JP2003023686A - Reflection board mounting device and its mount method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reflection board mounting device that can be downsized, through setting of the shape of which the sound directivity characteristic can simply be controlled and cause no sound leakage from its rear side and to provide its mounting method. SOLUTION: Reflection boards 8L, 8R are pivotally and removably fitted to rear plates 7L, 7R of speaker systems 10L, 10R having speaker openings 4L, 4R toward the rear face.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting device and a mounting method for a reflector plate mounted on a speaker device such as a speaker cabinet, and more particularly to a reflector plate for a speaker device in which a speaker opening is provided obliquely rearward. A mounting device and a mounting method thereof.

[0002]

2. Description of the Related Art As shown in FIG. 7, a speaker cabinet such as a stereo that has been widely used in the past has left and right speakers 2L and 2R built in left and right speaker cabinets 1L and 1R arranged in front of a listener 3. The left and right openings 4L and 4R formed on the baffle board side of the left and right speaker cabinets 1L and 1R are arranged so as to face the listener 3.

Therefore, when the L sound, which is the same sound as the L sound entering the left ear 5L of the listener 3 from the left speaker 2L, is slightly delayed and then enters the right ear 5R, the same sound L'is entered.
The R sound emitted from the right ear 2R enters the right ear 5R close to the right speaker 2R, and then the left ear 5L is delayed by a predetermined amount to generate R '.
The sound reaches. Therefore, the listener 3 having a path that fuses the hearing of both ears feels the localization point 6 of the sound sources L and R forward. Therefore, the sense of localization of the sound source is relatively excellent.

[0004]

As described above, since the openings 4L, 4R of the left and right speakers 2L, 2R of the left and right speaker cabinets 1L, 1R directly face the listener 3, the listener 3 feels pressure. And the localization point 6 of the sound image is located in front of the middle position between the left and right speaker cabinets 1L and 1R and the listener 3, so that there is a problem that it is difficult to feel a sense of spaciousness.

In order to solve the above problems, the left and right speakers 2 built in the left and right speaker cabinets 1L and 1R.
L and 2R are arranged diagonally rearward, and a reflector is fixedly arranged behind the left and right speaker cabinets to devise a speaker device configured to reflect middle and high-range sounds forward. However, various problems as described in the following items occurred. (B) The size of the speaker device cannot be reduced by adding the reflector. (B) It is not easy to change the sound spread characteristics of the reflector. (C) Sound leakage occurs from the back plates of the left and right speaker cabinets. (D) The packing container of the speaker device becomes large.

The present invention has been made in order to solve the above problems, and the problem to be solved by the present invention is miniaturization, and the directivity of sound can be easily controlled by setting the shape of the reflector. The present invention provides a reflector mounting device and a reflector mounting method that prevent sound leakage from the back surface.

[0007]

The present invention according to claim 1 attaches to and detaches from the rear plates 7L and 7R of speaker devices 10L and 10R having openings 4L and 4R of the speakers 2L and 2R toward the rear side at least. This is a reflecting plate mounting device characterized in that the reflecting plates 8L and 8R are freely pivoted.

The present invention according to claim 2 is directed to a speaker device 1
Mounting part 9 provided on the back plate 7L, 7R side of 0L, 10R
L, 9R and reflectors 8L, 8R mounting portions 11L, 11R
The reflector mounting device according to claim 1, wherein the reflectors (8L, 8R) are pivotally attached to each other via joining members (12L, 12R) made of a detachable elastic material.

The present invention according to claim 3 is directed to the joining member 12
L, 12R reflectors 8L, 8R mounting portions 11L, 11R
3. The reflection plate mounting device according to claim 2, wherein a sound leakage preventing flange portion 13 is provided on the inner surface.

The present invention according to claim 4 relates to reflectors 8L and 8L.
The reflector mounting device according to any one of claims 1 to 3, wherein the shape of R is a flat plate or a curved plate.

The present invention according to claim 5 is concerned with the reflectors 8L and 8L.
5. The light emitting element 14 is brought into contact with R so that light is emitted from at least the peripheral portions of the reflection plates 8L and 8R, and the reflection plate mounting device according to claim 1 to 4. Is.

According to a sixth aspect of the present invention, the reflector plates 8L, 7D are detachably attached to the rear plates 7L, 7R of the speaker devices 10L, 10R having the openings 4L, 4R of the speakers 2L, 2R toward the rear side. 8R is pivotally attached to the reflecting plate.

The present invention according to claim 7 is the reflector 8L, 8
R is formed into a curved plate shape, and when the curved plate-shaped reflectors 8L and 8R are pivotally attached to the rear plates 7L and 7R, the speaker devices 10L and 10L are attached.
7. The method of mounting a reflector according to claim 6, wherein the spreading effect is controlled by pivotally attaching the concave or convex shape as viewed from the front side of R.

