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 JPS62265898 [0001] BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a speaker used for various audio devices and video devices. Prior Art A conventional loudspeaker of this type is configured as shown in FIG. That is, the leakage flux of the main magnet 3 is applied to the back surface of the lower plate 2 of the magnetic circuit constructed by incorporating the ring-shaped main magnet soto 3 and the ring-shaped upper plate 4 on the lower plate 2 having the center ball 1. To cancel the magnetizing direction, the cancel magnet 6 is bonded in the opposite direction, and the frame end is connected to the top plate 4 of the field section 6 where the anti-magnetic measures are taken. The voice coil 11 is bonded to the central portion of the diaphragm 9 without being eccentric to the magnetic gap 10 formed in the field section 6 without being eccentrically attached, and the bobbin middle portion of the voice coil 11 is And the dust cap 13 is incorporated on the upper surface of the central portion of the diaphragm 9. Here, in order to reduce the leakage flux to the outside of the main magnet 3, the characteristic of the conventional speaker of this type is to magnetize the back surface of the lower plate 2 of the field section 6 in the opposite direction to the main magnenode 3 It adheres to the main magnetic magnet 3 in the direction of repulsion to the main magnetic metal 3 and normally shorts the magnetic magnetic head V 6 and the upper plate 4 to form a magnetic circuit, and also functions to shield the leakage flux. The result is that the shield cover which has been achieved is omitted for cost reduction. Problems to be solved by the invention In such a conventional configuration, since the magnetizing direction of the main magnet 3 and the cancel magnet 7) 5 is adhered in the opposite direction, they are separately magnetized and adhered. However, after the magnetization of the cancel magnetic node 6 is completely magnetized, the magnetization direction can not be determined at all in appearance, and when bonding to the lower plate 2 of the speaker, the bonding direction is incorrect with the adhesion direction fixed. The adhesive is not cured immediately after bonding, so the cancel magnet 6 is displaced from 13-05-2019 1 the lower plate 2 due to the repulsion of the magnetic force of the main magnet 3 and the cancel magnet 6, and it is eccentric. Bonding as it is (there are two major quality problems that lead to a decrease in bonding reliability due to a reduction in the bonding area between the two). Means for Solving the Problems To solve this problem, the present invention does not adhere the lower plate and the canceled Magnes Soto as it is, but sandwiches the magnetic metal body between them and lowers the magnetic metal body. It is considered to be connected to Since the magnetic metal body is already adhered to the cancel magnet before the magnetization is performed when the cancel magnet is joined to the lower plate by this configuration, the adhesion of the magnetic metal body is performed. It is possible to visually judge the direction in which it is being used, and therefore it is possible to couple the cancel magnet to the back of the lower plate without making a mistake in its magnetization direction, and between adhesion and curing of the adhesive. Since screwing is performed as a configuration in which the magnetic metal body in which the cancel magnet is adhered to the screw hole at the bottom portion of the center guide hole of the lower plate is tightened, it is possible to prevent the adhesion deviation caused by the repulsive magnetic force of both. Embodiment 1 FIG. 1 shows an embodiment of the present invention. A field portion 18 incorporating a ring-shaped main magnet 16 and a ringshaped upper plate 17 on a lower plate 15 having a center pole 14. The frame 19 is coupled onto the field portion 18, the peripheral edge of the diaphragm 21 is coupled to the circumferential edge of the frame 19 together with the gasket 20, and the voice coil 22 is coupled to the central portion of the diaphragm 21. The lower part of the voice coil 22 is fitted into the magnetic gap 24 of the field part 18 without eccentricity by holding the middle part of the voice coil 22 by the damper 23, and the dust cap is attached to the upper surface of the central part of the diaphragm 21. It sticks 26 and constitutes a general speaker. Then, a screw hole 26 is provided at the center of the lower plate 16 of the field section 18, and a cap-like magnetic metal such as iron is adhered to the main magnet 16 and a cancel magnet 27 whose magnetization direction is opposite to that 28 is configured to be connected by a mounting screw 29. That is, the loudspeaker according to the present invention comprises a magnetic metal body 28 serving as a mark in the direction of magnetization and a function to prevent adhesion deviation due to magnetic repulsion on the back surface of the lower plate 16 of a conventional external magnet type speaker. The cancel magnet 27 and the lower plate 15 are coupled by tightening the mounting screw 29 so as to clamp the magnetic metal body 28 in the screw hole 26 cut in the center guide hole bottom portion at the back center. Here, the roles of the magnetic metal body 28 and the mounting screw 29 will be described. First, in the process, assembly of the external magnet type speaker and adhesion of the cancel magnet 27 and the magnetic metal body 28 are separately performed in parallel. Magnetize all. ここでキャンセルマグネ? Since the direction in which the magnetic metal body 28 is adhered is used as a mark when magnetizing in 27), the magnetizing direction can be easily determined from the appearance. 13-05-2019 2 When both magnetizing processes are completed, an assembly of the cancel magnet 27 and the magnetic metal body 28 is provided in the center of the magnetic metal body 28 in the screw hole 26 cut in the bottom of the center guide hole of the lower plate 16 of the speaker. The mounting screw 29 has a configuration in which the magnetic metal body 28 is tightened in the through hole, and both of the repelling force caused by the opposite magnetic force direction of the main magnet 16 and the cancel magnet 270 of the speaker This is a magnetic-shielded speaker configured to be bonded while preventing misalignment. Further, as shown in FIG. 2, a hole is provided at the center of the lower surface of the lower plate 16 with a connecting protrusion 30 and at the center of the magnetic metal body 28 in which the cancel magnet 27 is adhered to the connecting protrusion 30. , And may be joined by forming a head 31 by performing a high-spin process to crush the tip of the connecting projection 30. Further, as shown in FIG. 3, a conical guide hole 32 is provided at the center of the lower surface of the lower plate 16, and the center of the magnetic metal body 28 such as a flat plate iron is adhered in advance. It is also possible to provide a conical guide projection 33, which is positioned to fit into the guide hole 32 and bonded by bonding or welding. As described above, according to the present invention, after attaching a magnetic metal body to a cancel magnet and magnetizing it as a mark in the magnetization direction, screw holes are cut in the bottom of the center guide hole of the lower plate. Since it is configured to be screwed and coupled, the magnetic metal body is adhered to one surface of the cancel magnet from the time it is magnetized to the cancel magnet until it is screwed to the back surface of the lower plate. Therefore, the magnetizing direction can be easily determined on the appearance so that the adhesive direction can be adhered without mistake, and if it is the conventional method, the main magne I will be cured until the adhesive is cured. (3) The two members, which were living together due to the repulsion of the magnetic force of the cancellation magnet and the cancellation magnet, are completely eliminated by screwing. The direction of adhesion of the gnet to the lower plate is not mistaken, the reliability in the direction of magnetization is significantly improved, and the adhesive displacement of the speaker and the cancel magnet is also eliminated, and the appearance quality is improved and the adhesive displacement is accompanied. Since the reduction of the lower plate and the cancel magne / tono adhesion area is also eliminated, the quality reliability in the adhesion can be made very stable, and the industrial value is very good for dogs. FIG. 2 is a cross-sectional view of a conventional speaker. 14 · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · top plate, 18 · · · · · · field Portions 19 · · · · · · · · · · · · · · · · · · · · · · · · voice coil, 24 · · · magnetic gear · · · · · · · · · · Screw holes, 27: Cancel magnet, 28: Magnetic metal, 29: Mounting screw. Name of agent Attorney Nakao Toshio Other 1 person Figure 3 ど Figure 4 13-05-2019 3
© Copyright 2021 DropDoc