JP2001239886A - Driving circuit for vehicular outer mirror device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a driving circuit for a vehicular outer mirror device capable of miniaturizing a driving mechanism and of reducing its cost, and capable of reducing the play of a stay by forming the driving mechanisms on both an upper support part and a lower support part supporting the stay. SOLUTION: This driving circuit for the vehicular outer mirror device is composed of a lower support part 6 supporting the stay 5 having the mirror from the lower side, an upper support part 7 supporting the stay 5 from the upper side, and driving gear mechanisms 8, 9 having driving motors 10, 11 and gear mechanisms for rotating the mirror between a use position and a storage position. The driving gear mechanisms 8, 9 are respectively formed on the upper support part 7 and the lower support part 6. An operation member 14 for controlling the stop timing for current carrying to the driving motor 10 formed on the lower support part 6 and the stop timing for current carrying to the driving motor 11 formed on the upper support part 7 is formed so as to prevent the play of the stay 5 due to the backlash of the driving gear mechanisms 8, 9 when the stay 5 is kept in an intermediate part between the use position and the storage position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lower support portion for supporting a stay provided with a mirror from below, an upper support portion for supporting the stay from above, a driving motor and a gear mechanism, and using the mirror at a position where the mirror is used. The present invention relates to an improvement of an outer mirror device for a vehicle, comprising a drive gear mechanism configured to rotate between a storage position and a storage position, wherein the drive gear mechanism is provided on an upper support portion and a lower support portion, respectively.

[0002]

2. Description of the Related Art Conventionally, for example, as shown in FIG.
It is known that a lower support 6 for supporting a stay 5 provided with 3 and 4 from below and an upper support 7 for supporting the stay 5 from above are provided.

As shown in FIG. 2, a drive gear mechanism (referred to as an electronic unit) 8 is provided on the lower support portion 6, and a drive gear mechanism (referred to as an electronic unit) 9 is provided on the upper support portion 7. I have. The drive gear mechanisms 8, 9 have drive motors 10, 11, a gear mechanism and motor control circuits 12, 13, and are used for rotating the mirrors 2, 3, 4.

The driving circuit of the vehicle outer mirror device has an operation switch member 14, as shown in FIG. The operation switch member 14 includes movable contacts 15, 16,
It has fixed contacts 17 to 22, and stop contacts 23 and 24. The fixed contact 17 is connected to the power supply V +, and the fixed contact 18 is connected to the ground E-.

The fixed contacts 19 and 22 are connected to the motor control circuit 12
Are connected to one side of the drive motor 10 via a motor control circuit 13 and to one side of the drive motor 11 via a motor control circuit 13. The fixed contacts 20 and 21 are connected to the motor control circuit 12
Is connected to the other side of the drive motor 10 via the motor control circuit 13 and to the other side of the drive motor 11 via the motor control circuit 13.

When the movable contacts 15 and 16 are connected to the fixed contacts 19 and 21 by operating the operation switch member 14,
When the drive motors 10 and 11 are energized, the stay 5
Is pivoted from the storage position to the use position. When the operation contacts 14 and 16 are connected to the fixed contacts 20 and 22 by operating the operation switch member 14, the stay 5 is rotated about the axis O from the use position to the storage position. Movable contact 1
When the motors 5 and 16 are returned to the neutral position, the drive motors 10 and 1
The energization to 1 is stopped.

In this conventional outer mirror device for a vehicle, the stay is held without play at the use position and the storage position of the mirror.

[0008]

However, in the vehicle outer mirror device, there is a demand to stop the rotation of the stay at a position halfway between the use position and the storage position and hold the stay. In the device, when the rotation of the stay is stopped at an intermediate position between the use position and the storage position, the stay may rattle due to the backlash of the meshing of the gear mechanism, and the stay may rattle during traveling of the vehicle. Then, there is a problem that the mirror is blurred and the view becomes unstable.

The present invention has been made in view of the above circumstances, and an object of the present invention is to stop and rotate the stay at a position halfway between the use position and the storage position. Provided is a drive circuit for a vehicle outer mirror device that can prevent rattling of a stay due to backlash of the gear mechanism.

[0010]

In order to achieve the above object, an invention according to claim 1 includes a lower support for supporting a stay provided with a mirror from below, and an upper support for supporting the stay from above. A drive gear mechanism having a drive motor and a gear mechanism for rotating the mirror between a use position and a storage position, wherein the drive gear mechanism comprises the upper support portion and the lower support portion. In the vehicle outer mirror device provided in each of the above, when the stay is maintained at an intermediate position between the use position and the storage position, in order to prevent rattling of the stay due to backlash of the drive gear mechanism. Power supply for controlling the timing of stopping the power supply to the drive motor provided in the lower support and the timing of stopping the power supply to the drive motor provided in the upper support; Characterized in that the stop timing control means are provided.

