公开(公告)号：US5301078A

公开(公告)日：1994-04-05

申请号：US713994

申请日：1991-06-12

申请人： Toshiaki Makino ,  Marutomo Goto ,  Hideyuki Kimura ,  Takashi Yamaguchi ,  Hiromu Hirai ,  Takashi Kono ,  Ryoji Okada ,  Toshihiro Yamada ,  Yasuhiro Yoshimura ,  Hideaki Amano ,  Akio Takatsuka ,  Toshio Matsushita ,  Satoru Yamaura ,  Yuichi Koizumi

发明人： Toshiaki Makino ,  Marutomo Goto ,  Hideyuki Kimura ,  Takashi Yamaguchi ,  Hiromu Hirai ,  Takashi Kono ,  Ryoji Okada ,  Toshihiro Yamada ,  Yasuhiro Yoshimura ,  Hideaki Amano ,  Akio Takatsuka ,  Toshio Matsushita ,  Satoru Yamaura ,  Yuichi Koizumi

IPC分类号： G11B5/48 ,  G11B21/16

CPC分类号： G11B5/4813

摘要： A magnetic disk unit comprising a one-piece carriage structure having a small thermal off-tracking amount, with the carriage structure including a rotary shaft; guide arms integrally supported on a guide-arm retainer at their proximal ends and extending independently and parallely; bearing retainers formed on both ends of the guide-arm retainer; and bearings fixed on the bearing retainers rotatably connecting the guide-arm retainer to the rotary shaft. A center line in a direction of thickness of the outermost guide arm is located outside of that of the bearing in a direction of height thereof, and a concave portion is continuously formed on the bearing retainer. Thermal coefficients of expansion of the guide arms and the guide-arm retainer are substantially equal, with the carriage structure being fashioned of an alloy mainly containing Al and Si, eutectic crystal Si particles in the guide arm and/or the guide-arm retainer. The average value of the longest eutectic crystal Si particles therein is 1.6 .mu.m or less or the number of the eutectic crystal Si particles if 5.0 or more per 100 .mu.m.sup.2. In the carriage of manufacturing the carriage of the carriage structure is heated for five to fifteen hours at a temperature of 300.degree. to 500.degree. C. after die casting.

摘要翻译： 一种磁盘单元，包括具有小的热跟踪量小的单件托架结构，其中托架结构包括旋转轴; 引导臂在其近端处一体地支撑在引导臂保持器上并且独立且平行地延伸; 形成在引导臂保持器的两端的轴承保持器; 和固定在轴承保持器上的轴承，其将导向臂保持件可旋转地连接到旋转轴。 最外侧引导臂的厚度方向的中心线位于轴承的高度方向的外侧，在轴承保持架上连续地形成有凹部。 引导臂和引导臂保持器的热膨胀系数基本相等，托架结构由主要包含Al和Si的合金，共晶晶体Si颗粒在引导臂和/或引导臂保持器中形成。 其中最长的共晶晶体Si颗粒的平均值为1.6（my）m或更小，如果每100（m 2）m 2为5.0或更多，则共晶晶体Si颗粒的数量。 在制造的托架中，在铸造后，在300度至500度的温度下加热托架结构的托架5至15小时。

公开(公告)号：US4855853A

公开(公告)日：1989-08-08

申请号：US105018

申请日：1987-10-06

申请人： Toshio Matsushita ,  Hideaki Amano ,  Satoru Yamaura ,  Shigeo Nakamura ,  Yasusuke Nakada

发明人： Toshio Matsushita ,  Hideaki Amano ,  Satoru Yamaura ,  Shigeo Nakamura ,  Yasusuke Nakada

IPC分类号： G11B21/02 ,  G11B5/55 ,  G11B21/00 ,  G11B21/08 ,  H02K33/18

CPC分类号： G11B5/5521 ,  G11B21/08

摘要： An actuator mechanism for positioning magnetic heads includes arms that support a magnetic recording/reproducing head at one end thereof. Each of the arms is mounted about a shaft and supported for rotation. A coil support member is attached to the end of the arms opposite the head, and is made of a molded resin that integrally covers a voice coil motor used for causing the swinging movement of the arms. The molded resin of the coil support member is a synthetic resin mixed with a powered metal having a known specific gravity and thermal expansion coefficient. Thus, the weight of the synthetic resin can be adjusted to balance a portion including the magnetic heads and the arms with the coil support member in relation to the shaft. Additionally, the thermal expansion coefficient of the coil support member is selected to be substantially equal to that of the arms and the coil so that these components expand and contract to the same degree with variations in temperature to prevent deformation or cracks from occurring in the coil support member.

摘要翻译： 用于定位磁头的致动器机构包括在其一端支撑磁记录/再现头的臂。 每个臂都围绕轴安装并支撑以旋转。 线圈支撑构件附接到与头部相对的臂的端部，并且由模制树脂制成，其一体地覆盖用于使臂的摆动运动的音圈电机。 线圈支撑构件的模制树脂是与具有已知比重和热膨胀系数的动力金属混合的合成树脂。 因此，可以调节合成树脂的重量，以使线圈支撑构件相对于轴平衡包括磁头和臂的部分。 此外，线圈支撑构件的热膨胀系数被选择为与臂和线圈的热膨胀系数基本相等，使得这些部件随着温度变化而膨胀和收缩到相同程度，以防止在线圈中发生变形或裂纹 支持会员