JP6763890B2 - Puncture device - Google Patents

Description

The present invention relates to a puncture equipment comprising a puncture needle to be punctured to the biological.

Conventionally, as a device used for administering a drug solution such as insulin into a living body, a portable administration device used by adhering to the skin of a user is known. For example, Patent Document 1 describes an administration device having a cradle that can be attached to a living body, a puncture tool having a double structure including an internal needle and a cannula, and an inserter for inserting the cannula into the living body. Has been done. The inserter of the administration device includes an urging member that applies urging force to the puncture device in a direction in which the puncture device is projected from the cradle.

In the above-mentioned administration device, after the puncture tool is punctured into the living body using the inserter, the inserter is removed from the cradle with the cannula held in the cradle attached to the living body. After that, by attaching a storage unit in which a predetermined chemical solution or the like is stored to the cradle, it is possible to deliver the chemical solution into the living body via the cannula. Here, in order to continuously and stably deliver the drug solution into the living body via the cannula, the cannula needs to be reliably placed in the living body. In the administration device described above, the cannula is engaged with a protrusion provided on a portion of the cradle that holds the cannula to prevent the cannula from falling out of the cradle.

Special Table 2010-531197

However, the above-mentioned engagement between the cannula and the protrusion is made by the cannula overcoming the protrusion by utilizing a part of the urging force applied to the puncture tool when the puncture tool is punctured by the living body by the inserter. To. In the process of getting over the protrusions, the cannula is not always maintained in a vertical position with respect to the skin because it also receives force from the protrusions due to contact with the protrusions. As a result, the cannula may be punctured diagonally into the skin, or the engagement with the protrusion may be insufficient, so that the cannula may not be reliably placed in the living body. Further, the contact of the cannula with the protrusion before reaching the skin has a problem that it is difficult to predict the urging force to be applied to the puncture tool and it is difficult to design the urging member in the puncture device.

An object of the present invention is to provide a puncture equipment that can reliably cannulated to a living body.

The puncture device according to the present invention for achieving the above object accommodates a puncture needle including a main body that can be attached to the surface of a living body, a cannula, and an inner needle inserted into the cannula, and the puncture needle. A puncture mechanism that is provided in the housing and the puncture needle is projected from the main body, and then a puncture operation is performed so that the inner needle can be removed from the main body while the cannula is projected. And a fixing mechanism for fixing the cannula to the main body in a state where the puncture needle is projected from the main body. The puncture mechanism has 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 an urging force in a protruding direction for causing the puncture needle to protrude from the main body portion. It is provided with an urging member to be applied to the puncture needle holding portion. The fixing mechanism is 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. To be equipped.

The puncture device according to the present invention has a fixing mechanism for fixing the first holding portion to the main body portion in a state where the puncture needle is projected from the main body portion. The fixing mechanism includes an engaging portion that engages the first holding portion with the main body portion. Then, the engaging portion 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 of the puncture needle. As a result, the operation of projecting the puncture needle from the main body and the operation of fixing the first holding portion to the main body can be performed independently, so that the puncture needle holding portion can be operated to project the puncture needle from the main body. It is possible to avoid receiving force from the engaging portion. Then, apart from the urging force applied to the puncture needle holding portion by the urging member, a force for engaging the first holding portion with the main body portion can be independently applied to the first holding portion. Therefore, when 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 capable of reliably indwelling a cannula in a living body.

