WO2020080311A1

WO2020080311A1 - Acoustic output device

Info

Publication number: WO2020080311A1
Application number: PCT/JP2019/040298
Authority: WO
Inventors: 賢司河野; 真悟竹井
Original assignee: クラリオン株式会社
Priority date: 2018-10-15
Filing date: 2019-10-11
Publication date: 2020-04-23
Also published as: JPWO2020080311A1

Abstract

An acoustic output device (1a) according to the present invention comprises: an acoustic vibration output part (10) for outputting acoustic vibrations by advancing and retracting a movable part; and a mounting part (20) for mounting the acoustic vibration output part (10) onto an interior planar member (120). The mounting part (20) comprises: abutting parts (22, 24) that abut one end, of the acoustic vibration output part (10), in the advancement-retraction direction thereof; and anchoring parts (21, 23) for anchoring the acoustic vibration output part (10) to the interior planar member (120) so that the direction in which a planar portion of the interior planar member (120) expands is the same direction as the advancement-retraction direction, and so that the advancement-retraction direction is different from the direction of gravity. The abutting parts (22, 24) and the anchoring parts (21, 23) are linked or integrally formed.

Description

Sound output device

The present invention relates to an audio output device. More specifically, the present invention relates to an acoustic output device that includes an acoustic vibration output unit that outputs acoustic vibration in the moving direction by moving the moving unit back and forth.

Exciter is known as an acoustic vibration output unit that effectively generates low-range sounds (heavy bass). In the exciter, a movable part including a yoke and a magnet is attached to the frame via a damper so as to be movable back and forth. A voice coil is attached to the frame via a boil coil bobbin. The movable part is moved back and forth according to the acoustic signal input to the voice coil, and the vibration accompanying the forward and backward movement 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 is in contact with the frame, and the low frequency range is transmitted. The structure is such that sound is generated.

▽ By positively outputting low-range sounds in the room, it is possible to enhance the acoustic effect in the room. For example, in the passenger compartment, a method of effectively outputting a low frequency sound using a subwoofer or the like is used. Nowadays, as a method to effectively increase the distance from the low-frequency speaker to the listener, the sound field balance in the passenger compartment, the sound image localization, etc., the ceiling is used as a diaphragm to output low-frequency sounds. Has been devised (see, for example, Patent Document 1). When the ceiling is used as the diaphragm, the exciter described above is used as an example of the acoustic vibration output unit.

Japanese Utility Model Publication No. 6-45865 (FIGS. 1 and 2)

In the acoustic processing device described in Patent Document 1, the exciter is attached to the central portion of the ceiling surface, and the vibration output along with the vertical movement of the movable portion is transmitted to the ceiling surface and is transmitted 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 mounted so as to be movable up and down via the damper, the movable direction of the movable part of the exciter (vertical direction) 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 to the voice coil of the exciter, the damper tends to passively vibrate 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 possible 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 movable part of the exciter as much as possible. However, if the amplitude is suppressed, there is a problem in that it is difficult to reproduce sufficient deep bass, which is the original purpose.

Also, when the exciter is mounted on the ceiling surface, the vibration generated by the exciter tends to spread like ripples around the mounting position of the exciter in the outer peripheral direction of the ceiling surface. As the distance from the exciter mounting position increases, a time difference occurs in the timing of vibration transmitted through the ceiling surface. Therefore, the low-frequency sound output through the ceiling surface is generated at different timings for each part of the ceiling surface, and the same sound may be heard with a delay, so that the listener hears the low-frequency sound as an unpleasant sound ( There was a risk that the sound quality would be felt.

In order to reduce the delay of low frequency sound, it is desirable to install an exciter above the listener's overhead position.For example, if an exciter is installed near the overhead of the front seat in the vehicle, low frequency sound near the rear seats If a delay occurs, and an exciter is attached near the overhead of the rear seat in the vehicle, a low-frequency sound delay occurs near the front seat.

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, an acoustic output device according to an aspect of the present invention includes an acoustic vibration output unit that outputs acoustic vibration by moving a movable part forward and backward, and the acoustic vibration output unit for a vehicle interior. An attachment portion for attaching to an interior surface material, the attachment portion contacting any one end of the movable portion of the acoustic vibration output portion on the advancing and retracting direction side, and the interior surface material. Of the acoustic vibration output portion to the interior surface material such that the direction in which the surface portion of the movable portion expands and the direction in which the movable portion advances and retracts are the same, and the direction in which the movable portion moves is different from the direction of gravity. It has a fixed part which fixes, and the abutting part and the fixed part are connected or formed in one.

In the sound output device of the above aspect, since the contact portion of the mounting portion is in contact with either end of the movable portion of the acoustic vibration output portion on the advancing / retreating direction side, it is output 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 is transmitted to the interior surface material. . The fixing portion is such that the abutment portion and the fixing portion are fixed in order to fix the acoustic vibration output portion to the interior surface material by making the direction in which the surface portion of the interior surface material expands and the moving direction of the movable portion 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 spreads.

In general, the time for longitudinal waves to propagate in the direction in which the surface part of the surface member spreads is shorter than the time for transverse waves to propagate, so acoustic vibrations consisting of longitudinal waves are 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 in the front and back directions and vibrates to generate sound. Therefore, in the acoustic output device according to the present invention, the interior surface material functions as a vibrating member for converting acoustic vibration into sound, and it is possible to generate sound of acoustic vibration from the entire surface of the interior surface material. Become.

Furthermore, since 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 acoustic vibration that may occur depending on the location of the interior surface material. Therefore, when the acoustic vibration is generated as a sound from the entire surface of the interior surface material, it is possible to suppress the generation of an unpleasant sound (sound quality) that may occur due to the delay of the acoustic vibration, etc. It is possible to realize a sound space that is excellent.

Further, since the acoustic vibration output unit is fixed to the interior surface material so that the moving direction of the movable section is different from the gravity direction, the moving direction of the movable section can be generated inside the vehicle during traveling. The direction of vibration can be different from the vertical vibration direction. Therefore, it is possible to reduce the load on the mounting portion (for example, a damper, a spring, etc.) of the movable portion that 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. .

In the sound output device of the above aspect, the contact portion may contact the cross section of the interior surface material.

