JP2007141094A - Equipment with unauthorized use preventing function - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide equipment with unauthorized use preventing function, which can be used by anyone while preventing unauthorized use by a third person when lending it to a user under a manager's administration. <P>SOLUTION: The equipment 1 to be lent to the user by the manager includes an equipment body 14 which is switchable between an operable available state and an non-operable unavailable state. The equipment 1 comprises a touch electrode 11 disposed so that a human body H can touch it, and a connecting electrode 12 opposed to the human body H and electrically connected with the human body H. When a person wearing a human body-side communication device 2 touches the touch electrode 11, data communication can be performed between the communication device 2 and a communication processing means 13a using the human body H as a transmission line LN. A switching means 13c provided on the equipment 1 performs, in response to instruction from the communication device 2, switching between the available state and the unavailable state of the equipment body 14. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a device with an unauthorized use prevention function that can prevent unauthorized use by limiting users.

  Conventionally, when the identification information such as an ID or a password is set in advance on the device side in order to limit the user of the device, and the identification information is given to the device using an appropriate input means A technique is widely adopted in which the relationship between input identification information and identification information set in advance is collated, and the use of the device is permitted when both satisfy a prescribed relationship.

  The input means for inputting the identification information includes data from a keypad having a plurality of numeric keys and a keyboard having alphanumeric keys for inputting the identification information, or a magnetic card or IC card in which the identification information is registered in advance. Card readers that read are known.

  By the way, since this type of input means occupies a relatively large space, a device equipped with this type of input means in advance, such as a computer, a mobile phone, a cash dispenser, a password-type electronic lock, etc. Then, it can be used easily. However, in normal use, in a general electric device that does not need to provide this type of input means, the provision of the input means causes a problem that the appearance is impaired.

As a technique for enabling the input of identification information without providing this type of input means, communication provided on the human body side communication device worn on the user's body and in electrical equipment (for example, a mobile phone or a portable information terminal) There has been proposed a method for collating identification information by performing data communication using a human body as a transmission path with a processing unit (see, for example, Patent Document 1). In the technique described in Patent Document 1, data communication is performed by a user touching an electrode provided in an electric device. With such a configuration, even if the mobile phone is lost or stolen, there is no fear of being used illegally, and the purpose of giving the user a sense of security can be achieved.
JP 2001-308803 A (paragraphs 0041-0042)

  By the way, in the technique described in Patent Document 1 described above, it is possible to prevent unauthorized use of an electric device without providing a large input means, but a user wearing the human body side communication device on the body. Without it, electrical equipment cannot be used. For example, although a mobile phone is not used even if it is passed to another person, there is a disadvantage that it is not possible to make a call with another person during the call.

  The present invention has been made in view of the above-mentioned reasons, and its purpose is to provide a usable state that can be operated by the administrator and a prohibited state that cannot be operated by the administrator when lending to the user under the management of the administrator. The device with an unauthorized use prevention function that can be used by anyone without wearing a human body side communication device in the usable state while preventing unauthorized use by a third party as a prohibited state. Is to provide.

  The invention of claim 1 is a device that can be switched between a usable state that can be operated and loaned to a user from an administrator, and a touch electrode that is arranged so that a human body can touch it, Communication processing means for performing data communication using the human body as a transmission path with the human body side communication device when the human body side communication device is attached to the human body contacting the touch electrode, and the human body side communication device and the communication processing means When the first identification information set in the human body side communication device and the second identification information set in the communication processing means are in a prescribed relationship when data communication is performed with It is characterized by comprising determination means for receiving an instruction from the communication device, and switching means for switching between the usable state and the prohibited state in response to the instruction from the human body side communication device.

