JP2569680Y2 - 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 ink ribbon cassette used for a printer or the like.

[0002]

2. Description of the Related Art FIG. 7 shows a schematic configuration of a conventional ink ribbon cassette. In the drawing, reference numeral 2 denotes a cassette body, which accommodates an ink roller 3, an ink roll color 6, a transfer roller 7, an ink ribbon 9 and the like as an ink impregnated body.

[0003] The ink roller 3 is formed in a disk shape as a whole, and an inner diameter portion 4 of the ink roller 3
It is supported rotatably about a. The transfer roller 7 comes into contact with the outer peripheral surface 5 of the ink roller 3 and the ink ribbon 9 to transfer the ink of the ink roller 3 to the ink ribbon 9.
It is configured to be able to be transferred to. That is, the transfer roller 7
The ink is transferred to the transfer roller 7 from the portion of the outer peripheral surface 5 of the ink roller that is in pressure contact with the transfer roller 7 and further transferred to the ink ribbon 9.

[0004]

In the above-described ink ribbon cassette, if the pressing force of the transfer roller 7 against the ink roller 3 is too weak, sufficient ink transfer cannot be performed. Here, since the ink serves as a kind of lubricant, if the ink is insufficient, the ink ribbon 9 is deteriorated at an early stage, and the durability is reduced, and print blur occurs.

Therefore, in order to prevent such inconvenience,
It is conceivable to set the pressing force to be stronger from the beginning.
However, in this case, there is a possibility that the amount of ink transferred to the ink ribbon 9 is too large and ink stains are likely to occur.

In view of the above circumstances, an object of the present invention is to provide an ink ribbon cassette that can use the ink of the ink impregnated body without waste.

[0007]

According to a first aspect of the present invention, there is provided an ink ribbon cassette in which ink is impregnated and whose inner diameter is rotatably supported about an axis, and an outer peripheral surface of the ink impregnated body. An ink ribbon cassette having a transfer roller capable of transferring the ink of the ink-impregnated body to the ink ribbon by contacting the ink-impregnated body with the ink ribbon. Means are provided.

The ink ribbon cassette according to the second aspect of the present invention has an ink impregnated body impregnated with ink and having an inner diameter portion rotatably supported about an axis, and is in contact with the outer peripheral surface of the ink impregnated body and the ink ribbon. In an ink ribbon cassette having a transfer roller capable of transferring the ink of the ink impregnated body to the ink ribbon, a pressing means capable of pressing the vicinity of the inner diameter of the ink impregnated body in the axial direction is provided.

[0009]

According to the first aspect of the present invention, for example, when the printing density becomes low and the printing unevenness becomes conspicuous, the inner diameter portion of the ink impregnated body is pressed from the inside by using the diameter expanding means. Enlarge the inner diameter. As a result, the ink remaining near the inner diameter is extruded toward the outer peripheral surface. As a result, ink is supplied to the outer peripheral surface of the ink impregnated body, and the amount of ink transferred to the ink ribbon via the transfer roller is increased. Therefore, the ink impregnated in the ink impregnated body can be used without waste.

In the invention according to the second aspect of the present invention, by pressing the vicinity of the inner diameter of the ink impregnated body in the axial direction by using the pressing means, the ink remaining near the inner diameter is moved to the outer peripheral surface. It is pushed toward. Thereby, the ink is supplied to the outer peripheral surface of the ink impregnated body,
The amount of ink transferred to the ink ribbon via the transfer roller is increased. This allows the ink impregnated in the ink impregnated body to be used without waste.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. First Embodiment As shown in FIG. 1, an ink ribbon cassette according to a first embodiment of the present invention is characterized by a cassette body 2, an ink roller 3 as an ink impregnating body, an ink roll color 6, a transfer roller 7, an ink ribbon 9, and the present cassette. It is configured to include a diameter expanding means 10 which is a part. The same parts as those in FIG. 7 are denoted by the same reference numerals, and detailed description thereof will be omitted.

Here, the diameter expanding means 10 is a means for expanding the inner diameter by pressing the inner diameter portion (4) of the ink impregnated body (the ink roller 3 in this embodiment) from inside. In this embodiment, the diameter expanding means 10 includes a wedge-shaped pushing member 11,
And a notch 16 formed in the ink roll color 6. The pushing member 11 includes a pushing portion 12 having a sharp end, and a flange portion 13 formed above the pushing portion 12. On the other hand, as shown in FIG. 2, the cut portion 16 is formed on the shaft portion 6a of the ink roll collar 6 along the axis. The width of the notch 16 is formed to be smaller than the width of the pressing portion 12 of the pressing member 11. Therefore, when the push portion 12 of the push member 11 is inserted into the cut portion 16 of the ink roll collar 6, the shaft portion 6a of the collar 6 is spread as shown in FIG. Press to enlarge the inner diameter.

