JP7143308B2 - Insertion device and detection device - Google Patents

Description

The present disclosure relates to insertion devices and detection devices.

For example, as an insertion device used for the purpose of measuring a blood sugar level, for example, as described in Patent Document 1, there is a device that has a needle that punctures the body surface and a sensor that is inserted under the body surface by the needle. Are known. Patent Literature 1 also describes a processing device detachably attached to the insertion device. A detection device is composed of the insertion device and the processing device.

Japanese Patent No. 4870075

The insertion device as described in Patent Document 1 includes a mounting unit that is held above the body surface while holding a sensor inserted under the body surface, and a needle that is held and removed from the mounting unit immediately after the needle is removed. and an applicator to be removed. With such a configuration, it is necessary to dispose of the mounting unit and the applicator separately.

In view of such points, the first object of the present disclosure is to provide an insertion device and a detection device that can reduce the time and effort for disposal.

Also, the insertion device, such as that described in US Pat. However, it would be advantageous to be able to remove the needle more easily.

In view of such a point, the second object of the present disclosure is to provide an insertion device and a detection device that can easily remove the needle.

An insertion device as a first aspect of the present invention comprises:
a needle that penetrates the body surface;
a sensor that outputs a signal corresponding to biological information and is inserted under the body surface by the needle;
and a base that is held on the body surface while holding the sensor and the needle removed from the body surface over a period of detecting the biometric information based on the signal.

As one embodiment of the present invention, the base has a first surface that contacts the body surface when the needle pierces the body surface, and a first surface that contacts the body surface when the needle pierces the body surface. and a second surface that is in contact with the body surface over the detection period.

In one embodiment of the invention,
The base has an attachment member attached to the body surface,
The sticking member has a first sticking portion having the first surface, and a second sticking portion connected to the first sticking portion via a hinge portion and having the second surface.

In one embodiment of the invention,
The base has a base body and a cover held by the base body slidably in a first direction from the outside to the inside of the base body,
the base body can temporarily hold the needle at a puncture position protruding from the base body;
The cover is slidable in the first direction from a covering position covering the protruding portion of the needle while the needle is held at the puncture position.

In one embodiment of the invention, the base has a spring biasing the needle in the first direction.

In one embodiment of the invention, the spring biases the cover in a second direction opposite to the first direction.

An insertion device as a second aspect of the present invention comprises:
a needle that penetrates the body surface;
a sensor that is inserted under the body surface by the needle and outputs a signal according to biological information under the body surface;
a base held on the body surface;
The base has a base body and a cover held by the base body slidably in a first direction from the outside to the inside of the base body,
the base body can temporarily hold the needle at a puncture position protruding from the base body;
The cover is slidable in the first direction from a covering position covering the projecting portion of the needle while the needle is held at the puncturing position,
The base further has a spring biasing the needle in the first direction.

In one embodiment of the invention,
The base body has a needle holding portion that holds the needle at the puncture position by engaging with the needle,
The needle holding portion is disengaged from the needle by being pressed by the cover that has moved in the first direction.

In one embodiment of the invention, said sensor is an electrochemical sensor.

A detection device as one aspect of the present invention comprises:
the insertion device;
a processing device removably attached to the insertion device for processing the signals to determine data relating to the biometric information.

According to the present disclosure (particularly, the insertion device as the first aspect of the present invention), it is possible to provide an insertion device and a detection device that can reduce the trouble of disposal.

According to the present disclosure (particularly, the insertion device as the second aspect of the present invention), it is possible to provide an insertion device and a detection device that can easily remove the needle.

