JPH0446933Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention is designed to prevent a pancake-shaped ink ribbon stored in a cartridge case from shifting in the direction of the rotational axis due to vibrations during transportation. , or
The present invention relates to an ink ribbon cartridge developed to prevent the ink ribbon from being unintentionally fed out due to the rotation of the pancake-shaped ink ribbon. More specifically, a pancake-shaped ink ribbon is rotatably stored in a cartridge case, and a side surface of the pancake-shaped ink ribbon is placed between the pancake-shaped ink ribbon and the inner surface of the cartridge case. Ribbon stopper that elastically presses
The present invention relates to an ink ribbon cartridge which is press-fitted to be detachably inserted through an opening formed in the cartridge case.

[Conventional technology]

As this kind of ink ribbon cartridge,
As shown in FIGS. 15 and 16, the ribbon stopper 50 is composed of an elastic thin plate bent into a flat W shape, and includes the side surface of the pancake-shaped ink ribbon R and the inner surface of the cartridge case 1. The central mountain portion 50a of the ribbon stopper 50 is exposed to the outside through the opening 6 of the cartridge case 1 when the ribbon stopper 50 is press-fitted between the ribbon stopper 50 and the ribbon stopper 50.
In addition, a device was developed in which a pair of knob pieces 50b that were in contact with the outer surface of the cartridge case 1 were formed by stamping (Japanese Utility Model Publication No. 59-131852).

[Problem that the invention attempts to solve]

In this conventional ink ribbon cartridge, when the ribbon stopper 50 is press-fitted between one side of the pancake-shaped ink ribbon R and the inner surface of the cartridge case 1, the left and right sides of the ribbon stopper 50 are The troughs 50c are in contact with one side of the pancake-shaped ink ribbon R, and both side portions 50d of each trough 50c are in contact with the inner surface of the cartridge case 1. Then, due to the elastic repulsion force with the point of contact with the inner surface of the cartridge case 1 as a reaction force, the other side surface of the pancake-shaped ink ribbon R is elastically applied to the inner surface of the cartridge case 1 that faces it. It is possible to reliably prevent the pancake-shaped ink ribbon R from shifting and rotating due to vibrations during transportation and from rotating when the ribbon is fed out.

However, the left and right valleys 50c of the ribbon stopper 50 and the pancake-shaped ink ribbon R
Since the pancake-shaped ink ribbon R is in line contact with one side surface, an elastic repulsion force concentrates on the line contact portion of the one side surface of the pancake-shaped ink ribbon R, and the side edge of the ink ribbon R may break.

The purpose of this invention is to provide an ink that can reliably prevent the pancake-shaped ink ribbon from shifting and rotating due to vibrations during transportation, while suppressing the breakage of the sides of the pancake-shaped ink ribbon. The main point is to provide a ribbon cartridge.

[Means for solving problems]

In the ink ribbon cartridge according to the present invention, the ribbon stopper is constituted by an elastic holding part that can be elastically deformed into a flat cylindrical shape or a substantially flat cylindrical shape, and a grip part, and the elastic holding part is held in a natural state as described above. It is characterized by having a width larger than the gap between the side surface of the pancake-shaped ink ribbon and the inner surface of the cartridge case, and its functions and effects are as follows.

[Effect]

When the elastic holding part of the ribbon stopper is press-fitted between one side of the pancake-shaped ink ribbon and the inner surface of the cartridge case opposite thereto through the opening of the cartridge case, this elastic holding part is elastically deformed into a flat cylindrical shape or almost a flat cylindrical shape, and comes into contact with one side surface of the pancake-shaped ink ribbon and the inner surface of the cartridge case over a wide area, respectively. Therefore, even if strong contact friction is created between the ribbon stopper and one side of the pancake-shaped ink ribbon to prevent the ribbon stopper from being pulled out unexpectedly, the contact pressure per unit area becomes small. Then, due to the elastic repulsion force in the short diameter direction of this elastic presser, the other side surface of the pancake-shaped ink ribbon is elastically pressed against the inner surface of the cartridge case that faces it, and this pancake-shaped ink ribbon is Both misalignment in the direction of the rotational axis and rotation of the ribbon from being fed out are prevented.

