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BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view showing a case where a yoke is
attached to a coil bobbin according to the present invention. FIG. 2 is a front view showing only a
coil bobbin of FIG. 1, and FIG. 3 is a side view of FIG. 1 и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и
и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и tube portion, 4. иииииgroove.
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a coil bobbin for
use in the magnetic path of a moving magnet type stereo pickup cartridge, so that the mounting
of the yoke is extremely easy. In the stereo bib amp cart which reproduces a record signal in the
l1t1I number band above the audio frequency, it is also a cobblestone to reduce the effective
mass of the mechanical vibration system including the stylus, but the gas (1) The improvement of
the damping of the gain of the magnetic circuit in the region of the '? ? ? area is first of all
very important. In order to improve the attenuation of the high frequency gain of the magnetic
circuit, an integrated M1 resistance grinding yoke is used which does not have a Kll groove other
than a gear groove. The yoke is made of a good magnetic material with zero frequency
characteristics. {Circle over (7)} The 7i method of these {circle over (1)} and {circle over (2)} is
used in combination. ?????? In the past, these yokes were coated with an insulating
material except for the gap to form a coil by winding. However, since the yoke is punched and
formed, Paris increases, especially In the case of a laminated structure, it is difficult to remove
the paris because the thickness of the plate is thin, so even if an insulating material is applied to
these, there is a disadvantage that insulation defects occur frequently. In order to eliminate this
defect, the yoke may be formed by the etching technique, but in this case the occurrence of Paris
can be reduced, but this method is expensive and it is not suitable for mass drying (2 The subject
is hS. Furthermore, it is possible to wind it around a coil bobbin and insert it into the yoke and
attach it for several seconds, but the moving magnet type must have a large number of turns and
the gap distance is narrow. There is a problem that is very difficult. The present invention is
intended to solve the problem of straw and the problem (also to provide a coil bobbin of a big
end tube cart II edge). An embodiment of the present invention will be described with reference
to the drawings. The coil bobbin IK extends from the portion of one flange 20 to the portion of
the cylindrical portion 3 at [email protected], and the longitudinal #I 4 extends over the entire length. It is
provided (see Figure 3). Then, the coil bobbin IK has the U-shaped yoke 5 inserted and attached
from the groove 40 and attached with the required number of sheets to make the state as shown
in FIG. The winding will be done afterwards. When the winding is performed, complete insulation
is ensured, and the coil bobbin 1 sums up so that the winding is lined up in an orderly manner
(3). This invention is a moving coil ? one 11 K of this coil bobbin in a cobin used for the
magnetic circuit of a stereo pickup cartridge.
Since the groove is provided for all four in the direction of the sliver, the structure is simple, the
mounting of the yoke is covered and the coil having the r'h N air characteristic characteristics
easily performed. It is possible to obtain a coil bobbin that can be used.
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