Title:
HINGE DEVICE
Document Type and Number:
Japanese Patent JP3517384
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To rotate a lid body of a portable telephone set to a close position or open position by a leaf spring as soon as the lid body slightly rotates from a neutral position while the amount of elastic deformation of the leaf spring is small.
SOLUTION: A cam part 5 comprises first-fifth arc surfaces 51-55. The first arc surface 51 is so provided that the leaf spring part 22 contacts an intersection part 56 with an orthogonal line Lp which runs a center of curvature and crosses a rotational axis line L by a right angle when a lid body C of the portable telephone set is at a neutral position. The second and third arc surfaces 52 and 53 are provided on both sides of the first arc surface. The radius of curvature of the second and third arc surfaces is smaller than that of the first arc surface 51.
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Inventors:
Oshima, Kazuyoshi
Imai, Katsuya
Imai, Katsuya
Application Number:
JP2000101880A
Publication Date:
April 12, 2004
Filing Date:
April 04, 2000
Export Citation:
Assignee:
SUGATSUNE IND CO LTD
International Classes:
E05F1/12; E05D11/10; F16C11/10; G06F1/16; H05K5/02; H05K5/03; H04M1/02; (IPC1-7): E05F1/12; F16C11/10; H05K5/02; H05K5/03
Attorney, Agent or Firm:
渡辺 昇
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