JPH036434Y2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Technical Field This invention relates to a press-contact cover for a thermal head that presses an elastic body for connecting the electrodes of the thermal head and the electrodes of a flexible cable.

(b) Prior Art As shown in FIG. 2, the thermal head is equipped with a press-contact cover 3 to protect wiring and the like other than the heating resistor array 2 on the substrate 1. This press-contact cover 3 consists of a rigid cover 4 and an elastic plate cover 5. The rigid cover 4 is made of a thick stainless steel plate formed into an L-shaped cross section, and is fixed to the heat dissipation plate 7 with screws 8 so as to cover the flexible cable 6. The elastic plate cover 5 is a thin stainless steel plate that has a suitable degree of elasticity, and has one end overlapped with the inner surface of the end portion of the rigid cover 4 and fixed by spot welding, and the other end is brought into contact with the substrate 1. As a result, the wiring portions on the substrate 1 except for the heating resistor array 2 portion are covered. Moreover, this press-contact cover 3 also plays the role of press-contacting the electrodes by pressing the electrodes on the substrate 1 and the electrodes of the flexible cable 6 together from above through the elastic body 9. This elastic body 9 is an elongated plate made of silicone rubber or the like, and is temporarily fixed with an adhesive to the lower surface of one end of the elastic plate cover 5 fixed to the inner surface of the end of the rigid cover 4, and by tightening the screw 8. The electrode is pressed by its elastic force.

However, in the conventional press-contact cover 3 of the thermal head, the elastic body 9 was simply temporarily fixed to the lower surface of one end of the elastic plate cover 5 and pressed as it was, so this is particularly difficult for line-type thermal heads. If the length of the elastic body 9 is extremely long, there is a risk that it will shift during the assembly process, resulting in poor contact, which has been an obstacle to improving the yield in manufacturing thermal heads.

(c) Purpose of the invention This invention was created in view of the above circumstances, and by bending one end side of the elastic plate cover, the elastic body is supported by this bent part and can be easily displaced. Never-before-seen thermal
The purpose of the present invention is to provide a pressure contact cover for a head.

(d) Structure and effects of the invention The pressure contact cover of the thermal head of this invention is
A rigid cover is attached to the upper surface of the heat dissipation plate of the thermal head so as to cover the flexible cable located on the upper surface of the heat dissipation plate, and one end is attached to the inner surface of the end of the rigid cover located on the electrode of the flexible cable. It consists of an elastic plate cover whose upper surface is fixed to cover the wiring part except for the heating resistor array part on the board, and an electrode on the board and an electrode of the flexible cable are arranged below the one end side of the elastic board cover. Placing an elastic body to press the
The press-contact cover for the head is characterized in that a side of the one end side of the elastic plate cover is bent to provide a bent portion that comes into contact with a side surface of the elastic body.

When the press-contact cover of the thermal head of this invention is configured as described above, the elastic body is supported by the bent portion when attaching the press-contact cover to the thermal head, so that it will not be accidentally shifted. The electrodes on the substrate and the electrodes of the flexible cable can be reliably connected.
Therefore, poor connection of the electrodes is reduced, and the yield of products can be improved.

(e) Example of implementation Figure 1 shows a thermal example of an example of this invention.
FIG. 3 is a side view of the head.

The pressure contact cover of the thermal head of this embodiment is constructed by providing a bent portion 10 on the elastic plate cover 5 of the pressure contact cover 3. The bent portion 10 is formed by bending the end of one end of the elastic plate cover 5 on which the elastic body 9 is temporarily fixed at a substantially right angle downward, and supports the elastic body 9 along the sides in the longitudinal direction. It's becoming like that.

When the press-contact cover of the thermal head of this embodiment is configured as described above, the bent portion 10 supports the side of the elastic body 9 which is temporarily fixed below one end of the elastic plate cover 5, so that the bending portion 10 supports the side of the elastic body 9 which is temporarily fixed below one end side of the elastic plate cover 5. There is no possibility that the elastic body 9 will be inadvertently shifted. Therefore, since the elastic body 9 can reliably press the electrodes together, poor connection of the electrodes will be reduced, and an improvement in product yield can be expected. Further, since the bent portion 10 is formed at the same time as the pressing of the elastic plate cover 5, the yield can be improved without increasing the number of work steps, and this can contribute to reducing the cost of the product.

In the embodiment, the bent portion 10 is provided on the end side of one end of the elastic plate cover 5, but it may be provided on the opposite side with the temporarily fixed elastic body 9 interposed therebetween, or it may be provided on both sides. The elastic body 9 can be supported more reliably.

[Brief explanation of the drawing]

Figure 1 shows a thermal
Side View of Head FIG. 2 is a side view of a conventional thermal head. 1...Substrate, 2...Heating resistor array, 3...
Pressure contact cover, 4... Rigid cover, 5... Elastic plate cover, 6... Flexible cable, 7... Heat sink, 9... Elastic body, 10... Bent portion.

Claims (1)

[Claims for Utility Model Registration] A rigid cover attached to the upper surface of the heat sink of the thermal head so as to cover a flexible cable located on the upper surface of the heat sink, and a rigid body located on the electrodes of the flexible cable. an elastic plate cover with the upper surface of one end fixed to the inner surface of the end of the cover to cover the wiring section except for the heating resistor array section on the board; In a press-contact cover for a thermal head in which an elastic body is arranged and pressed for press-contacting the electrode of the elastic plate and the electrode of the flexible cable, the side of the one end side of the elastic plate cover is bent to contact the side of the elastic body. A pressure contact cover for a thermal head characterized by having a section.