JP2011041409A - Cellular phone battery charger with security function - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cellular phone battery charger which provides a variety of security functions during charging with no structural change to a conventional cellular phone. <P>SOLUTION: A battery charger 1 includes a DC power source 25 which generates a DC voltage for charging a cellular phone 8, a charging cable 5 which is connected to the cellular phone 8 for supplying a DC voltage for charging, a monitor circuit 30 which detects that an electrification path to the cellular phone 8 is cut off during charging, alarms 17 and 18 which issue alarming sound or alarming light when cutting off the electrification path is detected by the monitor circuit 30. The monitor circuit 30 detects the failure of power source of the cellular phone 8 that is connected as well. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a mobile phone charging device with a security function having various security functions while charging a mobile phone.

  As the types of chargers for mobile phones, there are an AC adapter type for charging from an AC outlet, a USB connection type for charging by connecting to a USB terminal such as a PC, and a battery type charger for charging from a dry battery.

  On the other hand, the following techniques are known for preventing loss or theft of mobile phones. In Patent Document 1, a user of a cellular phone has a separate personal identification oscillator, and the cellular phone is provided with a personal identification number receiving unit that receives a personal identification number transmitted from the personal identification oscillator, and the received personal identification number is predetermined. The abnormality is judged by whether or not it matches the user's personal identification number. In Patent Document 2, a mobile phone (portable object) is attached with a transmitter that transmits radio waves of a certain frequency, and the user of the mobile phone has a receiver that receives radio waves from the transmitter. This is to notify the abnormality when it is not received.

JP-A-7-87559 JP-A-2005-222510

  According to the techniques of Patent Documents 1 and 2, a transmitter or a receiver for detecting an abnormality is provided on the mobile phone side and the user side in order to prevent loss or theft of the mobile phone. Therefore, it is necessary to change the structure of the mobile phone in order to attach the dedicated transceiver, and the practicality is lacking. Further, when the mobile phone is being charged, a charger and a transmitter / receiver are required, and the wiring cord around the mobile phone becomes messy.

  An object of the present invention is to provide a mobile phone charging device with a security function having various security functions while charging without changing the structure of a conventional mobile phone.

  The present invention relates to a mobile phone charging device with a security function that charges a mobile phone and has a security function for the mobile phone, and is connected to the mobile phone and a DC power source that generates a DC voltage for charging to be supplied to the mobile phone. A charging cable that supplies a DC voltage for charging, a monitoring circuit that detects that the energization path during charging is interrupted between the mobile phone, and a monitoring circuit that detects that the energization path is interrupted It is set as the structure provided with the alarm device which emits a warning sound or warning light. The monitoring circuit further detects a power supply abnormality of the connected mobile phone.

  According to the present invention, it is possible to prevent the mobile phone being charged from being stolen or lost. Furthermore, it is possible to detect a power supply abnormality of the mobile phone. At that time, since the security function is built in the charger, it can be used as it is without changing the structure of the mobile phone. In addition, the wiring cord around the mobile phone does not become messy and is excellent in usability.

The figure which shows the 1st Example of the mobile telephone charging device with a security function. FIG. 2 is a detailed structural diagram of the charger 1. The figure which shows the locking mechanism of a connector and a mobile telephone. The figure which shows the setting procedure of a security operation | movement. The figure explaining the list of security functions. The figure which shows the internal circuit structure of the charger. The figure which shows the internal structure of a monitoring circuit. The figure which shows the 2nd Example of the mobile telephone charging device with a security function. FIG. 3 is a diagram illustrating an internal circuit configuration of the charger 10.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a diagram showing a first embodiment of a mobile phone charging device with a security function according to the present invention.
In FIG. 1, 1 is a port type charger, 2 is an AC outlet plug, 3 is an AC adapter, 4 is a USB (Universal Serial Bus) plug, 5 is a USB cable, 6 is a connector, 7 is a connector lock key, and 8 is a connector lock key. It is a mobile phone.

