JP2001298787A - Speaker system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a speaker system whose direction can be varied in matching with a direction of a listener. SOLUTION: The speaker system consists of a rotary reference face forming means 11 that forms a rotary reference face 16, a rotary face forming means 3 that forms a rotary face 14 turnable along the rotary reference face 16, and a speaker 1 that is fitted to the rotary face forming means 3 tilted at a prescribed angle with respect to the rotary reference face 16. Turning the rotary face forming means 3 can make the azimuth of a reference axis 10 of the speaker 1 variable.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention belongs to the field of acoustic speaker devices.

[0002]

2. Description of the Related Art FIG. 15 is a sectional view showing a conventional speaker device, and shows a structure in which the speaker device is mounted on a door in a vehicle compartment of an automobile. In FIG. 15, a speaker 101 which is a main body of the speaker device includes a diaphragm 102 for generating a sound wave.
And an electromagnetic circuit for driving the same. The structure around the speaker 101 includes a frame 103 that holds the diaphragm 102, a gasket 104 that maintains the airtightness of the front and rear spaces of the diaphragm 102, a sponge that attaches the gasket 104 to a door interior material (not shown), and the like. 105 made of an elastic material, an input terminal 106 for inputting an acoustic signal, and a diaphragm 10 from raindrops entering the inside of the door.
2 is provided, and the waterproof cover 107 is attached to an inner panel 108 which is an inner member of a vehicle door by fixing with a screw 109. Here, reference numeral 110 denotes a reference axis which is a central axis of vibration of the diaphragm 102.

In general, a speaker 101 has a reference axis 11
In a diagonal direction inclined from the center azimuth of 0, the sound pressure level in the mid-high range tends to be low due to its directional frequency characteristics. For this reason, the reference axis 110 is inclined and attached so that the direction of the reference axis 110 is as close as possible to the direction of the listener. For example, in a vehicle-mounted speaker 101, as shown in FIG. 15, the seat surface of the inner panel 108 is inclined, and when the speaker 101 is attached with a screw 109 via the waterproof cover 107, the reference axis of the speaker 101 is The direction of 110 is directed to the direction of the occupant who is the listener. The seating surface of the inner panel 108 is pressed using a press die designed and manufactured so as to have a predetermined inclination angle, and the mounting angle of the speaker 101 is fixed thereby.

Generally, the directional frequency characteristics of the speaker 101 differ depending on the type of the speaker 101 used. For this reason, when the speaker 101 is mounted on a vehicle, the angle of the mounting seat surface at which the best sound quality is obtained for the occupant who is the listener differs depending on the type of the speaker 101 used.

FIG. 16 is a configuration diagram showing an arrangement of a conventional vehicle speaker system. Generally, as shown in FIG. 16, a left speaker 101 is used symmetrically with left and right doors in a vehicle compartment, as shown in FIG.
a and the right speaker 101b. Thus, in order to mount the speakers 101a and 101b symmetrically to the inner panels 108 of the left and right doors, the mounting seat surface of the inner panel 108 also has a symmetrical structure.

[0006]

In the above-described conventional speaker device, particularly when the speaker device is mounted on a vehicle door, the mounting angle of the speaker 101 is determined by the inclination angle of the seat surface of the inner panel 108 which is a member of the vehicle door. In addition, since the positional relationship between the door and the occupant seat is different for each vehicle type, there is a problem that the inclination angle of the seat surface of the inner panel 108 needs to be designed for each vehicle type.

[0007] For example, even if the seat surface of the waterproof cover 107, which is a mounting portion of the speaker 101, has its own inclination angle, if the inclination angle is set according to one vehicle type,
There is a problem that an optimum inclination angle cannot be obtained with other types of vehicles having different vehicle interior dimensions.

Further, since the directional frequency characteristics of the speaker 101 vary depending on the type of the speaker 101, for example, when a listener installs a new commercially available speaker 101 selected by the listener on a vehicle door, the seat surface of the inner panel 108 of the existing door is used. Is not suitable for the directional frequency characteristics of the new speaker 101, and good sound quality cannot be obtained.

Further, even if the vertical direction of the seat surface of the inner panel 108 of the vehicle door to which the speaker 101 is attached is directed toward the occupant who is the listener, for example,
In the case of a right-hand drive vehicle, the azimuth of the reference axis 110 of the right speaker 101b is oriented toward the occupant sitting in the driver's seat, and the azimuth of the reference axis 110 of the left speaker 101a is oriented in the direction of the occupant sitting in the front passenger's seat. It had a structure to aim. Therefore, for example, when an occupant only gets in the driver's seat, the sound generated from the right speaker 101b is good for the occupant, but the sound generated from the left speaker 101a is assumed to be an occupant in which the left speaker 101a is sitting in the passenger seat. Since the loudspeaker is mounted at an angle, its directional frequency characteristics are deteriorated, the sound is inferior to the sound generated from the right speaker 101b, and there is a problem in that the sound field becomes left-right asymmetric.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has as its object to provide a speaker device whose direction can be changed according to the direction of a listener.

