JP2015158044A - Opening/closing body control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To properly control an opening/closing body by appropriately detecting sinking in water and flooding with water without requiring a configuration change.SOLUTION: An opening/closing body control device 10 includes: a motor body 14 for driving an opening/closing body 10a mounted on a vehicle in a driving direction of an opening direction and a closing direction; a first switch 21 and a second switch 23 for operating the driving direction of the motor body 14 by switching a plurality of contacts 21a, 21b, 23a, and 23b; a motor circuit board 13 on which a circuit is packaged for driving the motor body 14 by discriminating the driving direction from a difference of resistance values Rup and Rdn connected to the plurality of contacts, respectively; a sinking detection section 25 for detecting flooding with water and sinking in water; and a bias constant current circuit 26 which makes a predetermined current flow to the circuit so as to drive the motor body 14 in the opening direction regardless of the difference between the resistance values Rup and Rdn when the sinking detection section 25 detects flooding with water or sinking in water.

Description

  The present invention relates to an opening / closing body control device.

2. Description of the Related Art Conventionally, there is known a power window device including a submergence detection circuit inside a casing that houses a circuit board on which a power window driving circuit is mounted (see, for example, Patent Document 1).
Conventionally, there has been known a power window control unit in which a power window actuator and a control circuit are formed in an integral waterproof structure, and an operation switch provided outside the waterproof structure is provided with a set electrode for inundation detection. (For example, refer to Patent Document 2).

JP 2000-315446 A JP 2010-159012 A

By the way, in the power window device according to the above prior art, when the actuator of the power window is housed in the waterproof casing integrally with the circuit board, it is necessary to provide a submergence detection circuit outside the casing. In this case, it is necessary to provide a pin for connecting the submergence detection circuit to a connector for connecting the actuator and circuit board in the housing to a circuit outside the housing, which causes a problem that the number of pins of the connector increases. .
Further, in response to such a problem, the power window control unit according to the conventional technique increases the wiring by performing operation detection and short circuit detection by water immersion using the wiring connected to the operation switch. It is preventing. However, according to the power window control unit, in order to determine the terminal voltage of the operation switch, the comparator for detecting a short circuit due to water immersion is provided in addition to the comparator for detecting the operation, which causes a problem that the circuit becomes large. . In addition, since the resistance value when the assembled electrode is short-circuited due to water immersion is used for determination, the desired resistance value necessary for inundation detection cannot be obtained depending on the resistance variation due to aging of the assembled electrode or the components of the immersion liquid. There is a fear.

  The present invention has been made in view of the above circumstances, and provides an opening / closing body control apparatus capable of appropriately detecting submergence and flooding without appropriately changing the configuration and appropriately controlling the opening / closing body. It is an object.

In order to solve the above problems and achieve the object, the present invention employs the following aspects.
(1) An opening / closing body control apparatus according to an aspect of the present invention includes a motor (for example, a driving device for driving an opening / closing body (for example, the opening / closing body 10a in the embodiment) mounted in a vehicle in an opening direction and a closing direction. An operation switch (for example, operating the driving direction of the motor by switching between the motor 61 in the embodiment) and a plurality of contacts (for example, the pair of contacts 21a and 21b and the pair of contacts 23a and 23b in the embodiment). The first switch 21 and the second switch 23) in the embodiment and the resistance value (for example, the resistance value Rup and the resistance value Rdn in the embodiment) connected to each of the plurality of contacts are used to change the driving direction. A motor circuit board (for example, the motor circuit board 13 in the embodiment) on which a circuit that discriminates and drives the motor is mounted, and a detection unit (for example, in the embodiment) that detects flooding or submersion When the submersion detection unit 25) and the detection unit detect flooding or submergence, a predetermined current is supplied to the circuit so as to drive the motor in the opening direction regardless of the difference in the resistance value. Biasing means (for example, the bias constant current circuit 26 in the embodiment).

(2) In the opening / closing body control device according to (1), the detection unit includes a plurality of electrodes (for example, a pair of electrodes 25a and 25b in the embodiment) that are conductive by being submerged or submerged, and the bias The means includes a constant current source (for example, the power supply 41 and the bias constant current circuit 26 in the embodiment) that conducts the predetermined current between the plurality of electrodes when the plurality of electrodes are conducted, Biasing means is connected in parallel with the plurality of contacts of the operation switch.

(3) In the opening / closing body control device according to (1) or (2), the motor is a motor unit in which a motor main body (for example, the motor main body 14 in the embodiment) and the motor circuit board are integrated. (For example, the motor unit 60 in the embodiment), the motor unit includes a sealed waterproof structure housing (for example, the housing 62 in the embodiment), and the detection unit includes the operation switch. A connector (for example, the connector 12 in the embodiment) is provided in a non-waterproof portion of the switch circuit board on which the plurality of contacts are mounted, and connects the motor circuit board and the switch circuit board.

