JPH0528875Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a novel structure of a horn speaker, particularly a horn.

(Prior Art) As shown in FIG. 2, a conventional horn speaker includes a driver consisting of a center pole 1, a bottom plate 2, a magnet 3, a bridge 4, a diaphragm 5, and others, a throat 6, an equalizer 7, a horn tube 8, It is composed of a horn consisting of a reflector 9, a horn mouth 10, and others.

When the diaphragm 5 vibrates due to the operation of the driver, the sound pressure vibration is emitted through the throat 6, horn tube 8, reflector 9, and horn mouth 10. The vibrations caused by the diaphragm 5 are collected at the throat 6, and an equalizer 7 is provided to adjust the vibration phase in the middle and high frequency ranges and improve the characteristics.

However, since sound pressure vibrations are concentrated at the throat 6, which has a cross-sectional area smaller than the area of the diaphragm 5, even if an equalizer 7 is provided, it is not possible to adjust the phase over a wide frequency range, and the characteristics in the mid-high range are disturbed. , causing attenuation of high frequencies.

(Purpose of the invention) The object of the invention is to provide a horn speaker with a novel structure without a throat portion, and to reduce the number of parts of the horn. Another purpose is to improve the frequency characteristics of the speaker by eliminating the throat portion.

(Structure of the invention) The invention comprises dome portions arranged at regular intervals on the outer surface of the dome-shaped diaphragm, and extending from near the periphery of the dome-shaped diaphragm to the horn opening to form the horn inner wall. a first member having integrally formed portions; and a first member disposed outside the first member;
A ring-shaped horn is formed around the periphery of the dome-shaped diaphragm by a second member forming an outer horn wall, the first member and the second member are bent backward in front of the diaphragm, and the second member is bent backward in front of the diaphragm. The second member is bent forward to form a reflector-type horn, and the sound pressure vibration of the diaphragm passes through the ring-shaped horn to the horn opening, collects at the horn opening, and outputs it to the front of the speaker. This is a throatless type horn speaker.

Further, the first member is characterized by a structure in which a cover is provided at the front end of the inner wall leading to the horn opening.

(Embodiment) In FIG. 1, 11 is a bottom plate type center pole, 12 is a magnet, 13 is a bridge, 14 is a dome-shaped diaphragm, and 15 is a voice coil bobbin. The driver is configured by the components 11 to 15 above.

In order to form a ring-shaped horn, 16 extends from the periphery of the diaphragm to the horn opening and becomes the inner wall of the horn.
This member constitutes a reflector in this embodiment. Reference numeral 17 denotes a second member serving as an outer wall of the horn, which constitutes a horn mouth in this embodiment. In the case of the present invention, the reflector 16 has a dome portion 18 in the center thereof, which is disposed outside the dome-shaped diaphragm 14 at equal intervals from the diaphragm 14.
Therefore, there is a central recess 19 in front of this dome portion 18.
is formed. This reflector 16 has three or more screw-fastening ribs 20 integrally formed at the bottom of its outer periphery. A boss 21 is integrally formed on the bottom wall of the horn mouth 17 opposite to the rib 20.

The horn mouth 17 has a folded part 22 integrally with the reflector 16 at the periphery of the diaphragm 14 to form a folded horn. In order to increase the mechanical strength of the folded part 22 and to prevent vibrations due to sound pressure vibration, the inner edge side tip 23 of the folded part 22 is pressed against a driver and preferably bonded. At the same time, a rib 24 is provided on the oblique side of the folded portion 22. An assembly ring 25 is fitted into the driver, and the top and side surfaces of this ring 25 abut against the tip and side surfaces (including the notched side surfaces of the oblique sides) of the rib 24 to center the horn mouth 17.

In this embodiment, the central recess 19 of the reflector 16
An electronic circuit such as an amplifier and a transformer (not shown) are built in, and the input/output lines of the electronic circuit and transformer are connected to the hole 26 provided in the inner wall forming the central recess.
through the horn mouth 17
It is led out to the outside through a hole 27 provided in the bottom wall. In order to prevent sound leakage from the holes 26 and 27, after passing the input and output lines, the holes 26 and 27 are closed with adhesive or the like. A cover 30 is provided on the front edge of the central recess 19 for aesthetic reasons and to improve frequency characteristics.

In the embodiment shown in FIG. 1, a cover 31 is provided behind the speaker to house a power supply section such as a battery, operation sections such as a power switch, a volume control section, and an amplifier. This cover 31 is provided with a nut 33 to which a mounting fitting 32 is attached.

Reflector 16, horn mouth 17 and cover 3
1 is tightened and fixed with a tap screw 34.

(Effect of the invention) In the present invention, a ring-shaped horn is formed around the periphery of the diaphragm 14 by the reflector 16 and the horn mouth 17, and the sound pressure vibration from the diaphragm 14 reaches the horn opening through this ring-shaped horn. are collected and released. Therefore, the phases of the sound pressure vibrations are aligned and there is little mutual interference, so the frequency characteristics become flatter, the sound pressure level in the high frequency range increases, and the frequency characteristics are improved. In the present invention, the above effects can be obtained whether the annular horn is circular or square.

Furthermore, since the horn of the present invention is composed of two parts, the reflector 16 and the horn mouth 17, the conventional horn is composed of five parts: the slot 6, the equalizer 7, the horn tube 8, the reflector 9, and the horn mouth 10. The number of parts can be significantly reduced compared to

In the embodiment of the present invention, a cover 30 is attached in front of the central recess 19 of the reflector 16, but the frequency characteristics without the cover are as shown in FIG.
The frequency characteristics with the cover 30 are as shown in FIG. Cover 30 from the comparison between Figures 3 and 4.
The characteristics are improved if there is one.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view of an embodiment of the throatless type horn speaker of the present invention, Fig. 2 is a cross-sectional view of a conventional horn speaker, Fig. 3 is a frequency characteristic diagram without a cover, and Fig. 4 is a cover. A frequency characteristic diagram when there is 30 is shown. 14 is a diaphragm, 16 is a reflector, and 17 is a horn mouth.

Claims (1)

[Claims for Utility Model Registration] 1. Dome portions arranged at regular intervals on the outer surface of the dome-shaped diaphragm, and extending from near the periphery of the dome-shaped diaphragm to the horn opening to form an inner horn wall. The first part is formed integrally.
and a member disposed outside the first member,
A ring-shaped horn is formed around the periphery of the dome-shaped diaphragm by a second member forming an outer horn wall, the first member and the second member are bent backward in front of the diaphragm, and the second member is bent backward in front of the diaphragm. The second member is bent forward to form a reflector-type horn, and the sound pressure vibration of the diaphragm passes through the ring-shaped horn to the horn opening, collects at the horn opening, and outputs it to the front of the speaker. Throatless type horn speaker. 2. The throatless type horn speaker according to claim 1, wherein the inner wall of the first member is provided with a cover at the front end thereof reaching the horn opening.