JPH10233257A - Connector engagement state detecting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To detect coming-off a connector housing from a connector mounted on a circuit board or inverse engagement by a simple constitution. SOLUTION: When a sensor part 3 is in an OFF state, an input to an input port 9a becomes 5V and, when the sensor part 3 is in an ON state, the input to the input port 9a becomes 0V, whereby a state of the sensor part 3 can be detected. If a connector housing 5A comes off from a connector 2A, both of inputs to the input port 9a and an input port 9b of a microcomputer 9 become 5V. Coming-off of the connector housing 5A can be thereby detected.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for detecting an engagement state between a connector mounted on a circuit board and a connector housing.

[0002]

2. Description of the Related Art FIG. 12 is a view showing a connection state between a conventional circuit board and a sensor unit. A connector 2 is mounted on the circuit board 1, and a connector housing 5 is engaged with the connector 2 (hereinafter, referred to as a connector engaged state). Reference numeral 3 denotes a sensor unit for detecting an ON / OFF state, which is connected to the connector housing 5 by lead wires 4A and 4C. 6 is a DC positive power supply 5
A sensor input detection circuit section 9 connected to V is a microcomputer (hereinafter referred to as a microcomputer).

The conventional circuit board and the sensor unit are configured as described above. When the sensor unit 3 is off when the connector is engaged as shown in FIG. 12, the input to the microcomputer 9 is 5V. . Further, when the sensor section 3 is in the ON state, a current flows from the sensor input detection circuit section 6 to 0 V through the sensor section 3 and the lead wires 4A and 4C, so that the input to the microcomputer 9 is 0V. Thus, the on / off state of the sensor unit 3 can be detected.

However, when the connector housing 5 is detached from the connector 2 (hereinafter referred to as a connector detached state), the input to the microcomputer 9 is 5 V, but the input to the microcomputer 9 is in the connector engaged state and the sensor section 3 is the same as in the OFF state, and therefore cannot be detected as the connector detached state.

FIG. 13 shows, for example, JP-A-63-278111.
FIG. 1 is a configuration diagram illustrating a conventional connector engagement state detection device disclosed in Japanese Patent Application Laid-Open Publication No. HEI 10-133125. In the figure, reference numeral 41 denotes a female connector mounted on the circuit board 1 and having female contacts 41a and 41b. 42A to 42C are female contacts 41a, 4
43, a pattern wiring connected to 1b;
Is a male connector having male contacts 44a and 44b which engage with the female contacts 41a and 41b. Reference numeral 45 denotes a folded wiring connecting the male contacts 44a and 44b. The male connector 44 is connected to a signal cable (not shown) connected to an external device.

The conventional connector engagement state detecting device is constructed as described above, and outputs a confirmation signal for confirming the connector detachment state from the determination circuit 43 to the pattern wiring 42A. Wiring 45, contacts 44b, 41b and pattern wiring 42
After passing through B and 42C, the process returns to the determination circuit 43. Judgment circuit 43
Determines the connector disconnection state based on the level of the returned confirmation signal.

[0007]

In the conventional connector engagement state detecting device as described above, a confirmation signal is sent to the folded wiring 45 of the male connector 44, and the connector detached state is determined by the level of the returned confirmation signal. Since the determination is performed, a dedicated determination circuit 43 and a folded wiring 45 are required. Further, even if the separation of the folded wiring 45 can be detected, it is independent of the other signal cable lines. That is,
Since the connection of the entire connector is detected by the connection between the folded wiring 45 and the female connector 41, there is a problem that, for example, disconnection of the signal cable line or disconnection of the connector in the middle of the signal cable line cannot be detected.

The male connector 44 is connected to the female connector 4.
However, even if the male contact 44a is erroneously engaged with the female contact 41a and the male contact 44b is erroneously engaged with the female contact 41a, it cannot be detected. Further, although other connector engagement state detecting devices have been proposed, there is a problem that a special connector must be used or the connector needs to be improved.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has a simple structure for detecting a connector disengagement state or a reverse engagement state on and outside a circuit board. It is intended to provide a device.