It is a perspective view which shows the puncture apparatus which concerns on embodiment. It is an exploded perspective view which shows the puncture apparatus which concerns on embodiment. FIG. 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 an exploded perspective view which shows the housing of the puncture apparatus which concerns on embodiment. FIG. 5 (A) is a perspective view showing the first member of the housing mounted on the mounting portion, and FIG. 5 (B) shows the first member of the housing mounted on the mounting portion from another angle. It is a perspective view which shows. 6 (A) is an enlarged view of the region 6A shown in FIG. 5 (A), and FIG. 6 (B) is an enlarged view of the region 6B shown in FIG. 5 (B). FIG. 7 (A) is a perspective view showing the second member of the housing attached to the mounting portion, and FIG. 7 (B) shows the second member of the housing attached to the mounting portion from another angle. It is a perspective view which shows. 8 (A) is an enlarged view of the region 8A shown in FIG. 7 (A), and FIG. 8 (B) is an enlarged view of the region 8B shown in FIG. 7 (B). It is a perspective view which shows the puncture needle holding part of the puncture apparatus which concerns on embodiment. 10 (A) is a perspective view showing a first holding portion of the puncture needle holding portion, and FIG. 10 (B) is a cross-sectional view taken along the line 10B-10B shown in FIG. 10 (A). FIG. 11 (A) is a perspective view of the second holding portion of the puncture needle holding portion, and FIG. 11 (B) shows the second holding portion in the state where the lock arm and the main member are disengaged in the second holding portion. The perspective view shown, FIG. 11 (C), is a cross-sectional view taken along the line 11C-11C shown in FIG. 11 (A). 12 (A) is an enlarged view of the region 12A shown in FIG. 11 (C), and FIG. 12 (B) is an enlarged view showing a main part in a cross section along the line 12B-12B shown in FIG. 11 (A). .. 13 (A) is a cross-sectional view taken along the line 13A-13A shown in FIG. 1, and FIG. 13 (B) is a cross-sectional view corresponding to FIG. 13 (A) in a state where the puncture needle is projected. 14 (A) is a cross-sectional view taken along the line 14A-14A shown in FIG. 1, and FIG. 14 (B) is a cross-sectional view corresponding to FIG. 14 (A) in a state where the puncture needle is projected. A cross section corresponding to FIG. 14 (A) showing a state in which the housing is separated from the main body portion in a state where the second holding portion of the puncture needle holding portion of the puncture device according to the present embodiment releases the holding of the first holding portion. It is a figure. 16 (A) is a perspective view showing the inside of the housing, and FIG. 16 (B) 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 inside the housing. is there. It is a bottom view which shows the housing. It is a perspective view which shows the 2nd member of the housing of the puncture apparatus which concerns on this embodiment. FIG. 19 (A) is a perspective view showing a housing containing the puncture needle holding portion in a state before the puncture needle protrudes, and FIG. 19 (B) shows a housing containing the puncture needle holding portion when the puncture needle protrudes. A perspective view showing the body, FIG. 19 (C) is a perspective view showing a housing containing the puncture needle holding portion after the puncture needle protrudes. FIG. 20A is a perspective view showing the relationship between the first holding portion of the puncture needle holding portion and the main body portion in the state before the puncture needle protrudes, and FIG. 20B is the first view in the state where the puncture needle protrudes. A perspective view showing the relationship between the holding portion and the main body portion, FIG. 20 (C) is an enlarged view of the region 20C in FIG. 20 (B) showing how the first holding portion and the main body portion are engaged. FIG. 21 (A) is a plan view showing a main part before the first holding part and the main body part are engaged, and FIG. 21B is a main part in a state where the first holding part and the main body part are engaged. It is a plan view which shows. 22 (A) is a perspective view of the safety cap of the puncture device according to the embodiment, and FIG. 22 (B) is a perspective view of the safety cap seen from the direction of the arrow shown in FIG. 22 (A). It is a partial perspective view which shows the puncture apparatus which concerns on embodiment with a part in cross section along line 23-23 shown in FIG. FIG. 24 (A) is a schematic view showing how the safety cap is attached to the housing of the puncture device according to the embodiment, and FIG. 24 (B) is shown in FIG. 24 (A) in a state after the safety cap is attached to the housing. It is sectional drawing along the line 24B-24B shown in. FIG. 25 (A) 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. 25 (B) shows the puncture needle holding portion in a state where the puncture needle is projected. It is a perspective view which shows the mode that the housing is rotated in order to fix a 1st holding part to a main body part. FIG. 26 (A) is a perspective view showing how the housing of the puncture device according to the embodiment is rotated in order to separate it from the main body, and FIG. 26 (B) shows the housing of the puncture device according to the embodiment. It is a perspective view which shows the state of separation from a main body part. It is a perspective view which shows the state at the time of attaching the delivery mechanism for delivering a dose 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 dose. 29 is a cross-sectional view taken along the line 29-29 of FIG. 28, FIG. 29 (A) is a view showing a state before connecting the injection part and the liquid feeding part, and FIG. 29 (B) is the injection part and the liquid feeding part. 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 attached drawings. The following description does not limit the technical scope and meaning of terms described in the claims. Also,
The dimensional ratios in the drawings are exaggerated for convenience of explanation and may differ from the 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 view mainly provided for explaining the configuration of the mounting portion 18 of the main body portion 10 of the puncture device 100. 4 to 8 are diagrams mainly used for explaining the configuration of the housing 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. Further, FIGS. 25 to 29 are diagrams for explaining a usage example of the puncture device 100.

The puncture device 100 according to the present embodiment can be used together with a predetermined delivery mechanism 200 for delivering an administration such as a drug solution (insulin) (see FIG. 27). Then, the puncture device 100 and the delivery mechanism 200 make it possible to configure an administration device for administering the 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 houses 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 is projected from the main body 10, the inner needle 22 is removed from the main body 10 while the cannula 21 is projected. It further comprises a puncture mechanism 110 that performs a puncture operation that enables it. The puncture mechanism 110 has a puncture needle holding portion 111 including a first holding portion 130 for holding the cannula 21 and a second holding portion 140 for holding the inner needle 22, and a protrusion direction Z for projecting the puncture needle 20 from the main body portion 10. An urging member 112 that applies urging force to the puncture needle holding portion 111 is provided.

As shown in FIG. 20 (C), the puncture device 100 further includes a fixing mechanism 120 for fixing the cannula 21 to the main body 10 in a state where the puncture needle 20 is projected 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. It is equipped with 150.

As shown in FIG. 1, the puncture device 100 is provided in a state where the safety cap 40 is attached to the housing 30 connected to the main body 10. The main body 10 can be attached to a desired portion in the living body where the cannula 21 is desired to be placed. When the safety cap 40 is removed, the housing 30 becomes relatively rotatable with respect to the main body 10 about the protruding direction Z of the puncture needle 20. 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 needle 20 can be punctured into the living body, the puncture needle 20 can be reliably placed in the living body, and the main body 10 can be used. The work of removing the housing 30 can be continuously performed. Therefore, the puncture device 100 has advantages such as excellent safety, convenience, and operability. The puncture device 100 will be described in detail below.

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

As shown in FIGS. 1 and 2, the main body 10 is a mounting portion to 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. It is configured as a cradle having 18. As the material constituting each part of the main body (cradle) 10, for example, a known resin material or metal material can be used.

The attachment portion 16 of the main body portion 10 is provided on the bottom surface 11 (see FIG. 2) which is arranged so as to face the skin surface layer of the living body when the device is used. The adhesive portion 16 is formed of a double-sided tape attached to the bottom surface 11 so as to extend outward from the bottom surface 11. The attachment portion 16 is not particularly limited in terms of installation location, size, shape, configuration form, etc., as long as the main body portion 10 can be configured to be adhereable to a living body. 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 portion 10 has a mounting surface 12 formed in a plane shape and a side wall 13 partially surrounding the outer periphery of the mounting surface 12. There is. On the mounting surface 12, the delivery mechanism 200 can be arranged after the housing 30 is removed from the main body 10 (see FIG. 27). An insertion hole 12a through which the puncture needle 20 can be inserted is formed on the mounting surface 12. The side wall 13 prevents the delivery mechanism 200 arranged on the mounting surface 12 from being displaced or falling off from the main body 10.

As shown in FIG. 3, in the present embodiment, the side wall 13 of the main body 10 is formed on the first side wall 13a extending in one direction along the outer periphery of the mounting surface 12 and the outer periphery of the mounting surface 12. A second side wall 13b extending in one direction intersecting along the other direction, and a third side wall 13c extending along the outer circumference of the mounting surface 12 facing the first side wall 13a. Has.

