JPH0238684A - Controller for regulator for power window - Google Patents

Abstract

PURPOSE:To prevent the overheat of a motor and the consumption of a power supply by installing an auto-stop circuit detecting the flowing of lock currents and releasing the state of the formation of a conduction path when lock currents are made to flow when the motor is conducted. CONSTITUTION:A holding circuit 70 holds the state in which the conduction path of a motor 34 open-close operating a window glass is shaped in response to the ON operation of an auto-mode switch 14. The holding circuit 70 includes a capacitor 47 charged in response to the ON of the auto-mode switch 14 and a switching element 62 turned ON when the terminal voltage of the capacitor 47 is brought to a specified level or more. An auto-stop circuit 54 detects the flowing of lock currents when lock currents are made to flow when the motor 34 is conducted, and releases the state of the formation of the conduction path by the holding circuit 70.

Description

[Detailed Description of the Invention] [Object of the Invention] (Before Industrial Use) The present invention relates to a control device for a power window regulator in which a windshield is opened and closed by a motor, and in particular, a control device for a power window regulator in which a windshield is opened and closed by a motor. The present invention relates to a control device for a power window regulator that, when operated, continues to energize the motor even after the operation is released, thereby automatically moving the window glass to its final position.

(Prior Art) For example, in a control device for a power window regulator installed on the driver's side door of an automobile, a manual mode switch and an auto mode switch are provided as operating means. It is configured as follows. That is, the configuration is such that the relay controls the energization of the motor for moving the windshield up and down, and when the manual mode switch is turned on, the relay is operated to form a energizing path for the motor. It looks like this. As a result, when the manual mode switch is on, the window glass is moved up and down only during the on period, and thereby the window glass can be moved to any desired position. In addition, when the relay is activated by turning on the auto mode switch, its operation status can be checked. ! 3 (that is, state B in which the motor current conduction path is formed) is provided with a holding circuit that holds the state B even after the auto mode switch is turned off, and when a lock current flows when the motor is energized in such a holding state. The configuration is such that an auto-stop circuit is provided which detects this and releases the holding of the operating state of the relay by the holding circuit. As a result, when the auto mode switch is turned on with a one-touch operation, the relay is held in the operating state by the holding circuit even after the auto mode switch is turned off, so the motor continues to be energized and the windshield moves (raises). or descend). When the windshield reaches its final position (window fully closed position or fully open position) due to such movement, the operating state of the relay is released by the auto-stop circuit that detects the locking current of the motor associated with this movement. Thus, when the windshield reaches its final position, power to the motor is automatically stopped.

(WJ to be solved by the invention) By the way, once the lock current begins to flow in the motor, the lock current decreases as the winding temperature rises, and in some cases, the lock current flows into the auto-stop circuit. It may fall below the threshold level set for detection.

If such a situation occurs, the holding state by the holding circuit will not be released no matter how long it takes, and the motor will continue to be energized carelessly, resulting in abnormal heat generation of the motor and damage to the vehicle battery, which is the power source. There is a risk that the wear and tear will increase.

The present invention has been made in view of the above circumstances, and its purpose is to prevent, if the motor for opening and closing the windshield is in a locked state when energized, the locked state may continue for an unintentionally long time. To provide a control device for a power window regulator that can reliably prevent such a situation from occurring, such as overheating of a motor or increased consumption of a power source.

[Structure of the Invention] (Means for Solving the Problems) In order to achieve the above object, the present invention provides a state in which an energizing path is formed for a motor for opening and closing the windshield in response to an on-operation of an auto mode switch. A holding circuit for holding the capacitor that is charged in response to the above auto mode switch being turned on, and the charge fJ of this capacitor:
The device is configured with a discharging resistor that discharges the electric charge over a certain period of time, and a switching element that is turned on only when the terminal voltage of the capacitor is equal to or higher than a predetermined level to form a current-carrying path for the motor, and is locked when the motor is energized. The structure includes an auto-stop circuit that detects when a current flows and releases the current-carrying path formation state by the holding circuit.

(Function) When the auto mode switch is turned on, the holding circuit charges the capacitor, and the charged charge is discharged by the discharge resistor over a certain period of time.
During a period when the terminal voltage of the capacitor is at a predetermined level or higher, the switching element is turned on to maintain a state in which a current-carrying path for the motor is formed. Therefore, at this time, even after the auto mode switch is turned off in response to the release of the auto mode switch, a current-carrying path for the motor is continuously formed, so that the window glass can be opened or closed. become. When the windshield is moved to the final position due to such an operation, the motor becomes locked and a lock current flows, so the auto-stop circuit detects this and releases the current-carrying path formation state by the holding circuit. , the motor is automatically cut off. However, once the lock current begins to flow through the motor, the lock current decreases as the winding temperature rises, and the automatic power cutoff operation by the auto-stop circuit described above is not performed. However, after that, the discharge of the capacitor in the holding circuit progresses, and the terminal voltage thereof falls below the switch-on level, and accordingly, the current-carrying path of the motor is cut off. Therefore, there is no possibility that the motor is inadvertently kept energized for a long time.