[0010]

According to a first aspect of the present invention, there is provided a connector engagement state detecting device comprising: a first lead wire connected to one end of a sensor portion; and a circuit board connected to the other end of the sensor portion. And a third lead connected to the second lead and forming a circuit to the ground of the circuit board. And a second voltage detecting means for detecting an input change from the second lead wire.

Further, in the connector engagement state detecting device according to the second invention, a first lead wire connected to one end of the sensor portion and a voltage feedback loop to the circuit board connected to the other end of the sensor portion are formed. And a third lead connected to the second lead and forming a circuit to the ground of the circuit board.
And a fourth lead connected to the second lead and forming a voltage feedback loop via a voltage-dividing resistor in the circuit board. It comprises a first voltage detecting means for detecting, and a second voltage detecting means for detecting a change in input from the second or fourth lead wire.

Further, a connector engagement state detecting device according to a third aspect of the present invention is the device according to the first or second aspect, wherein the sensor section is constituted by a contact, a variable resistor or an electrode.

According to a fourth aspect of the present invention, in the first or third aspect of the present invention, the control of the actuator of the device is prohibited when the voltage feedback is not detected by the second voltage detecting means. It was made.

According to a fifth aspect of the present invention, there is provided the connector engagement state detecting device according to the second or third aspect, wherein the second voltage detecting means detects that the feedback voltage has reached the set voltage, and the actuator of the device is provided with the actuator. Is prohibited.

According to a sixth aspect of the present invention, in the connector engagement state detecting device according to the fourth or fifth aspect, when the control of the actuator is prohibited, it is displayed on a display unit on a circuit board. It was done.

According to a seventh aspect of the present invention, in the connector engagement state detecting device according to the fourth or fifth aspect, when the control of the actuator is prohibited, it is displayed on the display of the remote controller. It was done.

In the connector engagement state detecting device according to an eighth aspect of the present invention, a first lead wire connected to one end of the sensor portion and a voltage feedback loop connected to the other end of the sensor portion to the circuit board are formed. And a third lead connected to the second lead and forming a circuit to the ground of the circuit board.
, And an input from the first lead wire is detected, and this is compared with a reference value by a first comparator to detect a state of the sensor unit. Further, when an input from the second lead wire is detected and compared with a reference value by a second comparator and it is detected that the voltage is not fed back, this is displayed outside. .

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment 1 FIG. 1 to 5 are diagrams showing one embodiment of the first and third inventions of the present invention. FIG. 1 is a configuration diagram, FIG. 2 is an operation explanatory diagram, and FIGS. It is a block diagram showing the same, and the same reference numerals in the drawings denote the same or corresponding parts (the same applies to the following embodiments).

1 and 2, reference numeral 1 denotes a circuit board;
A is a connector mounted on the circuit board 1 and 3 is a circuit board 1
The sensor unit 4A, which is provided outside of the sensor and has a contact for detecting an on / off state, is connected to a first terminal connected to one end of the sensor unit 3.
, 4B and 4C are second and third leads connected to the other end of the sensor unit 3, the second lead 4B is for a voltage feedback loop, and the third lead 4C is for ground connection. (For common use). 5A is a connector housing connected to the first to third lead wires 4A to 4C and engaged with the connector 2A.

Reference numeral 6 denotes a sensor input detection circuit connected to the DC positive power supply 5V and connected to the first lead wire 4A when the connector is engaged. Reference numeral 7 denotes a sensor input detection circuit similarly connected to the DC positive power supply 5V and connected to the connector. This is a feedback voltage input detection circuit connected to the second lead wire 4B. Note that, in the connector engaged state, the third lead wire 4C is connected to ground 0V.

Reference numeral 8 denotes a control circuit of the device, 9 denotes a microcomputer, and a sensor input detection circuit 6 is connected to an input port 9a thereof.
The feedback voltage input detection circuit 7 is connected to the input port 9b. The sensor input detection circuit 6 and the microcomputer 9 constitute first voltage detection means, and the feedback voltage input detection circuit 7 and the microcomputer 9 constitute second voltage detection means.

