JP2010177000A - Electronic equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide electronic equipment enhancing safety when the fuel of a fuel cell leaked by a shock. <P>SOLUTION: A cellular phone 1 includes a casing, an electronic circuit mounted on the casing, a fuel cell 40 and a fuel tank 41, an acceleration sensor 33 detecting possibility of fuel leakage from the fuel cell 40 or the fuel tank 41 by measuring shock applied to the casing, and a CPU 30 limiting current supply to the electronic circuit when the possibility of the fuel leakage is detected with the acceleration sensor 33. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an electronic device equipped with a fuel cell.

Conventionally, a small direct methanol fuel cell (DMFC, Direct Methanol Fuel Cell) using methanol (CH ₃ OH) as a fuel is known as a fuel cell for electronic devices. In an electronic device equipped with such a fuel cell, it is necessary to consider safety for preventing ignition due to fuel leakage.

  For example, in Patent Document 1, a fuel cell mounting chamber in which a fuel cell is mounted and a function mounting chamber in which a functional part of an electronic device is mounted are separated by an airtight partition that prevents gas movement, and a function mounting chamber serving as an ignition source. It has been proposed to prevent fuel vapor from flowing into the tank. Patent Document 1 also shows that an exhaust port leading from the function mounting chamber to the outside air is provided, and fuel vapor is released from the exhaust port before reaching the flammable concentration when fuel leaks.

JP 2007-80630 A

  By the way, the fuel leakage of the fuel cell mounted on the electronic device often occurs when the fuel cell main body or the fuel tank is damaged by a strong impact such as dropping or collision. In this case, there is a concern that the airtight partition that separates the fuel cell mounting chamber from the function mounting chamber is also damaged, but it is difficult to determine the degree of damage from the appearance of the electronic device. Therefore, the user may not be aware of these damages and may continue to use the electronic device in a state where fuel is leaking.

  SUMMARY OF THE INVENTION An object of the present invention is to provide an electronic device that can improve safety when fuel in a fuel cell leaks due to an impact.

  An electronic device according to the present invention includes a housing, an electronic circuit mounted on the housing, a fuel cell unit, a detection unit that detects the possibility of fuel leakage from the fuel cell unit, and the detection unit. And a control unit that limits energization to the electronic circuit when the possibility of fuel leakage is detected.

  Moreover, it is preferable that the said detection part detects the possibility of the fuel leak from the said fuel cell part by measuring the impact to the said housing | casing.

  The electronic device according to the present invention includes a plurality of types of the electronic circuits, and the control unit limits energization of the plurality of types of electronic circuits according to a level of impact measured by the detection unit. It is preferable to change the electronic circuit.

  Moreover, it is preferable that the electronic device according to the present invention includes a notification unit that performs different notifications according to the measured impact level or the type of the electronic circuit.

  Moreover, it is preferable that the said alerting | reporting part alert | reports that the electricity supply to the said electronic circuit is restrict | limited according to the use request | requirement of the electronic circuit in which electricity supply was restrict | limited by the said control part.

  The electronic apparatus according to the present invention preferably includes a triaxial acceleration sensor that measures acceleration values in three directions independent of each other.

  The electronic device according to the present invention further includes a storage unit that stores a determination table that classifies the impact level according to a value expressed by a square of acceleration, and the detection unit includes the triaxial acceleration sensor. It is preferable to determine the level of the impact by comparing the sum of values obtained by squaring the acceleration values in the three directions to be measured with the values in the determination table stored in the storage unit.

  The electronic apparatus according to the present invention further includes a storage unit that stores a determination table in which the impact level is classified according to a value represented by a jerk, and the detection unit is configured to measure the three-axis acceleration sensor. It is preferable that the impact level is determined by comparing the jerk calculated from the acceleration value in the direction with the value in the determination table stored in the storage unit.

  In the determination table, the storage unit includes a ratio of an acceleration value in the second direction to an acceleration value in the first direction among the three directions independent from each other, and a first value for the acceleration value in the first direction. The impact level is classified and stored in accordance with the acceleration value ratio in the direction 3 and the acceleration direction represented by the acceleration direction, and the detection unit measures the magnitude of the acceleration measured by the three-axis acceleration sensor and the acceleration value. It is preferable to determine the impact level by comparing the direction and the value of the determination table stored in the storage unit.