  According to this configuration, it is possible to switch between the usable state and the prohibited state in response to an instruction from the human body side communication device, so if it is set to the usable state, it can be lent to others and used by others. Is possible. In other words, it can be used by another person who is not wearing the human body side communication device under the management of the administrator. On the other hand, if the prohibited use state is set, unauthorized use by a third party can be prevented. That is, unauthorized use due to theft from a storage location can be suppressed while allowing use by others. Also, the administrator wearing the human body side communication device can switch between the usable state and the prohibited state simply by touching the touch electrode. For example, the device stored in the warehouse is lent to the user. At the time of handing, it can be set to a usable state by simply touching the touch electrode, and when collecting the device, it can be set to a prohibited state by simply touching the touch electrode. Unauthorized use can be prevented. If a technology that involves some work is adopted to switch between the usable state and the prohibited state, it will take a lot of time to handle a large number of devices. It is possible to switch between the usable state and the prohibited state simply by handing without any special work. Moreover, since a large number of devices can be handled by one human body side communication device, an increase in cost can be suppressed.

  According to a second aspect of the present invention, in the first aspect of the invention, the switching means switches between the human body side communication apparatus and the communication processing means after switching to the usable state in response to an instruction from the human body side communication apparatus. When the usage limit specified by the data communication between them is reached, it is switched to the prohibited use state.

  According to this configuration, since the use limit is limited even after setting to the usable state, it is automatically set to the prohibited use state when the use limit is reached, and unauthorized use of the device is more reliably ensured. Can be prevented. For example, when lending equipment such as power tools to users such as construction workers and returning and storing them after use, only the user wearing the human body side communication device as in the conventional configuration uses the equipment. If it is possible to prevent unauthorized use by a third party, it may not be possible for the user to take it home and use it for any purpose other than construction work. According to the configuration, even if a third party tries to use or the user himself / herself takes it home, it cannot be used when the usage limit is reached, so that it is easy to prevent unauthorized use. If the usage limit is set to be slightly higher than the daily work volume, it will prevent the use limit from being reached due to the use limit being reached during the day's work, while others will continue to use it. It can be surely prevented.

  In the invention of claim 3, in the invention of claim 2, the use limit is a stop time transferred from the human body side communication device to the switching means, and the switching means has a clock unit for measuring the current time. In addition, when the time counted by the clock unit after switching to the usable state becomes the stop time, the state is switched to the prohibited state.

  According to this configuration, if the end time of use of the device is set to the stop time, the device cannot be used after the stop time. Unless it happens, it is possible to prevent unauthorized use of the device by a third party, and even if it is in the hands of a third party, the device cannot be used at the stop time. I can expect.

  According to a fourth aspect of the present invention, in the second aspect of the present invention, the use limit is a time limit transferred from the human body side communication device to the switching unit, and the switching unit includes a timer unit that limits the time limit. And switching to the prohibited use state when the time limit elapses after switching to the usable state.

  According to this configuration, if the time for using the device is set to the time limit, the device cannot be used after the time limit elapses, so the user lends it to a third party before the time limit elapses. As long as the device is not stolen or stolen, unauthorized use of the device by a third party can be prevented, and if it reaches the time limit even if it is in the hands of a third party, the device cannot be used. Can also be expected.

  In the invention of claim 5, in the invention of claim 2, the use limit is a limited number of transfers from the human body side communication device to the switching means, and the switching means counts the number of operations. And after switching to the usable state, when the number of times counted by the counter unit reaches the limit number, the state is switched to the prohibited state.

  According to this configuration, if the number of times that the device is expected to be used is set to the limit number, the user cannot use the device after using the limit number of times. As long as the device is not lent or stolen, the device can be prevented from being used illegally by a third party. The effect of deterring unauthorized use can also be expected.

  According to a sixth aspect of the present invention, in the invention according to any one of the second to fifth aspects, the human body side communication device uses rewritable nonvolatile storage means for storing the use limit and a human body for a transmission line. Rewriting means for rewriting the contents of the storage means by performing data communication with an external device, and writing for transferring the contents of the storage means to the switching means when performing data communication with the communication processing means Means.

