JPH05445Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a control circuit for a vehicle mirror which can be set to a set position and a retracted position by means of an electric motor.

[Prior Art] A mirror attached to a vehicle door has a larger protruding dimension than a fender mirror, which makes it difficult to put the mirror in a garage or ship, so a mechanism for folding down the mirror housing is incorporated. conventionally,
The configuration was such that the driver manually folded down the mirror housing, which was extremely troublesome.

Therefore, the applicant has incorporated a motor into the mirror housing, and by operating it from the driver's seat, the mirror housing can be rotated to a predetermined set position, as well as to a stored position when entering a garage. We have developed something that makes it possible to do this and have applied for it.
-Refer to Publication No. 143043).

Figure 2 is a specific circuit configuration diagram of the same, in which B is a battery, A is a 3-contact, 2-circuit motor rotation switch, and C is a prime mover section consisting of a motor M and diodes C1 to C3. , D is an automatic stop circuit consisting of a substantially semicircular conductive pattern DD' and four brushes D1 to D4 in contact with the conductive pattern DD'.
The brush D2 is configured to come off the conductive pattern DD' at the retracted position. It should be noted that the brush D4 is configured to be deviated from the conductor pattern DD' from the storage position to the angular range close to the set position.

Fig. 2 shows the state of the mirror set position. In this state, when the changeover switch A1 is switched to the contact on the dotted line side, the battery power is switched to the switch A1, the motor M, the brush D3, and the conductor pattern.
DD', brush D2, diode C2, switch A
1. Current flows in the battery B system, and motor M
rotates to drive and rotate the mirror toward the storage position. When the brush D2 is in the retracted position, the brush D2 is removed from the conductive pattern DD', the motor drive circuit is cut off, and the motor is stopped. To return to the set position from this state, switch A1 is switched to the solid line state. Then, switch A1, diode C
1. Brush D1, conductor pattern DD', brush D
3. Motor M is connected to battery B via switch A1, and motor M rotates in reverse. When the set position is reached, the brush D1 is removed from the conductive pattern DD', the motor drive circuit is cut off, and the motor is stopped.

[Problem to be solved by the invention] According to the drive circuit shown in FIG. At least three diodes must be provided in the portion C, which increases the number of elements and wiring connections, resulting in a problem that wiring and assembly take time.

SUMMARY OF THE INVENTION An object of the present invention is to improve the problems of the prior art as described above and to provide a control circuit that can rotate a mirror between a set position and a retracted position without using any diodes.

[Means for Solving the Problems] In order to achieve the above-mentioned object, the present invention has a mirror housing rotatably attached to a mirror base, and the mirror housing is rotated between a set position and a storage position. This is a control circuit for an electric retractable mirror that has a built-in motor and gear mechanism for rotating the mirror, and includes a 3-contact, 3-circuit interlocking switch that controls forward and reverse rotation of the motor, and a switch that cuts off the motor's energizing circuit at the mirror set position. The mirror is approximately 1/4 circular in shape and has a notch formed in the first notch and a second notch that cuts off the energizing circuit of the motor at a mirror storage position shifted approximately 90 degrees from the first notch. consists of a conductor pattern that coincides with the center of rotation of the mirror housing, and three brushes arranged in a straight line along the radial direction of the conductor pattern. A brush is disposed at a position corresponding to the first notch and the second notch, and the second brush is disposed between the first and third brush, and the first brush and the interlocking A common contact of a first switch among the changeover switches is connected, a third brush is connected to a third common contact of the interlock changeover switch, and a second brush and a common contact of a first one of the interlock changeover switches are connected. The common contact of the second switch is connected via a motor, and each contact of the interlocking changeover switch is connected to the positive side of the power supply when switching the set position, and the power supply when switching the storage position. The second switch is connected to the negative side of the power supply when switching the set position and is connected to the positive side of the power supply when switching the storage position, and the third switch is disconnected from the power supply when switching the set position and The device is characterized in that it is connected to the power source so that it is connected to the negative side of the power source when switching the storage position.

[Function] Since the control circuit for the electric retractable mirror of the present invention has the above-described configuration, when the interlocking changeover switch is switched to the set position when the mirror is in the retracted position, one terminal of the motor is connected to the first terminal. The positive side of the power supply is connected through the switch, the first brush, the conductor pattern, and the second brush, and the other terminal is connected to the negative side of the power supply through the second switch, thus setting the mirror at the set position. When the mirror reaches the set position, the first brush comes into contact with the first notch to stop energizing the motor, and the mirror is automatically stopped at that position.

In addition, when the mirror is in the set position, switching the interlocking switch to the storage position causes the other terminal of the motor to be connected to the positive side of the power supply via the second switch, and one terminal to be connected to the negative side of the power supply via the second brush, the conductor pattern, the third brush and the third switch, thus rotating the mirror in the opposite direction to the above, and when the mirror reaches the storage position, the third brush comes into contact with the second notch, cutting off the supply of electricity to the motor and automatically stopping the mirror in that position.

As described above, in the present invention, the mirror can be rotated between the set position and the retracted position by changing the changeover switch, even though no diode is used.

