JP2004064961A - Charging system, mobile apparatus, and charging device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To miniaturize a mobile apparatus incorporating a secondary battery. <P>SOLUTION: A device 1 consists of a mobile apparatus 3 and a master apparatus 5 having the function of charging a secondary battery 7 incorporated in the mobile apparatus 3. In this device 1, the mobile apparatus 3 is provided with external terminals 9a, 9b and a reed switch 15 that connects the secondary battery 7 to the external terminal 9a when actuated by magnetic force, whereas the master apparatus 5 is provided with a socket portion 17 that forms a storing space 17a for the mobile apparatus 3, a magnet 19 positioned close to the storing space 17a, and a charging circuit 23 that supplies charging electric power via charging terminals 21a, 21b that make contact with the external terminals 9a, 9b respectively on the mobile apparatus 3 when inserted into the storing space 17a. When the mobile apparatus 3 is inserted into the storing space 17a, the magnet 19 actuates the reed switch 15 and connects the secondary battery 7 to the external terminal 9a. With the external terminals 9a, 9b and the charging terminals 21a, 21b contacting each another, the charging electric power is supplied from the charging circuit 23 to the secondary battery 7. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a portable device having a built-in secondary battery.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a portable device having a built-in secondary battery generally charges the secondary battery by directly setting the portable device in a charging device. In such a portable device, when the secondary battery is set in the charging device, the secondary battery is connected to a path to which the charging power is supplied from the charging device. In the type in which the plug of the device is inserted into the jack of the portable device, a mechanical mechanism in the jack is operated by using the insertion force of the plug to switch the connection destination of the secondary battery.
[0003]
[Problems to be solved by the invention]
However, since such a mechanical mechanism is relatively large, there is a problem in that the miniaturization of the portable device is hindered. Further, there is a portable device of a type in which switching is performed electrically by an internal switching circuit without using such a mechanical mechanism. In this case, the switching circuit includes whether or not the portable device is set in the charging device. , Standby power for electrically detecting the power is required, and power consumption increases. Therefore, a secondary battery having a large capacity is required, and as a result, miniaturization of the portable device is hindered.
[0004]
The present invention has been made in view of such a problem, and has as its object to reduce the size of a portable device having a built-in secondary battery.
[0005]
Means for Solving the Problems and Effects of the Invention
The charging system according to claim 1, which has been made to achieve the above object, includes a portable device that incorporates a secondary battery and operates by the power of the secondary battery, and a secondary battery that is built in the portable device. And a charging device for charging. In the charging system, the charging device includes a holding unit that holds the portable device, and a magnet that is located near the portable device and that is held by the holding device. On the other hand, the portable device is operated by the magnetic force of the magnet provided in the charging device in a state where the portable device is held by the holding means of the charging device, and the secondary battery is supplied with charging power from the charging device. A reed switch connected to a charging path in the portable device is provided.
[0006]
In other words, in the charging system according to the first aspect, when the portable device is held by the holding means of the charging device, the reed switch of the portable device is actuated by the magnetic force of the magnet provided in the charging device, and the secondary battery is charged. And the charging power from the charging device is supplied to the secondary battery.
[0007]
According to the charging system of the first aspect, the configuration for connecting the secondary battery to the charging path can be reduced in size as compared with a conventional mechanical mechanism, and the connection / connection of the secondary battery to the charging path can be reduced. Since power for a circuit for switching disconnection is not required, a secondary battery having a small capacity can be used, and as a result, the size of the portable device can be reduced.
[0008]
In particular, as in the charging system according to claim 2, the reed switch of the portable device connects the secondary battery to a charging path in the portable device and disconnects the secondary battery from an internal circuit that operates the portable device. If the portable device is held by the holding means, the power of the portable device is automatically turned off, and when the portable device is removed from the holding device, the power of the portable device is automatically turned on. Since the user does not need to perform the on / off operation, it is convenient.