According to a second aspect of the present invention, in the drive circuit of the vehicle outer mirror device according to the first aspect, the power supply stop timing control means includes a drive motor provided on the lower support and the upper support. The power supply to the other drive motor is stopped with a predetermined time delay after the power supply to one of the drive motors provided in the unit is stopped.

According to a third aspect of the present invention, in the drive circuit of the vehicle outer mirror device according to the first aspect, the power supply stop timing control means includes a drive motor provided on the lower support and the upper support. The power supply to one of the drive motors provided in the unit is stopped, and the other drive motor is reversely rotated from the time when the power supply to one of the drive motors is stopped, and the other drive motor is stopped after a predetermined time.

According to a fourth aspect of the present invention, in the drive circuit of the vehicle outer mirror device according to the first aspect, the power supply stop timing control means includes a drive motor provided on the lower support portion and the upper support portion. One of the drive motors provided in the unit is reversely rotated to stop both drive motors.

According to a fifth aspect of the present invention, in the drive circuit of the vehicle outer mirror device according to the first aspect, the power supply stop timing control means is constituted by a mechanical switch member.

According to a sixth aspect of the present invention, in the drive circuit for the outer mirror device for a vehicle according to the first aspect, the power-supply stop timing control means includes an electric switch circuit.

According to the present invention, when the operation of the drive motor is stopped by the operation switch member, the stay is rotated by the drive motor provided on the lower support and the drive motor provided on the upper support. Since the direction of movement is relatively opposite, the backlash of both gear mechanisms is eliminated, and when the stay is stopped and held at an intermediate position between the use position and the storage position, the gear mechanism is used. The backlash of the stay can prevent the backlash of the stay.

[0017]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 3 shows the internal structure of the vehicle outer mirror device according to the present invention.

The driving mechanism 8 is, as shown in FIGS.
The worm 26 and the worm 2 connected to the drive motor 10, the output shaft of the drive motor 10 via a joint member 25.
6, a worm 28 that rotates integrally with the helical gear 27, a drive gear 29 that meshes with the worm 28, and a shaft 30 that rotates with the rotation of the drive gear 29.

A washer 32, an O-ring 33, and a bush member 34 are inserted through a column 31 of the shaft 30. The shaft 30 is inserted into an insertion hole 35 a formed in the case 35 and assembled to the case 35. A spring receiver 36 is provided around the columnar portion 31, and a spring 37 is provided between the spring receiver 36 and the drive gear 29, and the drive gear 29 is urged downward by the spring 37.

A flange 38 of the shaft 30 is fixed to the lower end 5a of the stay 5. The flange 38
Has a ball guide groove 38a formed on the bottom surface thereof. A ball 39 is provided between the flange portion 38 and the case 35 so as to be located in the ball guide groove 38a. A stopper member 41 is fixed to the case 35 by a screw 40, and the rotation angle of the shaft 30 with respect to the case 35,
As a result, the rotation angle of the stay 18 is regulated (see Japanese Patent Application Laid-Open No. 8-34290).

The driving mechanism 9 is, as shown in FIGS.
Drive motor 11, motor control circuit board 43, motor 11
A worm 45 connected to the output shaft of the worm via a joint member 44, a helical gear 46 meshing with the worm 45,
The worm 47 includes a worm 47 that rotates integrally with the helical gear 46, a drive gear 48 that meshes with the worm 47, and a shaft 49 on which the drive gear 48 is fitted. The components of the drive mechanism 9 are held by cases 50 and 51, and a cover 52 is attached to the lower edge of the case 50 to cover the flange 53 of the shaft 49 from the side.

The shaft 49 has the shape shown in FIGS. 8 and 9, and has a ball guide groove 53 on the upper surface of its flange 53.
a, a columnar portion 54 having a small-diameter cylindrical portion 54a is formed. The columnar portion 54 is inserted into the cylindrical portion 50a of the case 50, and the drive gear 48 is provided on the columnar portion 54.
The groove 54b of the small-diameter cylindrical portion 54a is provided with a clutch holder 5
5 and the E-ring 56 are attached, and the drive gear 48
Are prevented from coming off from the columnar portion 54.

On the other hand, a washer 58 is provided around the cylindrical portion 50a with one end of a spring 57 in contact therewith. The other end of the spring 57 is in contact with the drive gear 48 to urge it upward. By the upward urging force acting via the drive gear 48, the shaft 49 is
0 and 51 are held so as not to play.

