JPS64228B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a small-sized printing device, and more specifically, a type belt made of rubber or the like is wrapped around a cylindrical base, and a printing hammer is used to impact the type belt from the inner surface of the type belt. This invention relates to a small printing device that prints on printing paper by protruding type.

1 and 2 illustrate a type wheel and a printing hammer according to an embodiment of the present invention. In the figures, the type wheel CD has a base K formed in a cylindrical shape,
Type belt made of rubber, etc. wrapped around it
Printed parts CA1, CA2, and CA3 are formed on the outer surface of the CB, and printed parts CA1, CA2, and CA are formed on the inner surface of the CB.
Protrusions CT1, CT2, CT3 at positions corresponding to 3
are provided in a protruding manner so as to fit into the holes Kh1, Kh2, and Kh3 of the base K. A plunger (not shown) is disposed within the type wheel CD, and the tip of its movable core serves as a printing hammer H. Further, ink from an ink roller (not shown) is applied to the type portions CA1, CA2, and CA3 of this type belt.

In the above configuration, the type wheel CD is rotated by a motor (not shown), and when the protrusion CT2 etc. and the hammer H face each other directly, the type wheel CD stops.
Due to the leftward protrusion of the hammer H, the protrusion CT2
etc. to press the printed portion CA2 onto printing paper (not shown) and print.

In the conventional structure, when a malfunction occurs, that is, when the hammer H protrudes to the left while the type wheel CD is still rotating, the hammer H fits between the adjacent protrusions CT1 and CT2. Hammer H becomes unable to return. Then,
There were serious defects that even led to the destruction of the hammer H and protrusions CT1, CT2, CT3, etc.

The present invention is designed to prevent abnormalities from occurring in the type wheel and hammer even in such cases. That is, as shown in Fig. 2, if the size of the hammer H, for example, the width lH, is set larger than the interval lC between the adjacent protrusions CT1 and CT2 provided on the inner surface of the type belt CB (lH>lC), the above-mentioned fitting can be achieved. It doesn't happen.
The first two-dot chain line H'' represents the dimensional relationship. FIGS. 3 and 4 explain other embodiments of the present invention, in which the hammer H is used to Commonly used for girders, the width lH' of the hammer H is lH'>lC' from the distance lC' between one protrusion CT2 provided on the inner surface of the type belt and the protrusion CT1' of the adjacent girder. It's summery.

Since the present invention is constructed as described above, even if the hammer H moves while the type wheel CD is rotating, the hammer H will definitely hit somewhere on one of the protrusions and will quickly return to its original position. This eliminates problems caused by mating.

[Brief explanation of drawings]

FIG. 1 is a sectional view of one embodiment of the present invention, FIG. 2 is a view taken from the direction A-A', FIG. It is a diagram seen from the −B′ direction. H...Hammer, CA1, CA2, CA3...Printed portion, CT1, CT2, CT3...Protrusion.

Claims (1)

[Scope of Claims] 1. A printing device comprising a type ring configured by winding a type belt around a base and a printing hammer disposed on the inner surface of the type belt, in which the type belt is made of an elastic material. and a plurality of protrusions are provided on the inner surface thereof corresponding to the plurality of type parts of the type belt, and the width of the printing hammer is larger than the interval between adjacent protrusions in the rotational direction of the type ring. A printing device characterized by large settings. 2. When the printing hammer is commonly used for a plurality of digits in the type part of the type belt, the distance between adjacent protrusions in the rotational direction of the type ring is equal to 2. The printing device according to claim 1, wherein the printing device is set to have a spacing between the two parts.