In the connector engagement state detecting device as described above, when the sensor section 3 is off when the connector is in the engagement state as shown in FIG. 1, the sensor section 3, the first lead wire 4A and the sensor Since no current flows through the input detection circuit 6, the input to the input port 9a of the microcomputer 9 is 5V. The microcomputer 9 reads this input, and when this
In this case, it is determined that the sensor unit 3 is in the off state. When the sensor unit 3 is turned on in the connector engagement state, the sensor input detection circuit 6, the sensor unit 3, and the first and third
Current flows through the lead wires 4A and 4C of the
Input to the input port 9a is 0V. At this time, it is determined that the sensor unit 3 is on.

The feedback voltage input detection circuit 7 has a second
Since the current always flows through the third lead wires 4B and 4C, the input to the input port 9b of the microcomputer 9 is always 0.
V. Thus, the on / off state of the sensor unit 3 is detected. Next, as shown in FIG. 2, when the connector is disconnected, the input to the input port 9a of the microcomputer 9 is always 5V.
However, since the second and third lead wires 4B and 4C are disconnected from the feedback voltage input detection circuit 7, no current flows through the feedback voltage input detection circuit 7.

For this reason, the input to the input port 9b of the microcomputer 9 becomes 5 V, and it is determined that the connector is disconnected. At this time, since the state of the sensor unit 3 cannot be detected by the microcomputer 9, it is not determined whether the sensor unit 3 is on or off. In this manner, the input changes of the first and second lead wires 4A and 4B are different between the ON state and the OFF state of the sensor unit 3 in the connector engaged state and the connector detached state, and thus are simpler than in the related art. With such a configuration, it is possible to detect the input of the sensor unit 3 and to detect the connector detached state.

FIG. 3 shows another embodiment of the first embodiment, in which a variable resistor 10 having an extremely large resistance value is used as the sensor section 3 of FIG. Also in this case, as described above, the input change of the first and second lead wires 4A and 4B is caused when the variable resistor 10 has an extremely large resistance value in the connector engaged state, that is, when the variable resistor 10 is close to the off state. It differs depending on whether the connector is disconnected. Therefore, it can be distinguished whether the variable resistor 10 is in a state of an infinitely large resistance value or in a connector detached state. When the connector is disconnected, the determination based on the input of the resistance value of the variable resistor 10 is not performed.

FIG. 4 shows another embodiment of the first embodiment, in which electrodes 12A and 12B immersed in a conductive substance 11 such as water are used as the sensor section 3 of FIG. In this case as well, since the connector disconnection state can be determined in the same manner,
It can be determined whether the conductive material 11 is not present or the connector is disconnected. Note that when the connector is disconnected, the presence or absence of the conductive substance 11 is not determined.

FIG. 5 also shows another embodiment of the first embodiment, in which a sensor section 3, a variable resistor 10, and electrodes 12A, 12B are shown.
(A plurality of the same type may be provided.) Also in this case, by providing the second lead wire 4B and the feedback voltage input detection circuit 7 only in the same configuration and taking the input into the microcomputer 9, the connector engagement state and the disconnection state can be detected. It is possible.

Embodiment 2 6 and 7 are diagrams showing one embodiment of the second and third inventions of the present invention. FIG. 6 is a configuration diagram, and FIG. 7 is an operation explanatory diagram. In this embodiment, a fourth lead wire 4D is provided in parallel with the third lead wire 4C of FIG. 1, and is connected to the ground 0 V via the input voltage dividing resistor 13 when the connector is engaged. It has become.

As shown in FIG. 6, when the connector 3 is in the engaged state and the sensor 3 is off, the sensor 3 and the first
No current flows through the lead wire 4A and the sensor input detection circuit 6, so that the input to the input port 9a of the microcomputer 9 becomes 5 V. When the sensor unit 3 is in the ON state, the sensor input detection circuit 6, the sensor unit 3 First and third lead wires 4A, 4
Since a current flows through C, the input to the input port 9a of the microcomputer 9 becomes 0V. At this time, since no current flows through the resistor 13, there is no influence on the input of the input port 9a by the resistor 13.

