JPH0410068Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an ink ribbon cassette for a printer or the like used as a terminal for a computer or the like.

[Conventional technology]

The rotary feed device and rotary press device installed inside the cassette body for transporting and folding the ink ribbon stored in the cassette body include:
As shown in Fig. 5, a plastic feed gear 1 and presser gear 2 are combined, or a third
As shown in FIG. 4, a combination of a feed roller 3 made of rubber or polyurethane foam and a press roller 4 is mainly used.

[Problems to be solved by the invention] By the way, when the ink ribbon is folded by these devices, it is difficult for the ink ribbon to slip when using a gear, but it has the advantage of being able to obtain a large folding force. Later, due to the weak frictional resistance based on the material of the gear, the ink ribbon immediately separates from the gear, resulting in the ink ribbon 5 being folded in a disordered state as shown in FIG. The disadvantage is that the length of the ribbon that can be stored in the ribbon is short, and in the case of rollers, a slight frictional force is maintained between the roller and the ribbon even after the ribbon is rolled in, and the ribbon does not move away from the roller. Since the ink ribbon 5 is not separated immediately but is transported by the rollers, the ink ribbon 5 is folded regularly as shown in FIG. On the other hand, the retracting force is small due to the fact that it is easily affected by ink, so even if measures are taken to compensate for this, such as increasing the pressing force of the presser roller, the roller will instead become deformed. There were many flaws.

The object of the present invention is to eliminate the above-mentioned drawbacks, namely, to provide an ink ribbon cassette which has a large retracting force, can fold the ink ribbon in a regular manner, and has a long ribbon length that can be stored, that is, has a long life.

[Means for solving problems]

The ink ribbon cassette of the present invention devised to achieve the above object is an ink ribbon cassette equipped with a set of a rotary feed device and a rotary presser device that have the function of jointly transporting and folding the ink ribbon stored in the cassette body. In the set, the rotary feed device and the rotary presser device are each constructed by combining a plastic gear and a roller made of a foam such as rubber or polyurethane or a compressed product of the foam. It is.

〔Example〕

FIG. 1 is a schematic plan view of an ink ribbon cassette 6 according to an embodiment of the present invention with the top cover removed.
The ink ribbon cassette 6 has one end thereof,
It is constructed by disposing a pair of rotary feed device 8 and rotary presser device 9, which have the function of jointly transporting and folding the endless ink ribbon 7 stored in the cassette body.

Figure 2 shows the rotary feed device 8 and the rotary presser device 9.
2 is a side view of a half part shown in a vertical cross section showing an assembled state, and the rotary feed device 8 has a plastic gear 10 in the center, plastic gears 10 above and below it, and rollers 11 made of polyurethane foam with a circular diameter. , 11 are disposed and are integrally assembled to the feedshaft 12.
Also, the rotary presser device 9 has only one gear 1 like the rotary feed device 8, except that the outer diameter is slightly reduced.
3 and two rollers 14, 14.

The structure of the combination of plastic gears and foam rollers is free, and the number, position, etc.
Various combinations of embodiments with different orders are possible. However, in this case, the number of plastic gears and foam rollers in the rotary feed device,
It goes without saying that the position and order must correspond to the number, position and order of these in the rotary holding device.

[Effect]

With the above configuration, the present invention enables the ink ribbon to be reliably fed in without slipping, mainly due to the engagement between the plastic feed gear and the presser gear when the ink ribbon is fed in. Next, the frictional force of the foam roller acts on the ink ribbon after it has been rolled in, and the ink ribbon is sent out while being wound for a while, making it possible to fold the ink ribbon regularly as shown in Figure 4. do.

[Effect of idea]

The present invention has the above-mentioned structure and operation, and combines the advantages of the gear type and roller type, and has a large ink ribbon retraction force and regular folding of the ink ribbon, resulting in a high ink ribbon storage capacity. In other words, it is possible to provide an ink ribbon cassette with a long life.

[Brief explanation of the drawing]

Figures 1 and 2 show an embodiment of the present invention. Figure 1 is a schematic plan view of the ink ribbon cassette with the top cover removed, and Figure 2 is a semi-longitudinal cross-section of the assembly portion of the rotary feed device and rotary presser device. FIG. Furthermore, FIGS. 3 to 5 show conventional examples.
Fig. 3 is a half-vertical cross-sectional side view of the assembled portion of the roller-type rotary feed device and rotary presser device, Fig. 4 is a plan view showing how the ink ribbon is folded in by the roller-type device, and Fig. 5 is the gear-type device. FIG. 3 is a plan view showing a folded state of the ink ribbon. 1...Feed gear, 2...Press gear, 3...
Feed roller, 4...Press roller, 5,5
... ink ribbon, 6 ... ink ribbon cassette, 7 ... ink ribbon, 8 ... rotary feed device, 9 ... rotary presser device, 10 ... gear, 11,
11...Roller, 12...Feedshaft,
13...Gear, 14,14...Roller.

Claims (1)

[Scope of utility model registration request] In an ink ribbon cassette, the ink ribbon cassette is equipped with a rotary feed device and a rotary presser device, each of which has the function of jointly transporting and folding the ink ribbon stored in the cassette body. An ink ribbon cassette characterized in that it is constructed by combining a plastic gear and a roller made of a foam such as rubber or polyurethane, or a compressed product of the foam.