KR910005370Y1 - Diaphragm - Google Patents

Abstract

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Description

Diaphragm that reversed output sound

1 is a view showing an embodiment when the diaphragm according to the present invention is used for the speakers, (a) is an exploded perspective view illustrating a case applied to the speaker for headphones, (b) is a plan view thereof, (c) is an enlarged sectional view taken along line II in (b), and (d) is a schematic sectional view illustrating a case where the cone is applied to a (Cone) type speaker.

2 is a partially omitted cross-sectional view illustrating that the diaphragm according to the present invention is used in Mic.

3 is a curve diagram showing the frequency characteristics of the speaker using the diaphragm according to the present invention.

* Explanation of symbols for main parts of the drawings

2, 2 ', 2 ": diaphragm 10, 20: speaker

12, 12 ', 12 ": Main diaphragm 26, 26', 26": Edge Portion

30, 30 ', 30 ": sub diaphragm d, d', d": microelectrode

p, p ', p ": center point

A diaphragm in which the output sound of the present invention is optically reversed, and more specifically, a sub diaphragm formed of a thin film on an upper surface of a main diaphragm attached to an existing speaker and a Mic. Spot is attached so that only a central part thereof is adhered to the main diaphragm so that the diaphragm can reproduce a clear tone and display a wide range of sounds from low to high when used in speakers and Mic. It is.

Conventionally, since the speaker and the Mic are composed of only one main diaphragm, the voice conversion efficiency from low to high is difficult to reproduce perfectly. In other words, in the case of the speaker, the diaphragm is fixed to the edge of the speaker by the gasket, and the fixing of the edge part reduces the vibration phenomenon of the entire diaphragm. There is a drawback to narrowing. In addition, although these parts are molded by replacing the improved diaphragm with a material such as carbon fiber having a lighter and higher modulus of elasticity, the diaphragm edge portion is not fixed so that it is not possible to obtain a great voice conversion efficiency.

These problems are the same for Mic, which has only one diaphragm.

The present invention was developed after long research to solve the above-mentioned shortcomings, and its object is to provide the following features.

An object of the present invention is to provide a diaphragm formed in the center portion of the upper surface of the main diaphragm, the secondary diaphragm formed of a thin film, the spot portion of the center diaphragm with a microgap from the upper surface of the main diaphragm to open the edge portion.

Another object of the present invention is to provide a diaphragm having a plurality of secondary diaphragms chipped on an upper surface of the main diaphragm.

Another object of the present invention is to provide a sub diaphragm thinner than the main diaphragm.

In addition, an object of the present invention is to provide an application of the diaphragm to the speaker and Mic.

The foregoing objects and other advantages will be more apparent from the accompanying drawings and the embodiments described below.

In Fig. 1 and Fig. 2, the same parts are denoted by the same reference numerals.

1a to d are diagrams schematically illustrating an example of a speaker 10 for a headphone and a cone-shaped speaker 20 in which the diaphragm 2, 2 ′ according to the present invention is used. In the drawings, (12) and (12 ') are main diaphragms, (14) are frames, (16) are yokes, (18) and (18') are magnets, and (22) and (22 ') Are voice coils and 24 are bobbins respectively.

The diaphragm 2 (2 ') of the present invention has a sub diaphragm 30 (30') formed of a thin film on the central upper surface which becomes the vibration center of the main diaphragm (2) (2 '). The micro diaphragm d, d 'is attached to the main diaphragm 12, 12' from the upper surface, and the sub diaphragm 30, 30 'is spot only at the center portion p, p'. By bonding, the edge portions 26 and 26 'of the secondary diaphragms 30 and 30' are kept open.

Further, a plurality of secondary diaphragms 30 and 30 'adhered to the upper surfaces of the main diaphragms 12 and 12' may be provided as shown in FIG. 1D. In addition, the sub diaphragm 30, 30 'is formed in thin shape thinner than the thickness of the main diaphragm 12, 12'. For example, assuming that the thickness of the main diaphragm 12, 12 'is 16 microns, the thickness of the sub diaphragm 30, 30' attached to the upper surface is preferably about 4 microns.

When the diaphragm 2 (2 ') of such a structure is used for the speakers 10 and 20, the voice driving force from the voice coils 22 and 22' is the main diaphragm 12 (12 '). Vibration to generate an output sound, and also increase the output pressure by increasing the vibration by the vibration sound at this time to have a wide sound band. That is, the voice driving force from the voice coils 22 and 22 'vibrates the main diaphragms 12 and 12', and is also spot-bonded to the vibration center region of the main diaphragms 12 and 12 '. Since even the sub-vibrations 30 and 30 'are vibrated, the vibration effect is doubled, and thus, vibration frequencies of low and high frequencies having a wide range of sound bands are obtained. Further, the sub diaphragms 30 and 30 'are formed to be thinner than the main diaphragms 12 and 12', and the main diaphragms 12 and 26 'are open so that the sub diaphragms 30 and 30' are open. Even after the vibration of the 12 'is finished, the negative diaphragms 30 and 30' continue to vibrate to some extent, so that the negative area limit is lower than that of the speaker equipped with the conventional main diaphragm 12 and 12 '. Has the effect of being wide.

2 shows an embodiment in which the diaphragm 2 '' according to the present invention is used for the Mic 40 having the same diaphragm 12 "as the speaker 10 'and 20'. . In the same figure, reference numeral 42 denotes a housing, 44 coils, and 46 magnets. Also in the case of the Mic 40, as in the above embodiment, only the main diaphragm 12 "is provided, as in the above embodiment, and the diaphragm 2" having the sub diaphragm 30 "is installed, and the low to high sound is excellent. Can be implemented perfectly.

3 shows the frequency characteristic curve of the speaker 10 using the diaphragm 2 of the present invention as an example.

In the same figure, the curve a shows the frequency characteristics of the speaker having the conventional main diaphragm 12 only, and the curve b shows the speaker 10 when another diaphragm 2 is used in the present invention. In this case, the speaker 10 in the case of using the diaphragm 2 of the present invention is generally a peak-dip compared to the speaker having only the main diaphragm 12 without the conventional diaphragm 30. It can be seen that the sound with little peak-dap is clear and the output sound pressure is increased.

For example, the bass sound is abundant at 5dB at 100Hz, 12dB at 10KHz, and the peak-dip is less pronounced at 3KHz. This is because vibration is made high by the use of the diaphragm 2 which has the sub diaphragm 30, and the sound band was improved. This phenomenon gives the same result even when applied to the speaker 10 and Mic.

In the present invention, by forming another diaphragm on the main diaphragm as described above, the diaphragm used for the speaker and the Mic is constituted, which can double the vibration effect of the diaphragm and increase the negative area. In addition to achieving a wide range of sound for the output sound, there is an excellent effect of obtaining a more detailed and clear sound quality.

Claims (4)

Consisting of only one main diaphragm 12, 12 ', 12 ", formed in a thin film on the central upper surface of said main diaphragm 12, 12', 12". One sub diaphragm 30, 30 ', 30 " is placed on the main diaphragm 12, 12', 12 " with a small gap d, d ', d " Spot sound is formed by spot bonding only the center portions p, p ', and p " to open the edge portions 26, 26', and 26 ". (Iii) backwashed diaphragms. 2. The diaphragm according to claim 1, wherein a plurality of secondary diaphragms (30 ') are bonded to an upper surface of the main diaphragm (12'). The diaphragm of claim 1, wherein the sub diaphragm (30) (30 ') (30 ") is formed thinner than the thickness of the main diaphragm (12) (12') (12"). The diaphragm according to claim 1 to 3, wherein the diaphragm is used for a speaker and a Mic.