JP2002345081A - Multi-mode device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a multi-mode deice with a flat characteristic for a reproduction frequency from a middle to a high frequency in order to clearly reproduce music with articulation. SOLUTION: The multi-mode device comprising a magnetic circuit, a diaphragm, a coil fixed to the diaphragm is characterized in that the diaphragm is configured to have a honeycomb corrugation. The honeycomb corrugated acts like an equalizer to make flat the reproduction band from the middle to the high frequency.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-mode device having a speaker function, which is suitable for use in general home appliances such as portable devices, video games, personal computers, and the like.

[0002]

2. Description of the Related Art A normal multi-mode device emits sound by a diaphragm, a voice coil, and a magnetic circuit. However, the combination of the voice coil and the magnetic circuit forms an inductance. FIG. 4 is a diagram showing sound pressure versus frequency characteristics of a conventional multimode device. As shown in FIG. 4, the characteristic has a high rise from the middle range to the high range.

[0003]

In the conventional multi-mode device described above, when a human voice, music, or the like is heard, only the high frequencies are emphasized, so that the sound is not distorted. . There was no problem with the playback band as a so-called telephone with a narrow playback band,
Considering the melody distribution and music distribution by a mobile phone these days, it is expected that the reproduction characteristics will be insufficient in the above-mentioned reproduction frequency band.

In order to listen to music with a device having such characteristics, it is necessary to correct the acoustic characteristics with a processor such as a DSP (Digital Signal Processor), and to obtain flat characteristics as a result. Another problem is that the more frequently the DSP is used, the higher the power consumption.

Accordingly, it is an object of the present invention to provide a multimode device having a flat reproduction characteristic from a middle frequency to a high frequency in order to perform music reproduction clearly and clearly.

[0006]

In order to improve the acoustic characteristics and reduce the power consumption of the DSP, it is necessary to make the characteristics of the multimode device itself as flat as possible. As a method for solving the above-described problem, an object is to provide a multi-mode device having a diaphragm having honeycomb-type corrugation.

[0007] Honeycomb-type corrugations do not operate from low to mid-low frequencies, but act as a kind of equalizer from mid-high to high frequencies. For this reason, the so-called high rise characteristic peculiar to the dynamic type speaker is suppressed, and it becomes possible to realize a flat characteristic from the middle range to the high range. In addition, since the operating frequency of the honeycomb-type corrugation can be changed depending on the magnitude of each one, for example, the diameter of the corrugation is one.
Since a 5-mm speaker tends to generate resonance in a high frequency range, it is possible to suppress high-frequency resonance by reducing the corrugation.

That is, the present invention provides a magnetic circuit, a diaphragm,
In a multimode device including a coil fixed to the diaphragm, the magnetic circuit is flexibly supported by a suspension, and the diaphragm is
This is a multi-mode device in which a diaphragm partially has a honeycomb-type corrugation structure.

In the present invention, the vibrating plate has a two-layer structure, one layer is a flat plate-like shape, and the other layer is a honeycomb-type corrugated shape. ,
This is a multi-mode device that acts as an equalizer that flattens the reproduction band from the middle band to the high band.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A multi-mode device according to an embodiment of the present invention will be described below.

FIG. 1 is a sectional view of a multimode device according to an embodiment of the present invention. In FIG. 1, 1 is a permanent magnet, 2 and 3 are yokes, 4a is a flat portion of a diaphragm,
b is a honeycomb corrugation structure portion of the diaphragm, 5 is a coil, 6 is a suspension, 7 is a support, and 10 is a holding portion.

The magnetic circuit composed of the permanent magnet 1 and the yokes 2 and 3 is flexibly supported by the suspension 6. The coil 5 is fixed to the honeycomb-type corrugation structure portion 4b of the diaphragm,
A part of the coil 5 is located in the gap of the magnetic circuit.

Here, in the multi-mode device of FIG. 1, the diaphragm is formed by bonding a flat portion 4a of the diaphragm and a honeycomb type corrugation structure portion 4b.

Here, the honeycomb-type corrugation structure portion 4b does not act from the low band to the middle and low regions, but acts as a kind of equalizer from the middle to high regions. For this reason, the so-called high rise characteristic peculiar to the dynamic type speaker is suppressed, and it is possible to realize a flat characteristic from the middle range to the high range.

Further, since the operating frequency of the honeycomb-type corrugation structure portion 4b can be changed depending on the size of each of them, for example, a speaker having a diameter of 15 mm tends to resonate in a high frequency range. By reducing the corrugation, high-frequency resonance can be suppressed.

FIG. 2 is a plan view showing a honeycomb type corrugation structure portion 4b according to the embodiment of the present invention. FIG. 3 shows a sound pressure versus frequency characteristic of the multimode device according to the embodiment of the present invention.

The multi-mode device having a speaker function according to the present invention can be used in a device without changing the configuration of the device, since the same usage method as that of a normal speaker is possible. . In particular, since it is not necessary to correct the frequency characteristics, this method is optimal for a small portable device that requires a long-time battery drive or a device that needs to reduce the size of the battery itself.

[0018]

According to the present invention, it is possible to provide a multi-mode device having a flat reproduction characteristic from a middle frequency to a high frequency in order to reproduce music clearly and clearly.

[Brief description of the drawings]

FIG. 1 is a sectional view of a multimode device according to an embodiment of the present invention.

FIG. 2 is a plan view of a honeycomb-type corrugation structure according to the present invention.

FIG. 3 is a diagram showing sound pressure versus frequency characteristics of the multimode device according to the embodiment of the present invention.

FIG. 4 is a diagram showing sound pressure versus frequency characteristics of a conventional multimode device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Permanent magnet 2 Yoke 3 Yoke 4a Flat part of diaphragm 4b Honeycomb corrugation structure part of diaphragm 5 Coil 6 Suspension 7 Support base 10 Holding part

Claims (2)

[Claims] 1. A multi-mode device comprising a magnetic circuit, a diaphragm, and a coil fixed to the diaphragm, wherein the magnetic circuit is flexibly supported by a suspension, and the diaphragm is And a diaphragm having a honeycomb type corrugation structure in part. 2. The diaphragm has a two-layer structure, one layer has a flat plate shape, and the other layer has a honeycomb type corrugation shape, and the diaphragm has a mid-range structure. The multi-mode device according to claim 1, wherein the multi-mode device acts as an equalizer that flattens a reproduction band up to a high frequency band.