JPH0593844U - Ribbon cassette for printer - Google Patents

Abstract

(57) [Summary] [Object] To provide a ribbon cassette for a printer in which the number of cassette assembling steps is reduced, the cost is reduced, and the ribbon can be easily replaced. A reversing member is formed in the shape of a cantilever extending from the inner surface of the inner side wall of one arm of the cassette toward the other side wall, and a ribbon running gap is provided between the reversing member and the bottom of the arm. And a ribbon exchange gap continuous with the ribbon running gap is formed between the tip of the reversing member and the outer wall.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a ribbon cassette for a printer, which accommodates an endless ribbon and is provided with a reversing member for reversing the ribbon during traveling to extend its life.

[0001]

[Prior Art]

 A conventional ribbon cassette for a printer will be described with reference to FIGS. 1 and 2. FIG. 1 is a plan view of the ribbon cassette with the cover removed. Reference numeral 1 denotes a cassette main body that constitutes a cassette together with a cover. A housing portion 11 that houses the ribbon in a meandering shape, and a hollow portion that extends like arms that holds the ribbon from both sides of the housing portion and has its tip portions spaced apart and facing each other. The ribbon 2 having the arm portions 12 and 13 and accommodated in the accommodating portion 11 passes from the outlet 14 of the accommodating portion through the inside of the one arm portion 12, and between the tip portions of the both arm portions of the printer (not shown). It is exposed to the outside for insertion between the print head and the platen, is passed through the other arm 13, and is sandwiched between the feed roller 15 and the pressure roller 16 arranged in the housing 11. It is loaded so as to be returned to the accommodation portion 11 again. Reference numeral 17 is a coil spring for urging the pressure roller 16. Then, in order to extend the life of the ribbon, the reversing member 18 for reversing the front and back of the ribbon during traveling is formed by bending a thin metal plate as shown in FIG. It uses parts. The reversing member 18 has a contact portion 18a for laterally overturning the ribbon 2 pulled out from the outlet 14 of the ribbon accommodating portion 11 of the cassette body 1 and a mounting portion 18b for mounting the reversing member on the cassette 1. Since the contact portion 18a is formed with a length that traverses the entire width of the guide groove of the one arm portion 12, in order to enable replacement with a new ribbon when the life of the ribbon expires, the attachment portion 18b is bent in a hat shape, and the bent portion 18c is inserted into a slit formed in the outer wall 122 of the arm portion 12 of the cassette body, and the reversing member 18 is detachably attached.

[0002]

Therefore, conventionally, it is necessary to make the reversing member 18 as a component separate from the cassette body 1, and since a large number of components are supplied and time is required when the cassette is assembled, the ribbon cassette This causes a cost increase, and it is necessary to attach and detach the reversing member every time the ribbon is replaced, which is troublesome.

Therefore, in the present invention, by devising the mounting structure of the reversing member, the number of parts and the number of assembling steps of the cassette can be reduced, and the cost can be reduced, and the ribbon can be replaced without detaching the parts. An object of the present invention is to provide a ribbon cassette for a printer that can be easily performed.

[0004]

[Means for solving the problem]

 In order to solve the above problems, in the ribbon cassette according to the present invention, the reversing member is formed in a cantilevered wall shape extending from the inner surface of the inner wall of one arm of the cassette body toward the other side wall. A ribbon running gap is formed between the reversing member and the bottom of the arm, and a ribbon exchanging gap is formed between the tip end of the reversing member and the outer wall so as to connect to the ribbon running gap. Is characterized by.

[0005]

[Action]

 The ribbon pulled out from the outlet of the ribbon accommodating portion of the cassette main body passes through the ribbon traveling gap between the reversing member and the bottom surface of the arm and travels toward the tip of the arm. The ribbon is reversed while passing through the ribbon running gap and reaching the tip of the arm. When the cassette is used after being attached to the printing unit, the ribbon is tensioned by the pulling force of the feed roller and the pressure roller. Therefore, the ribbon will not come off the ribbon replacement gap. Remove the cover of the cassette removed from the printing section from the cassette body, pull out the ribbon on one arm to loosen it, and then pull it out from the ribbon replacement gap. The ribbon can be exchanged by reversing and inserting the reversing part from the ribbon exchanging gap into the ribbon traveling gap.

