JPH0888891A - Directional speaker and directional reflecting plate for directional speaker - Google Patents

Abstract

PURPOSE: To facilitate the transferring installation for a directional speaker and to widen the application area of the directional speaker. CONSTITUTION: This is a speaker where a speaker unit is provided inside a roughly semispherical directional reflecting plate 11. The speaker is made a directional speaker where the speaker unit is supported by mounting a planar support plate 30 at the inside and the outside of the directional reflecting plate 11, holding the directional reflecting plate 11 with the support plate 30, defining the support plate 30 fixed at the outside of the directional reflecting plate 11 as an external support plate 35, mounting a support part on this external support plate 35, defining the support plate 30 fixed at the inside of the directional reflecting plate 11 as an internal support plate 36 and mounting a support bar 55 on this internal support plate 36.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a directional speaker that allows one or several people to hear a sound in a limited range without leaking the sound to the surroundings.

[0002]

2. Description of the Related Art Today, there has been proposed a speaker which allows sound from a specific speaker to be heard only in a part of a wide space, and the speaker has a parabolic curve or a spheroidal curve. There is a method in which a directivity is given to a sound emitted from a speaker by using a reflective directivity plate having a curved surface forming a curve (for example, Japanese Patent Laid-Open No. 2-87797).
JP-A-3-128597, JP-A-5-20758
No. 4).

Since this directional speaker allows the sound from the speaker to be heard only directly below the speaker without dividing the room, the directional speaker should stand in the area immediately before each exhibit, for example, in an exhibition hall. The explanation of the exhibit can be heard without using a device such as an earphone, and even when broadcasting different contents in one room, by standing in a predetermined position, only the target sound can be heard. You can hear it clearly.

[0004]

As described above, a directional speaker using a reflective directional plate that forms a parabolic curve or a spheroidal curve allows the sound to be clearly heard only at a predetermined position. Therefore, it is possible to arrange multiple directional speakers in the room to broadcast different sounds and clearly transmit multiple pieces of information with different contents. However, the diameter of the opening is as large as 1 m to several m, which makes it difficult to install.

In addition, this speaker limits the number of people who can hear with one speaker to one or several people, and usually a plurality of speakers are installed in one room so that different sounds can be emitted from each speaker. Therefore, it is often desirable to install a plurality of speakers in a limited space, and it is particularly desirable to make it easy to install individual speakers, and in general, they should be hung so that you can hear the sound just below the speakers. Many,
It is also desired to be lightweight.

[0006]

DISCLOSURE OF THE INVENTION The present invention relates to a speaker in which a speaker unit is provided inside a reflection hemisphere having a substantially hemispherical shape. In the speaker, a plate-like support plate is provided inside and outside the reflection helix along the curved surface of the reflection helix. The outer and inner support plates are fixed so as to sandwich the reflection direction plate, and the directional speaker support is attached to the outer support plate fixed to the outside of the reflection direction plate, and the inside fixed to the inside of the reflection direction plate. A support rod is attached to the support plate to support the speaker unit inside the reflection directing plate.

The reflection-directing plate may have an annular reinforcing portion formed at the lower end. Further, when the speaker unit is supported by the support rod, the speaker unit may be accommodated inside the sounding body storage portion with the support rod supported upward. A lighting device may be housed inside the sounding body housing.

Further, when the lighting device is stored in the sounding body storage portion, a slide plate or a liquid crystal projector may be arranged below the lighting device, or a slide plate may be arranged beside the lighting device. Further, the reflection directing plate of this directional speaker is formed by a bowl-shaped upper reflecting portion forming a part of a spherical surface and an annular lower reflecting portion having a spherical shape having a curvature continuous with the curvature of the upper reflecting portion. However, the upper reflection part and the lower reflection part may be detachable so that the reflection directing plate can be divided into two parts.

