JPH0723505Y2 - Power window lift control circuit - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a power window lifting control circuit for lifting and lowering a window glass by rotating a motor forward and backward in order to automatically open and close the window.

[Prior Art] In vehicles and the like, there is known a power window that opens and closes a window by simply and automatically raising and lowering the window glass by operating a switch.

FIG. 4 is an explanatory view showing an example of a power window switch, and the illustrated switch is a perspective view of a master switch part attached to a door armrest part of a driver's seat.

The master switch unit 12 has switches 12a, 12b, 12c and 12d for automatically raising and lowering windows of four doors, respectively.
Is provided. Each of the switches 12a to 12d is configured as a mechanism that is operated in two upper and lower stages around the neutral position. For example, as shown in FIG. 5, if one step operation is performed from the neutral position (position shown by the solid line) to a position having a moderation, and if it is operated to the X position shown by the one-dot chain line, manual up operation can be performed, and further two steps are made. The automatic up operation can be performed by raising the position to the Y position indicated by the chain double-dashed line. Although not shown, a manual down operation can be performed by operating the neutral position from the neutral position downward, and an automatic down operation can be performed by further operating the secondary position.

It should be noted that each of the switches is configured to automatically return by releasing the hand in either one-step operation or two-step operation.

Further, FIG. 6 shows a schematic configuration of a conventional power window control circuit (especially automatic control) operated by the switch as described above.
Is the up / down switch unit 16 (for example, the master switch unit)
This lifting switch section 16 is connected to
16a and a lowering switch 16b are provided. This is the common contact line 18 of both switches 16a and 16b is connected to the resistor R ₁ for detecting current change, the resistance R ₁ and the two switches
The line drawn from between the intermediate terminals 20 of 16a and 16b is connected to the switch holding release circuit 22. The switch hold release circuit 22 is provided with comparators 24 and 26 for comparing the voltage of the window lift motor 14 with a reference voltage and detecting an overcurrent of the motor. The output terminals of the reference voltage generation circuit (L) 28 and the reference voltage generation circuit H30 are connected to one input terminal of each of the comparators 24 and 26. The output terminal of the comparator 26 is connected to the base terminal of the transistor 32, and the collector side of the transistor 32 is connected to the solenoid 34 for holding the connection state of the rising switch 16a and the falling switch 16b. Further, a power supply line to the window lift motor 14 is connected to a connection line between the transistor 32 and the solenoid 34 via diodes 36 and 38.

The operation of this conventional control circuit is that the window lifting motor 14
When the normal rotation is normally performed by the automatic operation, the transistor 32 of the switch holding release circuit 22 is turned on by the output signal from the comparator 26.
In this state, the solenoid 34 is
The drive circuit of 14 is excited by the current supplied through the diodes 36 and 38, and the connection state of the ascending switch 16a and the descending switch 16b is maintained.

When the window raising / lowering motor 14 stops due to the window glass being fully opened, fully closed, or having an object sandwiched between them, the current of the window raising / lowering motor 14 rises and the voltage value input to the switch holding release circuit 22 rises. However, when the voltage becomes higher than the reference voltage from the reference voltage generation circuit (H) 30, the output from the comparison circuit 26 causes the transistor 32 to become OF.
F will be done. By the OFF operation of the transistor 32, the excitation of the solenoid 34 is released, the holding states of the switches 16a and 16b are released, and the energization of the window lifting motor 14 is cut off.

With such an operation, the window glass is automatically raised and lowered.

The solenoid 34 is energized in either one-step manual operation or two-step automatic operation of the switch operating portion. However, in the case of a two-step operation (automatic operation), a contact holding mechanism (not shown) that mechanically holds the connection state of the contact 16 to the power supply side until the excitation of the solenoid 34 is released by a predetermined release signal. Works. As a result, the automatic operation is performed until the window glass ascending or descending operation is completed and the solenoid 34 is de-energized.

[Problems to be solved by the invention] For example, when the operation of the window glass is stopped midway during the auto-up operation or auto-down operation, the manual operation in the direction opposite to the current operation direction is performed. The circuit is constructed so that it can be stopped by operating the switch 12 (see FIG. 5) to the operating position (not shown). However, the window glass cannot be stopped when the switch 12 is operated to the automatic operating position by pushing or pulling the switch 12 more than the manual operating position. That is, in the conventional control circuit as shown in FIG. 6, due to the action of the ascending contact holding mechanism, when the switching state of the elevating switch unit 16 is switched from the auto-up state to the auto-down state, the window is in the down state. The down operation is continued until the glass is fully closed. Therefore, when performing the automatic operation to either one, if the switch operation is performed to the automatic operation position in the opposite direction by pushing or pulling too much in order to stop the window glass in the middle, the above conventional control is performed. The circuit cannot stop lifting until the movement of the window glass in the opposite direction is complete.