  According to this configuration, it is possible to rewrite the use limit by an external device to the storage means provided in the human body side communication device, and further transfer the use limit from the human body side communication device to the switching means. Therefore, the use limit set by the external device can be written to the switching means via the human body side communication device. As described above, since the use limit set in the switching means can be changed, the use limit can be arbitrarily set and used conveniently.

  According to a seventh aspect of the present invention, in any one of the first to sixth aspects, the touch electrode is a single electrode, and the communication processing means is not in contact with the human body and is electrostatically connected to the human body. The coupling electrode to be coupled is connected together with the touch electrode, and a transmission path including the human body side communication device and the human body is formed between the touch electrode and the coupling electrode.

  According to this configuration, since the touch electrode is monopolar, data can be transmitted by touching the touch electrode with a fingertip.

  According to an eighth aspect of the present invention, in any one of the first to sixth aspects, the touch electrode has two poles, both touch electrodes are connected to the communication processing means, and the touch electrode is interposed between the two touch electrodes. A transmission path including the human body side communication device and the human body is formed.

  According to this configuration, since two touch electrodes are provided, there is no portion due to electrostatic coupling in the transmission path by touching both touch electrodes, and the transmission impedance can be reduced and data can be transmitted with a small amount of power. it can.

  According to a ninth aspect of the present invention, in any one of the first to eighth aspects of the present invention, a lock switch for manually switching from the usable state to the prohibited state is provided separately from the switching means.

  According to this configuration, since the lock switch is manually switched to the prohibited state, even when the human body side communication device is not worn on the body, the lock switch can be switched to the prohibited state by operating the lock switch. It becomes easy to control unauthorized use.

  The invention of claim 10 is characterized in that, in the invention of claim 9, the lock switch is also used as a power switch, and is switched to a prohibited use state when the power is shut off.

  According to this configuration, once the power is turned off, it will be in a prohibited state, so after the user has finished using it, it will be in a prohibited state when the power is turned off. Unauthorized use by others can be prevented.

  According to the configuration of the present invention, there is an advantage that unauthorized use due to theft from a storage location can be suppressed while allowing use by others. For example, when lending equipment stored in a warehouse to a user, it can be set to a usable state by simply touching the touch electrode when handing it over, and when collecting the equipment, the touch electrode can be set. It is possible to prevent unauthorized use by a third party by setting the prohibited use state simply by touching, and there is an advantage that the work performed at the time of lending and returning the device can be easily performed.

(Embodiment 1)
In the present embodiment, a portable device such as an electric tool is assumed as the device. As shown in FIG. 1B, the device 1 is configured to be able to perform data communication using the human body H as the transmission line LN with the human body side communication device 2 worn on the human body. The human body side communication device 2 has a container body 20 attached to an arm, and two contact electrodes 21 arranged on the surface of the container body 20 facing the human body H so as to be separated from each other in the length direction of the arm. , 22 are provided. A monopolar touch electrode 11 is exposed on the outer surface of the housing 10 of the device 1, and a coupling electrode 12 that is electrostatically coupled to the human body H by being opposed to the human body H touching the touch electrode 11 with a fingertip is provided. . In the figure, the capacitor symbol represents electrostatic coupling. The coupling electrode 12 can be incorporated in the housing 10 if the housing 10 is an insulating material, and can be exposed to the outside of the housing 10 without being limited to the material of the housing 10. As shown in FIG. 1B, when the fingertip touches the touch electrode 11, a transmission line LN passing through the arm is formed between the touch electrode 11 and the contact electrode 21, and the contact electrode 22, the coupling electrode 12, A transmission line LN passing through the human body H and passing through the space of the part that is electrostatically coupled is formed. Therefore, data communication using the transmission line LN described above is possible between the human body side communication device 2 and the device 1.