1 is a perspective view of an insertion device according to an embodiment of the invention; FIG. Fig. 2 is a perspective view showing the insertion device with the lid omitted; It is a front view which abbreviate|omits a cover and shows an insertion apparatus. FIG. 3B is a cross-sectional view taken along the line AA of FIG. 3A; FIG. 10 is a diagram for explaining the operation procedure of the insertion device, and shows the insertion device when it is brought into contact with the body surface (illustration of the lid is omitted). FIG. 5 is a diagram for explaining the operating procedure of the insertion device, showing the insertion device when the insertion device is pressed against the body surface from the state of FIG. 4 and the needle is piercing the body surface (illustration of the lid is omitted). FIG. 6 is a diagram for explaining the operating procedure of the insertion device, and shows the insertion device when the needle puncture is completed from the state of FIG. 5 and the needle is removed from the body surface (illustration of the lid is omitted). FIG. 7 is a diagram for explaining the operation procedure of the insertion device, showing the insertion device when it is laid down from the state of FIG. 6 and held on the body surface (illustration of the lid is omitted). FIG. 8 is a diagram for explaining the operating procedure of the insertion device, showing the insertion device when attaching the processing device in the state of FIG. 7 ; FIG. 9 is a diagram for explaining the operation procedure of the insertion device, and shows the detection device when the processing device is attached to the insertion device from the state of FIG. 8 and biometric information detection is started.

Hereinafter, an insertion device and a detection device according to an embodiment of the present invention will be illustrated in detail with reference to FIGS. 1 to 9. FIG. As used herein, the front face of the insertion device means the upper surface seen when the insertion device is laid down and held on the body surface after the needle has been removed. The back surface of the insertion device means the surface opposite to the front surface (the lower surface in contact with the body surface in the above state).

As shown in FIGS. 1 and 2, the insertion device 1 according to this embodiment has a needle 2, a sensor 3, and a base 4. As shown in FIG. In this embodiment, the base 4 has a base body 5 and a cover 6 . The base body 5 has a housing 5a and a lid 5b (see FIG. 1). The needle 2 is pierced through the body surface 7 of a living body (eg, human body) (see FIG. 5). After the sensor 3 is inserted under the body surface 7 together with the needle 2, the needle 2 alone is withdrawn and left under the body surface 7 (see FIGS. 5 and 6). The sensor 3 is configured to be subcutaneously indwelling to output a signal corresponding to biological information. The biological information is the glucose concentration in the interstitial fluid in this embodiment. Glucose concentration in interstitial fluid reflects blood glucose levels. However, the biological information may be the concentration of lactic acid or the like, the pulse, or the like. In this embodiment, the sensor 3 is an electrochemical sensor, so the signal is an electrical signal (current or voltage). The sensor 3 is not limited to an electrochemical sensor, and may be, for example, an optical sensor that outputs an optical signal (fluorescence) as the signal.

In this embodiment, as shown in FIGS. 8 and 9, a processing device 8 is detachably attached to the insertion device 1 . The processing device 8 is detachably attached to the insertion device 1 and configured to process the signals to obtain data relating to biological information. The insertion device 1 and the processing device 8 constitute a detection device 9 according to this embodiment. In this embodiment, the processing device 8 is configured as a transmitter that wirelessly transmits the determined data to an external device. In the present embodiment, the processing device 8 includes a contact connected to the contact 10 of the sensor 3 and a signal processing device connected to the contact via an A/D converter and processing the signal to obtain data related to biological information. and a wireless transmission/reception module that wirelessly transmits data obtained by the signal processing unit to an external device (not shown). Further, the processing device 8 has a CPU (Central Processing Unit), a memory, a battery (either a primary battery or a secondary battery) and the like in order to control the signal processing section and the wireless transmission/reception module. The external device may be a stationary terminal such as a desktop computer, or a mobile terminal such as a smartphone, tablet, or notebook computer. In this embodiment, the external device has a wireless transmission/reception module that wirelessly receives data transmitted by the processing device 8, and a biological information calculation unit that calculates biological information (blood sugar level) based on the received data. . Furthermore, the external device includes a CPU (Central Processing Unit), memory, power supply unit (outlet and/or battery) to control the wireless transmission/reception module and the biological information calculation unit. The battery may be a primary battery or a secondary battery. ), etc. In this embodiment, the external device also has interfaces such as an input unit, a display unit, and a speaker. The configurations of the processing device 8 and external equipment can be changed as appropriate. In this embodiment, the detector 9 and an external device constitute a continuous glucose monitoring (CGM) system. The processing device 8 may not be a transmitter that wirelessly transmits data related to biometric information. For example, the processing device 8 may be configured to wire-transmit data to an external device, or may be configured to provide data to an external device via a recording medium such as a memory card. The processing device 8 may be configured to process the signal, calculate biometric information, and inform the user of the biometric information via an interface such as a built-in display.