  Moreover, it is preferable that the said control part restrict | limits the electricity supply to the said electronic circuit, when the state where the said acceleration value is below a fixed value including 0 continues for more than predetermined time.

  Moreover, it is preferable that the said detection part detects the possibility of the fuel leak from the said fuel cell part based on the change rate of the residual amount of the fuel used for the said fuel cell part.

  Moreover, it is preferable that the said control part restrict | limits the electricity supply to the said electronic circuit after progress of predetermined time after the possibility of a fuel leak is detected by the said detection part.

  Further, the control unit determines the predetermined time according to a change rate of a remaining amount of fuel used in the fuel cell unit from the time when the possibility of fuel leakage is detected by the detection unit, It is preferable to limit energization to the electronic circuit after a predetermined time has elapsed.

  ADVANTAGE OF THE INVENTION According to this invention, the safety | security when the fuel of a fuel cell leaks by the impact can be improved.

1 is an external perspective view of a mobile phone according to an embodiment of the present invention. It is a block diagram which shows the function of the mobile telephone which concerns on embodiment of this invention. It is a figure which shows the impact determination table which concerns on embodiment of this invention. It is a figure which shows the restriction | limiting content table which concerns on embodiment of this invention. It is a figure which shows the alerting | reporting content table which concerns on embodiment of this invention. It is a figure which shows the flow of a process at the time of detecting the fall of the mobile telephone which concerns on embodiment of this invention. It is a figure which shows the flow of a process when the mobile telephone which concerns on embodiment of this invention detects an impact. It is a figure which shows the flow of a process when there exists operation input, after the mobile telephone which concerns on embodiment of this invention starts the restriction | limiting operation | movement A. It is a figure which shows the flow of a process of the restriction | limiting operation | movement B in the mobile telephone which concerns on embodiment of this invention.

  Hereinafter, an example of a preferred embodiment of the present invention will be described. In addition, although the mobile telephone 1 is demonstrated as an example of an electronic device, this invention is not limited to this. For example, in addition to PHS (Personal Handy phone System) and PDA (Personal Digital Assistant), the present invention can be applied to various electronic devices such as personal computers and game machines.

  FIG. 1 is an external perspective view of a mobile phone 1 according to the present embodiment. FIG. 1 shows a so-called foldable mobile phone, but the mobile phone according to the present invention is not limited to this. For example, a sliding type in which one casing is slid in one direction from a state in which both casings are overlapped, or a rotary type in which one casing is rotated around an axis along the overlapping direction ( Turn type), or a type (straight type) in which the operation unit and the display unit are arranged in one housing and does not have a connecting unit.

  The mobile phone 1 includes an operation unit side body 2 and a display unit side body 3. The operation unit side body 2 includes an operation unit 11 and a microphone 12 into which a voice uttered by a user of the mobile phone 1 is input on the surface unit 10. The operation unit 11 includes a function setting operation button 13 for activating various functions such as various setting functions, a telephone book function, and a mail function, and an input operation button 14 for inputting numbers of telephone numbers, mail characters, and the like. , And a determination operation button 15 for performing determination and scrolling in various operations.

  The display unit side body 3 includes a display unit 21 for displaying various types of information on the surface unit 20 and a receiver 22 for outputting the voice of the other party of the call.

  Further, the upper end portion of the operation unit side body 2 and the lower end portion of the display unit side body 3 are connected via a hinge mechanism 4. In addition, the mobile phone 1 relatively rotates the operation unit side body 2 and the display unit side body 3 which are connected via the hinge mechanism 4, so that the operation unit side body 2 and the display unit side body 3 are rotated. The body 3 can be in an open state (open state), or the operation unit side body 2 and the display unit side body 3 can be folded (folded state).

  FIG. 2 is a block diagram showing functions of the mobile phone 1 according to the present embodiment. The mobile phone 1 includes an operation unit 11, an OLED (Organic Light Emitting Diode) 21 a and an LED (Light Emitting Diode) 21 b as a display unit 21, a CPU 30, a radio unit 31, an audio unit 32, an acceleration sensor 33, and the like. A vibration motor 34, a charge control unit 35, a secondary battery 36, a memory 37, a fuel cell 40 as a fuel cell unit, a fuel tank 41, and a reaction heater 42 are provided.

  The CPU 30 controls the entire mobile phone 1. For example, the display unit 21, the radio unit 31, the audio unit 32, the vibration motor 34, or the charging control unit 35 related to charging the secondary battery 36, and further the fuel Predetermined control is performed on the reaction heater 42 and the like for operating the battery 40. In addition, the CPU 30 receives input from the operation unit 11, the acceleration sensor 33, the fuel tank 41, or the like, and executes various processes. Then, the CPU 30 controls the memory 37 to read various programs and data, and write data when executing processing. The CPU 30 includes a detection unit, a control unit, and a notification unit.

  The display unit 21 (OLED 21a, LED 21b) performs predetermined image processing under the control of the CPU 30. Then, the processed image data is stored in the frame memory and output to the screen at a predetermined timing.

  The wireless unit 31 communicates with an external device in a predetermined use frequency band (for example, 800 MHz). Then, the radio unit 31 demodulates the signal received from the antenna (not shown), supplies the processed signal to the CPU 30, modulates the signal supplied from the CPU 30, and transmits the signal from the antenna to the external device. Send.

  The sound unit 32 performs predetermined sound processing on the signal supplied from the wireless unit 31 according to the control of the CPU 30, and outputs the processed signal to the receiver 22. The receiver 22 outputs the signal supplied from the audio unit 32 to the outside. This signal may be output from a speaker (not shown) instead of or together with the receiver 22.

  In addition, the voice unit 32 processes the signal input from the microphone 12 according to the control of the CPU 30 and outputs the processed signal to the wireless unit 31. The radio unit 31 performs predetermined processing on the signal supplied from the audio unit 32 and outputs the processed signal from the antenna.

  As shown in FIG. 1, the acceleration sensor 33 is a three-axis (three-dimensional) type that detects acceleration in three directions orthogonal to each other in the X-axis direction, the Y-axis direction, and the Z-axis direction. Based on force (F) and mass (m), acceleration (a) is measured (acceleration (a) = force (F) / mass (m)). In addition, although the acceleration sensor 33 of this embodiment was a 3-axis type, it is not restricted to this. For example, the number of axes may be simply one or two, or a multi-axis sensor having four or more axes may be used for accurate detection.

  Moreover, the acceleration sensor 33 measures the force applied to a predetermined mass by a piezoelectric element, for example, calculates the acceleration for each axis, converts it into numerical data, and buffers it. Then, the detection unit reads the acceleration data periodically buffered. The acceleration sensor 33 is not limited to a piezoelectric element (piezoelectric type), but may be a MEMS (Micro Electro Mechanical Systems) type such as a piezoresistive type, a capacitance type, a thermal detection type, or a feedback coil by moving a movable coil. And a servo gauge type that measures strain caused by acceleration with a strain gauge, or the like.

  The vibration motor 34 generates vibration according to the control of the CPU 30, and is used for notification of incoming calls and mails, effects when an application is executed, and the like.

  The charging control unit 35 is a circuit that controls charging of the secondary battery 36 that supplies power to each unit of the mobile phone 1.

  The memory 37 includes a storage unit, for example, includes a working memory, and is used for arithmetic processing by the CPU 30. Specifically, for example, an impact determination table (FIG. 3), a restriction content table (FIG. 4), a notification content table (FIG. 5), etc., which will be described later, are stored. Note that the memory 37 may also serve as a removable external memory.

  The fuel cell 40 is supplied with methanol as a fuel from a fuel tank 41 and generates a chemical reaction by heat generated by the reaction heater 42 to generate electric power. The electric power generated by the fuel cell 40 is charged to the secondary battery 36 by the charge control unit 35.

  Here, the remaining amount of fuel stored in the fuel tank 41 is appropriately read by the CPU 30 to determine the amount of electric power that can be extracted from the fuel cell 40. The reaction heater 42 operates based on a control signal from the CPU 30 and controls power generation by the fuel cell 40.