[0011]

According to the present invention, there is provided a loudspeaker apparatus comprising: a rotation reference plane forming means for forming a rotation reference plane; and a rotation plane formation means for forming a rotation plane rotatable along the rotation reference plane. And a speaker attached to the rotating surface forming means at a predetermined angle with respect to the rotation reference surface, and the reference axis direction of the speaker is made variable by rotation of the rotating surface forming means.

In the speaker device according to the present invention, the rotating surface forming means is any one of a frame, a gasket, and a waterproof cover.

[0013] In the speaker device according to the present invention, the structure for shielding sound waves generated from the speaker includes:
It is arranged at a position at least a predetermined distance from the reference axis of the speaker.

Further, the speaker device according to the present invention is provided with fixing means for fixing the rotation of the rotating surface forming means.

Further, the speaker device according to the present invention is provided with an airtight maintaining means for maintaining the airtightness of the front and rear space of the speaker by fitting the concave and convex portions.

Further, the loudspeaker device according to the present invention is provided with a rotation driving means for driving the rotation surface forming means to rotate.

Further, in the speaker device according to the present invention, it is determined that a listener position detecting means for detecting a listener position and a determining means for determining a rotation angle of the speaker based on the detected listener position. A control means for controlling the drive of the rotation drive means based on the rotation angle is provided.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 FIG. 1 is a cross-sectional view of the speaker device according to the first embodiment. In FIG. 1, a speaker 1, which is the main body of the speaker device, includes a diaphragm 2 for generating sound waves and an electromagnetic circuit for driving the diaphragm. The structure around the speaker 1 includes a diaphragm 2
And a gasket 4 for maintaining the airtightness of the front and rear space of the diaphragm 2 and the gasket 4 in close contact with an interior material (not shown) of the door. A cushion 5 made of an elastic material such as a sponge to be made, an input terminal 6 for inputting an acoustic signal, a waterproof cover 7 for protecting the diaphragm 2 from raindrops and the like entering the door, a mounting portion and a rotation reference surface are formed. A speaker base 11 is provided as a rotation reference plane forming means, and a rotation regulating cover 12 for regulating rotation is provided. When the speaker device is mounted on a vehicle, the speaker base 11 is attached to an inner panel 8 which is an inner member of a vehicle door.
Is fixed by screws 9.
Here, 10 is a reference axis which is the central axis of vibration of the diaphragm 2,
13 is a concave gap formed by the speaker base 11 and the rotation restricting cover 12, 14 is a flange provided on the frame 3 and serves as a rotation surface during rotation, and 15 is a rotation axis which is a central axis of rotation of the speaker 1. , 16 indicate a rotation reference plane of the speaker 1.

Next, a detailed structure will be described. In FIG. 1, the rotation reference plane 16 of the speaker 1 and the inner panel 8 of the door are parallel, and the reference axis 10 of the diaphragm 2 is
A case is shown in which the frame 3 has an inclined structure so as to be inclined at an angle of 10 ° with respect to the rotation axis 15 orthogonal to 6. The frame 3 and the waterproof cover 7 are fixed with an adhesive or the like. The frame 3 is provided with a disk-shaped flange portion 14 centered on the rotating shaft 15.
This portion becomes a rotation surface during rotation. The diaphragm 2 of the speaker 1 is fixed to the inclined surface of the frame 3.
Is inclined at an angle of 10 ° with respect to the rotation axis 15. The speaker base 11 has a structure that can be attached to the inner panel 8 with screws 9. The speaker base 11 has a frame 3 larger than the diameter of the waterproof cover 7.
A round hole with a smaller diameter than the flange part 14 is opened,
By dropping the speaker 1 into this round hole, the flange portion 14 is on the speaker base 11. The flange portion 14 and the speaker base 11 are in contact with each other on a surface, and this surface becomes a rotation reference surface 16 of the speaker 1. The rotation restricting cover 12 is fixed to the speaker base 11 to prevent the speaker 1 from falling off from the speaker base 11 and to form the flange portion 14 with a concave gap 13 formed between the speaker base 11 and the speaker base 11. Surrounding the speaker 1 restricts the shake when the speaker 1 rotates.