The first side wall 13a is formed with a first opening 13a1 into which the first lock claw 37a of the second member 35 of the housing 30 described later is inserted and detached. Further, 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 detached.

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 composed of, for example, a known hollow needle having a flow path formed inside. The outer diameter, inner diameter, length, etc. of the cannula 21 and the inner needle 22 may be any one as long as they can be punctured into a living body, depending on the purpose of use.

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

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

Next, the housing 30 will be described.

The housing 30 is configured to be connectable and separable to the main body 10. As shown in FIGS. 2 and 4, the housing 30 is a first member having a first member 31 for accommodating the puncture mechanism 110 and a first member with the protruding direction Z of the puncture needle 20 as an axis while covering the first member 31. It has a second member 35 that is rotatably attached relative to 31.

As shown in FIGS. 4 and 5, the first member 31 extends from the substantially cylindrical tubular body 32 and the outer peripheral surface 32a of the tubular body 32, and the first member 31 is connected to the main body portion 10. It has legs 33 that sometimes come into contact with the mounting surface 12 of the mounting portion 18. The outer peripheral surface 32a of the tubular body 32 forms a guide surface that guides the rotation of the second member 35 with respect to the first member 31 about the protrusion direction Z of the puncture needle 20.

With reference to FIGS. 5 and 6, the legs 33 have a first recess 33a into which the first side wall 13a of the mounting portion 18 is inserted while the first member 31 is connected to the mounting portion 18. 1 The member 31 is provided with a second recess 33b into which the second side wall 13b of the mounting portion 18 is inserted while the 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 restricted 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 restricted 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 mounting surface 12 and the movement in the rotation direction about the direction intersecting the surface direction of the mounting surface 12 are restricted. Will be done.

As shown in FIGS. 4 and 7, the second member 35 includes a substantially cylindrical first tubular body 36 having an inner diameter substantially equal to or slightly larger than the outer diameter of the tubular body 32 of the first member 31. The two members 35 are arranged closer to the mounting portion 18 than the first cylinder 36 in a state of being connected to the mounting portion 18, and have an outer diameter larger than the outer diameter of the first cylinder 36. Penetration into the cylindrical second cylinder 37, the connecting portion 38 connecting the first cylinder 36 and the second cylinder 37, and the first cylinder 36 and the second cylinder 37. It has a knob portion 39 for applying a rotational force about the protrusion direction Z of the needle 20. By applying a rotational force to the knob portion 39, the inner peripheral surface of the first tubular body 36 of the second member 35 is guided by the outer peripheral surface 32a of the tubular body 32 of the first member 31. The two members 35 rotate relative to the first member 31.

With reference to FIGS. 7 and 8, in the second tubular body 37, a first lock claw that inserts and detaches the mounting portion 18 into and detaches from the first opening 13a1 according to the rotation of the second member 35. It has 37a and a second lock claw 37b in which the mounting portion 18 is inserted into and detached from the second opening 13b1 according to the rotation of the second member 35. The first lock claw 37a and the second lock claw 37b have an arc shape extending along the outer peripheral surface 37c of the second tubular body 37. By inserting and detaching the first lock claw 37a and the second lock claw 37b into the first opening 13a1 and the second opening 13b1 of the mounting portion 18, respectively, in the direction intersecting the surface direction of the mounting surface 12. The movement of the second member 35 can be restrained and the restraint 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 the puncture needle holding portion 111 holding the puncture needle 20 and the urging force of the puncture needle 20 in the protruding direction Z to the puncture needle holding portion 111. It includes an urging member 112.

The puncture needle holding portion 111 has a first holding portion 130 for holding the cannula 21 and a second holding portion 140 for holding the inner needle 22. The puncture needle holding portion 111 is housed in the housing 30 in a state of being movable in the protruding direction Z of the puncture needle 20.

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

The base portion 131 is a portion serving as a base of the first holding portion 130, and is formed in a substantially cylindrical shape in the present embodiment. The base 131 is provided with an internal space 131a in which the cannula 21 is installed, and the internal space 131a is configured to have a funnel shape in accordance with the shape of the cannula 21 so as to support the cannula 21. A recess 136 with which the arm 143 of the second holding portion 140 of the puncture mechanism 110 engages is provided on the outer peripheral portion of the base portion 131.

The connection port 132 extends in the base 131 in a direction intersecting 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 made of a material having the following properties. That is, (i) the liquid feed pipe 222 that supplies the chemical liquid from the outside of the first holding portion 130 can be inserted, and (ii) the liquid-tight between the inserted liquid feed pipe 222 and the connection port 132. The hole formed in the cap 133 by being able to be maintained and (iii) being inserted into the liquid feed pipe 222 is formed of a material having the property of being closed after the liquid feed pipe 222 is removed. Is preferable. Examples of the material having such characteristics include rubber and the like.

The lid member 134 has a function of pressing the seal member 135. The lid member 134 is formed with a through hole 137 through which the inner needle 22 can be inserted, 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 insulin from leaking from the through hole 137 after the inner needle 22 is removed from the through hole 137. Examples of the material of the sealing member 135 include rubber and the like.

As shown in FIGS. 11A and 12, the second holding portion 140 has a plate-like shape that is separated from the main member 141 that holds the inner needle 22 and the main member 141 in the protruding direction Z of the inner needle 22. It has an auxiliary member 142 and a pair of arms 143 that are rotatably connected to the auxiliary member 142 to sandwich the first holding portion 130. The second holding portion 140 sets a distance h between the pair of connecting members 144 connecting each of the pair of arms 143 and the main member 141, and the main member 141 and the auxiliary member 142 in the protruding direction Z of the inner needle 22. It further has a lock arm 145 that is maintained at a predetermined size.

