Thermal head
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsYasushi Okamura, Kiichirou Tanaka, Hideo Fujino
Life of this patent
Estimating the term…
Abstract
A thermal ceramic head chip (1) having plural heating elements (2) and a connecting portion (5) and held on a head base (10) and a folded flexible printed circuit sheet (3) having an external lead portion (4) on its outside face, the wiring conductors on the flexible printed circuit sheet (3) is connected to the connecting portion (5). At the former's connecting opening disposed on the inside face of the former, and the flexible printed circuit sheet (3) with a dew sensor gap (13) for electrical detection of dew if any.
Claims13
A thermal head assembly comprising:
- a head base having a shape of wider under part and a narrow upper part;
- a head chip located on said upper part of said head base having a first connecting portion;
- a plurality of heating elements fixed on said head chip;
- a folded flexible printed circuit sheet having a second connecting portion disposed on an inside face of said folded flexible printed circuit sheet for connection to said first connecting portion, said printed sheet having an aperture for insertion of said narrow upper part of said head base therethrough;
- and
- external connecting terminals disposed on an outside face of said folded flexible printed sheet.
A thermal head comprising:
- a head chip having a first connecting portion,
- a plurality of heating elements fixed on said head chip,
- a head base for holding said head chip and having a shape of wider under part and narrow part,
- said heating elements being disposed on said upper part,
- a folded flexible printed circuit sheet having a second connecting portion disposed on an inside face of said folded flexible printed circuit sheet for connection to said first connecting portion,
- said folded flexible printed circuit sheet being bonded to both surfaces of said head base and having an aperture for insertion of said narrow upper part of said head base therethrough, and
- external connecting terminals disposed on an outside face of said folded flexible printed sheet.
A thermal head assembly comprising:
- a head base, including an upper part and a lower part, said upper part being of a narrower width than said lower part, comprising:
- (a) a head chip residing on said upper part and at least part of said lower part;
- (b) a plurality of heating elements located on an upper portion of said head chip;
- and
- (c) first connector means located on said head chip for connecting to a mating connector;
- and
- a printed circuit sheet of a generally "U" shape and containing a slot through which said upper part of said head base is designed to protrude, comprising:
- (a) second connector means for mating with said first connector means of said head base;
- and
- (b) a plurality of external terminal means for electrically connecting to said thermal head assembly.
Dependencies are inferred from the claim text.