(Example) Hereinafter, an example in which the present invention is applied to a control device for a power window regulator for a driver's seat of an automobile will be described with reference to FIGS. 1 to 6.

First, in FIGS. 2 to 4, 1 is a plastic switch case in the shape of a rectangular container with an open bottom, and 2 is a rectangular cylindrical plastic relay case fitted into the switch case 1. The case 2 has claws 2a protruding from both front and rear walls (corresponding to the left and right side walls in FIG. 3).

2a to the engagement holes 1a and l formed on the switch case 1 side.
They are fixed by being locked to a, respectively. 3 is a rectangular printed wiring board, which is switch case 1
The relay case 2 is disposed within the relay case 2 so that its position is restricted by the upper edge of the relay case 2.

Reference numeral 4 denotes a movable contact member made of silicone rubber, for example, arranged on the printed wiring board 3. As shown in FIG. 6d and tapered cylindrical support portions 7a to 7d that elastically support these are integrally molded in a rectangular arrangement. At this time, each of the above-mentioned supporting parts 7a~
7d are formed to have the same size and shape so that their elastic forces are equal to each other. The movable contact member 4 is fixed as shown in FIG. As shown in FIG. 3, this is done by sandwiching both front and rear end edges between protrusions 1d and 1e formed on the switch case 1 and a printed wiring board 3.

Now, on the bottom surface of each of the movable contact holders 6a to 6d, there are movable contacts 8a to 8d (in FIGS. 2 and 3, holders 6a to 6d).
Only the one corresponding to 6C is shown; for 8d, see FIG. 1) is fixed with adhesive. Further, on the printed wiring board 3, four pairs of fixed contacts 9a and 10a to 9d are arranged so as to face each of the movable contacts 8a to 8d.
and 10d (9a, 10a, 9b in Figures 2 and 3)
.

10b and 9C (see FIG. 1 for the others) are formed using printed wiring patterns. The movable contact holder 6a, iiJ movable contact 8
A and fixed contacts 9a and 10a constitute one manual up switch tR, and movable contact holders 6b and i1
(2) The moving contact 8b and the fixed contacts 9b and 10b constitute an auto-up switch 12 which is an auto mode switch. Further, a manual down switch 13 is configured by the movable contact holder 6c, the movable contact 8C, and the fixed contacts 9c and 10c, and the movable contact holder 6d and the movable contact 8d.
The fixed contacts 9d and 10d constitute an auto down switch 14 (see FIG. 1) which is an auto mode switch. As a result, when the movable contact holders 6a to 6d are pressed down, the fixed contacts 9a and 10a to 9d
and 10d are bridged by the corresponding movable contacts 8a to 8d to turn on each switch 11 to 14, and thereafter, when the push-down operation of the movable contact holders 6a to 6d is released, each movable contact holder 68 to 6d are restored and deformed by the elastic force of the supporting parts 78 to 7d, and the bridging state is canceled, so that each switch 11 to 14 is turned off.

On the top surface of the switch case 1, there are movable contact holders 6a, 6.
A bulging portion 1 is formed to define a storage chamber 15 extending in the left-right direction in FIG. A bulging portion 1g is formed to define a chamber 16, and each of the bulging portions 1f and 1g is provided with an operating opening (not numbered) at a position eccentric to the left in FIG. There is. Reference numeral 17 denotes a first presser disposed in the storage chamber 15, which has an elongated shape extending in the left-right direction in FIG. 2, and is placed between the movable contact holders 6a and 6b. ing. At this time, on the upper surface of the first suppressor 17, a protrusion 17a, which serves as an operating point, is integrally formed at a position eccentric to the left in FIG. It projects upward from the opening at 1f. In other words, the first suppressor 17 has a protrusion 17a to which an external operating force is applied.
is set to be at a position shifted from the center position between each movable contact holder 6a and 6b.

Further, 18 is a second presser arranged in the storage chamber 16, and this has a protrusion 1 at the same position as the first presser 17.
The movable contact holders 6c, 6 have an elongated shape with 8a H.
The protrusion 18a projects upward from the opening of the bulging portion 1g in a state where it is bridged between the protrusions 1g and 1g. That is, the second suppression T-18 is also set so that the protrusion 18a to which the external operating force is applied is located at a position shifted from the center position between the movable contact holders 6C and 6d.

