JPS60199748A - Automatic control device for automobile rearview mirror - Google Patents

Abstract

PURPOSE:To obtain the optimum backward view in a running condition by automatically controlling the right-to-left inclination of a mirror of a rearview mirror device in response to the turning angle of a handle. CONSTITUTION:In response to the turning angle of a handle, resistance value of a variable resistor 11 of a handle turning angle detector increases and a comparator 31 transmits an operation signal for operating a relay 33 and a movable contact 33a of the relay 33 is connected to a normally open fixed contact. As the relay 33 is operated and a relay 34 becomes inoperative, a closed circuit composed of a d.c. supply E, contact 34b of the relay 34, movable contact 34a, motor 22, movable contact 33a of the relay 33, normally open fixed contact 33c and earth is completed, the moror 22 being forwardly driven. The rotation of the motor 22 causes a mirror to be inclined, and the resistance value of a variable resistor 23 increases. As the resistance value increases, the voltage value at the contact (a) increases, and the moror 22 is rotated, until the voltage value at the contact (a) becomes higher than that at the contact (c), so as to set the mirror to the optimum angle.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic rearview mirror control device for an automobile that automatically controls the viewing direction of a rearview mirror installed in an automobile to an optimal tilt position by following the rotation of a steering wheel.

Rearview mirrors such as side mirrors and rearview mirrors installed in conventional automobiles are adjusted and fixed in advance at an optimal tilt position for the driver.

Therefore, the driver could only see the respective specified field of view while driving.

The present invention was invented in view of the above-mentioned drawbacks, and automatically adjusts the sharpness of the rear end mirror by following the direction of the front tires, which indicates the driving condition of the vehicle, or in other words, the rotation angle of the steering wheel. The present invention relates to an automatic rearview mirror control device for an automobile that appropriately controls the left and right inclination angles and provides the driver with a rearward view that is optimal for the driving situation.

DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of an automatic rearview mirror control device for an automobile according to the present invention will be described below with reference to FIGS. 1 to 2(b).

The automobile rear endoscope automatic control device in this embodiment includes a steering wheel rotation angle detection section 1. It is roughly composed of a rear endoscope 2 and a control section 3.

The handle rotation angle detection unit 1 converts the rotation angle of the handle S into an electrical signal, and is composed of a variable resistor 11 that is linked to the rotation of the handle S. In this example,
When the handle S is rotated clockwise, the resistance value of the variable resistor 11 increases in proportion to the rotation angle of the handle S. Also,
The configuration is such that when the handle S is rotated to the left, the resistance value of the variable resistor 11 decreases.

Next, the rear endoscope 2 includes a mirror section 21 . A morph 22 that tilts the mirror portion 21 in the left-right direction. a variable resistor 23 that converts into an electrical signal in conjunction with the rotation of the motor 22; and the variable resistor 23
The adjustment variable resistor 24 is connected in series with the driver and mounted at a position that can be operated by the driver. Said Mori 22
When the sharp part 21 rotates in the opposite direction, the sharp part 21 tilts to the left, and the resistance value of the variable resistor 23 decreases in proportion to the inclination angle of the sharp part 21. Furthermore, when the morph 22 rotates forward, the sharp portion 21 tilts to the right and the resistance value of the variable resistor 23 increases. In other words, the variable resistor 23 is configured to be variable to a predetermined resistance value corresponding to the inclination angle of the acute portion 21.

The control section 3 includes comparators 31 and 32, relays 33 and 34, and resistors R3 to R7. Furthermore, the relays 33, 34 have movable contacts 33a, 34a.

Normally closed fixed contacts 33b, 34b, normally open fixed contacts 33c,
34c and coils 33d and 34d.

The configuration of the control section 3 will be described in detail.

The resistor R1 has one end connected to the positive electrode side of the DC power source E, and the other end connected to the adjustment variable resistor 24 of the rear endoscope 2 via the resistor R2.

The connection point a of the resistor R1 and the seven resistors R2 is connected to the inverting input side of the comparator 31, and the resistor R2 and the adjusting variable resistor 24 are connected to each other.
The connection point S is connected to the non-inverting input side of the comparator 32 via a resistor R1.

The resistor R3 has one end connected to the positive electrode side of the DC power source E, and the other end connected to the variable resistor 11 of the handle rotation angle detection section 1. The connection point between the resistor R3 and the variable resistor 11 is connected to the non-inverting input side of the comparator 31 via the resistor R4, and is also connected to the inverting input side of the comparator 32.

The output side of the comparator 31 is connected to the coil 33d of the relay 33.
It is connected to ground via a resistor R6, and to the non-inverting input side of the comparator 31 via a resistor R6.

The output side of the comparator 32 is connected to ground via the coil 34d of the relay 34, and is also connected to the non-inverting input side of the comparator 31 via a resistor R7.

Normally closed fixed contact 33b of said relay 33,34.

34b is a normally open fixed contact 3334 to the positive pole side of the DC power supply.
c are respectively connected to ground. The morph 22 of the rear endoscope 2 is connected between the movable contacts of the relays 33 and 34.

Next, the operation will be explained.

The voltage values at connection point a and connection point S in FIG.
Determined by Also, the voltage value at the connection point C is the resistance R3
, determined by the variable resistor 11. Here, in order to briefly explain the operation of this embodiment, each of the connection points a + b +
The level relationship of the voltage value of C will be explained as H level, M level, and L level from the highest voltage value.

First, the case where the steering wheel S is held in the straight-ahead position of the automobile M as shown in FIG. 2(a) will be described.

