JPH0340663U

JPH0340663U -

Info

Publication number: JPH0340663U
Application number: JP9951189U
Authority: JP
Priority date: 1989-08-25
Filing date: 1989-08-25
Publication date: 1991-04-18

Description

【図面の簡単な説明】[Brief explanation of drawings]

第１図はこの考案の第１実施例に係る光学ヘツ
ドユニツトの移送装置の要部斜視図、第２図はそ
のコイルを示す正面図、第３図は第２実施例にお
けるコイルを分離して示す正面図、第４図は第３
実施例におけるコイルを示す断面図、第５図は従
来の光学ヘツドユニツト移動装置の一例を示す要
部斜視図である。図面において、１は光学ヘツドユニツト、６は
ヨーク、６ａはサイドヨーク部、６ｂはセンター
ヨーク部、７，８はマグネツト、２１は磁気回路
、２２はコイル、２３，４１はコイルボビン、２
４，４２は駆動用コイル、２５，４３は検出用コ
イル、２６，２７，３３，３４，３６，３７はフ
ランジ、２８は中間フランジ、３１は駆動用ボビ
ン、３２は検出用ボビン、３５は開口、３８は接
触ピンである。 Fig. 1 is a perspective view of essential parts of a transfer device for an optical head unit according to a first embodiment of this invention, Fig. 2 is a front view showing the coil thereof, and Fig. 3 is a separated view of the coil in the second embodiment. Front view, Figure 4 is the 3rd
FIG. 5 is a sectional view showing a coil in the embodiment, and a perspective view of a main part showing an example of a conventional optical head unit moving device. In the drawing, 1 is an optical head unit, 6 is a yoke, 6a is a side yoke part, 6b is a center yoke part, 7 and 8 are magnets, 21 is a magnetic circuit, 22 is a coil, 23 and 41 are coil bobbins, and 2
4, 42 are drive coils, 25, 43 are detection coils, 26, 27, 33, 34, 36, 37 are flanges, 28 is an intermediate flange, 31 is a drive bobbin, 32 is a detection bobbin, 35 is an opening , 38 are contact pins.

Claims

【実用新案登録請求の範囲】[Scope of utility model registration request]

駆動用磁気回路と、移動速度検出用磁気回路と
、ガイドシヤフトに沿つて移動自在に支持された
ヘツドユニツトと、前記駆動用磁気回路および前
記移動速度検出用磁気回路にそれぞれ対向して前
記ヘツドユニツトに設けられた駆動用コイルおよ
び検出用コイルとを備え、前記駆動用コイルに通
電することによつて前記ヘツドユニツトを駆動し
、その移動状態を前記検出用コイルによつて検出
して前記ヘツドユニツトの移送制御を行なうヘツ
ド移送装置において、前記駆動用磁気回路と移動
速度検出用磁気回路とが単一の磁気回路によつて
形成されるとともに、前記駆動用コイルと前記検
出用コイルとが一体的に形成されていることを特
徴とするヘツド移送装置。 a magnetic circuit for driving, a magnetic circuit for detecting moving speed, a head unit supported movably along a guide shaft, and a magnetic circuit provided in the head unit opposite to the magnetic circuit for driving and the magnetic circuit for detecting moving speed, respectively. The head unit is provided with a drive coil and a detection coil, and the head unit is driven by energizing the drive coil, and the moving state of the head unit is detected by the detection coil to control the transfer of the head unit. In the head transfer device, the drive magnetic circuit and the movement speed detection magnetic circuit are formed by a single magnetic circuit, and the drive coil and the detection coil are integrally formed. A head transfer device characterized by: