JPS6338398A - Headphone - Google Patents

Abstract

PURPOSE:To improve the adhesion properties between an ear and a headphone and to reduce the sound leakage by providing the elastic expanded polymer at the outer circumference of a speaker and the peripheral part of the front face of a diaphragm. CONSTITUTION:The elastic expanded polymer 1 is provided at the periphery of a speaker as well as the outer circumference part of a protector. The polymer 1 receives the instant pressure and the original form of the polymer 1 is defirmed. However the original form of the polymer 1 is recovered in about 45 seconds. Thus the polymer 1 is deformed into a smeller shape by hands and put into an ear. Then the polymer 1 becomes gradually larger in the ear and then adhered to the ear. Thus the sound leakage is reduced. Thus the reproduction is possible down to a low range. Here the polymer 1 can be changed into an ellipse from an ordinary circle concentrical with a speaker in accordance with a ratio between the length and the width of an ear. In such a way, the sound leakage is reduced less. Then the reproduction is possible with a low band and also the attachment feeling is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to headphones with excellent low frequency reproduction and wearability.

2. Description of the Related Art In recent years, headphones have come into widespread use as cassette tape recorders and A-1 compact disc players have become smaller. (For example, Takeo Yamamoto, “Speaker System (Part 2),” Radio Gijutsusha, p. p.

479-p, p, 504).

Hereinafter, an example of the above-mentioned conventional hesodophone will be described with reference to the drawings.

FIG. 3 is a sectional view showing the structure of a conventional headphone. In FIG. 3, 2 is a yoke, 3 is a magnet, and 4 is a plate, and these three components constitute a magnetic circuit. Reference numeral 5 denotes a diaphragm, which is integrated with the voice coil 6 and is installed in the magnetic gap in the magnetic circuit.

This yoke 2. Magnet 3. Plate 4 and diaphragm 5. The parts of the voice coil 6 form a speaker.

8 is a code for transmitting electrical signals.

9 is a rubber ring for attachment. A protector 10 protects the diaphragm 5.

The operation of the headphones configured as described above will be described below.

The signal transmitted from the cord 7 is guided to the voice coil 6 without changing the signal. The voice coil 6 has a yoke 2, a magnet 3. It is installed in the magnetic gap of the magnetic circuit consisting of the plate 4. Therefore, the electric signal flowing through the voice coil 6 crosses the magnetic field, and force is transmitted to the diaphragm 5, thereby emitting sound.

The magnetic circuit and the protector 10 are formed by a circular rubber ring 9.
It is fixed to the case 8 via. The headphones configured as described above are worn on the ears to listen to sounds, music, etc.

Problem to be Solved by the Invention (7) However, when the above-mentioned configuration is worn in the ear, sound leaks through the gap between the ear and the headphones, reducing the low-frequency reproduction ability. There is a problem in that headphones are uncomfortable to wear due to individual differences in size, and there is a need for the development of headphones that are particularly good at reproducing low frequencies.

In view of the above problems, the present invention provides headphones that are excellent in low frequency reproduction regardless of individual differences in ear size.

Means for Solving the Problems In order to achieve the above object, the hesodophone of the present invention includes a case for fixing the periphery of the diaphragm of the speaker, and a protector for covering the front surface of the diaphragm. The structure is such that an elastic foam polymer is provided around the periphery of the case corresponding to the circumferential direction and on the outer periphery of the protector other than the center part, which takes a longer time to return to its original shape than it takes to deform under pressure.

Function The present invention, with the above-described configuration, can reduce sound leakage during installation, and can reproduce low frequencies.

EXAMPLE Hereinafter, a headphone according to an example of the present invention will be described with reference to the drawings.

FIG. 1 shows the configuration of headphones in an embodiment of the present invention. In FIG. 1, 1 is an elastic foam polymer for attachment. 2 is a yoke, 3 is a magnet, and 4 is a plate, and these three parts form a magnetic circuit. 6 is a diaphragm, which is integrated with the voice coil 6. 1, 7 is a cord for transmitting electrical signals, and 1o is a protector that protects the diaphragm 6. These parts are included in the case 8. is fixed.

In addition, York 2. Magnet 3. Plate 4. Vibration plate 6
1 voice coil 6, code 71 case B.

Each component of the protector 10 has the same configuration as the conventional example.

Regarding the headphones configured as above, the following is the first part.
The operation will be explained using FIG.

Figure 2a is a front view showing the concha length and concha width of the ear;
The figure is a front view showing the shape of an elastic foamed polymer.

The electrical signal transmitted from cord 7 without being switched is sent to yoke 2. Magnet 3. Plate 4. It is guided to a speaker consisting of a 5° diaphragm and a voice coil 6. The principle operation here is exactly the same as the conventional example.

The difference from the conventional example is the area around the speaker and the protector 1.
For example, Japanese Patent Application Laid-Open No. 48-60S88
An elastic foamed polymer (hereinafter simply referred to as polymer) 1 disclosed in the above publication is provided. Even if this polymer 1 is deformed by instantaneous pressure, it will return to its original shape in about 45 seconds. When this polymer 1 is shaped into a small shape by hand and then worn on the ear, it becomes larger over time and comes into close contact with the ear.

Therefore, sound leakage is reduced and reproduction is possible at low frequencies.

Here, the polymer 1 was formed into a ring shape concentric with the speaker, but as shown in Fig. 2a, the polymer 1 was made into a ring shape that corresponds to the ratio of the concha length to the concha width W, as shown in Fig. 2a. By making it into an elliptical shape as shown, leakage can be further reduced, making it possible not only to reproduce low frequencies but also to improve the feeling of wearing. Here, the ellipse ratio L/W is approximately 1.3 to 2.4.

Effects of the Invention As described above, the present invention improves the adhesion between the ear and the headphones by providing elastic foam polymer around the outer periphery of the speaker and around the front surface of the diaphragm, thereby reducing sound leakage. That's it. It is possible to reproduce the low frequency range with the sub-2, and also,
The fit can be improved by fitting the ear perfectly without taking into account individual differences. Furthermore, since the adhesion has been improved, the amount of sound leaking from the headphones to the outside is reduced, which also prevents noise from being transmitted to people other than the listener.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view showing the structure of headphones according to an embodiment of the present invention, and FIG. 2 a shows the length of the concha of the ear. FIG. 2 is a front view showing the concha width, FIG. 2 is a front view showing the shape of the elastic foam polymer, and FIG. 3 is a sectional view showing the structure of a conventional headphone. 1... Elastic foam polymer, 2... Yoke, 3... Magnet, 4... Grate, 5... Vibration plate, 6... ...Voice coil, 8...Case, 10...Protector. Name of agent: Patent attorney Toshio Nakao and 1 other person7-
s AAA generation Sihipowama Figure 1? - Yoke 3 - Magnet 4 - Figure 2 / / - Ear - Concha length (θ) (b) ? -Yoke 3- Magnet Fig. 3 4-Brate 5-- Gravity resistance

Claims (2)

[Claims] (1) A case that fixes the periphery of the diaphragm of a speaker, and a protector that covers the front surface of the diaphragm, except for the periphery of the case corresponding to the circumferential direction of the diaphragm and the center of the protector. The headphone is characterized in that an elastic foam polymer is provided on the outer periphery of the head which takes a longer time to return to its original shape than it takes to deform under pressure. (2) The headphone according to claim 1, wherein the shape of the elastic foam polymer is an ellipse that matches the length and width of the concha.