JPH0116624Y2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Technical Field The present invention relates to a ribbon cassette case that is used in a printing device such as a printer and stores an ink ribbon. (B) Prior Art In general, a ribbon cassette has a drive roller 1 and an idle roller 2, as shown in FIG. 2 and stored in the storage section 5. After the stored ink ribbon 4 is twisted into a Möbius strip,
The ribbon is carried out from the outlet 6, printed by the print head at the position indicated by the arrow, and then carried back into the ribbon cassette case from the inlet 7. FIGS. 2A and 2B are a perspective view and a side view showing the vicinity of the inlet 7 and outlet 6 of a conventional ribbon cassette case. As shown in these figures, the conventional ribbon cassette case has an inner wall 8 of the same height. and a cassette case body 10 having an outer wall 9, and a plate-shaped lid 1.
It was composed of 1. Therefore, when the ink ribbon 4 is stored, the joint surface between the cassette case body 10 and the lid 11 is located at approximately the same location as the upper end of the ink ribbon 4, as shown in FIG. (C) Disadvantages of the prior art When installing a ribbon cassette in a printing device such as a printer, the roller shaft of the drive roller 1 is normally mounted on a drive shaft that is vertically fixed to the cartridge of the printer body, and the roller axis of the drive roller 1 is mounted slightly diagonally from the vertical direction. The ribbon cassette is inserted into the drive shaft from the direction shown in FIG. Therefore, when a ribbon cassette is installed in a printer, a pushing force is applied to the ink ribbon 4 in an almost vertical direction as shown by the arrow in FIG. However, there was a drawback that the ink ribbon 4 was caught in the joint between the cassette case body 10 and the lid 11 . (iv) Purpose of the invention The present invention provides a new ribbon cassette case that prevents the ink ribbon from getting caught in the joint between the cassette case body and the lid when the ribbon cassette is installed in a printing device such as a printer. This is what we provide. (E) Embodiment FIGS. 3A and 3B are a perspective view and a side view showing the vicinity of the inlet 7 and outlet 6 of a ribbon cassette case which is an embodiment of the present invention, and show the cassette case body 10 and lid body 11 . Shows the separated state. As shown in the figure, in the ribbon cassette case of the present invention, convex portions 12 and 13 are provided on the inner and outer edges of the lid 11 , respectively, and on the inner wall 14 and outer wall 15 of the cassette case body 10 , Recesses 16 and 17 are provided to fit into the projections 12 and 13 provided on the lid 11 , respectively. And lid body 1
A locking protrusion 18 is provided in the protrusion 12 of the cassette case body 10 , and a locking hole 19 is provided in the recess 16 of the cassette case body 10. Therefore, insert the locking protrusion 18 into the locking hole 19,
When the convex parts 12 and 13 and the concave parts 16 and 17 are respectively fitted and the cassette case body 10 and the lid body 11 are joined, as shown in FIG. 4, the cassette case near the inlet 7 and outlet 6 of the ribbon cassette case The joint surface between the main body 10 and the lid body 11 has a step difference from the joint surfaces of other parts. That is, when the ink ribbon 4 is stored, there is a step between the joint surface of the cassette case body 10 and the lid 11 and the upper end of the ink ribbon 4 near the inlet 7 and outlet 6 of the ribbon cassette case. As a result, the joint surface between the cassette case body 10 and the lid 11 is moved away from the upper end of the ink ribbon 4. Therefore, when the ribbon cassette is installed in the printing device, even if a pushing force is applied to the ink ribbon 4 as shown by the arrow in FIG . Being pinched is prevented. In the above-described embodiment, both the inner wall 14 and the outer wall 15 of the cassette case body 10 were provided with concave portions, and the lid body 11 was also provided with convex portions on both the inner and outer edges. Since the ink ribbon 4 runs along the inner wall 14 near the inlet 7 and outlet 6 of the case, the recess 17 on the outer wall 15 of the cassette case body 10 and the protrusion 13 on the outer edge of the lid 11 are not necessarily provided. . In addition, the inlet 7 and outlet 6 of the ribbon cassette case
Although a sufficient effect can be obtained by providing the concave portion 16 and the convex portion 12 on the cassette case body 10 and the lid body 11 only in the vicinity, the convex portions are provided on the entire inner edge of the lid body 11, and the cassette case body 10 has a convex portion. A recess may be provided in the entire inner wall 14. (f) Effects As described above, the ribbon cassette case according to the present invention has a concave portion on the inner wall of the cassette case body at least near the inlet and outlet of the ribbon cassette case, and a convex portion that fits in the concave portion on the inner edge of the lid body. With this provision, when the ribbon cassette is installed in the printing device, it is possible to reliably prevent the ink ribbon from being caught in the joint between the cassette case body and the lid body.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing the entire general ribbon cassette, Fig. 2 A and B are perspective views and side views showing the vicinity of the inlet and outlet of the conventional ribbon cassette case, and Fig. 3 A and B are the present invention. A perspective view and a side view showing the vicinity of the inlet and outlet with the cassette case main body and lid separated in the embodiment of the ribbon cassette case according to 2003, and Figures 4A and 4B show the cassette case main body of the embodiment shown in Figure 3. FIG. 3 is a perspective view and a side view showing the vicinity of the inlet and outlet in a state where the lid is joined. Explanation of main drawing numbers, 1... Drive roller, 2...
...Idle roller, 4...Ink ribbon, 6...
Exit, 7... Entrance, 8, 14... Inner wall, 9, 15
...Outer wall, 10 ...Cassette case body, 11 ...
... Lid body, 12, 13 ... Convex portion, 16, 17 ... Recess, 18 ... Locking projection, 19 ... Locking hole.

Claims (1)

[Scope of utility model registration request] In a ribbon cassette case that stores an ink ribbon and is composed of a cassette case body and a lid, a recess is provided in the inner wall of the ribbon cassette case at least near the entrance and exit, and the ribbon cassette case extends toward the recess and fits into the recess. A ribbon cassette case characterized in that a mating convex portion is integrally provided on the lid body.