Capsule-shaped medicine device and charging system for capsule-shaped medicine device

Abstract

A capsule-shaped medication device 10 comprises: a capsule-shaped housing 1; a substrate 2 disposed in the interior of the housing 1; a power receiving coil 3 disposed on the substrate; and a secondary battery 4 that can be charged with power received by the power receiving coil 3. The center of gravity 11 of the capsule-shaped medication device 10 is at a position: differing from the center 12 of a cross-section 13 produced by cutting the capsule-shaped medication device 10 in a plane in which the center of gravity 11 passes through a position and which is orthogonal to a longitudinal direction of the capsule-shaped medication device 10; and overlapping with the substrate 2 when viewed in a direction orthogonal to the substrate 2.　This charging system for a capsule-shaped medication device comprises: an accommodation sheet that has a plurality of accommodation sections and a metal cover that covers opening sections of the plurality of accommodation sections; capsule-shaped medication devices 10 that are accommodated in the accommodation sections; and a charger which has a power transmission coil and on which is placed the accommodation sheet in which the capsule-shaped medication devices 10 are accommodated.

Description

Technical Field

[0001] The present invention relates to a capsule-shaped drug administration device and a charging system for the capsule-shaped drug administration device.

Background Art

[0002] There is a need for a method of confirming whether a patient has taken a prescribed drug and a method of confirming what biological reactions occur when the patient takes the drug. For this reason, the development of a drug administration device that transmits a signal from inside the body to the outside after being taken together with the drug has been promoted.

[0003] Patent Document 1 describes a system in which when a drug administration device containing a drug is taken, an electric current flows through a drive circuit included in the drug administration device via a conductive liquid such as gastric juice to transmit a signal, and the signal is received by an external receiving device, thereby detecting that the drug administration device has been taken.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] Here, a so-called gastric acid battery that passes an electric current through a drive circuit via a conductive liquid such as gastric juice is suitable for a system that requires power only for a short time, but is not suitable for a system that, for example, retains a drug administration device in the body for a long time to acquire biological information and transmits the acquired biological information to the outside of the body. For this reason, a configuration in which a small secondary battery capable of supplying power at a necessary timing is provided inside the drug administration device can be considered.

[0006] However, when a small secondary battery is provided inside a medication device, particularly a capsule-shaped medication device, it is difficult to efficiently charge such a secondary battery.

[0007] The present invention is devised to solve the above-mentioned problems, and aims to provide a capsule-shaped medication device capable of efficiently charging a secondary battery installed inside, and a charging system for a capsule-shaped medication device. [Means for solving the problem]

[0008] The capsule-shaped medication device of the present invention comprises: A capsule-shaped housing; A substrate disposed inside the housing; A receiving coil provided on the substrate; a secondary battery capable of being charged with the power received by the power receiving coil; Equipped with The center of gravity of the capsule-shaped medication device is characterized in that it is at a position different from the center of a cross section when the capsule-shaped medication device is cut in a plane that passes through the position of the center of gravity and is perpendicular to the longitudinal direction of the capsule-shaped medication device, and is at a position that overlaps with the substrate when viewed in a direction perpendicular to the substrate.

[0009] The charging system for the capsule-shaped medication device of the present invention comprises: A storage sheet having a plurality of storage sections and a metal cover covering the openings of the plurality of storage sections; The capsule-shaped medication device according to any one of claims 1 to 7, which is accommodated in the accommodation section of the accommodation sheet; a charger having a power transmission coil, on which the storage sheet having the capsule-shaped medication device stored in the storage portion is placed; The present invention is characterized by comprising: Effect of the Invention

[0010] When the capsule-shaped medication device of the present invention is placed on a charger having a power transmission coil, the power reception coil and the power transmission coil do not have an orthogonal positional relationship, so that efficient wireless power supply can be performed and the secondary battery can be efficiently charged. Further, when the capsule-shaped medication device is placed on a charger having a power transmission coil, the relative positional relationship between the power transmission coil and the power reception coil is uniquely determined, so that charging variation during wireless charging can be suppressed.