(4) In the opening / closing body control device according to any one of (1) to (3), the circuit determines the opening direction and the closing direction. A plurality of comparators having different reference voltages V1 and V2) (for example, the first comparator 48 and the second comparator 49 in the embodiment), and the reference voltage of the comparator that performs the determination of the opening direction is The closing direction is set when the current value and the resistance value of the bias unit are detected by the detection unit to be wet or submerged, and are set higher than the reference voltage of the comparator that performs the determination of the closing direction. The comparator outputs a voltage lower than the reference voltage, and the detection unit detects water exposure or submergence and operates the operation switch. It is configured to output the reference voltage or more of the comparators performing the open direction determination regardless the difference in the resistance value when.

(5) In the opening / closing body control device according to any one of (1) to (4), the opening / closing body is a power window, and the operation switch is a power window for operating opening / closing of the power window. Switch.

  According to the switching body control device according to the aspect described in (1) above, since the current flowing through the connection of the contact point is biased when it is submerged or submerged, the aging of the electrode is compared with the case where the resistance value of the detection unit is detected. Stable judgment can be performed regardless of deterioration. Accordingly, the motor can be reliably driven in the opening direction when the flooding or submergence is detected.

  According to the switch control device according to the aspect described in (2) above, the bias unit is configured by the constant current source that is connected in series to the detection unit and connected in parallel to the plurality of contacts of the operation switch. There is no need to provide two systems of comparators for determining the motor drive direction (that is, the opening direction and the closing direction) and for detecting flooding and submergence, and it is possible to prevent the cost required for the circuit configuration from increasing. .

  According to the opening / closing body control device according to the aspect described in the above (3), even when the motor unit has a waterproof structure, it is possible to reliably detect water exposure and submersion, and using an existing connector. Since it connects, it can prevent that the expense which a circuit structure requires increases.

  According to the opening / closing body control device according to the aspect described in (4) above, the opening / closing body is driven in the opening direction only when the flooding or submergence is detected and the operation switch is operated. It is possible to prevent the opening / closing body from being driven unintentionally. Further, when the operation switch is operated, the opening / closing body can be driven in the opening direction that is always on the safe side.

  According to the opening / closing body control device according to the aspect described in (5) above, the power window can be safely driven.

It is a block diagram of the opening-closing body control apparatus which concerns on embodiment of this invention. It is a block diagram of the constant current circuit of the switching body control apparatus which concerns on embodiment of this invention. It is a block diagram of the 1st-4th constant current circuit of the switching body control apparatus which concerns on the modification of embodiment of this invention.

Hereinafter, an opening / closing body control apparatus according to an embodiment of the present invention will be described with reference to the accompanying drawings.
The opening / closing body control apparatus 10 according to the present embodiment controls, for example, an opening / closing body 10a that is mounted on a vehicle and that is electrically opened and closed. The opening / closing body 10a is, for example, a power window, a sunroof, a power slide door, and a door lock.
As shown in FIG. 1, the opening / closing body control device 10 includes a switch circuit board 11, a connector 12, a motor circuit board 13, and a motor main body 14.

The switch circuit board 11 includes a first switch 21 and a first resistor 22, a second switch 23 and a second resistor 24, a submergence detection unit 25, and a bias constant current circuit 26. In the switch circuit board 11, the submergence detection unit 25 is provided in a non-waterproof part.
The first switch (for example, a power window switch) 21 includes a pair of contacts 21a and 21b that can be opened and closed. The first switch 21 is open when the operator is not operating, and switches from open to closed according to the operation of the operator. The first switch 21 instructs the opening / closing body 10a to be closed (for example, raising the power window: UP) in the closed state. The first switch 21 is connected to the first resistor 22 in series. The first resistor 22 has a resistance value Rup.
The second switch (for example, a power window switch) 23 includes a pair of contacts 23a and 23b that can be switched between open and closed. The second switch 23 is open when the operator is not operating, and switches from open to closed according to the operation of the operator. The second switch 23 instructs the opening / closing body 10a to open (for example, lowering of the power window: DOWN) in the closed state. The second switch 23 is connected to the second resistor 24 in series. The second resistor 24 has a resistance value Rdn.

  The submergence detection unit 25 includes at least a pair of electrodes 25a and 25b that are spaced apart. At least the pair of electrodes 25a and 25b are arranged so as to be shut off when water or submergence has not occurred and to conduct (short-circuit) when water or submergence has occurred. The submergence detection unit 25 is connected in series to the bias constant current circuit 26.

