JPH0417394Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial field of application> The present invention is an electrically retractable mirror in which the entire mirror can be rotated from its normal position in use to its folded storage position and vice versa. Regarding a control device.

<Conventional technology and problems> In order to stop the mirror in its normal position or in the retracted position, conventional electric retractable mirrors require electrical equipment such as a limit switch installed at the stop position or a slip spring switch that cuts off the current at the stop position. means are being used. However, such a configuration requires a complicated control circuit for establishing control logic in addition to switches such as a limit switch or a slip-spring switch, resulting in an overall high cost.

The present invention has been devised to address these problems and to provide an inexpensive control device using a simple control circuit.

<Means for Solving the Problems> In order to achieve the above object, the present invention inserts a retraction control switch between the retraction motor for rotating the mirror and the power source to change the direction of the current flowing to the retraction motor, As the retraction control switch, a momentary switch is used in which the movable contact moves from the standby position to the starting position only when moved by manual operation, automatically returns from the starting position to the standby position, and is held at the standby position, The fixed contact connected to the storage motor is configured by a movable contact to close with the starting fixed contact connected to the power supply side at the starting position and with the standby fixed contact at the standby position, and the above fixed standby contact and An electric storage device characterized by inserting a holding contact between the power supply and the power source, which closes in conjunction with the closing of the starting fixed contact, and which opens when the mirror reaches its normal position or storage position. The present invention provides a control device for a type mirror.

Preferably, a slip spring switch, which is composed of a sliding plate and a brush contact that move relative to each other as the mirror rotates, and is turned off when the mirror is in the retracted position or the normal position, is inserted in series with the retractable motor. .

The holding contact may be, for example, a self-holding contact that is self-held by a current flowing through a storage motor, or a contact that is held for a predetermined time by a timer circuit that starts a time-limited operation when the holding contact is closed. It is.

<Function> When the above-mentioned holding contact is a contact that is held for a predetermined time by a timer circuit, the movable contact is moved from the standby position to the starting position by manual operation, and the movable contact, the retractable motor, the fixed contact, and the starting contact are When the is closed, current flows through this contact and the storage motor begins to rotate in a predetermined direction, and the holding contact is closed. After the above manual operation is completed, the movable contact automatically returns to the standby position, and the movable contact returns to the standby position. Current flows through the holding and holding contacts, and the retraction motor continues to rotate. When the mirror reaches the storage position or normal position after a predetermined period of time, the holding contact opens and the storage motor is disconnected from the power source. Therefore, it is recommended to set the closing time of the holding contact to match the rotating speed of the mirror, or to use a mechanical stop mechanism such as a slip-ring switch that stops rotating the mirror at a predetermined position. Then, storage control can be performed using an extremely simple circuit. In particular, when the above-mentioned holding contact is a self-holding contact,
The mechanical stop mechanism opens the self-holding contacts.

<Example> The illustrated embodiment will be described below.

In Fig. 1, 1 is a storage control switch, 2 is a DC power supply, 3 is an ignition switch, 4 is a timer circuit, 5 is a holding contact controlled by the timer circuit 4, ML is a storage motor for the left mirror, MR is the retraction motor for the right mirror.

An example of the arrangement of the contacts of the storage control switch 1 is shown in FIG. CA, CB are movable contacts that slide in the left and right direction, BA, VA, MA, EA are fixed contacts provided corresponding to the movable contact CA, BB,
VB, MB, EB are fixed contacts provided corresponding to the movable contact CB, and the above MA, MB are fixed contacts connected to the storage motor MR, MR, VA, VB, and
EA and EB are fixed contacts for standby, and BA and BB are fixed contacts for startup. The movable contacts CA and CB are interlocked and can be left set at the retracted standby position or normal standby position shown by the solid line at the bottom of Figure 2, and can also be set at the retracted start position at the left end and the normal start position at the right end. It has a so-called momentary structure, which allows it to move only when it is operated by hand, and automatically returns to the stored standby position or normal standby position, respectively, when the operation is stopped. The shape and dimensions of each contact are as shown in the figure.In the storage standby position, the fixed contact
VA and MA are connected and MB and EB are connected respectively, and in the retracted starting position, fixed contacts BA and MA are connected and
MB and EB are connected respectively. In addition, in the normal standby position, between fixed contacts MA and EA and between VB and MB.
In the normal starting position, the fixed contacts MA and EA and the fixed contacts BB and MB are connected respectively.

