inner needle from the main body with the cannula still protruding after the puncture needle is caused to protrude from the main body, the puncture mechanism being provided in the housing; and a fixing mechanism 120 for fixing the cannula to the main body in a state in which the puncture needle is caused to protrude from the main body. The puncture mechanism is provided with a puncture needle retaining part including a first retaining part 130 and a second retaining part for retaining the inner needle, and an urging member for imparting to the puncture needle retaining part an urging force in the protrusion direction in which the puncture needle is caused to protrude from the main body. The fixing mechanism is provided with an engaging part 150 for engaging the first retaining part with the main body in conjunction with the operation whereby the first retaining part moves relative to the main body in a direction other than the protrusion direction.

Description

Puncture device and cannula placement method

The present invention relates to a puncture device including a puncture needle that is punctured into a living body and a method for placing a cannula.

2. Description of the Related Art Conventionally, as a device used to administer a drug solution such as insulin into a living body, a portable administration device used by being attached to a user's skin is known. For example, Patent Document 1 describes an administration device having a cradle that can be attached to a living body, a double-structured puncture device including an inner needle and a cannula, and an insertion device for inserting the cannula into the living body. Has been. The insertion device of the administration device includes a biasing member that applies a biasing force to the puncture device in a direction in which the puncture device projects from the cradle.

In the administration device described above, after inserting the puncture device into the living body using the inserter, the inserter is removed from the cradle while the cannula is held in the cradle attached to the living body. After that, by attaching a storage unit storing a predetermined drug solution or the like to the cradle, the drug solution can be delivered into the living body via the cannula. Here, in order to continuously and stably deliver the drug solution into the living body through the cannula, the cannula needs to be securely placed in the living body. In the administration device described above, the cannula is prevented from falling off the cradle by engaging the cannula with a protrusion provided on the portion of the cradle that holds the cannula.

Japanese translation of PCT publication 2010-531197

However, the above-described engagement between the cannula and the protrusion is performed when the cannula gets over the protrusion using a part of the urging force applied to the puncture tool when the puncture tool is punctured into the living body by the inserter. The In the process of getting over the protrusion, the cannula receives a force from the protrusion due to contact with the protrusion, and thus cannot always be maintained in a posture perpendicular to the skin. As a result, there is a possibility that the cannula cannot be securely placed in the living body because the cannula is pierced obliquely into the skin or the engagement with the protrusion is insufficient. Further, the contact of the cannula with the protrusion before reaching the skin makes it difficult to predict the urging force to be applied to the puncture device, making it difficult to design the urging member in the puncture device.

An object of the present invention is to provide a puncture device and a cannula indwelling method that can securely indwell a cannula with respect to a living body.

In order to achieve the above object, a puncture device according to the present invention accommodates the puncture needle, a puncture needle comprising a main body that can be attached to the surface of a living body, a cannula and an inner needle inserted into the cannula. A housing and a puncture mechanism that is provided in the housing and performs a puncture operation that allows the inner needle to be removed from the main body while the cannula is projected after the puncture needle protrudes from the main body And a fixing mechanism for fixing the cannula to the main body in a state where the puncture needle protrudes from the main body. The puncture mechanism includes a puncture needle holding portion including a first holding portion that holds the cannula and a second holding portion that holds the inner needle, and a biasing force in a protruding direction that causes the puncture needle to protrude from the main body portion. And an urging member applied to the puncture needle holding unit. The fixing mechanism includes an engaging portion that engages the first holding portion with the main body portion as the first holding portion moves relative to the main body portion in a direction different from the protruding direction. Is provided.

The cannula indwelling method according to the present invention for achieving the above object is a method in which the cannula is indwelled on a living body in a state of being fixed to the living body surface. A cannula indwelling method according to the present invention includes a puncture needle including the cannula and an inner needle inserted into the cannula, a main body that can be attached to the surface of the living body, and a first holding unit that holds the cannula. And a puncture needle holding portion including a second holding portion that holds the inner needle, and a biasing member that applies a biasing force in a protruding direction that causes the puncture needle to protrude from the main body portion to the puncture needle holding portion. A first step of affixing the body portion of the puncture device having the housing to the surface of the living body. In the cannula indwelling method according to the present invention, the urging force of the urging member is released by moving the housing relative to the main body in a direction different from the projecting direction. In the second step of causing the puncture needle to protrude from the main body portion, and in a state in which the puncture needle is protruded from the main body portion, the housing is relative to the main body portion in a direction different from the protruding direction. A third step of engaging the engaging part provided in the first holding part with the engaging part provided in the main body part, and the engaging part of the first holding part And the engagement portion of the main body portion are engaged with each other by moving the housing relative to the main body portion in a direction different from the projecting direction. Release the connection with the main unit, and With serial within the needle and the second holding portion, further comprising a fourth step of the separable from said main body portion.

The puncture device according to the present invention has the fixing mechanism that fixes the first holding portion to the main body in a state where the puncture needle protrudes from the main body. The fixing mechanism includes an engaging portion that engages the first holding portion with the main body portion. The engaging portion engages the first holding portion with the main body portion in accordance with the movement of the first holding portion relative to the main body portion in a direction different from the protruding direction of the puncture needle. Accordingly, since the operation of projecting the puncture needle from the main body portion and the operation of fixing the first holding portion to the main body portion can be performed independently, the puncture needle holding portion is operated in the operation of projecting the puncture needle from the main body portion. It is possible to avoid receiving a force from the engaging portion. In addition to the urging force applied to the puncture needle holding part by the urging member, a force for engaging the first holding part with the main body part can be independently applied to the first holding part. Therefore, in a state where the puncture needle protrudes from the main body portion, the first holding portion that holds the puncture needle can be reliably fixed to the main body portion. Therefore, it is possible to provide a puncture device that can securely place a cannula with respect to a living body.

According to the indwelling method of the cannula according to the present invention, the operation of causing the puncture needle to protrude from the main body portion and the operation of fixing the first holding portion to the main body portion can be performed independently. It is possible to avoid the puncture needle holding part from receiving a force from the engaging part in the projecting operation. In addition to the urging force applied to the puncture needle holding part by the urging member, a force for engaging the first holding part with the main body part can be independently applied to the first holding part. Therefore, in a state where the puncture needle protrudes from the main body portion, the first holding portion that holds the puncture needle can be reliably fixed to the main body portion. Therefore, it is possible to provide a cannula placement method that can securely place a cannula with respect to a living body.

