JPS61291168A - Ribbon cassette - Google Patents

Abstract

PURPOSE:To prevent the folded condition of a ribbon enclosed in a ribbon cassette from being disordered or distorted when the cassette is not mounted and enable the ribbon to be smoothly fed when the cassette is mounted, by moving a partition member to the upper casing side against an elastic member by bosses inserted through holes when a ribbon cassette is mounted. CONSTITUTION:When the ribbon cassette 21 is not mounted, a partition plate 37 is moved to the side of a printing ribbon 29 by a compression spring 39, is supported on projected support parts 31a-31d, the spacing between the ribbon 29 and the plate 37 is set to be l2, and movement of the ribbon 29 in the cassette 21 is restricted, whereby the folded and contained condition of the ribbon 29 is prevented from being disordered or distorted. When the cassette 21 is mounted, the plate 37 is pushed upward against the spring 39 by the bosses 17a-17d inserted into the holes 33a-33d, and the spacing between the ribbon 29 and the plate 37 is set to be l1, whereby running resistance of the ribbon is reduced at the time of a printing operation, resulting in smooth feeding of the ribbon.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a ribbon cassette that is attached to various printing devices such as electronic typewriters or printers and stores a ribbon for printing or erasing printed characters.

[Prior Art] Conventionally, a ribbon cassette installed in a printing device is composed of a lower case that covers the lower part of the ribbon, and an upper case that faces the lower case and covers the upper part of the ribbon. The ribbon is folded and accommodated in the gap formed between the ribbon and the case with a sufficient distance between the upper end of the ribbon and the -V case to avoid mutual contact. The above spacing is extremely narrow, about 0.5m+n, to prevent the stored ribbons from moving, in order to prevent the ribbons from being disturbed or twisted when they are transported or removed and carried.
It is set to about. The ribbon is fed out from one arm and then fed into the other arm while moving within the ribbon cassette in conjunction with the printing operation or erasing operation of printed characters.

[4-Problems to be Solved by the Invention] However, as mentioned above, since the distance between the ribbon end and the 1-case is extremely narrow, the inside of the ribbon cullet is If the upper end of the moving ribbon touches the 1-case, the running resistance of the ribbon is large.
I was there. This bundling causes poor feeding of the ribbon, making it difficult to feed the ribbon smoothly. For this reason, with printing ribbons, many characters are printed using the same location on the ribbon, and the printed characters gradually become unclear, and with erasing ribbons, the same location on the ribbon is printed. This caused the problem that a large number of printed characters were erased when using the printer, making it impossible to erase the printed characters reliably.

[Object of the Invention] The object of the present invention (1) In view of the above-mentioned conventional drawbacks, it is possible to prevent the folded state of the stored ribbon from being disturbed or twisted when it is not attached to a printing device. When the printer is installed in the printing device, the ribbon can be fed smoothly by using the ribbon cassettes 1 to 1.

L Problem f: Means for solving i+ 1 For this reason, the present invention provides a ribbon force set 1 to 14 that stores the ribbon used when printing or erasing with a printing device and installs it in the printing device. 4-piece ribbon force that can be attached to and detached from the attachment part
In the ribbon cassette installation I, there are two front-distributed bon force sets 1 to 7, which have a hole through which the boss of the attachment part is inserted, and which cover the lower part of the ribbon, and which cover the upper part of the ribbon. an elastic member that pushes the first cutting member toward the ribbon; The bullet f is attached to the ribbon cutlet 1 by the boss inserted through the hole M in the hole 11N.
A ribbon cassette is configured such that the fl cutting member is moved toward the upper case side against the fNI force of part 1 (A).

[Operation of the Invention] According to the present invention, when the ribbon cassette is not attached to the printing device (31, A1 cutting member moves toward the ribbon side due to the elastic force of the bullet +1 member and the ribbon is cut). Ni (J
Since the movement of the ribbon is restricted, when the ribbon cassette h is transported or carried, it is avoided that the ribbon is stored irregularly or twisted. Furthermore, when the ribbon horn set is installed in the printing device, the boss inserted into the hole moves the partition member toward the upper case against the elastic force of the elastic member, thereby avoiding contact between the ribbon horn set and the ten case. Therefore, the running resistance of the ribbon is reduced to less than 4 t (t), and the ribbon can be fed smoothly.

