JPWO2019155688A1 - Indwelling device and base member - Google Patents

Abstract

The indwelling device according to the present disclosure includes a device main body having a mounting surface to be mounted on a living body and a needle member, and the device main body is said to be in the living body by projecting the needle member from the mounting surface. The insertion mechanism includes an insertion mechanism for inserting the needle member, and the insertion mechanism includes a guide portion that comes into contact with the needle member and rotates the needle member in a plane including the central axis of the needle member.

Description

The present disclosure relates to an indwelling device and a base member.

Conventionally, a sensor unit is inserted or embedded in the body of a subject such as a patient, and a substance to be measured (for example, glucose, pH, a physiologically active substance, a protein, etc.) in the blood or body fluid of the subject is subjected to the sensor unit. It is being detected.

Patent Document 1 discloses a monitoring device used for a continuous glucose monitor (Continuous Glucose Monitoring, abbreviated as "CGM"). In the monitoring device described in Patent Document 1, the sensor and the puncture blade member are inserted subcutaneously, and the puncture blade member is pulled out from the subcutaneous part in a state of being separated from the sensor and collected.

Japanese Patent No. 5748595

In an indwelling device such as the monitoring device described in Patent Document 1, a part thereof is indwelled on the surface of a living body. If the amount of protrusion (thickness) from the surface of the living body is large, the daily life of users such as subjects and patients is likely to be hindered. In order to reduce such a burden on the user, it is preferable that the indwelling device is thinned.

On the other hand, if the indwelling device is made thinner, it becomes difficult to realize a configuration in which an insertion mechanism for inserting the sensor and the puncture blade member from the surface of the living body to a predetermined depth in the living body is integrated.

Therefore, the present disclosure discloses an indwelling device and a base member having a configuration capable of reducing the thickness of a portion to be indwelled on the surface of the living body, including an insertion mechanism of the needle member, while ensuring the insertion depth of the needle member in the living body. The purpose is to provide.

The indwelling device as the first aspect of the present disclosure includes a device main body including a mounting surface to be mounted on a living body and a needle member, and the device main body projects the needle member from the mounting surface. An insertion mechanism for inserting the needle member into the living body is provided, and the insertion mechanism includes a guide portion that comes into contact with the needle member and rotates the needle member in a plane including the central axis of the needle member.

As one embodiment of the present disclosure, the insertion mechanism includes a moving portion capable of moving the needle member in a predetermined direction, and the guide portion is the needle member moved by the moving portion. The needle member is rotated in a plane including the central axis, and the traveling direction of the tip of the needle member is changed from the predetermined one direction.

As one embodiment of the present disclosure, the base end portion of the needle member is orthogonal to the predetermined one direction with respect to the moving portion when the base end portion of the needle member is moved in the predetermined one direction by the moving portion. It is movable in the direction.

In one embodiment of the present disclosure, the guide portion is substantially orthogonal to the predetermined one direction and changes the traveling direction of the tip of the needle member in a direction toward the mounting surface.

As one embodiment of the present disclosure, the guide portion is composed of an arcuate curved surface extending toward the mounting surface in a cross section including the central axis in a predetermined direction. ..

The indwelling device as one embodiment of the present disclosure includes a detection member that is inserted into the living body and can detect the substance to be measured in the living body, and a support member that supports the detection member, and the insertion. The moving portion of the mechanism can return and move the needle member in a direction opposite to the predetermined one direction, and the needle member is moved in the predetermined one direction by the moving portion of the insertion mechanism. In addition, the detection member and the support member move in a predetermined direction together with the needle member in a state where the detection member extends inside the needle member, and together with the needle member, the insertion mechanism of the insertion mechanism. By rotating by the guide portion, the needle member changes to a posture in which the needle member does not move following the return movement in the opposite direction.

As one embodiment of the present disclosure, the moving portion of the insertion mechanism uses magnetic force or elastic force to move the needle member.

As one embodiment of the present disclosure, the needle member is an arc needle that is curved and extends in an arc shape.

The indwelling device as the second aspect of the present disclosure includes a device main body including a mounting surface to be mounted on a living body and a needle member, and the device main body projects the needle member from the mounting surface. The insertion mechanism includes an insertion mechanism for inserting into the living body, and the insertion mechanism includes a moving portion capable of moving the needle member in a predetermined one direction and the opposite direction of the predetermined one direction. The unit moves the needle member in the predetermined one direction by one magnetic force of attractive force and repulsive force, and moves the needle member in the opposite direction by the other magnetic force.

The base member as the third aspect of the present disclosure is a base member to which a cover member including a communication device can be attached and has a mounting surface to be mounted on a living body, and the needle member and the needle member are attached to the needle member. An insertion mechanism for inserting the needle member into the living body by projecting from the mounting surface is provided, and the insertion mechanism abuts on the needle member and the needle member is in contact with the needle member in a plane including the central axis of the needle member. A guide portion for rotating the

According to the present disclosure, an indwelling device and a base having a configuration capable of reducing the thickness of a portion to be indwelled on the surface of a living body, including an insertion mechanism of the needle member, while ensuring an insertion depth of the needle member in the living body. Members can be provided.

It is a perspective view which shows the upper surface side of the indwelling apparatus in an unused state. It is a perspective view which shows the lower surface side of the indwelling apparatus shown in FIG. It is a perspective view which shows the lower surface side of the indwelling apparatus which changed the state from the state shown in FIG. 2 to the state which the needle member protruded. It is a top view of the indwelling device shown in FIG. It is sectional drawing which follows the line I-I of FIG. It is sectional drawing which shows the same cross section as FIG. 5 about the indwelling apparatus shown in FIG. It is a figure which shows the mounting process which mounts an unused indwelling apparatus on a living body surface. It is a figure which shows the insertion process which inserts the needle member and the detection member of the indwelling apparatus shown in FIG. 7A into a living body. FIG. 7B is a diagram showing a removal step of removing a needle member from the living body while keeping the detection member inserted in FIG. 7B in the living body. It is a figure which shows the removal process which removes the indwelling apparatus shown in FIG. 7C from a living body. It is an exploded perspective view which disassembled the indwelling apparatus in an unused state. It is an exploded perspective view which disassembled the base member of the indwelling apparatus shown in FIG. 1 into a pedestal cover member and other parts. The base member of the indwelling device shown in FIG. 1 includes a pedestal cover member, a group of members including a needle member, a detection member, a slider, a needle holding member, and a support member, a drive device, a pedestal member, a drive control member, a circuit board, and the like. It is an exploded perspective view disassembled into four parts of a member group including an operation member. It is sectional drawing of each of the base member and cover member shown in FIG. 8 at the same position as the cross section shown in FIGS. 5 and 6. Of the base members shown in FIG. 8, only the needle member, the detection member, the needle holding member, and the support member are shown. It is a figure which shows the lower surface of the rotating part among the base members shown in FIG. It is a figure which shows the base member in the indwelling apparatus in an unused state. FIG. 13A is a diagram showing a base member in a state in which the insertion mechanism is operated from the state of FIG. 13A and the needle member and the detection member are most projected from the mounting surface. FIG. 13B is a diagram showing a base member in a state in which the slider is pulled back from the state of FIG. 13B and moved back in the moving direction, and only the needle member is pulled back and housed inside while the detection member is projected from the mounting surface. It is a figure which shows the base member in the indwelling apparatus as a modification of an unused state. FIG. 14 is a diagram showing a base member in a state in which the insertion mechanism is operated from the state of FIG. 14A and the needle member and the detection member are most projected from the mounting surface. FIG. 14B is a diagram showing a base member in a state in which the slider is pulled back from the state of FIG. 14B and moved in the moving direction, and only the needle member is pulled back and housed inside while the detection member is projected from the mounting surface. It is sectional drawing which shows the detail of the drive device of the base member shown in FIG. 14A.

Hereinafter, embodiments of the indwelling device and the base member according to the present disclosure will be described with reference to FIGS. 1 to 15. The same reference numerals are given to common members and parts in each figure.

FIG. 1 is a perspective view showing the upper surface side of the indwelling device 1 of the present embodiment. FIG. 2 is a perspective view showing the lower surface side of the indwelling device 1 of the present embodiment. FIG. 3 is a perspective view showing the lower surface side of the indwelling device 1 in which the state of the needle member 2 is changed from the state shown in FIGS. 1 and 2 to a state in which the needle member 2 is projected.

As shown in FIGS. 1 to 3, the indwelling device 1 includes a needle member 2 and a device main body 3. The device main body 3 includes an insertion mechanism. The insertion mechanism allows the needle member 2 to be inserted into the living body from the surface of the living body. Specifically, by operating the insertion mechanism, the needle member 2 does not project outward from the device body 3 (see FIG. 2), and the needle member 2 projects outward from the device body 3 (FIG. 3). The state can be changed to (see). That is, the insertion mechanism allows the needle member 2 to protrude outward from the mounting surface 3a of the device main body 3. The mounting surface 3a of the device main body 3 is a surface to be mounted on a living body. More specifically, the mounting surface 3a of the device main body 3 is a contact surface that comes into contact with the surface of the living body when the indwelling device 1 is mounted on the living body. The needle member 2 can be inserted into the living body by the above-mentioned protruding operation by the insertion mechanism.

The mounting surface 3a of the device main body 3 is provided with a mounting portion capable of maintaining the position of the device main body 3 on the surface of the living body. The attachment portion can be, for example, an attachment portion made of an adhesive, an adhesive, or the like and which can be attached to the surface of a living body.

