Matrix print head, in particular serial matrix pin print head

A matrix print head, in particular a serial matrix pin print head, comprising

• a print pin drive casing frame having a middle area;
• a magnet yoke having a first magnet yoke arm and having a second magnet yoke arm and attached to the print pin drive casing;
• a hinge pin support disposed at the magnet yoke in the center relative to a magnet yoke thickness measured perpendicular to a U-configuration of the magnet yoke, and said hinge pin support located near a corner of the U-configuration;
• an electromagnetic coil disposed on the first magnet yoke arm of the magnet yoke;
• a hinge pin having a hinge pin axis disposed in the hinge pin support and wherein the hinge pin axis is disposed near a corner of the U-configuration of the magnet yoke, wherein the hinge pin axis is disposed on an outer side of the second magnet yoke arm at a level below an end face of the first magnet yoke arm as seen when the magnet yoke arms are directed upwardly;
• an armature associated with the magnet yoke and including a pin driving arm, wherein the pin driving arm of the armature is pivotably hinged around the hinge pin;
• a stop for providing a rest position for the armature;
• a spring pressing the armature against the stop based on an elastic force of the spring such that an operating air gap is present between the armature and a front face of a magnet yoke arm;
• an impact pin attached with a first end to the armature and disposed with a second end at a print pin stroke distance opposite to an imprint-receiving substrate such that an ink ribbon is disposed between the impact pin and the imprint-receiving substrate;
• a print pin guide casing attached to the print pin drive casing frame for guiding the impact pin.

A matrix print head, in particular a serial matrix pin print head,

• where the print head is disposed at a pin stroke distance (1) opposite to a substrate support (2), where an imprint-receiving substrate (3) is resting on the substrate support (2), and where an ink ribbon (6) is guided in front of the substrate support (2), wherein a print pin guide casing (7) and a print pin drive casing (9) are provided on the side of the ink ribbon opposite to the substrate support, wherein an electromagnetic drive (12) is coordinated to each impact pin (4) in the print pin drive casing (9), where the electromagnetic drive (12) comprises a magnet yoke (13), where an electromagnetic coil (14) is disposed on a magnet yoke arm (13a) of the magnet yoke (13), and wherein the electromagnetic drive (12) further comprises an armature (15), which armature (15) is pivotably hinged around a pin bearing (16) and wherein the pin bearing is disposed near a corner of a U-configuration of the magnet yoke (13), wherein the pin bearing is disposed on an outer side of a second magnet yoke arm at a level below an end face of the magnet yoke arm associated with the electromagnetic coil (14) as seen when the magnet yoke arms are directed upwardly, and which armature (15) rests in a rearward position against a stop (18) based on a spring (17), and wherein an operating air gap (20) is formed between the armature (15) and a magnet yoke arm front face (19), wherein a recess (22) is disposed in the center relative to a magnet yoke thickness (21) perpendicular to the U-configuration of the magnet yoke (13), wherein a pin driving arm (15a) of the armature (15) is pivotably submerged in the recess (22) around a hinge pin (23), wherein a hinge pin axis (23a) runs laterally relative to a region of a magnet yoke arm center (24) that is in the region of the magnet yoke side face (25) of the magnet yoke arm (13a, 13b).