JPS6195180A - Automatic fifting and falling control apparatus of window glass - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to an automatic windshield lift control device that controls a reversible motor that opens and closes the windshield of an automobile, and particularly to an overcurrent necessary for the control. This invention relates to improvements in detection circuits.

[Conventional technology]

FIG. 8 is a circuit diagram of a conventional automatic windshield lift control device disclosed in, for example, Japanese Utility Model Publication No. 58-15584. In FIG. By passing a current in the direction, the window glass rotates in an upward direction, and by passing a current in a direction from the brush 1b to the brush 1a, the window glass rotates in a downward direction. Reference numeral 2 designates an operation switch, which consists of self-returning movable pieces SW1 and SW2 that interlock with each other.Movable piece SW+11 is a so-called one-touch type that automatically opens and closes in response to a temporary operation signal, and movable piece SW2 is not operated. It is a manual operation that opens and closes only when the door is closed. 3. This is an overcurrent detection circuit for detecting overcurrent of the motor 1, and R1 is a resistor interposed to convert current into voltage. 4 is a self-holding circuit; when relay RL+ is energized, motor 1 rotates upward; when relay RL2 is energized, motor 1 rotates downward.

The conventional automatic windshield lift control device is constructed as described above, with one-touch movable piece SW of operation switch 2.
1, relay RL+ or relay RL2 is energized and self-held by self-holding circuit 4, and motor 1
When a current flows through the motor 1, a voltage drop corresponding to the current flowing through the motor 1 occurs in the resistor RIK inserted in the current-carrying path of the motor 1. At this time, the comparator 3a of the overcurrent detection circuit 8 receives the reference voltage obtained by dividing the power supply voltage element B by the resistors R3 and R4 and inputs the voltage generated in the above-mentioned resistor R1 to the inverting input terminal. It is applied to the non-inverting input terminal through a filter circuit. The output of the above comparator 3a is set to resistors R1, R31R4 so that it becomes LO in normal operation, and HI when an overload current flows when the window glass is closed or opened.
is set, and the output of the comparator 3a is H.
I, transistor Tr5. Tr6 turns on and releases self-holding.

The purpose of the above-mentioned filter circuit consisting of the resistor R2 and the capacitor C1 is to absorb the ripple voltage generated in the resistor R1 at the time of startup.

[Problem that the invention seeks to solve]

In the conventional automatic windshield lift control device as described above, a filter circuit consisting of a resistor R2 and a capacitor C1 is used in the overcurrent detection circuit 8. There is a problem in that when a person's arm or the like is caught between them, there is a great risk of delay in stopping the motor 1. This is because the current that flows when the motor 1 is started is large, so in order to prevent malfunction of the comparator 3a interposed in the overcurrent detection circuit 3 due to this current, it is necessary to connect the resistor R2 and capacitor C1 with a sufficiently large time constant. This was a problem because it required a separate filter circuit.

This invention was made to solve these problems, and can prevent malfunctions when starting and reversing the motor, and also prevents a person's arm from being caught between the window glass and the window frame while the window glass is rising. The motor can be stopped without excessive force being applied and there is no delay even if the window glass is closed.

The purpose of this invention is to obtain an automatic windshield lift control device that can prevent overload when the windshield is turned off.

[Means for solving problems]

The automatic windshield lift control device according to the present invention does not use a filter circuit consisting of a resistor and a capacitor in the overcurrent detection circuit, and only receives a signal from the relay circuit that is generated according to the operation of the operation switch when the motor is started or reversed. The output of the above-mentioned overcurrent detection circuit is stopped by voltage.

[For production]

In this invention, since the overcurrent detection circuit can stop the output at the time of starting or reversing, the current when the windshield is normally raised or lowered, and the current between the windshield and the window frame while the windshield is raised, for example. The difference between the overload detection current and the overload detection current caused by a person's arm or the like being caught between them can be reduced, and the load applied to the person's arm or the like is reduced, reducing the danger.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. 1st
In the figure, reference numeral 1 denotes a reversible motor that raises and lowers the window glass. By passing current from the brush la to the brush 1b, the window glass rotates in the upward direction, and from the brush 1b to the brush 11 & By passing a current in this direction, the windshield rotates in a downward direction. 5 is a power supply, 6 is a manual operation switch, and 7 is a one-touch operation switch, each of which can be operated independently, with movable contacts 5a and 7m that self-tighten to the neutral position when released, and a fixed position for lifting. Contact 6
b, 7b, and lowering fixed contacts 60° and 70.

