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    • 5. 发明专利
    • OPTICAL INFORMATION RECORDING DISK
    • JPS63228478A
    • 1988-09-22
    • JP6329787
    • 1987-03-17
    • PIONEER ELECTRONIC CORP
    • NAMIKI TORUMATSUI FUMIOSHIMODA KOSHI
    • G11B23/00G11B7/24
    • PURPOSE:To unify both sucking parts without separating in a rotating direction and a shaft direction without fail by constituting a sucking part of a resin-made hub member and a magnetic body hub yoke, pushing the claw piece of a locking piece provided at a hub yoke into the notch of the resin-made hub member and unifying both. CONSTITUTION:At the center part of a circular yoke part 21, an angle shaft 22 fitted into a shaft hole 12 of a resin-made hub member 10 is protruded and at the circumference, a locking piece 23 is formed at the interval of 120 deg.. The locking piece 23 is sandwiched to two shallow slits 23A provided along a diameter direction and the tip part of the locking piece 23 is bent in the same direction as the protruding direction of the angle shaft 22 along the plane orthogonal to the diameter direction and comes to be a claw piece 23B. For the resin-made hub member 10 and a hub yoke 20, the circumferential surface of a notch 14 is firmly grasped by the claw piece 23B of the locking claw 23, further, the claw piece 23B is fitted into a flat part 14A of a notch 14 and unifying is executed without separating them in the circumferential direction and the shaft direction of both. Thus, the moving and separating of both can be prevented.
    • 6. 发明专利
    • OPTICAL INFORMATION RECORDING AND REPRODUCING DEVICE
    • JPS6313138A
    • 1988-01-20
    • JP15766986
    • 1986-07-03
    • PIONEER ELECTRONIC CORP
    • SHIMODA KOSHI
    • G11B21/08G11B7/085G11B7/09G11B21/02
    • PURPOSE:To miniaturize the titled device by using a magnetic circuit of a linear motor giving a moving torque to a holding member holding an objective lens and its servo drive mechanism in common with a magnetic circuit for a speed detection means detecting the moving speed of the holding member. CONSTITUTION:A couple of drive coils 21 are fitted to a pickup body 7 so that the coil center axis is in parallel with the moving direction of the body 7, a magnetic coil 20 generates a magnetic flux interlinked with the drive coil 21 to give a moving torque to a part corresponding to the mode of the primary lateral vibration of the moving optical system including the body 7. The detection coil 22 is wound to the peripheral of each drive coil 21 so as to be concentric to the coil center axis and the magnetic flux generated from the magnetic circuit 20 of the linear motor is interlinked with the detection coil 22. The moving speed of the body 7 is detected by the magnetic circuit 20 and the detection coil 22 to constitute the speed detection means to control the moving speed. That is, the magnetic circuit 20 constituting the linear motor is used in common for the magnetic circuit of the speed detection means.
    • 9. 发明专利
    • OPTICAL INFORMATION DISK
    • JPS647391A
    • 1989-01-11
    • JP15306387
    • 1987-06-19
    • PIONEER ELECTRONIC CORP
    • NAMIKI TORUMATSUI FUMIOSHIMODA KOSHIFUSE YOSHIAKI
    • B29C65/08G11B7/24G11B7/26G11B23/00
    • PURPOSE:To obtain a hub not exfoliated in drive direction and axial direction by welding and incorporating a metallic plate and an resin made hub member by ultrasonic wave press fit in inserting and fixing the metallic plate laminated hub member into a center hole of a disk base. CONSTITUTION:A center hole 23 is made to the center of a transparent plastic disk base 21 whose one face is provided with a recording film 22 and the metallic plate lamination hub member 24 is fitted and fixed thereto. In this case, the member 24 consists of the cylindrical resin made hub member 26 having the center hole 25 and a metallic disk plate 28 having the center hole 27 of a small disk imbedded in the recess. The metallic plate 28 is made of magnetic substance stainless steel withstanding rust and the center hole 27 provided thereto is made smaller than the inner diameter of the center hole 25 of the member 26. Moreover, an annular projection 33 is provided at the outside of an annular recessed part 32 with the metallic plate 28 imbedded thereto and a hardened layer N by nitride processing is formed to the circumferential wall of the center hole 27 is formed as required to prevent wear of the center hole 27.