The contact part of the attachment part is in contact with either end of the movable part of the acoustic vibration output part on the advancing / retreating direction side, so that the acoustic vibration is transmitted to the contact part as a longitudinal wave. Further, when the abutting portion also abuts on the cross section of the interior surface material, the longitudinal wave transmitted to the abutment 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 expands. Transmitted to. Therefore, it becomes 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 more quickly to the entire interior surface material, and the vibration delay of the acoustic vibration that may occur depending on the site of the interior surface material can be more effectively suppressed. Further, 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 of acoustic vibration, etc. It becomes possible to realize an acoustic space.

Furthermore, in the sound output device of the above aspect, the fixing portion may have a contact surface that contacts the surface portion of the interior surface material.

In the acoustic output device of the above aspect, acoustic vibration of a longitudinal wave is transmitted to the fixing portion via a contact portion that is connected or integrally formed, and the acoustic vibration transmitted to the fixing portion is transferred to the interior surface material. Transmitted. When the fixed portion has a contact surface that comes into contact with the surface portion of the interior surface material, acoustic vibrations are transmitted to the interior surface material through the contact surface of the fixed portion, so the momentum of longitudinal waves is less likely to weaken. Therefore, it becomes possible to more effectively transmit the acoustic vibration composed of the longitudinal wave to the interior surface material.

In the sound 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 the contact surface that comes into contact with the surface portion of the interior surface material, longitudinal acoustic waves are transmitted to the interior surface material via the contact surface of the fixed portion. Here, since the acoustic vibration is a longitudinal wave in the advancing / retreating direction of the movable part, it means that the interior surface material is quickly transmitted in the advancing / retreating direction, but is not transmitted in the direction orthogonal to the advancing / retreating direction. May be late. In particular, since the interior surface material for the interior of a vehicle is also a portion that the user's hand touches, there is a high tendency to use a soft material instead of a hard material. Therefore, by providing an abutting surface made of a long surface extending in the direction orthogonal to the advancing / retreating direction in the fixed portion of the mounting portion, the acoustic vibration is transmitted to the fixed portion in the long direction when the vibration is transmitted. With the longitudinal wave expanded, acoustic vibration can be transmitted to the interior surface material. Therefore, it is possible to simultaneously transmit the acoustic vibration consisting of the longitudinal wave of the contact surface to the interior surface material, and to quickly transmit the acoustic vibration to the entire interior surface material.

Further, in the sound output device according to the above aspect, the interior surface material with which the fixing portion is in contact is provided with a communication hole that communicates from the contact surface of the fixing portion into the interior of the vehicle compartment. Good.

In the sound output device of the above aspect, the interior surface material with 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 vibration for the mid-high range occurs on the abutment surface of the fixed portion, it is possible to transmit high-quality mid-high range sound into the passenger compartment through the communication hole provided in the interior surface material. become. Therefore, it is possible for the listener in the vehicle compartment to not only experience the low frequency sound output by vibrating the interior surface material, but also the middle and high frequency sound transmitted through the communication hole.

Further, the sound 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 the vibration transmitting surface material between the mounting portion and the interior surface material, the acoustic vibration output from the acoustic vibration output portion and transmitted to the mounting portion is transmitted by vibration. It is possible to transmit to a wide range of the interior surface material through the surface 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, since the contact portion of the mounting portion is in contact with either end of the movable portion of the acoustic vibration output portion on the advancing / retreating direction side, the advancing / retreating of the movable portion is performed. The acoustic vibration output by the movement 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 composed of the longitudinal wave transmitted to the contact portion is transmitted from the contact portion to the fixed portion and is transmitted to the interior surface material. It

The fixing portion is such that the abutment portion and the fixing portion are fixed in order to fix the acoustic vibration output portion to the interior surface material by making the direction in which the surface portion of the interior surface material expands and the moving direction of the movable portion 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 spreads. 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 site of the interior surface material. Therefore, when the acoustic vibration is generated as a sound from the entire surface of the interior surface material, it is possible to suppress the generation of an unpleasant sound (sound quality) that may occur due to the delay of the acoustic vibration, etc. It is possible to realize a sound space that is excellent.

(A) is a side sectional view showing a state in which the sound output device according to the first embodiment is installed on an interior ceiling surface material, and (b) is a rear view shown from the rear of the vehicle. FIG. 1A is an enlarged view of the acoustic output device shown in FIG. 1A, and FIG. 1B is a rear view showing the acoustic output device installed on an interior ceiling surface material composed of a curved surface. is there. FIG. 3 is a perspective view showing the sound output device according to the first embodiment. FIG. 3 is a developed perspective view showing the sound output device according to the first embodiment. (A) is a side sectional view showing a state in which the sound output device according to the second embodiment is installed on an interior ceiling surface material, 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 sound output device according to the third embodiment is installed on an interior ceiling surface material, and (b) is a rear view shown from the rear of the vehicle. FIG. 11 is a perspective view showing a mounting bracket of the sound output device according to the third embodiment. (A) is a front view seen from the inside of the vehicle showing a state where the sound output device according to the fourth embodiment is installed in a vehicle door, and (b) is a sectional view taken along line AA of (a). FIG. 3C is a horizontal cross-sectional view of FIG. 3C, and FIG. (A) is a side sectional view showing a state in which the sound output device according to the fifth embodiment is installed on an interior ceiling surface material, 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 sound output device according to the sixth embodiment is installed on an interior ceiling surface material, and (b) shows a state in which the front side is visually recognized from the vehicle rear side. FIG.

The audio output device according to the embodiment of the present invention will be described below in detail with reference to some examples.

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

The ceiling 100 of the vehicle shown in FIG. 1A includes an exterior ceiling surface material (roof outer plate) 110 that constitutes the outside ceiling of the vehicle and an interior ceiling surface material that constitutes the inside of the vehicle (cabin). (Roof trim, interior surface material) 120 and a frame member (not shown) for reinforcing the exterior ceiling surface material 110 are roughly configured.

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

The interior ceiling panel 120 is often formed of an elastic material having a lower strength than the exterior ceiling panel 110. The interior ceiling surface material 120 suppresses noise and vibration outside the vehicle from entering the interior of the vehicle through the exterior ceiling surface material 110, and also serves to secure heat retention and moisture retention inside the vehicle and improve 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 left end portion to the right end portion of the ceiling portion 100, and further covers the front end portion to the rear end portion. Further, since the interior ceiling surface material 120 is formed of an elastic material such as urethane material, vibration tends to occur in the vertical direction (front-back direction) rather than the front-back, left-right direction.

