Capsule-shaped medicine taking equipment and charging system of capsule-shaped medicine taking equipment

Abstract

A capsule-shaped medicine taking device (10) is provided with: a capsule-shaped housing (1); a substrate (2) disposed inside the case; a power receiving coil (3) provided on the substrate; and a secondary battery (4) that can be charged by the power received by the power receiving coil. The center of gravity (11) of the capsule-shaped medicine-taking device is located at a position different from the center (12) of a cut surface (13) when the capsule-shaped medicine-taking device is cut by a plane that passes through the position of the center of gravity (11) and is orthogonal to the longitudinal direction of the capsule-shaped medicine-taking device, and is located at a position overlapping the substrate (2) when viewed in the direction orthogonal to the substrate (2). This charging system for a capsule-shaped medicine-taking device is provided with: a storage sheet having a plurality of storage sections and a metal cover that covers the openings of the plurality of storage sections; a capsule-shaped medicine taking device (10) housed in the housing part; and a charger which has a power transmission coil and on which a storage sheet in which the capsule-shaped medicine taking device (10) is stored is placed.

Description

Technical Field

[0001] The invention relates to a capsule-shaped medication device and a charging system for the capsule-shaped medication device. Background Art

[0002] There is a need for methods to confirm whether a patient has taken a prescribed drug and for methods to confirm what biological reactions have occurred as a result of the patient taking the drug. Therefore, the development of medication devices that transmit signals from the body to the outside of the body after being taken together with the drug is progressing.

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

[0004] Patent Document 1: Japanese Patent No. 5730822

[0005] Here, the so-called gastric acid battery in which electric current flows through the driving 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 in which, for example, a medication device is retained in the body for a long time to obtain biological information and transmit the obtained biological information to the outside of the body. Therefore, a structure in which a small secondary battery capable of supplying power at a necessary timing is provided in the medication device is 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. Summary of the invention

[0007] The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a capsule medication device and a charging system for the capsule medication device that can efficiently charge a secondary battery provided inside.

[0008] The capsule-shaped medication device of the present invention is characterized in that it comprises: a capsule-shaped shell; a substrate arranged inside the above-mentioned shell; a power receiving coil arranged on the above-mentioned substrate; and a secondary battery capable of being charged using the power received by the above-mentioned power receiving coil, and the center of gravity of the above-mentioned capsule-shaped medication device is located at a position different from the center of a cut surface when the capsule-shaped medication device is cut by a plane passing through the position where the center of gravity is located and perpendicular to the long side direction of the above-mentioned capsule-shaped medication device, and is located at a position overlapping with the above-mentioned substrate when viewed in a direction perpendicular to the above-mentioned substrate.

[0009] The charging system of the capsule-shaped medication device of the present invention is characterized in that it 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 recorded in any one of technical solutions 1 to 7 being stored in the storage section of the storage sheet; and a charger having a power transmission coil and being provided for carrying the storage sheet having the capsule-shaped medication device stored in the storage section.

[0010] When the capsule-shaped medication device of the present invention is placed on a charger having a power transmission coil, the power receiving coil and the power transmission coil are not in an orthogonal positional relationship, so wireless power supply can be efficiently performed and the secondary battery can be efficiently charged. In addition, when placed on a charger having a power transmission coil, the relative positional relationship between the power transmission coil and the power receiving coil is uniquely determined, so charging deviation during wireless charging can be suppressed.

[0011] According to the charging system of the capsule-shaped medication device of the present invention, charging can be performed at a high charging efficiency simply by placing the storage sheet having the capsule-shaped medication device stored in the storage section on the charger having the power transmission coil. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 (a) is a side view schematically showing a capsule-shaped medication device in one embodiment, Figure 1 (b) schematically shows a cut along line 1B-1B. Figure 1 (a) is a cross-sectional view of the structure of the capsule-shaped medication device, Figure 1 (c) schematically shows the cutting along line 1C-1C. Figure 1 (a) is a cross-sectional view of the structure of the capsule-shaped medication device shown.

