Cutting device and printer

Abstract

A cutting device includes a movable blade and a stationary blade opposed to the movable blade across a sheet-like object to be cut. The movable blade is formed into a concave shape retracted inwardly from opposite end portions toward a central portion thereof. The stationary blade is formed into a straight line in parallel to the cut surface of the object. An angle of each of portions of the cutting edge on sides of the opposite end portions with respect to a cut surface of the object to be cut is larger than an angle of each of portions of the cutting edge on both sides of the central portion with respect to the cut surface.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1A is a perspective view of a cutting device according to a first embodiment of the present invention.

FIG. 1B is a perspective-view of a cutting device according to a first embodiment of the present invention, in a state where an upper cover thereof is removed.

FIG. 1C a side sectional view of a cutting device according to a first embodiment of the present invention.

FIG. 2 is a perspective view for illustrating a cutting operation of the cutting device shown in FIG. 1 with the upper cover thereof being removed.

FIG. 3 is an enlarged plan view of a movable blade and a stationary blade of the cutting device shown in FIG. 1.

FIG. 4 is an enlarged plan view of a movable blade and a stationary blade of a cutting device according to a comparative example.

FIG. 5 is a perspective view of a printer according to the first embodiment of the present invention.

FIG. 6A is a perspective view of a recording device of the printer shown in FIG. 5.

FIG. 6B is a side sectional view of a recording device of the printer shown in FIG. 5.

FIG. 7 is an enlarged plan view of a movable blade and a stationary blade of a cutting device according to a second embodiment of the present invention.

FIG. 8 is an enlarged plan view of a movable blade and a stationary blade of the cutting device according to a third embodiment of the present invention.

FIG. 9 is an enlarged plan view of a movable blade and a stationary blade of a cutting device according to a fourth embodiment of the present invention.

FIG. 10 is an enlarged plan view of a movable blade and a stationary blade of a conventional cutting device.

Claims

1. A cutting device, comprising: a movable blade which has a cutting edge formed into a concave shape retracted inwardly from opposite end portions toward a central portion thereof, and in which an angle of each of portions of the cutting edge on sides of the opposite end portions with respect to a cut surface of a sheet-like object to be cut is larger than an angle of each of portions of the cutting edge on both sides of the central portion with respect to the cut surface; anda stationary blade opposed to the movable blade across the object to be cut.

2. The cutting device according to claim 1, wherein the cutting edge of the movable blade comprises first portions respectively positioned on opposite end portion sides and second portions respectively positioned on both sides of the central portion.

3. The cutting device according to claim 1, wherein the cutting edge of the movable blade comprises three or more pair of portions, and the angle of the cutting edge is changed to three or more levels.

4. The cutting device according to claim 1, wherein the cutting edge of the movable blade constitutes a continuous curve, and the angle of the cutting edge is changed in a stepless manner.

5. The cutting device according to claim 1, wherein a cutting edge of the stationary blade constitutes a straight line in parallel to the cut surface.

6. A printer, comprising: a recording device for effecting recording on a recording medium; andthe cutting device according to claim 1, for cutting the recording medium, on which recording is effected by the recording device, as an object to be cut.