JPH04362449A - Cleaning device for mirror - Google Patents

Abstract

PURPOSE:To provide the cleaning device for a mirror which enables radio waves generated by a drive system, a lead wire and an ultrasonic wave vibrator to be grounded, and also thereby enables noise mixed into a radio to be lowered to a great extent. CONSTITUTION:Radio waves generated by a drive section 8, a lead wire and a vibrator 23 are grounded to a car body with the vibration transmitting plate 19 grounded, on which a vibrator is fitted, via an earth wire 48 of a shield wire 47, so that shielding effect is thereby obtained while noise mixed into a radio is lowered to a great extent.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cleaning device for automobile mirrors, which maintains the visibility of mirror surfaces such as fender mirrors and door mirrors.

0002

[Prior Art] Mirror equipped with conventional cleaning device
There are devices shown in FIGS. 13 and 14. This is done by attaching a vibration transmission plate 71 to the back of the mirror 70.
An ultrasonic vibrator 72 is attached to this vibration transmission plate 71, and this ultrasonic vibrator 72 is connected to the drive unit 7 through a lead wire 73.
4, and this drive section 74 sends a signal generated by an oscillator to an amplifier to appropriately vibrate the ultrasonic transducer 72. If raindrops or the like adhere to the mirror surface, for example, the ultrasonic vibrator 72 is vibrated by operating the operation switch in the vehicle interior, and the mirror 70 is vibrated via the vibration transmission plate 72. Water droplets etc. adhering to the surface are removed (Japanese Unexamined Patent Publication No. 2-185845).

0003

[Problems to be Solved by the Invention] However, since a vibration frequency of around 30 KHz to 70 KHz is used to vibrate the ultrasonic vibrator 72 to remove water droplets etc. attached to the mirror surface, There is a problem in that radio waves are generated from the amplifier of the drive section 74, the lead wire 73, and the ultrasonic vibrator 72, and the generated radio waves mix into the radio.

The present invention solves the above problems, and makes it possible to ground the radio waves generated from the drive unit, lead wires, and ultrasonic vibrator, thereby reducing noise mixed into the radio. It is an object of the present invention to provide a cleaning device for a mirror device that can significantly reduce the amount of cleaning required.

[0005]

[Means for Solving the Problems] In order to achieve the above object, the present invention includes a metal outer casing of a drive unit and a conductive vibration transmitting member that vibrates in response to a signal from the drive unit. A cable is attached to the signal line that connects the vibrator that vibrates the mirror.
Using a shielded wire, one end of the ground wire of this shielded wire was electrically connected to the outer casing of the drive unit, and the other end of the ground wire was electrically connected to the vibration transmission member. It is characterized by

[0006]

[Function] With this configuration, the outer casing of the drive unit is grounded to the vehicle body, so the radio waves generated from the drive unit are grounded, creating a shielding effect. The generated radio waves are grounded because the ground wire of the shield wire is connected to the outer casing of the drive unit and the outer casing is grounded, which has a shielding effect, and is also removed from the vibrator. Since the vibration transmission plate is grounded, the generated radio waves are transmitted to the ground, which has a shielding effect.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be explained below based on the drawings. 1 is a plan view of a mirror device equipped with a cleaning device according to the present invention, FIG. 2 is a front view thereof, and FIG. 3 is a sectional view taken along line 2A-A in FIG. The mirror device is equipped with a unit bracket 1 attached to a mirror base 1 so as to be tiltable about a tilting fulcrum Q, and this member includes a tilting drive mechanism attachment part 3, a mirror drive mechanism attachment part 4, and a drive part. The tilting drive mechanism mounting part 3 has a tilting drive mechanism 6, the mirror drive mechanism mounting part 4 has a mirror drive mechanism 7, and the drive part mounting part 5 has a drive part 8. Each is installed. A rotation center receiving part 10 is formed on the front surface of the outer casing 9 of the mirror drive mechanism 7.
A rotation center portion 12 on the back surface of the body 11 is rotatably fitted, and the mirror body 11 is located within the front opening of the housing 2 attached to the unit bracket. Further, a pivot receiving portion 13 is provided on the back side of the mirror body 11.
is provided, and a pivot 15a of an actuator 15 of the mirror drive mechanism 7 is fitted into this pivot receiving portion 13.
This movement of the actuator 15 causes the mirror body 11 to tilt about the center of rotation 12.

