JPH0649388B2 - Ink ribbon cassette - Google Patents

Description

Description: TECHNICAL FIELD The present invention is mounted on a printer main body so that a part of an ink ribbon is exposed in an open recess of a cassette main body and the exposed portion is passed through a print surface side of a print head. Related ink ribbon cassette.

[Technical Background of the Invention] As shown in FIGS. 11 and 12, in a conventional printer, a carriage 2 of a printer body 1 is provided with a print head 3, and an ink ribbon cassette 4 is provided for the carriage 2. Is configured to be attached and detached. Thus, the ink ribbon cassette 4 has an opening concave portion 6 formed at the side end portion of the cassette main body 5, and the ink ribbon 7 is partially opened in the cassette main body 5.
It is housed so that it is exposed to the bridge on the open surface of. As shown in FIG. 12, the ink ribbon cassette 4 is arranged on the carriage 2 so that the print head 3 is inserted into the open concave portion 6 of the cassette body 5. In this case, normally, the ink ribbon 7 The exposed part is the print head 3
Is passed through the printing surface 3a side.

[Problems of Background Art] However, in the above-described conventional ink ribbon cassette 4, when the ink ribbon 7 is loosened in the non-mounted state, the ink ribbon 7 may be displaced inwardly of the open concave portion 6, The problem that the ink ribbon 7 gets caught in the print head 3 when the cassette body 5 is attached,
The trouble of reloading the cassette body 5 is caused,
There was a problem that the ink ribbon was damaged.

[Object of the Invention] The present invention has been made in view of the above circumstances, and an object of the present invention is to allow the cassette main body to be smoothly attached to the printer main body and to eliminate the trouble of re-attachment. An object of the present invention is to provide an ink ribbon cassette that can eliminate damage to the ribbon.

SUMMARY OF THE INVENTION According to the present invention, a cassette body is attachable to and detachable from a printer body having a print head, and an opening recess for inserting a print head is formed in the cassette body, and an ink ribbon is partially opened in the opening recess. In the case where the print head is inserted into the open concave portion at the time of mounting so that the exposed portion of the ink ribbon is passed to the print surface side of the print head, Ribbon regulation that prevents the inward displacement of the exposed part of the ink ribbon in the open recess when the cassette body is not installed and allows the print head to be inserted into the open recess when the cassette body is installed. This is characterized in that the member is provided so that the ink ribbon is not caught by the print head of the printer body when the cassette body is mounted.

[Embodiment of the Invention] A first embodiment of the present invention will be described below with reference to FIGS. 1 to 5. Reference numeral 11 denotes a cassette body, which is made of synthetic resin in a rectangular case shape and has an open recess 12 formed at one end thereof. Ribbon insertion holes 13 and 14 are formed at the edge of the open recess 12 at one end of the cassette body 11. Reference numeral 15 is an ink ribbon, which is wound around a take-up reel and a feed reel (not shown) and accommodated in the inside of the cassette body 11. However, a part of the ink ribbon is provided in the ribbon insertion hole portion 13, 14 and is exposed in a bridge state on the open surface of the open recess 12. Reference numerals 16 and 16 denote ribbon regulating members, which are made of a material that can be elastically deformed in the vertical direction.
2 are respectively attached to the open end sides of the opposing inner side surfaces. Thus, when the cassette body 11 is in the non-mounted state, the ribbon regulating members 16 and 16 are located at the open surface portion in the open concave portion 12 as shown in FIGS. 1 to 3. The exposed portion 15a of the ink ribbon 15 exists corresponding to the back surface side of the exposed portion 15a.
Displacement of a into the open recess 12 is prevented.

In the above configuration, when the cassette body 11 is mounted on the carriage 3 of the printer body 1 shown in FIG.
Since the exposed portion 15a of the ink ribbon 15 is regulated by the ribbon regulating members 16 and 16 as described above, when the print head 3 is relatively inserted into the open concave portion 12, the ink ribbon 15 is exposed. No state is present at the position where the print head 3 is caught, and as the cassette body 11 is attached, the ribbon regulating members 16 and 16 are moved upward by the print head 3 as shown in FIGS. 4 and 5. Elastically deformed to, that is, the ribbon regulating members 16 and 16
Are displaced so as to allow the print head 3 to be inserted, and as a result, the exposed portion 15a of the ink ribbon 15 is moved to the print head 3
Is passed through the printing surface 3a side.

