JPWO2020080311A1 - Acoustic output device - Google Patents

Abstract

The acoustic output device (1a) has an acoustic vibration output unit (10) that outputs acoustic vibration by moving the movable portion forward and backward, and an attachment portion for attaching the acoustic vibration output unit (10) to the interior surface material (120). (20) and. The mounting portion (20) has a contact portion (22, 24) that abuts on any end of the acoustic vibration output portion (10) on the advancing / retreating direction side, and a direction in which the surface portion of the interior surface material (120) expands. And the fixing part (21, 23) for fixing the acoustic vibration output part (10) to the interior surface material (120) so that the advancing / retreating direction is the same direction and the advancing / retreating direction is different from the gravity direction. And have. The abutting portions (22, 24) and the fixing portions (21, 23) are connected or integrally formed.

Description

The present invention relates to an acoustic output device. More specifically, the present invention relates to an acoustic output device including an acoustic vibration output unit that outputs acoustic vibration in the advancing / retreating direction by advancing / retreating the advancing / retreating unit.

An exciter is known as an acoustic vibration output unit that effectively generates low-frequency sounds (heavy bass). In the exciter, a movable part consisting of a yoke and a magnet is attached to the frame via a damper so as to be able to move forward and backward. A voice coil is attached to the frame via a boil coil bobbin. The moving part is moved forward and backward according to the acoustic signal input to the voice coil, and the vibration accompanying the moving back and forth is amplified by the damper and transmitted to the frame. Unlike a general speaker, the exciter does not have a vibrating film made of cone paper or the like, and the amplified vibration is transmitted to the vibrating member (vibrated body) that comes into contact with the frame, resulting in low frequencies. It has a structure that generates sound.

By positively outputting low-frequency sounds in the room, the acoustic effect in the room can be enhanced. For example, in the vehicle interior, a method of effectively outputting low-frequency sound using a subwoofer or the like is used. Today, as a method of effectively improving the distance from the speaker for low-frequency sound to the listener, sound field balance, sound image localization, etc. in the vehicle interior, a method of outputting low-frequency sound using the ceiling as a diaphragm. Has been devised (see, for example, Patent Document 1). When the ceiling is used as a diaphragm, the exciter described above is used as an example of the acoustic vibration output unit.

Jikkenhei 6-45865 (Fig. 1 and Fig. 2)

In the sound processing device described in Patent Document 1, an exciter is attached to the central portion of the ceiling surface, and the vibration output due to the vertical movement of the movable portion is transmitted to the ceiling surface and from the ceiling surface to the entire interior of the vehicle. It is configured to output low-frequency sounds.

However, the movable part is composed of a yoke and a magnet and is a relatively heavy member. When the movable part, which is a heavy member, is attached so as to be vertically movable via the damper, the movable direction (vertical direction) of the movable part of the exciter and the vertical vibration direction generated in the vehicle during traveling are in the same direction. turn into. Therefore, even when there is no signal input in the voice coil of the exciter, the damper tends to vibrate passively due to the vibration of the vehicle, which increases the load on the damper and causes a problem in the durability of the damper. There was a possibility.

It is conceivable to improve the durability of the damper by increasing the strength of the damper. In order to improve the durability of the damper against vehicle vibration, it is desirable to suppress the amplitude in the vertical movement direction of the moving part of the exciter as much as possible. However, if the amplitude is suppressed, there is a problem that it becomes difficult to reproduce sufficient deep bass, which was the original purpose.

Further, when the exciter is mounted on the ceiling surface, the vibration generated by the exciter tends to be transmitted and spread like ripples in the outer peripheral direction of the ceiling surface around the mounting position of the exciter. The farther away from the exciter mounting position, the more time lag occurs in the timing of vibration transmitted through the ceiling surface. For this reason, the low-frequency sound output through the ceiling surface is generated at different timings for each part of the ceiling surface, so that the same sound can be heard with a delay, and the listener can hear the low-frequency sound as an unpleasant sound ( There was a risk of feeling the sound quality).

In order to reduce the delay of the low-frequency sound, it is desirable to install the exciter above the listener's head. If a delay occurs and an exciter is installed near the overhead of the rear seats in the car, a delay in the low frequency sound will occur near the front seats.

The present invention is an invention made in view of the above problems, and provides an acoustic output device capable of suppressing sound delay and realizing an excellent acoustic space while reducing a load on a moving part of an exciter. The task is to do.

In order to solve the above problems, the acoustic output device according to one aspect of the present invention has an acoustic vibration output unit that outputs acoustic vibration by moving the movable portion forward and backward, and the acoustic vibration output unit for the passenger compartment. The mounting portion includes a mounting portion for mounting on the interior surface material, and the mounting portion includes a contact portion that abuts on any end of the movable portion on the advancing / retreating direction side of the acoustic vibration output portion, and the interior surface material. The acoustic vibration output portion is used as the interior surface material so that the direction in which the surface portion of the movable portion expands and the advancing / retreating direction of the movable portion are in the same direction and the advancing / retreating direction is in a direction different from the gravity direction. It has a fixing portion to be fixed, and the contact portion and the fixing portion are connected or integrally formed.

In the acoustic output device of the above aspect, since the contact portion of the mounting portion is in contact with any end of the acoustic vibration output portion on the advancing / retreating direction side of the movable portion, the output is made by advancing / retreating the movable portion. The acoustic vibration is transmitted to the contact portion as a longitudinal wave. Further, since the contact portion is connected to or integrally formed with the fixed portion, the acoustic vibration of the longitudinal wave transmitted to the contact portion is transmitted from the contact portion to the fixed portion and transmitted to the interior surface material. .. For the fixing part, the contact part and the fixing part are set in order to fix the acoustic vibration output part to the interior surface material so that the direction in which the surface part of the interior surface material expands and the advancing / retreating direction of the movable part are in the same direction. The acoustic vibration transmitted to the interior surface material via the interior surface material is transmitted as a longitudinal wave in the direction in which the surface portion of the interior surface material expands.

In general, the time for transmitting the longitudinal wave in the direction in which the surface portion of the surface member spreads is shorter than the time for transmitting the transverse wave, so that the acoustic vibration composed of the longitudinal wave is quickly transmitted to the entire interior surface material. Further, after the acoustic vibration is transmitted to the entire interior surface material, the entire interior surface material bends and vibrates in the front and back directions to generate sound. Therefore, in the acoustic output device according to the present invention, the interior surface material functions as a vibration member for converting acoustic vibration into sound, and the sound of acoustic vibration can be generated from the entire surface of the interior surface material. Become.

Further, since the acoustic vibration is transmitted as a longitudinal wave in the direction in which the surface portion of the interior surface material spreads, it is possible to suppress the vibration delay of the acoustic vibration that may occur depending on the portion of the interior surface material. For this reason, when acoustic vibration is generated as sound from the entire surface of the interior surface material, it is possible to suppress the generation of unpleasant sound (sound quality) that may occur due to a delay in acoustic vibration, etc. It is possible to realize a new acoustic space.

Further, since the acoustic vibration output unit is fixed to the interior surface material so that the advancing / retreating direction of the movable portion is different from the gravity direction, the advancing / retreating direction of the movable portion may occur in the vehicle during traveling. The direction can be different from the vertical vibration direction. Therefore, it is possible to reduce the load on the attachment portion (for example, damper, spring, etc.) of the movable portion, which may occur due to the vibration of the vehicle, and it is possible to maintain the durability of the movable portion for a long time. ..

Further, in the acoustic output device of the above aspect, the contact portion may also contact the cross section of the interior surface material.

Since the abutting portion of the mounting portion abuts on any end of the moving portion on the advancing / retreating direction side of the acoustic vibration output portion, the acoustic vibration is transmitted to the abutting portion as a longitudinal wave. Further, when the contact portion also contacts the cross section of the interior surface material, the longitudinal wave transmitted to the contact portion is transmitted from the cross section to the interior surface material, and the direction in which the surface portion of the interior surface material spreads. Is transmitted to. Therefore, it is possible to transmit the longitudinal wave more directly to the interior surface material, and further, it is possible to directly guide the longitudinal wave transmitted from the cross section in the direction in which the surface portion of the interior surface material spreads. Become. Therefore, the acoustic vibration spreads to the entire interior surface material more quickly, and the vibration delay of the acoustic vibration that may occur depending on the portion of the interior surface material can be suppressed more effectively. In addition, when acoustic vibration is generated as sound from the entire surface of the interior surface material, it is possible to suppress the generation of unpleasant sound (sound quality) that may occur due to delay in acoustic vibration, etc. It becomes possible to realize an acoustic space.

Further, in the acoustic output device of the above aspect, the fixing portion may have a contact surface that abuts on the surface portion of the interior surface material.

In the acoustic output device of the above aspect, the acoustic vibration of the longitudinal wave is transmitted to the fixed portion via the contact portion formed jointly or integrally, and the acoustic vibration transmitted to the fixed portion is transferred to the interior surface material. Be transmitted. When the fixed portion has an abutting surface that abuts on the surface portion of the interior surface material, acoustic vibration is transmitted to the interior surface material through the abutting surface of the fixed portion, so that the force of the longitudinal wave is less likely to weaken. , It becomes possible to more effectively transmit acoustic vibration consisting of longitudinal waves to the interior surface material.

Further, in the acoustic output device of the above aspect, the contact surface may be a long surface extending in a direction orthogonal to the advancing / retreating direction.