As shown in FIG. 12A, the main member 141 has a plate-shaped base material 141a and a holding portion 141b for holding the inner needle 22. The holding portion 141b has a cylindrical shape and protrudes from a surface of the base material 141a different from the surface facing the auxiliary member 142. The method of 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 adhered by an adhesive.

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

The connecting member 144 connects the portion 143c of the arm 143 where the engaging claw 143a is provided and the portion 143c different from the connecting portion 143b connected to the sub-member 142 to the main member 141. 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, torque applied to the arm 143 with the connection portion 143b as a fulcrum is applied by the force applied from the connecting member 144. Be done. As a result, the arm 143 rotates with the connection point 143b as a fulcrum.

As shown in FIG. 12A, the lock arm 145 includes an engaging claw 145c that is rotatably connected to the sub-member 142 at one end 145a and engages the main member 141 at the other end 145b. By engaging the engaging claw 145c of the lock arm 145 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 with the connection point 143b connected to the auxiliary member 142 as the fulcrum of the arm 143 is restricted. As a result, it is possible to prevent the arm 143 from releasing the holding of the first holding portion 130 at an unintended timing.

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

As shown in FIG. 13, in the present embodiment, the tubular body 32 of the first member 31 of the housing 30 has a support portion 32b that supports one end 112a of the urging member 112 and a protruding direction of the puncture needle 20. A protrusion 32c that regulates the movement of the urging member 112 in the direction intersecting Z is further provided.

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 112b different from the end portion 112a supported by the supporting portion 32b in the urging member 112. A support portion 144a for supporting the above is provided.

As shown in FIGS. 13A and 14A, the urging member 112 is supported between the support portion 32b on the housing 30 side and the support portion 144a on the puncture needle holding portion 111 side. Since the puncture needle holding portion 111 is housed in the housing 30 in a state of being movable in the protruding direction Z of the puncture needle 20, the support portion 32b on the housing 30 side and the support portion 144a on the puncture needle holding portion 111 side The distance between them can be shorter than the natural length of the urging member 112. By making 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 shorter than the natural length of the urging member 112, the support portion 32b on the housing 30 side and the puncture needle A puncture force is applied to each of the support portions 144a on the holding portion 111 side from the puncture member 112.

As described above, in the state where the housing 30 is connected to the main body 10, the movement of the housing 30 in the protruding direction Z of the puncture needle 20 is restricted. 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 portion 111 is in a movable state in the protruding direction Z of the puncture needle 20 while being housed in the housing 30. Therefore, the puncture needle holding portion 111 moves toward the protruding direction Z of the puncture needle 20 by the urging force applied from the urging member 112 to the support portion 144a on the puncture needle holding portion 111 side. As a result, as shown in FIGS. 13B and 14B, the puncture needle 20 passes through the insertion hole 12a formed in the mounting surface 12 of the main body 10 and protrudes from the main body 10.

As shown in FIGS. 16 and 17, in the present embodiment, the tubular body 32 of the first member 31 of the housing 30 guides the movement of the puncture needle holding portion 111 along the protrusion direction Z of the puncture needle 20. A groove 32d is further provided. The puncture needle holding portion 111 is housed in the housing 30 in a state where the side surface 143d (see FIG. 11A) of the arm 143 of the second holding portion 140 faces the side surface 32e of the guide groove 32d. The puncture needle holding portion 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 portion 140 is guided by the side surface 32e of the guide groove 32d. To do.

As shown in FIGS. 13 and 16, the tubular 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 portion 140, whereby each of the pair of lock arms 145. The lock wall 32f is provided so as to be engaged with the main member 141 of the second holding portion 140. The lock wall 32f abuts on 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). Then, in a state where 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 tubular body 32 of the first member 31 of the housing 30 is provided with the lock wall 32f, each of the pair of lock arms 145 is engaged with the main member 141 of the second holding portion 140 in the state before the puncture needle 20 protrudes. The matched state is maintained. As a result, the state in which the arm 143 of the second holding portion 140 sandwiches the first holding portion 130 is maintained in the state before the puncture needle 20 protrudes.

On the other hand, the lock wall 32f releases the state in which the puncture needle 20 protrudes from the main body 10 and is in contact with each of the pair of lock arms 145. As a result, each of the pair of lock arms 145 of the second holding portion 140 is released from being engaged with the main member 141 of the second holding portion 140, so that the main member 141 and the secondary member 141 in the protruding direction Z of the inner needle 22 are released. The distance h between the member 142 and the member 142 becomes larger than a predetermined size. Therefore, the state in which the arm 143 of the second holding portion 140 sandwiches the first holding portion 130 is released. As a result, as shown in FIG. 15, the housing 30 can be separated from the main body 10 while the first holding portion 130 is left in the main body 10.

With reference to FIG. 9 again, the puncture mechanism 110 further includes a regulating portion 113 that regulates the movement of the puncture needle holding portion 111 against the urging force applied by the urging member 112. Then, the regulation by the regulation unit 113 is released in conjunction with the operation in which the housing 30 rotates relative to the main body portion 10 about the protrusion direction Z of the puncture needle 20.

The regulating unit 113 punctures against the urging force applied by the urging member 112 and the first regulating unit 113a that keeps the puncture needle 20 in a non-protruding state against the urging force applied by the urging member 112. It has a second regulating portion 113b that keeps 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 portion 140 further has a support column 141d protruding from a surface different from the surface of the main member 141 facing the sub-member 142. .. The first regulating portion 113a has a shape in which the inner needle 22 projects in pairs in different directions from the outer peripheral surface 141e of the support column 141d along one direction intersecting the protruding direction Z of the inner needle 22. Further, the second regulating portion 113b protrudes in pairs from the outer peripheral surface 141e of the support column 141d along the direction intersecting the protruding direction Z of the inner needle 22 and the protruding direction of the first regulating portion 113a. It has a shape. The second regulating portion 113b is formed on the outer peripheral surface 141e of the support column 141d so as to be separated from the first regulating portion 113a in a direction different from the protruding direction Z of the puncture needle 20.

