JPH04132179U - Power window device control circuit - Google Patents

Abstract

(57) [Summary] [Purpose] To obtain a control circuit that immediately stops when a manual operation switch is operated during automatic operation of either lifting or lowering. [Structure] A motor drive circuit 1 that drives a motor in a predetermined direction in response to a closing signal from one contact of one of the manual operation switches for lifting and lowering, and a motor drive circuit 1 that drives the motor in a predetermined direction after receiving a closing signal from one of the manual operation switches. Auto circuit 2 that maintains the operation of the motor and stops the motor.
and a manual reset circuit 4 for canceling the auto circuit in response to a reset signal from one of the manual operation switches, and a timer for setting the time for the manual operation switch to function as a reset switch after the self-hold release, and at the same time timing up. It is equipped with a timer circuit 5 that performs the following steps.

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 openings There is one operation switch each for up operation and down operation. When you operate one of the operation switches once (press and release), the motor as the drive source starts and moves the window glass in the up or down direction. This movement If you operate (press and release) any operation switch again during operation, the motor will stop. to 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 is possible. When the switch is pressed, the motor is energized to raise and lower the window glass. , in automatic operation, the motor will move until the window glass is fully open or fully closed. is energized and the load on the motor is applied when the window glass rushes into the blade. Therefore, it is possible to detect an increase in the amount of motor current and cut off the power to the motor after a predetermined period of time. There is.

[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 instantly. Also, If you want to open or close the window glass to an appropriate position, first You can move the switch away from the switch, but in the end the window glass is still moving. The problem with this is that you have to be careful about the position of the window glass, making it difficult to operate. was there.

[0006] In addition, in the latter 2) conventional circuit, when the window glass is automatically operated, To release the switch, perform manual operation on the opposite side, so it may temporarily be in the reverse operation state. The window glass does not stop at the desired position. Also, by mistake, now The problem is that if you operate the machine in the direction it is moving, it will not stop and is very dangerous. there were.

[0007] This idea was made in order to solve the conventional problems as mentioned above. By reducing the number of units, we aim to reduce costs and improve reliability, while also providing excellent operability, texture, and safety. The purpose of this invention is to obtain a control circuit for a power window device with improved performance.

[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 It is activated by receiving the closing signal of the switching element and conducts to the switching element. Any of the above manual operation switches and automatic operation switches by supplying a signal The operation of the motor is maintained even after the motor is opened, and the amount of current flowing through the motor is greater than the specified value. By receiving a detection signal from a current value detection circuit that detects that the an auto circuit that stops the motor by making the switching element non-conductive; The operation of the auto circuit is reset in response to the closing signal of one of the manual operation switches. The manual reset circuit to reset and the manual reset circuit to reset the auto circuit. A timer setting that sets the time for the reset switch to function as a reset switch. and the manually operated switch provides a closing signal to the motor drive circuit. and a two-contact connection that supplies a reset signal to the manual reset circuit. and the auto-operating switch supplies a closing signal to the auto-circuit. and a two-contact interlocking switch that also forms a capacitor discharge path for the timer circuit. It is characterized by

[0009]

[Effect]

The control circuit for the power window device in this invention is a two-contact interlocking switch. In response to a closing signal from the closing of one contact of a manual operation switch for a certain lift. Manual operation for lowering, which is a conductive switching element and a 2-contact interlocking switch. A switching element that conducts in response to a closing signal when one contact of a switch is closed. is excited by the conduction of the switching element, switches the motor circuit, and places the motor in its place. Drive in a fixed direction with a motor drive circuit, and press one of the manual operation switches mentioned above. After receiving the closing signal, the automatic operation switch for rising, which is a two-contact interlocking switch, Automatic operation signal by closing one contact or lowering by 2-contact interlocking switch By receiving an auto operation signal by closing one contact of the auto operation switch , an auto circuit supplies a conductive signal to the switching element to connect any of the manual The operation of the motor is maintained even after the automatic operation switch and auto operation switch are opened. and a current value detection circuit that detects when the amount of current flowing through the motor exceeds a specified value. The switching element is made non-conductive by receiving a detection signal from the motor. The motor is stopped, and during the auto operation, one of the manual operation switches is turned on. Manual operation of the auto circuit in response to a reset signal from the closing of the other contact By releasing the reset circuit, the automatic operation is stopped immediately and the window is closed. Make sure to stop the glass at any predetermined position, and then restart the manual operation step from this release. A timer circuit is used to set the time for the switch to function as a reset switch, and the By forming a capacitor discharge path by closing the other contact of the switch, the To instantaneously time up a timer circuit.