It is a perspective view which shows the puncture apparatus which concerns on embodiment. It is a disassembled perspective view which shows the puncture apparatus which concerns on embodiment. 3A is a plan view showing the mounting portion, FIG. 3B is a rear view showing the mounting portion, and FIG. 3C is a right side view showing the mounting portion. It is a disassembled perspective view which shows the housing | casing of the puncture apparatus which concerns on embodiment. 5A is a perspective view showing the first member of the casing attached to the mounting portion, and FIG. 5B shows the first member of the casing attached to the mounting portion from another angle. It is a perspective view shown. 6A is an enlarged view of a region 6A shown in FIG. 5A, and FIG. 6B is an enlarged view of a region 6B shown in FIG. 5B. FIG. 7A is a perspective view showing the second member of the casing attached to the mounting portion, and FIG. 7B shows the second member of the casing attached to the mounting portion from another angle. It is a perspective view shown. 8A is an enlarged view of the region 8A shown in FIG. 7A, and FIG. 8B is an enlarged view of the region 8B shown in FIG. 7B. It is a perspective view which shows the puncture needle holding | maintenance part of the puncture apparatus which concerns on embodiment. 10A is a perspective view showing the first holding part of the puncture needle holding part, and FIG. 10B is a cross-sectional view taken along the line 10B-10B shown in FIG. 10A. FIG. 11A is a perspective view of the second holding portion of the puncture needle holding portion, and FIG. 11B shows the second holding portion in a state where the engagement between the lock arm and the main member is released in the second holding portion. FIG. 11C is a cross-sectional view taken along line 11C-11C shown in FIG. 11A. 12A is an enlarged view of a region 12A shown in FIG. 11C, and FIG. 12B is an enlarged view showing a main part in a cross section taken along line 12B-12B shown in FIG. 11A. . 13A is a cross-sectional view taken along line 13A-13A shown in FIG. 1, and FIG. 13B is a cross-sectional view corresponding to FIG. 13A in a state in which the puncture needle protrudes. 14A is a cross-sectional view taken along line 14A-14A shown in FIG. 1, and FIG. 14B is a cross-sectional view corresponding to FIG. 14A in a state where the puncture needle protrudes. FIG. 14A is a cross-sectional view corresponding to FIG. 14A showing a state where the housing is separated from the main body in a state where the second holding part of the puncture needle holding part of the puncture device according to the present embodiment releases the first holding part. FIG. 16A is a perspective view showing the inside of the housing, and FIG. 16B is a perspective view showing the inside of the housing in a state where the second holding portion of the puncture needle holding portion is housed in the housing. is there. It is a bottom view which shows a housing | casing. It is a perspective view which shows the 2nd member of the housing | casing of the puncture apparatus which concerns on this embodiment. FIG. 19A is a perspective view showing a housing that accommodates the puncture needle holder before the puncture needle protrudes, and FIG. 19B shows a housing that accommodates the puncture needle holder when the puncture needle protrudes. FIG. 19C is a perspective view showing a housing that accommodates the puncture needle holder after the puncture needle protrudes. 20A is a perspective view showing the relationship between the first holding portion of the puncture needle holding portion and the main body before the puncture needle protrudes, and FIG. 20B is the first view when the puncture needle protrudes. FIG. 20C is an enlarged view of a region 20 </ b> C in FIG. 20B showing a state where the first holding part and the main body part engage with each other. FIG. 21A is a plan view showing the main part before the first holding part and the main body part are engaged, and FIG. 21B shows the main part in a state where the first holding part and the main body part are engaged. FIG. FIG. 22A is a perspective view of the safety cap of the puncture apparatus according to the embodiment, and FIG. 22B is a perspective view of the safety cap as seen from the direction of the arrow shown in FIG. FIG. 14 is a partial perspective view showing the puncture apparatus according to the embodiment, with a part thereof taken along the line 23-23 shown in FIG. FIG. 24A is a schematic diagram illustrating a state in which the safety cap is attached to the housing of the puncture apparatus according to the embodiment, and FIG. 24B is a state in FIG. 24A in a state after the safety cap is attached to the housing. FIG. 24 is a sectional view taken along line 24B-24B shown in FIG. FIG. 25A is a perspective view showing a state in which the housing is rotated to project the puncture needle in the puncture device according to the embodiment, and FIG. 25B shows the puncture needle holding unit in a state in which the puncture needle is projected. It is a perspective view which shows a mode that a housing | casing is rotated in order to fix a 1st holding | maintenance part to a main-body part. FIG. 26A is a perspective view showing a state in which the housing is rotated to separate the housing of the puncture device according to the embodiment from the main body, and FIG. 26B is a diagram of the housing of the puncture device according to the embodiment. It is a perspective view which shows a mode that it isolate | separates from a main-body part. It is a perspective view which shows a mode at the time of attaching the delivery mechanism for delivering a dosage to a main-body part. It is a schematic plan view which shows the structure of each part in the delivery mechanism for delivering a dosage. 29A and 29B are cross-sectional views taken along line 29-29 in FIG. 28, in which FIG. 29A shows a state before the injection section and the liquid feeding section are connected, and FIG. 29B shows the injection section and the liquid feeding section. It is a figure which shows the state which connected the part.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In addition, the following description does not limit the technical scope and terms used in the claims. Also,
The dimensional ratios in the drawings are exaggerated for convenience of explanation, and may differ from actual ratios.

1 and 2 are a perspective view and an exploded perspective view of the puncture device 100 according to the present embodiment, and FIG. 3 is a diagram mainly used for explaining the configuration of the mounting portion 18 of the main body 10 of the puncture device 100. 4 to 8 are diagrams mainly used for explaining the configuration of the casing 30 of the puncture device 100, and FIGS. 9 to 19 are diagrams mainly used for explaining the configuration and operation of the puncture mechanism 110 of the puncture device 100. 20 and 21 are diagrams for explaining the configuration and operation of the fixing mechanism 120 of the puncture device 100, and FIGS. 22 to 24 are diagrams for explaining the configuration and operation of the safety cap 40 of the puncture device 100. FIG. 25 to 29 are diagrams for explaining an example of use of the puncture apparatus 100. FIG.

The puncture apparatus 100 according to the present embodiment can be used with a predetermined delivery mechanism 200 for delivering a drug solution (insulin) or the like (see FIG. 27). The puncture device 100 and the delivery mechanism 200 can configure an administration device that administers a drug solution into the living body.

As shown in FIGS. 1 and 2, the puncture device 100 includes a main body 10 that can be attached to the surface of a living body, a puncture needle 20, a housing 30 that accommodates the puncture needle 20, and a safety cap 40. . As shown in FIG. 9, the puncture needle 20 includes a cannula 21 and an inner needle 22 inserted into the cannula 21.

As shown in FIG. 2, the puncture device 100 is provided in the housing 30, and after the puncture needle 20 protrudes from the main body portion 10, the inner needle 22 is removed from the main body portion 10 with the cannula 21 protruding. It further includes a puncture mechanism 110 that performs a puncturing operation that enables the puncturing operation. The puncture mechanism 110 includes a puncture needle holding portion 111 including a first holding portion 130 that holds the cannula 21 and a second holding portion 140 that holds the inner needle 22, and a protruding direction Z that causes the puncture needle 20 to protrude from the main body portion 10. And an urging member 112 for applying an urging force to the puncture needle holding unit 111.

As shown in FIG. 20C, the puncture device 100 further includes a fixing mechanism 120 that fixes the cannula 21 to the main body 10 in a state where the puncture needle 20 protrudes from the main body 10. The fixing mechanism 120 is an engaging portion that engages the first holding portion 130 with the main body portion 10 as the first holding portion 130 moves relative to the main body portion 10 in a direction different from the protruding direction Z. 150.

As shown in FIG. 1, the puncture device 100 is provided in a state in which a safety cap 40 is attached to a housing 30 connected to the main body unit 10. The main body 10 can be attached to a desired location where the cannula 21 is desired to be placed in the living body. When the safety cap 40 is removed, the housing 30 becomes rotatable relative to the main body portion 10 with the protruding direction Z of the puncture needle 20 as an axis. In conjunction with the operation of rotating the housing 30 relative to the main body 10, the puncture needle 20 protrudes, the cannula 21 is fixed to the main body 10, and the connection between the main body 10 and the housing 30 is released. Is performed continuously. That is, by a simple operation of rotating the housing 30 relative to the main body 10, the puncture of the puncture needle 20 into the living body, the reliable placement of the puncture needle 20 in the living body, and the removal from the main body 10. The removal operation of the housing 30 can be performed continuously. Therefore, the puncture device 100 has an advantage of being excellent in safety, convenience, and operability. Below, the puncture apparatus 100 is demonstrated in detail.

First, the overall configuration of the puncture apparatus 100 will be described.

As shown in FIGS. 1 and 2, the main body 10 includes an attachment portion 16 on which an attachment portion 16 that can be attached to a living body and a delivery mechanism 200 that delivers a predetermined dose into the living body via a cannula 21 can be attached. 18 and is configured as a cradle. For example, a known resin material or metal material can be used as a material constituting each part of the main body (cradle) 10.

The attachment part 16 of the main body part 10 is provided on the bottom surface 11 (see FIG. 2) arranged to face the skin surface of the living body when the apparatus is used. The adhering portion 16 is constituted by a double-sided tape attached to the bottom surface 11 so as to extend outward from the bottom surface 11. In addition, as long as the main-body part 10 can be comprised so that attachment to a living body can be comprised, the installation part, a magnitude | size, a shape, a configuration form, etc. are not specifically limited. For example, it can be formed by applying an adhesive or the like to the bottom surface 11.