That is, in this embodiment, the contacts between MA and VA, between MA and EA, between MB and VB, and between MB and EB are standby contacts corresponding to a normal polarity switch, and between the contacts MA and BA and MB , BB serves as the starting contact. As shown in FIG. 1, storage motors ML and MR are connected between contacts MA and MB, and contacts VA and VB are connected to the positive pole of power supply 2 via holding contact 5 and ignition switch 3. Contacts EA and EB are connected to the negative pole of the power supply 2, and contacts BA and BB are connected to the positive pole of the power supply 2 via the ignition switch 3. Also, one end of the timer circuit 4 is a diode.
It is connected to contacts MA and MB via DA and DB, and the other end is connected to the negative electrode of power supply 2.

In addition, fixed contacts BA of storage control switch 1,
The boundaries between VA and between BB and VB are arranged close to each other with inclined boundaries so that they can be smoothly switched while overlapping as the movable contacts CA and CB move.

FIG. 3 shows an example of the timer circuit 4.
Capacitor C and resistor R ₂ that constitute the time constant circuit,
Discharge resistor R ₃ , relay coil RL ₁ of holding contact 5,
It includes transistors Tr ₁ , Tr ₂ , etc. for driving relays. In addition, SL and SR are retractable motors ML,
This is a slip ring switch for automatic stop inserted in series with the MR, and as shown in Figure 4, the sliding plate 11 moves relatively as the mirror rotates.
, brush contacts 12, 13a, 13b, and diodes _D1 , _D2 . Sliding plate 1
1 is provided with notches 11a and 11b,
In the storage position indicated by the solid line, the sliding plate 11 and the brush contact 13
b opens, and at the normal position indicated by the broken line, the sliding plate 11 and the brush contact 13a open.

Next, the operation will be explained. FIG. 1 shows a state in which the storage control switch 1 is in the storage standby position, and the mirror is in its normal position. Here, the movable contact CA,
When the CB is operated to the retracted starting position (assuming that ignition switch 3 is closed), the contact
Current flows through BA, MA, motors ML and MR, slip-ring switches SL and SR, and contacts MB and EB, motors ML and MR start, and the mirror begins to rotate toward the retracted position. At the same time, the input voltage is also applied to the timer circuit 4, charging of the capacitor C is started, and the base potential of the transistor Tr ₁ becomes high through the resistor R ₁ , transistors Tr ₁ and Tr ₂ are turned on, and the relay coil RL ₁ is turned on. It is energized and the holding contact 5 is closed. Therefore, even if the movable contacts CA and CB return to the storage standby position after the operation is stopped, the motor
Since ML and MR are connected to power supply 2 through contacts 5, VA, and MA, they continue to operate, and the mirror continues to rotate toward the retracted position and the slip spring switch is turned on.
The sliding plates 11 of SL and SR move from the broken line position in FIG. 4 toward the solid line position.

In this way, when the mirror reaches the retracted position, the brush contact 13b reaches the notch 11b and the switch is activated.
SL and SR open. On the other hand, in the timer circuit 4, since charging of the capacitor C is completed and the base potential of the transistor Tr ₁ decreases, the transistors Tr ₁ and Tr ₂ are turned off, the relay coil RL ₁ is de-energized, and the holding contact 5 is opened. The time that this holding contact 5 is closed is set to be slightly longer than the time for the mirror to reach the storage position from the normal position, and normally, when the switches SL and SR open, the motor ML,
Although MR stops, contact 5 further opens, and the circuits of motors ML and MR are completely cut off. In addition, if the rotating mirror stops midway due to an abnormal lock, switches SL and SR will remain closed, but contact 5 will open after a certain period of time regardless of this abnormal operation, so the motor This prevents burnout due to overheating.

Next, when the mirror is retracted as described above, operate the retraction control switch 1 to set the movable contact CA,
When CB is moved to the normal starting position, motors ML and MR are started in the opposite direction by the same operation as above, and contact 5 is closed. Therefore, even if the movable contacts CA and CB return to their normal standby positions after operation is stopped,
The mirror continues to rotate in the direction of the normal position, and when the mirror reaches the normal position, the contact 13a reaches the notch 11a and switches SL and SR open, and the contact 5 opens and the rotation operation in the direction of the normal position ends. .

