JPH0632447Y2 - Visor-powered device for folding car door mirrors - Google Patents

Description

TECHNICAL FIELD The present invention relates to a visor electric device in which a visor is rotated by a motor in a retractable door mirror for an automobile, and more particularly, to a motor drive circuit of the electric device.

Conventionally, door mirrors have recently become popular as a rear-view mirror for automobiles, but this door mirror has the advantage that the image is larger and easier to see than conventional fender mirrors, but the amount of protrusion to the outside of the vehicle body is large. There is a high possibility of contact with other things when driving in a large and narrow place or when putting in a garage, which is rather inconvenient. As a countermeasure against this, a retractable door mirror that can be folded down along the vehicle body has been proposed.

By the way, generally, there are two types of storage of the door mirrors, one of which is electrically operated and the other of which is manually operated. In the case of the electric type, although it depends on the circuit configuration for rotating the visor, the entire apparatus becomes expensive and the operability may deteriorate. Therefore, in order to reduce the cost of the entire apparatus and improve the operability, there is disclosed a motor parallel drive type drive circuit capable of operating two drive motors with one operation unit.

However, even in the case of this motor parallel drive system,
Problems may occur depending on the motor drive circuit configuration. For example, the left and right door mirrors are generally set and held at different angles in their use position (the visor standing position). Therefore, the visor movement time from the use position to the storage position is different, and the left visor reaches the storage position earlier than the right visor. Therefore, if the circuit configuration of the motor parallel drive system does not take the visor movement time difference into consideration, the drive of the visor drive motor of the left door mirror should originally be stopped by the position detection switch or the like in the storage position or the standing position. However, within the range of the above-mentioned time difference, the current may sneak and the voltage may be continuously applied to the drive motor. As a result, there is a possibility that the visor may overrun or rotate backward, or the drive unit may be damaged.

Therefore, the technical problem to be solved by the present invention is a visor electric device of a motor parallel drive type retractable door mirror, and the drive circuit configuration of the drive motor is relatively simple. Moreover, the operability is good, and the drive circuit for the visor drive mower of the retractable door mirror is provided so that the power supply to the drive motor can be reliably cut off at the predetermined position even if the left and right visors have a difference in movement time. It is to provide a visor electric device.

SUMMARY OF THE INVENTION (Structure) In order to achieve the above technical problems, the present invention has the following structure.

That is, in the present invention, the visor supporting the mirror is rotatably attached to the stay provided on the outer surface of the vehicle body,
The drive motor fixed to the visor rotates the visor with respect to the stay, and it is turned on when the visor is between the standing position and immediately before the storage completion position according to the rotation of the visor with respect to the stay. A rotation detection switch having a storage-side switch that becomes a storage position and a standing-side switch that is turned on when the visor is between the storage completion position and immediately before the standing position is provided between the stay and the visor.

An operation switch having one operation unit is provided in the automobile compartment. The operation switch has a storage visor switch and a standing visor switch that are self-held by a switching operation and are interlocked with each other to switch to a normally open side or a normally closed side.

Each of the drive motors has one contact of one of a storage-side switch and a standing-side switch provided in each corresponding rotation detection switch, a normally-closed-side contact of a storage visor switch provided in an operation switch, and a standing-up visor switch. Are connected to the normally open side contacts, respectively.

Further, the other contacts of the storage side switch and the standing side switch of each rotation detection switch are connected to the normally open side of the storage visor switch and the normally closed side contact of the standing visor switch of the operation switch, respectively. In order to control the current to flow in one direction of the other contact direction of each storage side switch and each normally closed side contact direction of the standing visor switch, a backflow prevention element, specifically, a diode, The contacts are connected in series at predetermined positions.

Further, a battery is connected between each common contact of the operating switch.

(Operation / Effect) According to the above configuration, a rotation detection switch having a storage-side switch and a standing-side switch that operate according to the rotation of the visor, a storage visor switch and a standing-up visor that operate in conjunction with each other. A combination of an operation switch having a switch and a drive motor selectively rotates the drive motor in a predetermined direction to raise and retract the visor. You can get it.

