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 JPS5513440 BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view showing a conventional speaker, FIG. 2 is a cross-sectional view showing an embodiment of the speaker of the present invention, and FIG. 3 is a top view of a reinforcing member used for the speaker. FIG. 4 is a crosssectional view of the same reinforcing body. 15 ····· Magnetic circuit, 20 · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · new surface M-shaped diaphragm, 23 · · · · · · · · · · · · · funnel shape Portions 25 · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · L2B · · · · · · · · · · 30 · · · · · · · · magnetic gap , 31 ..... Dust cap. DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a speaker using an imaging plate having an M-shaped cross section, and is intended to improve the reproduction frequency band. A conventional loudspeaker of this type is configured as shown in FIG. Eight or less, -kyl-g-Jvl, o, 7-7 -1 · · (5 (-one. 22. A frame e is coupled to a magnetic circuit 6 constituted by a ring-shaped magnet 3 and a ring-shaped upper plate 4, and a diaphragm 8 is formed in an Mshaped cross section together with a gasket 7 at an edge between the frames 60. Attach the engine 9, connect the voice coil 10 to the center of this diaphragm 8, hold the middle part of this voice coil 10 by the damper 11, and eccentrically lower the voice coil 1o to the magnetic cap 12 of the magnetic circuit 6 The ring-shaped reinforcing plate 13 is disposed downward of the diaphragm 8 so as to connect the center portion and the peripheral portion, and the domeshaped dust cap 14 is attached to the center of the upper surface of the diaphragm 8 There is. The diaphragm 8 having such an M-shaped cross section has a defect that a node is generated due to the bending movement of the diaphragm and compliance is achieved at this node portion, so that reproduction can not be performed at frequencies above a certain frequency. In order to eliminate this defect, a ring-shaped reinforcing plate 13 is used, but the ring-shaped reinforcing plate 13 can not obtain a sufficient effect, and it takes time to incorporate it) making positioning of the mounting position difficult. It was a poor thing of the case. The present invention eliminates the above-mentioned conventional drawbacks. Hereinafter, an embodiment of the 10-05-2019 1 present invention will be described with reference to FIGS. A magnetic circuit 15 comprises a plate 1 having a center ball 16, a ring-shaped magnet 18 and a top plate 19, and a frame 2o is coupled to the magnetic circuit 15. An edge 23 of the diaphragm 22 having an M-shaped cross section is adhesively bonded to the portion together with the gasket 21. The funnel-shaped portion 24 of the diaphragm 22 is made of synthetic resin or metal in which several triangular reinforcing ribs 26 whose width gradually widens from the lower end to the circumferential surface of the cylindrical body 26 are provided radially. The reinforcing body 27 is coupled. That is, the outer side of the reinforcing rib 26 is an inclined surface that matches the inclination of the funnel-shaped portion 24 of the diaphragm 22, and the outer side of the reinforcing rib 26 is bonded to the funnel-shaped portion 24 with an adhesive. There is. The upper portion of the voice coil 28 is bonded to the lower end of the cylindrical body 26 of the reinforcing body 27 by bonding or the like, the middle portion of the Heuss coil 28 is held by the damper 29, and the lower portion of the voice coil 29 is the above magnetic circuit The 16 magnetic gaps are known to be eccentric without knowledge of eccentricity. Furthermore, a dome-shaped dust cap 31 is attached on the funnel-shaped portion 24 of the diaphragm 22. Since the speaker of the present invention is configured as described above, the funnel of the central portion of the diaphragm M-shaped diaphragm Since it is reinforced by the reinforcements and reinforcements, it is possible to prevent the bending movement of the top of this promotion 1 plate, and the vibration of the voice coil is also transmitted through this reinforcement, so that the loss is small and the whole diaphragm is Over the same time, the voice coil can be vibrated faithfully, the reproduction frequency band can be extended by almost an octave, the reinforcement body can be easily incorporated, and the productivity can be improved. It is. 10-05-2019 2
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