JPS63184444U - - Google Patents

Description

[Brief explanation of drawings]

1 to 5 are diagrams showing an embodiment of the disk rotation drive device according to this invention, and FIG.
2 is a plan view with the rotating plate removed, and 3 is a sectional view taken along the line - in FIG. 2.
Figure 4 is the front view, Figure 5 is the back view of Figure 2, and Figure 6 is the back view of Figure 2.
10 to 10 are diagrams showing a conventional disk rotation drive device, in which FIG. 6 is a plan view, FIG. 7 is a sectional view taken along the line -- in FIG. 6, and FIG. 8 is a plan view with the rotating plate removed. Figure 9 is an enlarged cross-sectional view taken along the line - in Figure 8;
The figure is a sectional view of the support shaft portion in FIG. 9. In the figure, 1 is a recording medium, 2 is a rotating plate, 2a is a center hole, 2b is a window hole, 3 is a pedestal, 4 is a rotating shaft, 5 is an arm plate, 7 is a drive pin, 8 is an elastic body, and 12 is a suction plate,
12b is a support shaft, and 13 is a retaining plate. In addition,
The same reference numerals in the figures indicate the same or corresponding parts.

Amendment October 8, 1982 The scope of claims for utility model registration is amended as follows.

[Claims for Utility Model Registration] A plate-shaped recording medium is fixed and has a central hole in the center into which the tip of a rotating shaft of an electric motor is loosely fitted, and has a window hole at an eccentric position with respect to the central hole. a rotary plate, a pedestal made of a permanent magnet arranged corresponding to the rotary plate and fixed to the rotating shaft and having at least an outer peripheral portion formed of a molded material; and a pedestal arranged on the back side of the pedestal and protruding from the pedestal. an arm plate pivotally supported on a supporting shaft so as to be displaceable in the axial direction; A drive pin that moves by engaging with a window hole of the rotary plate; and an elastic body that is provided on the pedestal and engages with the arm plate to bias the drive pin in the radial direction of the rotary shaft, A disk rotation drive device comprising a support shaft formed by raising a part of the pedestal, and a stop plate for preventing the arm plate from coming off at the tip of the support shaft.

Claims (1)

[Scope of utility model registration request] A rotary plate fixed to a plate-shaped recording medium, having a center hole in the center into which the tip of a rotating shaft of an electric motor is loosely fitted, and having a window hole at an eccentric position with respect to the center hole; A pedestal made of a permanent magnet arranged correspondingly and fixed to the rotating shaft and having at least the outer periphery formed of a molded material; an arm plate that is pivotally supported so as to be displaceable and receives an adsorption force from the pedestal; and a rotary plate that is supported by the other end of the arm plate and projects through the pedestal with the arm plate in contact with the pedestal; a drive pin that moves by engaging with a window hole of the support shaft; and an elastic body that is provided on the pedestal and engages with the arm plate to bias the drive pin in the radial direction of the rotating shaft, A disk rotation drive device comprising: a part of the pedestal formed by raising it; and a retaining plate for preventing the arm plate from coming off at the tip of the support shaft.