JPH0418575B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Field of Industrial Application> The present invention relates to an automatic storage control device for a door mirror of an automobile, etc., which uses a motor to fold down the door mirror of an automobile or the like into a storage position and raise it to a use position.

<Prior art> This type of automatic door mirror retraction control device uses a retractable operation switch to change the current direction of a reversible motor that rotates a visor that houses the mirror, and generally the retractable operation switch is placed on the retraction side. When the visor is turned to the desired position, the visor rotates toward the retracted position, and when the visor is operated toward the use side, the visor rotates toward the use position, and when the visor is rotated to the desired position, the retractable switch can be operated. By stopping the visor, the visor is configured to stop in that position.

<Problems to be Solved by the Invention> In the above-mentioned conventional technology, it is necessary to continue operating the retractable switch until the visor reaches the desired position, and when stopping the visor at the use position, the position must be visually confirmed before stopping. This makes it difficult to stop at an accurate position. Furthermore, because the folding angles of the door mirrors on both sides of the vehicle body, that is, the angles between the use position and the storage position, are different, it is possible to control both the driver's side and passenger side door mirrors with a single folding operation switch. First, it is necessary to separately provide a foldable operation switch.

The present invention solves these problems by providing an automatic retraction control device that is easy to operate, easy to stop at an accurate position, and can control left and right door mirrors with a single foldable operation switch. It was made for the purpose of providing.

<Means for Solving the Problems> In order to achieve the above object, the present invention includes a reversible motor that rotates the visor in the direction of the use position and the direction of the storage position, and a reversible motor that operates in accordance with the rotation of the visor, A first position switch that is turned off in the use position and turned on at least from the storage position to just before the use position, and a second position switch that is turned off in the storage position and turned on from the folding position to just before the storage position. , a self-returning type retractable operation switch for selecting the rotation direction of the reversible motor, and a contact point for switching the current direction of the reversible motor, each connected to a power source via the reversible operation switch. a first self-holding circuit connected in series with the first position switch or the second position switch and activated when the visor rotates from the storage position to the use position in response to operation of the retractable operation switch; , and a second self-holding circuit that operates when the visor rotates from the folding position or the use position toward the storage position.

<Function> In the device of the present invention, when the retractable operation switch is operated to the use side when the visor is in the retracted position, the first self-holding circuit is activated and the reversible motor is rotated from the retracted position to the use position. A driving current flows in the direction of rotation to self-hold this state, and when the visor reaches the use position, the first position switch is turned off, the self-holding is released, and the visor stops. Furthermore, if the retractable operation switch is operated to the storage side when it is in the use position or the retractable position, the second self-holding circuit is activated and a drive current opposite to the above flows through the reversible motor, and the visor is As the visor rotates from the use position toward the storage position, it is self-maintained, and when the visor reaches the storage position, the second position switch is turned off, the self-retention is released, and the visor stops.

<Example> The present invention will be specifically described below with reference to illustrated examples.

FIG. 1 shows an embodiment of a basic circuit, and FIG. 2 shows an example of a position switch for position detection.

In Fig. 2, 1 is a visor housing a mirror, 2 and 3 are fixed contacts, and 4 and 5 are movable contacts, and the contacts 2 and 4 are used to switch the first position switch Ps ₁
However, the second position switch is also activated at contacts 3 and 5.
Ps ₂ is configured. Note that the position switches Ps ₁ and Ps ₂ may be constructed by a combination of a cam and a micro switch. N and R indicate the use position where the visor 1 is upright (hereinafter referred to as the N position) and the storage position where the visor 1 is folded backwards (hereinafter referred to as the R position), respectively, and F is the folded position where the visor 1 is folded forward by external force (hereinafter referred to as the R position). The rotation from the R position to the N position and from the F position to the R position is performed by a rotation motor. The first position switch Ps ₁ is configured to be on from the R position to just before the N position and off from the N position to the F position, and the second position switch Ps ₂ is configured to be from the F position to just before the R position. It is configured to be on until just before the position and off at the R position. Note that the position switch Ps ₁ only needs to be off at the N position, and may be on from the N position to the F position.