Furthermore, when starting to use the ink ribbon cartridge, by grasping and pulling the grip part of the ribbon stopper with your fingers, the gap between one side part of the pancake-shaped ink ribbon and the inner surface of the cartridge case is adjusted. The elastic presser press-fitted in the opening can be easily pulled out to the outside through the opening.

[Effect of idea]

As a result, not only can the ribbon stopper be quickly and easily attached and detached, but also the elastic pressing part is elastically deformed into a flat cylindrical shape or almost a flat cylindrical shape when the ribbon stopper is press-fitted. ,
Since it contacts the pancake-shaped ink ribbon over a wide area, the surface pressure per unit area acting on the side surface of the pancake-shaped ink ribbon can be made as small as possible compared to the conventional method. Therefore, while suppressing breakage of the side portions of the pancake-shaped ink ribbon, it was possible to reliably prevent the pancake-shaped ink ribbon from shifting and rotating due to vibrations during transportation. .

〔Example〕

A first embodiment of the present invention will be described below with reference to FIGS. 1 to 4.

Reference numeral 1 denotes a cartridge case made of ABS resin that houses the ink ribbon R, and is composed of a case body 1A that opens on one side and a lid 1B that closes the opening of the case body 1A. Across the bottom plate 1a and lid 1B of the case body 1A, there is a feeding shaft 2 that feeds out and rotatably supports the pancake-shaped ink ribbon R, a winding shaft 3 that winds up the used ink ribbon R, and A plurality of guide rollers 5 are rotatably installed to guide the running of the ink ribbon R fed from the feed shaft 2 through the printing head insertion recess 4 to the take-up shaft 3 side.

Further, an elongated opening 6 extending along the radial direction of the pancake-shaped ink ribbon R is formed at a location corresponding to the pancake-shaped ink ribbon R of the lid 1B.

A ribbon stopper 7 is detachably press-fitted through the opening 6 between one side of the pancake-shaped ink ribbon R and the inner surface of the lid 1B opposite thereto. This ribbon stopper 7
includes an elastic presser portion 7A configured to have a width W ₂ smaller than the maximum opening width W ₁ of the opening 6 and elastically deformable into a flat cylindrical shape or a substantially flat cylindrical shape;
The grip portion 7B has a width W ₃ larger than the maximum opening width W ₁ of the grip portion 7B.

As shown in FIG. 4, the elastic holding part 7A and the grip part 7B are made of a T-shaped resin film (an example of an elastic plate), for example, PET with a thickness of 0.2 mm. It is integrally constructed from film.

Furthermore, as shown in FIG. 3, the elastic holding portion 7A is constructed by folding an elongated portion of a T-shaped resin film into three approximately flat cylindrical shapes, and has a width W in the minor axis direction in its natural state. ₄ is configured to be larger than the gap S between one side of the pancake-shaped ink ribbon R and the inner surface of the lid 1B.

Then, the elastic pressing portion 7A of the ribbon stopper 7 configured as described above is attached to the cartridge case 1.
The pancake-shaped ink ribbon R is passed through the opening 6 of the
When press-fitted between one side surface and the inner surface of the lid 1B opposite thereto, this elastic presser section 7A is elastically deformed into a substantially flat cylindrical shape, and the one side surface of the pancake-shaped ink ribbon R and It contacts the inner surface of the lid 1B over a wide area. The other side surface of the pancake-shaped ink ribbon R is elastically pressed against the inner surface of the bottom plate 1a of the case main body 1A opposite thereto due to the elastic repulsion force in the short diameter direction by the elastic holding portion 7A. Both the misalignment of the pancake-shaped ink ribbon R in the rotation axis direction and the ribbon feeding rotation are prevented.

