CN2516398Y - Automobile rearview mirror angle automatic control device - Google Patents

Abstract

An automatic control device for the angle of a rearview mirror of an automobile is composed of two groups of DC motors and two groups of control circuits; the two groups of DC motors are used to drive the left and right rearview mirrors respectively to adjust their sight angles; the two groups of control circuits respectively control the forward and reverse rotation of the two groups of DC motors, and are respectively linked to the direction light switch on the steering wheel, and the two groups of control circuits include a timing circuit, an input switch, a switching switch, and two groups of driving circuits; the input switch is connected to the input end of the timing circuit and is linked to the direction light switch; the switching switch is connected to the output end of the timing circuit and is linked to the input switch; the two groups of driving circuits are respectively connected to the output end of the timing circuit through the switching switch to drive the DC motor. The utility model can eliminate blind spots in sight, facilitate the driver to grasp the situation behind the car, and ensure driving safety.

Description

Automobile rearview mirror angle automatic control device

technical field

The utility model relates to an automobile rearview mirror, in particular to an automatic control device for the angle of the automobile rearview mirror which can eliminate blind angles of sight, facilitate the driver to grasp the situation behind the vehicle, and ensure driving safety.

Background technique

Ordinary people must pay attention to many basic actions and small details when driving a car, such as the coordinated use of lights, direction lights and rearview mirrors. Taking turning as an example, they must first light up the direction lights to inform the people and cars behind them in advance. The information that it wants to turn, and then use the rearview mirror to understand the situation behind the car, and then turn after confirming that no one is with the car, so as to ensure driving safety.

But the rearview mirror that is equipped on the existing automobile can not make things convenient for the driver to grasp the situation behind the car effectively in the steering process. The reason is that no matter whether the left and right rear mirrors are pushed out automatically or manually, they are located at a fixed angle. When the car turns, the sight angle of the rearview mirror changes with the turning of the car. The dead angle of sight makes the driver unable to effectively grasp the situation behind the car, which has many adverse effects on driving safety.

As can be seen from the above, the rearview mirror on the existing car will have a blind spot when the vehicle turns, which will affect the driver's grasp of the situation behind the car, and then cannot effectively ensure driving safety.

Contents of the invention

In view of this, the main purpose of this utility model is to provide an automatic control device for the angle of the rearview mirror of a car, which can eliminate blind spots of sight, facilitate the driver to grasp the situation behind the car, and ensure driving safety.

In order to achieve the above object, the technical solution adopted in the utility model is:

An automatic control device for the angle of an automobile rearview mirror is characterized in that it is composed of two groups of DC motors and two groups of control circuits; the two groups of DC motors are used to drive the left and right rearview mirrors respectively to adjust their viewing angles; The two groups of control circuits respectively control the forward and reverse rotation of the two groups of DC motors, and are respectively linked with the direction light switches on the steering wheel. The two groups of control circuits include: a timing circuit, an input switch, a switch, two groups of Drive circuit; the input switch is connected to the input end of the timing circuit and linked with the direction light switch; the switching switch is connected to the output terminal of the timing circuit and linked to the input switch; the two groups of driving circuits respectively pass through the switching switch Connect with the output terminal of the timing circuit to drive the DC motor.

When the driver toggles the direction light switch before turning, the corresponding control circuit will be linked to drive the motor to rotate the rearview mirror at an appropriate angle to adjust the rear view angle and eliminate the blind spot. After dialing back, the motor is reversed immediately to reset the rearview mirror.

When the user flips the direction light switch, in addition to turning on the input switch to trigger the timing circuit, and at the same time make the switch switch to switch contacts, so that one of the driving circuits is connected to the output terminal of the timing circuit, and the timing circuit immediately outputs a signal through the drive. The circuit makes the DC motor rotate forward to change the viewing angle of the rearview mirror; when the user turns back the turn signal switch, the input switch and the switch are switched at the same time, then the timing circuit will reverse the DC motor through another set of drive circuits, so that the rear The mirror returns to its original position.

