JPH0130532Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an electric circuit for a power window used in automobiles and the like.

A general example of these drive circuits will be described with reference to FIG.

In the figure, 10, 20, and 30 are first, second, and third switch devices provided at the passenger door, driver's door, and driver's seat, respectively, and are switches 10U and 20U for raising the window, respectively. and 30U (hereinafter referred to as first, second and third up switches), and down switches 10D, 20D and 30D (hereinafter referred to as first, second and third down switches) that lower the window. It consists of a spring hold switch with three contacts.

All normally open contacts (hereinafter referred to as A contacts) 11U, 11 of the switches of these switch devices
D, 21U, 21D, 31U and 31D are connected to the positive terminal of the power supply 40, and all normally closed contacts (hereinafter referred to as B contacts) 22U, 22D, 32U and 32D of the second and third switch devices are
The center contacts 33U, 33D of both switches 30U, 30D of the third switch device 30 are connected to the ground electrode of the power source 40, and the B contacts 12 of the corresponding switches 10U, 10D of the first switch device 10
It is connected to U and 12D by connection wirings 50A and 50B.

14 and 24 are first reversible motors that drive the passenger seat window and driver seat window up and down, respectively.
and a second window motor, both switches 10U, 10D and 20U, 20D of the first and second switch devices 10 and 20, respectively.
Central contacts 13U, 13D and 23U, 23D
motor wiring 15U, 15D and 25U, 25
D, and circuit breakers 16 and 26 are inserted into these wirings.

Note that 60 is a relay inserted in the wiring connecting the positive terminal of the power source 40 and all the switch devices 10, 20, and 30, and is designed to close when an engine key (not shown) is turned on.

In the above configuration, when the A contact 11U of the first up switch 10U is closed, the positive electrode of the power supply 40 → the A contact 1 of the first up switch 10U.
1U → central contact 13U of the switch 10U → motor wiring 15U → first motor 14 → motor wiring 15
D→Center contact 1 of first down switch 10D
3D → B contact 12D of the switch 10 → contact wiring 5
0B→Central contact 3 of third down switch 30D
3D → B contact 32D of the switch 30D → power supply 4
A closed circuit to the ground electrode 0 is formed, the first motor 14 rotates forward, and the window is raised.

Furthermore, when the A contact 11D of the first down switch 10D is closed, the positive terminal of the power supply 40 → the first down switch 10 → the motor wiring 15D → the first motor 14 → the motor wiring 15U → the first up switch 10U. A closed circuit is formed that connects to the connecting wiring 50A, the third switch device 30, and the ground electrode of the power source 40, and the first motor 14 rotates in the reverse direction, lowering the window.

On the other hand, when the A contact 31U of the third up switch 30U is closed, the positive terminal of the power supply 40 → the A contact 31U of the third up switch 30U → the center contact 33U of the switch 30U → the connection wiring 50A → the first up B contact 12U of switch 10U → center contact 13U of switch 10U → motor wiring 1
5U → first motor 14 → motor wiring 15D → center contact 13D of first down switch 10D →
B contact 12D of the switch 10D → connection wiring 50
B→Central contact 3 of third down switch 30D
3D → B contact 32D of the switch 30D → power supply 4
A closed circuit is formed leading to the ground electrode 0, so that the first motor 14 rotates forward and the window is raised.

By the way, the assistant turned the first down switch 10.
Operate D to lower the window and stick a part of your body out of the car through the window, for example, while backing up (all switches are spring hold switches, so at this time the first down switch 1
0D has returned to the hibernation state shown in Figure 1)
, the driver accidentally turned on the third up switch 30.
If the passenger side window is raised by operating U, there is a possibility that part of the passenger's body may be caught in the window.

In this case, the assistant immediately operates the first down switch 10 to lower the window.

However, as shown by the solid line in FIG. 2, the electric circuit at that time is such that the first motor 14 receives a current flowing from the first switch device 10 to the first motor 14 via both motor wirings 15U and 15D. flows, and a closed circuit is not formed. Therefore, the first motor 14 comes to a standstill, and the driver
Unless the operation of the up switch 30U is stopped, a closed circuit in the down direction of the first motor 14 is not formed due to the assistant's operation of the first down switch 10, and a part of the assistant's body is caught in the window. The condition continues.

The present invention is intended to prevent the above-mentioned dangerous inspection, and aims to provide an electrical circuit for a power window in which the down operation of the passenger seat window switch device is given priority over the up operation of the driver's seat window switch device. .

Examples will be described below with reference to the drawings.