  Hereinafter, operations of the acceleration sensor 33 and the CPU 30 will be described. The acceleration sensor 33 periodically detects the acceleration value applied to the mobile phone 1 as acceleration data. And a detection part reads this.

  The detection unit calculates the strength and direction of the generated impact (acceleration greater than or equal to a predetermined value) based on the detected acceleration data. Specifically, the impact strength is calculated by squaring the acceleration values in the X-axis direction, the Y-axis direction, and the Z-axis direction, and calculating the sum of these three square values. This sum is equal to the square of the magnitude of the acceleration, thereby judging the strength of the impact caused by dropping or the like.

  The direction of the impact is determined by the ratio of the acceleration value in the Y-axis direction to the acceleration value in the X-axis direction (Y / X), the ratio of the acceleration value in the Z-axis direction to the acceleration value in the X-axis direction (Z / X), , These show tan θ when the angle between the XZ plane and the acceleration vector is θ, and tan φ when the angle between the XY plane and the acceleration vector is φ.

  The direction of impact may be expressed using polar coordinates, but can be calculated by four arithmetic operations by using tangent (tan), so that the processing load can be reduced and the numerical accuracy can be further increased. And a detection part detects the possibility of a fuel leak by detecting an impact.

  FIG. 3 is a diagram showing an impact determination table according to the present embodiment. Based on this table, the detection unit determines an impact level (acceleration level) when the mobile phone 1 is dropped.

  Here, the impact level is classified by the folder state (open state or folded state) of the mobile phone 1 and the direction of impact. Further, the impact level is subdivided according to the strength and duration of the impact. For example, even in the same impact direction, the impact level is classified into “impact level A” and “impact level B” according to the impact strength. .

  Here, the impact level A refers to an impact to the extent that there is a concern that the casing of the mobile phone 1 has been damaged and a damaged circuit can serve as an ignition source. Further, the impact level B refers to a certain degree of impact that may cause fire if there is a concern that the casing of the mobile phone 1 is broken and fuel leaks.

  In addition, regarding the impact direction, a range is provided, and within the range, the direction is the same. According to the data in the first row of FIG. 3, for example, “1.00: 1.50: −2.00” and “1.00: 1.60: −2.10” are the same as the impact direction. Is recognized as a direction.

Further, according to the data in the first row of FIG. 3, if an impact of “1200000G ² ” or more and less than “4800000G ² ” continues for “300 msec” or more, an impact of “impact level A” or “480,000 G ² ” or more is obtained. If it lasts for “300 milliseconds” or more, it is determined as “impact level B”.

  In FIG. 3, ranges are provided independently for “Y / X” and “Z / X” as impact directions, but are not limited thereto. For example, a range may be provided as a predetermined polygon surface. In this case, when the line segment indicated by the impact direction intersects a predetermined triangular surface, the same impact direction is set.

  In the impact determination table in FIG. 3, the square of the magnitude of acceleration is used as the impact strength, but the present invention is not limited to this. For example, the impact strength may be expressed by jerk (time differentiation of acceleration, jerk). Since the impact caused by the drop generates a large acceleration, depending on the type of the acceleration sensor 33 to be used, the detection range may be exceeded or the acceleration sensor 33 itself may be damaged. In such a case, the impact level may be determined before the acceleration sensor 33 is damaged by determining the impact level based on the jerk.

  Next, the control unit restricts energization to the electronic circuit included in the mobile phone 1 when the possibility of fuel leakage is detected. Specifically, the electronic circuit block that can be an ignition source is, for example, the reaction heater 42, the vibration motor 34 that is concerned about the spark of the brush, the OLED 21a and the LED 21b having a booster circuit, and the like. The control unit limits energization to these electronic circuit blocks. The control unit may limit energization after a predetermined time has elapsed after detecting the possibility of fuel leakage. Further, the control unit changes the electronic circuit block that limits energization according to the measured level of impact.

  FIG. 4 is a diagram showing a restriction content table according to the present embodiment. Here, for each electronic circuit block that restricts energization, the restriction content according to the impact level is defined.