In this way, the switch knob 12
The one-step operation and the two-step operation must be performed with a delicate sense of moderation, and the driver cannot perform the operation accurately while driving. Therefore, in the conventional control circuit, there is a problem that it is not possible to accurately perform the operation of stopping the window glass during the automatic operation of raising or lowering.

Also, even if you perform manual operation in the opposite direction during automatic operation to one side to stop that automatic operation,
When the manual operation is continued, the window is moved up and down in the manual operation direction. Therefore, there is also a problem that the window continues to move in the opposite direction until the switch is released.

The purpose of the present invention is to solve the above problems, and an object of the present invention is to reliably operate in one direction without operating the switch knob of the window lift switch with a delicate touch. It is an object of the present invention to provide a power window control circuit capable of stopping its operation during automatic operation.

[Means for Solving the Problems] In order to achieve the above-mentioned object, an instruction for ascending and descending a window is an operation in the opposite direction, and a manual operation is a first stage operation and an automatic operation is a second stage operation. With a window operation part that is operated by two-stage operation, and two non-locking type switching contacts that can be switched to the power supply side or the ground side and are normally connected to the ground side to switch the lifting operation of the window glass automatic lifting drive motor. And the switching contact that enables the operation to move up or down when only one is on the power supply side, and the switching on the corresponding side based on one-step or two-step operation of the window operation part in both directions. The switching contact drive section for switching the contact to the power supply side, and the holding means for controlling the switching contact drive section to hold the connection state of the switching contact to the power supply side, Detecting a two-step operation of the dough operation part to activate the holding means, maintain the connection state of the operation side switching contact to the power supply side and raise the window glass until a predetermined operation release signal is input.
Operation of the window control unit and an automatic control circuit having an open / close detection circuit that detects the fully closed or fully opened state due to descending and sends an operation release signal to the automatic control circuit to switch the switching contact held on the power supply side to the ground side It has operation detection means for detecting the state, and during automatic operation to one side, operation of the window operation part to the other side is performed and the switching contact of the other side is switched to the power source side, and the automatic operation is performed during the first predetermined time while the operation is continued. One of the switching contacts, which is the operating side, is held on the power supply side, the holding state is released after the first predetermined time has elapsed, and both switching operations are performed when the operation to the other is stopped during the first predetermined time. Deactivating the automatic control circuit so that the contact is not held and the switching contact on the other side is not held when the operation of the window operation unit to the other is stopped during the second predetermined time after releasing the hold. Characterized in that it comprises a automatic release control circuit which sends the items.

[Operation] According to the power window raising / lowering control circuit having the above-described configuration, the window operating portion can be operated to drive the switching contact drive portion, and the switching contact can be switched to automatically raise or lower the window glass.

That is, it is possible to drive the motor upward or downward by switching either one of the two switching contacts normally connected to the ground side to the power source side.

Further, the automatic control circuit holds the connection state of the switching contact on the operated side to the power source side by the action of the holding means when the two-step operation of the window operation section in either direction is performed. Then, the connection state is maintained until the open / close detection circuit sends an operation release signal based on the detection of the fully closed or fully opened position of the window glass.

Further, the automatic release control circuit performs the following actions by controlling the supply of the operation release signal to the automatic control circuit based on the detection of the operation state of the window operation unit by the operation detection means.

(B) While the automatic operation to one side is performed, the window operation unit is operated to the other side, and the switching contact on the automatic operation side is held on the power supply side for a predetermined time during the continuation of the operation. Is also connected to the power supply side and the motor drive is stopped.

(B) Continuation of operation of the window operation unit to the other side After a predetermined time has elapsed, the holding state on the power supply side of one of the switching contacts on the automatic operation side is released, and only the other switching contact is connected to the power supply side. By setting the state, the drive motor is driven in the opposite direction.

(C) Continuation of operation to the other side When the operation to the other is stopped within a predetermined time, both switching contacts are not held on the power supply side so that both switching contacts are connected to the ground side and the drive motor is Stop.

