JPH0352193Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field The present invention relates to a control circuit for an electric folding mirror that can set or store a door mirror at a predetermined position using a switch. Even if the position is shifted due to the application of some external force when it is at the set position, it is possible to return to the original accurate position with a simple structure.

(b) Prior art Regarding conventional mirror position control,
There were those shown in Japanese Patent Application Laid-open Nos. 58-22418 and 58-53537.

This has a memory comparison circuit which memorizes the most visible position and moves the mirror by comparing it with the current mirror position so that the mirror can always be set in a predetermined position.

According to this, the mirror can be set to the position where it is easiest to see with a single switch operation.

(c) Problems to be solved by the invention In the past, electric remote control mirrors like this were often used in the fender mirrors of automobiles, etc., but with the spread of door mirrors, they were used in door mirrors. It's becoming like that.

In the case of door mirrors, not only the mirror itself is moved up and down and left and right, but also the mirror housing is frequently moved so as to be retracted along the body of the vehicle, such as when parking.

For this reason, the position of the mirror is easier to move than the fender mirror, and it takes a lot of effort to make fine adjustments one by one, and it is necessary to set the mirror to the position where it is easiest to see with a single switch operation.

However, in the prior art, when the mirror is moved by an external force or the like and then returned to its original position, the user has to make fine adjustments.

In addition, the prior art system requires a code output contact, an associated signal line, and a processing circuit in order to extract the position detection signal, resulting in a complicated circuit configuration.

In particular, for door mirrors, the control section, motor, wheel train, etc. must all be housed in a limited volume inside the mirror housing, and there are limits to the number and size of component parts. It was desired that the configuration be as simple as possible.

(d) Means for Solving the Problems The present invention provides an electric motor having a motor, a memory circuit, a storage detection switch, a position detection circuit, a coincidence circuit, a storage switch, a set switch, and a motor drive circuit. In the storage mirror, a set storage circuit stores a signal of a set switch when the mirror housing is not in a stored state from a state of a storage detection switch, a first gate circuit that switches the signal of the set switch to a signal of the storage switch, and the first gate circuit. a second circuit which supplies the output of the set memory circuit to the motor drive circuit as a signal of the set switch when the mirror housing is in the retracted state according to the signal of the retract switch which is switched by the switch;
It has a gate circuit, and only when the mirror is in the retracted state, it receives a signal from the set switch and moves to a predetermined position, and if it deviates from the set position, the mirror is retracted once by the signal from the set switch and then continues. It is characterized by being set automatically.

(e) Embodiments Examples of the present invention will be described below based on the drawings.

FIG. 1 is a diagram showing a control circuit according to an embodiment of the present invention, FIG. 2 is an internal transparent plan view showing an outline of the storage mechanism of an electric storage mirror according to the present embodiment, and FIG. FIG. 3 is an internal transparent side view of the storage mechanism shown in FIG. Incidentally, FIG. 3 shows the storage mechanism shown in FIG. 2 as viewed from the body side of an automobile or the like.

First, the outline of the storage mechanism in this embodiment will be explained using FIGS. 2 and 3.

2 is a mirror housing of a door mirror rotatably attached to the door of the vehicle; 4 is a mirror attached to the mirror housing 2;

Reference numeral 6 indicates a motor mounted within the mirror housing 2, reference numerals 8 and 10 indicate gears driven by the motor 6, and reference numeral 12 indicates a fixed gear that meshes with a gear 10 fixed to the body of the vehicle.

In this storage mechanism, by operating the motor 6 and operating the gears 8 and 10 to rotate the gears 8 and 10, the gear 10 rotates around the outer circumference of the fixed gear 12, and as a result, the mirror housing 2 The whole thing rotates around axis A.

The mirror housing 2 can be rotated clockwise or counterclockwise by rotating the motor 6 in the forward or reverse direction, and by selecting this, the mirror housing 2 can be stored or set. It is possible.

