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 JPS5752297 Description 1, title of the invention Speaker device 3. Detailed Description of the Invention The present invention relates to a speaker device applied to a public announcement system or the like. A conventional loudspeaker device, for example a band loudspeaker, consists of a magnetic core, permanent magnets mounted on this core and a plurality of pole caps. A vibrating band is mechanically attached between the lids and further electrically connected to the signal source. However, conventional band loudspeakers have the disadvantage that the temperature conditions at which the vibrating bands operate are disappointing, which limits the possibility of increasing the power of the loudspeaker. The present invention has been made in view of the above-mentioned circumstances, and an object thereof is to provide a speaker device which gives a preferred temperature condition for the vibration band and increases the power. According to the speaker device of the present invention, the magnetic core, the permanent magnet deposited on the core and the magnetic pole lid are provided. A vibratory band is mechanically attached between the lids, and the vibratory band is pneumatically connected to the signal source. The whole area grids are respectively provided on both sides of the pole cover. These grids EndPage: 1 are made of a nonmagnetic material such as aluminum or brass. Therefore, according to the present invention, there is a main advantage that the temperature condition when operating the vibration band 帯 5 is improved and the power of the speaker device can be increased. An embodiment of the present invention will be described below with reference to the drawings. Reference numeral 1 is a magnetic core of the speaker, and a permanent magnet 2 is attached on the magnetic core 1. A plurality of magnetic pole lids 3 are provided on the permanent magnet 2. A vibration band 4 is mechanically attached between the mounts 3 and the vibration band 4 is electrically connected 13-05-2019 1 to a signal source (not shown). For example, two grids 5 are provided on both sides of the pole cover 3 respectively. These grids 5 are made of nonmagnetic material, such as aluminum, for example, brass. When a single power is supplied, a current flowing through the vibration band 4 generates a magnetic field. This magnetic field interacts with the magnetic field formed by the permanent magnet 2 so that the vibration tJ 4 vibrates to generate a hoarse frequency signal (power). Since the efficiency of the speaker arrangement is low, substantially all of the supplied power is converted to heat in the vibration band 4. Therefore, the vibration band 4 is heated and immediately becomes the weir temperature. The nonmagnetic metal grid 5 provided on both sides of the magnetic pole attachment 30 dissipates the heat of the most part of the vibration band 4 so that the heat consists of the magnetic core 1, the permanent magnet 2 and the pole cover 3 It is transmitted to the magnetic system. As a result, the temperature of the vibration band 4 can be reduced, and the power supplied to the speaker device can be increased. 4 is a cross-sectional view of an embodiment of the present invention, a simple illustration of the drawing. 1 · · Magnetic core, 2 · · · Permanent magnet, 3 · · · · · · · · · · · · · · · · · · · · · · · · · vibration band, 5 · · · non-magnetic metal grid. Applicants Attorney Attorney Takeshi Suzue 1st page continued 0 Inventor Anastasia Nicolaeva Tercieva Bulgaria Sophia Bowl 9-Tee Combless Su-BK 23-23 2 13-05-2019 2
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