JP2010052514A - Vehicular mirror - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicular mirror capable of obtaining a good rear view by restraining vibrations. <P>SOLUTION: This mirror comprises an acceleration sensor 6 installed to a mirror body 4 and capable of sensing vibrations of the mirror body 4, converting them into vibration signals and outputting them, a vibrator 7 installed to the mirror body 4 and vibrating the mirror body based on input command signals, and a conversion control part 8 capable of inputting the vibrations sensed by the acceleration sensor 6, converting them to generate the vibration command signals and transmitting them to the vibrator 7. Then, the vibrator 7 vibrates into a vibration waveform of a phase opposite to the vibration waveform detected by the acceleration sensor 6 generated by the conversion control part 8 and forcedly vibrates a mirror 41, so as to offset the detected vibrations. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a vehicle mirror having a structure that suppresses vibrations generated in a rear confirmation mirror attached to an automobile body or the like.

  A mirror is attached to the vehicle for backward confirmation. For example, a door mirror used in an automobile includes a mirror stay on an outer plate steel material constituting the outside of the B pillar, a mirror visor extending outward from the mirror stay, and a mirror mirror surface attached to the mirror visor. In this door mirror, the vibration of the automobile body during traveling is transmitted through the outer plate to vibrate the door mirror. The door mirror also vibrates due to the wind pressure received during traveling. This vibration is caused by the vibration of the outer plate being transmitted to the mirror body, causing the mirror surface to vibrate and blur the rear view.

Conventionally, in order to suppress this vibration, a method of isolating the mirror visor to which the mirror is attached has been used. For example, it has been done by constructing a strong mirror visor by reinforcing the mirror visor, but there is a problem that the structure of the mirror visor becomes complicated and the overall weight increases. In order to prevent shake due to wind pressure, for example, a shock absorber such as a spring is provided on the back surface of the mirror body so as to be connected to the mirror visor side. However, it is difficult to adjust the angle of the door mirror because of the structure. There was a point.
Therefore, conventionally, as a simple method, a butyl tape or a damping spring for damping is used. That is, as shown in FIG. 5, the door mirror 100 is normally fixed to a mirror stay 101 that fixes the door mirror 100 to the vehicle body so that the door mirror 100 can freely rotate between an open state at the time of rearward confirmation and a closed state at the time of storage. The mirror visor 102 has a shape in which one side is opened like a bowl, and the mirror body 103 is locked in the opening. The mirror body 103 can be changed in its mounting direction automatically or manually so that it can be adjusted to the driver at the time of rearward confirmation.

  Therefore, in order to suppress the vibration of the mirror main body 103, as shown in FIG. 6, which is an explanatory diagram of the central longitudinal section of FIG. . Of course, instead of butyl tape, a coil spring or the like may be attached between the mirror visor 102 and the back surface of the mirror body 103 so as to be supported. In the mirror main body 103, a mirror 105 having a mirror surface is locked to a mirror holder 106, but a butyl tape 104 is stuck between the mirror holder 106 and the mirror 105 to exert a buffering effect. Hereinafter, an example in which this cushioning material is applied is referred to as Conventional Example 1.

As a large-scale example, there is, for example, “Automobile Door Mirror”, Japanese Patent Laid-Open No. 07-304391. As shown in FIG. 7, an “automobile door mirror” (Japanese Patent Laid-Open No. 07-304391, hereinafter simply referred to as Conventional Example 2) includes a mirror body 201 and a visor 204 that holds the mirror body 201 so that the angle of the mirror body 201 can be adjusted. And a gyroscope 205 is provided on the inner surface of the visor 204.
The gyroscope 205 is arranged such that the rotating shaft 206a extends substantially along the left-right direction of the vehicle body with the visor 204 attached to the vehicle body. The gyroscope 205 is disposed at a position near the outer end of the visor 204.

