JPS62292452A - Thermal head - Google Patents

Abstract

PURPOSE:To eliminate inconveniences such as the unevenness of printing record density or the like and to achieve the standardization of components by applying the same bracket, by inserting a spacer between a heat sink and the bracket at least on one side. CONSTITUTION:The spacer equipped with apertures 5 provided corresponding to a projecting pin 2 and a screw hole 3, for instance a bakelite plate is set on this heat sink and then, the reference hole 1 of a bracket 8 is accurately inserted into the projecting pin 2 of the heat sink. Then, the screw is inserted into the screw hole 3 provided on the radiation shield via the aperture 7 provided on the bracket 8 and the aperture 5 provided on the spacer 3, and the bracket and the spacer are fixed to the heat sink. When the unevenness of printing record density occurs in a thermal recorder, one side of this spacer 4 is removed on the heat sink, or otherwise the spacer on the heat sink is exchanged for other space of a different thickness. Further, when the kind of the thermal recorder is different, the cheap cost spacer is changed for that of a suitable thickness without changing the bracket.

Description

[Detailed Description of the Invention] 3. Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a thermal head, and in particular to a thermal head, in which a heat dissipation plate to which a thermal board is attached is attached to a thermal recording device, such as a facsimile device. The present invention relates to a thermal head equipped with a pair of brackets, and more particularly to a thermal head holding system that facilitates adjustment once printing is performed.

[Conventional technology]

Conventionally, thermal heads with this ridge holding method have a bracket with reference holes in at least a pair of protruding bins (thermal head heating element positioning bins) provided near both ends of the heat sink of the thermal head. (or metal fittings) are directly inserted and fixed, and this bracket is attached to the frame of the thermal recording device. Alternatively, in contrast to the above method, a protruding pin (reference pin) is inserted into at least one pair of holes provided in the heat sink. The method used was to directly insert and secure a bracket provided with a bracket, and then attach this bracket to the frame of the device.

[Problem that the invention seeks to solve]

In the conventional holding type thermal head mentioned above,
Even if the structure of the thermal head is the same, every time the structure of the thermal recording device changes, it is rarely necessary to change the structure of the bracket for reasons such as setting the print recording resistance to an appropriate value.

In addition, even if the thermal recording device is of the same machine type, problems such as uneven printing density may occur in the device due to differences in the mechanical dimensional accuracy of its parts or the tension of the suppression spring applied to the thermal head. In such a case, it would be necessary to replace the parts used in the device.

Therefore, the number of man-hours involved in manufacturing the heat-sensitive recording device is large, or the number of parts that must be managed for each heat-sensitive recording device increases, making the device expensive.

The purpose of the present invention is to solve problems such as uneven printing density in thermal recording devices, and to achieve standardization of parts by applying the same bracket to thermal recording devices. Our goal is to provide the following.

[Means for solving the gap point] The thermal head of the present invention is equipped with at least one pair of brackets for holding a heat sink to which a substrate is attached to a thermal recording device. This is accomplished by inserting a spacer between at least one of the plate and the book.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view schematically showing a sandwich portion according to an embodiment of the present invention. Reference numeral 1 designates a heat dissipation plate of the thermal head, and this heat dissipation plate is provided with screw holes 3 (i-) for fixing a pair of protruding pins 2 and a bracket 8 to the heat dissipation plate, which define the position of the heating element of the thermal head. A spacer 4, for example a Bakelite plate, having a thickness of about 0.2 to 2 mm and having openings 5 provided corresponding to the protruding bottles and screw holes is set on this heat sink, and then the reference hole 6 of the bracket 8 is set. into the protruding pin 2 of the heat sink, and insert the screw into the screw hole 3 provided in the heat sink through the hole 7 provided in the bracket 8 and the hole 5 provided in the spacer 4, and then connect the bracket and spacer. and fix it to the heat sink.

If uneven printing density occurs on the thermal recording device,
One of the spacers 4 is removed from the heat sink, or the spacer on the heat sink is replaced with another spacer of a different thickness. 1. If the model of thermal recording #C camera is different,
To change an inexpensive spacer with one of appropriate thickness without changing a bracket.

By doing this, it is possible to change the tension of the pressure springs applied to the thermal and depressing springs, so that it is possible to adjust the unevenness once printed.

Furthermore, if the bracket opening is made larger than the specified size, the position of the bracket can be adjusted, making it easier to adjust the unevenness of the rocky surface.

〔Effect of the invention〕

As explained above, in the present invention, instead of fixing a pair of brackets directly on the heat sink, if desired, a spacer is inserted into one or both brackets and this bracket is fixed on the heat sink. Or, by inserting a pair of spacer plates with different thicknesses between the thermal plate and the heat dissipation plate, the tension of the suppression spring applied to the thermal plate and the thermal plate can be changed, thereby reducing the unevenness of printed recording in the thermal recording device. Is it possible to solve the problem or standardize parts by applying the same bracket to multiple types of thermal recording devices? It is something to move forward with. Therefore, if a problem such as uneven printing occurs in a thermal recording device, it is possible to eliminate the problem by replacing or inserting an inexpensive spacer without changing expensive parts. Standardization has the effect of speeding up the finishing of multi-ATAL devices.

As long as the present invention exhibits the above effects, it goes without saying that the shape, thickness, identification method, material, etc. of the spacer used in the present invention should not be particularly limited.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a decomposition material schematically showing a narrow portion of an embodiment of the present invention. 1... Heat sink, 2... Protruding bottle of heat sink, 3... Screw hole of heat sink, 4... Spacer, 5... ...Spacer opening, 6...
・Bracket base hole, 7...Bracket hole,
8...Bracket. fist l diagram

Claims (2)

[Claims] (1) In a thermal head equipped with at least a pair of brackets for holding a heat sink to which a thermal head board is attached to a thermal recording device, a spacer is inserted into at least one of the spaces between the heat sink and the bracket. A thermal head characterized by: (2) The thermal head according to claim 1, wherein the pair of spacers inserted between the thermal head heat sink and the pair of brackets have different thicknesses.