FIG. 4 is a top view of the indwelling device 1 shown in FIGS. 1 and 2. FIG. 5 is a cross-sectional view taken along the line II of FIG. In other words, FIG. 5 is a cross-sectional view in a state where the needle member 2 does not protrude outward. On the other hand, FIG. 6 is a cross-sectional view showing the same cross section as that of FIG. 5 for the indwelling device 1 shown in FIG. In other words, FIG. 6 is a cross-sectional view showing the same cross section as that of FIG. 5 in a state where the needle member 2 projects outward.

As shown in FIGS. 5 and 6, the insertion mechanism abuts the guide portion 61 that abuts on the needle member 2 and rotates the needle member 2 in the puncture direction in the plane including the central axis O of the needle member 2. Be prepared. The central axis O of the needle member 2 means a central axis extending in the extending direction A, which is the longitudinal direction of the needle member 2. Further, the surface including the central axis O of the needle member 2 means a plane including all of the central axis O of the needle member 2 including at least the central axis specified by the portion on the tip side that can protrude from the mounting surface 3a. To do. By providing such a guide portion 61, the needle member 2 can be rotated and the extending direction A of the needle member 2 can be changed. The extending direction A of the needle member 2 is a direction along the central axis O of the needle member 2. Therefore, with respect to the indwelling device 1, it is possible to reduce the thickness of the portion to be indwelled on the surface of the living body, including the insertion mechanism of the needle member 2, while ensuring the insertion depth of the needle member 2 in the living body. it can.

Further, if the needle member 2 itself is rotated without being deformed to change the extending direction A of the needle member 2, the configuration is compared with a configuration in which the needle member itself is deformed to change the extending direction. Therefore, the needle member 2 can be hard to bend at the time of insertion into the living body or during the insertion. Therefore, the needle member 2 can be more reliably inserted to a desired position in the living body.

The guide portion 61 is not particularly limited as long as it abuts on the needle member 2 and rotates the needle member 2 in a plane including the central axis O of the needle member 2. The needle member 2 rotates in the direction from the indwelling device 1 toward the living body in the plane including the central axis O of the needle member 2. In other words, the needle member 2 rotates in a plane in which the surface including the central axis O of the needle member 2 and the mounting surface 3a are substantially orthogonal to each other. Although details will be described later, the guide portion 61 of the present embodiment is composed of a curved surface 36 for partitioning the passage 21c1 through which the needle member 2 is inserted (see FIGS. 5 and 6). Details of the insertion mechanism of the present embodiment including the guide portion 61 will also be described later.

In the present embodiment, the above-mentioned "part to be indwelled on the surface of the living body" means the device main body 3 of the indwelling device 1. Further, the "thickness" means the amount of protrusion from the surface of the living body. Specifically, the thickness of the device main body 3 of the present embodiment means the maximum length in a direction substantially orthogonal to the flat mounting surface 3a of the device main body 3. Hereinafter, for convenience of explanation, the direction substantially orthogonal to the mounting surface 3a will be referred to as “thickness direction B”.

Further, the insertion mechanism of the present embodiment includes, in addition to the guide portion 61 described above, a moving portion 62 capable of moving the needle member 2 in a predetermined direction. The moving portion 62 of the present embodiment can move the needle member 2 in a predetermined direction substantially parallel to the flat mounting surface 3a. In other words, the moving portion 62 of the present embodiment can move the needle member 2 in a predetermined direction substantially orthogonal to the thickness direction B.

The guide portion 61 of the present embodiment abuts on the needle member 2 moving by the moving portion 62, rotates the needle member 2 in a plane including the central axis O, and determines the traveling direction of the tip of the needle member 2. Change from one direction. With such a configuration, the traveling direction of the tip of the needle member 2 can be changed by rotating the needle member 2 while moving it. Therefore, the insertion depth of the needle member 2 in the living body can be made deeper while reducing the thickness of the portion placed on the surface of the living body as compared with the configuration in which the needle member 2 only rotates. ..

More specifically, the guide portion 61 of the present embodiment is substantially orthogonal to a predetermined direction, and changes the traveling direction of the tip of the needle member 2 in the direction toward the mounting surface 3a. That is, in the guide portion 61 of the present embodiment, the traveling direction of the tip of the needle member 2 is from one direction substantially parallel to the mounting surface 3a to a direction substantially orthogonal to the mounting surface 3a (the same as the thickness direction B in the present embodiment). Change to direction). With such a configuration, the insertion depth of the needle member 2 in the living body can be further increased while reducing the thickness of the portion to be placed on the surface of the living body.

The moving portion 62 is not particularly limited as long as the needle member 2 can be moved in a predetermined direction. Although details will be described later, the moving portion 62 of the present embodiment is configured by the slider 24 (see FIGS. 9A and 9B). Further, in the present embodiment, the predetermined one direction in which the moving portion 62 moves the needle member 2 is the insertion moving direction C1, which is one side of the linear moving direction C of the slider 24. Details of the insertion mechanism of the present embodiment including the moving portion 62 will also be described later.

Hereinafter, further details of the indwelling device 1 of the present embodiment will be described.

The indwelling device 1 of the present embodiment shown in FIGS. 1 to 6 is a biological information detection device. The biological information detection device as the indwelling device 1 of the present embodiment includes the detection member 4 in addition to the needle member 2 and the device main body 3 described above. As shown in FIGS. 5 and 6, the detection member 4 of the present embodiment is inserted into the living body together with the needle member 2 and can detect the substance to be measured in the living body. In the biological information detection device as the indwelling device 1 attached to the subject, information on the detection result of the substance to be measured by the detection member 4 indwelled in the living body is transmitted to the device main body 3. The device main body 3 analyzes the received detection result information, and transmits the analysis result to an external device such as a display device as needed. The biological information detection device as the indwelling device 1 measures the substance to be measured in the body fluid of the subject over time while being worn by the subject. Further, the period during which the biological information detection device as the indwelling device 1 is attached to the subject is appropriately determined by the judgment of a doctor or the like, such as several hours, several days, one week, and one month.

The substance to be measured is not particularly limited. The detection member can be selected according to the substance to be measured. The detection member 4 of the present embodiment can measure glucose, oxygen, pH, lactic acid, etc. in the interstitial fluid.

First, a method of using the biological information detection device as the indwelling device 1 of the present embodiment will be described. FIG. 7A is a diagram showing a mounting process of mounting the unused indwelling device 1 shown in FIG. 2 and the like on the biological surface BS. The “unused indwelling device 1” means a state in which the needle member 2 and the detection member 4 do not protrude from the mounting surface 3a of the device main body 3. Further, the cross section of the indwelling device 1 shown in FIG. 7A is the same as the cross section shown in FIG. The operator places the mounting surface 3a of the apparatus main body 3 exposed by peeling the release paper (not shown) on the biological surface BS. As described above, the mounting surface 3a is provided with a sticking portion. Therefore, the indwelling device 1 is mounted on the biological surface BS by placing and attaching the mounting surface 3a on the biological surface BS.

FIG. 7B is a diagram showing an insertion step of inserting the needle member 2 and the detection member 4 into the living body by operating the indwelling device 1 mounted on the living body surface BS in FIG. 7A. In the state shown in FIG. 7A, the operation member 29 described later is pressed. As a result, as shown in FIG. 7B, the needle member 2 and the detection member 4 project from the mounting surface 3a. The portion on the tip end side of the detection member 4 is housed inside the needle member 2. By this protruding operation, the needle member 2 and the detection member 4 are inserted into the living body. In other words, the indwelling device 1 is in the state shown in FIGS. 3 and 6. The protruding operation of the needle member 2 and the detection member 4 from the mounting surface 3a is realized by the insertion mechanism of the device body 3 described above. The details of the insertion mechanism will be described later.

FIG. 7C is a diagram showing a removal step in which the needle member 2 and the detection member 4 are inserted into the living body, and then the needle member 2 is removed from the living body while the detection member 4 is left in the living body. As a result, the needle member 2 is housed inside the device main body 3 indwelled on the biological surface BS. On the other hand, the detection member 4 is placed in the living body. In this state, the detection member 4 is used for continuous measurement of the substance to be measured together with the communication device 42 described later for a predetermined period such as one week.

FIG. 7D is a diagram showing a removal step of removing the indwelling device 1 from the living body after a predetermined period for measuring the substance to be measured has elapsed. For example, as shown in FIG. 7D, the indwelling device 1 is removed from the biological surface BS by peeling off the mounting surface 3a of the device main body 3 from one end side to the other end side (see the white arrow in FIG. 7D). By this removal operation, the detection member 4 is also removed from the living body.

Hereinafter, details of each part of the biological information detection device as the indwelling device 1 of the present embodiment will be described.

FIG. 8 is an exploded perspective view of the unused indwelling device 1 shown in FIG. 2 and the like. As shown in FIG. 8, the indwelling device 1 of the present embodiment includes a base member 11 and a cover member 12. In other words, the indwelling device 1 is formed by attaching the cover member 12 to the base member 11. Although details will be described later, the needle member 2 and the detection member 4 of the present embodiment are included in the base member 11 (see FIG. 10). Further, the apparatus main body 3 of the present embodiment is composed of a portion of the base member 11 other than the needle member 2 and the detection member 4, and the entire cover member 12. Further, the insertion mechanism of the apparatus main body 3 of the present embodiment is included in the base member 11. 9A and 9B are exploded perspective views of the base member 11. FIG. 10 is a cross-sectional view of each of the base member 11 and the cover member 12 shown in FIG. The cross section shown in FIG. 10 is a cross section at the same position as the cross section shown in FIGS. 5 and 6.

First, details of each of the base member 11 and the cover member 12 of the biological information detection device as the indwelling device 1 of the present embodiment will be described mainly with reference to FIGS. 8 to 10. Here, unless otherwise specified, the base member 11 and the cover member 12 constituting the unused indwelling device 1 shown in FIGS. 2, 5 and the like will be described.

