JPS6140574B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic angle changing device for an electric remote control mirror for an automobile.

Car mirrors, such as back mirrors,
Normally, the angle position is adjusted in advance to the best angle for the driver to check rearward during normal driving.
This position is hereinafter referred to as an eye point, and when the vehicle is not driving normally, it is often necessary to tilt the mirror from this eye point to change its angle to enlarge or change the field of view.

For this reason, an electric remote control mirror has been proposed in which the mirror outside the vehicle is remotely controlled and angled from the driver's seat inside the vehicle.

However, this type of conventional vehicle simply keeps tilting the mirror up and down or left and right while the switch is turned on, so the driver can drive with one hand while visually checking the mirror while using the other. The switch must be operated with one hand, which is extremely dangerous during actual driving. In particular, it is necessary to change the field of view of the mirror when the vehicle is not driving normally, such as when entering a highway or changing lanes when passing, so it is easy to understand that such an operation is dangerous. Moreover, after changing the field of view, it is extremely difficult to return the mirror to the correct eye point while driving, and not only is this operation dangerous, but the inability to return the mirror to the correct eye point impairs safe driving. This will cause problems.

In order to improve these points, a timer for tilting the mirror is used to tilt the mirror to a desired position, a timer for setting a stop time is used to stop the mirror at the tilted position for a desired time, and a timer for returning is used to tilt the mirror to the desired position. It has been proposed to incorporate a time sequence control circuit that automatically returns the mirror into the mirror drive mechanism (Japanese Patent Application Laid-open No. 135338/1983).

In this way, it should be possible to automatically return to the original eye point if the timer setting time for going out and returning is the same, but in reality, timers of the same brand from the same manufacturer However, there is a problem in that, due to manufacturing errors, there are very slight variations in performance, and the eye point does not return to the correct original position, and the eye point gradually becomes erroneous with repeated use.

Moreover, many automobile mirrors, such as rearview mirrors, come in pairs of left and right mirrors, and it becomes necessary to incorporate such a control circuit for each mirror, which also causes an increase in costs.

In view of the above circumstances, a further object of the present invention is to enable accurate return of the mirror to its original angular position and to reduce costs.

An embodiment of the present invention will be described below with reference to the drawings.

This example is a rearview mirror for an automobile, which is a pair of left and right mirrors. FIG. 1 shows a block diagram of this example circuit. That is, the drive mechanism for tilting the right side mirror 1a or the left side mirror 1b incorporates a time sequence control circuit having an angle adjustment timer 2 and a stop time setting timer 3, each of which is set at an arbitrary time in advance.
As the drive mechanism, an electric motor, a mechanism for transmitting the drive, a clutch switching circuit, etc. can be used. Since the time of the angle adjustment timer 2 and the drive displacement by the drive mechanism are proportional, the time can be set so that the angle is shifted to the desired position, and the stop time can also be determined as necessary. can.

That is, when the start switch of the operation circuit 4 is closed, the angle adjustment timer 2 is activated and the mirror 1 is turned on.
A or 1b is angled to a desired position, and then stopped for that time by the stop time setting timer 3. Next, the angle adjustment timer 2 operates again, but this time the drive mechanism operates in the opposite direction, and the mirror 1a or 1b
return to its original position. In this case, since the reciprocating time is set using the same timer 2, the angle is returned accurately by the amount of angle change, and a precise return to the original position is achieved. A pair of start switches of the operating circuit 4 are provided to determine which of the left and right mirrors 1a and 1b to be moved, and a switching circuit 41 is provided for switching.
Therefore, the same control circuit is used for both the left and right mirrors 1a,
1b, it is possible to reduce costs.

FIG. 2 shows a detailed circuit diagram of this example.

SW ₁ in the figure is the start switch for the right side mirror.
SW ₃ is a start switch for the left side mirror, SW ₂ is a switch for changing left/right or up/down angle, and A, B,
C and D are each relays. a ₁ and a ₂ are contacts of relay A, b ₁ to b ₄ are contacts of relay B, c ₁ to c ₄ are contacts of relay C, and d ₁ to d ₈ are points of relay D.
21 is a trigger circuit for driving the angle adjustment timer, 22 is a trigger circuit for driving when returning, 31 is a trigger circuit for driving the stop time setting timer 3, and 5 is a stop trigger circuit. VR ₁
is a variable resistor for setting the time of the angle adjustment timer 2, and VR ₂ is a variable resistor for setting the time of the stop time setting timer. Reference numerals 6a and 6b are manual switches that can be used to set the eye point in advance, and are for the right side mirror and the left side mirror, respectively.
Sa and Sb are solenoids for driving the mirror up and down, and are set to tilt the mirror up and down, and in other cases to tilt left and right. be.

This effect will be explained below.

First, the driver manually sets the eye point of the remote control mirror so that it is suitable for normal driving. This is manual switch 6
Right or left mirrors 1a, 1b at a, 6b respectively
This is achieved by making adjustments. Next, the angle required for each driver when entering the expressway, changing lanes when overtaking, checking the shoulder of the road, etc. is converted into time and set in variable resistance VR ₁ . Also, set the desired stopping time of the mirror to VR ₂ .