[0013] Figure 2 It is a plan view schematically showing the shape of the power receiving coil provided on the substrate.

[0014] Figure 3 It is a diagram schematically showing the appearance of a first split housing and a second split housing constituting the housing.

[0015] Figure 4 It is a side cross-sectional view schematically showing the structure of a charging system of a capsule-shaped medication device.

[0016] Figure 5 (a) is a side cross-sectional view schematically showing a posture of a capsule-shaped medication device in one embodiment when being charged, Figure 5(b) is a side sectional view schematically showing the posture of the capsule-shaped medication device when being charged, in which the center of the cut surface coincides with the center of gravity when the capsule-shaped medication device is cut by a plane passing through the position where the center of gravity of the capsule-shaped medication device is located and is orthogonal to the long side direction of the capsule-shaped medication device. Figure 5 (c) is a side sectional view schematically showing the posture of a capsule-shaped medication device when charging, the center of gravity of which is located at a position different from the center of the above-mentioned cut surface but is located at a position not overlapping with the substrate when viewed in a direction perpendicular to the substrate.

[0017] Figure 6 This is a diagram for illustrating the angle θ between a line connecting the center of gravity of a capsule-shaped medication device and the center of a cut surface when the capsule-shaped medication device is cut using a plane passing through the position where the center of gravity of the capsule-shaped medication device is located and which is perpendicular to the long side direction of the capsule-shaped medication device, and a reference line passing through the center of the cut surface and extending in a direction perpendicular to the substrate.

[0018] Figure 7 This is a diagram showing the relationship between the angle θ between a line connecting the center of gravity of a capsule-shaped medication device and the center of a cut surface when the capsule-shaped medication device is cut by a plane passing through the center of gravity of the capsule-shaped medication device and perpendicular to the long side direction of the capsule-shaped medication device, and a reference line passing through the center of the cut surface and extending in a direction perpendicular to the substrate, and the output voltage of a rectifier bridge circuit arranged at the rear stage of the power receiving coil. DETAILED DESCRIPTION

[0019] The following describes the features of the present invention in detail by showing embodiments of the present invention.

[0020] The capsule medication device 10 in one embodiment is taken together with a medicine, and can transmit biological information to the outside of the body, for example. The medicine taken together with the capsule medication device 10 is any medicine.

[0021] Figure 1 (a) is a side view schematically showing a capsule-shaped medication device 10 in one embodiment. Figure 1 (b) schematically shows a cut along line 1B-1B. Figure 1 (a) is a cross-sectional view of the structure of the capsule-shaped medication device 10. Figure 1 (c) schematically shows the cutting along line 1C-1C. Figure 1 (a) is a cross-sectional view of the structure of the capsule-shaped medication device 10. Figure 1 In (a) to (c), the X-axis direction is the long-side direction of the capsule medication device 10, and the Y-axis direction is the short-side direction. In addition, the Z-axis is an axis orthogonal to the X-axis and the Y-axis.

[0022] A capsule-shaped medication device 10 according to one embodiment includes a capsule-shaped casing 1 , a substrate 2 , a power receiving coil 3 , and a secondary battery 4 .

[0023] The housing 1 is made of, for example, a biocompatible resin or a general-purpose resin coated with a biocompatible material on the surface. As the biocompatible resin, for example, epoxy resin can be used. As the material used for the housing 1, it is preferred to use a material that will not be dissolved by gastric acid or the like and discharged from the body after the capsule-shaped medication device 10 is ingested into the body.

[0024] The substrate 2 is arranged inside the housing 1. The substrate 2 arranged inside the housing 1 may be one or more. For example, the substrate 2 may include a substrate provided with a power receiving coil 3, a substrate provided with a secondary battery 4, or a substrate provided with a control IC.

[0025] The receiving coil 3 is used to perform wireless power supply in pair with the power transmission coil and is provided on the substrate 2. The receiving coil 3 is made of copper, for example. Wireless power supply can be performed using electromagnetic induction technology or magnetic field resonance technology. In addition, magnetic field resonance is a type of electromagnetic induction in which a current flows in the receiving coil 3 in response to changes in the magnetic field generated by the power transmission coil. Figure 2 2 is a top view schematically showing the shape of the power receiving coil 3 provided on the substrate 2. Figure 2 Although omitted in the figure, the power receiving coil 3 is connected to the secondary battery 4 .