A ball guide groove 53 is provided on the bottom of the case 50.
A circular through hole 50b is formed so as to face a.
A ball 59 is held below the through hole 50b, and a gap is formed between the ball 59 and the flange 53 here.

When a strong turning force is applied to the shaft 49 by, for example, an external force acting on the stay 18, the ball 59 rides over the step at the end of the ball guide groove 53a in the turning direction, and turns beyond the movable area of the shaft 49. Is allowed.

A drive circuit of the vehicle outer mirror device will be described below. First Embodiment FIG. 10 shows a first embodiment of a drive circuit for a vehicle outer mirror device according to the present invention.

In FIG. 10, reference numeral 70 denotes an operation switch member which also functions as a power supply stop timing control means. The operation switch member 70 includes a fixed contact 71
To 76, stop contacts 77 to 79, and movable contacts 80 to 82. The fixed contacts 71, 74 and 75 are connected to the power supply voltage V
Connected to +. The fixed contacts 72, 73, 76 are connected to the ground E.

The movable contacts 80, 81, 82 are attached to an insulating slide member 83. The insulating slide member 83 is slidably guided by a guide member 84. The movable contact 80 is connected to one side of the drive motor 11 via the motor control circuit 13. The movable contact 82 is connected to one side of the drive motor 10 via the motor control circuit 12. The movable contact 82 is connected to the other side of the motors 10 and 11 via the motor control circuits 12 and 13.

For example, when the stay 5 is rotated from the storage position to the use position, as shown in FIG.
The insulating slide member 83 is slid in the direction of arrow A.
Then, the fixed contact 71 and the movable contact 80 are connected, and the fixed contact 73 and the movable contact 81 are connected. Further, the fixed contact 75 and the movable contact 82 are connected.

Therefore, the fixed contact 71,
The current I1 flows to the drive motor 11 via the movable contact 80 and the motor control circuit 13, and the current I1 flowing into the drive motor 11 is returned to the ground E- via the movable contact 81 and the fixed contact 73. Further, a current I2 flows from the power supply voltage V + to the drive motor 10 via the fixed contact 75, the movable contact 82, and the motor control circuit 12, and the drive motor 10
Flows into the ground E- via the movable contact 81 and the fixed contact 73 in the same manner. The current I1
And the current I2 are designed to be substantially the same.

As a result, the stay 5 is driven by the drive motors 10, 1
1, the stay 5 is turned around the axis O in the same direction, the stay 5 is turned from the storage position toward the use position, and is stopped at the use position. When the insulating slide member 83 is slid in the direction of arrow B, the stay 5 is rotated from the use position to the storage position.

Here, the fixed contacts 71 to 76 and the stop contacts 77 to 79 are arranged at equal intervals. The width W1 of the movable contact 80 in the direction along the sliding direction is formed smaller than the width W2 of the movable contact 82 in the direction along the sliding direction.

Now, assuming that the stay 5 is at the use position, the insulating slide member 83 is slid from the stop position in the direction of arrow B to rotate the stay 5 in the storage direction, and the stay 5 is moved between the storage position and the use position. It is assumed that the insulating slide member 83 is operated in the direction of arrow A in order to stop the rotation in the middle of the operation. FIG. 12A shows the operation time of the insulating slide member 83.

When the insulating slide member 83 is operated in the direction of arrow A, the contact between the fixed contact 72 and the movable contact 71 is cut off before the contact between the fixed contact 76 and the movable contact 82 is cut off. As a result, as shown in FIG. 12B, the power supply to the drive motor 11 is cut off.

Further, when the insulating slide member 83 is operated in the direction of arrow A, the contact between the fixed contact 76 and the movable contact 82 is cut off. As a result, as shown in FIG. 12C, energization of the drive motor 10 is stopped.

By stopping the power supply to the drive motor 11,
A rotation blocking resistance is added to the stay 5, and the drive motor 10 tries to rotate the stay 5 against the rotation blocking resistance of the stay 5, so that the backlash of the gear mechanism is eliminated, and the use position and When the stay is stopped and held at a position halfway from the retracted position, rattling of the stay due to backlash of the gear mechanism can be prevented.

In this drive circuit of the vehicle outer mirror device, a slide type mechanical switch member is used, but a seesaw type mechanical switch member may be used. [Second Embodiment] FIGS. 13 and 14 show a configuration in which an electric switch circuit is used instead of a mechanical switch member as the power supply stop timing control means. Figure 1
3. In FIG. 14, 90 denotes an energization stop timing control circuit. This power stop timing control circuit 90
Here, is used to control the timing of stopping the energization of the drive motor 11.