(D) When the operation of the other side switching contact is stopped during a predetermined time after the holding of the one side switching contact (while the motor is being driven in the reverse direction), the connection holding of the other side switching contact to the power source side is maintained. If this is not done, the drive motor is stopped by connecting both switching contacts to the ground side.

In this way, when the window operation section is operated to the other side during the automatic operation to the one side by the automatic release control circuit, the automatic operation of the window is stopped in either one-step operation or two-step operation. Can be made.

In addition, it is possible to stop the automatic operation or start the operation in the opposite direction depending on the length of the rising operation duration of the operation of the window operation unit to the other side, which facilitates stopping the window automatic operation. To be

[Embodiment] A preferred embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a circuit diagram showing the overall configuration of the embodiment. The motor drive circuit 40 includes a drive motor 40a and the drive motor 40a.
It is composed of two non-locking type switching contacts S ₁ and S ₂ for switching ON / OFF and switching the driving direction, and is connected to the power source 42.

An operation unit for instructing various kinds of raising and lowering operations of the window by an operator's operation is similar to the conventional operation switch (FIGS. 4 and 5), and includes an up switch and a down switch. . The manual operation is performed by a single-step operation, and the automatic operation is performed by a two-step operation.

That is, the switching contact drive unit (not shown) is interlocked by the switch operation of the window operation unit to switch the contact S ₁ or S ₂ to the power supply side (the side indicated by the broken line in the figure), and the automatic operation is performed. In some cases, the switching contact drive unit is controlled by the solenoid 46, which is a contact holding unit, and the contact state of the contact point S ₁ or S _{2 to} the power supply side is maintained so that the contact point S ₁ or S ₂ is driven to the fully closed or fully opened state.

Next, the automatic control circuit 48 is formed with three comparators C ₁ , C ₄ and C ₅ and a transistor Tr as main constituent elements in addition to the solenoid 46 as the holding means.

The non-inverting input terminal of the comparator C _{5 and} the inverting input terminal of the comparator C ₄ are connected to the connection line of the ground side contacts of the contacts S ₁ and S ₂ . Then, the output sides of the comparators C ₅ and C ₄ are connected to the non-inverting input terminal of the comparator C ₁ , respectively, and both are connected via a diode so that currents flow in opposite directions.

Further, the inverting input terminal of the comparator C ₅ , the non-inverting input terminal of C ₄ , and the inverting input terminal of C ₁ are connected to lines from both ends of the motor 40a. The dividing resistors R ₅ and R ₆ to the inverting input terminal of the comparator C ₅ is, the comparator C ₁
The voltage dividing resistors R ₇ and R ₈ are connected to the inverting input terminal of.

Further, to the inverting input terminal side connection line of the comparator C ₅ is connected to the Zener diode ZD ₁ and the connection line for the inverted input terminal of the comparator C ₁ Zener diode ZD ₂ is connected respectively.

Next, the automatic release control circuit 50 is formed with three comparators and an operation detection switch S that detects the operation state (whether or not the operation is being performed) of the switches of the window operation unit as main components.

The inverting input terminal of the comparator C ₆ is connected between the resistors R ₁₁ and R ₁₂ which are connected to both end lines of the drive motor 40a and the resistor R ₁₃ which is installed on the other end side. And
The non-inverting input terminal of the comparator C ₆ is the operation detection switch S
Resistor R ₉ connected in parallel with and resistor R ₁₀ with one end installed
Is connected between and. The output side of the comparator C ₆ is connected to the inverting input terminal of the comparator C ₂ via the voltage dividing resistors R ₃ and R ₄ , and is also connected to the non-inverting input terminal of the comparator C ₂ via the diode D ₁ . . Further, a capacitor RC ₁ is connected between the diode D ₁ and the non-inverting input terminal of the comparator C ₂ .

The output side of the comparator C ₂ is connected to the inverting input terminal of the comparator C ₃ via the diode D _{2 and} to the base of the transistor TR of the auto control circuit 48 via the forward diode. Further, the capacitor RC ₂ is connected to the inverting input terminal of the comparator C ₃ . The non-inverting input terminal of the comparator C ₃ is connected to the voltage dividing resistor R ₁ and
It is connected to both end lines of the drive motor 40a via R ₂ . The output side of the comparator C ₃ is connected to the base of the transistor TR of the automatic control circuit 48 via a diode in the reverse direction.

