JP2531072Y2 - Ink ribbon cassette - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial application field) The present invention relates to an ink ribbon cassette to be mounted on a recording device such as a printer or a facsimile.

(Prior Art) Conventionally, as shown in Japanese Patent Application Laid-Open No. 1-257085 (particularly, FIG. 8), a concave portion is provided at a required position of a side wall of a case, into which a recording head is fitted when the recording device is loaded into a recording device. A supply core with an ink ribbon wound around one end in the case,
A winding core for the ink ribbon is disposed at the other side end, and after the ink ribbon is pulled out from the supply core, the ink ribbon is once exposed to the outside of the case in the concave portion and then re-enters the case to reach the winding core. 2. Description of the Related Art An ink ribbon cassette is known in which a travel path is formed, and friction members are provided on both sides of a concave portion in the travel path of the ink ribbon so as to abut on the ink ribbon and bend the ink ribbon into a V shape.

However, this ink ribbon cassette can prevent the ink ribbon from relaxing when the ink ribbon travels, but cannot prevent the ink ribbon from relaxing when the supply core rotates freely when the ink ribbon does not travel. There was a problem.

On the other hand, an ink ribbon cassette that prevents the ink ribbon from relaxing not only when the ink ribbon is running but also when the ink ribbon is not running has been devised. That is, on both sides of the concave portion in the travel path of the ink ribbon, a spring member having a friction member that abuts against the ink ribbon and presses the ink ribbon against a guide projection provided in the case is installed, and when the ink ribbon travels, Appropriate braking is applied to the ink ribbon, and when the ink ribbon is not running, the ink ribbon is prevented from being pulled out and loosened in the concave portion, and a U-shaped bent portion is provided at a required position either before or after the concave portion. A different spring member is provided to prevent the ink ribbon in the case from running loose by running the U-shaped bent portion into contact with the ink ribbon to bend the ink ribbon into a V shape. It has a structure.

However, in this ink ribbon cassette, it is necessary to attach a total of three spring members, namely, two spring members having a friction member attached thereto and one spring member having a U-shaped bent portion. There was a problem that was difficult to plan.

(Problems to be solved by the present invention) Therefore, the present invention is applied not only when running the ink ribbon,
It is an object of the present invention to provide an ink ribbon cassette which can prevent the ink ribbon from being loosened when the ink ribbon is not running, and which can reduce the number of spring members used as the means to simplify assembly and reduce cost. I do.

(Means for Solving the Problems) In order to achieve the above object, the ink ribbon cassette of the present invention is provided with a concave portion 1a at a required position on the side wall of the case 1 into which a recording head is inserted when the recording head is loaded in a recording apparatus. ,
A supply core 3 around which the ink ribbon 2 is wound is provided at one end of the case, and a take-up core 4 of the ink ribbon 2 is provided at the other side end, and the ink ribbon 2 is pulled out from the supply core 3. In the ink ribbon cassette which is once exposed to the outside of the case in the concave portion 1a and then re-enters the case to reach the take-up core 4, the ink ribbon cassette constitutes a traveling path of the ink ribbon 2 from the supply core 3 to the concave portion 1a in the traveling path of the ink ribbon. The ink ribbon 2 is pressed against the guide projection 9 in the case 1 in contact with the ink ribbon
At the same time, a spring member 6 to which a friction member 5 for sandwiching the ink ribbon 2 is attached is installed.
The base end is fixed to the case 1 and the front end is cantilevered so as to be free, and a U-shaped bent portion 7a is formed at the front end thereof, and friction occurs on the U-shaped bent portion 7a. The friction member 8 is attached to the ink ribbon 2 so that the ink ribbon 2 is bent in a V shape when the ink ribbon 2 is running, and the ink ribbon 2 is moved to the case 1 when the ink ribbon 2 is not running. The present invention is characterized in that a spring member 7 is provided, which is pressed against a projection provided in the inner wall or the case and abuts the ink ribbon 2 together with the inner wall or the projection.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.
A supply core 3 around which an ink ribbon 2 is wound is provided at a right end of the case 1, and a take-up core 4 which is rotated and driven by the recording device when loaded into the recording device is provided at the other left end. is set up. At a position near the left end of the upper side wall of the case 1, a concave portion 1a into which a recording head is fitted when the recording device is loaded is provided. Ink ribbon 2
Are a plurality of guide projections 9 after being pulled out from the supply core 3.
Then, it is guided by one roller-attached projection 10 and is once exposed to the outside of the case in the concave portion 1a. Thereafter, it enters the case again, is wound around the guide projection 9, and reaches the winding core 4. In the travel path of the ink ribbon 2, a felt-made friction member 5 for applying a brake in contact with the ink ribbon 2 is applied to a tip of the case 1 on the way from the supply core 3 to the recess 1 a. A plate-like spring member 6 fixed to the right side wall of is provided. The friction member 5 is urged and pressed by a spring member 6 so as to sandwich the ink ribbon 2 on one guide projection 9. In the travel path of the ink ribbon 2, at a position halfway from the concave portion 1 a to the winding core 4, the base end is fixed to the left side wall of the case 1 and the tip is freely cantilevered. A U-shaped bent portion 7a is formed and a friction member 8 made of felt is adhered to the bulging surface of the U-shaped bent portion 7a.
A spring member 7 is provided for abutting the ink ribbon 2 between the projection 12 on the inner surface of the ink ribbon 2 and the projection 9 for guide so as to bend the ink ribbon 2 therebetween in a V shape. While the ink ribbon 2 is not running, the friction member 8 presses the ink ribbon 2 against the inner surface of the side wall 11 of the concave portion 1a as shown in the figure. The ink ribbon 2 is pushed by the ink ribbon 2 in the direction opposite to the side wall 11 of the concave portion 1a, and the ink ribbon 2 is brought into a non-contact state with the side wall 11.

