JP2015142626A - Puncture unit and chemical solution administration unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a puncture unit and a chemical solution administration unit in which an outer needle can be easily inserted, and a puncture device can be easily detached from a cradle device.SOLUTION: A puncture device 3 comprises a body 41 and a puncture mechanism 42. The puncture mechanism 42 comprises an inner needle 67, a needle holding part 73, a protection cover 74, arm parts 76, 77, and an energization member 68. The protection cover 74 is arranged so as to cover the periphery of a needle tip of the inner needle 67 and stores the needle tip of the inner needle 67. The arm parts 76, 77 move the protection cover 74 to a position storing the needle tip of the inner needle 67. The puncture device 3 performs all of the following operations with a single operation: a puncture operation for puncturing a living body with an outer needle 6 and the inner needle 67 in the puncture mechanism 42 and extracting the inner needle 67 from the outer needle 6; a separation operation for separating the body 41 from a cradle device 2; and a cover operation for moving the protection cover 74 by the arm parts 76, 77 to a position storing the needle tip of the inner 67.

Description

  The present invention relates to a puncture unit that punctures an outer needle using an inner needle having a needle tip that can be punctured in a living body, and a drug solution administration unit that includes the puncture unit.

  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 drug solution administration device used by being attached to a user's skin is known.

  For example, the technique described in Patent Document 1 includes a cradle that can be attached to a living body and an inserter attached to the cradle. In the technique described in Patent Document 1, a living body is punctured with a double-structured puncture tool including an inner needle and a cannula using an inserter, and then the inserter is removed from the cradle. And after that, the chemical | medical solution is sent out via the cannula by attaching | installing the storage part in which the predetermined | prescribed chemical | medical solution etc. were stored to the cradle.

JP 2010-531197 gazette

  However, in the technique described in Patent Document 1, the operation of removing the inserter from the cradle has been performed manually by the user. Specifically, the user removes the inserter from the cradle by pushing the cradle with one hand while pulling the inserter from the cradle with the other hand. At this time, the user must take great care not to accidentally puncture with the puncture tool while using both hands, and therefore, the removal work of the inserter takes a lot of time and effort. It was.

  In particular, when the cradle is brought into contact with an arm or the like, or when the cradle is brought into contact with a body surface part or the like that is difficult for the user to see, a very complicated operation has been forced. As a result, the technique described in Patent Document 1 has a problem that convenience during use is significantly impaired.

  In view of the above problems, an object of the present invention is to provide a puncture unit and a drug solution administration unit that can easily puncture an outer needle and easily detach the puncture device from a cradle device.

In order to solve the above problems and achieve the object of the present invention, the puncture unit of the present invention includes a cradle device that can be attached to the surface of a living body, an outer needle, and a puncture device.
The outer needle penetrates the living body through the cradle device. The puncture device is detachably attached to the cradle device, punctures the outer needle into the living body, and attaches the outer needle to the cradle device. The puncture device includes a housing and a puncture mechanism. The housing is detachably attached to the cradle device. The puncture mechanism punctures the living body with the outer needle and attaches the outer needle to the cradle device.
The puncture mechanism includes an inner needle, a needle holding portion, a protective cover, an arm portion, and an urging member.
The inner needle is removably inserted into a cylindrical hole of the outer needle and has a needle tip that can be punctured into a living body. The needle holding unit holds the inner needle. The protective cover is disposed so as to cover the periphery of the needle tip of the inner needle and stores the needle tip of the inner needle. The arm portion moves the protective cover to a position where the needle tip of the inner needle is stored. The urging member urges the outer needle, the inner needle, the needle holding portion, the protective cover, and the arm portion in the direction of puncturing the living body.
The puncture device includes a puncture operation in which the outer needle and the inner needle in the puncture mechanism are punctured into the living body to remove the inner needle from the outer needle, a separation operation to separate the housing from the cradle device, and an inner needle by the arm unit. All cover operations for moving the protective cover to the position for storing the needle tip are performed by the same operation.

Moreover, the chemical | medical solution administration unit of this invention is equipped with the cradle apparatus which can be affixed on the surface of a biological body, an outer needle, a puncture apparatus, and a chemical | medical solution administration apparatus.
The outer needle penetrates the living body through the cradle device. The puncture device is detachably attached to the cradle device, punctures the outer needle into the living body, and attaches the outer needle to the cradle device. The drug solution administration device is detachably attached to the cradle device, and administers the drug solution to the living body via an outer needle attached to the cradle device.
In addition, the puncture device includes a housing and a puncture mechanism. The housing is detachably attached to the cradle device. The puncture mechanism punctures the living body with the outer needle and attaches the outer needle to the cradle device.
The puncture mechanism includes an inner needle, a needle holding portion, a protective cover, an arm portion, and an urging member.
The inner needle is removably inserted into a cylindrical hole of the outer needle and has a needle tip that can be punctured into a living body. The needle holding unit holds the inner needle. The protective cover is disposed so as to cover the periphery of the needle tip of the inner needle and stores the needle tip of the inner needle. The arm portion moves the protective cover to a position where the needle tip of the inner needle is stored. The urging member urges the outer needle, the inner needle, the needle holding portion, the protective cover, and the arm portion in the direction of puncturing the living body.
The puncture device includes a puncture operation in which the outer needle and the inner needle in the puncture mechanism are punctured into the living body to remove the inner needle from the outer needle, a separation operation to separate the housing from the cradle device, and an inner needle by the arm unit. All cover operations for moving the protective cover to the position for storing the needle tip are performed by the same operation.

  According to the puncture unit and the drug solution administration unit of the present invention, since the puncture operation, the separation operation, and the cover operation for moving the protective cover can be performed by the same operation, the puncture unit excellent in convenience during use and A medicinal solution administration unit can be provided.

