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US 4,767,227 AGranted
Print wire driving device for wire type dot printer
AssigneeSeiko Epson Corporation
InventorsAkio Mitsuishi, Yasuhiko Nakazawa, Takumi Sato
Life of this patent
Estimating the term…
Abstract
A print wire driving device for a wire dot printer includes a plate like member having slots therein. The slots are arranged opposite the cores of a magnetic core block. The cores are arranged in a circle and project from the core block. The slots extend radially from the center of the plate like member. A magnetic driving member is received in each slot so that it pivots therein when acted upon by the magnetic field of a respective magnetic core. A print wire is coupled to each magnetic driving member. Each print wire is guided by a wire guide having a wire nose which receives at its end a wire guide member from which the ends of the print wires extend to print.
Claims42
A print wire driving apparatus for a wire dot printer comprising:
- a plate-like member, said member having slots therein, said member being positioned so as to extend laterally of a longitudinal axis of said apparatus, said member being formed of a magnetic material;
- magnetic actuation means including a coil and a coil core defining magnetic poles positioned in facing relation to each said slot;
- a driving lever means including at least one magnetic member disposed in each said slot;
- a print wire coupled to each said driving lever means;
- and
- support means, including a first plate like support member and a second plate like support member together holding a portion of both sides of the driving lever means therebetween, for pivotally supporting said driving lever means in said slots, said magnetic actuation means, plate-like member and driving lever means defining at least part of a magnetic circuit when said magnetic actuation means is actuated to pivotally displace said driving lever means to displace said print wire in the direction of the longitudinal axis of the apparatus.
3 more elements
A print wire driving apparatus for a wire dot printer comprising:
- a plate-like member, said member having slots therein, said member being positioned so as to extend laterally of a longitudinal axis of said apparatus, said member being formed of a magnetic material;
- magnetic actuation means including a coil and a coil core defining magnetic poles positioned in facing relation to each said slot;
- a driving lever means including at least one magnetic member disposed in each said slot;
- a print wire coupled to each said driving lever means;
- and
- support means, including a first support member and a second support member together holding a portion of both sides of the driving lever means, for pivotally supporting said driving lever means in said slots, said magnetic actuation means, plate-like member and driving lever means defining at least part of a magnetic circuit when said magnetic actuation means is actuated to pivotally displace said driving lever means to displace said print wire in the direction of the longitudinal axis of the apparatus, and a magnetic core block, the magnetic core block having respective coil cores formed integral therewith, each respective coil being disposed opposite one of said driving lever means, said magnetic coil block having a planar portion supporting said coil cores and an annular rim surrounding said coil cores, said annular rim and said coil cores extending from said planar portion by the same distance, and a magnetic yoke around the rim of said core block with said magnetic yoke to define the gap between said core coil and said at least one magnetic member of said driving lever means, wherein the magnetic yoke is formed from a magnetic material, said magnetic yoke having a planar portion, said planar portion having stop therein corresponding to an registrant with said slots inserts plate-like member, said magnetic yoke slots being demensioned throughout said driving lever means to pivot therein, said magnetic yoke having an annular rim extending perpendicularly to said planar portion thereof by a predetermined distance, said magnetic yoke annular rim of said core block.
3 more elements
A print wire driving apparatus for a wire dot printer comprising:
- a plate-like member, said member having slots therein, said member being positioned so as to extend laterally of a longitudinal axis of said apparatus, said member being formed of a magnetic material;
- magnetic actuation means including a coil and a coil core defining magnetic poles positioned in facing relation to each said slot;
- a driving lever means including at least one magnetic member disposed in each said slot;
- a print wire coupled to each said driving lever means;
- and
- support means, including a first support member and a second support member together holding a portion of both sides of the driving lever means, for pivotally supporting said driving lever means in said slots, said magnetic actuation means, plate-like member and driving lever means defining at least part of a magnetic circuit when said magnetic actuation means is actuated to pivotally displace said driving lever means to displace said print wire in the direction of the longitudinal axis of the apparatus wherein said plate-like member has a groove extending laterally to each said slot and wherein said support means which comprises a shaft for pivoting each driving lever means and extending laterally thereto, each said shaft being received in one said groove, a first holding member disposed on one side of said plate-like member, said shafts being captured in said grooves between parts of said first holding member and parts of said second holding member, said grooves being sized and shaped and said plate-like member being of a sufficient thickness to permit rotation of said shafts in said grooves.
3 more elements
A print wire driving apparatus for a wire dot printer comprising;
- a magnetic core block having a first substantially planar portion, said magnetic core block having a plurality of magnetic cores extending therefrom in a direction perpendicular to said planar portion, said magnetic cores each having a first surface, said core block having a peripheral rim also extending in a direction perpendicular to said first planar portion, said peripheral rim having a second surface, said first surface and said second surface lying in the same plane;
- a support member having slots extending therein, supported on a first side by the second surface of the magnetic core block, each said first surface facing a support member slot;
- a plate-like member, said member having slots extending therein, said plate-like member being supported by said second side of the support member with each said first surface facing a slot, said plate-like member being formed of a magnetic material;
- a magnetic driving lever pivotally mounted in each said slot and including at least one magnetic member in each said slot said magnetic driving lever including a pivot inserted in the slot in the plate-like member and supported by the second surface of the support member;
- and
- the print wire coupled to each said magnetic driving lever for displacement by the pivoting thereof.
