JP2015226286A - Portable terminal equipment, terminal protection control method, and terminal protection control program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress electric corrosion of a terminal.SOLUTION: Portable terminal equipment has an external connection terminal for connecting an external device. The portable terminal equipment is configured to detect the short-circuiting of the external connection terminal in accordance with the resistance value of the external connection terminal, and to, when the short-circuiting is detected, detect the posture of the portable terminal equipment, and to execute vibration processing to vibrate the external connection terminal or heating processing to rise the temperature of the external connection terminal in accordance with the posture of the portable terminal equipment.

Description

  The present invention relates to a mobile terminal device, a terminal protection control method, and a terminal protection control program.

  In recent years, the number of waterproof portable terminals has increased. In such mobile terminals, coverless external connection terminals that have been secured with a practical waterproof function by increasing the internal configuration and mechanism so as to prevent moisture from entering the terminals are increasingly being used.

  However, even if practical waterproof performance can be ensured, if moisture enters the external connection terminal for some reason, the terminal is short-circuited, causing abnormal heat generation or erroneous detection. For this reason, there is a technique for determining a short-circuit state if the magnitude of the current flowing through the external connection terminal is greater than a specific current value, or a technique for stopping power supply to all or part of the circuit in the terminal when a short-circuit condition is detected. Are known.

JP 2004-235724 A JP 2010-35036 A

  However, in the above technique, short circuit detection due to moisture and power supply stoppage are executed after short circuit detection. However, since moisture remains on the external connection terminals, the external connection terminals are eroded.

  In one side, it aims at providing the portable terminal device which can suppress the electric corrosion of a terminal, the terminal protection control method, and a terminal protection control program.

  In the first proposal, the mobile terminal device has an external connection terminal for connecting an external device. The portable terminal device includes a detection unit that detects a short circuit of the external connection terminal according to a resistance value of the external connection terminal. When the detection unit detects the short circuit, the mobile terminal device vibrates the external connection terminal according to the attitude of the mobile terminal device, or generates heat to increase the temperature of the external connection terminal. The process execution part which performs is performed.

  According to one embodiment, electrolytic corrosion of the terminal can be suppressed.

FIG. 1 is a diagram for explaining the operation of the mobile phone according to the first embodiment. FIG. 2 is a diagram illustrating a hardware configuration example of the mobile phone according to the first embodiment. FIG. 3 is a diagram illustrating an example of information stored in the storage unit. FIG. 4 is a diagram illustrating the external connection control unit. FIG. 5 is a functional block diagram illustrating a functional configuration of the mobile phone according to the first embodiment. FIG. 6 is a flowchart illustrating the flow of the water wetness detection process according to the first embodiment. FIG. 7 is a flowchart illustrating the flow of the terminal drying process according to the first embodiment. FIG. 8 is a flowchart illustrating the flow of the continuation determination process according to the first embodiment. FIG. 9 is a diagram illustrating a change in the amount of moisture attached to the terminal of the mobile phone according to the second embodiment. FIG. 10 is a diagram for explaining a change in the resistance value of the terminal of the mobile phone according to the second embodiment. FIG. 11 is a flowchart illustrating the flow of the continuation determination process according to the second embodiment.

  Hereinafter, embodiments of a mobile terminal device, a terminal protection control method, and a terminal protection control program disclosed in the present application will be described in detail with reference to the drawings. Note that the present invention is not limited to the embodiments. Each embodiment can be appropriately combined within a consistent range.

[overall structure]
FIG. 1 is a diagram for explaining the operation of the mobile phone according to the first embodiment. As shown in FIG. 1, the mobile phone 1 is an example of a mobile terminal device having an external connection terminal 8 such as a micro USB (Universal Serial Bus) or HDMI (registered trademark) (High-Definition Multimedia Interface).