[0011] According to the charging system of the capsule-shaped medication device of the present invention, by simply placing a housing sheet in which the capsule-shaped medication device is housed on a charger having a power transmission coil, charging can be performed with high charging efficiency.

Brief Description of the Drawings

[0012]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Embodiments for Carrying Out the Invention

[0013] Hereinafter, embodiments of the present invention will be shown to specifically explain the features of the present invention.

[0014] The capsule-shaped drug delivery device 10 in one embodiment is taken together with a drug and can transmit, for example, biological information outside the body. The drug taken together with the capsule-shaped drug delivery device 10 is an arbitrary drug.

[0015] FIG. 1(a) is a side view schematically showing a capsule-shaped medication device 10 in one embodiment. FIG. 1(b) is a cross-sectional view schematically showing the configuration when the capsule-shaped medication device 10 shown in FIG. 1(a) is cut along line 1B-1B. FIG. 1(c) is a cross-sectional view schematically showing the configuration when the capsule-shaped medication device 10 shown in FIG. 1(a) is cut along line 1C-1C. In FIGS. 1(a) to 1(c), the X-axis direction is the longitudinal direction of the capsule-shaped medication device 10, and the Y-axis direction is the short-side direction. Also, the Z-axis is an axis orthogonal to the X-axis and the Y-axis, respectively.

[0016] The capsule-shaped medication device 10 in one embodiment includes a capsule-shaped housing 1, a substrate 2, a power receiving coil 3, and a secondary battery 4.

[0017] The housing 1 is made of, for example, a biocompatible resin or a general-purpose resin coated with a biocompatible material on its surface. As the biocompatible resin, for example, an epoxy resin can be used. As the material used for the housing 1, a material that can be discharged outside the body without being dissolved by gastric acid or the like after the capsule-shaped medication device 10 is taken into the body is preferably used.

[0018] The substrate 2 is disposed inside the housing 1. The substrate 2 disposed inside the housing 1 may be one sheet or a plurality of sheets. For example, as the substrate 2, a substrate provided with the power receiving coil 3, a substrate provided with the secondary battery 4, and a substrate provided with a control IC may be provided.

[0019] The power receiving coil 3 is for wireless power supply in pair with the power transmitting coil and is provided on the substrate 2. The power receiving coil 3 is made of, for example, copper. As the wireless power supply, wireless power supply using electromagnetic induction technology or magnetic field resonance technology can be performed. Note that magnetic field resonance is a kind of electromagnetic induction because a current flows through the power receiving coil 3 in response to the change in the magnetic field created by the power transmitting coil. FIG. 2 is a plan view schematically showing the shape of the power receiving coil 3 provided on the substrate 2. Although omitted in FIG. 2, the power receiving coil 3 is connected to the secondary battery 4.

[0020] The secondary battery 4 can be charged with the power received by the power receiving coil 3. The secondary battery 4 can be any rechargeable battery, for example, an all-solid-state battery having a solid electrolyte. The secondary battery 4 is provided, for example, on the substrate 2 where the power receiving coil 3 is provided. However, the position where the secondary battery 4 is provided is not limited to above the substrate 2 where the power receiving coil 3 is provided.

[0021] The capsule-shaped medication device 10 may further include a biological information acquisition unit 5 and a signal transmission unit 6. Power is supplied to the biological information acquisition unit 5 and the signal transmission unit 6 from the secondary battery 4. FIG. 1 shows a configuration in which the biological information acquisition unit 5 and the signal transmission unit 6 are provided on the substrate 2 where the power receiving coil 3 is provided, but the position where the biological information acquisition unit 5 and the signal transmission unit 6 are provided is not limited to above the substrate 2.

[0022] The biological information acquisition unit 5 acquires biological information such as the position of the capsule-shaped medication device 10 in the body and the body temperature when taken with the drug. For example, the biological information acquisition unit 5 has a timekeeping means capable of measuring time, measures the time elapsed since the capsule-shaped medication device 10 was taken into the body, and estimates the position of the capsule-shaped medication device 10 in the body according to the measured time. As another example, the biological information acquisition unit 5 includes a temperature sensor and detects the body temperature. Note that the biological information includes all information related to the living body, and the biological information acquisition unit 5 can be configured to acquire any biological information.