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

The exciter 10 is roughly composed of a movable portion 11 and a frame 12, as shown in FIG. The movable part 11 includes a first yoke 13 having a bottomed tubular shape, a disk-shaped magnet 14 stacked in the inner center of the first yoke 13, and a disk-shaped second yoke 15 stacked 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 side surface 16 of the first yoke 13 and the outer side surfaces of the disk-shaped magnet 14 and the second yoke 15 facing the inner side surface 16.

The frame 12 has a bottomed cylindrical shape having an inner diameter wider than the outer shape of the first yoke 13. A damper 17 is provided at the opening edge of the bottomed tubular shape. The movable part 11 can be moved back and forth to the frame 12 via the damper 17 in a state where the open cylinder end of the first yoke 13 faces the bottomed part of the frame 12 and half of the body is inserted into the frame 12. Attached to.

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

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

The mounting bracket 20 functions as a mounting portion for mounting the exciter 10 on the interior ceiling panel 120. The mounting bracket 20 includes an upper surface abutting portion (fixing portion) 21 that abuts an upper surface of the interior ceiling surface material 120 and a side surface abutting portion (abutting portion) that abuts a rear side surface (cross-section portion) of the interior ceiling surface material 120. Part) 22 and a support part (fixed part) 23 that supports the exciter 10 from below and that functions as a decorative member on the rear part of the interior ceiling panel 120 so that the exciter 10 cannot be seen from the inside of the vehicle. It is configured. Each of the upper surface abutting portion 21, the side surface abutting portion 22, and the support portion 23 is a plate member having a common longitudinal dimension. As shown in FIG. 1 (b), FIG. 3 and FIG. 4, the mounting bracket 20 is arranged so that the longitudinal direction of the upper surface abutting portion 21, the side surface abutting portion 22 and the supporting portion 23 is the left-right direction of the vehicle. And is attached to the interior ceiling surface material 120.

The end of the support part 23 is connected to the lowermost part of the standing side surface contact part 22, and the support part 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. In addition, at the center portion of the upper surface abutting portion 21 with respect to the longitudinal direction, a frame abutting portion (abutting portion) that abuts the frame 12 of the exciter 10 by standing up so as to be flush with the rear side surface of the side surface abutting portion 22. A contact portion 24 is provided (connected). The upper 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 such that the front side outer surface 12a of the frame 12 contacts the standing side surface 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 contacts the frame contact portion 24, the exciter 10 is attached to the mounting bracket. It is attached to the central position of 20. At this time, the exciter 10 is mounted on the mounting bracket 20 such that the vibration direction of the movable portion 11 is the front-back direction of the vehicle as shown in FIG.

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

When the mounting bracket 20 is attached to the interior ceiling surface material 120 such that the notch 120a of the interior ceiling surface material 120 is closed by the support portion 23, the front side surface of the side surface abutting portion 22 is the interior ceiling surface material. While contacting the cross section of 120, the lower surface 21a (contact surface) of the upper contact portion 21 contacts the upper surface (surface portion) of the interior ceiling surface member 120.

As described above, 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, energization by the acoustic signal and a magnetic field generated by the disc magnet 14 are performed. And generate a force (force based on Fleming's left-hand rule) in the front-rear direction of the vehicle. Due to this force, the movable portion 11 is moved back and forth in the front-rear direction of the vehicle. The acoustic vibration generated by the forward / backward movement 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 contact the front outer surface 12 a of the frame 12. 24 is transmitted.

The acoustic vibration transmitted from the exciter 10 to the mounting bracket 20 is a vibration that moves back and forth in the front-rear direction of the vehicle. Therefore, the acoustic vibration transmitted to the mounting bracket 20 is transmitted through the side surface contact portion 22 and the upper surface contact portion 21 (lower surface 21a) that contact the rear side surface (cross section) and the upper surface of the interior ceiling surface material 120. It is transmitted to the front side direction of the interior ceiling surface material 120 (forward direction of the vehicle). Here, the longitudinal wave has a characteristic that the transmission speed of vibration is higher 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 member 120 in the forward direction of the vehicle are quickly transmitted to the front side of the interior ceiling surface member 120.

In particular, the side surface abutting portion 22 and the upper surface abutting portion 21 are, as shown in FIG. 1B, FIG. 3, and FIG. Is attached to. Therefore, the acoustic vibration of the longitudinal wave transmitted from the exciter 10 to the mounting bracket 20 is passed through the long contact surfaces of the side surface contact portion 22 and the upper surface contact portion 21 (the lower surface 21a), and the interior ceiling. It is simultaneously transmitted to the rear side surface and the upper surface of the face material 120. Therefore, the acoustic vibrations of the longitudinal waves transmitted from the rear side surface and the upper surface of the interior ceiling surface material 120 via the contact surfaces that are long in the left and right are quickly transmitted to the entire interior ceiling surface material 120.

Further, the longitudinal acoustic vibration that is quickly transmitted to the entire interior ceiling surface material 120 vibrates the entire surface of the interior ceiling surface material 120 to generate a low frequency sound toward the inside of the vehicle. As already described, the interior ceiling panel 120 is often integrally formed of an elastic material, for example, a urethane material or the like. For this reason, 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 direction). Therefore, when the acoustic vibration of the longitudinal wave that is rapidly 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, it is possible to vibrate a wide range of the interior ceiling surface material 120 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 and positively generates a sound. Even when the interior ceiling panel 120 serves as a diaphragm for the exciter 10, longitudinal acoustic waves are quickly transmitted to the entire interior ceiling panel 120, and the entire surface of the interior ceiling panel 120 is reduced. Therefore, it is possible to suppress the sound delay due to the portion of the interior ceiling surface material 120. Therefore, it is possible to suppress the generation of an unpleasant sound (sound quality) due to the delay of the low frequency sound generated through the interior ceiling surface material 120, and it is possible to realize an excellent acoustic space without discomfort. Become.

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

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

Also, 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 supporting portion 23 is flush with the lower surface of the interior ceiling surface member 120, it becomes difficult to notice that the mounting bracket 20 is installed in the vehicle, and the quality of the vehicle interior can be improved. It will be possible.

