JPH0458081U

JPH0458081U -

Info

Publication number: JPH0458081U
Application number: JP9905290U
Authority: JP
Priority date: 1990-09-25
Filing date: 1990-09-25
Publication date: 1992-05-19
Anticipated expiration: 2005-09-25
Also published as: JP2519318Y2

Description

[Brief explanation of the drawing]

第１図乃至第５図はこの考案に係るリニアモー
タの実施例を示し、第１図は一部を破断した斜視
図、第２図は作用を示す断面図、第３図はコイル
枠と光ピツクアツプを一体に設けた一部を破断し
た斜視図、第４図は箱状ヨークの第２の実施例を
示す斜視図、第５図は箱状ヨークの第３の実施例
を示す斜視図である。第６図及び第７図は従来例
のリニアモータを示し、第６図は斜視図、第７図
は作用を示す断面図である。主な符号の説明、１……円棒ヨーク、２……駆
動コイル、２ａ……コイル枠、３……偏平マグネ
ツト、４……箱状ヨーク、４ａ……長辺側部、４
ｂ……短辺側部、４ｃ……底面、５……光ピツク
アツプ、５ａ……ガイド孔、６……ガイドロツド
、７……三角孔付箱状ヨーク、８……凹形箱状ヨ
ーク。 Figures 1 to 5 show an embodiment of the linear motor according to this invention. Figure 1 is a partially cutaway perspective view, Figure 2 is a sectional view showing the operation, and Figure 3 is a coil frame and a light beam. FIG. 4 is a perspective view showing a second embodiment of the box-like yoke, and FIG. 5 is a perspective view showing a third embodiment of the box-like yoke. be. 6 and 7 show a conventional linear motor, with FIG. 6 being a perspective view and FIG. 7 being a sectional view showing the operation. Explanation of main symbols: 1...Cylindrical yoke, 2...Drive coil, 2a...Coil frame, 3...Flat magnet, 4...Box-like yoke, 4a...Long side part, 4
b... Short side, 4c... Bottom, 5... Optical pickup, 5a... Guide hole, 6... Guide rod, 7... Box-shaped yoke with triangular hole, 8... Concave box-shaped yoke.

Claims

[Claims for Utility Model Registration] 1. In a linear motor that is placed in a magnetic field and is slidably supported by a yoke inserted into a hollow part, and is energized to drive the drive coil to slide along the yoke. A rod-shaped yoke is inserted into the hollow part of the drive coil, a flat magnet is fixed to each end of the rod-shaped yoke to form a magnetic yoke, and one opening is provided so that the magnetic yoke is fixed in the center. A rectangular box-shaped yoke is provided, and both ends of the magnetic yoke are fixed to both short sides of the box-shaped yoke so as to be equidistant from both long sides and the bottom surface of the box-shaped yoke. A linear motor characterized in that the drive coil is configured to slide along a rod-shaped yoke by energizing the drive coil. 2. The linear motor according to claim 1, wherein the height of both long sides of the box-shaped yoke is increased from both ends toward the vicinity of the center to reduce magnetic resistance. 3. The linear motor according to claim 1 or 2, wherein the rod-shaped yoke is common to a guide rod that slidably supports the optical pickup. 4. The linear motor according to claim 1, 2 or 3, characterized in that an optical pickup is connected to the drive coil.