In Fig. 1, 11 is a reversible motor provided in the visor 1, 12 is a retractable operation switch, and Re ₁ is a reversible motor provided in the visor 1.
is a first relay constituting a first self-holding circuit,
Re ₂ is a second relay constituting a second self-holding circuit, and the reversible motor 11 is connected to the power source via switching contacts Ry ₁ and Ry ₂ of the relays Re ₁ and Re ₂ ,
By switching one of the contacts Ry ₁ and Ry ₂ , the polarity of connection to the power source can be switched. Furthermore, the series circuit of the diode D ₁ , the first relay Re ₁ and the first position switch Ps ₁ and the series circuit of the diode D ₂ , the second relay Re ₂ and the second position switch Ps ₂ are each reversible. The normally open contacts N and R of the retractable operation switch 12 are connected to the motor 11 in parallel with opposite polarities of the diodes, and the normally open contacts N and R of the retractable operation switch 12 are connected to the connection point of the relay Re ₁ and the diode D ₁ and the connection point of the relay Re ₂ and the diode D ₂ . A common contact C of the retractable operation switch 12 is connected to each connection point.
is connected to one terminal of the power supply. The retractable operation switch 12 may be a type of switch in which the common contact C contacts either contact N or R only when operated, and returns automatically when the hand is released, such as a single-pole double-throw type toggle momentary switch, or a two-way switch. A button-type push switch or the like is used.

Next, the operation will be explained. In Figure 1, visor 1
When is in the R position, position switch Ps ₁ is on and Ps ₂ is off.

Now, when the retractable operation switch 12 is operated to the contact N side to raise the visor 1, the contacts C, N, relay Re ₁ , position switch Ps ₁ , and relay contact Ry ₂ are activated.
Current flows through the circuit, relay Re ₁ operates, and relay contact Ry ₁ switches to the positive side of the power supply. Therefore, a drive current flows from the power supply to the reversible motor 11 in the direction of the contact Ry ₁ , the motor 11 , and the contact Ry ₂ , and the motor 11 rotates in a direction that rotates the visor 1 toward the N position. At the same time relay Re ₁ is connected to diode D ₁
It is self-maintained by the current flowing through it, and the above state is maintained even if you release your hand from the retractable operation switch 12. Eventually, when visor 1 reaches the N position,
Since position switch Ps ₁ is turned off, the relay
The self-holding of Re ₁ is released, the contact Ry ₁ returns to the ground side, the motor 11 stops, and the visor 1 enters a usage state where it is stopped at the N position.

Furthermore, when the visor 1 is in the N position (or the F position), if the retractable operation switch 12 is operated to the contact R side, since the position switch Ps ₂ is on, the relay Re ₂ is activated, and the contact Ry ₂ is activated. is switched, a drive current having the opposite polarity to that described above flows through the motor 11, and the visor 1 rotates in the direction of the R position, stopping at the R position where the position switch Ds ₂ is turned off, and enters the retracted state.

Furthermore, even if the retractable operation switch 12 is operated to the R side when the visor 1 is in the R position, or to the N side when the visor 1 is in the N position, the motor 11 will not be driven, and the motor 11 will not be driven. When the switch 12 is operated to the N side, the motor 11 rotates toward the N position.
When the switch 12 is operated to the R side when it is between the R position and the F position, the motor 11 rotates toward the R position, and the visor 1 rotates to the N position or R position and then stops.

Due to space constraints, it is preferable for the switch operating section of a vehicle to be a small switch. For example, it would be advantageous if a two-button push switch, which tends to be large, could be replaced with a one-button push switch. FIG. 3 shows an example of a retractable operation switch suitable for such a case.

That is, as shown in FIG. 3, the foldable operation switch 12 in FIG. 1 is composed of a push-button switch 13, a T-flip-flop 14, and one-shot multi-function switches 15a and 15b. Therefore,
Each time the switch 13 is pressed, the output levels of Q and Q of the T-flip-flop 14 are reversed, and each time the outputs of the one-shot multis 15a and 15b are alternately at a high level for a short period of time, and the rotation direction of the reversible motor 11 is You can choose either one.

In the above embodiment, the foldable operation switch 12 is set to R.
After the visor 1 is operated to either the side or the N side, the self-holding action cannot be released until the visor 1 reaches the R position or the N position, which may be inconvenient. FIGS. 4 and 5 show an embodiment in which this point has been improved so that the rotation can be reversed during operation.

In FIG. 4, the retractable operation switch 12 is a triple momentary switch, and the interlocking switch 12a, which is turned off when operated to the R side, is a relay switch.
An interlocking switch 12b, which is inserted in series with Re ₁ and turns off when operated to the N side, is inserted in series with relay Re ₂ .