Furthermore, since the moving direction of the movable part 11 of the exciter 10 is the front-back direction of the vehicle, the vertical vibration direction generated in the vehicle during traveling is different from the moving direction of the movable part. Therefore, it is possible to prevent the damper 17 from passively vibrating due to the vibration of the vehicle when the acoustic signal is not input to the voice coil 19 of the exciter 10. 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, the case where the exciter 10 and the mounting bracket 20 are provided at the rear end of the interior ceiling panel 120 has been described as an example. However, the installation position of the sound output device 1a is not necessarily limited to the rear end of the interior ceiling surface member 120, and may be installed at another place. For example, it may be a front end portion of the interior ceiling surface material 120, or may be a left end portion or a right end portion of the interior ceiling surface material 120.

Further, in the sound output device 1a according to the first embodiment, the mounting bracket 20 is used for the interior so that the longitudinal direction of the upper surface abutting portion 21, the side surface abutting portion 22, and the supporting portion 23 is the left-right direction of the vehicle. The case where the ceiling surface member 120 is attached has been described. However, the mounting direction of the mounting bracket 20 is not limited to the longitudinal direction of the upper 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 portion or the right end portion of the interior ceiling surface member 120 such that the lengthwise direction of the upper surface contact portion 21, the side surface contact portion 22, and the support portion 23 is the front-rear direction of the vehicle. May be attached to. Even in the case of mounting in this manner, the side surface 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 making contact with each other, the acoustic vibration output from the exciter 10 can be transmitted to the interior ceiling surface material 120 as a longitudinal wave. Since it is possible to vibrate the entire interior ceiling surface material 120 without delaying the transmission of acoustic vibration, the acoustic vibration output from the exciter 10 can be vibrated by the wide surface of the interior ceiling surface material 120. It becomes possible, and it becomes possible to enhance the acoustic effect of low frequency sound.

The interior ceiling panel 120 shown in FIGS. 1, 2A, 3 and 4 has a substantially plate shape. However, the interior ceiling panel 120 is a vehicle interior ceiling panel. Therefore, depending on the curved surface shape of the exterior ceiling surface material 110, the central portion often has a curved surface shape that gently protrudes. When the upper surface or the lower surface of the interior ceiling surface material 120 is formed by 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 panel 120.

FIG. 2B is a rear view showing a state in which, when the interior ceiling surface material 120 is formed of a curved surface, the upper surface contact portion 21 has a curved shape and is attached to the interior ceiling surface material 120. . As shown in FIG. 2B, the lower surface 21 a of the upper surface abutting portion 21 has a curved 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 attached to the interior ceiling panel 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 have a continuous curved surface shape. It is preferable. By making the lower surface of the support portion 23 and the lower surface of the interior ceiling surface member 120 into a continuous curved surface, it becomes difficult for the user in the vehicle to notice that the mounting bracket 20 is installed, and the quality of the vehicle interior is improved. It will be possible.

[Second Embodiment]
In the acoustic output device 1a according to the first embodiment, the case where the interior ceiling surface member 120 is installed at the rear end, the front end, the left end, or the right end has been described. However, the installation position of the sound 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 where the sound 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 sound output device 1b according to the second embodiment and the sound output device 1a according to the first embodiment, the exciter 10 is common, but the mounting brackets are different in shape. 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 sound output device 1b has an exciter 10 and a mounting bracket (mounting portion) 30. The mounting bracket 30 includes a flat plate-shaped side surface contact portion (contact portion) 31 having a convex shape, and a rectangular upper surface contact having the same length as the bottom side (long side) of the side surface contact portion 31. And a portion (fixed portion) 32. The side surface abutting portion 31 and the upper surface abutting portion 32 are connected at the long side portion and have an L-shaped cross-sectional shape in a side view. The side contact portion 31 and the upper 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 abutting portion 32 has a lower surface (abutting surface) 32a of the upper surface abutting portion 32 abutting on the upper surface of the interior ceiling surface member 120 such that the longitudinal direction thereof is oriented in the left-right direction of the vehicle, It is fixed to the interior ceiling surface member 120. The side surface abutting portion 31 connected to the upper surface abutting 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 standing side contact portion 31. The convex projecting 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 panel 120 via the mounting bracket 30 so that the vibration direction of the movable portion 11 is the front-back direction of the vehicle. When fixed in this manner, the end surface (front 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 near the center of the interior ceiling surface member 120, that is, near the center of the vehicle in the front-rear direction and near the center of the vehicle in the left-right direction.

As described above, when the exciter 10 and the mounting bracket 30 are attached to the interior ceiling surface material 120 and an acoustic signal is input to the voice coil 19, the movable portion 11 is moved back and forth in the front-rear direction of the vehicle. The acoustic vibration generated by the forward / backward movement of the movable portion 11 is amplified via the damper 17 and transmitted to the frame 12, and is transmitted to the side surface abutting portion 31 of the mounting bracket 30 that abuts on the front surface (front outer surface 12a) of the frame 12. To be done.

The acoustic vibration transmitted from the exciter 10 to the side contact portion 31 is a vibration that moves back and forth in the front-rear direction of the vehicle. The acoustic vibration input from the side surface abutting portion 31 to the mounting bracket 30 is transmitted by transmitting the longitudinal vibration acoustic vibration moving forward and backward to the upper surface abutting portion 32 connected to the side surface abutting portion 31. The acoustic vibration is transmitted to the interior ceiling surface member 120 that contacts the upper surface contact portion 32. Since the acoustic vibrations transmitted to the interior ceiling surface material 120 are longitudinal waves, the acoustic vibrations are quickly transmitted from the vicinity of the central portion of the interior ceiling surface material 120 to the outer side surface.

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

Further, the longitudinal acoustic vibrations that are quickly transmitted to the entire interior ceiling surface material 120 vibrate the entire surface of the interior ceiling surface material 120 to generate a low frequency sound inside 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 direction). Therefore, when the acoustic vibration of the longitudinal wave that is 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. The bending allows the wide range of the interior ceiling surface material 120 to 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 and positively generates a sound. Even when the interior ceiling panel 120 is an exciter diaphragm, longitudinal acoustic waves are quickly transmitted to the entire interior ceiling panel 120, and the entire surface of the interior ceiling panel 120 is covered. Since it vibrates, it is possible to suppress the sound delay due to the portion of the interior ceiling surface material 120. For this reason, 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 with no discomfort.

