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Moving position detector of mobile element and disk apparatus using same

A technology of moving parts and detection devices, which is applied in the direction of measuring devices, transducing head devices, and electric devices, etc., and can solve problems such as inability to drive push-type switches, deviation from specified positions, etc.

Inactive Publication Date: 2001-05-23
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Therefore, when the working pressure and the reaction force cannot balance each other, that is to say, when the reaction force of the push switch and the working pressure of the pick-up mechanism are not adjusted properly, if the pick-up mechanism is moved to the end of the disk along the radial direction of the disk surface Inner or outermost circumference, push-type switches cannot be driven
In addition, if the pick-up mechanism is driven, the pick-up mechanism may deviate from the specified position due to the elastic force of the switch after the drive is completed.

Method used

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  • Moving position detector of mobile element and disk apparatus using same
  • Moving position detector of mobile element and disk apparatus using same
  • Moving position detector of mobile element and disk apparatus using same

Examples

Experimental program
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Embodiment 1

[0053] A pick-up device for a disk device will be described below, which is an embodiment of the device for detecting the moving position of the movable part of the present invention.

[0054] FIG. 1 is a perspective view of main parts of a motion position detection device according to an embodiment of the present invention; FIG. 2 is a partially enlarged view of the motion position detection device shown in FIG. 1 .

[0055] In FIGS. 1 and 2 , the motion position detection device includes a pickup mechanism 3 as a movable part; electrode supports 4a, 4b, 7; detection electrodes 5, 6; detectors 11a, 11b and a drive shaft 10. The electrode supports 4a, 4b, 7 include movable part guide shafts 4a, 4b and conductive electrodes 7, and the movable part guide shafts 4a, 4b include a first movable part guide shaft 4a and a second movable part guide shaft 4b. Conductive electrodes 7 are provided at specific positions on the surface of the movable member guide shaft 4a. The detection e...

Embodiment 2

[0065] The moving position detection device of the movable part in another embodiment of the present invention will be introduced below in conjunction with the relevant drawings. Components that are the same as those in the previous embodiment are denoted by the same reference numerals as above, and will not be described again.

[0066] Fig. 4 is a perspective view of main parts of a moving position detecting device of a movable member in Embodiment 2 of the present invention. Fig. 5, Fig. 6(a) and Fig. 6(b) are partial enlarged views of the movement position detecting device in Fig. 4 .

[0067] In Fig. 4 and Fig. 5, the motion position detecting device comprises the pick-up device 3 used as the movable part, the movable part guide shaft 4a, 4b, the drive shaft 10, the conductive electrode 7, the detection electrode 5, 6 and the detector 11a, the conductive electrode 7 is provided at a specific position on the surface of the feed screw 10 serving as a drive shaft. A rack 12...

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Abstract

In a moving position detecting apparatus of mobile element for detecting when the mobile element moving along a specified running path has reached a specified position, such as a pickup device of a disk apparatus, without applying reaction to the mobile element, move of the mobile element from the specified position is lessened and eliminated. The position detecting apparatus for detecting the moving position of a mobile element includes the mobile element moving reversibly along a specified running path, conductive electrode disposed along said running path, detecting electrode disposed on the mobile element, and detecting means for detecting contact or non-contact between the conductive electrode and detecting electrode. The detecting electrode is disposed so as to contact or not to contact with the conductive electrode by the move of the mobile element. The position of the mobile element is detected by the detecting means. This position detecting means further includes a guide shaft for guiding the move of the mobile element, and a drive shaft for driving the mobile element. The conductive electrode is disposed on the surface of the guide shaft or the surface of the drive shaft. The detecting electrode is disposed so as to contact electrically with the conductive electrode from the direction crossing with the moving direction of the detecting electrode.

Description

[0001] disk device using the device technical field [0002] The present invention relates to an information recording and reproducing device. Specifically, it relates to a movement position detection device of a movable member used in a disk drive. Background technique [0003] In conventional magnetic or optical disk devices, a pick-up mechanism is movable between the innermost and outermost circumferences of the disk surface. When the pick-up mechanism moves to a specific position, it is detected by a position detection device. In this way, the specific operation of the pick-up mechanism is automatically realized. [0004] Until now, the position detection devices used have been push switches. In this case, when the pickup mechanism moves to the innermost or outermost periphery of the disk, the pickup mechanism pushes the push switch from its moving direction, thereby detecting that the pickup has reached the innermost or outermost peripheral position. [0005] In a p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B7/00G11B7/00G11B7/085G11B19/14G11B21/08G11B21/12
CPCG11B21/083G11B19/14G11B21/12G11B7/08588G11B7/00G11B7/0857G11B17/028G11B19/2045G11B2220/20
Inventor 竹内一浩
Owner PANASONIC CORP