Rotation detector

• US 7,170,282 B2
• Filed: 08/11/2004
• Issued: 01/30/2007
• Est. Priority Date: 09/05/2003
• Status: Expired due to Fees

• Current Assignee: Minebea Company Limited (MinebeaMitsumi Inc.)
• Original Assignee: Minebea Company Limited (MinebeaMitsumi Inc.)
• Inventors: Matsuura, Mutsumi
• Primary Examiner(s): Lefkowitz; Edward
• Assistant Examiner(s): WHITTINGTON, KENNETH
• Application Number:
  US10/916,178
• Publication Number:
  US 20050052180A1
• Time in Patent Office: 902 Days
• Field of Search: 73862331-862336, 324/207.25, 324/207.15, 324/207.16, 324/207.17, 310/71, 310/179, 310258-260, 295/96
• US Class Current: 324/207.25
• CPC Class Codes: G01D 3/08 with provision for safeguarding the apparatus, e.g. against abnormal operation, against breakdown
• CPC Class Codes: G01D 5/2086 by movement of two or more coils with respect to two or more other coils

Abstract

A rotation detector designed to prevent line disconnection from being caused by an abrupt thermal change, comprising cores (10, 30) arranged inside a cylindrical housing (1), pins (15a, 15b; 35a, 35b, 35c, 35d) attached to the cores (10, 30) and connected to coils (13, 23) of the cores (10, 30), protruding from a notch (1a) of the housing (1), and a connection base (50) electrically connected to the outside via a lead wire (59) and fixed to the pins (15a, 15b; 35a, 35b, 35c, 35d).

Claims

1. A rotation detector comprising:

outer cores and stator cores provided inside a cylindrical housing;

pins attached to the cores and connected to coils of the cores, the pins extending through a notch of the housing; and

a floating mechanism comprising a connection base electrically connected to an outside of the rotation detector via a lead wire and fixed to the pins, wherein the connection base is connected to the housing only through the pins.

2. The rotation detector according to claim 1, wherein the pins pass through a base holder having a circular-arc section provided on an outer periphery of the housing to fix the connection base.

3. The rotation detector according to claim 1, wherein the pins are attached to a bobbin via a bobbin terminal being attached to a side face of the bobbin or the pins are attached to a stator core terminal extending to an inner diameter position of an annular base plate and fixed thereto.