As shown in FIGS. 2 and 3, the mounting portion 18 of the main body 10 includes a mounting surface 12 formed in a planar shape and a side wall 13 that partially surrounds the outer periphery of the mounting surface 12. Yes. On the mounting surface 12, the delivery mechanism 200 can be disposed after the housing 30 is removed from the main body 10 (see FIG. 27). The mounting surface 12 is formed with an insertion hole 12a through which the puncture needle 20 can be inserted. The side wall 13 prevents the displacement of the delivery mechanism 200 disposed on the placement surface 12 and the drop-off from the main body 10.

As shown in FIG. 3, in the present embodiment, the side wall 13 of the main body 10 has a first side wall 13 a extending in one direction along the outer periphery of the mounting surface 12 and an outer periphery of the mounting surface 12. A second side wall 13b extending in the other direction intersecting with one direction along the third side wall 13c extending along the outer periphery of the mounting surface 12 so as to face the first side wall 13a, Have

The first side wall 13a is formed with a first opening 13a1 into which a first lock claw 37a of a second member 35 of the casing 30 described later is inserted and removed. The second side wall 13b is formed with a second opening 13b1 into which the second lock claw 37b of the second member 35 is inserted and removed.

Next, the puncture needle 20 will be described.

The puncture needle 20 includes a cannula 21 and an inner needle 22 inserted into the cannula 21. The cannula 21 and the inner needle 22 can be configured by, for example, a known hollow needle having a flow path formed therein. The outer diameter, the inner diameter, the length dimension, and the like of the cannula 21 and the inner needle 22 only need to be able to puncture a living body, and any one according to the intended use can be used.

In the present embodiment, the cannula 21 is configured as a cannula that introduces a medical solution such as insulin into the living body while being punctured into the living body. As shown in FIG. 10 (B), the cannula 21 has a cylindrical shape and a truncated cone shape formed continuously with the cylindrical shape, and the cylindrical shape and the truncated cone shape have continuous lumens through which a drug solution flows. Is formed. The cannula 21 is configured to have a so-called funnel-like shape by having the above-described shape. The cannula 21 is formed of a resin material, for example. As the resin material for forming the cannula 21, for example, polyurethane, nylon, ethylene-tetrafluoroethylene copolymer (ETFE), or the like can be used.

The inner needle 22 is formed of, for example, a metal material. As a metal material for forming the inner needle 22, for example, stainless steel, aluminum, aluminum alloy, titanium, titanium alloy, or the like can be used.

Next, the housing 30 will be described.

The housing 30 is configured to be connectable and detachable to the main body 10. As shown in FIGS. 2 and 4, the housing 30 includes a first member 31 that accommodates the puncture mechanism 110, and a first member with the protruding direction Z of the puncture needle 20 as an axis in a state of covering the first member 31. And a second member 35 that is rotatably attached to 31.

As shown in FIGS. 4 and 5, the first member 31 extends from the substantially cylindrical cylindrical body 32 and the outer peripheral surface 32 a of the cylindrical body 32, and the first member 31 is connected to the main body 10. A leg portion 33 that abuts against the placement surface 12 of the mounting portion 18. The outer peripheral surface 32 a of the cylindrical body 32 forms a guide surface that guides the rotation of the second member 35 relative to the first member 31 about the protruding direction Z of the puncture needle 20.

Referring to FIGS. 5 and 6, the leg portion 33 includes a first recess 33 a into which the first side wall 13 a of the mounting portion 18 is inserted in a state where the first member 31 is connected to the mounting portion 18, and And a second recess 33b into which the second side wall 13b of the mounting portion 18 is inserted in a state where the one member 31 is connected to the mounting portion 18. By inserting the first side wall 13a into the first recess 33a, the movement of the first member 31 is restrained in the direction intersecting the extending direction of the first side wall 13a. Further, by inserting the second side wall 13b into the second recess 33b, the movement of the first member 31 is restrained in the direction intersecting the extending direction of the second side wall 13b. As a result, in the state where the first member 31 is connected to the mounting portion 18, the movement in the surface direction of the placement surface 12 and the movement in the rotation direction about the direction intersecting the surface direction of the placement surface 12 are restrained. Is done.

As shown in FIGS. 4 and 7, the second member 35 includes a first cylindrical body 36 having a substantially cylindrical shape having an inner diameter substantially equal to or slightly larger than the outer diameter of the cylindrical body 32 of the first member 31. In a state where the two members 35 are connected to the mounting portion 18, the second member 35 is disposed closer to the mounting portion 18 than the first cylindrical body 36, and has an outer diameter larger than the outer diameter of the first cylindrical body 36. Puncture with respect to the first cylindrical body 36 and the second cylindrical body 37, the cylindrical second cylindrical body 37, the connecting portion 38 that connects the first cylindrical body 36 and the second cylindrical body 37, And a knob 39 for applying a rotational force with the protruding direction Z of the needle 20 as an axis. In the state where the inner peripheral surface of the first cylindrical body 36 of the second member 35 is guided by the outer peripheral surface 32 a of the cylindrical body 32 of the first member 31 by applying a rotational force to the knob portion 39, The two members 35 rotate relative to the first member 31.

Referring to FIGS. 7 and 8, the second cylindrical body 37 has a first lock claw that is inserted into and removed from the first opening 13 a 1 of the mounting portion 18 according to the rotation of the second member 35. 37a and a second lock claw 37b in which the mounting portion 18 is inserted into and removed from the second opening 13b1 in accordance with the rotation of the second member 35. The first lock claw 37 a and the second lock claw 37 b have an arc shape extending along the outer peripheral surface 37 c of the second cylinder 37. The first lock claw 37a and the second lock claw 37b are inserted into and removed from the first opening 13a1 and the second opening 13b1 of the mounting portion 18 in the direction intersecting the surface direction of the placement surface 12, respectively. The movement of the second member 35 can be restricted and the restriction can be released.

Next, the puncture mechanism 110 will be described.

As shown in FIGS. 2 and 9 to 15, the puncture mechanism 110 applies to the puncture needle holding portion 111 a puncture needle holding portion 111 that holds the puncture needle 20 and a biasing force in the protruding direction Z of the puncture needle 20. And an urging member 112.

The puncture needle holding unit 111 includes a first holding unit 130 that holds the cannula 21 and a second holding unit 140 that holds the inner needle 22. The puncture needle holding part 111 is accommodated in the housing 30 in a state where it can move in the protruding direction Z of the puncture needle 20.

As shown in FIG. 10, the first holding unit 130 includes a base 131 that holds a portion of the cannula 21 in a protruding state, and a liquid supply pipe 222 that supplies a chemical solution from the outside of the first holding unit 130 (FIG. 29). (See (B)) a connection port 132 having a lumen 132a to be inserted, a cap 133 attached so as to cover the connection port 132, and a base 131 attached to a side different from the side holding the cannula 21 A lid member 134 and a seal member 135 provided between the base 131 and the lid member 134 are provided.

The base portion 131 is a portion that becomes a base of the first holding portion 130, and is configured in a substantially cylindrical shape in the present embodiment. The base 131 includes an internal space 131 a in which the cannula 21 is installed. The internal space 131 a is configured to have a funnel shape in accordance with the shape of the cannula 21 so that the cannula 21 can be supported. On the outer periphery of the base 131, a recess 136 is provided in which the arm 143 of the second holding unit 140 of the puncture mechanism 110 is engaged.

The connection port 132 extends in the base 131 in a direction intersecting with the cylindrical axis of the cannula 21. The lumen 132a of the connection port 132 and the internal space 131a of the base 131 communicate with each other.

The cap 133 is preferably formed of a material having the following characteristics. That is, (i) the liquid feeding pipe 222 that supplies the chemical solution from the outside of the first holding unit 130 can be inserted, and (ii) the liquid feeding pipe 222 and the connection port 132 are inserted in a liquid-tight manner. (Iii) The hole formed in the cap 133 by inserting the liquid feeding pipe 222 is formed of a material having the characteristics that it is closed after the liquid feeding pipe 222 is removed. It is preferable. Examples of the material having such characteristics include rubber.

