JP2008174977A - Driving device of sound reflecting board - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a driving device of a sound reflecting board capable of changing a sound field in a large degree of freedom, and capable of easily reproducing its sound field when a desirable sound field can be set once. <P>SOLUTION: A zigzag structure is formed by rotatably connecting a plurality of reflecting members 2, 2, etc. by alternately interposing a first connecting part and a second connecting part. The first connecting part is driven to be movable on the same straight line and individually movable in parallel on the same straight line. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an acoustic reflector, and more particularly, to a driving device for the acoustic reflector.

  Conventionally, fixed or variable acoustic reflectors have been used to improve the sound field of an audio room. When a fixed acoustic reflector is used in a listening room, the sound field can only be changed by changing the position of the acoustic reflector, and the degree of freedom for changing the sound field is limited. Become.

  The acoustic reflector that changes the variable reflection angle provides a great degree of freedom to change the sound field, but it is very difficult to change the reflection angle of each reflector while relying on the sense of hearing. Even if it was possible to set, it was not easy to reproduce it. In other words, the task of changing the reflection angle while relying on hearing is a task of setting the sound field by one person because the listening point and the place where the operation of changing the reflection angle of each variable reflector is separated. In addition, it is extremely difficult to make individual reflectors in the same state.

The acoustic reflector apparatus disclosed in Japanese Utility Model Publication No. 6-55199 can move the movable plate (reflector) to any position in the vertical direction, but only by changing the vertical height of the movable plate. Therefore, the sound field of facilities such as multipurpose halls and gymnasiums can be changed, but the reflection angle cannot be changed, so that the sound field of a listening room with a low ceiling cannot be changed with a large degree of freedom.
Japanese Utility Model Laid-Open No. 6-55199, paragraphs 0016 to 0031, FIGS. 1 to 3

  The present invention has been made in view of the above points, and the object of the present invention is to change the sound field with a large degree of freedom, and when a preferable sound field can be set once, it is easily achieved. An object of the present invention is to provide an acoustic reflector driving device that can be reproduced.

  The acoustic reflector driving device according to the present invention has a ninety-nine fold structure in which a plurality of reflecting members are rotatably connected by alternately interposing a first connecting portion and a second connecting portion. The connecting portion is movable so as to be movable on the same straight line and is individually driven to translate on the same straight line.

  Further, in the acoustic reflector driving device, a gear meshing with a fixed rack is fixed to a shaft supporting the first connecting portion, the shaft is guided so as to be linearly movable, and the shaft is driven to rotate. .

  Further, in the driving device for each acoustic reflector, the shaft supporting the first connecting portion is rotationally driven by the driving portion via a chain or a timing belt.

  In each of the acoustic reflector driving devices, the respective shafts that support the first connecting portion are rotationally driven by motors provided corresponding to the respective shafts.

  In each of the acoustic reflector driving devices, a sound field pattern arbitrarily selected by the user is transmitted to the acoustic measurement analyzer by a remote controller, and the acoustic measurement analyzer receives the received sound field pattern and the current reverberation time. To calculate the positions of the respective shafts supporting the first connecting portion to control the driving portion or the motor.

  According to the acoustic reflector driving device of the present invention, since the inclination angles and positions of all the individual reflecting members are determined only by determining the position of the first connecting portion on the straight line, the setting work of the sound field can be performed. It's easy and you can do it alone. And it becomes easy to reproduce the same sound field.

  The best mode for carrying out the present invention will be described below with reference to examples.

  FIG. 1A is a side view showing a schematic configuration of an acoustic reflector that is Embodiment 1 of the present invention, FIG. 1B is a side view showing a schematic configuration of another state of the acoustic reflector, and FIG. FIG. 3 is a front view showing a portion of the acoustic reflector, FIG. 3 is a front view showing the portion of the acoustic reflector, and FIG. 4 is a side view showing the portion of the acoustic reflector.

  1 (a) and 1 (b), a plastic reflecting member 2, 2... Is bent and connected by hinges 5, 5... Shown in FIG. Are alternately connected to the left first connecting portion and the reflecting members 2, 2... Are connected to each other by hinges 5, 5. It has a ninety-nine fold structure reflecting part.

  The shafts 3, 3... That support the first connecting portion are supported so as to be movable in the vertical direction in FIG. 1 by inserting the guide grooves 7a of the guide portion 7 shown in FIG. In FIG. 2, only one guide portion 7 is shown, but the same shape is provided on both sides of the reflecting members 2, 2.

  Each of the axes 3, 3... Is individually driven, and when the position of each of the axes 3, 3... Is determined, the shape of the reflecting portion (the inclination angle of each reflecting member 2, 2...) Is uniquely determined. . The acoustic reflector 1 is disposed so that the side opposite to the reflecting members 2, 2... Faces the wall or ceiling of the listening room.