As described above, when the fixed portion has an abutting surface that abuts on the surface portion of the interior surface material, the acoustic vibration of the longitudinal wave is transmitted to the interior surface material through the abutting surface of the fixed portion. Here, since the acoustic vibration is a longitudinal wave in the advancing / retreating direction of the movable part, the interior surface material is quickly transmitted in the advancing / retreating direction, but is transmitted in the direction orthogonal to the advancing / retreating direction. It may be late. In particular, the interior surface material for the interior of a vehicle is a part that the user touches, so there is a high tendency to use a soft material instead of a hard material. For this reason, by providing a contact surface consisting of a long surface extending in a direction orthogonal to the advancing / retreating direction in the fixed portion of the mounting portion, when acoustic vibration is transmitted to the fixed portion, the contact surface is oriented in the elongated direction. Acoustic vibration can be transmitted to the interior surface material in a state where the longitudinal wave is spread. Therefore, the long and long contact surface can simultaneously transmit the acoustic vibration consisting of longitudinal waves to the interior surface material, and the acoustic vibration can be quickly transmitted to the entire interior surface material.

Further, in the acoustic output device of the above aspect, the interior surface material to which the fixed portion is in contact is provided with a communication hole for communicating from the contact surface of the fixed portion to the inside of the vehicle interior. May be good.

In the acoustic output device of the above aspect, the interior surface material to which the fixed portion is in contact is provided with a communication hole that communicates from the contact surface of the fixed portion to the inside of the vehicle interior. Therefore, when vibrations for the mid-high range are generated on the contact surface of the fixed portion, it is possible to transmit high-quality mid-high range sound to the vehicle interior through the communication holes provided in the interior surface material. become. Therefore, it is possible for the listener in the vehicle interior to not only experience the low-frequency sound output by vibrating the interior surface material, but also to experience the mid-high range sound transmitted through the communication hole.

Further, the acoustic output device of the above aspect may have a vibration transmission surface material between the mounting portion and the interior surface material.

Since the acoustic output device of the above aspect has a vibration transmission surface material between the mounting portion and the interior surface material, the acoustic vibration output by the acoustic vibration output portion and transmitted to the mounting portion is transmitted by vibration. Through the face material, it becomes possible to transmit to a wide range of the interior face material. Therefore, it is possible to prevent the acoustic vibration transmitted to the mounting portion from being absorbed by the interior surface material.

In the acoustic output device according to the embodiment of the present invention, the contact portion of the mounting portion is in contact with any end of the acoustic vibration output portion on the advancing / retreating direction side of the movable portion, so that the moving portion advances / retreats. The acoustic vibration output by the motion is transmitted to the contact portion as a longitudinal wave. Further, since the abutting portion is connected to or integrally formed with the fixed portion, the acoustic vibration consisting of longitudinal waves transmitted to the abutting portion is transmitted from the abutting portion to the fixed portion and transmitted to the interior surface material. NS.

For the fixing part, the contact part and the fixing part are set in order to fix the acoustic vibration output part to the interior surface material so that the direction in which the surface part of the interior surface material expands and the advancing / retreating direction of the movable part are in the same direction. The acoustic vibration transmitted to the interior surface material via the interior surface material is transmitted as a longitudinal wave in the direction in which the surface portion of the interior surface material expands. Since the acoustic vibration is transmitted as a longitudinal wave in the direction in which the surface portion of the interior surface material spreads, it is possible to suppress the vibration delay of the acoustic vibration that may occur depending on the portion of the interior surface material. For this reason, when acoustic vibration is generated as sound from the entire surface of the interior surface material, it is possible to suppress the generation of unpleasant sound (sound quality) that may occur due to a delay in acoustic vibration, etc. It is possible to realize a new acoustic space.

Further, since the acoustic vibration output unit is fixed to the interior surface material so that the advancing / retreating direction of the movable portion is different from the gravity direction, the advancing / retreating direction of the movable portion may occur in the vehicle during traveling. The direction can be different from the vertical vibration direction. Therefore, it is possible to reduce the load on the attachment portion (for example, damper, spring, etc.) of the movable portion, which may occur due to the vibration of the vehicle, and it is possible to maintain the durability of the movable portion for a long time. ..

(A) is a side sectional view showing a state in which the acoustic output device according to the first embodiment is installed on the ceiling surface material for interior, and (b) is a rear view shown from the rear of the vehicle. (A) is an enlarged view of the acoustic output device shown in FIG. 1 (a), and (b) is a rear view showing an acoustic output device installed on an interior ceiling surface material composed of curved surfaces. be. It is a perspective view which showed the acoustic output device which concerns on Embodiment 1. FIG. It is a developed perspective view which showed the acoustic output device which concerns on Embodiment 1. FIG. (A) is a side sectional view showing a state in which the acoustic output device according to the second embodiment is installed on the ceiling surface material for interior, and (b) is a rear view shown from the rear of the vehicle. (A) is a side sectional view showing a state in which the acoustic output device according to the third embodiment is installed on the ceiling surface material for interior, and (b) is a rear view shown from the rear of the vehicle. It is a perspective view which showed the mounting bracket of the acoustic output device which concerns on Embodiment 3. FIG. (A) is a front view seen from the inside of the vehicle showing a state in which the acoustic output device according to the fourth embodiment is installed in the vehicle door, and (b) is a cross-sectional view taken along the line AA of (a). It is a horizontal cross-sectional view which showed, (c) is a vertical cross-sectional view which showed the BB cross section of (a). (A) is a side sectional view showing a state in which the acoustic output device according to the fifth embodiment is installed on the ceiling surface material for interior, and (b) is a rear view shown from the rear of the vehicle. (A) is a side sectional view showing a state in which the acoustic output device according to the sixth embodiment is installed on the ceiling surface material for interior, and (b) shows a state in which the front is visually recognized from the rear of the vehicle. It is a rear view.

Hereinafter, the acoustic output device according to the embodiment of the present invention will be described in detail with reference to some examples.

[Embodiment 1]
FIG. 1A is a side view showing a state in which the acoustic output device according to the first embodiment is installed on the ceiling of the vehicle. FIG. 1B is a rear view showing an acoustic output device in a state where the front is visually recognized from the rear of the vehicle. In FIG. 1A, the right side of the paper shows the front of the vehicle.

The ceiling portion 100 of the vehicle shown in FIG. 1A is an exterior ceiling surface material (roof outer panel) 110 constituting the outer ceiling of the vehicle and an interior ceiling surface material constituting the ceiling inside the vehicle (vehicle interior). It is roughly composed of (roof trim, interior surface material) 120 and a frame member (not shown) for reinforcing the exterior ceiling surface material 110.

The exterior ceiling surface material 110 is an exterior surface that constitutes the design of the vehicle, and is a member for ensuring waterproofness and dustproofness in the ceiling portion 100. The ceiling surface material 110 for the exterior is generally made of an iron plate, and today, a high-strength steel plate, aluminum, or the like may be used.

The interior ceiling surface material 120 is often formed of an elastic material having a lower strength than the exterior ceiling surface material 110. The interior ceiling surface material 120 suppresses noise and vibration outside the vehicle from entering the vehicle through the exterior ceiling surface material 110, and also has a role of ensuring heat retention and moisture retention inside the vehicle and improving quietness. have. As the interior ceiling surface material 120, for example, a urethane material having flame retardancy or the like is used.

The interior ceiling surface material 120 is generally configured as a single plate material that covers the ceiling portion 100 from the left end portion to the right end portion and further from the front side end portion to the rear side end portion. Further, since the interior ceiling surface material 120 is formed of an elastic material such as a urethane material, vibration tends to occur more easily in the vertical direction (front and back direction) than in the front-back and left-right directions.

The acoustic output device 1a according to the first embodiment is provided at the rear end portion of the ceiling portion 100, for example, the rear end portion of the interior ceiling surface material 120. FIG. 2A shows an enlarged side view of the acoustic output device 1a of FIG. 1A, FIG. 3 shows a perspective view thereof, and FIG. 4 shows a developed perspective view thereof. The acoustic output device 1a has an exciter (acoustic vibration output unit) 10 and a mounting bracket (mounting unit) 20.

As shown in FIG. 2A, the exciter 10 is roughly composed of a movable portion 11 and a frame 12. The movable portion 11 includes a bottomed tubular first yoke 13, a disk-shaped magnet 14 laminated in the center of the inside of the first yoke 13, and a disk-shaped second yoke 15 laminated on the disk-shaped magnet 14. And have. The diameter of the disk-shaped magnet 14 and the disk-shaped second yoke 15 is smaller than the inner diameter of the cylinder of the first yoke 13. A gap is formed between the inner surface 16 of the first yoke 13 and the outer surface of the disk-shaped magnet 14 and the second yoke 15 facing the inner surface 16.

The frame 12 has a bottomed tubular shape having an internal diameter wider than the outer shape of the first yoke 13. A damper 17 is provided on the bottomed tubular opening edge. The movable portion 11 can move forward and backward to and from the frame 12 via the damper 17 in a state where the open tubular end portion of the first yoke 13 faces the bottomed portion of the frame 12 and the body half is inserted inside the frame 12. Attached to.

One end 18a of the cylindrical voice coil bobbin 18 is fixed to the inner surface of the frame 12 facing the first yoke 13. Further, the other end 18b of the voice coil bobbin 18 extends into a gap between the inner surface 16 of the first yoke 13 and the outer surface of the disk-shaped magnet 14 and the second yoke 15. A voice coil 19 is attached to the outer peripheral surface of the extended other end 18b, which is the side surface of the first yoke 13 facing the inner side surface 16.

By inputting an acoustic signal to the voice coil 19 of the exciter 10 configured in this way, the movable portion 11 including the first yoke 13, the disk-shaped magnet 14, and the second yoke 15 moves back and forth to vibrate. generate. By transmitting the vibration generated by the movable portion 11 to the frame 12 via the damper 17, the acoustic vibration is transmitted to the mounting bracket 20 that comes into contact with the frame 12.

