JPH0613347Y2 - Power window switch - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a switch of a power window device for raising and lowering a window glass by controlling forward and reverse rotations of a window motor, and particularly, during a raising and lowering operation of the window glass. The present invention relates to a device having both a manual operation in which it is necessary to keep turning on the switch with the middle finger and an automatic operation in which once the switch is turned on, the lifting operation is continued even if the finger is released thereafter.

[Prior Art] As a switch for a conventional power window, it is connected to both poles of a wind motor for raising and lowering a window glass, and one of them is closed and the other is opened to rotate the wind motor forward and backward. Each of the ascending side switch and the descending side switch, and an electrical contact holding operation unit for holding a contact when either of these switches is closed,
For example, a solenoid and a mechanical holding member such as a lock member operated by the solenoid, and a rotation sensor for detecting the rotation of the wind motor are provided, and the solenoid is excited by closing the switch, and the rotation sensor is also provided. In some cases, an automatic holding circuit that maintains a current for holding the excited state of the solenoid is provided.

[Problems of the Prior Art] In the switch described above, the other switch is closed at the same time during the automatic state in which the contact is held, that is, when the window glass is moving up or down, and the If it is attempted to stop it in the position and the closing time of the other switch is prolonged, the window motor may reversely rotate simultaneously with the stop of the window glass, so that the window glass may operate in the opposite direction again.

Therefore, an object of the present invention is to provide a switch which can release the automatic state at an arbitrary position while the window is being moved up and down, and which prevents the window from operating in the reverse direction.

[Means for Solving Problems] A power window switch according to the present invention is connected to both a rising side or a falling side manual position or an automatic position, and both poles of a wind motor to raise the knob. Side or descending side manual position, either one of them is closed and the other is opened according to the direction of movement of the knob to open and close the wind motor in the forward and reverse directions. A switch, an electrical contact holding operation unit for holding the contact in a closed state when the knob is moved to the automatic position when the rising side switch or the lower side switch is closed, and rotation of the wind motor is detected. And a rotation sensor for operating the electrical contact holding operation unit by closing the ascending side or the descending side switch, and the electrical contact is made by the rotation sensor. A power window switch equipped with an automatic holding circuit that maintains a current for holding the operating state of the holding operation unit, and is connected to the automatic holding circuit so that the rising side switch and the falling side switch are simultaneously closed. And an AND signal detection circuit that generates an AND signal when the switch is turned on, and the auto holding circuit moves the knob to the manual position on the opposite side in a state where either the up side switch or the down side switch is in the auto state in advance. When the AND signal is input by, the operation state of the electrical contact holding operation unit is input by the AND signal even if the rotation sensor stops detecting rotation by stopping the wind motor. It is characterized in that it is configured to hold continuously.

[Operation of the device] When either one of the rising side switch and the falling side switch (for example, the rising side) is closed in advance and held in the automatic state,
Move the knob to the reverse manual position (for example, descending side),
If the other switch (for example, the descending side) is closed at the same time,
Since both poles of the wind motor have the same pole, their rotation stops.

However, at the same time, since the AND signal is input from the AND signal detection circuit to the automatic hold circuit, the automatic hold circuit does not detect the rotation even if the rotation sensor does not detect the rotation due to the stop of the wind motor. The operating state of the electrical contact holding operation unit is continuously maintained while is input.

Therefore, since the one switch (upward side) remains in the automatic state, as long as the other switch (downward side) is closed while the knob is moved to the reverse manual position, the wind motor has both poles. It has the same polarity and maintains the state where the rotation is stopped and does not cause the reverse rotation.

After that, when the other switch (downward) is opened,
Since the AND signal is not input to the auto holding circuit,
With respect to the one switch (upward side), the operation state holding of the electrical contact holding operation unit by the automatic holding circuit is stopped to release the automatic state, and the upside and downside switches are simultaneously opened.

As a result, the window glass is accurately released at an arbitrary position during the raising and lowering.