According to the reflector mounting device and the mounting method thereof of the present invention, the speaker device can be miniaturized, and the directivity of the sound can be easily controlled by the shape setting of the reflector, and the sound leakage from the rear surface. It is possible to provide a reflector mounting device and a reflector mounting method that do not have a reflector.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION A mounting device for a reflector to a speaker cabinet showing one embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 is a perspective view showing one embodiment of a speaker system to which a device for attaching a reflector to a cabinet of the present invention is applied.

In FIG. 1, left and right speaker cabinets 1
Speaker devices 10L and 10R composed of L and 1R and left and right reflectors 8L and 8R are connected to personal computers (hereinafter referred to as CPUs).
The left and right speaker devices 10L and 10R arranged on the left and right sides of the notebook CPU 14 direct the acoustic signals captured by the CPU 14 to the diagonal rear of the left and right speaker cabinets 1L and 1R. , The left and right speakers 2L and 2R that are opened are emitted from the openings 4L and 4R having the built-in left and right speakers 8L and 8R toward the left and right reflectors 8L and 8R. It is configured to radiate via 8R.

The CPU 14 is provided with a display device 15 such as an LCD (liquid crystal display device) for capturing and displaying a video signal as usual, and an operation unit 16 such as a keyboard and a mouse.

In the speaker devices 10L and 10R of this example, the LED 1 for displaying the operator status is provided on the front plate side of the left speaker cabinet 1L which constitutes the left speaker device 10L.
7. Power “on” and “off” switch 18, volume, base, variable resistor (VR) for input switching 19, 20, 2
1 and a horn jack 22 and the like are sequentially arranged, and various kinds of knobs are arranged at positions where a listener can easily adjust when listening to a voice signal or an acoustic signal.

2A and 2B are a side view and a rear view of the above left and right speaker devices 2L and 2R.

With reference to FIG. 2, a specific configuration of the left and right speaker devices 10L and 10R of the present invention will be described. First, the left and right speaker cabinets 1L and 1R have a substantially U-shaped cross section and have left and right side plates 23 and 24, a front plate 25, a bottom plate 26, and a top plate 27.
The front plate 25 has a substantially rectangular shape of, for example, 25 mm × 145 mm, the upper plate 27 has a substantially trapezoidal shape with a bottom side of 35 mm, an upper side of 25 mm, and a height of about 10 mm. The front plate 25 has a substantially triangular shape having a base angle of 45 mm with the short side cut by 25 mm and the other two sides of about 65 mm, and the left and right side plates 23, 24 have a divergent shape with a predetermined curvature from the front surface toward the rear. Depth distance 65m
The height direction is a predetermined angle α °, as shown in FIG. 2A, for example, a structure tilted backward by about 10 °,
The upper edges of the left and right side plates 23, 24 are inclined downward from the rear side of the upper side plate 27 by a predetermined angle β ° and the rear side plate 7L (7
The angle formed by the perpendicular line standing perpendicular to the end of R) is 45 °.

On the other hand, the rear plates 7L and 7R are 95 mm × 55.
The rear plates 7L and 7R are formed in a substantially rectangular shape of about mm.
Two attachment portions 9L (9R) for pivotally mounting the left and right reflection plates 8L and 8R are integrally formed with the back plates 7L and 7R on the upper side of the.

Reference numeral 30 designates a vent hole constituting a phase inversion baffle, 31 designates an input terminal for an acoustic signal from the CPU 14, etc., and the vent hole 30 and the input terminal 31 are also the rear plate 7.
It is made of synthetic resin integrally with L and 7R.

The two mounting portions 9L (9R) integrally formed on the rear plates 7L and 7R have an elliptic cylindrical boss protruding as shown in FIGS. 2 (B), 3 and 4. Elliptical holes 35 (see FIG. 4) are also formed in the back plates 7L and 7R at the cylindrical ends.

The baffle plate 29 is formed into a substantially trapezoidal shape when viewed from the front, as is apparent from FIGS. 2 (A), (B) and FIG. 3, and the trapezoidal inclined portion has a curvature having an outward bulge, The base of the trapezoid is 55 mm, which is the same as the short sides of the back plates 7L and 7R,
The top side of the trapezoid is selected to be 35 mm, which is the same as the bottom side of the top plate 27, and the height is about 65 mm. The trapezoid is molded integrally with the back plates 7L and 7R with synthetic resin, and the cross section is bent into a V shape. As shown in FIG. 2 (A), the base 32 placed on a horizontal surface such as a desk is tilted in a direction inclined by 45 ° with respect to a vertical line perpendicular to the base 32.

