JP2001346284A - Loudspeaker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a loudspeaker that allows a listener to appreciate substantial music without running-in immediately after turning on of a switch by early removing moisture of cone paper of a loudspeaker unit. SOLUTION: The loudspeaker 10 has a heater 12 provided in an enclosure 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a loudspeaker in which the tone of a loudspeaker is improved, and in particular, the elimination of sound is improved by reducing the weight of a vibrating portion of the loudspeaker.

[0002]

2. Description of the Related Art FIG. 5 is a cross-sectional view showing a speaker unit of a speaker used in audio equipment. A speaker unit 1 is connected to and fixed to a speaker enclosure or the like, and is connected to the frame 2. A yoke 3, a plate 4, and a magnet 5, which constitute a magnetic circuit, a voice coil 6 which vibrates with respect to the magnetic circuit by passing an electric current, and a diaphragm which vibrates with the voice coil 6 to emit sound. It comprises a cone paper 7, a sub-cone or W-cone paper 8, and a center cap 9.

[0003] Compared with speakers used in other applications, these audio speakers prefer the sound itself to human hearing, have a high taste, and are more faithful to the original sound or more comfortable to the ear. Various ideas have been applied to feel.

As an example, various new materials have been tested on the diaphragm of the speaker unit 1 in place of the cone paper 7 in order to improve the frequency characteristics and the output sound pressure level (efficiency). ing.

[0005] By the way, even if the frequency characteristics and the output sound pressure level are improved by using a new material for the diaphragm, there is a case where the sound is heard to be duller than the conventional one when heard by ear. Was.

Since the diaphragm (cone paper 7) of the speaker vibrates 20,000 times per second, it is better that the movable part including the voice coil 6 and its winding is as light as possible. This is because, even if a new material having an effect of improving the efficiency is used for the diaphragm, the equivalent mass (m0) becomes large.

The equivalent mass (m0) is the sum of the mass of the vibration system and the resistance of the air before and after the diaphragm. When the equivalent mass increases, the sound response is slightly changed due to a subtle difference in the vibration response. Feels worse.

For example, even with speakers of the same size, the equivalent mass of the vibration unit is reduced from 6.9 g to 7.0 due to the addition of a titanium dome due to a model change.
g increased by 0.1 g to some speakers, and the sound of cymbals and violins appeared to be muddy.

Further, two speaker units made by the same manufacturer and having the same diameter and almost the same frequency characteristics also use a heat-resistant new material made of polyimide (plastic) and have an equivalent mass of 7.1 g, which is equivalent to ordinary paper. The difference between 6.9g and just 0.2g is that using, but the sound quality is so different that anyone can hear that normal paper is better.

[0010] By the way, it has been a conventional theory that in an audio apparatus, a sound is better when the amplifier is turned on before the amplifier is used and warmed up.

Recently, it has been considered that it is better to input a music signal, output sound from a speaker, and move a movable portion of the speaker, such as a voice coil, sufficiently to allow the speaker to break in.

This is because, since the material of the cone paper 7 is mainly made of paper pulp, it is easy to absorb moisture. Before sounding, it absorbs moisture and becomes heavy to increase the equivalent mass. Make a sound from
It is considered that the mass of the cone paper 7 is reduced after the break-in, the equivalent mass is reduced, and the sound loss is improved.

The principle is that since the winding (enameled wire) of the voice coil 6 and the like has a resistance R, the music is generated, and the heat generated by the power consumption of W = V ² / R (efficiency 90
With a speaker of dB / w, about 1% efficiency and 99% becomes heat), the voice coil 6 generates heat, and this heat evaporates the moisture contained in the cone paper 7 to make it lighter. .

[0014]

However, the fact that the original tone cannot be played unless the sound is output from the speakers for a predetermined time after the switch of the amplifier is turned on means that the music can be viewed under the optimum conditions. You will always be waiting, and at first you will be watching the music played for break-in.

Further, the speaker enclosure is formed in a plate box shape mainly using wood, but since this wood absorbs moisture, the inside of the enclosure is always humid. When not used, the cone paper is always used. You will be exposed to moisture, which will increase the time for break-in.

Furthermore, due to the moisture in the enclosure,
Mold may develop within the enclosure and over time these molds may affect the tone and cause undesired aging.

The specifications such as frequency characteristics described in a speaker catalog or the like are measured in a place where there is no moisture, whereas a place where the user actually uses the apparatus generally has a lot of moisture. It was used under the worst conditions and catalog specifications were rarely obtained.