Furthermore, since the entire surface of the interior ceiling panel 120 can be vibrated without causing a delay in the transmission of acoustic vibration, the acoustic vibration output from the exciter 10 is vibrated on the wide surface of the interior ceiling panel 120. It is possible to enhance the acoustic effect of low frequency sound. In addition, since the entire surface of the interior ceiling panel 120 can be vibrated, for example, low-frequency sounds heard by a listener sitting near the front seat in the vehicle and a listener sitting near the rear seat. There is no delay. For this reason, it becomes possible to experience a good low-frequency sound regardless of the seated position of the listener.

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

Further, since the moving direction of the movable part 11 of the exciter 10 is the front-back direction of the vehicle, the vertical vibration direction generated in the vehicle during traveling is different from the moving direction of the movable part 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, and reduce the load on the damper 17 to reduce the load on the damper 17. It becomes possible to maintain the durability for a long time.

In the acoustic output device 1b according to the second embodiment, the case where the exciter 10 and the mounting bracket 30 are provided in the vicinity of the center of the interior ceiling panel 120 has been described as an example. However, the installation position of the sound 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 place. For example, when the interior ceiling panel 120 is long in the front-rear direction and the rear portion of the interior ceiling panel 120 corresponds to the ceiling of the luggage compartment, as in a station wagon or a one-box car, It is preferable to install the sound output device 1b in the front part of the interior ceiling surface material 120, that is, in the part where the seat is installed.

Further, in the sound output device 1b according to the second embodiment, the mounting bracket 30 is attached to the interior ceiling surface member 120 so that the lengthwise direction of the side surface abutting portion 31 and the upper surface abutting portion 32 is the left-right direction of the vehicle. The case of attachment has been described. However, the mounting direction of the mounting bracket 30 is not limited to the longitudinal direction of the side surface contact portion 31 and the upper 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 member 120 such that the longitudinal direction of the side surface abutting portion 31 and the upper surface abutting portion 32 is the front-rear direction of the vehicle. Even when the mounting bracket 30 is attached to the interior ceiling surface material 120 in this manner, the acoustic vibration output from the exciter 10 can be transmitted to the interior ceiling surface material 120 as a longitudinal wave. Therefore, it is possible to vibrate the entire surface of the interior ceiling panel 120 without delaying the transmission of the acoustic vibration, so that the acoustic vibration output from the exciter 10 can be transmitted by the wide surface of the interior ceiling panel 120. It is possible to vibrate, and it is possible to enhance the acoustic effect of low frequency sounds.

Further, when the upper surface of the interior ceiling surface material 120 is formed by 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. 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.

[Third Embodiment]
FIG. 6A is a side view showing a state in which the sound output device according to the third embodiment is installed on a ceiling portion of a vehicle, and FIG. 6B is a rear view showing a state where the front side is visually recognized from the rear side of the vehicle. It is a figure. The exciter used in the sound output device 1c according to the third embodiment has a different structure from that of the exciter 10 used in the first and second embodiments.

A general exciter has a configuration in which acoustic vibration output as the movable part moves back and forth is transmitted to a vibrating member (vibrated body) via a frame, and a 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 along with the forward / backward movement of the movable unit to the vibrating member via the frame to output a low-frequency sound. A vibrating member 40a is installed in an opening portion on one end side of a voice coil bobbin provided in a movable part, and a high-mid range sound can be output through the vibrating member (for example, see Japanese Patent No. 6325957). ).

As shown in FIGS. 6A and 6B, in the sound output device 1c according to the third embodiment, the mounting bracket (mounting portion) 50 is provided at the left and right positions at the rear end of the interior ceiling panel 120. One exciter 40 is installed via each. FIG. 7 is a perspective view showing the mounting bracket 50. The mounting bracket 50 includes a rectangular upper surface abutting portion (fixing portion) 51 that is elongated in the left-right direction of the vehicle, and a rectangular side surface abutting portion (a fixed portion) that abuts a rear end portion of the interior ceiling surface member 120. The contact portion 52 and the supporting 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 attached to 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. Fixed. 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. The side surface abutting portion 52 is long in the left-right direction, and further includes a central portion (abutting portion) 52a that abuts a rear side surface (cross-sectional portion) of the interior ceiling surface material 120, and left and right end portions of the central portion 52a. It has end portions (abutting portions) 52b and 52c extending downward (downright). 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 located inside the vehicle (cabin). 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 at a right angle to the upper surface contact portion 51, and is connected to the lower end edges of the

end portions

52b and 52c forming the side surface contact portion 52. Since the support portion 53 is connected so as to be horizontal toward the vehicle front direction, the connection state of the upper surface contact portion 51, the side surface contact portion 52, and the support portion 53 is a U-shaped cross section in a side view. Is composed of. The upper 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 such that the vibrating member 40a provided at the tip of the voice coil bobbin faces the front of the vehicle and the opposite frame end contacts the front side surfaces of the

end portions

52b and 52c of the mounting bracket 50. . A portion of the mounting bracket 50 on the vehicle interior side (vehicle compartment) and the exciter 40 are covered with a speaker grill 60. The speaker grill 60 is a box body having an opening formed on the front surface (side surface on the front side of the vehicle). The front opening is formed to guide the high-midrange sound output from the vibrating member 40a of the exciter 40 into the room, and the opening is covered with the mesh material 60a that does not hinder the sound output.

As described above, when the exciter 40 is attached to the rear portion of the interior ceiling surface member 120 via the attachment bracket 50 and an acoustic signal is input to the voice coil, the movable portion is moved forward and backward in the vehicle. By vibrating the vibrating member 40a provided at the opening on the one end side of the voice coil bobbin, a high-midrange sound is output in the vehicle front direction. The listener in the vehicle can enjoy the high-midrange sound by the sound output from the front surface of the exciter 40.

On the other hand, the acoustic vibration generated by the moving back and forth of the movable part 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 the frame. The acoustic vibration transmitted to the

end portions

52b and 52c is transmitted to the central portion 52a of the side surface contact portion 52 which is integrally formed. Here, the central portion 52a of the side surface abutting portion 52 is in contact with the rear side surface (cross-section portion) of the interior ceiling surface member 120. The acoustic vibration transmitted from the exciter 10 to the side surface abutting portion 52 is a longitudinal wave that travels in the front-rear direction because it is a vibration that moves back and forth in the front-rear direction of the vehicle. Therefore, the acoustic vibration transmitted to the central portion 52a of the side surface abutting portion 52 is transmitted to the rear side surface (cross-sectional portion) of the interior ceiling surface material 120 that abuts the central portion 52a, and the interior ceiling surface material 120. In the vertical direction, it becomes a longitudinal wave and is transmitted in the forward 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 generated longitudinal waves are simultaneously transmitted through the long contact surface in the central portion 52a while maintaining a constant width in the left-right direction of the interior ceiling surface material 120 (long length of the central portion 52a). It is transmitted in the forward direction. The acoustic vibration of the longitudinal wave thus transmitted is quickly transmitted to the entire interior ceiling surface material 120.