It is a perspective view which shows the example of embodiment of the puncture unit of this invention. It is a disassembled perspective view which shows the example of embodiment of the puncture unit of this invention. It is a perspective view which shows the embodiment of the chemical | medical solution administration apparatus and cradle apparatus of this invention. It is a top view which shows the example of embodiment of the puncture unit of this invention. It is sectional drawing which shows the state cut | disconnected by the L1-L1 line | wire shown in FIG. It is a perspective view which shows the 2nd member of the puncture apparatus in the embodiment of the puncture unit of this invention. It is the perspective view which looked at the 2nd member of the puncture apparatus in the embodiment of the puncture unit of this invention from the opposite side. It is a perspective view which shows the needle holding member of the puncture apparatus in the embodiment of the puncture unit of this invention. It is a perspective view which shows the state which moved the protection car of the needle | hook holding member of the puncture apparatus in the embodiment of the puncture unit of this invention. It is a perspective view explaining the puncture operation | movement in the embodiment of the puncture unit of this invention. It is sectional drawing which shows the state cut | disconnected by the L2-L2 line | wire shown in FIG. It is sectional drawing which shows the state cut | disconnected by the S1-S1 line | wire shown in FIG. It is a perspective view explaining the puncture operation | movement in the embodiment of the puncture unit of this invention. It is a schematic diagram explaining operation | movement of the inner needle and outer needle | hook of a puncture operation | movement in the embodiment of the puncture unit of this invention. It is a perspective view explaining the cover operation | movement of the inner needle after use in the embodiment of the puncture unit of this invention. It is sectional drawing which shows the state cut | disconnected by the S2-S2 line | wire shown in FIG. It is sectional drawing which shows the state cut | disconnected by the L3-L3 line | wire shown in FIG. It is a perspective view explaining the cover operation | movement of the inner needle after use in the embodiment of the puncture unit of this invention. It is sectional drawing which shows the state cut | disconnected by the S3-S3 line | wire shown in FIG.

  Hereinafter, embodiments of the puncture device and the drug solution administration unit of the present invention will be described with reference to FIGS. In addition, the same code | symbol is attached | subjected to the common member in each figure. The present invention is not limited to the following form.

<Embodiment example>
1. Configuration Example of Chemical Solution Administration Unit First, a configuration example of an embodiment of the drug solution administration unit of the present invention (hereinafter referred to as “this example”) will be described with reference to FIGS.
FIG. 1 is a perspective view showing a puncture unit of this example, FIG. 2 is an exploded perspective view showing a puncture unit of this example, and FIG. 3 is a perspective view showing a drug solution administration device and a cradle device of this example. FIG. 4 is a plan view showing the puncture unit of this example, and FIG. 5 is a cross-sectional view showing a state cut along line L1-L1 shown in FIG.

  As shown in FIGS. 1, 2, and 4, the chemical solution administration unit 1 includes a cradle device 2, a puncture device 3 that is detachably attached to the cradle device, and a chemical solution administration device 4 that is attached to the cradle device 2. , A connection port 5 and a hollow outer needle 6. The connection port 5 and the outer needle 6 are previously supported by the puncture device 3 and are attached to the cradle device 2 by the puncture operation of the puncture device 3. The cradle device 2, the puncture device 3, the connection port 5, and the outer needle 6 constitute a puncture unit 7 of this example.

  Here, the direction in which the puncture device 3 punctures the living body 6 with the outer needle 6 is the puncture direction Z1, the direction orthogonal to the puncture direction Z1 is the first direction X1, and the direction orthogonal to the puncture direction Z1 and the first direction X1. The second direction is Y1.

[Medical solution administration device]
Next, the chemical solution administration device 4 will be described.
A drug solution administration device 4 shown in FIG. 2 is a portable device for continuously administering a drug solution such as insulin into a patient's body.

  The chemical solution administration device 4 includes an exterior case 11, a chemical solution storage unit 12, a pusher 13, a drive mechanism 14 that moves the pusher 13, and a liquid feeding port 15.

  The outer case 11 is formed in a hollow, substantially rectangular parallelepiped shape. In the outer case 11, a chemical solution storage unit 12, a pusher 13, and a drive mechanism 14 are accommodated. The chemical solution storage unit 12 is formed in a cylindrical shape, one surface is closed, and the other surface is opened. In the chemical solution storage unit 12, a chemical solution is stored. The drug solution storage unit 12 is provided with an administration port (not shown). A liquid feeding tube 16 is connected to the administration port.

  A liquid feeding port 15 is provided at the end of the liquid feeding tube 16 opposite to the administration port. The liquid feeding tube 16 communicates the chemical liquid storage unit 12 with the liquid feeding port 15. The liquid feeding port 15 communicates with the outer needle 6 via a connection port 5 attached to the cradle device 2.

  The pusher 13 is slidably inserted into the cylindrical hole of the chemical solution storage unit 12 in a liquid-tight state. A drive mechanism 14 is connected to the pusher 13. The drive mechanism 14 is driven based on a control signal from a control unit (not shown). When the drive mechanism 14 is driven, the pusher 13 slides in the chemical solution storage unit 12 and sends the chemical solution to the liquid supply tube 16. The drug solution delivered to the solution delivery tube 16 passes through the connection port 5 of the cradle device 2 via the solution delivery port 15 and is administered from the outer needle 6 to the living body.

[Cradle device]
Next, the cradle device 2 will be described.
As shown in FIG. 3, the cradle device 2 includes a substantially flat mounting surface portion 21, a protective wall 22 that partially surrounds the outer periphery of the holy ground portion, and a plurality of side walls provided at a plurality of portions of the protective wall 22. 23 and the fitting part 24 to which the connection port 5 is attached.

  The mounting surface portion 21 is formed in a substantially rectangular shape. The puncture device 3 and the drug solution administration device 4 are placed on one surface 21a of the placement surface portion 21, and the other surface 21b opposite to the one surface 21a of the placement surface portion 21 is in contact with and adhered to the living body.

  A protective wall 22 is continuously provided from one end of the mounting surface portion 21 in the second direction Y1 to a middle portion of the other end of the first direction X1 and the other end of the second direction Y1. The protective wall 22 is erected substantially vertically from the one surface 21a of the placement surface portion 21 toward one side in the puncture direction Z1.

  The plurality of side walls 23 are continuously provided from the protective wall 22 toward one side of the puncture direction Z1. Further, an engagement groove 25 is formed in each of the side wall 23 arranged on one side of the second direction Y1 and the side wall 23 arranged on one side of the first direction X1. The engagement groove 25 formed on the side wall 23 on one side in the second direction Y1 is formed by cutting out a part of one end of the side wall 23 in the first direction X1. Further, the engaging groove formed in the side wall 23 on one side in the first direction X1 is formed by cutting out a part of one end of the side wall 23 in the second direction Y1. The puncture device 3 is engaged with the engagement groove 25.

  Further, a fitting portion 24 is provided on one side of the placement surface portion 21 in the first direction X1 and on one side of the second direction Y1. The fitting portion 24 has a through hole 24a that penetrates the placement surface portion 21 from one surface 21a to the other surface 21b, and an engagement wall 24b provided around the through hole 24a. The engagement wall 24b is erected substantially vertically from the one surface 21a of the placement surface portion 21 toward one side of the puncture direction Z1.

[Connection port]
As shown in FIGS. 2 and 5, the connection port 5 is attached to the fitting portion 24. The connection port 5 includes a main body portion 31 that engages with the engagement wall 24 b of the cradle device 2 and a connection portion 32 to which the liquid feeding port 15 of the drug solution administration device 4 is connected.