On the other hand, a limit switch 14 is also installed within the mirror housing 2. When the mirror housing is retracted, the limit switch 14 comes into contact with a retraction detection protrusion 16 attached to the fixed gear 12, etc., and turns on, thereby detecting that the mirror housing is retracted.
Further, a gear 18 meshes with the gear 8, and a disk 20 having a plurality of radial slits is also provided on the same shaft as the gear 18.

Further, a photo sensor 22 consisting of a light-emitting element and a light-receiving element forming a substantially U-shape is also provided so as to sandwich the disk 20. The photo sensor 22 detects the rotation of the disk 20, that is, the rotation speed of the motor 6, and generates an electrical signal. is being converted to .

Next, the control circuit will be explained using FIG.

Components shown in FIGS. 2 and 3 are designated by the same reference numerals.

24 is a rotation speed detection circuit that detects the rotation speed of the motor 6 by inputting the signal from the photo sensor 22 shown in FIGS. 2 and 3; 26 is a rotation speed detection circuit 2;
This counter inputs the signal from 4 and outputs the position of the mirror housing 2 as a count value from the storage position.

28 is a memory that stores the position of the mirror housing 2, and the limit switch 14 is in the OFF state (the state in which the mirror housing 2 is not stored).
When an operation signal from the memory switch 32 is inputted through the AND gate 30 which becomes open at this time, the count value of the counter 26 at that time is stored as the position of the mirror housing 2.

Reference numeral 34 denotes a coincidence circuit that compares the output signal of the counter 26 and the contents stored in the memory 28 and outputs a coincidence signal.

36 is a set switch for setting the mirror housing 2 at a predetermined position, and 38 is a storage switch for storing the set mirror housing 2.

Reference numeral 40 denotes a first gate circuit that switches the operating signal of the set switch 36 to the operating signal of the storage switch 38 when the limit switch 14 is in the off state. This first gate circuit 40 inputs a signal from the limit switch 14 via an inverter 42 to one input terminal, and inputs a signal from the set switch 3 to the other input terminal.
The AND gate 44 inputs the operation signal of 6, and the AND gate 44 inputs the signal from the limit switch 14 via the inverter 42 to one input terminal, and inputs the operation signal of the storage switch 38 and the signal from the limit switch 14 to the other input terminal via the diode 46. and an AND gate 48 which inputs the output signal of.

50 is a flip-flop (hereinafter abbreviated as FF)
A one-shot multivibrator 52 which inputs the output signal of the AND gate 44 in the first gate circuit 40 to the set input S and outputs it in synchronization with the rise of the output signal of the coincidence circuit 34. Reset the pulse of input R
is being input.

Reference numeral 54 designates a second gate circuit which outputs the operation signal of the set switch 36 or the output signal of the set storage circuit 50 as a set signal when the limit switch 14 is in the on state (the mirror housing 2 is in the retracted state).

This second gate circuit 54 inputs the signal from the limit switch 14 to each input terminal, and inputs the output signal of the set storage circuit 50 and the operation signal of the set switch 36 to each other input terminal, and connects the diode 56, It is composed of AND gates 60 and 62 which output signals via 58.

64 is a motor drive circuit for driving the motor 6.

This motor drive circuit 64 includes the second gate circuit 5
The output signal of the AND gate 48 in the first gate circuit 40 is input to the set input S. an FF 68 which inputs the coincidence signal from the coincidence circuit 34 to the reset input R;
A coincidence signal is input to each input terminal as it is or via an inverter 70, and to the other input terminal is an FF66,
68 output signals, a fine adjustment switch 76 for finely adjusting the position of the mirror housing 2, and signals from the AND gate 72 and fine adjustment switch 76 are input to diodes 78, 80 and a resistor. A transistor 84 is input to the gate via a diode 82, and a signal from an AND gate 74 and a fine adjustment switch 76 is input to a diode 8.
6 and 88 and a transistor 92 that is input to the gate via a resistor 90, and relay switches 94 and 96 that are turned on when the transistors 84 and 92 are turned on, respectively.