[Embodiment] An embodiment of the present invention will be described below with reference to FIG. FIG. 1 shows a control circuit according to the present invention,
The same reference numerals as in FIG. 2 indicate the same parts. The motor rotation direction switching switch used in the present invention is a three-contact, three-circuit interlocking switching switch A. That is, contacts 1a, 1b, 1c
a first switch consisting of contacts 2a, 2b, 2
a second switch consisting of contacts 3a, 3b,
The contacts 1a, 2a, and 3a are the contacts that are closed when the switch is switched to the set side, and the contacts 1b, 2b, and 3b are the contacts that are closed when the switch is switched to the storage side. Contact 1
Connect a and 2b to the positive side of power supply B, and connect contact 2
Connect a and 3b to the negative side of power supply B. Contacts 1b and 3a are disconnected from the power supply.

Further, the prime mover section C includes a lead wire 11 connecting the common contact 1c of the first switch and the first brush D1, and a lead wire 11 connecting the common contact 2c of the second switch and the second brush D2 via the motor M. and the common contact 3 of the third switch.
Lead wire 13 connecting c and third brush D3
It is made up of three lead wires.

Further, the conductor pattern DD has a first notch d1 that allows the first brush D1 to come off the conductor pattern DD at the mirror set position and interrupt the energizing circuit of the motor M; 90° deviation,
At the mirror retracted position, the third brush D3 comes off the conductor pattern DD and forms a substantially 1/4 circular shape with a second notch d2 that cuts off the motor's energizing circuit, and the center of the third brush D3 comes off the circuit of the mirror housing. It coincides with the center of motion. In addition, in this embodiment, the conductive pattern is made into a 1/2 circular shape so that the mirror can be returned to the set position when it is forcibly rotated in the opposite direction to the mirror storage position. be.

The state shown in FIG. 1 shows a state in which the mirror (not shown) is in the set position, and when retracting the mirror from this state, the interlocking changeover switch A is switched to the contact b side as shown. Then, motor M
are the contact 2b of the second switch, the lead wire 12,
The second brush D2, the conductor pattern DD, the third brush D3, and the third brush D3 are rotated by being energized through the lead wire 13, and the mirror is rotated in the storage direction by the rotation, and the third brush D3 is rotated in the retracting direction. When the notch d2 is reached, the motor circuit is cut off and the mirror stops at the retracted position.

Moreover, when returning the mirror to the set position from this state, switch A is switched to the a contact side. Then, the motor M connects the first switch contact 1a, the lead wire 11, the brush D1, the conductor pattern DD,
The second brush D2, the lead wire 12, and the contact point 2a of the second switch are energized in the opposite direction to rotate, and the rotation rotates the mirror toward the set position, and the first brush D1 rotates. First notch d
When it reaches 1, the motor circuit is cut off and the mirror stops at the set position.

As described above, according to the present invention, the manual changeover switch A is connected to the battery as a 3-contact 3-circuit as shown in the figure, and the cutout of the conductor pattern is made as shown in the figure, so that the motor M can be
It is no longer necessary to use a diode in the prime mover part that constitutes the reverse rotation circuit, and the cost can be reduced accordingly and the structure can be made more compact. In addition, since no diode is required, the number of wiring connections is reduced, reducing the amount of work required.
The problem of incorrect wiring is also eliminated.

[Effects of the invention] As described above, according to the invention, costs can be reduced by eliminating the need for diodes, the structure can be simplified, and the problem of incorrect wiring can be eliminated. .

[Brief explanation of the drawing]

FIG. 1 is a control circuit diagram of a vehicle mirror showing an embodiment of the present invention, and FIG. 2 is a control circuit diagram of a vehicle mirror previously developed by the applicant. A...3-contact, 3-circuit interlocking changeover switch, B...
...Battery, C...Motor part, DD...Conductor pattern, D1-D3...Brush, d1, d2
...Notch.

Claims (1)

[Claims for Utility Model Registration] An electric retractable mirror in which a mirror housing rotatably attached to a mirror base has a built-in motor and gear mechanism for rotating the mirror housing between a set position and a retracted position. The control circuit includes a three-contact three-circuit interlocking changeover switch that controls forward and reverse rotation of the motor, a first notch that cuts off the energization circuit of the motor at the mirror set position, and the first
It has an approximately 1/4 circular shape with a notch formed therein and a second notch that cuts off the energizing circuit of the motor at the mirror storage position that is offset by approximately 90 degrees, and whose center is the center of rotation of the mirror housing. It consists of a matching conductor pattern and three brushes arranged in a straight line along the radial direction of the conductor pattern, and the first brush and the third brush are connected to the first notch. and the second brush is disposed at a position corresponding to the second notch, and the second brush is disposed between the first and third brushes, and the first brush and the first switch of the interlocking changeover switch are disposed between the first and third brushes. Connect the common contact of
connecting the third brush and a third common contact of the interlocking changeover switch; connecting the second brush and a common contact of the second of the interlocking changeover switches via a motor; The first switch connects each contact point of the interlocking changeover switch to the positive side of the power source when changing the set position, and is cut off from the power source when changing the storage position, and the second switch connects the contacts to the positive side of the power source when changing the set position. The third switch is connected to the negative side and connected to the positive side of the power supply when switching the storage position, and the third switch is disconnected from the power supply when switching the set position, and connected to the negative side of the power supply when switching the storage position. A control circuit for an electric retractable mirror, characterized in that it is connected to.