<Base member 11>
As shown in FIGS. 8 to 10, the base member 11 of the present embodiment includes a needle member 2, a detection member 4, a pedestal member 21, a pedestal cover member 22, a drive device 23, a slider 24, a needle holding member 25, and a support member. 26, a drive control member 27, a circuit board 28, and an operation member 29. FIG. 9A is an exploded perspective view of the base member 11 disassembled into a pedestal cover member 22 and the rest. FIG. 9B shows the base member 11 as a member group including a pedestal cover member 22, a needle member 2, a detection member 4, a slider 24, a needle holding member 25 and a support member 26, a driving device 23, a pedestal member 21, and a drive. It is an exploded perspective view disassembled into four parts of a member group including a control member 27, a circuit board 28 and an operation member 29.

[Needle member 2]
As shown in FIG. 10, the needle member 2 houses the detection member 4 inside, and is inserted into the living body together with the detection member 4. A blade surface is formed at the tip of the needle member 2. Further, the needle member 2 is less likely to bend than the detection member 4. Therefore, the detection member 4 can be easily inserted into the living body by inserting the needle member 2 into the living body with the detecting member 4 housed in the needle member 2.

As described above, the needle member 2 of the present embodiment is inserted into the living body together with the detecting member 4, and then removed from the living body while the detection member 4 is left in the living body. FIG. 11 is a diagram showing only the needle member 2, the detection member 4, the needle holding member 25, and the support member 26. As shown in FIG. 11, the needle member 2 of the present embodiment is a U-shaped needle having a cross section orthogonal to the extending direction A and having a gap formed in a part in the circumferential direction. In other words, the needle member 2 of the present embodiment is formed with a slit opening 2a extending along the extending direction A of the needle member 2. When the needle member 2 is removed from the living body, the detection member 4 can escape from the inside of the needle member 2 to the outside through the slit opening 2a.

Further, as shown in FIG. 10 and the like, the needle member 2 of the present embodiment is an arc needle that is curved and extends in an arc shape. The needle member 2 of the present embodiment has a base end supported by a columnar needle holding member 25 described later, extends from the needle holding member 25 in a direction substantially orthogonal to the thickness direction B, and becomes thicker toward the tip. It is curved in an arc shape in the direction B toward the mounting surface 3a.

As shown in FIGS. 5 and 6, the traveling direction of the needle member 2 of the present embodiment changes when the needle member 2 is inserted. More specifically, the needle member 2 of the present embodiment is a plane including all the central axis O so that the length of the needle member 2 in the thickness direction B becomes the longest when the needle member 2 is inserted into a living body protruding from the mounting surface 3a. By rotating inside, the extending direction A is changed.

The slit opening 2a (see FIG. 11) described above is formed on a portion (lower portion of FIG. 10) on the mounting surface 3a side of the peripheral wall of the needle member 2 that is curved in an arc shape.

The thickness of the needle member 2 is, for example, a maximum outer diameter of 0.2 mm to 1.2 mm (corresponding to an outer diameter of 33 to 18 gauge). The length of the needle member 2 is 1 mm to 10 mm, preferably 3 to 6 mm. The wall thickness of the needle member 2 is set in the range of 0.02 mm to 0.15 mm.

As the material of the needle member 2, for example, a metal material such as stainless steel, aluminum, aluminum alloy, titanium, or titanium alloy is used.

Further, as will be described in detail later, the needle member 2 of the present embodiment can be moved in the insertion moving direction C1 as a predetermined one direction by the slider 24 as the moving portion 62. The base end portion of the needle member 2 of the present embodiment can move in the thickness direction B as a direction orthogonal to a predetermined one direction with respect to the moving portion 62 when the needle member 2 is moving. Is.

[Detection member 4]
As shown in FIG. 10, the detection member 4 includes a linear wire electrode extending in the needle member 2 along the extending direction A of the needle member 2. As shown in FIG. 11, the detection member 4 of the present embodiment is composed of three electrodes (working electrode 50a, reference electrode 50b, counter electrode 50c) arranged in the needle member 2. The working electrode 50a has a core material having a conductive layer extending in the extending direction A, a detection unit configured to detect a substance to be measured in contact with a sample on the outer wall of the core material, and transmission of an interfering substance. It is provided with a protective part for limiting the amount of the material and an insulating part coated with an insulating material. The detection unit can detect changes in electrical characteristics with respect to the substance to be measured. The detection unit is formed on the surface of the core material by using a thin film forming means such as spray coating, dipping, electrolytic polymerization, and sputtering. A plurality of detection members 4 may be arranged in the needle member 2. The detection member 4 is appropriately selected depending on the method for measuring the substance to be measured, and the number of electrodes arranged in the needle member 2 is not particularly limited.

The detection member 4 is connected to an electric circuit formed on a circuit board 28 (see FIG. 10 and the like) described later. Specifically, the proximal end side of the detection member 4 of the present embodiment extends outside the needle member 2 through the slit opening 2a of the needle member 2, and the electric circuit formed on the circuit board 28 will be described later. It is connected to the first electrical contact portion 28a (see FIG. 9A). An electric signal corresponding to the amount of the substance to be measured detected by the detection member 4 in the living body is transmitted to the communication device 42 of the cover member 12 described later through the electric circuit on the circuit board 28.

More specifically, the detection member 4 of the present embodiment has a tip side portion 4a extending inside the needle member 2 along the extending direction A of the needle member 2 and a tip end portion 4a bent from the tip end side portion 4a. A base end side portion 4b extending in a direction different from the extending direction of the side portion 4a is provided. The base end side portion 4b extends to the outside of the needle member 2 through the slit opening 2a. Further, the base end side portion 4b extends between the needle holding member 25 and the support member 26, which will be described later, via a lead wire 37 (see FIG. 9A; not shown except for FIGS. 9A, 13 and 14). , Is connected to the first electric contact portion 28a (see FIG. 9A) of the electric circuit formed on the circuit board 28.

The outer diameter of each electrode constituting the detection member 4 is preferably 0.02 mm to 0.2 mm. As the outer diameter of each electrode constituting the detection member 4 becomes larger, the invasion at the time of insertion into the living body becomes larger.

[Pedestal member 21]
As shown in FIGS. 8 to 10, the pedestal member 21 of the present embodiment includes a bottom plate portion 21a and a side plate portion 21b. The bottom plate portion 21a has an oval-shaped outer edge. The side plate portion 21b continuously protrudes from the outer edge of the bottom plate portion 21a to one side in the thickness direction of the bottom plate portion 21a (in the present embodiment, the same direction as the thickness direction B). An insertion mechanism including a drive device 23, a slider 24, and the like, which will be described later, is attached to one surface of the bottom plate portion 21a in the thickness direction. The surface of the bottom plate portion 21a on the other side in the thickness direction constitutes the mounting surface 3a of the device main body 3 of the indwelling device 1. As described above, the mounting surface 3a is provided with a sticking portion for sticking to a living body. Hereinafter, for convenience of explanation, the surface on the other side of the bottom plate portion 21a constituting the mounting surface 3a in the thickness direction is referred to as a “biological contact surface”, and is the surface opposite to the biological contact surface in the thickness direction of the bottom plate portion 21a. One surface is referred to as the "mounting surface".

In the space surrounded by the side plate portion 21b on the mounting surface side of the bottom plate portion 21a, the needle member 2, the detection member 4, the drive device 23, the slider 24, the needle holding member 25, the support member 26, the drive control member 27, and the like. The circuit board 28 is arranged. Further, the space surrounded by the side plate portion 21b on the mounting surface side of the bottom plate portion 21a is covered with the pedestal cover member 22. As shown in FIG. 10, an opening 21b1 is formed in a part of the side plate portion 21b in the circumferential direction. The operation member 29, which will be described later, projects from the inside to the outside of the side plate portion 21b through the opening 21b1.

As shown in FIGS. 9 and 10, the pedestal member 21 further includes a protruding portion 21c protruding from the mounting surface of the bottom plate portion 21a to one side in the thickness direction. As shown in FIG. 10, the protrusion 21c has a passage 21c1 through which the needle member 2 can be inserted, which leads from the space surrounded by the side plate 21b to the mounting surface 3a formed by the biological contact surface of the bottom plate 21a. Is formed. The inner wall that partitions the passage 21c1 includes a curved surface 36 that extends in an arc shape in a cross section (see FIG. 10) including the central axis O of the needle member 2. The needle member 2 can move along the passage 21c1 while abutting on the curved surface 36. The arc-shaped curved surface 36 extends so as to approach the mounting surface 3a in the thickness direction B toward the insertion movement direction C1 of the slider 24 described later as the moving portion 62. The guide portion 61 of the present embodiment is composed of the curved surface 36 described above.

Further, as shown in FIGS. 9A and 9B, an engaging recess 21c2 is formed on the outer surface of the protruding portion 21c. The engaging recess 21c2 fits with the engaging convex portion 35 (see FIG. 11) of the support member 26 described later. The pedestal member 21 can lock the support member 26 described later by fitting the engaging convex portion 35 into the engaging concave portion 21c2. The details will be described later.

As shown in FIG. 9B, a plurality of (two in this embodiment) locking convex portions 21a1 and a rotating shaft portion 21a2 are provided on the mounting surface of the bottom plate portion 21a. The plurality of locking convex portions 21a1 are inserted into the fixing portion 23a of the drive device 23 described later to fix the position of the fixing portion 23a with respect to the pedestal member 21. The rotating shaft portion 21a2 is inserted into the rotating portion 23b (see FIG. 9B and the like) of the drive device 23 described later. That is, the rotating portion 23b of the present embodiment is attached to the pedestal member 21 so as to be rotatable around the axis of the rotating shaft portion 21a2.

