JPH0733098U - Horn speaker structure - Google Patents

Abstract

(57) [Abstract] [Purpose] To propose a horn speaker structure that can efficiently enhance the bass part and widen the reproduced sound range. [Structure] On the front side of the diaphragm 25 of the speaker unit 20, a planar tapered surface 3 is formed so that the aperture becomes smaller toward the front.
A regular polygonal cylindrical sound pressure boost unit 30 is formed,
A horn portion 40 having a diameter gradually increasing toward the outside is provided at the front of the sound pressure boosting portion.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 This invention relates to an improved structure of a horn speaker.

[0002]

[Prior art]

 The horn speaker has a horn part provided on the diaphragm (cone) of the speaker unit, and the horn gradually reduces the difference in hardness between the diaphragm and air so that sound waves can be efficiently radiated into the space.

As a general horn speaker, a horn speaker in which a conical horn portion whose diameter gradually increases toward the outside is provided on the front side of the diaphragm of the speaker unit is often used. However, this horn speaker is generally used for high-range or mid-range sounds of a composite type speaker, and is rarely used for low-range sounds. This is because in the low frequency range, the sound waves emitted from each part of the diaphragm propagate through the horn in the same phase, but when the frequency becomes higher, the phases become unaligned in relation to the wavelength of the sound wave, which is why It is considered that the sound output decreases as they interfere with each other.

[Problems to be solved by the device]

The present invention proposes a new improved structure capable of efficiently enhancing the low-pitched sound part and widening the reproduced sound range in the horn speaker of this kind having a problem in reproducing the sound in the low-pitched sound range. It is what

[0005]

[Means for Solving the Problems]

 That is, the present invention forms a square tube-shaped sound pressure boost section consisting of a flat taper surface on the front side of the diaphragm of the speaker unit so that the diameter becomes smaller toward the front section. The present invention relates to the structure of a horn speaker, which is characterized in that a horn portion whose diameter gradually increases toward the outside is provided.

[0006]

【Example】

 An embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a longitudinal sectional view of a main part of a horn speaker showing an example of the present invention, and FIG. 2 is a rear view of the sound pressure boosting part.

As shown in FIG. 1, the horn speaker 10 of the present invention includes a speaker unit 20, a sound pressure boosting section 30, and a horn section 40. Reference numeral 11 in FIG. 1 is a speaker box.

The speaker unit 20 has a known structure, and is installed in the speaker box 11 by a mounting member 12. Reference numeral 21 is a magnet portion, and 25 is a diaphragm. Reference numeral 15 on the front plate 13 of the speaker box 11 is an opening for sound waves on the rear side of the speaker unit 20, and four openings are provided.

The sound pressure booster 30 is attached to the front side of the diaphragm 21 of the speaker unit 20. In the embodiment, it is mounted via the mounting member 12. As can be understood from FIGS. 1 and 2, the sound pressure boosting section 30 is formed in a rectangular tube shape having flat tapered surfaces 31, 31, 31, ... That have a smaller diameter toward the front. Although the sound pressure boosting section 30 has a regular dodecagonal tube shape in the illustrated embodiment, it may have a triangular tube shape, a quadrangular tube shape, or a polygonal tube shape of more than that. However, the shape is not limited to this, and may be a rectangular tube shape symmetrical with respect to a horizontal or vertical line or a deformed rectangular tube shape if necessary.

In the sound pressure boosting unit 30, the cylindrical portion having a smaller diameter toward the front portion is used to temporarily compress (squeeze) the sound wave emitted from each portion of the diaphragm 25, This is to strengthen the low-pitched sound and apply a large horn load.

Further, the sound pressure boosting section 30 is formed in a rectangular tube shape composed of the flat tapered surfaces 31, 31, 31, ... so that the sound wave boosting section 30 can reflect a wide range of sound waves emitted from each part of the diaphragm 25. This is to enhance the sound reproducibility.

The horn portion 40 is provided at the front of the sound pressure boosting portion 30 so that the diameter thereof gradually increases toward the outside. The horn section 40 produces a so-called horn effect in which the sound waves densely compressed in the sound pressure boost section 30 are gradually diluted to expand the sound pressure.

It should be noted that, as in the embodiment, the horn section 40 may be formed into a rectangular tube shape in the vicinity of the joint portion (also referred to as “throat”) J of the sound pressure boosting section 30 so that the reflection of a wide range of sound waves in the above-mentioned frequency band is performed. It is desirable to improve the sound quality and the sound reproducibility. Further, in this case, as in the embodiment, the rectangular tube shape of the horn section 40 and the rectangular tube shape of the sound pressure boost section 30 may be matched.

[0014]

[Effect of device]

 As shown and described above, according to the present invention, a square cylinder-shaped sound pressure boosting section having a flat tapered surface is formed on the front side of the diaphragm of the speaker unit so that the aperture becomes smaller toward the front. The sound pressure boosting section has a horn section in the front that gradually increases in diameter toward the outside, so sound waves from the diaphragm, especially sound waves in the low-pitched area, are compressed and enhanced. The flat taper surface enhances the reproducibility of sound by increasing the reflectivity of sound waves with a wide frequency band.

As described above, according to the present invention, in this type of horn speaker, which has a problem in reproduction of sound particularly in the low range, it is possible to efficiently enhance the low range and widen the range of reproduction. It became so.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a main part of a horn speaker showing an example of the present invention.

FIG. 2 is a rear view of the sound pressure boost unit.

[Explanation of symbols]

 10 Horn Speaker 11 Speaker Box 20 Speaker Unit 25 Vibration Plate 30 Sound Pressure Boosting Section 31 Planar Tapered Surface 40 Horn Section

Claims (1)

[Scope of utility model registration request] 1. A sound pressure boosting section in the shape of a rectangular tube having a flat taper surface is formed on the front side of the diaphragm of the speaker unit so that the diameter becomes smaller toward the front section. A horn speaker structure characterized in that a horn portion having a caliber that gradually increases toward the outside is provided.