[0006]

【Example】

 Next, an embodiment of the present invention will be described with reference to the drawings. 3 is a plan view corresponding to FIG. 1, FIG. 4 is a sectional view taken along the line AA of FIG. 3, and FIG. 5 is a sectional view taken along the line BB of FIG. The same reference numerals are used for the same members as the conventional ones.

In the present invention, a cantilevered wall-shaped member extending from the inner wall surface of the inner wall 121 of the arm portion 12 near the outlet 14 of the ribbon housing portion 11 of the cassette body 1 toward the inner wall surface of the outer wall 122. The reversing member 19 is integrally formed with the cassette body 1. A ribbon running gap 20 is formed between the lower end of the reversing member and the bottom wall 123 of the arm 12 so that the horizontally rolled ribbon 2 can pass therethrough. Reference numeral 21 is a hole formed after removing the mold for the reversal member. While the ribbon 2 drawn out from the outlet 14 of the cassette body 1 passes through the traveling gap 20, the ribbon is laid over and the upper end and the lower end of the ribbon move up and down while the ribbon reaches the tip of the arm. Flipped. As shown in FIG. 4, the lower end of the reversing member 19 is rounded so as not to apply unnecessary resistance or friction to the ribbon 2.

Due to the above-mentioned structure, after the rollers 15 and 16 and the coil spring 17 are mounted on the cassette body 1, the new ribbon 2 is loaded, and when the ribbon cassette is assembled, the cassette with the cover removed. The ribbon 2 folded in a meandering state is accommodated in the ribbon accommodating portion 11 of the main body 1, a part of the ribbon is extended into a semicircular shape, and the extended portion is inserted into both arm portions 12 and 13. At the same time, expose the ribbon to the outside between the ends of both arms, flip a part of the ribbon with your fingertips, insert it from the ribbon replacement gap 22, and move it to the ribbon running gap 20 to move the ribbon. It can be loaded and the cover is attached to complete the assembly of the ribbon cassette.

When the life of the ribbon expires, the cover is similarly removed, the ribbon is moved laterally from the ribbon running gap 20, and the ribbon is pulled out from the ribbon replacing gap 22 to remove the old ribbon. It can be taken out and replaced with a new ribbon. That is, the ribbon can be replaced without removing the reversing member as in the conventional case.

[0010]

[Effect of the device]

 As described above, according to the present invention, since the reversing member is integrally formed with the cassette body, the number of parts when assembling the ribbon cassette is reduced, so that the cost of the ribbon cassette is reduced. Since the formed ribbon running gap is communicated with the outside by the ribbon changing gap, it is not necessary to attach and detach the reversing member each time the ribbon is changed, so that the ribbon changing operation does not take much time.

[Brief description of drawings]

FIG. 1 is a plan view showing a conventional ribbon cassette and a mounting state of a reversing member thereof.

FIG. 2 is a perspective view showing only a reversing member.

FIG. 3 is a plan view showing a ribbon cassette according to the present invention and a mounting state of a reversing member thereof.

4 is a sectional view taken along the line AA of FIG.

5 is a sectional view taken along line BB of FIG.

[Explanation of symbols]

 1 Cassette Main Body 11 Ribbon Housing 12 Arm 13 Arm 14 Outlet 15 Feed Roller 16 Pressure Roller 19 Reversing Member 20 Ribbon Travel Gap 22 Ribbon Replacement Gap 2 Ribbon

Claims (1)

[Scope of utility model registration request] 1. A cassette having a ribbon accommodating portion for accommodating a ribbon in a meandering shape and a hollow arm portion integrally extending from both sides of the ribbon accommodating portion and extending in both arms, and having distal end portions separated from each other. It is accommodated in a ribbon accommodation part in a meandering shape, and is guided from an outlet provided on one side of the ribbon accommodation part to the tip part of one arm part to the print head of the printer between the tip parts of both arm parts. A feed roller that has an endless ribbon that is exposed to the outside so as to face each other and that has the other arm part that returns to the other side part of the ribbon containing part and that holds the ribbon on the other side part of the ribbon containing part. And a pressure roller, and a reversing member for reversing the ribbon in the one arm, the reversing member is directed from the inner surface of the inner wall of the one arm to the other side wall. Or Is formed in the shape of a cantilever wall extending so that a ribbon running gap is formed between the reversing member and the bottom portion of the arm portion, and between the tip end portion of the reversing member and the outer wall, A ribbon cassette for a printer, characterized in that a ribbon exchanging gap continuous with the ribbon traveling gap is formed.