The lid member 134 has a function of pressing the seal member 135. A through hole 137 through which the inner needle 22 can be inserted is formed in the lid member 134 coaxially with the axial direction of the cannula 21.

The seal member 135 is configured so that the inner needle 22 can be inserted, and prevents the insulin from leaking out from the through hole 137 after the inner needle 22 is removed from the through hole 137. Examples of the material of the seal member 135 include rubber.

As shown in FIG. 11A and FIG. 12, the second holding portion 140 has a main member 141 that holds the inner needle 22 and a plate-like shape that is separated from the main member 141 in the protruding direction Z of the inner needle 22. The auxiliary member 142 includes a pair of arms 143 that are rotatably connected to the auxiliary member 142 to sandwich the first holding unit 130. The second holding unit 140 is configured to set a distance h between the pair of connecting members 144 that connect each of the pair of arms 143 and the main member 141 and the main member 141 and the sub member 142 in the protruding direction Z of the inner needle 22. And a lock arm 145 that maintains a predetermined size.

As shown in FIG. 12A, the main member 141 has a plate-like base material 141a and a holding portion 141b for holding the inner needle 22. The holding portion 141b protrudes with a cylindrical shape from a surface different from the surface facing the sub member 142 in the base material 141a. The method for holding the inner needle 22 by the holding portion 141b is not particularly limited. In the present embodiment, the holding portion 141b holds the inner needle 22 in a state where the inner needle 22 is inserted into the lumen 141c of the holding portion 141b. In the present embodiment, the lumen 141c and the inner needle 22 are bonded by an adhesive.

12B, each of the pair of arms 143 includes an engaging claw 143a that engages with the recess 136 of the first holding unit 130. The engaging claw 143a is provided at a position separated from the connection portion 143b connected to the sub member 142 in the arm 143. Thereby, the distance d between the engaging claws 143a of the pair of arms 143 changes as the arm 143 rotates with the connection portion 143b between the arm 143 and the sub member 142 as a fulcrum. As a result, the pair of arms 143 can switch between a state in which the first holding unit 130 is held and a state in which the holding of the first holding unit 130 is released.

The connecting member 144 connects the main member 141 with a location 143c different from the location where the engagement claw 143a is provided in the arm 143 and the connection location 143b connected to the sub member 142. As a result, when the distance h between the main member 141 and the sub member 142 in the protruding direction Z of the inner needle 22 changes, a torque applied to the connecting portion 143b as a fulcrum is applied to the arm 143 by the force applied from the connecting member 144. It is done. As a result, the arm 143 rotates with the connection location 143b as a fulcrum.

As shown in FIG. 12 (A), the lock arm 145 includes an engaging claw 145c that is rotatably connected to the sub member 142 at one end 145a and that engages with the main member 141 at the other end 145b. When the engagement claw 145c of the lock arm 145 is engaged with the main member 141, the distance h between the main member 141 and the sub member 142 in the protruding direction Z of the inner needle 22 is maintained at a predetermined size. As a result, the rotation of the arm 143 using the connection portion 143b connected to the sub member 142 in the arm 143 as a fulcrum is restricted. As a result, it is possible to prevent the holding of the first holding unit 130 by the arm 143 from being performed at an unintended timing.

As shown in FIG. 13, the urging member 112 applies an urging force in the protruding direction Z of the puncture needle 20 to the puncture needle holding part 111 in the housing 30.

As shown in FIG. 13, in the present embodiment, the cylindrical body 32 of the first member 31 of the housing 30 includes a support portion 32 b that supports one end portion 112 a of the urging member 112 and the protruding direction of the puncture needle 20. And a protrusion 32c that restricts the movement of the urging member 112 in the direction crossing Z.

As shown in FIGS. 12B and 14, in the present embodiment, the connecting member 144 of the second holding portion 140 has an end portion 112 b different from the end portion 112 a supported by the support portion 32 b in the biasing member 112. The support part 144a which supports is provided.

13A and 14A, the urging member 112 is supported between the support part 32b on the housing 30 side and the support part 144a on the puncture needle holding part 111 side. Since the puncture needle holding part 111 is accommodated in the housing 30 in a state where it can move in the protruding direction Z of the puncture needle 20, the support part 32b on the housing 30 side and the support part 144a on the puncture needle holding part 111 side are arranged. The distance between them can be shorter than the natural length of the biasing member 112. The distance between the support portion 32b on the housing 30 side and the support portion 144a on the puncture needle holding portion 111 side is made shorter than the natural length of the biasing member 112, so that the support portion 32b and the puncture needle on the housing 30 side A biasing force is applied from the biasing member 112 to the support portion 144a on the holding portion 111 side.

As described above, the movement of the casing 30 in the protruding direction Z of the puncture needle 20 is restricted in a state where the casing 30 is connected to the main body 10. Therefore, the housing 30 does not move in the protruding direction Z of the puncture needle 20 due to the urging force applied from the urging member 112 to the support portion 32b on the housing 30 side. On the other hand, the puncture needle holding part 111 is movable in the protruding direction Z of the puncture needle 20 in the state accommodated in the housing 30. Therefore, the puncture needle holding part 111 moves in the protruding direction Z of the puncture needle 20 by the urging force applied from the urging member 112 to the support part 144a on the puncture needle holding part 111 side. As a result, as shown in FIGS. 13B and 14B, the puncture needle 20 passes through the insertion hole 12 a formed in the placement surface 12 of the main body 10 and protrudes from the main body 10.

As shown in FIGS. 16 and 17, in this embodiment, the cylindrical body 32 of the first member 31 of the housing 30 guides the movement of the puncture needle holding unit 111 along the protruding direction Z of the puncture needle 20. A groove 32d is further provided. The puncture needle holding part 111 is accommodated in the housing 30 in a state where the side surface 143d (see FIG. 11A) of the arm 143 of the second holding part 140 faces the side surface 32e of the guide groove 32d. The puncture needle holding unit 111 moves in the protruding direction Z of the puncture needle 20 by the urging force applied by the urging member 112 while the side surface 143d of the arm 143 of the second holding unit 140 is guided by the side surface 32e of the guide groove 32d. To do.

As shown in FIGS. 13 and 16, the cylindrical body 32 of the first member 31 of the housing 30 abuts on each of the pair of lock arms 145 of the second holding unit 140, thereby each of the pair of lock arms 145. Includes a lock wall 32f that is engaged with the main member 141 of the second holding part 140. The lock wall 32f contacts each of the pair of lock arms 145 in a state before the puncture needle 20 protrudes from the main body 10 (for example, the state shown in FIG. 13A). When the puncture needle 20 protrudes from the main body 10 (for example, the state shown in FIG. 13B), the contact between each of the pair of lock arms 145 and the lock wall 32f is released.

Since the cylindrical body 32 of the first member 31 of the housing 30 includes the lock wall 32f, each of the pair of lock arms 145 is engaged with the main member 141 of the second holding unit 140 before the puncture needle 20 protrudes. The combined state is maintained. Thereby, the state in which the arm 143 of the second holding unit 140 sandwiches the first holding unit 130 in the state before the puncture needle 20 protrudes is maintained.

On the other hand, the lock wall 32f cancels the state where it abuts on each of the pair of lock arms 145 in a state where the puncture needle 20 protrudes from the main body portion 10. As a result, the state in which each of the pair of lock arms 145 of the second holding part 140 is engaged with the main member 141 of the second holding part 140 is released, so that the main member 141 and the auxiliary member in the protruding direction Z of the inner needle 22 are released. The distance h between the member 142 is larger than a predetermined size. Therefore, the state where the arm 143 of the second holding unit 140 holds the first holding unit 130 is released. As a result, as shown in FIG. 15, the housing 30 can be separated from the main body 10 in a state where the first holding portion 130 remains in the main body 10.