On the other hand, as shown in FIG. 18, a recess 39a 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. Then, the recess 39a abuts on the first regulation portion 113a and the second regulation portion 113b to regulate the movement of the first regulation portion 113a and the second regulation portion 113b in the protruding direction Z of the puncture needle 20. Is provided at the bottom of the recess 39a.

A keyhole 39c is formed on the regulation surface 39b so that the first regulation portion 113a can be moved. When the housing 30 accommodating the puncture needle holding portion 111 is viewed in a plan view from the protruding direction Z of the puncture needle 20, the contour of the first regulating portion 113a, the contour of the second regulating portion 113b, and the contour of the keyhole 39c are It has substantially the same shape.

As shown in FIG. 19A, the first regulating portion 113a is in contact with the regulating surface 39b in a state where the puncture needle 20 does not protrude. At this time, the position of the keyhole 39c formed on the regulation surface 39b and the position of the first regulation portion 113a are different from each other. As a result, the puncture needle holding portion 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 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, it is formed on the regulation surface 39b. The position of the keyhole 39c coincides with the position of the first regulation unit 113a. As a result, the first regulating portion 113a can pass through the keyhole 39c and move in the protruding direction Z of the puncture needle 20. 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. 13 (B) and 14 (B)).

As shown in FIG. 19C, the second regulating portion 113b comes into contact with the regulating surface 39b in a state where the puncture needle 20 is projected. At this time, since the protruding direction of the second regulating section 113b intersects the protruding direction of the first regulating section 113a, the position of the second regulating section 113b and the position of the keyhole 39c are different from each other. Therefore, the second regulating portion 113b does not pass through the keyhole 39c when the puncture needle 20 is projected. As a result, when the puncture needle 20 is projected, the puncture needle holding portion 111 to which the puncture force is applied by the urging member 112 is restricted from moving in the protrusion direction Z of the puncture needle 20. As a result, it is possible to prevent the puncture needle 20 from protruding more than necessary.

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

As shown in FIGS. 20 (C) and 21, the fixing mechanism 120 has the first holding portion 130 as the first holding portion 130 moves relative to the main body portion 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 portion 150 includes a first engaging portion 151 provided on the first holding portion 130 side and a second engaging portion 152 provided on the main body portion 10 side and engaged with the first engaging portion 151. Be prepared.

In the present embodiment, the first engaging portion 151 is provided so as to project in pairs in different directions from the outer peripheral surface of the base 131 of the first holding portion 130 along the direction intersecting the protruding direction Z of the puncture needle 20. Be done. The first engaging portion 151 includes a base 151a projecting from the outer peripheral surface of the base 131 of the first holding portion 130, and an engaging claw 151b provided so as to project from the base 151a along the outer peripheral surface of the base 131. Have. The second engaging portion 152 is based on a base 152a projecting from the mounting surface 12 in a direction opposite to the projecting direction Z of the puncture needle 20 and a direction intersecting the projecting 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 portion 151 of the first holding portion 130 in a state where the puncture needle 20 protrudes.

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

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

In the present embodiment, as shown in FIGS. 18 and 19 (C), the recess 39a of the second member 35 of the housing 30 has a second regulation formed in the second holding portion 140 of the puncture needle holding portion 111. By pressing the portion 113b, a protrusion 39d is provided that exerts a rotational force on the second holding portion 140 about the protrusion direction Z of the puncture needle 20.

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

Since the second member 35 has the protrusion 39d, the second holding portion 140 is rotated by the operation of rotating the second member 35 relative to the first member 31 in the state where the puncture needle 20 is projected. .. 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 engaging claw 152b of the second engaging portion 152 provided on the main body 10 side are engaged with each other.

The engaging portion 150 that engages the first holding portion 130 with the main body portion 10 is fixed as the first holding portion 130 moves relative to the main body portion 10 in a direction different from the protruding direction Z. The mechanism 120 provides 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 portion 130 to the main body 10 can be performed independently, in the operation of projecting the puncture needle 20 from the main body 10. It is possible to prevent the puncture needle holding portion 111 from receiving a force from the engaging portion 150. Then, apart from the urging force applied to the puncture needle holding portion 111 by the urging member 112, a force for engaging the first holding portion 130 with the main body portion 10 can be independently applied to the first holding portion 130. Therefore, the first holding portion 130 that holds the puncture needle 20 can be reliably fixed to the main body portion 10 in a state where the puncture needle 20 protrudes from the main body portion 10.

In the present embodiment, the housing 30 is connected to the main body 10 with the protruding direction Z of the puncture needle 20 as the axis in a state where the main body 10 and the first holding portion 130 are engaged in the engaging portion 150. Is released by rotating relative to the main body 10.

With reference to FIGS. 7 and 8, the first lock claw 37a and the second lock claw 37b of the second member 35 of the housing 30 have the main body portion 10 and the first holding portion 130 in the engaging portion 150. A predetermined length so that the second member 35 is separated from the first opening 13a1 and the second opening 13b1 of the side wall 13 of the main body 10 by rotating relative to the main body 10 in the engaged state. Is formed with.

Since the first lock claw 37a and the second lock claw 37b have a predetermined length, the connection between the housing 30 and the main body portion 10 is made between the main body portion 10 and the first holding portion in the engaging portion 150. The housing 30 is released by rotating relative to the main body 10 in a state of being engaged with the 130. As a result, the first holding portion 130 is fixed to the main body portion 10 and the housing 30 and the main body portion 10 are connected by a simple one-time operation of rotating the housing 30 relative to the main body portion 10. Cancellation can be performed continuously.

Further, from another point of view, the first lock claw 37a and the second lock claw 37b have a second lock claw 37a until the main body portion 10 and the first holding portion 130 are engaged with each other in the engaging portion 150. The lock claw 37a of 1 and the second lock claw 37b have a length for maintaining the state of being inserted into the first opening 13a1 and the second opening 13b1. As a result, it is possible to prevent the housing 30 and the main body 10 from being disconnected before the main body 10 and the first holding portion 130 are engaged in the engaging portion 150.

