JPS6338633Y2 - - Google Patents

Description

[Detailed description of the invention] This invention has a double dust net with ventilation provided on the reinforcing diaphragm and the dust cap to provide ventilated air damping. This invention relates to improvements to speakers that suppress the inherent split resonance that occurs in the high frequency range.

Conventional reinforcing diaphragms are made of hard materials to provide rigidity in order to improve high-frequency characteristics and directional characteristics, but this reinforcing diaphragm eliminates internal air resonance. For this purpose, a hole in the center is closed with a coarse cloth or the like. This results in poor braking, which is the cause of unique peaks and dips in the frequency characteristics, as shown by the broken line in FIG.

In order to improve the above-mentioned drawbacks, the perforations of the reinforcing diaphragm were blocked with cloth, etc. with poor breathability, but this also resulted in stronger air damping, resulting in split resonance and an increase in distorted noise. This caused performance problems.

This invention uses a double air-permeable dust net between the reinforcing diaphragm and the dust cap to close the dust net, and simultaneously provides mechanical air damping to each part of the dust net. The above drawbacks are improved by suppressing the inherent split resonance caused by air damping in the direction of the shape of the dust cap.

Embodiments of the present invention will be described below with reference to the drawings. 1st
In the figure, 1 is the yoke of the speaker, 2 is a center pole integrated with this yoke 2, 3 is a permanent magnet, 4 is a plate, 5 is a frame fixed to this plate, 6 is a voice coil, and 7 is this voice coil. 8 is a reinforcing diaphragm, 9 is a through hole provided in the center of this spider, 10 is a breathable dust net that is closed to this through hole, 11 is a dust net, and there is a spider on the top of this spider. It has a double-closed structure with a breathable dust cap. 12 is a diaphragm, and 13 is an edge that supports this diaphragm.

In this way, it is closed by the reinforced diaphragm 8 and the double dust net 9 with air permeability of the dust cap.
The speaker, which has mechanical air damping on each part at the same time, uses this action to move from the central part of the reinforcing diaphragm 8 toward the shape of the upper dust cap, thereby reducing the inherent vibration caused by the air damping. As can be seen from the frequency characteristic diagram shown in FIG. 2, which compares the conventional example and the embodiment of the present invention, the split resonance is suppressed.

As explained above, according to the present invention, a flat frequency characteristic can be obtained due to the double ventilation suppression of the reinforcing diaphragm and the dust cap, so it has a great practical effect.

[Brief explanation of drawings]

FIG. 1 is a vertical cross-sectional view of a speaker according to an embodiment of the present invention, and FIG. 2 is a diagram of each frequency characteristic curve of the conventional speaker and the speaker shown in FIG. In the figure, 8 is a reinforcing diaphragm, 9 is a through hole provided in the center of this plate,
10 is a dust net, and 11 is a dust net that is double-blocked with this dust door 10.

Claims (1)

[Scope of utility model registration request] In a speaker in which a cone-shaped diaphragm is supported by a voice coil,
A substantially conical reinforcing diaphragm is provided on the outer periphery of the tip of the voice coil, a breathable dust net is fixed to a transparent hole in the substantially center of the reinforcing diaphragm, and the upper part thereof is double closed with a breathable dust cap, A speaker characterized by being fixed to the diaphragm described above.