A pair of knob support parts 1 and 20 are integrally provided on the upper surface of the switch case 1 and are spaced apart from each other in the left and right directions, and shaft supports 19a and 20a are formed on the outer surfaces of these parts. An operation knob (not shown) is rotatably supported on the knob support parts 1 and 20 about shaft supports 19a and 20a, and the first and second operation knobs are rotatably supported on the knob support parts 1 and 20. The protrusions 17a and 18a of the second pressers 17 and 18 are pushed away. Further, as shown in FIG. 3, a cylindrical light source housing part 21 is integrally formed on the upper surface of the switch case 1 to protrude, and a light emitting diode 22 for switch illumination is housed in this light source housing part 21. has been done. The operation knob (not shown) has a shape that covers the light emitting diode 22, and the operation knob is provided with a transparent portion for guiding light from the light emitting diode 22 to the outside.

Now, in the relay case 2, conductive plates 23 to 29 having a shape as shown in FIG. 4 are insert-molded. In the state before insert molding, the conductive plate 23-24-2
5, 25-26, and 26-27 are integrated by connecting plates Yl, Y2, and Y3 shown by two-dot chain lines in FIG. 4, and the conductive plates 28-29 are also connected by two-dot chain lines. It is integrated by plate Y4, and these connecting plates Y1 to
By removing Y4 by cutting after insert molding, the positional relationship between each of the conductive plates 23 to 29 is made more accurate. And, on the conductive plates 23, 25° 27 and 29,
Terminals Tl, "r2, T3 and T4 are provided which are bent downward and protrude from the lower end of the relay case 2. Also, the conductive plates 23 to 20 are provided with terminals Tl, "r2, T3 and T4 which are bent upward and protrude from the lower end of the relay case 2. 1T-px to P7 protruding from the printed wiring board 3 are provided, and these terminals P1 to P7 are configured to penetrate the printed wiring board 3.
3, 24, 26, 27 and 28 have through holes 23a, 2
4a, 26a, 27a and 28a are respectively formed in the conductive plate 25, and through holes 25a, 25b, 25 are formed in the conductive plate 25.
C is formed.

In the relay case 2, there is a relay device 30 (the internal structure of which is not shown, but actually includes two relays, as will be clear from the description below), which has seven terminals Ra to Rh that protrude upward. ) is stored, and each terminal Ra
-Rh is the through hole 23a, 24a, 25a=-
25c, 26a.

27a and 28a, and in the inserted state is connected to the corresponding conductive plates 23 to 28 by flat soldering. Furthermore, conductive t! 1228 is provided with a crank-shaped connection extension 28b (see FIG. 3) that is bent downward and extends to the bottom of the relay case 2.
A resistor 31 is connected between the lower part of the terminal T4 and the middle part of the terminal T4.
(See Figures 1 and 2) are connected. Note that, as shown in FIG. 2, the switch case 1 and the relay case 2 are provided with cut-out openings 1h and 2b for heat dissipation, respectively, so as to correspond to the resistor 31.

As a result of the above configuration, each terminal Ra - Rh and the resistor 31 of the relay device 3[) are connected to the terminals T1 to T4. P
I to P7 are connected to each other as shown in FIG. 1, which shows the electrical configuration, and FIG. 1 will be described below. That is, the terminal Ra is connected to the terminals Tl and PI, and the terminal Rb is connected to the terminal P2. Terminal Rc
, Rd, Re are terminals T2. P3 in common, and terminal Rf is connected to terminal P4. Further, the terminal Rh is connected to the terminal P6 and one end of the resistor 31, and the terminal Rh is connected to the terminal P6 and one end of the resistor 31.
The other end is terminal T4. Connected to P7. Furthermore, terminal R
g is terminal T3. Connected to P5. On the other hand, relay device 3
0 has a configuration including two excitation coils 32a and 33a and two relay switches 32b and 33b that are operated by turning on and off the excitation coils 32a and 33a.
and 33a are between the terminals Rc and Rb and between the terminals Rd and Rf, respectively.
connected between. In addition, in the relay switches 32b and 33b, the common contact C is the terminal Ra and Rg.
are individually connected to terminal R, and each normally open contact a is connected to terminal R.
e, and the normally closed contacts are also commonly connected to terminal Rh.

Terminals TI and T3 are connected to input terminals of a DC motor 34 for driving a window regulator. In this case, when the motor 34 is energized in the direction of arrow A in the figure, the window glass (not shown) is raised. , the window glass is configured to descend when energized in the opposite direction of arrow A.

Further, the terminal T2 is connected to the power supply terminal 35, and the terminal T4 is connected to the ground terminal. Note that the power terminal 35 is
It is connected to the (+) terminal of the battery via an ignition contact (none of which is shown).

Reference numeral 36 denotes a control circuit device disposed using both sides of the printed wiring board 3, and has a configuration as described below.