Next, the safety cap 40 will be described.

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

The protrusion 40a is inserted between the wall surface 39e of the recess 39a of the second member 35 and the second regulating portion 113b of the second holding portion 140 of the puncture needle holding portion 111 with respect to the first member 31 of the second member 35. Rotation is regulated. This makes it possible to prevent the housing 30 from rotating relative to the main body 10 at an unintended timing.

With reference to FIG. 24, 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 10. The safety cap 40 includes an engaging claw 40b that engages with the first member 31 of the housing 30. With reference to FIG. 4, the leg 33 of the first member 31 of the housing 30 is provided with an opening 33c with which the engaging claw 40b of the safety cap 40 is engaged. With reference to FIG. 24, the safety cap 40 is attached to the housing 30 by engaging the engaging claw 40b of the safety cap 40 with the opening 33c.

Next, an example of using the puncture device 100 will be described with reference mainly to FIGS. 25 to 29.

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

Next, the safety cap 40 attached to the housing 30 is removed. As a result, the second member 35 of the housing 30 becomes rotatable with respect to the first member 31.

Next, as shown in FIG. 25 (A), the first lock claw 37a and the second lock claw 37b of the second member 35 are separated from the first opening 13a1 and the second opening 13b1 of the mounting portion 18. The knob portion 39 is used to rotate the second member 35 relative to the first member 31 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 keyhole 39c formed in the recess 39a of the second member 35 and in the support column 141d of the second holding portion 140 of the puncture needle holding portion 111. This is performed until the position of the first regulation unit 113a is aligned (see FIG. 19B). When the position of the keyhole 39c and the position of the first regulating portion 113a match, the restriction on the 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 ( 13 (B) and 14 (B)).

Next, as shown in FIG. 25 (B), the first lock claw 37a and the second lock claw 37b of the second member 35 move 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 protrusion 39d formed in the recess 39a of the second member 35 presses the second regulating portion 113b formed on the support column 141d of the second holding portion 140 of the puncture needle holding portion 111 (FIG. 19 (FIG. 19). See C)). As a result, the puncture needle holding portion 111 is rotated about the protrusion direction Z of the puncture needle 20.

Next, with the operation of rotating the puncture needle holding portion 111 about the protrusion direction Z of the puncture needle 20, the first engaging portion 151 and the main body portion 10 of the first holding portion 130 of the puncture needle holding portion 111 Engage with the second engaging portion 152 (see FIG. 20C). As a result, the first holding portion 130 is fixed to the main body portion 10. By fixing the first holding portion 130 to the main body portion 10, the cannula 21 is securely placed in the living body while being held by the first holding portion 130.

Next, with reference to FIG. 26 (A), the first member 31 is directed toward the direction in which the first lock claw 37a and the second lock claw 37b are separated from the first opening 13a1 and the second opening 13b1. The second member 35 is rotated further relative to the relative. Then, the first lock claw 37a and the second lock claw 37b are separated from the first opening 13a1 and the second opening 13b1. As a result, the restraint on the movement of the second member 35 in the direction intersecting the surface direction of the mounting surface 12 is released.

Next, referring to FIG. 26B, 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, the safety cap 40 is mounted on the housing by engaging the engaging claw 40b formed on the safety cap 40 with the opening 33c formed on the leg 33 of the first member 31 of the housing 30. Attached to No. 30 (see FIGS. 4 and 24 (B)). As a result, it is possible to prevent erroneous puncture by the puncture needle 20 after the housing 30 is separated from the main body 10.

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

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

As described above, after the housing 30 is removed from the main body 10, the first holding portion 130 is left in the main body 10. By connecting the delivery mechanism 200 for administering a predetermined dose to the first holding portion 130, the inside of the cannula 21 is formed through the lumen 132a of the connection port 132 of the first holding portion 130 and the internal space 131a of the base 131. Can be delivered to. As a result, the administration material 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 it is configured to be able to deliver a predetermined dose to the cannula 21, but is necessary for the liquid delivery operation, for example, as shown in FIGS. 27 and 28. A liquid feeding reuse unit 210 including a driving mechanism 211 and the like for generating a driving force for driving a member and a liquid feeding disposable unit 220 including a drug solution storage unit 221 filled with insulin and the like are used.

The liquid feeding reuse unit 210 and the liquid feeding disposable unit 220 are configured to be connectable and separable. If insulin, etc. in the drug solution storage unit is used up after use for a predetermined period, separate the liquid supply reuse unit 210 and the liquid supply disposable unit 220, dispose of the liquid supply disposable unit 220, and replace it with a new one. Can be done. On the other hand, the liquid feeding reuse unit 210 is equipped with relatively expensive components such as the motor 211a and the gear 211b, which will be described later, which are replaced less frequently than the components mounted on the liquid feeding disposable unit 220. In this way, the components that are discarded after being used for a predetermined period and the relatively expensive components are mounted in different housings, and the relatively expensive components can be mounted on the liquid feed reuse unit 210 and reused. By doing so, it is possible to reduce the manufacturing cost of the device and the cost associated with its use.

The liquid feed reuse unit 210 includes a drive mechanism 211 for driving a member necessary for performing a liquid feed operation, a control unit 212 for controlling the drive mechanism 211, and a first housing 213 for holding these. In FIG. 28, the portion surrounded by the dotted line X represents a part attached to the liquid feed reusable portion 210, and the portion surrounded by the alternate long and short dash line Y represents a part attached to the liquid feed disposable portion 220. In FIG. 28, the first housing 213 is omitted for ease of understanding.

The drive mechanism 211 is attached to a motor 211a having an output shaft that causes rotation by electric power from the battery 224 of the liquid feeding disposable unit 220, and an extrusion mechanism 223 of the liquid feeding disposable unit 220 that decelerates the rotation generated by the motor 211a. It has a plurality of gears 211b for transmission.

