JP2000016178A - Tilting device for rear-vision mirror of vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tilting device for a rear-vision mirror of vehicle, which makes variable speed control of a pair of drive motors for a left-right and a vertical driving rod, can suppress the size of the device body, and can enhance the sensing accuracy of the mirror face angle. SOLUTION: A tilting device for a rear-vision mirror of a vehicle is equipped with a left-right tilt driving rod 65 to tilt a mirror holder to the left and right with respect to the body housing, a vertical tilt driving rod to tilt the holder in the vertical direction, a pair of drive motors 61 for driving the rods, a tilt position sensing means 70 to sense the mirror tilting position from the moving amount of the rods, and a control part 80 which rotates the motors 61 at a low speed for setting the mirror in the specified position and changes the speed of the motors 61 to higher than the level at the time of low speed operation when a backward move signal for vehicle is given.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tilting device for a rearview mirror for a vehicle.

[0002]

2. Description of the Related Art Conventionally, a tilting device for a rearview mirror for a vehicle includes a driving rod for tilting the mirror holder in the left-right direction with respect to the main body housing and a driving rod for tilting the mirror in the vertical direction. A pair of drive motors for driving both drive rods, tilt position detecting means for detecting the tilt position of the mirror based on the amount of movement of both drive rods, and rotating both drive motors at a low speed to set the mirror at a predetermined position A device provided with a control unit is known.

The tilt position detecting means includes a reciprocating member which linearly reciprocates along a guide portion in accordance with the forward and backward movements of the both driving rods, and a reciprocating member for both tilting based on the reciprocating motion of the reciprocating member. A potentiometer as a detecting element for detecting the amount of movement of the driving rod, wherein the lower end of the reciprocating member is brought into contact with the lower ends of both tilting driving rods, and the upper end of the reciprocating member is slid by the slider of the potentiometer. Engage with the moving projection,
The lower end of the reciprocating member is biased by a spring so as to always contact the lower ends of both tilting drive rods, and the tilt angle of the mirror is detected by the displacement of the slider of the potentiometer.

In this vehicle, for example, the mirror tilting speed to an appropriate mirror position after the vehicle is traveling backward is the same as that at the time of fine adjustment to a predetermined position. Was not suitable for use in promptly confirming safety.

In view of the above, there has been proposed a high-speed tilting device for a rearview mirror for a vehicle in which the mirror is tilted at a high speed by a remote operation at an appropriate position of the mirror when the vehicle is traveling backward or forward traveling (Japanese Patent Application Laid-Open No. Hei 9-301071).

As shown in FIGS. 12 (a) and 12 (b), this tilting device for a rearview mirror for a vehicle has a driving rod 3 for tilting the mirror holder 2 in the left-right direction with respect to the main body housing 1 and a vertical tilting drive rod 3. A drive rod 4 for tilting up and down, a low speed drive motor 5 for the left and right drive rods 3, a low speed adjustment motor 6 for the up and down drive rod 4, and a high speed drive motor 7 are provided.

[0007]

However, this high-speed tilting device for a rearview mirror for a vehicle includes a high-speed drive motor 7 in addition to the low-speed adjustment drive motors 5 and 6 for the mirror 8, so that the high-speed drive motor 7 There is a problem that the size of the apparatus body becomes large in order to secure a storage space for the apparatus.

In the conventional tilt angle detecting means, when the tilt drive rod is tilted at a high speed by the drive motor, the sliding resistance between the reciprocating member and the guide member increases, so that the reciprocating member smoothly reciprocates. The movement is disturbed, and the movement of the reciprocating member is uneven, so that the movement amount of the tilting drive rod and the movement amount of the reciprocating member vary. For this reason, there is a possibility that the relationship between the detected mirror angle and the tilt drive rod varies, and the mirror angle cannot be detected with high accuracy.

Therefore, it is conceivable to use a spring having a large urging force. However, if a spring having a large urging force is used, the rotation direction of the drive motor when the tilting drive rod is advanced and the rotation of the drive motor when the tilting drive rod is retracted are considered. There is a problem that the speed of the tilting drive rod changes depending on the direction.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to reduce the size of the apparatus body by variably controlling the speed of a pair of drive motors for left and right and up / down drive rods. An object of the present invention is to provide a tilting device for a rearview mirror for a vehicle, which can improve detection accuracy of a mirror surface angle.