The mounting bracket 20 functions as a mounting portion for mounting the exciter 10 to the interior ceiling surface material 120. The mounting bracket 20 has an upper surface contact portion (fixed portion) 21 that abuts on the upper surface of the interior ceiling surface material 120 and a side surface contact portion (contact) that abuts on the rear side surface (cross-sectional portion) of the interior ceiling surface material 120. A portion) 22 and a support portion (fixed portion) 23 that supports the exciter 10 from below and functions as a decorative member at the rear portion of the interior ceiling surface material 120 so that the exciter 10 cannot be seen from the inside of the vehicle. It is configured. Each of the top surface contact portion 21, the side surface contact portion 22, and the support portion 23 is a plate material having a common longitudinal dimension. As shown in FIGS. 1 (b), 3 and 4, the mounting bracket 20 has such that the long directions of the upper surface contact portion 21, the side contact portion 22 and the support portion 23 are in the left-right direction of the vehicle. It is attached to the ceiling surface material 120 for interior.

The end portion of the support portion 23 is connected to the lowermost portion of the side contact portion 22 that stands up, and the support portion 23 is fixed so as to be horizontal toward the rear of the vehicle. Further, the rear end portion of the upper surface contact portion 21 is connected to the uppermost portion of the side surface contact portion 22, and the upper surface contact portion 21 is fixed so as to be horizontal toward the front of the vehicle. Further, in the central portion of the upper surface contact portion 21 with respect to the longitudinal direction, the frame contact portion (this) that abuts on the frame 12 of the exciter 10 by standing flush with the rear side surface of the side contact portion 22. A tangent portion) 24 is provided (connected). The top surface contact portion 21, the side surface contact portion 22, the support portion 23, and the frame contact portion 24 may be integrally formed by one member.

The exciter 10 is placed on the support portion 23 so that the front outer surface 12a of the frame 12 abuts on the upright side contact portion 22 and the frame contact portion 24. As described above, since the frame contact portion 24 is provided at the central portion of the upper surface contact portion 21 in the longitudinal direction, when the exciter 10 comes into contact with the frame contact portion 24, the exciter 10 is attached to the mounting bracket. It will be in the state of being attached to the center position of 20. At this time, the exciter 10 is attached to the mounting bracket 20 so that the vibration direction of the movable portion 11 is the front-rear direction of the vehicle as shown in FIG. 2A.

A notch 120a for mounting the mounting bracket 20 is provided at the rear end of the interior ceiling surface material 120. The cutout portion 120a is formed so that the vehicle is elongated in the left-right direction. The dimensions of the notch portion 120a correspond to the dimensions of the lower surface of the support portion 23, and the hole of the notch portion 120a is formed in a state where the mounting bracket 20 is attached to the rear end portion of the interior ceiling surface material 120. The structure is such that the lower surface of the support portion 23 is flush with the lower surface of the interior ceiling surface material 120 while being closed by the support portion 23.

When the mounting bracket 20 is attached to the interior ceiling surface material 120 by closing the notch 120a of the interior ceiling surface material 120 with the support portion 23, the front side surface of the side contact portion 22 becomes the interior ceiling surface material. Along with contacting the cross section of 120, the lower surface 21a (contact surface) of the upper surface contact portion 21 abuts on the upper surface (surface portion) of the interior ceiling surface material 120.

When an acoustic signal is input to the voice coil 19 in a state where the exciter 10 is attached to the interior ceiling surface material 120 via the attachment bracket 20 in this way, the energization by the acoustic signal and the magnetic field by the disk-shaped magnet 14 are performed. As a result, a force in the front-rear direction of the vehicle (a force based on Fleming's left-hand rule) is generated. This force causes the movable portion 11 to move forward and backward in the vehicle. The acoustic vibration generated by the advancing / retreating of the movable portion 11 is amplified via the damper 17 and transmitted to the frame 12, and the side contact portion 22 and the frame contact portion of the mounting bracket 20 that abut the front outer surface 12a of the frame 12. It is transmitted to 24.

The acoustic vibration transmitted from the exciter 10 to the mounting bracket 20 is vibration that advances and retreats in the front-rear direction of the vehicle. Therefore, the acoustic vibration transmitted to the mounting bracket 20 passes through the rear side surface (cross section) of the interior ceiling surface material 120, the side surface contact portion 22 that abuts on the upper surface, and the upper surface contact portion 21 (lower surface 21a). It is transmitted to the front side direction (front direction of the vehicle) of the ceiling surface material 120 for interior. Here, the longitudinal wave is characterized in that the transmission speed of vibration is faster than that of the transverse wave. Therefore, the longitudinal waves input from the rear side surface (cross section) and the upper surface of the interior ceiling surface material 120 toward the front direction of the vehicle are quickly transmitted to the front of the interior ceiling surface material 120.

In particular, as shown in FIGS. 1B, 3 and 4, the side contact portion 22 and the upper surface contact portion 21 are arranged so that the elongated direction is the left-right direction of the vehicle and the ceiling surface material 120 for interior is provided. It is attached to. Therefore, the acoustic vibration of the longitudinal wave transmitted from the exciter 10 to the mounting bracket 20 passes through the long contact surfaces of the side contact portion 22 and the upper surface contact portion 21 (lower surface 21a) to the interior ceiling. It is transmitted to the rear side surface and the upper surface of the face material 120 all at once. Therefore, the acoustic vibration of the longitudinal wave transmitted from the rear side surface and the upper surface of the interior ceiling surface material 120 via the long contact surfaces on the left and right is quickly transmitted to the entire interior ceiling surface material 120.

Further, the acoustic vibration of the longitudinal wave quickly transmitted to the entire surface of the interior ceiling surface material 120 causes the entire surface of the interior ceiling surface material 120 to vibrate to generate a low frequency sound toward the inside of the vehicle. As described above, the interior ceiling surface material 120 is often integrally molded with an elastic material, for example, a urethane material or the like. Therefore, the interior ceiling surface material 120, which is an integrally formed surface material, is relatively easy to bend in the vertical direction (front and back directions). Therefore, when the acoustic vibration of the longitudinal wave quickly transmitted to the entire interior ceiling surface material 120 vibrates the entire surface of the interior ceiling surface material 120, the interior ceiling surface material 120 is moved in the vertical direction. The bending makes it possible to vibrate a wide range of the ceiling surface material 120 for interior in the vertical direction.

In this way, when the interior ceiling surface material 120 vibrates in the vertical direction, the interior ceiling surface material 120 functions as a diaphragm of the exciter 10 to positively generate sound. Even when the interior ceiling surface material 120 serves as the diaphragm of the exciter 10, the acoustic vibration which is a longitudinal wave is quickly transmitted to the entire interior ceiling surface material 120, and the entire surface of the interior ceiling surface material 120 is transmitted. Therefore, it is possible to suppress the delay of sound due to the portion of the ceiling surface material 120 for interior decoration. Therefore, it is possible to suppress the generation of unpleasant sound (sound quality) due to the delay of the low-frequency sound generated through the ceiling surface material 120 for the interior, and it is possible to realize an excellent acoustic space without a sense of discomfort. Become.

Further, since the entire interior ceiling surface material 120 can be vibrated without causing a delay in the transmission of the acoustic vibration, the acoustic vibration output from the exciter 10 is vibrated by the wide surface of the interior ceiling surface material 120. This makes it possible to enhance the acoustic effect of low-frequency sounds. Further, since the entire surface of the interior ceiling surface material 120 can be vibrated, for example, the low-frequency sound heard by a listener seated near the front seat in the vehicle and a listener seated near the rear seat. There is no delay. Therefore, the listener can experience high-quality low-frequency sound regardless of the seating position of the listener.

Further, the exciter 10 is attached to a central portion of the attachment bracket 20 in the longitudinal direction. Therefore, when the acoustic vibration of the exciter 10 is transmitted to the interior ceiling surface material 120 via the mounting bracket 20, the acoustic vibration can be transmitted in the left-right direction of the mounting bracket 20 in a well-balanced manner, and the acoustic vibration can be transmitted to the interior ceiling. Acoustic vibration can be evenly transmitted to the entire face material 120.

Further, since the exciter 10 is mounted on the support portion 23, it is possible to prevent the exciter 10 from being exposed inside the vehicle. Further, since the lower surface of the support portion 23 is flush with the lower surface of the interior ceiling surface material 120, it is difficult to notice that the mounting bracket 20 is installed in the vehicle, and the texture inside the vehicle can be improved. It will be possible.

Further, since the moving / retreating direction of the movable portion 11 of the exciter 10 is the front-rear direction of the vehicle, the vertical vibration direction generated in the vehicle during traveling is different from the advancing / retreating direction of the movable portion. Therefore, when there is no input of an acoustic signal to the voice coil 19 of the exciter 10, it is possible to prevent the damper 17 from passively vibrating due to the vibration of the vehicle. Therefore, it is possible to reduce the load on the damper 17 and maintain the durability of the damper 17 for a long time.

In the acoustic output device 1a according to the first embodiment, a case where the exciter 10 and the mounting bracket 20 are provided at the rear end portion of the interior ceiling surface material 120 has been described as an example. However, the installation position of the acoustic output device 1a is not necessarily limited to the rear end portion of the interior ceiling surface material 120, and may be installed at another location. For example, it may be the front end portion of the interior ceiling surface material 120, or may be the left end portion or the right end portion of the interior ceiling surface material 120.