3 more elements
A print wire driving apparatus for a wire dot printer comprising;
- a magnetic member formed with a plurality of coil cores projecting therefrom;
- a bobbin surrounding each coil core;
- a second member disposed in facing relationship with said magnetic member, said second member having slots therein, each said slot being positioned so as to be in facing relationship with one said coil core;
- a print wire driving member including at least one magnetic member disposed in each said slot pivotally mounted in each of said slots;
- alignment means projecting from each said bobbin and extending into a corresponding slot to assist in aligning said driving member with respect to said magnetic member and said second member;
- and
- a print wire coupled to each said driving member.
4 more elements
A print wire driving apparatus for a wire dot printer comprising;
- a magnetic member formed with a plurality of coil cores projecting therefrom;
- a bobbin surrounding each coil core;
- a second member disposed in facing relationship with said magnetic member, said second member having slots therein, each said slot being positioned so as to be in facing relationship with one said coil core;
- a print wire driving member including at least one magnetic member disposed in each said slot pivotally mounted in each of said slots;
- alignment means projecting from each said bobbin and extending into a corresponding slot to assist in aligning said driving member with respect to said magnetic member and said second member;
- and
- a print wire coupled to each said driving member;
- a third member between said magnetic member and said second member, the third member having a dimension which at least in part defines space in between said magnetic member and said second member;
- wherein said magnetic member is a magnetic core block having a first planar portion and a first peripheral rim extending perpendicularly from said first planar portion, and said third member has a second planar portion and a second rim extending perpendicularly from said second planar portion, said first rim being in contact with said second rim.
6 more elements
A print wire driving apparatus for a wire dot printer, comprising:
- a magnetic member formed with a plurality of projecting coil cores;
- a plate-like member disposed in proximate facing relationship to said coil cores, said plate-like member having a slot opposite each said coil core, said plate-like member having a groove intersecting each said slot;
- a print wire driving member, including at least one magnetic member disposed in each said slot, received in each said slot;
- a shaft in each said groove pivotally supporting the associated driving member;
- a first support member positioned on a first side of said plate-like member and a second support member positioned on a second side of said plate-like member, said first and second support members having portions covering said grooves so that said shafts are retained in said grooves;
- and
- a print wire coupled to each of said magnetic driving members.
4 more elements
A print wire driving apparatus for a wire dot printer comprising:
- a core block having a first substantially planar portion, said core block having a plurality of coil cores extending therefrom in a direction perpendicular to said planar portion, said coil cores being arranged in a circular pattern about a center of said planar portion, said core block having a first peripheral rim extending in a direction perpendicular to said first planar portion;
- a yoke, said yoke having a second planar portion and a second rim extending in a direction perpendicular to said second planar portion, said yoke being disposed so that said second rim contacts said first rim, said first rim, said second rim and said coil cores being dimensioned so that said cores have surfaces spaced apart from said second planar portion, said second planar portion having first slots, said first slots each facing one of said coil cores, said first slots extending in a radial direction of said yoke in facing relationship to a corresponding coil core;
- a magnetic driving lever corresponding to each said coil and mounted for pivotable displacement in a slot between first and second positions;
- a print wire coupled to each lever, said print wire moving to a print position as its respective lever is pivoted from said first position to said second position;
- a side yoke, said side yoke having second radial slots therein, said second radial slots being aligned with said first radial slots, said second radial slots being dimensioned so that said levers are pivotable therein, said side yoke having a respective groove extending laterally to each of said second radial slots;
- a shaft mounted in each said groove and supporting a lever for the pivoting thereof;
- coil means mounted on each said coil core for causing said coil cores to be selectively and temporarily magnetized to urge said levers from said first position to said second position;
- and
- biasing means for urging said levers from said second position to said first position when said respective magnetic cores are not magnetized by said electromagnet means.
6 more elements
A print wire driving apparatus for a wire dot printer comprising:
- a plate-like member, said member having slots therein, said member being positioned so as to extend laterally of a longitudinal axis of said apparatus, said member being formed of a magnetic material;
- magnetic actuation means including a coil and coil core defining magnetic poles positioned in facing relation to each said slot;
- a driving lever means formed of a laminated magnetic material disposed in each said slot;
- a print wire coupled to each said driving lever means;
- and
- support means including a first plate-like support member and a second plate-like support member holding a portion of both sides of the driving lever means for pivotally supporting said driving lever means in said slots, said magnetic actuation means, plate-like member and driving lever means defining at least part of a magnetic circuit when said magnetic actuation means is actuated to pivotally displace said driving lever means to displace said print wire in the direction of the longitudinal axis of the apparatus.
3 more elements
Dependencies are inferred from the claim text.