[0026] The secondary battery 4 can be charged by the power received by the power receiving coil 3. The secondary battery 4 may be any battery as long as it is a battery that can be charged and discharged, for example, a fully solid battery having a solid electrolyte. The secondary battery 4 is provided, for example, on the substrate 2 on which the power receiving coil 3 is provided. However, the location where the secondary battery 4 is provided is not limited to the substrate 2 on which the power receiving coil 3 is provided.

[0027] The capsule medication device 10 may further include a biological information acquisition unit 5 and a signal transmission unit 6. The biological information acquisition unit 5 and the signal transmission unit 6 are supplied with power from the secondary battery 4. Figure 1 , the structure in which the biological information acquisition unit 5 and the signal transmission unit 6 are provided on the substrate 2 provided with the power receiving coil 3 is shown, but the positions where the biological information acquisition unit 5 and the signal transmission unit 6 are provided are not limited to the substrate 2.

[0028] The biological information acquisition unit 5 acquires biological information such as the position of the capsule-shaped medication device 10 taken together with the medicine in the body and the temperature in the body. For example, the biological information acquisition unit 5 has a timing unit capable of measuring time, measures the time that has passed since the capsule-shaped medication device 10 was taken into the body, and infers the position of the capsule-shaped medication device 10 in the body based on the measured time. As another example, the biological information acquisition unit 5 has a temperature sensor to detect the temperature in the body. In addition, the biological information includes all information related to the organism, and the biological information acquisition unit 5 can be configured to acquire arbitrary biological information.

[0029] The signal sending unit 6 sends 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 sending unit 6 sends the biological information acquired by the biological information acquisition unit 5 to the outside of the body. The signal sending unit 6 is, for example, a piezoelectric element, and sends the biological information as an ultrasonic signal. As materials for the piezoelectric element, PZT (lead zirconate titanate), BT (barium titanate), KNN (potassium sodium niobate), etc. can be used. In this case, the capsule-shaped medication device 10 has an IC for controlling the piezoelectric element. In the case where the signal sending unit 6 is a piezoelectric element, the biological information can be reliably sent to the outside of the body as an ultrasonic signal. The signal sent from the signal sending unit 6 is received by a signal receiving unit provided outside the body.

[0030] In addition, when the signal transmitting unit 6 is a piezoelectric element and transmits an ultrasonic signal, and when the vibration mode is set to the lateral displacement type (d31 mode), the longer the length of the piezoelectric element, the more the ultrasonic signal can be enhanced. The capsule medication device 10 in this embodiment has a capsule shape, so a longer piezoelectric element can be accommodated inside, and a stronger ultrasonic signal can be transmitted.

[0031] However, the signal transmission unit 6 is not limited to the piezoelectric element. For example, the signal transmission unit 6 may be configured to transmit biological information through wireless communication.

[0032] 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. In addition, 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.

[0033] Figure 1(c) shows a cut surface 13 when the capsule-shaped medication device 10 is cut by a plane passing through the position where the center of gravity 11 of the capsule-shaped medication device 10 is located and is orthogonal to the long side direction of the capsule-shaped medication device 10. In this embodiment, Figure 1 As shown in (c), the cut surface 13 is circular. In addition, the center of gravity 11 of the capsule-shaped medication device 10 can be obtained by a known method.

[0034] In the capsule-shaped medication device 10 of this embodiment, the center of gravity 11 of the capsule-shaped medication device 10 is as follows: Figure 1 As shown in (c), the capsule-shaped medication device 10 is located at a position different from the center 12 of the cut surface 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 is orthogonal to the long side direction of the capsule-shaped medication device 10, and as shown in Figure 1 As shown in (b), it is located at a position overlapping with the substrate 2 when viewed in a direction perpendicular to the substrate 2.