  The human body side communication device 2 has a body 20 that is attached to the human body H by a belt or the like that wraps around an arm, and is arranged so as to face the human body H (arm) in the body 20 as shown in FIG. Two contact electrodes 21 and 22 are provided. The contact electrodes 21 and 22 are arranged so as to be aligned in the arm length direction. The human body side communication device 2 uses a battery (not shown) as a power source, and a control unit 23 composed of a CPU reads data stored in a storage unit (storage unit) 24 to generate transmission data, and receives reception data in the storage unit 24. Store. The storage unit 24 also stores identification information (first identification information). The storage unit 24 is a rewritable nonvolatile memory such as an EEPROM.

  The transmission data generated by the control unit 23 is modulated by the modulation unit 25 and then converted to a voltage necessary for data transmission through the voltage application unit 26, and the output voltage of the voltage application unit 26 is applied to the contact electrodes 21 and 22. Is done. When a voltage is applied to the contact electrodes 21 and 22, transmission data can be transmitted to the device 1 as a transmission signal through a path LN passing through the human body H as a transmission signal. As a modulation method in the modulation unit 25, for example, an FSK method is adopted.

  On the other hand, when a voltage is applied to the contact electrodes 21 and 22 through the human body, the voltage applied to the contact electrodes 21 and 22 is detected as a reception signal by the voltage detection unit 27, and the reception signal is demodulated by the demodulation unit 28. The received data is extracted by The extracted received data is delivered to the control unit 23, and the control unit 23 performs a predetermined operation according to the content of the received data.

  The period in which the voltage application unit 26 applies a voltage to the contact electrodes 21 and 22 is different from the period in which the voltage detection unit 27 detects a voltage applied to the contact electrodes 21 and 22. Thus, the voltage applied to the contact electrodes 21 and 22 is not directly detected by the voltage detector 27.

  The control unit 23 provided in the human body side communication device 2 normally operates in a standby mode in which a voltage is applied to the contact electrodes 21 and 22 intermittently by the voltage application unit 26. In the standby mode, a transmission line LN passing through the human body H is formed when a person touches the touch electrode 11 provided in the device 1, and there is a response from the device 1 to the voltage applied to the contact electrodes 21 and 22 in the standby mode. When the voltage detection unit 27 detects this, the standby mode is switched to the communication mode, and communication with the device 1 is started.

  By the way, as shown to Fig.1 (a), the apparatus 1 has the circuit structure similar to the human body side communication apparatus 2, and is provided with the apparatus side control part 13 which consists of CPU. The transmission data generated by the device-side control unit 13 is modulated by the modulation unit 15 and then converted into a voltage necessary for data transmission through the voltage application unit 16, and the output voltage of the voltage application unit 16 is coupled to the touch electrode 11. It is applied between the electrodes 12.

  On the other hand, when a person touches the touch electrode 11 and the human body H faces the coupling electrode 12, the transmission line LN passing through the human body H is formed between the device 1 and the human body side communication device 2. And the voltage applied between the coupling electrode 12 are detected by the voltage detector 17. The voltage detector 17 detects a voltage applied between the touch electrode 11 and the coupling electrode 12 as a received signal, and the received signal is extracted by demodulating the received signal by the demodulator 18. The received data is delivered to the device side control unit 13.

  By the way, the apparatus side control part 13 is provided with the communication processing means 13a which performs data communication between the human body side communication apparatuses 2. FIG. Identification information (second identification information) is set in the communication processing means 13a, and when the identification information (first identification information) set in the human body side communication device 2 is received, both identification information is determined. It is handed over to the means 13b, and it is determined whether or not the specified relationship is established between both pieces of identification information. The determination means 13b accepts an instruction transmitted from the human body side communication device 2 when a prescribed relationship is established between both pieces of identification information.

  The instruction content transmitted from the human body side communication device 2 includes a usable state in which the device main body 14 in the device 1 can be operated and a prohibited use state in which the device main body 14 cannot be operated. The setting contents are also instructed. Details of these instructions will be described later. In addition, the prescribed relationship between the identification information may simply match, but the result of applying an appropriate conversion rule to both identification information and applying the conversion rule may match. The device-side control unit 13 is also provided with a switching unit 13c that switches the device main body 14 between the usable state and the prohibited state according to the determination result by the determination unit 13b. The device main body 14 means a part having a substantial function as the device 1.

