JP5293458B2 - Connector, signal cable with connector and device connection structure - Google Patents

Description

  The present invention relates to a connector for connecting an electric device to a signal cable, a signal cable with a connector to which the connector is connected, and a device connection structure for connecting the electric device to the signal cable using the connector.

  A vehicle is equipped with a large number of electrical components (electrical devices) such as motors or actuators, and control signals are transmitted and received between the electrical components and control devices such as an ECU (Electronic Control Unit) via a signal cable. ing. The plurality of electrical components and the control device are each connected to one signal cable such as a wire harness, and communicate by sharing this signal cable.

  In the vehicle manufacturing process, in order to facilitate the connection work between the signal cable and the electrical component, the signal cable is provided with a plurality of connectors for connecting the electrical component in advance. The connector is connected and fixed to the signal cable by means such as pressure welding or welding, and a connection terminal for connecting an electrical component is provided. The electrical component is provided with a connection terminal for connection with the connector. Thereby, it is only necessary to connect the connection terminal of the electrical component to the connector of the signal cable in the vehicle manufacturing process.

  Also, in recent years, devices incorporating a communication IC (Integrated Circuit) for performing communication processing in each connector of a signal cable have been put into practical use. The communication IC mounted on the connector communicates with the control device, outputs a control signal to the electrical component based on the data received from the control device, and outputs the output signal of the electrical component to the control device as data. Send. By using a connector with a built-in communication IC, the electrical component connected to the connector does not need to be equipped with a communication function, so that the electrical component can be reduced in price and generalized.

  In Patent Document 1, when the male terminal of the device-side connector is inserted and removed, the communication control IC lead is not burdened, and the communication control IC can be incorporated at the final stage of the connector assembly process. Built-in connectors have been proposed. In this communication control IC built-in connector, the device-side lead of the communication control IC and the male terminal of the device-side connector are connected by a bidirectional female connection terminal in which insertion portions of the both are alternately provided. In addition, a plurality of electric wires of the bus wiring circuit are arranged in a direction intersecting with a plurality of leads on the bus wiring side of the communication control IC, and the leads and electric wires to be connected are connected via a cross connector at the intersection of both. Connecting. The cross connector has a press contact terminal for press-connecting the bus wiring side lead on one end side, and a press contact terminal for press-connecting the electric wire on the other end side.

  Moreover, in the connector with a built-in communication control IC described in Patent Document 1, a plurality of connectors with a built-in communication control IC connected to a wire by a connection pattern using a cross connector of a plurality of leads of the communication control IC and a wire crossing the lead. The address is determined. As a result, a large number of the same communication control ICs can be produced, assembled without distinction, and addresses can be assigned only by changing the connection pattern by the cross connector, so that the cost of the communication control IC can be reduced. There are advantages.

JP 2006-286596 A

  However, the communication control IC built-in connector described in Patent Document 1 must appropriately set the connection pattern of the cross connector in order to determine the address. For this reason, in the manufacturing process in which the lead of the communication control IC and the electric wire are connected by the cross connector, the working time is increased, and the address setting is not appropriately performed due to the incorrect connection, which may cause a failure. .

  The present invention has been made in view of such circumstances, and an object of the present invention is to address each connector in a configuration in which a plurality of connectors with built-in communication functions are connected to a signal cable for communication. An object of the present invention is to provide a connector, a signal cable with a connector, and a device connection structure that can be easily and reliably set.

  The connector according to the present invention is connected and fixed to a signal cable, and is provided with a connection terminal for connecting an electric device, and the electric device connected to the connection terminal is connected to the signal cable. A communication unit that performs communication processing with the device, and an identification information determination unit that determines identification information when the communication unit performs communication according to the shape of a part of the electrical device connected to the connection terminal. It is characterized by providing.

  The connector according to the present invention includes a plurality of switches, and the identification information determining means determines the identification information according to a combination of switches connected / cut off at a part of the electrical equipment. It is characterized by.

  Further, the connector according to the present invention determines whether or not the storage means for storing the preset identification information matches the identification information stored in the storage means and the identification information determined by the identification information determination means. And a misconnection notification unit for notifying when the determination unit determines that the identification information does not match.

  Moreover, the signal cable with a connector according to the present invention is characterized in that any one of the above-mentioned connectors is connected and fixed.