[0035] As an example, the housing 1 is constructed by combining a first split housing 1 a and a second split housing 1 b . Figure 3 1a and 1b before being combined. Figure 3 In FIG. 1 , as will be described later, the substrate 2 is indicated by a dotted line in order to indicate an example of the arrangement position of the substrate 2 .

[0036] The first split shell 1a and the second split shell 1b have shapes obtained by cutting the shell 1 using a plane that passes through the center of the short side direction of the shell 1 and is parallel to the long side direction. The first split shell 1a and the second split shell 1b can be manufactured by injection molding or a manufacturing method using a 3D printer, for example. The first split shell 1a and the second split shell 1b can be combined using an adhesive or the like.

[0037] In order to make the center of gravity 11 of the capsule-shaped medication device 10 different from the center 12 of the above-mentioned cut surface 13, for example, the weight of the first split shell 1a is different from the weight of the second split shell 1b. For example, by making the weight of the second split shell 1b heavier than the weight of the first split shell 1a, it is possible to adjust the center of gravity 11 of the capsule-shaped medication device 10 to be located on the second split shell 1b side. In this way, the shell 1 is composed of the first split shell 1a and the second split shell 1b, and the weight of the first split shell 1a is different from the weight of the second split shell 1b, so that the position of the center of gravity 11 of the capsule-shaped medication device 10 can be easily set to a desired position.

[0038] In order to make the weight of the first split shell 1a different from the weight of the second split shell 1b, for example, a counterweight may be provided on either the first split shell 1a or the second split shell 1b. In order to position the center of gravity 11 of the capsule-shaped medication device 10 at a position overlapping with the substrate 2 when viewed in a direction perpendicular to the substrate 2, it is preferred that at least a portion of the counterweight is provided at a position overlapping with the substrate 2 when viewed in a direction perpendicular to the substrate 2, and it is more preferred that the entire counterweight is provided at a position overlapping with the substrate 2.

[0039] like Figure 3 As shown, the substrate 2 may be disposed inside the second split housing 1b or inside the first split housing 1a. The substrate 2 may be disposed inside the second split housing 1b or the first split housing 1a by embedding, or by using screws, adhesives, or double-sided tape.

[0040] Instead of providing the weight on either the first split shell 1a or the second split shell 1b, the weight may be provided on the substrate 2, and the substrate 2 provided with the weight may be disposed in either the first split shell 1a or the second split shell 1b.

[0041] Figure 4 1 is a side cross-sectional view schematically showing the structure of a charging system 100 for a capsule medication device. The charging system 100 for a capsule medication device includes a capsule medication device 10 , a storage sheet 20 , and a charger 30 .

[0042] The storage sheet 20 has a plurality of storage sections 21 and a metal cover 22 covering the openings of the plurality of storage sections 21. The storage sheet 20 is, for example, a PTP sheet (Press Through Pack Sheet). The portion of the storage sheet 20 that constitutes the storage section 21 is, for example, made of resin, and the metal cover 22 is, for example, made of aluminum.

[0043] The capsule-shaped medication device 10 is stored in the storage portion 21 of the storage sheet 20 . Figure 4 2 shows a state where the capsule medication device 10 is stored in the opening of the storage unit 21 and the opening is covered with the metal cover 22. Figure 4 As shown, one capsule-shaped medication device 10 is stored in each storage section 21. However, a plurality of capsule-shaped medication devices 10 may be stored in one storage section 21.

[0044] In addition, the medicine to be taken at one time and the capsule-shaped medication device 10 may be stored in one storage section 21. When there are a plurality of medicines to be taken at one time, the plurality of medicines and one capsule-shaped medication device 10 may be stored in one storage section 21.