  The mobile phone 1 detects a short circuit of the external connection terminal 8 according to the resistance value of the external connection terminal 8. Then, when a short circuit is detected, the mobile phone 1 executes a vibration process that vibrates the external connection terminal 8 or a heat generation process that raises the temperature of the external connection terminal 8 according to the attitude of the mobile phone 1. For example, the mobile phone 1 executes a vibration function when the direction of the opening end of the external connection terminal 8 is downward, and executes heat generation by high load processing when the direction of the opening end of the external connection terminal 8 is upward.

  As described above, when the mobile phone 1 detects that the external connection terminal 8 is wet, the mobile phone 1 activates the vibrate function that vibrates the external connection terminal 8 or the external connection terminal 8 according to the direction of the opening end of the external connection terminal 8. Select and execute the heat generation process that warms up. Therefore, the mobile phone 1 can suppress the electric corrosion by removing the moisture adhering to the external connection terminal 8.

[Hardware configuration]
FIG. 2 is a diagram illustrating a hardware configuration example of the mobile phone according to the first embodiment. As shown in FIG. 2, the mobile phone 1 includes a battery 2, a vibrator 3, a storage unit 4, a display device 5, a heater 6, an external connection control unit 7, a terminal group 8, and a control unit 9. Note that the hardware exemplified here is an example, and the mobile phone 1 may have other hardware such as an acceleration sensor.

  The battery 2 is a battery of the mobile phone 1 and can be charged from a current source connected to the external connection terminal. The vibrator 3 is a device that vibrates the mobile phone 1 and is activated and stopped by instructions from the control unit 9.

  The storage unit 4 is a storage device that stores programs executed by the control unit 9 and various data, and is, for example, a memory or a hard disk. FIG. 3 is a diagram illustrating an example of information stored in the storage unit. As illustrated in FIG. 3, the storage unit 4 stores information in which an ID is associated with a resistance value. The ID is information for specifying an external device connected to the external connection control unit 7, and the resistance value indicates a normal resistance value when an external device is connected. In the case of FIG. 3, when the resistance value acquired by the external connection control unit 7 is between X and Y, it indicates that the device with ID = 01 is connected.

  The display device 5 is a display device that displays various types of information, such as a display or a touch panel. The heater 6 is an example of a heat generating device installed in the vicinity of the external connection control unit 7, and warms the external connection control unit 7 and the terminal group 8 according to an instruction from the control unit 9.

  The external connection control unit 7 is an example of an interface that is connected to the terminal group 8, detects connection of an external device, and executes processing according to the connected external device. The terminal group 8 is various terminals connected to an external device, and is an example of an external connection terminal. Here, the relationship between the external connection control unit 7 and the terminal group 8 will be described with reference to FIG.

  FIG. 4 is a diagram illustrating the external connection control unit. As shown in FIG. 4, the external connection control unit 7 includes a communication control unit 7a, a resistance value detection unit 7b, and a determination unit 7c, and each unit is realized by, for example, an electronic circuit. The terminal group 8 includes a VBUS terminal 8a, a D-terminal 8b, a D + terminal 8c, an ID terminal 8d, and a GND terminal 8e.

  The communication control unit 7 a is connected to each terminal of the terminal group 8 and the control unit 9. The resistance value detection unit 7b is connected to the ID terminal 8d, the GND terminal 8e, and the control unit 9. The determination unit 7 c is connected to the resistance value detection unit 7 b and the control unit 9.

  In such a state, when each terminal of the terminal group 8 is connected to the external connection control unit 7, it is connected to the communication control unit 7 a inside the external connection control unit 7. In addition, the resistance value detection unit 7b is installed in the previous stage of the communication control unit 7a, and acquires the resistance value between the ID terminal 8d and the GND terminal 8e for determining the type of the external device connected to the terminal group 8.

  The determination unit 7c searches the information stored in the storage unit 4 using the resistance value detected by the resistance value detection unit 7b as a key, and notifies the control unit 9 of the identified ID. On the other hand, when there is no ID corresponding to the detected resistance value, the determination unit 7c notifies the control unit 9 of the detection of the abnormality ID.