  The device-side control unit 13 operates in a reception mode in which a voltage applied between the touch electrode 11 and the coupling electrode 12 is monitored by the voltage detection unit 17 when the power is turned on, and transmission from the human body side communication device 2 in the reception mode. When the signal is received, the response signal is returned to the human body side communication device 2 in response to the transmission signal and the communication mode is entered. When the response signal is received, the human body side communication device 2 shifts from the standby mode to the communication mode, and data communication between the device 1 and the human body side communication device 2 becomes possible.

  In the communication mode, data stored in the storage unit 24 of the human body side communication device 2 is transmitted to the device 1 using the human body H as the transmission path LN. In the switching means 13c provided in the device 1, if the data transmitted from the human body side communication device 2 indicates the usable state, the device main body 14 can be operated, and if the prohibited state is instructed, the device The main body 14 is disabled.

  Here, for enabling and disabling the operation of the device main body 14, a technique for cutting off the power supply to the device main body 14 is used. However, in the case where the device main body 14 is a device controlled using a control circuit such as a microcomputer, the control circuit instructs the control circuit to disable operation or instructs the operation unit provided in the device 1 to operate. It is also possible to adopt a technique for instructing not to accept.

  A usage example of the above-described apparatus will be described. Data indicating the usable state transmitted from the human body side communication device 2 is “RELEASE”, and data indicating the prohibited state is “LOCK”. In addition, it is assumed that the storage unit 24 of the human body side communication device 2 stores one data of “RELEASE” and “LOCK”.

  Now, when a person wearing the human body side communication device 2 whose data is “LOCK” touches the touch electrode 11 provided on the device 1, a voltage is applied between the touch electrode 11 and the coupling electrode 12, and the device side control is performed. The unit 13 returns a response signal to the human body side communication device 2 and shifts to the communication mode. By receiving the response signal, the human body side communication device 2 determines that the link has been established with the device side control unit 13 and transmits the data “LOCK” read from the storage unit 24 to the device side control unit 13. To do. When receiving the data “LOCK”, the device-side control unit 13 disables the device main body 14 and prohibits the use of the device 1 thereafter. Similarly, when a person wearing the human body side communication device 2 whose data is “RELEASE” touches the touch electrode 11 provided on the device 1, the device body 14 can be operated, and thereafter the device 1 can be used. become.

  As described above, since the human body side communication device 2 whose data is “RELEASE” sets the device 1 in the usable state, it is managed so that only the administrator who manages the device 1 uses the device 1. Do not let the user of use. That is, the device 1 can be switched to the usable state only by the administrator. Note that it is not always necessary for the administrator to use the human body side communication device 2 whose data is “LOCK”. Moreover, although the human body side communication apparatus 2 is provided for every kind of data, several types of data are stored in the memory | storage part 24 of one human body side communication apparatus 2, and it transfers to the apparatus 1 with a switch to illustration. The type of data to be selected may be selected.

  By the way, the human body side communication device 2 is indispensable to switch the device 1 to the usable state, but the operation to switch to the prohibited state may not necessarily use the human body side communication device 2. That is, a lock switch 13d for manually switching from the usable state to the prohibited state may be provided separately from the switching unit 13c. Once the lock switch 13d is operated, the device 1 is switched to the prohibited use state. Therefore, the human body side communication device 2 is used to switch back to the usable state.

  The mode of the operation unit of the lock switch 13d may be any, but it is desirable to set the position and shape so that the device 1 is not inadvertently operated during use. For example, a push button type operation unit is provided in the recess so as not to be touched when the device 1 is used. The lock switch 13d may also be used as a power switch. That is, a power switch may be provided separately from the switch for operating and stopping the device 1 so that the device 1 can be switched to the prohibited use state when the power switch is turned off.