[0045] The secondary battery 4 of the capsule-shaped medication device 10 stored in the storage section 21 of the storage sheet 20 can be charged by the 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 power transmission coil 31 may be provided. When charging the secondary battery 4 of the capsule-shaped medication device 10, the storage sheet 20 storing the capsule-shaped medication device 10 in the storage section 21 is placed on the placement surface 30a of the charger 30. Figure 4 As shown, the contact portion between the storage sheet 20 and the charger 30 is located on the opposite side of the metal cover 22. When current flows through the power transmission coil 31 of the charger 30 in this state, current flows through the power reception coil 3 of the capsule medication device 10 by electromagnetic induction, and the secondary battery 4 is charged.

[0046] The power transmission coil 31 is preferably disposed on the placement surface 30a or a position close to the placement surface 30a on which the storage sheet 20 is placed in the charger 30. By disposing the power transmission coil 31 on the placement surface 30a or a position close to the placement surface 30a of the charger 30, the distance between the power transmission coil 31 and the power receiving coil 3 of the capsule-shaped medication device 10 becomes shorter, so that wireless charging can be performed with higher charging efficiency.

[0047] As described above, when the secondary battery 4 of the capsule-shaped medication device 10 is charged, the portion where the storage sheet 20 contacts the charger 30 is located on the opposite side to the metal cover 22. Figure 4 As shown, the storage sheet 20 is placed on the placement surface 30a of the charger 30 so that the portion of the storage sheet 20 opposite to the metal cover 22 faces the placement surface 30a of the charger 30. By charging in this state, the battery is not easily affected by electromagnetic waves from the side where the metal cover 22 is provided, that is, the side opposite to the charger 30 with respect to the storage sheet 20, so that charging can be performed efficiently.

[0048] In the capsule medication device charging system 100 of the present invention, the capsule medication device 10 stored in the storage portion 21 of the storage sheet 20 can be charged by the patient taking the medicine himself or by a pharmacy that delivers the capsule medication device 10 together with the medicine to the patient.

[0049] As described above, in the capsule-shaped medication device 10 of the present embodiment, the center of gravity 11 is located at a position different from the center 12 of the cut surface 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 is perpendicular to the long side direction, and is located at a position overlapping with the substrate 2 when viewed in a direction perpendicular to the substrate 2. With such a structure, when the capsule-shaped medication device 10 is placed on the placement surface 30a of the charger 30, wireless power can be efficiently supplied, and the secondary battery 4 can be efficiently charged. While referring to Figure 5 , while explaining the situation.

[0050] Figure 5 (a) is a side cross-sectional view schematically showing the posture of the capsule medication device 10 in this embodiment when charging. Figure 5 (b) is a side cross-sectional view schematically showing the posture of the capsule-shaped medication device 10X when charging, in which the center of gravity 11X coincides with the center 12X of the above-mentioned cut surface 13X. Figure 5 (c) is a side sectional view schematically showing the posture of the capsule-shaped medication device 10Y when charging, wherein the center of gravity 11Y is located at a position different from the center 12Y of the above-mentioned cut surface 13Y, but is located at a position not overlapping with the substrate 2Y when viewed in a direction perpendicular to the substrate 2Y. Figure 5 In (a) to (c), the charger 30 is omitted, but Figure 4 Similarly, the state where the capsule-shaped medication device 10, 10X, 10Y is placed on the placement surface 30a of the charger 30 is shown. Figure 5 In (a) to (c), the charger 30 is located vertically below the capsule-shaped medication device 10, 10X, 10Y.

[0051] Figure 5 The capsule medication device 10X shown in (b) and Figure 5 The capsule medication device 10Y shown in (c) is not the capsule medication device of the present invention. Here, for the components of the capsule medication device 10X that correspond to the capsule medication device 10, the same reference numerals are added with X for description. In addition, for the components of the capsule medication device 10Y that correspond to the capsule medication device 10, the same reference numerals are added with Y for description.