  As shown in FIG. 5, a seal space 31 a is formed on one side of the main body 31 in the puncture direction Z <b> 1. A first seal member 33 made of an elastic member is recessed in the seal space 31a. The main body 31 holds the outer needle 6. Further, an inner needle 67 described later passes through the main body 31 along the puncture direction Z1.

  The connection part 32 is provided continuously from the other side of the first direction X1 in the main body part 31. The connection part 32 is formed in a substantially cylindrical shape. In addition, a channel 32 a that communicates with the outer needle 6 held by the main body 31 is formed at a substantially central portion of the connecting portion 32. A second seal member 34 made of an elastic member is recessed in the opening on the opposite side of the main body 31 in the flow path 32a. Further, an O-ring 35 is provided on the outer peripheral surface of the connecting portion 32 for improving the airtightness when the liquid feeding port 15 is connected.

  Further, a needle receiving portion 38 is disposed on one side of the main body portion 31 in the puncturing direction Z1. The needle receiving portion 38 guides the movement of the inner needle 67 in the puncture direction Z1 when an inner needle 67 described later is removed from the outer needle 6. The needle receiving portion 38 also has a function as a buffer member that protects the inner needle 67 when the inner needle 67 protrudes toward the other side of the puncture direction Z1. The needle receiving portion 38 is supported by the puncture device 3 together with the connection port 5, and is attached to the cradle device 2 when the puncture device 3 performs the puncture operation.

[Outer needle]
Next, the outer needle 6 will be described.
As shown in FIG. 5, the outer needle 6 is formed in a hollow cylindrical shape. In addition, the outer needle 6 has a cylindrical hole 6a (see FIG. 14) through which the chemical solution passes. An inner needle 67 described later passes through the cylindrical hole 6 a of the outer needle 6. The outer needle 6 is punctured into the living body by the puncture device 3, and then the inner needle 67 is removed from the tube hole.

  Examples of the material of the outer needle 6 include resin materials such as polyurethane, nylon, and ethylene-tetrafluoroethylene copolymer (ETFE).

[Puncture device]
Next, the puncture device 3 will be described.
The puncture device 3 is a device that is detachably attached to the cradle device 2 and punctures the living body with the outer needle 6. As shown in FIG. 5, the puncture device 3 includes a housing 41 and a puncture mechanism 42 that punctures the living body with the outer needle 6.

  The housing 41 includes a first member 43 and a second member 44 that supports the first member 43 in a rotatable manner.

[First member]
The first member 43 is formed in a hollow substantially hemispherical shape. As shown in FIG. 4, the first member 43 includes a first restriction hole 46, a slide operation portion 47, a first cam portion 48, a second cam portion 49, and a latch receiving portion 50. Yes.

  As shown in FIG. 5, the first restriction hole 46 is formed at the top of the first member 43. The first restriction hole 46 is a through-hole that vertically penetrates the first member 43 along the puncture direction Z1. A pair of key grooves 46 a is formed on the outer edge of the first restriction hole 46. The pair of key grooves 46a are formed to face each other with the through hole interposed therebetween. Further, the pair of key grooves 46 a are opened with a predetermined length from the outer edge of the first restriction hole 46 toward the radially outward direction.

  As shown in FIGS. 1 and 3, the slide operation unit 47 is formed in a substantially flat plate shape. As shown in FIG. 4, the slide operation unit 47 protrudes radially outward from the edge of the first member 43, and has a predetermined length toward the other side of the puncture direction Z <b> 1 as shown in FIGS. 1 and 3. It has been extended. In the vicinity of the slide operation unit 47, a second cam unit 49 is provided.

  As shown in FIGS. 1 and 3, the first cam portion 48 and the second cam portion 49 protrude from the edge of the first member 43 in the radially outward direction, and are substantially perpendicular to the other of the puncture direction Z1. It is bent. As shown in FIG. 4, the first cam portion 48 and the second cam portion 49 are arranged at a predetermined interval in the circumferential direction of the first member 43.

  A first cam piece 48 a is provided on one surface of the first cam portion 48 facing the edge of the first member 43, and one surface of the second cam portion 49 facing the edge of the first member 43. Is provided with a second cam piece 49a. One side in the circumferential direction of the first cam piece 48a and the second cam piece 49a is separated from the edge of the first member 43 and approaches the edge of the first member 43 toward the other side in the circumferential direction. Further, the first cam piece 48a and the second cam piece 49a face the outer peripheral surface of the second member 44 described later.

  Furthermore, an outer flange piece 48b that protrudes radially outward is formed at the other end of the first cam portion 48 in the puncture direction Z1. Similarly, an outer flange piece 49b projecting radially outward is formed at the other end of the second cam portion 49 in the puncture direction Z1. As shown in FIG. 1, the outer flange pieces 48 b and 49 b are slidably inserted into the engagement grooves 25 of the cradle device 2.

  In addition, as shown in FIG. 4, a latch receiving portion 50 is provided at a position facing the slide operation portion 47 with the first restriction hole 46 interposed therebetween at the edge portion of the first member 43. The locking receiving portion 50 protrudes from the edge of the first member 43 in the radially outward direction. As shown in FIG. 5, the second member 44 is inserted into the hemispherical hollow portion of the first member 43.

[Second member]
6 and 7 are perspective views showing the second member 44. FIG.
As shown in FIGS. 6 and 7, the second member 44 has a hollow substantially hemispherical head portion 51 and a hollow substantially cylindrical support portion 52.

  The head 51 is formed in a substantially hemispherical shape and is accommodated in the hollow portion of the first member 43. The head 51 is formed in a shape substantially the same as the outer shape of the first member 43 so that the first member 43 can rotate relative to the second member 44. A second restriction hole 53 that opens in a substantially cross shape is formed at the top of the head 51. As shown in FIG. 5, the second restriction hole 53 communicates with the first restriction hole 46.

  Further, the inner wall of the head portion 51 is provided with a spring receiving portion 54 with which an end portion of a biasing member 68 described later comes into contact. The spring receiving portion 54 is disposed so as to surround the second restriction hole 53. Further, the spring receiving portion 54 protrudes from the inner wall of the head portion 51 toward the other side of the puncture direction Z1.

  The support part 52 is provided at the outer edge of the head 51 in the radially outward direction and at the other end in the puncture direction Z1. The support part 52 includes a first pushing part 56, a second pushing part 57, a locking protrusion 58, a restricting protrusion 59, and a finger hook part 60.

  The 1st pushing part 56 and the 2nd pushing part 57 are arrange | positioned facing the 2nd direction Y1 on both sides of the head 51. The first pushing part 56 is arranged on one side of the second direction Y1, and the second pushing part 57 is arranged on the other side of the second direction Y1. Further, the first pushing portion 56 and the second pushing portion 57 are given elasticity by notching both ends in the circumferential direction from the other end in the puncture direction Z1 of the support portion 52 to the head 51.

