JPH01291957A - Thermal transfer type printer head - Google Patents

Abstract

PURPOSE:To enable the direct disposition of heaters on a substrate and thereby to facilitate the preparation of the heaters, by providing heat transfer bodies which are disposed in a glaze layer covering the heaters and which are made of a substance of higher heat conductivity than the glaze layer and paired with the heaters. CONSTITUTION:Heaters 2 are covered with a glaze layer 3 and heat transfer bodies 4 paired with the heaters 2 and having higher heat conductivity than the glaze layer 3 are buried in the glaze layer 3. When a current is made to flow through the heaters 2 to make them generate a heat, the heat generated is propagated to the surface of the glaze layer 3 through the heat transfer bodies 4. By making up the heat transfer bodies 4 of a substance having higher heat conductivity than the glaze layer 3, the heat generated in the heaters 2 is propagated to the heat transfer bodies 4 and further to the surface of the glaze layer 3, that is, the surface of a head, and thereby the ink of an ink ribbon being in contact with the head is melted for printing. Since the heat transfer bodies 4 are so provided as to correspond to the heaters 2 respectively, the heat generated by each heater 2 can be propagated separately. The glaze layer 3 transfer less heat than the heat transfer bodies 4, and therefore the heaters 2 are affected little by the heater 2 adjacent thereto.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a printer, and particularly to a thermal transfer printer head.

[Prior Art] Conventionally, this type of thermal transfer printer head, as shown in FIG. The heating elements 6 are arranged in a horizontal row. The heating element 6 is formed within the glaze layer 7 away from the surface of the substrate 5 in order to efficiently transfer heat to the ink film.

[Problem to be solved by the invention] In the conventional printer head, the heating element 6 is floating in the glaze layer 7, so when forming the glaze layer 7, the glaze layer 7 is formed thinly and the heating element 6 is placed on top of it. Since the heating element 6 is placed and further covered with the glaze layer 7, the heating element 6
It has to be made on a curved surface, requiring advanced manufacturing technology, and has the disadvantage that the heating element is not uniform and the resistance value etc. vary.

An object of the present invention is to provide a thermal transfer printer head that solves the above problems.

[Means for Solving the Problems] In order to achieve the above object, the thermal transfer printer head of the present invention includes a heating element disposed directly on a substrate and a glaze layer disposed within a glaze layer covering the heating element. It is made of a material with higher thermal conductivity than the layer, and has a heat transfer element paired with the heating element.

[Example] Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a sectional view showing a printer head according to an embodiment of the present invention. Heating elements 2.2... are arranged in a horizontal row,
The heating elements 2, 2, . . . are placed directly on the substrate 1. Then, the heating element 2.2... is covered with a glaze layer 3,
A heat transfer body 4, which pairs with the heat generating body 2 and has a higher thermal conductivity than the glaze layer 3, is embedded in the glaze layer 3. heating element 2
When a current is applied to generate heat, the generated heat is transmitted to the surface of the glaze layer 3 through the heat transfer body 4. By configuring the heat transfer body 4 with a material having a higher thermal conductivity than the glaze layer 3, the heat generated by the heating element 2 is transmitted to the heat transfer body 4 and to the surface of the glaze layer 3, that is, the surface of the head. transmitted,
Printing is done by melting the ink on the ink ribbon that is in contact with the head. Since each heating element 2 has a heat transfer element 4 corresponding to the heating element 2, the heat generated by the heating element 2 can be transmitted separately. Since the glaze layer 3 conducts heat less easily than the heat transfer body 4, the influence of heat between the adjacent heat generating bodies 2 is small.

[Effects of the Invention] As explained above, the present invention allows the heating element to be separated from the head surface by transmitting the heat generated by the heating element to the head surface through the heat transfer element, and allows the heating element to be placed directly on the substrate. can be placed. Therefore, the heating element can be easily manufactured, and the resistance value etc. of the heating element can be made uniform.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a thermal transfer printer head of the present invention, and FIG. 2 is a sectional view showing a conventional thermal transfer printer head.

Claims (1)

[Claims] (1) A heating element disposed directly on the substrate, and a heat transfer element disposed within a glaze layer covering the heating element and made of a material with higher thermal conductivity than the glaze layer and forming a pair with the heating element. A thermal transfer printer head characterized by having.