In this configuration as well, the basic operation is the same as in the case of FIG.
When the relay Re 1 is operated to the R side, the relay Re ₁ becomes de-energized, the contact Ry ₁ returns to the position shown in the figure, and the drive current of the motor 11 is cut off. At the same time, position switch Ps ₂
is on, relay Re ₂ is energized, contact Ry ₂ switches to the positive side of the power supply, and the relay
While Re ₂ is self-holding, a driving current in the opposite direction flows through the motor 11, the rotation direction is reversed, and the visor is rotated toward the R position. Further, when the switch 12 is operated to the N side while rotating from the N position to the R position, the visor begins to rotate towards the N position by the same reverse operation as described above.

In this example, since there is a delay in the activation time of the relay, it is also possible to use this delay to stop the motor 11 midway. In other words, for example, the operating time of a relay is 10 msec, and the return time is 20 msec.
sec and the total time is 30 msec, if the operating time of the switch 12 is 30 msec or more, the motor 11 will reverse, and if it is less than 30 msec, the relay will be activated.
Re ₁ or relay Re ₂ is not self-maintained, so the motor 11 remains stopped.

The triple momentary switch in the example shown in FIG. 4 is relatively large, which is undesirable in terms of space. FIG. 5 shows an embodiment in which this is implemented as a single-pole, double-throw momentary switch, and the same control function is achieved.

That is, in this example, transistors Tr ₁ and Tr ₂ are used instead of mechanical interlocking switches 12a and 12b.
By operating the switch 12, a positive power supply voltage is applied to the emitter of each transistor to make the transistors Tr ₁ and Tr ₂ conductive, and the relay is turned on.
Re ₁ and Re ₂ are activated.

In the above-mentioned FIG. 1, the part surrounded by the chain line is the part housed in the visor 1, and there are four lead lines from the visor 1, and position switches Ps ₁ and Ps _2.
Four connection lead wires are required for each connection,
Since there is not enough space for the position switch, it is better to have as few connection lead lines as possible.

FIG. 6 shows an example in which the position switch has three connection lead lines in order to meet this requirement.
That is, the position switches Ps ₁ and Ps ₂ are inserted into the ground sides of the relay contacts Ry ₁ and Ry ₂ , and are made common to the fixed contacts 2 and 3, for example, so that only three lead wires are required. In this case, the number of lead wires from the visor 1 will be five, but since the ground wire of the mirror drive circuit (not shown) that is provided separately can be used as the ground wire, the number of lead wires will essentially remain four. It will be a good thing.

<Effects of the Invention> As is clear from the description of each embodiment above, the present invention detects the position of the visor using a position switch, and by combining this with a self-holding circuit, the reversible motor can be operated. Since the drive current is switched and maintained, it is easy to operate the folding operation switch, and the visor can be stopped at an accurate position. This makes it possible to simplify the overall circuit configuration and to efficiently utilize the switch operation section of a vehicle with space constraints.

[Brief explanation of drawings]

The drawings show embodiments of the present invention.
The figure is a wiring diagram of one embodiment, Figure 2 is a schematic plan view showing the opening and closing positions of the position switch, Figure 3 is a wiring diagram of a modified example of the foldable operation switch, and Figure 4 is a wiring diagram of another embodiment. 5 is a wiring diagram of a modification thereof, and FIG. 6 is a wiring diagram of a modification of FIG. 1. 1... Visor, 11... Reversible motor, 12...
...Foldable operation switch, Ps ₁ ...First position switch, Ps ₂ ...Second position switch,
Re ₁ ...First relay (first self-holding circuit), Re ₂
... Second relay (second self-holding circuit), Ry ₁ and Ry ₂ ... Relay contacts.

Claims (1)

[Claims] 1. A reversible motor that rotates the visor in the direction of the use position and the storage position; and a reversible motor that operates in response to the rotation of the visor, turns off at the use position, and at least from the storage position to just before the use position. A first position switch that is turned on, a second position switch that is turned off in the storage position and turned on from the folding position to just before the storage position, and a self-return type switch that selects the rotation direction of the reversible motor. It has a retractable operation switch and a contact point for switching the current direction of the reversible motor, and is connected to the power supply via the reversible operation switch and is connected in series with the first position switch or the second position switch, respectively. a first self-holding circuit that is connected to the retractable operation switch and operates when the visor rotates from the storage position to the use position; A door mirror automatic storage control device comprising: a second self-holding circuit that operates when rotating.