Referring to FIG. 9 again, the puncture mechanism 110 further includes a restricting portion 113 that restricts the movement of the puncture needle holding portion 111 against the biasing force applied by the biasing member 112. Then, the restriction by the restriction portion 113 is released in conjunction with an operation in which the housing 30 rotates relative to the main body portion 10 about the protruding direction Z of the puncture needle 20.

The restricting portion 113 is punctured against the first restricting portion 113a that maintains the state where the puncture needle 20 does not protrude against the biasing force applied by the biasing member 112 and the biasing force that the biasing member 112 applies. And a second restricting portion 113b for maintaining the protruding amount of the needle 20 at a predetermined size.

As shown in FIGS. 11A and 11C, the main member 141 of the second holding unit 140 further includes a column 141d that protrudes from a surface different from the surface of the main member 141 that faces the sub member 142. . The 1st control part 113a is equipped with the shape protruded in a mutually different direction from the outer peripheral surface 141e of the support | pillar 141d along one direction which cross | intersects the protrusion direction Z of the inner needle 22. As shown in FIG. Further, the second restricting portion 113b protrudes in pairs in different directions from the outer peripheral surface 141e of the support post 141d along the direction intersecting the protruding direction Z of the inner needle 22 and the protruding direction of the first restricting portion 113a. It has a shape. The second restricting portion 113b is formed away from the first restricting portion 113a in a direction different from the protruding direction Z of the puncture needle 20 on the outer peripheral surface 141e of the support post 141d.

On the other hand, as shown in FIG. 18, a concave portion 39 a that is recessed in the protruding direction Z of the puncture needle 20 is formed at the top of the knob portion 39 of the second member 35 of the housing 30. And the recessed part 39a contacts the 1st control part 113a and the 2nd control part 113b, and the control surface 39b which controls the movement of the 1st control part 113a and the 2nd control part 113b in the protrusion direction Z of the puncture needle 20 At the bottom of the recess 39a.

The keyhole 39c comprised so that the 1st control part 113a can move is formed in the control surface 39b. When the housing 30 in a state in which the puncture needle holding unit 111 is accommodated is viewed in plan view from the protruding direction Z of the puncture needle 20, the outline of the first restriction part 113a, the outline of the second restriction part 113b, and the outline of the key hole 39c It has substantially the same shape.

As shown in FIG. 19A, the first restricting portion 113a is in contact with the restricting surface 39b when the puncture needle 20 is not protruding. At this time, the position of the key hole 39c formed in the restricting surface 39b is shifted from the position of the first restricting portion 113a. As a result, the puncture needle holder 111 applied with the urging force by the urging member 112 is restricted from moving in the protruding direction Z of the puncture needle 20.

As shown in FIG. 19B, when the second member 35 of the housing 30 is rotated relative to the first member 31 in a state where the puncture needle 20 does not protrude, the restriction surface 39b is formed. The position of the key hole 39c matches the position of the first restricting portion 113a. Thereby, the 1st control part 113a can move to the protrusion direction Z of the puncture needle 20 through the keyhole 39c. As a result, the puncture needle holding portion 111 moves in the protruding direction Z of the puncture needle 20 and the puncture needle 20 protrudes from the main body portion 10 (see FIGS. 13B and 14B).

As shown in FIG. 19C, the second restricting portion 113b contacts the restricting surface 39b in a state where the puncture needle 20 protrudes. At this time, since the protruding direction of the second restricting portion 113b intersects the protruding direction of the first restricting portion 113a, the position of the second restricting portion 113b is shifted from the position of the key hole 39c. Therefore, the second restricting portion 113b does not pass through the keyhole 39c when the puncture needle 20 protrudes. Thereby, in the state where the puncture needle 20 protrudes, the puncture needle holding part 111 to which the urging force is applied by the urging member 112 is restricted from moving in the protruding direction Z of the puncture needle 20. As a result, the puncture needle 20 can be prevented from protruding more than necessary.

Next, the fixing mechanism 120 that fixes the cannula 21 to the main body 10 will be described.

As shown in FIG. 20C and FIG. 21, the fixing mechanism 120 includes the first holding unit 130 in accordance with the movement of the first holding unit 130 relative to the main body unit 10 in a direction different from the protruding direction Z. An engaging portion 150 that engages the holding portion 130 with the main body portion 10 is provided. The engaging part 150 includes a first engaging part 151 provided on the first holding part 130 side and a second engaging part 152 provided on the main body part 10 side and engaged with the first engaging part 151. Prepare.

In the present embodiment, the first engaging portions 151 are provided so as to protrude from the outer peripheral surface of the base 131 of the first holding portion 130 in different directions along the direction intersecting the protruding direction Z of the puncture needle 20. It is done. The first engaging portion 151 includes a base 151 a that protrudes from the outer peripheral surface of the base portion 131 of the first holding portion 130, and an engaging claw 151 b that is provided to protrude from the base 151 a along the outer peripheral surface of the base portion 131. Have. The second engagement portion 152 includes a base 152 a that protrudes from the placement surface 12 in a direction opposite to the protruding direction Z of the puncture needle 20, and a base that extends in a direction that intersects the protruding direction Z of the puncture needle 20. It has an engaging claw 152b that protrudes from the base 152a on the top side of the base 152a and engages with the engaging claw 151b of the first engaging part 151 of the first holding part 130 in a state where the puncture needle 20 protrudes.

In the present embodiment, the first holding part 130 and the main body part 10 are engaged by rotating the first holding part 130 relative to the main body part 10 about the protruding direction Z of the puncture needle 20.

Specifically, the first holding part 130 and the main body part 10 are first held in conjunction with an operation in which the housing 30 rotates relative to the main body part 10 about the protruding direction Z of the puncture needle 20. The part 130 is engaged by rotating relative to the main body part 10.

In the present embodiment, as shown in FIGS. 18 and 19C, the second restriction formed in the second holding portion 140 of the puncture needle holding portion 111 is formed in the concave portion 39 a of the second member 35 of the housing 30. By pressing the portion 113b, a protrusion 39d is provided that applies a rotational force about the protruding direction Z of the puncture needle 20 to the second holding portion 140.

As shown in FIG. 14B, the guide groove 32d formed in the first member 31 of the housing 30 is formed on the second holding portion 140 of the puncture needle holding portion 111 in a state where the puncture needle 20 protrudes. It is not provided at a position facing the arm 143. As a result, the puncture needle holding portion 111 is rotatable in the housing 30 around the protruding direction Z of the puncture needle 20 when the puncture needle 20 is projected.

Since the second member 35 has the protrusion 39d, the second holding unit 140 is rotated in accordance with the operation of rotating the second member 35 relative to the first member 31 in a state where the puncture needle 20 protrudes. . As a result, as shown in FIG. 20C, the first holding portion 130 held by the second holding portion 140 is also rotated, and the first engaging portion 151 provided on the first holding portion 130 side is engaged. The claw 151b and the engagement claw 152b of the second engagement portion 152 provided on the main body 10 side are engaged.

As the first holding part 130 moves relative to the main body part 10 in a direction different from the protruding direction Z, the engaging part 150 that engages the first holding part 130 with the main body part 10 is fixed. The mechanism 120 includes the following. That is, since the operation of projecting the puncture needle 20 from the main body 10 and the operation of fixing the first holding unit 130 to the main body 10 can be performed independently, the operation of projecting the puncture needle 20 from the main body 10 is possible. It is possible to avoid the puncture needle holding part 111 from receiving a force from the engaging part 150. In addition to the urging force applied to the puncture needle holding unit 111 by the urging member 112, a force for engaging the first holding unit 130 with the main body unit 10 can be independently applied to the first holding unit 130. Therefore, the first holding part 130 that holds the puncture needle 20 can be reliably fixed to the main body part 10 in a state where the puncture needle 20 protrudes from the main body part 10.

In this embodiment, the housing 30 and the main body 10 are connected to each other with the engaging portion 150 engaged with the main body 10 and the first holding portion 130 with the protruding direction Z of the puncture needle 20 as an axis. Is released by rotating relative to the main body 10.