[0009]
Further, as in the charging system according to the third aspect, if the charging device performs trickle charging after the secondary battery to which the power for charging is supplied reaches a predetermined charge amount, the mobile phone may be portable. Even if the battery is left for a long time while being held by the holding means of the charging device, it is possible to prevent the secondary battery from being damaged by overcharging, and to maintain a fully charged state.
[0010]
Next, in the charging system according to the fourth aspect, the holding means of the charging device has a wall that covers the periphery of the portable device, and a cutout portion is formed in the wall. According to this configuration, it is possible to easily remove the portable device by, for example, putting a finger through the notch while sufficiently covering the periphery of the portable device with the wall.
[0011]
Next, in the charging system according to claim 5, the holding means of the charging device has a storage space for storing and holding the portable device, and the portable device has a semicircular shape on the insertion side into the storage space. Has become. According to this configuration, the portable device can be easily inserted into the storage space.
[0012]
Also, in the charging system according to the sixth aspect, similarly to the charging system according to the fifth aspect, the holding means of the charging device has a storage space. In particular, in this charging system, the portable device and the storage space are not provided. The portable device is fitted only when the portable device is inserted into the storage space in a predetermined direction. According to this configuration, it is possible to prevent the portable device from being inserted into the storage space in an incorrect direction.
[0013]
Next, in the charging system according to claim 7, the reed switch and the magnet are provided at a position where the reed switch operates only when the portable device is held in a predetermined direction by the holding means of the charging device. . According to this configuration, even if the portable device is held in the wrong direction and the positive terminal and the negative terminal of the charging terminal and the external terminal come into reverse contact, the reed switch does not operate, and the charging power is supplied to the secondary battery. Since it is not supplied, breakage of the secondary battery and the like can be prevented.
[0014]
Next, in the charging system according to claim 8, an external terminal of the portable device is connected to a charging terminal of the charging device in a charging path in the portable device while the portable device is held by holding means of the charging device. , The charging power is supplied from the charging terminal of the charging device. Further, the portable device has a concave portion, and an external terminal is disposed at the back of the concave portion. The charging terminal of the charging device has a spring property to enter the concave portion of the portable device and contact the external terminal. are doing. According to this configuration, when the portable device is held by the holding means, the charging terminal of the charging device enters the concave portion of the portable device, and it is possible to give the user a feeling of being correctly inserted (click feeling).
[0015]
Also, in the charging system according to the ninth aspect, similarly to the charging system according to the eighth aspect, when the external terminal contacts the charging terminal, charging power is supplied to the charging path. In particular, in the charging system, the charging terminal and the external terminal are provided at positions where they come into contact with each other only when the portable device is held in the holding unit in a predetermined direction. According to this configuration, even if the portable device is held in the wrong direction, the charging terminal and the external terminal do not come into contact with each other. Damage can be prevented.
[0016]
Next, in the charging system according to the tenth aspect, the portable device according to the first to ninth aspects is mounted on a body (for example, an arm or the like) of the subject and biological information (for example, a pulse or the like) of the subject. Is detected. Such a portable device is particularly effective because it is required to reduce the size of the portable device as much as possible.
[0017]
In particular, in the case where the charging device is provided with processing means for processing biological information detected by the portable device (for example, analyzing or displaying biological information), as in the charging system according to claim 11, The means for supplying the charging power may be configured to operate on a power supply different from the power supply of the processing means. In other words, in a configuration in which the means for supplying the charging power operates on the same power supply as the power supply of the processing means, the power is always supplied to the processing means even if the processing means does not need to be operated while the portable device is being charged. Therefore, wasteful power is consumed. On the other hand, according to the charging system of the eleventh aspect, the portable device can be charged while the power of the processing unit is turned off in the charging device, so that the power consumption can be reduced.
