JPH0529881Y2 - - Google Patents

Description

[Detailed Description of the Invention] <<Industrial Application Field>> The present invention relates to a type belt in a serial printer.

《Prior Art》 Conventionally, the type belt in a serial printer has an endless shape, and a large number of type parts are individually provided along the circumferential direction at a predetermined pitch on the outer circumference, and a number of type parts are provided in the circumferential direction on the inner circumference. A large number of belt teeth are provided at a predetermined pitch along the belt, and the individual type parts and belt teeth are provided in pairs with each other, that is, at the same pitch, and a thin connecting part is provided between the type parts. The structure is such that they are connected to each other.

In addition, each type section is divided into a group containing infrequently printed characters such as special symbols and a group containing frequently printed characters such as numerical symbols on the endless belt circumference. The type part and the belt tooth part were not provided at the boundary between the type groups.

<<Problems to be solved by the invention>> However, as shown in the schematic diagram of the main part of a conventional example in FIG. The type part 2 is attached to a connecting part 4 with a thin belt tooth part 3 on the inside.
Since the type part 2 and the belt tooth part 3 are not provided at the boundary part 4a of the type group (blank printing part), in printing, the type part 2a adjacent to the boundary part 4a When printing on the paper 5 placed on the platen 6, when the type part 2a is struck by the hammer 7, the print mask 8 should come into contact with the next type part 2b and the boundary part 4a connecting the type group. Normally, it comes into contact with the type parts 2 adjacent to the left and right of the type part 2 to be printed, and prevents the type parts 2 other than the intended character part 2 from coming into contact with the paper 5, but this boundary part 4a, since the type part 2 is not provided, the type part 2c located across the boundary part 4a protrudes beyond the thickness of the print mask 8 and vibrates, contacts the paper 5 and causes the paper 5 to There was a problem of contamination.

<Means for Solving the Problems> The present invention was devised to solve the above-mentioned problems. A protrusion lower than the height of the printed characters is formed between the printed characters that form the boundaries of the printed characters forming the group.

《Operation》 The protrusions provided at the boundaries of the type groups allow the print mask to be in the same state as if it were in contact between the type parts, which suppresses the vibration of the type belt and prevents unnecessary printing. This also prevents the paper from becoming dirty due to ink adhesion.

<<Example>> Hereinafter, an example of the present invention will be described based on the drawings.

First, FIG. 1 shows a type belt 10 according to the present invention.
FIG. 2 is a plan view of a main part showing the state of a boundary portion 14 between character groups G1 and G2. As shown in the figure, the type belt 10 is provided with a type portion 11 and a belt tooth portion 12 at the same pitch via a connecting portion 13 in the inner and outer peripheral directions thereof, and a boundary portion 1 between the type groups G1 and G2.
4 includes a type portion 1 disposed via a boundary portion 14.
A protrusion 15 is arranged between 1a and the type part 11b at a height slightly lower than that of the type part 11.

Next, the operating state of the present invention will be explained with reference to the main part plan view of FIG. 2 showing the operating state. In order to print characters on the paper 5 placed on the platen 6, a type belt 10 is used.
The belt tooth portion 12 corresponding to the upper printed portion 11a is
This is done by pressing with a hammer 7. In this case, the print mask 8 is
and the protrusion 15, and one of the type portions 11c of the type belt 10 adjacent to the boundary portion 14
In addition, vibration generation in the printing area 11c is suppressed.
is sufficiently spaced from the paper 5 to prevent ink from adhering to the paper 5 and staining it.

<<Effect of the invention>> Therefore, according to the type belt according to the present invention having the above configuration, a protrusion lower than the height of the type parts is formed between the type parts and between the boundary parts of the type groups,
Since the printing mask is constructed so that this protrusion comes into contact with the type part adjacent to the type part to be printed, the structure is extremely simple, and vibrations caused by the pressure of the hammer can be prevented from occurring in the type part other than the printing part of the type belt. In addition, the effect of preventing ink stains due to contact between unintended printed portions and paper can be obtained.

[Brief explanation of the drawing]

Fig. 1 is a plan view of the main part showing an embodiment of the present invention, Fig. 2 is a plan view of the main part showing the operating state of the invention, and Fig. 3 is a plan view of the main part showing an embodiment of the present invention.
The figure is a plan view of main parts showing a conventional example. 10... Type belt, 11, 11a, 11b,
11c...Printed part, 12...Belt tooth part, 13...
...Connection part, 14...Boundary part, 15...Protrusion.

Claims (1)

[Scope of utility model registration request] In a type belt for a serial printer in which a large number of type parts are formed at predetermined intervals on the outer periphery side, the type parts form a plurality of type groups, and the height of the type part is set between the type parts forming the boundaries of the type groups. A type belt characterized by integrally formed protrusions that are lower than the size.