Reference numeral 8 denotes an overcurrent detection circuit, which detects the current flowing to the motor 1. For example, when a person's arm or the like is caught between the window glass and the window frame while the window glass is rising, the current flowing to the motor 1 is detected. When the value exceeds a predetermined value, the relay circuit 8 described later
A signal is supplied to stop the motor 1 mentioned above. The above-mentioned overcurrent detection circuit 3 includes resistors Rl, R5, and a comparator 3a.
, capacitor c1. c2 and diodes Di and D4, R1 is a resistor that converts current to voltage, R2 is a protective resistor kR4 of the comparator 8a, and R5 is a resistor that provides a reference voltage to the inverting input terminal of the comparator 3m. , Dl , D2 , R3, C3, D3 , D
4 is a circuit for increasing the input voltage at the inverting input terminal - of the comparator 3a only when the motor 1 is started. In addition,
C2 is a protection capacitor, and the above capacitor C1
This is a more reasonable value. 8 is a relay circuit;
R8 flip-flop 8a for raising the windshield;
The falling RS flip-flop 8b, the transistors Trl and Tr2 that are turned on by the outputs of the RS flip-flops 8a and 8b, and the transistors Tri and T
When r2 is turned on, relay RL1. RL2 and
Operation signal generation circuit 8C generates a rise/fall/stop signal according to the state of the operation switch 6.7 and inputs the signal to the RS flip-flops 8a and 9b.
It is composed of.

The above-described operation signal generation circuit 8o includes diodes D5, D6, D7, and DB that separate signals from the manual operation switch 6 and the one-touch operation switch 7, resistors R6 and R7, a capacitor C8, and a capacitor C8 that generate a rising differential wave signal.
Diode D9, resistors R3, R9, capacitor C4, diode DIO that generate a descending differential wave signal, transistor Tr3, resistors RIO, R1 that generate a stop differential wave signal when the manual operation switch 6 is turned off.
1. Capacitor C5 working diodes Dll, Dl2 and the above-mentioned RS flip-flop 8 m + 8 b to prevent the input signal from going around, and when a rising signal is input to the rising RS flip-flop 8a, a stop signal is sent to the falling RS flip-flop 8b. , and diodes D13 and D for giving a stop signal to the rising R8 flip-flop 8a when a falling signal is input to the falling R8 flip-flop 8b.
l4. Dl5. Dl6, capacitors C6 and C7 for preventing malfunction due to disturbance noise, and a diode 017 for preventing a stop signal from being input to the overcurrent detection circuit 3.

In the automatic windshield lift control device configured as described above, the operations of the operation switch 6.7 and the relay circuit 8 will be explained first. When the movable contact 6a of the manual operation switch 6 is closed to the rising fixed contact 6b side, the falling differential wave signal generating circuit connects the set terminal S of the rising R8 flip-flop 8a and the falling R8 flip-flop 8.
A signal is given to the reset terminal R of the transistor T
ri is turned on and relay RL1 operates. When the relay RL operates, the motor IT rotates in a direction to raise the windshield. At this time, the transistor Tr3 is in the on state Kl.
Since the collector voltage of is close to zero, when the manual operation switch 6 is returned to the neutral position, the transistor Tr3 is turned off and a differential wave signal for stopping is generated and the reset terminals of the rising and falling RS flip-flops 9m and 9b are generated. R.K.
The signal is applied, the transistor Trl turns off, and the flow t to the p motor 1 is stopped. Also.