Referring to FIGS. 7 and 8, the first lock claw 37 a and the second lock claw 37 b of the second member 35 of the housing 30 are configured so that the main body 10 and the first holding part 130 are engaged with each other in the engaging part 150. When the second member 35 rotates relative to the main body 10 in the engaged state, the second member 35 has a predetermined length so as to be separated from the first opening 13a1 and the second opening 13b1 of the side wall 13 of the main body 10. It is formed with.

Since the first lock claw 37 a and the second lock claw 37 b have a predetermined length, the connection between the housing 30 and the main body 10 is established in the engagement portion 150 between the main body 10 and the first holding portion. The housing 30 is released by rotating relative to the main body 10 in a state in which the housing 130 is engaged. As a result, the first holding part 130 can be fixed to the main body part 10 and the housing 30 and the main body part 10 can be connected to each other by a simple single operation of rotating the housing 30 relative to the main body part 10. Release can be performed continuously.

Further, from another viewpoint, the first lock claw 37 a and the second lock claw 37 b are not changed until the main body portion 10 and the first holding portion 130 are engaged in the engagement portion 150. The first lock claw 37a and the second lock claw 37b have a length that maintains the state in which they are inserted into the first opening 13a1 and the second opening 13b1. Thereby, it is possible to prevent the connection between the housing 30 and the main body 10 before the main body 10 and the first holding part 130 are engaged in the engaging part 150.

Next, the safety cap 40 will be described.

Referring to FIGS. 22 and 23, safety cap 40 is configured to be connectable / separable to housing 30 and restricts rotation of housing 30 with respect to main body 10 in a state of being connected to housing 30. . The safety cap 40 is a protrusion inserted between the wall surface 39e (see FIG. 18) of the concave portion 39a of the knob portion 39 of the second member 35 and the second restricting portion 113b of the second holding portion 140 of the puncture needle holding portion 111. 40a.

The protrusion 40a is inserted between the wall surface 39e of the concave portion 39a of the second member 35 and the second restricting portion 113b of the second holding portion 140 of the puncture needle holding portion 111, whereby the second member 35 with respect to the first member 31 is inserted. Rotation is regulated. Thereby, it can prevent that the housing | casing 30 rotates relatively with respect to the main-body part 10 at the timing which is not intended.

Referring to FIG. 24, the safety cap 40 is configured to be attachable to the housing 30 in a state where the inner needle 22 removed from the cannula 21 is covered after the housing 30 is separated from the main body portion 10. The safety cap 40 includes an engaging claw 40 b that engages with the first member 31 of the housing 30. Referring to FIG. 4, an opening 33 c that engages with an engaging claw 40 b of the safety cap 40 is provided in the leg portion 33 of the first member 31 of the housing 30. Referring to FIG. 24, the safety cap 40 is attached to the housing 30 by the engagement claw 40 b of the safety cap 40 engaging with the opening 33 c.

Next, a usage example of the puncture apparatus 100 will be described mainly with reference to FIGS.

First, using the puncture device 100 in the living body, the attachment portion 16 of the main body portion 10 is attached to a desired location where the cannula 21 is to be placed.

Next, the safety cap 40 attached to the housing 30 is removed. Thereby, the second member 35 of the housing 30 can be rotated with respect to the first member 31.

Next, as shown in FIG. 25A, the first lock claw 37a and the second lock claw 37b of the second member 35 are disengaged from the first opening 13a1 and the second opening 13b1 of the mounting portion 18. The second member 35 is rotated relative to the first member 31 using the knob 39 in the direction (see FIG. 8A). The relative rotation of the second member 35 with respect to the first member 31 is formed in the position of the key hole 39c formed in the concave portion 39a of the second member 35 and the column 141d of the second holding portion 140 of the puncture needle holding portion 111. This is performed until the position of the first restricting portion 113a matches (see FIG. 19B). When the position of the key hole 39c matches the position of the first restricting portion 113a, the restriction of movement of the puncture needle holding portion 111 in the protruding direction Z of the puncture needle 20 is released, and the puncture needle 20 protrudes from the main body portion 10 ( (See FIGS. 13B and 14B).

Next, as shown in FIG. 25 (B), the first lock claw 37a and the second lock claw 37b of the second member 35 are moved away from the first opening 13a1 and the second opening 13b1. The second member 35 is further rotated relative to the first member 31. At this time, the second restricting portion 113b formed on the support post 141d of the second holding portion 140 of the puncture needle holding portion 111 is pressed by the protrusion 39d formed on the concave portion 39a of the second member 35 (FIG. 19 ( C)). Thereby, the puncture needle holding part 111 is rotated around the protruding direction Z of the puncture needle 20.

Next, in accordance with the operation of rotating the puncture needle holding unit 111 about the protruding direction Z of the puncture needle 20, the first engagement portion 151 of the first holding unit 130 of the puncture needle holding unit 111 and the main body unit 10 are rotated. The second engaging portion 152 is engaged (see FIG. 20C). Thereby, the first holding part 130 is fixed to the main body part 10. By fixing the first holding unit 130 to the main body unit 10, the cannula 21 is reliably placed in the living body while being held by the first holding unit 130.

Next, referring to FIG. 26 (A), the first member 31 moves in the direction in which the first lock claw 37a and the second lock claw 37b are detached from the first opening 13a1 and the second opening 13b1. In contrast, the second member 35 is further rotated relatively. Then, the first lock claw 37a and the second lock claw 37b are detached from the first opening 13a1 and the second opening 13b1. Thereby, the restriction | limiting of the movement of the 2nd member 35 in the direction which cross | intersects the surface direction of the mounting surface 12 is cancelled | released.

Next, referring to FIG. 26 (B), the connection between the main body 10 and the housing 30 is released by pulling up the housing 30 in the direction opposite to the protruding direction Z of the puncture needle 20.

Next, the safety cap 40 removed from the housing 30 is attached to the housing 30. Specifically, by engaging the engaging claw 40b formed on the safety cap 40 with the opening 33c formed on the leg portion 33 of the first member 31 of the housing 30, the safety cap 40 is mounted on the housing. 30 (see FIGS. 4 and 24B). Thereby, the erroneous puncture by the puncture needle 20 after the housing | casing 30 is isolate | separated from the main-body part 10 can be prevented.

By the above operation, placement of the cannula 21 in the living body using the puncture device 100 is completed.

Next, as shown in FIG. 27, after removing the housing 30 from the main body 10, the sending mechanism 200 is attached to the main body 10.

As described above, after removing the housing 30 from the main body 10, the first holding part 130 is left in the main body 10. By connecting the delivery mechanism 200 for administering a predetermined dose to the first holding unit 130, the inside of the cannula 21 is connected via the inner cavity 131 a of the connection port 132 of the first holding unit 130 and the inner space 131 a of the base 131. The dose can be delivered to As a result, the administration product can be delivered into the living body via the cannula 21 held in the internal space 131a of the base 131.

The delivery mechanism 200 to be used is not particularly limited as long as a predetermined dose can be fed into the cannula 21, but for example, as shown in FIGS. 27 and 28, it is necessary for the liquid feeding operation. A liquid feeding reuse unit 210 including a driving mechanism 211 that generates a driving force for driving various members and a liquid feeding disposable unit 220 including a drug solution storage unit 221 filled with insulin are used.

The liquid feed reuse unit 210 and the liquid feed disposable unit 220 are configured to be connected and separated. When the insulin or the like in the drug solution storage part is used up after a predetermined period of time, the liquid delivery reuse part 210 and the liquid delivery disposable part 220 are separated, and the liquid delivery disposable part 220 is made disposable and replaced with a new one. Can do. On the other hand, the liquid supply reuse unit 210 is mounted with relatively expensive components such as a motor 211a and a gear 211b, which will be described later, which are less expensive to replace than components mounted on the liquid supply disposable unit 220. In this way, a component member discarded after use for a predetermined period and a relatively expensive component member are mounted in different housings, respectively, and the relatively expensive component member is mounted in the liquid feeding reuse unit 210 and can be reused. By doing so, it is possible to reduce the manufacturing cost of the apparatus and the cost associated with use.

