Printer and roll paper holding mechanism
First Claim
1. A printer comprising:
- a sheet holding unit configured to have a reference plane for positioning a first end face of roll paper and rotatably hold the roll paper according to an end face reference by the reference plane;
a conveying unit configured to draw out the roll paper held by the sheet holding unit and guide and convey the roll paper along a predetermined guide path;
a printing unit configured to apply printing based on print data to the roll paper guided and conveyed through the guide path;
a contact body configured to have a contact section and to be rotatably provided with the contact section located on a free end side, the contact section coming into contact with a second end face of the roll paper held by the sheet holding unit; and
an urging unit configured to urge the contact body in a first rotating direction for bringing the contact section close to the second end face of the roll paper and bring the contact section into contact with the second end face to bring the first end face of the roll paper into contact with the reference plane, whereinthe sheet holding unit includes;
a sheet holding shaft configured to project from the reference plane, cause a cylindrical paper pipe of the roll paper to be inserted thereover, and hold the roll paper; and
a slide holding mechanism configured to allow the sheet holding shaft to slide between an upper position and a lower position and hold the sheet holding shaft in one of the upper position and the lower position.
1 Assignment
0 Petitions
Accused Products
Abstract
A sidewall supports, in a cantilever state, a sheet holding shaft for holding a label sheet wound in a roll shape and positions a first end face, which is one end face, of the label sheet inserted over the sheet holding shaft. A roll paper holding mechanism that presses a second end face, which is the other end face, of the label sheet, has a first arm, a second arm, and a spring. The first arm projects from the sidewall and rotatably supports the second arm at an end thereof. The spring connects the first arm and the second arm and urges and pulls the second arm. The second arm comes into contact with the second end face of the label sheet in a process of being pulled to rotate and holds the label sheet in conjunction with the sidewall functioning as a reference plane.
3 Citations
14 Claims
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1. A printer comprising:
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a sheet holding unit configured to have a reference plane for positioning a first end face of roll paper and rotatably hold the roll paper according to an end face reference by the reference plane; a conveying unit configured to draw out the roll paper held by the sheet holding unit and guide and convey the roll paper along a predetermined guide path; a printing unit configured to apply printing based on print data to the roll paper guided and conveyed through the guide path; a contact body configured to have a contact section and to be rotatably provided with the contact section located on a free end side, the contact section coming into contact with a second end face of the roll paper held by the sheet holding unit; and an urging unit configured to urge the contact body in a first rotating direction for bringing the contact section close to the second end face of the roll paper and bring the contact section into contact with the second end face to bring the first end face of the roll paper into contact with the reference plane, wherein the sheet holding unit includes; a sheet holding shaft configured to project from the reference plane, cause a cylindrical paper pipe of the roll paper to be inserted thereover, and hold the roll paper; and a slide holding mechanism configured to allow the sheet holding shaft to slide between an upper position and a lower position and hold the sheet holding shaft in one of the upper position and the lower position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A printer comprising:
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a sheet holding unit configured to have a reference plane for positioning a first end face of roll paper and rotatably hold the roll paper according to an end face reference by the reference plane; a conveying unit configured to draw out the roll paper held by the sheet holding unit, and guide and convey the roll paper along a predetermined guide, path; a printing unit configured to apply printing based on print data to the roll paper guided and conveyed through the predetermined guide path; a contact body configured to have a contact section and to be rotatably provided with the contact section located on a free end side, the contact section coming into contact with a second end face of the roll paper held by the sheet holding unit; an urging unit configured to urge the contact body in a first rotating direction for bringing the contact section close to the second end face of the roll paper and bring the contact section into contact with the second end face to bring the first end face of the roll paper into contact with the reference plane; and a first arm projecting from the reference plane to a side on which the roll paper is located by the sheet holding unit, wherein the contact body is a second arm supported at a support point O rotatably with respect to the first arm, the urging unit is a spring, one end of which is located at a predetermined point X and the other end of which is connected to the second arm at a connection point Y, and the printer further comprises a holding mechanism provided in at least one of the first arm and the second arm, and configured to hold, in a position where angle XOY=predetermined angle α
(α
>
180°
), the second arm rotationally displaced to a position where angle XOY>
180°
in a second rotating direction opposite to a first rotating direction by external force and further pulled in the second rotating direction by the spring. - View Dependent Claims (12, 13, 14)
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Specification