Further, in the acoustic output device 1a according to the first embodiment, the mounting bracket 20 is used for interior decoration so that the long directions of the upper surface contact portion 21, the side contact portion 22, and the support portion 23 are the left and right directions of the vehicle. The case of attaching to the ceiling surface material 120 has been described. However, the mounting direction of the mounting bracket 20 is not limited to the elongated direction of the top surface contact portion 21, the side surface contact portion 22, and the support portion 23 being the left-right direction of the vehicle.

For example, the mounting bracket 20 is attached to the left end or right end of the interior ceiling surface material 120 so that the long directions of the top contact portion 21, the side contact portion 22, and the support portion 23 are in the front-rear direction of the vehicle. It may be attached to. Even in this case, the side contact portion 22 is brought into contact with the side surface of the interior ceiling surface material 120, or the lower surface 21a of the upper surface contact portion 21 is brought into contact with the upper surface of the interior ceiling surface material 120. By bringing them into contact with each other, the acoustic vibration output from the exciter 10 can be transmitted to the ceiling surface material 120 for interior as a longitudinal wave. Since the entire interior ceiling surface material 120 can be vibrated without causing a delay in the transmission of the acoustic vibration, the acoustic vibration output from the exciter 10 can be vibrated by the wide surface of the interior ceiling surface material 120. This makes it possible to enhance the acoustic effect of low-frequency sounds.

Further, although the interior ceiling surface material 120 shown in FIGS. 1, 2 (a), 3 and 4 has a substantially plate shape, the interior ceiling surface material 120 is an interior ceiling surface material. Therefore, in many cases, the central portion of the ceiling surface material 110 for exterior has a curved surface shape that gently protrudes according to the curved surface shape of the ceiling surface material 110. When the upper surface or the lower surface of the interior ceiling surface material 120 is composed of a curved surface, the shape of the lower surface 21a of the upper surface contact portion 21 is set to a curved surface shape corresponding to the curved surface shape of the upper surface of the interior ceiling surface material 120. It is desirable that the lower surface 21a of the contact portion 21 is brought into contact with the upper surface of the interior ceiling surface material 120.

FIG. 2B is a rear view showing a state in which the interior ceiling surface material 120 is attached to the interior ceiling surface material 120 with the shape of the upper surface contact portion 21 as a curved surface shape when the interior ceiling surface material 120 is composed of a curved surface. .. As shown in FIG. 2B, the shape of the lower surface 21a of the upper surface contact portion 21 is a curved surface shape corresponding to the upper surface of the interior ceiling surface material 120, and is brought into contact with the upper surface of the interior ceiling surface material 120. , The mounting bracket 20 can be mounted on the interior ceiling surface material 120 in a reliable and stable state. Further, by attaching the mounting bracket 20 to the interior ceiling surface material 120 in a reliable and stable state, it is possible to reliably and stably transmit the acoustic vibration output from the exciter 10 to the interior ceiling surface material 120. Become.

Further, by making the shape of the lower surface of the support portion 23 a curved surface shape corresponding to the lower surface of the interior ceiling surface material 120, the lower surface of the support portion 23 and the lower surface of the interior ceiling surface material 120 are made a continuous curved surface shape. Is preferable. By forming the lower surface of the support portion 23 and the lower surface of the ceiling surface material 120 for interior into a continuous curved surface shape, it is difficult for the user in the vehicle to notice that the mounting bracket 20 is installed, and the texture inside the vehicle is improved. Will be possible.

[Embodiment 2]
In the acoustic output device 1a according to the first embodiment, a case where the sound output device 1a is installed at the rear side end portion, the front side end portion, the left side end portion, or the right side end portion of the interior ceiling surface material 120 has been described. However, the installation position of the acoustic output device is not necessarily limited to the end portion of the interior ceiling surface material 120.

FIG. 5A is a side view showing a state in which the acoustic output device 1b according to the second embodiment is installed on the interior ceiling surface material 120, and FIG. 5B is a rear view thereof. Comparing the acoustic output device 1b according to the second embodiment and the acoustic output device 1a according to the first embodiment, they are common in that the exciter 10 is provided, but are different in that the shape of the mounting bracket is different. In the second embodiment, the same components as those in the first embodiment are designated by the same reference numerals, and the description thereof will be omitted.

The acoustic output device 1b has an exciter 10 and a mounting bracket (mounting portion) 30. The mounting bracket 30 has a flat plate-shaped side surface contact portion (contact portion) 31 having a convex shape and a rectangular top surface contact portion having the same length as the bottom side (long side) of the side surface contact portion 31. It has a portion (fixed portion) 32. The side surface contact portion 31 and the top surface contact portion 32 are connected at the long side portion and have an L-shaped cross-sectional shape when viewed from the side surface. The side surface contact portion 31 and the top surface contact portion 32 may be integrally formed by one member.

The mounting bracket 30 has a role of installing (fixing) the exciter 10 on the interior ceiling surface material 120. The upper surface contact portion 32 is in a state where the lower surface (contact surface) 32a of the upper surface contact portion 32 is in contact with the upper surface of the interior ceiling surface material 120 so that the elongated direction faces the left-right direction of the vehicle. It is fixed to the ceiling surface material 120 for interior. The side surface contact portion 31 connected to the top surface contact portion 32 is fixed in an upright state so as to be perpendicular to the interior ceiling surface material 120. The frame 12 of the exciter 10 is fixed to the upright side contact portion 31. The convex protruding portion of the side contact portion 31 has dimensions corresponding to the frame width and height of the exciter 10, and corresponds to the frame contact portion 24 in the first embodiment.

The exciter 10 is fixed to the interior ceiling surface material 120 via the mounting bracket 30 so that the vibration direction of the movable portion 11 is in the front-rear direction of the vehicle. When fixed in this way, the end surface (front side outer surface 12a) of the frame 12 on the vibration direction side of the movable portion 11 is in contact with the side surface contact portion 31. The exciter 10 and the mounting bracket 30 are provided in the vicinity of the central portion of the interior ceiling surface material 120, that is, in the vicinity of the central portion in the front-rear direction of the vehicle and in the vicinity of the central portion in the left-right direction of the vehicle.

In this way, when an acoustic signal is input to the voice coil 19 with the exciter 10 and the mounting bracket 30 attached to the interior ceiling surface material 120, the movable portion 11 is moved back and forth in the front-rear direction of the vehicle. The acoustic vibration generated by the advance / retreat of the movable portion 11 is amplified via the damper 17 and transmitted to the frame 12, and is transmitted to the side contact portion 31 of the mounting bracket 30 that abuts on the front surface (front side outer surface 12a) of the frame 12. Will be done.

The acoustic vibration transmitted from the exciter 10 to the side contact portion 31 is a vibration that advances and retreats in the front-rear direction of the vehicle. The acoustic vibration input from the side contact portion 31 to the mounting bracket 30 is transmitted to the upper surface contact portion 32 connected to the side contact portion 31 by transmitting the acoustic vibration of the longitudinal wave advancing and retreating in the front-rear direction. The acoustic vibration is transmitted to the interior ceiling surface material 120 that abuts on the upper surface contact portion 32. Since the acoustic vibration transmitted to the interior ceiling surface material 120 is a longitudinal wave, the acoustic vibration is rapidly transmitted from the vicinity of the central portion of the interior ceiling surface material 120 to the outside.

In particular, as shown in FIG. 5B, since the side contact portion 31 and the top contact portion 32 are long in the left-right direction, the acoustic vibration of the longitudinal wave transmitted from the exciter 10 to the mounting bracket 30 Maintains a constant width (at least the long length of the upper surface contact portion 32) in the left-right direction of the interior ceiling surface material 120 via the long contact surface (lower surface 32a) of the upper surface contact portion 32. It is transmitted all at once in the front-back direction. The acoustic vibration of the longitudinal wave transmitted in this way is quickly transmitted to the entire interior ceiling surface material 120.

Further, the acoustic vibration of the longitudinal wave quickly transmitted to the entire surface of the interior ceiling surface material 120 causes the entire surface of the interior ceiling surface material 120 to vibrate to generate a low frequency sound for the inside of the vehicle. As described above, the interior ceiling surface material 120, which is an integrally formed surface material, is relatively easy to bend in the vertical direction (front and back directions). Therefore, when the acoustic vibration of the longitudinal wave quickly transmitted to the entire interior ceiling surface material 120 vibrates the entire surface of the interior ceiling surface material 120, the vertical direction of the interior ceiling surface material 120 is increased. Due to the bending of the ceiling surface material 120, a wide range of the ceiling surface material 120 for interior can be vibrated in the vertical direction.

In this way, when the interior ceiling surface material 120 vibrates in the vertical direction, the interior ceiling surface material 120 functions as a diaphragm of the exciter 10 to positively generate sound. Even when the interior ceiling surface material 120 serves as an exciter diaphragm, acoustic vibration, which is a longitudinal wave, is quickly transmitted to the entire interior ceiling surface material 120, and the entire surface of the interior ceiling surface material 120 is covered. Since it vibrates, it is possible to suppress the delay of sound due to the portion of the ceiling surface material 120 for interior decoration. Therefore, it is possible to suppress the generation of unpleasant sound (sound quality) due to the delay of the low-frequency sound generated from the ceiling surface material, and it is possible to realize an excellent acoustic space without a sense of discomfort.

Further, since the entire surface of the interior ceiling surface material 120 can be vibrated without causing a delay in the transmission of the acoustic vibration, the acoustic vibration output from the exciter 10 is vibrated over a wide surface of the interior ceiling surface material 120. It is possible to enhance the acoustic effect of low-frequency sounds. Further, since the entire surface of the interior ceiling surface material 120 can be vibrated, for example, the low-frequency sound heard by a listener seated near the front seat in the vehicle and a listener seated near the rear seat. There is no delay. Therefore, it is possible to experience high-quality low-frequency sound regardless of the seating position of the listener.

