JP2005033749A - Vehicle upholstery material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicle upholstery material not requiring treatments for the function of an acoustic device, making the sound all over in the vehicle and collecting the sound without narrowing the space in the vehicle. <P>SOLUTION: A vibrating element described in the patent application 2003-133763 is utilized. The vibrating element is molded in a body with an upholstery material of a vehicle so that the upholstery material itself is used as a vibrating element, and the whole upholstery material functions as a speaker or a microphone by giving an acoustic signal to the vibrating material. Then, the vibrating member is assembled previously while the interior of the vehicle is fabricated, and an excessive process can be eliminated. The upholstery material can be mounted not only in the inside of a ceiling or a door but in all interior parts, such as the inside of a floor and the inside of a sheet. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an in-vehicle interior material in which a vibrating body as an interior material functions as an acoustic device.

  In-car audio devices such as car stereos are generally installed inside the front door or in the trunk room, and the sound itself is generated through speaker holes formed in the lower portions of the left and right front doors and on the rear tray.

  In addition, while a conventional magnet speaker requires a space for installation, there is an example in which a thin piezoelectric element that does not require an extra space for speaker installation is used as a speaker. In this case, a piezoelectric element is attached to the surface of an interior material such as a ceiling or a door, and an audio signal is given to the piezoelectric element to vibrate and produce sound, which is used as a speaker (see, for example, Patent Document 1).

Furthermore, most conventional in-vehicle acoustic devices are used as speakers that generate sound by receiving sound signals from a sound source, and none of the same devices are used as microphones for collecting sound simultaneously. .
JP 2003-019928 A

  However, in the case of an in-vehicle acoustic device in which a magnet speaker is installed in the front door or in the trunk room, an installation space is required for that purpose, and at the same time, depending on the installation position, the sound can be heard from a considerable amount below the listener or behind the head. It is difficult to create an equal sound field throughout the car, such as more audible sounds.

  In addition, when a piezoelectric element is affixed to the interior material surface of a ceiling or a door, sound can be transmitted uniformly throughout the vehicle and there is no need to narrow the space in the vehicle, but the piezoelectric element is exposed to the surface. It is necessary to perform processing separately. Furthermore, processing such as providing a gap for vibrating the air between the vehicle inner wall and the like must be performed as necessary.

  This invention is made | formed in view of such a situation, and it is a subject to provide the vehicle-mounted interior material which can use the whole interior material as an audio device, without narrowing the space in a vehicle and without a process. And

  In the present invention, the vibrator described in Japanese Patent Application No. 2003-133663 is used. By integrally molding the vibrating body with the interior of the car, the interior material itself is used as the vibrating body, and an audio signal is given to the vibrating body so that the entire interior material functions as a speaker or a microphone. Therefore, extra vibrations are not necessary because the vibrator is built in the interior of the car in advance, and it is not limited to the interior of the ceiling or door, but also the interior of the floor, interior of the seat, dashboard, or display of equipment such as meters. It is also possible to install in any part of the vehicle interior material such as a plate, and the above problem is solved by providing the vehicle interior material as described above.

In the present invention, by using an in-vehicle interior material using a vibrating body, the entire portion where the vibrating body such as a ceiling or a door is installed can be used as a speaker or a microphone, and a larger sound generation or sound collection can be performed. it can.
At the same time, since the vibrating body uses a piezoelectric element, no special installation space is required, and when the interior material is manufactured, the vibration body is integrally formed, and if the interior material is installed, the acoustic device is also installed. It is completed and does not require installation, and no post-installation processing is required.
The sound wave generated or collected is spread to the entire interior material in which the vibrator is installed, so that sound leakage or sound escape can be minimized.

  The in-vehicle interior material of the present invention is used as an in-vehicle microphone or speaker by integrally molding a vibrating body in which a piezoelectric vibration element in which a piezoelectric element is bonded to a metal plate or resin is embedded in a resin, and the interior material of the vehicle body. It is a thing. The vibrating body can be attached to any on-vehicle interior material such as a ceiling or floor in a vehicle, a door, or a dashboard. Details will be described below using specific examples.