[0009]

[Operation] Since the present invention is a speaker that supports a speaker unit inside a reflection-directing plate having a substantially hemispherical shape,
The sound from the speaker unit can be reflected toward a specific range by the reflection directing plate, and the reflection directing plate is sandwiched between the outer supporting plate and the inner supporting plate, and the supporting part is attached to the outer supporting plate to attach the reflection directing plate. Therefore, the reflection directing plate can be supported by the plate-shaped outer supporting plate and the inner supporting plate, and the reflection directing plate can be supported without applying an excessive force to the local part of the reflection directing plate. Further, since the speaker unit is supported by the inner support plate, the speaker unit can be hung while the force applied to the inner support plate is supported by the outer support plate without adding the weight of the sounding body housing to the reflection direction plate. It is also possible to eliminate the need to give unnecessary intensity to the reflection directing plate.

When the annular reinforcing portion is formed at the lower end of the hemispherical radiation plate, the reflection direction plate can be made light and thin while preventing the strength of the reflection direction plate from decreasing. Further, if the speaker unit is housed in the sounding body housing and supported by the support rod inside the reflection directing plate, not only the speaker unit itself but also other devices may be combined with the speaker unit to be installed inside the directional speaker. When the lighting device is housed in the lower part of the sounding body housing part, the spot lighting can clearly indicate the range in which the sound from the directional speaker can be opened well.

When a slide plate or a liquid crystal projector is arranged below the illuminating device, patterns or characters can be projected on the floor when illuminating the audible range with the slide plate or the like. It is also possible to add motion to a pattern or the like, and when a slide plate is arranged on the side of the lighting device, the slide plate can project the pattern or characters on the reflection directing plate.

Furthermore, the reflection directing plate, which is detachable by separating the reflection directing plate into an upper reflecting part and a lower reflecting part, is small in size for convenient transportation, and a lower reflecting part having a different pattern or Replacing the lower reflective part with different material,
Further, it is possible to easily perform conversion to a lower reflection part having a different size and curvature as a reflection directing plate.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, the embodiment of the present invention is such that a speaker unit 42 is provided inside a reflection directing plate 11 having a substantially hemispherical shape.
Directional speaker 10 in which the sounding body storage unit 41 storing the
And, for example, three wires 24 with wire support hooks
The reflection directing plate 11 is hung from a wire fixture 23 provided with 22 and is suspended by a wire 24 as a support part and a suspension support part 21 by the wire fixture 23.

When fixing the wire 24 of the suspension supporting portion 21 to the reflection directing plate 11, as shown in FIG. 2, a supporting plate 30 having a plate-shaped main body portion 31 and a mounting portion 33 is used. As shown, two support plates 30 sandwich a predetermined position of the reflection directing plate 11 so that a screw 26 is passed through a through hole 32 of the support plate main body 31 and a nut 27 is provided inside and outside the reflection directing plate 11. The support plate 30 fixed to the reflection direction plate 11 is referred to as an external support plate 35, and the support plate 30 provided inside the reflection direction plate 11 is referred to as an inner support plate 36.

The main body 31 of the support plate 30 is a reflection directing plate 11.
Although it has a slightly curved plate shape in accordance with the curvature of, when the diameter of the reflection directing plate 11 is larger than that of the support plate body 31, even if the reflection directing plate 11 has a simple flat plate shape, It can be used as a shape that fits a curved surface. Then, the end of the wire 24 of the suspension support portion 21 is fixed to the attachment hole 34 of the external support plate 35, and the attachment position of each support plate 30 to the reflection directivity plate 11 is the center of the reflection directivity plate 11. By equidistantly from each other and arranging all the distances between the external support plates 35 to be equal to each other, the reflection directing plate 11 can be easily stabilized and suspended by the wires 24 having the same length.

Further, the ends of the support rods 55 are screwed into the mounting holes 34 of the inner support plate 36, and as shown in FIG. As shown in FIG. 4, the speaker unit 42 is mounted inside and the speaker unit 42 facing upward is housed inside the speaker housing unit 41, and the speaker unit 42 is provided with the speaker unit 42 facing the center of the reflection directing plate 11. Is to support.