Further, the exciter 10 and the mounting bracket 30 are mounted near the central portion of the interior ceiling surface material 120. Therefore, the acoustic vibration of the exciter 10 can be transmitted in a well-balanced manner from the vicinity of the central portion of the interior ceiling surface material 120 to the front-rear direction and the left-right direction via the mounting bracket 30, and the interior ceiling surface material 120 can be transmitted. It becomes possible to evenly transmit acoustic vibration to the whole.

Further, since the moving / retreating direction of the movable portion 11 of the exciter 10 is the front-rear direction of the vehicle, the vertical vibration direction generated in the vehicle during traveling is different from the advancing / retreating direction of the movable portion 11. Therefore, when there is no signal input to the voice coil 19 of the exciter 10, it is possible to prevent the damper 17 from passively vibrating due to the vibration of the vehicle, reducing the load on the damper 17 and reducing the load on the damper 17. It becomes possible to maintain the durability of the coil for a long time.

In the acoustic output device 1b according to the second embodiment, a case where the exciter 10 and the mounting bracket 30 are provided near the central portion of the interior ceiling surface material 120 has been described as an example. However, the installation position of the acoustic output device 1b is not necessarily limited to the vicinity of the central portion of the interior ceiling surface material 120, and may be installed at another location. For example, when the interior ceiling surface material 120 is long in the front-rear direction and the rear portion of the interior ceiling surface material 120 corresponds to the ceiling portion of the luggage compartment, as in a station wagon or a one-box vehicle. It is preferable to install the sound output device 1b in the front portion of the ceiling surface material 120 for interior, that is, the portion where the seat is installed.

Further, in the acoustic output device 1b according to the second embodiment, the mounting bracket 30 is attached to the ceiling surface material 120 for interior so that the long direction of the side contact portion 31 and the upper surface contact portion 32 is the left-right direction of the vehicle. The case of mounting was described. However, the mounting direction of the mounting bracket 30 is not limited to the elongated direction of the side contact portion 31 and the top surface contact portion 32 being the left-right direction of the vehicle.

For example, the mounting bracket 30 may be attached to the interior ceiling surface material 120 so that the long directions of the side contact portion 31 and the upper surface contact portion 32 are in the front-rear direction of the vehicle. Even when the mounting bracket 30 is attached to the interior ceiling surface material 120 in this way, the acoustic vibration output from the exciter 10 can be transmitted to the interior ceiling surface material 120 as a longitudinal wave. Therefore, since the entire surface of the interior ceiling surface material 120 can be vibrated without causing a delay in the transmission of the acoustic vibration, the acoustic vibration output from the exciter 10 can be generated by the wide surface of the interior ceiling surface material 120. It becomes possible to vibrate, and it becomes possible to enhance the acoustic effect of low-frequency sound.

When the upper surface of the interior ceiling surface material 120 is composed of a curved surface, the shape of the lower surface 32a of the upper surface contact portion 32 is set to a curved surface shape corresponding to the curved surface shape of the upper surface of the interior ceiling surface material 120, and the lower surface is formed. It is desirable to bring 32a into contact with the interior ceiling surface material 120. By bringing the lower surface 32a of the upper surface contact portion 32 into contact with the upper surface of the interior ceiling surface material 120, the mounting bracket 30 can be attached to the interior ceiling surface material 120 in a reliable and stable state. Further, by attaching the mounting bracket 30 to the interior ceiling surface material 120 in a reliable and stable state, it is possible to reliably and stably transmit the acoustic vibration output from the exciter 10 to the interior ceiling surface material 120. Become.

[Embodiment 3]
FIG. 6A is a side view showing a state in which the acoustic output device according to the third embodiment is installed on the ceiling of the vehicle, and FIG. 6B is a rear view showing a state in which the front is visually recognized from the rear of the vehicle. It is a figure. As the exciter used in the acoustic output device 1c according to the third embodiment, one having a structure different from that of the exciter 10 used in the first embodiment and the second embodiment is used.

A general exciter has a configuration in which acoustic vibration output as a moving part moves forward and backward is transmitted to a vibrating member (vibrated body) via a frame, and low-frequency sound is output from the vibrating member. There is. The exciter (acoustic vibration output unit) 40 according to the third embodiment not only transmits the acoustic vibration output as the moving portion moves forward and backward to the vibrating member via the frame to output low-frequency sound. , A vibrating member 40a is installed in the opening on one end side of the voice coil bobbin provided in the movable portion, and it is possible to output a high-mid range sound via the vibrating member (see, for example, Patent No. 6325957). ).

As shown in FIGS. 6A and 6B, in the acoustic output device 1c according to the third embodiment, the mounting brackets (mounting portions) 50 are located at the left and right positions on the rear end portion of the interior ceiling surface material 120. Exciters 40 are installed one by one via. FIG. 7 is a perspective view showing the mounting bracket 50. The mounting bracket 50 has a rectangular upper surface contact portion (fixing portion) 51 that is elongated in the left-right direction of the vehicle and a rectangular side contact portion (fixed portion) 51 that abuts on the rear end portion of the interior ceiling surface material 120. It has a contact portion) 52 and support portions (fixing portions) 53 provided at the left and right ends of the side contact portion 52, respectively.

The upper surface contact portion 51 is brought into contact with the interior ceiling surface material 120 in a state where the lower surface (contact surface) 51a of the upper surface contact portion 51 is in contact with the upper surface of the rear end portion of the interior ceiling surface material 120. It is fixed. The side surface contact portion 52 is connected to the rear end edge of the top surface contact portion 51 so as to be perpendicular to the top surface contact portion 51. The side contact portion 52 is long in the left-right direction and is further formed at a central portion (contact portion) 52a that abuts on the rear side surface (cross-sectional portion) of the interior ceiling surface material 120 and at the left and right ends of the central portion 52a. It has end portions (contact portions) 52b and 52c that extend (vertically) to the lower side. The vertical width of the central portion 52a corresponds to the vertical width (thickness dimension) of the rear side surface (cross-sectional portion) of the interior ceiling surface material 120, and the lower end edge of the central portion 52a is on the vehicle interior (vehicle interior) side. It is designed so that it does not stick out.

A support portion 53 is connected to the lower end edges of the end portions 52b and 52c so as to be horizontal toward the front of the vehicle. The side surface contact portion 52 is connected to the rear end edge of the upper surface contact portion 51 so as to be perpendicular to the upper surface contact portion 51, and is connected to the lower end edges of the end portions 52b and 52c constituting the side surface contact portion 52. Since the support portion 53 is connected so as to be horizontal toward the front direction of the vehicle, the connected state of the upper surface contact portion 51, the side contact portion 52, and the support portion 53 has a U-shaped cross section when viewed from the side. It is composed of. The top surface contact portion 51, the side surface contact portion 52, and the support portion 53 may be integrally formed by one member.

The exciter 40 is placed on the support portion 53. The exciter 40 is installed so that the vibrating member 40a provided at the tip of the voice coil bobbin faces the front of the vehicle and the end of the frame on the opposite side abuts on the front side surfaces of the end portions 52b and 52c of the mounting bracket 50. .. Further, the portion of the mounting bracket 50 on the vehicle interior (vehicle compartment) side and the exciter 40 are covered with the speaker grill 60. The speaker grill 60 is a box body having an opening formed in the front surface (side surface on the front side of the vehicle). The front opening is formed to guide the high-mid range sound output from the vibrating member 40a of the exciter 40 into the room, and the opening is covered with a mesh material 60a that does not hinder the sound output.

In this way, when the exciter 40 is attached to the rear part of the ceiling surface material 120 for interior use via the attachment bracket 50 and an acoustic signal is input to the voice coil, the movable part is moved back and forth in the front-rear direction of the vehicle. , The vibrating member 40a provided in the opening on one end side of the voice coil bobbin vibrates, so that the high-mid range sound is output in the front direction of the vehicle. The listener in the car can enjoy the high-mid range sound by the sound output from the front of the exciter 40.

On the other hand, the acoustic vibration generated by the advancing and retreating of the movable portion is amplified via the damper and transmitted to the frame, and is transmitted to the end portions 52b and 52c of the mounting bracket 50 that abuts on the frame. The acoustic vibration transmitted to the end portions 52b and 52c is transmitted to the central portion 52a of the side contact portion 52 that is integrally formed. Here, the central portion 52a of the side surface contact portion 52 is in contact with the rear side surface (cross-sectional portion) of the interior ceiling surface material 120. Further, the acoustic vibration transmitted from the exciter 10 to the side contact portion 52 is a vibration that advances and retreats in the front-rear direction of the vehicle, and is therefore a longitudinal wave that travels in the front-rear direction. Therefore, the acoustic vibration transmitted to the central portion 52a of the side surface contact portion 52 is transmitted to the rear side surface (cross-sectional portion) of the interior ceiling surface material 120 that abuts on the central portion 52a, and is transmitted to the interior ceiling surface material 120. In, it becomes a longitudinal wave and is transmitted to the front direction of the vehicle.

In particular, as shown in FIG. 6B, since the central portion 52a of the side contact portion 52 is long in the left-right direction, it is transmitted from the exciter 40 to the central portion 52a via the end portions 52b and 52c. The acoustic vibrations of the longitudinal waves generated all at once while maintaining a constant width in the left-right direction of the ceiling surface material 120 for interior (long length of the central portion 52a) through the long contact surface in the central portion 52a. It is transmitted in the forward direction. The acoustic vibration of the longitudinal wave transmitted in this way is quickly transmitted to the entire interior ceiling surface material 120.