That is, this control circuit device 36 is connected to the manual up switch 11. The auto-lock switch 12° includes a manual down switch 13 and an auto down switch 14, and the manual knob switch 11 is connected to terminal P2.
and 27, and the manual down switch 13
is connected between terminal P4 and terminal 27. As a result, when the manual up switch 11 is turned on, the excitation coil 32a of the relay device 30 is energized and the contacts (C-a) of the relay switch 32b are turned on. A current in the direction of arrow A is now supplied, and the window glass is raised accordingly. In addition, when the manual down switch 13 is turned on, the contacts (C-a) of the relay switch 33b are turned on in response to the energization of the excitation coil 33a, so that a current in the opposite direction of arrow A is applied to the motor 34. is supplied and the window glass is lowered. Then, during the period when the contacts (c-a) I-Y of the relay switch 32b are on, the terminal P1 is connected to the power supply terminal 35, and during the period when the contacts (c-a) of the relay switch 33b are on, the terminal P1 is connected to the power supply terminal 35. In this state, the terminal P5 is connected to the power supply terminal 35. The above terminal P1. P5 is connected to the bus 3-9 via a diode OR circuit 37 and a resistor 38;
9 is a terminal P7 via a constant voltage diode 40 with the polarity shown.
It is connected to the. Therefore, a constant voltage is applied between the bus bar 39 and the terminal 27 with either the manual up switch 11 or the manual down switch 13 turned on. Incidentally, since the current supply to the motor 34 as described above is performed through the resistor 31, a detection voltage Vd of a voltage level corresponding to the load current flowing to the motor 34 appears at both ends of the resistor 31. Detection voltage Vd
is now applied between terminals P6 and 27.

Further, the auto-up switch 12 has one end connected to the bus bar 39, and a series circuit of a resistor 41 and a capacitor 42, which is a timer element, between the other end and the terminal P7.
A series circuit of a diode 43 with the illustrated polarity and the manual down switch 13, a series circuit of a diode 44 with the illustrated polarity, and a resistor 45 corresponding to the discharge resistor in the present invention are connected, respectively. The auto-down switch 14 has one end connected to the bus bar 39, and a resistor 46 and a capacitor 47, which is a timer element, between the other end and the terminal P7.
A series circuit of the diode 48 with the illustrated polarity and the manual up switch 11, a series circuit of the diode 49 with the illustrated polarity and the resistor 45 are connected, respectively. In this case, the capacitances of capacitors 42 and 47 are set equal, and the charging time constant of capacitor 42 via resistor 41 and the charging time constant of capacitor 47 via resistor 46 are equal to each other, for example, 001 seconds. the discharge time constant of capacitor 42 through resistor 41.45, as well as the discharge time constant of capacitor 4 through resistor 46°45.
The charging time constants of No. 7 are set to be equal to each other, for example, about 10 seconds.

Reference numeral 50 denotes a first reference voltage generation circuit, which is constructed by connecting a resistor 51 and a trimming resistor 52 in series between the bus bar 39 and the terminal 27, and generates a reference voltage V s from their common connection point.
Generates 1. 53 is a first comparator circuit that constitutes an auto-stop circuit 54 together with the resistor 31 and the first reference voltage generating circuit 50;
7, and the reference voltage V
s 1 and the detected voltage Vd from the terminal P6, and outputs a high level signal (corresponding to the potential of the bus 39) when the relationship Vsl>Vd. When the relationship is ≦Vd, the output is inverted to a low level signal (according to the potential of terminal P7/I). The output terminal of the first comparison circuit 53 is connected to a resistor 55.
and is connected to the terminal P7 via the resistor 45.

Note that the resistance ratio of the resistors 55 and 45 is, for example, 1/10.
It is set to about.

Reference numeral 56 denotes a second reference voltage generation circuit, which is constructed by connecting resistors 57 and 58 in series between the bus bar 39 and the terminal 27.
A reference voltage V s z is generated from their common connection point. 59 is a second comparison circuit, which is connected to the reference voltage Vs2.
and the divided voltage Vt from the common connection point Q of the resistors 55 and 45 are compared, and VS2 <V
When the relationship is t, a high level signal (corresponding to the potential of the bus bar 39) is output, and when the relationship is V s 2≧Vt, a low level signal (corresponding to the potential of the terminal P7) is output.

The output terminal of the second comparator circuit 59 is connected to the terminal P7 via a constant voltage diode 60 with the illustrated polarity, and is also connected to the bus bar 39 via a resistor 61.

Reference numeral 62 denotes an npn type transistor which is a switching element turned on by the output of the second comparator circuit 59. Its collector and emitter are connected to terminals P2 and P5, respectively, and its base is connected via a diode 63 with the polarity shown. The second comparison circuit is connected to five output terminals. A constant voltage diode 64 of the illustrated polarity is connected between the collector and emitter of this transistor 62, and a resistor 65 is connected between the base and emitter.