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.

[0011] 2, the window is opened following the closing operation of manual operation switch SW1 or SW2. Auto operation switch SW3 for raising the window glass or auto operation switch SW3 for lowering the window glass. By closing the switch SW4, the manual operation switches SW1 and SW 2 and the auto operation switches SW3 and SW4 are opened. Or an auto circuit that supplies a conduction signal to TR2 to maintain the motor M in the operating state. (self-holding circuit). This auto circuit 2 connects one input terminal to the inverter IN. V1 and the collector of the transistor TR1 and the capacitor C via the resistor R5. Connect to the power supply end of 1 and connect the other input terminal to auto operation switch SW3 (SW4). The connected NAND gate NAND1 and one input terminal are connected to the inverter INV2 and the resistor. The collector of the transistor TR2 and the power supply of the capacitor C2 are connected through resistor R6. Connected to one end and the other input terminal connected to auto operation switch SW3 (SW4). NAND gate NAND2, and one input terminal of the above NAND gate NAND1,N Input the output signal of AND2 through inverters INV3 and INV4 and input the other input. A current that detects the magnitude of the current flowing through the motor M at the terminal as a voltage drop across the resistor R7. AND gates AND1 and AND2 which input the output signal of the detection circuit 3, and this amplifier The output terminals of the gates AND1 and AND2 and the bases of the transistors TR1 and TR2 are connected to each other. resistors R8 and R9 connecting between the ground and the NAND gates NAND1 and NAND2. The connection path between the input terminals of one side and the output terminals of the inverters INV3 and IND4 Self-holding (by closing auto operation switch SW3 (SW4) connected between NAND gates NAND1, NAND2, inverters INV3, INV changed due to with diodes D3 and D4 for maintaining the potential of the output terminal of 4 in its changing state. It is configured.

0012 4 is an automatic circuit by closing manual operation switches SW1 and SW2. This is a manual reset circuit that resets the operation of step 2. The cutout circuit 4 connects a diode between one input terminal of AND gates AND1 and AND2. Voltage dividing resistors R10 and R11 connected via D5 and D6, and the diodes D5 and Cathode of D6 and second contact SW1-b of manual operation switches SW1 and SW2 , SW2-b, capacitors C3 and C4, and inverter I connected in series in sequence. It is composed of NV5, INV6, and resistors R12 and R13.

[0013] 5 is a set/reset signal output circuit, and this circuit 5 has a number on one input terminal. Connect the output terminal of the gate NAND1 to the other input terminal of the inverter INV5. NAND gate NAND3 with input terminal connected, and NAND gate NAND3 with one input terminal connected. Connect the output terminal of AND3 and connect the output terminal of the above inverter INV5 to the other input terminal. It is composed of a NAND gate NAND4 with a child connected thereto.

[0014] 6 is a memory circuit that stores the auto-up operation, and this circuit 6 is the memory circuit that stores the auto-up operation. The power supply path is connected via the output terminals of NAND3 and NAND4 and resistors R14 and R15. It has a pair of NAND gates NAND5 and NAND6 with 7 connected to one input terminal. Then, connect the other input terminal of NAND5 to which diode D8 is connected to NAND6. Connect the other input terminal of this NAND6 to the output terminal of NAND5 to the output terminal. The configuration is as follows.

[0015] 8: 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 8 is connected to the protection circuit 9 via base resistors R16, R22 and diodes D8, D9. The conduction between the transistor TR3 and this transistor TR3 causes the resistor R17 to A capacitor C5 is charged through the capacitor C5, and a resistor R1 is connected to the charging end of the capacitor C5. The inverter connected to the power supply end side of the manual operation switches SW1 and SW2 via 8 The capacitor INV7 is connected in series with the resistor R19 and connected in parallel with the capacitor C5. transistor TR4, and the base of this transistor TR4 is connected to the NAND gate N. It consists of a base resistor R20 connected to the output terminal of AND6.