  In general, the resistance value detector 7b applies a voltage between the ID terminal 8d and the GND terminal 8e, and acquires a resistance value by measuring a current value. For this reason, when the ID terminal 8d and the GND terminal 8e are short-circuited due to moisture, the resistance value detection unit 7b acquires an abnormal resistance value and induces a malfunction, thereby causing a failure.

  In addition, the resistance value detection part 7b can acquire a resistance value at arbitrary timings according to various settings. For example, the resistance value detection unit 7b can be acquired periodically or when an instruction is given from the control unit 9.

  Returning to FIG. 2, the control unit 9 is a processing unit that controls processing of the entire mobile phone 1, and is an example of a CPU (Central Processing Unit), a DSP (Digital Signal Processor), or the like. For example, the control unit 9 executes execution control of various applications and wireless communication. In addition, when detecting a short circuit of the external connection control unit 7, the control unit 9 increases the temperature of the external connection control unit 7 or a vibration process that vibrates the external connection control unit 7 according to the attitude of the mobile phone 1. Perform heat generation processing.

[Function configuration]
FIG. 5 is a functional block diagram illustrating a functional configuration of the mobile phone according to the first embodiment. As shown in FIG. 5, the mobile phone 1 includes a detection determination unit 11, an external connection processing unit 12, a display control unit 13, a charging control unit 14, a water wetting processing unit 15, a vibrator processing unit 16, and a heat generation processing unit 17. . Each processing unit is an example of an electronic circuit included in the control unit 9 or an example of a process executed by the control unit 9.

  The detection determination unit 11 is a processing unit that detects a short circuit of the external connection terminal according to the resistance value of the external connection terminal. Specifically, the detection determination unit 11 determines whether the information notified from the external connection control unit 7 is a normal detection of an external device or a detection of an abnormal ID. Then, when the abnormality ID is notified, the detection determination unit 11 requests the water wetting processing unit 15 to execute the drying process.

  On the other hand, when the ID is notified, the detection determination unit 11 specifies the connected external device based on the association between the device name and the ID held in advance. Thereafter, the detection determination unit 11 executes processing according to the identified external device.

  For example, if the detection determination unit 11 detects the connection of the storage device, the detection determination unit 11 performs data writing and data reading with respect to the storage device via the external connection processing unit 12. Moreover, the detection determination part 11 charges electric power to the battery 2 using the charge control part 14, when the connection of a charger is detected.

  Further, when a predetermined time has elapsed after the start of the drying process, the detection determination unit 11 requests the external connection control unit 7 to reacquire the resistance value, and causes the external connection control unit 7 to determine a change in the resistance value. Then, when the resistance value transitions to a normal value, the detection determination unit 11 determines that the drying has been successful, and instructs the water wetting processing unit 15 described later to stop the drying process.

  On the other hand, when the resistance value remains an abnormal value, the detection determination unit 11 determines that the drying has failed, notifies the display control unit 13 (to be described later) that an error has occurred, and notifies the water wetting processing unit 15 of the drying process. Instruct to stop. The detection determination unit 11 can also periodically acquire and hold a resistance value from the external connection control unit 7.

  The external connection processing unit 12 is a processing unit that exchanges various types of information with an external device connected to the terminal group 8. For example, when a storage device is connected, the external connection processing unit 12 relays data reading and writing between the storage device and the application.

  The display control unit 13 is a processing unit that displays various types of information on the display device 5 and receives user input via the display device 5. For example, when the display control unit 13 receives an abnormality notification of the terminal group 8 from the water wetting processing unit 15, the display control unit 13 displays a message indicating that an external device cannot be connected on the display device 5.

  The charging control unit 14 is a processing unit that performs charging of the battery 2. For example, when the charger is connected to the terminal group 8, the charging control unit 14 connects the charger and the battery 2 to charge.

  The water wetting processing unit 15 includes a position specifying unit 15a and a selection execution unit 15b, and when these are used to detect water wetting of the external connection terminals included in the terminal group 8, the processing unit executes a drying process. is there.

  The position specifying unit 15 a is a processing unit that specifies the orientation of the open end of the terminal group 8 when receiving the execution request for the drying process from the detection determination unit 11. That is, the position specifying unit 15a specifies the direction of the connection unit that connects the external device.