[0018]
Further, when the portable device has a detection unit for detecting biological information on the outer surface, as in the charging system according to claim 12, the holding unit detects the portable device and detects the portable device. It is good to hold so that a part may be covered. According to this configuration, the detection unit of the portable device is protected while the portable device is held by the holding unit of the charging device, so that the detection unit can be prevented from being damaged or damaged.
[0019]
Next, a portable device according to a thirteenth aspect has a built-in secondary battery, and operates by the power of the secondary battery. In this portable device, the reed switch operates by receiving a magnetic force from the outside, and connects the secondary battery to a charging path in the portable device to which charging power is supplied from the outside. According to this portable device, it is possible to construct a charging system that achieves the same effect as the system of the first aspect.
[0020]
Next, a charging device according to a fourteenth aspect charges a secondary battery of the portable device according to the thirteenth aspect, and includes a holding unit that holds the portable device, and a portable device that is held by the holding unit. And a magnet for actuating the reed switch of the present invention. Further, in the present apparatus, the charging means supplies charging power to a charging path in the mobile device while the mobile device is held by the holding device. According to this charging device, it is possible to construct a charging system that can obtain the same effect as the system of the first aspect.
[0021]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments to which the present invention is applied will be described with reference to the drawings.
First, FIG. 1 is a schematic configuration diagram of a biological information detecting device 1 in which the charging system of the embodiment is incorporated.
[0022]
As shown in FIG. 1, the biological information detection device 1 of the present embodiment is attached to a subject's body (for example, an arm or the like) and optically detects a state of blood flow or the like from above the skin as biological information. A portable device 3 that wirelessly transmits biological information data representing a detection result, receives radio waves from the portable device 3, collects, analyzes, and displays biological information such as a subject's pulse rate and respiratory rate. And a parent device 5 which also operates as a charging device for charging the battery 3.
[0023]
The portable device 3 includes a secondary battery (in this embodiment, a lithium ion secondary battery) 7 as a power supply for operation, external terminals 9 a and 9 b provided on both side surfaces of the portable device 3, The portable terminal 3 includes a charging path 11 that connects the positive terminal of the battery 7 to the external terminal 9 a and a reed switch 15 that switches the connection to the internal circuit 13 of the portable device 3. The reed switch 15 connects the rechargeable battery 7 to the internal circuit 13 when not receiving a magnetic force from the outside, and connects the rechargeable battery 7 when receiving a magnetic force necessary for the reed switch 15 to operate. Connect to charging path 11.
[0024]
On the other hand, the parent device 5 is provided with a socket portion 17 forming a storage space 17a for storing and holding the portable device 3, and a reed switch 15 of the portable device 3 provided near the storage space 17a and stored in the storage space 17a. , A charging terminal 21a, 21b provided facing the storage space 17a and in contact with the external terminals 9a, 9b of the portable device 3 inserted into the storage space 17a, and the charging terminals 21a, 21b. And a charging circuit 23 for supplying charging power to the portable device 3. Note that the socket portion 17 corresponds to a holding unit.
[0025]
Next, FIG. 2 is an explanatory diagram (cross-sectional view) for describing the shape of the biological information detecting device 1. 2, (a) is a top view, (b) is a front view, and (c) is a side view.
As shown in FIG. 2, the portable device 3 has a substantially rectangular parallelepiped plate shape.
[0026]
Then, as shown in FIG. 2B, the portable device 3 has a semicircular shape on the insertion side (the lower surface in FIG. 2B) into the storage space 17a formed by the socket portion 17. And can be inserted smoothly.
As shown in FIG. 2A, the cross section of the portable device 3 perpendicular to the insertion direction into the storage space 17a has an R-shaped corner, and the front of the portable device 3 (FIG. ), The corners on both sides of the lower surface) and the corners on both sides of the back surface (the upper surface in FIG. 2A) have different R-shaped radii. On the other hand, the socket 17 of the parent device 5 has a shape that covers the outer surface of the portable device 3 with a substantially constant gap. For this reason, for example, even if the portable device 3 is to be inserted backward (the front and the back are reversed), the shape of the portable device 3 and the shape of the storage space 17 a formed by the socket portion 17 are fitted. Not inserted in the wrong direction.