Next, the operation during rotation will be described. FIG. 2 is a perspective view of the speaker device according to Embodiment 1 at the time of rotation, and FIG. 3 is a cross-sectional view thereof. The rotation of the speaker 1 is regulated by a concave gap 13 formed by the speaker base 11 and the rotation regulating cover 12, and the speaker 1 rotates around a rotation axis 15 orthogonal to the rotation reference plane 16. Since the reference axis 10 is inclined at an angle of 10 ° with respect to the rotation axis 15, the azimuth of the reference axis 10 draws a circle at an angle of 10 ° about the rotation axis 15 when the speaker 1 rotates. Will change. 2 (1) and 3
(1) is a perspective view and a sectional view when the rotation angle is 0 °. FIGS. 2 (2) and 3 (2) are a perspective view and a cross-sectional view, respectively, when rotated 90 ° clockwise about the rotation shaft 15. In this case, it can be seen from the cross-sectional view that the rotation axis 15 and the reference axis 10 coincide with each other. However, while the rotation axis 15 is parallel to the paper surface, the reference axis 10 is inclined by 10 ° toward the front of the paper surface. Become. FIG. 2 (3) and FIG. 3 (3)
9A and 9B are a perspective view and a cross-sectional view in a case where the rotation is further performed by 90 ° around the rotation shaft 15 and the rotation angle becomes 180 ° in total.
As described above, when the speaker 1 rotates, the azimuth of the reference axis 10 is three-dimensionally inclined at 10 ° with respect to the rotation axis 15 indicating the direction perpendicular to the surface of the inner panel 8 as the mounting surface. Changes to For example, at a position 70 cm away from the mounting surface, the azimuth of the reference axis 10 changes so as to draw a circle having a radius of about 12 cm with respect to the rotation axis 15. At a position 100 cm away from the mounting surface, the azimuth of the reference axis 10 changes so as to draw a circle having a radius of about 18 cm with respect to the rotation axis 15.

Next, the change in the frequency characteristic of the reproduced sound when the azimuth of the reference axis 10 of the speaker 1 deviates from the listener's direction will be described. FIG. 4 shows directional frequency characteristics of the speaker device according to the first embodiment. The horizontal axis indicates the frequency of the reproduced sound (unit hertz, Hz), and the vertical axis indicates the sound pressure level (unit decibel, dB). The center azimuth of the reference axis 10 is 0 °, and the azimuths tilted by 10 ° and 30 ° therefrom. Are indicated by a solid line, an alternate long and short dash line, and a broken line, respectively. According to FIG. 4, in the azimuth inclined from 0 ° to 10 ° and 30 ° in the center azimuth of the reference axis 10, especially when the sound pressure level of the mid-high frequency range from 600 Hz to 20 KHz is 0 ° in the center azimuth. As a result, it can be seen that it is gradually deteriorated. For example, comparing sound pressure levels at a frequency of 8 kHz,
Approximately 3 at 10 ° tilt with respect to the central azimuth of reference axis 10 of 0 °
There is a drop of about 6 dB at 30 dB tilt in dB. From this, it can be seen that by bringing the azimuth of the reference axis 10 of the speaker 1 as close as possible to the direction of the listener, a flatter sound pressure frequency characteristic is approached, and better sound quality can be obtained for the listener.

As described above, according to the first embodiment, the speaker 1 is mounted on the frame 3 which rotates with the speaker base 11 as the rotation reference plane 16 so as to be inclined at a predetermined angle with respect to the rotation reference plane 16. By rotating the frame 3, the direction of the reference axis 10 of the speaker 1 can be changed, and the direction of the reference axis 10 can be adjusted to the direction of the listener. As a result, it is possible to suppress deterioration in sound quality due to misalignment of the reference axis 10, and to obtain a speaker device having excellent sound quality. Further, since the frame 3 holding the speaker 1 also serves as a rotating surface during rotation, the structure of the rotating mechanism can be easily configured.

Embodiment 2 FIG. FIG. 5 is a cross-sectional view of the speaker device according to the second embodiment. The second embodiment differs from the first embodiment shown in FIG. 1 in that the flange 14 provided on the frame 3 of the speaker 1 has a structure provided on the gasket 4. Are the same as in FIG.

In FIG. 5, a flange portion 14 for forming a rotating surface during rotation is formed on a gasket 4 as a rotating surface forming means.
Is provided. The flange portion 14 is held by a speaker base 11 as a rotation reference surface forming means for forming a rotation reference surface 16 and a concave gap 13 formed by a rotation restricting cover 12. The gasket 4 rotates around a rotation axis 15 perpendicular to a rotation reference plane 16. The loudspeaker 1 is mounted on the frame 3 so that the reference axis 10 of the diaphragm 2 is inclined by 10 ° with respect to the rotation axis 15.
Is fixed to the inclined mounting surface of the gasket 4 through a hole. Therefore, the rotation of the gasket 4 causes the azimuth of the reference axis 10 of the speaker 1 to change to the rotation axis 15.
Will change to draw a circle around.