  In FIG. 4, for example, “reaction heater” is a restriction target for both “impact level A” and “impact level B”, and the restriction content is prohibition of energization. “OLED” is not a restriction target at “impact level A”, but energization is prohibited at “impact level B”. In addition, “LED” is set to the low-light mode by prohibiting boosting in the boosting circuit at “impact level B”.

  FIG. 5 is a diagram showing a notification content table according to the present embodiment. The notification unit notifies the user of the restriction content on the display unit 21 (for example, the LED 21b that is energized in the low light mode even at the impact level B). Here, the notification content corresponding to the impact level is defined for each electronic circuit block or predetermined event.

  According to FIG. 5, for example, immediately after detecting an impact, the notification unit notifies the user that the impact has been detected and prompts the user to undergo an examination. Further, when a use request for an electronic circuit block whose energization is restricted is received, a notification is given that the electronic circuit block is restricted.

  Further, when the impact level B is detected, there is a concern about fuel leakage, so the CPU 30 turns off the power of the mobile phone 1 after a predetermined time (for example, several minutes) has elapsed. In addition, since the notification unit notifies that the power is turned off after a predetermined time has elapsed, it is possible to give a grace period for the user to perform some operations before the power is turned off.

  Hereinafter, the flow of processing in the CPU 30 is shown. In the present embodiment, the restriction of energization is started in response to the detection of the fall, and then the restriction content is adjusted in response to the detection of the impact due to the drop.

  FIG. 6 is a diagram showing a flow of processing when the fall of the mobile phone 1 according to the present embodiment is detected. The detection unit determines that there is a possibility of falling when the acceleration sensor detects that the magnitude of acceleration is “0G” or a predetermined range near “0G”, and starts this processing by interruption. To do.

  In step S <b> 11, the detection unit determines, based on the detection value of the acceleration sensor 33, whether or not a state near the acceleration “0G” indicating that the vehicle is falling has passed a predetermined time. If this determination is YES, it is determined that the mobile phone 1 has dropped, and the process proceeds to step S13. On the other hand, if this determination is NO, the state in the vicinity of “0G” continues only for a short time, and there is a possibility that the state has become “0G” instantaneously instead of dropping, and the process proceeds to step S12.

  In step S12, the detection unit determines whether or not the state near the detected acceleration “0G” continues. If this determination is YES, there remains a possibility that the predetermined time has passed and it is determined that the vehicle has fallen, so the process returns to step S11. On the other hand, if this determination is NO, it is determined that it is not dropped, and energization is not limited at this point.

  In step S13, since the detection unit determines that the mobile phone 1 is falling, the control unit stops energizing the electronic circuit block that can be an ignition source in preparation for the possibility of receiving an impact after this. To do.

  With this processing, the control unit can stop the electronic circuit block in preparation for damage before receiving an impact caused by dropping. Therefore, for example, even when damage due to an impact is severe and control becomes impossible, an electronic circuit block that can cause secondary damage such as ignition can be stopped before the impact is received.

  Thereafter, when the acceleration changes from a state near “0G” and an impact is detected, the control unit starts a new limiting process (FIG. 7).

  FIG. 7 is a diagram showing a flow of processing when the mobile phone 1 according to the present embodiment detects an impact.

  In step S <b> 21, the detection unit calculates the direction and strength of the impact based on the detection value of the acceleration sensor 33.

  In step S22, the detection unit determines the impact level by comparing the direction and strength of the impact calculated in step S21 with the impact determination table (FIG. 3). When the impact level is less than A, it is determined that the limiting operation is unnecessary, and the normal operation is performed. If the impact level is greater than or equal to A and less than B, the process proceeds to step S23 to start the limiting operation. On the other hand, if the impact level is B or higher, the process proceeds to step S26 to start the limiting operation.

  In step S23, the control unit obtains the restriction target list 1 corresponding to “impact level A” from the restriction content table (FIG. 4). Thereby, the electronic circuit block which should restrict | limit electricity supply is determined.

  In step S24, the control unit acquires the restriction content a corresponding to the restriction target electronic circuit block determined in step S23 from the restriction content table (FIG. 4).

