JPH02150250U

JPH02150250U -

Info

Publication number: JPH02150250U
Application number: JP5931289U
Authority: JP
Priority date: 1989-05-22
Filing date: 1989-05-22
Publication date: 1990-12-25

Description

[Brief explanation of drawings]

第１図は一実施例における発熱基板を示す部分
平面図、第２図は一実施例のサーマルヘツドを示
す概略平面図、第３図は一実施例のサーマルヘツ
ドに被記録媒体を押しつけた状態を示す部分断面
図、第４図、第５図、第６図及び第７図はそれぞ
れ一実施例を示す発熱基板端部の断面図、第８図
は一実施例の面取り加工方法を示す工程断面図、
第９図は他の実施例の面取り加工方法を示す工程
断面図、第１０図は提案中の端部型サーマルヘツ
ドと被記録媒体との接触状態を示す側面図、第１
１図は端部型サーマルヘツドと被記録媒体との接
触部分の詳細を示す断面図である。２……被記録媒体、１０……発熱基板、１０ａ
……セラミツク基板、１０ｂ……グレーズ層、１
２……発熱体、１６……共通電極、１８……個別
電極、３４……保護膜、３６，３８，４０，４２
……面取り面。 FIG. 1 is a partial plan view showing a heat generating substrate in one embodiment, FIG. 2 is a schematic plan view showing a thermal head in one embodiment, and FIG. 3 is a state in which a recording medium is pressed against the thermal head in one embodiment. FIG. 4, FIG. 5, FIG. 6, and FIG. 7 are each a cross-sectional view of the end of a heat generating board showing one embodiment, and FIG. 8 is a step showing a chamfering method of one embodiment. cross section,
FIG. 9 is a process cross-sectional view showing the chamfering method of another embodiment, FIG. 10 is a side view showing the state of contact between the proposed end-type thermal head and the recording medium, and FIG.
FIG. 1 is a sectional view showing details of the contact portion between the end-type thermal head and the recording medium. 2... Recording medium, 10... Heat generating board, 10a
... Ceramic substrate, 10b ... Glaze layer, 1
2... Heating element, 16... Common electrode, 18... Individual electrode, 34... Protective film, 36, 38, 40, 42
... Chamfered surface.

Claims

[Scope of utility model registration request]

Heat generating elements are arranged at one end of one main surface of the substrate close to the end of the substrate, and both individual electrodes and a common electrode of each heat generating element extend on the main surface in a direction opposite to the end, The end of the substrate on the main surface side of the end portion is chamfered, and at least on the end side, the chamfered portion, the heating element, the individual electrodes, and the common electrode are covered with a wear-resistant protective film, and the recording target A thermal head in which printing is performed by contacting the medium at an angle less than perpendicular to the main surface.