JPH0442212B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention relates to a drive circuit for an electrically foldable door mirror that is attached to the left and right doors of a vehicle and can be raised and lowered by driving the left and right motors, respectively. be.

[Prior Art] Generally, this type of electrically foldable door mirror can be operated from the vehicle interior to raise or lower. Conventionally, a single operating member was provided in the vehicle interior for this purpose. was.

[Problems to be Solved by the Invention] However, in such a conventional device, the left and right motors are simultaneously driven by the operation of the operating member to raise or lower both the left and right door mirrors. The left and right door mirrors cannot be raised or lowered independently, for example, when both the left and right door mirrors are upright, only one of them can be selected and lowered, or when both the left and right door mirrors are lowered. There were problems such as it was completely impossible to select only one of them to stand up.

This invention solves the problems of the above-mentioned conventional ones and provides a drive circuit for an electrically foldable door mirror that can not only raise and lower the left and right door mirrors all at once, but also raise and lower them independently from each other. The purpose is to

[Means for Solving the Problems] In order to achieve the above-mentioned object, this invention is attached to the left and right doors of a vehicle, and is raised by driving the left and right motors that are driven by the operation of a single operating member. , in an electric folding door mirror that can be folded down, a switching means for selecting a motor to be driven by the operation of the operating member; The motor is provided with a timer means for driving the left and right motors, and a timer reset means for resetting the timer means and stopping the drive of the left and right motors when the switching means is switched during the operation of the timer means.

[Function] By employing the above means, the left and right door mirrors are selected by the switching means to raise or lower, and when the switching means is switched during the raising or lowering operation, the door mirrors are immediately at that position. It will be stopped.

[Example] Hereinafter, an example of the present invention shown in the drawings will be described.

FIG. 1 shows an embodiment of the present invention, in which numeral 1 is an automatic return operation switch that can selectively close contacts 2 and 3, and 4 is a logic circuit equipped with NAND circuits 5 and 6 and NAND circuits 7 and 8. ICs 9 and 10 are timer ICs for lowering and raising the left and right door mirrors. This timer IC starts timer operation when the B input and CD input are both "H" and the A input rises from "L" to "H", and makes the Q output "H" for a predetermined time. Also, if the CD input goes "L" while the timer is operating, it will be reset and the Q output will go "L".
Make it. 11 and 12 are timer ICs 9 and 1, respectively.
Transistors 13 and 14 are energized while transistors 11 and 12 are on, respectively, and switch contacts 15 and 16 to the opposite side as shown in the figure.Relays 17 and 18 are installed on the left and right doors of the vehicle, respectively. Built into a door mirror (not shown),
In addition, the left and right motor circuits are connected in parallel between contacts 15 and 16. Motor circuits 17 and 18 respectively lower (or raise) the door mirror when current flows from contact 15 to contact 16, and raise (or lower) the door mirror when current flows from contact 16 to contact 15. It includes a motor (not shown) and a limit switch (not shown) which opens motor circuits 17 and 18 when the door mirror reaches a predetermined folded down position or raised position by driving the motor. Reference numeral 19 indicates a changeover switch disposed between the contact 15 and the motor circuits 17 and 18, and selects one or both of the motor circuits 17 and 18 to connect the contact to the contact 15; Timer depending on switching
This is a timer reset switch that sets the CD input of IC9, 10 to "L", and the operating time of timer IC9, 10 is longer than the time required for the motor circuits 17, 18 to lower the door mirror from the forward folded position to the folded position, for example. It is set to be a little long (for example, about 20 seconds).

Next, the operation of the above will be explained.

First, change the selector switch 19 to both motor circuits 17,
18 in the selection position. Then, when the operating switch 1 is closed to the contact 2 side, both inputs of the NAND circuit 5 become "H", so one input of the NAND circuit 7 becomes "L", and due to input negative logic operation, its output, In other words, A of timer IC9
The input and CD input rise from "L" to "H".
At this time, the B input of the timer IC9 is already "H", so the timer IC9 starts the timer operation and makes the Q output "H", which turns on the transistor 11, energizes the relay 13, and connects the contact 15 to the power supply side. , thereby both motor circuits 17,
18 operates to lower the left and right door mirrors all at once. When the left and right door mirrors reach the predetermined folded position, the motor circuits 17 and 18 are opened and both door mirrors stop at the folded position, and then the timer IC9
ends the timer operation and sets the Q output to "L", so that the transistor 11 is turned off, the relay 13 is demagnetized, and the contact 15 is returned to the ground side.

Next, when the operating switch 1 is closed to the contact 3 side, both inputs of the NAND circuit 6 become "H" and the output becomes "L". One input of the NAND circuit 8 becomes "L" and the output rises from "L" to "H" due to the input negative logic operation, so the timer
IC10 starts timer operation and sets Q output to “H”
As a result, the transistor 12 is turned on, the relay 14 is energized, and the contact 16 is switched to the power supply side, thereby operating both motor circuits 17 and 18 to raise the left and right door mirrors all at once. When the left and right door mirrors reach the predetermined upright position, the motor circuits 17 and 18 are opened and both door mirrors stop at the upright position, and then the timer IC 10 ends its timer operation and sets the Q output to "L". Transistor 12 is turned off, relay 14 is demagnetized, and contact 16 is returned to the ground side.