Conventional Example 2 includes a mirror main body 201 that holds a mirror by a mirror holder 202, and a visor 204 that holds the mirror main body 201 through an angle adjustment mechanism 203 so that the angle can be adjusted, and a gyroscope is provided on the inner surface of the visor 204. When the gyroscope 205 is operated, the vibration of the visor 204 due to the vibration of the vehicle body and the vibration of the visor 204 due to the wind pressure are suppressed by the vibration suppression effect of the gyroscope 205. Thereby, the vibration of the visor 204 is transmitted to the mirror main body 201 and the mirror surface is vibrated to prevent the rear view from deteriorating. In addition, since the gyroscope 205 can be used to control vibration, there is no need to separately reinforce the visor 204 to prevent vibration, the structure of the visor 204 remains simple, and the complexity and overall weight are more than necessary. It will never grow.
The vibration of the visor 204 is a movement in which the outer end of the visor 204 swings up and down or back and forth around the visor 204 mounting position. With the visor 204 attached to the vehicle body, the rotating shaft 206a is substantially in the left-right direction of the vehicle body. By arranging the gyroscope 205 so as to extend in the direction of the vibration, the vibrations are all intended to tilt the axis of the gyroscope 205, so that the braking effect is best obtained.
Japanese Patent Laid-Open No. 07-304391

However, although the conventional example 1 can obtain the vibration-proofing effect of the door mirror with a simple structure, the vibration can be suppressed with the butyl tape 104 or the like used as a vibration-proofing material depending on the increase in traveling speed or the road surface condition. There was no problem.
Furthermore, the butyl tape 104 itself deteriorates due to secular change and has a problem that the effect as a buffer material is lost.

Further, in the conventional example 2, the gyroscope 205 is used and a relatively expensive part is attached, but there is a limit to the gyro damping effect as described above, and the increase in traveling speed and the road surface condition are also caused. In some cases, the vibrations are not fully controlled, and vibrations are caused, and the rearward visual recognition performance is impaired.
In the conventional example 2, although the gyroscope has a vibration suppression action, the gyroscope vibration suppression action has no causal relationship with the vibration that is actually generated, and the effect is not exhibited by the generated vibration. Variations occur.

  In view of the above problems, the present invention provides a vehicle door mirror having a structure capable of maintaining rear visibility even when the traveling speed is increased or the road surface condition is further deteriorated.

  The present invention relates to a vehicle mirror including a mirror body and a mirror visor that holds the mirror body in order to improve the anti-vibration performance of the door mirror. An acceleration sensor that can be converted into an output, an exciter that is provided in the mirror body and vibrates the mirror body based on an input instruction signal, and is electrically connected to the acceleration sensor and the exciter to detect the acceleration sensor And a conversion control unit that converts the vibration to generate a vibration instruction signal and transmits the vibration instruction signal to the shaker. The vibration instruction signal generated by the conversion control unit is input from an acceleration sensor. This is a signal that generates a vibration having the opposite phase to the vibration represented by the vibration signal. The exciter that receives the vibration instruction signal generates the vibration represented by the vibration instruction signal and vibrates the mirror body. Providing a vehicle mirror, characterized in that to.

In a vehicle mirror configured as described above, for example, an automobile door mirror, an acceleration sensor detects vibration of the door mirror body, converts the vibration into an electric signal, and outputs the electric signal.
The conversion control unit inputs the electrical signal output from the acceleration sensor.

  The conversion control unit calculates the input vibration signal and generates a vibration signal having an opposite phase. This vibration signal is a vibration support signal that can be input by the vibration exciter to generate the vibration represented by the vibration signal. The vibration instruction signal output from the conversion control unit is input by the shaker.

  The vibration exciter is fixed to the door mirror main body, generates vibration represented by the input vibration instruction signal, and vibrates the door mirror main body.

  At this time, the vibration generated by the shaker has an opposite phase to the vibration detected by the acceleration sensor, and therefore the door mirror body is vibrated in a direction to cancel the vibration detected by the acceleration sensor.

Therefore, according to the present invention, when the mirror visor vibrates due to vibrations transmitted through the outer plate of the automobile or due to wind pressure, and the door mirror main body vibrates due to this vibration, the acceleration sensor detects the vibration, and this detection Because the conversion control unit generates a signal that generates a vibration having an opposite phase to the generated vibration and outputs it to the shaker, the vibration of the shaker is generated in the opposite phase, causing the door mirror body to vibrate. It is vibrated so as to cancel the vibration transmitted through the outer plate and the vibration generated by the wind pressure, and the rear visibility can be kept good.
In the present invention, the vibration is suppressed by positively oscillating so as to be in the opposite phase to the vibration of the door mirror body generated by the wind pressure or the vibration of the vehicle body, so that the vehicle traveling speed is increased or the road surface condition is deteriorated. Even if the vibration increases due to the vibration, it is possible to generate a vibration to cancel if it is in the range where the vibration can be generated. It has the effect of being.
There is no worry of causing secular change like butyl tape, and there is an effect that it can be used stably over a long period of time.