  The AC adapter 3 converts an AC power source (100 to 240 V) into a predetermined DC voltage (for example, 12 V) and supplies it to the charger 1. The charger 1 generates a DC voltage for charging (for example, 5 V) and supplies it to the mobile phone 8 via the USB cable 5 to charge the battery pack in the mobile phone 8. The USB plug 4 is connected to the charger 1, and the connector 6 is connected to the charging terminal of the mobile phone 8. The connector lock key 7 is for mechanically locking the connection between the connector 6 and the mobile phone 8. The charger 1 has a four-port structure, and can connect four mobile phones 8 simultaneously by connecting four USB cables 5.

  The charger 1 of the present embodiment has a security function (monitoring function) that issues an alarm when an abnormality occurs in the charging operation, as will be described later. That is, when the connector 6 is disconnected from the mobile phone 8 or the USB plug 4 is disconnected from the charger 1, an alarm is generated to notify the user when the energization path during charging is interrupted. This can prevent the mobile phone 8 being charged from being stolen or lost. In this embodiment, since the security function is built in the charger 1, it can be used as it is without changing the structure of the mobile phone 8. In addition, the wiring cord around the mobile phone does not become messy and is excellent in usability.

  In this embodiment, the AC power source is used as the power source for charging. However, when charging by connecting to a USB terminal such as a PC, or when charging from a dry battery (battery), the input adapter and voltage specifications are used. If it is changed, it can be handled. Needless to say, the number of ports of the charger 1 can be expanded to any number other than four (for example, eight).

FIG. 2 is a detailed structural diagram of the charger 1.
In FIG. 2, reference numeral 11 denotes an alarm lock key, which starts a security operation (monitoring operation) by removing the lock key 11 after the USB plug 4 is connected. Reference numeral 12 denotes an insertion port of the USB plug 4, and reference numeral 13 denotes a mode changeover switch in a monitoring operation mode (mode A or mode B described later). Reference numeral 14 denotes a translucent cover, which is protected by connecting the USB plug 4 and setting the alarm lock key 11 and the changeover switch 13 and then closing the cover. Reference numeral 15 denotes a cover opening / closing key, and 16 denotes a cable disconnection prevention structure. By providing the cover 14, the open / close key 15, and the cable disconnection prevention structure 16, the USB plug 4 connected to the charger 1 is prevented from being inadvertently disconnected.

  On the upper surface of the charger 1, 17 is an alarm buzzer that emits an alarm sound when abnormal, and 18 is an alarm LED (light emitting diode) that lights (flashes) alarm light (red) when abnormal. Reference numeral 19 denotes a monitoring operation confirmation LED which lights up in blue when the alarm lock key 11 is extracted and the security operation is started. A backup battery 20 is a power supply for performing an alarm operation when the AC outlet plug 2 is removed. Reference numeral 21 denotes a key for issuing an alarm upon detecting that the AC outlet plug 2 has been disconnected. When the key 21 is removed after the AC outlet plug 2 is inserted into the AC power source, the monitoring operation is started.

  If any abnormality occurs during the charging operation, the alarm buzzer 17 and the alarm LED 18 generate an alarm sound and an alarm light. In order to stop the alarm, the alarm lock key 11 or the AC outlet omission alarm key 21 may be inserted.

FIG. 3 is a diagram showing a locking mechanism between the connector and the mobile phone.
When the connector lock key 7 is inserted into the key hole of the connector 6 and the lock key 7 is rotated 90 degrees, the engaging claws between the connector 6 and the mobile phone (not shown) are locked. When the lock key 7 is returned to the original rotation position, the engagement claw lock mechanism is released.

  In this embodiment, the connector lock key 7 is inserted to connect to the charging terminal of the mobile phone in a state where the lock mechanism of the connector 6 is released. Thereafter, the lock key 7 is rotated 90 degrees to be in a locked state, and the lock key 7 is pulled out to perform a charging operation. Thereby, the connection between the connector 6 and the mobile phone 8 is mechanically locked, and the connection between the mobile phone being charged and the connector 6 can be prevented from being inadvertently disconnected.

