Printing head of wire-dot impact printer
US5292201A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 16, 1992 |
| Grant date | Mar 8, 1994 |
| Priority date | — |
| Expiry date | Nov 16, 2012 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2/295
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A printing head including a plurality of impact printing wires constituting a dot matrix and a plurality of actuators for respectively and selectively driving the printing wires. Each actuator is constituted of a movable member to which the printing wire corresponding thereto is connected, a base member, a piezoelectric device mounted on the base member, and first and second leaf springs. The first leaf spring is connected between the movable member and the piezoelectric device, and the second leaf spring is connected between the movable member and the base member in parallel relationship to the first leaf spring. Each of the first and second leaf springs has a shape such that it is narrowest at the central portion thereof and is gradually widened toward the opposite ends thereof. Owing to this shape, a stress generating at the opposite ends of each leaf spring can be reduced to thereby prevent breakage of each leaf spring.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.