[0027]
Further, as shown in FIG. 2A, when the portable device 3 is inserted into the storage space 17a, the external terminals 9a and 9b of the portable device 3 and the charging terminals 21a and 21b of the master device 5 are connected to the portable device 3, respectively. The containers 3 come into contact with each other at a position offset toward the rear side in the thickness direction. Therefore, even if the portable device 3 is inserted backward, the external terminals 9a and 9b and the charging terminals 21a and 21b are different in the thickness direction and do not contact each other. Is prevented.
[0028]
In addition, as shown in FIGS. 2A and 2B, when the portable device 3 is inserted into the storage space 17a, the reed switch 15 of the portable device 3 and the magnet 19 of the parent device 5 3 are close to each other at a position offset to the left from the center. Therefore, even if the portable device 3 is inserted face down and the external terminals 9a, 9b and the charging terminals 21b, 21a are in contact with each other, the magnet 19 and the reed switch 15 do not come close to each other and the reed switch Since the battery 15 does not operate, the charging power from the charging circuit 23 is not supplied to the secondary battery 7. As described above, in the biological information detecting device 1, the charging power is not supplied to the secondary battery 7 in the opposite polarity, thereby preventing the secondary battery 7 from being damaged.
[0029]
On the other hand, as shown in the perspective views of FIGS. 2A and 3, among the walls that cover the periphery of the portable device 3 in the socket portion 17, the wall that covers the front surface of the portable device 3 has the portable device 3. A notch 17b, which is one size smaller than the outer shape, is formed, and the portable device 3 can be easily taken out by inserting a finger into the notch 17b.
[0030]
Further, as shown in FIG. 2B, the external terminals 9a and 9b of the portable device 3 are provided at the back of the concave portions 3a and 3b formed on both side surfaces of the portable device 3, respectively. On the other hand, the charging terminals 21a and 21b of the parent device 5 have spring properties such that portions bent into an R shape enter the recesses 3a and 3b, respectively, and come into contact with the external terminals 9a and 9b. Therefore, when the portable device 3 is inserted into the storage space 17a, the charging terminals 21a, 21b of the parent device 5 enter the recesses 3a, 3b and come into contact with the external terminals 9a, 9b of the portable device 3 to have an appropriate feeling of use ( Click feeling) is obtained, and the user can feel that the portable device 3 has been correctly inserted into the storage space 17a.
[0031]
Further, as shown in FIG. 2, the portable device 3 is provided with a detection lens 25 (corresponding to a detection unit) on the back surface thereof. That is, the portable device 3 irradiates the subject's skin (specifically, blood vessels) with light by a light-emitting element (light-emitting diode) (not shown), and receives reflected light (not shown) that varies depending on the blood flow (specifically, the amount of hemoglobin). The detection lens 25 determines the pulse and the like of the subject by detecting the light from the light emitting element in the portable device 3 and the reflected light reflected from the skin. It is provided for passing. Here, for example, if the portable device 3 is placed casually on a desk or the like, it is conceivable that the detection lens 25 may be damaged and detection accuracy may be reduced. Since the socket 17 wraps around 80% of the portable device 3 and protects the detection lens 25, the detection lens 25 is prevented from being damaged or damaged.
[0032]
Next, the configuration of the circuits provided in each of master device 5 and portable device 3 will be described.