  A first cam pin 56 a is provided on the outer peripheral surface of the first pushing portion 56, and a second cam pin 57 a is provided on the outer peripheral surface of the second pushing portion 57. The first cam pin 56 a is a protrusion that protrudes from the first push-in portion 56 in a substantially semicircular shape. The second cam pin 57 a is a protrusion that protrudes from the second push-in portion 57 in a substantially semicircular shape. The first pushing portion 56 is elastically deformed by the first cam pin 56a coming into contact with the first cam piece 48a of the first cam portion 48 provided on the first member 43, and is pushed into the support portion 52 (see FIG. 16). Similarly, the second pushing portion 57 is elastically deformed by the second cam pin 57 a coming into contact with the second cam piece 49 a of the second cam portion 49 provided on the first member 43, and pushed into the support portion 52. It is.

  The locking protrusion 58 is provided on the outer peripheral surface of the support portion 52 and at one end in the puncture direction Z1. The locking projection 58 is locked to a locking receiving portion 50 provided on the first member 43 when the first member 43 is rotated at a predetermined angle (see FIG. 19).

  The restricting protrusion 59 is provided on the outer peripheral surface of the support portion 52 and on the other end in the puncture direction Z1. When the first member 43 rotates, the restricting protrusion 59 abuts on the slide operation unit 47 provided on the first member 43. Thereby, the range of the rotation operation of the first member 43 is limited at the time when the slide operation unit 47 comes into contact with the restriction projection 59.

  Further, in the vicinity of the restricting projection 59, a finger hook portion 60 formed in a tongue shape is disposed. The finger-hanging part 60 protrudes from the outer peripheral surface of the support part 52 in the radially outward direction. When the first member 43 is rotated, the finger-hanging portion 60 is hooked by the user's finger.

A plurality of reinforcing rib pieces 62, a first guide wall 63, and a second guide wall 64 are provided in the internal space 61 of the head 51 and the support portion 52. The plurality of rib pieces 62, the first guide wall 63, and the second guide wall 64 protrude from the inner wall of the head 51 along the puncture direction Z <b> 1. Further, the first guide wall 63 and the second guide wall 64 are arranged to face each other with a predetermined interval in the first direction X1. The first guide wall 63 is disposed on one side in the first direction X1, and the second guide wall 64
Is arranged on the other side of the first direction X1.

  A plurality of mounting recesses 66 are formed in the plurality of rib pieces 62 and the support portion 52. The plurality of mounting recesses 66 are formed by cutting out the other ends of the plurality of rib pieces 62 and the support portion 52 in the puncture direction Z1. As shown in FIG. 1, the plurality of mounting recesses 66 are engaged with the protective wall 22 when the puncture device 3 is attached to the cradle device 2. Thereby, when rotating the 1st member 43, it can control that the 2nd member 44 moves.

  A guide recess 63 a is formed in the first guide wall 63. The guide recess 63 a is provided on one surface of the first guide wall 63 facing the second guide wall 64. The guide recess 63a is a recess that is recessed from one surface of the first guide wall 63 toward the other surface.

  The second guide wall 64 is formed with an opening 64a that opens from the other end of the support portion 52 to one side in the puncture direction Z1 with a predetermined length. As shown in FIG. 5, the coupling portion 32 of the connection port 5 is inserted into the opening 64 a of the second guide wall 64. Further, a needle holding member 70 of the puncture mechanism 42 described later is disposed between the first guide wall 63 and the second guide wall 64.

[Puncture mechanism]
Next, the puncture mechanism 42 will be described.
As shown in FIG. 5, the puncture mechanism 42 includes an inner needle 67, a needle holding member 70 that holds the inner needle 67, and an urging member 68.

  The inner needle 67 is inserted into the cylindrical hole 6 a of the outer needle 6. A blade surface for making the needle tip 67a (see FIG. 14) an acute angle is formed at the tip of the inner needle 67. The needle tip 67a of the inner needle 67 is configured to be able to puncture a living body.

  Examples of the material of the inner needle 67 include stainless steel, but are not limited thereto, and aluminum, aluminum alloy, titanium, titanium alloy, and other metals can be used.

FIG. 8 is a perspective view showing the needle holding member 70.
As shown in FIG. 8, the needle holding member 70 includes an insertion portion 71, a spring receiving portion 72, a needle holding portion 73, a protective cover 74, a gripping portion 75, a first arm portion 76, and a second arm. Part 77.

  The insertion part 71 is formed in a substantially cylindrical shape. As shown in FIG. 5, the insertion portion 71 inserts the first restriction hole 46 of the first member 43 and the second restriction hole 53 of the second member 44 along the puncture direction Z1. As shown in FIG. 8, the insertion part 71 has a pair of key protrusions 71a and a pair of stoppers 71b.

  The pair of key protrusions 71 a are provided in the middle part of the insertion portion 71 in the puncture direction Z1. The pair of key protrusions 71 a protrude from the outer peripheral surface of the insertion portion 71 in the radially outward direction. Further, as shown in FIG. 4, the pair of key protrusions 71 a are formed so that the outer shape when viewed in plan is substantially the same as the pair of key grooves 46 a provided in the first restriction hole 46. The size of the key protrusion 71a is set smaller than the key groove 46a. As shown in FIG. 5, in a state before puncturing the outer needle 6, the key protrusion 71a is in contact with the outer edge of the first restricting hole 46a. Therefore, the movement of the needle holding member 70 and the outer needle 6 in the other direction of the puncture direction Z1 is restricted against a biasing force of a biasing member 68 described later. The key protrusion 71 a and the first restricting hole 46 provided in the first member 43 constitute a restricting portion of the present invention.

  As shown in FIG. 8, the pair of stoppers 71 b are provided at one end of the insertion portion 71 in the puncture direction Z1. The pair of stoppers 71 b protrude from the outer peripheral surface of the insertion portion 71 in the radially outward direction. The pair of stoppers 71 b prevent the needle holding member 70 from falling off the first member 43 by contacting the edge of the first restriction hole 46 in the first member 43.

  Further, a spring receiving portion 72 is provided at the other end of the insertion portion 71 in the puncture direction Z1. The spring receiving portion 72 is formed in a substantially flat plate shape. Further, as shown in FIG. 5, the end of the biasing member 68 is seated on one surface of the spring receiving portion 72.