  The device connection structure according to the present invention includes a signal cable with a connector to which a plurality of connectors having connection terminals are connected and fixed, and the device connection structure for connecting an electric device to each connection terminal of the connector, In accordance with the shape of a part of the electrical device connected to the connection terminal, and a communication unit that performs communication processing between the electrical device connected to the connection terminal and the other device connected to the signal cable, It has an identification information determination means for determining identification information when the communication unit performs communication.

  Further, in the device connection structure according to the present invention, the connector has a plurality of switches, and the electric device has one or a plurality of protrusions for switching connection / disconnection of the switches, and identification information of the connector The determining means determines the identification information according to a combination of switches connected / cut off at the protrusion of the electric device.

  In the device connection structure according to the present invention, the connector matches the storage means for storing preset identification information, the identification information stored in the storage means, and the identification information determined by the identification information determination means. Determination means for determining whether or not to perform identification, and erroneous connection notification means for performing notification when the identification information determines that the identification information does not match. The inspection device connected to the signal cable is notified.

In the present invention, the communication unit is provided in the connector fixedly connected to the signal cable, and the communication unit performs communication between the communication unit of the other connector or the control device and the like, and is connected via the connection terminal of the connector. Input / output signals to / from electrical equipment (electrical components) such as motors or actuators. The connector is provided with means for determining identification information such as an address according to the shape of a part of the electrical device connected to the connection terminal.
A plurality of electrical devices connected to a plurality of connectors provided on a signal cable often have different functions or performances, and are often individually designed and manufactured. For this reason, each electric device can be provided with a shape (for example, unevenness or pin) according to the identification information in a part thereof.
The connector detects the shape of the electrical device connected to the connection terminal to determine identification information, and the communication unit communicates with other connectors or control devices using the determined identification information. Since the identification information is determined simply by connecting the electrical device to the connector in the manufacturing process etc., there is no need to set the identification information, the manufacturing process can be shortened, and the identification information is set incorrectly. There is no fear.

  In the present invention, each connector is provided with a plurality of switches, and an electrical device connected to the connection terminal is configured to connect / cut off one or more switches of the connector according to the shape of a part thereof. By setting a part of the shape so that the switch to be connected / cut off for each electric device is different, the connector can determine the identification information according to the combination of the connection / cutoff of each switch. For example, one or a plurality of protrusions for operating the switch may be provided in the electric device, and when the connection is made to the connection terminal of the connector, the protrusion may connect / cut off the corresponding switch.

  In the present invention, each connector may store identification information in advance. In this configuration, the connector determines whether the identification information stored in advance matches the identification information determined according to the shape of the electrical device connected to the connection terminal. Thereby, in the inspection process after manufacture, for example, the inspection device connected to the signal cable and each connector communicate with each other, and it is possible to notify the mismatch between the identification information. Therefore, it is possible to easily and reliably detect an erroneous connection of the electrical device to each connector.

  In the case of the present invention, the communication unit is provided in the connector connected and fixed to the signal cable, and the connector is provided with means for determining the identification information according to the shape of the electrical device connected to the connection terminal of the connector. Thus, the identification information is determined only by connecting the electrical device to the connector, and the communication unit of the connector can perform communication. This makes it possible to easily and reliably set the identification information used for communication by the communication unit of the connector, and to realize a shortening of the manufacturing process and prevention of erroneous setting of the identification information. Cost reduction and reliability improvement can be realized.

It is a schematic diagram which shows the structure of the control system using the signal cable with a connector which concerns on this invention. It is a block diagram which shows the structure of the connector which concerns on Embodiment 1 of this invention. It is a chart which shows the ID number set by a switch. It is a typical perspective view which shows the external appearance of a connector and an electrical component. It is typical sectional drawing which shows one structural example of one switch of a connector, and one protrusion of an electrical component. It is a block diagram which shows the structure of the connector which concerns on Embodiment 2 of this invention. It is a flowchart which shows the procedure of the connection test | inspection process of the electrical equipment connected to the connector of the signal cable.