As shown in FIG. 4, the charging circuit 23 of the parent device 5 has a power supply terminal Vc connected to a constant power supply voltage Vcc (5 V in this embodiment), and a ground terminal GND connected to ground (ground potential = 0 V). A general-purpose IC 27 for charge control, a PNP transistor (hereinafter simply referred to as a transistor) 29 having a base connected to the output terminal EXT of the IC 27 and an emitter connected to the power supply voltage Vcc, and an anode connected to the collector of the transistor 29 A diode 31 having a cathode connected to one charging terminal 21a for preventing current sneakage, a current detection resistor 33 connected between the other charging terminal 21b and ground, and a constant voltage Vd and ground. And the two resistors 35 and 37 connected in series with each other, and the voltage on the upstream side of the current detection resistor 33 (that is, the voltage of the charging terminal 21b) is opposite A comparator 39 whose input is input to the input terminal (-) and a voltage at a connection point between the resistors 35 and 37 is input to the non-inverting input terminal (+); a light emitting diode 41 whose anode is connected to the power supply voltage Vcc; One end is connected to the cathode of the diode 41, and the other end is connected to the output terminal of the comparator 39. The voltage at the connection point between the resistors 35 and 37 is equal to the voltage on the upstream side of the current detection resistor 33 when 10% of the initial charging current flowing through the secondary battery 7 flows through the current detection resistor 33. The size is set.
[0033]
Then, the IC 27 monitors the voltage on the downstream side of the diode 31 (that is, the voltage of the charging terminal 21a) at the input terminal CEL, and monitors the voltage on the upstream side of the current detection resistor 33 at the input terminal CS. .
In addition to the charging circuit 23, the parent device 5 has a processing circuit (not shown) that performs processing such as reception of radio waves from the portable device 3 and analysis and display of biological information as an original operation. The processing circuit is operated by a power supply different from the power supply of the charging circuit 23 (that is, the power supply that is the source of the power supply voltage Vcc and the constant voltage Vd). Therefore, master device 5 can charge portable device 3 even when the power (main power source) of the processing circuit is turned off.
[0034]
On the other hand, in the portable device 3, the potential of the negative terminal of the secondary battery 7 is the ground in the portable device 3, and the negative terminal of the secondary battery 7 is always connected to the external terminal 9b. The positive terminal of the secondary battery 7 is connected to one of the charging path 11 connected to the external terminal 9a and the regulator IC 45 by the reed switch 15.
[0035]
When the positive terminal of the secondary battery 7 is connected by the reed switch 15, the regulator IC 45 generates a constant power supply voltage from the voltage of the secondary battery 7 and outputs the same to a subsequent circuit. That is, the portable device 3 is provided with a circuit (not shown) that operates by the power supplied from the regulator IC 45 and performs detection of biological information, wireless transmission of biological information data, and the like. The internal circuit 13 shown in FIG. 1 is configured.
[0036]
With such a circuit configuration, when the portable device 3 is inserted into the storage space 17a of the master device 5, the reed switch 15 operates by receiving the magnetic force of the magnet 19 on the master device 5 side, and the reed switch 15 The terminal is connected to the charging path 11 connected to the external terminal 9a. Further, in this case, the charging terminals 21a and 21b of the parent device 5 and the external terminals 9a and 9b of the portable device 3 come into contact with each other. Therefore, a circuit in which the transistor 29, the diode 31, the reed switch 15, the secondary battery 7, and the current detection resistor 33 are connected in series between the power supply voltage Vcc and the ground in the parent device 5 is formed. The power supply of the portable device 3 is turned off by the operation of the reed switch 15 when the portable device is inserted into the storage space 17a. This is because the secondary battery 7 is disconnected from the regulator IC 45.
[0037]
Then, first, the IC 27 controls the base current of the transistor 29 so that the voltage monitored at the input terminal CS becomes constant (that is, the charging current flowing from the transistor 29 to the secondary battery 7 becomes constant). I do. As a result, the secondary battery 7 is charged with a constant current, and the voltage of the secondary battery 7 (specifically, the voltage of the positive terminal) gradually increases. When the charging of the secondary battery 7 is started in this way, the input voltage of the inverting input terminal (−) of the comparator 39 becomes higher than the input voltage of the non-inverting input terminal (+), and the output of the comparator 39 becomes It goes low, and the light emitting diode 41 lights up.