Here, the urging member 68 will be described.
The urging member 68 is constituted by a coil spring, for example. As shown in FIG. 5, one end of the urging member 68 in the puncture direction Z1 is attached to the spring receiving portion 54 of the second member 44, and the other end of the urging member 68 in the puncture direction Z1 is the spring support of the needle holding member 70. Sitting on one side of the part 72. In the state before puncturing the outer needle 6 shown in FIG. 5, the urging member 68 is against the urging force between the 244 spring receiving portion 54 and the spring receiving portion 72 of the needle holding member 70. Intervened in a compressed state. Therefore, the needle holding member 70 is always urged to the other side of the puncture direction Z1 by the urging force of the urging member 68.

  In addition, although the example which applied the coil spring as an urging member was demonstrated in this example, it is not limited to this. As the urging member, for example, a member having various elasticity such as a leaf spring or rubber may be used.

  As shown in FIGS. 5 and 8, a needle holding portion 73 is provided on the other surface of the spring receiving portion 72. The needle holding portion 73 protrudes from the other surface of the spring receiving portion 72 toward the other side of the puncture direction Z1. The needle holding portion 73 is formed in a substantially cylindrical shape and holds the inner needle 67. Note that the shape of the needle holding portion 73 is not limited to a substantially cylindrical shape, and may be formed in various other shapes such as a quadrangular column and a hexagonal column.

  As shown in FIG. 8, a protective cover 74 is disposed on the other side of the puncture direction Z <b> 1 of the spring receiving portion 72 with the needle holding portion 73 interposed therebetween. The protective cover 74 is formed in a substantially flat plate shape. The protective cover 74 has a substantially cylindrical storage cylinder 74a. As shown in FIG. 5, the storage cylinder 74a has a protective hole 74b that penetrates along the puncture direction Z1 through which the inner needle 67 penetrates. The protective hole 74b is arranged so as to cover the periphery of the needle tip 67a of the inner needle 67, and is configured to be able to store the needle tip 67a of the inner needle 67 (see FIG. 19).

  In a state before the outer needle 6 shown in FIG. 5 is punctured into the living body, the needle tip 67a of the inner needle 67 is exposed from the other side of the puncture direction Z1 from the protective hole 74b of the protective cover 74.

  As shown in FIG. 8, the spring receiving portion 72 and the protective cover 74 are connected by a first arm portion 76 and a second arm portion 77. The first arm portion 76 and the second arm portion 77 are configured to be able to move the protective cover 74 in a direction away from the spring receiving portion 72.

  The first arm portion 76 includes a first rotating piece 81 and a second rotating piece 82. The first rotating piece 81 is rotatably connected to one end of the spring receiving portion 72 in the second direction Y1. One end of the second rotating piece 82 is rotatably connected to an end of the first rotating piece 81 opposite to the end connected to the spring receiving portion 72. Further, the end of the second rotating piece 82 opposite to the end connected to the first rotating piece 81 is rotatably connected to one end of the protective cover 74 in the second direction Y1.

  Similar to the first arm portion 76, the second arm portion 77 has a first rotating piece 83 and a second rotating piece 84. The first rotation piece 83 is rotatably connected to the other end of the spring receiving portion 72 in the second direction Y1. One end of the second rotating piece 84 is rotatably connected to an end of the first rotating piece 83 opposite to the end connected to the spring receiving portion 72. Further, the end of the second rotating piece 84 opposite to the end connected to the first rotating piece 83 is rotatably connected to the other end of the protective cover 74 in the second direction Y1. .

  Further, in a state before the outer needle 6 is punctured into the living body, the first rotating piece 81 and the second rotating piece 82 of the first arm portion 76, and the first rotating piece 83 and the second rotating piece 82 of the second arm portion 77. The two turning pieces 84 are folded. At this time, the needle tip 67a of the inner needle 67 is exposed from the other side of the puncture direction Z1 from the protective hole 74b of the protective cover 74.

FIG. 9 is a perspective view showing a state in which the needle tip of the inner needle 67 is housed in the protective hole 74 b of the protective cover 74.
As shown in FIG. 9, the first rotating piece 81 and the second rotating piece 82 of the first arm portion 76 and the first rotating piece 83 and the second rotating piece 84 of the second arm portion 77 are respectively rotated. When it moves and spreads, the protective cover 74 moves to the other side of the puncture direction Z <b> 1 and moves away from the spring receiving portion 72. The periphery of the needle tip 67a of the inner needle 67 is covered with the protective hole 74b of the protective cover 74, and the inner needle 67 is accommodated in the protective hole 74b.

  Further, as shown in FIG. 8, a first pressing receiving portion 82 a is provided on the second rotating piece 82 of the first arm portion 76. The first pressing receiving portion 82 a is disposed in the vicinity of the connection portion of the second rotating piece 82 with the first rotating piece 81. Further, the first press receiving portion 82 a protrudes substantially vertically from one surface of the second rotating piece 82. Moreover, the 1st press receiving part 82a contacts the 1st pushing part 56 of the 2nd member 44 (refer FIG. 12).

  Similarly, a second pressing receiving portion 84 a is provided on the second rotating piece 84 of the second arm portion 77. The second press receiving portion 84 a is disposed in the vicinity of the connection portion of the second rotating piece 84 with the first rotating piece 83. Further, the second press receiving portion 84 a protrudes substantially vertically from one surface of the second rotating piece 84. Moreover, the 2nd press receiving part 84a contacts the 2nd pushing part 57 of the 2nd member 44 (refer FIG. 12).

  Further, as shown in FIG. 8, a first guide piece 86 is rotatably provided at one end of the protective cover 74 in the first direction X1. The first guide piece 86 protrudes from the protective cover 74 toward one side in the puncture direction Z1. As shown in FIG. 5, the first guide piece 86 contacts the first guide wall 63 of the second member 44.

  Further, as shown in FIG. 8, a second guide piece 87 is rotatably provided at the other end of the protective cover 74 in the first direction X1. The second guide piece 87 protrudes from the protective cover 74 toward one side in the puncture direction Z. As shown in FIG. 5, the second guide piece 87 contacts the second guide wall 64 of the second member 44.

  As described above, the first guide piece 86 and the second guide piece 87 come into contact with the first guide wall 63 and the second guide wall 64 of the second member 44, so that the outer needle 6 and the inner needle 67 are punctured into the living body. At this time, the needle holding member 70 can be moved straight along the puncture direction Z1.

  Further, a hook piece 86 a is provided at the tip of the first guide piece 86, and similarly, a hook piece 87 a is provided at the tip of the second guide piece 87. As shown in FIGS. 8 and 5, the hook pieces 86 a and 87 a are engaged with the spring receiving portion 72 in a state before puncturing. Thereby, in the state before puncturing, the 1st rotation pieces 81 and 83 and the 2nd rotation pieces 82 and 84 of the 1st arm part 76 and the 2nd arm part 77 which were folded are contrary to a user's will. And the protective cover 74 can be prevented from moving to the other side of the puncture direction Z1. Further, it is possible to prevent the connection port 5 held by the holding portion 75 described later from dropping from the puncture device 3 before performing the puncture operation.