[0023] The signal transmission unit 6 transmits the biological information acquired by the biological information acquisition unit 5. That is, after the capsule-shaped medication device 10 is taken into the body, the signal transmission unit 6 transmits the biological information acquired by the biological information acquisition unit 5 to the outside of the body. The signal transmission unit 6 is, for example, a piezoelectric element and transmits the biological information as an ultrasonic signal. As the material of the piezoelectric element, it is possible to use PZT (lead zirconate titanate), BT (barium titanate), KNN (potassium sodium niobate), etc. In that case, the capsule-shaped medication device 10 includes an IC for controlling the piezoelectric element. When the signal transmission unit 6 is a piezoelectric element, the biological information can be reliably transmitted to the outside of the body as an ultrasonic signal. The signal transmitted from the signal transmission unit 6 is received by a signal reception unit provided outside the body.

[0024] Note that when the signal transmission unit 6 is a piezoelectric element and transmits an ultrasonic signal, if the vibration mode is the transverse displacement type (d31 mode), the longer the length of the piezoelectric element, the stronger the ultrasonic signal can be. Since the capsule-shaped medication device 10 in the present embodiment has a capsule type shape, it is possible to accommodate a piezoelectric element with a long length inside, and it is possible to transmit a strong ultrasonic signal.

[0025] However, the signal transmission unit 6 is not limited to a piezoelectric element. For example, the signal transmission unit 6 may be configured to transmit biological information by wireless communication.

[0026] As described above, power is supplied from the secondary battery 4 to the biological information acquisition unit 5 and the signal transmission unit 6. By supplying power to the biological information acquisition unit 5 from the secondary battery 4 instead of the gastric acid battery, the biological information acquisition unit 5 can acquire biological information at any position in the body. Also, by supplying power to the signal transmission unit 6 from the secondary battery 4 instead of the gastric acid battery, the signal transmission unit 6 can transmit biological information at any position in the body.

[0027] FIG. 1(c) shows a cross-sectional view 13 when the capsule-shaped drug administration device 10 is cut along a plane passing through the position of the center of gravity 11 of the capsule-shaped drug administration device 10 and perpendicular to the longitudinal direction of the capsule-shaped drug administration device 10. In the present embodiment, as shown in FIG. 1(c), the cross-sectional view 13 is circular. Note that the center of gravity 11 of the capsule-shaped drug administration device 10 can be obtained by a known method.

[0028] In the capsule-shaped drug administration device 10 in the present embodiment, as shown in FIG. 1(c), the center of gravity 11 of the capsule-shaped drug administration device 10 is at a position different from the center 12 of the cross-sectional view 13 when the capsule-shaped drug administration device 10 is cut along a plane passing through the position of the center of gravity 11 and perpendicular to the longitudinal direction of the capsule-shaped drug administration device 10, and as shown in FIG. 1(b), it is at a position overlapping the substrate 2 when viewed in a direction perpendicular to the substrate 2.

[0029] As an example, the housing 1 is configured by combining a first divided housing 1a and a second divided housing 1b. FIG. 3 shows the first divided housing 1a and the second divided housing 1b before combination. Also, in FIG. 3, for the purpose of showing an example of the arrangement position of the substrate 2 as described later, the substrate 2 is shown by a dotted line.

[0030] The first divided housing 1a and the second divided housing 1b have a shape obtained by cutting the housing 1 along a plane passing through the center in the short-side direction of the housing 1 and parallel to the longitudinal direction. The first divided housing 1a and the second divided housing 1b can be manufactured, for example, by a manufacturing method using injection molding or a 3D printer. The first divided housing 1a and the second divided housing 1b can be combined using an adhesive or the like.

[0031] In order to make the center of gravity 11 of the capsule-shaped medicine device 10 different from the center 12 of the above-described cutting plane 13, for example, the weight of the first divided housing 1a and the weight of the second divided housing 1b are configured to be different. For example, by making the weight of the second divided housing 1b heavier than the weight of the first divided housing 1a, the center of gravity 11 of the capsule-shaped medicine device 10 can be adjusted to be located on the side of the second divided housing 1b. In this way, since the housing 1 is configured by combining the first divided housing 1a and the second divided housing 1b, and the weight of the first divided housing 1a and the weight of the second divided housing 1b are made different, the position of the center of gravity 11 of the capsule-shaped medicine device 10 can be easily set to a desired position.