The operation of the embodiment having the above configuration will be described based on the timing charts of FIGS. 2 and 3. In addition,
FIG. 2 is a diagram showing the output states of the comparators C ₁ and C _{6 in} the automatic control circuit 48 based on the states of the operation detection switch S and the contacts S ₁ and S ₂ , and FIG. 3 is the window operation unit. FIG. 10 is a diagram showing an operation of each component of the automatic release control circuit 50 during an operation related to the characteristic operation of the present embodiment among various operations of FIG.

In this embodiment, the switching of the contacts S ₁ and S ₂ by the switch operation of the window operation unit is the same as in the case of the conventional device. That is, the switching contact drive unit is operated by the switch operation of the operation unit, linked to the switch operation state during the manual operation, and the connection of the operation side switching contact to the power supply side is held by the solenoid 46 that is the holding means during the automatic operation. Thus, the drive control of the switching contact drive unit is performed.

First, as shown in FIG. 2 (A), the operation detection switch S operates according to whether or not the switch of the operation unit is being operated. That is, it is shown that the open state is maintained during operation and the closed state is maintained during non-operation regardless of manual operation or automatic operation.

FIGS. 2 (B) and 2 (C) show the connection switching state of the contacts S ₁ and S ₂ , and when only one of them is connected to the power supply side, the motor is driven in either direction. Be seen. Therefore, the motor is not driven when both are connected to the ground side or the power source side.

Next, as shown in FIG. 3D, the zener diode ZD ₁ is connected to the non-inverting input terminal of the comparator C ₄ of the auto control circuit 48.
A signal of a constant level is always input by the action of. The inverting input terminal is always supplied with a signal at a lower level than the non-inverting side input terminal. Accordingly, the output of the comparator C ₄ is always Hi (Fig. (E)).

The output of the comparator C ₅ depends on the connection state of the contacts S ₁ and S ₂ as shown in FIG. Inverted input terminal voltage dividing resistors of the comparator C _5, as shown in FIG. 2 (F)
A signal of a constant level determined by R ₅ and R ₆ is input, and only the contact S ₁ or S ₂ is connected to the power supply side at the non-inverting side input terminal, and the drive motor 40a is in the drive state. Only in some cases, a signal having a higher level than the inverting side input terminal is input, and accordingly, the output of the comparator C ₅ outputs the Hi signal while the drive motor 40a is being driven.

The comparator C ₁ is determined depending on the outputs of the comparators C ₄ and C ₃ , as shown in FIGS. 2 (H) and (I),
Comparator C ₁ only when the output of comparator C ₅ is Hi
Since the Hi signal from the comparator C ₄ is input to the non-inverting input terminal of, the output of the comparator C ₁ also becomes Hi when the output of the comparator C ₅ is Hi.

Further, as shown in FIGS. 2 (J) and 2 (K), the output state of the comparator C ₆ of the automatic release control circuit 50 is controlled by the operation states of the operation detection switch S and the contacts S ₁ , S ₂ . That is, the Hi-level signal is input to the non-inverting input terminal of the comparator C _{6 when} the switch of the operation portion is not operated and the operation detection switch S is in the closed state.
Then, when the switch of the operation section is in any operation state, the operation detection switch S is opened, and a signal whose voltage level is slightly lowered by the resistors R ₉ and R ₁₀ is input to the non-inverting input terminal thereof. It On the other hand, one of the contacts S ₁ or S ₂ is connected to the power supply side at the inverting input terminal, and when the motor 40a is driven, it is obtained by the voltage division between the resistor R ₁₁ or R ₁₂ and the resistor R _13. The signal of the voltage level is input. The voltage level at this time is lower than the voltage level input to the non-inverting input terminal side, and the output of the comparator C ₆ is maintained in the Hi state.

Then, when both the contacts S ₁ and S ₂ are connected to the power supply side, the voltage level further rises, and only at this time the voltage level of the input signal on the inverting input terminal side becomes high, and the output of the comparator C ₆ becomes It becomes Lo. Therefore, comparator C ₆
Outputs the Lo signal only when both contacts S ₁ and S ₂ are connected to the power supply side and the switch is operated. next,
The operation of this embodiment will be described with reference to FIG.

Manual Operation First, when either a rising or lowering manual operation is performed, either of the contacts S ₁ or S ₂ is switched to the power supply side.