The liquid supply reuse unit 210 includes a drive mechanism 211 that drives members necessary for performing the liquid supply operation, a control unit 212 that controls the drive mechanism 211, and a first housing 213 that holds these. In FIG. 28, a part surrounded by a dotted line X represents a part attached to the liquid feeding reuse part 210, and a part surrounded by a one-dot chain line Y represents a part attached to the liquid feeding disposable part 220. In FIG. 28, the first housing 213 is omitted for easy understanding.

The drive mechanism 211 includes a motor 211a having an output shaft that generates rotation by the electric power from the battery 224 of the liquid delivery disposable unit 220, and a speed reduction generated by the motor 211a to the extrusion mechanism 223 of the liquid delivery disposable unit 220. A plurality of gears 211b for transmission.

As shown in FIG. 28, the liquid delivery disposable unit 220 includes a drug solution storage unit 221 filled with a drug solution (insulin or the like) as an administration, a lumen 132a of the connection port 132 of the first holding unit 130, and a drug solution storage unit. A liquid supply pipe 222 that communicates with 221; a push mechanism 211 that is mechanically connected to the drive mechanism 211 to push the insulin in the drug solution storage unit 221 to the liquid supply pipe 222; and a battery that supplies power to the drive mechanism 211 and the like 224 and a second housing 225 for holding them. Note that the administration is not limited to a drug solution, and may be any as long as it is intended for administration into a living body, and the administration state may be liquid, gas, solid (for example, powder) , Granular material), gel and the like.

The liquid feeding tube 222 is constituted by a metal thin tube having a sharp tip shape, for example. In the case of such a configuration, as shown in FIG. 29A, when the delivery mechanism 200 is coupled to the main body 10 while sliding the delivery mechanism 200 relative to the main body 10, the structure shown in FIG. As shown, the sharp tip of the liquid feeding tube 222 passes through the cap 133 of the first holding unit 130, and the liquid feeding tube 222 is inserted into the inner cavity 132 a of the connection port 132. That is, while performing the operation of connecting the delivery mechanism 200 to the main body unit 10, the liquid supply tube 222 and the connection port 132 are connected, and the assembly operation is performed so that the chemical solution can be fed into the first holding unit 130. be able to.

As shown in FIG. 28, the push-out mechanism 223 includes a slide part 226 that can move forward and backward in the internal space of the chemical solution storage part 221, and a feed screw that meshes with a female screw formed on the slide part 226 to move the slide part 226 forward and backward. 227 and a gear 228 that meshes with the gear 211b of the drive mechanism 211 and is connected to the feed screw 227.

The slide part 226 includes a push plate 226a capable of moving forward and backward in the chemical liquid storage part 221 while maintaining a sealing property so that the chemical liquid does not leak to the slide part 226 side, and a feed plate in which a female screw that meshes with the feed screw 227 is formed. 226b and a connecting plate 226c for connecting the push member 226a and the feed plate 226b.

After connecting the liquid feeding pipe 222 and the connection port 132, the feed screw 227 is rotated via the gear 211b of the drive mechanism 211 and the gear 223c of the push-out mechanism 223 by driving the motor 211a of the drive mechanism 211. As the feed screw 227 rotates, the feed plate 226b moves along the helical axis of the male screw of the feed screw 227. The pushing member 226a connected to the feed plate 226b through the connecting plate 226c moves in the chemical solution storage unit 221 as the feed plate 226b moves. When the extruding member 226a moves in a direction in which the pusher member 226a is pushed into the medicinal solution storage unit 221 (a direction in which the volume of the containing space decreases), the dose in the containing space formed by the medicinal solution storage unit 221 and the pushing member 226a is transferred to the liquid feeding tube 222. The liquid is sent to Insulin fed to the liquid feeding tube 222 is introduced into the living body (indicated by reference symbol P in FIG. 29) via the inner cavity 132a of the connection port 132, the inner space 131a of the base 131, and the cannula 21.

In this way, the puncture device 100 from which the housing 30 is removed and the predetermined delivery mechanism 200 can constitute an administration device that administers the administration into the living body, and administration of the administration using this administration device. It becomes possible to do.

As described above, the puncture apparatus 100 according to the present embodiment has the fixing mechanism 120 that fixes the first holding unit 130 to the main body 10 in a state where the puncture needle 20 protrudes from the main body 10. The fixing mechanism 120 includes an engaging portion 150 that engages the first holding portion 130 with the main body portion 10. The engaging portion 150 moves the first holding portion 130 to the main body portion 10 in accordance with an operation in which the first holding portion 130 moves relative to the main body portion 10 in a direction different from the protruding direction Z of the puncture needle 20. Engage with. Thereby, since the operation | movement which protrudes the puncture needle 20 from the main-body part 10 and the operation | movement which fixes the 1st holding | maintenance part 130 to the main-body part 10 can be performed independently, the operation | movement which protrudes the puncture needle 20 from the main-body part 10 In this case, the puncture needle holding part 111 can be prevented from receiving a force from the engaging part 150. In addition to the urging force applied to the puncture needle holding unit 111 by the urging member 112, a force for engaging the first holding unit 130 with the main body unit 10 can be independently applied to the first holding unit 130. Therefore, the first holding part 130 that holds the puncture needle 20 can be reliably fixed to the main body part 10 in a state where the puncture needle 20 protrudes from the main body part 10. Therefore, it is possible to provide a puncture device that can securely place a cannula with respect to a living body.

Further, according to the puncture device 100, the engaging portion 150 is provided on the first holding portion 130 side and the main body portion 10 side, and is engaged with the first engaging portion 151. A second engagement portion 152. Thereby, the 1st holding | maintenance part 130 can be engaged with the main-body part 10 with a simple structure. Therefore, the puncture device can be easily manufactured.

Further, according to the puncture device 100, in the engaging part 150, the first holding part 130 and the main body part 10 are relative to the main body part 10 about the protruding direction Z of the puncture needle 20. Engaged by rotating in an automatic manner. Thereby, the first holding unit 130 can be engaged with the main body unit 10 by a simple operation of rotating the first holding unit 130. Therefore, the operability when using the puncture device is improved.

Further, according to the puncture device 100, the housing 30 is configured to be connectable and detachable from the main body 10 by rotating relative to the main body 10. In the engaging portion 150, the first holding portion 130 and the main body portion 10 are interlocked with an operation in which the housing 30 rotates relative to the main body portion 10 about the protruding direction Z of the puncture needle 20. The first holding part 130 is engaged by rotating relative to the main body part 10. Further, the connection between the main body 10 and the housing 30 is such that the housing 30 is the main body about the protruding direction Z of the puncture needle 20 when the first holding portion 130 and the main body 10 are engaged in the engaging portion 150. It is released by rotating relative to the part 10. As a result, the first holding part 130 can be fixed to the main body part 10 and the housing 30 and the main body part 10 can be connected to each other by a simple single operation of rotating the housing 30 relative to the main body part 10. Release can be performed continuously. Therefore, the operability when using the puncture device is further improved.

Moreover, according to the puncture device 100, the puncture mechanism 110 further includes a restricting portion 113 that restricts the movement of the puncture needle holding portion against the urging force. Then, the restriction by the restriction portion 113 is released in conjunction with an operation in which the housing 30 rotates relative to the main body portion 10 with the protruding direction Z as an axis. Thereby, the puncture of the puncture needle 20 into the living body and the fixing of the first holding unit 130 to the main body 10 by a simple one-time operation of rotating the housing 30 relative to the main body 10. The connection between the casing 30 and the main body 10 can be released continuously. Therefore, the operability when using the puncture device is further improved.

Further, the puncture apparatus 100 is configured to be connectable / separable to the housing 30, and further includes a safety cap 40 that regulates the rotation of the housing 30 relative to the main body 10 when connected to the housing 30. Thereby, since it can prevent that the housing | casing 30 rotates relatively with respect to the main-body part 10 at the timing which is not intended, the erroneous launch of the puncture needle 20 is prevented. Therefore, safety when using the puncture device is improved.