[0011]

In order to achieve the object, a first aspect of the present invention is to provide a left-right tilting drive rod for tilting a mirror holder in a left-right direction with respect to a main body housing, and an up-down tilting rod in a vertical direction. A drive rod for tilting, a pair of drive motors for driving the two drive rods, tilt position detecting means for detecting the tilt position of the mirror based on the amount of movement of the drive rod, and the tilt position detecting means for setting the mirror at a predetermined position. A control unit that variably controls both drive motors at low speed and receives a reverse signal of the vehicle, and variably controls the drive motor at a speed higher than the speed at which the drive motor is rotated at low speed. It is a tilting device.

Further, according to the invention of claim 2, the tilt position detecting means includes a swing lever swinging by the forward and backward movement of the drive rod, and a movement amount of the drive rod based on the swing of the swing lever. A detection element for detecting, the swinging lever having one end abutting on the lower end of the drive rod and the other end being urged by an urging member in a direction to press the drive rod, and relating to the detection element. A tilting device for a rearview mirror for a vehicle, wherein

According to a third aspect of the present invention, the control unit includes a motor driver for applying a drive voltage to the two drive motors, a regulator for supplying the drive voltage to the motor driver, and a switch circuit for switching the drive voltage. And a microcomputer that controls the switch circuit and the motor driver, and changes the rotation speed of the two drive motors by switching the drive voltage applied to the both drive motors. This is a mirror tilting device.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a tilting device for a vehicle rearview mirror according to the present invention will be described with reference to the drawings.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a tilting device main body of a rearview mirror for a vehicle, 10 is a main body housing, 40 is a mirror holder, and 50 is a joint member.

The main housing 10 includes a lower housing 20.
And an upper housing 30.
2, a pair of drive mechanism units 60 and a pair of tilt position detecting mechanism units 70 (tilt position detecting means) are provided therein. Further, a control device 80 (control unit) is provided inside the vehicle (not shown).

One of the pair of drive mechanisms 60 is used for tilting the mirror in the vertical direction, and the other of the pair of drive mechanisms 60 is used for tilting the mirror in the horizontal direction. One of the pair of tilt position detecting mechanisms 70 is used to detect the vertical tilt position of the mirror, and the pair of tilt position detecting mechanisms 7 is used.
The other of 0 is used for detecting the tilt position of the mirror in the left-right direction. The detailed configuration will be described later. Upper housing 3
0 has an annular bearing wall 31 at the center and through holes 32 and 33 at the periphery. This through hole 32,
Reference numerals 33 are located at 90 degrees in the circumferential direction of the annular bearing wall 31. The standing wall 34 is provided inside the annular bearing wall 31.
Are provided, and engagement claws 35 are provided on both side surfaces of the standing wall 34. In FIG. 1, one engagement claw 35 is visible, and the other engagement claw is not shown.

A mirror holding holder (not shown) holding a mirror is mounted on the mirror holder 40 on the front side. On the back side of the mirror holder 40, a hemispherical curved portion 41 is provided, and fitting portions 42, 43 are provided.
Is provided. The fitting portions 42 and 43 are located at positions corresponding to the through holes 32 and 33 of the upper housing 30.

As shown in FIG. 3A, the joint member 50 is provided with a pressing spring insertion groove 51 and a pair of rotation regulating shafts 52 and 53 on the upper side. The holding spring 59 shown in FIGS. 4A and 4B is provided in the holding spring insertion groove 51.
Is inserted. The holding spring 59 has a hemispherical recess 59 in the center.
a is provided, and a hemispherical concave portion 59 is provided in the joint member 50.
A pressing projection 54 that fits into a and presses the pressing spring 59 is provided.

The lower part of the joint member 50 is shown in FIG.
As shown in (b) and (c), a curved piece 55 is formed along the hemispherical curved portion 41 of the mirror holder 40, and a pair of opposed walls 56 and 57 facing the standing wall 34 of the upper housing 30 are formed. Is provided. As shown in FIG. 3B, the pair of opposed walls 56 and 57 are provided with an engagement hole 58 that engages with the engagement claw 35 of the upper housing 30.

