WO2007026534A1

WO2007026534A1 - Speaker unit

Info

Publication number: WO2007026534A1
Application number: PCT/JP2006/316009
Authority: WO
Inventors: Masaki Yokota; Hajime Saitou
Original assignee: Pioneer Corporation; Pioneer System Technologies Corporation
Priority date: 2005-08-30
Filing date: 2006-08-14
Publication date: 2007-03-08
Also published as: JPWO2007026534A1; JP4521030B2

Abstract

A speaker unit is provided that is capable of giving audio information of sufficient sound quality to listeners even with a speaker installed in, for example, a relatively small room. A speaker unit (1) comprises a speaker (5) that is installed in a structural door panel (2), a mover (6) that supports the speaker (5) movably relatively to the door panel (2) in such a way that the relative position of the speaker (5) with respect to the door panel (2) can be changed, a remote controller (7), and a controller (8). The remote controller (7) gives the mover (6) a command to which direction the mover (6) moves the speaker (5). The remote controller (7) has a display (32) that displays the position of the speaker (5). The controller (8) controls the whole speaker unit (1).

Description

Specification

Speaker unit

Technical field

[0001] The present invention relates to a speaker unit including a speaker attached to a structure such as a moving object such as an automobile or a ship.

Background art

Conventionally, a speaker is provided in an automobile or a ship as a moving body in order to output various kinds of audio information. The speaker outputs audio information of various audio devices provided in the interior of the automobile or ship described above.

Disclosure of the invention

Problems to be solved by the invention

[0003] Since the interiors of the automobiles and ships described above are closed and relatively narrow, various obstacles such as persons and seats are provided in front of the above-described diaphragm of the speaker power. For this reason, it has been difficult to convey sound information of sufficient sound quality to listeners with the speakers provided in the automobiles and ships described above.

[0004] An object of the present invention is to provide a speaker unit that can transmit sound information of sufficient sound quality to a listener even with a speaker installed in a room or the like, for example, which is relatively narrow.

Means for solving the problem

[0005] In order to solve the above problems and achieve the object, the speaker unit of the present invention according to claim 1 changes a speaker installed in a structure and a relative position of the speaker with respect to the structure. A moving unit that supports the speaker so as to be movable with respect to the structure is provided.

Brief Description of Drawings

[0006] FIG. 1 is an explanatory diagram showing a schematic configuration of a speaker unit 1 according to an embodiment of the present invention.

2 is an explanatory diagram showing an overall configuration of the speaker unit shown in FIG. 3 is a plan view showing a moving part of the speaker unit shown in FIG.

FIG. 4 is a flowchart showing an example of the operation of the CPU of the control device for the speaker unit shown in FIG.

FIG. 5 is an explanatory diagram showing a modification of the moving unit shown in FIG.

FIG. 6 is an explanatory view showing another modification of the moving unit shown in FIG.

Explanation of symbols

[0007] 1 Speaker unit

2 Door panel

4 Cover

5 Speaker

6 Moving part

7 Remote control (control unit)

8 Control device (control unit)

32 Display

39 EPROM (memory means)

40 CPU (control means)

BEST MODE FOR CARRYING OUT THE INVENTION

[0008] Hereinafter, a speaker unit according to an embodiment of the present invention will be described. The speaker unit according to one embodiment of the present invention outputs a sound by providing a moving unit that can change the position of the speaker relative to the structure and that can move the speaker relative to the structure. The speaker can be moved to a position where the sound quality is optimal. In this way, even when an obstacle is provided in front of the speaker diaphragm when no sound is output, the speaker is moved to a position where the sound quality is optimal when outputting sound. A speaker installed in a small room can convey sufficient sound quality to the listener.

[0009] Further, if the operation unit for instructing the moving direction of the speaker is provided in the moving unit, the speaker can be reliably positioned at a position desired by the listener. That is, the speaker can be positioned at a position where the sound quality of the sound from the speaker is optimal while the listener listens to the sound from the speaker. [0010] Furthermore, if a display unit for displaying the position of the speaker is provided in the operation unit, the speaker can be reliably positioned at a desired position even when the speaker is arranged so as to be hidden behind the structure. it can.

[0011] Further, a storage means for storing the relative position of the speaker with the optimum sound quality when outputting sound, and a speech force at a position stored in the storage means when outputting sound. If the control means for positioning is provided, the speaker can be positioned at a position where the sound quality of the sound power without increasing the operation of the listener is optimal.