FIG. 6 is a sectional view of the speaker device according to the second embodiment when it is rotated. In FIG. 6, gasket 4
The flange portion 14 is regulated by the speaker base 11 and the rotation regulating cover 12, and rotates around the rotating shaft 15. FIG. 6A is a cross-sectional view when the rotation angle is 0 °. FIG.
(2) is a cross-sectional view in the case of rotating 90 ° clockwise about the rotation shaft 15. In this case, the rotation axis 15 and the reference axis 10 appear to be coincident in a cross-sectional view. However, while the rotation axis 15 is parallel to the paper surface, the reference axis 10 is inclined by 10 ° toward the front of the paper surface. Become. FIG. 6C shows a further rotation by 90 ° about the rotation axis 15 so that the rotation angle is 1
It is sectional drawing when it becomes 80 degrees.

In the first embodiment, the gasket 4 and the cushion 5 are fixed to the rotation restricting cover 12,
Although they did not rotate, they also rotate with the speaker 1 in the second embodiment.

As described above, according to the second embodiment, the speaker 1 is attached to the rotating gasket 4 using the speaker base 11 as the rotation reference surface 16 so as to be inclined at a predetermined angle with respect to the rotation reference surface 16. By rotating the gasket 4, the direction of the reference axis 10 of the speaker 1 can be changed,
The direction of the reference axis 10 can be adjusted to the direction of the listener. As a result, it is possible to suppress deterioration in sound quality due to misalignment of the reference axis 10, and to obtain a speaker device having excellent sound quality. In addition, since the gasket 4 attached to the speaker 1 also serves as a rotating surface during rotation, a rotation mechanism can be configured mainly by the structure of the gasket 4.

In the first or second embodiment, the example in which the flange portion 14 is provided on the frame 3 or the gasket 4 has been described.
4 may be provided (not shown). Thus, the frame 3, the gasket 4, the waterproof cover 7 attached to the speaker 1
In any of the above, even if the flange portion 14 serving as a rotating surface is provided,
Since the rotating mechanism can be configured, the degree of freedom in the structural design of the rotating mechanism is increased.

Embodiment 3 Next, another structure example is shown as a third embodiment. Here, an example in which the gasket 4 and the cushion 5 fixed to the rotation restricting cover 12 in FIG. 1 of the first embodiment are fixed to the speaker base 11 is shown. FIG. 7 is a cross-sectional view of the speaker device according to the third embodiment. A gasket 4 and a cushion 5 also having a large diameter are fixed on the circumference of a speaker base 11 as a rotation reference plane forming means having a large diameter. The sound wave generated from the speaker 1 is radiated around the reference axis 10. However, since the reference axis 10 is inclined with respect to the rotation axis 15, the gasket 4 and the cushion 5 rotate around the rotation axis 15. If the gasket 4 or the cushion 5 is fixed to the regulating cover 12, a part of the sound wave is shielded and disturbed, and the frequency characteristics of the reproduced sound may be reduced and the sound quality may be deteriorated. According to the third embodiment, gasket 4 and cushion 5
Can be installed outside the range from which sound waves are radiated, and sound quality degradation due to the above-described shielding can be prevented.

As described above, according to the third embodiment, since the sound wave generated from the speaker 1 by the gasket 4 or the cushion 5 is not shielded, sound quality deterioration due to the shielding can be prevented, and the sound quality can be improved. Can be.

In the third embodiment, the case where the rotating surface forming means of the speaker 1 is the frame 3 has been described. However, the rotating surface forming means may be the waterproof cover 7 (not shown). However, the same effect can be obtained.

Embodiment 4 FIG. Next, an example in which a fixing means for fixing the speaker 1 after rotating the speaker 1 will be described. FIG. 8 is a perspective view of the speaker device according to the fourth embodiment. FIG. 9 is a sectional view thereof. 8 and FIG.
Denotes a rotation-stop lock structure provided on the rotation restricting cover 12, and the other structure is the same as that of the first embodiment shown in FIG. The rotation restricting cover 12 is formed in a shape including a screw hole, and a U-shaped slit surrounding the screw hole is provided to provide a rotation preventing lock structure 17 which is deformed by screwing.