As shown in FIG. 28, the liquid feeding disposable unit 220 includes a drug solution storage unit 221 filled with a drug solution (insulin or the like) as an administration, a cavity 132a of a connection port 132 of the first holding unit 130, and a drug solution storage unit. A liquid feed pipe 222 that communicates with 221, an extrusion mechanism 223 that is mechanically connected to the drive mechanism 211 and pushes insulin in the drug solution storage unit 221 to the liquid feed pipe 222, and a battery that supplies electric power to the drive mechanism 211 and the like. It has a 224 and a second housing 225 that holds them. The administration is not limited to the drug solution, and may be any substance as long as it is intended for administration into the living body, and the state at the time of administration is liquid, gas, or solid (for example, powder). , Granular material), gel and the like.

The liquid feed tube 222 is composed of, for example, a thin metal tube having a sharp tip shape. In the case of such a configuration, as shown in FIG. 29 (A), when the sending mechanism 200 is connected to the main body 10 while sliding the sending mechanism 200 with respect to the main body 10, the drawing mechanism 200 is shown in FIG. 29 (B). As shown, the sharp tip of the liquid feed pipe 222 penetrates the cap 133 of the first holding portion 130, and the liquid feed pipe 222 is inserted into the lumen 132a of the connection port 132. That is, while performing the work of connecting the delivery mechanism 200 to the main body 10, the liquid feed pipe 222 and the connection port 132 are connected, and the assembly work is performed so that the chemical solution can be fed to the first holding portion 130. be able to.

As shown in FIG. 28, the extrusion mechanism 223 has a slide portion 226 that can move forward and backward in the internal space of the chemical storage section 221 and a feed screw that engages with a female screw formed in the slide portion 226 to move the slide portion 226 forward and backward. It includes a 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 portion 226 is a feed plate formed with an extrusion member 226a that can move forward and backward in the chemical storage portion 221 while maintaining a sealing property so that the chemical liquid does not leak to the slide portion 226 side, and a female screw that meshes with the feed screw 227. It has a 226b and a connecting plate 226c that connects the extrusion member 226a and the feed plate 226b.

After connecting the liquid feed pipe 222 and the connection port 132, the feed screw 227 rotates via the gear 211b of the drive mechanism 211 and the gear 223c of the extrusion 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 spiral axis of the male screw of the feed screw 227. The extrusion member 226a connected to the feed plate 226b via the connecting plate 226c moves in the chemical storage section 221 as the feed plate 226b moves. When the extrusion member 226a moves in the direction of being pushed into the chemical storage section 221 (the direction in which the volume of the storage space decreases), the administration material in the storage space formed by the chemical storage section 221 and the extrusion member 226a is transferred to the liquid delivery pipe 222. Is sent to. Insulin delivered to the liquid delivery tube 222 is introduced into a living body (indicated by reference numeral P in FIG. 29) via the lumen 132a of the connection port 132, the internal space 131a of the base 131, and the cannula 21.

In this way, the puncture device 100 from which the housing 30 has been removed and the predetermined delivery mechanism 200 can constitute an administration device for administering the administration substance into the living body, and the administration device can be used to administer the administration substance. Will be able to do.

As described above, the puncture device 100 according to the present embodiment has a fixing mechanism 120 for fixing the first holding portion 130 to the main body portion 10 in a state where the puncture needle 20 is projected from the main body portion 10. The fixing mechanism 120 includes an engaging portion 150 that engages the first holding portion 130 with the main body portion 10. Then, the engaging portion 150 moves the first holding portion 130 relative to the main body 10 in a direction different from the protruding direction Z of the puncture needle 20. Engage in. As a result, the operation of projecting the puncture needle 20 from the main body 10 and the operation of fixing the first holding portion 130 to the main body 10 can be performed independently, so that the operation of projecting the puncture needle 20 from the main body 10 can be performed independently. It is possible to prevent the puncture needle holding portion 111 from receiving a force from the engaging portion 150. Then, apart from the urging force applied to the puncture needle holding portion 111 by the urging member 112, a force for engaging the first holding portion 130 with the main body portion 10 can be independently applied to the first holding portion 130. Therefore, the first holding portion 130 that holds the puncture needle 20 can be reliably fixed to the main body portion 10 in a state where the puncture needle 20 protrudes from the main body portion 10. Therefore, it is possible to provide a puncture device capable of reliably indwelling a cannula in a living body.

Further, according to the puncture device 100, the engaging portion 150 is provided on the first engaging portion 151 provided on the first holding portion 130 side and the main body portion 10 side, and engages with the first engaging portion 151. A second engaging portion 152 is provided. Thereby, the first holding portion 130 can be engaged with the main body portion 10 by a simple configuration. Therefore, the manufacturing of the puncture device becomes easy.

Further, according to the puncture device 100, in the engaging portion 150, the first holding portion 130 and the main body portion 10 have the first holding portion 130 relative to the main body portion 10 about the protrusion direction Z of the puncture needle 20. Engage by rotating. As a result, the first holding portion 130 can be engaged with the main body portion 10 by a simple operation of rotating the first holding portion 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 separable from the main body 10 by rotating relative to the main body 10. Then, in the engaging portion 150, the first holding portion 130 and the main body portion 10 are interlocked with the operation in which the housing 30 rotates relative to the main body portion 10 about the protrusion direction Z of the puncture needle 20. The first holding portion 130 engages by rotating relative to the main body portion 10. Further, in the connection between the main body 10 and the housing 30, the housing 30 is the main body about the protruding direction Z of the puncture needle 20 in the state where 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 portion 10. As a result, the first holding portion 130 is fixed to the main body portion 10 and the housing 30 and the main body portion 10 are connected by a simple one-time operation of rotating the housing 30 relative to the main body portion 10. Cancellation can be performed continuously. Therefore, the operability when using the puncture device is further improved.