Although the current always flows through the feedback voltage input detection circuit 7 through the second and third leads 4B and 4C, no current flows through the fourth lead 4D and the resistor 13. , Input port 9 of microcomputer 9 by resistor 13
b has no effect on the input, and the input to the input port 9b is always 0V.

The first embodiment is for detecting the detached state of the connector, while the second embodiment is for detecting the reverse engagement of the connector. That is, as shown in FIG. 7, when the connector 2B and the connector housing 5B are forcibly and reversely engaged, or when the connector 2B and the connector housing 5B have a structure that can be engaged in any of the vertical and horizontal directions,
If the two are erroneously engaged in the opposite direction, the third lead wire 4C is connected to the sensor input detection circuit 6 by the fourth lead wire 4C.
D is connected to the feedback voltage input detection circuit 7.

Therefore, if the sensor section 3 is in the off state, the sensor input detection circuit 6 and the third and second lead wires 4
Since current flows through C and 4B and the resistor 13, the microcomputer 9
Is input to the input port 9a at a voltage determined by the voltage division ratio between the sensor input detection circuit 6 and the resistor 13. The feedback voltage input detection circuit 7 includes the fourth and second lead wires 4.
Since current flows through D and 4B and the resistor 13, the input to the input port 9b of the microcomputer 9 also has a voltage determined by the voltage division ratio between the feedback voltage input detection circuit 7 and the resistor 13.

An arbitrary voltage is determined in advance by the microcomputer 9, and when a current flows through the feedback voltage input detection circuit 7, the fourth and second lead wires 4D and 4B, and the resistor 13, an input to the input port 9b is input. Resistor 1 so that
If the value of 3 is set, when the input to the microcomputer 9 matches the set voltage, it is determined that the engagement directions of the connector 2 and the connector housing 5 are opposite. At this time,
Since the state of the sensor unit 3 cannot be detected by the microcomputer 9, the state of the sensor unit 3 is not determined.

Thus, as in the first embodiment,
With a simple configuration, it is possible to detect the input of the sensor unit 3 and the disconnection state of the connector, and change the input of the second or fourth lead wire 4B, 4D between the connector normal engagement state and the reverse engagement state. Therefore, it is possible to detect the connector reverse engagement state with a simple configuration. Needless to say, the embodiments of FIGS. 3 to 5 can be applied to the second embodiment.

Embodiment 3 FIG. FIG. 8 is an operation flowchart showing an embodiment of the fourth invention of the present invention. 1 and 2 are also used in the third embodiment. next,
The operation of this embodiment will be described with reference to FIG. The program in this flowchart is executed by the microcomputer 9
OM (not shown).

In step S1, it is determined whether or not a feedback voltage has been detected by the feedback voltage input detection circuit 7. If detected, the flow proceeds to step S5, and if not detected, the flow proceeds to step S2. In step S2, the detection of the feedback voltage is repeated for a fixed time. If the feedback voltage has not been detected for a certain period of time, the connector disconnection flag is set to "1" in step S3, and the process proceeds to step S4, in which the control circuit 8 prohibits the control of the device actuator.

Here, steps S1 to S4 constitute control inhibiting means. Note that the above is also applicable to the second embodiment. In this way, if the feedback voltage has not been detected for a certain period of time, it is determined that the connector has been disconnected and control of the actuator of the device is prohibited.
When the connector is in the on state, the sensor unit 3 can be prevented from being erroneously controlled without being erroneously detected as being in the off state even if the connector is disconnected.

Embodiment 4 FIG. This is an embodiment of the fifth invention of the present invention, and shares FIGS. 6 to 8. The operation of this embodiment will be described with reference to FIG. As described in the third embodiment, when the feedback voltage is detected in step S1 and the process proceeds to step S5, it is determined whether the feedback voltage has reached the set voltage. Perform normal display. If it is determined in step S5 that the set voltage has been reached, the process proceeds to step S7, and the detection of the set voltage is repeated for a predetermined time.

If the state in which the set voltage is detected for a certain period of time continues, the process proceeds to step S4, and the control circuit 8 prohibits the control of the actuator of the device. Here, step S5
S7 and S4 constitute control prohibition means. In this way, when the feedback voltage has been at the set voltage for a certain period of time, the connector is determined to be in the reverse engagement state, and control of the actuator of the device is prohibited. Erroneous control operation of the device can be prevented without erroneous detection.