Further, according to the puncture device 100, the safety cap 40 is configured to be attachable to the housing 30 in a state of covering the inner needle 22 removed from the cannula 21 after the housing 30 is separated from the main body portion 10. The Thereby, the erroneous puncture by the puncture needle 20 after the housing | casing 30 is isolate | separated from the main-body part 10 can be prevented. Therefore, the safety when using the puncture device is further improved.

Moreover, according to the puncture device 100, the main body 10 includes the attachment portion 16 to which the attachment portion 16 that can be attached to a living body and the delivery mechanism 200 that sends a predetermined dose into the living body via the cannula 21 can be attached. A cradle having Thereby, after the puncturing operation by the puncture mechanism 110 is completed, it becomes possible to administer the administration using the puncture device 100, and thus the convenience is further improved.

Although the puncture device according to the present invention has been described based on the embodiment, the puncture device according to the present invention is not limited to the configuration described in the embodiment, and may be appropriately changed based on the description of the scope of claims. Is possible.

For example, in the above-described embodiment, the first holding part 130 and the main body part 10 are engaged when the first holding part 130 rotates relative to the main body part 10 about the protruding direction Z of the puncture needle 20. Combined. However, the operation of engaging the first holding portion with the main body is not limited as long as the first holding portion is an operation that moves relative to the main body in a direction different from the protruding direction of the puncture needle. For example, the engaging part is configured so that the first holding part and the main body part engage with the movement of the first holding part relative to the main body part in the surface direction of the mounting surface of the mounting part. It may be configured.

In the above-described embodiment, the engaging portion 150 is provided on the first holding portion 130 side and the main body portion 10 side, and engages with the first engaging portion 151. And a second engaging portion 152. However, the configuration of the engaging portion is as long as the first holding portion engages with the main body portion in accordance with the movement of the first holding portion relative to the main body portion in a direction different from the protruding direction. It is not limited. For example, the engaging portion engages with a first engaging portion provided on the first holding portion side, a second engaging portion provided on the main body portion side, the first engaging portion and the second engaging portion. An engagement member, and the first engagement portion and the second engagement portion may be configured to engage with each other via the engagement member.

Also, the protruding direction of the puncture needle can be arbitrarily set as long as the cannula can be fixed to the main body in a state where the cannula protrudes from the main body. For example, when the mounting surface of the main body in the above-described embodiment is used as a reference, the angle formed by the protruding direction of the puncture needle and the mounting surface can be set to an arbitrary angle including a vertical angle.

This application is based on Japanese Patent Application No. 2016-020275 filed on Feb. 4, 2016, the disclosure of which is incorporated by reference as a whole.

10 Main body,
12 Placement surface,
13 side walls,
13a first sidewall,
13a1 first opening,
13b second side wall,
13b1 second opening,
16 Adhering part,
18 mounting part,
20 puncture needle,
21 cannula,
22 Inner needle,
30 housing,
31 first member,
32 cylinders,
32a outer peripheral surface,
32b support,
32c protrusion,
32d guide groove,
32e side,
32f lock wall,
33 legs,
33a first recess,
33b second recess,
33c opening,
35 second member,
36 first cylinder,
37 second cylinder,
37a first locking claw,
37b second lock claw,
37c outer peripheral surface,
39 Knob part,
39a recess,
39b regulatory aspects,
39c keyhole,
39d protrusion,
39e wall surface,
40 safety cap,
40a protrusion,
40b engaging claw,
100 lancing device,
110 Puncture mechanism,
111 puncture needle holder,
112 biasing member,
113 Regulatory Department,
113a 1st regulation part,
113b 2nd regulation part,
120 fixing mechanism,
130 first holding part,
140 second holding part,
141 main members,
141a base material,
141b holding part,
141c lumen,
141d strut,
141e outer peripheral surface,
142 secondary members,
143 arm,
143a engaging claw,
144 connecting member,
144a support,
145 lock arm,
145c engaging claw,
150 engaging portion,
151 first engaging portion,
152 second engaging portion,
200 delivery mechanism,
Z Projection direction of puncture needle,
d, h Distance.

Claims

A body that can be attached to the surface of a living body;
A puncture needle comprising a cannula and an inner needle inserted into the cannula;
A housing for housing the puncture needle;
A puncture mechanism that is provided in the housing and performs a puncture operation that allows the inner needle to be removed from the main body while the cannula is protruded after the puncture needle protrudes from the main body.
A fixing mechanism for fixing the cannula to the main body in a state where the puncture needle protrudes from the main body,
The puncture mechanism includes a puncture needle holding portion including a first holding portion that holds the cannula and a second holding portion that holds the inner needle, and a biasing force in a protruding direction that causes the puncture needle to protrude from the main body portion. An urging member to be applied to the puncture needle holding unit,
The fixing mechanism includes an engaging portion that engages the first holding portion with the main body portion as the first holding portion moves relative to the main body portion in a direction different from the protruding direction. A puncture device comprising:
The engagement portion includes a first engagement portion provided on the first holding portion side, and a second engagement portion provided on the main body portion side and engaged with the first engagement portion. The puncture device according to claim 1.
2. The engagement portion, wherein the first holding portion and the main body portion are engaged by rotating the first holding portion relative to the main body portion about the protruding direction. Or the puncture apparatus of Claim 2.
The housing is configured to be connectable / separable from the main body by rotating relative to the main body,
In the engaging portion, the first holding portion and the main body portion are configured such that the first holding portion is interlocked with an operation in which the housing rotates relative to the main body portion with the protruding direction as an axis. Engaged by rotating relative to the main body,
The connection between the main body and the housing is relative to the main body with respect to the projecting direction in a state where the first holding portion and the main body are engaged in the engagement portion. The puncture device according to claim 3, wherein the puncture device is released by rotating it automatically.
The puncture mechanism further includes a restricting portion that restricts movement of the puncture needle holding portion against the biasing force,
The puncture apparatus according to claim 4, wherein the restriction by the restriction portion is released in conjunction with an operation in which the housing rotates relative to the main body portion with the protruding direction as an axis.
6. The device according to claim 4, further comprising a safety cap configured to be connectable and separable to the housing and restricting rotation of the housing relative to the main body in a state of being connected to the housing. Puncture device.
The puncture device according to claim 6, wherein the safety cap is configured to be attachable to the housing in a state of covering the inner needle removed from the cannula after the housing is separated from the main body. .
The main body portion includes an attachment portion that can be attached to a living body, and a cradle having a mounting portion to which a delivery mechanism that delivers a predetermined dose into the living body can be attached via the cannula. The puncture device according to any one of 7.
A cannula indwelling method in which a cannula is indwelled with respect to a living body in a state of being fixed to a living body surface,
A puncture needle comprising the cannula and an inner needle inserted into the cannula;
A main body that can be attached to the surface of the living body;
A puncture needle holding portion including a first holding portion for holding the cannula and a second holding portion for holding the inner needle, and a biasing force in a protruding direction for causing the puncture needle to protrude from the main body portion are applied to the puncture needle holding portion. An energizing member to be provided, and a housing provided with;
A first step of affixing the main body of the puncture device to the surface of the living body;
The urging force of the urging member is released by moving the housing relative to the main body in a direction different from the protruding direction, and the puncture needle protrudes from the main body. Two steps,
In the state in which the puncture needle is protruded from the main body, the housing is provided in the first holding portion by moving the housing relative to the main body in a direction different from the protruding direction. A third step of engaging the engaging portion with the engaging portion provided in the main body portion;
In a state in which the engagement portion of the first holding portion and the engagement portion of the main body portion are engaged, the housing is relatively moved in a direction different from the protruding direction with respect to the main body portion. A fourth step of releasing the connection between the casing and the main body by moving the casing and separating the casing together with the inner needle and the second holding section from the main body; A method for indwelling the cannula.
The cannula indwelling method according to claim 9, wherein the first to fourth steps are continuously performed by an operation of moving the casing relative to the main body in a direction different from the protruding direction. .