FIG. 9B is an enlarged view of a portion surrounded by a dashed-dotted circle in FIG. 9A, and shows the operation of the anti-rotation lock structure 17. When the speaker base 11 and the rotation restricting cover 12 are screwed to the inner panel 8 with the screws 9, the anti-rotation lock structure 17 is pressed and deformed by the screws 9, and the flange portion 14 of the frame 3 becomes the speaker base 11. And is fixed so as not to rotate.

As described above, according to the fourth embodiment, after the azimuth of the reference axis 10 is properly adjusted by the rotation of the speaker 1, the anti-rotation lock structure 17 provided on the rotation restricting cover 12 with the screw 9 is used. , The rotation of the speaker 1 can be fixed. Thereby, it is possible to prevent the sound quality from deteriorating due to the rattling of the speaker 1 or the deviation of the rotation angle due to vibration or impact applied during running of the vehicle.

Embodiment 5 FIG. Next, another example including a fixing means will be described. FIG. 10 is a cross-sectional view of the speaker device according to the fifth embodiment. In FIG. 10A, reference numeral 18 denotes a step portion provided on the flange portion 14 of the frame 3, and other structures are the same as those of the first embodiment shown in FIG. On the inner diameter side of the flange portion 14 of the frame 3, a disc-shaped step portion 18 having a diameter larger than a hole opened in the inner panel 8 of the door.
Is provided. The speaker base 11 has a hole smaller than the outer diameter of the flange portion 14 of the frame 3 and larger than the outer diameter of the step portion 18. Further, when the speaker base 11 is mounted on the inner panel 8, the stepped portion 1 of the frame 3 is more than the mounting surface of the speaker base 11.
8 has a structure in which the upper surface is set to be higher from 0 mm to 1 mm in the height direction. FIG. 10 (2)
It is the enlarged view which expanded the part enclosed with the dashed-dotted line circle of FIG. As shown in this figure, when attaching the speaker base 11 to the inner panel 8 with the screws 9, the frame 3
Is inserted between the inner panel 8 and the rotation restricting cover 12, and the frame 3 is fixed so as not to rotate.

As described above, according to the fifth embodiment, the stepped portion 18 of the frame 3 can be used for the loudspeaker 1 without the rotation preventing lock structure 17 as shown in the fourth embodiment. The rotation can be fixed. Thereby, it is possible to prevent the sound quality from deteriorating due to the rattling of the speaker 1 or the deviation of the rotation angle due to vibration or impact applied during running of the vehicle.

In the fourth and fifth embodiments,
Although the example in which the rotating surface forming means of the speaker 1 is the frame 3 has been described, the rotating surface forming means may be the gasket 4 or the waterproof cover 7 (not shown), and the same effect can be obtained in this case.

Embodiment 6 FIG. Next, as a sixth embodiment, an example will be described in which a rotation drive unit that drives the speaker 1 to rotate is provided. FIG. 11 is a front view of the speaker device according to the sixth embodiment. In FIG. 11, a gear 19 is formed on the outer periphery of the gasket 4, which is a rotating surface forming means of the speaker 1, and meshes with a pinion gear 20. The pinion gear 20 meshes with a worm gear 22 having a helical gear attached to a rotation shaft that is a drive shaft of a drive motor 21 as a rotation drive unit. The other detailed configuration of the speaker 1 is described in Embodiment 2.
5 is the same as FIG. When the drive motor 21 rotates, the rotational force is transmitted to the gear 19 formed on the outer periphery of the gasket 4 fixed to the speaker 1 via the worm gear 22 and the pinion gear 20, and the speaker 1 rotates the rotating shaft 15. It will rotate around the center.

FIG. 12 is a cross-sectional view showing an example of a configuration in which the speaker device provided with the rotating mechanism shown in FIG. 11 is mounted on a vehicle door. In FIG. 12A, the speaker 1 is attached by fixing a speaker base 11 to an inner panel 8 which is an inner member of a vehicle door with screws 9. The door interior material 24 is the speaker 1
And the door panel 23 so as to cover the inner panel 8. The interior material 24 is formed with a grill opening 25 composed of a number of holes for emitting the sound generated from the speaker 1 into the vehicle interior. A cylindrical rib 26 is formed inside the grill opening 25, and fine irregularities are formed on the outer periphery of the cylindrical portion of the rib 26. On the other hand, fine irregularities are also formed on the inner periphery of the cylindrical portion of the gasket 4 as an airtightness maintaining means for maintaining the airtightness of the front and rear spaces of the diaphragm 2 of the speaker 1. By fitting with the formed concavo-convex portion, a narrow gap portion 27 which is a maze-shaped gap is formed. By having such a structure, the airtightness of the space before and after the diaphragm 2 is maintained regardless of the presence or absence of rotation of the speaker 1, and the sound quality of the reproduced sound due to the interference of the sound waves generated before and after the diaphragm 2 is reduced. Can be prevented.