As described above, in the present embodiment, the plate-shaped inner support plate 36 and the outer support plate 35 are screwed together, and the outer support plate 35 is supported by the wire 24.
When supporting the reflection directing plate 11 with the
By using one sheet so as to sandwich the inside and outside of the reflection directing plate 11, the force is not concentrated on the local part of the reflection directing plate 11, the reflection directing plate 11 can be made thin and lightweight, and the sounding body storage portion 41 is provided. The inner support plate 36 is connected by a support rod 55, the inner support plate 36 and the outer support plate 35 are screwed together, and the outer support plate 35 is connected to the wire 24.
Therefore, the load due to the weight of the sounding body storage section 41 is applied to the wire 24 from the inner support plate 36 through the outer support plate 35, and the weight of the sounding body storage section 41 is added to the reflection directing plate 11. It can also reduce the reflection direction plate
11 can be made thinner and lighter.

The reflection directing plate 11 can be easily molded by using a synthetic resin such as acrylic resin. If the reflection directing plate 11 is transparent or translucent, the diameter thereof is 1 m or 2 or 3 m. Reflective directional plate 11
Even with the directional speaker 10 arranged above the head, it is possible to prevent the person who hears the sound from feeling a sense of oppression. Further, as shown in FIG. 5, it is possible to visually entertain by eliminating the feeling of intimidation by making it a stained glass shape, and it is possible to further increase the visual enjoyment by combining with ceiling lighting.

Further, when a light feeling is given by a sticker or paint, or the speaker unit 42 is used.
Depending on the contents of the broadcast broadcast from, you may also use such as painting a pattern for advertising or publicity. Then, as shown in FIG. 6, at the end of the reflection directing plate 11,
A U-shaped angle made of aluminum may be an annular shape that matches the diameter of the reflection direction plate 11, and this angle may be attached to the end of the reflection direction plate 11 as an annular reinforcing portion 19.
By making the end of the reflection directing plate 11 thick, an annular reinforcing portion
19 may be formed to increase the strength of the reflection directing plate 11.

The reflection directing plate 11 is not limited to a synthetic resin, but may be formed of a thin plate of a light alloy such as aluminum or stainless steel. It may be a plate 11. Further, as shown in FIG. 7, the sounding body storage portion 41 has a smooth curved surface shape having an opening at the upper end of the sounding body storage portion 41 and having a substantially cylindrical shape on the upper side and a substantially conical shape on the lower side. Bullet shape,
The sound output from the speaker unit 42 is output from the opening to the reflection directing plate 11, and the sound reflected by the reflection directing plate 11 is a smooth curved surface so as not to be disturbed around the sounding body storage part 41. And has a cylindrical shape.

Further, as shown in FIG.
The lighting device 46 is housed inside the lower part of the speaker, and the vicinity of the tip of the sounding body housing portion 41 is a removable tip cover 45. Sometimes it can be illuminated by 46. As described above, when the lower side of the directional speaker 10 is illuminated, there is an advantage that the area where the sound from the directional speaker 10 can be heard can be easily specified.

Further, as shown in FIG. 9, an illumination device 46 such as a projector lamp is used as the illumination device 46 and a slide plate 49 is provided below the illumination device 46 to illuminate the floor with appropriate characters and figures. Sometimes it is projected on the floor. As described above, when the lighting device 46 and the slide plate 49 are provided in the sounding body storage section 41, by displaying appropriate characters and figures on the floor, the directional speaker 10 can be displayed.
A description of the sound played by and the pattern that suggests the sound being played can be expressed on the floor to make people who cannot hear the sound near the speaker interested in the sound being played by the directional speaker 10. .

A transparent window is also provided on the side surface of the tip cover 45.
As shown in FIG. 10, a slide plate 49 is provided on the lower side, and a cylindrical second slide plate 51 is also provided on the side as shown in FIG.
There is also a case in which the characters and figures of the second slide plate 51 are projected on the reflection directing plate 11 by irradiating the side surface through the window 51 and the window portion 47.