[0012] Further, when the control means outputs the audio information stored in the storage means when adjusting the position of the speaker, the listener can adjust the position of the speaker while listening to the audio information from the speaker. Therefore, the speaker can be positioned at an optimal position more reliably.

[0013] Furthermore, in a state where the speaker does not output sound, the speaker can be prevented from being damaged when not in use when it is accommodated in the cover.

Example

An embodiment of the present invention will be described with reference to FIGS. 1 to 4. As shown in FIGS. 1 and 2, the speaker unit 1 is attached to a door panel (corresponding to a structure) 2 of an automobile as a moving body.

[0015] The door panel 2 described above includes a flat panel body 3 and a cover 4 for housing the speaker 5 when the speaker unit 1 is not used (when no sound is generated from the speaker 5 described later). I have. The cover 4 is provided at the end of the panel body 3 on the side away from the hinge of the door panel 2. The cover 4 has an opening 4a on the hinge side. The cover 4 allows the speaker 5 to be inserted and removed freely through the opening 4a.

As shown in FIGS. 1 and 2, the speaker unit 1 includes a speaker 5, a moving unit 6 that supports the speaker 5 with respect to the door panel 2, and a remote controller (FIG. 2). 7) and a control device 8 (shown in FIG. 2) 8 as a control unit.

[0017] The speaker 5 is supplied with audio current from the above-described audio device (hereinafter referred to as car audio) mounted on the vehicle to the boil coil, and the diaphragm vibrates together with the voice coil according to the audio current. Thus, a sound corresponding to the above-described audio current is generated. like this In addition, the speaker 5 produces sound.

The moving unit 6 includes a first driving unit 9 and a second driving unit 10 as shown in FIG. The first drive unit 9 includes a linear guide 11, a motor 12, a ball screw 13, a potentiometer 14, and a first moving plate 15.

The linear guide 11 includes a rail 16 and a slider 17. The rail 16 is formed in a straight line shape. The rail 16 is attached to the inner surface of the panel body 3 of the door panel 2. The longitudinal direction of the rail 16 is along both the horizontal direction and the inner surface of the panel body 3 of the door panel 2. The rail 16 is provided across the inside of the cover 4 and the end of the door panel 2 near the hinge.

[0020] In the illustrated example, a pair of linear guides 11 are provided. The rails 16 of the pair of linear guides 11 are arranged in parallel to each other. The pair of rails 16 are arranged along the vertical direction so as to be spaced apart from each other. The slider 17 is supported by the rail 16 so as to be movable along the longitudinal direction of the rail 16.

The motor 12 is disposed between the rails 16 of the pair of linear guides 11. The motor 12 is attached to the inner surface of the panel body 3 of the door panel 2. In the illustrated example, the motor 12 is disposed in the cover 4. The output shaft of the motor 12 is parallel to the longitudinal direction of the rail 16 described above.

The ball screw 13 includes a screw shaft 18 and a nut 19. The screw shaft 18 is formed in a rod shape in which a thread groove is formed on the outer peripheral surface. One end of the screw shaft 18 is connected to the output shaft of the motor 12. The screw shaft 18 is rotated around its axis by the motor 12. The longitudinal direction of the screw shaft 18 is parallel to the longitudinal direction of the rail 16. The nut 19 is screwed onto the outer periphery of the screw shaft 18.

The potentiometer 14 rotatably supports the other end of the screw shaft 18 and is attached to the inner surface of the panel body 3 of the door panel 2. The potentiometer 14 detects the position of the nut 19 in the longitudinal direction of the screw shaft 18, that is, the speaker force 5 by detecting the rotation of the screw shaft 18 around the axis. The potentiometer 14 outputs information corresponding to the position of the nut 19, that is, the speaker 5 to the control device 8.

The first moving plate 15 is formed in a flat plate shape, and the slider 17 and the nut 19 described above. And both are fixed. The first moving plate 15 moves along the longitudinal direction of the screw shaft 18 as the screw shaft 18 rotates.

The second drive unit 10 includes a linear guide 21, a motor 22, a ball screw 23, a potentiometer 24, and a second moving plate 25.