Reference numeral 66 denotes an npn type transistor which is a switching element that is also turned on by the output of the second comparator circuit 59. Its collector and emitter are connected to the terminals P4 and Pl, respectively, and its base is connected to the transistor through a diode 67 with the polarity shown. It is connected to the output terminal of the second comparison circuit 59. A constant voltage diode 68 of the illustrated polarity is connected between the collector and emitter of this transistor 66, and six resistors are connected between the base and emitter. And the capacitor 42.47. Resistance 41.45,46
．． Second reference voltage generation circuit 56.Second comparison circuit 59.
Transistor 62, 66° Diode 44, 49.63
．． 67 and the like constitute a holding circuit 70 in the present invention.

Note that 71 is a current limiting resistor, and a series circuit of this and the light emitting diode 22 is connected to terminals P3 and 27. Therefore, when the ignition switch (not shown) is turned on, the light emitting diode 22 is energized and lit, thereby illuminating the operation knob (not shown).

Next, to explain the operation of the above configuration, first, referring to FIG. 6, the manual up switch 11, the auto up switch 12. The operations of the manual down switch 13 and the auto down switch 14 will be described. Now, by operating an operation knob (not shown), for example, if a downward operating force is applied to the protrusion 17a of the first presser 17,
A depressing force is applied to each of the movable contact holders 6a and 6b of the manual up switch 11 and the auto up switch 12, which resists the elastic force of the respective support parts 7a and 7b. However, in the first presser 17,
A protrusion 17a, which is bridged between the movable contact holders 6a and 65 in a juxtaposed manner and to which a push-down operation force is applied from the outside, moves from the center position between the movable contact holders 6a and 6b to one of the movable contacts. Since the movable contact holder 6a is set to be in a position shifted toward the holder 6a, the push-down moment force acting on each of the holders 6a and 6b is larger for the movable contact holder 6a that is closer to the protrusion 17a. Further, in this case, since the elastic forces of the supports 7a and 7b are set to be approximately equal, the elastic forces of the supports 7a and 7b are
), one of the supporting parts 7a is first moved from the state shown in (b) in the same figure.
The fixed contacts 9a and 1 buckle as shown in FIG.
0a is bridged by the movable contact 8a, and the manual up switch 11 is turned on.

In this state, operate the operation knob (and even the first pusher 1).
7), the buckled support portion 7a returns to deformation as shown in FIG. 6(a), and the manual up switch 11 is turned off.
When the first suppression T-17 is further pressed down using the operation knob, the movable contact holder 6a is restrained from being pressed down any further, so that the other movable contact holder 6b is pressed down. Therefore, the support portion 7b corresponding to the movable contact holder 6b also buckles as shown in FIG. 6(C), and the fixed contacts 9b and 10 accordingly buckle.
b is bridged by the movable contact 8b, and the auto-up switch 12 is turned on.

As described above, when the up switches 11 and 12 are turned on, the supporting parts 7a and 7b buckle, respectively, and the movement of the movable contact holders 6a and 6b is restricted, so that the up switches 11 and 12 are turned on in synchronization with each other. This creates a sense of moderation. In addition, each up switch 11 and 12 as described above
When the operation knob is released in this state, the buckled supports 7b and 7a will return to their original shape in sequence, and the auto-up switch 12 and manual-up switch 11 will be turned off in sequence accordingly. will be done. Also, the protrusion 18 of the second presser 18 can be adjusted by the operation knob.
When a push-down operation force is applied to a, and the push-down operation is subsequently released, the manual down switch 13 and the auto down switch 14 are turned on and off in the same manner as described above, and especially when each turn is turned on, the moderation is synchronously turned on and off. It is something that gives rise to feelings.

Now, the operation of the electrical configuration shown in FIG. 1 will be explained below.

(a) When moving the windshield up and down in manual mode... To raise the windshield, turn on the manual up switch 11. Then, as described above, the excitation coil 32a of the relay device 30 is energized, turning on the contacts (C-a) of the relay switch 32b, and in response, current is supplied to the motor 34 in the direction of arrow A. and the windshield is raised. When the manual up switch 11 is turned off when the windshield is raised in this manner, the relay switch 32b returns to the on state between the contacts (c and b) in response to the power cutoff of the excitation coil 32a, so the motor 34 is cut off. Electricity is applied to stop the windshield from rising. In addition, when lowering the windshield, if the manual down switch 13 is turned on, the excitation coil 33a of the relay device 30 is energized and the contacts (C-a) of the relay switch 33b are turned on, so that the motor Tsm in the opposite direction of arrow A is supplied to 34, and the window glass is lowered. When the windshield is lowered, if the manual down switch 13 is turned off, the relay switch 33b returns to the on state between the contacts (c and b), and the motor 34 is cut off, so that the windshield door is turned off. rain will be stopped.