On the front side of the mirror holder 40,
As shown in FIGS. 5A and 5B, the joint member 50
A fitting portion 44 fitted with the pair of rotation regulating shafts 52, 53,
45, and insertion grooves 46 and 47 into which both ends of the pressing spring 59 of the joint member 50 are inserted.
Is provided. The mirror holder 40 is rotatably attached to the housing 10 by a joint member 50 and a pressing spring 59 as shown in FIG.

As shown in FIG. 7, the pair of drive mechanisms 60 includes a pulse drive motor 61, a worm gear 62 attached to an output shaft 61a, a two-stage gear 63, an external gear 64, and a tilting gear 64. The driving rod 65 is roughly constituted.

The large-diameter teeth 63a of the two-stage gear 63 mesh with the worm gear 62, and the small-diameter teeth 63b of the two-stage gear 63 mesh with the teeth 64c of the external gear body 64. The external gear body 64 includes an external gear 64a and a core body 64b. The core body 64b is rotatable integrally around the axis of the external gear 64a. It is configured to be able to be tilted integrally with the advance and retreat of the 65.

The lower housing 20 has support portions 21 to 23
Is provided. A two-stage gear 63 is rotatably supported by the support 21, an external gear 64 is rotatably supported by the support 22, and a tilt position detecting mechanism 7 is supported by the support 23.
The swing lever 71 that constitutes a part of the pivot 0 is swingably supported. The detailed structure of the swing lever 71 will be described later. A screw is formed on the body 65a of the tilting drive rod 65, a spherical part 65b is formed on the top, and a small-diameter hemispherical convex part 65c is formed on the lower end. An engagement protrusion 65d is formed on the spherical portion 65b. The spherical portion 65b is fitted to the fitting portions 42 and 43 of the mirror holder 40 shown in FIG. Insertion grooves 42a, 43a into which the engagement protrusions 65d are inserted are formed in the fitting portions 42, 43. Engagement protrusion 65
d plays a role of preventing rotation of the tilting drive rod 65 in the direction around the axis, in cooperation with the peripheral walls of the insertion grooves 42a and 43a.

The core body 64b is formed with a screw that is screwed to the screw of the body 65a. The body 65a is inserted through the core 64b while the tilting drive rod 65 is screwed into the screw of the core 64b. The exposed portion of the tilt drive rod 65 is covered with a flexible boot member 66. The boot member 66 prevents water from entering the housing 10.

The upper housing 30 is provided with a boot mounting portion 36, and the boot mounting portion 36 serves as a bearing for rotatably holding the external gear 64 from above. A pressing plate 37 is provided between the external gear 64 and the boot member 66 in an elastically pressed state. The pressing plate 37 absorbs the rattling of the external gear body 64 and smoothly rotates.

The lower housing 20 has a potentiometer 7 as a detecting element for detecting the tilt position of the mirror.
2 are installed. This potentiometer 72 is roughly composed of a stator and a slider.
a. Reference numeral 73 denotes a holding plate of the potentiometer 72, and reference numeral 74 denotes a fixing screw of the holding plate 73.

As shown in FIGS. 8A and 8B, the swing lever 71 has a swing shaft 71a, one end 71b, and the other end 7b.
1c. The swing shaft portion 71a is connected to the lower housing 20.
Is supported by the support portion 23. A contact surface 71 that contacts the hemispherical convex portion 65c of the tilting drive rod 65 is provided on one end portion 71b.
d is formed. As shown in FIG. 8B, a pair of opposing plate portions 71e opposing each other are formed on the other end portion 71c. The facing space 71 of the pair of facing plates 71e
The operation protrusion 72a of the potentiometer 72 is inserted into f, and the pair of opposing plates 71e function as an engagement portion that is engaged with the operation protrusion 72a. An opening 71g is formed in the pair of opposed plates 71e. A spring positioning column 75 is erected on the support 23 of the lower housing 20. The spring positioning column 75 is provided with a swing lever 71.
Extends through the opening 71g to the upper housing 30, and the upper housing 30 has a spring positioning post 7
5 is provided with a fitting portion 37 that fits with the top portion. A spring 76 is provided on the spring positioning column 75. One end of the spring 76 is in contact with the fitting portion 37, and the other end is in contact with the other end 71 c of the swing lever 71. The swing lever 71 is biased by the biasing force of the spring 76 in a direction in which the tilt drive rod 65 is pressed.