The linear guide 21 includes a rail 26 and a slider 27. The rail 26 is formed in a straight line. The rail 26 is mounted on the first moving plate 15. The longitudinal direction of the rail 26 is along both the vertical direction and the inner surface of the door panel 2. That is, the longitudinal direction of the rail 26 is orthogonal to (intersects) the longitudinal direction of the rail 26 described above. The rail 26 is provided over the entire length of the first moving plate 15 in the vertical direction.

In the illustrated example, a pair of linear guides 21 are provided. The rails 26 of the pair of linear guides 21 are arranged in parallel to each other. The pair of rails 26 are spaced apart from each other along the horizontal direction. The slider 27 is supported by the rail 26 so as to be movable along the longitudinal direction of the rail 26.

The motor 22 is disposed between the rails 26 of the pair of linear guides 21. The motor 22 is mounted on the first moving plate 15. In the illustrated example, the motor 22 is disposed at the lower end of the first moving plate 15. The output shaft of the motor 22 is parallel to the longitudinal direction of the rail 26 described above.

The ball screw 23 includes a screw shaft 28 and a nut 29. The screw shaft 28 is formed in a rod shape in which a thread groove is formed on the outer peripheral surface. One end of the screw shaft 28 is connected to the output shaft of the motor 22. The screw shaft 28 is rotated around its axis by the motor 22. The longitudinal direction of the screw shaft 28 is parallel to the longitudinal direction of the rail 26. The nut 29 is screwed onto the outer periphery of the screw shaft 28.

The potentiometer 24 rotatably supports the other end of the screw shaft 28 and is attached on the first moving plate 15. The potentiometer 24 detects the position of the nut 29 in the longitudinal direction of the screw shaft 28, that is, the position of the speaker 5 by detecting the rotation of the screw shaft 28 around the axis. The potentiometer 24 outputs information corresponding to the position of the nut 29, that is, the speaker 5 to the control device 8 by force.

[0031] The second moving plate 25 is formed in a flat plate shape, and the slider 27 and the nut 29 described above. And both are fixed. The second moving plate 25 moves along the longitudinal direction of the screw shaft 28 as the screw shaft 28 rotates. A speaker 5 is attached to the second moving plate 25.

[0032] The moving unit 6 described above drives the motors 12 and 22 to move the speaker 5 relative to the door panel 2 along both the horizontal direction and the lead straight direction. That is, the moving unit 6 moves the speaker 5 with respect to the door panel 2 along two directions that are orthogonal to (intersect) each other. Thus, the moving unit 6 supports the speaker 5 so as to be movable with respect to the door panel 2 so that the relative position of the speaker 5 with respect to the door panel 2 can be changed.

[0033] As shown in FIG. 2, the remote controller 7 includes a flat box-shaped casing 30, an operation unit 31 provided in the casing 30, a display unit 32 provided in the casing 30, A transmitter and a receiver provided in the housing 30 are provided.

The operation unit 31 includes a joystick 33 as a speaker operation unit, a storage switch 34, and a read switch 35. The joystick 33 is provided so as to be swingable in all directions around one end with respect to the housing 30. The joystick 33 is used to adjust the position of the speaker 5. The storage switch 34 is used to store the position of the speaker 5 when the speaker 5 is stopped. The read switch 35 is used to read the position of the speaker 5 stored by the storage switch 34. In the illustrated example, a plurality of switches 34 and 35 are provided, and the positions of the speakers 5 corresponding to the respective switches 34 and 35 are different.

The display unit 32 includes a display surface 36 such as a liquid crystal display, for example. The display unit 32 displays the relative position of the speaker 5 with respect to the door panel 2 on the display surface 36.

[0036] The transmitter transmits information on the operation of the joystick 33, the storage switch 34, and the read switch 35 to a receiver 42 (to be described later) connected to the control device 8 by force. The receiver receives information indicating the position of the speaker 5 with respect to the door panel from a transmitter 41, which will be described later, connected to the control device 8, and outputs the information to the display unit 32 by force.

[0037] When the joystick 33 is operated, the remote controller 7 described above outputs information corresponding to the operation of the joystick 33 to the control device 8 via the transmitter and the receiver 42. Specifically, the joystick 33 is tilted in the direction in which the speaker 5 is desired to be moved, and the direction in which the joystick 33 is tilted is output to the control device 8 by force. In this way, the remote control 7 When the joystick 33 is operated, the moving unit 6 is instructed to move the speaker 5 via the control device 8.