For example, when the contact S ₁ is a contact for upward drive and the contact S ₂ is a contact for downward drive, the contact S ₁ is switched to the power supply side by manual operation for ascending.

At this time, the solenoid 46 is energized, but the switching contact drive unit described above does not maintain the connection state of this contact S _{1 to} the power supply side, so when the operator stops the switch operation of the operation unit, the contact S ₁ Returns to the ground side and the window drive is stopped. Therefore, in the case of manual operation (one-step operation of the switch), the operation of the drive motor 40a depends only on the operation state of the contact S ₁ or S _{2 which} is linked to the switch operation.

Auto operation Next, when the switch of the operation unit is operated in two stages to perform the auto operation in the ascending direction, the state of each element is the state of the chart portion corresponding to the time T ₁ shown in FIG. 3 (L). Becomes

That is, when the automatic operation (two-step operation) is performed and the hand is released from the switch, the operation detection switch S is closed. Therefore, at this time, the output of the comparator C ₆ is Hi (see ta in FIG. 2 (K)).

At this time, the inverting input terminal of the comparator C ₂ is maintained in the Hi state by the Hi output from the comparator C ₆ . Since the non-inverting input terminal side flows through the diode D ₁ to the capacitor RC ₁ and resistor R ₁₄ side, the diode D ₁
A signal lower than the voltage level on the inverting input terminal side by the amount of potential drop due to is input (FIG. 3 (E)). Therefore, as shown in FIG. 3 (F), the output of the comparator C ₂ is Lo. Therefore, the comparator C ₂
The Lo signal is input to the inverting input terminal of the comparator C ₃ via the diode D ₂ . At this time, the voltage from both ends of the drive motor 40a is divided by the resistors R ₁ and R ₂ and input to the non-inverting input terminal of the comparator C ₃ , but at a voltage level higher than that on the inverting input terminal side. Yes, the output of comparator C ₃ is Hi.

Then, at this time, the output of the comparator C ₁ of the automatic control circuit 48 becomes Hi as described at tb in FIG. 2 (I), the transistor Tr becomes the ON state as shown in FIG. 3 (J), and the solenoid 46 Is energized to control the switching contact drive unit to maintain the connection state of contact S _{1 to} the power supply side and drive motor 40a
The automatic operation of can be continued.

The operation detection switch S changes to an open state or a closed state when the automatic operation (two-step operation) of the switch of the window operation unit is continued or stopped, but only one of the contacts is on the power source side. In some cases, the output of the comparator C ₆ does not change due to this potential change. That is,
When the operation detection switch S is in the open state, the potential on the non-inverting input terminal side of the comparator C ₆ is slightly lowered, but the output is not affected because it is higher than the input voltage level on the inverting input terminal side.

Auto stop operation When the window auto glass reaches the upper end and is completely closed by the above-described ascending auto operation, the drive motor 40
Overcurrent flows in a. As a result, the potential of the inverting input terminal of the comparator C ₄ rises and the output becomes Lo. This changes the output of comparator C ₁ from Hi to Lo. At this time, since the output states of the comparators C ₆ , C ₂ and C ₃ are not changed, the transistor Tr is turned off. This allows the solenoid 4
The energized state of 6 is released, the contact S ₁ returns to the ground side,
Both contacts S ₁ and S ₂ are connected to the ground side, and the drive motor 40a stops driving.

Operation when the switch is operated in the opposite direction during one auto operation (a) When the operation in the opposite direction is continued This state is the transition from T ₁ to T _{2 in} Fig. 3 (L). is there.

First, when only the contact S ₁ is connected to the power supply side and the automatic raising operation is performed, the operation of the switch of the operation unit is performed to the opposite side, and the contact S ₂ is connected to the power supply side. At this time, the output of the comparator C ₆ changes from Hi as shown in FIG.
Change to Lo. This is because when the contacts S ₁ and S ₂ are both connected to the power source side and the switch S is in the open state as described in FIGS. 2 (J) and (K), the potential of the inverting input terminal of the comparator C ₆ is This is because it becomes higher than the inverting input terminal.

The resistance values of the resistors R _{9 to} R ₁₃ are set so that the input to the comparator C ₆ changes as shown in FIG. 2 (J).