[0032] In order to make the weight of the first divided housing 1a and the weight of the second divided housing 1b different, for example, a weight may be provided on either one of the first divided housing 1a and the second divided housing 1b. In order for the center of gravity 11 of the capsule-shaped medicine device 10 to be at a position overlapping the substrate 2 when viewed in a direction orthogonal to the substrate 2, the weight is preferably provided at a position where at least a part thereof overlaps the substrate 2 when viewed in a direction orthogonal to the substrate 2, and more preferably provided at a position where the whole overlaps the substrate 2.

[0033] As shown in FIG. 3, the substrate 2 may be provided inside the second divided housing 1b, or may be provided inside the first divided housing 1a. The substrate 2 may be arranged inside the second divided housing 1b or the first divided housing 1a by fitting, or may be arranged using screws, adhesives, double-sided tapes, or the like.

[0034] Instead of providing the weight on either one of the first divided housing 1a and the second divided housing 1b, it may be provided on the substrate 2, and the substrate 2 provided with the weight may be arranged inside either one of the first divided housing 1a and the second divided housing 1b.

[0035] FIG. 4 is a side cross-sectional view schematically showing the configuration of a charging system 100 for a capsule-shaped medication device. The charging system 100 for a capsule-shaped medication device includes a capsule-shaped medication device 10, a housing sheet 20, and a charger 30.

[0036] The housing sheet 20 has a plurality of housing portions 21 and a metal cover 22 that covers the openings of the plurality of housing portions 21. The housing sheet 20 is, for example, a PTP sheet (Press Through Pack Sheet). Among them, the portion constituting the housing portion 21 of the housing sheet 20 is made of, for example, resin, and the metal cover 22 is made of, for example, aluminum.

[0037] The capsule-shaped medication device 10 is housed in the housing portion 21 of the housing sheet 20. FIG. 4 shows a state in which the capsule-shaped medication device 10 is housed from the opening of the housing portion 21 and the opening is covered with the metal cover 22. As shown in FIG. 4, one capsule-shaped medication device 10 is housed in each housing portion 21. However, a plurality of capsule-shaped medication devices 10 may be housed in one housing portion 21.

[0038] Alternatively, one housing portion 21 may house a drug to be taken at one time and the capsule-shaped medication device 10. When there are a plurality of drugs to be taken at one time, one housing portion 21 can house a plurality of drugs and one capsule-shaped medication device 10.

[0039] The secondary battery 4 of the capsule-shaped medication device 10 housed in the housing portion 21 of the housing sheet 20 can be charged by a charger 30. The charger 30 has a power transmission coil 31 for wireless power supply. A plurality of power transmission coils 31 may be provided in the charger 30, or only one may be provided. When charging the secondary battery 4 of the capsule-shaped medication device 10, the housing sheet 20 in which the capsule-shaped medication device 10 is housed in the housing portion 21 is placed on the placement surface 30a of the charger 30. As shown in FIG. 4, the portion where the housing sheet 20 contacts the charger 30 is on the side opposite to the metal cover 22. When an electric current flows through the power transmission coil 31 of the charger 30 in this state, an electric current flows through the power receiving coil 3 of the capsule-shaped medication device 10 by electromagnetic induction, and the secondary battery 4 is charged.

[0040] The power transmission coil 31 is preferably provided on the placement surface 30a of the charger 30 on which the housing sheet 20 is placed, or at a position close to the placement surface 30a. By providing the power transmission coil 31 on the placement surface 30a of the charger 30 or at a position close to the placement surface 30a, the distance between the power transmission coil 31 and the power receiving coil 3 of the capsule-shaped medication device 10 becomes short, so that wireless charging can be performed with high charging efficiency.

