JPH0420816B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a drive circuit for an electrically foldable door mirror that can be raised and lowered by driving a motor.

[Prior Art] Generally, in this type of electrically foldable door mirror, a motor is driven in response to the operation of an operating member provided in the vehicle interior so that the raised and folded door mirrors can be operated from within the vehicle interior. There is.

[Problems to be Solved by the Invention] However, in such conventional devices, the motor is generally driven only while operating the operating member, so the door mirror cannot be moved to a predetermined upright position or In order to raise or lower the device to the lodging position, it is necessary to continue operating the operating member during that time, which poses problems such as being troublesome and inconvenient to handle.

The present invention solves the above-mentioned problems of the prior art, eliminates the need to continue operating the operating member until the door mirror reaches a predetermined position, and furthermore, eliminates the need for the operating member to be accidentally touched while the door mirror is being raised or lowered. An object of the present invention is to provide a drive circuit for an electrically foldable door mirror that can complete the raising or lowering operation of the door mirror that is currently in progress even if the door mirror is touched.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides an electrically foldable door mirror that can be raised and lowered by driving a motor driven by operation of an operation member. a first timer means operated by the operation of the operating member to drive the motor in the upright direction for a predetermined time; and a second timer means operated by the operation of the operating member to drive the motor in the fall direction for a predetermined time.
and means for continuing the operation of one of the timer means even if the operating member is operated while the other timer means is in operation, and for maintaining the other timer means in a reset state. be.

[Function] According to the present invention, when either the first or second timer means is operated by operating the operating member, the timer means thereafter drives the motor for a predetermined period of time to raise the door mirror in a predetermined manner. Even if the timer means is to be raised or lowered to the raised or lowered position and the operating member is inadvertently touched while the timer means is operating, the timer means continues its operation and prevents the door mirror from being raised or lowered in progress. The lodging operation will be completed to the end.

[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 1 is a single-pole, single-throw switch that can close the circuit between contacts 2 and 3, such as an automatic return push button type operation switch, and 4 is a logic switch.
ICs 5 and 6 are first and second timer ICs. In these timer ICs 5 and 6, the B input and CD input are both "H", and the A input is changed from "L" to "H".
When the timer rises, the timer operation is started and the Q output is set to "H" and "L" for a predetermined period of time, and when the CD input becomes "L" during the timer operation, it is reset and the Q,
This is to set the Q output to "L" and "H". 7,8
are transistors that are turned on during the operation of the timer ICs 5 and 6, respectively, and relays 9 and 10 are excited while the transistors 7 and 8 are on, respectively, and switch the contacts 11 and 12 to the side opposite to that shown in the figure. Reference numeral 13 denotes a motor circuit that is incorporated in a door mirror (not shown) attached to the door of the vehicle and connected between contacts 11 and 12. This motor circuit 13 lowers (or raises) the door mirror when current flows from contact 11 to contact 12, and raises (or lowers) the door mirror when current flows from contact 12 to contact 11 (not shown). It includes a motor and a limit switch (not shown) that opens a motor circuit 13 when the door mirror reaches a predetermined folded down position or raised position as driven by the motor. The operating time of the timer ICs 5 and 6 is set, for example, to be slightly longer (for example, about 20 seconds) than the time required for the motor circuit 13 to lower the door mirror from the forward position to the lowered position.

Next, the operation of the above will be explained.

First, when the power supply is connected, the point rises to "H" with a little delay after V _DD rises to "H". Logic IC4 is
When V _DD rises to "H", either the Q output or the output is initialized to "H" and the other to "L". For example, the Q output of logic IC4 is "L"
If the first timer IC5 is initially set to A
Since the input is "L", the timer operation is not started and the Q output is kept "L", while the second timer
IC6 is "H" from the output of logic IC4 to the A input.
is applied, but since the point has not yet become "H" at this time, the CD input is not "H", so the timer IC 6 does not start timer operation and the Q output is kept at "L". Even when the Q output of the logic IC 4 is initially set to "H" or "L", both timer ICs 5 and 6 are similarly maintained without starting their timer operations.

In this state, operate the operation switch 1 to set the contact 2,
When the circuit between 3 and 3 is closed, the CL input of logic IC4 becomes "H"
Therefore, the output is inverted and the output becomes "H" and the Q output becomes "L". When the Q output of the logic IC4, that is, the A input of the timer IC5 rises from "L" to "H", the B and CD inputs of the timer IC5 are already at "H", so the timer IC5 starts the timer operation. At the start, the Q output is set to "H", so that the transistor 7 is turned on, the relay 9 is energized, and the contact 11 is switched to the power supply side, thereby operating the motor circuit 13 and lowering the door mirror. When the door mirror reaches a predetermined folded position, the motor circuit 13 is opened and the door mirror stops at the folded position.Then, the timer IC5 ends the timer operation and sets the Q output to "L", which turns off the transistor 7 and activates the relay. 9 is demagnetized and the contact 11 is returned to the ground side.

Next, when operating switch 1 is operated to close contacts 2 and 3 again, logic IC 4 changes the CL input to "H".
Therefore, the output is inverted, and this time the Q output is "L",
Q output becomes "H". When the output of logic IC4, that is, the A input of timer IC6 rises from "L" to "H," at this time, the B input of timer IC6 and
Since the CD input is already at "H", the timer IC
6 starts the timer operation and sets the Q output to "H",
Therefore, the transistor 8 is turned on, the relay 10 is excited, and the contact 12 is switched to the power supply side, thereby operating the motor circuit 13 and raising the door mirror. When the door mirror reaches a predetermined upright position, the motor circuit 13 is opened and the door mirror stops at the upright position.Then, the timer IC6 ends its timer operation and sets the Q output to "L", which turns off the transistor 8 and activates the relay. 10 is demagnetized and the contact 12 is returned to the ground side.

