JPH04123810U - Power window device control circuit - Google Patents

Abstract

(57) [Summary] [Purpose] To stop the automatic operation immediately even if the manual operation switch for lifting or lowering is operated. [Structure] A motor drive circuit 1 that drives a motor in a predetermined direction upon receiving a closing signal of one of the manual operation switches for lifting and lowering; a self-holding circuit 2 that operates upon receiving a closing signal of an operation switch and maintains the operating state; and a self-holding circuit 2 that maintains the operation of the motor upon receiving an operating signal of the self-holding circuit and reduces the amount of current flowing through the motor. A motor drive control circuit 3 that stops the motor upon receiving a detection signal exceeding a specified value; and a reset circuit 5 that releases the self-holding of the self-holding circuit upon receiving a closing signal of any of the manual operation switches.
and a timer circuit 6 for setting the time from when the self-holding is released to when the manual operation switch functions as a reset switch. [Effect] During automatic operation, automatic operation can be stopped by operating either the manual operation switch for lifting or lowering, providing excellent operability, texture, and safety.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This idea automatically raises and lowers the window glass by rotating a motor in the forward or reverse direction. The present invention relates to a control circuit suitable for a power window device of a moving vehicle.

0002

[Conventional technology]

Conventional control circuits of this type include, for example, (1) As shown in Japanese Patent Application Laid-Open No. 61-294081, window glass There is one operation switch for up operation and one down operation, and this If you operate one of the operation switches once (press and release), the motor as a drive source will switch on. The controller is activated and moves the window glass in the up or down direction. this If you operate (press and release) any operation switch again during operation, the motor will stop. stop and lock the window glass in that position. This is considered a manual operation.

0003 On the other hand, unless the operation switch is operated again, the window glass will continue to operate. automatically stops the motor in the fully open or fully closed position. This is called automatic operation. There is something to do.

0004 (2) Also, as shown in Japanese Utility Model Publication No. 15504/1983, manual operation In this case, the motor is energized while the switch is pressed to raise and lower the window glass. In automatic operation, the motor will move to the fully open or fully closed position of the window glass. The load on the motor when the window glass rushes into the blade. detects an increase in motor current and cuts off power to the motor after a predetermined period of time. There is something.

[0005]

[Problem that the idea aims to solve]

The control circuit of a conventional power window device is configured as described above. In the former (1) conventional circuit, for example, if you want to open the window glass slightly, You have to press and release the switch twice in an instant. Also, If you want to open or close the window glass to an appropriate position, first You can take your hand off the switch, but in the end the window glass is still moving. Inside, you have to be careful about the position of the window glass, making it difficult to operate. There was a problem.

[0006] In addition, in the latter (2) conventional circuit, when the window glass is automatically operated, Auto release requires manual operation on the opposite side, so it may temporarily be in a reverse operation state. The window glass does not stop at the desired position. Also, by mistake The issue is that if you operate in the direction in which it is currently moving, it will not stop and is extremely dangerous. was there.

[0007] This idea was made to solve the conventional problems mentioned above, and it improved operability. To obtain a control circuit for a power window device with excellent texture and improved safety. With the goal.

[0008]

[Means to solve the problem]

The control circuit of the power window device according to this invention has manual operation for raising. Switching element that conducts in response to switch closing signal and manual for lowering A switching element that becomes conductive in response to a closing signal of an operating switch, and the switching element. It is excited by the conduction of the child and switches the motor circuit to drive the motor in a predetermined direction. A motor drive circuit with a relay and the closing of any of the above manual operation switches. After receiving the completion signal, the close signal of the auto operation switch for ascending or the auto operation switch for descending is A self-protection system that operates and maintains the operating state when it receives the closing signal of the operating switch. the switching element by receiving the activation signal of the self-holding circuit and the self-holding circuit; A conductive signal is supplied to the motor to maintain the operation of the motor, and the amount of conductivity of the motor is It receives a detection signal from the current value detection circuit that detects that the current value has exceeded the specified value. A motor drive that causes the switching element to become non-conductive and stops the motor. a control circuit, and the said automatic switch receives a closing signal from one of the manual operation switches. a reset circuit that releases the self-holding of the self-holding circuit; and a reset circuit that releases the self-holding of the self-holding circuit; A timer that sets the time for the manual operation switch to function as a reset switch. Equipped with a master circuit, one of the manual operation switches mentioned above is operated during auto operation. The automatic operation is stopped by doing so.