In the aforementioned automatic control device for rearview mirror angles of automobiles, the timing circuit includes a flip-flop, a logic gate connected to the input end of the flip-flop, and an RC circuit connected to a specific pin of the flip-flop. And the RC circuit is used to set the time length of the output signal of the timing circuit, wherein the resistor in the circuit is a variable resistor, and its RC constant can be adjusted to set the rotation angle of the rearview mirror.

In the aforementioned automatic control device for rearview mirror angles of automobiles, the input terminal of the logic gate is connected with a resistor and a capacitor.

Aforesaid auto rearview mirror angle automatic control device, wherein the resistor in the RC circuit is a variable resistor.

The aforementioned automatic control device for the angle of the automobile rearview mirror, wherein the driving circuit is composed of a triode and a relay, wherein the base of the triode is connected to the contact of the switch, and its collector is connected to the excitation coil of the relay. The open end and the ground end are respectively connected to the DC power supply, and the common end is connected to the DC motor.

The utility model can eliminate blind angles of sight, facilitate the driver to grasp the situation behind the vehicle, and ensure driving safety.

Description of drawings

Figure 1 is a schematic diagram of the appearance of the car.

Fig. 2 is a block diagram of the utility model.

Fig. 3 is the implementation circuit diagram of the utility model.

Detailed ways

As shown in Figure 1, the rearview mirror that the utility model refers to is the left and right rearview mirrors outside the two front doors (or the two ends of the engine cover), and the main purpose of the utility model is to make the left and right When the car is turning, the rearview mirror can relatively adjust its line of sight angle to avoid blind spots when the car is turning.

As mentioned above, the rearview mirror on the car includes two groups of left and right, and the utility model also controls the left and right two groups of rearview mirrors respectively. Since the control devices adopted are exactly the same, so the following will only be used for one of the rearview mirrors. The control device is described:

As shown in Figure 2, it is a block diagram of a control device of the present utility model, which includes:

A DC motor 10 is used to drive a rearview mirror to adjust its viewing angle;

A control circuit 20, in order to control the positive and negative rotation of the aforementioned DC motor 10; the control circuit 20 is linked with the direction light switch 30 on the steering wheel; Connected to the input switch 22 linked with the direction light switch 30, a switch 23 connected to the output terminal of the timing circuit 21 and linked with the input switch 22, two groups are connected with the DC motor 10 at the same time and are respectively controlled by the switch 23. Controlled by the drive circuits 24 and 25 of the timing circuit 21.

In this embodiment, the aforementioned input switch 22 is an electronic switch, which is connected in series with the direction light switch 30 and the direction light to form a power circuit. When the directional light switch 30 was conducting, the input switch 22 was also conducting and triggering the timing circuit 21 because of power-on, and the output terminal of the timing circuit 21 sent a signal, because the toggle switch 23 on the output terminal of the timing circuit 21 was connected to the input The switch 22 is linked, so when the input switch 22 is turned on, the common terminal of the switch 23 switches one of the contacts to the other, and the signal sent by the output terminal of the timing circuit 21 will be sent to one of the contacts through the connected contact. Drive circuit 24, utilize this drive circuit 24 to make DC motor 10 do forward rotation, make the rearview mirror controlled by this DC motor 10 rotate an appropriate angle, so that when the car turns, prevent the rearview mirror from appearing the blind angle of vision, make the driver Can still effectively grasp the situation behind the car.

After the automobile resumes going straight, the direction light switch 30 is automatically dialed back, the input switch 22 turns to open circuit immediately, and the switching switch 23 will switch back to the original contact, and the DC motor 10 is driven by another drive circuit 25 for reverse operation, so that The mirrors swivel back to their original positions.

The basic circuit structure and working principle of the present utility model can be understood by the above description. For the detailed circuit structure of the aforementioned control circuit 20, please refer to shown in FIG. 3:

First, the timing circuit 21 includes a flip-flop 211, a logic gate 212 disposed on the input end of the flip-flop 211, and an RC circuit 213 connected to a specific pin on the flip-flop 211; to form an edge trigger timing trigger circuit; where:

The input terminal of the logic gate 212 is connected with a resistor R1 and a capacitor C1, and is connected with the input switch 22;

The resistor in the RC circuit 213 is a variable resistor VR, which is used to adjust its RC constant, and is used to control the time length of the output signal of the timing circuit 21 and indirectly set the forward and reverse angle of the DC motor 10 .

