JP2575835Y2 - Ribbon cassette - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ribbon cassette in which an endless ink ribbon is folded and stored in a fabric, and is run.

[0002]

2. Description of the Related Art Conventionally, when refilling a ribbon with a ribbon cassette, the ribbon is stretched over an outlet and an entrance, and the other portion is stored in a ribbon storage chamber. The ribbon was inserted into the gap and pinched.

[0003] However, this work of refilling a new ribbon has disadvantages such as troublesome insertion of the ribbon between the tension spring and the receiving portion, and dirty hands. Further, when the tension spring is flexed, if it is forcibly deformed, the shape may be changed beyond the elastic limit, and the tension force may be changed to cause a trouble.

[0004]

SUMMARY OF THE INVENTION The present invention eliminates these drawbacks, that is, it enables a gap between a tension spring and a receiving portion to be automatically opened without using a hand, and a tension spring is provided. It is an object of the present invention to provide a ribbon cassette that does not forcibly deform the ribbon cassette.

[0005]

Means for Solving the Problems To solve the above problems, the present inventor provided a ribbon cassette, a case and a lid provided with a pair of feed rollers, and made the endless ink ribbon run on a fabric. And a ribbon cassette provided with a tension spring and a receiving portion that folds and accommodates the ink ribbon in the ribbon accommodating chamber and has a resilient force on the bottom piece of the case;
A projection that constantly presses so as to separate the tension spring from the receiving portion is erected, and a hole is provided in the lid where the projection is inserted and slides,
When the lid is mounted on the case, the protrusion is inserted into the hole and slides to bend against the elasticity, thereby releasing the tension spring and pressing the tension spring against the receiving member. It was a configuration.

[0006] The sliding surface in the present invention may be a surface perpendicular to the bottom piece, but operation is more preferable if the surface is inclined. The holes may be square holes or round holes.

[0007]

[Function] When the lid is attached to the case with the cassette of the present invention,
The protruding piece is inserted into the hole of the lid, and the protruding piece bends and moves in the direction of the arrow in FIG. 2 and FIG. 3 (from the chain line to the solid line). Therefore,
Since the tension spring is released from the pressure from the protruding piece, it moves toward the receiving portion by the resilient force, and presses with the ink ribbon sandwiched therebetween to apply a tension force to the ink ribbon. Also,
When the lid is removed from the case, the projecting piece is disengaged from the hole and returns to its original state by the resilient force, and the projecting piece and the tension spring move from the solid line in FIGS. Therefore, since the tension spring is automatically separated from the receiving portion, a gap is formed between both portions.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described with reference to the drawings. FIG.
FIG. 2 is a plan view of the embodiment of the present invention with the lid removed, FIG. 2 is an enlarged view of the tension mechanism of FIG. 1, FIG. 3 is an enlarged sectional view taken along the line AA of FIG. 2, and FIG. FIG. 5 is a partial perspective view in a state where a lid is removed.

In the figure, 1 is a case, 2 is a lid, 3 is an ink ribbon, 4 is a ribbon storage chamber, and the case 1 has a bottom piece 5 and a side piece 6 in a box shape. At the ribbon entrance side of the case 1 and the lid 2, a pair of filters for holding and running the ink ribbon 3 and folding and storing it in the ribbon storage chamber 4 are provided.
The drawers 7, 7 are rotatably mounted. A tension spring 8 is mounted on the ribbon outlet side of the case 1, and a rib-shaped receiving portion 9 and a projecting piece 10 are erected from the bottom piece 5.

The receiving portion 9 has a height slightly lower than that of the side piece 6 and is provided at a position where the tip of the tension spring 8 is constantly pressed by the elastic force. The projecting piece 10 is an elastic piece having a height higher than that of the side piece 6, and the outer surface of the tip is inclined to form a sliding surface 11. When the protruding piece 10 does not bend and is in a normal state, it always presses the tension spring 9 below the sliding surface 11 and separates the tension spring 9 from the receiving portion 9 so that a gap can be formed (see FIG. 2, the chain line in FIG. 3)
When the distal end of the cable 10 is bent inwardly, it is erected at a position where the pressure on the tension spring 9 can be released (solid line in FIGS. 2 and 3).

The cover 2 has the same outer shape as the case 1 so as to be attached to form an integral shape.
Is provided. The hole 12 allows the protrusion 10 to be inserted and
When the sliding surface 11 of the sliding member 10 is slid downward, the projecting piece 10 bends inward from the chain line in FIG.
It is provided at a position where the pressing of the ten tension springs 8 can be released.

When the case 1 and the lid 2 are mounted on the ribbon cassette of this embodiment, the tip of the protruding piece 10 is inserted into the hole 12, and when the sliding face 11 is slid, the protruding piece 10 is moved to the position shown in FIGS. At 3, it is deflected inward from the chain line in the direction of the solid line (the direction of the arrow), and the pressing on the tension spring 8 is released. As shown in FIG. 4, the distal end of the tension spring 8 from which the pressure has been released is moved toward the receiving portion 9 by the resilient force and pressed to apply a tension force to the ink ribbon 3 sandwiched therebetween. And printable.

When it is necessary to refill a new ink ribbon 3, the lid 2 is removed from the case 1 and the projection 10
As a result, the tension spring 8 returns to its original position due to its resilient force, and presses the tension spring 8 below the sliding surface 11, as a result of which, as shown in FIG. The gap is automatically formed away from the receiving portion 9. Therefore, the ink ribbon 3 can be easily inserted into this gap without bending the tension spring 8 by hand.

[0014]

According to the present invention, when the cover is opened, the tension spring can be automatically separated from the receiving portion to form a gap, so that the ink ribbon can be easily inserted into the gap and the cover is closed. Then, the tension spring automatically presses the receiving portion, so that a tension force is automatically applied to the ink ribbon and printing can be performed. Therefore, there are various effects such as easy refilling of the ribbon without bending the tension spring by hand and preventing the tension spring from being unduly deformed.

[Brief description of the drawings]

FIG. 1 is a plan view of an embodiment of the present invention with a lid removed.

FIG. 2 is a partially enlarged view of a tension mechanism of FIG. 1;

FIG. 3 is an enlarged sectional view taken along line AA of FIG. 2;

FIG. 4 is a partial perspective view of the embodiment with the lid attached.

FIG. 5 is a partial perspective view of the embodiment with a lid removed.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Case 2 Lid 3 Ink ribbon 4 Ribbon storage room 5 Bottom piece 7 Feed roller 8 Tension spring 9 Receiving part 10 Protrusion piece 12 hole

Claims (1)

(57) [Scope of request for utility model registration] A pair of feed rollers (7) are provided on a case (1) and a lid (2) to allow an endless ink ribbon (3) to run on a fabric, and a ribbon storage chamber (7). 4) In a ribbon cassette provided with a tension spring (8) and a receiving portion (9) for applying tension to the ink ribbon (3) while being folded and stored in the bottom piece (5) of the case (1). A protruding piece (10) that has elasticity and constantly presses the tension spring (8) so as to separate it from the receiving part (9) is provided, and the protruding piece (10) is inserted into the lid (2) and slides. When the lid (2) is attached to the case (1),
The protruding piece (10) is inserted into the hole (12), slides and deflects against elasticity, thereby releasing the pressure on the tension spring (8) and releasing the tension spring (8). ) Ribbon cassette.