A through hole 33 for the left and right speakers 2L and 2R is formed in the baffle plate 29 at a substantially central position of the trapezoidal portion, and a dome-shaped guard 34 is formed integrally with the baffle plate 29 so as to cover the through hole 33. The left and right speakers 2L (2R) are fixed inside the baffle plate 29 so as to face the through hole 33. Such a baffle plate 29 having a substantially V-shaped cross section and the back plates 7L and 7R are fixed to a substantially box-shaped housing composed of the left and right side plates 23 and 24, the bottom plate 26, and the top plate 27 via screws or the like. . Further, the base 32 is also fixed to the bottom plate 26 of the housing to form the left and right speaker cabinets 1L and 1R.

Of course, in the left speaker cabinet 1L, the LED 17, various variable resistors (VR) 19, 20,
21, a horn jack 22, and the like, and a preamplifier for driving and controlling, and a driving and control circuit.

The right speaker cabinet 2R does not have various operation knobs or LEDs on the front plate 25 as shown in FIG.

The above left and right speaker cabinets 1L, 1
A method of mounting the R and the reflectors 8L and 8R will be described with reference to FIGS.

In FIG. 3, the reflection plate 8L (8R) is a rectangular transparent synthetic resin having a thickness of 2 mm and a size of about 95 mm × 70 mm, and is embossed to form a flat plate or a convex shape having a predetermined curvature. To do. Further, the mounting portions 11L and 11R of the reflecting plates 8L and 8R having the same dimensions as those between the two mounting portions 9L and 9R of the back plates 7L and 7R are formed below the reflecting plates 8L and 8R. The mounting portions 11L and 11R may be elliptical through holes 37 formed below the reflection plates 8L and 8R. Incidentally, FIG.
Reference numeral 36 denotes a small circle which is not embossed and is a small circle in this example, but an appropriate pattern can be selected, and this portion is a transparent portion.

Next, the reflectors 8L and 8R are attached to each of FIGS.
As shown in (A), the joining members 12L and 12 to be joined to the mounting portion 9L (9R) of the speaker cabinet 1L (1R)
R and its bonding method will be described.

The joining members 12L and 12R are made of synthetic rubber, natural rubber or the like having elasticity and cushioning properties, as shown in FIG. That is, the front surface is formed with a substantially elliptical retaining portion 38, and also serves as a buffer portion when the reflecting plate 8L (8R) falls from the mounting portion 9L (9R).

Following this stopper portion 38, the reflection plate 8L (8
R) so that it fits into the elliptical through hole 37 formed in R).
In order to sandwich the fitting portion 39 formed in an elliptical shape having a thickness t (for example, t = 2 mm) of L and 8R and the reflection plates 8L and 8R subsequent to the fitting portion 39, the retaining portion 38. Oval flange 13 and speaker cabinet 1
From the elliptical hole 35 formed in the rear plate 7L (7R), the rear plate 7L (7R) of L, 1R has an elliptical shape that is press-fitted into the elliptic cylinder of the mounting portion 9L, 9R and is tapered toward the distal end. A press-fitting portion 40 for preventing sound leakage of the flange 13 together with the flange portion 13,
Neck portion 41 having an elliptical cross section fitted into the elliptical hole 35 formed in the back plates 7L and 7R, and the elliptical hole 3 formed in the back plates 7L and 7R.
The hook portion 42 that is press-fitted while being deformed into 5 is integrally formed, and the slidable portion 43 for imparting elasticity is formed in the direction from the hook portion 42 to the fitting portion 39.

Such joining members 12L and 12R are shown in FIG.
As seen from the front plate 25 side of the left and right speaker devices 10L and 10R, the curvatures of the reflection plates 8L and 8R are directed inward (hereinafter referred to as concave type), and the through holes 37 of the reflection plates 8L and 8R are formed.
Insert the two joining members 12L and 12R into the fitting portion 3
When the joining members 12L and 12R are inserted into the elliptic cylinders of the mounting portions 9L and 9R of the speaker cabinets 1L and 1R together with the reflecting plates 8L and 8R to the press-fitting portion 40 by being fitted to the press fitting portion 9, the front end portion 42 is bent and the rear plate is bent. 7L and 7R are press-fitted into the elliptical holes 35 and fitted into the neck 41 as shown in FIG. 4, the tip 42 opens up and down, hooks into the elliptical holes 35, and pulls out the reflectors 8L and 8R. Even if it does not come off easily, the reflector 8
L and 8R are prevented from falling off. In addition, the sound leakage from the speaker cabinets 1L and 1R is caused by the flange portion 13 and the press-fitting portion 4.
It can be completely closed with 0, and when the reflector plates 8L, 8R are overloaded, such as when the speaker cabinets 1L, 1R fall, the reflector plates 8L, 8R will fall off the speaker cabinets 1L, 1R. The destruction of the reflection plates 8L and 8R is prevented.

