JPH08186889A - Speaker - Google Patents

Abstract

PURPOSE: To obtain the spreading sound field presence by a speaker, to reduce installa tion space as a result, to make the constraint for installation difficult to be received and to improve the degree of freedom by arranging a pair of acoustic transmission tubes on the front surface side and the rear surface side of the diaphragm of a speaker unit. CONSTITUTION: The sound waves generated due to the vibration of the diaphragm of a speaker unit 2 is divided into two kinds of sound. One is the radiation sound passing the air gap 9 between the acoustic transmission lines 5 within two acoustic transmission bodies 3 and the acoustic transmission bodies 3 and being radiated to the outside and the other is transmission sound transmitting the acoustic transmission bodies 3 are being propagated to the outside. The synthetic sound of these radiation sound and the transmission sound is to be listened. This synthetic sound receive the actions such as a reflection and an absorption, etc., at the inner walls of the acoustic transmission bodies 3 and receive the influence of resonance, and a peculiar tone quality is imparted to the sound. By arranging the acoustic transmission bodies 3 on the front surface side and the rear surface side of the diaphragm of the speaker unit 2, the sound waves from the speaker unit 2 are radiated from the front surface side and the rear surface side of the diaphragm. Therefore, spreading sound field presence can be obtained by a speaker.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a speaker which constitutes a so-called stereo system for reproducing sound and finally converts an electric signal into sound.

[0002]

2. Description of the Related Art In a stereo system, a speaker is important because it greatly influences a reproduced tone color and sound quality. For example, a speaker unit as disclosed in Japanese Patent Laid-Open No. 4-362899 and Japanese Utility Model Laid-Open No. 5-80094 is used. There is a horn type speaker that connects a base end of a trumpet-shaped horn to the front side of a diaphragm and configures the inside of the horn as an acoustic transmission path to generate a tone color according to the material of the horn.

[0003]

In the conventional speaker,
Since it is not possible to obtain a spacious sound field with only one unit, 2
As a set of bases, they are used by arranging them at an appropriate distance from each other, and therefore there is a drawback that a wide space for installation is required. Also, the entire speaker is 1
It was not designed as a single sounding body to obtain a broad sound field, but it was also lacking in novelty in design.

The present invention has been made in view of the above circumstances, and it is possible to capture the whole as one sounding body with only one unit, and a wide sound field feeling as a speaker,
It is an object of the present invention to provide a speaker that can be sufficiently obtained by selecting the types of sounds and music, is not easily restricted by the installation space, and has a novel design.

[0005]

The present invention has been made to achieve the above object, and a speaker according to claim 1 is a speaker unit having a diaphragm, and a front side of the diaphragm of the speaker unit. On the rear surface side, a tubular acoustic transmitter having a pair of coaxial arrangements with each other being the acoustic transmission path, and a space for exposing the pair of acoustic transmitters to the outside. It is characterized in that it is provided with a connecting member that connects in a closed state.

[0006]

According to the speaker of the first aspect of the present invention, the sound wave generated by vibrating the diaphragm of the speaker unit passes through the acoustic transmission path in the two acoustic transmission bodies and the space between the acoustic transmission bodies to the outside. The radiated sound radiated to the sound source and the transmitted sound that is transmitted to the outside after passing through the acoustic transmitter are divided into two types, and the listener hears the synthesized sound of the radiated sound and the transmitted sound.
This sound is reflected, absorbed, and the like on the inner wall of the acoustic transmitter, and is also affected by the resonance and resonance of the acoustic transmitter, and has a unique tone color (for example, a thick, soft, and bright sound). Since the acoustic transmitters are arranged on the front side and the rear side of the diaphragm of the speaker unit, the sound waves from the speaker unit are radiated from the front side and the rear side of the diaphragm, so that one unit has a wide space. A feeling of sound field can be obtained. Further, the entire speaker is configured like one sounding body, and the presence of the sound source can be felt by the entire speaker.

According to a third aspect of the present invention, in the loudspeaker according to the first or second aspect, since the acoustic transmitter is made of a brass or copper metal for wind instruments, the reproduced sound has a tone color specific to the wind instrument. And the spread of the sound is added.

[0008]

An embodiment of the present invention will be described below with reference to the drawings. 1 (a) and 1 (b) show a speaker 1 according to an embodiment, and the speaker 1 includes a speaker unit 2 and
The speaker unit 2 includes a pair of acoustic transmission pipes (acoustic transmission bodies) 3 arranged on both sides, and a plurality of connecting rods (coupling members) 4 that connect the acoustic transmission pipes 3.

The acoustic transmission tube 3 is a tubular body having a circular cross section, and the inner space serves as the acoustic transmission path 5. A tube body 6 occupying most of the length of the acoustic tube 3 is formed into a tapered tubular shape. A ring portion 7 having a uniform thickness and a constant outer diameter is coaxially formed integrally with the base end portion on the large diameter side. The outer diameter of the ring portion 7 is larger than the outer diameter of the base end portion of the pipe body 6, and a step portion 8 is formed. Although the wall thickness of the tube body 6 is constant, the inner surface of the ring portion 7 is continuous from the inner surface of the tube body 6, and gradually increases in diameter as it approaches the opening and spreads like a trumpet. The pair of acoustic transmission tubes 3 are arranged such that the ring portions 7 face each other with a predetermined gap 9 therebetween and are arranged coaxially with each other, and the state is bridged between the ring portions 7 and fixed. Are connected by a connecting rod 4. The connecting rods 4 are arranged at a plurality of places (in this case, four places) equally divided around the circumference of the ring portion 7. As the material of the sound transmission tube 3, brass or copper used in wind instruments is acoustically most preferable,
Other materials (wood, resin, etc.) can be considered as long as they are acoustically excellent.

