JPH0326567U

JPH0326567U -

Info

Publication number: JPH0326567U
Application number: JP8728489U
Authority: JP
Priority date: 1989-07-24
Filing date: 1989-07-24
Publication date: 1991-03-18

Description

[Brief explanation of drawings]

第１図は本考案のインクリボン利用範囲拡大装
置の一実施例の原理をしめす斜視図、第２図ａ，
ｂ，ｃ，ｄは第１図の揺動の状態をしめす側面図
、第３図は本考案のインクリボン利用範囲拡大装
置によるインクリボン上の印字範囲の推移の一例
をしめす平面図、第４図は従来の技術のインクリ
ボン上の印字範囲の推移の一例をしめす平面図で
ある。１……インクリボン、２……リボンカセツト、
３……リボン送りローラ、４……駆動軸、５……
印字ヘツド、６……揺動の中心、７……揺動軸、
８……プリンタフレーム、９……支持棒、１０…
…偏心ローラ、１１……偏心ローラ駆動軸、１２
……スプリング。 Fig. 1 is a perspective view showing the principle of an embodiment of the ink ribbon usage range expanding device of the present invention, Fig. 2a,
b, c, and d are side views showing the swinging state of Fig. 1; Fig. 3 is a plan view showing an example of the transition of the printing range on the ink ribbon by the ink ribbon usage range expanding device of the present invention; The figure is a plan view showing an example of the transition of the printing range on an ink ribbon according to the prior art. 1... Ink ribbon, 2... Ribbon cassette,
3... Ribbon feed roller, 4... Drive shaft, 5...
Print head, 6... Center of swing, 7... Axis of swing,
8...Printer frame, 9...Support rod, 10...
... Eccentric roller, 11 ... Eccentric roller drive shaft, 12
……spring.

Claims

[Scope of utility model registration request]

In a printer that uses an ink permeation type and circulation type ribbon cassette, the ink on both sides perpendicular to the running direction of the ink ribbon that runs parallel to the drive shaft of the ribbon feed roller of the ribbon cassette toward the print head during printing. On each center line in the ribbon running direction, a central axis of oscillation connecting the centers is located at a point as far as possible from the printing side of the ink ribbon, and the center line in the running direction of the ink ribbon runs with the printing head facing the print head. The center of each swing is set by selecting a position parallel to the center of swing, and the center of swing is set at a desired position on a plane perpendicular to the drive axis of the ribbon feed roller adjacent to a point as far as possible from the center of each swing of the both sides. The ribbon cassette is oscillated around the oscillation center axis connecting the oscillation centers by driving an eccentric roller having the required eccentricity by an eccentric roller drive shaft at a predetermined speed linked to the printing speed. A desired ribbon cassette is attached to the printing head by constantly applying a required pressing force such as a spring in a direction that resists the contact pressure against the ribbon cassette from the contact point of the eccentric roller. An ink ribbon usage range expanding device characterized in that the ink ribbon side of the ink ribbon is reciprocated in a direction perpendicular to the running direction of the ink ribbon.