JPH0514867Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field This invention relates to a ribbon cassette used in a printing machine.

Prior Art Although only one side is shown, as shown in Fig. 8,
In the case body 2 that stores the endless ribbon,
The lower end of the drive roller 6 having an annular groove 5 perpendicular to the axis is rotatably fitted, and the upper end of the drive roller 6 is rotatably fitted into a cover plate (not shown) that closes the opening surface of the case body 2. Further, a holder 9 in which a driven roller 8 having an annular groove 7 orthogonal to the axis is rotatably held is urged toward the driving roller 6 side and installed in the case body 2, A ribbon presser 50 is provided at which one end is inserted and extends outward in the direction in which the driving roller 6 and the driven roller 8 face each other, so that the endless ribbon is held and fed between the driving roller 6 and the driven roller 8. There is a ribbon cassette made of

Problems to be solved by the invention Therefore, the driving roller 6 and the driven roller 8
Since the axis of the ribbon is parallel to the width direction of the ribbon, when the ribbon is drawn into the case body 2 from the outside to the inside by the driving roller 6 and the driven roller 8, the ribbon does not wrap around the driving roller 6 and the driven roller 8. This is prevented by the presser foot 50. However, if the ribbon is bent, there will be a part where the width direction of the ribbon is perpendicular to the axes of the driving roller 6 and the driven roller 8, and this will cause the end face of the driving roller 6 or the driven roller to overlap the case body 2. There is a problem in that the ribbon gets caught from the side edge between the bottom surface of the cover plate and the inner surface of the cover plate.

Means for Solving the Problem This invention forms a cassette case by attaching a cover plate to the opening surface of the case body, which has an opening on one side and which stores an endless ribbon and has insertion portions formed on both sides to pass the ribbon through. A drive roller and a driven roller, each having an annular groove perpendicular to the axial direction, are rotatably provided in the cassette case with their outer peripheral surfaces in contact with each other, one end of which is inserted into the annular groove and connected to the drive roller. In a ribbon cassette provided with a ribbon presser extending outward in a direction facing the driven roller, the ribbon presser is opposed to the end surfaces of the driving roller and the driven roller and extends outward in the direction facing the driving roller and the driven roller. The present invention is characterized in that a ribbon edge presser is integrally formed on the bottom surface of the case body and the inner surface of the cover plate.

Function: Therefore, when the ribbon is held between the drive roller and the driven roller and drawn into the cassette case from the outside to the inside, the ribbon presser prevents the central part from being caught in the drive roller and the driven roller, and the ribbon is Even if the side edge is partially bent and falls between the end face of the drive roller or driven roller and the bottom of the case body or the inner surface of the cover plate, the side edge will not be caught in the drive roller or driven roller by the ribbon edge presser. Prevented.

Embodiment An embodiment of this invention will be described based on FIGS. 1 to 7. First, the overall configuration is shown in FIGS. 1 and 2. 1 is a cassette case, and this cassette case 1 has a case body 2 with an opening on one side and a cover plate 3 that closes the opening surface of this case body 2.
It is formed by combining. A drive roller 6 having a knob 4 and a plurality of annular grooves 5 perpendicular to the axial direction is rotatably held on one side of the cassette case 1. A holder 9 is provided which rotatably supports a driven roller 8 having a groove 7. In addition, the case body 2 is formed with insertion portions 10 on both sides for passing an endless ribbon, and furthermore, on one side of the case body 2, the intermediate shaft portion of the drive roller 6 can be rotated freely, facing the holder 9. A holder 11 that is held in place is fixedly fitted. The holder 9 is integrally formed with a ribbon presser 12 inserted into the annular groove 7 of the driven roller 8, and the holder 11 is integrally formed with a ribbon presser 13 whose one end is inserted into the annular groove 5 of the drive roller 6. is formed. These ribbon pressers 12 and 13 are inclined toward the inside of the cassette case 1 as they extend outward in the direction in which the driving roller 6 and the driven roller 8 face each other. Thus, a ribbon edge presser 14 is integrally formed on the bottom surface of the case body 2 and faces the lower end surfaces of the driving roller 6 and the driven roller 8, and on the inner surface of the cover plate 3, the upper portion of the driving roller 6 and the driven roller 8 is formed. A ribbon edge presser 15 facing the end face is integrally formed. Further, the case body 2 has a groove 16 in which a part of the holder 9 is rotatably fitted and held.
is formed, and a spring 17 that abuts against the back surface of the holder 9 is provided.