In the above embodiment, a normally open contact of a relay controlled by a timer circuit 4 is used as the holding contact 5, but this contact may also be a self-holding contact using, for example, a current flowing through a storage motor. Fifth
The figure shows an example of this.

That is, a current detection coil RL ₂ with a low resistance value is inserted in series with the storage motors ML and MR, and a reed switch _{S 2 is} provided that turns on when current flows through the current detection coil RL ₂ . A series circuit of relay coil RL ₁ is connected to the positive side of power supply 2. Other connections are the same as in FIG. With this configuration, the movable contacts CA, CB
After the motors ML and MR are operated to the retracted starting position or normal starting position and motors ML and MR are started, reed switch S ₂ is turned on, relay coil RL ₁ is energized, contact 5 is closed, and movable contacts CA and CB are activated. It remains closed even if it returns to the storage standby position or normal standby position. When the mirror reaches the retracted position or the normal position and both spring switches SL and SR are turned off, the self-holding operation ends, contact point 5 opens, and the mirror rotation operation ends.

In each of the above embodiments, slip spring switches SL and SR are used as automatic stop switches.
However, for example, a mechanical slip mechanism that causes the mirror to slip when it reaches the normal position or the retracted position (for example, Japanese Patent Application No. 60-242490 (Japanese Unexamined Patent Publication No. 62-249))
-101558)), or a slip detection mechanism that detects this slip and opens the motor circuit, eliminates the need for a slip spring switch, and also simplifies the overall control circuit. will be demonstrated even more.

<Effects of the invention> As is clear from the description of the embodiments above, the present invention provides a momentary starting contact in the retraction control switch that switches the direction of the current flowing through the retraction motor. In combination with a holding contact that is closed, the motor circuit is held after startup. Therefore, it is possible to perform the mirror retracting operation with a single touch using a simple control circuit, and a control device with good operability can be obtained at a low cost.

[Brief explanation of the drawing]

Fig. 1 is a circuit diagram of an embodiment of the present invention, Fig. 2 is a diagram showing an example of the arrangement of contacts of a storage control switch, and Fig. 3 is a diagram showing an example of the arrangement of contacts of a storage control switch.
FIG. 4 is a circuit diagram of a timer circuit, FIG. 4 is a diagram showing the configuration of a slip-ring switch, and FIG. 5 is a circuit diagram of another embodiment. 1... Storage control switch, 2... Power supply, 4...
Timer circuit, 5... Holding contact, 11... Sliding plate,
12, 13a, 13b...Brush contact, BA,
BB...Fixed contact (starting contact), VA, EA,
VB, EB……Fixed contact (standby contact), ML, MR
...Storage motor, SL, SR ...Slip spring switch, RL ₁ ...Relay coil, RL ₂ ...Current detection coil, S ₂ ...Reed switch.

Claims (1)

[Claims for Utility Model Registration] (1) Between the storage motor for rotating the mirror and the power supply,
A retraction control switch that changes the direction of the current flowing to the retraction motor is inserted, and as the retraction control switch, the movable contact moves from the standby position to the start position only when moved by means operation, and automatically returns from the start position to the standby position. Using the momentary switch, which is held at the standby position, the fixed contact connected to the storage motor is closed by the movable contact with the starting fixed contact connected to the power supply side at the start position, and the switch is held at the standby position. between the standby fixed contact and the power supply, and which closes in conjunction with the closing of the starting fixed contact, and when the mirror reaches its normal or retracted position. A control device for an electric retractable mirror, characterized by inserting a holding contact that opens. (2) A practical device in which a slip spring switch, which consists of a sliding plate and a brush contact that move relative to each other as the mirror rotates, and is turned off when the mirror is in the retracted position or the normal position, is inserted in series with the retractable motor. A control device for an electrically retractable mirror according to claim 1. (3) A control device for an electric retractable mirror according to claim 1 or 2, wherein the holding contact is a self-holding contact that is self-held by a current flowing through a storage motor. (4) The electric motor according to claim 1 or 2, wherein the holding contact is a contact held for a predetermined time by a timer circuit that starts a time-limited operation when the holding contact is closed. Control device for retractable mirrors.