Further, as shown in FIG. 9B, a rotation control convex portion 21a3 is provided on the mounting surface of the bottom plate portion 21a. The rotation control convex portion 21a3 enters the arc-shaped elongated hole 23b3 (see FIG. 12) formed on the lower surface of the rotation portion 23b described later. The rotation control convex portion 21a3 limits the rotation direction and rotation range of the rotation portion 23b with respect to the pedestal member 21.

Further, as shown in FIGS. 9A and 9B, an outer surface convex portion 21b2 is provided along the outer surface of the side plate portion 21b of the pedestal member 21. When the cover member 12 is attached to the base member 11, the outer surface convex portion 21b2 fits into the inner surface concave portion 44b2 (see FIGS. 8 and 10) formed in the housing 44 of the cover member 12. As a result, the cover member 12 can be locked to the base member 11.

As shown in FIGS. 9A and 9B, a contact guide portion 21b3 for guiding the movement of the slider 24 in the linear direction, which will be described later, is provided on the inner surface of the side plate portion 21b. The slider 24 can move in the linear moving direction C by coming into contact with the contact guide portion 21b3.

As shown in FIGS. 8 to 10, an annular seal member 33 is attached to the tip surface of the side plate portion 21b of the pedestal member 21. The annular seal member 33 seals between the pedestal member 21 and the pedestal cover member 22, which will be described later, and seals between the pedestal member 21 and the housing 44 of the cover member 12. The annular seal member 33 can be formed of, for example, an elastic material such as rubber or an elastomer. Further, the annular seal member 33 can be integrally molded on the tip surface of the side plate portion 21b by, for example, two-color molding.

Examples of the material of the pedestal member 21 include a resin material. Examples of the resin material include ABS resin, AS resin, polyethylene, polypropylene, polystyrene, polyvinyl chloride, polyvinylidene chloride resin, polyphenylene oxide, thermoplastic polyurethane, polymethylene methacrylate, polyoxyethylene, fluororesin, polycarbonate, and polyamide. , Acetal resin, acrylic resin, thermoplastic resin used in injection molding such as polyethylene terephthalate, and thermosetting resin such as phenol resin, epoxy resin, silicone resin, and unsaturated polyester.

[Pedestal cover member 22]
As shown in FIGS. 8 and 10, the pedestal cover member 22 covers the pedestal member 21 in a state where the internal space X is held between the pedestal member 21 and the mounting surface of the bottom plate portion 21a. In the internal space X between the pedestal member 21 and the pedestal cover member 22, as described above, the needle member 2, the detection member 4, the drive device 23, the slider 24, the needle holding member 25, the support member 26, and the drive control member 27 and the circuit board 28 are accommodated. Although the details will be described later, the needle member 2 and the detection member 4 can be moved by the insertion mechanism. The needle member 2 and the detection member 4 can project from the biological contact surface of the bottom plate portion 21a of the pedestal member 21 as the mounting surface 3a of the device main body 3 (see FIG. 5 and the like) through the passage 21c1 of the pedestal member 21. Further, the needle member 2 protruding from the biological contact surface of the bottom plate portion 21a is housed in the internal space X through the passage 21c1 of the pedestal member 21 with the detection member 4 protruding from the biological contact surface of the bottom plate portion 21a. It is possible. Details of the configuration for realizing the above-mentioned operations of the needle member 2 and the detection member 4 will be described later.

As the material of the pedestal cover member 22, for example, the same material as the above-mentioned material exemplified as the material of the pedestal member 21 can be used.

[Drive device 23]
As shown in FIGS. 9 and 10, the drive device 23 includes a fixing portion 23a and a rotating portion 23b.

The fixed portion 23a has a power magnetic pole portion 23a1. The position of the fixing portion 23a of the present embodiment is fixed with respect to the pedestal member 21 by inserting a plurality of locking convex portions 21a1 provided on the bottom plate portion 21a of the pedestal member 21. The fixing portion 23a of the present embodiment is composed of a permanent magnet. Further, the fixed portion 23a of the present embodiment includes an N pole portion as the power magnetic pole portion 23a1 at a position facing the rotating portion 23b described later.

As shown in FIG. 9B, the rotating portion 23b has a first magnetic pole portion 23b1 having the same magnetic pole as the power magnetic pole portion 23a1 of the fixed portion 23a, and a second magnetic pole having a magnetic pole different from that of the power magnetic pole portion 23a1 of the fixed portion 23a. A unit 23b2 and the like. The rotating portion 23b of the present embodiment is rotatably attached to the pedestal member 21. Specifically, the rotating portion 23b of the present embodiment can rotate around the axis of the rotating shaft portion 21a2 in a state where the rotating shaft portion 21a2 provided in the bottom plate portion 21a of the pedestal member 21 is inserted. Is. Further, the rotating portion 23b of the present embodiment is composed of a permanent magnet, and includes an N pole portion as the first magnetic pole portion 23b1 and an S pole portion as the second magnetic pole portion 23b2.

If the N-pole portion as the first magnetic pole portion 23b1 of the rotating portion 23b is brought close to the N-pole portion as the power magnetic pole portion 23a1 of the fixed portion 23a, the rotating portion is caused by the magnetic force of the repulsive force between the same poles. The 23b can be rotated around the axis of the rotation shaft portion 21a2 of the pedestal member 21. On the contrary, if the S pole portion as the second magnetic pole portion 23b2 of the rotating portion 23b is brought close to the N pole portion as the power magnetic pole portion 23a1 of the fixed portion 23a, the magnetic force of the attractive force between the different poles causes. The rotating portion 23b does not rotate around the axis of the rotating shaft portion 21a2. That is, it is possible to maintain a state in which the N pole portion of the fixed portion 23a as the power magnetic pole portion 23a1 and the S pole portion of the rotating portion 23b as the second magnetic pole portion 23b2 are arranged close to each other.

The rotating portion 23b of the present embodiment has a substantially disk-shaped outer shape in which a through hole through which the rotating shaft portion 21a2 can be inserted is formed at the center position. Further, the rotating portion 23b of the present embodiment is composed of only the first magnetic pole portion 23b1 and the second magnetic pole portion 23b2. More specifically, the rotating portion 23b of the present embodiment is composed of a semicircular first magnetic pole portion 23b1 and a semicircular second magnetic pole portion 23b2. Further, on the outer surface of the fixed portion 23a of the present embodiment, a curved portion 23a2 extending along the outer peripheral surface of the rotating portion 23b is provided. That is, at least a part of the outer peripheral surface of the fixed portion 23a has a shape along the outer peripheral surface of the rotating portion 23b. The curved portion 23a2 is formed in the N pole portion as the power magnetic pole portion 23a1. By forming the curved portion 23a2 on the north pole portion as the power magnetic pole portion 23a1 in this way, the power magnetic pole portion 23a1 can be easily arranged close to the rotating portion 23b.

FIG. 12 is a diagram showing a lower surface of the rotating portion 23b of the present embodiment facing the mounting surface of the bottom plate portion 21a (see FIG. 9B and the like) of the pedestal member 21. As shown in FIG. 12, an elongated hole 23b3 extending in an arc shape along the rotation direction of the rotating portion 23b is formed on the lower surface of the rotating portion 23b. The rotation control convex portion 21a3 (see FIG. 9B) of the pedestal member 21 described above is inserted into the elongated hole 23b3. When the rotating portion 23b rotates with respect to the pedestal member 21, the relative position of the rotation control convex portion 21a3 in the elongated hole 23b3 changes. Then, the rotation control convex portion 21a3 abuts on the walls (starting point and ending point) at both ends in the extending direction extending in an arc shape of the elongated hole 23b3, so that further rotation of the rotating portion 23b is restricted. ..

Further, as shown in FIG. 12, the rotating portion 23b has a stepped portion 23b4 formed on a part of the outer peripheral surface in the circumferential direction, and the stepped portion 23b4 has an engaging wall portion facing the circumferential direction. 31 is formed. The engaging wall portion 31 is composed of a notch surface facing in the same direction as the rotation direction. By abutting the engaging wall portion 31 with the drive control member 27 described later, it is possible to prevent the rotating portion 23b of the drive device 23 from unintentionally rotating in the indwelling device 1 in the unused state. it can. As a result, in the unused indwelling device 1 shown in FIG. 2 and the like, it is possible to prevent the needle member 2 and the detection member 4 from unintentionally jumping out from the mounting surface 3a. Details of the drive control member 27 will be described later.

Further, as shown in FIGS. 9A and 9B, the rotating portion 23b is formed with an engaging shaft portion 23b5 that engages with the slider 24 described later. The engaging shaft portion 23b5 of the present embodiment is formed on the upper surface opposite to the lower surface of the rotating portion 23b. Further, the engaging shaft portion 23b5 is formed at a position different from the position of the rotating shaft portion 21a2, that is, a position away from the rotation center of the rotating portion 23b. Therefore, when the rotating portion 23b rotates, the position of the engaging shaft portion 23b5 also moves in the moving direction C in the rotating plane of the rotating portion 23b. The slider 24, which will be described later, can move in the moving direction C as the engaging shaft portion 23b5 moves.

The fixed portion 23a of the present embodiment includes an N-pole portion as the power magnetic pole portion 23a1, but the present invention is not limited to this configuration, and the power magnetic pole portion 23a1 may be configured by the S-pole portion. In such a case, the first magnetic pole portion 23b1 having the same magnetic pole as the power magnetic pole portion 23a1 of the fixed portion 23a is used as the S pole portion, and the second magnetic pole portion 23b2 having a magnetic pole different from that of the power magnetic pole portion 23a1 of the fixed portion 23a is N. The pole part.