Further, the acoustic vibration of the longitudinal wave quickly transmitted to the entire surface of the interior ceiling surface material 120 causes the entire surface of the interior ceiling surface material 120 to vibrate to generate a low frequency sound for the inside of the vehicle. As described above, the interior ceiling surface material 120, which is an integrally formed surface material, is relatively easy to bend in the vertical direction (front and back directions). Therefore, when the acoustic vibration of the longitudinal wave quickly transmitted to the entire interior ceiling surface material 120 vibrates the entire surface of the interior ceiling surface material 120, the vertical direction of the interior ceiling surface material 120 is increased. Due to the bending of the ceiling surface material 120, a wide range of the ceiling surface material 120 for interior can be vibrated in the vertical direction.

In this way, when the interior ceiling surface material 120 vibrates in the vertical direction, the interior ceiling surface material 120 functions as a diaphragm of the exciter 40 to positively generate sound. Even when the interior ceiling surface material 120 serves as the diaphragm of the exciter 40, acoustic vibration, which is a longitudinal wave, is quickly transmitted to the entire interior ceiling surface material 120, and the entire surface of the interior ceiling surface material 120. Therefore, it is possible to suppress the delay of sound due to the portion of the ceiling surface material 120 for interior decoration. Therefore, it is possible to suppress the generation of unpleasant sound (sound quality) due to the delay of the low-frequency sound generated from the ceiling surface material, and it is possible to realize an excellent acoustic space without a sense of discomfort.

Further, since the entire surface of the interior ceiling surface material 120 can be vibrated without causing a delay in the transmission of the acoustic vibration, the acoustic vibration output from the exciter 40 is vibrated over a wide surface of the interior ceiling surface material 120. It is possible to enhance the acoustic effect of low-frequency sounds. Further, since the entire surface of the interior ceiling surface material 120 can be vibrated, for example, the low-frequency sound heard by a listener seated near the front seat in the vehicle and a listener seated near the rear seat. There is no delay. Therefore, it is possible to experience high-quality low-frequency sound regardless of the seating position of the listener.

When the upper surface of the interior ceiling surface material 120 is composed of a curved surface, the shape of the lower surface 51a of the upper surface contact portion 51 is set to a curved surface shape corresponding to the curved surface shape of the upper surface of the interior ceiling surface material 120. It is desirable to bring the 51a into contact with the interior ceiling surface material 120. By bringing the lower surface 51a of the upper surface contact portion 51 into contact with the upper surface of the interior ceiling surface material 120, the mounting bracket 50 can be attached to the interior ceiling surface material 120 in a reliable and stable state. Further, by attaching the mounting bracket 50 to the interior ceiling surface material 120 in a reliable and stable state, it is possible to reliably and stably transmit the acoustic vibration output from the exciter 40 to the interior ceiling surface material 120. Become.

Further, since the advancing / retreating direction of the movable portion of the exciter 40 is the front-rear direction of the vehicle, the vertical vibration direction generated in the vehicle during traveling is different from the advancing / retreating direction of the movable portion. Therefore, when there is no signal input to the voice coil of the exciter 40, it is possible to prevent the damper from passively vibrating due to the vibration of the vehicle, reduce the load on the damper, and improve the durability of the damper. It will be possible to maintain it for a long time.

In the mounting bracket 50 according to the third embodiment, the side contact portion 52 has a central portion 52a, and the central portion 52a abuts on the rear side surface (cross-sectional portion) of the ceiling surface material 120 for interior to cause acoustic vibration. A case where the sound is transmitted and the acoustic vibration composed of the longitudinal wave is transmitted to the front direction of the vehicle in the ceiling surface material 120 for the interior has been described. However, even when the side contact portion 52 of the mounting bracket 50 does not have the central portion 52a and is composed of only the end portions 52b and 52c, the acoustic vibration composed of longitudinal waves is generated by the interior ceiling surface material 120. It is possible to transmit to the front direction of the vehicle.

For example, the side contact portion 52 does not have the central portion 52a, and the end portions 52b, 52c of the side contact portion 52 are perpendicular to the upper surface contact portion 51 at the left and right rear end edges of the upper surface contact portion 51. It is assumed that the support portion 53 is connected to the lower end edges of the end portions 52b and 52c of the side contact portion 52 so as to be horizontal toward the front direction of the vehicle. In this case, only a part of the end portions 52b and 52c abuts on the rear side surface (cross-sectional portion) of the interior ceiling surface material 120, as compared with the case where the side contact portion 52 has the central portion 52a. The contact area becomes narrow.

However, the upper surface abutting portion 51 is connected to the upper end edges of the end portions 52b and 52c, and the upper surface abutting portion 51 is fixed by abutting the lower surface 51a on the upper surface of the interior ceiling surface material 120. There is. Therefore, the acoustic vibration generated by the moving part of the exciter 40 moving forward and backward is transmitted to the end portions 52b and 52c of the side contact portion 52 of the mounting bracket 50 that abuts on the frame, and the transmitted acoustic vibration is transmitted. , After being transmitted to the upper surface contact portion 51 connected to the end portions 52b and 52c, it is transmitted to the interior ceiling surface material 120 that is in contact with the upper surface contact portion 51. Since the acoustic vibration transmitted to the interior ceiling surface material 120 is a longitudinal wave, it is transmitted from the rear portion of the interior ceiling surface material 120 toward the front of the vehicle.

In this way, even when the side contact portion 52 does not have the central portion 52a, the acoustic vibration from the exciter 40 becomes a longitudinal wave through the upper surface contact portion 51 and becomes the ceiling surface material 120 for the interior. It is possible to transmit and vibrate the entire interior ceiling surface material 120. Therefore, it is possible to suppress the delay of sound due to the portion of the ceiling surface material 120 for interior. Further, it is possible to suppress unpleasant sound quality due to a delay in low-frequency sound output from the ceiling surface material, and it is possible to realize an excellent acoustic space without a sense of discomfort.

[Embodiment 4]
FIG. 8 is a view showing a vehicle door on the right side provided with the acoustic output device according to the fourth embodiment, (a) is a front view showing a state of being visually recognized from the inside of the vehicle, and (b) is a front view. It is a horizontal cross-sectional view which showed the AA cross section of (a), and (c) is a vertical sectional view which showed the BB cross section of (a). The acoustic output device 1d according to the fourth embodiment is not installed on the ceiling surface material 120 for interior use, but is provided on the door trim of the vehicle door. It is different from 1b and 1c.

The vehicle door 200 includes an exterior side material (outer panel) 210 that constitutes the outer surface of the vehicle door 200, an internal reinforcing surface material (inner panel) 220 that constitutes the inside of the vehicle door, and a side surface inside the vehicle. It has a door trim (lining surface material, interior surface material) 230 that constitutes the structure. The internal reinforcing surface material 220 constitutes the skeleton of the vehicle door 200, and a window frame is formed on the upper portion thereof. The window glass 240 that moves up and down along the window frame is housed between the exterior side surface material 210 and the internal reinforcing surface material 220. The exterior side surface material 210 and the internal reinforcing surface material 220 are made of a high-strength material such as an iron plate.

The door trim 230 is attached to the internal reinforcing surface material 220. The door trim 230 is a resin molded product, and is an interior material that covers the inner side surface of the internal reinforcing surface material 220. Door armrests, door pull handles, etc. are integrally formed as needed. Since the user may use it as an elbow rest when the vehicle is running, the door trim 230 is made of an elastic material, and leather or cloth is applied to the surface as needed.

The door trim 230 has a shape in which the central portion slightly bulges inward of the vehicle as compared with the upper, lower, left and right ends. When the door trim 230 is attached to the inner side surface of the internal reinforcing surface material 220, a space is secured between the back surface of the door trim 230 and the side surface of the internal reinforcing surface material 220. The acoustic output device 1d is installed on the back surface of the door trim 230 by utilizing the space between the door trim 230 and the internal reinforcing surface material 220.

The acoustic output device 1d according to the fourth embodiment has an exciter (acoustic vibration output unit) 70 and a mounting bracket (mounting unit) 80. The exciter 70 has the same structure as the exciter 10 described in the first embodiment, and is adjusted in size so as to fit in the space between the door trim 230 and the internal reinforcing surface member 220. Therefore, a detailed description of the exciter 70 according to the fourth embodiment will be omitted.

The mounting bracket 80 has a door trim contact portion (fixing portion) 81 that contacts the back surface of the door trim 230, and an exciter contact portion (contact portion) 82 that contacts the frame of the exciter 70. The door trim contact portion 81 is a long rectangular member, and one surface (hereinafter referred to as a contact surface) 81a is the back surface of the door trim 230 in a state where the long direction is directed to the vertical direction of the vehicle door 200. It is fixed in contact with the door. The exciter contact portion 82 has a rectangular shape having a size corresponding to the frame surface of the exciter 70, and the left end edge of the exciter contact portion 82 is the central portion of the door trim contact portion 81 in the long direction and is a vehicle. It is connected to the rear edge. The exciter contact portion 82 is perpendicular to the door trim contact portion 81, and as shown in FIG. 8B, the door trim contact portion 81 and the exciter contact portion 82 in the horizontal cross section of the vehicle door 200. The cross section with 82 is L-shaped. The door trim contact portion 81 and the exciter contact portion 82 may be integrally formed by one member.

