Silent warning vibration generator for portable equipment

Details Silent warning vibration generator for portable equipment Silent warning vibration generator for portable equipment

1994-08-10

1997-02-11

Dougherty, Thomas M.

Electrical generator or motor structure

Dynamoelectric

Reciprocating

310 17, 310 21, 310 29, 34082546, H02K 3300

Patent

active

056024320

ABSTRACT:
A vibration generator in a pager or massage device for giving vibration to the user including a coil fixed to a base and a movable member vibratably supported on the base. The movable member has inner and outer yokes defining therebetween a magnet gap in which the coil is inserted and a magnet for causing magnetic flux in the magnetic gap. A parallel four-bar linkage structure with a cantilevered leaf spring, a turnover leaf spring, or two diaphragm springs supports the movable member on the base.

REFERENCES:
patent: 2632791 (1953-03-01), Side
patent: 3333219 (1967-07-01), Makino
patent: 4680492 (1989-07-01), Tamura
patent: 4710655 (1987-12-01), Masaki
patent: 4864276 (1989-09-01), Tribbey et al.
patent: 5107540 (1992-04-01), Mooney et al.
patent: 5172092 (1992-12-01), Nguyen et al.
patent: 5327120 (1994-07-01), McKee et al.
patent: 5361243 (1994-11-01), Kasahara

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