JPH07203583A - Speaker - Google Patents

Abstract

PURPOSE:To obtain a highly efficient speaker with high sound quality and with little distortion by forming a recessed part of specified shape on the whole surface of a diaphragm. CONSTITUTION:In a magnetic circuit 12, a magnet 10 is arranged in a york 9 and a plate 11 is provided at an upper part of the magnet 10 so as to constitute the magnetic circuit 12 where a magnetic gap 16 is formed. The peripheral part of the diaphragm 14 is combinated to the peripheral part of a frame 13 which is combinated at the upper part of the magnetic circuit 12, a voice coil 15 is combinated at a center part of the diaphragm 14 and the voice coil 15 is engaged in the magnetic gap 16 of the magnetic circuit 12. Then, the recessed parts with a two millimeter diameter and one millimeter depth are provided on the whole surface of the diaphragm 14 by the interval of one millimeter. Thus, the rigidity of the diaphragm 14 is enhanced, unrequired resonance is prevented and the distortion is reduced so that the highly efficient speaker with high sound quality can be obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a speaker used in various audio equipment.

[0002]

2. Description of the Related Art With the recent miniaturization of audio equipment, the space for mounting a speaker is also narrowed, and it is necessary to downsize and slim the speaker. Furthermore, a speaker with high sound quality and high efficiency is required.

A conventional speaker of this type will be described with reference to FIG. A magnet 2 is installed in the yoke 1, and a plate 3 is provided on the magnet 2 to form a magnetic circuit 4. A peripheral edge of a frame 6 connected to the upper portion of the magnetic circuit 4 is connected to a peripheral edge of a diaphragm 6 having a single curved surface, a voice coil 7 is connected to a central portion of the diaphragm 6, and the voice Coil 7
Is fitted in the magnetic gap 8 of the magnetic circuit 4, and the voice coil 7 is supported only by the diaphragm 6.

[0004]

However, in the diaphragm 6 constituted by a single curved surface like the above-mentioned conventional speaker configuration, the area of the diaphragm 6 is increased in order to improve efficiency, or the diaphragm is made slim. If the shape of the diaphragm 6 is elliptical for the purpose of achieving both high efficiency, the diaphragm 6 becomes insufficient in rigidity, causing unnecessary resonance and causing distortion. Particularly, in the case of an elliptical diaphragm, the occurrence of unnecessary resonance due to insufficient rigidity in the major axis direction has been a problem.

An object of the present invention is to solve the above conventional problems and to provide a speaker with low distortion, high sound quality and high efficiency.

[0006]

In order to achieve this object, the speaker of the present invention has a frame coupled to a magnetic circuit having a magnetic gap, and a voice coil fitted in the magnetic gap at the peripheral portion of the frame. By connecting the outer peripheral part of the diaphragm connected to the central part, the diameter of 2
mm and depth of 1 mm are formed at intervals of 1 mm.

[0007]

With the above structure, the rigidity of the diaphragm can be increased, unnecessary resonance can be prevented, distortion can be reduced, and a speaker with high sound quality and high efficiency can be provided.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to FIGS.
Will be explained.

FIG. 1 is a half sectional view of the speaker in the embodiment, and FIG. 2A is a plan view of a diaphragm used in the speaker.
2B is a half sectional view of the diaphragm, FIG. 3A is a second-order distortion frequency characteristic, and FIG. 3B is a third-order distortion frequency characteristic.

In FIG. 1, reference numeral 12 is a magnetic circuit. The magnetic circuit 12 has a magnet 10 installed in a yoke 9, and a plate 11 is provided on the magnet 10.
A magnetic circuit 12 having a magnetic gap 16 is formed. The peripheral edge of the diaphragm 14 is connected to the peripheral edge of the frame 13 that is connected to the upper portion of the magnetic circuit 12, and the voice coil 15 is connected to the central portion of the diaphragm 14, and the voice coil 15 is connected to the magnetic gap 16 of the magnetic circuit 12. It is inset.

Here, the diaphragm 14 of this embodiment is provided with dents having a diameter of 2 mm and a depth of 1 mm at intervals of 1 mm on the entire surface. Thereby, the rigidity of the diaphragm 14 can be increased, unnecessary resonance can be prevented, and distortion can be reduced. The distortion frequency characteristics are shown in FIG. 3. The dotted line shows the conventional speaker and the solid line shows the speaker of the present invention.

[0012]

As described above, according to the structure of the speaker of the present invention, the diaphragm area can be increased to improve efficiency, or the diaphragm shape can be elliptical to achieve both slimness and high efficiency. It is possible to increase the rigidity of the diaphragm, prevent unnecessary resonance, reduce distortion, and provide a speaker with high sound quality and high efficiency.

[Brief description of drawings]

FIG. 1 is a half sectional view showing a configuration of a speaker according to an embodiment of the present invention.

FIG. 2 (a) is a plan view of a diaphragm used for the speaker in the same embodiment. FIG. 2 (b) is a half sectional view of a diaphragm used for the speaker in the same embodiment.

FIG. 3A is a second-order distortion frequency characteristic diagram of the speaker according to the embodiment. FIG. 3B is a third-order distortion frequency characteristic diagram of the speaker.

FIG. 4 is a sectional view of a conventional speaker.

[Explanation of symbols]

 12 magnetic circuit 13 frame 14 diaphragm 15 voice coil 16 magnetic gap

Claims (3)

[Claims] 1. A frame is coupled to a magnetic circuit having a magnetic gap, and a peripheral portion of the frame is coupled to an outer peripheral portion of a diaphragm having a voice coil fitted in the magnetic gap at a central portion thereof. 2mm in diameter and 1 in depth
A speaker with 1 mm gaps formed at 1 mm intervals. 2. The speaker according to claim 1, wherein the diaphragm has an elliptical shape. 3. The speaker according to claim 1, wherein the material of the diaphragm is a resin film.