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JPS514642

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complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or
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DESCRIPTION JPS514642
FirstPage does not include a pipe-like vibrator 12 made of a magnetic material such as soft iron
supported by a damper rubber 15, for example. The groove 32 of the needle case 23 is for
determining the position of the damper rubber 15. The damper rubber 15 is accurately fixed by
the damper adapter 24. The groove 33 of the needle case 23 is a relief groove of the pole pieces
1 and 3. The groove 34 of the needle case 23 is for fixing the metal plate 17, and the metal plate
17 is for fixing the movement of the vibrator 12 and for fixing the tension wire 16 which reveals
the fulcrum of vibration. . The needle case 23 is moved in the direction indicated by arrow F in
FIG. 2 until it just fits into the projection 31 of the cartridge case 18. Grooves 35 (FIGS. 6 and 8)
are also intended to securely screw the cartridge onto the pick-up arm. The operation of the
present invention will be described with reference to FIG. The motion transmitted to the needle
14 by the record is transmitted through the vibrator 12 hekan teleper 13 consisting of a
permanent magnet, and one end of the pair of pole pieces 1 and 3 is bent so that the ends of the
pair of pole pieces 1 and 3 are perpendicular to each other. The transducer 12 disposed in the
middle thus modulates-rectifies in the record groove wall to produce a flux change in the pole
piece. At this time, it is necessary for the channel separation to be good (in order to pass the
output voltages in the lateral direction and the particle direction are equal to each other). In FIG.
1, 36 is a partical compensator, which is made of a magnetic material such as permalloy, and it is
easy to keep the channel separation more than 25 dB by placing it parallel to the recording
surface. ρ g can be done. The largest variation in the conventional stereo cartridge was channel
separation, but this partial compensation plate 36 eliminates this drawback. When the operation
of the particle compensation plate 36 is described, the motion transmitted to the record needle
14 is obtained through the vibrator 12 via the cantilever 13. At this time, considering the lateral
direction and the particle direction, in the lateral direction, when the vibrator 12 is at the middle
of the pole pieces 1 and 3 at the beginning, the same amount of magnetic flux is applied to the
pole pieces 1 and 3 Although it is flowing, the magnetic flux of the pole piece 1 increases and the
magnetic flux of the pole piece 3 decreases when the balance is shifted, for example, when the
vibrator 12 approaches the ball birlllllll piece 1. If this increases or decreases by the same
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amount, the L1R channel can obtain the same output.
In this case, since the left and right are completely symmetrical, the balance is well maintained.
Next, considering the particle direction, as shown in FIG. 9, assuming that the pole pieces are
arranged symmetrically with respect to the magnetic body 12 with Ll 'and 3,3', The magnetic flux
emanating from the magnetic body 12 is evenly distributed to each pole piece 1, 1 ', 3, 3'.
Therefore, if the magnetic body 12 is moved by d in the y direction with respect to the vertical
direction as shown in FIG. 10, the change of the magnetic flux is as shown in FIG. And increase in
pole piece 1 and 3 by this increased amount. Also, conversely, when the magnetic body 12 moves
in the y 'direction, the pole piece 1' decreases by an amount increased by the pole pieces 1 and 3.
Thus, the change of the magnetic flux is in proportion to the movement of the magnetic body 12
and eventually becomes equal to the movement of the cantilever 13 supporting the magnetic
body 12, that is, the waveform of the sound carved in the sound groove of the record. However,
as shown in FIG. 11, when one of the pole pieces is not present, most of the magnetic flux which
has been flowing to the pole and pieces 1 'and 3' is a leakage flux and a very unstable magnetic
flux. Therefore, as shown in FIG. 42, even when the magnetic body 12 moves in the y direction
by dk, the pole pieces 1 and 3 must have a decrease in the magnetic flux which corresponds to
the movement of the magnetic body 12 in nature. What must be done is that there is no such
reduction due to leakage flux. As described above, when a large amount of leakage flux is left, the
amount of change in magnetic flux that should naturally occur with respect to the movement of
the magnetic body 12 decreases, and the amount of change in magnetic flux at the time of
decrease and increase Differently, it causes distortion. Furthermore, since this unstable leakage
flux is susceptible to the influence of the outside world, it is easily disturbed by the induction
magnetism from the outside, and as a result, the influence of the outside world on the pole pieces
1 and 3 becomes significant. . Therefore, as shown in FIG. 13, the present invention absorbs the
leakage magnetic flux so that it functions as the pole piece 1 'of FIG. 9 and FIG. 10 by using the
particle compensation plate 36. The change of the magnetic flux to the pole pieces 1 and 3 with
respect to the movement of the magnetic body 12 is also normal as described in FIGS. 9 and 10
[111111] EndPage: 2
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