摘要:
La tête d'imprimante par points décrite comprend un logement (20) destiné à recevoir plusieurs fils d'impression mobiles longitudinalement (26) et plusieurs armatures (28) mues par des électro-aimants (34, 36), afin de déplacer les fils d'impression (26) vers l'avant depuis une position de non impression vers une position d'impression. Les armatures (28) sont soutenues pivotantes sur un support à pivot (240) et sont disposées entre les électro-aimants associés et une bride de retenue. Les armatures (28) sont reliées fixes aux fils d'impression pour former des sous-assemblages de fils d'impression et d'armatures à combinaisons individuelles, qui sont actionnables selon un mode non balistique de façon à réduire le nombre de composants et en faciliter ainsi la réparation ou le remplacement. Le fil (26) entre en contact avec le papier avant que l'armature se place totalement en prise sur la surface d'extrémité de pôle (78), afin de créer une force par rebondissement.
摘要:
A dot matrix wire print head assembly for mounting on a printer mechanism including a plurality of wire print members, an elongated housing for supporting said wire print members, a plurality of circumferentially spaced radially extending armatures arranged each to drive a wire print member, magnetic pole for selectively causing pivotal movement of the associated armatures electrically energizable coils operably associated with one of a plurality of circumferentially spaced electrical connectors mounted in said magnetic pole means and extending axially through said magnetic pole means toward drive end portions of said wire print members and having plug-in terminal portions for plug-in connection to a printed circuit board associated with the electrical control circuitry of the printer mechanism, and a retainer cover mounted on said housing.
摘要:
A matrix head wire print position shift apparatus which includes a plurality of longitudinally movable print wires (42) which are disposed in guides (56, 60, 64). One of the guides (64) supports the printing ends of the wires (62) and is transversely shiftable between a first print position and a second print position by a shiftable support (68). In the first print position the print wires are selectably operable to print characters defined by a first set of adjacent substantially tangential circularly shaped dots. In the second print position the wire print devices are selectably operable to enhance printing of the characters with a second set of overlapping dots which are offset by one-half dot space from the first set. The shifting device (70, 94, 110) is located within the print wire housing (10).
摘要:
The print wires (16) are operably supported in one-piece bearing and guide passage block member (10) in an elongated wire housing with wire actuating armature members (18) arranged in a circular array between radially innermost (45) and outermost (48) poles of electromagnetic armature actuating devices (23, 24) and an armature retaining cover member (29) centrally adjustably connected to the wire housing and having armature confining slots (40,41) holding the armatures in pivotally displaceable operable association with the poles, the armatures being pivotally supported on the radially outermost edge surfaces of the outermost poles with or without resilient biasing devices continuously holding the armatures in engagement with the pole pivot surfaces without applying a moment of force and peripheral portions of the cover member being mounted in rigid abutting engagement with end surfaces of the outermost poles.
摘要:
A matrix head wire print position shift apparatus which includes a plurality of longitudinally movable print wires (42) which are disposed in guides (56, 60, 64). One of the guides (64) supports the printing ends of the wires (62) and is transversely shiftable between a first print position and a second print position by a shiftable support (68). In the first print position the print wires are selectably operable to print characters defined by a first set of adjacent substantially tangential circularly shaped dots. In the second print position the wire print devices are selectably operable to enhance printing of the characters with a second set of overlapping dots which are offset by one-half dot space from the first set. The shifting device (70, 94, 110) is located within the print wire housing (10).
摘要:
A matrix print head including a housing (20) accommodating a plurality of longitudinally displaceable print wires (26) and a plurality of armatures (28) driveable by electromagnets (34, 36) to displace the print wires (26) forwardly from a non-print to a print position. The armatures (28) are pivotally supported on a pivot support (240) and are positioned between the associated electromagnets and a retaining flange. The armature members (28) are fixedly connected to the print wire members (26) to provide individual combination print wire and armature subassemblies operable in a non-ballistic mode to reduce the number of parts and facilitate repair or replacement. The wire (26) impacts the paper before the armature fully engages on the pole end surface (78) to create a rebound force.
摘要:
A matrix print head including a housing (20) accommodating a plurality of longitudinally displaceable print wires (26) and a plurality of armatures (28) driveable by electromagnets (34, 36) to displace the print wires (26) forwardly from a non-print to a print position. The armatures (28) are pivotally supported on a pivot support (240) and are positioned between the associated electromagnets and a retaining flange. The armature members (28) are fixedly connected to the print wire members (26) to provide individual combination print wire and armature subassemblies operable in a non-ballistic mode to reduce the number of parts and facilitate repair or replacement. The wire (26) impacts the paper before the armature fully engages on the pole end surface (78) to create a rebound force.
摘要:
A dot matrix wire print head assembly for mounting on a printer mechanism including a plurality of wire print members, an elongated housing for supporting said wire print members, a plurality of circumferentially spaced radially extending armatures arranged each to drive a wire print member, magnetic pole for selectively causing pivotal movement of the associated armatures electrically energizable coils operably associated with one of a plurality of circumferentially spaced electrical connectors mounted in said magnetic pole means and extending axially through said magnetic pole means toward drive end portions of said wire print members and having plug-in terminal portions for plug-in connection to a printed circuit board associated with the electrical control circuitry of the printer mechanism, and a retainer cover mounted on said housing.