When starting to use the ink ribbon cartridge, the pancake-shaped ink ribbon R is held in place by grasping and pulling the grip portion 7B of the ribbon stopper 7 that protrudes from the opening 6 to the outside. The elastic presser portion 7A press-fitted between the side surface portion and the inner surface of the lid 1B can be easily extracted to the outside through the opening 6.

Next, another example will be described.

[] Second Embodiment As shown in FIG. 5, the ribbon stopper 7
The elastic presser portion 7A may be constructed by folding an elongated portion of a resin film in half into a substantially flat cylindrical shape.

Further, the elastic presser portion may be constructed by bending the elongated portion of the resin film into four or more pieces.

[] Third Embodiment As shown in FIG. 6, the ribbon stopper 7
The elastic holding part 7A and the grip part 7B may be manufactured separately, and then both 7A and 7B may be fixed together by adhesive or heat fusion.

In this embodiment, the grip portion 7B may be made of a rigid material.

[] Fourth Embodiment As shown in FIGS. 7 and 8, the elastic pressing portion 7A and the gripping portion 7 of the ribbon stopper 7
A pair of left and right protrusions 8, 8 are formed between the lid 1B and the lid 1B, and are capable of being engaged with the periphery of the opening 6 on the inner surface of the lid 1B and elastically deformable into a position that allows passage through the opening 6. You may.

In the case of this embodiment, while allowing the ribbon stopper 7 to be attached and detached, the peripheral edge portion of the opening 6 is sandwiched between the protrusions 8, 8 and the grip portion 7B during press-fitting. It is possible to reliably prevent the ribbon stopper 7 from moving, especially from coming off.

[] Fifth Embodiment As shown in FIGS. 9 and 10, near the left and right sides of the elastic pressing portion 7A of the ribbon stopper 7,
Cuts 7a and 7b parallel to each of these sides are formed from the tip side, and the left and right elongated portions 7b and 7b separated by the cuts are placed in a position approximately along the center line in the long diameter direction of the elastic holding portion 7A. and said grip part 7
It may also be implemented by inserting and locking into the periphery of the cuts 7c and 7c formed in B to restrict elastic deformation in the long diameter direction of the elastic holding portion 7A when the ribbon stopper 7 is press-fitted. .

In the case of this embodiment, the elastic repulsion force in the short diameter direction of the elastic holding portion 7A is large, and the contact with the inner surface of the case, which is formed as smoothly as possible in consideration of contact with the ink ribbon R during use, is increased. This alone can effectively suppress the movement of the ribbon stopper 7.

In this embodiment, the elongated portions 7a that restrict the elongation in the longitudinal direction of the elastic presser portion 7A are formed on both sides of the elastic presser portion 7A. It may be formed at the center in the direction.

[Sixth Embodiment] As shown in FIG. 11, the elastic pressing portion 7A of the ribbon stopper 7 may be constructed by cutting a flat cylindrical elastic pipe into rings.

[Seventh Embodiment] As shown in FIG. 12, the elastic pressing portion 7A of the ribbon stopper 7 may be constructed by cutting a cylindrical elastic pipe into rings.

[Eighth Embodiment] As shown in FIG. 13, the left and right side portions 7d, 7d of the elastic presser portion 7A of the ribbon stopper 7 may be bent inward in the radial direction.

In the case of this embodiment, since the left and right side portions 7d and 7d of the elastic presser portion 7A are cubic curved surfaces, when the ribbon stopper 7 is press-fitted, the elastic presser portion 7A
It is possible to suppress the concave deformation of the contact surface at the center in the long diameter direction inward in the short diameter direction, and the entire contact surface of the elastic holding portion 7A is placed on one side of the pancake-shaped ink ribbon R and the inner surface of the case. Can be contacted evenly.