Further, by providing the backflow prevention element in the motor drive circuit, one of the visors has already reached the storage position or the standing position, while the other visor is in front of either of the above positions, that is, the intermediate position. However, it becomes possible to effectively prevent the current flowing through the other rotation detection switch from flowing into the one motor. Therefore, the drive motor for rotating the visor is surely controlled by the on / off operation of the corresponding rotation detection switch.

Further, by operating one operation portion of the operation switch to either the visor storing side or the visor standing side, both door mirrors can be simultaneously started to be stored or started to stand.

Embodiment Next, the present invention will be described in detail with reference to an illustrated embodiment of a door mirror. In this embodiment, as shown in FIG. 1, the visors of the left and right door mirrors are driven by one operation switch, and the drive circuits for driving the visors of the left and right door mirrors are substantially the same. Has been done. Therefore, one circuit configuration will be described in detail and replaced with the description of the configuration and operation of the present embodiment. or,
The structure of the electric retractable door mirror is well known, and a detailed description thereof will be omitted here except for the part according to the present invention.

First, the retractable door mirror will be outlined below with reference to FIG.

FIG. 3 shows a right door mirror, in which 1 is a stay attached to the right door (not shown), 2 is a visor,
Reference numeral 3 denotes a mirror, a rotary shaft 5 is formed upward on a support arm 4 extending substantially horizontally from the lower part of the stay 1, a shaft hole 6 of the visor 2 is fitted to the rotary shaft 5, and a moderation plate 7 and a moderation plate are provided. The visor 2 is rotatably attached to the stay 1 by fitting the spring 8 and attaching the spring retainer 9. The mirror 3 is held by the mirror holder 10, and the mirror holder 10 is attached to the visor 2 by the support plate 1
1 is supported by a ball bearing 12 so as to be tiltable.

15 is a fixed gear, 16 is a visor cover, 17 is a drive motor, 18 is an output gear attached to the output shaft 17a of the drive motor 17, 19 is a rotor, and the fixed gear 15 is coaxial with the upper end of the rotary shaft 5. The visor cover 16 is fixed to the stay-side end surface of the visor 2 so as to form a cylindrical convex surface having the rotation shaft 5 as its axis, and the drive motor 17 has its output shaft 17a parallel to the rotation shaft 5. Further, the output gear 18 is fixed to the visor cover 16 by an appropriate fixing means in such a position that the output gear 18 meshes with the fixed gear 15. or,
The rotor 19 is a cap-shaped member that is attached to the visor cover 16 by the attachment arm 19a, and is coaxially attached to the upper surface of the fixed gear 15 to form the rotation detection switch 20 together with the fixed gear 15.

The rotation detection switch 20 has the following structure. That is, fixed contacts 23 and 24, which are biased upward by the contact springs 22, are provided on the upper surface of the fixed gear 15, and correspondingly, a ring-shaped movable contact 26 is provided on the inner surface of the rotor 19. Arcuate movable contacts 27 and 28 are provided. As shown in FIG. 1, the fixed contact 23 contacts the movable contact 26 and the movable contact 27 to form a storage side switch 29, and the fixed contact 24 is the movable contact 26. And the movable contact 28 in contact with each other to form the standing side switch 30. The movable contacts 27 and 28 are provided over a range of about 90 degrees, but the position thereof is different from that of the stay 1 with respect to the visor 2
When the visor 2 is rotated, the storage side switch 29 is turned on when the visor 2 is between the standing position and immediately before the storage completion position, and when the visor 2 is between the storage completion position and immediately before the storage position. 30 is selected to be on. That is, as shown in FIG.
It is turned off. Here, the shaded portion shows the state in which the contact points are closed. Reference numeral 31 is a lead wire of the drive motor 17 and the rotation detection switch 20, which is led out through the inside of the rotary shaft 5 having a pipe shape and is connected to a power supply and an operation switch as shown in FIG.