[0038]
Thereafter, when the voltage monitored at the input terminal CEL rises to the characteristic value of the secondary battery 7 (4.2 V in this embodiment), the IC 27 switches to the control for keeping the voltage constant. That is, when the charging of the secondary battery 7 approaches the completion, the charging with the constant current is automatically terminated (auto cut), and the charging with the constant voltage is started. As a result, the charging current to the secondary battery 7 gradually decreases, and finally, charging for supplying a small amount of charging current sufficient to supplement the spontaneous discharge of the secondary battery 7, that is, trickle charging is performed. It becomes.
[0039]
When the charging current to the secondary battery 7 is smaller than 10% of the initial charging current, the input voltage of the inverting input terminal (−) of the comparator 39 becomes lower than the input voltage of the non-inverting input terminal (+). Then, the output terminal of the comparator 39 enters a high impedance state, and the light emitting diode 41 turns off. Therefore, the light emitting diode 41 is turned on when the portable device 3 is inserted into the storage space 17a, and is turned off when the charging of the secondary battery 7 is completed or when the portable device 3 is removed from the storage space 17a. As a result, the user can be notified of the state of charge of the secondary battery 7. The light emitting diode 41 is provided at the position shown in FIG.
[0040]
When the portable device 3 is taken out of the storage space 17a, the plus terminal of the secondary battery 7 is connected to the regulator IC 45 by the reed switch 15, and the power of the portable device 3 is turned on.
As described above, according to the biological information detection device 1 of the present embodiment, since the portable device 3 uses the reed switch 15 for switching the connection destination of the secondary battery 7, a mechanical mechanism is used. It is possible to reduce the size of the configuration as compared with the above, and it is not necessary to use a complicated circuit for detecting that the portable device 3 is set in the master device 5, so that standby power and the like are not required. it can. As a result, the size of the portable device 3 can be reduced, and the feeling of wearing on the body of the subject can be improved.
[0041]
In addition, in the present biological information detecting device 1, simply by inserting the portable device 3 into the storage space 17a formed in the master device 5, the power of the portable device 3 is automatically turned off and the charging of the secondary battery 7 is started. There is no need to perform a complicated operation such as turning on / off the power supply such that the power supply is automatically turned on just by removing the portable device 3 from the storage space 17a. Therefore, forgetting to turn off the power of the portable device 3 can be prevented.
[0042]
On the other hand, in the parent device 5, when the charging of the secondary battery 7 of the portable device 3 approaches to completion, the charging is switched from the constant current charging to the constant voltage charging. Even if the secondary battery 7 is left for a long time while being inserted into the battery 17a, the secondary battery 7 is not damaged by overcharging, and the portable device 3 can always be used in a fully charged state. Further, since the storage space 17a formed in the parent device 5 can be used as a storage place for the portable device 3, the portable device 3 can be prevented from being lost.
[0043]
Further, in the parent device 5, since the portable device 3 can be charged while the power of the processing circuit for analyzing and displaying biological information is turned off, the processing circuit and the charging circuit 23 are the same. Power consumption can be reduced as compared with a configuration in which a power supply operates.
As mentioned above, although one Embodiment of this invention was described, it cannot be overemphasized that this invention can take various forms. For example, the charging system of the present invention can be similarly applied to devices other than the biological information detecting device 1 described above.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram of a biological information detection device according to an embodiment.
FIG. 2 is an explanatory diagram for explaining a shape of a biological information detecting device.
FIG. 3 is a perspective view of the portable device inserted into a storage space of the parent device.
