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发明公开
CN103516095A 基板、基底单元、马达及盘驱动装置 失效 - 权利终止

基板、基底单元、马达及盘驱动装置
摘要：
本发明涉及一种基板、基底单元、马达以及盘驱动装置。该盘驱动装置的基板具有马达基底和基底主体部，其中马达基底位于中心轴线周围，马达主体部向马达基底的径向外侧扩展。马达基底包含第一种金属材料。基底主体部包含第二种金属材料。因此，抑制基板的中心轴线附近的部分的轴向厚度的同时能够抑制该部分的刚性下降。并且，马达基底具有凸缘部及塑性变形部。凸缘部及塑性变形部分别与基底主体部的内端部的轴向两端面的至少一部分接触。由此防止了马达基底的轴向脱落。
摘要（英）：

The invention relates to a base plate, base unit, motor and disk drive apparatus. A base plate of a disk drive apparatus includes a motor base disposed around a central axis and a base body portion extending radially outward of the motor base. The motor base is made of a metallic material of a first type. The base body portion is made of a metallic material of a second type. Thus, the axial thickness of a portion of the base plate close to the central axis can be significantly reduced and a reduction in the stiffness of the portion can be prevented. Further, the motor base includes a flange portion and a plastic deforming portion. The flange portion and the plastic deforming portion are respectively in contact with at least a portion of both axial end surfaces of an inner end portion of the base body portion. Thus, extraction of the motor base in the axial direction is prevented.

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