JPS5917653Y2 - Ink ribbon attachment mechanism - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an ink ribbon mounting mechanism in a printing device.

It is well known that in an impact printer, for example, a wire dot printer, a plurality of wires are appropriately selected and driven to impact the printing paper via an ink ribbon, thereby printing characters or the like in a dot pattern on the paper. ing.

The ink ribbon used in this printer is usually an endless ribbon stored in a cassette, and a portion of the ribbon is pulled out and hung on a ribbon guide mechanism to be guided.

A known ink ribbon mounting mechanism will be briefly described.

FIG. 1 shows a side view of a known printing device, and FIG. 2 shows an ink ribbon mounting mechanism.

The carriage 2 is arranged to be movable in a direction parallel to the platen 1.

A slide 3 is mounted on the carriage 2 so as to be movable back and forth relative to the platen 1.

A print head 4 is attached to this slide 3.

A ribbon guide 7 is attached between the tip of the print head 4 and the platen 1 to protect the ink ribbon 5.

A ribbon shield 6 made of a thin plate spring material is attached to the ribbon guide 7, and the ribbon shield 6 is attached to the tip of the print head 4.
It is attached to a stud 8 provided on the slide 3 in a state where the two are in close contact with each other.

The ink ribbon 5 is held between a ribbon guide 7 and a ribbon shield 6.

A printing hole 9 is provided in the ribbon shield 6, and a printing wire projects toward the platen 1 through the printing hole 9, whereby printing is performed on the printing paper 10 placed on the platen 1.

When installing or replacing the ink ribbon 5 in this state, move the slide 3 backward with respect to the platen 1,
After providing a gap between the platen 1 and the ribbon shield 6, the upper part of the ribbon shield 6 must be tilted toward the platen 1 side with a fingertip to perform the work.

In this case, it is necessary to insert or remove the ink ribbon 5, which is a thin film, while folding the ribbon shield 6 with a fingertip, which makes the work very complicated and extremely inefficient.

An object of the present invention is to provide an ink ribbon mounting mechanism that allows an ink ribbon to be easily inserted and removed between a ribbon guide and a ribbon shield.

In this invention, an arm attached to the carriage is engaged with the lower part of the ribbon shield attached to the slide, and the ribbon shield is automatically brought down using the back and forth movement of the slide, making it easy to attach and remove the ink ribbon. This is what I did.

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 3 is a perspective view of an ink ribbon mounting mechanism according to an embodiment of the present invention.

Figure 4 shows that the slide of the ink ribbon mounting mechanism is retracted.
FIG. 3 is a side view showing the ribbon shield in a collapsed state.

The Novon guide 7 is bent into an L shape and has an arm portion 71 and a bottom portion 7.
2, one end of the bottom part 72 is fixed to a stud 8 fixed on the slide 3.

Further, the ribbon shield 6 is also bent into an L-shape and consists of an arm portion 61 and a bottom portion 62, and one end of the bottom portion 62 is attached to the bottom portion 72 of the ribbon guide 7.

The ribbon shield 6 is made of a member having a predetermined elasticity, such as a stainless steel plate, and a printing hole 9 is provided on the front surface of the arm portion 61.

Therefore, when the slide 3 moves in the front-back direction with respect to the platen 1, the ribbon guide 7 and ribbon shield 6 also move in the same way.

Furthermore, a Z-shaped arm 11 is provided.

The protrusion 111 at one end of the arm 11 can come into contact with the lower part of the arm 61 of the ribbon shield 6, and the other end of the arm 11 is attached to the carriage 2.

In the ink ribbon mounting mechanism having such a configuration,
When the slide 3 is moved away from the platen 1 by known means, the arm portion 61 of the ribbon shield 6
The lower part and the tip protrusion 111 of the arm 13 abut, the ribbon shield 6 falls toward the platen 1, and a certain distance is secured between the ribbon shield 6 and the ribbon guide 7.

In this state, the ink ribbon 5 is installed or removed between the ribbon guide 7 and the novel shield 6.

Conversely, by moving the slide 3 in the direction of the platen 1, the engagement between the arm portion 61 of the ribbon shield 6 and the tip protrusion 111 of the arm 11 is released, and the ribbon shield 6 is moved by the spring action of the ribbon shield 6. It returns to its original state and can come into contact with the ribbon guide 7 while holding the ink ribbon 5 between them.

As described above, since the ink ribbon mounting mechanism of the present invention has the above-described configuration, the ink ribbon 5 can be mounted and
By moving the slide 3 backward with respect to the platen 1 during removal, a certain gap is obtained between the ribbon guide 7 and the ribbon shield 6, making it easy to install and remove the ink ribbon 5, and It can be done reliably.

Moreover, since the ribbon shield 6 is made of an elastic member, the ink ribbon 5 can be easily attached and removed simply by elastically deforming the ribbon shield 6 with the arm 11, and the slide can be moved to a predetermined position. By simply returning it, the elastically deformed ribbon shield returns with the ink ribbon attached and holds the ink ribbon, and the ink ribbon can be attached by an extremely simple mechanism.

[Brief explanation of the drawing]

FIG. 1 is a side view of a known printing device, FIG. 2 is a perspective view of an ink ribbon mounting mechanism according to the prior art, FIG. 3 is a perspective view of an ink ribbon mounting mechanism according to an embodiment of the present invention, and FIG. 4 FIG. 2 is a side view showing a state in which a ribbon shield of an ink ribbon mounting mechanism according to an embodiment of the present invention is collapsed;

Claims (1)

[Scope of utility model registration request] A print head is mounted on the carriage via a slide, a ribbon guide and a ribbon shield are integrally attached to the slide, and an ink ribbon is guided between the ribbon guide and the ribbon shield in front of the print head. In a printing device that drives the print head and performs a printing operation while moving a carriage parallel to a platen, the ribbon shield is made of an elastic member,
and an arm that can come into contact with the ribbon shield at one end and whose other end is attached to the carriage, and by moving the slide rearward with respect to the surface of the platen, one end of the arm can come into contact with the ribbon shield. An ink ribbon mounting mechanism characterized in that the ink ribbon mounting mechanism is configured such that the ribbon shield is brought into contact with the platen, and the ribbon shield is elastically deformed in the direction of the platen by this contact.