[0038] When the storage switch 34 is operated, the remote controller 7 outputs information indicating that the storage switch 34 has been operated to the control device 8 via the transmitter and the receiver 42. To do. Specifically, when the listener determines that the position of the speaker 5 is appropriate and stores the position of the speaker 5, the storage switch 34 described above is operated.

[0039] When the read switch 35 is operated, the remote controller 7 transmits information indicating that the read switch 35 has been operated to the control device 8 via the transmitter and the receiver 42. Output. Specifically, the position of the speaker 5 that the listener wants to read out is selected, and one of the reading switches 35 is operated. The remote controller 7 displays the relative position of the speaker 5 with respect to the door panel 2 output from the control device 8 via the transmitter 41 and the receiver on the display surface 36 of the display unit 32. As described above, the remote controller 7 includes the display unit 32 that displays the position of the speaker force 5 with respect to the door panel 2.

[0040] The control device 8 is attached to the inner surface of the panel body 3 of the door panel 2 described above! The control device 8 is a computer provided with a well-known RAM 37, ROM 38, EPROM 39 as storage means, and CPU 40 as control means, and includes the above-described moving unit 6, transmitter 41, and receiver 42. Etc., and control the entire speaker unit 1.

The ROM 38 stores an operation program of the CPU 40, that is, the speaker unit 1.

The RAM 37 temporarily holds data necessary when the CPU 40 executes the calculation.

[0042] The EPROM 39 is a known nonvolatile memory. The EPROM 39 stores audio information output from the speaker 5 when the CPU 40 controls the motors 12 and 22 to adjust the position of the speaker 5 as will be described later. For example, the EPROM 39 stores information corresponding to the voice “Pee” as the voice information described above. The audio information described above is output from the above-described force 5 when adjusting the relative position of the speaker 5 with respect to the door panel 2 as will be described later. In addition, the EPROM 39 has an area for storing information indicating the position of the speaker 5 for each of the storage switch 34 and the read switch 35 described above. In the EPROM 39, when the storage switch 34 corresponding to the above-described area is operated, information indicating the position of the speaker 5 at the time when the storage switch 34 is operated is displayed by the CPU 40. Is written.

The CPU 40 controls each of the motors 12 and 22 described above based on the operation program stored in the ROM 38, the command from the remote controller 7 and the detection results of the potentiometers 14 and 24 described above.

The CPU 40 proceeds to step S2 when the power of the speaker unit 1 is turned on in step S1 in FIG. 4 or the automobile ignition switch described above is turned on. In step S1, the speaker 5 is housed in the cover 4. The CPU 40 determines whether or not one of the plurality of read switches 35 has been operated in step S2. If it is determined that the read switch 35 has been operated, the process proceeds to step S3. If it is determined that the read switch 35 has not been operated, the process proceeds to step S4.

In step S3, the CPU 40 reads information indicating the position of the speaker 5 written in the aforementioned area of the EPRO M39 corresponding to the operated read switch 35. Then, the CPU 40 operates the motors 12 and 22 as described above to move the speaker 5 from the inside of the cover 4 to the outside of the cover 4 to the position as described above. Position and go to step S6. In this way, the CPU 40 positions the speaker 5 at a position relative to the door panel 2 when the speaker 5 stored in the EPR OM 39 outputs sound.

[0046] In step S4, the CPU 40 reads the audio information stored in the ROM 38 and supplies the audio current to the speaker 5 in accordance with the audio information. Then, the CPU 40 outputs the above-described audio information from the speaker 5 and proceeds to step S5.

[0047] In step S5, the CPU 40 determines whether or not the joystick 33 of the remote controller 7 is being operated. If it is determined that the joystick 33 on the remote control 7 is being operated, the process returns to step S4. If it is determined that the joystick 33 on the remote control 7 has not been operated, the process proceeds to step S6.

[0048] In this way, by repeating Step S4 and Step S5 until the joystick 33 is not operated, the speaker 5 can be positioned at a position desired by the listener. Further, the relative position of the speaker 5 with respect to the door panel 2 is displayed on the display unit 32 of the remote controller 7 described above. Furthermore, the CPU 40 is connected to the door panel 2 of the speaker 5. In order to adjust the relative position, the above-described audio information is output from the speaker 5.

