JPS5923002Y2 - Cartridge for endless ink ribbon - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an endless ink ribbon cartridge used in a printing device.

In the case of a printing device that uses an ink ribbon, for example a typewriter ribbon, a mechanism is required to reverse the feeding direction of the ink ribbon, so if the ink ribbon is housed in a cartridge, the structure of the cartridge and feeding mechanism will become complicated. There are drawbacks.

This invention has the durability of a normal ink ribbon,
Another object of the present invention is to provide an ink ribbon cartridge that eliminates the above-mentioned drawbacks, has a simple structure, and is particularly suitable for small-sized digital printers.

The object of the present invention is to provide two rotatably provided guide members around which a part of the endless ribbon is wound, at least one of which drives the endless ribbon in rotation, and to provide a mechanism for connecting the two guide members to each other. The guide member is provided so as to be movable in a direction substantially perpendicular to the imaginary line connecting the centers of rotation of both guide members, and the cylindrical surface of the hook is in contact with the endless ribbon in the part where it is passed between the two members, and the hook is attached to the endless ribbon. An ink-impregnated member impregnated with ink for supplying ink, and an ink-impregnated member indicated by L in a direction that increases the wrapping angle of the cylindrical surface contact between the ink-impregnated member and the endless ribbon and applies tension to the endless ribbon. This is achieved by a cartridge for endless ink ribbon, which is equipped with an elastic member for urging the endless ink ribbon, and a ribbon outlet for guiding the other part of the endless ribbon to the outside.

According to the cartridge of the present invention, the ink impregnating member doubles as an ink supply member to the endless ribbon and a tension mechanism for the ribbon, so the structure is simple.
By converting, the number of parts can be reduced as much as possible.

In other words, when using an endless ink ribbon, a tension mechanism is required, but if the ink-impregnated member is made to exert tension as in the present invention, there is no need to provide a special tension member, which reduces the number of parts and assembly. The process can be omitted.

The ink ribbon cartridge is a consumable item and is relatively inexpensive.

Therefore, it is extremely important that the number of component parts of the Car 1 helicopter is as small as possible, and that the number of steps required for assembling it is as small as possible.

Further, by making the ink-impregnated member perform a tensioning action, the direction in which the ribbon is fed is not restricted, and it is possible to provide a ribbon cartridge that can be fed in either forward or reverse directions.

Further, by bringing the endless ink ribbon and the ink-impregnated member into cylindrical contact with each other and urging the ink-impregnated member in a direction that increases the wrapping angle, ink can be supplied evenly and reliably.

The present invention will be explained below with reference to illustrated embodiments.

Curl ridge is a main body 1 having peripheral walls 1 a, 1 b
and a lid 2 that covers the main body (only the part is shown in Figure 2)
The two are fixed to each other by adhesive or heat caulking.

The main body 1 is formed with ribbon inlet/outlet ports 4, 4 for guiding a portion of the endless ribbon 3 from the car 1 to the outside of the ridge.

Further, a groove 1C is formed in the center of the main body 1,
A U-shaped support 6, in which an ink-impregnated member 5 impregnated with ink is rotatably supported by its shaft 5a, is loosely fitted into the groove 1C so as to be slidable in the groove direction.

That is, the ink-impregnated member 5 is provided so as to be movable in a direction perpendicular to an imaginary line connecting the rotation centers of two guide members 8, 8, which will be described later.

An extensible spring 7 is fitted between the support 6 and the peripheral wall 1a, and provides a tendency to move the support 6, in other words, the ink-impregnated member 5, upward Jj in FIG. ing.

The ink-impregnated member 5 L is a cylindrical body made of porous rubber, synthetic resin, or fiber, and is impregnated with ink in advance.

Further, a pair of force-id members 8, 8 are rotatably mounted on the main body 1, with the ink-impregnated member 5 interposed therebetween.

Then, the endless ribbon 3 is transferred to the ribbon feeding/outlet port 4.
, 4, are wound around the guide members 8, 8 and the ink-impregnated member 5.

The guide members 8, 8 and the ink-impregnated member 5 are positioned relative to each other such that the winding angle of the endless ribbon 3 wound around the impregnated member 5 is large.