FIG. 12B is an enlarged cross-sectional view of the peripheral portion of the narrow portion 27 surrounded by the one-dot chain line circle in FIG. The rib 26 and the gasket 4 are fitted with each other while keeping a gap of about 1 mm in the narrow portion 27.
Generally, the acoustic resistance of the narrow portion 27 is inversely proportional to the cube of the gap size, so that the gap size is set to a small value of 1 mm or less so as to maintain sufficient airtightness. In general, the acoustic resistance of the narrow portion 27 increases in proportion to the length of the overlap of the uneven portions. Therefore, if the overlap of the uneven portions of the rib 26 and the gasket 4 is increased to double or triple, the airtightness is improved. Can be further improved. When the speaker 1 rotates, since the gasket 4 and the rib 26 maintain a gap in the narrow portion 27, the gasket 4 rotates around the outer periphery of the rib 26 of the interior material 24 while maintaining the airtightness. Will do.

As described above, according to the sixth embodiment, the rotation of speaker 1 can be electrically driven by drive motor 21, so that the listener can easily adjust the orientation of reference axis 10 of speaker 1. Becomes possible.

Further, according to the sixth embodiment, since the airtightness maintaining means for maintaining the airtightness of the front and rear spaces of the diaphragm 2 by fitting the concave and convex portions is provided, regardless of whether the speaker 1 is rotated or not, the vibration is maintained. The airtightness of the space before and after the plate 2 is maintained, and the deterioration of the sound quality of the reproduced sound due to the interference of the sound waves generated before and after the diaphragm 2 can be prevented. Further, it is not necessary to provide the cushion 5, and the number of parts can be reduced.

In the sixth embodiment, an example is shown in which an electric drive motor 21 is used as the rotary drive means. However, a manual rotary drive such as a rotary lever for manually rotating a drive shaft to which the worm gear 22 is attached is used. Means may be used, and in this case, the same effect can be obtained.

Embodiment 7 FIG. Next, as a seventh embodiment, in the speaker device provided with the rotation driving means of the sixth embodiment, a listener position detecting means for detecting a listener position, and a speaker based on the detected listener position are further provided. An example is provided that includes a determination unit that determines a rotation angle and a control unit that drives and controls a rotation driving unit based on the determined rotation angle.

FIG. 13 is a system configuration diagram of the speaker device according to the seventh embodiment. Left and right audio signals generated from an audio unit 28 such as a stereo radio are amplified by an amplifier 29 and input to input terminals 6 of a left speaker 1a and a right speaker 1b attached to left and right doors of the vehicle, respectively, and are output as sounds. Will be played. Left and right speakers 1
A drive motor 21 as a rotation drive unit shown in FIG. 11 of the sixth embodiment is incorporated in each of a and 1b. A motor control unit 30 is connected to the left and right drive motors 21 as control means for controlling the rotation of the drive motors 21 by drive signals. The motor control unit 30 includes left and right speakers 1a,
A controller 31 for manually inputting the rotation angle of 1b is connected. Further, a judging unit 33 for judging the rotation angles of the left and right speakers 1a and 1b based on the position of the occupant detected by the sensor 32 as a listener position detecting means.
Is connected. Here, the sensor 32 includes a pressure sensor installed under each seat to detect the presence or absence of an occupant, a position sensor installed on a slider of each seat to detect a sliding position in the front-back direction, and the like.

Next, the operation will be described. here,
The operation when two listeners, who are listeners, respectively sit on the driver's seat (right seat) and the passenger seat (left seat) of the vehicle will be described.
The value of the rotation angle of the speakers 1a and 1b is
When the speakers 1a and 1b are viewed from the front, the clockwise rotation angle is a positive value, and the counterclockwise rotation angle is a negative value. When the rotation angle is 0 °, the reference axis 10 is the rotation axis 1
Suppose that it is in a state of being inclined 10 ° directly above 5.

In FIG. 13, the sensor 32 detects that the occupant is in both the driver's seat and the passenger's seat and that the sliding position of both seats is in front, and transmits a detection signal to the determination unit 33. Upon receiving this, the determination unit 33 determines the reference axis 1 of the left and right speakers 1a and 1b in the direction of the occupants in both seats.
It is determined that -30 ° is optimal for the left speaker 1a and + 30 ° is optimal for the right speaker 1b as the rotation angle so that the azimuth of 0 becomes as close as possible. The rotation angle information is transmitted to the motor control unit 30. The motor control unit 30 responds accordingly.
A rotation drive signal corresponding to each rotation angle is transmitted to the left and right drive motors 21 incorporated in the left and right speakers 1a and 1b. As a result, the rotating shafts of the left and right drive motors 21 respectively rotate, and this rotational force is transmitted through the worm gear 22 and the pinion gear 20 to the gear 1 of each gasket 4 fixed to the left and right speakers 1a and 1b.
9 and the left and right speakers 1a and 1b rotate.
In this way, the reference axes 10 of the left and right speakers 1a and 1b are stopped in the direction most suitable for the occupants in both seats.