[0041] As described above, the portion where the housing sheet 20 contacts the charger 30 when charging the secondary battery 4 of the capsule-shaped medication device 10 is on the side opposite to the metal cover 22. That is, as shown in FIG. 4, the housing sheet 20 is placed on the placement surface 30a of the charger 30 so that the portion of the housing sheet 20 opposite to the metal cover 22 faces the placement surface 30a of the charger 30. By performing charging in this state, the side where the metal cover 22 is provided, that is, the housing sheet 20 is less affected by electromagnetic waves from the side opposite to the charger 30, so that charging can be performed efficiently.

[0042] In the charging system 100 of the capsule-shaped medication device of the present invention, the charging of the capsule-shaped medication device 10 housed in the housing portion 21 of the housing sheet 20 can be performed by the patient who takes the medication himself / herself or at a pharmacy that delivers the capsule-shaped medication device 10 to the patient together with the medication.

[0043] As described above, in the capsule-shaped medication device 10 in the present embodiment, its center of gravity 11 is at a position different from the center 12 of the cross-sectional plane 13 when the capsule-shaped medication device 10 is cut by a plane passing through the position where the center of gravity 11 is located and orthogonal to the longitudinal direction, and is at a position overlapping the substrate 2 when viewed in a direction orthogonal to the substrate 2. With such a configuration, when the capsule-shaped medication device 10 is placed on the placement surface 30a of the charger 30, wireless power supply can be efficiently performed, and the secondary battery 4 can be efficiently charged. This will be described with reference to FIG. 5.

[0044] FIG. 5(a) is a side cross-sectional view schematically showing the posture when charging the capsule-shaped medication device 10 in the present embodiment, FIG. 5(b) is a side cross-sectional view schematically showing the posture when charging the capsule-shaped medication device 10X in which the center of gravity 11X coincides with the center 12X of the above-described cross-sectional plane 13X, and FIG. 5(c) is a side cross-sectional view schematically showing the posture when charging the capsule-shaped medication device 10Y in which the center of gravity 11Y is at a position different from the center 12Y of the above-described cross-sectional plane 13Y but does not overlap the substrate 2Y when viewed in a direction orthogonal to the substrate 2Y. In FIGS. 5(a) to 5(c), the charger 30 is omitted, but as in FIG. 4, the state where the capsule-shaped medication devices 10, 10X, and 10Y are placed on the placement surface 30a of the charger 30 is shown. That is, in FIGS. 5(a) to 5(c), the charger 30 is located vertically below the capsule-shaped medication devices 10, 10X, and 10Y.

[0045] The capsule-shaped drug delivery device 10X shown in Fig. 5(b) and the capsule-shaped drug delivery device 10Y shown in Fig. 5(c) are not the capsule-shaped drug delivery devices of the present invention. Here, among the components of the capsule-shaped drug delivery device 10X, the components corresponding to those of the capsule-shaped drug delivery device 10 are described by adding X to the same reference numerals. Also, among the components of the capsule-shaped drug delivery device 10Y, the components corresponding to those of the capsule-shaped drug delivery device 10 are described by adding Y to the same reference numerals.

[0046] As shown in Fig. 5(b), when the center of gravity 11X of the capsule-shaped drug delivery device 10X coincides with the center 12X of the above-described cutting plane 13X, when the capsule-shaped drug delivery device 10X is placed on the placement surface 30a of the charger 30, the capsule-shaped drug delivery device 10X can rotate around the center line passing through the center of gravity 11X and parallel to the longitudinal direction. For this reason, the capsule-shaped drug delivery device 10X is in a state where it is easy to rotate and move within the accommodating portion 21 of the accommodating sheet 20, and the relative positional relationship between the power transmission coil 31 of the charger 30 and the power reception coil 3X of the capsule-shaped drug delivery device 10X is not uniquely determined. Therefore, as shown in Fig. 5(b), the substrate 2X of the capsule-shaped drug delivery device 10X may be in a positional relationship orthogonal to the placement surface 30a of the charger 30. In this case, since the power reception coil 3X provided on the substrate 2X and the power transmission coil 31 of the charger 30 are in a positional relationship orthogonal to each other, the power supply efficiency of wireless power supply becomes low, and thus the charging efficiency of the secondary battery 4X becomes low. Also, as described above, since the capsule-shaped drug delivery device 10X is in a state where it is easy to rotate and move within the accommodating portion 21 of the accommodating sheet 20, when charging the secondary batteries 4X of a plurality of capsule-shaped drug delivery devices 10X due to differences in posture, charging variations occur.