Similarly, each time the operation switch 1 is operated, the first and second timer ICs 5 and 6 alternately start the timer operation to raise and lower the door mirror.

For example, when the operation switch 1 is operated to close contacts 2 and 3 while the timer IC5 is operating, "H" is applied to the CL input of the logic IC4, but the logic IC4 is not operating while the timer IC5 is operating. Since "H" continues to be applied from the Q output to the S (set) input, the "H" and "L" of the Q output are not inverted, so the timer IC5 continues the timer operation without any change in the input. On the other hand, the CD input of the timer IC6 is held in the reset state of "L" by its output while the timer IC5 is operating, so even if the operating member 1 is operated while the timer IC5 is operating, the timer IC5 is not activated. continue working,
As a result, the motor circuit 13 completely lowers the door mirror to a predetermined lowering position. Also, if the operation switch 1 is operated while the timer IC6 is operating, the CL input of the logic IC4 will be set to "H".
is applied, but since "H" continues to be applied from the Q output to the R (reset) input of the logic IC4 while the timer IC6 is operating, the Q, output "L",
“H” is not inverted, so timer IC6 continues to operate as a timer with no change in input;
IC5 maintains the CD input in the "L" reset state by its output while timer IC6 is operating, so even if operation member 1 is operated while timer IC6 is operating, timer IC6 will not operate as a timer. As a result, the motor circuit 13 completely raises the door mirror to a predetermined raised 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. The operating switch 21 is a single-pole double-throw switch capable of selectively closing contacts 22 and 23, for example, an automatic return seesaw type switch.

This drive circuit includes a first timer IC 25, a second timer IC 25,
All 26 Q outputs are initially set to "L" and all outputs are initially set to "H". In this state, when the operation switch 21 is closed to the contact 22 side, the timer IC
The A input of the timer IC 25 rises from "L" to "H", and since the B and CD inputs of the timer IC 25 are already "H", the timer IC 25 starts the timer operation and makes the Q output "H". Meanwhile timer
The IC26 is reliably reset because the CD input becomes "L" by the output of the timer IC25, and therefore, of both transistors 27 and 28, only the transistor 27 is turned on reliably, energizing the relay 29 and powering the contact 31. As a result, the motor circuit 33 operates to invariably lower the door mirror.

Furthermore, when the operation switch 21 is closed to the contact 23 side, the A input of the timer IC 26 rises from "L" to "H". starts the timer operation and sets the Q output to "H", while the timer IC25 is reliably reset because the CD input becomes "L" by the Q output of the timer IC26, and therefore both transistors 27,
Of the transistors 28, only the transistor 28 is turned on reliably, energizing the relay 30 and switching the contact 32 to the power supply side, thereby operating the motor circuit 33 to ensure that the door mirror is erected.

For example, when the operation switch 21 is closed to the contact 23 side while the timer IC 25 is operating, "H" is applied to the A input of the timer IC 26, but the timer IC 26 is not connected to the output of the timer IC 25 while the timer is operating. Therefore, since the CD input is kept in the "L" reset state, the timer operation does not start, and since the output of the timer IC 26 is kept "H", the timer IC 25 is not reset.
Therefore, the timer IC 25 continues the timer operation, and the motor circuit 33 completely lowers the door mirror to a predetermined lowering position. Also, the timer
Even if the operation switch 21 is closed to the contact 22 side while the timer of the IC 26 is operating, the timer IC 26 continues the timer operation in the same manner as described above, and the motor circuit 33 completely raises the door mirror to the predetermined upright position. Become.

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

[Effects of the Invention] Since the present invention is configured as described above, when either the first or second timer means is operated by operating the operating member, the timer means thereafter controls the motor for a predetermined period of time. The door mirror is raised or lowered to a predetermined raised position or lowered position through medium drive, so it is not necessary to continue operating the operating member until the door mirror reaches the predetermined position, and the handling is simple and easy. Even if a hand inadvertently touches the operating member while the timer means is operating, the timer means can continue its operation and complete the ongoing raising or lowering operation of the door mirror. It has the following effects.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram showing one embodiment of this invention, FIG. 2 is a time chart showing the operation of the device shown in FIG. 1, FIG. 3 is a circuit diagram showing another embodiment of this invention, and FIG. 4 is a time chart showing the operation of the device shown in FIG. 3; 1, 21...operation switch, 2, 3, 22, 2
3... Contact, 4... Logic IC, 5, 6, 25, 2
6...Timer IC, 7, 8, 27, 28...Transistor, 9, 10, 29, 30...Relay, 1
1, 12, 31, 32... Contact, 13, 33...
motor circuit.

Claims (1)

[Scope of Claims] 1. An electrically foldable door mirror that can be raised or lowered by driving a motor driven by the operation of an operating member, which operates by operating the operating member to move the motor in the rising direction for a predetermined period of time. a first timer means for driving the motor in the lodging direction for a predetermined period of time; a second timer means for driving the motor in the lodging direction for a predetermined period of time; 1. A drive circuit for an electrically foldable door mirror, comprising means for continuing the operation of the timer means even when a member is operated, and for holding the other timer means in a reset state. 2. The electric folding door mirror drive circuit according to claim 1, wherein the operating member comprises a single-pole, single-throw automatic return switch that alternately operates the one timer means and the other timer means. . 3. Driving an electrically foldable door mirror according to claim 1, wherein the operating member comprises a single-pole, double-throw automatic return switch that can selectively operate one of the timer means and the other timer means. circuit. 4. A drive circuit for an electrically foldable door mirror according to claim 1, wherein each of said timer means comprises a timer IC which is operated by said operating member and maintained in a reset state while the other timer means is operating.