  The bias constant current circuit 26 energizes a bias current having a constant current value I0 between the pair of electrodes 25a and 25b when the pair of electrodes 25a and 25b of the submergence detection unit 25 is conducted. As shown in FIG. 2, the bias constant current circuit 26 is a so-called feedback type constant current circuit. The bias constant current circuit 26 includes two npn transistors (Qa, Qb) 31, 32 and two resistors (Ra, Rb) 33, 34. The collector of one npn transistor (Qa) 31 is connected to a power source 41 described later via one resistor (Ra) 33 and the electrode 25a of the submergence detection unit 25, and the base of the other npn transistor (Qb) 32 It is connected to the. The emitter of one npn transistor 31 is grounded. The collector of the other npn transistor 32 is connected to the electrode 25 b of the submergence detection unit 25. The emitter of the other npn transistor 32 is connected to the base of one npn transistor 31 and grounded via the other resistor (Rb) 34.

In the bias constant current circuit 26, when the pair of electrodes 25a and 25b of the submergence detection unit 25 is turned on, a voltage is applied to the base of the other npn transistor (Qb) 32 by one resistor (Ra) 33 by a power source 41 described later. The other npn transistor (Qb) 32 is turned on. When the current Ib flows between the collector and emitter of the other npn transistor (Qb) 32, the current Ib also flows through the other resistor (Rb) 34. Here, when the current value Ib of the current flowing through the other resistor (Rb) 34 exceeds a predetermined current value I0, the voltage (Ib × Rb) applied to the base of one npn transistor (Qa) 31 is predetermined. Is exceeded, one npn transistor (Qa) 31 is turned on. Then, when the base of the other npn transistor (Qb) 32 becomes the ground voltage (0 V), the other npn transistor (Qb) 32 is turned off.
The bias constant current circuit 26 conducts a bias current having a constant current value I0 between the pair of electrodes 25a and 25b by repeating the above-described operation.

  The first switch 21 and the first resistor 22, the second switch 23 and the second resistor 24, the submergence detection unit 25, and the bias constant current circuit 26 are parallel between the first terminal 12 a and the second terminal 12 b of the connector 12. It is connected to the.

The motor circuit board 13 includes a power source 41, a diode 42, first to third reference resistors (R1 to R3) 43 to 45, a Zener diode 46, an input resistor 47, a first comparator 48, and a second comparator. 49 and a control unit 50.
The power supply 41 is a DC power supply such as a 12V battery mounted on the vehicle, for example, and outputs a power supply voltage VB. The power supply 41 is connected to the first terminal 12 a of the connector 12 via the diode 42. The power source 41 is connected to a third reference resistor (R3) 45 and is grounded via first to third reference resistors (R1 to R3) 43 to 45 connected in series.

The Zener diode 46 has a cathode connected to the second terminal 12b of the connector 12 and an anode grounded.
The input resistor 47 is connected between the second terminal 12b of the connector 12, the non-inverting input terminal of the first comparator 48, and the non-inverting input terminal of the second comparator 49, and the ground point. The input resistor 47 has a resistance value Rr.

  The first comparator 48 has a non-inverting input terminal connected to the second terminal 12 b of the connector 12 and an inverting input terminal connected to a connection point between the first reference resistor (R 1) 43 and the second reference resistor (R 2) 44. ing. As a result, the first comparator 48 compares the input voltage Vin of the second terminal 12b of the connector 12 and the first reference voltage V1 at the connection point between the first reference resistor (R1) 43 and the second reference resistor (R2) 44. A signal corresponding to the sign of the difference (Vin−V1) is output to the control unit 50.

  The second comparator 49 has a non-inverting input terminal connected to the second terminal 12 b of the connector 12 and an inverting input terminal connected to a connection point between the second reference resistor (R 2) 44 and the third reference resistor (R 3) 45. ing. As a result, the second comparator 49 causes the input voltage Vin of the second terminal 12b of the connector 12 and the second reference voltage V2 (>) at the connection point between the second reference resistor (R2) 44 and the third reference resistor (R3) 45. A signal corresponding to the sign of the difference (Vin−V2) from V1) is output to the controller 50.

  The resistance values Rr, Rup, and Rdn are set as shown in the following formulas (1) and (2) by the power supply voltage VB, the first reference voltage V1, the second reference voltage V2, and the current value I0. Yes.