Embodiment 5 FIG. 9 is a block diagram showing an embodiment of the sixth invention of the present invention. 1 and 2
8 is also used in this embodiment. In FIG. 9, reference numerals 9c and 9d denote output ports of the microcomputer 9, and 15A, 1
5B is a buffer connected to the output ports 9c and 9d, 17 is an abnormality display device connected to the buffers 15A and 15B, and 17a and 17b are light emitting diodes (LE).
D) and the like.

Next, the operation of this embodiment will be described with reference to FIG. As in the third embodiment, steps S1 to S1
When the connector disconnection state is detected in S4, the process proceeds to step S8, where the output is performed from the output port 9c, and the LED 17a of the abnormality display device 17 is turned on via the buffer 15A. Here, step S8 constitutes display means. In this way, if the control of the actuator of the device is prohibited when the connector is in the detached state, this is displayed, so that the device user can confirm the detached state of the connector.

Embodiment 6 FIG. This is another embodiment of the sixth invention of the present invention, and shares FIGS. 6 to 9. The operation of this embodiment will be described with reference to FIG. As in the third embodiment, when the connector reverse engagement state is detected in steps S1, S5, S7, and S4, the process proceeds to step S8, where the LED 17b of the abnormality display device 17 is output from the output port 9d via the buffer 15B. Light. In this manner, when the control of the actuator of the device is prohibited when the connector is in the reverse engagement state, this is displayed, so that the device user can confirm the connector reverse engagement state.

Embodiment 7 FIG. FIG. 10 is a configuration diagram showing an embodiment of the seventh invention of the present invention. FIGS. 1, 2 and 8 are also used in the seventh embodiment. In FIG. 10, reference numeral 18 denotes an operation device for remotely controlling a device connected to the circuit board 1 of FIG. 1, and reference numeral 18a denotes a display unit thereof.

Next, the operation of this embodiment will be described with reference to FIG. As in the fifth embodiment, steps S1 to S1
When the connector disconnection state is detected in S4 and S8, the process proceeds to step S9, and it is determined whether the connector disconnection flag is “1”. If the connector disconnection flag is "1", information on the connector disconnection state is transmitted to the remote controller 18 in step S10. Upon receiving the data, the remote controller 18 displays the information on the display unit 18a. Here, step S
9, S10 constitute a remote display means.

As described above, when the control of the actuator is prohibited by the device when the connector is in the detached state, this is displayed remotely, so that the user can confirm the detached state of the connector from a remote position.

Embodiment 8 FIG. This is another embodiment of the seventh invention of the present invention, which shares FIG. 6 to FIG. 8 and FIG.
This embodiment will be described with reference to FIG. As in the sixth embodiment, the connector reverse engagement state is detected in steps S1, S5, S7, S4, and S8, and when the LED 17b is turned on, the process proceeds to step S9, and it is determined whether the connector disconnection flag is "1". . If the connector disconnection flag is "0", information on the connector reverse engagement state is transmitted to the remote controller 18 in step S11. Upon receiving the data, the remote controller 18 displays the information on the display unit 18a. here,
Steps S9 and S11 constitute remote display means.

As described above, when the control of the actuator of the device is prohibited when the connector is in the reversely engaged state, this is displayed remotely, so that the user can confirm the reversely engaged state of the connector from a remote position. It becomes possible.

Embodiment 9 FIG. FIG. 11 is a configuration diagram showing an embodiment of the eighth invention of the present invention. 1 and 2 are also used in the ninth embodiment. In FIG. 11, 3
1A and 31B are first and second comparators, R _{1 to} R ₄
Is a resistor, 32 is a relay, 32a is its normally open contact, 33
Is a power supply, and 34 is a display provided outside. In addition,
It is assumed that the connector housing 5A shown in FIG. 1 is engaged with the connector 2A.