When you want to change the right mirror 1a to a desired angle in the above state, turn on the start switch SW ₁ for the right mirror, the relay C will be energized, and the relay C will be closed by closing the contact c ₁ . C
is self-holding, and at the same time the other contacts c ₂ to
The manual switch circuit is cut off from the state shown in the figure by the action of _c4 . At the same time, an angle adjustment timer 2 is connected via a trigger circuit 21 that generates a single pulse.
is driven, and relay A is energized. Therefore, contacts a ₁ and a ₂ of relay A are closed and connected to the power source and ground, respectively, and the circuit for driving the motor Ma is energized, so that the motor Ma rotates normally and the right mirror 1a is angled. This angle adjustment is performed for the time set by the angle adjustment timer 2, and when the timing ends and the desired angle adjustment is completed and the mirror 1a reaches the desired position, the motor
Ma stops. Motor Ma stops, i.e. timer 2
At the same time as the timing ends, the stop time setting timer 3 is activated by detecting the rear engine in the output waveform of the timer 2, and the relay B is also activated accordingly. Therefore, relay B operates and its contacts b ₃ and b ₄ are switched, and as is clear from the figure, a circuit is formed in which the current to motor Ma is reversed.
b ₂ has fallen toward the stop trigger circuit 4, and in this state, the motor Ma is not yet activated. However, when the timer 3 finishes counting, the trigger circuit 22
detects the rear engine of the timer 3 and drives the angle adjustment timer 2 again. The operation of timer 2 energizes relay A, and its contacts
A ₁ and a ₂ are closed to energize motor Ma, and at this time, contacts b ₃ and b ₄ have been switched as described above, so motor Ma is in the same position as it was during the previous angle change. It rotates in the opposite direction and acts to return the mirror 1a to its original eye point. In this case, the angle change is also performed for the time set by timer 2, but since the previous angle change was also performed by this same timer 2, the motor Ma operates for exactly the same time, and therefore the mirror 1a is The angle of displacement is also exactly the same, just in the opposite direction, so mirror 1a is precisely returned to its original position.
will be able to return. When mirror 1a returns to the original eye point and timer 2 finishes counting,
Stop trigger circuit 5 detects the rear edge of the output waveform of timer 2, resets the circuit of timer 2, releases the self-holding of relay B, and releases the self-holding of relay C, and returns to the initial state. .

When operating the left mirror 1b, press the start switch SW ₃ for the left mirror, and make the relay D self-hold by the contact d ₈ of the relay D. Since _d1 is closed due to this self-holding, relay C is also energized. At the same time, contacts d ₂ , d ₃ , and d ₄ are also switched to the circuit for the left mirror, and eventually the following right mirror 1a
This function is the same as that explained above.

However, it is of course possible that the desired set displacement angles of both mirrors 1a and 1b are different. In other words,
Naturally, a difference between the optimum horizontal displacement angle of the right mirror and the left mirror can occur due to the difference between the left and right mirrors, but the illustrated circuit does not include a circuit for such a difference. . However, in this case, a switch (for example, an arbitrary switch such as a switch for moving the right mirror 1a in the left-right direction by 3 degrees) may be provided on the VR ₁ and the power supply side. Similarly, VR ₁ ′, VR ₁ ″, VR ₁ in parallel
By providing a switch on the power supply side and making adjustments using this switch, the left and right deflection angles can be made different, thus meeting the intended purpose.

As described above, according to the present invention, by simply turning on the start switch temporarily, the angle is automatically changed by a preset angle, and after stopping for a set time, it naturally returns to the original position. However, in the present invention, a common timer is used for moving forward and returning when the angle is changed, so the mirror can always be returned to the correct original position, and therefore the eye point can be maintained even after repeated use. There is no risk of going crazy.
Furthermore, a pair of left and right start switches are used, and the pair of switches is shared by the angle control circuit, and when either switch is turned on, the left or right mirror is selected accordingly. Since the switching circuit is provided, it is possible to provide a variable angle control device which is relatively inexpensive and has high value.

[Brief explanation of the drawing]

1 and 2 show an embodiment of the present invention,
FIG. 1 is a block diagram thereof, and FIG. 2 is a detailed circuit diagram. 1a, 1b...Mirror, 2...Angle adjustment timer, 3...Stop time setting timer, 4...Operation circuit, 41...Switching circuit, SW ₁ , SW ₂ ...Start switch, A, B, C , D...Relay, VR ₁ ,
VR ₂ ...Variable resistor for time setting.

Claims (1)

[Claims] 1. A time sequence control circuit having an angle adjustment timer and a stop time setting timer is incorporated into the drive mechanism of the remote control mirror, and the setting time of each timer is adjustable, and the angle adjustment timer is activated by turning on the start switch. The mirror is angled for a set time, then the mirror is stopped at that angular position for the time set by the stop time setting timer, and then the mirror is reversely driven for the time set by the angle adjustment timer to automatically return the mirror. By using the same angle adjustment timer for reciprocating the angle change, it is possible to accurately return to the original position, and one pair of the start switches are provided,
Automatic angle changing control for an electric remote control mirror, characterized in that a switching circuit is provided to select either the left or right mirror when either of the switches is turned on, and the control circuit is shared by the pair of mirrors. Device.