  As shown in FIG. 8, the grip part 75 has a first grip piece 75a and a second grip piece 75b. The first gripping piece 75 a is provided on the second rotating piece 82 of the first arm portion 76. The second gripping piece 75 b is provided on the second rotating piece 84 of the second arm portion 77. The 1st holding piece 75a and the 2nd holding piece 75b are arrange | positioned in the vicinity of the edge part connected to the protective cover 74 in the 2nd rotation pieces 82 and 84, respectively.

  And the holding part 75 hold | grips the connection port 5 and the needle | hook receiving part 38 which hold | maintain the outer needle 6 with the 1st holding piece 75a and the 2nd holding piece 75b. As shown in FIG. 9, when the first rotating pieces 81 and 83 and the second rotating pieces 82 and 84 of the first arm portion 76 and the second arm portion 77 rotate, The two gripping pieces 75b are separated from each other. Therefore, the gripping of the connection port 5 and the needle receiving portion 38 by the gripping portion 75 is released, and the connection port 5 and the needle receiving portion 38 can be detached from the gripping portion 75.

2. Puncturing Operation of Puncturing Unit Next, the puncturing operation by the puncturing unit 7 having the above-described configuration will be described with reference to FIGS.
10 is a perspective view illustrating the puncturing operation, FIG. 11 is a cross-sectional view taken along line L2-L2 shown in FIG. 10, and FIG. 12 is a cross-sectional view taken along line S1-S1 shown in FIG. FIG. 13 is a perspective view for explaining the puncturing operation.

  As shown in FIG. 1, a puncture device 3 is attached in advance to the cradle device 2 as the puncture unit 7. Further, as shown in FIG. 5, the connection port 5 that holds the outer needle 6 is held by the puncture device 3, and the inner needle 67 of the puncture device 3 is inserted into the outer needle 6. .

  First, the user holds the puncture unit 7, attaches the cradle device 2 to the portion where the drug solution is administered, and attaches the puncture unit 7 to the living body. As shown in FIG. 1, the outer flange piece 48 b of the first cam portion 48 and the outer flange piece 49 b of the second cam portion 49 provided on the first member 43 in the puncture device 3 are the engagement grooves 25 of the cradle device 2. Has been inserted. Thereby, it is possible to prevent the puncture device 3 from being detached from the cradle device 2 when the puncture unit 7 is attached to the living body.

  Next, as shown in FIG. 10, the first member 43 is rotated in the direction of the arrow shown in FIG. At this time, the first member 43 can be easily rotated with one hand by hooking a finger on the slide operation portion 47 of the first member 43 and the finger hooking portion 60 of the second member 44.

  The mounting recess 66 provided in the support portion 52 of the second member 44 is engaged with the protective wall 22 on one side in the first direction X1 and the protective wall 22 in the second direction Y1 of the cradle device 2. . Thereby, it can control that the 2nd member 44 moves, and can rotate operation of the 1st member 43 in the stable state.

  Next, the first member 43 is further rotated so that the key groove 46a provided in the first restriction hole 46 of the first member 43 and the position of the key protrusion 71a of the needle holding member 70 are aligned along the puncture direction Z1. When the positions of the key groove 46a and the key protrusion 71a are aligned, the urging member 68 that has been compressed and held extends as shown in FIGS. The needle holding member 70 is urged toward the other side of the puncture direction Z1 by the elastic force of the urging member 68. As a result, the needle holding member 70 approaches the other side of the puncture direction Z1, that is, the fitting portion 24 of the cradle device 2.

  Then, as shown in FIG. 12, the connection port 5 held by the holding portion 75 of the needle holding member 70 approaches the fitting portion 24, and the connection port 5 is fitted into the fitting portion 24. In addition, the inner needle 67 held by the needle holding member 70 penetrates the through hole 24a of the fitting portion 24 together with the outer needle 6 and is punctured into the living body. When the connection port 5 that holds the outer needle 6 is fitted into the fitting portion 24 of the cradle device 2, the inner needle 67 becomes removable from the outer needle 6.

  At this time, as shown in FIG. 11, the pair of stoppers 71 b of the needle holding member 70 comes into contact with the edge of the first restriction hole 46 in the first member 43. Thereby, it is possible to prevent the needle holding member 70 from falling out of the housing 41 and to adjust the depth to which the outer needle 6 is punctured.

  Further, the first guide piece 86 and the second guide piece 87 of the needle holding member 70 slide on one surface of the first guide wall 63 and the second guide wall 64 provided in the internal space 61 of the second member 44. Further, as shown in FIG. 12, the first pressing receiving portion 82 a of the first arm portion 76 contacts the inner wall of the first pressing portion 56 of the second member 44, and the second pressing receiving portion 84 a of the second arm portion 77. Contacts the inner wall of the second pushing portion 57 of the second member 44. Thereby, the needle holding member 70 can be moved straight along the puncturing direction Z1, and the outer needle 6 and the inner needle 67 can be punctured straight into the living body.

  Further, as shown in FIG. 11, when the needle holding member 70 biased by the biasing member 68 moves to a predetermined position, the distal end portion of the first guide piece 86 becomes a guide recess provided in the first guide wall 63. Move to the position facing 63a. Further, the distal end portion of the second guide piece 87 moves to a position facing the opening 64 a provided in the second guide wall 64.

  And the 1st guide piece 86 and the 2nd guide piece 87 rotate centering on the connection location with the protective cover 74. FIG. Therefore, the tip portions of the first guide piece 86 and the second guide piece 87 spread to both sides in the first direction X1, the tip portion of the first guide piece 86 is inserted into the guide recess 63a, and the second guide piece 87 The tip is inserted into the opening 64a (see FIG. 17). Thereby, the engagement between the hook piece 86a of the first guide piece 86 and the spring receiving portion 72 and the engagement between the hook piece 87a of the second guide piece 87 and the spring receiving portion 72 are released. As a result, the first arm portion 76 and the second arm portion 77 are allowed to rotate, and the protective cover 74 is also allowed to move in the puncture direction Z1.

  When the first member 43 is further rotated in the direction of the arrow shown in FIG. 10, the outer flange pieces 48 b and 49 b come out of the engagement groove 25. That is, the engagement between the outer flange pieces 48b and 49b and the engagement groove 25 is released. Thereby, the puncture device 3 and the cradle device 2 can be separated.

FIG. 14 is a schematic diagram showing operations of the inner needle 67 and the outer needle 6 in the puncturing operation described above.
As shown in FIG. 14A, the inner needle 67 is inserted into the cylindrical hole 6 a of the outer needle 6. Then, the outer needle 6 approaches the living body M1 together with the inner needle 67.