When displaying characters, figures, or patterns on the reflection directing plate 11, the reflection directing plate 11 is made of a glass-like translucent body, and a cylindrical slide plate 51 is directly attached as shown in FIG. It may be provided at the lower end of the sounding body accommodating portion 41 to project the pattern of the slide plate 51 or the like onto the reflection directional plate 11 and illuminate the area directly below the directional speaker 10, and as shown in FIG. There is a case where a shield plate 48 is provided on the lower side while providing a slide plate 51 in a shape of, and a figure, a pattern, and characters are projected only on the reflection directing plate 11 without illuminating the floor with the lighting device 46.

Further, without disposing the cylindrical slide plate 51 on the side of the illuminating device 46, a plate-like slide plate 49 is disposed below the illuminating device 46, and instead of the shield plate 48, a flat plate-shaped mirror is arranged. Alternatively, a curved mirror or a conical mirror may be arranged, and figures, patterns and characters by the slide plate 49 provided below the illumination device 46 may be reflected by the mirror and displayed only on the reflection directing plate 11.

Further, instead of the flat slide plate 49, a liquid crystal plate is arranged below the illuminating device 46, and a figure or a pattern is projected by the light transmitted through the liquid crystal plate to change the figure or the pattern by the liquid crystal plate. A so-called liquid crystal projector provided with a liquid crystal control device may be arranged below the lighting device 46. In this embodiment, the lightweight reflection directing plate 11 can be easily attached to the ceiling or the like by the suspending support portion 21, and the reflection directing plate 11 having the sounding body storage portion 41 is attached to the ceiling or the like. A directional speaker 10 that can set the audible range only underneath the reflection directing plate 11 only by itself.
And because of using the transparent or semi-transparent reflection directing plate 11,
A person directly below the directional speaker 10 can hear the sound without giving a feeling of pressure, and the reflection directional plate 11 is formed in a stained glass shape, or the lighting device 46 is provided in the sounding body storage portion 41, and the lighting device 46. It is possible to visually enjoy by arranging a slide plate 51 on the side of the and projecting a figure or a pattern on the reflection directional plate 11, and listening to the sound by illuminating the floor directly below the directional speaker 10. The finished area is shown, and an appropriate pattern or the like can be projected by the slide plate 49 or the liquid crystal projector when the floor is illuminated.

When the pattern or image is displayed by the slide plate 49 or the liquid crystal projector, it is not limited to the pattern or image related to the sound being broadcast, and it is also possible to appropriately display the image for advertisement. . In addition,
The hanging support portion 21 is not limited to the one in which the three wires 24 are extended from the wire fixture 23 having the support hook 22, and the hanging support portion 21 includes wires from the external support plates 35 provided in the reflection directing plate 11.
The hanging support part 21 for fixing each external support plate 35 to the ceiling or the like by using 24 or a rod-shaped body may be used. In the case where the opening diameter is 1 m to several m, the size and the strength are
The number of external support plates 35 is not limited to three, and may be any number such as four or five.

In the above embodiment, the diameter of the opening of the reflection directing plate 11 is set to 1 m to several m, which is suitable for allowing a plurality of people to listen to the broadcast contents.
In some cases, the diameter of the opening is set to several tens of centimeters so that one person can hear the broadcast contents. In such a small directional speaker 10, the support rod attached to the inner support plate 36 is used.
55 shall directly support the speaker unit 42,
The number of support rods 55 is not limited to three or more, but one external support plate 35 is placed outside the center of the reflection directing plate 11 and one inner support plate 36 is attached to the reflection directing plate as shown in FIG. The speaker unit 42 provided inside the center of 11 may support the speaker unit 42 directed upward by one support rod 55.

When the reflection directing plate 11 is supported by the inner support plate 36 and the outer support plate 35 as described above, a screw is passed around the circular main body 31 as shown in FIG. It is preferable that the inner support plate 36 and the outer support plate 35 have a support plate 30 having a through hole 32 for allowing the main body part 31 to have a mounting part 33 provided with a mounting hole 34 near the center thereof. In the case of 35, a plurality of mounting portions 33 are formed and the directional speaker 10 may be suspended by a plurality of wires 24.