After the operation of the automatic control as described above is completed, the occupant can operate the controller 31 to finely adjust the azimuth of each of the reference axes 10 of the left and right speakers 1a and 1b. By operating buttons, levers, and the like of the controller 31, rotation angle information of the left and right speakers 1 a and 1 b is transmitted to the motor control unit 30. Thereafter, through the same operation process as described above, the left and right speakers 1a and 1b rotate, and the azimuth of each reference axis 10 is changed, so that fine adjustment is performed. In this operation, the position of the ear for listening to the sound is different due to the difference in the physique of each occupant such as the sitting height, and accordingly, the left and right speakers 1a, 1b
Is effective as a fine adjustment when the azimuth of the reference axis 10 slightly deviates from the azimuth optimal for the occupant.

FIG. 14 is a table showing an example of the relationship between the occupant seating position of the vehicle and the optimal rotation angles of the left and right speakers 1a and 1b. For example, when the occupant is seated only in the driver's seat (right side) when the seat position of the seat is forward and the left speaker 1a rotates -15 ° and the right speaker 1b rotates + 30 °, the orientation of the reference axis 10 becomes optimal. . Similarly,
When the occupant is seated in both the driver's seat (right side) and the passenger's seat (left side) when the seat position of the seat is forward, the rotation angles of the left and right speakers 1a and 1b are respectively -30 ° and +
30 ° is optimal. Further, when the seat position of the seat is rearward and the occupants are seated on both the left and right sides, each of the seat positions is -9.
0 ° and + 90 ° are optimal.

The relationship between the seating position of the occupant and the optimal rotation angles of the left and right speakers 1a and 1b depends on the type of vehicle and the mounting positions of the left and right speakers 1a and 1b.
Since the value slightly changes, optimal control can be performed by storing the optimal value according to the installed vehicle environment in the determination unit 33 in advance.

As described above, according to the seventh embodiment, the left and right speakers 1 are selected according to the number of occupants of the vehicle and the seating position.
Since the optimal azimuth of the reference axis 10a and 1b can be automatically controlled, a vehicle-mounted acoustic system having excellent acoustic characteristics can be easily realized. The left and right speakers 1
Controller 31 for manually operating the rotation angles of a and 1b
Makes it possible for the listener to easily fine-tune the orientation of the reference axis 10 of the speakers 1a and 1b, and to obtain an acoustic space that matches the installation environment and the physique and taste of the listener. Can be.

In Embodiments 6 and 7,
The example in which the rotating surface forming means of the speaker 1 is the gasket 4 and the gear 19 is formed on the outer periphery thereof has been described, but the rotating surface forming means is the frame 3 or the waterproof cover 7 and the gear 19 is formed on the outer periphery thereof. (Not shown), and a similar effect can be obtained in this case.

[0053]

As described above, the present invention is configured as described above, and has the following effects.

According to the speaker device of the present invention, the rotation reference surface forming means for forming the rotation reference surface, the rotation surface formation means for forming the rotation surface rotatable along the rotation reference surface, and the rotation reference surface. The speaker is attached to the rotating surface forming means at a predetermined angle and the reference axis direction of the speaker is made variable by the rotation of the rotating surface forming means. And suppressing the deterioration of the sound quality due to the deviation of the reference axis direction, there is an effect that a speaker device having excellent sound quality can be obtained.

According to the speaker device of the present invention, since the rotating surface forming means is any one of a frame, a gasket, and a waterproof cover, a rotating surface during speaker rotation is formed by the frame, the gasket, and the waterproof cover. This has the effect of increasing the degree of freedom in the structural design of the rotating mechanism.

According to the loudspeaker device of the present invention, the structure for shielding sound waves generated from the loudspeaker is disposed at a position at least a predetermined distance from the reference axis of the loudspeaker.
It is possible to prevent the sound quality from being deteriorated due to the shielding and to improve the sound quality.

According to the speaker device of the present invention, since the fixing means for fixing the rotation of the rotating surface forming means is provided, it is possible to prevent the sound quality from being deteriorated due to the deviation of the rotation angle of the speaker. .