As shown in FIG. 3, the third and first switch devices 30 and 10 are switched on
A safety relay 70, which is a one-transient entry relay, is inserted in the middle of the communication wiring 50A that connects the motor circuit 15D and the communication passage 50B. This operation opens the contact 72 of the normally closed communication passage 50A, and connects the first switch device 10 side to the ground electrode of the power source 40.

Next, the operation will be explained.

When the driver operates the third up switch 30U to raise the window and the assistant operates the first down switch 10D to lower the window, a circuit as shown in Figure 4 is formed. Ru.

That is, when the A contact 11D of the switch 10D is closed by operating the first down switch 10D, the power supply 40 → the first down switch 1
A contact 11D of 0D → center contact 13D → motor wiring 15D → coil part 71 of safety relay 70
→Connection wiring 50B→Third down switch 30
A closed circuit is formed from D to the ground electrode of the power source 40,
The operation of the safety relay 70 opens the contact 72 of the normally closed communication passage 50A, cutting off the current from the third up switch 30U to the first switch device 10, and the first
The switch device 10 side is connected to the ground electrode of the power source 40.

As a result, the positive terminal of the power supply 40 → the A contact 11D of the first down switch 10D → the switch 10
D center contact 13D → motor wiring 15D → first motor 14 → motor wiring 15U → center contact 13U of first up switch 10U → said switch 1
A closed circuit is formed from the B contact 12U of 0U to the communication path 50A to the safety relay 70 to the ground electrode of the power source 40, and the first motor 14 rotates in the opposite direction and the window is lowered, so a dangerous situation can be avoided. It is.

In the above description, the explanation has been made regarding raising and lowering the window of the driver's seat and the passenger's seat, but it goes without saying that the present invention can also be used to raise and lower the window of each of the rear seats of a passenger car.

As explained above, according to the present invention, a safety relay is inserted in the middle of the up switch side wiring of the connection wiring that connects the driver's seat switch device and the passenger's window switch device, and the coil part is connected to the passenger's window window switch device. Since the wiring connecting the down switch of the switch device and the motor and the wiring on the down switch side of the connection wiring are connected in the middle, the safety relay is activated by the down operation of the passenger seat window switch device, and the connection is made. The wiring on the up switch side of the wiring is cut off, and the first switch device side is grounded, so the down operation can take priority over the up operation of the driver's seat switch device, and as a result, the assistant's body is pressed against the window. This has the effect of preventing the risk of a part of the body being pinched.

[Brief explanation of drawings]

Fig. 1 is an electric circuit diagram showing the conventional circuit in a rest state, and Fig. 2 is an electric circuit diagram showing the circuit shown in Fig. 1 when the driver's seat switch device is turned up and the passenger seat window switch device is turned down at the same time. figure,
Fig. 3 is an electrical circuit diagram showing an embodiment of the present invention in a rest state, and Fig. 4 shows a case where the driver's seat switch device is turned up and the passenger seat window switch device is turned down at the same time in this embodiment. It is an electrical circuit diagram. 10...First switch device, 20...Second switch device, 30...Third switch device, 1
0U...First up switch, 10D...First down switch, 11U, 11D...A contact, 12U, 12D...B contact, 13U, 13D
...Central contact, 14...First motor, 15U,
15D... Motor wiring, 50A, 50B... Communication wiring, 70... Safety relay, 71... Safety relay coil section, 72... Safety relay contact.

Claims (1)

[Scope of utility model registration request] A first switch device for the passenger seat window, a second switch device for the driver's seat window, and a third switch device for the driver's seat, consisting of a pair of three-contact spring hold switches for raising and lowering the window, for raising and lowering the window; comprising first and second window motors that are reversible motors that drive passenger seat and driver seat windows up and down; the motors are connected to corresponding center contacts of the first and second switch devices, respectively, by motor wiring; All normally open contacts of the first to third switch devices are connected to the positive terminal of the power supply, all normally closed contacts of the second and third switch devices are connected to the ground terminal of the power supply, and the third The center contacts of the first and second switch devices are each connected to the normally closed contacts of the corresponding switches of the first switch device by connecting wires.
By closing the normally open contacts of the switch device, each window motor is activated, and
In the electric circuit of the power window in which the first window motor can be operated also by the third switch device, a safety relay, which is a one-transient entry relay, is inserted into the connection wiring on the up switch side; Each of the coil parts
It is connected in the middle of the down switch side wiring of the motor wiring of the first window motor and the down switch side wiring of the connection wiring, and when the first switch device is down operated, the connection wiring In addition to blocking the first
The switch device side of the first switch device is connected to the ground terminal of the power supply, and the down operation of the first switch device is connected to the third switch device side.
An electrical circuit for a power window, characterized in that priority can be given to the up operation of a switch device.