[0047] Also, as shown in FIG. 5(c), although the center of gravity 11Y of the capsule-shaped medication device 10Y is at a position different from the center 12Y of the above-described cut surface 13Y, when viewed in the direction orthogonal to the substrate 2Y, if it is at a position where it does not overlap with the substrate 2Y, the angle between the placement surface 30a of the charger 30 and the substrate 2Y becomes large. Therefore, among the magnetic fluxes generated when an electric current flows through the power transmission coil 31, the amount passing through the power reception coil 3Y becomes small. For this reason, the power supply efficiency of wireless power supply becomes low, and the charging efficiency of the secondary battery 4X becomes low.

[0048] On the other hand, in the capsule-shaped medication device 10 of the present embodiment, the center of gravity 11 is at a position different from the center 12 of the above-described cut surface 13 and, when viewed in the direction orthogonal to the substrate 2, is at a position where it overlaps with the substrate 2. When placed on the charger 30, the relative positional relationship between the power transmission coil 31 and the power reception coil 3 is uniquely determined. That is, with respect to the center 12 of the above-described cut surface 13, the center of gravity 11 is at a position vertically below, so the angle formed by the placement surface 30a of the charger 30 and the substrate 2 does not vary. Therefore, it is possible to suppress charging variations when wireless charging is performed on the secondary batteries 4 of the plurality of capsule-shaped medication devices 10 respectively housed in the plurality of housing portions 21 of the housing sheet 20.

[0049] Also, the capsule-shaped medication device 10 in the present embodiment, when placed on the charger 30, does not have a positional relationship as shown in FIG. 5(b), that is, a positional relationship in which the power reception coil 3 and the power transmission coil 31 are orthogonal. Therefore, wireless power supply can be performed efficiently, and the secondary battery 4 can be charged efficiently.

[0050] Further, as shown in Fig. 5(a), the center of gravity 11 of the capsule-shaped medicine device 10 is preferably located on a reference line 14 that passes through the center 12 of the above-described cut surface 13 and extends in a direction perpendicular to the substrate 2. When the center of gravity 11 of the capsule-shaped medicine device 10 is located on the reference line 14 that passes through the center 12 of the above-described cut surface 13 and extends in a direction perpendicular to the substrate 2, in a state where the capsule-shaped medicine device 10 is placed on the placement surface 30a of the charger 30, the placement surface 30a of the charger 30 and the substrate 2 of the capsule-shaped medicine device 10, more specifically, the main surface of the substrate 2 on which the power receiving coil 3 is provided, are positioned parallel to each other. Therefore, since the power receiving coil 3 and the power transmitting coil 31 are in a parallel positional relationship with each other, wireless power supply can be performed with the highest power supply efficiency, and the secondary battery 4 can be charged most efficiently.

[0051] Here, by changing the position of the center of gravity 11, the angle θ (see Fig. 6) between the line 15 connecting the center of gravity 11 of the capsule-shaped medicine device 10 and the center 12 of the above-described cut surface 13 and the reference line 14 that passes through the center 12 of the cut surface 13 and extends in a direction perpendicular to the substrate 2 was changed, and the voltage when wireless power supply was performed using the charger 30 was examined. The results of the examination are shown in Fig. 7. The horizontal axis in Fig. 7 is the above-described angle θ, and the vertical axis indicates the output voltage of the rectifier bridge circuit installed downstream of the power receiving coil 3. When the output voltage of the rectifier bridge circuit is high, a booster circuit for fully charging the secondary battery 4 becomes unnecessary, and the number of components can be reduced. Charging from the rectifier bridge circuit to the secondary battery 4 is preferably performed with a linear regulator (LDO) for stably charging the secondary battery 4, or in a state where a charge monitoring IC or the like is installed. Even when a linear regulator is provided, the effect of the high output voltage of the rectifier bridge circuit is exhibited.

