JP2783060B2 - Ink 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 an impact printer, and more particularly to an ink ribbon cassette capable of replacing an ink ribbon.

[0002]

2. Description of the Related Art A conventional ink ribbon cassette comprises an ink ribbon impregnated with ink, a driving roller and a passive roller capable of running the ink ribbon, and
A leaf spring capable of applying a constant tension to the ink ribbon, the ink ribbon, a driving roller, a passive roller,
And a cassette case for storing the leaf spring.

In the conventional ink ribbon cassette, when the stored ink ribbon has reached the end of its service life, the amount of ink impregnated in the ink ribbon has decreased and the information transferred to the paper has become thinner, or there has been an operational mistake. As a result, when the ink ribbon travel becomes unstable and the fabric of the ink ribbon is damaged, only the ink ribbon may be replaced.

When storing a new ink ribbon in the cassette case, it is necessary to insert the ink ribbon while separating the leaf spring from the contact portion of the cassette case by means such as applying a force to a leaf spring that applies a constant tension to the ink ribbon. There is.

[0005]

In the conventional ink ribbon cassette in which the ink ribbon can be replaced, a leaf spring for applying a constant tension to the ink ribbon is separated from a part of the cassette case which is in contact with the cassette spring by a certain means. Since it is necessary to insert an ink ribbon, there is a problem that replacement of the ink ribbon is complicated.

[0006]

According to the present invention, there is provided an ink ribbon cassette comprising: an ink ribbon impregnated with ink; a driving roller and a passive roller for running the ink ribbon; And a leaf spring having an inclined portion at the top as a call.

Further, the ink ribbon cassette of the present invention comprises:
An ink ribbon impregnated with ink, a driving roller and a passive roller for running the ink ribbon, a leaf spring having a portion protruding from the upper surface of the cassette case while pressing the ink ribbon against a part of the cassette case, A cassette cover having a hole having a side surface inclined at a position facing the protruding portion of the leaf spring and coupled to a cassette case;

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view showing a first embodiment of the present invention. FIG. 2 is an enlarged view of the leaf spring portion of FIG.

In FIG. 1, the ink ribbon cassette of the present invention provides an ink ribbon 1 impregnated with ink, a driving roller 2a and a passive roller 2b capable of running the ink ribbon 1, and a tension applied to the ink ribbon 1. For this purpose, a cassette case 4 for accommodating a leaf spring 3 having a sloped portion as a contact at the upper portion thereof, which is in contact with a portion 4a of the cassette case 4 via the ink ribbon 1.

When the used ink ribbon is replaced with a new ink ribbon 1, when the new ink ribbon is stored in the cassette case, the ink ribbon 1 is moved from the upper portion to the inclined portion at the upper portion of the leaf spring 3. By pressing, the ink ribbon 1 can be inserted between the leaf spring 3 and the contact portion of the cassette case 4. At this time, there is no need to take any action to separate the leaf spring 3 from the contact portion of the cassette case 4.

FIG. 3 is an explanatory view showing a second embodiment of the present invention, and FIG. 4 is an explanatory view showing a state in which a cassette cover is connected in FIG.

Referring to FIGS. 3 and 4, the ink ribbon cassette of the present invention comprises an ink ribbon 1 impregnated with ink, a driving roller 2a and a passive roller 2b capable of running the ink ribbon 1, and a cassette. A leaf spring 3a having a portion protruding from the upper surface of the case 4, a cassette cover 5 having a hole 5a whose side face facing the protruding portion of the leaf spring 3a when the cassette cover 5 is attached to the cassette case 4, The cassette case 4 includes an ink ribbon 1, a driving roller 2 a, a passive roller 2 b, and a leaf spring 3.

When replacing a used ink ribbon with a new ink ribbon 1, the cassette cover 5 is removed from the cassette case 4. In this state, the ink ribbon 1 is placed between the leaf spring 3a and a portion 4a of the cassette case 4.
There is enough clearance to insert Therefore, the ink ribbon 1 can be easily inserted between the leaf spring 3a and a part 4a of the cassette case 4.

After the ink ribbon 1 is inserted, the cassette cover 5 is attached to the cassette case 4 so that the protruding portion of the leaf spring 3a is formed in the hole 5a formed in the cassette cover 5.
In contact with the sloping sides. Then, when the cassette cover 5 is pushed in, the tip of the protruding portion of the leaf spring 3a moves along the inclined side surface of the hole 5a, and the leaf spring 3 approaches the part 4a of the cassette case 4, and finally the leaf spring 3a and the cassette A portion 4a of the case 4 comes into contact, and it is possible to apply a load to the ink ribbon 1.

[0016]

As described above, according to the present invention, since the ink ribbon can be inserted between the leaf spring and the cassette case so as to guide the ink ribbon, the ink can be supplied without operating the leaf spring for applying a constant tension to the ink ribbon. This has the effect that the ribbon can be easily replaced.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a first embodiment of the present invention.

FIG. 2 is an enlarged view of a leaf spring portion in FIG.

FIG. 3 is an explanatory view showing a second embodiment.

FIG. 4 is an explanatory view showing a state where a cassette cover is connected in FIG. 3;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Ink ribbon 2a Drive roller 2b Passive roller 3, 3a Leaf spring 4 Cassette case 5 Cassette cover 5a Cassette cover hole

Claims (2)

(57) [Claims] 1. An ink ribbon impregnated with ink, a drive roller and a passive roller for running the ink ribbon, and an inclined portion serving as a drawer at an upper portion of the ink ribbon for pressing the ink ribbon against a part of a cassette case. An ink ribbon cassette comprising a leaf spring. 2. An ink ribbon impregnated with ink, a driving roller and a passive roller for running the ink ribbon, and a part protruding from an upper surface of the cassette case while pressing the ink ribbon against a part of the cassette case. 2. The ink ribbon cassette according to claim 1, further comprising a leaf spring having a hole, a side surface of which is inclined at a position opposed to a protruding portion of the leaf spring, and a cassette cover coupled to a cassette case. .