JPH0171359U - - Google Patents

Description

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

図面は本考案の一実施例を示したものであつて
、第１図はヘツド移動装置全体の平面図、第２図
はヘツド移動装置の要部の平面図、第３Ａ図及び
第３Ｂ図はピボツト軸受を説明する断面図、第４
図は長さ補正機構を説明する一部切欠き平面図、
第５Ａ図〜第５Ｃ図はレバーへの紐状部材の取付
け構造を説明する斜視図、第６図はメインシヤー
シへのサブシヤーシの取付け構造を説明する分解
斜視図、第７図は第１図の〜矢視での断面図
、第８図は上記取付け構造の要部の断面図である
。 なお図面に用いた符号において、１０……ヘツ
ド移動装置、１４……磁気ヘツド、１６……リー
ドスクリユー、２０……ステツピングモータ（粗
動用モータ）、２８……紐状部材、３０……ステ
ツピングモータ（微動用モータ）、３４……レバ
ー、３６……引張ばね、４４……長さ補正機構、
４６……調整ねじ、Ｐ_１……軸線、Ｐ_２……接触
点、Ｐ_３……設計センターライン、Ｏ_１……レバ
ーの回転中心、である。 The drawings show one embodiment of the present invention, in which Fig. 1 is a plan view of the entire head moving device, Fig. 2 is a plan view of the main parts of the head moving device, and Figs. 3A and 3B are plan views of the main parts of the head moving device. Cross-sectional view explaining the pivot bearing, No. 4
The figure is a partially cutaway plan view explaining the length correction mechanism.
5A to 5C are perspective views illustrating the attachment structure of the string-like member to the lever, FIG. 6 is an exploded perspective view illustrating the attachment structure of the sub chassis to the main chassis, and FIG. A sectional view taken in the direction of arrows, and FIG. 8 is a sectional view of a main part of the above-mentioned mounting structure. In the symbols used in the drawings, 10...head moving device, 14...magnetic head, 16...lead screw, 20...stepping motor (coarse movement motor), 28...string-like member, 30... Stepping motor (fine movement motor), 34... lever, 36... tension spring, 44... length correction mechanism,
46...adjustment screw, _P1 ...axis, _P2 ...contact point, _P3 ...design center line, _O1 ...rotation center of the lever.

Claims (1)

【実用新案登録請求の範囲】 リードスクリユーを組動用モータにて回転させ
ることによつてヘツドを粗動させ、前記リードス
クリユーを微動機構にて軸線方向に微動させるこ
とによつて前記ヘツドを微動させるように構成し
、 長さ方向の両端が相互に固定された複数本の紐
状部材と、該紐状部材の一端を回転駆動する微動
用モータと、前記紐状部材の他端を引張り付勢す
るばね及び該紐状部材の他端にて回転されるレバ
ーとによつて前記微動機構を構成し、前記微動用
モータにて前記紐状部材の一端を回転して該紐状
部材を相互にからませるように捩ることにより、
該紐状部材の長さを前記ばねに抗して微小に変化
させ、この長さの変化によつて回転される前記レ
バーにて前記リードスクリユーを軸線方向に微動
させるように構成したヘツド移動装置において、 前記リードスクリユーと前記レバーとの接触点
の位置を前記レバーの回転方向に移動調整して、
前記紐状部材の長さを補正する調整ねじを設けた
ことを特徴とするヘツド移動装置。[Claims for Utility Model Registration] The head is coarsely moved by rotating the lead screw with an assembly motor, and the head is moved finely by finely moving the lead screw in the axial direction with a fine movement mechanism. A plurality of string-like members configured to be moved slightly and having both lengthwise ends fixed to each other, a fine movement motor that rotationally drives one end of the string-like members, and a motor that pulls the other end of the string-like members. The fine movement mechanism is composed of a biasing spring and a lever rotated at the other end of the string member, and the fine movement motor rotates one end of the string member to move the string member. By twisting them so that they become entwined with each other,
A head movement configured to minutely change the length of the string-like member against the spring, and cause the lever rotated by the change in length to slightly move the lead screw in the axial direction. In the apparatus, the position of the contact point between the lead screw and the lever is moved and adjusted in the rotational direction of the lever,
A head moving device comprising an adjustment screw for correcting the length of the string-like member.