The control unit 50 controls the rotational drive of the motor body 14 in accordance with the signals output from the first comparator 48 and the second comparator 49. When the negative signal is output from the first comparator 48 and the second comparator 49 (that is, when Vin <V1 and Vin <V2), the control unit 50 stops driving the motor body 14.
When the signal having a positive sign is output from the first comparator 48 and the negative signal is output from the second comparator 49 (that is, when V2>Vin> V1), the control unit 50 opens the opening / closing body 10a. The drive of the motor main body 14 is controlled so as to drive in the closing direction (for example, power window rise: UP).
When positive signals are output from the first comparator 48 and the second comparator 49 (that is, when Vin>V2> V1), the control unit 50 opens the opening / closing body 10a (for example, lowering of the power window: The drive of the motor body 14 is controlled so as to drive in the DOWN) direction.

  The motor circuit board 13 and the motor main body 14 form an integrated motor unit 60. The motor 61 accommodates the motor unit 60 inside a waterproof housing 62.

  The opening / closing body control device 10 according to the present embodiment has the above-described configuration. Next, the operation of the opening / closing body control device 10 will be described.

  The input voltage Vin applied to the non-inverting input terminals of the first comparator 48 and the second comparator 49 is, as shown in Table 1 below, when the switch circuit board 11 is not submerged and submerged, and when the first switch 21 is submerged. It changes according to the opening / closing of each of the second switches 23.

In Table 1 above, when the switch circuit board 11 is not submerged, it is set as shown in the above formula (1). Therefore, when the first switch 21 and the second switch 23 are opened (OFF), the first comparator 48 and A negative signal is output from the second comparator 49. As a result, the control unit 50 stops driving the motor body 14.
When the first switch 21 is closed (ON) and the second switch 23 is opened (OFF), a positive signal is output from the first comparator 48 and a negative signal is output from the second comparator 49. Thereby, the control part 50 controls the drive of the motor main body 14 so that the opening-and-closing body 10a may be driven in a closed (for example, ascending power window: UP) direction.
When the first switch 21 is opened (OFF) and the second switch 23 is closed (ON), positive signals are output from the first comparator 48 and the second comparator 49. Thereby, the control part 50 controls the drive of the motor main body 14 so that the opening-and-closing body 10a may be driven to open (for example, descent | fall of a power window: DOWN).

In Table 1 above, when the switch circuit board 11 is submerged, it is set as shown in the above equation (2). Therefore, when the first switch 21 and the second switch 23 are opened (OFF), the first comparator 48 and the first comparator 48 are set. 2 A negative signal is output from the comparator 49. As a result, the control unit 50 stops driving the motor body 14.
When at least one of the first switch 21 and the second switch 23 is closed (ON), a positive signal is output from the first comparator 48 and the second comparator 49. Thereby, the control part 50 controls the drive of the motor main body 14 so that the opening-and-closing body 10a may be driven to open (for example, descent | fall of a power window: DOWN).

As described above, according to the opening / closing body control apparatus 10 according to the present embodiment, the current flowing through the connection of the first switch 21 or the second switch 23 is biased at the time of being flooded or submerged. Compared to the case where the resistance value is detected, stable determination can be performed regardless of the aging of the pair of electrodes 25a and 25b. As a result, the motor main body 14 can be reliably driven in the opening direction when it is detected that the water has been submerged or submerged.
Further, since the bias constant current circuit 26 is connected in series to the submergence detection unit 25 and connected in parallel with the first and second switches 21 and 23, the driving direction of the motor body 14 (that is, the opening of the opening / closing body 10a) is provided. It is possible to prevent an increase in the cost required for the circuit configuration without having to provide two systems of comparators for determination of the direction and the closed direction) and for detection of flooding and submergence.

Further, even when the motor unit 60 has a waterproof structure, it is possible to reliably detect flooding and submergence, and the switch circuit board 11 and the motor circuit board 13 are connected using the existing connector 12. Therefore, it is possible to prevent the cost required for the circuit configuration from increasing.
Furthermore, since the opening / closing body 10a is driven in the opening direction only when the flooding or submergence is detected and the first switch 21 or the second switch 23 is operated, the opening / closing body 10a is not intended by the operator. Can be prevented from being driven. Further, when the first switch 21 or the second switch 23 is operated, the opening / closing body 10a can be driven in the opening direction that is always on the safe side.

  In the above-described embodiment, each resistor is not limited to a fixed resistor, but may be another device applicable as an impedance component, such as a field effect transistor or a diode. The resistors are the first resistor 22, the second resistor 24, the two resistors (Ra, Rb) 33, 34, and the first to third reference resistors (R1-R3) 43-45, respectively.

