JPH0929979A - Assembling method of print head - Google Patents

Abstract

PROBLEM TO BE SOLVED: To assemble a print heat without paying special attention to the registering of flexible cable and to the separation of a pasted part by a method wherein electromechanical conversion element is pasted on the flexible cable and cut by every single pitch collectively. SOLUTION: Flexible cable 2 pasted on board 3 and electromechanical conversion element 4 are simultaneously worked. Simultaneously with the working, the land part of common electrode 42 and the land part on positive pole side are cut apart into every individual electromechanical conversion element 4 by grooves 20. Further, by applying electroconducting adhesive 26 to some part of the land part for the common electrode 42 so as to conduct the land parts of the respective common electrodes 42 cut apart by the grooves 20. By applying non-electroconductive adhesive 25 to the land parts o positive pole side, a body 11 is pasted to the board 3. Thus, the flexible cable 2 and the electromechanical conversion element 4 for one line can be formed and a print head can easily be assembled without giving heed to the registering of the flexible cable 2 and to the separation of the pasted part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of assembling an ink jet print head having an electromechanical conversion element.

[0002]

2. Description of the Related Art In a conventional ink jet printer assembling method, a conductive adhesive is used for each electromechanical conversion element to bond the electrode portions of a flexible cable one by one. Further, the electromechanical conversion element and the electrode are connected by wire bonding.

[0003]

In the above method, in addition to poor workability, there are problems such as misalignment of the flexible cable and peeling of the pasting portion.

An object of the present invention is to assemble a print head without worrying about alignment of a flexible cable and peeling off of an attachment part.

[0005]

According to the present invention, when the electromechanical conversion element is cut in every single pitch, the flexible cable is simultaneously processed to form the flexible cable and electromechanical conversion element for one line at a time. To be achieved.

[0006]

According to the above invention, when the electromechanical conversion element is cut at a single pitch, the flexible cable is simultaneously processed at the same time, so that the inefficiency in work can be solved and the problem such as peeling can be eliminated. .

[0007]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view of a print head 1 according to the present invention.

The print head 1 is constructed by attaching a substrate 3 to a body 11. 2 is a flexible cable.

FIG. 2 is a sectional view of FIG.

In the figure, a body 11 comprises a diaphragm 7, an ink chamber 8 and an orifice 10. 9 is an orifice plate. Further, the flexible cable 2 and the laminated electromechanical conversion element 4 are attached to the substrate 3. One end of the electromechanical conversion element 4 is attached to the diaphragm 7.

FIG. 3 is a diagram showing processing of the piezoelectric element 4.

Reference numeral 12 is a working grindstone, and 20 is a groove cut by the working grindstone. Reference numeral 21 is a land portion for the common electrode provided in the flexible cable, 22 is a land portion on the positive electrode side, and 23 is a hole provided in the flexible cable.

FIG. 4 is a top view after the processing of FIG.

Reference numeral 24a is a common electrode terminal, and 24b is a positive electrode terminal.

FIG. 5 is a perspective view (partially sectional view) showing the print head assembly.

Reference numeral 25 is an adhesive (non-conductive), 26 is a conductive adhesive, 41 is a positive electrode of the electromechanical conversion element 4, and 42 is a common electrode of the piezoelectric element.

Next, a method of assembling the print head will be described.

In FIG. 3, the flexible cable 2 attached to the substrate 3 and the electromechanical conversion element 4 are processed at the same time. Simultaneously with processing, the land portion for the common electrode and the land portion on the positive electrode side are formed by the groove 20 into the individual electromechanical transducers 4.
It is divided into each.

A conductive adhesive is applied to a part of the land portion for the common electrode, and the land portion of each common electrode cut by the groove 20 is electrically connected. A non-conductive adhesive (usually an epoxy adhesive) is applied to the land portion 22 on the positive electrode side, and
Attach 1.

As described above, it is a very effective method of assembling the print head, which can perform the work of attaching the flexible cable to the piezo-piezoelectric element one by one in a conventional manner at the same time and reduce the work failure.

[0022]

According to the present invention, a flexible cable and an electromechanical conversion element for one line can be formed by simultaneously processing a flexible cable when cutting the electromechanical conversion element for each single pitch. As a result, the print head can be easily assembled without worrying about the alignment of the flexible cable and peeling off of the attachment part.

[Brief description of drawings]

FIG. 1 is a perspective view of a printhead according to the present invention.

FIG. 2 is a sectional view of FIG.

FIG. 3 is a diagram showing processing of an electromechanical conversion element.

FIG. 4 is a top view after processing of FIG.

FIG. 5 is a perspective view (partially sectional view) showing the printhead assembly.

[Explanation of symbols]

Reference numeral 1 is a print head, 2 is a flexible cable, 3 is a substrate, 4 is an electromechanical conversion element, 11 is a body, and 20 is a groove.

Claims (1)

[Claims] 1. In an ink jet print head for ejecting ink droplets by changing ink volume in an ink chamber by deformation of an electromechanical conversion element, a flexible cable is attached to a substrate, and the electromechanical conversion element is mounted on the flexible cable. A method of assembling a print head, characterized in that after sticking, these are collectively cut for each single pitch.