As shown in FIGS. 7 to 9, in this embodiment, the base 4 of the insertion device 1 holds the sensor 3 and the needle 2 pulled out from the body surface 7 over the period of detecting biological information based on the signal. It is configured to be held on the body surface 7 in a state. Therefore, at the end of the biometric detection period, the insertion device 1 can be discarded while the processing device 8 can be reused for the next detection. As described above, according to the present embodiment, the members including the needle 2 and the sensor 3 after use can be discarded at one time by discarding the insertion device 1, so that the labor for disposal can be reduced. However, the insertion device 1 is not limited to such a configuration. For example, after removing the needle 2, only the needle 2 and the sensor 3 may be removed from the base 4 and disposed of first. The detection period of the biological information may be several hours, several days, one week, one month, etc., and is appropriately determined by the judgment of a doctor or the like.

As shown in FIGS. 6 and 7, in this embodiment, the rectangular base 4 is tilted so as to be held on the body surface 7 after the needle 2 is withdrawn from the body surface 7. is possible. As shown in FIG. 3B, the base 4 has a first surface 4a and a second surface 4b, and the surface along the skin (surface to be adhered) differs between when puncturing and when detecting. In other words, the position of the base 4 with respect to the body surface 7 (the angle formed by the body surface 7 and the plane of the base 4 parallel to the puncture direction) differs between when puncturing and when detecting. The first surface 4 a is configured to contact the body surface 7 when the needle 2 is punctured into the body surface 7 . The second surface 4 b is not in contact with the body surface 7 when the needle 2 punctures the body surface 7 . The second surface 4b is configured to be in contact with the body surface 7 over the detection period. More specifically, the base 4 has an attachment member 11 attached to the body surface 7 . As shown in FIG. 7, the sticking member 11 includes a first sticking portion 11a having a first surface 4a, and a hinge portion (bent portion) 11b connected to the first sticking portion 11a and a second surface 4b. and a second sticking portion 11c. The first sticking portion 11a (and the first surface 4a) is arranged along a plane orthogonal to the axis X of the needle 2 (see FIGS. 3A and 3B) when the needle 2 is punctured. The sticking member 11 is attached to the base body 5 . The first sticking portion 11a is detachably stuck to the base body 5 . More specifically, the adhesive force of the first sticking portion 11 a to the base body 5 is smaller than the adhesive force of the first sticking portion 11 a to the body surface 7 . The second sticking portion 11 c is fixed to the base body 5 . As shown in FIG. 6, when the needle 2 is inserted and removed, the first surface 4a of the first sticking portion 11a is brought into contact with the body surface 7, so that the first surface 4a of the first sticking portion 11a is attached to the body. Affixed to surface 7 . Therefore, the insertion device 1 can be temporarily fixed (positioned) to the body surface 7 by attaching the first surface 4a to the body surface. As a result, it is possible to stabilize the operation when removing the puncture. Thereafter, as shown in FIG. 7, the base body 5 is tilted toward the body surface 7 with the hinge portion 11b (bending portion) as a fulcrum, thereby rotating the second sticking portion 11c via the hinge portion 11b. Let The base 4 is pivoted (moved) to a position along the body surface 7 , and the second sticking portion 11 c (second surface 4 b ) of the base 4 is stuck to the body surface 7 . In other words, the base 4 follows (contacts) the skin on different surfaces depending on whether the needle 2 is punctured or removed and detected. In the present embodiment, the case where the body surface 7 is punctured substantially perpendicularly is shown, but depending on the characteristics of the sensor 3 to be applied and the detection reagent, the needle 2 and the sensor 3 can be arbitrarily positioned with respect to the body surface 7. It is good also as a structure which punctures at an angle. In this case, the contact surface 6c of the cover 6 that contacts the body surface may be inclined so that the first surface 4a has a predetermined puncture angle. The sticking surface of the sticking member 11 may be provided with a liner for protecting the adhesive material on the sticking surface, and the liner may be peeled off at a desired timing. According to such a configuration, the protrusion height of the insertion device 1 and the detection device 9 from the body surface 7 during detection of biometric information can be reduced (for example, the protrusion height can be within 1 cm), and the wearing comfort and safety can be improved. can improve sexuality. Moreover, according to such a configuration, a needle 2 having a normal closed cross-sectional shape can be used without using a needle having a special shape such as a C-shaped or V-shaped cross section. Even if the needle 2 with a closed cross-section is used, there is no need for a dedicated part for connecting the sensor 3 and the contact 10, nor an operation step for such a connection, so the frequency of poor contact can be reduced. . In this embodiment, the needle 2 having a normal closed cross-sectional shape is used, so the sensor 3 can be stably placed under the body surface 7 . The first sticking portion 11a and the second sticking portion 11c may be configured as separate members, and these members may be connected via a hinge member as a hinge portion. Also, the second sticking portion 11c and the base body 5 may be detachable. In this case, the adhesive force of the second sticking portion 11 c to the base body 5 is preferably set to be greater than the adhesive force of the second sticking portion 11 c to the body surface 7 . However, the insertion device 1 is not limited to such a configuration. For example, the base 4 may be configured to be held on the body surface 7 without using the sticking member 11 as described above. The second sticking portion 11c may be configured to be fixed to the base body 5 via a rigid locking member. When the needle 2 is pierced into the body surface 7, the first sticking portion 11a and the second sticking portion 11c are stuck to the body surface 7, and then the base body 5 is attached to the body surface 7 with the hinge portion 11b as a fulcrum. It may be fixed on the second sticking portion 11c via a locking member when it is laid down to the side.