Thus, when the output of the comparator C ₆ changes to Lo, the output of the comparator C ₂ changes from Lo to Hi for a predetermined time T ₂ as shown in FIG. 3 (F). This is because when the output of the comparator C ₆ becomes Lo as shown in FIG. 3 (E), the potential of the inverting input terminal of the comparator C ₂ is lowered by the action of the voltage dividing resistors R ₃ and R ₄ . At this time, the potential of the non-inverting input terminal of the comparator C ₂ gradually drops with a predetermined time constant due to the action of the capacitor RC ₁ . By this, the predetermined time
Since the voltage level of the non-inverting input terminal of comparator C ₂ is higher than that of the inverting input terminal only during T ₂ , this predetermined time
The output of the comparator C ₂ becomes Hi only during T ₂ .

At this time, the output of the comparator C ₁ becomes Lo because both the contacts S ₁ and S ₂ are on the power supply side as shown in FIG. 2 (I). However, since the output of the comparator C ₂ is Hi as described above, the ON state of the transistor Tr is maintained (FIG. 3 (J)), and the energization of the solenoid 46 is continued.

If the switch operation on the lower side is continued while the automatic raising operation is being performed as described above, the contacts S ₁ and S ₂ are both held on the power source side for a predetermined time T ₂ , so the drive motor
The drive of 40a is stopped.

It should be noted that the predetermined time T ₂ after even when continuing the above opposite operation, FIG. 3 (L) to the third view corresponding to time T ₃ shown (F) are shown as the output of the comparator C ₂ Changes from Hi to Lo. Due to this change, the transistor Tr is turned off as shown in FIG. When the transistor Tr is turned off, the solenoid 46 is de-energized and the contact S ₁ returns to the ground side. By this return operation, only the contact S ₂ is connected to the power supply side, and the drive motor 40a is driven in the descending operation direction.

Incidentally, the input potential to the non-inverting input terminal of the comparator C ₃ During this time T _3, the time T ₁ in the same manner as in the resistor R ₁ R ₂
The potential drops to a level determined by the partial pressure of. On the other hand, the potential change of the inverting side input terminal gradually changes with a predetermined time constant due to the action of the capacitor RC2 as shown in FIG. Therefore,
The output of comparator C ₃ is the time as shown in Fig. 3 (H).
It is Lo only during T ₃ .

In this way, when the switch operation to the other is continued during one automatic operation and continues until the predetermined time T ₂ and the time T ₃ elapse, the window starts to operate on the opposite side, that is, in the descending direction. Furthermore, the same is true at time T ₄ .

(B) When stopping the operation to the operation opposite side when stopping the switching operation in the reverse direction within a predetermined time T _2, the operation detecting switch S at time T ₅ becomes closed, diagram, time T ₅ It becomes a state. Due to this closed state, the output of the comparator C ₆ changes to Hi (see FIG. 2 (J)). This output change of the comparator C ₆ causes the output of the comparator C ₂ to change from Hi to Lo as shown in FIGS. 3 (E) and (F).

This change in the output of comparator C ₂
The potential of the input terminals of C ₃ is similar change to that described at time T ₃ of FIG. 3 (G), only the time T ₃ the comparator
The output of C ₃ is Lo.

In this way, the output of the comparator C ₁ is maintained in the Lo state, and the output of the comparator C ₂ changes from Hi to Lo, whereby the transistor Tr is turned off. As a result, the holding state of the contact S ₁ is released, both contacts S ₁ and S ₂ are returned to the ground side, and the driving of the motor is stopped.

(C) operation when a reverse switch operation is stopped within the time T _3.

Here, the point different from the case of stopping within the predetermined time T ₂ of (b) is that the output of the comparator C ₁ is as shown in FIG. 3 (I).
It means changing from the Hi state to the Lo state.

Even if the output of the comparator C ₁ changes to Lo, the transistor Tr
The state of is already in the OFF state at time T ₃ , and the OFF state is continued without being affected by the change in the output of the comparator C ₁ .

Therefore, when the reverse operation is stopped and the contact S ₂ returns to the ground side, both the contacts are on the ground side, and the motor drive is stopped.

Therefore, if the reverse operation is stopped within the time T ₃ after the drive motor 40a starts the reverse operation, the lifting / lowering operation of the motion is stopped.