  In step S <b> 25, the notification unit refers to the notification content table (FIG. 5), acquires the notification content A regarding “impact level A”, and displays the notification content corresponding to the control event “immediately after detection”. Thereafter, the CPU 30 proceeds to the limiting operation A (FIG. 8). Specifically, the control unit limits energization to the target electronic circuit block according to the acquired restriction content a. When the energization to the electronic circuit block that can be an ignition source is stopped by detecting the fall before the impact is detected, the control unit energizes the target electronic circuit block according to the acquired restriction a. Switch to limit.

  In step S26, the control unit obtains the restriction target list 2 corresponding to “impact level B” from the restriction content table (FIG. 4). Thereby, the electronic circuit block which should restrict | limit electricity supply is determined.

  In step S27, the control unit obtains the restriction content b corresponding to the restriction target electronic circuit block determined in step S26 from the restriction content table (FIG. 4).

  In step S28, the notification unit refers to the notification content table (FIG. 5), acquires notification content B regarding “impact level B”, and displays the notification content corresponding to the control event “immediately after detection”. Thereafter, the CPU 30 proceeds to the limiting operation B (FIG. 9). Specifically, the control unit limits energization to the target electronic circuit block according to the acquired restriction content a. When the energization of the electronic circuit block that can be the ignition source is stopped by detecting the fall before the impact is detected, the control unit energizes the target electronic circuit block according to the acquired restriction content b. Switch to limit.

  In this embodiment, after the notification content is displayed, the operation moves to the restriction operation A or B. However, the operation may move to the restriction operation A or B without displaying the notification content.

  FIG. 8 is a diagram showing the flow of processing when there is an operation input after the mobile phone 1 according to the present embodiment starts the restriction operation A.

  In step S31, the CPU 30 receives an operation input from the user. When the mobile phone 1 is in a normal operation, the related electronic circuit block is operated in response to the operation input. However, when the mobile phone 1 is in a limiting operation, the process proceeds to step S32.

  In step S32, based on the restriction content table (FIG. 4), the control unit requests that the operation input received in step S31 requests the restriction target event or the operation of the restriction target electronic circuit block. Determine whether or not. If this determination is YES, the process proceeds to step S34, and if the determination is NO, the process proceeds to step S33.

  In step S33, the control unit determines that the requested event is not related to the electronic circuit block to be restricted, and performs normal control without restriction.

  In step S34, since the requested event causes the electronic circuit block to be restricted to operate, the control unit displays the notification content indicating that the restriction is being performed based on the notification content table (FIG. 5). .

  Note that the restricting operation of this process may be canceled by a predetermined operation. That is, when it is determined by inspection that there is no risk of secondary damage, the restricting operation can be canceled by a predetermined operation and returned to the normal operation.

  FIG. 9 is a diagram illustrating a processing flow of the restricting operation B in the mobile phone 1 according to the present embodiment.

  In step S41, the control unit starts a protection timer that measures a predetermined time as a delay time until the fuel leaked from the fuel cell 40 or the fuel tank 41 reaches the ignition concentration.

  In step S42, the control unit acquires the remaining amount of fuel from the fuel tank 41, and corrects the measurement time of the protection timer based on the amount of change in the remaining amount. That is, when the remaining amount of fuel is drastically decreasing, it can be determined that the fuel leaks earlier than expected, so the predetermined time until the mobile phone 1 is turned off is shortened.

  In step S43, the notifying unit limits the electronic circuit block according to the user operation as in the case where there is an operation input after starting the limiting operation A (FIG. 8) until a predetermined time elapses. The content of the notification indicating that it is is displayed.

  In step S44, the control unit determines whether or not a protection timer for measuring a predetermined time has expired. If this determination is YES, the mobile phone 1 is turned off to avoid igniting the fuel. On the other hand, if the determination is NO, it is determined that it is still within the grace period, and the process returns to step S42.

  As mentioned above, although embodiment of this invention was described, this invention is not restricted to embodiment mentioned above. The effects described in the embodiments of the present invention are only the most preferable effects resulting from the present invention, and the effects of the present invention are limited to those described in the embodiments of the present invention. is not.