[0009]

[Effect]

The control circuit in this invention generates a closing signal for the manual operation switch for lifting. Closing signal for the switching element that receives and conducts and the manual operation switch for lowering The switching element becomes conductive when receiving a signal, and the switching element becomes energized by the conduction of the switching element. Then, the motor circuit is switched and the motor is driven in a predetermined direction by the motor drive circuit. Automatic operation for rising after receiving the closing signal of either manual operation switch Receiving the switch close signal or the auto operation switch close signal for lowering By keeping the self-holding circuit in the operating state and receiving this operating signal, the motor A drive control circuit supplies a conductive signal to the switching element to control one of the manifolds. The operation of the motor is maintained even after the dual operation switch is closed, and the motor is Receives a detection signal from the current value detection circuit that detects that the amount of current has exceeded the specified value. The motor is stopped by turning off the switching element and stopping the motor. The self-holding circuit receives a closing signal from one of the manual operation switches. The hold is released by the reset circuit, and from this self-hold release, the manual operation switch is activated. A timer circuit is used to set the time for the switch to function as a reset switch, allowing automatic operation. When the automatic operation is performed by operating one of the manual operation switches mentioned above. to immediately stop the window glass and securely stop it at an arbitrary predetermined position.

0010

【Example】

Hereinafter, embodiments of this invention will be described with reference to the drawings. In FIGS. 1 to 3, 1 is a motor drive circuit, and this motor drive circuit 1 is for raising the window glass. A switch with a manual operation switch SW1 connected to the base via a resistor R1. Transistor TR1 as a control element and manual operation for lowering the window glass. As a switching element, the operation switch SW2 is connected to the base via the resistor R2. is excited by the conduction between the transistor TR2 and the transistors TR1 and TR2. Relays RL1 and RL2 switch the motor circuit to drive motor M in a predetermined direction. Each excitation coil of the relays RL1 and RL2 is connected to a transistor TR1. , is connected in series with TR2, and the switching contact of this relay is inserted into the motor circuit. . In addition, diodes D1 and D2 are connected in parallel to the excitation coil. One end of each is connected to ground via capacitors C1 and C2. In addition, the top The manual operation switches SW1 and SW2 have contacts directly connected to ground. This is a two-contact interlocking switch.

[0011] 2 is a self-holding circuit, and this self-holding circuit 2 connects each of the two input terminals. Connected to the collectors of the transistors TR1 and TR2 via resistors R3 and R4. OR gate OR1, and connect the output terminal of the above OR gate OR1 to one input terminal with a resistor. Connected through R5, and the other input terminal has an automatic operation switch for raising the window glass. Connect switch SW3 and auto operation switch SW4 for lowering, and resistor R. NAND gate NAND1 connected to ground through 6, and NAND gate connected to the base Transistor TR3, which connects the output terminal of NAND1 via resistor R7, and this A diode D3 and a diode D3 connect the collector of the transistor TR3 to one end of the resistor R6. It consists of a capacitor C3 connected to ground. In addition, the above auto operation step Switches SW3 and SW4 are two-contact interlocking switches with contacts directly connected to ground. It is Chi.

0012 3 is a motor drive control circuit, and this motor drive control circuit 3 has the above-mentioned self-holding circuit. It is connected to the power supply terminal +B via the transistor TR3 of line 2 and the protection circuit 4. A voltage divider circuit of resistors R8 and R9, and an au pair with an inverting input terminal connected to this voltage divider circuit. The output terminals of the operational amplifiers OP1 and OP2 and the operational amplifiers OP1 and OP2 are connected to transistors. Connect to the resistors R10 and R11 connected to the bases of the transistors TR1 and TR2 and to the ground. The resistors R12 and R13 and the non-inverting input terminals of the operational amplifiers OP1 and OP2 are connected to each other. It consists of diodes D4 and D5 connected to the collectors of transistors TR2 and TR1. It is.

[0013] 5 is a reset circuit that cancels the self-holding of the self-holding circuit 2; Circuit 5 connects one input terminal to the output circuit of protection circuit 4 via resistor R14, and The other input terminal is connected to the ground contact of manual operation switches SW1 and SW2. NAND gate NAND2 and the above NAND via capacitor C4 to one input terminal. Connect the output terminal of gate NAND2 and connect it to ground via resistor R15. Connect one end of the auto operation switch SW2, SW4 to the other input terminal. The above self-protection is applied to the NAND gate NAND3 and the output terminal of this NAND gate NAND3. The output terminal of OR gate OR1 of holding circuit 2 and the input of NAND gate NAND1 It consists of a diode D6 connected to the terminal.