  Even when the lock switch 13d is provided, it is desirable to enable the function of switching to the prohibited use state using the human body side communication device 2, and the operation of the lock switch 13d is left to the user so that the user can If the user forgets to operate 13d, the administrator may switch to the prohibited use state using the human body side communication device 2.

(Embodiment 2)
In the first embodiment, the device 1 is loaned to the user in the usable state. Therefore, if the user does not manage the device 1, it may be used by a third party in the usable state. Therefore, in order to reduce the possibility of using the device 1 by a third party, it is desirable to set a use limit for the device 1 switched to the usable state. In the present embodiment, an example in which a use limit is set for the device 1 from the human body side communication device 2 by data communication between the human body side communication device 2 and the communication processing unit 13a will be described. In other words, the device 1 for which the use limit is set is switched to the prohibited use state when the use limit is reached, and even if a third party uses the device 1, it cannot be used when the use limit is reached. The unauthorized use of 1 is suppressed.

  The use limit is specified by at least one of the time for switching to the prohibited use state, the time for measuring the usable state, and the number of times the device 1 is operated in the usable state.

  When the use limit is designated by time, a clock unit (not shown) for measuring the current time is provided in the switching unit 13c, and the stop time is transferred in advance from the human body side communication device 2 to the switching unit 13c. Keep it. In this configuration, the switching unit 13c automatically switches to the prohibited use state when the time counted by the clock unit becomes the stop time. Therefore, if the device 1 is lent out at the work site at the start of work, and the time for collecting the device 1 is set as the stop time at this time, the device 1 is automatically disabled when the device 1 is collected. It becomes impossible. In this example, the case where only the stop time is set is illustrated, but the start time at which the device 1 can be operated may be set together with the stop time. When the start time is set, by limiting the period during which the device 1 can be used from the start time to the stop time, unauthorized use can be further suppressed than when only the stop time is set. .

  When the use limit is designated by time, a timer unit (not shown) for time limit is provided in the switching unit 13c, and the human body side communication device 2 transfers the time limit to the switching unit 13c in advance. deep. In this configuration, the switching means 13c automatically switches to the prohibited use state when the time limit limited by the timer unit has elapsed after switching to the usable state. Therefore, the device 1 can use only the time specified by the time limit, and can suppress unauthorized use.

  When the usage limit is limited by the number of times of driving, a counter unit (not shown) for counting the number of times of driving is provided in the switching means 13c, and the human body side communication device 2 limits the switching means 13c in advance. Transfer the number of times. In this configuration, the switching unit 13c counts the number of times the device 1 has been operated after switching to the usable state, and automatically switches to the prohibited use state when the counted number reaches the limit number. For example, in the case of an electric driver, the number of operations is one operation from turning on the operation switch to turning it off to tighten one screw. Therefore, if the number of operations according to the schedule of the day is set at the work site, unnecessary use of the device 1 is limited, and unauthorized use can be suppressed.

  By the way, in the present embodiment, it is necessary to set at least one type of use limit of the stop time, the start time, the time limit, and the limit number in the switching unit 13c. Although it is possible to set the usage limit in the switching unit 13c in advance, it is more convenient to set the usage limit arbitrarily for the device 1. Therefore, as shown in FIG. 3, it is desirable to provide the external device 3 so that the contents of the storage unit 24 built in the human body side communication device 2 can be rewritten.

  The external device 3 includes an information device 3a such as a personal computer or a PDA (Personal Digital Assistant), and an interface device 3b including a touch electrode 31 for a person to touch and a coupling electrode 32 facing the human body H. As shown in FIG. 4, the interface device 3b includes a container 30 that is separate from the information device 3a, and includes a connection unit 34 for connecting the information device 3a. Data can be transferred between the interface device 3b and the information device 3a via the connection unit 34.