[Embodiment] The present invention will be described below with reference to an embodiment of a ribbon cassette installed in a dot-in-back type printer.

In FIG. 1, which schematically shows a dot-type printer to which a cassette according to the present invention is installed, the right pair of frames (
A platen 5 is rotatably supported between the two (not shown), and a platen drive motor (not shown) such as a step motor or a DC motor is connected to the platen 5. As a result, the platen 5 rotates once in a predetermined direction as the platen drive motor is driven, and the printing paper 7 mounted on the platen 5 is fed. A pair of spear guide shafts 9 are horizontally suspended between the frames parallel to the axis of the platen 5, and the two l-
A 1-P ridge 11 is supported on the i/ridge guide shaft 9 so as to be movable in the axial direction of the carriage guide shaft 9 . A gear carriage drive motor such as a step motor or a V)C motor is connected to the carriage guide shaft 9 via a timing belt (none of which is shown), and the carriage 11 moves along the carriage guide shaft as the carriage drive motor drives. 9
is reciprocated in the axial direction. A dot-impact type print head 13 is attached to the carriage 11, and the print head 13 selectively drives a number of built-in electromagnetic devices (not shown) based on print data to correspond to the electromagnetic devices. By making the overlying printing wire (not shown) print dynamic, the printing data is converted into dot 71 helix format□
is printed.

In the frame, a boulder 15 is installed in front of the print head 13 to a cassette 1 serving as a ribbon cutter attachment part.
1 and a boss 17 on one side of the cassette holder 15.
Shimononose 2 that a-17CI will cover later! :) Corresponding to the holes 33a to 33d formed in the holes 33a to 33d and erected at a required height. The bosses 178 to 171 are attached to the printer 1 (assuming that the ribbon cutter 21 is attached to the ribbon cutter 1 to be described), and the printing ribbon 29 accommodated in the ribbon cutlet 1 to 21 is located between the t end and the cutout plate 37 to be described later. The height is set at a height plus an interval ρ1 of about 2 to 4 ml culm that can avoid mutual contact η.The lower surface of the cassette holder 15 is
The ribbon feed motor 19 of the C dryer etc. should be removed corresponding to the drive roll/11 mentioned above. The cassette holder 15 has hook portions 16a to 16a on the front and rear edges.
When the ribbon cassette 21 is attached to the printer 1, the hook portions 16a to 16d are engaged with the surface of the case 25 of the ribbon cassette 21.
and is removably supported.

2 shows a disassembled state with a part of the ribbon force set 1 to 11 broken, and FIG. The ribbon cassette 1-21 is made of synthetic resin and has both arm portions 21a and 21b extending toward the right end of the print line.
It is composed of a lower coos 25 made of synthetic resin like the coos 23, and which space 2 of these ten cases 23 and T case 25
4, an endless printing ribbon 29 is folded and stored.

One support part 31a to 31d is provided on the bottom surface of the upper case 23.
corresponds to the bosses 17a to 176, and the distance f12 between the ribbon width and the width of the printing ribbon 29 (01>12
). This interval 12 is provided between the upper end of the printing ribbon 29 and the cutting plate 37 in order to restrict the movement of the printing ribbon 29 housed in the ribbon cassette 21 when the ribbon cassette 21 is not attached to the printer 1.
The distance is set to be approximately 0.5 mm. Holes 338 to 33 are provided in these support protrusions 31a to 31d.
A ribbon cassette 21 is formed with a ribbon cassette d and is connected to the printer 1.
When the bosses 178 to 17d are installed, the holes 33a to 33
It is inserted into d. Support walls 35a to 35d are integrally formed with each of the support protrusions 31a to 31d. The support protrusions 31a to 31d-L are provided with an I1 cutting member.
The cutouts 4fi37 are attached to the supports v35a to 35d and are supported so as to be movable in the vertical direction shown in the figure.