As shown in FIG. 2, the control device 80 includes a regulator 81, a low-pass filter 82, a duty controller 83, a logic IC 84, a motor driver 85, and a microcomputer 86.

The regulator 81 receives DC12V from a vehicle battery and receives DC5V as a reference voltage.
Is supplied to the microcomputer 86. This reference voltage is the power supply voltage of the microcomputer 86 and the like. Note that the DC 12 V of the battery is supplied to the motor driver 85, which is the power supply voltage of the motor driver 85.

The low-pass filter 82 includes a microcomputer 8
9 to DC5 shown in FIG.
A low pulse voltage signal of V50% duty and a speed command voltage signal of a DC voltage having a voltage level of 5 V shown in FIG. 10A for high-speed tilting are input. The low-pass filter 82 receives the speed command voltage signal for the low-speed tilting of the mirror as an input signal of the duty controller 83 as shown in FIG.
, And outputs it to the duty controller 83. The low-pass filter 82 receives a speed command voltage signal for mirror high-speed tilting as an input signal of the duty controller 83 as shown in FIG.
Output DC5V shown in (b).

The duty controller 83 frequency-converts the speed command voltage signal for mirror low-speed tilting into a high-pulse voltage signal of DC5V 50% duty shown in FIG.
A DC voltage of 5 V (FIG. 10C), which is the same as that of FIG. 10B, is output using the speed command voltage signal for high-speed tilting as the speed command signal of the logic IC 84. Further, a control logic or the like as a rotation direction signal is input from the microcomputer 86 to the logic IC 84. The logic IC 84 outputs both speed command signals to the motor driver 85 based on the control logic.

The motor driver 85 supplies a rated voltage to the drive motor 61 at a 50% duty ratio based on a speed command signal for forward / reverse conversion for low-speed tilting of the mirror. As a result, the drive motor 61 rotates forward and backward at a low speed. Further, the motor driver 85 supplies the drive motor 61 with the same drive voltage as the rated voltage based on the speed command voltage signal of the mirror high-speed tilting forward / reverse conversion. As a result, the drive motor 61 rotates at high speed in the forward and reverse directions. The microcomputer 86 receives the movement position signal of the drive rod 65 from the potentiometer 72 and the operation switch signals of the mirror operation panel 90.
Further, a reverse signal (reverse signal) of the vehicle is input to the microcomputer 86. FIG. 11 shows the mirror operation panel 90.
As shown in FIG. 7, a changeover switch 91 is provided as a selection switch for the left and right mirrors, and a left manual tilt switch 92 and a right manual tilt switch 93 for tilting left and right and up and down in each of the left and right mirrors. An upward manual tilt switch 94 and a downward manual tilt switch 95 are provided. The mirror operation panel 90 is provided with, for example, a mirror proper position setting switch 96 for the first driver when the vehicle is traveling forward and a mirror proper position setting switch 97 for the second driver when the vehicle is traveling forward. I have. 9
Reference numeral 8 denotes a switch for storing a mirror proper position, and reference numeral 99 denotes a switch for setting a mirror proper position when the vehicle is traveling backward. The mirror operation panel 90 has a manual automatic changeover switch 1.
00 is provided.

The microcomputer 86 has respective manual tilt switches 92 to
95 and the mirror proper position memory switch 9 when the vehicle is traveling forward
A speed command voltage signal for low-speed tilting of the mirror is output to the low-pass filter 82 in response to the operation signals 6 and 97. Also,
The microcomputer 86 outputs a speed command voltage signal for mirror high-speed tilting to the low-pass filter 82 when the reverse signal is input.

The operation of the tilting device for a vehicle rearview mirror will be described below with reference to the drawings.