[0052] like Figure 5 As shown in (b), when the center of gravity 11X of the capsule-shaped medication device 10X coincides with the center 12X of the above-mentioned cut surface 13X, when the capsule-shaped medication device 10X is placed on the loading surface 30a of the charger 30, the capsule-shaped medication device 10X can rotate around a center line passing through the center of gravity 11X and parallel to the long side direction. Therefore, the capsule-shaped medication device 10X is in a state of being easily rotated and moved within the storage portion 21 of the storage sheet 20, and the relative positional relationship between the power transmission coil 31 of the charger 30 and the power receiving coil 3X of the capsule-shaped medication device 10X is not uniquely determined. Therefore, as Figure 5As shown in (b), the substrate 2X of the capsule-shaped medication device 10X is sometimes in a positional relationship orthogonal to the mounting surface 30a of the charger 30. In this case, the power receiving coil 3X provided on the substrate 2X and the power transmitting coil 31 of the charger 30 are in a mutually orthogonal positional relationship, so the power supply efficiency of the wireless power supply is reduced, and therefore, the charging efficiency of the secondary battery 4X is reduced. In addition, as described above, since the capsule-shaped medication device 10X is in a state that is easy to rotate and move in the storage portion 21 of the storage sheet 20, when charging the secondary batteries 4X of multiple capsule-shaped medication devices 10X, charging deviation occurs depending on the posture.

[0053] In addition, if Figure 5 As shown in (c), when the center of gravity 11Y of the capsule medication device 10Y is located at a position different from the center 12Y of the above-mentioned cut surface 13Y, but is located at a position not overlapping with the substrate 2Y when viewed in a direction perpendicular to the substrate 2Y, the angle between the placement surface 30a of the charger 30 and the substrate 2Y becomes larger, so the amount of magnetic flux passing through the power receiving coil 3Y in the magnetic flux generated by the current flowing through the power transmission coil 31 becomes smaller. Therefore, the power supply efficiency of the wireless power supply becomes lower, and the charging efficiency of the secondary battery 4X becomes lower.

[0054] In contrast, in the capsule-shaped medication device 10 of the present embodiment, in which the center of gravity 11 is located at a position different from the center 12 of the above-mentioned cut surface 13 and is located at a position overlapping with the substrate 2 when viewed in a direction perpendicular to 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, the center of gravity 11 is located vertically below the center 12 of the above-mentioned cut surface 13, so the angle between the placement surface 30a of the charger 30 and the substrate 2 does not change. Therefore, it is possible to suppress charging deviation when wirelessly charging the secondary batteries 4 of the plurality of capsule-shaped medication devices 10 respectively stored in the plurality of storage sections 21 of the storage sheet 20.

[0055] In addition, the capsule medication device 10 in this embodiment will not become Figure 5 Since the positional relationship shown in (b) is achieved, that is, the positional relationship in which the power receiving coil 3 and the power transmitting coil 31 are orthogonal to each other, wireless power supply can be efficiently performed, and the secondary battery 4 can be charged efficiently.

[0056] In addition, it is preferred that the center of gravity 11 of the capsule-shaped medication device 10 is as Figure 5As shown in (a), the center of gravity 11 of the capsule-shaped medication device 10 is located on 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. When the center of gravity 11 of the capsule-shaped medication device 10 is located on 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, when the capsule-shaped medication device 10 is placed on the placement surface 30a of the charger 30, the placement surface 30a of the charger 30 is located in a position parallel to the substrate 2 of the capsule-shaped medication device 10, more specifically, the main surface of the substrate 2 on which the power receiving coil 3 is provided. Therefore, the power receiving coil 3 and the power transmitting coil 31 are in a positional relationship parallel to each other, so that wireless power supply can be performed with the highest power supply efficiency, and the secondary battery 4 can be charged most efficiently.

[0057] Here, the angle θ between the line 15 connecting the center of gravity 11 of the capsule medication device 10 and the center 12 of the cut surface 13 and the reference line 14 passing through the center 12 of the cut surface 13 and extending in a direction perpendicular to the substrate 2 is changed by changing the position of the center of gravity 11 (see Figure 6 ), and the voltage when wireless power is supplied by the charger 30 was investigated. Figure 7 The results of the survey are shown in . Figure 7 The horizontal axis represents the angle θ, and the vertical axis represents the output voltage of the rectifier bridge circuit provided at the rear stage of the power receiving coil 3. If the output voltage of the rectifier bridge circuit is high, a boost circuit for fully charging the secondary battery 4 is not required, and the number of components can be reduced. The charging of the secondary battery 4 from the rectifier bridge circuit is preferably performed in a state where a linear regulator (LDO) or a charge monitoring IC for stably charging the secondary battery 4 is provided. In addition, when a linear regulator is provided, the effect brought by the high output voltage of the rectifier bridge circuit is also achieved.

