Thermal printer

Abstract

The present invention provides a thermal printer that can prevent a head supporting portion for supporting a thermal head from being curved due to thermal stress during heating to obtain a good recording result and reduce the manufacturing costs and the thickness thereof. A thermal printer (1) includes: a thermal head (3) that has heating elements (3b) arranged on a head substrate (3a) in a longitudinal direction thereof; a head supporting member (4) that has a head supporting portion (5), which is a rectangular plate, for supporting the thermal head (3) at a leading end, and pivots on a rotating axis that is provided at a rear end to contact or separate the thermal head (3) with or from a platen; and a plurality of rectangular opening portions (20) that are provided in a surface of the head supporting portion (5) in the longitudinal direction so as to extend in a direction orthogonal to the longitudinal direction. In the thermal printer, the thermal head (3) is directly fixed to the head supporting portion (5).

Description

technical field [0001] The present invention relates to a thermal printer capable of selectively generating heat from a heating element of a thermal head for information recording, and in particular to a member capable of reducing the bonding portion due to the thermal head side and a head supporting member for supporting the thermal head. The structure of thermal printer that can realize the thinning of the structure around the thermal head and the reduction of the number of parts due to the amount of warpage of the thermal head caused by the difference in physical properties of the bonding parts. Background technique [0002] Conventionally, a thermal printer that records information on a recording medium by selectively driving a plurality of heating elements arranged on a thermal head to generate heat according to recording information has been put into practical use ( For example, Patent Document 1). [0003] Here, a conventional thermal printer 1 will be described with...

AI Technical Summary

Problems solved by technology

This is because if the coefficient of thermal expansion is high, the amount of warpage of the thermal head 3 increases, and it cannot be in contact with the recording medium during printing, so a good recording result cannot be obtained, and if the thermal diffusivity is low, the heat during energization will be absorbed in the heating element 3b. As a result, the ink in the ink cartridge is excessively transferred, resulting in the inability to successfully peel off the ink cartridge and the recording medium, or the excess ink adheres to the recording medium and becomes a stain, etc., and cannot obtain a good recording effect

[0024] In addition, as a countermeasure against the warpage problem, it is also considered to be equipped with a mechanism for adjusting the amount of warpage like the thermal printer described above. mechanism, but a mechanism aimed at the movement stability of the ink cartridge, considering that it is difficult to adjust the thermal stress, and the structure of the thermal printer becomes complicated, which may hinder the purpose of thinning the surrounding area of ​​the thermal head.

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