JPH0717492Y2 - Printer paper cutting mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a paper cutting mechanism of a printer, and more particularly, to improvement of a cutting mechanism using a rotary blade and a fixed blade.

(Prior Art) Conventionally, a blade constituting a paper cutting mechanism of a small printer is generally a saw blade, and is made of a flat metal material or a plastic material. There is also a so-called self-polishing type cutting mechanism that automatically grinds the blade during use, but since this self-polishing type cutting mechanism is expensive, it is installed in popular type small printers. Not not.

(Problems to be solved by the invention) Therefore, in the conventional paper cutting mechanism of a small printer, there is a situation in which the cut end is saw-like and cannot be rejected. I was invited.

Therefore, a combination of a rotary blade and a fixed blade can be considered as a paper cutting mechanism of a small printer, but in this case, there are the following problems.

That is, in a small printer, the roller (platen) for feeding the paper is arranged at a position apart from the cut portion near the paper discharge port, and it is necessary to press the paper near the cut portion during cutting. However, since the paper is sequentially fed at the time of printing, it cannot be pressed, and a mechanism for pressing only at the time of cutting is desired. Although it is possible to narrow the paper passage in the cut portion, the paper jam easily occurs in this case.

SUMMARY OF THE INVENTION Under the above circumstances, the present invention has been made for the purpose of providing a paper cutting mechanism for a printer that does not support paper feeding at the time of printing and can perform good cutting.

(Means for Solving the Problems) That is, the present invention is directed to a fixed blade disposed in the vicinity of a discharge port of a printer, a rotary blade that slides in contact with the fixed blade and travels linearly, and travels the rotary blade And a pressing member for pressing the paper at a time, the pressing member being
While being provided so as to be movable back and forth toward the fixed blade,
A groove along the running direction of the rotary blade is formed in the pressing material, and further, an engaging member that is linked to the rotary blade, moves with the rotary blade, and engages with the groove of the pressing material. A printer provided with the groove of the pressing member includes a linear groove portion parallel to the fixed blade for pressing the paper, and a curved groove portion that releases the pressing of the paper at both ends of the linear groove portion. A paper cutting mechanism is provided.

(Operation) At the time of printing, the engaging member of the rotary blade is positioned at the end of the groove, that is, the curved groove portion, and the pressing member is in a so-called retracted state separated from the position where the fixed blade exists. When cutting, the rotary blade travels along the fixed blade.

When the rotary blade starts traveling, the engaging member moves in the curved groove portion. Since the engaging member linearly moves together with the rotary blade, the movement of the engaging member in the curved groove portion causes the pressing member to move. Can be moved in the direction to press the paper. The paper is pressed by the so-called pressed-out pressing material. This state is continued while the engaging member is moving in the linear groove portion. Then, when the rotary blade reaches the end of the groove, the cutting of the paper ends, but at this time, the engaging member moves in the other curved groove, so that the pressing member is accompanied by this. It is brought to the state of being retracted from the cut part. Therefore, the next printing is performed in a state where the pressing material is retracted.

(Example) Hereinafter, the present invention will be described with reference to the accompanying drawings.

In the figure, 1 is a frame, 2 is a discharge port for the paper 3, 4 is a floating rib formed on the frame 1 for floating the discharged paper 3, and 5 is a platen.
Passes through the platen 5 and the discharge port 2 during printing, and the frame 1
The paper 3 is discharged to the outside, the rotation of the platen 5 is stopped at the time of cutting, and the discharge of the paper 3 is stopped. In addition, 18 is a head.

The paper cutting mechanism of the present invention is provided in the vicinity of the discharge port 2 and is roughly the discharge port 2 of the printer.
It is composed of a fixed blade 6 arranged in the vicinity, a rotary blade 7 slidingly contacting the fixed blade 6 to move linearly, and a pressing member 8 for pressing the paper 3 when the rotary blade 7 moves. It

Specifically, the frame body 1 is folded into the printer 3 at the downstream edge of the discharge port 2 and the paper 3 is attached to the paper 3.
The receiving wall 9 is formed, and the fixed blade 6 is fixed to the receiving wall 9.

