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Dual Cancel Coil Structure of Bobbin Assembly

IP.com Disclosure Number: IPCOM000118392D
Original Publication Date: 1997-Jan-01
Included in the Prior Art Database: 2005-Apr-01
Document File: 2 page(s) / 50K

Publishing Venue

IBM

Related People

Hikai, S: AUTHOR [+3]

Abstract

Disclosed is a structure of a coil for a print head. This coil enables the print head to have high print speed, low power consumption and high print quality. Furthermore, the low cost coil contributes to the assembly of the print head.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 69% of the total text.

Dual Cancel Coil Structure of Bobbin Assembly

      Disclosed is a structure of a coil for a print head.  This coil
enables the print head to have high print speed, low power
consumption and high print quality.  Furthermore, the low cost coil
contributes to the assembly of the print head.

      Fig. 1 shows an original coil and a magnetic circuit assembly
of a print head.  This magnetic circuit assembly consists of three
parts:  a permanent magnet, a yoke and two stators.  This original
coil is assembled around the permanent magnet and this coil structure
is characterized by cancelling the magnetic flux directly.
Therefore, high inductance increases power consumption and lowers the
cancelling effect.

      As seen in Fig. 2, this dual cancel coil structure is separated
into two bodies.  Each body assembles around the stator in different
levels.  Also, the winding direction of each body is in opposite
directions so that cancelling flux of each body is added.

This coil has the following advantages:
  1.  High printing speed.
  2.  Low power consumption.
  3.  High print quality.
  4.  Low cost.

The reason for the above advantages follow:
  1.  This coil is assembled around the stator.  It decreases
       inductance value.  As the drive current rises rapidly,
       the armature moves faster than the original coil.  It
       is possible to cut down loss time for needed printing
       time.  Therefore, printing is sp...