Also, set the changeover switch 19 to the left motor circuit 17.
If you set the selector switch 19 to the position where only the right motor circuit 18 is selected and perform the above operation, only the left door mirror will rise and fall independently.On the other hand, if you set the changeover switch 19 to the position where only the right motor circuit 18 is selected and perform the above operation, the right door mirror will rise and fall independently. They will stand up and fall down independently. No matter what position the changeover switch 19 is initially in, if the changeover switch 19 is changed during the timer operation of the timer IC 9 or 10, the timer reset switch 20 will change the CD input of the timer IC 9 or 10. is set to "L", so that the operating timer IC 9 or 10 is reset and the Q output is set to "L". As a result, for example, even if the switch is turned to the left side during the timer operation after the right door mirror is completely folded, the left door mirror will not be folded. Also, if the switch is made during the folding operation, the right door mirror will stop at that position.

The above operation is shown in a time chart in FIG.

FIG. 3 shows another embodiment of the invention, in which parts similar to those in FIG. 1 are designated by the same reference numerals as those used in FIG. 1 plus 20. timer
When the A input is "L" and the CD input is "H", and the B input falls from "H" to "L", the ICs 29 and 30 start the timer operation and output the Q output for a predetermined period of time. If the CD input goes to "H" and the CD input goes to "L" while the timer is operating, it will be reset and the Q output will go to "L".
It is becoming more and more like this.

This drive circuit connects the operating switch 21 to the contact 22.
When the circuit is closed to the side, the B input of timer IC29 becomes “H”
CD of timer IC30 as it falls to "L" from
The input also becomes "L", and at this time, the A input of timer IC29 is originally "L" and the CD input is at contact 2.
Since it is on the 3 side, it is definitely “H”, so the timer
IC29 starts timer operation and sets Q output to “H”
On the other hand, the timer IC 30 is reliably reset because the CD input becomes "L", so of both transistors 31 and 32, only the transistor 31 is turned on reliably, energizing the relay 33 and switching to the power supply side at the contact 35. As a result, either one or both of the motor circuits 37 and 38 selected by the changeover switch 39 will operate to invariably lower the corresponding door mirror.

Also, when the operation switch 21 is closed to the contact 23 side, the B input of the timer IC 30 changes from "H" to "L".
At the same time, the CD input of timer IC29 also goes to "L".
At this time, the A input of the timer IC 30 is originally "L" and the CD input is on the contact 22 side, so it is definitely "H", so the timer IC 30 starts the timer operation and makes the Q output "H". On the other hand, the timer IC 29 is reliably reset because the CD input becomes "L", so both transistors 31 and 32
Of these, only the transistor 32 is turned on reliably, energizing the relay 34 and switching the contact 36 to the power supply side, which causes one or both of the motor circuits 37 and 38 selected by the changeover switch 39 to operate. Door mirrors must be erected.

No matter what position the changeover switch 39 is initially in, if the changeover switch 39 is changed during the timer operation of the timer IC 29 or 30, the timer reset switch 4
0 sets the CD input of timer ICs 29 and 30 to "L",
Therefore, the operating timer IC 29 or 30 is reset and the Q output is set to "L".

[Effects of the Invention] Since the present invention is configured as described above, it is possible to raise and lower the left and right door mirrors all at once, as well as to raise and lower them independently from each other. It is possible to select only one of the mirrors in the upright position and make it fall down, or to select only one of the left and right door mirrors and make it stand up while both the left and right door mirrors are in the fall position. Furthermore, even when the door mirror is being raised or lowered, by switching the switching means and activating the timer reset means, the timer means can be reset and the door mirror can be immediately stopped at that position. .

[Brief explanation of drawings]

FIG. 1 is a circuit diagram showing one embodiment of the invention, FIG. 2 is a time chart showing the operation of the device shown in FIG. 1, and FIG. 3 is a circuit diagram showing another embodiment of the invention. 1, 21...operation switch, 2, 3, 22, 2
3... Contact, 4... Logic IC, 5, 6, 7, 8...
...NAND circuit, 9,10,29,30...Timer IC, 11,12,31,32...Transistor, 13,14,33,34...Relay, 15,
16, 35, 36... Contact, 17, 18, 37,
38... Motor circuit, 19, 39... Changeover switch, 20, 40... Timer reset switch.

Claims (1)

[Scope of Claims] 1. An electrically foldable door mirror that is attached to the left and right doors of a vehicle and that can be raised and lowered by driving left and right motors that are driven by the operation of a single operating member, a switching means for selecting a motor to be driven by the operation of a member; a timer means operated by the operation of the operating member to drive the motor selected by the switching means for a predetermined time; 1. A drive circuit for an electrically foldable door mirror, comprising a timer reset means for resetting a timer means and stopping driving of the left and right motors when the switching means is switched. 2. Driving an electrically foldable door mirror according to claim 1, wherein the operating member comprises an automatic return switch that can selectively close either a circuit for driving the motor in forward rotation or a circuit for driving it in reverse rotation. circuit. 3. The electric folding door mirror drive circuit according to claim 1, wherein the switching means is capable of selecting one or both of the left and right motors. 4. A drive circuit for an electrically foldable door mirror according to claim 1, wherein said timer means comprises a timer IC that is reset in response to switching of said switching means.