  Next, the support structure for the first connecting portion will be described with reference to FIGS. As described above, the shaft 3 shown in FIG. 2 is guided by the guide groove 7a provided in the guide portion 7, and the gear 4 fixed to the shaft 3 meshes with the fixed racks 8 attached to the guide portions 7 on both sides. ing. The gears 4, 4 fixed to both sides of the shaft 3 mesh with the fixed racks 8, 8 in synchronization.

  As shown in FIG. 4, the reflecting members 2, 2... Are pivotally connected by hinges 5, 5... To thereby form a first connecting part that forms a left trough and a second that forms a right peak. Are formed. As shown in FIGS. 3 and 4, the shaft fitting portions 6, 6... Are fixed in the vicinity of the first connecting portions of the reflecting members 2, 2. The shafts 3, 3,... Are rotatably inserted.

  In FIG. 3, the gears 4, 4... Fixed to the shafts 3, 3 are omitted, but the gears 4, 4... Are fixed to the gear fixing portions 3 a, 3 a. ing. The chains 9, 9... Shown in FIG. 3 are engaged with the upper half of the sprockets fixed to the respective shafts 3, 3,. Is wound and unwound by a winding / rewinding mechanism provided in

  In this way, the shafts 3, 3,... Are independently driven to rotate, and the vertical positions of the shafts 3, 3,. In this manner, the positions of the two pairs of reflecting members 2 and 2 and the first connecting portion thereof are set by the driving unit 10, and the shape and position of the triangle formed by these are determined. That is, by controlling the drive unit 10, the inclination angles and positions of the individual reflecting members 2, 2... Of the acoustic reflector 1 can be determined, and the sound field of the listening point can be set.

  The user is at the listening point and sets a sound field pattern in the acoustic analysis unit 11 from the remote controller 12 by infrared rays. And the acoustic analysis part 11 calculates the position of each axis | shaft 3, 3, ... to set, controls the drive part 10, and sets a sound field pattern. The sound field patterns are recorded in a numerical order of those that change little by little, and the user can easily set a favorite sound field while listening to the sound.

  Note that the sound field pattern is set by the reverberation time or the like, and the acoustic analysis unit 11 calculates the distance between the axes from the difference between the reverberation time of the set sound field pattern and the current reverberation time, and the driving unit 10. You may make it control control.

  FIG. 5 is a side view showing a portion of an acoustic reflector that is Embodiment 2 of the present invention. In this example, the laminate film 13 is attached to the side of the acoustic reflection surface of the reflection members 2, 2... So as to provide a gap in the portion of the reflection members 2, 2. A first connecting portion and a second connecting portion are formed by the laminate film 13.

  Any material can be used as long as it is flexible and suitable for sound reflection, such as a cloth having a metal mesh attached to a cloth instead of a laminate film. In this example, since many hinges are not used, the manufacturing cost is reduced. A material having good acoustic reflection characteristics can be selected as the material of the laminate film or the like. Other configurations are the same as those of the first embodiment.

  The embodiment is configured as described above, but the invention is not limited to this. For example, a scale for displaying the position of the first connecting portion may be provided, and the first connecting portion may be moved manually. The effect is obtained.

FIG. 1A is a side view showing a schematic configuration of an acoustic reflector that is Embodiment 1 of the present invention, and FIG. 1B is a side view showing a schematic configuration of another state of the acoustic reflector. It is a side view which shows the part of the acoustic reflection board. It is a front view which shows the part of the acoustic reflection board. It is a side view which shows the part of the acoustic reflection board. It is a side view which shows the part of the acoustic reflector which is Example 2 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Acoustic reflector 2 Reflective member 3 Axis, 3a Gear fixed part 4 Gear 5 Hinge 6 Shaft fitting member 7 Guide member, 7a Guide groove 8 Fixed rack 9 Chain 10 Drive part 11 Acoustic measurement analyzer 12 Remote controller 13 Laminate film

Claims (5)

A plurality of reflecting members are alternately connected with the first connecting portion and the second connecting portion so as to be pivotably connected to form a ninety-nine fold structure, and the first connecting portion can be moved on the same straight line. And a driving device for the acoustic reflector that is individually driven to translate on the same straight line. 2. The acoustic reflector driving device according to claim 1, wherein a gear that meshes with a fixed rack is fixed to a shaft that supports the first connecting portion, the shaft is guided so as to be linearly movable, and the shaft is driven to rotate. 3. The acoustic reflector driving device according to claim 1, wherein the shaft supporting the first connecting portion is rotationally driven by a driving portion via a chain or a timing belt. 3. The acoustic reflector driving device according to claim 1, wherein each of the shafts supporting the first connecting portion is rotationally driven by a motor provided corresponding to each of the shafts. A sound field pattern arbitrarily selected by a user is transmitted to an acoustic measurement analyzer by a remote controller, and the acoustic measurement analyzer supports each of the first connection parts from the received sound field pattern and the current reverberation time. 5. The acoustic reflector driving device according to claim 3, wherein the driving unit or the motor is controlled by calculating a position of an axis.

Images