JPH0534946Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a ribbon drive structure for an ink ribbon cartridge.

[Conventional technology]

As shown in FIG. 6, the ink ribbon cartridge includes a body 11 of a main case 1 made of synthetic resin, on which a pair of left and right ribbon guide arms are integrally formed;
The main component is a lid part 12 of the case 1 made of synthetic resin that closes the upper opening of the body part 11, and the ink ribbon R stretched between the pair of arms is attached to an impact dot head (not shown). ) so that it can be stamped. The case 1 is formed with a horizontally long ribbon storage section 1C that stores the main part of the ink ribbon R in a folded state.
A pair of feed rolls 4 and 5 are disposed facing each other and a driven roll 4 which cooperates as the drive roll 5 to draw the ink ribbon R into the ribbon storage section 1C in a sandwiched state.

Further, as shown in FIG. 5, an elastic member 6 made of a compression coil spring is interposed between the support member 9 of the driven roll 4 and the body 11 of the case 1. , the driven roll 4
The ink ribbon R is held elastically between the drive roll 5 and the drive roll 5.

The support member 9 is provided with a circular convex portion 9b as a positioning portion A, into which the end portion of the elastic member 6 can be externally fitted in order to position the elastic member 6. By storing both 9 and 6 in a predetermined position in the case 1 with one end of the member 6 engaged, the elastic member 6
positioning is now being carried out.

Note that the positioning portion A of the elastic member 6 may be configured by forming a circular recess (not shown) in the support member 9 into which the end of the elastic member 6 can be fitted; For example, Utsukai Showa 55-107358
(Refer to the publication) In any case, the positioning part A
was provided only on the support member 9 side.

[The problem that the idea attempts to solve]

In the ribbon drive structure of such a conventional ink ribbon cartridge, the positioning part A is provided on the support member 9 side, but not on the case 1 side, so that when assembling the ink ribbon cartridge, Even if the elastic member 6 is positioned at a predetermined position in the case 1 by the positioning portion A, the position of the end of the elastic member 6 on the case 1 side may shift when the ink ribbon cartridge is used, and the elastic member 6 may be displaced. There is a problem that the member 6 may not function properly.

Furthermore, when assembling the ink ribbon cartridge, it is necessary to insert the elastic member 6 into the case 1 with its end engaged with the positioning portion A. There is a problem in that it is not only necessary to simply push in the insertion direction, but also to forcefully engage the end portion with the positioning portion A after pushing in, which becomes very troublesome. This problem becomes particularly noticeable when the positioning portion A is a circular convex portion 9b formed on the support member 9 as shown in the figure.

The present invention was devised by paying attention to the above-mentioned circumstances, and allows the elastic member to be easily installed into the case when assembling the ink ribbon cartridge, and also prevents the elastic member from being misaligned when the ink ribbon cartridge is used. It is an object of the present invention to avoid the problem of the elastic member not functioning properly.

[Means to solve the problem]

The characteristic configuration of the present invention for achieving the above object is that a pair of feed rolls that sandwich the ink ribbon are provided in the middle of the ribbon traveling path in the case via a support member, and the rotation of these feed rolls causes the ink ribbon to be The ink ribbon is elastically held by the feed rolls by interposing an elastic member between at least one of the support members of the feed rolls and the case. A ribbon driving structure of an ink ribbon cartridge configured to perform the above-mentioned operation, wherein positioning portions for positioning the elastic member with respect to the support member and the case are provided on both the support member side and the case side, A guide that allows the elastic member to be attached to the positioning part in an elastically deformed state by moving the elastic member fitted between the case and the support member toward the positioning part in the case and/or the support member. This structure provides the following effects.

[Effect]

Since the positioning portion is provided on both the support member side and the case side, the elastic member is positioned on both the support member side and the case side, and as a result, the elastic member remains stable even when the ink ribbon cartridge is used. Its position does not shift.

Further, when the elastic member is attached, due to the presence of the guide section, the elastic member fitted between the case and the support member is simply pushed toward the positioning section, and the elastic member is attached to the positioning section in an elastically deformed state.

[Effect of idea]

Therefore, the elastic member can be easily installed into the case when assembling the ink ribbon cartridge, and it is possible to avoid the problem of the elastic member being misaligned and not functioning properly when the ink ribbon cartridge is used. .

〔Example〕

Hereinafter, the present invention will be explained based on drawings showing embodiments thereof. In addition, in the drawings, parts indicated by the same reference numerals as those in FIGS. 5 and 6 indicate parts that are equivalent to the conventional ones.

As shown in FIG. 2, the ink ribbon cartridge according to the present invention includes a body 11 of a case 1 made of synthetic resin in which a pair of left and right ribbon guide arms 1A and 1B are integrally formed, and a body 11 of a case 1 made of synthetic resin. The main component is a lid 12 of the case 1 made of synthetic resin that closes the upper opening, and the ink ribbon R stretched between the pair of arms 1A and 1B is placed on an impact dot head (not shown). It is configured so that it can be stamped. The case 1 is formed with a horizontally long ribbon storage section 1C that stores the main part of the ink ribbon R in a folded state. On the entrance side of the ribbon storage section 1C, there is a drive roll 4 and a drive roll 4. A pair of feed rolls 4 and 5 are disposed facing each other and a driven roll 5 that pulls the ink ribbon R into the ribbon storage portion 1C in a sandwiched state.

Further, as shown in FIG. 1, an elastic member 6 made of a compression coil spring is interposed between the support member 9 of the driven roll 4 and the body 11 of the case 1. , the driven roll 4
The ink ribbon R is held elastically between the drive roll 5 and the drive roll 5.