As shown in FIGS. 4 to 6, in this embodiment, the cover 6 is held by the base body 5 so as to be slidable in the first direction D1 from the outside to the inside of the base body 5 . In this embodiment, the first direction D1 is a direction (needle removal direction) from the outside of the base body 5 toward the inside along the axis X of the needle 2 . However, the first direction D1 does not have to be along the axis X of the needle 2 . In this embodiment, while the hub 2b is held by a needle holding portion 13, which will be described later, the base body 5 is temporarily positioned at the puncture position (the position shown in FIGS. 4 and 5) where the needle 2 protrudes from the base body 5. can be held indefinitely. The cover 6 is slidable in the first direction D1 as shown in FIG. 5 from the covering position (the position shown in FIG. 4) covering the projecting portion of the needle 2 while the needle 2 is held at the puncture position. be. That is, only the cover 6 moves relative to the needle 2 in the first direction D1 while the needle 2 is maintained at the puncture position. Thereby, only the needle 2 and the sensor 3 are inserted into the living body. An engagement portion may be provided between the cover 6 and the base body 5 that is released when a force exceeding a predetermined amount is applied to the cover 6 in the first direction D1. With such a configuration, the needle 2 is prevented from being exposed by the cover 6, and safety during operation of the insertion device 1 can be improved. However, the insertion device 1 is not limited to such a configuration. That is, the insertion device 1 may not have the cover 6 as described above.

As shown in FIG. 5, in this embodiment, the base 4 has a spring 12 that biases the needle 2 in the first direction D1. The spring 12 urges the needle 2 in the first direction D1 by elastic force generated by moving the cover 6 in the first direction D1. According to such a configuration, it is possible to generate an urging force for withdrawing the needle 2 by the puncturing operation. The use of such springs 12 therefore simplifies the construction. However, the insertion device 1 is not limited to such a configuration. That is, the insertion device 1 may not have the spring 12 as described above. For example, the needle 2 may be manually withdrawn without such biasing force.

As shown in FIGS. 4 and 5, in the initial state of the present embodiment, the spring 12 is configured to bias the cover 6 in the second direction D2 (puncture insertion direction) opposite to the first direction D1. It is According to such a configuration, exposure of the needle 2 can be stably prevented. From this point of view, it is preferable that the spring 12 biases the cover 6 in the second direction D2 while the cover 6 is in the covering position. However, the spring 12 need not be configured to bias the cover 6 in the second direction D2.

As shown in FIGS. 2 and 3A, the base body 5 has a needle holding portion (latch) 13 that engages with the needle 2 to hold the needle 2 at the puncture position. The needle holding portion 13 is configured to be opened (see FIGS. 5 and 6) and disengaged from the needle 2 by being pressed by the cover 6 moved in the first direction D1. According to such a configuration, only by pressing the base body 5 toward the body surface 7, the cover 6 is moved to disengage the needle holding portion 13, and the needle 2 is temporarily moved to the puncture position. Since the holding state can be eliminated, the operability can be improved. However, the insertion device 1 is not limited to such a configuration. For example, the disengagement of the needle holding portion 13 may be manually performed separately from the movement of the cover 6 .