The power supply stop timing control circuit 90
Power supply section 91, timer circuits 92 and 93, switch element 9
4, 95, and a forward / reverse circuit 96. Switch element 9
4 and 95 are instantly turned on and off by timer circuits 92 and 93. The forward / reverse rotation circuit 96 includes fixed contacts 97 to 10
0, self-return type movable contacts 101 and 102, and relay coils 103 and 104. The movable contact 101 is connected to one side of the drive motor 11, and the movable contact 102 is connected to the drive motor 1
1 is connected to the other side. The power supply section 91 has a power supply voltage V +
And the ground E-.

The other connection method is as shown in FIG. 14. For example, assuming that the stay 5 is at the use position, the operation switch member 14 is operated to
When 16 is connected to the fixed contacts 20 and 22, a current I 3 flows through the drive motor 10 as shown in FIG.

The timer circuit 92 of the power supply stop timing control circuit 90 is turned on when the movable contact 15 is connected to the fixed contact 20. In addition, the arrow X1
A current flows in the directions indicated by X3. Thereby, the self-recoverable movable contact 102 is switched from the fixed contact 99 to the fixed contact 100.

As a result, as shown in FIG. 15, a current flows as shown by arrows X4 to X7, and the drive motor 11
Is driven, and the stay 5 is driven from the use position toward the storage position. By operating the operation switch member 14, FIG.
As shown in FIG.
When it is connected to the third side, the drive of the drive motor 10 is stopped. Further, since the energization of the relay coil 104 is cut off, the self-return type movable contact 102 is switched to the side connected to the fixed contact 99. Further, when the timer circuit 92 is turned off after a predetermined time, the switch element 94 is turned on, and as shown in FIG. 16, a current flows from the voltage source Vcc in the direction of arrows X8 to X10, and the self-return type movable contact 101 is switched from the fixed contact 97 side to the fixed contact 98 side. As a result, arrows X11 to X11 in FIG.
A current flows as indicated by X15, and the drive motor 11 is rotated in the reverse direction. Thereafter, the switch element 94 is turned off.

As a result, a rotation preventing resistance is added to the stay 5, and the drive motor 11 tries to rotate the stay 5 against the rotation preventing resistance of the stay 5, so that
When the backlash of the gear mechanism is eliminated and the stay is stopped and held at a position halfway between the use position and the storage position, the stay is prevented from rattling due to the backlash of the gear mechanism. Can be.

In other words, as shown in the time chart of FIG. 18A, when the movable contact 16 is connected to the fixed contact 22 by operating the operation switch member 14, FIG.
(B), as shown in FIG.
1 are driven together, the stay 5 is rotated in the direction from the use position to the storage position, and when the operation of the operation member 14 is stopped halfway between the use position and the storage position, as shown in FIG. Then, the power supply to the drive motor 10 is stopped. On the other hand, the drive motor 11 is instantaneously rotated in the opposite direction simultaneously with the stop of the operation of the operation switch member 14 as shown in FIG. 18C, and the rotation of the stay 5 is forcibly stopped as shown in FIG. 18D. You.

In the second embodiment, the stay 5 is stopped at an intermediate position from the use position to the storage position, but the movable contacts 15 and 16 are fixed to the fixed contacts 19 and 2.
1, the stay 5 can be stopped halfway from the storage position to the use position. Third Embodiment In the second embodiment, energization of the drive motor 10 is stopped at the same time as the operation of the operation switch member 14 is stopped, but the operation of the operation switch member 14 shown in FIG. After a predetermined time delay as shown in (b),
While stopping the power supply to the drive motor 10, FIG.
As shown in FIG. 19D, the drive motor 11 is rotated in reverse at the same time as the operation of the operation member 14 is stopped, and the drive motors 10 and 11 are stopped at the same time. The operation may be forcibly stopped.

According to the third embodiment, the backlash can be eliminated in a shorter time than in the first and second embodiments.

The backlash is eliminated by the electric control means of the second embodiment and the third embodiment.
By shifting the drive start time of No. 1, it is also possible to shorten the time during which the stay 5 is forcibly stopped.

[0048]

In the vehicle outer mirror device according to the present invention, the drive mechanism is provided on both the upper support portion and the lower support portion for supporting the stay, so that the drive mechanism can be reduced in size and cost. It is possible to achieve the effect that the play of the stay can be reduced as well as the play of the stay.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a conventional vehicle outer mirror device.

FIG. 2 is an explanatory diagram of a drive circuit of a conventional vehicle outer mirror device.

FIG. 3 is a sectional side view showing a driving mechanism in a lower support portion according to the present invention.