[0058] like Figure 7 As shown, when the angle θ between the line 15 connecting the center of gravity 11 of the capsule-shaped medication device 10 and the center 12 of the cut surface 13 and the reference line 14 is 0°, that is, Figure 5 When the center of gravity 11 of the capsule medication 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, Figure 5 As shown in (b), when the substrate 2 and the placement surface 30a of the charger 30 are in a positional relationship of being orthogonal to each other, the output voltage of the rectifier bridge circuit is the lowest.

[0059] In addition, if Figure 7As shown, the output voltage of the rectifier bridge circuit when the angle θ is 0° is used as a reference, and the output voltage of the rectifier bridge circuit when the angle θ is 75° or less is 60% or more. Therefore, the angle θ between the line 15 connecting the center of gravity 11 of the capsule-shaped medication device 10 and the center 12 of the 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.

[0060] In addition, if Figure 7 As shown, the output voltage of the rectifier bridge circuit when the angle θ is 0° is used as a reference, and the output voltage of the rectifier bridge circuit when the angle θ is 45° or less is 80% or more. Therefore, the angle θ between the line 15 connecting the center of gravity 11 of the capsule-shaped medication device 10 and the center 12 of the cut surface 13 and the reference line 14 passing through the center 12 of the cut surface 13 and extending in a direction perpendicular to the substrate 2 is preferably 45° or less.

[0061] In addition, even when the angle θ is large, the output voltage of the rectifier bridge circuit can be increased by increasing the voltage applied to the power transmission coil 31 of the charger 30. However, if the voltage applied to the power transmission coil 31 is increased, the electromagnetic field strength increases, which may affect other electronic components. Therefore, in order to increase the output voltage of the rectifier bridge circuit without increasing the voltage applied to the power transmission coil 31, the angle θ is preferably 75° or less, and more preferably 45° or less.

[0062] The present invention is not limited to the above-described embodiment, and various applications and modifications can be made within the scope of the present invention.

[0063] The capsule-shaped medication device and the charging system of the capsule-shaped medication device in the present application are described as follows.

[0064] <1> A capsule medication device, characterized by comprising:

[0065] Capsule-shaped shell;

[0066] A substrate is disposed inside the shell;

[0067] A power receiving coil is disposed on the substrate; and

[0068] The secondary battery can be charged by the power received by the power receiving coil.

[0069] The center of gravity of the capsule-shaped medication device is located at a position different from the center of the cut surface when the capsule-shaped medication device is cut by a plane passing through the position of the center of gravity and perpendicular to the long side direction of the capsule-shaped medication device, and is located at a position overlapping with the substrate when viewed along a direction perpendicular to the substrate.

[0070] <2>. The capsule medication device according to <1>, characterized in that:

[0071] An angle between a line connecting the center of gravity of the capsule-shaped medication device and the center of the cut surface and a reference line passing through the center of the cut surface and extending in a direction perpendicular to the substrate is 75° or less.

[0072] <3>. The capsule medication device according to <2>, characterized in that:

[0073] The angle between the reference line and a line connecting the center of gravity of the capsule medication device and the center of the cut surface is 45 degrees or less.

[0074] <4>. A capsule medication device according to any one of <1> to <3>, characterized in that:

[0075] The center of gravity of the capsule-shaped medication device is located on a reference line that passes through the center of the cut surface and extends in a direction perpendicular to the substrate.

[0076] <5>. The capsule medication device according to any one of <1> to <4>, characterized in that it also comprises:

[0077] a biological information acquisition unit that acquires biological information; and

[0078] The signal sending unit sends the biological information acquired by the biological information acquiring unit.