Further, according to the puncture device 100, the puncture mechanism 110 further includes a regulation unit 113 that regulates the movement of the puncture needle holding unit against the urging force. Then, the regulation by the regulation unit 113 is released in conjunction with the operation in which the housing 30 rotates relative to the main body portion 10 about the protrusion direction Z. As a result, the puncture needle 20 can be punctured into the living body and the first holding portion 130 can be fixed 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 housing 30 and the main body 10 can be continuously performed. Therefore, the operability when using the puncture device is further improved.

Further, the puncture device 100 is configured to be connectable and separable to the housing 30, and further has a safety cap 40 that regulates the rotation of the housing 30 with respect to the main body 10 in a state of being connected to the housing 30. As a result, it is possible to prevent the housing 30 from rotating relative to the main body 10 at an unintended timing, thereby preventing erroneous firing of the puncture needle 20. Therefore, the safety when using the puncture device is improved.

Further, according to the puncture device 100, the safety cap 40 can be attached 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 10. To. As a result, it is possible to prevent erroneous puncture by the puncture needle 20 after the housing 30 is separated from the main body 10. Therefore, the safety when using the puncture device is further improved.

Further, according to the puncture device 100, the main body 10 is attached to the attachment portion 16 that can be attached to the living body and the attachment portion 18 to which the delivery mechanism 200 that sends a predetermined dose into the living body via the cannula 21 can be attached. A cradle with a. As a result, after the puncture work by the puncture mechanism 110 is completed, the administration can be administered using the puncture device 100, which makes the device even more convenient.

Although the puncture device according to the present invention has been described above 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 modified based on the description of the claims. Is possible.

For example, in the above-described embodiment, the first holding portion 130 and the main body portion 10 are engaged by the first holding portion 130 rotating relative to the main body portion 10 about the protrusion direction Z of the puncture needle 20. It fits. However, the operation of engaging the first holding portion with the main body portion is not limited as long as the first holding portion moves relative to the main body portion in a direction different from the protruding direction of the puncture needle. For example, in the engaging portion, the first holding portion and the main body portion are engaged with each other as the first holding portion moves relative to the main body portion in the surface direction of the mounting surface of the mounting portion. It may be configured.

Further, in the above-described embodiment, the engaging portion 150 is provided on the first engaging portion 151 provided on the first holding portion 130 side and the main body portion 10 side, and engages with the first engaging portion 151. It is configured to include 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 as the first holding portion moves relative to the main body portion in a direction different from the protruding direction. Not limited. For example, the engaging portion engages with the first engaging portion provided on the first holding portion side, the second engaging portion provided on the main body portion side, and the first engaging portion and the second engaging portion. An engaging member may be provided, and the first engaging portion and the second engaging portion may be configured to engage via the engaging member.

Further, 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 any angle including a vertical angle.

This application is based on Japanese Patent Application No. 2016-02275 filed on February 4, 2016, the disclosure of which is referenced and incorporated as a whole.

10 Main body,
12 Mounting surface,
13 side wall,
13a First side wall,
13a1 First opening,
13b second side wall,
13b1 second opening,
16 Adhesion,
18 Mounting part,
20 puncture needle,
21 Cannula,
22 Inner needle,
30 housings,
31 First member,
32 cylinder,
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 1st lock claw,
37b Second lock claw,
37c outer peripheral surface,
39 knob part,
39a recess,
39b Regulatory aspect,
39c keyhole,
39d protrusion,
39e wall surface,
40 safety cap,
40a protrusion,
40b engaging claw,
100 puncture device,
110 Puncture mechanism,
111 Puncture needle holder,
112 urging member,
113 Regulatory Department,
113a 1st Regulatory Department,
113b Second Regulatory Department,
120 fixing mechanism,
130 1st holding part,
140 Second holder,
141 main member,
141a base material,
141b holding part,
141c lumen,
141d prop,
141e outer peripheral surface,
142 Auxiliary member,
143 arm,
143a engaging claws,
144 connecting member,
144a support,
145 lock arm,
145c engaging claws,
150 engagement part,
151 First engaging part,
152 Second engaging part,
200 sending mechanism,
Z puncture needle protrusion direction,
d, h distance.

Claims (8)

The main body that can be attached to the surface of the living body
A puncture needle with a cannula and an internal needle inserted into the cannula,
A housing for accommodating the puncture needle and
A puncture mechanism provided in the housing, in which the puncture needle is projected from the main body and then a puncture operation is performed so that the inner needle can be removed from the main body while the cannula is projected.
It has a fixing mechanism for fixing the cannula to the main body portion in a state where the puncture needle is projected from the main body portion.
The puncture mechanism has 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 an urging force in a protruding direction for causing the puncture needle to protrude from the main body portion. Provided with an urging member to be attached to the puncture needle holding portion
The fixing mechanism is 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. The engaging portion includes a first engaging portion provided on the first holding portion side and a second engaging portion provided on the main body side and engaged with the first engaging portion. The puncture device according to claim 1. Claim 1 in the engaging portion, 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. Alternatively, the puncture device according to claim 2. The housing is configured to be connectable and 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 linked to the operation in which the housing rotates relative to the main body portion about the protruding direction. Engage by rotating relative to the body
The connection between the main body and the housing is such that the housing is relative to the main body with respect to the protruding direction in a state where the first holding portion and the main body are engaged in the engaging portion. The puncture device according to claim 3, which is released by rotating the device. The puncture mechanism further includes a regulating portion that regulates the movement of the puncture needle holding portion against the urging force.
The puncture device according to claim 4, wherein the regulation by the regulating portion is released in conjunction with an operation in which the housing rotates relative to the main body portion about the protruding direction. The fourth or fifth aspect of the present invention, wherein the housing is configured to be connectable and separable, and further has a safety cap that regulates the rotation of the housing with respect to the main body while being connected to the housing. Puncture device. The puncture device according to claim 6, wherein the safety cap is configured to be attached 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 includes a attachment portion that can be attached to a living body and a cradle that has a attachment portion that can be attached to a delivery mechanism that delivers a predetermined dose into the living body via the cannula. 7. The puncture device according to any one of 7.