First, when the first driver adjusts the left side mirror to a mirror proper position during forward running of the vehicle, the manual automatic changeover switch 100 is set to off or auto, and the changeover switch 91 is tilted to the "L" side. Then, one of the mirror manual tilt switches 92 to 95 is pressed.

The microcomputer 86 confirms that the reverse signal has not been input by switching the change lever to the reverse side. Then, a speed command voltage signal for mirror low-speed tilt is output from the microcomputer 86 to the low-pass filter 82, and the control logic of the corresponding switch signal is output to the logic IC 84.

The logic IC 84 receives a signal of 50% duty from the duty controller 83 at a voltage level of 2.
A DC voltage of 5 V is input. And the logic IC 8
In step 4, a forward / reverse low-speed command signal for the motor driver is generated based on the control logic from the microcomputer 86. Then, a forward / reverse low speed command signal for the motor driver is output from the logic IC 84 to the motor driver 85.

The motor driver 85 generates a drive voltage for outputting the rated voltage at a 50% duty ratio based on the forward / reverse low speed command signal. This drive voltage is output to the drive motor 61, and the drive motor 61 is rotated forward and backward at low speed.

Then, the tilting drive rod 65 is moved forward and backward at a low speed, and the mirror holder 40 is moved in the direction of arrow AA (FIG. 7).
(See reference). At the same time, the swing lever 71 swings in the direction of arrow BB (see FIG. 7). By the swing of the swing lever 71, the operation protrusion 72a of the potentiometer 72 is slid, and the resistance value of the potentiometer 72 is changed.

When the left mirror is adjusted to the proper mirror position during forward running of the vehicle, the switch 98 for storing the proper mirror position is pressed. The resistance value of the potentiometer 72 is stored in a storage unit (not shown) of the microcomputer 86 as a mirror proper position of the first driver left mirror when the vehicle is traveling forward. In the case of the right side mirror, the changeover switch 91 is tilted to the “R” side, and the mirror proper position of the first driver right side mirror when the vehicle is traveling forward is adjusted in the same manner. ) Is stored as an appropriate mirror position of the first driver's right mirror when the vehicle is traveling forward. In addition, when the second driver adjusts the left and right mirrors to the appropriate mirror position when the vehicle is traveling forward,
The left and right mirrors are adjusted in the same manner, and are set by pressing the mirror proper position setting switch 97 when the vehicle is traveling forward.

For example, when the driver adjusts the mirror to an appropriate position when the vehicle is traveling backward, the left and right mirrors are selected in the same manner, and one of the mirror manual tilt switches 92 to 95 is pressed to display a position near the rear wheel. Adjust the left and right mirrors. Then, when the mirror proper position storage switch 98 is depressed and then the vehicle reverse traveling mirror proper position setting switch 99 is depressed, the resistance value of the potentiometer 72 is stored in the storage unit (not shown) of the microcomputer 86 so that the vehicle travels backward. The time is stored as the mirror proper position.

Next, when the left and right mirrors are tilted to the appropriate mirror positions when the vehicle is traveling backward to check the vicinity of the rear wheel, for example, a manual automatic changeover switch 100 is used.
Is set to “AUTO”.

Then, the microcomputer 86 checks the input of the reverse signal by switching the change lever to the reverse side. As a result, the speed command voltage signal for mirror high-speed tilting is supplied from the microcomputer 86 to the low-pass filter 82.
And the control logic for tilting the left and right mirrors to the appropriate mirror position when the vehicle travels backward is output to the logic IC 84.

The logic IC 84 is supplied with 5 V DC from the duty controller 83. The logic IC 84 generates a forward / reverse high-speed command signal for the motor driver based on the control logic from the microcomputer 86. Then, a forward / reverse high speed command signal for the motor driver is output from the logic IC 84 to the motor driver 85.

The motor driver 85 generates a rated driving voltage based on the forward / reverse high speed command signal. This drive voltage is output to the drive motor 61, and the drive motor 61 is rotated at high speed in the forward and reverse directions.