Next, the operation of this embodiment will be described.
The reference voltage divided by the resistors R ₁ and R ₃ is input to the positive terminals of the first and second comparators 31A and 31B. The first comparator 31A is for displaying the state of the sensor section 3. When the connector section is engaged, the output of the sensor section 3 becomes 0 V and the output is inverted.
Is displayed.

The second comparator 31B is for detecting the state of disconnection of the connector, and the values of the resistors R _{1 to} R ₃ are determined when the input of the negative terminal of the second comparator 31B is 5V.
The output of the comparator 31B is inverted. Thus, when the connector disconnection state occurs, the voltage of the feedback voltage input detection circuit 7 becomes 5 V, and the output of the second comparator 31B is inverted. This output energizes the relay 32, and the contact 32a is closed. Thus, the display 34 is turned on.

As described above, when the connector is disconnected, the indicator 34 is turned on to allow the user to confirm the disconnected state. In this embodiment, since a microcomputer is not required, the configuration can be made at a low cost.

[0052]

As described above, according to the first aspect of the present invention, a first lead wire connected to one end of a sensor section is provided.
A second lead connected to the other end of the sensor unit to form a voltage feedback loop to the circuit board; a third lead connected to the second lead to form a circuit to the ground of the circuit board; And a first voltage detecting means for detecting an input change from the first lead wire and a second voltage detecting means for detecting an input change from the second lead wire. With such a configuration, it is possible to detect the input of the sensor unit and the detached state of the connector.

Further, in the second invention, a first lead wire connected to one end of the sensor portion, a second lead wire connected to the other end of the sensor portion and forming a voltage feedback loop to the circuit board, A third lead connected to the second lead and forming a circuit to the ground of the circuit board; and a voltage feedback loop connected to the second lead via a voltage-dividing resistor in the circuit board. A first voltage detecting means having a fourth lead wire for detecting an input change from the first lead wire;
A second method for detecting an input change from the second or fourth lead wire
In addition to the effects of the first invention, it is possible to detect the connector reverse engagement state with a simple configuration.

According to the third aspect of the present invention, the sensor unit includes a contact,
Since it is configured with a variable resistor or an electrode, it can be widely used for various sensor units.

In the fourth invention, when the voltage feedback is not detected by the second voltage detecting means, and in the fifth invention, when the feedback voltage becomes the set voltage by the second voltage detecting means, Since the control of the actuator of the device is prohibited, the erroneous control operation of the device can be prevented even if the connector is disconnected or the connector is reversely engaged.

In the sixth invention, when the control of the actuator is prohibited, this is displayed on the display section on the circuit board, so that the user of the circuit board can check whether the connector is disconnected or the connector is reversely engaged. You can see above.

Further, in the seventh invention, when the control of the actuator is prohibited, it is displayed on the display unit of the remote controller, so that the user of the device can externally determine whether the connector is disconnected or the connector is reversely engaged. You can check.

According to the eighth invention, a first lead wire connected to one end of the sensor portion, a second lead wire connected to the other end of the sensor portion and forming a voltage feedback loop to the circuit board, A third lead connected to the second lead and forming a circuit to the ground of the circuit board. The input from the first lead is detected, and the input is detected by a first comparator. To detect the state of the sensor unit. Also,
Since the input from the second lead wire is detected and compared with the reference value by the second comparator, and when it is detected that the voltage is not fed back, this is displayed externally.
It is possible to realize with a low-cost configuration that a user can check the detached state of the connector from outside without using a microcomputer.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing a first embodiment and a third embodiment of the present invention.

FIG. 2 is an operation explanatory diagram of FIG. 1;

FIG. 3 is a configuration diagram showing another embodiment of the first embodiment of the present invention.

FIG. 4 is a configuration diagram showing another embodiment of the first embodiment of the present invention.

FIG. 5 is a configuration diagram showing another embodiment of the first embodiment of the present invention.

FIG. 6 is a configuration diagram showing a second embodiment and a fourth embodiment of the present invention.

FIG. 7 is an operation explanatory diagram of FIG. 6;

FIG. 8 is an operation flowchart showing Embodiments 3 to 8 of the present invention.

FIG. 9 is a configuration diagram showing a fifth embodiment and a sixth embodiment of the present invention.