In this embodiment, as shown in FIGS. 3A and 3B, the needle 2 has a needle body 2a having an axis X and a hub 2b connected to the proximal end of the needle body 2a. The needle body 2a has a long cylindrical shape and has a blade surface at its tip. The needle body 2a may be made of steel (eg stainless steel). The hub 2b has recesses 14 that engage with the needle holders 13 on both side surfaces. Inside the needle 2, a hollow portion is formed that penetrates from the distal end of the needle body 2a to the proximal end of the hub 2b. However, the needle 2 is not limited to such a configuration.

In this embodiment, the sensor 3 has two electrodes 3a and 3b consisting of a working electrode and a counter electrode, as shown in FIGS. 3A and 3B. Each of the electrodes 3a, 3b has a detection reagent (a glucose oxidase enzyme or a mutant thereof, or a substance that binds to glucose, etc.) that reacts with glucose at a portion below the body surface 7 that contacts the body fluid. Any detection reagent can be used as long as it can detect glucose quantitatively, and a detection method suitable for the detection reagent can be applied. Electrical contacts 15a, 15b connected to the processing device 8 are provided at the base ends of the respective electrodes 3a, 3b. The contact 10 of the sensor 3 consists of two electrical contacts 15a, 15b. A sensor 3 is arranged in the hollow portion of the needle 2 . Sensor 3 extends beyond the proximal end of needle 2 to electrical contacts 15a, 15b. Needle 2 holds sensor 3 inside needle 2 from the time of puncturing to the time of withdrawal (during use). Before puncturing (initial state), the needle 2 is located at the most distal end of the sensor 3, but when it is removed (during use), it is located closer to the proximal side than in the initial state. As for the configuration of the sensor 3, for example, the sensor 3 may be configured with three electrodes including a working electrode, a counter electrode, and a reference electrode. In this case, the number of contacts 10 is also three. The sensor 3 may also be constructed as an optical sensor. In this case, the sensor 3 may have a light guide such as an optical fiber. The light guide may have a fluorescent substance that emits fluorescence corresponding to biological information by the excitation light from the light guide at the contact portion with the bodily fluid under the body surface 7 . Contact 10 provides an optical contact.

In this embodiment, (the housing 5a of) the base body 5 has a through hole 16 through which the cover 6 is slidably penetrated along the axis X of the needle 2, as shown in FIGS. 3A and 3B. there is The (housing 5a of) the base body 5 has a pair of needle holding pieces 13a constituting the needle holding portion 13. As shown in FIG. The needle holding portion 13 has a pair of needle holding pieces 13a. Protrusions 17 that engage with recesses 14 provided on both side surfaces of the hub 2b are provided on the inner side surfaces of the pair of needle holding pieces 13a. Each of the pair of needle holding pieces 13a extends along the axis X of the needle 2 and has a cantilever shape with free ends in the second direction D2. As shown in FIG. 6, the tips of the inner side surfaces of the pair of needle holding pieces 13a are pushed by the cover 6 when the needle 2 completes the puncture, and the free ends of the pair of needle holding pieces 13a are opened (that is, the pair of needle holding pieces 13a are opened). The free ends of the needle holding pieces 13a move away from each other) and are disengaged from the hub 2b. Notches 18 for adjusting (reducing) the rigidity are provided near the fixed ends of the pair of needle holding pieces 13a. A pair of guide walls 19 extending along the axis X of the needle 2 are connected to the fixed ends of the pair of needle holding pieces 13a. When the needle 2 is disengaged from the needle holding portion 13, the needle 2 moves in the first direction D1 along the pair of guide walls 19 due to the biasing force of the spring 12. As shown in FIG. At this time, both side surfaces of the hub 2 b are guided by the pair of guide walls 19 . As shown in FIGS. 6 and 7, the pair of needle holding pieces 13a in the second direction D2 are engaged with the cover 6 when the needle holding portion 13 and the needle 2 are disengaged, and the cover 6 is closed. A cover retainer 20 is provided to prevent the cover from sliding again in the second direction D2. The cover holding portion 20 is composed of a pair of cover holding pieces 20a. Each of the pair of cover holding pieces 20a has a cantilever shape with free ends in the first direction D1. The pair of cover holding pieces 20a are elastically deformed by the cover 6 when the cover 6 slides in the first direction D1, causing the cover 6 to climb over and engaging the cover 6 with the free ends of the pair of cover holding pieces 20a. to prevent the cover 6 from sliding in the second direction D2. The cover holding piece 20a may be a protrusion having an inclined surface that gradually increases in the first direction D1. However, the base body 5 is not limited to such a configuration.