[0016] The above protection circuit 9 is a circuit for supplying a stable voltage to the load even if the power supply voltage fluctuates. This circuit 9 consists of a diode D7, a resistor R21, and a capacitor connected in series. C6 and a Zener diode ZD connected in parallel with this capacitor C6. The power supply path 7 is connected to the output terminal. Then, connect the resistor R21 directly. It is connected to the voltage dividing point of the contact current detection circuit 3 and voltage dividing resistors R10 and R11.

[0017] Note that the manual operation switches SW1 and SW2 are the triggers of the motor drive circuit 1. First contacts SW1-a, SW2- that supply conduction signals to transistors TR1, TR2 connected in series with a and resistors R3 and R4 and sends a reset signal to the manual reset circuit 4. It is a two-contact interlocking switch that has second contacts SW1-b and SW2-b that supply . In addition, the above auto operation switches SW3 and SW4 send an auto operation signal to the auto circuit 2. The first contact SW3-a, Sw4-a that supplies the signal and the capacitor discharge of the timer circuit 8 A two-contact interlocking switch with second contacts SW3-b and SW4-b forming an electric path. Yes, especially the contact SW3- which supplies the auto operation signal of the auto operation switch SW3. Resistors R23 and R24 are connected in series to a.

[0018] Next, the operation of the configuration of the above embodiment will be explained.

[0019] (Manual operation) In the initial state, now close the manual operation switch SW1 for lifting. When the first contact SW1-a is closed, the transistor TR1 becomes conductive. A current flows in the direction of the arrow to the coil of relay RL1 through the star, and the contact of relay RL1 is The point turns ON as shown. As a result, current flows through motor M in the direction of the solid arrow. The motor will start operating, and by keeping the manual operation switch SW1 pressed, the motor will start operating. The window crow continues its upward movement. At this time, by closing the second contact SW1-b, A reset signal is supplied to the manual reset circuit 4, but the auto circuit 2 Since it is not operating, there is no change in the circuit.

[0020] Also, contrary to the above, when 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.

[0021] The above is manual operation.

[0022] (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).

[0023] Therefore, as shown in FIG. 2, after turning on manual operation SW1 as described above, is the output of the inverter INV1 of the auto circuit 2 due to the conduction of the transistor TR1. The potential of the power terminal becomes H. When auto operation switch SW3 is closed in this state, By closing the first contact SW3-a, the inverter INV1 and the NAND gate NAND 1. The potential of the input/output terminal of inverter INV3 changes from Figure 1 to Figure 2, and this Even after the auto operation switch SW3 is opened, the potential state of the diode D3 remains unchanged. It is held in a back-up system. As a result, the potential of both input terminals of the AND gate AND1 is becomes H, and the first contact SW1-a of the manual operation switch SW1 is closed. By supplying a conduction signal to the base of the transistor TR1, which has become more conductive, the above manual Remains conductive even after the auto operation switch SW1 and auto operation switch SW3 are opened. Then, the motor M continues to drive, and the window glass moves up to the fully closed position. continue.

[0024] In this case, the NAND gate NAND of the auto operation memory set and reset circuit 5 3. The potential of the input and output terminals of NAND4 changes from Figure 1 to Figure 2, and as a result, When the series of auto-up operations is completed, the NAND gate NA of the memory circuit 6 The potential of the output terminal of ND6 becomes L, and the automatic operation is memorized. child The memory status of switches SW1, SW2, and SW other than auto operation switch SW3 4 is closed and manually reset, or current detection circuit 3 cancels automatic operation. This continues until the signal is output. At this time, the transistor TR3 of the timer circuit 5 is conductive. The transistor TR4 becomes non-conductive, and the capacitor C5 becomes connected to the resistor R17 and the transistor It is charged to a predetermined potential via star TR3.

[0025] In addition, after closing the manual operation switch SW2, the automatic operation switch SW2 is closed. 4 is closed, the same operation as above causes current to flow in the opposite direction to motor M. , the window glass continues its downward movement until it reaches the fully open position.

[0026] (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 switch SW1 or SW2 is closed, the second contact SW1-b or The capacitor of manual reset circuit 4 is activated by the reset signal caused by closing SW2-b. A negative trigger signal generated by the charge in the circuit C3 or C4 triggers the auto circuit 2. The signal is applied to one input terminal of the gate AND1. For this reason, and The potential of the output terminal of the transistor TR1 becomes L, making the transistor TR1 non-conductive. As a result, relay RL1 becomes inactive, stopping motor M and closing the window glass. Immediately stop the rising movement of the base.