(b) When raising the windshield in auto mode... When the auto up switch 12 is turned on, the manual up switch 11 is already on at this point, so the relay switch 32b as described above is turned on. Contact (C-a
), the excitation coil 32a is energized and the motor 34 is driven, and in response, the windshield begins to rise. When the auto-up switch 12 is turned on, the capacitor 42 is charged instantaneously (actually, it takes about 0.01 seconds) through the resistor 41, and the divided voltage from the common contact point Q of the resistors 44 and 45 is accordingly charged. Voltage Vt becomes larger than reference voltage Vs2 from second reference voltage generation circuit 56.

Therefore, the output of the second comparison circuit 59 is at high level t=
The high level fJ is inverted to the transistor 62.
diodes 63 or 6 for each base of and 66, respectively.
It is given through 7. At this time, the emitter potential of one transistor 62 is the terminal P5. Between the contacts (c and b) of the relay switch 33b.

Although it is at a relatively low potential through the resistor 31, the emitter potential of the other transistor 66 is connected to the power supply terminal 35 through the terminal P1 and the contact point (c-a) of the relay switch 32b.
Therefore, only transistor 62 is turned on and transistor 66 is not turned on. The transistor 62 remains in the on state until the output of the second comparison circuit 59 is inverted to a low level signal, that is, as the charge in the capacitor 42 is discharged through the resistor 45, the divided voltage V [is held for a time T until it becomes equal to or less than the reference voltage V s 2.

In this state where the transistor 62 is turned on, the current-carrying path of the relay coil 32a is between the collector and emitter of the transistor 62, and the terminal P5. relay switch 33
Since it is formed between the contacts (c and b) of b and through the resistor 31, the auto-up switch 12
Even when the manual up switch 11 is turned off, the motor 34 continues to be driven.
The windshield is then automatically raised.

Then, as described above, when the windshield is automatically raised and reaches the maximum raised position (window closed position), the motor 34 is locked and a relatively large locking current begins to flow. As a result, the voltage drop across the resistor 31 increases. In response to an increase in such a voltage drop, when the detection voltage Vd applied to the terminal P6 becomes larger than the base voltage VS from the first reference voltage generation circuit 50, the output of the first comparison circuit 53 becomes low level. signal(
(the potential level of terminal P7). Then, the charged r1 voltage 6I of the capacitor 42 comes to be discharged through the resistor 41, the diode 44, and the resistor 55, and accordingly, the divided voltage Vt from the connection point Q is increased from the second reference voltage generation circuit 56. It becomes lower than the reference voltage Vs2. As a result, the output of the second comparator circuit 59 is inverted to a low level signal and the transistor 62 is turned off, so the excitation coil 32a is cut off and the relay switch 32b is switched to the contact point (c
-b), the motor 34 returns to the on state during
'Frafed and the window is stopped in the maximum raised position. Note that the discharge time constant of the capacitor 42 via the resistors 41 and 55 is set to a value suitable for so-called retightening of the window glass.

However, as mentioned in the section on (conventional flJ), when a lock current flows through the motor 34, the lock current may decrease due to an increase in the winding temperature. When the motor 34 is driven in this mode, the detected voltage Vd may not exceed the reference voltage V s 1 no matter how long it takes, and in this case, the energization to the motor 34 may be continued inadvertently. An abnormal situation occurs. When such a situation occurs, the windings of the motor 34 may generate abnormal heat, and in some cases, the windings may be burnt out. However, in this embodiment, when the time T set in the discharge circuit consisting of the capacitor 42 and the resistor 45, which are timer elements of the holding circuit 70, has elapsed after the auto-up switch 12 is turned off, the resistor 55 is turned off.
Since the divided voltage Vt from the bar connection point Q of 45 and 45 becomes lower than the reference voltage V s 2 from the second reference voltage generation circuit 56, the output of the second comparison circuit 59 is inverted to a low level. I come to do it. Since this binding turns off the transistor 62, the excitation coil 32a is cut off, and the relay switch 32b returns to the on state between the contacts (c and b).
The motor 34 is then cut off. In other words, when the predetermined time T has elapsed since the motor 34 started driving in the auto mode, the motor 34 is automatically cut off, thereby preventing the above-mentioned abnormal situation from occurring. will be prevented.

(c) When lowering the windshield in auto mode... When the auto down switch 14 is turned on, the excitation coil 33a is energized by the manual down switch 13, which is turned on at this point, and When the contacts (C-a) of the relay switch 33b are turned on in response, the motor 34 is driven as described above and the lowering of the window glass is started. Also, auto down switch 1
4 is turned on, the capacitor 47 is charged,
The divided voltage Vt from the common connection point Q of the resistors 55 and 45 becomes larger than the reference voltage VS2 from the second reference voltage generation circuit 56, and in response, a high level signal is output from the second comparison circuit 59. Ru. At this time, the transistor 62
, its emitter potential is at terminal P5. Although it does not turn on because it is at the potential level of the power supply terminal 35 through the contacts (C-a) of the relay switch 33b, the transistor 66
Its emitter potential is terminal Pl, relay switch 32
Since the potential level between the contacts (c and b) of b is at a relatively low level via the resistor 31, it is turned on. The on state of the transistor 66 is maintained for a time T-(-T) until the divided voltage Vt becomes equal to or less than the reference voltage VS2 as the charging type 6I of the capacitor 47 is discharged through the resistor 45. During this holding period, the relay coil 33a
A current conducting path is formed between the collector and emitter of the transistor 66, between the terminal P1° and the contact point (c-b) of the relay switch 32b, and through the resistor 31.
3 is turned off, the motor 34 continues to be driven, and the window glass is automatically lowered.