[Slider 24]
The slider 24 can move in the linear moving direction C by contacting the contact guide portion 21b3 (see FIGS. 9A and 9B) of the side plate portion 21b of the pedestal member 21 described above. As described above, the moving portion 62 of the present embodiment is configured by the slider 24.

As shown in FIGS. 9A and 9B, the slider 24 of the present embodiment is formed with an engaging recess 24a into which the cylindrical engaging shaft portion 23b5 of the rotating portion 23b of the driving device 23 is fitted. The engaging recess 24a of the present embodiment is an elongated hole extending linearly in the rotation plane of the rotating portion 23b in a direction orthogonal to the linear moving direction C of the slider 24. The width of the elongated hole as the engaging recess 24a in the moving direction C is substantially equal to the maximum diameter of the engaging shaft portion 23b5. Therefore, when the rotating portion 23b rotates, the engaging shaft portion 23b5 is orthogonal to the inner walls 24a1 located on both sides of the engaging recess 24a in the moving direction C and the moving direction C in the rotating plane of the rotating portion 23b. Contact in the direction of While abutting in this way, the engaging shaft portion 23b5 presses the inner wall 24a1 of the engaging recess 24a in the moving direction C of the slider 24. As a result, the slider 24 can be moved in the moving direction C. Further, in this embodiment, the engaging recess 24a is formed by an elongated hole extending linearly in a direction orthogonal to the linear moving direction C of the slider 24. However, it is also possible to increase or decrease the amount of movement when the slider 24 moves in the C direction by forming the engaging recess 24a into a curved arc-shaped elongated hole.

The slider 24 does not regulate the rotation of the needle holding member 25. Specifically, the needle holding member 25 extends orthogonally to the surface of the needle member 2 including the central axis O. When the extending direction of the needle holding member 25 is the axial direction, the slider 24 does not restrict the needle holding member 25 from rotating around the axial direction. That is, the needle holding member 25 can rotate around the axial direction.

Further, the slider 24 does not restrict the movement of the needle holding member 25 in the thickness direction B. In other words, the slider 24 does not regulate the revolving rotation of the needle holding member 25. Specifically, the slider 24 moves the needle holding member 25 in the moving direction C by pressing the needle holding member 25 in the moving direction C. On the other hand, the slider 24 does not hinder the movement of the needle holding member 25 in the thickness direction B orthogonal to the movement direction C. Therefore, the needle holding member 25 can move in the thickness direction B with respect to the slider 24. As a result, the needle holding member 25 can revolve around a predetermined central axis orthogonal to the surface including the central axis O of the needle member 2.

In this way, the slider 24 engages with the needle holding member 25 to realize the movement of the needle holding member 25 in the moving direction C. On the other hand, the slider 24 has a rotation around the axial direction of the needle holding member 25 and a revolution of the needle holding member 25 around a predetermined central axis orthogonal to the surface including the central axis O of the needle member 2. Does not regulate. Therefore, the needle member 2 of the present embodiment moves to rotate around two predetermined center points in the plane including the central axis O. The rotation operation of the tip portion around the base end portion of the needle member 2 and the rotation operation of the entire needle member 2 around a predetermined central axis at a position different from that of the needle member 2. The former rotational operation is caused by the above-mentioned rotation of the needle holding member 25. Further, the latter rotational operation is caused by the above-mentioned revolution of the needle holding member 25.

Therefore, when the needle member 2 and the detection member 4 are inserted into the living body, the outer wall of the needle member 2 comes into contact with the curved surface 36 (see FIG. 10 and the like) of the passage 21c1 of the pedestal member 21. This causes the above-mentioned rotation and / or revolution of the needle holding member 25. As a result, the traveling direction of the needle member 2 changes as the needle member 2 rotates.

That is, in the present embodiment, the outer peripheral surface of the needle member 2 as the outer wall abuts on the curved surface 36 which is the inner wall of the passage 21c1 of the pedestal member 21, and the needle holding member 25 rotates and / or revolves as described above. , Stable rotation in the plane including the central axis O (see FIG. 5 and the like) of the needle member 2 is realized. Hereinafter, for convenience of explanation, a state in which the needle member 2 and the detection member 4 do not protrude from the mounting surface 3a is referred to as a “first state” (see FIGS. 5, 7A, and 10). For convenience of explanation, the state in which the needle member 2 and the detection member 4 most protrude from the mounting surface 3a is referred to as a "second state" (see FIGS. 6 and 7B). For convenience of explanation, the state in which only the detection member 4 protrudes most from the mounting surface 3a is referred to as a "third state" (see FIG. 7C).

When the state changes from the first state (see FIG. 7A or the like) to the second state (see FIG. 7B or the like), the slider 24 can follow-move the support member 26 that supports the detection member 4. As shown in FIG. 11, the support member 26 is provided with an engaging portion 34 that abuts and engages with a part of the slider 24 when the form changes from the first state to the second state. Therefore, when the support member 26 of the present embodiment changes state from the first state to the second state, the engaging portion 34 shown in FIG. 11 engages with the slider 24, so that the support member 26 is inserted together with the slider 24 in the insertion moving direction C1. Move to. Therefore, when the state changes from the first state (see FIG. 7A or the like) to the second state (see FIG. 7B), the support member 26 moves following the linear movement of the slider 24 in the insertion movement direction C1. It is possible.

On the other hand, in the second state (see FIG. 7B and the like), the engagement between the slider 24 and the support member 26 is released. That is, in the present embodiment, when the state changes from the second state (see FIG. 7B or the like) to the third state (see FIG. 7C), the support member 26 does not move in the removal moving direction C2 together with the slider 24. Although the details will be described later, when the needle holding member 25 rotates when the state changes from the first state (see FIG. 7A or the like) to the second state (see FIG. 7B or the like), the support member 26 also becomes the needle holding member 25 and Following the needle member 2, it rotates in a cross section (see FIGS. 5, 6, etc.) including the central axis O of the needle member 2. Due to the rotation of the support member 26, the position of the engaging portion 34 (see FIG. 11) of the slider 24 in the thickness direction B changes from an engaging position when the slider 24 moves linearly to a non-engaging position. Change. The details will be described later.

Further, the slider 24 of the present embodiment has a configuration in which the needle member 2 is moved by using the magnetic force of the driving device 23. More specifically, the slider 24 as the moving portion 62 of the present embodiment has a moving direction C in which the needle member 2 is set as a predetermined one direction by the magnetic force of one of the attractive force and the repulsive force (repulsive force in the present embodiment). It is moved in the insertion movement direction C1 (left side in FIGS. 5 and 6) on one side. Further, the slider 24 as the moving portion 62 of the present embodiment pulls out the needle member 2 on the other side of the moving direction C by the other magnetic force (attractive force in the present embodiment) and moves in the moving direction C2 (FIGS. 5 and 6). Move to the right side). By doing so, the insertion operation and the removal operation of the needle member 2 can be realized with a simple configuration. Further, if the attractive force is used, it is possible to prevent the needle member 2 after removal from popping out again due to an impact or the like, as in the present embodiment. The details will be described later (see FIGS. 13A, 13B and 13C).

As the material of the slider 24, for example, the same material as the above-mentioned material exemplified as the material of the pedestal member 21 can be used.

[Needle holding member 25]
As shown in FIGS. 9 to 11, the needle holding member 25 holds the base end portion of the needle member 2. The needle holding member 25 of the present embodiment is formed of a rod-shaped member extending in a direction orthogonal to the surface including the central axis O of the needle member 2 at the position of the base end of the needle member 2. As described above, the needle holding member 25 moves in the moving direction C following the slider 24 by engaging with the slider 24. Further, the needle holding member 25 is rotatable with respect to the slider 24 as described above.

Specifically, the needle holding member 25 is sandwiched by a part of the slider 24 on both sides of the slider 24 in the linear moving direction C. Therefore, when the slider 24 linearly moves in the moving direction C, the needle holding member 25 engages with a part of the slider 24 and moves following the moving direction C.

Further, the needle holding member 25 of the present embodiment is not fixed to the slider 24 when it is in the initial position. However, the needle holding member 25 is designed so that when the slider 24 moves linearly, it is always engaged with a part of the slider 24 and can follow the movement. Specifically, the needle holding member 25 always interferes with a part of the slider 24 that engages with the needle holding member 25 at a position overlapping the moving direction C of the slider 24 in the thickness direction B, that is, when the slider 24 moves. It is placed at the (contact) position. As a result, even if the needle member 2 rotates and the position of the needle holding member 25 in the thickness direction B changes, both the needle member 2 and the needle holding member 25 can be moved following the moving direction C together with the slider 24. .. In the present embodiment, a part of the needle member 2 always extends in the passage 21c1 and is supported by the inner wall of the passage 21c1. By doing so, the needle holding member 25 of the present embodiment is always arranged at a position where it interferes with the slider 24 when the slider 24 is moved. Specifically, the needle member 2 of the present embodiment has a curved surface 36 as a guide portion 61 and a receiver provided on the pedestal member 21 in a cross section (see FIG. 5 and the like) including the central axis O of the needle member 2. Supported by section 70. As a result, the needle member 2 of the present embodiment is limited in the range of rotation in the plane including the central axis O of the needle member 2. Therefore, the needle holding member 25 can always be arranged at a position where it interferes with the slider 24 when the slider 24 is moved. The receiving portion 70 of the present embodiment is composed of an inner wall of the passage 21c1 facing the curved surface 36, including the edge portion.