In this embodiment, as shown in FIGS. 3A, 3B, 6, and 7, the cover 6 has a tubular shape and has a hollow portion through which the needle body 2a passes. The cover 6 has a covering portion 6a (see FIG. 3B) that covers the protruding portion of the needle 2 (protruding portion from the base body 5) when the needle 2 is in the puncture position. The covering portion 6a prevents the user from contacting the blade surface of the needle 2 by covering the projecting portion of the needle 2 . A seat surface 21 is provided inside the cover 6 to receive the end of the spring 12 in the second direction D2. A pair of engaging portions 6b (see FIG. 6) made up of a pair of convex portions are provided at the ends of the cover 6 in the first direction D1. The pair of engaging portions 6b can open the free ends by engaging with the free ends of the pair of needle holding pieces 13a. Further, the pair of engaging portions 6b can prevent the cover 6 from sliding in the second direction D2 by engaging with the pair of cover holding pieces 20a. When the puncture of the needle 2 is completed, the cover 6 becomes flush with the surface of the base body 5 as shown in FIG. configured to come into contact with However, the cover 6 is not limited to such a configuration.

In this embodiment, the spring 12 is configured as a coil spring, as shown in FIGS. 4-6. An end portion of the spring 12 in the second direction D2 is received by a bearing surface 21 provided on the cover 6 . An end portion of the spring 12 in the first direction D1 is received on a bearing surface 22 provided on the hub 2b. The spring 12 applies a compressive force compressed between the cover 6 and the hub 2b as the cover 6 moves in the first direction D1 (moves into the base body 5) toward the needle 2 in the withdrawal direction from the living body. is an urging force. However, the spring 12 is not limited to such a configuration.

In this embodiment, as shown in FIGS. 8 and 9, the base 4 has a pair of operation pieces 23 for facilitating attachment/detachment to/from the processing device 8. As shown in FIGS. A pair of operation pieces 23 are provided on both sides of the base body 5 and each have a cantilever shape. Free ends of the pair of operation pieces 23 are provided with holding portions 23 a that engage with the processing device 8 to hold the processing device 8 . The holding portion 23a is formed of a convex portion provided on the outer side surface of the pair of operation pieces 23, and the processing device 8 is formed with an opening that engages with the convex portion. However, the configuration of the holding portion 23a can be changed as appropriate. For example, the holding portion 23a may be configured as an opening, and the processing device 8 may be provided with a convex portion. When the holding part 23a is engaged with the processing device 8, the contacts of the processing device 8 are connected with the contacts 10 of the sensor 3. FIG. Each of the pair of operating pieces 23 has an operating portion 23b provided with a plurality of ribs. By pressing the operation portions 23b of the pair of operation pieces 23 so as to approach each other, the pair of holding portions 23a and the processing device 8 are disengaged, and the processing device 8 can be removed from the insertion device 1. FIG. However, the base 4 is not limited to such a configuration.