The small directional speaker 10 having an opening diameter of about several tens of centimeters is suitable for observing a small exhibit by looking into it. Speaker unit with volume
It is intended to broadcast from 42 and to prevent the broadcast contents from being heard by the reflection directing plate 11, not only when the speaker unit 42 is directed upward and the sound reflected by the reflection directing plate 11 is heard, In some cases, the speaker unit 42 is supported downward inside the reflection directing plate 11, and the sound from the speaker unit 42 is reflected by the reflection directing plate 11 so as not to leak to the surroundings.

Further, in supporting the reflection directing plate 11, an annular outer supporting plate 37 may be used as shown in FIG. Such an annular outer support plate 37 is used as the reflection directing plate 11.
This external support plate has an annular plate shape that matches the curvature of
The reflection directing plate 11 is closely attached to the inside of the 37, and as shown in FIG. 16, the inner supporting plate 36 having the plate-shaped main body 31 is attached to the reflection directing plate.
The inner support plate 36 is attached to the outer support plate 37 with screws at appropriate intervals inside 11 and the reflection directing plate 11 is sandwiched between the inner support plate 36 and the outer support plate 37.
In addition, when the external support plate 37 is a single annular support plate,
The directional speaker 10 can be supported by attaching the pillar 29 that is firmly integrated to the external support plate 37 as a support portion, and can be hung with a wire or the like as in the above-described embodiment. It is also possible.

When one external support plate is used, as shown in FIG.
As shown in FIGS. 7 and 18, a curved external support plate 38 extending from the vicinity of the apex of the reflection directing plate 11 to the vicinity of the lower end thereof may be used. When the reflection directing plate 11 is supported by the outer support plate 38, the inner support plate 36 and the outer support plate 36 are screwed by the inner support plate 36 having the plate-shaped main body 31.
38 and 38 support the reflection directing plate 11.

The speaker unit 42 and the sounding body storage section 41
At the time of mounting, a supporting rod 55 having a large rigidity is used, a plate-like inner supporting plate 39 having a relatively large area is formed at the base of the supporting rod 55, and the inner supporting plate 39 is fixed to the outer supporting plate 38 by screws or the like. In some cases, the support rod 55 may be connected to the support column 29 to support the sounding body storage section 41 and the like. Further, as another embodiment of the reflection directing plate 11, as shown in FIG. 19, a bowl-shaped upper reflecting portion 12 forming a part of a spherical surface.
In some cases, the reflection directing plate 11 is divided into an annular lower reflecting portion 15 forming a part of a spherical surface.

As shown in FIG. 20, the upper reflecting portion 12 is formed with a continuous or discontinuous annular outwardly projecting portion 13 along the outer periphery of the lower end of the upper reflecting portion 12 and A continuous or discontinuous annular inward projecting portion 16 is also provided along the inner circumference of the upper end of the reflecting portion 15, and the spherical shape formed by the lower reflecting portion 15 is the spherical shape formed by the upper reflecting portion 12. With the continuous spherical shape, the outer protruding portion 13 and the inner protruding portion 16 are engaged with each other so that the upper reflecting portion 12 and the lower reflecting portion 15 are detachable.

Therefore, the outer support plate 35 and the inner support plate 36 are provided on the upper reflecting portion 12 to suspend the upper reflecting portion 12 from the supporting portion 21.
Is fixed to the ceiling or the like, or the upper reflecting portion 12 is supported by an annular outer supporting plate 37 and an inner supporting plate 36 having a plate-shaped main body portion 31, and the outer projecting portion 13 with respect to the upper reflecting portion 12 The lower reflection part 15 can be attached to the upper reflection part 12 by engaging the inward projection 16 with the inward projection 16 to form the reflection direction plate 11 of the directional speaker 10 with a narrowed audible area, as shown in FIG. , The lower reflecting portion 15 having a different bottom end diameter of the lower reflecting portion 15,
Alternatively, as shown in FIG. 22, the lower reflector 15 having a different height h is used.
Is prepared and the lower reflection part 15 is replaced, whereby the directional speaker 10 having different audible areas can be obtained.