(Embodiment 1)
Hereinafter, the present invention will be specifically described with reference to the drawings showing embodiments thereof. FIG. 1 is a schematic diagram showing a configuration of a control system using a signal cable with a connector according to the present invention. In the figure, 1 is an ECU that performs control processing of a plurality of electrical components 4 mounted on a vehicle (not shown). The ECU 1 is connected to a plurality of electrical components 4 via a signal cable 2 provided with a plurality of connectors 3, and performs electrical signal transmission / reception, that is, communication for control via the signal cable 2. Control is performed. For example, when the illustrated control system is applied to a vehicle air conditioner (air conditioner), the electrical component 4 is a motor or actuator that opens and closes a flow path of cold air or warm air, and the ECU 1 sets temperature and wind direction by the user. The electric component 4 is operated in accordance with the above, and the amount and direction of the cool air or warm air are adjusted (the application of this system is not limited to the vehicle air conditioner).

  The signal cable 2 is a set of three wires, for example, a power line, a ground line, and a signal line. One end of the signal cable 2 is connected to the ECU 1 and a plurality of connectors 3 are spaced from one end to the other at appropriate intervals. It is provided apart. The connector 3 has terminals connected to the three electric wires of the signal cable 2, and is connected and fixed to the signal cable 2 by means such as pressure welding or welding. The connector 3 has a connection terminal for connecting to the electrical component 4 and also has a communication function for transmitting and receiving data to and from the ECU 1.

  The ECU 1 designates a preset ID (IDentifier) number for each electrical component 4 and transmits data related to control (for example, a control command for instructing the rotation amount and rotation direction of the motor). The data transmitted from the ECU 1 is transmitted to each connector 3 as an electrical signal in the signal cable 2, but is received by the connector 3 to which the electrical component 4 having the designated ID number is connected, and the designated electrical component is received. 4 performs the operation | movement according to control of ECU1.

  FIG. 2 is a block diagram showing the configuration of the connector 3 according to Embodiment 1 of the present invention, and shows the configuration of one of the connectors 3 connected and fixed to the signal cable 2. The connector 3 includes a communication control IC 31 and a drive circuit 32 therein and a plurality of female connection terminals 33 to which the electrical component 4 is connected.

  The communication control IC 31 of the connector 3 is connected to three electric wires of the signal cable 2 through three terminals (not shown). The connection between the terminal of the communication control IC 31 and the signal cable can be performed by a method such as pressure welding or welding, but may be performed by other methods. The communication control IC 31 receives data related to the control from the ECU 1 via the signal cable 2, gives a control signal corresponding to the received data to the drive circuit 32, and feedback data related to the drive given from the drive circuit 32. Is transmitted to ECU1.

  The communication control IC 31 is connected with three switches A to C. The communication control IC 31 needs an ID number when communicating with the ECU 1, and receives the transmission data when the ID number attached to the transmission data from the ECU 1 matches its own ID number. When data transmission is performed, the ID number is attached to the data and transmitted. The three switches A to C are used for setting the ID numbers used by the communication control IC 31 for communication, and eight (substantially seven) ID numbers according to the connection / disconnection of the switches A to C. Is set.

  FIG. 3 is a chart showing ID numbers set by the switches A to C. Each of the switches A to C is configured to be able to switch between two states of connection / cutoff. The ID number is 3-bit digital data in which the cutoff state of each of the switches A to C is digital “0”, the connection state is digital “1”, the switch A is the upper bit, and the switch C is the lower bit. expressed. Therefore, the ID number can be set in eight ways from “000” to “111” of digital, but “000” in which all the switches A to C are cut off indicates that the electrical component 4 is not connected, It is not used for communication (or used as an ID number for ECU 1).

  The drive circuit 32 of the connector 3 generates a drive signal for driving the electrical component 4 according to the control signal given from the communication control IC 31, and outputs it to the electrical component 4 via the connection terminal 33. The drive circuit 32 receives a feedback signal associated with the operation from the electrical component 4 and outputs feedback data based on this signal to the communication control IC 31.

  The electrical component 4 has a plurality of male connection terminals 43 for connection to the connection terminals 33 of the connector 3, and the connection terminals 43 are connected to the actuator 41 of the electrical component 4. The actuator 41 is operated by being driven by the drive signal input from the connector 3 via the connection terminal 43, and outputs a feedback signal indicating the drive amount or the like due to the operation to the connector 3 via the connection terminal 43.