In this way, when the interior ceiling surface material 120 vibrates in the vertical direction, the interior ceiling surface material 120 functions as a vibration plate of the exciter 40 and positively generates a sound. Even when the interior ceiling panel 120 serves as a diaphragm of the exciter 40, longitudinal acoustic waves are quickly transmitted to the entire interior ceiling panel 120, so that the entire surface of the interior ceiling panel 120 is reduced. Therefore, it is possible to suppress the sound delay due to the portion of the interior ceiling surface material 120. For this reason, 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 with no discomfort.

Furthermore, since the entire surface of the interior ceiling surface material 120 can be vibrated without causing a delay in the transmission of acoustic vibration, the acoustic vibration output from the exciter 40 is vibrated on the wide surface of the interior ceiling surface material 120. It is possible to enhance the acoustic effect of low frequency sound. In addition, since the entire surface of the interior ceiling panel 120 can be vibrated, for example, low-frequency sounds heard by a listener sitting near the front seat in the vehicle and a listener sitting near the rear seat. There is no delay. For this reason, it becomes possible to experience a good low-frequency sound regardless of the seated position of the listener.

Further, when the upper surface of the interior ceiling surface material 120 is formed by 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, and the lower surface. It is desirable to bring 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.

Furthermore, since the moving direction of the movable part of the exciter 40 is the front-back direction of the vehicle, the vertical vibration direction generated in the vehicle during traveling is different from the moving direction of the movable part. Therefore, when there is no signal input to the voice coil of the exciter 40, it is possible to prevent the damper from vibrating passively due to the vibration of the vehicle, reduce the load on the damper, and improve the durability of the damper. It becomes possible to maintain it for a long time.

In addition, in the mounting bracket 50 according to the third embodiment, the side surface abutting portion 52 has the central portion 52a, and the central portion 52a abuts the rear side surface (cross-sectional portion) of the interior ceiling surface member 120 to cause acoustic vibration. The case has been described in which the acoustic vibration including the longitudinal waves is transmitted in the vehicle front direction in the interior ceiling surface material 120. However, even if the side surface abutting 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, acoustic vibrations formed by longitudinal waves are generated. It is possible to transmit in the front direction of the vehicle.

For example, the side surface abutting portion 52 does not have the central portion 52a, the left and right rear end edges of the upper surface abutting portion 51, the

end portion portions

52b, 52c of the side surface abutting portion 52 are perpendicular to the upper surface abutting 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 surface abutting portion 52 so as to be horizontal in the vehicle front direction. In this case, only a part of the

end portions

52b and 52c abuts on the rear side surface (cross-section portion) of the interior ceiling surface member 120, and compared with the case where the side surface abutting portion 52 has the central portion 52a. The contact area becomes smaller.

However, the upper surface contact portion 51 is connected to the upper end edges of the

end portions

52b and 52c, and the upper surface contact portion 51 is fixed by contacting the lower surface 51a with the upper surface of the interior ceiling surface member 120. There is. Therefore, the acoustic vibration generated by the movable portion of the exciter 40 moving forward and backward is transmitted to the

end portions

52b and 52c of the side surface abutting portion 52 of the mounting bracket 50 that abuts the frame, and the transmitted acoustic vibration is 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 member 120 contacted with the upper surface contact portion 51. Since the acoustic vibrations transmitted to the interior ceiling surface material 120 are longitudinal waves, they are transmitted from the rear portion of the interior ceiling surface material 120 to the vehicle front direction.

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

[Embodiment 4]
8A and 8B are diagrams showing a vehicle door on the right side provided with the sound output device according to the fourth embodiment, wherein FIG. 8A is a front view showing a state viewed from the inside of the vehicle, and FIG. It is a horizontal sectional view showing an AA section of (a), and (c) is a vertical sectional view showing a BB section of (a). The sound output device 1d according to the fourth embodiment is not installed on the interior ceiling surface material 120 but is provided on the door trim of the vehicle door, and thus the sound output device 1a according to the first to third embodiments is provided. Different from 1b and 1c.

The vehicle door 200 includes an exterior side material (outer panel) 210 that constitutes an outer side surface of the vehicle door 200, an internal reinforcing surface material (inner panel) 220 that constitutes an inside of the vehicle door, and a side surface inside the vehicle. It has a door trim (lining surface material, interior surface material) 230 constituting it. The internal reinforcing surface member 220 constitutes the skeleton of the vehicle door 200, and a window frame is formed in the upper part. 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 member 220. The door trim 230 is a resin molded product, and is an interior material that covers the side surface on the vehicle interior side of the internal reinforcing surface material 220. If necessary, a door armrest, a door pull handle, etc. are integrally formed. Since the user may use it as an elbow rest when the vehicle is traveling, the door trim 230 is made of a material having elasticity, and leather or cloth is applied to the surface as necessary.

The door trim 230 has a shape in which the center part is slightly bulged inward as compared to the top, bottom, left and right ends. When the door trim 230 is attached to the inner side surface of the inner reinforcing surface member 220, a space is secured between the back surface of the door trim 230 and the side surface of the inner reinforcing surface member 220. The sound output device 1d is installed on the back surface of the door trim 230 using the space between the door trim 230 and the internal reinforcing surface member 220.

The sound output device 1d according to the fourth embodiment includes 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 has a size adjusted to fit in the space between the door trim 230 and the internal reinforcing surface member 220. Therefore, detailed description of the exciter 70 according to the fourth embodiment will be omitted.