As described above, according to the present embodiment, when the cassette body 11 is not attached to the cassette body 11, the inward displacement of the exposed portion 15a of the ink ribbon 15 in the open recess 12 is prevented and the cassette body 11 is prevented from moving inward. Since the ribbon regulating members 16 and 16 which are displaced so as to allow the print head 3 to be inserted into the open concave portion 12 when mounted, are provided in the open concave portion 12 even when the ink ribbon 15 is loosened.
5 (exposed portion 15a) can be surely prevented from being displaced into the open recess 12, and the ribbon regulating members 16 and 1 can be prevented.
It is also possible to reliably prevent the insertion of the print head 3 into the open recess 12 by 6 and thus to reliably prevent the ink ribbon 15 from being caught in the print head 3 when the cassette body 11 is mounted. The ink ribbon 15 can be reliably positioned on the print surface 3a side of the print head 3, and as a whole, the cassette body 11 can be mounted in a really smooth manner. As a result, the trouble of remounting the cassette body 11 can be eliminated, and the damage to the ink ribbon 15 can be reliably prevented.

6 to 8 show a second embodiment of the present invention. In this second embodiment, one ribbon regulating member 17 is used.
However, unlike the first embodiment, the second embodiment is advantageous in that the number of parts can be reduced.

9 and 10 show a third embodiment of the present invention. In this third embodiment, the ribbon regulating members 18, 18 are attached to the cassette body 11 and the self-hinge portion 1.
The third embodiment differs from the first embodiment in that the ribbon restricting members 18, 18 are integrally formed via 9 and 19, so that the ribbon regulating members 18, 18 can be displaced by the self-hinge portion 19. There is an advantage that the ribbon regulating members 18 and 18 do not need to be made of an elastically deformable material, and the ribbon regulating members 18 and 18 can be formed at the same time when the cassette body 11 is molded, thus improving manufacturability. .

The present invention is not limited to the above embodiments,
Various modifications can be made without departing from the scope of the invention.

[Effects of the Invention] As is clear from the above description, the present invention can reliably prevent the ribbon in the open concave portion from being displaced into the open concave portion even when the ink ribbon is loosened. It is also possible to reliably prevent the regulation member from obstructing the insertion of the print head into the open recess, and thus to reliably prevent the ink ribbon from being caught in the print head when the cassette body is mounted. Can be reliably positioned on the printing surface side of the print head, and as a whole, the cassette body can be mounted really smoothly, and as a result, it is possible to eliminate the trouble of remounting the cassette body and damage the ink ribbon. It has excellent effects such as reliable prevention.

[Brief description of drawings]

1 to 5 show a first embodiment of the present invention.
Figure is a front view in the unmounted state, Figure 2 is a front view in the same state,
FIG. 3 is a vertical cross-sectional side view of the main part in the same state, FIG. 4 is a plan view in the mounted state, and FIG. 5 is a plan view of the main part in the same state.
6 to 8 show a second embodiment of the present invention,
FIG. 5 is a view corresponding to FIG. 5, FIG. 7 is a view corresponding to FIG. 3, FIG. 8 is a vertical side view of a main part in a mounted state, and FIGS. FIG. 5 is a view corresponding to FIG. 5 and an enlarged front view of a main part. 11 is a perspective view of a conventional ink ribbon cassette shown together with a printer, and FIG. 12 is a plan view of the conventional ink ribbon cassette. In the figure, 1 is a printer main body, 2 is a carriage, 3 is a print head, 11 is a cassette main body, 12 is an open concave portion, 15 is an ink ribbon, 15a is an exposed portion, 16 is a ribbon regulating member, 17 is a ribbon regulating member, 18 Is a ribbon regulating member.

Claims (1)

[Claims] 1. A cassette body is attachable to and detachable from a printer body having a print head, and an opening concave portion for inserting a print head is formed in the cassette body, and an ink ribbon is partially formed on an opening surface of the opening concave portion. In such a manner that the print head is inserted into the open recess at the time of mounting so that the exposed portion of the ink ribbon is passed to the print surface side of the print head, When the cassette body is not mounted, the exposed portion of the ink ribbon is prevented from inwardly displacing in the open concave portion, and when the cassette main body is mounted, the print head is displaced so as to be inserted into the open concave portion. An ink ribbon cassette, characterized in that a ribbon regulating member is provided.