A mirror 16 is provided on the front surface of the mirror body 11, and the mirror 16 is connected via a tube 18 made of synthetic rubber or the like by a mirror ring 17 provided around the periphery of the mirror body 11. is maintained. A vibration transmission plate 19 made of a metal plate is arranged between the mirror body 11 and the mirror 16, and this vibration transmission plate 19 is provided with a vibrator mounting part 20 in the center. The vibration transmitting plate 19 is attached to the mirror 16 by bonding the adhesive portion 21 to the back surface of the mirror 16 with an adhesive. And the vibration transmission plate 19
As shown in FIG. 5, a slit-shaped hole 32 is formed therein.

Vibrator mounting portion 20 at the center of the vibration transmission plate 19
A vibrator 23 is bonded to the holder 23 with an adhesive 24. That is, as shown in FIG. 4, the vibrator 23 includes a vibrating element 27 having vibrator electrodes 25 and 26 on both sides, one vibrator electrode 25 having a copper film 28 and the other vibrator electrode 26
A copper film 29 is attached to each of the FPs, and these copper films 28 and 29 are covered with an insulating film 30.
It constitutes a C substrate 31.

Furthermore, a heater 34 is attached to the back surface of the mirror 16. This heater 34 is equipped with a heater plate 35 as shown in FIG.
An FPC board 36 is attached to the plate 35. That is, the FPC board 36 includes connecting piece parts 40, 41, and 42 and a mounting piece part 43, and a negative electrode pattern is formed from one connecting piece part 40 to the mounting piece part 43 and the middle connecting piece part 41. 44 is formed, and a positive electrode pattern 45 is formed from the other connecting piece part 42 to the intermediate connecting piece part 41. The end of the negative electrode pattern 44 of one connecting piece 40 is connected to the heating wire (
The end of the positive electrode pattern 45 of the other connecting piece 42 is connected to the positive end of the heating wire (not shown) of the heater plate 35. It is connected to the section.

[0011] The intermediate connecting piece 41 is upright, passes through the hole 32 of the vibration transmission plate 19, and protrudes from the back side thereof. Further, the attachment piece 43 of the FPC board 39 is attached to the vibration transmission plate 19 using a conductive adhesive using its negative electrode pattern 44.

The drive unit 8 includes a vibration control circuit connected to a power control circuit in a metal outer casing 50, and a shielded wire 47 as a signal line for the vibrator is connected to the drive unit 8.
is coming out, and the shield wire 47 has two lead wires 47a,
47b is covered with a ground wire 48 and further covered with a covering 49, and the ground wire 4 of the shield wire 47 is
8 is connected to the outer casing 50 (see FIG. 12). The heater wire 46 extending from the power control circuit consists of two harnesses 46a and 46b.
The two harnesses 46a and 46b of 6 are connected to the F of the heater.
Connection terminals 45a, which are the ends of the positive and negative electrode patterns 45 and 44 of the intermediate connection piece 41 of the PC board 36;
44a. The two lead wires 47a and 47b of the shield wire 47 are connected to connection terminals 28a and 29a provided on the copper films 28 and 29 connected to the vibrator electrodes 25 and 26 on both sides of the vibrator 23, respectively. It's connected. and,
The ground wire 48 of the shield wire 47 is connected to the heat conductor as shown in FIG.
A harness 46b on the negative side of the terminal electric wire 46 is connected to a connecting terminal 44a of the connected negative electrode pattern 44.