  Next, as shown in FIG. 14B, the needle tip 67a of the inner needle 67 is pierced into the surface of the living body M1, and the inner needle 67 is pierced into the living body M1. The outer needle 6 is also punctured into the living body M1 together with the inner needle 67. Next, as shown in FIG. 13, the puncture device 3 is separated from the cradle device 2, whereby the inner needle 67 is removed from the cylindrical hole 6 a of the outer needle 6 as shown in FIG. 14C. And as shown to FIG. 14D, the outer needle 6 remains in the state punctured to the biological body M1. Thereby, the puncture operation of the outer needle 6 using the puncture unit 7 is completed.

3. Separation operation of puncture unit As shown in FIG. 13, the puncture device 3 is lifted toward one side in the puncture direction Z1. Here, since the first arm portion 76 and the second arm portion 77 are allowed to rotate, the first arm portion 76 and the second arm portion 77 are slightly rotated by their own weight. Thereby, the 1st holding piece 75a and the 2nd holding piece 75b of the holding part 75 space apart. As a result, the gripping of the connection port 5 and the needle receiving portion 38 by the gripping portion 75 is released, and the connection port 5 and the needle receiving portion 38 are removed from the gripping portion 75. Then, the puncture device 3 is separated from the cradle device 2, and the connection port 5 for holding the outer needle 6 punctured by the living body remains in the fitting portion 24 of the cradle device 2.

4). FIG. 15 is a perspective view showing a state in which the first member 43 is further rotated, FIG. 16 is a cross-sectional view taken along line S2-S2 shown in FIG. 15, and FIG. It is sectional drawing cut | disconnected by the L3-L3 line shown.

  As shown in FIG. 15, when the slide operation portion 47 and the finger hook portion 60 are picked and the first member 43 is further rotated, the first cam pin 56a of the second member 44 comes into contact with the first cam piece 48a, and the second The cam pin 57a contacts the second cam piece 49a. Further, the locking protrusion 58 of the second member 44 approaches the locking receiving portion 50 of the first member 43.

  As shown in FIG. 16, when the first cam pin 56a abuts on the first cam piece 48a, the first pushing portion 56 is elastically deformed and pushed into the support portion 52. When the first pushing portion 56 is pushed into the support portion 52, the first pushing receiving portion 82 a of the first arm portion 76 is pushed by the first pushing portion 56. As a result, the first rotation piece 81 and the second rotation piece 82 of the first arm portion 76 rotate, and the folded first arm portion 76 spreads toward the other side in the puncture direction Z1.

  Similarly, when the second cam pin 57a comes into contact with the second cam piece 49a, the second pushing portion 57 is elastically deformed and pushed into the support portion 52. When the second pushing portion 57 is pushed into the support portion 52, the second pushing receiving portion 84 a of the second arm portion 77 is pushed by the second pushing portion 57. As a result, the first rotating piece 83 and the second rotating piece 84 of the second arm part 77 rotate, and the folded second arm part 77 spreads toward the other side in the puncture direction Z1.

  As the first arm portion 76 and the second arm portion 77 expand toward the other side in the puncturing direction Z1, the protective cover 74 moves away from the spring receiving portion 72 and moves to the other side in the puncturing direction Z1.

  Further, as shown in FIG. 17, the first guide piece 86 slides in the guide recess 63a of the first guide wall 63 toward the other side in the puncture direction Z1. The second guide piece 87 is inserted into the opening 64a of the second guide wall 64 and slides in the opening 64a toward the other side in the puncture direction Z1. Thereby, the protective cover 74 can be moved straight toward the other side of the puncture direction Z1.

  18 is a perspective view showing a state in which the first member 43 is further rotated, and FIG. 19 is a cross-sectional view taken along line S3-S3 shown in FIG.

  As shown in FIG. 18, when the slide operation portion 47 and the finger hook portion 60 are picked and the first member 43 is further rotated, the latch receiving portion 50 of the first member 43 gets over the latch protrusion 58 and engages. Locked to the stop protrusion 58. Thereby, the movement of the first member 43 in the direction opposite to the direction of the arrow is restricted. Further, when the slide operation unit 47 comes into contact with a restriction protrusion 59 (see FIG. 1) provided on the second member 44, the movement of the first member 43 in the direction of the arrow is also restricted.

  Further, the first cam pin 56 a and the second cam pin 57 a abut on the first cam piece 48 a of the first cam portion 48 and the second cam piece 49 a of the second cam portion 49. Here, the 1st cam piece 48a and the 2nd cam piece 49a are approaching the edge part of the 1st member 43 toward the other side of the circumferential direction. Therefore, as shown in FIG. 19, the first pushing portion 56 and the second pushing portion 57 are pushed further into the support portion 52.

  When the first pushing portion 56 is further pushed into the inside of the support portion 52, the first press receiving portion 82a is further pushed. Therefore, the first rotating piece 81 and the second rotating piece 82 of the first arm portion 76 further rotate, and the first arm portion 76 further expands toward the other side in the puncture direction Z1. Moreover, the 2nd pressing part 57 is further pushed inward of the support part 52, and the 2nd press receiving part 84a is further pressed. Therefore, the first rotating piece 83 and the second rotating piece 84 of the second arm portion 77 further rotate, and the second arm portion 77 further expands toward the other side in the puncture direction Z1.

  Then, as the first arm portion 76 and the second arm portion 77 move, the protective cover 74 faces the other side in the puncture direction Z1 until the needle tip of the inner needle 67 is stored in the protective hole 74b of the storage cylinder 74a. Move. That is, the outer circumference of the needle tip of the inner needle 67 in the radial direction is covered by the protective hole 74b. As a result, the needle tip of the inner needle 67 after use can be prevented from being punctured into the living body against the user's intention, and safety can be improved.

  The first press receiving portion 82 a and the second press receiving portion 84 a are fixed by the first pressing portion 56 and the second pressing portion 57. Therefore, it is possible to prevent the first arm portion 76 and the second arm portion 77 from being folded back to the state shown in FIG. Further, the tip of the first guide piece 86 is locked to the other end of the guide recess 63a in the puncture direction Z1. Thereby, the movement in the direction which approaches the spring receiving part 72 in the protective cover 74, ie, the movement to the one side of the puncture direction Z1, is controlled. As a result, since the needle tip of the inner needle 67 is not exposed from the protective cover 74 again, the used inner needle 67 can be maintained in a safer state.