FIG. 4 is an enlarged perspective view showing a part of the driving force transmission mechanism shown in FIG. 3;

FIG. 5 is a plan view showing a drive mechanism in an upper support portion according to the present invention.

FIG. 6 is a diagram illustrating the driving mechanism A- in the upper support portion shown in FIG. 5;
It is sectional drawing which follows the A line.

FIG. 7 is a diagram illustrating a driving mechanism B- in the upper support portion shown in FIG. 5;
It is sectional drawing which follows the B line.

FIG. 8 is a plan view showing a shaft in an upper support portion.

FIG. 9 is a side view showing the shaft in the upper support.

FIG. 10 is a diagram showing a drive circuit of a first embodiment of the vehicle outer mirror device according to the present invention.

FIG. 11 is an explanatory diagram of a drive circuit of the vehicle outer mirror device according to the present invention, showing a connection state when a movable contact is connected to a fixed contact and a stay is driven from a storage position to a use position. ing.

FIG. 12 is a timing chart for explaining the operation of the drive circuit shown in FIG.

FIG. 13 is a block circuit diagram for explaining a second embodiment of the drive circuit according to the present invention.

14 is a block diagram showing a detailed configuration of the drive circuit shown in FIG. 13, and is an explanatory diagram for explaining a current flowing through a relay coil when the stay is rotated from a use position to a storage position.

FIG. 15 is a block diagram of the drive circuit shown in FIG. 13 and is an explanatory diagram of a current flowing through the drive motor when the stay is rotated from the use position to the storage position.

FIG. 16 is a block diagram of the drive circuit shown in FIG. 13, showing a state of a current flowing through the switch element when the operation member is set to the stop position while the stay is being rotated from the use position to the storage position. FIG.

FIG. 17 is a block diagram of the drive circuit shown in FIG. 13, wherein the reverse rotation current flowing to the drive motor is set immediately after the operation member is set to the stop position during the rotation of the stay from the use position to the storage position. FIG.

18 is a timing chart of the drive circuit shown in FIG.

FIG. 19 is a timing chart for explaining a third embodiment of the drive circuit according to the present invention.

[Explanation of symbols]

 5 Stay 6 Lower support part 7 Upper support part 8, 9 Drive gear mechanism 10, 11 Drive motor 14 Operating member (power stop timing control means)

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Suguru Hashimoto 80 Itado, Isehara, Kanagawa Prefecture Inside Isehara Works, Ltd. (72) Inventor Tatsuo Kyoda 80 Itado, Isehara, Kanagawa Prefecture F term in the Isehara Works (reference) 2H043 CD04 CE02 3D053 FF13 FF22 GG01 GG15 KK02 KK12 LL08 LL09 MM02 MM03 MM07 MM23

Claims (6)

[Claims] 1. A lower support portion for supporting a stay provided with a mirror from below, an upper support portion for supporting the stay from above, a drive motor and a gear mechanism, and the mirror is used in a use position and a storage position. A drive gear mechanism for rotating between the upper support portion and the lower support portion, wherein the drive gear mechanism is provided on the upper support portion and the lower support portion, respectively. In order to prevent the stay from rattling due to backlash of the drive gear mechanism when the stay is maintained at a position halfway from the position, the power supply stop timing to the drive motor provided on the lower support portion and the upper An electric vehicle stop timing control means for controlling the timing of stopping the power supply to the drive motor provided on the support portion is provided. The drive circuit of Tamira apparatus. 2. The drive circuit for an outer mirror device for a vehicle according to claim 1, wherein the power supply stop timing control means includes a drive motor provided on the lower support and a drive motor provided on the upper support. The power supply to the other drive motor is stopped after a predetermined time from the stop of power supply to one of the drive motors. 3. The drive circuit for an outer mirror device for a vehicle according to claim 1, wherein the power-supply stop timing control means includes a drive motor provided on the lower support and a drive motor provided on the upper support. The power supply to one of the drive motors is stopped, and the other drive motor is reversely rotated from the time when the power supply to one of the drive motors is stopped, and the other drive motor is stopped after a predetermined time. 4. The drive circuit for an outer mirror device for a vehicle according to claim 1, wherein the power-supply stop timing control means includes a drive motor provided on the lower support and a drive motor provided on the upper support. Is characterized in that both of the drive motors are stopped by reversing one of the two. 5. The drive circuit for an outer mirror device for a vehicle according to claim 1, wherein the power-supply stop timing control means comprises a mechanical switch member. 6. A driving circuit for an outer mirror device for a vehicle according to claim 1, wherein said power-supply stop timing control means comprises an electric switch circuit.