When the movable contact 6a of the manual operation switch 6 is closed to the lowering fixed contact 6c, the set terminal S of the lowering RS flip-flop 8b and the reset terminal RK signal of the lowering RS flip-flop 8a are applied, contrary to the raising one. The transistor Tr'l is turned on, the relay RL2 is operated, and the motor 1 is rotated in a direction to lower the window glass. Then, when the manual operation switch 6 is returned to the neutral position, the upper row and lowering RS flip-flops 8a
.

A signal is applied to the reset terminal R of the motor 8b, and the power supply to the motor 1 is stopped in the same manner as described above.

Next, when the movable contact 7a of the one-touch operation switch 7 is closed to the rising fixed contact 7b (lltlK), the rising signal is output as in the case of the manual operation switch 6 described above.
The set terminal S of the valve R8 flip-flop 8a and the reset terminal RKJ of the lowering RS flip-flop 8b are connected, and the motor 1 rotates in the upward direction. However, diode D
5, the stop signal circuit is not energized, so even if the one-touch operation switch 7 is returned to the neutral position, the relay RL is not energized.
+ remains held, and the motor l continues to rotate in the upward direction. Furthermore, even if the movable contact 7a of the one-touch operation switch 7 is closed to the fixed contact 7C for lowering, the relay RTJ2 is held as in the above-mentioned case of raising, and even if the one-touch operation switch 7 is returned to the neutral position, the motor 1 continues to rotate downward. One-touch operation switch 7 above
When the manual operation switch 6 is operated in the downward direction while the motor 1 is rotating in the upward direction, a signal is applied to the reset terminal R of the upward RS flip-flop 8a and the set terminal S of the downward RS flip-flop 8b. Rare.

It will descend in reverse rotation. Further, when the manual operation switch 6 is continued to be operated in the downward direction and the one-touch operation switch 7 is operated in the upward direction, a signal is sent to the set terminal S of the upward RS flip-flop 8a and the reset terminal R of the downward RS flip-flop 8b. The motor 1 rotates in the opposite direction and the windshield rises. After that, when the manual operation switch 6 is returned to the neutral position, the stop signal causes the motor 1 to
will stop, and the windshield will stop rising.

As explained above, since the rotation direction of the motor 1 is controlled by the differential wave signal from the operation switch 6.7, the operation and rotation direction of the motor 1 by the operation switch 6.7 is controlled by the final operation switch 6.7. It is determined by the operation in step 7.

Next, the operations of the overcurrent detection circuit 3 and the relay circuit 8 will be explained. By operating the operation switch 6.7, the motor 1
When power is supplied from the power supply 5 to the motor 1, a voltage drop corresponding to the current flowing occurs across the resistor R1 connected in series with the motor 1. The voltage generated across this resistor R1 is used as the input voltage to the non-inverting input terminal 10 of the comparator 3a, and the reference voltage obtained by dividing the power supply voltage by the resistors R4 and R5 is input to the inverting input terminal 10 of the comparator 3a. At this time, if the normal energization to operate the windshield is not applied, it becomes a human-powered 1 voltage input terminal, and the windshield is closed or opened, or if your neck or arm is caught in the upper row of the windshield. The values of the resistors R1, R4, and R5 are selected so that when the current is applied due to an increase in the load on the motor 1, the input voltage becomes less than the input voltage.

Therefore, the output voltage of the comparator 3a becomes HI due to the increase in motor load, and is applied to the reset terminal R of the rising and falling RS flip-flop 8a18b of the relay circuit 8, and the motor 1 is stopped. Also, relay RLI, R
The movable contact of L2 is connected to the comparator 3a via diodes Di, D2, capacitor C1, and diode D4ffi.
is connected to the inverting input terminal of -.

This is because when the motor 1 is started, a starting current that is larger than the normal operating current momentarily flows, so the input terminal voltage of the comparator 3a becomes +>-, and even if the operation switch 6.7 is operated, a stop signal is immediately generated. This is to prevent the inconvenience of the motor 1 being stopped due to the input to the rising and falling RS flip-flops 8a and 8b, and the differential wave voltage is inverted by the comparator 3a only at the time of startup due to the operation of the relay RL1 or RL2. Applied to input terminal -. Figure 7 shows the current change when the motor 1 raises and lowers the windshield. Generally, the starting current is about 1.5 times the normal operating current, and the locking current at 9 when it is open or closed is It will be about 3 to 4 times as large. Therefore, comparator 8
By applying the differential wave voltage to the inverting input terminal of the comparator 8a only at startup as described above, the reference voltage of the inverting input terminal of the comparator 8a is set to a voltage corresponding to between the startup current and the normal operating current. can do.