(Operation and Effect) The present invention is as described above. When the ink ribbon 2 travels, the friction members 5 and 8 contact the ink ribbon 2 on both sides of the concave portion 1a, so that the ink ribbon 2 is appropriately braked. And the friction member 8 attached to the U-shaped bent portion 7a simultaneously bends the ink ribbon 2 into a U-shape, so that the ink ribbon 2 can be prevented from being loosened. During running, the friction members 5 and 8 press the ink ribs 2 against the guide projections 9 and the inner wall of the case 1 on both sides of the concave portion 1a, thereby preventing the ink ribbon 2 from being pulled out and relaxed in the concave portion 1a. it can. As described above, the ink ribbon cassette of the present invention has the functions of the three spring members provided in the above-described conventional ink ribbon cassette, but can reduce the number of spring members by one, thereby simplifying assembly and reducing costs. Is what you do.

[Brief description of the drawings]

The figure is a plan view in which a part of the upper surface of the case is broken. 1 ... case, 1a ... recess, 2 ... ink ribbon, 3 ...
... Supply core, 4 ... Rewind core, 5 ... Friction member, 6 ...
Spring member, 7: Spring member, 7a: U-shaped bent portion, 8:
... friction member, 9 ... projection for guide, 10 ... projection with roller, 11 ... side wall of recess, 12 ... projection on inner surface of side wall of recess.

Claims (1)

(57) [Scope of request for utility model registration] 1. A concave portion 1a into which a recording head is inserted when the recording head is loaded in a recording apparatus is provided at a required position on a side wall of a case 1, and a supply core 3 wound with an ink ribbon 2 is wound around one end in the case. In addition, the winding cores 4 of the ink ribbon 2 are respectively provided at the other side ends, and after the ink ribbon 2 is pulled out from the supply core 3, the ink ribbon 2 is once exposed to the outside of the case by the concave portion 1 a and then re-entered into the case. In the ink ribbon cassette constituting the traveling path of the ink ribbon 2 to the take-up core 4, the ink ribbon 2 is brought into contact with the ink ribbon 2 at a part of the traveling path of the ink ribbon from the supply core 3 to the recess 1a. 1 and a spring member 6 to which a friction member 5 for holding the ink ribbon 2 together with the guide protrusion 9 by pressing the guide protrusion 9 is installed. The base end is fixed to the case 1 and the front end is cantilevered so as to be free. A U-shaped bent portion 7a is formed at the front end, and a friction member 8 is attached to the U-shaped bent portion 7a. The friction member 8 is bent in a V-shape when the ink ribbon 2 travels with respect to the ink ribbon 2, and when the ink ribbon 2 is not traveling, the ink ribbon 2 is placed on the inner wall of the case 1 or inside the case. An ink ribbon cassette provided with a spring member (7) for pressing against the provided protrusion and abutting the ink ribbon (2) so as to sandwich the ink ribbon (2) together with the inner surface wall or the protrusion.