JPS6213631U

JPS6213631U -

Info

Publication number: JPS6213631U
Application number: JP10541685U
Authority: JP
Priority date: 1985-07-10
Filing date: 1985-07-10
Publication date: 1987-01-27

Description

[Brief explanation of the drawing]

第１図は本考案になるサーマルヘツド加圧機構
の一実施例を説明するための概略構成図、第２図
は第１図に示すロータリーソレノイドの回転角度
―トルク特性を動作周期に対応させつつ示す図、
第３図は着力点、アーム部材の回動中心、回動部
材の回動中心が一直線上に存在しないサーマルヘ
ツド加圧機構を説明するための概略構成図、第４
図は第３図に示すサーマルヘツド加圧機構におい
て各点に働く力を示すベクトル図、第５図は第１
図に示すサーマルヘツド加圧機構において各点に
働く力を示すベクトル図、第６図は従来のサーマ
ルヘツド加圧機構の一例を説明するための概略構
成図である。７……サーマルヘツド加圧機構、８……ロータ
リーソレノイド、８ａ……回動軸、９……回動部
材、１０……サーマルヘツド、１１……アーム部
材、１２……プラテン、１３……支軸。 Fig. 1 is a schematic configuration diagram for explaining one embodiment of the thermal head pressurizing mechanism according to the present invention, and Fig. 2 shows the rotation angle-torque characteristics of the rotary solenoid shown in Fig. 1 corresponding to the operating cycle. diagram showing,
Figure 3 is a schematic configuration diagram for explaining a thermal head pressurizing mechanism in which the force application point, the rotation center of the arm member, and the rotation center of the rotation member are not in a straight line;
The figure is a vector diagram showing the force acting on each point in the thermal head pressurizing mechanism shown in Figure 3, and Figure 5 is a vector diagram showing the force acting on each point in the thermal head pressurizing mechanism shown in Figure 3.
FIG. 6 is a vector diagram showing the forces acting on each point in the thermal head pressurizing mechanism shown in the figure. FIG. 6 is a schematic configuration diagram for explaining an example of a conventional thermal head pressurizing mechanism. 7... Thermal head pressurizing mechanism, 8... Rotary solenoid, 8a... Rotating shaft, 9... Rotating member, 10... Thermal head, 11... Arm member, 12... Platen, 13... Support shaft.

Claims

[Claims for Utility Model Registration] (1) A thermal printer having an arm member to which a thermal head is attached and rotates when pressed by a rotating member to bring the thermal head into contact with a platen to which printing paper is attached. A head pressurizing mechanism,
The rotation center of the arm member is provided on the tangential extension line of the platen at the point of contact between the thermal head and the platen, and when the thermal head is in contact with the platen, the rotation center and the rotation member are in contact with each other. A thermal head pressurizing mechanism arranged such that a point of force of the rotating member on the arm member is located on a straight line connecting the center of the rotating shaft. (2) The distance between the center of rotation of the lever member and the point of application of force is selected to be larger than the distance between the center of rotation of the lever member and the contact point. The thermal head pressurizing mechanism according to item 1.