The mounting bracket 80 has a door trim contact portion (fixed 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) 81 a of the door trim 230 is a back surface of the door trim 230 in a state where the lengthwise direction is directed to the vertical direction of the vehicle door 200. It is fixed in the state of abutting against. 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 in the longitudinal direction of the door trim contact portion 81 and is the 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, in the horizontal cross section of the vehicle door 200, the door trim contact portion 81 and the exciter contact portion 81. 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 has the back surface of the door trim 230 such that the movable portion moves forward and backward with the outer surface of the frame in contact with the back surface of the exciter contact portion 82 (the rear surface of the vehicle). Fixed to. In this way, when the exciter 70 and the mounting bracket 80 are attached to the door trim 230 and an acoustic signal is input to the voice coil, the movable portion is moved forward and backward in the vehicle front-rear direction. The acoustic vibration generated by the forward / backward movement of the movable portion is amplified through the damper, transmitted to the frame, and transmitted to the exciter contact portion 82 that contacts the front surface of the frame. The acoustic vibration transmitted from the exciter 70 to the exciter contact portion 82 is a vibration that moves back and forth 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 contacts the door trim contact portion 81. It is transmitted to the door trim 230 that abuts 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 longitudinal vibration acoustic vibration transmitted from the exciter 70 to the mounting bracket 80 is applied to the door trim contact portion 81. Through the long contact surface 81a of the contact portion 81, the door trim 230 is transmitted all at once in the front-rear direction of the vehicle while maintaining a constant vertical width (at least the long length of the door trim contact portion 81). . The longitudinal vibration acoustic vibration transmitted to the door trim 230 via the contact surface 81a of the vertically long door trim contact portion 81 is rapidly transmitted to the entire door trim 230.

Furthermore, the acoustic vibration of the longitudinal wave that is quickly transmitted to the entire door trim 230 vibrates the entire surface of the door trim 230 to generate a low frequency sound to the inside of the vehicle. As described above, since the door trim 230 is a resin molded product integrally formed and has a shape that covers the inside of the internal reinforcing surface member 220, it tends to bend in the in-vehicle direction. For this reason, when the acoustic vibration of the longitudinal wave rapidly 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 in the vehicle interior direction. It will be possible.

In this way, when the door trim 230 vibrates in the in-vehicle direction, the door trim 230 functions as a vibrating plate (vibrated body) of the exciter 70 and positively generates sound. Even when the door trim 230 functions as described above, acoustic vibrations of longitudinal waves are rapidly transmitted to the entire door trim 230 and vibrate the entire surface of the door trim 230. The delay of sound can be suppressed. For this reason, it is possible to suppress the generation of unpleasant sound quality due to sound delay and the like, and it is possible to realize an excellent acoustic space with no discomfort.

Furthermore, since the moving direction of the movable part of the exciter 70 is the front-back direction of the vehicle, the vertical vibration direction generated in the vehicle during traveling is different from the moving direction of the movable part. Therefore, when there is no signal input to the voice coil of the exciter 70, it is possible to prevent the damper from vibrating passively due to the vibration of the vehicle, reduce the load on the damper, and improve the durability of the damper. It becomes 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 performing the installation in the same manner.

Further, in the sound 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 vehicle rear side has been described. However, the location to which the end edge of the exciter contact portion 82 is connected is not limited to the vehicle rear side edge of the door trim contact portion 81, and may be the vehicle front side edge. Further, in the sound output device 1d according to the fourth embodiment, the case where the end edge of the exciter contact portion 82 is connected to the end edge of the longitudinal center portion of the door trim contact portion 81 has been described. However, the location to which the end edge of the exciter abutting portion 82 is connected is not limited to the end edge of the central portion of the door trim abutting portion 81 in the longitudinal direction, and the edge of the rightward portion or the leftward portion in the longitudinal direction. May be

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

Further, when the back surface of the door trim 230 is formed by a curved surface, the contact surface 81 a 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 81 a contacts the door trim 230. Contact is desirable. 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.

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

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

In the acoustic output device 1e, the movable portion 11 of the exciter 10 moves back and forth in the front-rear direction of the vehicle to generate acoustic vibration, 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 contact portion 31 to the upper contact portion 32. The acoustic vibration transmitted to the upper surface abutting portion 32 is transmitted to the interior ceiling surface material 121 that abuts the upper surface abutting portion 32, and the acoustic vibration is transmitted from the vicinity of the central portion of the interior ceiling surface material 121 to the outside. Will be transmitted.

▽ Here, there are cases where interior ceiling surface materials with lower strength than conventional ones are used for the vehicle ceiling surface. For example, the area of the ceiling surface of a light vehicle or a small vehicle is smaller than the area of a ceiling surface of a medium 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 set to be the thickness of the interior ceiling surface material for medium and large vehicles or the like. The strength of the ceiling surface material is lowered by making the thickness thinner (for example, the wall thickness of the interior ceiling surface material 120 shown in FIG. 5) or by changing the material. In this way, even if the strength of the interior ceiling surface material is lowered, it is possible to secure sufficient strength in the case of a light vehicle or the like, and it is possible to realize the original function as the interior ceiling surface material. is there.

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 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 a listener with an excellent acoustic environment using the interior ceiling surface material 121. It will not be easy.

Therefore, in the sound 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 transmitting face material 90 has a flat plate shape, and the width of the plane portion of the vibration transmitting face material 90 is larger than the area of the contact portion between the lower surface 32a of the upper surface contact portion 32 and the interior ceiling surface material 121. 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 interior ceiling surface material 121.

Further, the vibration transmitting surface material 90 has a vibration transmitting 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 formed of a material having elastic deformation performance. For example, a resin material molded into a flat plate shape is used for the vibration transmitting surface material 90. By using a resin material as the vibration transmitting face material 90, it is possible to make a face material having a constant vibration transmitting performance and a constant elastic deformation performance, and further being lightweight.

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

Furthermore, by changing the material and thickness of the vibration transmitting surface material 90 and the width of the surface portion, the quality of the acoustic vibration transmitted to the interior ceiling surface material 121 via the vibration transmitting surface material 90 (quality of sound, etc. (Including) can be adjusted. For this reason, it is possible to adjust the low-frequency sound that the listener feels to be a low-pitched sound that has a longer stretch, or to change the low-tone sound that is tight.

[Sixth Embodiment]
FIG. 10A is a side view showing a state in which the sound output device 1f according to the sixth embodiment is installed on a ceiling surface material 122 for an interior of a vehicle, and FIG. It is the rear view which showed the state.