The drive circuits 24, 25 are composed of a triode Q1, Q2 and a relay RL1, RL2 respectively, wherein the bases of the triodes Q1, Q2 are respectively connected to the two contacts of the switch 23, and their collectors are respectively connected to the relays RL1, RL2. The excitation coil is connected, and the output signal of the timing circuit 21 is used to control the excitation of the relays RL1 and RL2;

The common terminals of the relays RL1 and RL2 are respectively connected to the two ends of the DC motor 10, and their normally closed contacts are connected to the ground terminal, and their normally open contacts are connected to the 12V DC power supply.

From the above description, it can be seen that the detailed circuit structure of the control circuit 20 is analyzed as follows:

When the input switch 22 is turned on, the input terminal of the logic gate 212 of the timing circuit 21 changes from a high potential to a low potential to generate an edge trigger, and the switching switch 23 is linked with the input switch 22, so that the contacts are switched, so that the timing circuit 21 The output signal of the flip-flop 211 is sent to the drive circuit 24 through the switch 23. At this time, the relay RL1 of the drive circuit 24 is turned on, and its common end is switched from the normally closed end to the normally open end to connect to the 12V DC power supply, and to the DC motor 10 provides a positive power supply circuit. At this time, the DC motor 10 is running in the forward direction, and its running angle depends on the RC constant of the timing circuit 21.

When the input switch 22 turns into an open circuit, the switching switch 23 linked with the input switch 22 switches back to the original contact. At this time, the input terminal of the logic gate 212 of the timing circuit 21 changes from a low potential to a high potential, and an edge trigger is generated again, so the timing circuit The output signal of 21 is then sent to another drive circuit 25 through the switch 23. At this time, the relay RL1 of the drive circuit 24 is cut off, its common end is switched back to the normally closed end and grounded, and the relay RL2 of the drive circuit 25 is then turned on. The common end is switched from the normally closed end to the normally open end to connect to the 12V DC power supply, and provides a negative power circuit to the DC motor 10 to make the DC motor 10 run in reverse.

It can be seen from the above description that the utility model can adjust the rearview mirror to an appropriate viewing angle before the car turns, thereby preventing the rearview mirror from causing a blind spot when the car is turning, and affecting the driver's perception of the situation of people and cars behind the car. Grasp, so the utility model really contributes to the maintenance of traffic safety, possesses remarkable progress, has novelty, creativity, practicality, so file an application according to law.

Claims (5)

1. A kind of auto rearview mirror angle control device, is characterized in that, is made up of two groups of DC motors, two groups of control circuits; The two groups of DC motors are used to respectively drive the left and right rearview mirrors to adjust their viewing angles; The two groups of control circuits respectively control the forward and reverse rotation of the two groups of DC motors, and are respectively linked with the direction light switches on the steering wheel. The two groups of control circuits include: a timing circuit, an input switch, a switch, Two sets of drive circuits; The input switch is connected to the input end of the timing circuit and linked with the direction light switch; The changeover switch is connected to the output end of the timing circuit and is linked with the input switch; The two groups of driving circuits are respectively connected to the output terminals of the timing circuit through the switching switches, so as to drive the DC motor. 2. The auto rearview mirror angle automatic control device according to claim 1, characterized in that said timing circuit comprises a flip-flop, a logic gate connected to the input end of the flip-flop and a specific connection with the flip-flop. RC circuit connected to the pin. 3. The auto rearview mirror angle automatic control device according to claim 2, characterized in that said logic gate input terminal is connected with a resistor and a capacitor. 4. The auto rearview mirror angle automatic control device according to claim 2, characterized in that the resistor in the RC circuit is a variable resistor. 5. The automobile rearview mirror angle automatic control device according to claim 1, characterized in that said drive circuit is made up of a triode and a relay, wherein the base of the triode is connected with the contact of the switch, and its collector is connected with the relay. The excitation coil of the relay is connected, the normally closed and normally open ends of the relay are respectively connected to the grounding end and the DC power supply, and the common end is connected to the DC motor.

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