In order to use the insertion device 1 according to this embodiment, first, as shown in FIGS. 5 is pressed toward the body surface 7 . By this pressing, the cover 6 slides in the first direction D1 with respect to the base body 5, the base body 5 approaches the body surface 7, and the body surface 7 is punctured by the needle 2 held at the puncture position. At that time, the biasing force of the spring 12 is increased. As shown in FIG. 6, when the cover 6 slid in the first direction D1 disengages the needle holding portion 13 from the needle 2, the needle 2 is automatically pushed into the body by the increased biasing force of the spring 12. Withdrawn from the surface 7, the hub 2b is moved up to a locking end 24 (see FIGS. 3A, 3B), fixed and housed inside the base 4. FIG. At this time, the cover 6 is fixed to the base body 5 by clamping the engaging portion 6 b between the needle holding portion 13 and the cover holding portion 20 . When the cover 6 is fixed to the cover holding portion 20, the spring 12 is held between the cover 6 (seat surface 21) and the hub 2b (seat surface 22). Since the hub 2b is prevented from moving again in the second direction D2 by fixing and locking the cover 6 to the cover holding portion 20, the used needle 2 is not exposed from the base 4. Next, as shown in FIG. 7, the base 4 is held on the body surface 7 by laying down the base 4 . Since the needle 2 is housed inside the base 4 (the cover 6 and the base body 5) before and after the puncture by the needle 2, safety is ensured. In this manner, the user can insert the sensor by simply holding the base body 5 and pressing the tip of the cover 6 against the body surface 7 . Furthermore, even if it is necessary to start using the detection device 9 outside the home, there is no needle dust generated when the detection device 9 is started (there is no need to dispose of the needle alone), so a dedicated disposal container is carried. No need. In addition, while the detecting device 9 is worn, the needle 2 after puncturing is housed inside the base 4 at a position along the body surface 7, so that the device can be made thinner. Then, as shown in FIGS. 8 and 9, by attaching the processing device 8 to the insertion device 1, detection of biometric information is started. When the biometric information detection period ends, the processing device 8 is removed from the insertion device 1 and the insertion device 1 is removed from the body surface 7 . The insertion device 1 is then discarded and the processing device 8 is reused with a new insertion device 1 for subsequent detection.

The present embodiment described above is merely an example of the embodiment of the present invention, and it goes without saying that various modifications can be made without departing from the gist of the invention.

REFERENCE SIGNS LIST 1 insertion device 2 needle 2a needle body 2b hub 3 sensor 3a, 3b electrode 4 base 4a first surface 4b second surface 5 base body 5a housing 5b lid 6 cover 6a covering portion 6b engaging portion 6c contact surface 7 body surface 8 Processing device 9 Detecting device 10 Contact 11 Sticking member 11a First sticking part 11b Hinge part 11c Second sticking part 12 Spring 13 Needle holding part 13a Needle holding piece 14 Concave part 15a, 15b Electrical contact 16 Through hole 17 Protruding part 18 Notch 19 guide wall 20 cover holding portion 20a cover holding piece 21, 22 seat surface 23 operating piece 23a holding portion 23b operating portion 24 locking end X axial center D1 first direction D2 second direction

Claims (8)

a needle that penetrates the body surface;
a sensor that outputs a signal corresponding to biological information and is inserted under the body surface by the needle;
a base held on the body surface while holding the contacts of the sensor and the needle pulled out from the body surface over a period of detection of the biological information based on the signal ;
The base has a base body and a cover held by the base body slidably in a first direction from the outside to the inside of the base body,
the base body can temporarily hold the needle at a puncture position protruding from the base body;
The insertion device , wherein the cover is slidable in the first direction from a covering position covering the protruding portion of the needle while being held at the puncturing position before the needle punctures the body surface . The base has a first surface that is in contact with the body surface when the needle pierces the body surface, and a first surface that is not in contact with the body surface when the needle is pierced into the body surface. 2. The insertion device of claim 1, having a second surface contacting the surface. The base has an attachment member attached to the body surface,
3. The sticking member according to claim 2, wherein the sticking member has a first sticking portion having the first surface, and a second sticking portion connected to the first sticking portion via a hinge portion and having the second surface. insertion device. 4. The insertion device of any one of claims 1-3 , wherein the base has a spring biasing the needle in the first direction. 5. The insertion device of claim 4 , wherein the spring biases the cover in a second direction opposite the first direction. The base body has a needle holding portion that holds the needle at the puncture position by engaging with the needle,
The insertion device according to any one of claims 1 to 5 , wherein the needle holding portion is disengaged from the needle by being pressed by the cover moved in the first direction. 7. The insertion device of any one of claims 1-6 , wherein the sensor is an electrochemical sensor. an insertion device according to any one of claims 1 to 7 ;
a processing device removably attached to the insertion device and processing the signals to determine data relating to the biometric information.

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