JPS58177100A - Speaker - Google Patents

Abstract

PURPOSE:To improve the frequency characteristics, by coupling a circumferential ridge of a cone shaped diaphragm on the front and back sides of which damping sheets having different area are sticked and coupling a voice coil inserted to a magnetic gap of a magnetic circuit at the center. CONSTITUTION:Damping sheets 13a, 13b made of rubber are stuck over a center part to a middle part of the front and back sides of a diaphragm 8, and for example, a sheet 13a is smaller in the area than a sheet 13b. Thus, the damping effect of the diaphragm 8 is improved remarkably in comparison with the damping sheet only on one side. In the frequency characteristics, the characteristics of low frequency sound is extended and those in medium and high frequencies are made stable remarkably.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a speaker used in various types of audio equipment.

Generally, a speaker is constructed as shown in FIG.

That is, a frame 6 is coupled to a magnetic circuit 5 configured by arranging a ring-shaped magnet 3 and a ring-shaped upper plate 4 on a plate 2 having a center pole 1, and a gasket 7 and a gasket 7 are attached to the periphery of the frame 60. The periphery of a cone-shaped diaphragm 8 is bonded by adhesive or the like, a voice coil 9 is coupled to the center of the diaphragm 8, and the middle portion of the voice coil 9 is held by a damper 1o.
The lower part of the voice coil 9 is fitted into the magnetic gap 11 of the magnetic circuit 6 without eccentricity, and the dust cap 12 is attached to the upper surface of the central part of the moving plate 8.

In order to achieve excellent bass reproduction in such speakers, conventionally a damping sheet 13 made of rubber or the like is attached to the middle part of the diaphragm 8, as shown in FIG.
As shown in FIG. 3, the diaphragm 8 was coated with a high specific gravity paint 14, and as shown in FIG. 4, a weight ring 15 was attached to the top of the voice coil 9.

In order to suppress the split resonance of the diaphragm 8 and obtain sound pressure frequency characteristics with less disturbance with such a configuration, it is preferable to attach the damping sheet 13 to the middle part of the diaphragm 8, which has excellent design freedom. However, it was not completely satisfactory. That is, the sound pressure frequency characteristics had many peak dips in the reproduction band above the middle range.

The present invention eliminates the above-mentioned conventional drawbacks, and aims to provide a speaker that has excellent bass reproduction and has flat and stable sound pressure frequency characteristics in the mid-high range and above. It is.

In order to achieve the above object, the present invention is characterized in that braking sheets with different areas and high specific gravity are attached to the front and back surfaces of the diaphragm.

Embodiments of the present invention will be described below with reference to FIG. 5.

Note that the overall configuration of the speaker is substantially the same as that described in FIG. We will only explain the vibration system parts that characterize the watch.

In FIG. 5, braking pads 12a and 13 are made of rubber or the like on the front and back surfaces of the diaphragm 8 from the center to the middle.
4) is attached.

This front brake seat 13a is the rear brake seat 13b.
It has a smaller area.

However, the sizes of the brake sheets 13a and 13b may be reversed and may be determined based on the appearance quality.

The thickness and total area of the braking sheaths) 13a and 13b are determined by the design value of the additional mass and the design of the vibration surface damping.In this way, the braking sheaths) 13a are applied to both sides of the diaphragm 80.

By pasting 13b, the braking effect is significantly improved compared to the one pasted on one side, and the braking effect on the front and back surfaces (13a)
, 13b have different areas, the position of the added mass does not change suddenly, and even if a large mass is added, the characteristics are not adversely affected.

The sound pressure frequency characteristics of the speaker of the present invention are as shown by A in FIG. Compared to the speaker with characteristic C, the bass range is extended, and the midrange and above are extremely stable.

As described above, since the speaker of the present invention uses damping sheets with different areas attached to the front and back surfaces of the diaphragm, the damping effect is significantly improved, and the sound pressure frequency characteristics in the midrange and above are flat and stable. As a result, the bass range is extended, and the efficiency does not drop significantly due to the addition of mass, making it highly reliable, making it an industrial value dog.

[Brief explanation of the drawing]

Figure 1 is a half-sectional view of a typical speaker, and Figures 2 to 4 are half-sections of conventional speaker vibration system parts.
Magnetic circuit, 6...Frame, 8...Diaphragm, 9...Voice coil, 10...
Damper, 11...Magnetic gap, 12...
...Dust cap, 13a, 13b... Brake point 0 Name of agent Patent attorney Satoshi Nakao and 1 other person Figure 1

Claims (1)

[Claims] The periphery of the frame connected to the magnetic circuit is connected to the periphery of a cone-shaped diaphragm with braking sheets of different areas pasted on the front and back surfaces from the center to the middle. A speaker that combines a voice coil that fits into the magnetic gears of the circuit.