JP2005318484A - 360°-aperture horn speaker system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a high-sound quality speaker by which more stereo-phonic sound images can be attained by realizing both sound spreading and sound rising while reducing oscillation or vibration of an enclosure or the like caused by reaction to movement of a diaphragm of a speaker system. <P>SOLUTION: In a 360°-aperture horn speaker system, a pair of speaker units are aligned to face each other, and a conical sound diffuser is arranged in the center, clamped with bolts and nuts while confronting curved baffle surfaces and interposing a spacer so as to form a horn with the curved baffle surfaces, and separately fixed to mutually cancel reaction forces. In this speaker system, an enclosure is configured as a back-load horn scheme or a bass reflex scheme. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

The present invention relates to a speaker device capable of reproducing sound with good sound quality.

As an example of a conventional speaker system, there is a direct radiation type shown in FIG. Taking 3 way as an example, a woofer, squawker, and tweeter are attached to the front of the enclosure via a baffle plate. Further, a connection input terminal and a network (not shown) are attached to the rear wall.

In the direct radiation type speaker, there is a phenomenon in which a reaction to the movement of the diaphragm acts on the speaker unit, and the magnetic circuit, the enclosure, and the like swing and vibrate. Oscillation or vibration due to reaction lowers energy transmission efficiency, deteriorates excessive characteristics, impairs the sound rise and speed, and leads to sound quality degradation. In order to suppress vibration and vibration and improve sound quality, a method of increasing the mass of the frame, the magnetic circuit, and the enclosure has been generally taken.

When a horn speaker is used in the high sound range, the sound rises well, but the sound spread is poor. As described above, the conventional speaker has a drawback in that sound spread and sound rise are not compatible. In addition, in the case of multiway, a network is required between the amplifier and the speaker, which may cause distortion due to a coil, a capacitor, and resistance, and a part of the sound of the band may be harshly heard. Furthermore, the sound image and the sound field produced by the speaker system attached to one baffle plate were flat and lacked a three-dimensional effect.

In addition, some audiophiles use a relatively small full-range speaker unit to directly radiate mid- and high-pitched sounds coming from the front, and play back sound through a long sound path to create a low-frequency range. The back load horn system which improves is loved. This type is close to the open back, and the movement of the cone paper is light and does not require a network and has a high reproduction capability for minute signals, but it is suitable for mass production because it must form a long sound path bent inside. There wasn't.

On the other hand, as an omnidirectional speaker, there is a type of product that reflects and diffuses sound from the speaker in all directions by placing the speaker upward or downward and installing a conical sound diffuser in front of the speaker. .

By the way, in an actual orchestral sound, a stringed instrument spreads omnidirectionally, and a wind instrument has a strong directivity. It is desirable that the sound of the stringed instrument is omnidirectional and the sound of the wind instrument is reproduced with directivity in the reproduction by the speaker. However, it has been difficult to achieve this with a conventional speaker system because it is necessary to combine the contradictory properties of directivity and omnidirectionality.

In the conventional speaker system described above, a reaction to the movement of the diaphragm acts on the speaker unit, causing a phenomenon in which the magnetic circuit, the enclosure, and the like oscillate and vibrate. Oscillations and vibrations due to the reaction lowered the energy transmission efficiency, worsened the excessive characteristics of the reproduced sound, and deteriorated the sound quality by deteriorating the sound rise and speed.

In addition, the conventional speaker has a drawback that the sound spread and the sound rise are not compatible, and the sound image and the sound field are flat and lack a three-dimensional effect.

The present invention has been made in view of the above points, and its object is to reduce the vibration and vibration of the enclosure and the like due to the reaction to the movement of the diaphragm, and to achieve both the spread of sound and the rise of sound to achieve more three-dimensionality. It is an object to provide a speaker that can be heard with a simple sound image.

In the speaker device of the present invention, a pair of speaker units are arranged so as to face each other on the same straight line, a conical sound diffuser is disposed at the center thereof, and a baffle surface having a curved surface is opposed to the curved surface and the curved surface And clamped with bolts and nuts sandwiching a spacer so as to form a horn shape, and fixed separately. In this way, the speaker unit is a horn speaker device having an opening of 360 ° characterized by a structure in which the speaker units are integrated so as to face each other on the same straight line. It was a solution to the problem.