Further, a circular recess 9a into which one end of the elastic member 6 can be fitted is provided at an appropriate portion of the support member 9 as a positioning portion A for positioning the one end with respect to the support member 9 and the case 1. There is. On the open side of the support member 9 (in other words, on the side of the support member 9 disposed inside the body 11 on which the lid portion 12 is attached),
A guide portion B that guides one end of the elastic member 6 when the elastic member 6 is inserted so that the one end fits into the circular recess 9a, specifically, a size corresponding to the outer diameter of the elastic member 6; A guide portion B is formed which has a groove width of 1 and has a tapered surface with a deeper groove depth on the open side as a groove bottom surface.

In addition, a stepped portion 11a is provided at an appropriate portion of the body portion 11 of the case 1 on the open side of the body portion 11 (in other words, the other end portion of the elastic member 6 can be fitted in half). The body portion 11 is provided so that the side on which the lid portion 12 is attached from above is a lower level. On the other hand, an elastic member pressing portion 12a is provided on the inner surface side of the lid portion 12 that is attached from above the body portion 11.
is formed to protrude so that its tip can press the remaining portion of the other end of the elastic member 6. A positioning portion A for positioning the other end of the elastic member 6 with respect to the support member 9 and the case 1 is constituted by the combination of the stepped portion 11a and the elastic member holding portion 12a.

In the ribbon drive structure of such an ink ribbon cartridge, since the positioning part A is provided on both the supporting member 9 side and the case 1 side, both ends of the elastic member 6 are provided in the positioning part A. A supports the support member 9 as well as the case 1.
As a result, the elastic member 6
The ink ribbon cartridge does not shift in position relative to the support member 9 and the case 1 even when the ink ribbon cartridge is used.

Furthermore, when inserting the elastic member 6, the lid portion 12 is kept open. By simply pushing the elastic member 6 in the loading direction along the guide portion B, the elastic member 6 is guided while spontaneously being elastically deformed, and reaches the positioning portion A, that is, the stepped portion 11a and the circular recess 9a. The elastic member 6 spontaneously recovers elastically, and one end of the elastic member 6 easily fits into and engages the circular recess 9a, which is the positioning part A. Then, by attaching the lid part 12, the other end of the elastic member 6 can be easily accommodated in the positioning part A.

[Another example]

As shown in FIG. 3, an embodiment may be considered in which one of the positioning parts A is formed in the body part 11 of the case 1, and the other part is formed in the support member 9.

Further, as shown in FIG. 4, one of the positioning parts A includes a stepped part 11a formed at an appropriate part of the body part 11 of the case 1 and an elastic member formed protruding from the inner surface of the lid part 12 of the case 1. The other side of the positioning part A is formed in combination with the holding part 12a, and the stepped part 9c is formed at an appropriate part of the supporting member 9, and the elastic member holding part is formed on the inner surface side of the lid part 12 of the case 1. An embodiment may also be considered in which the elastic member holding portion 12b is combined with the elastic member holding portion 12b which is formed to protrude separately from the holding portion 12a. In the case of this embodiment, consideration must be given to the protruding position of the separate elastic member holding portion 12b so that the support member 9 can move in accordance with the elastic deformation of the elastic member 6.

Note that although reference numerals are written in the claims section of the utility model registration for convenience of comparison with the drawings, the present invention is not limited to the structure of the attached drawings by such entry.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional side view showing a main part of an embodiment of the ribbon drive structure of an ink ribbon cartridge according to the present invention, FIG. 2 is a lateral plan view of the ink ribbon cartridge, and FIGS. 3 and 4 are 1 is a diagram corresponding to another embodiment, FIG. 5 is a longitudinal cross-sectional side view showing the main parts of the ribbon drive structure of a conventional ink ribbon cartridge, and FIG. 6 is a cross-sectional view showing the main parts of the conventional ink ribbon cartridge. FIG. DESCRIPTION OF SYMBOLS 1... Case, 6... Elastic member, 9a... Recessed part, 4... Feed roll (driven roll), 5...
...Feed roll (drive roll), 9, 10...
Support member, 11...Body part, 11a...Step part, 1
2... Lid part, 12a... Elastic member holding part, A...
Positioning section, B... Guide section, R... Ink ribbon.

Claims (1)

[Claims for Utility Model Registration] 1. A pair of feed rolls 4, 5 that sandwich the ink ribbon R are provided in the middle of the ribbon running path in the case 1 via support members 9, 10, and these feed rolls 4, 5 are Support members 9 and 10 for both feed rolls 4 and 5 are configured to apply running force to the ink ribbon R by rotation.
at least one support member 9 and the case 1
A ribbon drive structure for an ink ribbon cartridge configured to elastically sandwich the ink ribbon R between the feed rolls 4 and 5 by interposing an elastic member 6 between the feed rolls 4 and 5. Positioning portions A for positioning the elastic member 6 with respect to the support member 9 and the case 1 are provided on both the support member 9 side and the case 1 side, By moving the elastic member 6 fitted between the support member 1 and the support member 9 toward the positioning part A, a guide part B is formed which allows the elastic member 6 to be attached to the positioning part A in an elastically deformed state. Ribbon drive structure of ink ribbon cartridge. 2. By interposing the elastic member 6 between the supporting member 9 of one of the driven rolls 4 of the feed rolls 4 and 5 and the case 1, the driven roll 4 and the other of the feed rolls 4 and 5 2. A ribbon drive structure for an ink ribbon cartridge according to claim 1, wherein the ink ribbon R is elastically held between the drive rolls 5 and the ink ribbon R. 3 The positioning part A includes a recess 9a formed by recessing a part of the support member 9, and a step part 1 formed in a part of the body 11 of the case 1.
2. The ribbon drive structure for an ink ribbon cartridge according to claim 1, wherein said member 1a is combined with an elastic member holding portion 12a projected from the inner surface of said lid portion 12 of said case 1.