Next, the operation of this embodiment will be described.
When the printing density becomes low and the printing unevenness becomes conspicuous, the pressing portion 12 of the pressing member 11 is inserted into the cut portion 16 of the ink roll color 6. As a result, the shaft portion 6a of the ink roll collar 6 is expanded and presses the inner diameter portion 4 of the ink roller 3 from inside. As a result, the ink remaining near the inner diameter of the ink roller 3 is extruded toward the outer peripheral surface 5. As a result, ink is supplied to the outer peripheral surface 5 of the ink roller 3 and the transfer roller 7
, The amount of ink transferred to the ink ribbon 9 is increased. Therefore, the ink roller 3 can be used without waste.

(Second Embodiment) As shown in FIGS. 4 and 5, the ink ribbon cassette according to the present embodiment is formed so that the inner diameter portion 4 of the ink impregnated body (ink roller 3) can be pressed in the direction of the axis 3a. The cassette body 2, ink roller 3, ink roll color 6,
The ink ribbon 9 includes a pressing unit 20 which is a characteristic part of the cassette. The cassette body 2
Since the ink roller 3, the ink roll color 6, and the ink ribbon 9 have the same configuration as the corresponding components of the ink ribbon cassette of the first embodiment, detailed description thereof will be omitted.

Here, the pressing means 20 is formed so as to be able to press the vicinity of the inner diameter portion (3a) of the ink impregnated body (the ink roller 3 in this embodiment) in the direction of the axis 3a. In this embodiment, the pressing means 20 includes the pressing spring 21 and the pressing member 2.
5 is comprised. The pressing spring 21 is formed of a truncated conical thin spring member having an upper part 22 and a bottom part 23 opened. On the other hand, the pressing member 25 is formed of an insertion portion 26 that can be inserted into the shaft portion 6 a of the ink roll collar 6 and a flange portion 27 that can press the pressing spring 21 from above.

Next, the operation of the second embodiment will be described.

By pressing the flange portion 27 of the pressing member 25 more strongly, as shown in FIG. 6, the back and front of the pressing spring 21 are reversed, and the upper portion 22 comes into contact with the upper portion of the ink roller 3 so that the pressing is performed. The spring 21 presses the vicinity of the inner diameter portion 4 of the ink roller 3 in the direction of the axis 3a due to its elasticity. Thereby, the ink remaining near the inner diameter portion 4 is pressed and pushed toward the outer peripheral surface 5. As a result, ink is supplied to the outer peripheral surface 5 of the ink roller 3, and the amount of ink transferred to the ink ribbon 9 via the transfer roller 7 is increased. Therefore, the ink impregnated in the ink roller 3 can be used without waste.

[0018]

According to the first aspect of the present invention, the ink impregnated body is impregnated with the ink impregnated body because the diameter of the inner surface is increased by pressing the inner diameter of the ink impregnated body from the inside. Ink can be used without waste.

According to the second aspect of the present invention, since the pressing means capable of pressing the vicinity of the inner diameter of the ink impregnated body in the axial direction is provided, the ink impregnated in the ink impregnated body can be used without waste. .

[Brief description of the drawings]

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

FIG. 2 is a perspective view for explaining an operation of expanding the inner diameter portion of the ink roller of the diameter expanding unit of the first embodiment.

FIG. 3 is a perspective view for explaining the operation of expanding the inner diameter portion of the ink roller of the diameter expanding unit of the first embodiment.

FIG. 4 is a partially cutaway perspective view showing a second embodiment of the present invention.

FIG. 5 is a diagram illustrating a positional relationship among a pressing spring, a pressing member, and an ink roller according to a second embodiment.

FIG. 6 is a diagram illustrating a state in which the vicinity of an inner diameter portion of an ink roller according to a second embodiment is pressed in an axial direction by cooperation of a pressing spring and a pressing member.

FIG. 7 is a partially cutaway perspective view showing a conventional ink ribbon cassette.

[Explanation of symbols]

 REFERENCE SIGNS LIST 3 ink roller (ink-impregnated body) 4 inner diameter portion 5 outer peripheral surface 7 transfer roller 9 ink ribbon 10 diameter expanding means 20 pressing means

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-6-115235 (JP, A) JP-A-63-84968 (JP, A) JP-A-63-84969 (JP, A) 39761 (JP, U)

Claims (2)

(57) [Scope of request for utility model registration] 1. An ink impregnated body impregnated with ink and having an inner diameter portion rotatably supported about an axis, and an ink impregnated body that is in contact with an outer peripheral surface of the ink impregnated body and an ink ribbon to be in contact with the ink ribbon. An ink ribbon cassette, comprising: a transfer roller capable of transferring the ink to an ink impregnated body, wherein an inner diameter portion of the ink impregnated body is pressed from inside to increase an inner diameter dimension. 2. An ink impregnated body impregnated with ink and having an inner diameter portion rotatably supported around an axis, and an ink impregnated body which is in contact with an outer peripheral surface of the ink impregnated body and an ink ribbon and is supplied with the ink. An ink ribbon cassette comprising: a transfer roller capable of transferring the ink to an ink impregnated body;