FIG. 10 is a block diagram showing a seventh embodiment and an eighth embodiment of the present invention;
FIG.

FIG. 11 is a configuration diagram showing a ninth embodiment of the present invention.

FIG. 12 is a diagram showing a connection state between a conventional circuit board and a sensor unit.

FIG. 13 is a configuration diagram showing a conventional connector engagement state detection device.

[Explanation of symbols]

1 circuit board, 2A, 2B connector, 3 sensor part,
4A to 4D first to fourth lead wires, 5A, 5B connector housing, 6 first voltage detection circuit (sensor input detection circuit), 7 second voltage detection circuit (feedback voltage input detection circuit), 9 microcomputers, 10 Variable resistor, 12A, 12
B electrode, 17a, 17b display unit (LED), 18
Remote controller, 18a display unit, 31A first comparator, 31B second comparator, 32a relay contact, 34 display, S1 to S4, S5, S7, S4 control inhibiting means, S8 display means, S9 to S11 remote display means.

Claims (8)

[Claims] A connector mounted on a circuit board, a connector housing having three lead wires and engaging with the connector, and a sensor having an on / off state;
A first lead wire connected to one end of the sensor unit, a second lead wire connected to the other end of the sensor unit to form a voltage feedback loop to the circuit board, A first voltage detecting means for detecting a change in input from the first lead wire, the first voltage detecting means comprising a third lead wire connected to the lead wire of the third circuit and forming a circuit to the ground of the circuit board; And a second voltage detecting means for detecting a change in input from the second lead wire. 2. A connector having a connector mounted on a circuit board, a connector housing having four lead wires engaged with the connector, and a sensor unit having an on / off state.
A first lead wire connected to one end of the sensor unit, a second lead wire connected to the other end of the sensor unit to form a voltage feedback loop to the circuit board, And a third lead connected to the first lead and forming a circuit to the ground of the circuit board and a voltage feedback loop connected to the second lead via a voltage dividing resistor in the circuit board. A first voltage detecting means configured to detect a change in input from the first lead, and a second voltage detecting means configured to detect a change in input from the second or fourth lead. A connector engagement state detection device comprising: voltage detection means. 3. The connector engagement state detecting device according to claim 1, wherein the sensor section is configured by a contact, a variable resistor, or an electrode. 4. A control circuit for controlling an actuator of a device according to a state of a sensor unit, and a control prohibiting unit for prohibiting an operation of the control circuit when voltage feedback is not detected by a second voltage detecting unit. The connector engagement state detecting device according to claim 1 or 3, wherein: 5. A control circuit for controlling an actuator of a device in accordance with a state of a sensor unit, and prohibiting operation of the control circuit when the second voltage detecting means detects that the feedback voltage has reached a set voltage. The connector engagement state detecting device according to claim 2 or 3, further comprising means. 6. The connector engagement according to claim 4, further comprising a display unit provided on the circuit board, and a display unit for displaying the control prohibiting unit on the display unit when the control prohibiting unit operates. State detection device. 7. A remote controller for externally operating a device connected to the circuit board, and remote display means for displaying a control prohibiting device on a display unit provided on the remote controller when the control prohibiting device operates. The connector engagement state detecting device according to claim 4 or 5, wherein 8. A connector mounted on a circuit board, a connector housing having three lead wires and engaging with the connector, and a sensor part having an on / off state, wherein the lead wires are provided. A first lead connected to one end of the sensor unit, a second lead forming a voltage feedback loop to the circuit board connected to the other end of the sensor unit, and the second lead , And a third lead wire forming a circuit to the ground of the circuit board.
A first voltage detection circuit for detecting an input from the first lead wire; and a first voltage detection circuit for comparing the input detected by the first voltage detection circuit with a reference value to detect a state of the sensor unit. A comparator, a second voltage detecting circuit for detecting an input from the second lead wire, and comparing the input detected by the second voltage detecting circuit with a reference value to detect that the voltage is not fed back. A connector engagement state detection device, comprising: a second comparator that performs the operation; and a display that externally displays the operation of the second comparator when the second comparator operates.