Next, the operation of the control circuit having the above configuration is as follows: (a) When storing the set position of the mirror housing (b) When setting the mirror housing in the retracted position to the set position (c) When storing the mirror housing in the set position (d) When setting the mirror housing that is not in the storage position will be explained separately.

(a) When storing the set position of the mirror housing 2, first the fine adjustment switch 76 is brought into contact with either the upper or lower contact point in the figure to turn on either the transistors 84 or 92.

As a result, when the relay switch 94 is turned on, a current is applied to the motor 6 and it rotates in the forward direction (the mirror housing 2 moves in the setting direction).
When the relay switch 96 is turned on, the direction of current flow is reversed and the mirror housing 2 rotates in the opposite direction (the mirror housing 2 moves in the retraction direction).

In this manner, the motor 6 is operated by operating the fine adjustment switch 76, and the position of the mirror housing 2 (FIGS. 2 and 3) is determined.

At this time, the rotation speed detection circuit 24 detects the rotation speed of the motor 6.
The counter 26 detected the number of rotations of the engine. The position of the mirror housing 2 is output as a count value based on the rotation speed.

When the memory switch 32 is turned on, the output signal of the AND gate 30 becomes H level, and in response, the memory 28 outputs the counter 2.
Store the count value of 6.

(b) When the mirror housing 2 is in the retracted state, the limit switch 14 is in the on state.

In this state, the AND gates 44 and 48 in the first gate circuit 40 are in a closed state, the AND gates 62 and 60 in the second gate circuit 54 are in an open state, the FF 68 in the motor drive circuit 64 is in a reset state, and the AND gate 72 is in a reset state. is in the open state.

When the set switch 36 is operated here, the operation signal is generated in the output signal of the AND gate 62 in the second gate circuit 54, and the diode 58
is applied to the set input S of the FF 66 in the motor drive circuit 64 via the FF 66 in the motor drive circuit 64.

When the signal from this second gate circuit 54 is input, the FF 66 enters the set state, and its output Q
to H level.

The output signal of this FF66 is generated at the output of the AND gate 72 which is normally open, and is generated at the output of the AND gate 72 which is normally open.
8 to transistor 84.

As a result, the transistor 84 becomes conductive, the relay switch 94 is turned on, and the motor 6 is operated.

Therefore, the mirror housing 2 begins to move in the setting direction.

When the mirror housing 2 moves to the set position, the coincidence circuit 34 detects this from the contents of the memory 28 and the count value of the counter 26, and outputs an H level coincidence signal.

A pulse is output from the one-shot multivibrator 52 in synchronization with the rise of this coincidence signal, and this pulse causes the motor drive circuit 6
The FF 66 in the transistor 4 is reset, and the output of the AND gate 72 becomes L level, and the transistor 84 becomes non-conductive. Therefore, the motor 6 is stopped and the mirror housing 2 is moved to the memory 28.
It is set to the set position stored in .

(c) When the mirror housing 2 is in the set position, the limit switch 14 is in the off state.

In this state, the AND gates 48 and 44 in the first gate circuit 40 are in an open state, the AND gates 60 and 62 in the second gate circuit 54 are in a closed state, the FF 68 in the motor drive circuit 64 is in a reset release state, and the AND gates are in an open state. 74 is in an open state.

Here, when the storage switch 38 is operated, the operation signal is generated as an output signal of the AND gate 48 in the first gate circuit 40, and is applied to the set input S of the FF 68 in the motor drive circuit 64.

This FF 68 is set by a signal from the AND gate 48, and its output Q becomes H level. The output signal of the FF 68 is generated at the output of the AND gate 74 and applied to the transistor 92 through the diode 86, making it conductive. When this transistor 92 becomes conductive, the relay switch 96 is turned on, and the motor 6 rotates in the reverse direction to move the mirror housing 2 in the retraction direction.

When the mirror housing 2 reaches the storage position, the limit switch 14 is turned on.
The FF 68 in the motor drive circuit 64 is reset, causing the transistor 92 to become non-conductive and the motor 6 to stop.

