Rotary encoder having code member rotating along accurate circle as shaft rotates
First Claim
Patent Images
1. A rotary encoder, comprising:
- a casing;
a detection element attached to the casing; and
a rotatable rotor having a mounting aperture for inserting a shaft at the center thereof and being provided with a code member opposing to the detection element, wherein an inner peripheral surface of the mounting aperture is provided with a spring member having a base and a plurality of tongues for energizing the shaft toward the center of the mounting aperture so as to set a position of the shaft at the center of the mounting aperture, and wherein the spring member is formed of a long hoop-shaped metal plate, the plurality of tongues are in series with the base of the spring member so as to project from the base, and the spring member has a cylindrical shape due to a cutting operation on a hoop material to a length corresponding to a length in a direction of the diameter of the shaft and the cylindrical spring member is disposed so as to be wound around the shaft.
2 Assignments
0 Petitions
Accused Products
Abstract
An object of the present invention is to provide a rotary encoder that has a code member which rotates so as to draw an accurate circle as a shaft rotates. Such rotary encoder includes a casing; a detection element attached to the casing; and a rotatable rotor having a mounting aperture for inserting a shaft at the center thereof and being provided with a code member opposing to the detection element, in which an inner peripheral surface of the mounting aperture is provided with a spring member having a base and a plurality of tongues for energizing the shaft toward the center of the mounting aperture so as to set a position of the shaft at the center of the mounting aperture.
7 Citations
3 Claims
-
1. A rotary encoder, comprising:
-
a casing;
a detection element attached to the casing; and
a rotatable rotor having a mounting aperture for inserting a shaft at the center thereof and being provided with a code member opposing to the detection element, wherein an inner peripheral surface of the mounting aperture is provided with a spring member having a base and a plurality of tongues for energizing the shaft toward the center of the mounting aperture so as to set a position of the shaft at the center of the mounting aperture, and wherein the spring member is formed of a long hoop-shaped metal plate, the plurality of tongues are in series with the base of the spring member so as to project from the base, and the spring member has a cylindrical shape due to a cutting operation on a hoop material to a length corresponding to a length in a direction of the diameter of the shaft and the cylindrical spring member is disposed so as to be wound around the shaft. - View Dependent Claims (2, 3)
-
Specification
-
- Resources
Litigation Campaign Assessment
Thank you for your request. You will receive a custom alert email when the Litigation Campaign Assessment is available.
×
-
Current AssigneeALPS Electric Company Limited (Alps Alpine Co., Ltd.)
-
Original AssigneeALPS Electric Company Limited (Alps Alpine Co., Ltd.)
-
InventorsUchiyama, Hideki, Ogawa, Toshio, Okumura, Hirofumi
-
Primary Examiner(s)Aurora, Reena
-
Application NumberUS10/029,383Publication NumberTime in Patent Office592 DaysField of Search324/207.22, 324/207.25, 324/174, 324/207.21, 324/207.2, 324/160, 324/173, 384/448US Class Current324/207.25CPC Class CodesG01D 5/34738 Axles; Driving or coupling ...