  Specifically, the position specifying unit 15a specifies the posture of the mobile phone 1 using various known methods. Then, the position specifying unit 15a determines whether the orientation of the opening end of the terminal group 8 is more than a certain angle above or below the horizontal plane from the attitude of the mobile phone 1 and the installation position of the terminal group 8 in the mobile phone 1. It identifies whether it is suitable and notifies the selection execution part 15b. For example, the position specifying unit 15a can specify the posture of the mobile phone 1 using an acceleration sensor or the like.

  The selection execution unit 15b executes a vibration process for vibrating the terminal group 8 and the external connection control unit 7 or a heat generation process for increasing the temperature of the terminal group 8 and the external connection control unit 7 according to the attitude of the mobile phone 1. Is a processing unit.

  Specifically, the selection execution unit 15b executes vibration processing and heat generation processing when the open end of the terminal group 8 faces downward. For example, the selection execution unit 15b requests the vibrator processing unit 16 and the heat generation processing unit 17 to start processing. The order of request can be set arbitrarily. The selection execution unit 15b executes heat generation processing when the open end of the terminal group 8 is facing upward. For example, the selection execution unit 15b requests the heat generation processing unit 17 to start processing.

  The vibrator processing unit 16 is a processing unit that controls the vibrator 3. For example, the vibrator processing unit 16 activates the vibrator 3 when the application or the water wetting processing unit 15 requests the start of the vibration processing, and stops the vibrator 3 when the vibration processing is requested to stop.

  The heat generation processing unit 17 is a processing unit that increases the temperature of the terminal group 8 and the external connection control unit 7 using the heater 6 and the like. For example, the heat generation processing unit 17 activates the heater 6 when the water wetting processing unit 15 requests the start of the heat generation processing, and stops the heater 6 when the heat generation processing is requested to stop.

  As another example, when the start of the heat generation process is requested, the heat generation processing unit 17 inputs a dummy program to the CPU and causes the CPU to execute the dummy program. In this way, the heat generation processing unit 17 increases the processing load on the CPU, increases the temperature of the CPU, and increases the temperature of the terminal group 8 and the external connection control unit 7 using the temperature of the CPU. At this time, the heat generation processing unit 17 can also suppress the execution of the dummy program when the processing load of the CPU is equal to or greater than a predetermined value and the load is already high.

[Process flow]
Next, the flow of various processes executed by the mobile phone 1 according to the first embodiment will be described. Here, the water wetness detection process, the drying process, and the continuation determination process will be described.

(Water wetness detection process)
FIG. 6 is a flowchart illustrating the flow of the water wetness detection process according to the first embodiment. As shown in FIG. 6, the external connection control unit 7 of the mobile phone 1 acquires a resistance value when a change in the ID terminal of the terminal group 8 is detected (S101: Yes), that is, when the resistance value changes ( S102).

  Subsequently, the external connection control unit 7 determines whether or not the acquired resistance value is a normal value (S103). For example, the external connection control unit 7 determines whether an ID corresponding to the acquired resistance value is registered in the storage unit or the like.

  If the external connection control unit 7 determines that the acquired resistance value is a normal value (S103: Yes), the detection determination unit 11 performs a normal device connection process (S104).

  On the other hand, when the external connection control unit 7 determines that the acquired resistance value is an abnormal value (S103: No), the detection determination unit 11 performs a terminal drying process (S105). Specifically, the detection determination unit 11 requests the water wetting processing unit 15 to start a drying process.

(Drying process)
FIG. 7 is a flowchart illustrating the flow of the terminal drying process according to the first embodiment. As shown in FIG. 7, when the drying process is started, the water wetting processing unit 15 initializes the resistance value and the like accumulated so far (S201).

  Subsequently, the position specifying unit 15a acquires the posture information of the mobile phone 1 (S202), and determines whether the open end of the external connection terminal faces downward (S203).