(d) When the mirror housing 2 is not in the stored position, that is, in the set state, if the mirror housing is moved by an external force or the like and the count value of the counter 26 no longer corresponds to the position of the mirror housing, Limit switch 14
is in an off state, and the coincidence signal outputted from the coincidence circuit 34 is at H level.

Therefore, the AND gates 44 and 48 in the first gate circuit 40 are in an open state, and the second gate circuit 54 is in an open state.
The AND gates 60 and 62 in the motor drive circuit 64 are in a closed state, and the FF68 in the motor drive circuit 64 is in a reset release state.
AND gates 72 and 74 are in the closed and open states, respectively. When the set switch 36 is operated in this state, an H level operation signal is generated at the output of the AND gate 44, applied to the AND gate 48 via the diode 46, and also generated at the output of the AND gate 48. do.

When the output signals of the AND gates 44 and 48 both become H level, the set storage circuit 50 and
FF68 are set together.

When the FF 68 is set, its output signal becomes H level, the motor 6 rotates in the reverse direction, and the mirror housing is retracted in the same manner as in the operation (c) described above. In this way, the mirror housing 2
When the limit switch 14 is stored, the limit switch 14 is turned on, and thereby the second gate circuit 54
The inner AND gate 60 is opened.

At this time, since the set memory circuit 50 has already been set, the output signal of the AND gate 60 becomes H level and is applied to the FF 66 via the diode 56.

This FF66 is the second gate circuit 54.
It is set by a signal from the output signal to make its output signal H level.

At this time, the AND gate 72 is already in the open state, the motor 6 rotates forward in the same way as the operation (b) described above, and the mirror housing 2 is set at the set position stored in the memory 28. .

Note that the counter 26 is reset when the limit switch 14 is turned on, so
The count value of the counter 26 and the position of the mirror housing 2 correspond again.

As described above, in this embodiment, when the mirror housing that has been set at the proper set position is moved by an external force or the like and the set switch 36 is operated, this operation signal is once switched to the operation signal of the storage switch and the mirror housing is moved. The housing is then retracted and subsequently set to a stored set position.

(f) Effects of the invention According to the invention, misalignment of the mirror due to external force can be easily corrected with a single switch operation.

In particular, the mirror can be reliably stored and set with a simple configuration without using complicated control circuits or code signals.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing a control circuit according to an embodiment of the present invention, FIG. 2 is an internal transparent plan view showing an outline of the storage mechanism of an electric storage mirror according to the present embodiment, and FIG. FIG. 3 is an internal transparent side view of the storage mechanism shown in FIG. 2...Mirror housing, 6...Motor, 14
... Limit switch, 24 ... Rotation speed detection circuit, 26 ... Counter, 28 ... Memory, 34 ...
... Matching circuit, 36... Set switch, 38...
Storage switch, 40...first gate circuit, 50...
...Set memory circuit, 54...Second gate circuit, 6
4...Motor drive circuit.

Claims (1)

[Claims for Utility Model Registration] A motor that is provided in a mirror housing that is rotatably attached to a vehicle door and rotates the mirror housing from a predetermined position to a storage position; Memorizes a predetermined position of the mirror housing. Memory circuit; Storage detection switch that detects when the mirror housing has reached the storage position; Position detection circuit that detects the position of the mirror housing; Detects that the mirror housing has reached the predetermined position stored in the storage circuit. Coincidence circuit: A storage switch that moves the mirror housing to the storage position; A set switch that moves the mirror housing to a predetermined position; Operation of the storage and set switch drives the motor in forward and reverse rotation, and the storage detection switch or A motor drive circuit that stops the motor with the output of the matching circuit; In an electric storage mirror that has; A set memory circuit that stores the set switch signal when the mirror housing is not in the retracted state based on the state of the retract detection switch; A first gate circuit that switches to a signal from the storage switch; when the mirror housing is placed in the retracted state by the signal from the storage switch switched by the first gate circuit, the output of the set storage circuit is supplied to the motor drive circuit as a signal from the set switch. A control circuit for an electric folding mirror, comprising: a second gate circuit.