[0013] Therefore, the vibration transmission plate 19
It is connected to the negative electrode of the power source through the negative electrode pattern 44 of the FPC board 36 of 34. The vibration transmission plate 19 also includes a ground wire 48 of the shield wire 47, an outer casing 50 of the drive unit 8, a metal screw for attaching the outer casing 50, a unit bracket, and a mirror base 1.
The vehicle body will be grounded through this sequence. Further, if the unit bracket 1 and the mirror base 1 are made of metal, the ground of the outer casing 50 may be grounded to the vehicle body side via the ground wire of the drive section 8.

Next, the operation will be explained. The ultrasonic signal output from the drive unit 8 is transmitted to the leads 47a and 4 of the shield wire 47.
7b and causes the vibrator 23 to vibrate. This vibrator 23
The vibrations are transmitted to the mirror 16 via the vibration transmission plate 19 to remove raindrops and the like from the mirror surface. At the same time,
Electric current is also supplied to the heater 34 to heat the heating wire.
Moisture on the mirror surface is evaporated by heat radiation from the tar plate 35. At this time, the drive unit 8, the lead wires 47a, 4
7b, radio waves are generated from the vibrator 23 and become a source of radio noise. However, since the outer casing 50 of the drive unit 8 is ultimately grounded to the vehicle body, the radio waves generated from the drive unit 8 are grounded, which has a shielding effect. The radio waves generated from 47a and 47b are
The ground wire 48 of the lead wire 47 is connected to the vehicle body through the outer casing 50 of the drive unit 8, the unit bracket and the mirror base 1, or is connected to the ground by other methods mentioned above. Furthermore, since the vibration transmission plate 19 is connected to the ground of the vehicle body, the radio waves generated from the vibrator 23 are transmitted to the ground, thereby providing a shielding effect.

[0015] As a result, the noise mixed into the radio is significantly reduced.

In the above embodiment, the connection between the heater 34 and the vibration transmission plate 19 is made by connecting the mounting piece 43 of the FPC board 36 of the heater 34 to its negative electrode pattern 44.
It was attached to the vibration transmission plate 19 using a conductive adhesive, but as shown in FIGS. A cushioning material 51 may be interposed in between, and the cushioning material 51 may press down the attachment piece 43 of the FPC board 36 to bring the negative electrode pattern 44 of the attachment piece 43 into contact with the vibration transmission plate 19.

In the above embodiment, the ground wire 48 of the shield wire 47, which is the vibrator wire, is connected to the negative wire 47 connected to the negative harness 47b of the heater wire 46. Although the connection is made to the connection terminal 44a of the electrode pattern 44, the connection is not limited to this, and FIGS. 10 and 1
1, a male terminal 33 is formed by cutting and raising the vibration transmitting plate 19, and a female terminal 52 is connected to the end of the ground wire 48 of the shield wire 47, and this female terminal 52 is connected to the male terminal. terminal 3
3 may be inserted and combined. In this case, the vibration transmission plate 19 is electrically connected to the negative electrode pattern 44 of the heater 34 and grounded to the brand via the connection terminal 44a of the pattern 44. Outer casing 5 that is not grounded
If it is 0, this is valid.

Therefore, since the outer casing 50 of the drive unit 8 is ultimately grounded to the vehicle body, the radio waves generated from the drive unit 8 are grounded, and have a shielding effect. The radio waves generated from the - ground wires 47a and 47b are dropped to the ground because the ground wire 48 of the shield wire 47 is grounded to the vehicle body via the negative electrode pattern 44, and the shielding effect is reduced. Furthermore, since the vibration transmission plate 19 is grounded, the radio waves generated from the vibrator 23 are transmitted to the ground, thereby providing a shielding effect.

As a result, noise mixed into the radio is significantly reduced.