FIG. 4 is a diagram showing a security operation setting procedure.
First, three keys (connector lock key 7, alarm lock key 11, AC outlet disconnection prevention alarm key 21) are inserted into the respective insertion ports (S101). As a result, the connector 6 can be connected, and an unnecessary alarm is not generated during the setting of the security operation before the start of charging.

  The AC outlet plug 2 is inserted into the AC power source (S102), and the AC outlet disconnection prevention alarm key 21 is pulled out (S103). Thereby, when the AC outlet plug 2 is disconnected from the AC power source, a function for detecting this and starting an alarm is started.

  Next, the connector 6 of the USB cable 5 is connected to the charging terminal of the mobile phone 8 (S104), and after locking with the connector lock key 7, it is pulled out (S105). This prevents the connector 6 from being detached from the mobile phone 8.

  Finally, the USB plug 4 of the USB cable 5 is connected to the USB plug insertion port 12 of the charger 1 (S106). Thereby, the charging operation to the mobile phone 8 is started. Then, the monitoring operation mode is selected by the mode switch 13 (S107). Further, by pulling out the alarm lock key 11 (S108), the monitoring operation confirmation LED 19 is lit in blue and the monitoring operation during charging is started (S109).

  FIG. 5 is a diagram illustrating a list of security functions. The security function in this embodiment has a monitoring mode A and a monitoring mode B, and the user can select them. In either case, the monitoring operation is performed with the alarm lock key 11 extracted.

In the monitoring mode A, when the following states (1) to (6) are detected, the alarm buzzer 17 and the alarm LED 18 emit an alarm sound and an alarm light.
(1) When the connector 6 is removed from the mobile phone 8,
(2) When the USB plug 4 is removed from the charger 1,
(3) When the USB cable 5 is disconnected
(4) When AC outlet 2 is unplugged
(5) When the power of the mobile phone 8 is turned off,
(6) When the battery pack of the mobile phone 8 is removed.

  Among these, (1) to (4) are cases where some of the energization paths are interrupted, and (5) and (6) are cases where an abnormality occurs in the power supply in the mobile phone 8. Thus, in the monitoring mode A, not only the mobile phone being charged can be stolen but also all abnormal states during charging, including detection of power off and detection of battery pack removal, can be detected and an alarm can be issued.

  On the other hand, in the monitoring mode B, only the states (1) to (4) are detected and an alarm sound and an alarm light are emitted. This is used for simple functions limited to the prevention of theft of mobile phones. The user may select the monitoring modes A and B according to the usage state of the mobile phone.

FIG. 6 is a diagram illustrating an internal circuit configuration of the charger 1.
The charger 1 has USB ports (Port-1 to Port-4) of four systems (hereinafter referred to as subscripts a to d), and charging voltage is applied to the mobile phone via the four USB cables 5a to 5d. And the operation of monitoring the energization path is performed. DC power supplies 25a to 25d generate charging voltages Vcc1 to Vcc4 of DC 5.0 to 5.4V. The V-bus DC power supply 26 supplies the mobile phone 8 with a reference voltage DC 5.3V as a V-bus voltage, and is independent of the charging DC power supplies 25a to 25d in order to stabilize the voltage value. . The monitoring circuits 30a to 30d detect an abnormality in each energization path, and when an abnormality occurs, an alarm sound is generated from the alarm buzzer 17 via the alarm buzzer circuit 24, and the corresponding alarm LEDs 18a to 18d are blinked. The AC outlet disconnection monitoring circuit 27 monitors the voltage supply from the AC adapter 3 side, and when the supply is cut off, switches to the backup battery 20 and generates an alarm sound from the alarm buzzer 17. As described above, even when the AC outlet is disconnected, the monitoring circuits 30a to 30d can continue the monitoring operation and issue an alarm by the backup battery 20.

