JPH04132959U - thermal head - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a thermal head with a compact external shape. [Structure] On the drive element logic connection terminal pattern 13 of the thermal head substrate 1 on which the heating resistor 3, drive element 5, drive element logic connection terminal pattern 13, etc. are formed,
Connect flat cables directly using anisotropic conductive adhesive, etc. [Effect] Since a unique flexible substrate is not required, the external shape is compact and manufacturing is easy.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to a thermal head.

0002

[Conventional technology]

FIG. 2 shows a conventional thermal head. 1 is a thermal head substrate bonded to a heat sink 4, which is made of ceramic as a matrix. A heating resistor 3, a common electrode (not shown), and individual electrodes (not shown) are mounted on an insulating substrate 2. , drive element connection terminals (not shown) are formed, and the drive elements 5 are arranged in a row. Said The edge of the flexible substrate 6 is placed over the connection terminal. This flexible group Conductive patterns (not shown) are formed on the plate 6 to be respectively connected to the connection terminals. has been done. Further, the flexible substrate 6 is reinforced by a reinforcing plate 7, and this The strong plate 7 is used to connect the conductor pattern formed on the flexible substrate 6 to the outside. A connector 8 is attached.

0003 However, the structure of the conventional thermal head is limited to the unique structure of the flexible substrate 6. There are problems such as increased circuit wiring area, larger external dimensions, etc. do.

0004

[Problem that the idea aims to solve]

A compact thermal head is provided without the need for the above-mentioned unique flexible substrate. It is in.

[0005]

[Means to solve the problem]

The present invention omits the flexible substrate 6 and uses a flexible flat cable. Do not connect a flat cable such as a cable directly to the connection terminal without attaching a connector. This is a characteristic feature.

[0006]

【Example】

An embodiment of the present invention will be described below based on FIG. 1A is a perspective view of the thermal head of the present invention, and FIG. 1B is a perspective view of the thermal head of the present invention. A conductor pattern that connects drive elements formed on an insulating substrate that constitutes a substrate. An example is shown. In FIG. 1, an insulating base that constitutes a thermal head board 1 is bonded to a heat sink 4. A conductive pattern connecting the drive elements 5 that drive the heat generating resistor 3 is provided on the plate 2, which will be described later. The conductor pattern is formed into a pattern as shown in FIG. Serially connect the card-shaped cable 9 to the drive element logic system conductor pattern formed in the center. Connect by pressure welding with con rubber, soldering, conductive anisotropic adhesive tape, etc.

[0007] The conductive pattern connecting the driving elements 5 formed on the insulating substrate 2 is shown in FIG. 1 below. This will be explained using an example shown in B. In FIG. 1B, 10 indicates a heating resistor 3 formed on the outer periphery of the insulating substrate 2. This is a common electrode pattern. and a side 11 to which the card-like cable 9 is connected. A ground wiring is provided adjacent to the common electrode pattern 10 and its common terminal 10a. A pattern 12 and a ground terminal 12a are formed, and a connection terminal for the drive element logic system is formed. A required number of patterns 13 are formed so as to be located between the ground terminals 12a. Incidentally, if necessary, a ground terminal may be included in the connection terminal pattern 13.

[0008] A plurality of conductors are provided between the insulating films in the connection terminal pattern 13 of the driving element logic system. Flexible flat cable (FFC) with layers, conductor coated with insulation Connect the card-like cable 9, such as a ribbon cable, as described above, and connect it to the drive element 5. Gives necessary signals such as lock and strobe.

[0009]

[Effect of the idea]

This invention does not use flexible boards or connectors, so the fixed part is small. It is possible to provide a thermal head that has a compact external shape and is easy to assemble. can.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a thermal head of the present invention and a diagram showing a conductive pattern.

FIG. 2 is a perspective view of a conventional thermal head.

[Explanation of symbols]

1. Thermal head board 3. Heating resistor 5.
Drive element 12...Flat cable

Claims (1)

[Scope of utility model registration request] 1. A flat cable is connected to the connecting terminal of a thermal head substrate in which a heating resistor, a driving element for controlling the heating resistor, a connecting terminal for the driving element, etc. are formed on an insulating substrate. thermal head.