FIG. 1 is a control circuit diagram in the case of electrically controlling a pair of door mirror devices installed on the left and right of the vehicle body. still,
The internal structure of the left side door mirror is different from that in Fig. 3 (mirror image). In the above circuit diagram,
Reference numeral 32 denotes operation switches provided in an operation panel installed near the driver's seat, each of which includes a single-pole double-throw storage visor switch 34 and a standing visor switch 33. The visor switches 33 and 34 are interlocked with each other, and normally one of the contacts 33a and 34a;
33b, 34b side, and when one contact (hereinafter referred to as a normally open contact for convenience) 33a or 34a side is switched to the other contact (hereinafter also referred to as a normally closed contact) 33b or 34b side by the switching operation. , It is a switching interlocking type that keeps itself in that state even if you release your hand. Each drive motor 17 is connected between the movable contact 26 of the corresponding rotation detection switch 20, the normally closed contact 34b of the storage visor switch 34 of the operation switch 32, and the normally open contact 33a of the standing visor switch 33. Has been done. The power supply battery 35 is connected between the common contact 34c of the storage visor switch 34 and the common contact 33c of the standing visor switch 33. Further, the movable contact 27 of the storage side switch 29 is connected to the normally open contact 34a of the storage visor switch 34 of the operation switch 32, and the diode D ₁ is connected between the both contacts 27, 34a. On the other hand, the standing side switch 3
The movable contact 28 of 0 is connected to the normally closed contact 33b of the standing visor switch 33 of the operation switch 32, and
A diode D ₂ is connected between the contacts 27, 33b. The diodes D ₁ and D ₂ are arranged so that a current flows toward the storage side switch 29 and the standing side switch 30.
In order to prevent the current from flowing in, they are arranged between the contacts.

Next, the operation will be described. The rotation detection switch 20 of FIG. 1 shows the visor 2 in a standing and used state,
Here, when the storage visor switch 34 is operated to switch to the normally open contact 34a side, the standing visor switch 33
Switches in tandem with the normally open contact 33a side, and the switch 34
Is held in that state even when you release your hand, and the battery 35-
The circuit of the normally open contact 34a of the storage visor switch 34, the storage switch 29, the drive motor 17, the normally open contact 33a of the standing visor switch 33, and the battery 35 is formed, and the drive motor 17 rotates the visor 2 in the storage direction. Rotate in the direction you can move it. When the visor 2 is rotated to the position immediately before the storage position, the storage-side switch 29 moves the movable contact 2
When the visor 2 is turned off by separating from the fixed contact 23, the visor 2 is rotated to the retracted position by the inertia force of the drive motor 17, and is positioned by the moderation portion provided between the visor 2 and the stay 1. The positions of the fixed contacts 23 and 24 in this stored state are shown by broken lines. In addition, the rotor 19 is actually rotated with the rotation of the visor 2.
Is rotated to rotate the movable contacts 26, 27, 28, but FIG. 1 shows a state in which the fixed contacts 23, 24 are moved relative to the movable contacts for the sake of convenience.

Next, when the standing-up visor switch 33 is switched to the normally closed contact 33b side to raise the visor 2, the storage visor switch 34 is also switched to the normally closed contact 34b side, and the battery 35 to the normally stored contact visor switch 34 are normally closed. Closed contact 34b ~ Drive motor 17 ~ Standing side switch 30 ~ Normally closed contact 33b of standing up visor switch 33 ~ Battery 3
The circuit of No. 5 is formed, and the drive motor 17 rotates in the direction in which the direction of the current is reversed and the visor 2 is erected. Immediately before the standing position, the standing side switch 30 is turned off, and the visor 2 is rotated by the coasting force of the drive motor 17 to the standing position, and is fixed in the standing state by the moderating action of the moderating plate 7 and the moderating spring 8. Of. In the figure, L indicates a left control circuit and R indicates a right control circuit.

FIG. 4 shows an example of the arrangement of the operation portion of the operation switch 32. As the operation unit 32a, a waveform operation knob, a push button, or the like is used according to the type of switch. By operating the operation unit 32a to the storage side (CLOSE) or the standing side (OPEN), the left and right door mirrors can simultaneously start the visor rotation.
Reference numeral 38 denotes an operation unit for adjusting the attitude of the mirror, 39 denotes a left / right selection operation unit for switching the mirrors for adjusting the attitude,
Mirror attitude control mechanism (not shown) provided in the visor 2
Used when operating.