What is shown in FIG. 12 is an embodiment of a mirror device in which no heater is installed.
A female terminal 55 is connected to the end of the ground wire 48 of the shield wire 47, and the female terminal 55 is inserted into the male terminal 54 to couple it. The vehicle body is grounded through the ground wire 48 of the shield wire 47, the outer casing 50 of the drive section 8, the unit bracket to which the outer casing 50 is attached, and the mirror base 1 in this order.

Therefore, since the outer casing 50 of the drive unit 8 is grounded to the vehicle body, the radio waves generated from the drive unit 8 are grounded, and there is a shielding effect. The radio waves generated from 47a and 47b are
Since the ground wire 48 of the lead wire 47 is grounded to the vehicle body through the outer casing 50 of the drive unit 8, etc., it is dropped to the ground, which has a shielding effect. The radio waves are transmitted to the vehicle body through the vibration transmission plate 19, the ground wire 48 of the shield wire 47, the outer casing 50 of the drive unit 8, the unit bracket 1, and the mirror base 1 in this order. It is dropped to the ground and has a shielding effect.

[0022] As a result, noise mixed into the radio is significantly reduced.

[0023]

Effects of the Invention As explained above, the present invention has a metal outer casing of a drive unit, and a vibration system that vibrates a mirror via a conductive vibration transmission member that vibrates in response to a signal from the drive unit. Use a shielded wire for the signal line connecting the
Since one end of the ground wire of the lead wire is electrically connected to the outer casing of the drive unit, and the other end of the ground wire is electrically connected to the vibration transmission member, the radio waves generated from the drive unit are Since the outer casing of this drive unit is grounded to the car body, it is grounded, which has a shielding effect, and the radio waves generated from the vibrator are transmitted through the vibration transmission plate, which is grounded to the car body. As a result, it is grounded and has a shielding effect. As a result, noise mixed into the radio can be significantly reduced.

[Brief explanation of drawings]

FIG. 1 is a plan view of a mirror device equipped with a cleaning device according to the present invention.

FIG. 2 is a front view of the same.

FIG. 3 is a sectional view taken along line A-A in FIG. 2;

FIG. 4 is a cross-sectional view of the vibrator.

FIG. 5 is an exploded perspective view of a practical example of a mirror device equipped with a cleaning device according to the present invention.

FIG. 6 is a plan view with the same part omitted.

FIG. 7 is an exploded perspective view of another practical example of a mirror device equipped with a cleaning device according to the present invention.

FIG. 8 is an explanatory view of a state in which the mounting piece of the FPC board is pressed with a cushioning material and the negative electrode pattern of the mounting piece is brought into contact with the vibration transmission plate.

FIG. 9 is a partially omitted plan view of another practical example of a mirror device equipped with a cleaning device according to the present invention.

FIG. 10 is an explanatory diagram of a connection structure of a shield wire and a ground wire in the same mirror device.

FIG. 11 is a sectional view of the same.

FIG. 12 is an exploded perspective view of another practical example of a mirror device equipped with a cleaning device according to the present invention.

FIG. 13 is a perspective view of a mirror device equipped with a conventional cleaning device.

FIG. 14 is a sectional view of the same.

[Explanation of symbols]

8 Drive section 16 Mirror 19 Vibration transmission plate (vibration transmission member) 23 Vibrator 34 Heater 47 Shield wire 48 Ground wire 50 Outer casing

Claims (2)

[Claims] 1. A signal line connecting the metal outer casing of the drive unit and a vibrator that vibrates in response to a signal from the drive unit and vibrates the mirror via a conductive vibration transmission member.
Using a shielded wire, one end of the ground wire of this shielded wire was electrically connected to the outer casing of the drive unit, and the other end of the ground wire was electrically connected to the vibration transmission member. A cleaning device for a mirror device, characterized in that: 2. A heater that warms the mirror by energizing is provided, the negative electrode of this heater is connected to the vibration transmission member, and the negative electrode of the heater is connected to the ground of a shield wire. 2. A cleaning device for a mirror device according to claim 1, wherein the other end of the wire is connected.