[0049] In step S6, when the power of the speaker unit 1 is turned off or the above-described automobile ignition switch is turned off, the CPU 40 proceeds to step S7. At step S7, the CPU 40 controls the motors 12 and 22 described above to accommodate the speaker 5 in the cover 4. In this way, the CPU 40 causes the moving unit 6 to accommodate the spinning force 5 in the cover 4 when stopping outputting the sound from the speaker 5.

[0050] Further, when the storage switch 34 is operated between the step S5 and the step S6, the CPU 40 applies a force to the area of the EPROM 39 corresponding to the operated storage switch 34. Information indicating the position of is stored.

[0051] Next, the operation of the speaker unit 1 configured as described above will be described. First, the idling switch is turned on or the power of the speaker unit 1 is turned on. Then, when the listener operates the read switch 35 of the remote controller 7, the spinning force 5 is positioned at the position stored in the EPROM 39.

[0052] When the listener operates the joystick 33 of the remote controller 7, the sound information described above is output from the speaker 5, and the speaker 5 moves according to the operation of the joystick 33. The position of the speaker 5 at this time is displayed on the display unit 32 of the remote controller 7. In addition, the listener positions the speaker 5 at a position where the optimum sound quality can be obtained while listening to the above-described audio information. Then, the storage switch 34 is operated as necessary. Further, when the signal switch is turned on or the power of the speaker unit 1 is turned off, the spinning force 5 is accommodated in the cover 4.

[0053] According to the present embodiment, the relative position of the speaker 5 with respect to the door panel 2 can be changed, and the moving unit 6 that supports the speaker 5 with respect to the door panel 2 is provided to output sound. The speaker 5 can be positioned at a position where the sound quality is optimal. In this way, even when an obstacle is provided in front of the diaphragm of the speaker 5 when the sound is not output, the speaker 5 is positioned at a position where the sound quality is optimal when the sound is output. Speakers 5 installed indoors can also convey sufficient sound quality to listeners.

[0054] Further, since the moving unit 6 is provided with a remote controller 7 for instructing the moving direction of the speaker 5, The speaker 5 can be reliably positioned at the position desired by the user. That is, the speaker 5 can be positioned at a position where the sound quality of the sound from the speaker 5 is optimal while the listener listens to the sound from the force 5.

[0055] Further, since the remote controller 7 is provided with the display unit 32 for displaying the position of the speaker 5, the speaker 5 is desired even when the speaker 5 is placed so as to be hidden behind the door panel 2 or the like. It can be positioned reliably at the position.

[0056] Further, EPROM 39 for storing the relative position of speaker 5 with the optimum sound quality when outputting sound relative to door panel 2 and CPU 40 for positioning speaker 5 at the position stored in EPROM 39 for outputting sound. Therefore, the speaker 5 can be positioned at a position where the sound quality is optimal without increasing the operation of the listener.

[0057] Further, since the CPU 40 outputs the audio information stored in the EPROM 39 when adjusting the position of the speaker 5, the listener adjusts the position of the speech force 5 while listening to the audio information from the speaker 5. it can. Therefore, it is possible to position the speaker 5 at an optimal position more reliably.

[0058] Further, when the speaker 5 does not output sound, it is housed in the cover 4, so that the speaker 5 can be prevented from being damaged when not in use, and the speaker 5 can prevent the passenger from getting on and off the vehicle. Can be prevented.

[0059] In short, by adjusting the position of the speaker 5 with respect to the listening position (listening position) of the listener, it is optimal even when there is an obstacle between the speaker 5 and the listening position. Sound adjustment can be performed. Moreover, even if the listening position is changed by storing the adjusted position in the EPROM 39, it is possible to respond quickly by reading the stored position.

As shown in FIG. 5, a motor 43 may be provided between the second moving plate 25 of the moving unit 6 and the speaker 5 of the above-described embodiment. In FIG. 5, the same parts as those in the above-described embodiment are designated by the same reference numerals and the description thereof is omitted. The longitudinal direction of the output shaft of the motor 43 is orthogonal (crossed) to the longitudinal direction of the output shafts of the motors 12 and 22 described above. That is, the motor 43 rotates the speaker 5 around its axis.

