Very small displacement enlargement mechanism and printing head

Details Very small displacement enlargement mechanism and printing head Very small displacement enlargement mechanism and printing head

1988-12-08

1990-12-11

Wiecking, David A.

Typewriting machines

Typing by other than type-face or type-die

Character formation by impact

4007,2, 101 9305, 310328, B41J 2295, H01L 4104

Patent

active

049765531

ABSTRACT:
A very small displacement enlargement mechanism is disclosed, in which a first stationary frame and a second movable frame are disposed on the opposite sides of a piezoelectric element for producing a strain in a longitudinal direction according to an applied voltage. A movable member consisting of a plurality of elements linked together into a substantially parallelogrammic form is disposed between the two frames such as to surround the piezoelectric element. An element of the movable member or the side of the first frame is united integrally to the first frame, and another element which is on the side of the second frame and faces the first-mentioned element is united integrally to the second frame. The strain of the piezoelectric element produces a relative displacement of the two frames via the movable member, and the relative displacement is transmitted as an enlarged output to a drive wire. A printing head has a plurality of radially spaced-apart mounting grooves, and a printing unit having the above construction is mounted in each of the mounting grooves.

REFERENCES:
patent: 3614486 (1971-10-01), Smiley
patent: 4407591 (1983-10-01), Adamoli
patent: 4518887 (1985-05-01), Yano
patent: 4547086 (1985-10-01), Matsumoto
patent: 4589786 (1986-08-01), Fukui et al.
patent: 4622484 (1986-11-01), Okihara
patent: 4633118 (1986-12-01), Kosugi
patent: 4644213 (1987-02-01), Shibuya
patent: 4647808 (1987-03-01), Shibuya
patent: 4706230 (1987-11-01), Inoue
patent: 4783610 (1988-11-01), Asano

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