The exciter 70 is a state in which the outer surface of the frame is in contact with the back surface (rear side surface of the vehicle) of the exciter contact portion 82, and the moving portion is moved forward and backward in the front-rear direction of the vehicle so that the back surface of the door trim 230 is in contact with the back surface of the door trim 230. Is fixed to. In this way, when an acoustic signal is input to the voice coil with the exciter 70 and the mounting bracket 80 mounted on the door trim 230, the movable portion is moved forward and backward in the vehicle. The acoustic vibration generated by the advancing and retreating of the movable portion is amplified via the damper and transmitted to the frame, and is transmitted to the exciter contact portion 82 that abuts on the front surface of the frame. The acoustic vibration transmitted from the exciter 70 to the exciter contact portion 82 is a vibration that advances and retreats in the front-rear direction of the vehicle. The acoustic vibration transmitted to the exciter contact portion 82 is transmitted to the door trim contact portion 81 connected to the left end edge of the exciter contact portion 82, and the transmitted acoustic vibration is the contact of the door trim contact portion 81. It is transmitted to the door trim 230 that abuts on the surface 81a. Since the acoustic vibration transmitted to the door trim 230 is a longitudinal wave, the acoustic vibration is quickly transmitted to the entire door trim 230.

In particular, as shown in FIGS. 8A and 8B, since the door trim contact portion 81 is long in the vertical direction, the acoustic vibration of the longitudinal wave transmitted from the exciter 70 to the mounting bracket 80 is applied to the door trim. Through the long contact surface 81a on the contact portion 81, the door trim 230 is simultaneously transmitted in the front-rear direction of the vehicle while maintaining a constant width in the vertical direction (at least the long length of the door trim contact portion 81). .. The acoustic vibration of the longitudinal wave transmitted to the door trim 230 through the contact surface 81a of the vertically long door trim contact portion 81 is quickly transmitted to the entire door trim 230.

Further, the acoustic vibration of the longitudinal wave quickly transmitted to the entire surface of the door trim 230 causes the entire surface of the door trim 230 to vibrate to generate a low frequency sound toward the inside of the vehicle. As described above, the door trim 230 is a resin molded product integrally formed and has a shape that covers the inside of the vehicle of the internal reinforcing surface material 220, so that the door trim 230 tends to bend easily in the vehicle interior direction. Therefore, when the acoustic vibration of the longitudinal wave quickly transmitted to the entire door trim 230 vibrates the entire side surface of the door trim 230, the wide surface of the door trim 230 is vibrated by the bending of the door trim 230 toward the vehicle interior. Will be possible.

In this way, when the door trim 230 vibrates in the vehicle interior direction, the door trim 230 functions as a diaphragm (vibrated body) of the exciter 70 and positively generates sound. Even when the door trim 230 functions in this way, the acoustic vibration consisting of longitudinal waves is quickly transmitted to the entire door trim 230 to vibrate the entire surface of the door trim 230, so that it depends on the part of the door trim 230. Sound delay can be suppressed. Therefore, it is possible to suppress the generation of unpleasant sound quality due to sound delay or the like, and it is possible to realize an excellent acoustic space without a sense of discomfort.

Further, since the moving direction of the movable portion of the exciter 70 is the front-rear direction of the vehicle, the vertical vibration direction generated in the vehicle during traveling is different from the moving direction of the moving portion. Therefore, when there is no signal input in the voice coil of the exciter 70, it is possible to prevent the damper from passively vibrating due to the vibration of the vehicle, reduce the load on the damper, and improve the durability of the damper. It will be possible to maintain it for a long time.

In the acoustic output device 1d shown in FIGS. 8A to 8C, the case where the acoustic output device 1d is installed on the right vehicle door 200 has been described, but the acoustic output device 1d is installed on the left vehicle door 200. Even when 1d is installed, the same effect can be obtained by installing it in the same manner.

Further, in the acoustic output device 1d according to the fourth embodiment, the case where the edge of the exciter contact portion 82 is connected to the edge of the door trim contact portion 81 on the rear side of the vehicle has been described. However, the location where the edge of the exciter contact portion 82 is connected is not limited to the edge of the door trim contact portion 81 on the rear side of the vehicle, and may be the end edge on the front side of the vehicle. Further, in the acoustic output device 1d according to the fourth embodiment, the case where the edge of the exciter contact portion 82 is connected to the edge of the central portion of the door trim contact portion 81 in the long direction has been described. However, the place where the edge of the exciter contact portion 82 is connected is not limited to the edge of the central portion of the door trim contact portion 81 in the long direction, and the edge of the right side portion or the left side portion in the long direction. It may be.

Further, in the acoustic output device 1d according to the fourth embodiment, the case where the outer surface of the frame of the exciter 70 is in contact with the back surface (rear side surface of the vehicle) of the exciter contact portion 82 has been described. The outer surface may be provided so as to abut on the surface (front side surface of the vehicle) of the exciter contact portion 82.

When the back surface of the door trim 230 is formed of a curved surface, the contact surface 81a of the door trim contact portion 81 has a curved surface shape corresponding to the curved surface shape of the back surface of the door trim 230, and the contact surface 81a corresponds to the door trim 230. It is desirable to bring them in contact. By bringing the contact surface 81a into contact with the back surface of the door trim 230, the mounting bracket 80 can be attached to the door trim 230 in a reliable and stable state. Further, by attaching the mounting bracket 80 to the door trim 230 in a reliable and stable state, it is possible to reliably and stably transmit the acoustic vibration output from the exciter 70 to the door trim 230.

[Embodiment 5]
9 (a) and 9 (b) are side views showing a state in which the acoustic output device 1e according to the fifth embodiment is installed on the ceiling surface material 121 for the interior of the vehicle, and FIG. 9 (b) is a side view showing a state in which the acoustic output device 1e according to the fifth embodiment is installed from the rear of the vehicle. It is a rear view which showed the state which the front was visually recognized. The acoustic output device 1e according to the fifth embodiment includes an exciter 10 and a mounting bracket 30 as in the acoustic output device 1b according to the second embodiment.

Further, as shown in FIGS. 9A and 9B, the acoustic output device 1e according to the fifth embodiment includes a vibration transmission surface material 90 in addition to the exciter 10 and the mounting bracket 30. In the acoustic output device 1e according to the fifth embodiment, the same reference numerals are given to the parts common to the acoustic output device 1b according to the second embodiment, and the description thereof will be omitted here.

In the acoustic output device 1e, acoustic vibration is generated by moving the movable portion 11 of the exciter 10 in the front-rear direction of the vehicle, and the generated acoustic vibration is transmitted from the exciter 10 to the side contact portion 31, and further. It is transmitted from the side surface contact portion 31 to the top surface contact portion 32. Then, the acoustic vibration transmitted to the upper surface contact portion 32 is transmitted to the interior ceiling surface material 121 that abuts on the upper surface contact portion 32, and the acoustic vibration is outward from the vicinity of the central portion of the interior ceiling surface material 121. Will be transmitted.

Here, an interior ceiling surface material having a lower strength than the conventional one may be used for the ceiling surface of the vehicle. For example, the area of the ceiling surface of a light vehicle or a small vehicle is smaller than the area of the ceiling surface of a medium-sized or large vehicle or a station wagon / one-box vehicle. Therefore, as shown in FIGS. 9A and 9B, the wall thickness L of the interior ceiling surface material 121 corresponding to the ceiling surface of a light vehicle or the like is changed to the wall thickness of the interior ceiling surface material for a medium-sized or large vehicle or the like. The strength of the ceiling surface material is lowered by making it thinner than the thickness (for example, the wall thickness of the interior ceiling surface material 120 shown in FIG. 5) or changing the material. Even if the strength of the ceiling surface material for interior is lowered in this way, sufficient strength can be secured in the case of a light vehicle or the like, and the original function as the ceiling surface material for interior can be realized. be.

On the other hand, when the exciter 10 and the mounting bracket 30 are attached to the interior ceiling surface material 121 having low strength to generate acoustic vibration, the acoustic vibration transmitted from the mounting bracket 30 to the interior ceiling surface material 121 is generated in the interior. It may be absorbed by the ceiling surface material 121. In this case, it becomes difficult to transmit acoustic vibration to the entire interior ceiling surface material 121 (entire surface), and it is possible to provide the listener with an excellent acoustic environment using the interior ceiling surface material 121. It will not be easy.

Therefore, in the acoustic output device 1e, the vibration transmission surface material 90 is installed between the mounting bracket 30 and the interior ceiling surface material 121. The vibration transmission surface material 90 has a flat plate shape, and the area of the flat surface portion of the vibration transmission surface material 90 is based on the area of the contact portion between the lower surface 32a of the upper surface contact portion 32 and the ceiling surface material 121 for interior. It is also wider than the area of the contact portion between the lower side surface of the frame 12 of the exciter 10 and the ceiling surface material 121 for interior.

Further, the vibration transmission surface material 90 has a vibration transmission performance capable of transmitting the acoustic vibration transmitted to the mounting bracket 30 to the interior ceiling surface material 121, and allows the interior ceiling surface material 121 to bend. It is molded from a material that has elastic deformation performance. For example, as the vibration transmission surface material 90, a resin material formed in the shape of a flat plate material is used. By using the resin material as the vibration transmissible surface material 90, it is possible to produce a surface material having a constant vibration transmissibility performance, a constant elastic deformation performance, and further light weight.

By installing the vibration transmission surface material 90 configured in this way between the ceiling surface material 121 for interior decoration and the mounting bracket 30 and the exciter 10, the acoustic vibration transmitted from the exciter 10 to the mounting bracket 30. Can be transmitted to a wide surface range of the interior ceiling surface material 121 while transmitting the vibration in the direction in which the surface portion of the interior ceiling surface material 121 spreads (outward direction) via the vibration transmission surface material 90. Become. Therefore, even when the strength of the interior ceiling surface material 121 is lower than that of a general interior ceiling surface material, the entire interior ceiling surface material 121 can be vibrated and acoustic vibration is generated. , It is possible to prevent the ceiling surface material 121 for interior from being absorbed.

