JPS51122405

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DESCRIPTION JPS51122405
2 Indication of original patent application Showa 4a Patent application No. 82944 Jingumae 2chome, Shibuya-ku, Tokyo 6-8 (1) 1 description. ■ Japanese Patent Office 0 JP-A-51-1224050
Published Japanese Patent Application No. 51. (1976) 10.20 Internal Serial No. / 723
Description of the Invention
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing the structure of a
moving magnet type pick-up cartridge according to the present invention: 1; magnet, 2; damper;
5; cantilever; 4; record needle; 5; It is a coil. FIG. 2 is a perspective view showing the structure of
a moving coil type pickup car according to the present invention IJ-edge; 7; magnet, 8; damper, 9;
canteen bar 10 '' record needle, 11; ball, 12; No 19 coil.
ピックアップ・カートリッジ
Detailed Description of the Invention The present invention uses a magnet consisting of a single
or complex intermetallic compound of rare earth elements Bm, Pr and Co, or ijPe, Mn to achieve
faithful reproduction and cost reduction. It is about Conventionally, it is preferable that the
pickup cartridge be able to faithfully reproduce the sound of the bell ring on the record, but due
to various limitations in practice, most of them are used as they are not enough 0, for example,
the weight of the cartridge vibrator However, it is well known that the lighter the point is to trace
the groove of the recording board accurately and the subtle sound to be reproduced faithfully.
Conventionally, in order to obtain the necessary magnetic flux, it is necessary to increase the
shape of the magnet used, and to increase the number of turns of the coil to obtain sufficient
output power, or to increase the cross-sectional area of the coil winding coil Necessary pardons,
etc., weight reduction is not necessarily measured. Although a magnet material such as uBa
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ferrite or Alnico is used as the magnet, the energy product (, BHm · X) held by the magnet is not
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high performance -θ-tris-di is obtained J! (1) above, (1), (2) ダ y) Y 希 希 10 希) End Page: 28 m,
Pr and CO
It is high if it is made of an intermetallic compound singly or in combination. It can
provide energy, low cost, light weight cartridges, and offers superior characteristics as pickup
cartridges.
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