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1. 发明专利

JPH11306549A OPTICAL PICKUP DEVICE 失效
公开(公告)号：JPH11306549A
公开(公告)日：1999-11-05
申请号：JP11126398
申请日：1998-04-22
申请人： SANKYO SEIKI SEISAKUSHO KK
发明人： SHIRATORI TOSHIO
IPC分类号： G11B7/08 , G11B7/09
摘要： PROBLEM TO BE SOLVED: To mount an optical element on a frame with high positioning accuracy even when the frame is miniaturized and made thin. SOLUTION: Among optical systems 3 provided in an optical pickup device 1, first and second laser diodes 31 and 37, a full-reflection mirror 35 and a light receiving element 40 are fixed to an aluminum diecast frame 2, and an objective lens 36 is mounted on the frame 2 by interpolating an objective lens driving device 6. Remaining optical elements, i.e., a prism 33, a collimator lens 34, a half mirror 38 and a cylindrical lens 39, are attached to a resin-formed optical element fixing block 5 separate from the frame 2. In the optical element fixing block 5, a positioning surface is formed for each optical element. For mounting the optical element fixing block 5 on the frame 2, the position of the optical element fixing block 5 is adjusted.

2. 发明专利

JPH10302295A OPTICAL PICKUP 失效
公开(公告)号：JPH10302295A
公开(公告)日：1998-11-13
申请号：JP10564097
申请日：1997-04-23
申请人： SANKYO SEIKI SEISAKUSHO KK
发明人： YANAGISAWA KATSUSHIGE , SHIRATORI TOSHIO , KASUGA IKUO
IPC分类号： G11B7/135
摘要： PROBLEM TO BE SOLVED: To obtain an optical pickup comprising two types of dedicated light source for recording/reproducing different kinds of optical recording media in which the optical system is constituted compactly and inexpensively. SOLUTION: First and second laser lights L1, L2 from laser diodes 4, 5 for DVD and CD are introduced to a common optical path 6 and the returning light from an optical recording medium is introduced to a common photodetector 11 by an optical waveguide system 20. The optical waveguide system 20 comprises a half mirror 21 having a first partial reflecting face 21a for partially reflecting the laser light L1 and transmitting the laser light L2, and a prism 22 having a second partial reflecting face 22a for partially reflecting the laser liqht L2 and transmitting the laser light L1. The laser diodes 4, 5 are arranged at positions conjugate to a photodetector 10. Consequently, the majority of the optical system from the laser diodes 4, 5 to the optical recording medium and the optical system for introducing the returning light from the optical recording medium to a photodetector 11 can be shared resulting in an inexpensive compact optical pickup.

3. 发明专利

JPH10334490A OBJECTIVE LENS DRIVING DEVICE AND ITS MANUFACTURE 失效
公开(公告)号：JPH10334490A
公开(公告)日：1998-12-18
申请号：JP13806897
申请日：1997-05-28
申请人： SANKYO SEIKI SEISAKUSHO KK
发明人： SHIRATORI TOSHIO
IPC分类号： F16C17/02 , G11B7/09
摘要： PROBLEM TO BE SOLVED: To enhance both rigidity of a lens holder and sliding performance of a bearing hole by constituting the lens holder of a magnesium compact and constituting the inner circumferential surface of the bearing hole of a slidable material such as resins, etc. SOLUTION: A holder body 30 equipped with a lens fitting part 37 of the lens holder 3 is constituted of the magnesium compact to enhance the rigidity of the lens holder 3 as a whole without complicating the holder body 30 in shape. Therefore, a high-order oscillatory frequency of the lens holder 3 is shifted to a high band to enable the lens holder 3 to be driven at high speed. Moreover, by constituting a sliding surface between the lens holder 3 and a holder supporting shaft 34, of a bearing member 5 made of resins, a sliding characteristic between this holder supporting shaft 34 and the bearing hole 51 is kept in its high performance as it is. Then, the bearing member 5 has a cylindrical simple shape with high molding accuracy, and hence the accuracy of the bearing hole 51 can be higher compared with the case of integral compact of the whole lens holder 3, thus improving a pickup performance.

4. 发明专利

JP2001077502A COMPONENT FIXING STRUCTURE AND OPTICAL PICKUP DEVICE 失效
公开(公告)号：JP2001077502A
公开(公告)日：2001-03-23
申请号：JP24984199
申请日：1999-09-03
申请人： SANKYO SEIKI SEISAKUSHO KK
发明人： SHIRATORI TOSHIO , KOMATSU RYOJI
IPC分类号： G11B21/02 , H05K1/18 , H05K3/34
摘要： PROBLEM TO BE SOLVED: To effectively and firmly solder a terminal part of a component to a retaining board via a printed board. SOLUTION: This component fixing structure is provided with an FPC circuit pattern forming member 1, where a terminal part 14 of a light receiving element and terminal connecting parts 3, 16 are installed and a through hole 2 superior in flow of solder and adhesion is formed on the terminal connecting parts, and a retaining board 15. Solder 19 which is made to flow from the terminal connecting part 16 side of the FPC circuit pattern forming member passes the through hole and flows into a slit part 5 formed between the retaining board and the circuit pattern forming member, so that a fixing state between the terminal part of a light-receiving element and the retaining board becomes firm.

5. 发明专利

JPH10312555A OBJECTIVE-LENS DRIVING DEVICE 失效
公开(公告)号：JPH10312555A
公开(公告)日：1998-11-24
申请号：JP11777197
申请日：1997-05-08
申请人： SANKYO SEIKI SEISAKUSHO KK
发明人： SHIRATORI TOSHIO
IPC分类号： G11B7/09
摘要： PROBLEM TO BE SOLVED: To provide an objective-lens driving device which can be made thin without lowering the magnetic driving characteristic of a magnetic drive circuit used to drive an objective lens. SOLUTION: In an objective-lens driving device, a driving coil 8A for focusing and a driving coil 9A for tracking are attached circumferentially in an adjacent state with reference to the outer circumferential face 3b of a lens holder 3, a first arc-shaped magnet 11A and a second arc-shaped magnet 12A whose inner circumferential faces are set to be oppositely magnetized faces are attached to an outer yoke wall part 5b circumferentially in an adjacent state, the driving coil 8A for focusing is used as an air-core coil which is arranged in a state that an air core 83 turns to a focusing direction, the driving coil is made to face the first magnet, and the driving coil 9A, for tracking, as an air-core coil is faced in a state that it stretches over the first and second magnets 11A, 12A. Thereby, even when the lens holder 3 is made thin, and even when the length of the driving coil 8A for focusing is made short, its magnetic sensitivity can be maintained to be good, and the device 1 can be made easily thin.

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