The rotary blade 7 is always in sliding contact with the fixed blade 6 and can move in the left-right direction of the printer. That is,
A slot 10 is formed in the frame body 1 so as to be oriented in the left-right direction of the frame body 1, and a shaft 12 of a cutter knob 11 is inserted into the slot hole 10 to form a middle portion of the shaft 12 located inside the printer. A supporting rod 13 is projected and fixed to the receiving wall 9 side, and a rotary blade is rotatably attached to the tip of the supporting rod 13 so as to be rotatable.

Reference numeral 14 denotes a rubber roller integrally fixed on the rotary blade 7, and the rubber roller 14 rotates while contacting a guide wall 17 formed in the frame body 1 when the rotary blade 7 moves. It has a role of transmitting the force to the rotary blade 7. That is, rotary blade 7
Rotates integrally with the rubber roller 14. Therefore, when the cutter knob 11 and the shaft 12 move along the slot 10, the rotary blade 7 moves while slidingly contacting the fixed blade 6.

The pressing member 8 is attached to the frame body 1 so as to be movable back and forth, and is configured to be moved to the receiving wall 9 side when the rotary blade 7 is moved (when cut) by the shaft 12. That is, in the case of this example, the pressing member 8 has a linear groove portion.
A groove 15 consisting of a groove 15a and a curved groove 15b facing the fixed blade 6 is formed at both ends of the linear groove 15a.
The shaft 12 as an engaging member is inserted through the shaft 12, and when the shaft 12 linearly moves in the groove hole 10, the shaft 15 engages with the groove 15 to move, and to keep the movement in the linear direction. Figure 3 (a)
As shown in (b), the pressing member 8 is pushed forward, that is, toward the receiving wall 9 side. On the contrary, when the cutting is completed, the shaft 12 is located at the end of the groove 15 (curved groove 15b), and the pressing member 8 moves to the second position.
As shown in FIGS. 9A and 9B, the paper 3 is retracted from the receiving wall 9 so that the paper 3 can be smoothly discharged.

By the way, although the pressing member 8 is newly provided in the above-mentioned embodiment, for example, as shown in FIG. 4, a cover member attached to the discharge port 2 can be used as the pressing member 8. Specifically, the linear and curved groove portions 15a on the cover material,
A groove 15 having a groove 15b is formed so that the shaft 12 can be inserted into the groove 15 so that the cover material moves to the receiving wall 9 side when the rotary blade 7 runs. In the case of this example, the curved groove portions 15a, 15b
The direction of the curve is opposite to that of the previous example. Other configurations are the same as those of the embodiment shown in FIGS. 1 to 3 described above.

In the present invention, a design change such as using a spring (not shown) for pressing the rotary blade 8 against the fixed blade 7 can be appropriately made.

(Effects of the Invention) As described above, according to the present invention, both blades can be polished at the time of cutting to maintain a sharp state at all times due to the combination of the fixed blade and the rotary blade, and at the time of cutting, The paper is pressed by the pressing material (the cover material when the cover material is used as the pressing material), and the beautiful cut of the cut surface can be smoothly performed.
Since the pressing member is retracted, the paper passage is well retained.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view of an essential part of the printer, FIG. 2 (a) is a plan view of a cut portion during printing, and FIG. 2 (b) is a sectional view taken along line (b)-(b) in FIG. 2 (a). Fig. 3 (a) is a plan view of the cut portion during paper cutting, Fig. 3 (b) is a sectional view taken along line (b)-(b) in Fig. 3 (a),
FIG. 4 is a vertical sectional view showing another embodiment. 1 …… Frame, 2 …… Discharge port 3 …… Paper, 6 …… Fixed blade 7 …… Rotating blade, 8 …… Pressing material 12 …… Shaft, 15 …… Groove 15a …… Straight groove, 15b …… Curved groove

Claims (1)

[Scope of utility model registration request] 1. A fixed blade disposed in the vicinity of a discharge port of a printer, a rotary blade that slides in contact with the fixed blade to move linearly, and a pressing member that presses paper when the rotary blade is running. The pressing member is provided so as to be movable back and forth toward the fixed blade, and the pressing member is formed with a groove along the traveling direction of the rotary blade, and further linked to the rotary blade. An engaging member that moves with the rotary blade and engages with the groove of the pressing member is provided, and the groove of the pressing member is a linear groove portion parallel to the fixed blade for pressing the paper, A paper cutting mechanism for a printer, comprising curved groove portions for releasing the pressing of the paper at both ends of the linear groove portion.