Tension is applied to the endless ribbon 3 wound as shown in L above by the upward movement of the ink-impregnated member 5 in the figure by the spring 7.

As shown in FIG. 2, the lid 2 is formed with a groove 2a that loosely guides the support 6.

Note that the surface of the endless ribbon 3 that contacts the ink-impregnated member 5 is the surface that contacts the recording paper (not shown).

Further, the shafts of the guide members 8, 8 are exposed from the main body 1 and are coupled to a ribbon feeding mechanism (not shown).

Then, the endless ribbon 3 is fed in the direction of the arrow by rotating the force guide members 8, 8, for example, in the direction of the arrow.

At the same time, ink is transferred to the endless ribbon 3 from the ink-impregnated member 5.

In the embodiment shown in FIG. 1, the ink-impregnated member is rotatably provided, but in FIG. 3, an embodiment in which the ink-impregnated member is not allowed to rotate will be described.

In FIG. 3, the ink-impregnated member 9 is fixed to a support frame 10. In FIG.

The support frame 10 is fixedly supported by a free end 12 b of a support arm 12 whose base end 12 a is fitted into an eyebrow-shaped groove 11 a formed in the cartridge body 11 .

That is, the ink-impregnated member 9 includes two guide members 8,
It is movable in a direction substantially orthogonal to the virtual line connecting the rotation centers of the two rotation centers of the two.

The support arm 12 fitted in the cocoon-shaped groove 11a can swing to some extent around the base end 12a, but an elastic spring 13 is provided between the arm and the peripheral wall 11b of the main body. This causes a counterclockwise rocking habit, in other words,
Tension is applied to the entrespons 3 wrapped around the guide members 8, 8 and the ink-impregnated member 9.

Note that the positional relationship between the ink-impregnated member 9 biased by the spring 13 and the guide members 8, 8 increases the winding angle between the endless ribbon 3 wound around the ink-impregnated member 9 and the ink-impregnated member 9, resulting in surface contact. This is the same as in the previous embodiment.

As described above, according to the present invention, in which the ink-impregnated member and the guide member are arranged so that the endless ribbon is in surface contact with the ink-impregnated member and the same member acts as a tension mechanism, the ink-impregnated member can be ink-filled with an extremely simple structure. Since the ribbon can be made into a car I-ridge and the ink is constantly replenished in the nozzle, a short ink ribbon can be used for a long period of time.

Furthermore, by configuring the endless ribbon to make surface contact with the ink-impregnated member, ink transfer from the ink-impregnated member to the ribbon becomes uniform and reliable, and the winding angle around the guide member that carries out the ribbon feeding action is also reduced. It is inevitably large and allows for reliable and stable nobon feeding.

Furthermore, since there is no need to change the feeding direction of the ink ribbon, and there are no restrictions on the feeding direction, the ribbon feeding mechanism of the device that connects the cartridge becomes simple.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing the internal structure of a cartridge according to an embodiment of the present invention, FIG. 2 is a cross-sectional view of a main part showing the ink-impregnated member installed in the same embodiment, and FIG. 3 is a plan view showing the internal structure of a cartridge according to an embodiment of the invention. FIG. 3 is a plan view showing the internal structure of the embodiment. 3... Endless ribbon, 4... Ribbon feed/output "1.5, 9... Ink impregnated member, 7
, 13... Spring, 8... Guide member.

Claims (1)

[Scope of utility model registration request] between two rotatably provided force-id members around which a part of the endless ribbon is wound and at least -Jj rotationally drives the endless ribbon; It is provided so as to be movable in a direction substantially perpendicular to the imaginary line connecting the rotation centers of the members,
A cylindrical surface contacts the endless ribbon in the part where the hook is passed between the two members, and supplies ink to the ribbon.
an ink-impregnated member impregnated with ink; and an elastic member for increasing the wrapping angle of the cylindrical surface contact between the ink-impregnated member and the endless ribbon and urging the ink-impregnated member in a direction that applies tension to the endless ribbon. and a ribbon delivery [1] that guides another part of the endless ribbon to the outside.