[] In the above-described embodiment, the ribbon stopper 7 has a T-shape, but is not limited to this. For example, the ribbon stopper 7 may have a T-shape. may be configured. Incidentally, the ribbon stoppers 7 shown in FIGS. 14A, 14C, 2D, and 14E have the advantage of increasing the yield during blanking, as shown by the imaginary lines.

[] Materials for the ribbon stopper 7 include polyester, vinyl chloride, nylon, polypropylene, ABS resin film, acrylic resin,
Examples include leaf springs, shape memory alloys, and high-density paper.

[] The ribbon stopper 7 of the present invention can also be applied to ink ribbon cartridges other than those described in the above embodiments.

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]

1 to 4 show a first embodiment of an ink ribbon cartridge according to the present invention, FIG. 1 is a sectional view of the main parts, FIG. 2 is a front view of the entire cartridge,
FIG. 3 is a perspective view of the ribbon stopper, and FIG. 4 is a plan view showing the evolved shape of the ribbon stopper.
FIG. 5 is a perspective view of a ribbon stopper showing a second embodiment, FIG. 6 is a perspective view of a ribbon stopper showing a third embodiment, and FIGS. 7 and 8 are a perspective view of a ribbon stopper showing a fourth embodiment. 9 and 10 are perspective views and cross-sectional views of the ribbon stopper showing the fifth embodiment, and FIG. 11 is a perspective view of the ribbon stopper showing the sixth embodiment. Figure 12 is the 7th
A perspective view of a ribbon stopper showing an embodiment, No. 13
The figure is a partially cutaway perspective view of the ribbon stopper shown in the eighth embodiment, FIGS.
FIG. 6 is a sectional view of essential parts of a conventional ink ribbon cartridge and a perspective view of a ribbon stopper. R... Ink ribbon, 1... Cartridge case, 6... Opening, 7... Ribbon stopper, 7
A...Elastic presser part, 7B...Grip part, 8...Protrusion part, S...Gap, _W1 ...Maximum opening width, _W3 , _W4
……width.

Claims (1)

[Claims for Utility Model Registration] 1. A pancake-shaped ink ribbon R is rotatably stored in a cartridge case 1, and between the pancake-shaped ink ribbon R and the inner surface of the cartridge case 1, An ink ribbon cartridge in which a ribbon stopper 7 for elastically pressing the side surface of the pancake-shaped ink ribbon R is removably press-fitted through an opening 6 formed in the cartridge case 1. The ribbon stopper 7 is composed of an elastic holding part 7A that can be elastically deformed into a flat cylindrical shape or a substantially flat cylindrical shape, and a grip part 7B, and the elastic holding part 7A is configured to hold the pancake-shaped ink ribbon in a natural state. The ink ribbon cartridge has a width _W4 larger than the gap S between the side surface of R and the inner surface of the cartridge case 1. 2 The elastic presser portion 7A is located at its left and right side portions 7.
d and 7d are bent inward in the radial direction. 3 The grip portion 7B has the maximum opening width of the opening 6
The ink ribbon cartridge according to claim ₁ , which is configured to have a width _W3 larger than W1. 4 Between the elastic presser part 7A and the grip part 7B, there is a part that can be locked to the peripheral edge of the opening 6 on the inner surface of the cartridge case 1, and that
The ink ribbon cartridge according to any one of claims 1 to 3, wherein the ink ribbon cartridge is provided with a protrusion 8 that can be elastically deformed into a position that allows it to pass through the ink ribbon cartridge. 5. The ink ribbon cartridge according to any one of claims 1 to 4, wherein the elastic presser portion 7A and the grip portion 7B are integrally formed. 6. The ink ribbon cartridge according to any one of claims 1 to 5, wherein the elastic presser portion 7A is an elastic plate-shaped body wound into a cylindrical shape. 7. The ink ribbon cartridge as set forth in any one of claims 1 to 5, wherein the elastic presser portion 7A is an elastic pipe cut into rings.