Patent EP0376531A1 successfully refreshed from Google Patents.
EP0376531A1
Expired / Lapsed
EP
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Objective lens driving devices
Assignee: Sony Corp
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Filing: 1989-12-11
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Granted: —
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Expires: 2009-12-11
Abstract
Abstract An objective lens driving device employed in an optical pick-up device of a recording and/or reproducing apparatus for an optical disc includes an objective lens bobbin (2) mounting an objective lens (1), objective lens supporting members (3) for movably supporting the lens bobbin (2) in the focusing direction and in the tracking direction, and an electromagnetic driving unit (4, 5, 6, 7) for driving the objective lens (1). Each objective lens supporting member (3) is formed by bending a single spring plate in the form of a rectangular frame and includes a pair of supporting arm sections (16) extending parallel to each other, a pair of connecting plate sections (15) interconnecting both ends of the supporting arm sections (16) and resilient deflective sections (20) formed in the connecting plate sections (15).
Inventors
- 👤 Tomoyuki C/O Patents Division Ishida
- 👤 Yuhei C/O Patents Division Kobayashi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 21:36
CPC Classifications
G; G11; G11B; G11B7/00; G11B7/08; G11B7/09; G11B7/0925; G11B7/0932
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
185 words
An objective lens driving device employed in an optical pick-up device of a recording and/or reproducing apparatus for an optical disc, the device comprising: objective lens supporting members (3) each formed by bending a frame-shaped rectangular plate spring member and including a pair of supporting arm sections (16) extending parallel to each other and a pair of connecting plate sections (15) interconnecting both ends of said support arm sections (16), said connecting plate sections (15) being formed with resilient deflectable sections (20) which may be resiliently deflected only in the direction normal to the deflection along the thickness of the supporting arm sections (16) or in the direction of thickness of the connecting plate sections (15); an objective lens bobbin (1) in which an objective lens (2) and driving coils (6, 7) are mounted and which is supported for deflection in a direction parallel to the optical axis of the objective lens (2) and within a plane orthogonal to the optical axis of the objective lens (2); and magnets (5) supported within a magnetic yoke (4) and mounted for facing the driving coils (6, 7).
Claim 2
Dependent Claim
185 words
An objective lens driving device employed in an optical pick-up device of a recording and/or reproducing apparatus for an optical disc, the device comprising: objective lens supporting members (3) each formed by bending a frame-shaped rectangular plate spring member and including a pair of supporting arm sections (16) extending parallel to each other and a pair of connecting plate sections (15) interconnecting both ends of said support arm sections (16), said connecting plate sections (15) being formed with resilient deflectable sections (20) which may be resiliently deflected only in the direction normal to the deflection along the thickness of the supporting arm sections (16) or in the direction of thickness of the connecting plate sections (15); an objective lens bobbin (1) in which an objective lens (2) and driving coils (6, 7) are mounted and which is supported for deflection in a direction parallel to the optical axis of the objective lens (2) and within a plane orthogonal to the optical axis of the objective lens (2); and magnets (5) supported within a magnetic yoke (4) and mounted for facing the driving coils (6, 7).
Claim 3
Dependent Claim
18 words
A device according to claim 1 wherein there are provided a pair of objective lens supporting members (3).
Claim 4
Dependent Claim
34 words
A device according to claim 2 wherein the supporting plate sections (16) of said supporting arm sections (3) are formed by being bent at 90 o with respect to the connecting plate sections (15).
Claim 5
Dependent Claim
67 words
A device according to claim 3 wherein supporting pieces (18, 19) are provided on the other sides of said connecting plate sections (15) to said supporting arm sections (16) so as to be deflected only in the direction normal to the deflection in the direction of the thickness of the supporting arm sections (16) or in the direction of the thickness of the connecting plate sections (15).
Claim 6
Dependent Claim
21 words
A device according to claim 1 wherein said resilient deflecting sections (20) are formed by a plurality of connecting sections (20a).
Claim 7
Dependent Claim
21 words
A device according to claim 1 wherein said resilient deflecting sections (45) are formed with a plurality of tiny slits (46).
Claim 8
Dependent Claim
31 words
A device according to claim 2 wherein the supporting plate sections (31) of said supporting arm sections (30) are provided with adjustment means (32) for adjusting the resistance to resilient deflection.
Claim 9
Dependent Claim
19 words
A device according to claim 7 wherein the adjustment means (32) are in the form of U-shaped slits (32).
Claim 10
Dependent Claim
18 words
A device according to claim 7 wherein said adjustment means (42) comprise a plurality of tiny slits (42).
Claim 11
Dependent Claim
15 words
A device according to claim 7 wherein said adjustment means (52) comprise mesh sections (52).
Claim 12
Dependent Claim
28 words
A device according to claim 2 wherein the supporting plate sections (71) of said supporting arm sections (70) are of different widths at one and the other ends.
Claim 13
Dependent Claim
95 words
A device according to claim 3 wherein supporting pieces (63) are provided on the inner sides of the connecting plate sections (62) by means of said resilient deflecting sections so as to be deflected only in the direction normal to the deflection in the direction of the thickness of the supporting arm sections (61) or in the direction of the thickness of the connecting plate sections (62) and wherein reinforcements (64) are provided on the outer sides of the connecting plate sections (62) to be connected to both ends of said supporting arm sections (61).
Claim 14
Dependent Claim
21 words
A device according to claim 1 wherein a printed wiring board (300) is stuck to said objective lens supporting member (3).
References Cited (Backward Citations)
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