When the windshield reaches the maximum lowering position (maximum opening position of the window) in response to the lowering of the window glass, a relatively large locking current flows through the motor 34, so that similar to the automatic raising of the windshield described above, The output of the first comparator circuit 53 is inverted to a low level signal, and the capacitor 47 is charged MflX6f. It is discharged through the four diodes and the resistor 55, and in response, the output of the second comparator circuit 59 is also inverted to a low level signal, turning off the transistor 66, thereby cutting off the power to the excitation coil 33a and the motor 34. The windshield is stopped at the maximum lowered position. Of course, during such an automatic lowering operation of the windshield, after the auto-down switch 14 is turned off, the capacitor 47 and the resistor 45, which are timer elements, are
When the time T' set in the discharge circuit consisting of
2, the outputs of the five second comparator circuits are inverted to low level signals, so the corresponding transistor 6 is inverted.
6 is turned off, the motor 34 is de-energized. Therefore, even in this case, the occurrence of an abnormal situation in which energization of the motor 34 is inadvertently continued can be prevented.

(d) When stopping the raising of the windshield while it is raised in auto mode...When the windshield is raised in auto mode, as is clear from the above explanation, the capacitor 42 is in a charging state, and correspondingly transistor 62 is in an on state. In such a state, when the manual down switch 13 is turned on for a short period of time, the excitation coil 33a is energized and the contacts (C-a) of the relay switch 33b are turned on, so that both ends of the motor 34 are turned on. The motor 34 is short-circuited between the contacts (c-b) of the relay switches 32b and 33b, and the motor 34 is immediately stopped. Furthermore, when the upper manual down switch 13 is turned on, the charge in the capacitor 42 is instantly discharged via the diode 43 and the manual down switch 13, so the output of the second comparison circuit 59 becomes a low level signal. Inversely, the transistor 62 is turned off. As a result, the excitation coil 32a is cut off and the relay switch 32b returns to the on state between the contacts (c and b), and the manual down switch 13 is turned off after being turned on for a short time as described above. When the excitation coil 33a is cut off, the relay switch 33
b also returns to the on state between contacts (c and b),
As a result, the motor 34 is returned to its initial state in which power is cut off.

(E) When stopping the lowering while the windshield is lowered in auto mode...When the windshield is lowered in auto mode, as is clear from the above explanation, the capacitor 47 is in a charging state, and correspondingly transistor 66 is in an on state. In such a state, when the manual up switch 11 is turned on for a short time, the excitation coil 32a is energized and the contacts (C-a) of the relay switch 32b are turned on, so that both ends of the motor 34 are turned on. The motor 34 is short-circuited between the contacts (c-b) of the relay switches 32b and 33b, and the motor 34 is immediately stopped. Furthermore, when the manual up switch 11 is turned on, the charge in the capacitor 47 is instantly discharged via the diode 48 and the manual up switch 11, so the output of the second comparison circuit 59 is inverted to a low level signal. The transistor 66 is then turned off. As a result, the excitation coil 33a is cut off and the relay switch 33b returns to the on state between the contacts (c and b), and the manual up switch 11 is turned off after being turned on for a short time as described above. When the excitation coil 32a is cut off, the relay switch 32
b also returns to the on state between contacts (c and b),
As a result, the motor 34 is returned to its initial state in which power is cut off.

In summary, according to the configuration of this embodiment, when the windshield is raised or lowered in auto mode by operating the auto-up switch 12 or the auto-down switch 14, the creation of the ascending motion is performed by stopping the descending motion. Even if the function of the auto-stop circuit 54 to stop the motor 34 (the function of detecting the lock current of the motor 34 and stopping the motor 34) is impaired, the holding circuit 70 having a timer function using the capacitor 42 or 47 stops each of the above operations after a predetermined period of time. can be stopped. Therefore, there is no risk that the motor 34 will be inadvertently energized for a long time while it is in the locked state.
This eliminates the risk of the motor 34 overheating or increasing the consumption of the vehicle battery as in the conventional case.