Next, other embodiments of the present invention will be described with reference to FIGS. 2 to 6.

First, what is shown in FIG. 2 will be explained.

For example, when the motor 1 is rotated upward by the one-touch operation switch 7 and rotated downward by being reversed by the manual operation switch 6, an instantaneous reverse current several times the normal current flows through the motor 1. At this time, in the case shown in Fig. 1, a differential wave voltage is applied to the inverting input terminal - of the comparator 3a only when the motor l is started, but since this voltage is not generated when the motor is in the reverse direction, the output of the comparator 3a is If the motor 1 becomes HI and the input time of the lowering operation signal is long, the relay RL2 may cause chattering. In order to solve this problem, as shown in FIG. 2, capacitors C201 are connected to the movable contacts of relays RL+1 and RR2, respectively.

Diode D201, D202, capacitor C202
.

Diode D203. D204 takes out the differential wave voltage and applies it to the inverting input terminal of the comparator 3a,
A stop signal is not generated at the time of starting and also at the time of reverse rotation, thereby ensuring reliable reverse operation.

What is shown in Fig. 3 is the relay RLI, R shown in Fig. 2.
An RS flip-flop 8a for raising and lowering the power supply voltage from the movable contact of L2.

8b, and has the effect that the influence of the motor l and contact arc voltage can be ignored compared to the one shown in FIG.

In the one shown in FIG. 4, the rising differential wave signal and the falling differential wave signal are applied to the inverting input terminal of the comparator 8a via diodes 401 and 402, which has the effect of reducing the number of parts. .

In the case shown in FIG. 5, the power supply voltage is connected to a resistor R501.

A comparator 3b is added that applies the reference voltage divided by R502 to the inverting input terminal - and the rising and falling differential wave signals to the non-inverting input terminal.Comparator 3b is used only when the rising and falling differential wave signals are input. is applied to the inverting input terminal - of the comparator 3&. Compared to the one shown in Figure 4, this one has a capacitor c
3, the value of c4 can be made small.

In the circuit shown in FIG. 6, a transistor Tr601 is turned on by a rising differential wave signal and a falling differential wave signal, and the output of the comparator 3a is grounded through a resistor 601.

〔Effect of the invention〕

As explained above, this invention prevents the instantaneous current at the time of starting or reversing the motor from being generated as the output of the overcurrent detection circuit by the signal voltage from the relay circuit generated by operating the operation switch. Now that it's configured, close the window glass.

Even if an arm or neck is caught while opening or raising the windshield, the motor and windshield can be stopped with a light load, resulting in improved safety and responsiveness.

[Brief explanation of the drawing]

FIG. 1 is an electric circuit diagram of an automatic windshield lift control device showing one embodiment of the present invention, and FIGS. 2 to 6 are electric circuit diagrams of automatic windshield lift control devices showing other embodiments of the invention. , FIG. 7 is a diagram showing degree changes in the motor load current when the windshield is raised and lowered, and FIG. 8 is an electric circuit diagram of a conventional automatic windshield raising and lowering control device. In the figure, lij is a reversible motor, 8 is an overcurrent detection circuit, 6.7 is an operation switch, and 8 is a relay circuit. R1 is a current detection resistor. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims (1)

[Claims] A reversible motor for driving the windshield up and down, an operation switch that determines the rotation direction of the reversible motor, a relay circuit that controls the operation of the reversible motor by the operation switch, and an energization path for the reversible motor. and an overcurrent detection circuit that stops the operation of the relay circuit when the voltage generated across the current detection resistor reaches a predetermined value or more. An automatic windshield lift control device characterized in that the output of the overcurrent detection circuit is not applied to the relay circuit only at the time of startup or reverse rotation.