[Embodiment] FIGS. 1 to 4 show a circuit example of a power window switch according to an embodiment of the present invention.

As shown in the outline of FIG. 1, this circuit has two terminals, an ascending side switch 20 and a descending side switch 30, which are connected to terminals 12 and 14 forming both poles of a wind motor 10, and both terminals 1.
The AND signal detection circuit 40 is composed of four diodes connected to 2 and 14, the automatic holding circuit 50 connected to the AND signal detection circuit 40, the electrical contact holding operation unit 60, and the rotation sensor 70.

The rising switch 20 has a movable contact 2 that is connected to the terminal 12.
2, a fixed contact 24 on the power source side that selectively contacts and separates from this, and a fixed contact 26 on the ground side. Further, the descending side switch 30 has the same structure and is composed of a movable contact 32 connected to the terminal 14, a fixed contact 34 on the power source side, and a fixed contact 36 on the ground side.

In the AND signal detection circuit 40, the cathodes of the diodes D ₁ and D ₂ are connected, the anodes of the diodes D ₃ and D ₄ are connected, and the cathode of the diode D ₃ is connected to the anode of the diode D _1. With
It is connected to the terminal 12 of the wind motor 10, the cathode of the diode D ₄ is connected to the anode of the diode D ₂ , and is also connected to the terminal 14 of the wind motor 10. The cathodes of the diodes D ₁ and D ₂ are connected to the solenoid 62. The anode of the diode D ₅ is grounded and absorbs the negative surge current of each terminal 12, 14.

The auto holding circuit 50 is provided with transistors Q ₁ and Q _{2 that} are connected to the anodes of the diodes D ₃ and D ₄ through the anode commons of the diodes D ₇ and D ₈ . The transistors Q ₁ and Q are connected to the cathode of the diode D ₅ .

On the other hand, during the rotation sensor 70 and the solenoid 62 via the capacitor _C 1 · _{C 2,} the transistor _Q 3 · _{Q 4} ·
Q ₅ is connected. The base of the transistor Q ₃ and the collector of the transistor Q ₁ are connected, and the base of the transistor Q ₄ and the collector of the transistor Q ₂ are connected. Further, the capacitor C ₃ is also connected to the base side of the transistor Q ₁ . The diode D ₆ connected in parallel with the solenoid 62 absorbs a surge current generated when the solenoid 62 operates and stops, and protects the transistor Q ₅ .

The electrical contact holding operation unit 60 includes a solenoid 62 and a mechanical contact holding member (not shown) for closing and holding the movable contact at the fixed contact on the power supply side by the excitation operation. In this embodiment, the contact holding member is the movable contact 2
Depending on the movement amount of a knob (not shown) for opening and closing 2, 32, it is possible to select a position (automatic position) that operates to hold each movable contact 22, 32 and a non-operating position (manual position). There is.

The rotation sensor 70 is a member for detecting the rotation state of the window motor 10 and maintaining the excitation state of the solenoid 62 so as to maintain the current supply by the automatic holding circuit 50.

Therefore, for example, when the switch 20 is closed, the movable contact 22 is connected to the fixed contact 24 on the power source side and closed, and the wind motor 10 rotates. At this time, the auto holding circuit 5
0 is the diode D of the power supply circuit due to the rotation sensor 70
_As soon as the capacitors C ₁ and C ₂ are charged via ₁ and D ₂ , the transistor Q ₃ is turned on, and the switch inside the rotation sensor 70 is repeatedly turned on and off in accordance with the rotation of the window motor 10 to pulse. Output detection of signal. Therefore, the capacitor C ₁ is the rotation sensor 70.
The charging and discharging are repeated in accordance with the above, and the capacitor C ₂ is also charged and discharged (charged when the capacitor C ₁ is discharged), so that the base of the transistor Q ₃ is always biased and the ON state is maintained. To do. When the transistor Q ₃ is turned on, the transistor Q ₄ is turned off and the transistor Q ₅ is turned on,
The solenoid 62 is activated. Therefore, fixed contact 2
The closed state with 4 is maintained, and the automatic holding state is established. In the transistors Q ₁ and Q ₂ , the signal of the power source due to the cathodes of the diodes D ₁ and D ₂ is the diode D ₃ of the AND signal detection circuit, and the terminal 1 of the wind motor 10.
Since it is grounded via 2 and the fixed contact 36, it is in an OFF state without being biased. Here, the anode and cathode of the diode D ₄ of the AND signal detection circuit are in the OFF state with the same potential.