Further, by changing the material, thickness, and width of the surface portion of the vibration transmission surface material 90, the quality of acoustic vibration (sound quality, etc.) transmitted to the ceiling surface material 121 for interior through the vibration transmission surface material 90 can be improved. Including) can be adjusted. Therefore, it is possible to adjust the low-frequency sound experienced by the listener to a more extended bass sound or to change the bass sound to a tighter bass sound.

[Embodiment 6]
FIG. 10A is a side view showing a state in which the acoustic output device 1f according to the sixth embodiment is installed on the ceiling surface material 122 for the interior of the vehicle, and FIG. 10B is a side view showing the front side from the rear of the vehicle. It is a rear view which showed the state which was done.

The acoustic output device 1f according to the sixth embodiment includes an exciter 10 and a mounting bracket 30 as in the acoustic output device 1b according to the second embodiment. However, in the mounting bracket 30 of the acoustic output device 1f according to the sixth embodiment, the length of the upper surface contact portion in the vehicle front-rear direction is longer than the length of the upper surface contact portion 32 of the acoustic output device 1b in the vehicle front-rear direction. It differs in that. In the acoustic output device 1f according to the fifth embodiment, the reference numeral 33 is attached to the upper surface contact portion of the mounting bracket 30, which is referred to as the “upper surface contact portion 33”. The configurations of the acoustic output device 1f other than the top surface contact portion 33 are the same as those of the acoustic output device 1b according to the second embodiment, and thus the same reference numerals are given and the description thereof will be omitted here.

In the acoustic output device 1f, as shown in FIGS. 10A and 10B, the upper surface contact portion 33 of the mounting bracket 30 is extended in the vehicle front-rear direction, and the lower surface 33a of the upper surface contact portion 33 and the interior are used. The contact area with the upper surface of the ceiling surface material 122 is wide. Therefore, the acoustic signal transmitted from the exciter 10 to the mounting bracket 30 can be transmitted to a wide range of the interior ceiling surface material 120 via the lower surface 33a of the upper surface contact portion 33. Therefore, it is possible to positively vibrate a large area of the interior ceiling surface material 122, and it is possible to provide a dynamic acoustic environment to the listener.

Further, by adjusting the thickness and material (for example, metal material) of the upper surface contact portion 33 of the mounting bracket 30, it is possible to finely adjust the vibration (surface wave) generated on the surface of the upper surface contact portion 33. It is possible. By finely adjusting the surface wave of the upper surface contact portion 33 in this way, it becomes possible to output mid-high range sound (fine vibration, sound based on the surface wave) via the upper surface contact portion 33.

However, if the mounting bracket 30 is installed in a state of being in contact with the interior ceiling surface material, even if the mid-high range sound is output from the upper surface contact portion 33 of the mounting bracket 30, the interior ceiling surface material is medium-high. The range sound is cut off and cannot be transmitted to the listener in the passenger compartment.

Therefore, in the acoustic output device 1f according to the sixth embodiment, as shown in FIGS. 10A and 10B, with respect to the portion of the interior ceiling surface material 122 that abuts on the upper surface abutting portion 33 of the mounting bracket 30. , A plurality of communication holes 95 communicating from the lower surface 33a of the upper surface contact portion 33 to the inside of the vehicle interior are formed. The communication hole 95 may be formed at least in a portion of the interior ceiling surface material 122 where the upper surface contact portion 33 abuts. Further, the shape and size of the communication hole 95 are not particularly limited. For example, as shown in FIGS. 10A and 10B, a plurality of circular holes may be formed in the ceiling surface material 122 for interior as the communication holes 95, or a plurality of slit-shaped holes may be formed as the communication holes 95. It is also possible to form a rectangular hole in the interior ceiling surface material 122.

By forming the communication hole 95 in the ceiling surface material 122 for interior, the fine vibration transmitted to the lower surface 33a of the upper surface contact portion 33 is output as a mid-high range sound, and the fine vibration is output as a mid-high range sound through the communication hole 95. It is possible to transmit high-quality mid-high range sound to the passenger compartment. Therefore, the listener not only feels (listens to) the low-frequency sound output by vibrating the entire ceiling surface of the interior ceiling surface material 122, but also experiences the mid-high range sound transmitted through the communication hole 95. It becomes possible to (listen).

As described above, the acoustic output device according to the embodiment of the present invention has been described in detail by exemplifying the acoustic output devices 1a to 1f according to the first to sixth embodiments. However, the acoustic output device according to the embodiment of the present invention is not limited to the examples described in the first to sixth embodiments. A person skilled in the art can use various modifications or modifications within the scope of the claims.

In the first to sixth embodiments, the case where the acoustic output device is installed on the interior ceiling surface materials 120, 121, 122 or the door trim 230 has been described. However, the location where the acoustic output device is installed is not limited to the interior ceiling surface materials 120, 121, 122 and the door trim 230. By attaching an acoustic output device to interior members such as various trims used in the vehicle, the acoustic vibration output from the exciter is transmitted to the interior member, and the interior member is used as a vibrating member (vibrated body). It can be used.

For example, even when the acoustic output device is installed on the in-vehicle trim of the rear door in a one-box vehicle or a hatchback vehicle, the in-vehicle trim can be vibrated to generate a low frequency sound. In particular, since the acoustic vibration generated by the moving part of the exciter moving forward and backward is a longitudinal wave, the acoustic vibration is quickly transmitted to the entire trim for the vehicle, causing a delay for each part of the trim for the vehicle. It is possible to generate low-frequency sound throughout the trim for the interior of the vehicle. Therefore, it is possible to suppress the occurrence of a delay or the like for each part in the low-frequency sound generated by the vibration of the trim for the vehicle interior, and it is possible to prevent the generation of an unpleasant sound (sound quality). Therefore, it is possible to realize an excellent acoustic space in the vehicle without a sense of discomfort. Furthermore, since the moving direction of the moving part of the exciter is different from the vertical vibration direction generated in the vehicle during traveling, the load on the damper due to the vibration of the vehicle can be reduced, and the durability of the damper is extended. It will be possible to maintain.

1a, 1b, 1c, 1d, 1e, 1f ... Acoustic output device 10,40,70 ... Exciter (acoustic vibration output unit)
11 ... (exciter's) moving part 12 ... (exciter's) frame 12a ... (frame's) front outer surface 13 ... (exciter's) first yoke 14 ... (exciter's) disk-shaped magnet 15 ... (exciter's) second yoke 16 ... Inner surface (of 1st yoke) 17 ... (Exciter) Damper 18 ... (Exciter) Voice coil bobbin 18a ... (Voice coil bobbin) one end 18b ... (Voice coil bobbin) other end 19 ... (Exciter) Voice coil 20,30,50,80 ... Mounting bracket (mounting part)
21,32,33,51 ... Top contact part (fixing part) (of mounting bracket)
21a, 32a, 33a, 51a ... Lower surface (contact surface) (of the upper surface contact portion)
22,31,52 ... Side contact part (contact part) (of mounting bracket)
23,53 ... Support (fixing part) (of mounting bracket)
24 ... Frame contact part (contact part) (of mounting bracket)
40a ... (exciter's) vibrating member 52a ... (side contact part) central part (contact part)
52b, 52c ... End portion (contact portion) (contact portion)
60 ... Speaker grill 60a ... Mesh material 81 ... Door trim contact part (fixed part) (of mounting bracket)
81a ... Contact surface (of door trim contact) 82 ... Exciter contact (contact) (of mounting bracket)
90 ... Vibration transmission surface material 95 ... Communication hole 100 ... Ceiling 110 ... (Ceiling) exterior ceiling surface material 120,121,122 ... (Ceiling) Interior ceiling surface material (interior surface material)
120a ... Notch 200 (of interior ceiling surface material) ... Vehicle door 210 ... Exterior side material 220 ... (Vehicle door) Internal reinforcement surface material 230 ... (Vehicle door) Door trim (interior surface material)
240 ... Window glass L (for vehicle doors) ... Thickness (for interior ceiling surface material)

Claims (6)

An acoustic vibration output unit that outputs acoustic vibration by moving the moving part forward and backward,
The acoustic vibration output unit is provided with an attachment unit for attaching to the interior surface material for the passenger compartment.
The mounting part is
A contact portion that abuts on any end of the movable portion on the advancing / retreating direction side of the acoustic vibration output portion, and
The acoustic vibration output unit is set so that the direction in which the surface portion of the interior surface material expands and the advancing / retreating direction of the movable portion are in the same direction and the advancing / retreating direction is in a direction different from the gravity direction. It has a fixing part to be fixed to the interior surface material,
An acoustic output device characterized in that the abutting portion and the fixing portion are connected or integrally formed. The acoustic output device according to claim 1, wherein the contact portion also contacts a cross section of the interior surface material. The acoustic output device according to claim 1 or 2, wherein the fixing portion has a contact surface that comes into contact with the surface portion of the interior surface material. The acoustic output device according to claim 3, wherein the contact surface is a long surface extending in a direction orthogonal to the advancing / retreating direction. The acoustic output according to claim 3, wherein the interior surface material to which the fixed portion is in contact is provided with a communication hole that communicates from the contact surface of the fixed portion to the inside of the vehicle interior. Device. The acoustic output device according to claim 1, wherein a vibration transmitting surface material is provided between the mounting portion and the interior surface material.

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