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Nonmetallic Processes

Method-formaking-and-producing-object-lens-holder

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Method formaking and producing object lens holder

Details

Inventors: Goda, Yoshimasa;
Assignee: Sony Corporation (Tokyo, JP)
Primary Examiner: Echols; P. W.
Assistant Examiner:
Attorney, Agent or Firm: Limbach & Limbach L.L.P.

An object lens holder for holding an object lens for converging a laser light radiated from a laser light source on a signal recording surface of an optical recording medium includes a bobbin part formed by abutting and connecting first and second bobbin halves which are counterparts to each other, a holder part formed by abutting and connecting first and second holder halves which are counterparts to each other, which holder part is used as a mounting supporting part to a supporting base plate, first and second resilient deflecting members arranged in parallel to each other for interconnecting the first bobbin half and the first holder half, and third and fourth resilient deflecting members arranged in parallel to each other and to the first and second resilient deflecting members for interconnecting the second bobbin half and the second holder half. This object lens holder may be assembled continuously and in larger quantities, and is a component of an object lens driving device for accurately driving and displacing the object lens in a direction along its optical axis and in a direction normal to this optical axis.

DETAILED DESCRIPTION It is therefore an object of the present invention to provide an object lens driving apparatus whereby the problems inherent in the above-mentioned axial sliding rotating type object lens driving apparatus, wire-supported type object lens driving apparatus or in the molded-hinge type object lens driving apparatus can be overcome.
It is another object of the present invention to provide an object lens driving apparatus which can be assembled easily.
It is a further object of the present invention to provide an object lens driving apparatus in which accurate focusing and tracking controlling operations can be achieved in conformity accurately to the focusing and tracking controlling signals.
It is a further object of the present invention to provide an object lens holder enabling such object lens driving apparatus to be assembled continuously and produced in large quantities, and a method for producing such object lens holder.
It is yet another object of the present invention to provide an object lens holder block enabling the object lens driving apparatus to be assembled continuously and produced in large quantities.
The object lens holder according to the present invention is constituted by abutting and interconnecting a first bobbin half and a second bobbin half each provided with at least a pair of resilient deflecting members, and may be resiliently deflected via resilient deflecting members of the bobbin halves abutted and interconnected to each other.
The method for producing the object lens holder according to the present invention comprises abutting and interconnecting first and second bobbin halves formed integrally of synthetic resin to a thin sheet member formed with resilient deflecting members, and severing these abutted and interconnected first and second bobbin halves from the sheet-like member.
The object lens holder may be resiliently deflected via resilient deflecting members formed integrally with the first and second bobbin halves.
With the object lens holder block according to the present invention, plural bobbin halves are integrally molded with base pieces integrally formed with one of the first and second parallel strip-shaped portions provided with positioning holes and interconnected by plural connecting pieces, so that the bobbin halves may be abutted and interconnected with the positioning holes formed in the first and second strip-shaped portions as the reference

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