  Further, according to the puncture unit 7 of the present example, the first member 43 is rotated along the head of the second member 44, so that the puncture operation of the outer needle 6 and the puncture device 3 and the cradle device 2 are separated. And the cover operation | movement of the inner needle 67 after use can be performed. That is, the puncture operation, separation operation, and cover operation of the inner needle 67 after use can all be performed by the same operation of picking the slide operation portion 47 and the finger hook portion 60. Thereby, all operations can be performed with one hand, and a puncture unit and a drug solution administration unit excellent in convenience during use can be provided.

  The present invention is not limited to the embodiment described above and shown in the drawings, and various modifications can be made without departing from the scope of the invention described in the claims. For example, in order to expand the folded first arm portion 76 and second arm portion 77, a protective bias that biases the protective cover 74 to the other side in the puncture direction Z1 between the spring receiving portion 72 and the protective cover 74. A member may be provided. In this case, when the puncture device 3 and the cradle device 2 are disengaged, the puncture device 3 can be separated from the cradle device 2 by the urging force of the protective urging member. As a result, the puncture operation, the separation operation, and the cover operation of the inner needle after use can be performed more easily.

  DESCRIPTION OF SYMBOLS 1 ... Chemical solution administration unit, 2 ... Cradle apparatus, 3 ... Puncture device, 4 ... Chemical solution administration device, 5 ... Connection port, 6 ... Outer needle, 6a ... Tube hole, 7 ... Puncture unit, 12 ... Drug solution storage part, 15 ... Liquid-feeding port, 21 ... Placement surface part, 22 ... Protection wall, 23 ... Side wall, 24 ... Fitting part, 24a ... Through hole, 25 ... Engaging groove, 41 ... Housing, 42 ... Puncture mechanism, 43 ... First Member 44... Second member 46. First restriction hole (regulation part) 46 a key groove 47 slider operation part 48 first cam part 48 b outer flange piece 49 second cam part 49a ... second cam piece 49b ... outer flange piece 50 ... lock receiving part 51 ... head part 52 ... support part 53 ... second regulating hole 54 ... spring receiving part 56 ... first pushing part, 56a ... 1st cam pin, 57 ... 2nd pushing part, 57a Second cam pin, 58 ... Locking projection, 60 ... Finger hook, 61 ... Inner space, 63 ... First guide wall, 64 ... Second guide wall, 66 ... Mounting recess, 67 ... Inner needle, 68 ... Biasing member, 70 ... Needle holding member, 71 ... Insertion part, 71a ... Key projection (regulation part), 72 ... Spring receiving part, 73 ... Needle holding part, 74 ... Protection cover, 74b ... Protection hole, 76 ... First arm part, 77 2nd arm part, 81, 83 ... 1st rotation piece, 82, 84 ... 2nd rotation piece, 82a ... 1st press receiving part, 84a ... 2nd press receiving part, 86 ... 1st guide piece, 87 ... 2nd guide piece, X1 ... 1st direction, Y1 ... 2nd direction, Z1 ... Puncture direction

Claims (6)

A cradle device that can be attached to the surface of a living body;
An outer needle that penetrates the living body through the cradle device;
A puncture device that is detachably attached to the cradle device, punctures the outer needle into the living body, and attaches the outer needle to the cradle device,
The puncture device is
A housing detachably attached to the cradle device;
A puncture mechanism for puncturing the living body with the outer needle and attaching the outer needle to the cradle device,
The puncture mechanism is
An inner needle that is removably inserted into the cylindrical hole of the outer needle and has a needle tip that can puncture the living body;
A needle holding portion for holding the inner needle;
A protective cover that is arranged so as to cover the periphery of the needle tip of the inner needle and stores the needle tip of the inner needle;
An arm for moving the protective cover from a position where the needle tip of the inner needle is exposed to a position for storing the needle tip of the inner needle;
A biasing member that biases the outer needle, the inner needle, the needle holding portion, the protective cover, and the arm portion in a direction to puncture the living body;
The puncture device includes a puncture operation in which the outer needle and the inner needle in the puncture mechanism are punctured into the living body and the inner needle is removed from the outer needle, and a separation operation in which the casing is separated from the cradle device. A puncture unit that performs a cover operation for moving the protective cover to a position for storing the needle tip of the inner needle by the arm portion with the same operation. The housing is
A first member that movably supports the needle holding portion, the protective cover, and the arm portion;
A hollow second member that rotatably supports the first member and supports the needle holding portion, the protective cover, and the arm portion movably,
The puncture unit according to claim 1, wherein the first member has a flange portion that engages with the cradle device and can be released from the cradle device by a rotating operation. The arm portion includes a plurality of rotating pieces that support the protective cover and are folded in the inner space of the second member so as to be rotatable.
The second member has a pushing portion having a cam pin that comes into contact with a cam piece provided on the first member by the rotation of the first member.
The push-in portion presses the arm portion when the cam pin contacts the cam piece, and the protective cover spreads the plurality of rotating pieces in a direction in which the needle tip of the inner needle is housed. Item 3. The puncture unit according to item 2. The puncture unit according to claim 2, wherein the second member has a guide wall that guides a movement operation of the protective cover in the arm portion in an internal space thereof. The puncture device restricts movement of the outer needle, the inner needle, the needle holding portion, the protective cover, and the arm portion in the direction of puncturing the living body against the urging force of the urging member. Part
The restricting portion restricts movement of the outer needle, the inner needle, the needle holding portion, the protective cover, and the arm portion in the direction of puncturing the living body with the rotation of the first member. The puncture unit according to claim 2 or 3. A cradle device that can be attached to the surface of a living body;
An outer needle that penetrates the living body through the cradle device;
A puncture device that is detachably attached to the cradle device, punctures the living body with an outer needle, and attaches the outer needle to the cradle device;
A drug solution administration device that is detachably attached to the cradle device and administers a drug solution to the living body via the outer needle attached to the cradle device,
The puncture device is
A housing detachably attached to the cradle device;
A puncture mechanism for puncturing the living body with the outer needle and attaching the outer needle to the cradle device,
The puncture mechanism is
An inner needle that is removably inserted into the cylindrical hole of the outer needle and has a needle tip that can puncture the living body;
A needle holding portion for holding the inner needle;
A protective cover that is arranged so as to cover the periphery of the needle tip of the inner needle and stores the needle tip of the inner needle;
An arm for moving the protective cover from a position where the needle tip of the inner needle is exposed to a position for storing the needle tip of the inner needle;
A biasing member that biases the outer needle, the inner needle, the needle holding portion, the protective cover, and the arm portion in a direction to puncture the living body;
The puncture device includes a puncture operation in which the outer needle and the inner needle in the puncture mechanism are punctured into the living body and the inner needle is removed from the outer needle, and a separation operation in which the casing is separated from the cradle device. A chemical solution administration unit that performs a cover operation for moving the protective cover to a position for storing the needle tip of the inner needle by the arm portion by the same operation.

Images