A pair of speaker units are opposed to each other and mechanically connected so as to maintain an arrangement state in which the drive axes are positioned on the same straight line. By driving them in phase, the reaction force generated in the support system of the speaker unit is reduced. Since they cancel each other, the vibration and vibration of the speaker unit and the enclosure due to the reaction force of the diaphragm can be suppressed, and the rise of sound is excellent with excellent transient characteristics without increasing the mass of the frame, magnetic circuit and enclosure. Sound quality with a sense of speed can be obtained.

Since the front horn is formed by the curved surfaces of the baffle faces facing each other, it becomes an omnidirectional horn speaker in the vertical direction. The rise of the sound is compatible, and a more three-dimensional and sharp sound image can be obtained.

BEST MODE FOR CARRYING OUT THE INVENTION

FIG. 1 shows an example of a 360 ° opening horn speaker device of the present invention configured by a back load horn system. FIG. 1 is a sectional view and FIG. 2 is a perspective view. Reference numeral 1 in the figure denotes a speaker unit, which is driven in the same phase with a pair of the same thing of a full range type or a coaxial two-way type.

Reference numeral 2 is a backload horn type enclosure made of a low-foamed styrene resin or the like molded into a mold, and a pair of molded products in which an air chamber and a groove for a sound path are molded are bonded to each other to form an air chamber and A bent sound path is formed. For mold molding using foamed resin, if one set of molds is made with an accurate exponential curve, mass production is possible later, and there is an advantage that it can be produced at low cost without man-hours. The sound path is opened from the leg part through the spiral part, and a long sound path can be made relatively small and light. The part to which the speaker unit is attached has a shape like a washbasin with a hole, and the buff surface has a curvature, and four small holes through which bolts for attaching the speaker unit are opened around the hole. A front short horn having a 360-degree opening is formed by the curved surfaces of the buff surfaces facing each other.

Reference numeral 3 denotes a sound diffuser, which has a curved surface for diffusing sound emitted from a speaker unit made of a resin molded product or metal or the like by 360 °, and has four small holes through which bolts pass.

Reference numeral 4 denotes a spacer, which is made of a resin molded product or metal, and has a hole through which a bolt passes. A pair of baffle surfaces with curved surfaces and a sound diffuser are used to fix them at regular intervals. The spacer and the sound diffuser may be integrally molded.

The pair of speaker units, the pair of enclosures, the sound diffuser, and the spacer are integrated with bolts that are clamped with nuts from both sides.

FIG. 3 is a perspective view showing an internal sound path of the backload horn type enclosure of the present invention. An air chamber and a bent sound path are formed inside by bonding together a pair of foamed resin molded products in which an air chamber and a sound path groove are molded. Because of the mold molding using foamed resin, it can be designed relatively freely at the design stage and can be mass-produced at low cost. The required strength can be obtained by adjusting the degree of foaming using a material such as styrene beads.

FIG. 4 is a cross-sectional view showing an example in which the omnidirectional horn speaker device of the present invention is configured by a bass-reflex type enclosure.

It is sectional drawing which shows an example of the 360 degree opening horn speaker apparatus of this invention comprised by the back load horn system. The cut surface in the AA 'line of FIG. It is a perspective view of an example of the 360 degree opening horn speaker apparatus of this invention comprised by the back load horn system. It is the perspective view which showed the sound path inside the back load horn type enclosure of this invention. It is sectional drawing of an example of the 360-degree opening horn speaker apparatus of this invention comprised with the bass-reflex type enclosure. It is the schematic which showed an example of the conventional 3 way direct radiation | emission type | mold speaker system.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Speaker unit 2 Back load horn 3 Sound diffuser 4 Spacer 5 Sound path 6 Opening part 7 Air chamber 8 360 degree opening horn Speaker apparatus part 9 Bass reflex type enclosure 10 Sound absorption material 11 Duct 12 Enclosure 13 Tweeter 14 Squawer 15 Woofer 16 Foamed resin molded product 17 Groove for sound road

Claims (3)

A pair of speaker units are arranged on the same straight line, a conical sound diffuser is placed in the center, and the baffle surface to which the speaker unit is attached has a curved surface, and the curved surface and curved surface form a horn shape. A horn speaker device having a 360 ° opening, characterized in that the structure is fixed at a distance. An enclosure for a backload horn characterized in that an air chamber and a bent sound path are formed by bonding together a pair of foamed resin molded products in which an air chamber and a sound path groove are molded, and the backload The speaker device according to claim 1, comprising a horn enclosure. The speaker device according to claim 1, wherein the enclosure is configured as a bass reflex system.

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