  Then, when it is determined that the opening end faces downward (S203: Yes), the selection execution unit 15b activates the vibrator 3 via the vibrator processing unit 16 (S204), and further causes the heat generation processing unit 17 to operate. Then, heat generation is started (S205).

  On the other hand, if it is determined that the opening end is not facing downward (S203: No), the selection execution unit 15b stops the vibrator 3 when activated (S206), and then causes the heat generation processing unit 17 to stop. Then, heat generation is started (S205).

(Continuation judgment processing)
FIG. 8 is a flowchart illustrating the flow of the continuation determination process according to the first embodiment. As illustrated in FIG. 8, the external connection control unit 7 acquires the resistance value again when a predetermined time has elapsed after the start of the drying process (S301: Yes) according to an instruction from the detection determination unit 11 or the like (S302). Subsequently, the external connection control unit 7 determines whether or not the acquired resistance value is a normal value (S303).

  Then, when the external connection control unit 7 determines that the acquired resistance value is a normal value (S303: Yes), the detection determination unit 11 determines that the terminal is wet and the water is wet. The processing unit 15 is instructed to stop the drying process, and the drying process is terminated (S304).

  On the other hand, when it is determined by the external connection control unit 7 that the acquired resistance value is an abnormal value (S303: No), the detection determination unit 11 determines that the drying of the terminal has failed and sends an abnormality notification. Execute (S305). For example, the detection determination unit 11 notifies the display control unit 13 that terminal drying has failed, and the display control unit 13 causes the display device 5 to display a message indicating that an external device cannot be connected.

  Thereafter, the detection determination unit 11 instructs the water wetting processing unit 15 to stop the drying process, and ends the drying process (S306).

[effect]
Thus, the mobile phone 1 can remove moisture early when moisture adheres to the terminal in a non-submerged state. As a result, the mobile phone 1 can prevent erroneous detection and terminal erosion even when the cap of the external connection terminal is not present, or shortens the time when connection detection of an external device is stopped to prevent erroneous detection and terminal erosion. it can.

  In addition, since the mobile phone 1 can select a drying processing method according to the posture of the mobile phone 1, it is possible to execute appropriate processing that can be expected to be effective. In addition, the mobile phone 1 can be controlled so as not to operate the drying process for removing moisture, which is not expected to have an effect, and the current consumption used for the drying process can be improved. In addition, since the mobile phone 1 displays a message for suppressing the use of the terminal on the display or the like when there is no effect, the use of the unnecessary terminal can be suppressed and the possibility of the terminal being broken can be reduced.

  By the way, the mobile phone 1 can periodically acquire the resistance value after the start of the drying process, predict the effect of the drying process based on the change in the resistance value, and determine the continuation of the drying process. Therefore, in the second embodiment, an example will be described in which the mobile phone 1 periodically determines the continuation of the drying process after the drying process is started.

(Relationship between moisture content and resistance)
First, the relationship between the change in the amount of moisture adhering to the terminal group and the resistance value will be described, but the same applies to the heat generation process. FIG. 9 is a diagram illustrating a change in the amount of moisture attached to the terminal of the mobile phone according to the second embodiment. FIG. 10 is a diagram for explaining a change in the resistance value of the terminal of the mobile phone according to the second embodiment.

  State 1 shown in FIG. 9 is a state in which water droplets 60 are attached to the terminal group 8 of the mobile phone 1. When detecting the state 1, the cellular phone 1 starts vibration processing and heat generation processing (state 2). And if the mobile telephone 1 continues a vibration process, since the opening end (opening part) of a terminal has faced down, a water droplet will move to an opening end one by one with dead weight. For example, as shown in the state 3 to the state 5, the water droplet 60 gradually moves and is removed from the terminal group 8, and the evaporation of the water droplet 70 split from the water droplet 60 in the moving process is accelerated by heat generation and gradually disappears.