[0014] 6: After canceling auto operation, reset manual operation switches SW1 and SW2. This is a timer circuit that sets the time to function as a switch, and this timer circuit 6 is the output terminal of the NAND gate NAND1 of the self-holding circuit 2 through the resistor R16. and the collector of this transistor TR4. resistor R17 and capacitor C5 connected in series between ground, and the connection point between the two. Connect P to the ground contact of auto operation switches SW3 and SW4, and also connect The resistor R18 connected between the point and the ground, and the above connection point P are connected to one side through the resistor R19. and the other input terminal is connected to the output circuit of the protection circuit 4 through a resistor 20. Nand with the output terminals connected to the manual operation switches SW1 and SW2. Capacitor C connected between gate NAND4, output circuit of protection circuit 4, and ground It consists of 6.

[0015] 7 detects the magnitude of the current flowing through the motor M as a voltage drop across the resistor R21, This current detection circuit compares with the reference signal from the reference signal generation circuit 8. Output circuit 7 is connected in series with OR amplifiers OP3 and OP4 and the output terminal of this operational amplifier OP3. The resistor R22 and diode D7 connected to the reference signal generating circuit 8 and the operational amplifier Connect the resistor R23 between the output terminal of OP3 and the output terminal of the operational amplifier OP4. A transistor TR5 connected to the base via resistor R24 and this transistor T A resistor R25 connected between the collector of R5 and the anode end of the diode, It consists of resistor R21 and resistor R28 connected between one input terminal of operational amplifier OP3. has been completed.

[0016] 9 outputs the output signal after a predetermined delay time after receiving the output signal from the current detection circuit 7. This timer circuit 9 is a timer circuit that charges the output signal of the current detection circuit 7. The capacitor C7 and the charging end of the capacitor are connected to the operational amplifier of the motor drive control circuit 3. It consists of resistors R26 and R27 connected to the inverting input terminals of OP1 and OP2. Ru.

[0017] Next, the operation of the configuration of the above embodiment will be explained.

[0018] (Manual operation) In the initial state, now close the manual operation switch SW1 for lifting. , the transistor TR1 becomes conductive and the coil of the relay RL1 is connected through the transistor. A current flows in the direction of the arrow, and the contacts of relay RL1 are turned on as shown. to this As a result, current flows to the motor M in the direction of the solid line arrow, and the motor operates, causing manual operation. By continuing to press the operation switch SW1, the window glass continues to move upward. . Also, contrary to the above, if the manual operation switch SW2 for lowering is closed, , current flows through motor M in the direction of the dotted arrow, causing the motor to rotate in the opposite direction, resulting in manual operation. By continuing to press the operation switch SW2, the window glass continues to lower. Ru. The above is manual operation.

[0019] (Auto operation) The above manual operation switch SW1 (SW2) and auto operation switch SW3 ( SW4) has a two-stage action, and has been changed from manual operation to automatic operation. The order of switch operation when entering the post-stop state is SW1ON (closed) → SW3O. N (closed) → SW3OFF (opened) → SW1OFF (opened).

[0020] Therefore, as shown in FIG. 2, the manual operation switch SW1 is turned OFF as described above. After NAND, the potential of one input terminal of NAND gate NAND1 of self-holding circuit 2 becomes It becomes L. In this state, when the auto operation switch SW3 is closed, the The potential of the other input terminal of the gate NAND1 also becomes L. As a result, Nand Gate N The potential of the output terminal of AND1 becomes H, and the transistor with this potential as the base input The transistor TR3 becomes conductive, and the motor drive control circuit 3 is maintained through this transistor TR3. Connect to the output end of protection circuit 4. Therefore, from the motor drive control circuit 3 to the manual Conductive communication is established at the base of transistor TR1, which is turned on by closing operation switch SW1. A signal is supplied to keep the switch in conductive state even after the manual operation switch SW1 is opened. The motor M continues to drive, and the window glass continues to rise until it reaches the fully closed position. Let's go.

[0021] In addition, after closing the manual operation switch SW2, the automatic operation switch SW4 When closed, current flows in the opposite direction to motor M by the same operation as above, The window glass continues its downward movement until it reaches the fully open position.

[0022] (Manual cancellation of auto operation) During the above automatic operation, either the ascending or descending manual is activated as shown in Figure 3. When the alarm operation switch SW1 or SW2 is closed, the NAND gate of the reset circuit 5 is closed. The potential of the input terminal of gate NAND2 becomes L, and the potential of the output terminal of the NAND gate becomes L. becomes H, and the potentials of the input terminals of the NAND gate NAND3 all become H. The potential of the output terminal of the gate NAND3 becomes L. As a result, self-holding circuit 2 The potential of the input terminals of the NAND gate NAND1 becomes L, and the transistor Make TR3 non-conductive.