After that, when the wind glass goes up and the wind motor 10 stops rotating, the pulse frequency decreases,
The rotation of the rotation sensor 70 decreases, the discharge time of the capacitor C ₁ becomes longer, and the discharge of the capacitor C ₂ is completed (discharging due to the time constant of the capacitance of the capacitor C ₂ and the resistor R ₁ ), then the base of the transistor Q ₃ is discharged. The potential drops and OF
It becomes F. Then, the transistor Q ₄ is turned on, the transistor Q ₅ is turned off, and the operation of the solenoid 62 is stopped. Therefore, the holding state by the contact holding member (not shown) is released, the movable contact 22 is opened, and the automatic holding state is released.

Next, the arbitrary position releasing function will be described. This function is achieved by closing one switch and opening and closing the window glass in the auto holding state, while closing the other switch and operating simultaneously to the reverse rotation side (hereinafter, reverse manual position). It is possible to release the auto holding state at any stage.

That is, as shown in FIGS. 3 to 4 for opening and closing the contacts, the movable contact 22 on one side is mechanically held by the operation of the solenoid 62 in the automatic holding state in which the switch 20 is closed. Therefore, when the switch 30 is rotated to the reverse manual position, the movable contact 32 also turns to the power supply side (FIG. 4). Therefore, the wind motor 10
Since both terminals 12 and 14 are on the power source side, the wind motor 10 stops and the pulse generation of the rotation sensor 70 also stops. At this time, since the terminals 12 and 14 simultaneously become the power supply potential, the anodes and cathodes of the diodes D ₃ and D ₄ become the same potential, and the diodes D ₁ and D ₄ are turned off.
The signal of the power source by D ₂ is no longer grounded through the diode D ₃ of the AND signal detection circuit. That is, when the diodes D ₃ and D ₄ are both in the AND state of the power supply potential, the bases of the transistors Q ₁ and Q ₂ in the automatic holding circuit 50 are
The AND signal of the diodes D ₃ and D ₄ is input. Then, the transistor Q ₂ is turned on immediately, and the transistor Q ₁ is turned on after charging the capacitor C ₃ . When the transistor Q ₁ is turned on, the capacitor C ₂ is discharged via the transistor Q ₁ and the transistor Q ₃ is turned off without being biased. In this way, by turning on the transistors Q ₁ and Q ₂ , the capacitor C ₁
A delay time (for example, 0.21 ± 0.07) so that the electric charge of C ₂ is discharged and the movable contacts 22 and 32 are simultaneously grounded.
Seconds).

Moreover, since the transistor Q ₂ is turned on,
Since the transistor Q ₄ is turned off and the transistor Q ₅ is turned on, the solenoid 62 is operated. Therefore, even if the pulse signal is stopped, the solenoid 62 still holds the operating state. Therefore, the automatic holding state of the switch 20 is not released, and as a result, the movable contact 22 does not return to the ground side, so that the window motor 10 does not reverse even if the switch 30 is closed for a relatively long time. Therefore, the wind motor 10 can be accurately stopped at any stage in the middle of the automatic state. Therefore, it is possible to prevent the window glass from unintentionally operating in the opposite direction after the lifting and lowering of the window glass is stopped.