[0061] Further, as shown in FIG. 6, the shaft core is inserted between the first moving plate 15 of the moving unit 6 and the door panel 2. A motor 44 orthogonal to (crossing) the surface of the panel 2 may be provided. In FIG. 6, the same parts as those in the above-described embodiment are denoted by the same reference numerals, and the description thereof is omitted. Without providing the motor 12 and the linear guide 11 of the first drive unit 9, the first moving plate 15 is rotated around the axis of the motor 44 described above. By doing so, the speaker 5 can be moved in the direction intersecting both the vertical direction and the horizontal direction by using the second drive unit 10, so that the speaker 5 can be positioned at more various positions.

Furthermore, in the above-described embodiment, the moving unit 6 includes both the first drive unit 9 and the second drive unit 10. However, in the present invention, it is sufficient if the moving unit 6 includes at least one of the first driving unit 9 and the second driving unit 10.

[0063] In the embodiment described above, the remote controller 7 is provided, and the speaker 5 is placed at a position desired by the listener. However, the speaker unit 1 of the present invention may be linked to a known automatic tone adjuster (auto equalizer) to position the speaker 5 at a position as instructed by the automatic tone adjuster.

[0064] Of course, the remote controller 7 described above may be wired. Instead of providing the remote control 7, the operation unit 31, the display unit 32, etc. may be provided in other electronic devices such as car audio. Further, in the present invention, the speaker units 1 may be installed in each of the plurality of door panels 2, and the speaker units 1 provided on the plurality of door panels 2 may be controlled by one control device 8.

Furthermore, in the embodiment described above, the speaker 5 is provided on the door panel 2. However, in the present invention, the present invention may be provided in various structures of the automobile without being limited to the door panel 2. Furthermore, in the present invention, the speaker 5 may be installed in a structure of another moving body such as a ship that is not limited to an automobile or a structure of a structure such as a karaoke box.

[0066] The remote control 7 described above may be provided with an accommodation switch used for accommodating the speaker 5 in the cover. In this case, when the accommodating switch is operated, the remote controller 7 described above sends information indicating that the accommodating switch has been operated to the control device 8 via the transmitter and the receiver 42. Output. Then, the CPU 40 of the control device 8 causes the moving unit 6 to accommodate the speaker 5 in the cover 4. Specifically, when the listener wants to house the speaker 5 in the cover 4 when getting on and off the automobile, the accommodation switch described above is operated. [0067] According to the embodiment described above, the following speaker unit 1 is obtained.

[0068] (Appendix) Speaker 5 installed on door panel 2,

A moving portion 6 that supports the spin force 5 movably with respect to the door panel 2 so that the relative position of the speaker 5 with respect to the door panel 2 can be changed;

1. A speaker unit comprising:

[0069] According to the supplementary notes, the speaker 5 can be changed in the relative position with respect to the door panel 2, and the moving unit 6 that supports the squeezing force 5 with respect to the door panel 2 is provided to output sound. The speaker 5 can be positioned at a position where the sound quality is optimal. In this way, even when an obstacle is provided in front of the diaphragm of the speaker 5 when the sound is not output, the speaker 5 is positioned at a position where the sound quality is optimal when the sound is output. Speakers 5 installed indoors can also convey sufficient sound quality to the listener.

[0070] It should be noted that the above-described embodiments are merely representative forms of the present invention, and the present invention is not limited to the embodiments. That is, various modifications can be made without departing from the scope of the present invention.

Claims

The scope of the claims

[1] A speaker installed in the structure;

A moving unit that supports the speaker so as to be movable with respect to the structure so that the relative position of the speaker with respect to the structure can be changed;

A speaker unit comprising:

2. The speaker unit according to claim 1, further comprising an operation unit for instructing the moving unit to move the speaker.

3. The speaker unit according to claim 2, wherein the operation unit includes a display unit that displays a position of the speaker with respect to the structure.

[4] a control unit that controls the moving unit;

The control unit includes a storage unit that stores a relative position with respect to the structure when the speaker outputs sound;

Control means for positioning the speaker at a position stored in the storage means when the speaker outputs sound;

5. The force unit according to claim 1, wherein the force unit includes any one of claims 1 and 4.

[5] The storage means stores audio information output from the speaker when adjusting a relative position of the speaker with respect to the structure.

5. The speech force unit according to claim 4, wherein the control means causes the speaker to output the audio information when adjusting a relative position of the speaker with respect to the structure.

[6] The claim 4 or claim, wherein the control unit causes the moving unit to house the speaker in a cover provided in the structure when stopping output of sound from the speaker. Item 5. The speaker unit according to item 5.