A compression spring 39 as an elastic member is attached between the cut root 37 and the first case 23 corresponding to the support protrusions 31a to 31(), and the compression spring 39 is The A1 cutting plate 37 is always urged toward the printing ribbon 29 side.The drive roll 41 and the driven roll/13 are in close pressure contact between the tenth case 23 and the bottom case 25 and are rotatable. The drive 11-rule 41 is connected to the ribbon feed motor 19 when the ribbon force set 1-21 is installed in the printer 1.Thereby, as the ribbon feed motor 19 is driven, the drive 11-21 is connected to the ribbon feed motor 19. 11-ru 4
1 and the driven roll 43 is fed out from one arm 21a and then fed into the other arm 2Ib.

Next, the operation of the ribbon cassette 21 constructed as described above will be explained with reference to FIGS. 3 and 4.

In FIG. 3, from the printer 1 to the ribbon cassette 1-21
When the printing ribbon 2 is removed, the cutting plates 37 in the ribbon force sets 1 to 21 are bent in the direction of the elasticity of the compression spring 39.
9 side, and is supported by the support protrusions 31a to 31d. At this time, since the distance between the print ribbon 29 and the fj cutting plate 37 is set to 12, the partition plate 37 is as close to the print ribbon 29 as possible, and the movement of the print ribbon 29 within the ribbon cassette 21 is prevented. is regulated. In addition, when the ribbon cassette 21 is transported or carried, the two printing ribbons are prevented from being folded and stored irregularly or twisted in the ribbon cassette 1-21. As a result, when the ribbon cassette 21 is installed in the printer 1, the stored printing ribbon 29 is sent out without twisting or the like.

In FIG. 4, which shows a state in which the ribbon cassette 21 is attached to the printer 1, the ribbon cassette 21 is attached to the printer 1.
When installed, the cutout plate 37 is pushed upward against the elasticity of the compression spring 39 by the bosses 17a to 17d inserted into the holes 33a to 33d. At this point, a distance f11 is set between the printing ribbon 29 and the partition plate 37. As a result, during printing operation, the printing ribbon 29
There is no contact between the printing ribbon 2 and the partition plate 37.
The ribbon can be fed smoothly by reducing the running resistance of 9.

In the above description, the ribbon cassette 21 houses the printing ribbon 29 for printing characters, but the ribbon cassette 1- may house the erasing ribbon for erasing printed characters.

Furthermore, although the above description has been made regarding the ribbon current attached to a dot to impact type printer, the present invention may also be a ribbon current attached to a thermal transfer type printer, a type impact type printer, or an electronic typewriter.

[Effect of the Invention 1] Therefore, the present invention can prevent the folded state of the accommodated ribbon from being disturbed or twisted when it is not attached to the printing device, and can smoothly fold the ribbon when it is attached to the printing device. It is possible to provide a ribbon cassette that can be fed.

[Brief explanation of the drawing]

Figure 1 shows the ribbon force set 1 for impact type dot printers.
- Figure 2 is an exploded perspective view showing a part of the L case attached to the ribbon attachment part 1 is cut away, and Figure 3 is the Δ-A line of Figure 2. Ribbon force set according to position 1~
FIG. 4 is a cross-sectional view showing the assembled state of the ribbon force set 1 to 1. In the figure, 1 is a printer as a printing device, and 15 is a cassette as a ribbon cassette mounting part!・Holder, 178-17d
is the boss, 21 is the ribbon force set 1~. 23 is ten cases, 2
5 is the lower case, 29 (printing ribbon as a pop, 3
38 to 33 (1 is a hole, 37 is a partition plate as a partition member, 39 is an elastic part (A is a compression spring).

Claims (1)

[Claims] (1) In a ribbon cassette that stores a ribbon used when printing or erasing with a printing device and can be attached to and removed from a ribbon cassette attachment portion provided in the printing device, the ribbon cassette is attached when the ribbon cassette is attached. a lower case that covers the lower part of the ribbon and has a hole through which the boss of the ribbon is inserted; an upper case that covers the upper part of the ribbon; a partition member inserted between the upper case and the ribbon; and the partition. an elastic member that biases the member toward the ribbon, and a boss inserted through the hole when the ribbon cassette is attached moves the partition member toward the upper case side against the bias of the elastic member. A ribbon cassette featuring