  The electrical component 4 includes three switches connected to the communication control IC 31 of the connector 3 when the connection terminal 33 of the connector 3 and the connection terminal 43 of the electrical component 4 are connected and the electrical component 4 is connected to the connector 3. A switch operation unit 42 for operating A to C is provided. The switch operation unit 42 has one or a plurality of protrusions (in the example shown in FIG. 2, two protrusions 42 a and 42 b), and when the electrical component 4 is connected to the connector 3, the housing of the connector 3. The protrusion of the switch operation unit 42 is inserted into the opening formed in the switch, and the inserted protrusion switches the state of the switches A to C provided in the housing of the connector 3 (in the example shown in FIG. 2, the switch A , B). The switch operation unit 42 is provided with one to three protrusions at appropriate positions according to the type of the electrical component 4, and the communication control IC 31 performs communication by switching connection / disconnection of the three switches A to C. The ID number to be used is set (in the example shown in FIG. 2, the ID number is set to “110”). The switch operation unit 42 may be provided, for example, by forming a protrusion on a part of the housing of the electrical component 4, or may be provided with, for example, a rod-shaped pin arranged as a protrusion on the connection terminal 43. It may be provided by a method.

  In the connection structure of the electrical component 4 having the above configuration, three switches A to C are connected to the communication control IC 31 provided in the connector 3, and the switches A to C are operated when the electrical component 4 is connected to the connector 3. The plurality of connectors 3 provided in the signal cable 2 are all the same by providing a protruding portion that is configured to set the ID number used by the communication control IC 31 according to the combination of connection / cutoff of the three switches A to C. It can be set as a structure, and it can communicate with ECU1 with the ID number according to the shape of the switch operation part 42 of the electrical equipment 4 connected. Therefore, the versatility of the connector 3 can be improved, the versatility of the signal cable 2 provided with the plurality of connectors 3 can be improved, and the ID number can be set only by connecting the electrical component 4 to the connector 3. Incorrect number setting can be prevented.

  In the present embodiment, the signal cable 2 is composed of three electric wires, that is, a power line, a ground line, and a signal line. However, the present invention is not limited to this. You may comprise the signal cable 2 with an electric wire. In the example shown in FIG. 1, the signal cable 2 is provided with four connectors 3. However, the present invention is not limited to this, and three or less or five or more connectors 3 may be provided (provided on the connector 3). The number of switches is determined according to the number of connectors 3 provided in the signal cable 2). In the example shown in FIG. 1, the ECU 1 is directly connected to one end of the signal cable 2. However, the present invention is not limited to this, and the ECU 1 may be connected to the connector 3.

  Further, the electrical component 4 is not limited to a motor or an actuator, and other various electric devices may be connected to the connector 3 of the signal cable 2. For example, a sensor such as a vehicle speed sensor or a temperature sensor may be connected to the connector 3 as the electrical component 4 to transmit and receive the detection value to and from the ECU 1. Further, the communication control IC 31 of the connector 3 may perform not only communication with the ECU 1 but also communication with the communication control IC 31 of another connector 3. In FIG. 3, the ID number “000” is not used. However, the present invention is not limited to this. In addition, although the connector 3 includes the drive circuit 32, the configuration is not limited thereto, and the electrical component 4 may include the drive circuit 32. Further, the drive circuit 32 may be provided in the communication control IC 31.

  FIGS. 4A and 4B are schematic perspective views showing the external appearance of the connector 3 and the electrical component 4. FIG. 4A shows an example of the external appearance of the connector 3, and FIG. 4B shows an example of the external appearance of the electrical component 4. FIG. 5 is a schematic cross-sectional view showing a configuration example of one switch of the connector 3 and one protrusion of the electrical component 4. FIG. 5A shows a state where the connector 3 and the electrical component 4 are not connected. (B) shows a state in which the connector 3 and the electrical component 4 are connected. 3 shows the configuration in which the protrusion of the electrical component 4 connects the switch of the connector 3, but in the example shown in FIGS. 4 and 5, the switch of the connector 3 is connected when the electrical component 4 is not connected. In this state, the switch of the connector 3 is cut off by the protrusion of the electrical component 4. In addition, the structure of the connector 3 and the electrical component 4 shown in FIG.4 and FIG.5 is an example, and is not restricted to this.