Further, the reflection directing plate 11 separated into the upper reflecting portion 12 and the lower reflecting portion 15 is a place where the upper reflecting portion 12 is housed and attached inside the lower reflecting portion 15, as shown in FIG. There is also an advantage in that it can be transferred to a portable device and can be easily handled during the transfer. Further, the lower reflector 15 is made of a material different from the material of the upper reflector 12 so that the reflectance depending on the frequency is changed so that the reflectance in the low-pitched sound range of the sound emitted from the speaker unit 42 is strong. Low bottom reflector 15
It is also possible to reduce the reflectance by selecting the material of the above or by performing the sound absorbing process on the inner surface of the lower reflecting portion 15 so that the timbre in the audible area becomes close to a natural sound.

As described above, the directional speaker 10 according to the present embodiment enables the sound to be clearly heard in a predetermined area, and the explanation of the product, the poster, or the exhibit is explained. It is easy to make it possible to listen just before, and for large ones that several people can hear, display advertising related to exhibits etc. on the reflective direction board 11. It is also possible to do so, and there is also an advantage that the explanation and the image can be appealed to the listener and the user by the auditory sense by the sound and the visual sense by the eye.

[0038]

According to the present invention, the inside and outside of the reflection directing plate are sandwiched by plate-like support plates, the external supporting plate is fixed to the support portion to support the reflection directing plate, and sound is generated by the support rods attached to the inner supporting plate. Supporting the body housing does not apply an unreasonable force to the reflection directing plate, and since the force is dispersed by the plate-shaped support plate when supporting the reflection directing plate, the reflection directing plate is thin and lightweight and has a directivity. The speaker can be easily installed.

In the directional speaker having the annular reinforcing portion at the lower end of the reflection directing plate, the annular reinforcing portion enhances the strength of the reflection directing plate, and the reflection directing plate can be easily made thinner and lighter. By making the plate lightweight, it is possible to further facilitate the installation of the directional speaker. Further, according to the invention described in claim 3, since the speaker housing is used for supporting the speaker unit, it is easy to combine the speaker unit and another device and arrange them inside the reflection directing plate. In the invention described in Item 4, since the lighting device is housed in the sounding body housing portion, the lighting device can illuminate the area directly below the directional speaker, and the audible area of the directional speaker can be illuminated.
According to the invention described in claim 5, since the slide plate and the liquid crystal projector are arranged under the lighting device, the audible area is illuminated and characters, figures, patterns and the like having a relation with sound are projected in the audible area. With this, it is possible to associate the broadcast sound with a figure, a pattern, or the like combined with the broadcast sound so that the sound can be attracted from a position where the sound cannot be heard. Since the slide plate is arranged on the side of the device, the characters, figures, or patterns of the slide plate can be projected on the reflection directing plate, and the visual enjoyment can be given to the person according to the sound.

According to the invention described in claim 7, since the substantially hemispherical reflection direction plate can be divided into a bowl-shaped upper reflection direction plate and an annular lower reflection direction plate, the diameter is 1 m to several m. The directivity has the advantage that it facilitates the transfer of the reflection directing plate, and that it is easy to change the appearance of the reflection directing plate and change the reflection direction of the reflected sound by replacing the lower reflection part. It is a reflection directing plate of the speaker.

[Brief description of drawings]

FIG. 1 is a side view of a directional speaker according to the present invention.

FIG. 2 is a plan view of a support plate used for the directional speaker according to the present invention.

FIG. 3 is a diagram showing a mounting state of a support plate of the directional speaker according to the present invention.

FIG. 4 is a vertical sectional view showing a sounding body storage portion of the directional speaker according to the present invention.

FIG. 5 is a diagram showing another embodiment of the reflection directing plate of the directional speaker according to the present invention.

FIG. 6 is a cross-sectional view showing an end portion of a reflection directing plate in the directional speaker according to the present invention.