According to the loudspeaker device of the present invention, since the airtightness maintaining means for maintaining the airtightness of the front and rear space of the loudspeaker by fitting the concave and convex portions is provided, the sound quality is deteriorated due to the interference of the sound waves generated from the front and rear of the loudspeaker. There is an effect that can be prevented.

According to the loudspeaker apparatus of the present invention, the rotary drive means for rotating the rotary surface forming means is provided, so that the listener can easily adjust the reference axis direction of the loudspeaker. is there.

According to the speaker device of the present invention, a listener position detecting means for detecting a listener position, a determining means for determining a rotation angle of the speaker based on the detected listener position, and a determined rotation The control unit that drives and controls the rotation drive unit based on the angle can automatically control the optimal reference axis direction of the speaker according to the number of listeners and the seating position, and has excellent acoustic characteristics. There is an effect that a system can be obtained.

[Brief description of the drawings]

FIG. 1 is a sectional view of a speaker device according to a first embodiment of the present invention.

FIG. 2 is a perspective view of the speaker device according to Embodiment 1 of the present invention when it is rotating.

FIG. 3 is a cross-sectional view of the speaker device according to Embodiment 1 of the present invention when it is rotating.

FIG. 4 is a directional frequency characteristic of the speaker device according to the first embodiment of the present invention.

FIG. 5 is a sectional view of a speaker device according to a second embodiment of the present invention.

FIG. 6 is a cross-sectional view of the speaker device according to Embodiment 2 of the present invention when it is rotating.

FIG. 7 is a sectional view of a speaker device according to a third embodiment of the present invention.

FIG. 8 is a perspective view of a speaker device according to Embodiment 4 of the present invention.

FIG. 9 is a sectional view of a speaker device according to a fourth embodiment of the present invention.

FIG. 10 is a sectional view of a speaker device according to a fifth embodiment of the present invention.

FIG. 11 is a front view of a speaker device according to a sixth embodiment of the present invention.

FIG. 12 is a sectional view of a speaker device according to a sixth embodiment of the present invention.

FIG. 13 is a system configuration diagram of a speaker device according to a seventh embodiment of the present invention.

FIG. 14 is a table showing a relationship between an occupant seating position and a rotation angle of the speaker device according to Embodiment 7 of the present invention.

FIG. 15 is a cross-sectional view showing a conventional speaker device.

FIG. 16 is a configuration diagram showing an arrangement of a conventional in-vehicle speaker device.

[Explanation of symbols]

1 speaker, 1a left speaker, 1b right speaker,
2 diaphragm, 3 frame, 4 gasket, 5 cushion, 6 input terminal, 7 waterproof cover, 8 inner panel, 9 screw, 10 reference axis, 11 speaker base, 12 rotation control cover, 13 concave gap, 1
4 Flange part, 15 rotation axis, 16 rotation reference plane, 1
7 Detent lock structure, 18 steps, 19 gears, 20 pinion gears, 21 drive motors, 22 worm gears, 23 door panels, 24 interior materials, 25 grill openings, 26 ribs, 27 slits, 28 audio units, 29 amplifiers , 30 Motor control unit, 31
Controller, 32 sensors, 33 judgment unit, 10
1 speaker, 101a left speaker, 101b right speaker, 102 diaphragm, 103 frame, 104
Gasket, 105 cushion, 106 input terminal, 1
07 Waterproof cover, 108 Inner panel, 109
Screw, 110 reference axis

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H04R 5/02 H04R 5/02 H B

Claims (7)

[Claims] A rotation reference surface forming means for forming a rotation reference surface; a rotation surface formation means for forming a rotation surface rotatable along the rotation reference surface; A speaker device comprising a speaker attached to a rotating surface forming unit, wherein a reference axis direction of the speaker is made variable by rotation of the rotating surface forming unit. 2. The speaker device according to claim 1, wherein the rotating surface forming means is one of a frame, a gasket, and a waterproof cover. 3. The speaker device according to claim 1, wherein the structure that blocks sound waves generated from the speaker is disposed at a position at least a predetermined distance from a reference axis of the speaker. 4. The speaker device according to claim 1, further comprising fixing means for fixing rotation of the rotating surface forming means. 5. The speaker device according to claim 1, further comprising airtightness maintaining means for maintaining the airtightness of the front and rear space of the speaker by fitting the concave and convex portions. 6. The loudspeaker device according to claim 1, further comprising rotation driving means for driving the rotation surface forming means to rotate. 7. A listener position detecting means for detecting a listener position; a determining means for determining a rotation angle of a speaker based on the detected listener position; and a rotation driving means based on the determined rotation angle. 7. The speaker device according to claim 6, further comprising control means for driving and controlling the speaker.