Each of the connection points a at the handle position.

The voltage values of b and c are as follows. That is, connection point a
is at H level, connection point C is at L level, and connection point C is at M level. These connection points a, b.

Due to the voltage level of C, the output signals of comparator 31 and comparator 32 are not output. Specifically, since the comparator 31 has an H level on its inverting input side and an M level on its non-inverting input side, an activation signal for activating the relay 33 is not output, and the movable contact 33a of the relay 33 is 1st
As shown in the figure, it remains connected to the normally closed fixed contact 33b. Furthermore, since the non-inverting input side of the comparator 32 has an M level and the non-inverting input side has an L level, an activation signal for activating the relay 34 is not output, and the movable contact 34a of the relay 34 is As shown in FIG. 1, it is connected to a normally closed fixed contact 34b.

As a result, both ends of the motor 22 in the rear endoscope 2 are connected to the positive electrode, so the motor 22 is held inactive. Thus, the sharp portion 21 of the rear endoscope 2 is held in the rear field of view W of the automobile M, as shown in FIG. 2(a). ”Next, Hough 1 Hell S is converted into a car M as shown in Fig. 2(b).
We will explain the operation when operating to change course to the right.

When the handle S is rotated clockwise, the resistance value of the variable resistor 11 of the handle rotation angle detection section 1 increases in proportion to the rotation angle of the handle S.

In other words, the voltage at connection point C rises to H level,
The voltage level relationship between other connection points a and connection point s is as follows:
The conditions are that connection point a is at M level and connection point A is at L level.

Depending on the voltage level conditions at each of the connection points a + b + c, the comparator 31 outputs an activation signal that activates the relay 33. More specifically, the comparator 31 has its inverting input side at the M level and its non-inverting input side at the H level, and outputs an activation signal for activating the relay 33.

The actuation signal connects the movable contact 33a of the relay 33 to the normally open fixed contact. As a result, the relay 33 is activated and the relay 34 is deactivated, so that the positive terminal of the DC power supply E, the normally closed fixed contact 34b of the relay 34, the movable contact 34a,
Motor 22. A closed circuit is formed between the movable contact 33a of the relay 33, the normally open fixed contact 33c, and the ground, and the motor 22
is driven in forward rotation. By driving the motor 22 in forward rotation,
The sharp portion 21 is tilted rightward as shown in FIG. 2(1)), and the resistance value of the variable resistor 23 increases as the motor 22 rotates forward. As the resistance value of the variable resistor 23 increases, the voltage value at the connection point a increases until it becomes higher than the voltage value at the connection point a or the connection point C. In other words, the voltage value at the connection point a or the H level, the connection point The motor 22 is driven to rotate in the forward direction until C reaches the M level and the connection point reaches the L level. That is, the sharp portion 21 of the rear endoscope 2 is tilted in accordance with the rotation angle of the handle S to provide the driver with an optimal rear view.

Next, the operation when the handle S is rotated to the left will be explained.

When the handle S is rotated to the left, the resistance value of the variable resistor 23 is decreased according to the rotation angle, and the connection point a becomes the H level, the connection point A becomes the M level, and the connection point C becomes the L level, and the comparator 32 activates. A signal is output and the relay 34 is activated.

In other words, the positive electrode of the DC power supply E, the normally closed fixed contact 33b of the relay 33, the movable contact 33a, the motor 22. relay 34
A closed circuit consisting of the movable contact 34a, the normally open fixed contact 34c, and the ground is formed to drive the motor 22 in reverse rotation.

By driving the motor in reverse rotation 1, the sharp portion 21 is tilted and driven to the left, and the resistance value of the variable resistor 23 decreases as the motor 22 rotates in the reverse direction. The reverse rotation and driving of the motor 22 is stopped when the connection point a is at Hl/bell, the connection point is at L level, and the connection point C is at M level.

In the above-mentioned operation, the resistors R5 and R2 have the function of providing hysteresis to the operating voltage levels of the connected comparators 31 and 32, respectively, and stabilizing their operation. Further, the adjustment variable resistor 24 in the rear endoscope 2 is used when the driver arbitrarily adjusts the sharp part 21 to set the optimum inclination angle, and the sharp part 21 can be remotely controlled. Ru.

The automatic rear endoscope control device for automobiles according to the present invention has the above-mentioned configuration 1 and has the following effects.

That is, it is possible to automatically control the sharp part of the rear endoscope to an optimal inclination angle according to the rotation angle of the steering wheel of the vehicle, thereby providing the driver with the optimal rear visibility for the driving situation.

[Brief explanation of the drawing]

1 to 2(b) show an embodiment of an automatic rearview mirror control device for an automobile according to the present invention, in which FIG. 1 is an electric circuit diagram, and FIG. 2(a) and FIG. (b) is an explanatory diagram of the operation. 1... Handle rotation angle detection section, 2... Rear endoscope, 23... Variable resistor, 3... Control section, 31° 32... Comparison vessel. Figure 1 Figure 2 (a) Figure 2 (b)

Claims (1)

[Claims] A steering wheel rotation angle detection unit that detects the rotation angle of the steering wheel of an automobile and derives a rotation angle signal, and a morph that drives the sharp part to tilt left and right, and both detect the tilt angle of the sharp part and derive the tilt angle signal. a rear endoscope having an inclination angle detection section for detecting rotation angle signals;
and a control section outputting a drive signal to the rear endoscope in order to appropriately tilt the tilting angle of the acute part in accordance with the rotation of the rear end mirror.