(D) Operation when the switch operation in the reverse direction is continued at T ₄ after the time T _{3 has} elapsed and the reverse operation is stopped at this time T _{4 In} this case, the difference from (c) above At time T ₄ , the potential of the inverting input terminal of the comparator C ₃ further drops and becomes lower than the potential of the non-inverting input terminal as shown in FIG. 3 (G). Therefore, at this time T ₇ , the output of the comparator C ₃ is Hi. Here, when the reverse side operation is stopped, for example, when the reverse side operation is a two-step operation, the output of the comparator C ₃ is Hi and the output of the comparator C ₁ is Hi.
Maintain the state, the connection state of contact S ₂ is maintained on the power supply side,
Time T ₇ after the driving motor 40a continues the downward movement is opposite.

When the operation on the opposite side is a one-step operation (manual operation), when the operation is stopped as in the normal manual operation, the contact S ₂ side returns to the ground side and the drive motor 40a stops.

As described above, according to the present embodiment, when the operation on the contact S ₂ side is continued during the automatic operation of the contact S ₁ side, the window is operated for a predetermined time T ₂ from the start of the operation on the contact S ₂ side. The automatic operation of the glass can be stopped. That predetermined time
Can be automatically lifting operation of the window by the connection to the power supply side contact S ₂ side in T ₂ of the elapsed time after T ₃ and time T _4.

If the operation on the S ₂ side is stopped during the predetermined time T ₂ , the window auto operation can be stopped regardless of whether the operation on the contact S ₂ side is the manual operation auto operation.

Further, the motor drive can be stopped by stopping the operation on the S ₂ side during the predetermined time T ₃ when the drive on the contact S ₂ side is started.

Furthermore, if the operation on the S ₂ side is stopped during the above time T ₄ ,
When the S ₂ side operation is manual operation, the motor is stopped, and when it is auto operation, the S ₂ side automatic operation is performed.

[Effects of the Invention] As described above, according to the power window lift control circuit according to the present invention, when one of the raising and lowering automatic operations is performed, this automatic operation is applied to the opposite side of the window operation switch. It can be stopped easily by operating. In addition, it is possible to set the stop of the ascending / descending operation of the window and the start of the operation in the opposite direction in a predetermined time area according to the duration of the operation on the opposite side. Therefore, the operation performance of the power window lifting device is improved.

[Brief description of drawings]

FIG. 1 is a circuit diagram showing the overall configuration of an embodiment of the present invention, FIG. 2 is a timing chart diagram showing the basic operation of the main constituent parts, and FIG. 3 is a diagram of each constituent part showing the characteristic operation of the embodiment. FIG. 4 is a timing chart, FIG. 4 is a perspective view of a power window master switch mounted on the driver's side of a vehicle, FIG. 5 is an explanatory view showing a switch knob operation of an operation switch, and FIG. It is a circuit diagram which shows an example of a control circuit. 12 ... switch knob S _1, S ₂ ... switching contact S ... operation detecting switch 40a ... driving motor 48 ... Auto control circuit 50 ... automatic release control circuit C ₁ -C ₆ ... Comparator Tr ... transistor

Claims (1)

[Scope of utility model registration request] 1. A window raising and lowering operation is instructed in opposite directions and a manual operation is performed in a first step,
It can be switched to the power supply side or the ground side to switch the window operation part that performs a two-step operation with the automatic operation as the second step operation and the window glass automatic lifting drive motor, and is normally connected to the ground side Two non-locking type switching contacts that enable upward or downward movement when only one is on the power supply side, and one or two stages of the window operation unit in both directions. The window has a switching contact drive unit that switches the corresponding switching contact to the power supply side based on an operation, and a holding unit that controls the switching contact drive unit and holds the connection state of the switching contact to the power supply side. The two-step operation of the operation unit is detected to activate the holding means, and the connection state of the operation side switching contact to the power source side is maintained and the operation state is maintained until a predetermined operation release signal is input. An automatic control circuit that has an open / close detection circuit that switches the switching contact held on the power supply side to the ground side when it detects a fully closed or fully opened state due to rising or lowering of the window glass, and detects the operating state of the window operation unit. It has an operation detection means, and while the automatic operation to one side is performed, the window operation unit is operated to the other side, and the other switching contact is switched to the power supply side, and the operation is on the automatic operation side for the first predetermined time while the operation is continued. One switching contact is held on the power source side, the holding state is released after the first predetermined time has elapsed, and both switching contacts are not held when the operation to the other is stopped during the first predetermined time. State, and when the operation of the window operation unit to the other side is stopped during the second predetermined time after the holding is released, the operation release signal is sent to the automatic control circuit so that the switching contact on the other side is not held. And an automatic release control circuit for sending a signal.