  The interface device 3 b has the same configuration as that of the device 1, and transmission through the human body H between the touch electrode 31 and the coupling electrode 32 when a person wearing the human body side communication device 2 touches the touch electrode 31. A path LN is formed, and data communication is performed with the human body side communication device 2. That is, the interface device 3b is provided with a control unit 33, a modulation unit 35, a voltage application unit 36, a voltage detection unit 37, and a demodulation unit 38 that are constituted by a CPU. The transmission data generated by the control unit 33 is modulated by the modulation unit 35 and then applied between the touch electrode 31 and the coupling electrode 32 through the voltage application unit 36.

  On the other hand, while the person touches the touch electrode 31 and the human body H faces the coupling electrode 32, the transmission path LN passing through the human body H is formed between the device 1 and the human body side communication device 2. A voltage applied between the touch electrode 31 and the coupling electrode 32 is detected by the voltage detection unit 37. The voltage detection unit 37 detects the voltage applied between the touch electrode 31 and the coupling electrode 32 as a reception signal, and the reception signal is extracted by demodulating the reception signal by the demodulation unit 38. The received data is delivered to the control unit 33.

  By using the external device 3 configured as described above, the person wearing the human body side communication device 2 can touch the touch electrode 31 to rewrite the contents of the storage unit 24 provided in the human body side communication device 2. Is possible. That is, the control unit 23 provided in the human body side communication device 2 functions as a rewriting unit that rewrites the contents of the storage unit 24 when the human body side communication device 2 performs data communication with the external device 3. Further, when a person wearing the human body side communication device 2 touches the touch electrode 11 of the device 1, the data stored in the storage unit 24 is transmitted to the device 1 as an instruction to the switching means 13c. In addition to the data “LOCK” for instructing the use state and “RELEASE” for instructing the usable state, the data on the various use limits described above are written in the storage unit 24 using the external device 3, so that the human body side Various instructions can be given from the communication device 2 to the device 1. That is, the control unit 23 functions as a writing unit that transfers the contents of the storage unit 23 to the switching unit 13c when performing data communication with the communication processing unit 13a.

  Data setting of the external device 3 is performed using the information device 3a, and data transfer from the external device 3 to the storage unit 24 of the human body side communication device 2 only needs to touch the touch electrode 31 of the interface device 3b. In the human body side communication device 2, the data transfer operation is extremely simple while the data transferred to the device 1 can be freely rewritten. In this way, since various instructions can be given to the device 1 by rewriting the contents of the storage unit 24 using one human body side communication device 2, the human body side communication device 1 is provided for each instruction content. There is no need.

  When data is transferred from the interface device 3b to the human body side communication device 2 or when data is transferred from the human body side communication device 2 to the device 1, an appropriate indicator lamp is used to indicate that the data transfer has been completed. It is desirable to light up. Various existing information devices 3a can be used by providing the interface device 3b separately from the information device 3a. However, a dedicated external device can be provided by incorporating the function of the interface device 3b in the information device 3a. 3 may be configured.

(Embodiment 3)
In each of the above-described embodiments, the device 1 uses the touch electrode 11 and the coupling electrode 12 to form the transmission line LN by electrostatic coupling between the coupling electrode 12 and the human body H. That is, although the monopolar touch electrode 11 is provided in the device 1, this embodiment shows an example in which the bipolar electrode touch electrodes 11a and 11b are provided in the device 1 as shown in FIG.

  In the configuration of the present embodiment, the person wearing the human body side communication device 2 touches each of the touch electrodes 11a and 11b with one hand as shown in FIG. That is, the device 1 is held with both hands. In this state, a transmission line LN having a path passing through both hands is formed between the human body side communication apparatus 1 and the device 2, and the transmission line LN passing through the human body H is used as in the above-described embodiments. And data communication between the human body side communication device 2 are possible. Further, in this configuration, since the coupling electrode 12 is not necessary for the device 1, the device 1 can be downsized. That is, when forming the transmission line LN by electrostatic coupling using the coupling electrode 12, it is necessary to increase the area of the coupling electrode 12 in order to reduce the impedance of the transmission line LN. However, in this embodiment, since the two touch electrodes 11a and 11b are used and the coupling electrode 12 is unnecessary, the apparatus 1 can be downsized accordingly.