After that, when the switch 30 is returned from the reverse manual position to the neutral position, the transistor Q ₂ is turned off and the operation state of the solenoid 62 is released. Both switches 20,
Only after 30 has been opened can it operate in the opposite direction. Further, since the movable contacts 22 and 32 are grounded at the same time, no malfunction occurs.

It should be noted that after the transistor Q ₂ is turned off, the capacitor C ₃ is discharged for a predetermined time (for example, 0.5 ± 0.1 seconds).
After that, the transistor Q ₁ is turned off. Therefore, even if the switch 30 side is set to the automatic state within the time when the transistor Q ₁ is ON, the solenoid 62 is in the stopped state.
It does not become the auto holding state. Therefore, when the automatic holding state is released at an arbitrary position, the knob is returned from the reverse manual position to the neutral position once, but at this time, even if the knob is accidentally moved further to the reverse automatic position, the solenoid 62 is stopped. If it is within the time, it is possible to prevent jumping into the reverse auto state.

[Advantage of the Invention] The power window switch according to the present invention moves the knob to the reverse manual position when either one of the ascending side switch and the descending side switch (for example, the ascending side) is closed and kept in the automatic state. By moving, the other switch (for example, the lower side) can be closed at the same time, and the rotation of the wind motor can be stopped. Moreover, even if the wind motor stops rotating, the operating state of the electrical contact holding operation unit of the one switch (upward side) is held by the AND signal input from the AND signal detection circuit to the automatic holding circuit. Therefore, the auto state can be maintained.

Therefore, even if the knob is moved to the reverse manual position, the wind motor does not rotate in the reverse direction, and it can be accurately released at an arbitrary position during the raising and lowering of the window glass so as to suit the user.

[Brief description of drawings]

1 to 4 show an embodiment of the present invention, FIG. 1 is a schematic diagram of a circuit configuration, FIG. 2 is a concrete circuit diagram, and FIGS. 3 to 4 are action diagrams of a contact portion. is there. (Explanation of symbols) 10 ... Wind motor, 20, 30 ... Switch, 4
0: AND signal detection circuit, 50: Auto holding circuit,
60: Electrical contact holding operation unit, 70: Rotation sensor

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Toru Tanaka, Toru Tanaka 1000 Otagaya, Tsurugashima-cho, Iruma-gun, Saitama Prefecture Toyo Denso Co., Ltd. at the Tsurugashima Plant (72) Sadayoshi Oshima, 1000 Otagaya, Tsurugashima-cho, Iruma-gun, Saitama Toyo Denso Co., Ltd., Tsurugashima Plant (72) Minor Mohri Minoru 1000 Otagaya, Tsurugashima-cho, Iruma-gun, Saitama Toyo Denso Co., Ltd., Tsurugashima Plant

Claims (1)

[Scope of utility model registration request] 1. A knob that can be moved to each manual position or automatic position on the ascending side or the descending side, and is connected to both poles of a wind motor, and when the knob is moved to either the manual position on the ascending side or the descending side, Depending on the moving direction of the knob, one of the switches is closed and the other is opened to rotate the wind motor forward and backward, and each switch on the up and down sides and the knob when the up or down switch is closed. The electric contact holding operation unit for holding the contacts in the closed state when the motor is moved to the automatic position, the rotation sensor for detecting the rotation of the wind motor, and the closing of the ascending side or descending side switch. The automatic maintenance that activates the electric contact holding operation unit by maintaining the electric current and maintains the current for holding the operating state of the electric contact holding operation unit by the rotation sensor. A power window switch including a holding circuit, and an AND signal detection circuit that is connected to the automatic holding circuit and generates an AND signal when the rising side switch and the falling side switch are simultaneously closed, The auto holding circuit stops the wind motor when the AND signal is input by moving the knob to the manual position on the opposite side in a state where either the up side switch or the down side switch is set to the auto state in advance. Thus, even if the rotation sensor does not detect rotation, the operating state of the electrical contact holding operation unit is configured to be continuously held while the AND signal is input. Switch for windows.