JP2000278784A - High efficiency compact speaker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the quality of sound and to easily execute processing and working by forming a sound passage by two plates, arranging a reflector for refracting the sound passage by a specific angle in front of the speaker and setting an interval between two plates large enough to insert the reflector. SOLUTION: An exponential partition 9 is arranged between upper and lower plates 8 whose external form is flat and square and a spiral sound passage 10 is formed from a sound source 1 up to an aperture 3 for radiating sound. Thereby sound from the sound source 1 passes through the sound passage 10 gradually spread exponentially or hyperbolically and is radiated from the aperture 3 which amplifies sound. The reflector for refracting the sound passage 10 by almost 90 deg. is arranged in front of the speaker. When a diaphragm of the sound source 1 is vertically set, sound is horizontally radiated into the sound passage, or when the diaphragm is turned downward, the sound is turned to the horizontal direction by a 45 deg. reflector and sent to the horizontal sound passage 10. When the sound passage 10 is bent in the vertical direction and superposed and the superposed face is utilized as a partition 9, the sound passage 10 is extended in accordance with the number of superposed stages.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a compact and bulky speaker having a high efficiency, a particularly long range of sound.

[0002]

2. Description of the Related Art In the conventional horn speaker shown in FIG. 1, the sound path 2 is extended linearly from a sound source section 1 so as to enlarge the sound coming out of an opening 3. It was extremely inconvenient to use and store, and the performance of the sound 4 was at most 800 meters. Therefore, in order to make the whole compact, as shown in FIG. 2, the tubular body 5 is concentrically stacked, the sound path 2 is formed between them, and the sound path is folded back 6 at the end to shorten the trumpet as a whole. Loudspeakers are known, but have the disadvantage that the sharp turns of their ends reduce efficiency, cause distortion of the sound, and therefore the sound reach does not exceed 800 meters, resulting in poor sound quality. .

[0003]

An object of the present invention is to provide a sound path that is particularly long, has good sound quality, is easy to process and work, is inexpensive and lightweight, and is easy to handle without being bulky.

[0004]

According to the present invention, there is provided a partition between two planes which forms a spiral sound path extending from a sound source portion to an opening.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A long sound path bent substantially in a spiral or arc shape is formed by a partition wall.

[0006]

3 to 6 show an embodiment of the present invention.
4 is a perspective view, FIG. 4 is a cross-sectional view, 7 is an upper plate, 8 is a lower plate, 3 is an opening through which sound is produced, 1 is a known sound source unit having a magnet, a diaphragm and a coil, 9 is an exponential signal. The partition is provided between an upper plate and a lower plate having a flat outer shape and a rectangular shape, and forms a spiral sound path 10 from the sound source unit to the opening. As a result, the sound of the sound source section is enlarged through the sound path 10 which sequentially spreads exponentially or hyperbolically, and the aperture 3
More radiated. The example of FIG. 5 is a method in which the diaphragm of the sound source unit 1 is set vertically and the sound is emitted horizontally into the sound path. In the example of FIG. 6, the diaphragm of the sound source unit 1 is directed downward, and the sound is transmitted into a horizontal sound path by the 45-degree reflecting plate 11 as the horizontal direction.

FIG. 7 and FIG. 8 show a case where a frame 13 is mounted on the roof of a light van 12 and a speaker 14 of the present invention is mounted thereon.
Are mounted on one or two as shown. 2
By turning the opening 3 to the left and right so that the sound emission is on both sides on the stand, the maximum sound can be played to the left and right by making full use of the roof of the light van car, which is indispensable for elections, publicity etc. It will be. The rectangular side surface of the speaker body 14 is a high and wide advertising surface, and the name of the candidate for the election 15 is entered. The speaker of the present invention, which conventionally required both a speaker and a signboard, requires only speech. Since it can be used for both purposes, the cost is reduced and the utilization of the rooftop space of the car is expanded. FIG. 9 shows an embodiment of the present invention in which the speaker of the present invention and an exhibition exhibit 16 are placed on the roof of a light van car 12 and a speech table 17 for election candidates is provided. The dimensions of the speaker 14 of the present invention manufactured by the inventor are 1200 m in length.
m, 1,200 mm in width, 710 mm in height of the surface of the opening 3, 1000 mm in length, 2000 mm in width, and the like. FIG. 10 shows an embodiment of the present invention in which the vertical and horizontal lengths are substantially 1: 2, and the sound path is made as long as the width and length of the vehicle.

FIG. 1 is a longitudinal sectional view of FIG. 11 and a plan view thereof.
2 is also an embodiment of the present invention, wherein the sound path 10 is bent in the vertical plane direction and overlapped, and the overlapping surfaces 18, 19, and 20 are used as partition walls. The sound path becomes longer as the number of overlapping steps increases. Various modifications and combinations of the above-described embodiments of the present invention are all included in the present invention.

[0009]

According to the present invention, a very long sound path emitting a large volume can be accommodated in a small volume. Moreover, since a large volume is generated without deteriorating the sound quality, as shown in FIG. 13, sound can be transmitted up to 1500 meters which is almost twice as large as that of the conventional product. Or, if it is the same volume as the conventional product,
The whole can be made particularly small. Furthermore, since the display and the signboard are used for election and publicity, the signboard is not required, and the rooftop space of the vehicle can be saved. The present invention is for election, advertising, evacuation announcement,
This is a great invention that has an extremely innovative effect on social activities such as emergency services.

[0010]

[Brief description of the drawings]

FIG. 1 is a side view of a first conventional example.

FIG. 2 is a longitudinal sectional view of a second conventional example.

FIG. 3 is a perspective view of the first embodiment of the present invention.

FIG. 4 is a cross-sectional view of FIG.

FIG. 5 is a side view of a second embodiment of the present invention.

FIG. 6 is a side view of a third embodiment of the present invention.

FIG. 7 is a side view of a fourth embodiment of the present invention.

FIG. 8 is a plan view of FIG. 7;

FIG. 9 is a side view of a fifth embodiment of the present invention.

FIG. 10 is a cross-sectional view of a sixth embodiment of the present invention.

FIG. 11 is a longitudinal sectional view of a seventh embodiment of the present invention.

FIG. 12 is a plan view of FIG. 11;

FIG. 13: Speaker volume

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sound source part 2 Aperture for emitting sound 7, 8 Upper and lower plates 2, 10 Sound path 9 Partition wall

[Procedure amendment]

[Submission date] January 31, 2000 (200.1.3
1)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

Claims (1)

[Claims] 1. A high-efficiency compact speaker characterized in that a spiral wall is provided so as to have a sound path radially between two planes.