  FIG. 1 is a cross-sectional view when the vehicle interior material of the present invention is attached to a ceiling. In FIG. 1, the vibrating body 1 is installed so as to be embedded between the resin layer 4 that forms the ceiling portion of the car and the interior fabric 5, but not limited thereto, the vibrating body 1 is embedded when the resin layer 4 is molded. A case where it is integrally molded in a shape or a case where it is embedded between the resin layer 4 and the heat insulating material 3 is also assumed.

  The vibrating body 1 is connected in advance to a sound source through a cable inside the interior material, so that sound output from the sound source can be generated outside through the vibrating body 1. The vibrator 1 that has received the audio signal from the sound source can transmit its own vibration to the material in which it is embedded (the interior fabric 5 or the resin layer 4 or the heat insulating material 3). As a result, in any case, the vibration generated by the vibrating body 1 is spread over the entire material constituting the interior material, thereby forming one large vibrating body that vibrates the entire interior material. Therefore, the sound generated when the vibrating body 1 vibrates becomes a louder sound when the entire interior material vibrates and reverberates throughout the vehicle interior, and the ceiling itself serves as a large speaker that covers the entire upper interior of the vehicle. Can fulfill the function.

  Further, if the vibration body 1 is provided with a vibration input / output switching device in advance, the vibration body 1 can be used as a speaker and a microphone by using the switching device. That is, when the vibrator 1 is used as a microphone, the vibrator 1 installed on the ceiling collects the sound generated in the vehicle, and the voice is sent to a recording device or a voice transmitter connected to the vibrator 1 in advance. Send. Since the entire interior material of the ceiling functions as a microphone, sound can be collected regardless of where in the vehicle the sound is generated, and the sound collection range can be widened.

  When the vehicle interior material using the vibrating body 1 as a speaker or a microphone is installed on the ceiling, the vibration body 1 is surrounded by the interior material, so that the vibration generated by the vibrating body 1 does not escape to the outside. Sound signals generated or collected can be efficiently transmitted to an external or built-in recording device.

Next, an embodiment in which the vibrating body 1 is installed inside the door of a car will be described with reference to FIG.
FIG. 2 is a cross-sectional view assuming a door for a driver's seat or rear seat of a car with a handle installed on the right side. The doors for the passenger seat and the rear seat are omitted because they are symmetrical with respect to FIG.
As in the case of FIG. 1, the vibrating body 1 is not only integrally molded in such a manner that the vibrating body 1 is embedded when the resin layer 4 inside the door is molded as shown in FIG. A case of being embedded between the interior fabric 5 and the resin layer 4 or a case of being embedded in the inner door handle 6 is also assumed.

When the vibrating body 1 is installed in the door or in the door handle, the vibration of the vibrating body 1 is spread to the entire embedded area as in the case of being installed on the ceiling, and produces a louder sound or Sound can be collected.
In the case of a door, unlike the ceiling, the interior is hollow, so even if the sound waves generated by the vibrating body 1 installed inside the door, such as a speaker box, are directed in the exterior direction inside the door, Since it is a closed room, it will not be bounced off the wall and escape the sound. Rather, a big ripple effect is expected by rebounding.

  Needless to say, in addition to the above-described embodiments, it is possible to install a vibrating body in any part of an in-vehicle interior material, and these embodiments are also included in the present invention.

  It is sectional drawing which shows the vehicle interior material of this invention as a case where a vibrating body is installed in the inside of a vehicle interior ceiling.   It is sectional drawing which shows the vehicle interior material of this invention as a case where a vibrating body is installed in a door part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vibrating body 2 Car exterior top plate 3 Heat insulating material or cushioning material 4 Resin layer 5 Interior fabric 6 Inside door handle

Claims (3)

A vibrating body (Japanese Patent Application No. 2003-133663) is an interior material used for in-vehicle use,
A vehicle interior material characterized by receiving a signal from the outside and vibrating the entire interior material.   The in-vehicle interior material according to claim 1, wherein the vibrating body is a speaker.   The in-vehicle interior material according to claim 1, wherein the vibrating body is a microphone.

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