Although only a portion is shown in FIG. 3, it is a plan view of the case body 2, in which a hole 18 is formed in which a shaft portion protruding from the lower end of the drive roller 6 is fitted and held rotatably. Further, FIG. 4 is a longitudinal sectional side view of the case body 1, and the length of the ribbon edge presser 14 becomes gradually longer as it goes toward the inside of the case body 2. Fifth
The figure is a plan view of a portion of the case body 2 in which the holders 9 and 11 are assembled, and the holder 9 is urged by a spring 17, whereby the driven roller 8 is pressed against the driving roller 6. FIG. 6 is a plan view of the cover plate 3, in which a hole 19 is formed through which the knob 4 of the drive roller 6 projects. FIG. 7 is a longitudinal side view of the cover plate 3, in which the ribbon edge presser 15 is short in length only at the opposing upper ends of the driving roller 6 and driven roller 8, but the other parts are directed toward the bottom of the case body 2. It stands out and has a long length.

In such a configuration, an endless ribbon (not shown) is folded and stored inside the cassette case 1, and a portion of it is pulled out from the insertion portion 10 to the front of the platen (not shown). Then, by attaching the cassette case 1 to the printer and driving the drive roller 6 by the ribbon drive shaft on the printer side, the ribbon is held between the drive roller 6 and the driven roller 8 and is inserted into the insertion portion on one side from the front of the platen. 10 and into the inside of the cassette case 1, and the ribbon is pulled out from the insertion portion 10 on the other side to the front of the platen.

By the way, when the ribbon is drawn into the drive roller 6 and the driven roller 8, the ribbon pressers 12 and 13 prevent it from being wound around the drive roller 6 and the driven roller 8, and the ribbon is guided into the cassette case 1. In addition, if the ribbon is broken in the middle, its width direction will be perpendicular to the axes of the driving roller 6 and driven roller 8, and the edge of the ribbon will meet the end face of the driving roller 6 or driven roller 8, the bottom of the case body 2, or the cover. Although it may get between the inner surface of plate 3,
The ribbon edge presser 14 or 15 prevents the ribbon from wrapping around the drive roller 6 or the driven roller 8.

Effects of the invention Since this invention is constructed as described above, when the ribbon is held between the driving roller and the driven roller and drawn into the cassette case from the outside to the inside, the central part of the ribbon is prevented from being caught in the driving roller and the driven roller. This can be prevented by using a ribbon holder, and even if the ribbon partially breaks and its side edge gets between the end of the drive roller or driven roller and the bottom of the case body or the inner surface of the cover plate, the drive roller and The ribbon edge presser has the effect of preventing the side edge from getting caught in the driven roller.

[Brief explanation of the drawing]

Figures 1 to 7 show an embodiment of this invention, in which Figure 1 is a vertical side view, Figure 2 is a partial perspective view with the cover plate removed, and Figure 3 is a partial perspective view with the cover plate removed.
Figure 4 is a plan view of a portion of the case body, Figure 4 is a vertical side view of the case body, Figure 5 is a partial plan view showing the state in which the holder is assembled into the case body, and Figure 6 is a plane view of the cover plate. 7 are longitudinal sectional side views of the cover plate, and FIG. 8 is a partial perspective view showing a conventional example. 1...Cassette case, 2...Case body, 3
...cover plate, 5 ... annular groove, 6 ... drive roller, 7 ... annular groove, 8 ... driven roller, 10
...Insertion part, 12, 13...Ribbon presser, 14,
15... Ribbon edge presser.

Claims (1)

[Scope of utility model registration request] A cassette case is formed by attaching a cover plate to the opening surface of a case main body with an opening on one side, which stores an endless ribbon and has insertion portions for passing the ribbon formed on both sides. a ribbon rotatably provided in the cassette case with a roller and a driven roller in contact with each other with their outer peripheral surfaces, one end of which is inserted into the annular groove and extends outward in a direction in which the driving roller and driven roller face each other; In the ribbon cassette provided with a presser, a ribbon edge presser that faces the end surfaces of the driving roller and the driven roller and extends outward in the direction in which these driving rollers and the driven rollers are opposed is connected to the bottom surface of the case body and the cover. A ribbon cassette characterized by being integrally formed with the inner surface of a plate.