  In the external device 3 (interface device 3b), two touch electrodes may be provided instead of the touch electrode 11 and the coupling electrode 12. Other configurations and operations are the same as those of the above-described embodiments.

(A) is a block diagram which shows the apparatus used for Embodiment 1, (b) is a figure which shows the use condition same as the above. It is a block diagram which shows the human body side communication apparatus used for the same as the above. FIG. 10 is a diagram illustrating an example of using an external device in a second embodiment. It is a block diagram which shows the interface apparatus same as the above. It is a block diagram which shows the apparatus used for Embodiment 3. It is a figure which shows a use condition same as the above.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Apparatus 2 Human body side communication apparatus 11 Touch electrode 11a, 11b Touch electrode 12 Coupling electrode 13a Communication processing means 13b Determination means 13c Switching means 13d Lock switch 23 Control part (rewriting means, writing means)
24 storage unit (storage means)
H Human body LN Transmission path

Claims (10)

  It is a device that can be switched between a usable state that can be operated and loaned to the user from the administrator, and a touch electrode that is arranged so that the human body can touch, and a human body that touches the touch electrode Communication processing means for performing data communication with the human body side communication device using the human body as a transmission path when the human body side communication device is mounted, and data communication between the human body side communication device and the communication processing means. An instruction from the human body side communication device is accepted when the first identification information set in the human body side communication device and the second identification information set in the communication processing means when specified are in a defined relationship An apparatus with an unauthorized use prevention function, comprising: a determination unit; and a switching unit that switches between a usable state and a prohibited state in response to an instruction from the human body side communication device.   The switching means switches to the usable state in response to an instruction from the human body side communication device, and then reaches a use limit specified by data communication between the human body side communication device and the communication processing means. 2. The device with an unauthorized use prevention function according to claim 1, wherein the device is switched to a prohibited use state.   The use limit is a stop time transferred from the human body side communication device to the switching unit, and the switching unit includes a clock unit that counts the current time, and clocks the clock unit after switching to the usable state. 3. The device with an unauthorized use prevention function according to claim 2, wherein the device is switched to a prohibited use state when the time when the operation is stopped.   The use limit is a time limit transferred from the human body side communication device to the switching unit, and the switching unit includes a timer unit that limits the time limit, and the time limit elapses after switching to the usable state. 3. A device with an unauthorized use prevention function according to claim 2, wherein the device is switched to a prohibited use state.   The use limit is a limit number of transfers from the human body side communication device to the switching unit, and the switching unit includes a counter unit that counts the number of times of operation, and the counter unit after switching to the usable state 3. The device with an unauthorized use prevention function according to claim 2, wherein when the number of times counted in (1) reaches a limit number, the state is switched to a prohibited use state.   The human body side communication device includes a rewritable nonvolatile storage means for storing the use limit, and a rewrite means for rewriting the contents of the storage means by performing data communication with an external device using the human body as a transmission path. And a writing means for transferring the contents of the storage means to the switching means when performing data communication with the communication processing means. Equipment with unauthorized use prevention function described in 1.   The touch electrode is monopolar, and the communication processing means is connected with a touch electrode that is non-contact with the human body and is electrostatically coupled to the human body, and the touch electrode is connected between the touch electrode and the bond electrode. The apparatus with an unauthorized use preventing function according to any one of claims 1 to 6, wherein a transmission path including a human body side communication device and a human body is formed.   The touch electrode has two poles, both touch electrodes are connected to the communication processing means, and a transmission path including the human body side communication device and the human body is formed between the touch electrodes. The device with an unauthorized use prevention function according to any one of claims 1 to 6.   The device with an unauthorized use prevention function according to any one of claims 1 to 8, further comprising a lock switch that is switched manually from a usable state to a prohibited state separately from the switching unit. The device with an unauthorized use prevention function according to claim 9, wherein the lock switch is also used as a power switch and switches to a prohibited use state when the power is cut off.

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