  Further, in the conventional example 2, the vibration suppression action by the gyroscope has no causal relationship with the vibration actually generated. In the present invention, the vibration to detect and cancel the vibration is positively generated. Therefore, there is an effect that the vibration control action can be surely exhibited.

  Embodiments of the present invention will be described below with reference to the drawings. 1 is a front explanatory view showing an embodiment of the present invention, FIG. 2 is a central longitudinal sectional view of FIG. 1, FIG. 3 is a conceptual explanatory view showing an embodiment of the present invention, and FIG. It is a block diagram explaining the control part of invention.

  Reference numeral 1 denotes a vehicle mirror according to the present invention, which will be described by taking an automobile door mirror as an example. The door mirror 1 is generally attached to the outer plate portion of a B-pillar of an automobile, and the mirror stay 2 is fixedly attached to the outer plate portion (not shown). A mirror visor 3 is provided so as to protrude from the mirror stay 2 to the outside of the vehicle. The mirror visor 3 is attached to the mirror stay 2 so as to be foldable.

  The mirror visor 3 is formed in a concave shape having an opening 31 on one side, and the mirror body 4 is attached to the opening. The mirror main body 4 is attached to the mirror visor 3 through an actuator 5 as shown in FIG. The actuator 5 is the same as a conventional door mirror, and detailed description thereof is omitted. However, the mirror body 4 is supported so as to be rotatable in any direction, up, down, left, and right. When the mirror body 4 is not rotated, the mirror body 4 Is formed so as not to move easily. The actuator 5 has a structure in which a mirror body 4 is moved by operating a built-in motor (not shown) according to an instruction from the driver's seat. The driver moves the mirror body 4 directly in the vertical and horizontal directions. The structure which adjusts the position of a mirror surface may be sufficient.

The mirror main body 4 includes a mirror 41 that can reflect the rear upper part of the vehicle, and a mirror holder 42 that supports the mirror 41 and is locked to the actuator 5 to fix the mirror 41 to the mirror visor 3.
The mirror 41 is appropriately cut into a size and is the same as in the prior art. The mirror holder 42 covers the periphery of the mirror 41 and fixes the mirror 41, and engages with the actuator 5 on the back surface side where the mirror surface of the mirror 41 is not formed.

The configuration of the door mirror 1 so far is not different from the conventional one.
In the mirror holder 42, an acceleration sensor mounting hole 42a is formed on the back side of the mirror 41, and similarly, an exciter mounting hole 42b is formed. In this embodiment, the drilling position of the acceleration sensor mounting hole 42a is on the mirror stay 2 side of the mirror visor 3 as shown in FIG. 1, and the drilling position of the vibrator mounting hole 42b is the mirror of the mirror visor 3. It is on the opposite side of stay 2.

6 is an acceleration sensor, and 7 is a vibrator. The acceleration sensor 6 can detect acceleration generated by vibration, convert it into an electrical signal, and output it as vibration information. And it adheres to the back surface of the mirror 41 through the acceleration sensor attachment hole 42a. The vibrator 7 generates a vibration having a direction and a magnitude indicated by the input vibration instruction signal. The exciter 7 is fixed to the back surface of the mirror 41 through the exciter mounting hole 42b. In this embodiment, the vibrator 7 may be an ultrasonic vibrator or a ceramic vibrator as long as it can generate vibration corresponding to the input vibration instruction signal and apply it to the mirror 41.
In this embodiment, the acceleration sensor 6 and the vibrator 7 are directly fixed to the back surface of the mirror 41. However, either or both of them may be fixed to the mirror holder 42, and vibration generated in the mirror 41 can be effectively prevented. It is only necessary that the mirror 41 can be detected and the mirror 41 can be vibrated effectively.
Further, the mounting positions of the acceleration sensor 6 and the vibrator 7 are fixed so as to be left and right on the back surface of the mirror 41, but they may be vertically arranged instead of right and left, or may be provided close to the same side. good.