As the material of the needle holding member 25, for example, the same material as the above-mentioned material exemplified as the material of the pedestal member 21 can be used.

[Support member 26]
As shown in FIG. 11, the support member 26 supports the detection member 4. More specifically, the support member 26 supports the tip side portion 4a of the detection member 4 so as to extend in the needle member 2 in the extending direction A of the needle member 2. The base end side of the detection member 4 from the position supported by the support member 26 is composed of a base end side portion 4b connected to the first electric contact portion 28a of the circuit board 28 via a conducting wire. ..

The support member 26 of the present embodiment has a plate-shaped main body portion 26a in which an insertion hole 26a1 through which the needle member 2 is inserted is formed, and a first wall portion 26b that projects substantially parallel to the main body portion 26a and faces each other. And a second wall portion 26c.

As shown in FIG. 11, the needle member 2 and the detection member 4 are inserted into and extend through the insertion hole 26a1 formed in the main body portion 26a of the support member 26. In other words, the support member 26 is supported on the outer wall of the needle member 2 penetrating the insertion hole 26a1. The insertion hole 26a1 is a long hole elongated in the thickness direction B, and is formed so as to be movable in the thickness direction B when the needle member 2 and the detection member 4 rotate.

Further, as shown in FIG. 11, of the first wall portion 26b, the outer surface opposite to the inner surface facing the second wall portion 26c is engaged as an engaging portion 34 that engages with the slider 24. Synthetic protrusions are formed. Similarly, of the second wall portion 26c, an engaging projection as an engaging portion 34 that engages with the slider 24 is formed on the outer surface of the second wall portion 26c on the side opposite to the inner surface facing the first wall portion 26b. There is. When the slider 24 moves, a part of the slider 24 engages with the above-mentioned engaging portion 34, so that the support member 26 can be moved following the moving direction C.

Further, as shown in FIG. 11, of the first wall portion 26b, an engaging convex portion 35 is formed on the inner side surface facing the second wall portion 26c. The engaging convex portion 35 of the first wall portion 26b is an engaging concave portion 21c2 (FIG. 7B) formed on the outer surface of the protruding portion 21c of the pedestal member 21 when the above-mentioned second state (see FIG. 7B or the like) is reached. 9A, see FIG. 9B). Similarly, of the second wall portion 26c, the engaging convex portion 35 is also formed on the inner side surface facing the first wall portion 26b. The engaging convex portion 35 of the second wall portion 26c is also formed in the engaging concave portion 21c2 formed on the outer surface of the protruding portion 21c of the pedestal member 21 when the above-mentioned second state (see FIG. 7B or the like) is reached. Fit. Details will be described later, but in the second state described above (see FIG. 7B and the like), the support member 26 includes the first wall portion 26b and the second wall portion 26c, and the protruding portion 21c of the pedestal member 21 (FIG. 9A, FIG. (See 9B, etc.) is inserted. At that time, the engaging convex portion 35 of the first wall portion 26b and the engaging convex portion 35 of the second wall portion 26c are fitted into the engaging concave portion 21c2 (see FIGS. 9A and 9B) of the protruding portion 21c and protrude. The support member 26 can be made difficult to separate from the portion 21c. By doing so, when the needle member 2 after being inserted into the living body is removed from the living body, the support member 26 can be maintained in a state of being locked to the protruding portion 21c (see FIG. 7C). As a result, it is possible to prevent the detection member 4 supported by the support member 26 from being removed from the living body together with the needle member 2. The details will be described later (see FIGS. 13A, 13B and 13C).

As the material of the support member 26, for example, the same material as the above-mentioned material exemplified as the material of the pedestal member 21 can be used.

[Drive control member 27]
The drive control member 27 controls the drive operation by the drive device 23. Specifically, in the drive control member 27 of the present embodiment, the rotating portion 23b of the driving device 23 rotates by the magnetic force of the repulsive force between the rotating portion 23b and the power magnetic pole portion 23a1 of the fixed portion 23a. A rotation restricting unit 32 that regulates by contacting the magnet 32 is provided. The rotation restricting portion 32 restricts the rotation of the rotating portion 23b by contacting the engaging wall portion 31 (see FIG. 12) formed on the stepped portion 23b4 (see FIG. 12) of the rotating portion 23b. can do.

The rotation restricting portion 32 of the drive control member 27 of the present embodiment regulates the rotation of the rotating portion 23b in one of the circumferential directions (counterclockwise in FIGS. 9A and 9B). The rotation of the moving portion 23b in the opposite direction to the circumferential direction (clockwise in FIGS. 9A and 9B) is not restricted. Regarding the regulation of the rotation of the rotating portion 23b in the opposite direction, the above-mentioned rotation control convex portion 21a3 (see FIG. 9B) is formed in the lower surface of the rotating portion 23b with a long hole 23b3 (see FIG. 12). It is realized by entering and hitting the wall surface that partitions the elongated hole 23b3.

More specifically, the drive control member 27 of the present embodiment includes a plate-shaped main body portion 27a, a first protruding plate portion 27b, and a second protruding plate portion 27c. The plate-shaped main body 27a is arranged on the mounting surface of the bottom plate 21a of the pedestal member 21. The first protruding plate portion 27b is continuously formed at one end of the main body portion 27a, and projects in the thickness direction of the main body portion 27a (in the present embodiment, the same direction as the thickness direction B). The second protruding plate portion 27c is continuously formed at another end of the main body portion 27a and projects in the thickness direction of the main body portion 27a. The above-mentioned rotation restricting portion 32 of the present embodiment is composed of a first protruding plate portion 27b. Further, the second protruding plate portion 27c is engaged with an operation member 29 described later. Therefore, when the operating member 29 is pressed, the second protruding plate portion 27c is pressed. As a result, the main body portion 27a and the first protruding plate portion 27b move, and the rotation restriction of the rotating portion 23b by the first protruding plate portion 27b as the rotation restricting portion 32 is released. As a result, the drive device 23 can be operated. That is, the rotating portion 23b can be rotated counterclockwise from the perspective of FIGS. 9A and 9B.

As shown in FIGS. 9A and 9B, the second protruding plate portion 27c of the present embodiment includes a leaf spring portion as an urging portion 27c1 for urging the operating member 29. The urging portion 27c1 can maintain the initial position of the operating member 29 and maintain the position where the first protruding plate portion 27b comes into contact with the rotating portion 23b to regulate the rotation.

As the material of the drive control member 27, for example, a metal plate such as iron having a spring property or stainless steel can be used.

[Circuit board 28]
As shown in FIG. 9A, the circuit board 28 is arranged on the mounting surface of the bottom plate portion 21a of the pedestal member 21. An electric circuit is formed on the circuit board 28, and the electric circuit is electrically connected to the detection member 4 (see FIG. 11 and the like) via the first electric contact portion 28a. Further, the circuit board 28 includes a second electrical contact portion 28b. The second electrical contact portion 28b is composed of terminals connected to the electrical contact portion 43a of the circuit board 43 of the cover member 12, which will be described later. As a result, the electric signal of the material to be measured detected by the detection member 4 is transmitted to the cover member 12 described later through the electric circuit of the circuit board 28 of the base member 11 and the electric circuit of the circuit board 43 of the cover member 12. It can be transmitted to the communication device 42.

[Operating member 29]
The operation member 29 constitutes an operation unit exposed to the outside of the biological information detection device as the indwelling device 1. By pushing the operating member 29 toward the internal space X (see FIG. 10), the drive control member 27 described above can be moved and the drive device 23 can be operated.

As shown in FIG. 10, the operation member 29 of the present embodiment includes a compression portion 29a, an outer end portion 29b, and a constriction portion 29c. The compression portion 29a is a portion of the indwelling device 1 in the unused state that is compressed in the thickness direction B on the inner wall that partitions the opening 21b1 of the side plate portion 21b of the pedestal member 21. Further, the outer end portion 29b is located outside the side plate portion 21b with respect to the compression portion 29a, is thicker in the thickness direction B than the opening portion 21b1, and is operated by the indwelling device 1 in an unused state. It is a part that is pressed by such as. Further, the constricted portion 29c is located between the compression portion 29a and the outer end portion 29b, and the thickness in the thickness direction B is thinner than that of the compression portion 29a and the outer end portion 29b. When the operating member 29 is pushed in the indwelling device 1 in the unused state, the inner wall for partitioning the opening 21b1 of the side plate portion 21b enters the recess defined by the constricted portion 29c (see FIG. 6). As a result, it is possible to prevent the pushed operating member 29 from returning to the initial position again. Therefore, it is suppressed that the rotation restricting portion 32 of the drive control member 27 returns to the initial position. As a result, it is possible to prevent the rotational operation of the rotating portion 23b from being hindered by contact with the rotation restricting portion 32 that is about to return to the initial position.

As the material of the operating member 29, for example, a material having flexibility such as rubber or an elastomer can be used.

<Cover member 12>
As shown in FIGS. 8 and 10, the cover member 12 includes a power storage member 41, a communication device 42, a circuit board 43, and a housing 44.

[Power storage member 41]
The power storage member 41 of the present embodiment is a button battery, but it is not limited to the button battery as long as it is a power storage member 41 capable of supplying electric power for operating the communication device 42.

[Communication device 42]
As shown in FIG. 10, the communication device 42 includes a control unit 42a and a transmission unit 42b. The control unit 42a is composed of a processor, a memory, and the like, and acquires and analyzes information on the substance to be measured detected by the detection member 4. The transmission unit 42b transmits the analysis result of the control unit 42a to an external device such as a smartphone or a computer by a command from the control unit 42a. As a result, the subject himself or a medical worker such as a doctor can confirm the measurement result by the biological information detection device as the indwelling device 1 through the external device.

