Hinge device for keeping open/close of foldable equipment

Application Number: 00108796
Application Date: 2000.05.29
Publication Number: 1275517
Publication Date: 2000.12.06
Priority Information: 1999/5/31 JP 151708/99
International: E05D11/10
Applicant(s) Name: Sugatsune Industries K. K.
Inventor(s) Name: Imai Katsuya
Patent Agency Code: 31100
Patent Agent: wang hongxiang
Abstract There is provided a hinge device for a foldable apparatus which comprises a first member provided with a first hinge sleeve rigidly secured thereto and with a first abutment peripheral edge and a second member provided with a second hinge sleeve with a second abutment peripheral edge slidably held in abutment with the first abutment peripheral edge; wherein said hinge device further comprises a first disk unrotatably fitted into said first hinge sleeve and a second disk unrotatably fitted into said second hinge sleeve; and either the first abutment facet of the first disk or the second abutment facet of the second disk being provided with a plurality of engaging recesses arranged at predetermined angular positions thereof; the other being provided with a plurality of engaging projections adapted to become engaged with the each engaging recesses under the effect of resilient force of a coil spring, the engagement of said engaging projections and said engaging recesses being switched by an opening or closing motion of the first and second members.