Reference numeral 8 denotes a conversion control unit. The conversion control unit 8 is electrically connected to the acceleration sensor 6 and the exciter 7 by a signal line 9. As shown in FIG. 4, the conversion control unit 8 can input vibration information from the acceleration sensor 6, and an analysis unit 81 that analyzes the input vibration information and an antiphase based on the vibration analyzed by the analysis unit 81. A generating unit 82 that generates vibration information, and an output unit 83 that outputs a vibration instruction signal that allows the vibrator 7 to generate vibration based on the vibration information generated by the generating unit 82.
The signal line 9 also supplies power for operating the acceleration sensor 6 and the vibrator 7.

Next, the operation of the door mirror 1 configured as described above will be described.
When the door mirror 1 vibrates due to the influence of vehicle vibration or wind pressure, the mirror 41 vibrates. This vibration is detected by the acceleration sensor 6.
When the acceleration sensor 6 detects vibration, the vibration information is output to the conversion control unit 8.

In the conversion control unit 8, the analysis unit 81 inputs vibration information from the acceleration sensor 6. Then, the analysis unit 81 analyzes the vibration waveform from the vibration information and outputs it to the generation unit 82. The generation unit 82 generates a vibration waveform having a phase opposite to that of the input vibration waveform and outputs the vibration waveform to the output unit 83.
The output unit 83 generates and outputs a vibration instruction signal that can be generated by the exciter 7 with vibration having a phase opposite to that of the vibration information detected by the acceleration sensor 6. The vibration instruction signal output from the output unit 83 is input by the shaker 7.

Based on the input vibration instruction signal, the vibrator 7 generates a vibration having a waveform represented by the signal to vibrate the mirror 41.
Then, since the shaker 7 generates a vibration having a phase opposite to that of the mirror 41, which is the vibration detected by the acceleration sensor 6, and applies the vibration to the mirror 41, the vibration in the direction to suppress the generated vibration is applied to the mirror 41. 7, the vibration is suppressed.

  In this embodiment, the conversion control unit 8 generates a vibration instruction signal so that the vibrator 7 generates a vibration having an opposite phase. However, a vibration that finally suppresses the vibration generated in the mirror 41 is generated. For example, the generation unit 82 generates a vibration waveform to be newly generated in comparison with data obtained by verifying various vibrations generated in the mirror 41 through experiments or the like. May be generated, and the shape of the vibration waveform generated by the generation unit 82 may be based on a calculation formula or the like as appropriate.

  The present invention can be used for vehicle door mirrors, and is particularly effective when used for automobile door mirrors and motorcycle mirrors. It is also effective when applied to a vehicle having a large vibration generated by mounting a diesel engine.

Front explanatory view showing an embodiment of the present invention Description of the central vertical section of FIG. Conceptual explanatory diagram showing an embodiment of the present invention Block explanatory drawing explaining the control part of this invention Front explanatory view showing Conventional Example 1 (A) Center longitudinal cross-section explanatory drawing of FIG. 5, (b) Partial expansion explanatory drawing of (a) Front explanatory view showing Conventional Example 2

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Door mirror 2 Mirror stay 3 Mirror visor 31 Opening part 4 Mirror main body 41 Mirror 42 Mirror holder 42a Acceleration sensor attachment hole 42b Exciter attachment hole 5 Actuator 6 Acceleration sensor 7 Exciter 8 Conversion control part 81 Analysis part 82 Generation part 83 Output part

Claims (2)

In a vehicle mirror comprising a mirror body and a mirror visor that holds the mirror body,
An acceleration sensor provided in the mirror body, capable of detecting the vibration of the mirror body, converting it to a vibration signal and outputting it;
A vibrator provided on the mirror body for vibrating the mirror body based on an input instruction signal;
A conversion control unit that is electrically connected to the acceleration sensor and the exciter, can input vibration detected by the acceleration sensor, and can convert the vibration to generate a vibration instruction signal and transmit it to the shaker;
The vibration instruction signal generated by the conversion control unit is a signal that causes the vibrator to generate vibration that can suppress vibration of the waveform from the vibration waveform represented by the vibration signal input from the acceleration sensor. A pendulum generates a vibration indicated by a vibration instruction signal to vibrate a mirror body.   The vehicle mirror according to claim 1, wherein the vibration instruction signal generated by the conversion control unit is a signal that generates a vibration having an opposite phase to the vibration represented by the vibration signal input from the acceleration sensor.

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