Shaft supporting structure and optical disc apparatus...

G - Physics – 11 – B

Patent

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Details

G11B 7/08 (2006.01) G11B 21/02 (2006.01)

Patent

CA 2744841

The invention allows for restriction of radial and axial movements of a shaft by a simple structure. A shaft supporting structure includes a base (3) provided with a bearing (7), and a first shaft (23) arranged at the bearing (7). The shaft supporting structure further includes a helical torsion spring (4) fitted on the first shaft (23). The base (3) includes a first engagement hole (31a), and a hooked section (74) engaging with first and second arm sections (41, 42) of the helical torsion spring (4), respectively. The helical torsion spring (4) presses the first shaft (23) onto the bearing (7) in a radial direction of the shaft by an elastic force generated by engagement between the first arm section (41) and the first engagement hole (31a) of the base (3), and engagement between the second arm section (42) and the hooked section (74) of the base (3). A portion of the second arm section (42) faces an axial end face of the first shaft (23).

Linvention concerne une structure simple permettant de réguler les mouvements dun arbre dans le sens radial et dans le sens axial. Une structure de support darbre comprend une base (3) comprenant un palier (7), et un premier arbre (23) disposé dans le palier (7). La structure de support darbre comprend en outre un ressort hélicoïdal de torsion (4) dans lequel le premier arbre (23) est inséré. La base (3) comprend un premier trou de contact (31a) et un crochet (74) qui entrent respectivement en contact avec des premier et second bras (41, 42) du ressort hélicoïdal de torsion (4) du fait de la force élastique générée par le contact entre le premier bras (41) et le trou de contact (31a) de la base (3), et par le contact entre le second bras (42) et le crochet (74) de la base (3), le ressort hélicoïdal de torsion (4) presse le premier arbre (23) dans son sens radial contre le palier (7). Une partie du second bras (42) est située de manière à être opposée à une extrémité dans le sens radial de larbre (23).

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