Further, according to the above configuration, in response to the operation of an operation knob (not shown), the manual up switch 11 or the manual down switch 13 is first turned on, and then the auto up switch 12 or the auto down switch 14 is turned on. operation is obtained, and each of the above switches 11
14, the supporting parts 7a to 7d buckle and a feeling of moderation occurs as the movable contact holders 6a to 6d are restrained from being pressed down, but as described above, the movable contact holders The timing at which pressing down of the buttons 6a to 6d is restrained coincides with the timing at which the corresponding switches 11 to 14 are turned on, so that as a result, the timing at which the moderation feeling occurs and the corresponding switch 11
There is an advantage that the on-timings of 1 to 14 reliably match.

Incidentally, as shown in FIG. 7 showing another embodiment of the present invention, among the supporting parts 7a to 7d provided to correspond to the four movable contact holders 6a to 6d, the auto up switch 12 and the auto down switch Support parts 7b, 7 corresponding to the switch 14
d is formed thicker than the supporting parts 7a and 7c corresponding to the manual up switch 11 and the manual down switch 13, so that the elastic forces thereof are different from each other, while each pressing force T17 and 18 is Protrusions 17a and 18a
may be set so as to be located at the center position between the movable contact holders 6a, 6b and at the center position between the movable contact holders 6c, 6d, respectively. In this configuration, when a pushing force is applied to the pressing force f17 or 18 through the protrusion 17a or 18a, the support portion 7a or 7C, which has a small elastic force, buckles first and is manually raised. The switch 11 or the manual down switch 13 is turned on, and after stiffening, the support part 7b or 7d with the elastic force buckles and the auto up switch 12 or the auto down switch 14 is turned on.As a result, The present invention is not limited to the above, and various modifications may be made without departing from the spirit of the present invention, for example, other structures may be used as the switch device including the auto mode switch.

[Effects of the Invention] As described above, according to the present invention, the maintenance circuit 17 for maintaining the state in which the energized path of the motor that opens and closes the windshield in response to the ON operation of the auto mode switch is configured as described above. A capacitor that is charged when the auto mode switch is turned on, a discharge resistor that discharges the charge of the capacitor over a certain period of time, and a discharge resistor that is turned on only when the terminal voltage of the capacitor is at a predetermined level or higher to open the current-carrying path of the motor. In addition, the structure includes an auto-stop circuit that detects when a lock current flows when the motor is energized and releases the current-carrying path formation state by the holding circuit. If this locks when the motor is opened or closed, that is, when the motor is energized, it can reliably prevent the locked state from continuing for an unintentionally long time or causing the motor to overheat or consume power. This has the excellent effect of being able to prevent the situation from increasing.

[Brief explanation of the drawing]

1 to 6 show one embodiment of the present invention, FIG. 1 is a wiring diagram showing the electrical configuration, and FIG. 2 is a wiring diagram showing the electrical configuration, and FIG.
3 is a sectional view taken along the line ■--■ in FIG. 4, FIG. 4 is a cross-sectional view, FIG. 5 is a perspective view of the movable contact member, and FIG. ) (b) and (C) are vertical cross-sectional views showing the main parts in a light state, respectively. Moreover, FIG. 7 is a diagram corresponding to FIG. 6(a) showing another embodiment of the present invention. In the figure, 1 is a switch case, 2 is a relay case, 3 is a printed wiring board, 4 is IIJ moving contact member, 6a to 6d are 1-II moving contact holders, 7a and 7c are support parts, 7b, 7
d is a support part, 8a to 8d are movable contacts, 9a to 9d
, 10a to 10d are fixed contacts, 11 is a manual up switch, 12 is an auto up switch (auto mode switch), 13 is a manual down switch, 14 is an auto down switch (auto mode switch), 17 is the first suppression Child, 18 is the second presser, 17
a, 18a are projections, 23 to 29 are conductive plates, 30 is a relay device, 31 is a resistor, 34 is a motor, 36 is a control circuit device, 42.47 is a capacitor, 45 is a discharge resistor, 54 is an auto-stop circuit, 62 and 66 are transistors (switching elements), and 70 is a holding circuit. Applicant: Tokai Rika Denki Seisakusho N-s+s (
2/n Fig. 2 Nflt+-618 (, 3/7) Fig. N8B-6+8+4+71 Fig. Nden-6111 (5) 7) Fig. (a) (b) (C) N8B-61 eup (6I)) Diagram

Claims (1)

[Claims] 1. A holding circuit that maintains the state in which a current-carrying path is formed for the motor that opens and closes the window glass in response to the ON operation of the auto mode switch, and detects when a lock current flows when the motor is energized. In the control device for a power window regulator, the holding circuit is equipped with a capacitor that is charged in response to turning on of the auto mode switch, and an auto-stop circuit that releases the state in which the current conduction path is formed by the holding circuit. A power window regulator comprising: a discharge resistor that discharges a charged charge over a certain period of time; and a switching element that is turned on only when the terminal voltage of the capacitor is equal to or higher than a predetermined level, and forms a current-carrying path for the motor. Control device.