Therefore, an object of the present invention is to solve the above-mentioned problems, to reduce the equivalent mass by removing the moisture of the cone paper, and to immediately enjoy the original music without running-in immediately after turning on the switch. It is to provide a speaker that can do.

[0019]

In order to solve the above-mentioned problems, the present invention is a speaker provided with a heating element in a speaker enclosure.

The heat generated by the heating element allows the moisture of the cone paper of the speaker unit to evaporate. As a result, the original tone of the speaker can be obtained from the beginning without the need to break in the speaker by the music signal. Become.

The position of the heating element is not particularly limited as long as it is within the enclosure of the speaker, but it is particularly effective if it is provided near the speaker unit or directly provided on the speaker unit.

The heating element may be an incandescent light bulb. The incandescent light bulb in the enclosure emits light and generates heat at the same time. This heat causes the moisture in the cone paper to evaporate at an early stage, and the heating element is inserted. This produces the same effect as described above.

In addition to the above-mentioned effects, when the incandescent lamp is made to emit light, light is transmitted through the cone paper or light leaks from a hole formed in a bass reflex enclosure when the incandescent lamp emits light. Thus, especially in a dark room, the visual effect of the loudspeaker due to the light will produce a decorative effect.

Furthermore, the air containing moisture evaporated by the heating element and the incandescent lamp rises because it is warmed, and gathers in the upper part of the enclosure. If a hole for a bass reflex is provided in the upper part of the enclosure, The bass reflex hole facilitates the exchange of external air with internal moist air due to the vibration of the air during the bass of the music.

[0025]

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

FIGS. 1A and 1B show a speaker 10 of the present invention, wherein FIG. 1A is a front view and FIG. 1B is a side sectional view.

A speaker unit 1 and a bass reflex hole 12 are provided in a box-shaped enclosure 11, and a heating element 13 is provided near a back surface of a magnet of the speaker unit 1.

In FIG. 1B, the position of the heating element 13 is determined by the heating element 13a below the magnet and the heating element 13 above the frame.
As shown in b, it may be attached anywhere without being limited to the back surface of the magnet.
The speaker unit 1 may be mounted anywhere as long as it has an effect of warming the speaker unit 1 in the enclosure 11, and the number of heating elements 13 is not limited to one, and a plurality of heating elements 13 may be provided.

The heating element 13 requires a dedicated power supply for heat generation, but a household AC 100 V can be used. As shown in FIG. Power through a 100 VAC outlet.

FIGS. 2A and 2B show an example of the heating element 13. As shown in FIG. 2A, an aluminum square pipe 16 (eg, 12 × 12 mm) in consideration of thermal conductivity is used. Square, 1mm
A resistor 17 (for example, 2 kΩ 5 W) is put in the thickness, and the gap is filled with silicon caulking 18 also serving as insulation, and a flange 19 is attached to one surface of the square pipe, and a hole is made here to make a speaker unit. It is designed to be screwed to a predetermined part.

Note that a non-combustible resistor can be used as the resistor 17. In this case, even if the resistor is overheated due to misuse, the resistor itself will be disconnected like a fuse, thus enhancing safety.

FIG. 2B shows a case where a cement resistor 20 (eg, 1 kΩ 10 W) is used as the heating element 13. In the case of the cement resistor 20, the cement resistor 20 is bonded to a predetermined position near a speaker unit by silicon caulking.

FIG. 2 shows an example of the heating element 13.
(A) and (B) are not limited to those shown in (B), and various types may be used as long as they generate heat by electricity.

Further, the method of attaching the heating element 13 is not limited to the above-described method, and various methods such as attachment using a nylon strap can be used.

The amount of heat generated by the heating element 13 depends on the mounting location, but the effect is generated by heat that raises the inside of the enclosure 11 by about 2 to 5 ° C. higher than the outside air temperature.

The heating element 13 is an audio (speaker)
Always power the speaker unit when not in use, always keep the speaker unit warm, switch on the audio, and immediately enjoy the original excellent music without breaking in with dry, light cone paper be able to.

Table 1 shows the wattage suitable for the diameter of the speaker when the heating element 13 is always supplied with electricity. The resistance value in Table 1 is a resistance value of the heating element for obtaining a predetermined wattage when using a household 100V power supply.

[0038]

[Table 1]

It is to be noted that, even if the heating element 13 is not turned on at all times, even if the heating element 13 is heated only when listening to music, there is an effect that the break-in time can be shortened as compared with the conventional one.