According to the method of mounting the reflectors 8L and 8R, the reflectors 8L and 8R are attached to the front plate 2 of the speaker devices 10L and 10R.
Reflecting plate 8 shown in the right side of FIG.
In the direction in which the curved surface faces outward like L'and 8R '(hereinafter referred to as convex shape), the joining member 30 is attached to the through holes 3 of the reflectors 8L' and 8R '.
It may be inserted into the inside of the speaker cabinet 7 and inserted into the mounting portions 9L and 9R of the speaker cabinets 1L and 1R by pressure.

FIG. 6 schematically shows the sound spread when the reflectors 8L and 8R are concave and the reflectors 8L 'and 8R' are convex, as shown in FIGS. 6A and 6B. When the concave portion is concave or convex, the localization point 6 of the sound image is localized farther from the listener 3 as compared with a stereo system in which the openings 4L and 4R of the speakers 1L and 1R shown in FIG. An acoustic signal with a sense of depth can be obtained. If the concave reflectors 8L and 8R are turned to be convex, the reflectors 8L 'and 8L' are different from the concave reflectors 8L and 8R as shown in FIG. 6B.
There is an effect that the sound image reflected by R'can be easily spread.

In FIG. 5, the tip of the light emitting element 44 such as an LED is passed through the elliptical holes 35 of the mounting portions 4L and 4R provided on the rear plates 7L and 7R of the speaker cabinets 1L and 1R shown in FIG. , 8R are formed so as to be in contact with each other inside the hole 47, and in this case, the joining member 12L,
Although the structure in which a part of 12R is removed is shown,
The light emitting element 44 may be led out from a through hole formed at a predetermined position of the back plate 7L, 7R so that the tip of the light emitting element 44 contacts the L, 12R. In this case, bushings may be interposed so that sound does not leak from the through holes formed in the back plates 7L and 7R. Further, the light emitting element 44 may be led out through the passage hole 30 for phase inversion.

In this way, the light emitting element 44 is connected to the reflection plates 8L and 8L.
The peripheral portions of the reflectors 8L, 8R, 8L ', 8R' can be illuminated in a predetermined color by bringing them into contact with R, 8L ', 8R' and lighting them. Further, it is possible to make the pattern other than the embossed portion shine.

[0039]

According to the present invention, downsizing can be achieved, the directivity of sound can be easily controlled by setting the shape of the reflector, and a reflector mounting device and a reflector mounting method in which no sound leaks from the back surface. Is obtained.

[Brief description of drawings]

FIG. 1 is a perspective view showing one form example of a speaker system of the present invention.

FIG. 2 is a side view and a rear view of a speaker device used in the present invention.

FIG. 3 is a perspective view illustrating a method of attaching the reflection plate attaching apparatus of the present invention.

FIG. 4 is a side sectional view of a joining member showing one example of a mounting state of a reflection plate of the present invention.

FIG. 5 is a cross-sectional view of a joint portion showing another example of a mounting state of the reflector of the present invention.

FIG. 6 is a schematic diagram showing a change in sound image due to a difference in mounting form of a reflector of the present invention.

FIG. 7 is a schematic diagram for explaining localization of a sound image of a conventional speaker system.

[Explanation of symbols]

1L, 1R ... Left and right speaker cabinets, 2L, 2R
Left and right speakers, 4L, 4R ... Opening, 7L, 7R
Back plate, 8L, 8R, 8L ', 8R' ... Reflector,
9L, 9R ... Attachment part of speaker cabinet, 11
L, 11R ... Reflector mounting part, 12L, 12R ... Joining member, 14 ... Computer

Claims (7)

[Claims] 1. An apparatus for mounting a reflection plate, wherein a reflection plate is removably pivotally attached to a rear plate side of a speaker device having a speaker opening portion toward at least a rear side. 2. The reflection plate is pivotally attached to a mounting portion provided on the rear plate side of the speaker device and a mounting portion of the reflection plate via a detachable joint member made of an elastic material. The reflector mounting device according to claim 1. 3. The reflection plate mounting apparatus according to claim 2, wherein a sound leakage preventing flange is provided on the mounting portion of the reflection plate of the joining member. 4. The mounting device for a reflector according to claim 1, wherein the reflector has a flat plate shape or a curved plate shape. 5. The mounting of a reflecting plate according to claim 1, wherein a light emitting element is brought into contact with the reflecting plate so that light is emitted from at least a peripheral portion of the reflecting plate. apparatus. 6. A method of mounting a reflector plate, wherein a reflector plate is detachably attached to a rear plate side of a speaker device having a speaker opening portion toward at least the rear face side. 7. The reflection plate is formed in a curved plate shape, and when the curved reflection plate is pivotally attached to the back plate, the reflection plate is made to be concave or convex when viewed from the front side of the speaker device. 7. The method for mounting a reflector according to claim 6, wherein the spreading effect is controlled thereby.