By the way, in both door mirrors, generally, the set angle of the visor 2 is different in the standing position. That is, the moving range of the visor 2 is smaller on the left side than on the right side. Therefore,
When the visors 2 start moving at the same time, the left visor reaches the predetermined position first. In this case, the storage side and standing side switches 2 of the rotation detection switch 20 on the right side
Both 9 and 30 are on. For example, visor 2
When the left visor reaches the storage position and the right visor does not reach the storage position yet, that is, both the right switches 29 and 30 are both turned on, the battery 35 The current flows through the right side visor rising side switch 30 to the left side visor rising side switch 30, and flows into the negative side of the battery 35 through the left side motor 17. Even though the storage side switch 29 of the rotation detection switch is off, the rotation detection switch is rotated in the same direction. However, since the above circuit is provided with the diode D ₂ for preventing current backflow in the direction of the rising side switch 30, the flow of current in this direction is prevented. Similarly, the backflow of current from the storage side switch 29 is prevented by the diode D ₁ also in the standing position direction of the visor.

Therefore, even if the left and right visor setting angles are different, the rotation of each visor 2 is caused by the corresponding switch 29,
By using this circuit, the pair of door mirrors can be driven with good operability with a relatively simple circuit configuration.

[Brief description of drawings]

FIG. 1 is a circuit diagram for driving and controlling a visor for left and right door mirrors according to an embodiment of the present invention, and FIG. 2 is a switch operation development view of a rotation detection switch used in the door mirror control circuit of FIG. FIG. 3 is a partially cutaway front view of one of the door mirrors controlled by the control circuit of FIG. 1, and FIG. 4 is a front view showing an example of the arrangement of the operation portion of the operation switch of FIG. 1 ... Stay, 2 ... Visor, 3 ... Mirror, 5 ... Rotation axis,
15 ... Fixed gear, 17 ... Drive motor, 18 ... Output gear,
19 ... Rotor, 20 ... Rotation detection switch, 29 ... Storage side switch, 30 ... Standing side switch, 32 ... Operation switch, 32a ... Operation part, 33 ... Standing visor switch,
34 ... Storage visor switch, 33a, 34a ... Normally open contact, 33b, 34b ... Normally closed contact, 33c, 34c ... Common contact, 35 ... Battery, 37 ... Operation panel, D ₁ , D ₂
... Backflow prevention element (diode).

Claims (1)

[Scope of utility model registration request] 1. A visor electric device for a pair of retractable door mirrors mounted on left and right doors of an automobile, wherein each door mirror has a visor (2) supporting a mirror (3) provided on an outer surface of a vehicle body. The visor (2) is rotatably attached to the visor (1) and is rotated by the drive motor (17) fixed to the visor (2), and the visor (2) is rotated with respect to the stay (1). Depending on the movement, the storage side switch (29) that turns on when the visor (2) is between the standing position and immediately before the storage completion position, and the visor (2) between the storage completion position and immediately before the storage position. An operation having a rotation detection switch (20) having a standing side switch (30) which is turned on at a certain time between the stay (1) and the visor (2) and having one operation part (32a) in the vehicle interior. A switch (32) is provided, and when the operation switch (32) is self-held by the switching operation. By the way, the storage visor switch that interlocks with each other and switches to the normally closed side or the normally open side.
(34) and a standing visor switch (33), each drive motor (17) has a corresponding rotation detection switch.
Normally closed side of each contact (26) of the storage side switch (29) and the standing side switch (30) provided in (20) and the storage visor switch (34) provided in the operation switch (32). Contact (34b)
And the normally open side contact (33a) of the standing visor switch (33), respectively, and the other of the storage side switch (29) and the standing side switch (30) of each rotation detection switch (20). Each contact (27, 28) is a normally open side of the storage visor switch (34) of the operation switch (32) and a normally closed side of the standing visor switch (33) (34a, 33b)
And the current flows in each direction of the other contact (27) of the storage side switch (29) and the normally closed side contact (33b) of the standing visor switch (33). In order to control so that the backflow prevention element (D ₁ , D ₂ ) is connected in series at a predetermined position between the above contacts, the battery (35) is further connected to the common contacts (34c, 33c) of the operation switch (32). A visor electric device for a retractable door mirror for an automobile, which is connected between the two.