[Circuit board 43]
As shown in FIG. 10, an electric circuit connected to the communication device 42 is formed on the circuit board 43. Further, as shown in FIG. 8, in the electric circuit on the circuit board 43, when the cover member 12 is mounted on the base member 11 described above, the electric circuit on the circuit board 28 of the base member 11 is the first. 2 An electrical contact portion 43a that comes into contact with the electrical contact portion 28b is provided. Therefore, in a state where the base member 11 and the cover member 12 are combined, the detection member 4 conducts with the communication device 42 through the electric circuit of the circuit board 28 and the electric circuit of the circuit board 43. The number of electrical contact portions 43a increases or decreases depending on the number of electrodes constituting the detection member 4 (three in this embodiment).

[Housing 44]
The housing 44 is an exterior member of the cover member 12, and is also an exterior member of the biological information detection device as the indwelling device 1 formed by attaching the cover member 12 to the base member 11.

The housing 44 of the present embodiment has an oval-shaped outer shape when viewed from above (see FIG. 4). Further, as shown in FIG. 10, the housing 44 of the present embodiment has an upper surface plate portion 44a and an annular peripheral side plate portion 44b protruding from the outer edge of the upper surface plate portion 44a in the thickness direction of the upper surface plate portion 44a. Be prepared. A notch 44b1 is formed in a part of the peripheral side plate portion 44b in the circumferential direction. When the cover member 12 is attached to the base member 11, the portion of the operating member 29 of the base member 11 that protrudes to the outside of the side plate portion 21b is accommodated at the position of the notch portion 44b1. As a result, the operating member 29 can be operated from the outside even in the state of the indwelling device 1 in which the cover member 12 is attached to the base member 11.

Further, as shown in FIGS. 8 and 10, an inner surface recess 44b2 is formed on the inner surface of the peripheral side plate portion 44b. The cover member 12 is attached to the base member 11 by fitting the outer surface convex portion 21b2 into the inner surface concave portion 44b2.

A power storage member 41, a communication device 42, and a circuit board 43 are arranged in a space surrounded by a peripheral side plate portion 44b on the lower surface side of the upper surface plate portion 44a.

As the material of the housing 44, for example, the same material as the above-mentioned material exemplified as the material of the pedestal member 21 can be used.

[Insert mechanism in base member 11]
Next, the insertion mechanism of the present embodiment will be described. The insertion mechanism of the present embodiment is included in the base member 11. More specifically, the insertion mechanism of the present embodiment is composed of a pedestal member 21, a drive device 23, a slider 24, and a needle holding member 25. The slider 24 as the moving portion 62 moves by operating the driving device 23 attached to the bottom plate portion 21a of the pedestal member 21. As a result, the needle member 2 that comes into contact with the curved surface 36 as the guide portion 61 in the protruding portion 21c of the pedestal member 21 rotates as the needle holding member 25 rotates. Therefore, the needle member 2 can be projected from the mounting surface 3a and the needle member 2 can be inserted into the living body.

[Guide portion 61 of the insertion mechanism in the base member 11]
As described above, the pedestal member 21 of the present embodiment includes a protruding portion 21c in which the passage 21c1 is formed (see FIG. 10 and the like). Then, the inner wall that partitions the passage 21c1 comes into contact with the needle member 2 during the insertion operation of the needle member 2 and the detection member 4 into the living body, and rotates the needle member 2 in the plane including the central axis O. That is, as shown in FIG. 10 and the like, the guide portion 61 of the present embodiment is composed of the curved surface 36 of the inner wall that partitions the passage 21c1.

[Moving portion 62 of the insertion mechanism in the base member 11]
Further, as described above, the slider 24 of the present embodiment can move in the linear moving direction C. The slider 24 of the present embodiment moves the needle member 2 in the insertion moving direction C1 which is one side of the moving direction C as a predetermined direction when the needle member 2 and the detection member 4 are inserted into the living body. It is possible. That is, as shown in FIG. 10 and the like, the moving portion 62 of the present embodiment is configured by the slider 24.

The curved surface 36 as the guide portion 61 comes into contact with the needle member 2 moving by the slider 24 as the moving portion 62 during the insertion operation of the needle member 2 and the detection member 4. As a result, the needle member 2 rotates in the plane including the central axis O. In this way, the traveling direction of the tip of the needle member 2 changes from the insertion moving direction C1 due to the curved surface 36 as the guide portion 61. At this time, the slit opening 2a of the needle member 2 does not open on the curved surface 36 side. Since the curved surface 36 does not come into contact with the detection member 4, the detection member 4 is protected.

More specifically, the curved surface 36 as the guide portion 61 is located in the thickness direction B substantially orthogonal to the moving direction C and the insertion moving direction C1 during the insertion operation of the needle member 2 and the detection member 4. Change the direction of travel of the tip. As a result, the insertion operation of the needle member 2 and the detection member 4 is stabilized.

Here, the moving portion 62 of the insertion mechanism of the present embodiment can return and move the needle member 2 in the direction opposite to the insertion moving direction C1 as a predetermined one direction. That is, the slider 24 as the moving portion 62 of the insertion mechanism of the present embodiment is not only moved in the insertion moving direction C1 during the insertion operation of the needle member 2 and the detection member 4, but also in the opposite direction of the insertion moving direction C1. It is possible to move in the removal moving direction C2. That is, the slider 24 realizes an insertion operation (state change from the state of FIG. 7A to the state of FIG. 7B) in which the needle member 2 and the detection member 4 are projected from the mounting surface 3a by moving in the insertion movement direction C1. .. Further, the slider 24 moves by returning to the removal moving direction C2 so that the needle member 2 does not protrude from the mounting surface 3a. That is, by moving the slider 24, the removal operation (state change from the state of FIG. 7B to the state of FIG. 7C) in which the needle member 2 is housed inside the device main body 3 (see FIG. 1 and the like) of the indwelling device 1 is realized. Ru.

13A, 13B, and 13C are perspective views showing a base member 11 drawn by omitting the pedestal cover member 22 (see FIG. 9A and the like). FIG. 13A shows the base member 11 in the indwelling device 1 in the unused state. FIG. 13B shows the base member 11 in a state in which the insertion mechanism is operated from the state of FIG. 13A and the needle member 2 and the detection member 4 are most projected from the mounting surface 3a (see FIG. 2 and the like). FIG. 13C shows a base in which the slider 24 is pulled out from the state of FIG. 13B and moved back to the moving direction C2, and while the detection member 4 is projected from the mounting surface 3a, only the needle member 2 is pulled back and housed inside. The member 11 is shown.

As shown in FIGS. 5, 6, 13A, and 13B, when the needle member 2 is moved in the insertion moving direction C1 by the slider 24 as the moving portion 62 of the insertion mechanism, the detection member 4 and the support member 26 are moved. The tip side portion 4a (see FIG. 11) of the detection member 4 moves in the insertion moving direction C1 together with the needle member 2 in a state of extending inside the needle member 2.

Further, as shown in FIGS. 6 and 13B, when the needle member 2 is moved in the insertion moving direction C1 by the slider 24 as the moving portion 62 of the insertion mechanism, the detection member 4 and the support member 26 are together with the needle member 2. It is rotated by the curved surface 36 of the passage 21c1 as the guide portion 61 of the insertion mechanism. As a result, when the needle member 2 returns to the removal moving direction C2 and moves, the detection member 4 changes to a posture in which the detection member 4 follows the needle member 2 and does not move.

More specifically, the support member 26 includes an engaging projection as an engaging portion 34 that engages the slider 24. The engaging protrusion as the engaging portion 34 is in a position where it overlaps with the slider 24 in the moving direction C until the state of FIG. 13A changes to the state of FIG. 13B. Therefore, the support member 26 moves following the insertion movement direction C1 together with the slider 24 by pressing the engaging projection as the engaging portion 34 by the slider 24 until the state changes from the state of FIG. 13A to the state of FIG. 13B. To do.

However, when the engaging protrusion as the engaging portion 34 is in the state of FIG. 13B, the engaging protrusion is in the thickness direction B (see FIGS. 5 and 6) from the position where it engages with the slider 24 to the position where it does not engage with the slider 24. Move to the mounting surface 3a side. This movement is generated by the rotation of the needle holding member 25 with respect to the slider 24. When the needle holding member 25 rotates, the needle member 2 also rotates. Therefore, the support member 26 supported on the outer peripheral surface of the needle member 2 also rotates. Due to the rotation of the support member 26, the interference relationship between the engaging protrusion as the engaging portion 34 of the support member 26 and the slider 24 changes. That is, the support member 26 and the detection member 4 supported by the support member 26 change to a posture in which the needle member 2 does not follow and move when the needle member 2 returns to the removal movement direction C2 and moves.

Further, when the support member 26 is in the state shown in FIG. 13B, the support member 26 sandwiches the protruding portion 21c of the pedestal member 21 and is locked to the pedestal member 21. Therefore, the return movement of the support member 26 and the detection member 4 supported by the support member 26 in the removal movement direction C2 is more reliably suppressed.

As described above, even if the slider 24 as the moving portion 62 moves back to the removal moving direction C2 and changes from the state of FIG. 13B to the state of FIG. 13C, it is supported by the support member 26 and the support member 26. The detection member 4 follows the slider 24 and does not return and move. Therefore, only the needle member 2 can be removed from the living body with the detection member 4 indwelling in the living body.