FIG. 4 is a circuit diagram of a circuit provided in the parent device and the portable device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Biological information detection device, 3 ... Portable device, 3a, 3b ... Depression part, 5 ... Master device, 7 ... Secondary battery, 9a, 9b ... External terminal, 11 ... Charging path, 13 ... Internal circuit, 15 ... Lead Switch, 17: Socket, 17a: Storage space, 17b: Notch, 19: Magnet, 21a, 21b: Charging terminal, 23: Charging circuit, 25: Detection lens, 27: IC, 29: Transistor, 31: Diode .. 33 current sensing resistors, 35, 37, 43 resistors, 39 comparators, 41 light emitting diodes, 45 regulator ICs

Claims (14)

In a charging system comprising a portable device that incorporates a secondary battery and operates by the power of the secondary battery, and a charging device that charges the secondary battery built in the portable device,
The charging device,
Holding means for holding the portable device;
A magnet located near the portable device held by the holding means,
With
In the portable device,
A reed switch that operates by the magnetic force of the magnet while the portable device is held by the holding unit, and connects the secondary battery to a charging path in the portable device to which charging power is supplied from the charging device. Is provided,
A charging system characterized by the following. The charging system according to claim 1,
The reed switch disconnects the secondary battery from an internal circuit that operates the portable device while connecting the secondary battery to the charging path.
A charging system characterized by the following. The charging system according to claim 1 or 2,
The charging device performs trickle charging after the secondary battery to which the charging power is supplied reaches a predetermined charge amount,
A charging system characterized by the following. The charging system according to any one of claims 1 to 3,
The holding means has a wall that covers the periphery of the portable device, and a cutout portion is formed in the wall.
A charging system characterized by the following. In the charging system according to any one of claims 1 to 4,
The holding means has a storage space for storing and holding the portable device,
In the portable device, the insertion side into the storage space has a semicircular shape,
A charging system characterized by the following. In the charging system according to any one of claims 1 to 4,
The holding means has a storage space for storing and holding the portable device,
The portable device and the storage space are shaped to fit only when the portable device is inserted into the storage space in a predetermined direction,
A charging system characterized by the following. The charging system according to any one of claims 1 to 6,
The reed switch and the magnet are provided at a position where the reed switch operates only in a state where the portable device is held in the holding unit in a predetermined direction;
A charging system characterized by the following. The charging system according to any one of claims 1 to 7,
In the charging path in the portable device, the external terminal of the portable device contacts the charging terminal of the charging device in a state where the portable device is held by the holding unit of the charging device, so that the charging device is connected to the charging device. Charging power is supplied from the charging terminal,
Further, the portable device has a concave portion, and the external terminal is disposed at the back of the concave portion,
The charging terminal of the charging device has a spring property to enter the recess and contact the external terminal,
A charging system characterized by the following. The charging system according to any one of claims 1 to 7,
In the charging path in the portable device, the external terminal of the portable device contacts the charging terminal of the charging device in a state where the portable device is held by the holding unit of the charging device, so that the charging device is connected to the charging device. Charging power is supplied from the charging terminal,
The charging terminal and the external terminal are provided at positions where they are in contact with each other only in a state where the portable device is held in a predetermined direction by the holding means,
A charging system characterized by the following. The charging system according to any one of claims 1 to 9,
The portable device is to detect biological information of the subject while being worn on the body of the subject,
A charging system characterized by the following. The charging system according to claim 10,
The charging device includes processing means for processing biological information detected by the mobile device,
The means for supplying the charging power operates on a power supply different from the power supply of the processing means,
A charging system characterized by the following. In the charging system according to claim 10 or 11,
The portable device has a detection unit for detecting the biological information on an outer surface,
The holding means holds the portable device in a state of covering the detection unit of the portable device,
A charging system characterized by the following. In a portable device incorporating a secondary battery and operating by the power of the secondary battery,
It operates by receiving a magnetic force from the outside, and comprises a reed switch for connecting the secondary battery to a charging path in the portable device to which charging power is supplied from the outside,
A portable device characterized by the following. A charging device for charging a secondary battery of the portable device according to claim 13,
Holding means for holding the portable device;
A magnet for operating a reed switch of the portable device held by the holding means,
A charging unit that supplies charging power to a charging path in the mobile device while the mobile device is held by the holding unit;
A charging device comprising:

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