[0052] As shown in FIG. 7, when the angle θ between the line 15 connecting the center of gravity 11 of the capsule-shaped drug delivery device 10 and the center 12 of the above-described cut surface 13 and the reference line 14 is 0°, that is, as shown in FIG. 5(a), when the center of gravity 11 of the capsule-shaped drug delivery device 10 is located on the reference line 14, the output voltage of the rectifier bridge circuit is the highest. On the other hand, when the angle θ is 90°, that is, as shown in FIG. 5(b), when the substrate 2 and the mounting surface 30a of the charger 30 are in an orthogonal positional relationship, the output voltage of the rectifier bridge circuit is the lowest.

[0053] Also, as shown in FIG. 7, when the angle θ is 75° or less, the output voltage of the rectifier bridge circuit is 60% or more based on the output voltage of the rectifier bridge circuit when the angle θ is 0°. Therefore, the angle θ between the line 15 connecting the center of gravity 11 of the capsule-shaped drug delivery device 10 and the center 12 of the above-described cut surface 13 and the reference line 14 passing through the center 12 of the cut surface 13 and extending in a direction orthogonal to the substrate 2 is preferably 75° or less.

[0054] Also, as shown in FIG. 7, when the angle θ is 45° or less, the output voltage of the rectifier bridge circuit is 80% or more based on the output voltage of the rectifier bridge circuit when the angle θ is 0°. Therefore, the angle θ between the line 15 connecting the center of gravity 11 of the capsule-shaped drug delivery device 10 and the center 12 of the above-described cut surface 13 and the reference line 14 passing through the center 12 of the cut surface 13 and extending in a direction orthogonal to the substrate 2 is more preferably 45° or less.

[0055] Note that even when the angle θ is large, it is possible to increase the output voltage of the rectifier bridge circuit by increasing the voltage applied to the power transmission coil 31 of the charger 30. However, when the voltage applied to the power transmission coil 31 is increased, the electromagnetic field strength increases, and there is a possibility of affecting other electronic components. For this reason, in order to increase the output voltage of the rectifier bridge circuit without increasing the voltage applied to the power transmission coil 31, it is preferable that the angle θ be 75° or less, and more preferably 45° or less.

[0056] The present invention is not limited to the above-described embodiments, and various applications and modifications can be made within the scope of the present invention.

[0057] The capsule-shaped medication device and the charging system for the capsule-shaped medication device in the present application are as follows. <1>. A capsule-shaped medication device, a capsule-shaped housing, a substrate disposed inside the housing, a power receiving coil provided on the substrate, a secondary battery that can be charged with the power received by the power receiving coil, and the center of gravity of the capsule-shaped medication device is at a position different from the center of the cross-sectional plane when the capsule-shaped medication device is cut by a plane passing through the position of the center of gravity and orthogonal to the longitudinal direction of the capsule-shaped medication device, and is at a position overlapping the substrate when viewed in a direction orthogonal to the substrate. A capsule-shaped medication device characterized by this. <2>. The angle between the line connecting the center of gravity of the capsule-shaped medication device and the center of the cross-sectional plane and a reference line passing through the center of the cross-sectional plane and extending in a direction orthogonal to the substrate is 75° or less. The capsule-shaped medication device according to <1>. <3>. The angle between the line connecting the center of gravity of the capsule-shaped medication device and the center of the cross-sectional plane and the reference line is 45° or less. The capsule-shaped medication device according to <2>. <4>. The center of gravity of the capsule-shaped medication device is located on a reference line passing through the center of the cross-sectional plane and extending in a direction orthogonal to the substrate. The capsule-shaped medication device according to any one of <1> to <3>. <5>. A biological information acquisition unit for acquiring biological information, a signal transmission unit for transmitting the biological information acquired by the biological information acquisition unit, and further comprising. The capsule-shaped medication device according to any one of <1> to <4>. <6>. The signal transmitting unit is a piezoelectric element, and the capsule-shaped drug-taking device according to <5>. <7>. The housing is configured by combining a first divided housing and a second divided housing, The capsule-shaped drug-taking device according to any one of <1> to <6>, characterized in that the weight of the first divided housing is different from the weight of the second divided housing. <8>. A storage sheet having a plurality of storage portions and a metal cover covering the openings of the plurality of storage portions, The capsule-shaped drug-taking device according to any one of <1> to <7> accommodated in the storage portion of the storage sheet, A charger having a power transmission coil, on which the storage sheet in which the capsule-shaped drug-taking device is accommodated in the storage portion is placed, A charging system for a capsule-shaped drug-taking device, characterized by comprising: <9>. The charging system for a capsule-shaped drug-taking device according to <8>, characterized in that the portion where the storage sheet contacts the charger when charging the secondary battery is on the side opposite to the metal cover.