In the above-described embodiment, the bias constant current circuit 26 is a so-called feedback type constant current circuit, but is not limited thereto.
The bias constant current circuit 26 of the modification of the embodiment may be a so-called current mirror type constant current circuit as shown in any of FIGS.

  For example, the first bias constant current circuit 26 shown in FIG. 3A includes two npn transistors (Qa, Qb) 31, 32 and two resistors (Ra, Rb) 33, 34. The collector of one npn transistor (Qa) 31 is connected to a power supply 41 (described later) via an electrode 25a of the submergence detection unit 25 and connected to the bases of the two npn transistors (Qa, Qb) 31, 32. Has been. The bases of the two npn transistors (Qa, Qb) 31, 32 are connected. The emitters of the two npn transistors (Qa, Qb) 31, 32 are grounded via the two resistors (Ra, Rb) 33, 34, respectively. The collector of the other npn transistor 32 is connected to the electrode 25 b of the submergence detection unit 25.

  For example, a second bias constant current circuit 26 shown in FIG. 3B includes a resistor 71 and a diode 72 instead of one npn transistor (Qa) 31 in the first bias constant current circuit 26 shown in FIG. It has. The resistor 71 is connected to the anode of the diode 72, and the resistor (Rb) 34 is connected to the cathode of the diode 72. The base of the other npn transistor (Qb) 32 is connected to the anode of the diode 72.

For example, the third bias constant current circuit 26 shown in FIG. 3C includes a diode 73 instead of the resistor (Ra) 33 in the second bias constant current circuit 26 shown in FIG. The cathode of the diode 73 is grounded.
For example, the fourth bias constant current circuit 26 shown in FIG. 3D includes a resistor 74 instead of the two diodes 72 and 73 in the third bias constant current circuit 26 shown in FIG.

  The embodiments of the present invention are presented as examples and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are also included in the invention described in the claims and the equivalents thereof.

  DESCRIPTION OF SYMBOLS 10 ... Opening / closing body control apparatus, 10a ... Opening / closing body, 12 ... Connector, 14 ... Motor main body, 21 ... 1st switch (operation switch), 23 ... 2nd switch (operation switch), 13 ... Motor circuit board, 25 ... Submerged Detection unit (detection unit), 25a, 25b ... electrode, 26 ... bias constant current circuit (bias means, constant current source), 41 ... power source (constant current source), 48 ... first comparator (comparator), 49 ... second Comparator (comparator), 60 ..., motor unit, 61 ... motor, 62 ... casing

Claims (5)

A motor for driving an opening / closing body mounted on the vehicle in a driving direction of an opening direction and a closing direction;
An operation switch for operating the driving direction of the motor by switching a plurality of contacts;
A motor circuit board on which a circuit for determining the driving direction and driving the motor by a difference in resistance value connected to each of the plurality of contacts is mounted;
A detection unit for detecting flooding or submergence;
Bias means for passing a predetermined current through the circuit so as to drive the motor in the opening direction regardless of the difference in the resistance value when the detection unit detects flooding or submersion;
Comprising
The opening / closing body control apparatus characterized by the above-mentioned. The detection unit includes a plurality of electrodes that are conductive by being submerged or submerged,
The bias unit includes a constant current source that supplies the predetermined current between the plurality of electrodes when the plurality of electrodes are conductive.
The detection unit and the bias means are connected in parallel with the plurality of contacts of the operation switch.
The opening / closing body control apparatus of Claim 1 characterized by the above-mentioned. The motor includes a motor unit in which a motor body and the motor circuit board are integrated,
The motor unit includes a sealed waterproof housing.
The detection unit is provided in a non-waterproof portion of a switch circuit board on which the plurality of contacts of the operation switch are mounted,
A connector for connecting the motor circuit board and the switch circuit board;
The opening / closing body control apparatus of Claim 1 or Claim 2 characterized by the above-mentioned. The circuit includes a plurality of comparators having different reference voltages for determining the opening direction and the closing direction,
The reference voltage of the comparator that performs the determination of the opening direction is set higher than the reference voltage of the comparator that performs the determination of the closing direction;
The current value and the resistance value of the bias unit output a voltage lower than the reference voltage of the comparator that performs the determination of the closing direction when the detection unit detects water flooding or submersion, and When the detection unit detects flooding or submergence and the operation switch is operated, a voltage equal to or higher than the reference voltage of the comparator that performs the determination of the opening direction regardless of the difference in the resistance value is output. Set,
The opening / closing body control device according to any one of claims 1 to 3, wherein The opening / closing body is a power window,
The operation switch is a power window switch for operating opening and closing of the power window,
The opening / closing body control apparatus according to any one of claims 1 to 4, wherein the opening / closing body control apparatus is provided.

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