  That is, while vibration deformation or movement of the water droplet 60 or the water droplet 70 occurs, the short-circuit resistance between the ID terminal 8d and the GND terminal 8e sequentially changes due to the fluctuation of the size of the short-circuited water droplet. For example, by continuing the vibration process, the amount of water having conductivity that adheres to the terminal group 8 decreases, so that the resistance value of the terminal group 8 can be predicted to increase. On the other hand, even if the vibration treatment is continued, it can be predicted that the resistance value of the terminal group 8 does not increase if the conductive water amount attached to the terminal group 8 does not decrease. These states are shown in FIG.

  The upper diagram in FIG. 10 shows the change in resistance value when the moisture content decreases, and the lower diagram in FIG. 10 shows the change in resistance value when there is no change in moisture content. As shown in the upper diagram of FIG. 10, when moisture is normally removed, Δr / Δt (t = time, r = resistance value) indicating a change in resistance value is connected to an external device after moisture detection. Gradually increases to the specified value for the untreated state. On the other hand, as shown in the lower diagram of FIG. 10, when moisture is not normally removed, Δr / Δt (t = time, r = resistance value) indicating a change in resistance value does not change greatly after moisture detection.

  Therefore, if the change in the resistance value after the start of the vibration process is equal to or greater than the predetermined value, the mobile phone 1 continues the drying process to remove moisture. Stop the drying process to reduce unnecessary power consumption.

(Process flow)
FIG. 11 is a flowchart illustrating the flow of the continuation determination process according to the second embodiment. As shown in FIG. 11, when the terminal drying process is started (S401: Yes), the detection determination unit 11 acquires and accumulates a resistance value via the external connection control unit 7 (S402).

  Thereafter, the detection determination unit 11 continues the terminal drying process (S404) until a predetermined time has elapsed after the terminal drying process is started (S403: No), and periodically acquires and accumulates resistance values (S404). S402).

  Then, when a certain time has elapsed after the terminal drying process is started (S403: Yes), the detection determination unit 11 reads the accumulated resistance value (S405), and calculates a change in the resistance value (S406).

  Here, when the change in the resistance value has increased by a certain value or more (S407: Yes), the detection determination unit 11 repeats S404 and subsequent steps. That is, the detection determination unit 11 continues the drying process when the resistance value tends to increase. However, when the resistance value has reached the specified value, the detection determination unit 11 determines that the drying of moisture has been completed and ends the drying process.

  On the other hand, when the change in the resistance value is less than a certain value (S407: No), the detection determination unit 11 determines that the drying of the terminal has failed, and performs abnormality notification (S408). Thereafter, the detection determination unit 11 instructs the water wetting processing unit 15 to stop the drying process, and ends the drying process (S409).

[effect]
The mobile phone 1 can suppress the deterioration of the state due to the execution of a process that cannot be expected to be effective, and can shorten the time taken to dry the terminal. In addition, since the mobile phone 1 can suppress unnecessary processing, it is possible to reduce power consumption.

  Although the embodiments of the present invention have been described so far, the present invention may be implemented in various different forms other than the embodiments described above.

[moisture]
In the above embodiment, the case where moisture has adhered has been described as an example. However, the present invention is not limited to this, and any material that is electrically conductive can be treated in the same manner. Can do. For example, it is not limited to pure water, and various liquids can be similarly treated.

[External connection terminal example]
In the above embodiment, micro USB and HDMI (registered trademark) are illustrated as examples of the external connection terminals. However, the present invention is not limited to this, and any terminal can be used as long as it can detect charges. Can be applied to.

[Selection example of drying treatment]
For example, the cellular phone 1 refers to the usage rate of the CPU when starting the drying process, and when the usage rate is a high load equal to or higher than a predetermined value, only the vibration process is performed, and the usage rate is lower than the predetermined value. In this case, both vibration processing and heat generation processing can be executed.

[Suppression of drying treatment]
For example, the mobile phone 1 can transmit an instruction to stop the ID detection to the external connection control unit 7 when the drying process is stopped because drying cannot be expected. That is, the water-wetting processing unit 15 of the mobile phone 1 suppresses detection of an external device when the attached moisture cannot be removed. As a result, detection of an external device in a state where moisture is attached can be suppressed, so that the possibility of failure can be reduced.