The sound output device 1f according to the sixth embodiment includes the exciter 10 and the mounting bracket 30, similarly to the sound output device 1b according to the second embodiment. However, in the mounting bracket 30 of the sound output device 1f according to Embodiment 6, 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 sound output device 1b in the vehicle front-rear direction. Differences in points. In the sound output device 1f according to the fifth embodiment, the upper surface abutting portion of the mounting bracket 30 is denoted by reference numeral 33, and is referred to as “upper surface abutting portion 33”. The configuration of the sound output device 1f other than the upper surface contact portion 33 is the same as that of the sound output device 1b according to the second embodiment, and thus the same reference numerals are given and the description thereof is omitted here.

As shown in FIGS. 10A and 10B, in the sound output device 1f, the upper surface abutting portion 33 of the mounting bracket 30 is extended in the vehicle front-rear direction, and the lower surface 33a of the upper surface abutting portion 33 and interior parts are used. The contact area with the upper surface of the ceiling panel 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, a large area of the interior ceiling surface material 122 can be actively vibrated, and a dynamic acoustic environment can be provided to the listener.

Furthermore, by adjusting the thickness or material (for example, metal material) of the upper surface abutting 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 abutting portion 33. It is possible. By finely adjusting the surface wave of the upper surface abutting portion 33 in this manner, it becomes possible to output a mid-high range sound (fine vibration. Sound based on the surface wave) via the upper surface abutting portion 33.

However, if the mounting bracket 30 is installed in contact with the interior ceiling surface material, even if the mid-high range sound is output from the upper surface abutting portion 33 of the mounting bracket 30, the interior ceiling surface material is not exposed. The range sound is cut off and cannot be conveyed to the listener in the vehicle.

Therefore, in the sound output device 1f according to the sixth embodiment, as shown in FIGS. 10 (a) and 10 (b), a portion of the interior ceiling surface material 122 that abuts the upper surface abutting portion 33 of the mounting bracket 30. A plurality of communication holes 95 that communicate from the lower surface 33a of the upper contact portion 33 to the inside of the vehicle compartment are formed. The communication hole 95 may be formed in at least a portion of the interior ceiling surface material 122 with which 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 interior ceiling surface material 122 as the communication holes 95, or a plurality of slit-shaped communication holes 95 may be formed. It is also possible to form the rectangular hole in the interior ceiling surface material 122.

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

The sound output device according to the embodiment of the present invention has been described in detail above by exemplifying the sound output devices 1a to 1f according to the first to sixth embodiments. However, the sound output device according to the embodiment of the present invention is not limited to the examples described in the first to sixth embodiments. Those skilled in the art can use various changes 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

ceiling surface material

120, 121, 122 for the interior or the door trim 230 has been described. However, the location where the sound 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 an interior member such as various trims used in a vehicle, acoustic vibration output from an exciter is transmitted to the interior member, and the interior member is used as a vibrating member (vibrated body). Can be used.

For example, even when installing an acoustic output device for the interior trim of the rear door of a one-box car or a hatchback car, it is possible to vibrate the interior trim and generate a low frequency sound. In particular, the acoustic vibration generated by moving the moving part of the exciter back and forth is a longitudinal wave, so the acoustic vibration is quickly transmitted to the entire interior trim, and a delay may occur at each part of the interior trim. Instead, low-range sounds can be generated in the entire vehicle trim. For this reason, it is possible to suppress the occurrence of delay or the like in each low-frequency sound generated by the vibration of the vehicle interior trim, and it is possible to prevent the generation of unpleasant sound (sound quality). Therefore, it is possible to realize an excellent acoustic space in the vehicle without any discomfort. Furthermore, since the moving direction of the exciter's movable part is different from the vertical vibration direction that occurs inside the vehicle during traveling, the load on the damper due to vehicle vibration can be reduced, and the durability of the damper can be extended. It becomes possible to maintain.

1a, 1b, 1c, 1d, 1e, 1f ...

Acoustic output device

10, 40, 70 ... Exciter (acoustic vibration output unit)
11 (movable part of exciter) 12 (frame of exciter) 12a (external frame) front outer surface 13 (exciter) first yoke 14 (exciter) disk-shaped magnet 15 (exciter) second yoke 16 ... Inner side surface (of first 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 ... (Attachment bracket) Top contact part (fixed part)
21a, 32a, 33a, 51a (lower surface (contact surface))
22, 31, 52 ... Side contact part (of the mounting bracket) (contact part)
23, 53 ... Supporting part (of the mounting bracket) (fixing part)
24 ... Frame abutting part (of mounting bracket) (abutting part)
40a ... Vibration member 52a (of exciter) ... Central portion (of side contact portion) (contact portion)
52b, 52c ... (side contact portion) end portion (contact portion)
60 ... Speaker grill 60a ... Mesh material 81 ... (Attachment bracket) Door trim contact part (fixed part)
81a ... Abutting surface (of door trim abutting portion) 82 ... (Attachment bracket) exciter abutting portion (abutting portion)
90 ... Vibration transmitting surface material 95 ... Communication hole 100 ... Ceiling portion 110 ... (Ceiling portion) exterior

ceiling surface material

120, 121, 122 ... (Ceiling portion) interior ceiling surface material (interior surface material)
120a ... Notch portion 200 (of interior ceiling surface material) ... Vehicle door 210 ... (Vehicle door) Exterior side surface material 220 ... (Vehicle door) Internal reinforcing surface material 230 ... (Vehicle door) Door trim (interior surface material)
240 ... Window glass L (for vehicle door) L ... (for interior ceiling surface material)

Claims

An acoustic vibration output section that outputs acoustic vibration by moving the movable section forward and backward,
The acoustic vibration output unit, a mounting portion for mounting the interior surface material for a vehicle interior,
The mounting portion is
An abutting portion that abuts on either end of the movable portion of the acoustic vibration output portion on the advancing / retreating direction side;
The direction in which the surface portion of the interior surface material spreads is the same as the advancing / retreating direction of the movable portion, and the advancing / retreating direction is different from the gravity direction, and the acoustic vibration output unit is It has a fixing part that is fixed to the interior surface material,
The sound output device, wherein the contact portion and the fixed portion are connected or integrally formed.
The sound output device according to claim 1, wherein the contact portion also contacts a cross section of the interior surface material.
The sound output device according to claim 1 or 2, wherein the fixing portion has a contact surface that contacts the surface portion of the interior surface material.
The sound 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 with which the fixing portion abuts is provided with a communication hole that communicates from the abutting surface of the fixing portion to the inside of the vehicle interior. apparatus.
The acoustic output device according to claim 1, further comprising a vibration transmitting surface material between the mounting portion and the interior surface material.