Explanation of reference numerals

[0058] 1 Housing 1a First divided housing 1b Second divided housing 2 Substrate 3 Power receiving coil 4 Secondary battery 5 Biological information acquisition unit 6 Signal transmitting unit 10 Capsule-shaped drug-taking device 11 Center of gravity of the capsule-shaped drug-taking device 12 Center of the cross-sectional plane when the capsule-shaped drug-taking device is cut by a plane passing through the position of the center of gravity and perpendicular to the longitudinal direction 13 Cross-sectional plane when the capsule-shaped drug-taking device is cut by a plane passing through the position of the center of gravity and perpendicular to the longitudinal direction 14 Reference line 20 Storage sheet 21 Storage portion 22 Metal cover 30 Charger 31 Power transmission coil 100 Charging system for capsule-shaped medication device

Claims

1. A capsule-shaped medication device, comprising a capsule-shaped housing, a flat substrate disposed inside the housing, a power receiving coil provided on the substrate parallel to the main surface of the substrate, a secondary battery that can be charged with the power received by the power receiving coil, and the center of gravity of the capsule-shaped medication device is at a position different from the center of the cross-sectional plane when the capsule-shaped medication device is cut by a plane passing through the position where the center of gravity is located and orthogonal to the longitudinal direction of the capsule-shaped medication device, and is at a position overlapping the substrate when viewed in a direction orthogonal to the substrate, The capsule-shaped medication device is characterized in that it includes only the power receiving coil provided on the substrate parallel to the main surface of the substrate as the power receiving coil.

2. The capsule-shaped medication device according to claim 1, wherein the angle between the line connecting the center of gravity of the capsule-shaped medication device and the center of the cross-sectional plane and a reference line passing through the center of the cross-sectional plane and extending in a direction orthogonal to the substrate is 75° or less.

3. The capsule-shaped medication device according to claim 2, wherein the angle between the line connecting the center of gravity of the capsule-shaped medication device and the center of the cross-sectional plane and the reference line is 45° or less.

4. The capsule-shaped medication device according to any one of claims 1 to 3, wherein the center of gravity of the capsule-shaped medication device is located on a reference line passing through the center of the cross-sectional plane and extending in a direction orthogonal to the substrate.

5. further comprising a biological information acquisition unit for acquiring biological information, and a signal transmission unit for transmitting the biological information acquired by the biological information acquisition unit, The capsule-shaped medication device according to any one of claims 1 to 3.

6. The capsule-shaped medication device according to claim 5, wherein the signal transmission unit is a piezoelectric element.

7. The housing is configured by combining a first split housing and a second split housing, The capsule-shaped medication device according to any one of claims 1 to 3, wherein the weight of the first split housing is different from the weight of the second split housing.

8. a storage sheet having a plurality of storage portions and a metal cover covering the openings of the plurality of storage portions, the capsule-shaped medication device according to any one of claims 1 to 3 accommodated in the storage portion of the storage sheet, A charger having a power transmission coil, on which a housing sheet in which the capsule-shaped medicine-taking device is housed is placed in the housing part, A charging system for a capsule-shaped medicine-taking device, characterized by comprising the above.

9. The charging system for a capsule-shaped medicine-taking device according to claim 8, characterized in that a part where the housing sheet contacts the charger when charging the secondary battery is on the side opposite to the metal cover.

Images