FIG. 7 is an external view showing an example of a sounding body storage portion of the directional speaker according to the present invention.

FIG. 8 is a vertical cross-sectional view showing another example of the sounding body storage portion of the directional speaker according to the present invention.

FIG. 9 is a diagram showing another example of the sounding body storage portion of the directional speaker according to the present invention.

FIG. 10 is a view showing another example of the tip cover of the sounding body storage portion of the directional speaker according to the present invention.

FIG. 11 is a diagram showing another example of the sounding body storage portion of the directional speaker according to the present invention.

FIG. 12 is a diagram showing another example of the sounding body storage portion of the directional speaker according to the present invention.

FIG. 13 is a diagram showing another embodiment of the directional speaker according to the present invention.

FIG. 14 is a plan view showing another embodiment of the support plate used for the directional speaker according to the present invention.

FIG. 15 is a rear view showing another embodiment of the external support plate used for the directional speaker according to the present invention.

FIG. 16 is a side sectional view showing another embodiment of the external support plate used for the directional speaker according to the present invention.

FIG. 17 is a side sectional view showing another embodiment of the external support plate used for the directional speaker according to the present invention.

FIG. 18 is a rear view showing another embodiment of the external support plate used for the directional speaker according to the present invention.

FIG. 19 is a side view showing a second embodiment of the reflective directional plate of the directional speaker according to the present invention.

FIG. 20 is an enlarged cross-sectional view of a main part in a second embodiment of a reflection directing plate.

FIG. 21 is a diagram showing a modified example of the second embodiment of the reflection directing plate.

FIG. 22 is a diagram showing another modification of the second embodiment of the reflection directing plate.

FIG. 23 is a view showing a state in which the second embodiment of the reflection directing plate is stored and transferred.

[Explanation of symbols]

10 Directional Speaker 11 Reflective Directional Plate
12 Upper Reflection Part 13 Outer Projection Part 15 Lower Reflection Part 16 Inner Projection Part 19 Annular Reinforcement Part 21 Suspension Support Part 22 Support Hook 23 Wire Fixing Tool 24 Wire 26 Screw 27 Nut 29 Strut 30 Support Plate 31 Support Plate Body 32 Through hole 33 Mounting portion 34 Mounting hole 35, 37, 38
External support plate 36, 39 Inner support plate 41 Sounding body storage section 42 Speaker unit 45 Tip cover 46 Illumination device 47 Window section 48 Shielding plate 49, 51 Sliding plate 52 Screw 55 Support bar

Claims (7)

[Claims] 1. A speaker in which a speaker unit is provided inside a reflection hemisphere having a substantially hemispherical shape, and a plate-shaped support plate along the curved surface of the reflection helix is attached to the inside and outside of the reflection helix to sandwich the hemisphere. Both support plates are fixed, the directional speaker support is attached to the external support plate that is fixed to the outside of the reflection directing plate, and the support rod is attached to the inner support plate that is fixed to the inside of the reflection directing plate to install the speaker unit. A directional speaker characterized by being supported. 2. The directional speaker according to claim 1, wherein an annular reinforcing portion is formed at a lower end of the reflection directing plate. 3. A speaker rod supported by a support rod attached to an inner support plate, and a speaker unit directed toward the center of a reflection directing plate inside the speaker storage unit. The directional speaker according to claim 1, wherein the directional speaker is supported by. 4. The directional speaker according to claim 3, wherein a lighting device is housed inside a lower part of the sounding body housing part. 5. The directional speaker according to claim 4, wherein a slide plate or a liquid crystal projector is arranged below the lighting device. 6. The directional speaker according to claim 4, wherein a slide plate is arranged on the side of the illuminating device, and a shadow image of the slide plate is projected on a substantially hemispherical reflection directivity plate. 7. An upper reflecting portion formed by a bowl-shaped upper reflecting portion forming a part of a spherical surface, and an annular lower reflecting portion having a spherical shape having a curvature continuous with the curvature of the upper reflecting portion. A reflective directivity plate for a directional speaker, characterized in that the lower part and the lower reflective part are detachable.