The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 18, 2005
Filed:
Dec. 20, 2002
Kazuya Tamura, Isehara, JP;
Yoshinori Tangi, Hachiouji, JP;
Eiichi Yoneyama, Atsugi, JP;
Hiromi Inoguchi, Tama, JP;
Kazuya Tamura, Isehara, JP;
Yoshinori Tangi, Hachiouji, JP;
Eiichi Yoneyama, Atsugi, JP;
Hiromi Inoguchi, Tama, JP;
Mitsumi Electric Co., Ltd., Tokyo, JP;
Abstract
In the engaging structure of a lead screw () with a head lift body (), for simplification of a feeding side mechanism and improvement of feeding accuracy, the head lift body has only one fingernail shaped protrusion () as a member engaging with an external thread of the lead screw (). The protrusion () is provided on an internal wall surface of a bearing portion () formed in an integral structure with the head lift body (). Accordingly, the engagement of the external thread of the lead screw and the single protrusion converts the rotation movement of the lead screw () to the linear movement of the head lift body (). As a result, a feeding accuracy in the linear movement converted from the rotation movement is only determined by a feeding accuracy of only the lead screw (). In an example, the protrusion is a half-moon shaped plate.