Then, the tilting drive rod 65 is moved forward and backward at high speed, and the mirror holder 40 is moved in the direction of arrow AA (FIG. 7).
(See reference). Then, when the left and right mirrors are in the proper mirror positions during reverse movement, the tilting drive rod 65 is moved.
Stopped. Then, the vicinity of the left and right rear wheel portions is confirmed by the driver. In addition, a manual automatic changeover switch 10
When 0 is tilted to the “MANUAL” side, the left and right mirrors are tilted to the mirror proper positions when the vehicle is traveling backward, regardless of the switching of the change lever.

When the vehicle moves forward after the vehicle retreats, the first driver presses the mirror proper position setting switch 96 when the vehicle is traveling forward, and the second driver presses the mirror proper position setting switch 97 when the vehicle is traveling forward. Then, the left and right mirrors are returned to the appropriate mirror positions when the vehicle is traveling forward for each driver.

[0049]

Embodiment 2 In Embodiment 2 of the present invention,
The drive speed of the mirror tilt drive motor is controlled by a drive voltage applied to the drive motor.

As shown in FIG. 13, the control device 80 is generally composed of a regulator 81a, a regulator 81b, a motor driver 85, a switch circuit 101a, a switch circuit 101b, and a microcomputer 86.

The regulator 81a and the regulator 81
12b is input to the switch b and the switch circuit 101b from the vehicle battery. Regulator 81a
Generates a rated voltage of 5 V DC from an input of 12 V DC, and this 5 V DC is supplied to the microcomputer 86 as a reference voltage. This reference voltage is
6 and so on.

The microcomputer 86 is based on a switch signal from the operation panel 90, a reverse signal (reverse signal) from the change lever, and a tilt position signal from the pair of potentiometers 72 of the pair of tilt position detecting mechanisms 70. A forward / reverse high-speed command voltage signal or a forward / reverse low-speed command signal is output to the motor driver 85 and the switch circuit 101a
And an ON / OFF control signal to the switch circuit 101b.

The regulator 81b generates a rated voltage of DC8V from the input of DC12V, and this DC8V is output to the switch circuit 101a.
When 1a is ON, it is supplied to the motor driver 85.

DC1 input to the switch circuit 101b
2V is supplied to the motor driver 85 when the switch circuit 101b is in the ON state.

The motor driver 85 responds to the forward / reverse low speed command voltage signal or the forward / reverse high speed command signal from the microcomputer 86 to switch the switch circuit 101a or the switch circuit 10a.
The drive voltage supplied via 1b is applied to the both tilting motors, and the both tilting motors are controlled to drive forward / reverse high speed or forward / reverse low speed.

The forward / reverse low-speed rotation drive of the tilt motor is as follows.

When an operation signal for the up / down tilting motor or the left / right tilting drive motor is input to the mirror operation panel 90, the operation signal is output to the microcomputer 86 as a switch signal. This switch signal is supplied to the microcomputer 86
Are input to the switch circuit 101,
A control signal is sent to a to turn on the switch circuit 101a. When the switch circuit 101a is turned on, 8V DC output from the regulator 81b is supplied to the motor driver 85.

Further, the microcomputer 86 sends a command signal corresponding to the operation signal to the motor driver 85, and when the motor driver 85 having received the command signal applies DC 8 V as a drive voltage to both the tilting motors 61, the tilting is performed. The motor rotates left and right or up and down at low speed in response to the operation signal. This low rotation speed is set in a speed range in which the angle of the mirror can be easily adjusted.

On the other hand, the forward / reverse high-speed rotation drive of the tilt motor is as follows.
The operation is started when a reverse signal is input to the microcomputer 86 from the change lever of the vehicle. When the reverse signal is input to the microcomputer 86, the microcomputer 86 sends a control signal to the switch circuit 101b to turn on the switch circuit 101b.
Set to N state. When the switch circuit 101b is turned on, DC 12V input from the vehicle battery is supplied to the motor driver 85.

Further, the microcomputer 86 sends a command signal to the motor driver 85 for tilting the mirror to the mirror tilt position corresponding to the stored data. This stored data is
This is a resistance value of the potentiometer 72 that indicates an appropriate mirror position when the vehicle is traveling backward, and is stored in a storage unit (not shown) of the microcomputer 86. Upon receiving this command signal, the motor driver 85 applies a drive voltage (DC1) to both tilt motors 61.
When 2V) is applied, both tilting motors rotate at high speed, and the mirror is quickly set to an appropriate position corresponding to the stored data.