[0023] Therefore, the motor drive control circuit 3 is disconnected from the output terminal of the protection circuit 4 and becomes inoperable. , the conductive signal supplied to the base of transistor TR1 (TR2) is cut off, Deactivate relay RL1 (RL2) to open the motor circuit and stop motor M. immediately stop the window glass raising operation.

[0024] In this case, manual operation switches SW1 and SW2 are set to timer circuit 6. Acts as a reset switch for a limited time to ensure that the window glass remains in place. It can be stopped.

[0025] (Operation of timer circuit) Manual operation for either raising or lowering as shown above during automatic operation When the switch SW1 or SW2 is closed, the NAND gate of the self-holding circuit 2 is closed. As the potential of the output terminal of NAND3 becomes L, the voltage of transistor TR3 and The transistor TR4 of the timer circuit 6 also becomes non-conductive. As a result, capacitor C5 The charging charge is discharged through the resistor R18, and the period of time until this charging charge reaches a predetermined potential is Regardless of whether the manual operation switch SW1 or SW2 is closed, the transistor Both the terminals TR1 and TR2 are not conductive. Therefore, the window glass is in place. It will stop at .

[0026] In this case, the setting time manual operation switch SW1 of the timer circuit 6 or If SW2 continues to be closed, manual operation can be performed automatically.

[0027] (Reverse auto operation during auto operation) On the other hand, in order to perform the opposite auto-down operation during the auto-up operation, manual operation is required. When the automatic operation switch SW4 is closed after the automatic operation switch SW2 is closed, the above-mentioned switch is closed. The charge in the capacitor C5 of the timer circuit 6 is connected to the ground of the auto operation switch SW4. The voltage is instantly discharged through the point, and the potential of the output terminal of the NAND gate NAND4 becomes H. , the reverse side auto operation will occur immediately. Also, after a certain period of stoppage, the reverse side auto The operation may be started.

[0028] (Automatic stop of motor) Note that during automatic operation, the window glass is in the fully open or fully closed position, and the window glass is in the fully open or fully closed position. When the motor load increases and the voltage drop across resistor R38 increases, the voltage drop from the reference voltage generator increases. The potential of the output terminal 17 of the operational amplifier OP1 compared with the output reference voltage changes from H to L. Changes to Therefore, the charge on the capacitor C2 of the timer circuit 7 is as shown in FIG. Then, discharge occurs in the direction of the arrow through resistor R26, diode D7, and transistor TR2. After a predetermined delay time, the output terminal 21 of the operational amplifier OP3 of the relay drive control circuit The potential of changes from H to L, transistor TR2 becomes non-conductive, and motor M stops. do.

[0029] Therefore, the fully open or fully closed window glass can get into the blade and cause the motor to move. Even if the load on the motor M increases, it will not stop immediately, so the window glass will be fully closed. position or fully closed position is reached.

[0030]

[Effect of the idea]

As described above, according to this invention, when the window glass is automatically operated, Auto operation can be canceled by closing either manual operation switch. The window glass can be reliably stopped at any predetermined position, and operability is improved. It has excellent texture, improves safety, and other effects.

[Brief explanation of drawings]

FIG. 1 is a control circuit diagram in an initial state according to an embodiment of the invention.

FIG. 2 is a control circuit diagram during automatic operation according to an embodiment of the invention.

FIG. 3 is a control circuit diagram when manually canceling automatic operation according to an embodiment of the invention;

[Explanation of symbols]

1 Motor drive circuit 2 Self-holding circuit 3 Motor drive control circuit 5 Reset circuit 6 Timer circuit

Claims (1)

[Scope of utility model registration request] 1. A switching element that becomes conductive in response to a closing signal of a manual operation switch for ascending, a switching element that becomes conductive in response to a closing signal of a manual operation switch for descending, and a motor that is excited by the conduction of the switching elements. A motor drive circuit having a relay that switches the circuit to drive the motor in a predetermined direction, and a closing signal for an automatic operation switch for ascending or an automatic operation for descending after receiving a closing signal from one of the manual operation switches mentioned above. a self-holding circuit that operates upon receiving a switch closing signal to maintain the operating state; and a self-holding circuit that maintains the operating state by supplying a conduction signal to the switching element upon receiving the operating signal of the self-holding circuit, thereby maintaining the operation of the motor. and a motor drive control circuit that receives a detection signal from a current value detection circuit that detects that the amount of current flowing through the motor has exceeded a specified value, thereby making the switching element non-conductive and stopping the motor; a reset circuit that releases the self-holding of the self-holding circuit in response to a closing signal from one of the manual operation switches; and a timer circuit that sets a time period from when the self-holding is released for the manual operation switch to function as a reset switch. A control circuit for a power window device, characterized in that the automatic operation is stopped by operating one of the manual operation switches during automatic operation.