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 JPS57148992 BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing the main part of a conventional ribbon type speaker, FIGS. 2 to 4 show an embodiment of the present invention, and FIG. 2 is a main part of the ribbon type speaker 3 is a perspective view of a vibration system unit constituting a part of FIG. 2, and FIG. 4 is a perspective view showing a vibration system unit applied to another speaker. 12: Vibration system unit, 12a, 22a1 ° 22a2: Ribbon-shaped diaphragm, 12b, 22b: Frame, '12C2, 22C1, 22C2: Power supply. DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a ribbon type speaker having a ribbon diaphragm made of a conductive metal foil alone. In such a speaker, the diaphragm is disposed in the magnetic gap of the magnetic circuit, and the direct current resistance is oscillated by flowing a signal current to, for example, the diaphragm itself having a low resistance of 0.024 ohms and a very low 7. The plate is vibrated to emit sound. For this reason, there is a problem that the impedance due to the self-inductance of the diaphragm at a high frequency is increased, thereby decreasing the output sound pressure level. Therefore, conventionally, as shown in FIG. 1, the feed body 2 to the diaphragm 1 is disposed parallel to the diaphragm h in parallel to the diaphragm 1 and the L1 diaphragm 1 and the feed body 2 are mutually reversed as shown by arrows. It was configured to flow the current of the direction to solve this opening. In addition, 3 and 4 constitute a magnetic circuit together with another set of permanent magnets and swellings (not shown). However, in this conventional speaker, since the diaphragm 1 and the feeder 2 need not be separate from each other in the AIC magnetic circuit 13), the feeder 2 is formed into a predetermined shape and then fixed to the magnetic circuit. It is necessary to provide a means for electrically connecting the diaphragm 1 and the feeder 2 with respect to the contact resistance at the connection point between the diaphragm 1 and the feeder 2, the DC resistance of the diaphragm 1 and the presence or absence of disconnection. And can not be performed unless it is incorporated in the magnetic circuit, which has disadvantages such as poor workability. The present invention was made to the point mentioned 11-05-2019 1 above, and the place where the purpose is does not require special means for fixing the feeder, and moreover the electrical inspection for the diaphragm and the feeder It is an object of the present invention to provide a ribbon type speaker which eliminates the above-mentioned conventional drawbacks by making it possible to perform the above-mentioned prior to the incorporation into the magnetosphere path. An embodiment of the present invention will be described below with reference to FIGS. 2 to 4. 1.21.、)! 2 shows the main part of the ribbon type speaker according to the present invention, and in FIG. 1, 10 is a permanent magnet, 11 is a pair of turns forming a magnetic circuit with the permanent magnet 10, and pJG is formed between the yokes 11 during the magnetism. It is done. A vibration system unit 12 is installed in the mounting groove 11 'of the vibration 11 and incorporated in a magnetic circuit. The vibration system unit 12 is a ribbon-like diaphragm 121 made of a single conductive metal foil such as a full dinium foil or a beryllium foil having a thickness of about 10 μm, and a frame 12kl supporting the diaphragm 12 turtle. A land-like feeder 120. h provided on the frame 12b. And a window frame shaped feed 120. And are assembled as shown in FIG. The frame 12b is, for example, a nonmagnetic metal plate 4 such as a full 1 n * plate whose surface is electrically insulated. 133t。 Da, 1... Are formed to have a rectangular window hole 12b 'substantially in the center. In the land-like feeder 12C1 and the window / frame-like feeder 12C1, the feeder 1201 is adjacent to one short side of the window hole 12b 'and the feeder 12C7 is a feeder 120. And the window holes 12b 'are formed on one surface of the frame 12b by the same etching method as in the case of producing a printed circuit board. The replacement vibration diaphragm 1.21 is disposed so as to cross the window hole 12b 'in the longitudinal direction, and one end of the replacement vibration diaphragm 1.21 is connected to the power supply 120. And the other end of the power supply 120.1 facing the insulator 1201 with the window hole 12b '. Each part is electrically connected by soldering or the like. Further, the diaphragm 121L is made narrower than the width of the window hole 12b ', and a gap 1211 formed between the window hole 12b' and the diaphragm 12m) is made of a visco-elastic material as shown in FIG. Embedded by the damping material 12. The damping material 12 · is for applying an appropriate damping force to the diaphragm 12 & to improve 1 acoustic characteristic. In addition, the code ¦ symbol 41i112f is each connected to the electric power feeding body 12m) and the electric power feeding body 12b20 part adjacent to this. As described above, by forming the vibration system enit 12, the feed body 121) is provided in parallel with the longitudinal direction of the diaphragm 12a, and the signal! When the signal current is supplied from 112f, as shown by an arrow in FIG. The reverse current flows in the part of. For this reason, 135 smears are generated by the diaphragm 121 and the portion of the power supply 12 o parallel to the h. Of the magnetic field being mutually canceled, selfinduction which the diaphragm 12 & and the feed body 12i have, and decrease in the inductance to maintain good high frequency characteristics L? l−i。 In the embodiment described above, the ribbon-shaped diaphragm was one sheet, but the present invention is a ribbon-shaped speaker having two narrator plates each arranged in two magnetic gaps whose magnetic field 11-05-2019 2 directions are opposite to each other. The vibration system unit 22 in this case is shown in FIG. 4+. In the unit shown in FIG. 4, two window holes 22b and 22b are formed in the frame 22b, and feeders 2201 and 220.2 which attract along the window holes 22b and 22b, respectively. And windows 22b and 22b. Power supply 2203 adjacent to both short sides of the window, and one end of the diaphragm 22a and 221L disposed so as to cross the window holes 22b and 22b respectively as '1136N' And 22C8 at one end and the other end to the feed 22C1, respectively, and the feed 220 and 220. A signal @ 221 is connected to the other end of the. For this reason, when the signal current is supplied from the signal # 22f, as shown by the arrows, the diaphragm 22 &, and the feeder 220. And diaphragm 22a! In addition, currents reverse to each other flow through the feeder 220 ° to obtain a cancellation effect of the self-inductance. In the present invention, as described above, a system for supporting a ribbon-shaped diaphragm made of a single conductive metal foil alone and provided with a feeder in parallel with one diaphragm is assembled to a vibration system x = knit magnetic circuit It is. For this reason, the current directions .. 137 and J flowing in the diaphragm and the feed body are opposite to each other, the self inductance of them is reduced, and the characteristics in the high frequency range are improved. The unitization of the vibration system simplifies the assembly and handling of the magnetic circuit and makes it easy to handle it, and the electric check of the diaphragm etc. can be performed by the unit alone before the integration into the magnetic circuit. As a result, the workability is improved, which leads to an increase in productivity and a cost reduction. In addition, since the feeder can be formed by printing or the like, it is possible to further reduce the cost, and a number of practically superior effects can be obtained. 11-05-2019 3
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