[0027] (Reverse auto operation during auto operation) On the other hand, in order to perform the opposite lowering operation when the window glass is automatically raised, Close the auto operation switch SW4 after closing the manual operation switch SW2. Then, by closing the second contact SW4-b of this auto operation switch SW4, the controller is turned on. Forms a capacitor discharge path and instantly discharges the charge in the capacitor C5 of the timer circuit 5. do. Therefore, the output potential of inverter INV7 instantly becomes H, and the reverse side immediately Automatic operation.

[0028] (Auto operation error) To stop auto-up operation or perform the opposite auto-down operation If you close the manual operation switch SW1 for raising by mistake, The operation of manual reset circuit 4 resets auto circuit 2 and stops motor M. let However, the potential of the output terminal of the NAND gate NAND6 of the memory circuit 6 is H. Since the voltage remains unchanged, the transistor TR4 does not conduct. As a result, the ascent ma- Even if the manual operation switch SW1 continues to be closed, the timer circuit 5 will continue to time up. It is therefore safe without having to restart the motor.

[0029] (Operation of timer circuit) Manual operation for either raising or lowering as shown above during automatic operation When either switch SW1 or SW2 is closed, the manual reset circuit described above is activated. 4, the auto circuit 2 is reset and the motor M is stopped. And oh Due to potential changes at the output terminal of NAND gate NAND1 or NAND2 of gate circuit 2, Then, the transistor TR3 of the timer circuit 5 becomes non-conductive and the automatic operation memory is activated. By the operation of the set-reset circuit 5, the NAND gate NAND6 of the memory circuit 6 is activated. The potential of the output terminal changes to H. As a result, the transistor TR4 of the timer circuit 5 becomes conductive, and the charge in capacitor C5 passes through resistor R19 and transistor TR4. Manual operation switch Regardless of whether SW1 or SW2 is closed, transistors TR1 and TR2 are closed. It also doesn't conduct. Therefore, the window glass will stop at a predetermined position. So Then, the manual operation switch SW1 is turned on until the timer circuit 5 is typed up. Or, if SW2 is kept closed, it will automatically shift to manual operation. .

[0030] (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 voltage drop across resistor R7 increases as the load on the motor increases, the voltage drop across resistor R7 increases. Upon detection, the potential of the output terminal of the current detection circuit 3 becomes L. As a result, auto circuit 2 The outputs of the AND gates AND1 and AND2 become L, and the transistors TR1, TR2 becomes non-conductive and motor M stops.

[0031]

[Effect of the idea]

As described above, according to this invention, the reset for the manual reset circuit The capacitor discharge path of the signal and timer circuit is connected to a manual switch, which is a two-contact interlocking switch. Since it is obtained from the contacts of the automatic operation switch and the automatic operation switch, It is possible to have a simple circuit configuration with a considerable number of parts, reducing costs and improving reliability. You can improve your performance. Also, when the window glass is automatically operated, it will not go up or down. By closing the manual operation switch, the automatic operation is canceled and the corresponding manual operation switch is closed. The window glass can be reliably stopped at any predetermined position, and it has excellent operability and texture. It is excellent in terms of safety and provides effects such as improved safety.

[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 Auto circuit 3 Current detection circuit 4 Manual reset circuit 5 Timer circuit SW1, SW2 Manual operation switch SW3, SW4 Auto operation switch

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. It is activated by receiving a switch closing signal and supplies a conduction signal to the switching element to maintain the operation of the motor even after opening of either the manual operation switch or the automatic operation switch, and to control the amount of current flowing through the motor. an automatic circuit that disconnects the switching element and stops the motor upon receiving a detection signal from a current value detection circuit that detects that the current value has exceeded a specified value; The manual reset circuit includes a manual reset circuit that receives a signal and resets the operation of the auto circuit, and a timer circuit that sets a time period for the manual operation switch to function as a reset switch after the auto circuit is reset, and the manual operation switch is configured to reset the operation of the motor. The automatic operation switch is a two-contact interlocking switch that supplies a closing signal to the drive circuit and a reset signal to the manual reset circuit, and the auto operation switch supplies the closing signal of the auto circuit and also controls the capacitor discharge path of the timer circuit. A control circuit for a power window device, characterized in that it is a two-contact interlocking switch.