[0061]

As described above, in the tilting device for a rearview mirror for a vehicle according to the present invention, a pair of drive motors for left / right and up / down drive rods are rotated at a low speed when a reverse signal of the vehicle is received. Since the control unit for performing the variable control at a higher speed than the speed at which the tilting is performed is provided, there is no need to separately provide a high-speed drive motor, and the tilting device main body can be downsized. Further, the detection accuracy of the mirror surface angle can be improved.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a main part of a tilting device for a vehicle rearview mirror according to the present invention.

FIG. 2 is a layout diagram of a pair of drive mechanism units and a pair of tilt position detection mechanism units of the tilting device, and a block diagram of a control device.

FIG. 3 is a view of a joint member, (a) is a plan view,
(B) is a sectional view, and (c) is a bottom view.

4A and 4B are diagrams of a holding spring, in which FIG. 4A is a plan view and FIG.
Is a sectional view.

FIG. 5 is a view of a mirror holder, (a) is a bottom view,
(B) is a sectional view.

FIG. 6 is a view showing how a mirror holder is attached to a housing by a joint member and a pressing spring.

FIG. 7 is a detailed sectional view of the tilting device.

8A and 8B are diagrams of a swing lever, wherein FIG. 8A is a plan view and FIG.
Is a side view.

FIG. 9 is a speed command voltage signal diagram for a mirror low-speed tilt,
(A) is a speed command voltage signal diagram from the microcomputer to the low-pass filter, (b) is a speed command voltage signal diagram from the duty controller to the logic IC, and (c) is a logic I signal.
It is a speed command voltage signal diagram from C to the motor driver.

10A and 10B are speed command voltage signal diagrams for mirror high-speed tilting, FIG. 10A is a speed command voltage signal diagram from the microcomputer to the low-pass filter, FIG. 10B is a speed command voltage signal diagram from the duty controller to the logic IC, (C) is a diagram of a speed command voltage signal from the logic IC to the motor driver.

FIG. 11 is an operation panel diagram.

12A and 12B are diagrams of a conventional tilting device for a rearview mirror for a vehicle, in which FIG. 12A is a layout view of a driving mechanism, and FIG. 12B is a detailed cross-sectional view.

FIG. 13 is a layout diagram of a pair of drive mechanism units and a pair of tilt position detection mechanism units of the tilt device, and a block diagram of a control device that changes the speed of the tilt motor with a drive voltage.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Body housing 40 ... Mirror holder 61 ... Drive motor 65 ... Drive rod for left / right and up / down tilting 70 ... Tilt position detecting mechanism part (tilt position detecting means) 80 ... Control device (control part)

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3D053 FF29 FF40 GG06 GG12 GG15 HH14 HH19 JJ36 JJ56 KK02 KK12 LL05 LL08 MM02 MM08 MM13 MM24 MM44

Claims (3)

[Claims] A drive rod for tilting the mirror holder in the left-right direction with respect to the main body housing; a drive rod for tilting the mirror holder in a vertical direction; a pair of drive motors for driving the two drive rods; Tilt position detecting means for detecting the tilt position of the drive rod based on the amount of movement of the drive rod; and rotating both the drive motors at a low speed to set the mirror at a predetermined position. A tilting device for a vehicle rearview mirror, comprising: a control unit that variably controls the motor at a speed higher than the speed at which the motor rotates at a low speed. 2. The tilt position detecting means includes: a swing lever that swings by moving the drive rod back and forth; and a detection element that detects a movement amount of the drive rod based on swing of the swing lever. The swing lever has one end abutted on the lower end of the drive rod, and the other end is urged by an urging member in a direction to press the drive rod, and is related to the detection element. The tilting device for a vehicle rearview mirror according to claim 1. 3. The control unit includes: a motor driver for applying a drive voltage to the two drive motors; a regulator for supplying the drive voltage to the motor driver; a switch circuit for switching the drive voltage; 2. The vehicle according to claim 1, further comprising a microcomputer that controls the motor driver, and changing a rotation speed of the two drive motors by switching the drive voltage applied to the both drive motors. Rearview mirror tilting device.