Here, the movement of the slider 24 as the moving portion 62 of FIGS. 13A, 13B, and 13C is counterclockwise in the circumferential direction of the rotating portion 23b of the drive device 23 (in the perspective of FIGS. 13A, 13B, and 13C). It is realized by rotating in the clockwise direction). In particular, the rotating portion 23b of the present embodiment rotates from the state of FIG. 13A to the state of FIG. 13B by the magnetic force of the repulsive force between the same poles. Then, when the rotating portion 23b rotates to the state shown in FIG. 13B, it rotates in one direction in the circumferential direction (counterclockwise direction in the perspective of FIGS. 13A, 13B, and 13C) as it is due to the inertial force. Due to the rotation of the rotating portion 23b due to this inertial force, the magnetic force of the attractive force between the different poles becomes large, and the rotating portion 23b remains in one direction in the circumferential direction (counterclockwise in the perspective of FIGS. 13A, 13B, 13C). It continues to rotate in the clockwise direction) and reaches the state shown in FIG. 13C. By rotating the rotating portion 23b 180 degrees in this way, the needle member 2 can be continuously inserted and removed. In the state shown in FIG. 13C, the positional relationship between the fixed portion 23a and the rotating portion 23b is stably maintained by the attractive force. Therefore, it is possible to prevent the contained needle member 2 from popping out again due to an impact or the like.

The base member 11 of this embodiment is a disposable member. On the other hand, the cover member 12 including the communication device 42 is a reusable member used for the plurality of base members 11. That is, the base member 11 is used for the same subject for a predetermined period (for example, one week). After that, when the same subject continues to use the indwelling device 1, the used base member 11 is disposed of and replaced with a new base member 11. The cover member 12 is used for both the base member 11 before replacement and the base member 11 after replacement. That is, by removing the cover member 12 from the used base member 11 and attaching the removed cover member 12 to the new base member 11, the indwelling device 1 can be made available again.

By doing so, the reuse of the needle member 2 and the detection member 4 that are inserted into the living body can be suppressed, and the storage member 41, the communication device 42, etc. that are not inserted into the living body and should be reused can be reused. Can be used.

Next, a modified example of the indwelling device 1 of the present embodiment will be described. 14 and 15 are views showing a detention device 101 as a modification of the detention device 1 of the present embodiment. The indwelling device 101 is different from the indwelling device 1 described above in the configuration of the driving device, but the other configurations are the same. Therefore, here, the driving device 123 of the indwelling device 101 will be mainly described, and the description of other configurations will be omitted.

14A, 14B, and 14C are perspective views showing a base member 111 drawn by omitting the pedestal cover member 22. FIG. 14A shows the base member 111 in the indwelling device 101 in an unused state. FIG. 14B shows a state in which the insertion mechanism is operated from the state of FIG. 14A, and the needle member 2 and the detection member 4 are most projected from the mounting surface (see FIG. 2 and the like because they are the same as the mounting surface 3a of the indwelling device 1). The base member 111 of the above is shown. FIG. 14C shows a base member 111 in a state in which the slider 24 is returned and moved from the state of FIG. 14B, and only the needle member 2 is pulled back and housed inside while the detection member 4 is projected from the mounting surface.

FIG. 15 is a diagram showing details of the driving device 123 of the base member 111. More specifically, FIG. 15 is a diagram showing a cross section of the drive device 123. As shown in FIG. 15, the drive device 123 includes an elastic member 123a and a cam member 123b that can be rotated by the elastic force of the elastic member 123a. In FIGS. 14A, 14B and 14C, the elastic member 123a is covered with the cam member 123b.

The elastic member 123a shown in FIG. 15 is composed of a mainspring, but the elastic member 123a is not particularly limited as long as it can store elastic force in the rotation direction of the cam member 123b. One end of the spring as the elastic member 123a shown in FIG. 15 is attached to the rotating shaft portion 21a2 of the pedestal member 21, and the other end is engaged with the cam member 123b. The mainspring as the elastic member 123a shown in FIG. 15 is elastically deformed by rotating it in the drawing direction (clockwise in the cross-sectional view of FIG. 14) in advance. As a result, the mainspring spring as the elastic member 123a stores restoration energy for rotating the cam member 123b in the loosening direction (counterclockwise in the cross-sectional view of FIG. 14). By releasing this restoration energy, the cam member 123b can be rotated to realize a series of operations of FIGS. 14A, 14B, and 14C. That is, the indwelling device 101 is configured to move the slider 24 (see FIG. 14A and the like) in the moving direction C by the elastic force of the mainspring spring as the elastic member 123a. In other words, the slider 24 as the moving portion 62 in the indwelling device 101 moves the needle member 2 by using an elastic force.

The indwelling device and the base member according to the present disclosure are not limited to the specific configurations shown in the above-described embodiments and modifications, and can be variously modified and modified as long as they do not deviate from the description of the claims.

The present disclosure relates to an indwelling device and a base member.

1: Indwelling device 2: Needle member 2a: Slit opening 3: Device main body 3a: Mounting surface 4: Detection member 4a: Tip side 4b: Base end side 11: Base member 12: Cover member 21: Pedestal member 21a: Bottom plate Part 21a1: Locking convex part 21a2: Rotating shaft part 21a3: Rotation control convex part 21b: Side plate part 21b1: Opening 21b2: Outer surface convex part 21b3: Contact guide part 21c: Protruding part 21c1: Passage 21c2: Engagement Recessed portion 21a3: Rotation control convex portion 22: Pedestal cover member 23: Drive member 23a: Fixed portion 23a1: Power magnetic pole portion 23a2: Curved portion 23b: Rotating portion 23b1: First magnetic pole portion 23b2: Second magnetic pole portion 23b3: Length Hole 23b4: Step portion 23b5: Engagement shaft portion 24: Slider 24a: Engagement recess 24a1: Inner wall 25: Needle holding member 26: Support member 26a: Main body portion 26a1: Insertion hole 26b: First wall portion 26c: Second wall Part 27: Drive control member 27a: Main body part 27b: First protruding plate part 27c: Second protruding plate part 27c1: Biasing part 28: Circuit board 28a: First electric contact part 28b: Second electric contact part 29: Operation Member 29a: Compressed portion 29b: Outer end portion 29c: Constricted portion 31: Engaging wall portion 32: Rotation restricting portion 33: Circular sealing member 34: Engaging portion 35: Engaging convex portion 36: Curved surface 37: Conducting wire 38 : Engagement part 41: Power storage member 42: Communication device 42a: Control part 42b: Transmission part 43: Circuit board 43a: Electrical contact part 44: Housing 44a: Top plate part 44b: Peripheral side plate part 44b1: Notch part 44b2: Inner surface recess 50a: Action electrode 50b: Reference electrode 50c: Counter electrode 61: Guide part 62: Moving part 70: Receiving part 101: Indwelling device 111: Base member 123: Drive device A: Needle member extending direction B: Thickness direction C: Slider Movement direction C1: Insertion movement direction C2: Removal movement direction O: Central axis of needle member X: Internal space BS: Living body surface

Claims (10)

The main body of the device, which has a mounting surface to be mounted on the living body,
With a needle member,
The apparatus main body includes an insertion mechanism for inserting the needle member into the living body by projecting the needle member from the mounting surface.
The insertion mechanism is an indwelling device including a guide portion that comes into contact with the needle member and rotates the needle member in a plane including the central axis of the needle member. The insertion mechanism includes a moving portion capable of moving the needle member in a predetermined direction.
The guide portion abuts on the needle member moving by the moving portion, rotates the needle member in a plane including the central axis, and sets the traveling direction of the tip of the needle member in the predetermined one direction. The indwelling device according to claim 1, which is changed from. The base end portion of the needle member can move in a direction orthogonal to the predetermined one direction with respect to the moving portion when the needle member is moving in the predetermined one direction by the moving portion. The indwelling device according to claim 2. The indwelling device according to claim 2 or 3, wherein the guide portion is substantially orthogonal to the predetermined one direction and changes the traveling direction of the tip of the needle member in a direction toward the mounting surface. Any of claims 2 to 4, wherein the guide portion is formed of an arcuate curved surface extending so as to approach the mounting surface toward the predetermined one direction in a cross section including the central axis. The indwelling device according to one. A detection member that is inserted into the living body and can detect the substance to be measured in the living body,
A support member that supports the detection member is provided.
The moving portion of the insertion mechanism can move the needle member back in a direction opposite to the predetermined one direction.
When the needle member is moved in the predetermined direction by the moving portion of the insertion mechanism, the detection member and the support member are in a state where the detection member extends inside the needle member. A posture in which the needle member moves in a predetermined direction together with the member and is rotated by the guide portion of the insertion mechanism together with the needle member so that the needle member does not follow and move when returning and moving in the opposite direction. The indwelling device according to any one of claims 2 to 5, which changes to. The indwelling device according to any one of claims 2 to 6, wherein the moving portion of the insertion mechanism moves the needle member by using a magnetic force or an elastic force. The indwelling device according to any one of claims 1 to 7, wherein the needle member is an arc needle that is curved in an arc shape and extends. The main body of the device, which has a mounting surface to be mounted on the living body,
With a needle member,
The mounting body includes an insertion mechanism that inserts the needle member into the living body by projecting the needle member from the mounting surface.
The insertion mechanism includes a moving portion capable of moving the needle member in a predetermined one direction and the opposite direction of the predetermined one direction.
The moving portion is an indwelling device that moves the needle member in the predetermined one direction by one magnetic force of attractive force and repulsive force, and moves the needle member in the opposite direction by the other magnetic force. A base member to which a cover member including a communication device can be attached and which has a mounting surface to be mounted on a living body.
Needle member and
An insertion mechanism for inserting the needle member into the living body by projecting the needle member from the mounting surface is provided.
The insertion mechanism is a base member including a guide portion that comes into contact with the needle member and rotates the needle member in a plane including the central axis of the needle member.

Images