However, in this case, in order to produce an effect in a short time, the heating wattage of the heating element 13 must be higher than that in the case of constant power supply. A temperature adjustment method is required so as not to be too high.

The temperature can be adjusted by using a bimetal for the heating element to adjust the temperature to an appropriate value, or by using a type in which the resistance value increases as the temperature increases.
Alternatively, the adjustment may be performed by automatically cutting off the power supply to the heating element using a timer.

FIG. 3 shows an example of the speaker 10 using an incandescent lamp 21 as a heating element. Since the incandescent lamp 21 generates heat when emitting light, this heat is used to evaporate the moisture of the cone paper. Can be used.

If the mounting location is provided on the bottom surface of the enclosure 11 of the speaker 10, the heated air rises due to the heat generated by the incandescent lamp 21, and the raised warm air comes into contact with the speaker unit 1 and the cone is formed. Let the paper dry.

The light of the incandescent lamp 21 or the reflected light leaks from the cone paper or the bass reflex hole 12 of the speaker unit 1 due to the light emission of the incandescent lamp 21 to produce a visual decoration effect.

The wattage of the incandescent lamp 12 in the case where the light is constantly emitted may be as shown in Table 2 below, depending on the aperture of the speaker unit 1 used.

[0046]

[Table 2] Speaker diameter Wattage of incandescent light bulb (in case of constant light emission) 8-16cm 5W 20-38cm 10W

In the case where the incandescent lamp 12 is used, as in the case of the heating element 13 in FIG. 1, the light may be emitted only at the time of use without constantly emitting light. The light may be turned off by a timer or the like, but it is preferable that the light is always emitted during use of the speaker in consideration of the visual decoration effect by the light emission of the incandescent lamp 12.

FIG. 4 shows another example of the present invention, in which a hole 12 for a bass reflex is provided in an upper part in an enclosure 11.

Since the mass of the air heated by the heating element 13 (or the incandescent lamp 21) is reduced and is collected at the upper part of the enclosure 11 of the speaker 10, the bass reflex is provided every time a low tone is generated. Through the holes 12, the inside air is replaced by the outside dry air, so that moisture can be driven out of the enclosure 11 faster.

[0050]

As described above, according to the loudspeaker of the present invention, the sound of the loudspeaker is immediately turned on without turning in the audio device, and the sound coming out of the loudspeaker immediately becomes glossy and smooth. That is, by driving the voice coil 6 that emits a harmonic component from the sub-cone or W-cone paper 8 and the center cap 9 shown in FIG.

Further, by making the heating element generate heat at all times or during use, it is possible to prevent the wooden enclosure from deteriorating by absorbing moisture for many years, and to produce a sound similar to a new one for many years. Will be able to get out.

Further, it was found that if the speaker was heated, a high temperature could be stably output. In other words, conventional speakers cannot output treble stably, so a tweeter for treble had to be added even for a size of about 12 cm. A full-range speaker is sufficient, and a network that causes distortion is not required.

When the heating element is an incandescent lamp, light or reflected light of the incandescent lamp leaks from the cone paper or the bass reflex hole of the speaker unit, and a decorative effect is produced.

Further, by providing a bass reflex hole at the top of the enclosure, the air warmed by the heating element or the like is replaced with the outside air every time a low sound is emitted, and the moisture inside the enclosure can be efficiently exhausted. it can.

[Brief description of the drawings]

FIG. 1 shows a speaker according to the present invention, wherein (A) is a front view and (B) is a side sectional view.

FIG. 2A is a front sectional view showing an example of a heating element of the present invention, and FIG. 2B is a front view showing another example of a heating element of the present invention.

FIG. 3 is a side sectional view of another example of the speaker of the present invention.

FIG. 4 is a side sectional view of another example of the speaker of the present invention.

FIG. 5 is a side sectional view of the speaker unit.

[Explanation of symbols]

 Reference Signs List 1 speaker unit 2 frame 3 yoke 4 plate 5 magnet 6 voice coil 7 cone paper 8 sub-cone or W-cone paper 9 center cap 10 speaker 11 enclosure 12 hole for bass reflex 13 heating element 14 power cord 15 plug 16 aluminum square pipe 17 Resistance 18 Silicon caulking 19 Tsuba 20 Cement resistance 21 Incandescent light bulb

Claims (3)

[Claims] 1. A speaker, wherein a heating element is provided in an enclosure of the speaker. 2. The speaker according to claim 1, wherein the heating element is an incandescent lamp. 3. The speaker according to claim 1, wherein a hole for a bass reflex is provided in an upper portion of the enclosure of the speaker.