  Between the monitoring circuits 30a to 30d and the mobile phone 8, voltage supply and conductive paths are performed using the four cores (Vcc, V-bus, D +, GND) of the USB cables 5a to 5d and the shield wires (Shell-GND). Detects abnormalities. For abnormality determination, (1) the presence / absence of conduction between the GND terminal and Shell-GND and (2) high / low of the D + signal level are detected.

  Regarding the presence / absence of conduction in (1), the digital GND and the analog GND of the mobile phone are connected to the GND terminal of the USB cable and the Shell-GND, and the conduction is detected by the monitoring circuit. Since the digital GND and the analog GND are conductive in the mobile phone, if the conductive path between the monitoring circuit and the mobile phone is normal, the GND terminal connected to the monitoring circuit and the Shell-GND are conductive (short-circuited). )is doing. If the conductive path is interrupted, such as when the connector is disconnected, the GND terminal and Shell-GND are non-conductive (open).

  Regarding the D + signal level of (2), the level of the data signal D + sent from the mobile phone is determined by the monitoring circuit. If the mobile phone is operating normally, the D + signal is at a high level (about 3V). When the mobile phone is powered off, the battery pack is removed, or the connector is disconnected, such as when the conductive path is interrupted, the low level (0 V) is obtained.

FIG. 7 is a diagram illustrating an internal configuration of the monitoring circuit.
The terminal 31 receives Vcc generated by the DC power supply 25, the terminal 32 is connected to the Shell-GND of the USB cable 5, and the terminal 33 is connected to the data signal D + of the USB cable 5. The mode selector switch 13 selects the signal of the terminal 33 in the mode A and the signal of the terminal 31 in the mode B. The NAND circuit 34 performs a NAND operation on the NOT output of the signal at the terminal 32 and the output of the switch 13. The switch 35 opens when the alarm lock key 11 is inserted, and shorts when the lock key 11 is extracted. When the output of the NAND circuit 34 becomes High, the Vcc voltage from the terminal 31 is applied to the alarm buzzer 17 and the alarm LED 18 to emit an alarm sound and an alarm light.

  The alarm action table 40 shows the relationship between input conditions and alarm actions. When the terminal 32 (Shell-GND) is short-circuited to the GND terminal, the terminal 32 (Shell-GND) is at a low level, and when the terminal 32 is opened, Vcc is applied to a high level. The terminal 33 (D + terminal) is at a high level (about 3V) when the mobile phone is operating normally, and is at a low level (0V) when the operation is abnormal. The NAND circuit 34 determines an alarm operation (O: alarm present, x: alarm absent) shown in the operation table 40 by logical operation of signals at the terminals 32 and 33. In mode B, since the Vcc voltage is forcibly applied as a signal on the terminal 33 side and is set to the high level, the D + signal is not relevant to the determination. When the alarm lock key 11 is extracted, the switch 35 is turned on, and an alarm operation according to the operation table 40 is performed. As a result, the security function shown in FIG. 5 can be realized.

FIG. 8 is a diagram showing a second embodiment of the mobile phone charging device with a security function according to the present invention.
In FIG. 8, 10 is a cable type charger, 3 is an AC adapter, 4 is a USB plug, 5 'is a cable, 6 is a connector, 7 is a connector lock key, and 8 is a mobile phone. In the cable-type charger 10, 11 is an alarm lock key, 17 is an alarm buzzer, 18 is an alarm LED, 19 is a monitoring operation confirmation LED, and 22 is a backup battery replacement notification LED. The same reference numerals are given to the same elements as those in the first embodiment (FIGS. 1, 2, and 3).

  In this embodiment, a single mobile phone 8 is charged using the AC adapter 3, the USB plug 4, and the cable 5 '. A charger 10 is attached to the cable 5 ′, and the charger 10 has a monitoring circuit 30 for executing the security function. When an abnormality is detected, an alarm sound is generated from the alarm buzzer 17, and the alarm LED 18 is turned on. Blink.