  In addition, when the water wetting processing unit 15 of the mobile phone 1 receives an instruction to cancel suppression of external device detection via a touch panel or the like, the water wetting processing unit 15 may transmit an instruction to resume detection of ID to the external connection control unit 7. it can. As a result, the detection of the external device can be resumed at the user's discretion, improving convenience.

[system]
Further, each configuration of the illustrated apparatus does not necessarily need to be physically configured as illustrated. That is, it can be configured to be distributed or integrated in arbitrary units. Further, all or any part of each processing function performed in each device may be realized by a CPU and a program analyzed and executed by the CPU, or may be realized as hardware by wired logic.

  In addition, among the processes described in this embodiment, all or part of the processes described as being performed automatically can be performed manually, or the processes described as being performed manually can be performed. All or a part can be automatically performed by a known method. In addition, the processing procedure, control procedure, specific name, and information including various data and parameters shown in the above-described document and drawings can be arbitrarily changed unless otherwise specified.

DESCRIPTION OF SYMBOLS 1 Mobile phone 2 Battery 3 Vibrator 4 Memory | storage part 5 Display apparatus 6 Heater 7 External connection control part 8 Terminal group 11 Detection determination part 12 External connection process part 13 Display control part 14 Charge control part 15 Water-wetting process part 15a Position specification part 15b Selection execution unit 16 Vibrator processing unit 17 Heat generation processing unit

Claims (8)

In a mobile terminal device having an external connection terminal for connecting an external device,
A detection unit for detecting a short circuit of the external connection terminal according to a resistance value of the external connection terminal;
When the detection unit detects the short-circuit, a process for executing a vibration process for vibrating the external connection terminal or a heat generation process for increasing the temperature of the external connection terminal according to the attitude of the mobile terminal device And a portable terminal device.   The processing execution unit executes the vibration process and the heat generation process when the opening of the external connection terminal is below horizontal, and performs the heat generation process when the opening of the external connection terminal is above horizontal. The mobile terminal device according to claim 1, wherein the mobile terminal device is executed. The detection unit acquires a resistance value of the external connection terminal after a predetermined time has elapsed from the start of execution of the vibration process or the heat generation process by the process execution unit, and detects the state of the external connection terminal,
When the detection unit does not detect a short circuit of the external connection terminal, the processing execution unit ends the vibration process and the heat generation process, and when the detection unit detects a short circuit of the external connection terminal, The portable terminal device according to claim 1 or 2, wherein the vibration process or the heat generation process is continued. The detection unit acquires the resistance value of the external connection terminal at a predetermined interval while the processing execution unit executes the vibration processing or the heat generation processing,
The process execution unit includes a resistance value of the external connection terminal after a predetermined time from the start of the vibration process or the heat generation process, and a resistance value of the external connection terminal when the vibration process or the heat generation process is started. 3. The portable terminal device according to claim 1, wherein the vibration process or the heat generation process that is being executed is terminated when the difference between the two is within a predetermined range.   When the process execution unit ends the vibration process or the heat generation process being executed, the process execution unit further includes a suppression unit that suppresses execution of a detection process that detects that the external device is connected to the external connection terminal. The mobile terminal device according to claim 4, wherein   The suppression unit displays on the predetermined display device that the execution of the detection process is suppressed, and restarts the execution of the detection process when an instruction to start the detection process is given by a user operation. The portable terminal device according to claim 5. A mobile terminal device having an external connection terminal for connecting an external device,
Detecting a short circuit of the external connection terminal according to the resistance value of the external connection terminal,
When the short circuit is detected, it includes a process of executing a vibration process of vibrating the external connection terminal or a heat generation process of increasing the temperature of the external connection terminal according to the attitude of the mobile terminal device. A terminal protection control method. To a mobile terminal device having an external connection terminal for connecting an external device,
Detecting a short circuit of the external connection terminal according to the resistance value of the external connection terminal,
When the short circuit is detected, a vibration process for vibrating the external connection terminal or a heat generation process for increasing the temperature of the external connection terminal is executed according to the attitude of the mobile terminal device. A terminal protection control program.

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