[0079] <6>. The capsule medication device according to <5>, characterized in that:

[0080] The signal transmitting unit is a piezoelectric element.

[0081] <7>. A capsule medication device according to any one of <1> to <6>, characterized in that:

[0082] The housing is formed by combining a first split housing and a second split housing.

[0083] The weight of the first split housing is different from the weight of the second split housing.

[0084] <8> A charging system for a capsule medication device, characterized by comprising:

[0085] A storage sheet having a plurality of storage portions and a metal cover covering the openings of the plurality of storage portions;

[0086] The capsule medication device according to any one of <1> to <7>, which is stored in the storage portion of the storage sheet; and

[0087] The charger has a power transmission coil and is provided with the storage sheet on which the capsule-shaped medication device is stored in the storage section.

[0088] <9>. The charging system of the capsule medication device according to <8>, characterized in that:

[0089] The portion where the housing sheet contacts the charger when the secondary battery is charged is located on the opposite side to the metal cover.

[0090] Explanation of the reference numerals: 1…shell; 1a…first split shell; 1b…second split shell; 2…substrate; 3…power receiving coil; 4…secondary battery; 5…biological information acquisition unit; 6…signal sending unit; 10…capsule-shaped medication device; 11…center of gravity of the capsule-shaped medication device; 12…center of the cut surface when the capsule-shaped medication device is cut by a plane passing through the position of the center of gravity and perpendicular to the long side direction; 13…cut surface when the capsule-shaped medication device is cut by a plane passing through the position of the center of gravity and perpendicular to the long side direction; 14…baseline; 20…storage sheet; 21…storage unit; 22…metal cover; 30…charger; 31…power transmitting coil; 100…charging system of the capsule-shaped medication device.

Claims

1. A capsule medication device, characterized in that: have: Capsule-shaped shell; A substrate, disposed inside the housing; A power receiving coil is disposed on the substrate; and The secondary battery can be charged by the power received by the power receiving coil. The center of gravity of the capsule-shaped medication device is located at a position different from the center of a cut surface when the capsule-shaped medication device is cut by a plane passing through the position of the center of gravity and perpendicular to the long side direction of the capsule-shaped medication device, and is located at a position overlapping with the substrate when viewed in a direction perpendicular to the substrate.

2. The capsule-shaped medication device according to claim 1, characterized in that: An angle between a line connecting the center of gravity of the capsule-shaped medication device and the center of the cut surface and a reference line passing through the center of the cut surface and extending in a direction perpendicular to the substrate is 75° or less.

3. The capsule-shaped medication device according to claim 2, characterized in that: An angle between a line connecting the center of gravity of the capsule-shaped medication device and the center of the cut surface and the reference line is 45 degrees or less.

4. The capsule-shaped medication device according to any one of claims 1 to 3, characterized in that: The center of gravity of the capsule-shaped medication device is located on a reference line that passes through the center of the cut surface and extends in a direction orthogonal to the substrate.

5. The capsule-shaped medication device according to any one of claims 1 to 4, characterized in that: Also available: a biological information acquisition unit that acquires biological information; and The signal transmitting unit transmits the biological information acquired by the biological information acquiring unit.

6. The capsule-shaped medication device according to claim 5, characterized in that: The signal transmitting unit is a piezoelectric element.

7. The capsule-shaped medication device according to any one of claims 1 to 6, characterized in that: The housing is formed by combining a first split housing and a second split housing. The weight of the first split shell is different from the weight of the second split shell.

8. A charging system for a capsule-shaped medication device, characterized in that: have: A storage sheet having a plurality of storage portions and a metal cover covering the openings of the plurality of storage portions; The capsule medication device according to any one of claims 1 to 7, which is stored in the storage portion of the storage sheet; and The charger has a power transmission coil and is placed on the storage sheet in which the capsule-shaped medication device is stored in the storage section.

9. The charging system of the capsule-shaped medication device according to claim 8, characterized in that: The portion where the housing sheet contacts the charger when the secondary battery is charged is located on the opposite side to the metal cover.

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