Title:
LIGHT REFLECTION TYPE ROTARY ENCODER
Document Type and Number:
Japanese Patent JPH02114122
Kind Code:
A
Abstract:
PURPOSE:To enable complete coincidence of a clicking sensitivity with a timing of generating a pulse signal by arranging one pulse plate in common for the generation of the clicking sensitivity and the generation of a pulse signal. CONSTITUTION:A pulse plate 28 comprises a glossy iron-based metal sheet and a light reflection section 26 and a nonlight reflection slit section 27 are arranged at a radial position almost the same as that of a ring-shaped magnet plate 23 of the bottom of a substrate section 21 alternately in continuity with the number thereof equal to magnetizing sections 23' of respective magnets. An optical element 33 wherein light emitting elements 31 and light receiving elements 32 are arranged in parallel facing the light reflection section 26 and the slit section 27 are fixed conductively at a conductor plate 30 inserted and formed in an insulation substrate 29 fixed on the top of the substrate section 21. Then, a clicking sensitivity is produced by a difference of a magnetically attracting force with respect to the light reflection section 26 and the slit section 27 while a pulse signal is generated depending on the reflection of or transmission of light with the light reflection section 26 or through the slit section 27 thereby ensuring coincidence of the clicking sensitivity with a timing of generating a pulse signal all the time.
Inventors:
ISHIHARA KOUSUKE
YAMAMOTO TAMOTSU
MATSUI HIROSHI
YAMAMOTO TAMOTSU
MATSUI HIROSHI
Application Number:
JP26846388A
Publication Date:
April 26, 1990
Filing Date:
October 25, 1988
Export Citation:
Assignee:
MATSUSHITA ELECTRIC IND CO LTD
International Classes:
G01D5/30; G01D5/244; G01D5/347; H01H5/02; H03M1/24; (IPC1-7): G01D5/30
Attorney, Agent or Firm:
Tomoyuki Takimoto (1 person outside)