  FIG. 9 is a diagram illustrating an internal circuit configuration of the charger 10. In the present embodiment, a charging voltage (DC 5.0 to 5.4 V) is directly generated by the AC adapter 3 and supplied to the charger 10 via the USB plug 4. Therefore, the charger 10 does not require the DC power sources 25 and 26 in the first embodiment (FIG. 6). The monitoring circuit 30 supplies voltage to the mobile phone 8 and detects an abnormality in the conductive path via the cable 5 '. For abnormality determination, the presence / absence of conduction between the GND terminal and the Shell-GND and the D + signal level High / Low are detected. This monitoring operation is the same as in the first embodiment, and a description thereof is omitted. The USB disconnection monitoring circuit 28 monitors the voltage supply from the AC adapter 3 side, and when the supply is interrupted, switches to the backup battery 20 and generates an alarm sound from the alarm buzzer 17. When the voltage of the backup battery 20 decreases, the backup battery replacement notification LED 22 is lit to notify.

The security function in the present embodiment issues an alarm when the next state is detected. Also, the monitoring mode can be switched as in the first embodiment.
(1) When the connector 6 is removed from the mobile phone 8,
(2) When the USB plug 4 is removed from the AC adapter 3,
(3) When cable 5 'is cut
(4) When AC adapter 3 is unplugged
(5) When the power of the mobile phone 8 is turned off,
(6) When the battery pack of the mobile phone 8 is removed.

  The structure shown in each of the embodiments is merely an example, and the configuration may be appropriately changed depending on the form of the power source for charging (AC power source, DC power source) and the number of mobile phones connected. The form of the alarm lock key 11 and the mode changeover switch 13 may be a button switch or a slide switch. The connector lock key 7 and the cover opening / closing key 15 can be shared. Further, the USB cable 5 and the cable 5 'may be other cables as long as they can transmit the monitoring signal.

1,10 ... charger,
2 ... AC outlet plug,
3 ... AC adapter,
4 ... USB plug,
5 (5 ′) USB cable (cable),
6 ... Connector,
7 ... Connector lock key,
8 ... Mobile phone,
11 ... Alarm lock key,
12 ... USB plug socket,
13: Mode switch,
14 ... cover,
15 ... Cover open / close key,
16 ... Cable disconnect prevention structure,
17 ... alarm buzzer,
18 ... alarm LED,
19: Monitoring operation confirmation LED,
20 ... backup battery,
21 ... AC outlet omission alarm key,
22 ... Backup battery replacement notification LED,
24 ... Alarm buzzer circuit,
25 ... DC power supply,
26 ... V-bus DC power supply,
27 ... AC outlet disconnection monitoring circuit,
28 ... USB disconnection monitoring circuit,
30. Monitoring circuit,
31-33 ... terminals,
34 ... NAND circuit,
35 ... switch,
40: Alarm action table.

Claims (5)

In a mobile phone charging device with a security function that charges a mobile phone and has a security function for the mobile phone,
A DC power source for generating a DC voltage for charging to be supplied to the mobile phone;
A charging cable for connecting to the mobile phone and supplying a DC voltage for charging;
A monitoring circuit for detecting that an energization path during charging is interrupted with the mobile phone;
An alarm device that emits an alarm sound or an alarm light when it is detected by the monitoring circuit that the energization path is interrupted;
A mobile phone charging device with a security function, characterized by comprising: The mobile phone charging device with security function according to claim 1,
The mobile phone charging device with a security function, wherein the monitoring circuit further detects a power supply abnormality of the mobile phone connected thereto. The mobile phone charging device with security function according to claim 1,
The mobile phone charging device with a security function, wherein the monitoring circuit detects the interruption of an energization path by detecting the presence or absence of conduction between predetermined terminals of the mobile phone via the charging cable. The mobile phone charging device with security function according to claim 2,
The mobile phone charging device with a security function, wherein the monitoring circuit detects a power supply abnormality of the mobile phone by detecting a voltage value of a predetermined terminal of the mobile phone through the charging cable. The mobile phone charging device with security function according to claim 1,
The connector for connecting the charging cable to the mobile phone has a mechanism for locking the connection state with the mobile phone with a connector lock key.

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