  The connector 3 has a polyhedral housing, is connected and fixed to the signal cable 2 on one side of the housing, and has a plurality of round hole portions which are female connection terminals 33 on the opposite surface. A plurality of square hole portions in which the switches A to C are embedded are arranged in a line (see FIG. 4A). Further, the electrical component 4 has a cylindrical portion protruding from the side surface of the casing in which the actuator 41 and the like are accommodated, and a male connection terminal 34 is provided in the cylindrical portion. A plurality of round bar-like pins and square tube portions in which the protrusions 42a to 42c for operating the switches A to C of the connector 3 are accommodated in a line (see FIG. 4B). The electrical component 4 can be connected to the connector 3 by externally fitting the cylindrical portion of the electrical component 4 to the housing of the connector 3, whereby the connection terminal 43 of the electrical component 4 is connected to the connection terminal 33 of the connector 3. The rectangular tube portion of the electrical component 4 is inserted into the square hole portion of the connector 3. In FIG. 4B, the electrical component 4 has a configuration having three projections 42 a to 42 c, but has at least one projection 42 a to 42 c according to the ID number of the electrical component 4. Any configuration may be used.

  A round bar-like projection 42a is provided in the rectangular tube portion of the electrical component 4, and the projection 42a is formed of a non-conductive material. In addition, a recess for accommodating the switch A is provided in the square hole portion of the housing of the connector 3, and this recess is shaped to be fitted around the square tube portion of the electronic product 4. Switch A is erected. The switch A is configured to include a straight metal bar and a curved metal bar standing upright at the bottom of the recess, and the curved metal bar comes into contact with the linear metal bar at a tip portion thereof. As a result, the switch A is electrically connected so that the switch A is connected (see FIG. 5A).

  When the electrical component 4 is connected to the connector 3 and the square tube portion of the electrical component 4 is inserted into the square hole portion of the connector 3, the protrusions 42a of the electrical component 4 form two metal rods constituting the switch A of the connector 3 Inserted between. Thereby, since the protrusion 42a of the electrical component 4 is non-conductive, the two metal rods of the switch A are electrically cut off, so that the switch A is cut off (see FIG. 5B). .

  In this way, with the work of connecting the electrical component 4 to the connector 3, the switches A to C of the connector 3 are operated by the protrusions 42a to 42c of the electrical component 4, and the ID number is set. As a result, it is possible to reduce the time for setting the ID number in the manufacturing process and to prevent erroneous setting of the ID number.

(Embodiment 2)
The connector 3 according to the above-described first embodiment has a configuration in which an ID number used for communication is set according to switching of connection / cutoff of the switches A to C by the electrical component 4. On the other hand, in the connector 203 according to the second embodiment, an ID number is set in advance in the communication control IC 31, and an ID number set in accordance with connection / cutoff of the switches A to C by the electrical component 4 is set in advance. It is the structure which detects the misconnection of the electrical component 4 by determining whether it corresponds with the made ID number. The configuration of the second embodiment is suitable when the type or model number of the electrical component 4 to be connected is determined for each connector 203 provided in the signal cable 2.

  FIG. 6 is a block diagram showing the configuration of the connector 203 according to the second embodiment of the present invention. The communication control IC 31 of the connector 203 according to the second embodiment has a storage unit 35, and a preset ID number is stored in the storage unit 35. The storage unit 35 is configured by a non-volatile memory element such as a mask ROM (Read Only Memory) or an EEPROM (Electrically Erasable Programmable ROM), and an ID number is stored when the communication control IC 31 is manufactured. When the communication control IC 31 is manufactured and incorporated into the connector 203, the ID number is stored by being written by a device such as a ROM writer.

  As in the case of the first embodiment, the communication control IC 31 can determine the ID number according to the connection / cutoff states of the switches A to C. The communication control IC 31 compares the ID number stored in the storage unit 35 with the ID number determined according to the state of the switches A to C. If the two ID numbers match, the ECU 1 uses the ID number. Communication processing with. If the ID numbers do not match, the communication control IC 31 does not perform communication processing, and only transmits information indicating that the electrical component 4 connected to the connector 203 is incorrect.

  For example, in an inspection process in the manufacture of a vehicle using the signal cable 2 provided with the connector 203, an inspection device (not shown) is connected to the signal cable 2, and an inspection command is transmitted from the inspection device to each connector 203. The communication control IC 31 of the connector 203 that has received the inspection command from the inspection device determines whether the ID number stored in the storage unit 35 matches the ID number determined according to the states of the switches A to C. Data indicating whether the connection of the electrical component 4 is normal or abnormal is transmitted to the inspection device. Thereby, it is possible to easily and reliably check whether or not the electrical component 4 is correctly connected to each connector 203 of the signal cable 2.