  In the above-described embodiment, the possibility of fuel leakage is detected by determining the impact on the housing by the acceleration sensor 33, but is not limited thereto. For example, by monitoring the remaining amount of fuel acquired from the fuel tank 41, the possibility of fuel leakage may be detected based on the change rate of the remaining amount of fuel. In this case, the acceleration sensor 33 is not required, but both the impact level based on the acceleration value and the change in the remaining amount of fuel may be used as the limiting operation determination conditions.

  Moreover, in the above-mentioned embodiment, although the impact level was classified into two types of A or B, it is not restricted to this, You may subdivide further. In this case, the restricting operation can be defined more finely.

1 Mobile phone (electronic equipment)
2 Operation unit side case (case)
3 Display side housing (housing)
11 Operation part 21 Display part 21a OLED (electronic circuit)
21b LED (electronic circuit, notification unit)
30 CPU (detection unit, control unit, notification unit)
31 Radio unit 32 Audio unit 33 Acceleration sensor (detection unit)
34 Vibration motor (electronic circuit)
35 Charging control unit 36 Secondary battery 37 Memory (storage unit)
40 Fuel Cell 41 Fuel Tank 42 Reaction Heater (Electronic Circuit)

Claims (13)

A housing,
An electronic circuit mounted on the housing;
A fuel cell unit;
A detection unit for detecting the possibility of fuel leakage from the fuel cell unit;
An electronic device comprising: a control unit that limits energization of the electronic circuit when the detection unit detects the possibility of fuel leakage.   The electronic device according to claim 1, wherein the detection unit detects the possibility of fuel leakage from the fuel cell unit by measuring an impact on the housing. A plurality of the electronic circuits are provided,
The electronic device according to claim 2, wherein the control unit changes an electronic circuit that restricts energization among the plurality of types of electronic circuits in accordance with an impact level measured by the detection unit. .   The electronic device according to claim 2, further comprising a notification unit that performs different notifications according to the measured impact level or the type of the electronic circuit.   5. The electronic device according to claim 4, wherein the notifying unit notifies that energization to the electronic circuit is restricted in response to a use request of the electronic circuit to which energization is restricted by the control unit. machine.   6. The electronic apparatus according to claim 2, further comprising a triaxial acceleration sensor that measures acceleration values in three directions independent from each other. A storage unit for storing a determination table in which the impact level is classified according to a value represented by a square dimension of acceleration;
The detection unit compares the sum of values obtained by squaring the acceleration values in the three directions measured by the three-axis acceleration sensor with a value in the determination table stored in the storage unit, thereby The electronic apparatus according to claim 6, wherein a level is determined. A storage unit that stores a determination table that classifies the level of impact according to a value represented by jerk;
The detection unit compares the jerk calculated from the acceleration values in the three directions measured by the three-axis acceleration sensor with the value of the determination table stored in the storage unit, thereby determining the level of the impact. The electronic device according to claim 6, wherein the electronic device is determined. In the determination table, the storage unit includes a ratio of the acceleration value in the second direction to the acceleration value in the first direction among the three independent directions, and a third value for the acceleration value in the first direction. The impact level is classified and stored according to the ratio of acceleration values in the direction and the direction of acceleration represented by
The detection unit determines the level of the impact by comparing the magnitude of the acceleration measured by the three-axis acceleration sensor and the direction of the acceleration with the value of the determination table stored in the storage unit. The electronic device according to claim 7 or 8, wherein   7. The electronic device according to claim 6, wherein the control unit restricts energization to the electronic circuit when the state where the acceleration value is equal to or less than a certain value including 0 continues for a predetermined time or longer. machine.   11. The detection unit according to claim 1, wherein the detection unit detects a possibility of fuel leakage from the fuel cell unit based on a change rate of a remaining amount of fuel used in the fuel cell unit. The electronic device according to any one of the above.   12. The control unit according to any one of claims 1 to 11, wherein the control unit limits energization to the electronic circuit after a predetermined time has elapsed since the possibility of fuel leakage was detected by the detection unit. Item 1. An electronic device according to item 1.   The control unit determines the predetermined time according to a change rate of a remaining amount of fuel used in the fuel cell unit from the time when the detection unit detects the possibility of fuel leakage. The electronic device according to claim 12, wherein energization of the electronic circuit is restricted after a predetermined time has elapsed.

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