The speaker unit 2 is a so-called full-range type that covers the entire range from low-pitched sound to high-pitched sound, and as shown in FIGS. 2 and 3, a magnet 10 having a coil built therein, a diaphragm 11, and these. The frame 12 has a generally known structure including a supporting frame 12 and the like, and the frame 12 is fixed to the ring portion 7 of the one acoustic transmission tube 3. In this fixed state, the diaphragm 11 faces the other acoustic transmission tube 3, that is, the pair of acoustic transmission tubes 3 are coaxially arranged on the front side and the rear side of the diaphragm 11 of the speaker unit 2. ing. Also, when viewed from the side,
The diaphragm 11 is arranged so as to be exposed and visible to the outside through the space 9 between the acoustic transmission tubes 3.

The configuration of the speaker 1 has been described above. To describe an example of the size of the speaker 1, the overall length (the length between the ends of the two tube bodies 6 on the small diameter side): 500
~ 600 mm, large diameter end of tube body 6: 57 mm, small diameter end: 47 mm, wall thickness: 0.5 ~
0.7 mm, diameter of the ring part 7: 95 mm, width: 45 mm, gap 9 between the ring parts 7:
The diameter of the speaker unit 2 is 10 mm and the diameter is 80 mm. These sizes are not limited, of course, but the size ratio does not significantly change.

According to the loudspeaker 1 of this embodiment, when a voice electric signal is supplied to the loudspeaker unit 2, the diaphragm 11 vibrates correspondingly to generate a sound wave (compression wave). When the sound wave exits from the acoustic transmission pipes 3, it passes through the acoustic transmission paths 5 in the two acoustic transmission pipes 3 or the voids 9 between the acoustic transmission pipes 3 as shown by solid arrows in FIG. Are radiated to the outside as a radiated sound and a radiated sound that is transmitted to the outside through the pipe body 6 or the ring portion 7 of the acoustic transmission pipe 3 as shown by a dashed arrow. The synthesized sound of the transmitted sound and the transmitted sound reaches the listener's ear. The sound waves emitted by the speaker unit 2 are reflected and absorbed by the inner wall of the acoustic transmission tube 3 and are affected by the resonance and resonance of the acoustic transmission tube 3 to have a unique tone color (for example, thick and soft sound). It is emitted to the outside. In particular, the shape and material of the acoustic transmission tube 3 or mechanical properties such as rigidity are
A tone color peculiar to the speaker 1 is emitted by being added to the finally output sound.

The speaker 1 is installed, for example, above a wall in a room in a horizontally mounted state in which the longitudinal direction is along the horizontal direction or in a vertically mounted state in which the longitudinal direction is along the vertical direction. The sound of the speaker 1 spreads left and right in the horizontally mounted state, and the sound of the speaker 1 spreads vertically in the vertically mounted state. In addition, the sound spread can be sufficiently obtained by one speaker 1, but if the two speakers are installed apart from each other, the feeling of the sound spread can be further increased.

According to the speaker 1, each acoustic transmission tube 3
Are arranged on the front surface side and the rear surface side of the diaphragm 11 of the speaker unit 2, and the vibration is divided, and a wide sound field feeling can be obtained with one unit, and as a result, the installation space is small and the installation is possible. It is hard to be restricted by and the degree of freedom is improved. Further, the entire speaker 1 is configured like one sounding body, the presence of a sound source can be felt in the entire speaker 1, and a novel image in terms of design is produced, and the speaker can be provided as an extremely unique speaker. Further, since the material of the acoustic transmission tube 3 is brass, copper or the like used in a wind instrument, a tone color peculiar to the wind instrument and the spread of the tone are added to the reproduced sound to obtain a comfortable tone color.

The above-mentioned speaker 1 is one embodiment of the present invention, and the basic structure has been shown. For example, the length, thickness, thickness, etc. of the acoustic transmission tube 3 are appropriately changed. Further, instead of a tapered tube, a straight tube having a constant diameter may be used, and in some cases, a hole may be formed in the acoustic transmission tube 3, and various variations in consideration of resonance and timbre due to resonance may be considered.

[0016]

As described above, according to the first aspect of the present invention.
According to the speaker of, since the pair of acoustic transmission tubes are arranged on the front side and the rear side of the diaphragm of the speaker unit, the sound waves from the speaker unit are radiated from the front side and the rear side of the diaphragm. With a single unit, a spacious sound field can be obtained, and as a result, the installation space is small, and it is less subject to restrictions for installation, and conversely the degree of freedom is improved.
Further, the entire speaker is configured like one sounding body, the presence of a sound source can be felt in the entire speaker, and a novel image in terms of design is created, and the speaker can be provided as an extremely unique speaker.

[Brief description of drawings]

FIG. 1 is a speaker according to an embodiment of the present invention,
(A) is a side view and (b) is a front view.

FIG. 2 is an enlarged side view of a main part of the speaker.

FIG. 3 is a view taken along the line PP of FIG.

[Explanation of symbols]

1 ... Speaker, 2 ... Speaker unit, 3 ... Acoustic transmission pipe (acoustic transmission body), 4 ... Connecting rod (connecting member), 5 ... Acoustic transmission path, 6 ... Pipe main body, 7 ... Ring part, 9 ... Void.

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[Procedure amendment]

[Submission date] January 24, 1995

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0007

[Correction method] Delete

Claims (1)

[Claims] 1. A speaker unit having a diaphragm, and a tubular unit in which a pair of states are coaxially arranged on the front side and the rear side of the diaphragm of the speaker unit and whose inner space serves as an acoustic transmission path. A speaker comprising: an acoustic transmitter; and a connecting member for connecting the pair of acoustic transmitters in a state in which a gap exposing the diaphragm is opened.