  FIG. 7 is a flowchart showing the procedure of the connection inspection process of the electrical component 4 connected to the connector 203 of the signal cable 2, and is a process performed by the communication control IC 31 of each connector 203. First, the communication control IC 31 determines whether or not an inspection command from the inspection device transmitted via the signal cable 2 has been received (step S1). If no inspection command has been received (S1: NO) ), Wait until receiving the inspection command. When receiving the inspection command from the inspection device (S1: YES), the communication control IC 31 acquires the ID number determined according to the connection / cutoff state of the switches A to C (step S2) and stores them in advance. The obtained ID number is read from the storage unit 35 (step S3).

  Next, the communication control IC 31 compares the ID number acquired in step S2 with the ID number read in step S3, and determines whether or not both ID numbers match (step S4). If both ID numbers match (S4: YES), the communication control IC 31 sends normality notification by transmitting data indicating that the connection is normal to the inspection device (step S5), and ends the process. If the ID numbers do not match (S4: NO), the communication control IC 31 sends an abnormality notification by transmitting data indicating that the connection is abnormal to the inspection device (step S6), and ends the process. .

  In the present embodiment, the storage unit 35 is provided in the communication control IC 31. However, the present invention is not limited to this, and an IC chip such as a mask ROM or EEPROM is provided separately from the communication control IC 31. The configuration may be 35. In addition, the storage of the ID number by the communication control IC 31 is not limited to a configuration performed using a memory element such as a mask ROM or an EEPROM. For example, the ID number is set by providing a dip switch or a jumper pin on the connector 203. For example, the ID number may be set by the wiring pattern of the wiring board of the connector 203 on which the communication control IC 31 is mounted, or another configuration may be used.

  The connector 203 according to the second embodiment and other configurations of the system using the same are the same as those of the connector 2 according to the first embodiment and the system using the same. Reference numerals are assigned and detailed description is omitted.

1 ECU (other equipment)
2 Signal cable (Signal cable with connector)
3 Connector 4 Electrical component (Electrical equipment)
31 Communication control IC (communication unit, identification information determination means, determination means, erroneous connection notification means)
32 drive circuit 33 connection terminal 35 storage section (storage means)
41 Actuator 42 Switch operation part (part)
42a, 42b, 42c Projection 203 Connector AC Switch (Identification information determining means)

Claims (7)

In the connector fixed to the signal cable and provided with a connection terminal for connecting an electrical device,
A communication unit that performs communication processing between the electrical device connected to the connection terminal and the other device connected to the signal cable;
A connector comprising: identification information determining means for determining identification information when the communication unit performs communication according to the shape of a part of the electrical device connected to the connection terminal. With multiple switches,
2. The connector according to claim 1, wherein the identification information determination unit determines the identification information according to a combination of switches connected / disconnected in a part of the electrical device. Storage means for storing identification information set in advance;
Determination means for determining whether or not the identification information stored in the storage means matches the identification information determined by the identification information determination means;
The connector according to claim 1, further comprising: an erroneous connection notification unit that performs notification when the determination unit determines that the identification information does not match. A signal cable with a connector, wherein a plurality of the connectors according to any one of claims 1 to 3 are connected and fixed. In a device connection structure comprising a signal cable with a connector to which a plurality of connectors having connection terminals are fixed and connected, and an electric device connected to each connection terminal of the connector,
The connector is
A communication unit that performs communication processing between the electrical device connected to the connection terminal and the other device connected to the signal cable;
An apparatus connection structure comprising: identification information determining means for determining identification information when the communication unit performs communication according to a shape of a part of an electric apparatus connected to the connection terminal. The connector has a plurality of switches,
The electrical device has one or a plurality of protrusions for switching connection / cutoff of the switch,
6. The device connection according to claim 5, wherein the connector identification information determining means determines the identification information according to a combination of switches connected / cut off at the protrusion of the electrical device. Construction. The connector is
Storage means for storing identification information set in advance;
Determination means for determining whether or not the identification information stored in the storage means matches the identification information determined by the identification information determination means;
An erroneous connection notification means for notifying when the determination means determines that the identification information does not match,
The device connection structure according to claim 5 or 6, wherein the erroneous connection notification means notifies the inspection device connected to the signal cable by the communication unit.

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