Title:
VIBRATION GENERATOR
Document Type and Number:
Japanese Patent JP3838747
Kind Code:
B
Abstract:
PROBLEM TO BE SOLVED: To improve exciting force, facilitate miniaturization and lightweight and also facilitate vibration analysis by constituting air gaps in the magnetic path of a vibration generator in two circuits, and disposing coils in the air gaps, respectively.
SOLUTION: Air gaps 8, 9 are formed in upper and lower two parts of and a guide hole 2C provided between the columnar shape inside yoke frame part member 2A of a yoke frame member 2 disposed in the body of a vibration generator 1 and a ring-shaped outside yoke frame member 2B surrounding the circumference, respectively. The vibration member 12 (12A, 12B) suspended on the body side through a spring member 10 for suspension can be vertically movably disposed in the air gaps 8, 9, and movable coil members 18, 19 fixed on the vibration member and positioned in the air gaps 8, 9 are provided. Lowering of a magnetic flux density gets ten-odd percent by the constitution, exciting force of about two times can be obtained, and since the power of an electric power amplifier supplying a signal to the vibration generator 1 in a high frequency area gets about half, its size can be half.
Inventors:
Ishita, Yoshio
Application Number:
JP1997000200489
Publication Date:
August 11, 2006
Filing Date:
July 25, 1997
Export Citation:
Assignee:
EMITSUKU KK
International Classes:
G01M7/02; G01M7/00; (IPC1-7): G01M7/02
Previous Patent: APPARATUS FOR HARDENING INNER SURFACE OF HOLLOW CYLINDRICAL BODY
Next Patent: INFRARED SENSOR AND OPTICAL SENSOR
Next Patent: INFRARED SENSOR AND OPTICAL SENSOR