Patent Translate Powered by EPO and Google Notice This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate, complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or financial decisions, should not be based on machine-translation output. DESCRIPTION JPS62115997 [0001] FIELD OF THE INVENTION The present invention relates to a speaker having a diaphragm (or a diaphragm) in which a plurality of and multi-layered (multi-layered) voice coils formed by etching thin films and foils on a resin film are received. Is the area of the vibrating part that it has. It relates to the configuration and structure of thickness and ease of vibration. [Background of the invention] A conventional device is called a so-called "gum-thin type speaker" and pastes voice coils uniformly distributed on a thin film diaphragm as described in Japanese Patent Publication No. 35-10420. The diaphragm is uniformly driven by being placed in a magnetic circuit corresponding to the shape of the voice coil. However, while a constant diaphragm area is required according to the lower limit of the reproduction frequency, the directivity is degraded in the high range because of the uniform driving on the entire surface. [Object of the invention] An object of the present invention is to provide a loudspeaker capable of reproducing the entire band with flat sound pressure frequency characteristics and having high directivity up to high frequency with a single diaphragm (diaphragm). . [Summary of the invention] In order to improve the directivity of middle and high sound, it is necessary to reduce the area of the vibration unit for middle and high sound, and in order to share the low frequency diaphragm and use it as one for middle and high sound The small area of a part of the diaphragm is made thin and easy to vibrate with a small signal input, and the problem is solved by using this part as a vibrator for high and high. An embodiment of the present invention will be described below with reference to FIG. A part of the diaphragm 1 and a portion surrounded by a broken line is used as a diaphragm 8 for middle and high frequencies, and is formed of a voice coil 2 of multiple layers and a multilayer voice coil 7 for middle and high frequencies. When the bass is vibrated, the entire diaphragm 1 (including the diaphragm for middle and high frequency range) is driven, and when the middle and high frequency is vibrated, only the diaphragm for middle and high frequency 8 is driven. The middle-high frequency range diaphragm 8 is a part of the diaphragm 1, but its 13-05-2019 1 thickness is small compared with this, and even a small electric input signal is driven with high efficiency, and the area is also small. Further, in order to drive the middle to high frequency diaphragm 8 with high efficiency and to improve the sound quality, an edge may be formed in the circumferential concave portion (broken line portion). FIG. 2 is a cross-sectional view of the vibrating membrane of FIG. 1. 0 [Effect of the Invention] According to the present invention, an appropriate vibrating portion can be driven by an input signal frequency with a single vibrating plate (vibrating membrane) Therefore, the directivity is improved over the entire band. [0002] Brief description of the drawings [0003] FIG. 1 is a front view of a diaphragm (diaphragm film) according to an embodiment of the present invention and a network connected thereto, and FIG. 2 is a cross-sectional view of the diaphragm (vibration film) of the present invention. Reference Signs List 1 diaphragm 2 multi-layer voice coil 7 multi-layer voice coil for middle and high frequency region 8 diaphragm for middle and high frequency region 9 network for low frequency region 10 network for high and low frequency region 13-05-2019 2
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