JPS6292878A - Printer - Google Patents

Abstract

PURPOSE:To contrive a simpler construction, by a system wherein a cutting operation of a cutter and an operation of separating a thermal head from a platen roller are selectively performed by a single drive source which can be rotated forward and reversely. CONSTITUTION:When a drive source 4 rotates in the direction of an arrow A, a cam 9 rotates in the direction of an arrow A' through a gear 5, a belt 10 and a cam shaft 9a. With the cam 9 thus rotated, a thermal head 2 is moved upward against the force of a spring 11, so that the head 2 is separated from a platen roller 1. On the other hand, when the drive source 4 is rotated in the direction of an arrow B, a gear 6 rotates in the direction of an arrow B', whereby a cutter blade 3 is oscillated through a link 8 fitted to the gear 6 and a lever 7 connected to the link 8, thereby cutting a recording paper. Accordingly, a simpler construction and a lower cost can be contrived.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a printer, particularly a thermal transfer printer, that is, a thermal head, a platen roller facing the thermal head,
It consists of a recording unit that inserts recording paper between the thermal head and the platen roller, a cutter that cuts the recording paper into a predetermined length after recording, and a mechanism that separates the thermal head from the platen roller as necessary. It is related to printers.

[Background of the invention]

In conventional printers of this type, the means to obtain the power to separate the thermal head and platen roller are known to drive a cam with a motor or to use the suction force of a solenoid (Japanese Patent Laid-Open No. Showa 58-1
34760, 1982-194591).

However, since each of the above means requires a dedicated power source, there are problems in that the structure is not only complicated but also the cost is increased.

[Purpose of the invention]

The present invention solves the above problems and uses a single drive source to
The purpose of this invention is to provide a simple and inexpensive printer in which the cutting operation of the cutter and the separating operation of the thermal head are selectively performed.

[Summary of the invention]

To achieve the above object, the present invention includes a thermal head, a platen roller that is in contact with the thermal head, and a recording section that interposes recording paper between the thermal head and the platen roller.
A printer comprising a cutter that cuts the recording paper into a predetermined length after recording, and a mechanism that separates the thermal head from the frittin roller as necessary. The present invention is characterized in that the cutting operation of the cutter and the separating operation of the thermal head are selectively performed.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to the drawings. The drawing is a configuration diagram showing this embodiment, in which 1 is a platen roller rotatably supported by a motor (not shown), 2 is a thermal head installed opposite to the platen row 21, and the thermal head is 2 is pressed against the platen roller 1 via a spring 11. A recording paper (not shown), which is interposed between the thermal head 2 and the platen row 21 by an appropriate mechanism (not shown), is colored and recorded via the thermal head 2, and after the recording is completed. The recording paper is cut into a predetermined length by a cutter 6.

A driving gear 4 directly connected to a drive source, for example, a motor (not shown), is provided so as to be selectively capable of forward and reverse rotation (rotation in directions A and B). That is, when the main gear 4 is rotated counterclockwise (direction A) by a one-way clutch (not shown), one driven gear 5 meshing with the gear 4 is rotated clockwise (direction A'). However, the other driven gear 6 that meshes with the gear 4 does not rotate. Conversely, when the main gear 4 rotates clockwise (direction B), one driven gear 5 stops and the other driven gear 6 rotates counterclockwise (
B' direction).

A belt 10 is stretched between the shaft 5a of the driven gear 5 and the shaft 9a of the cam 9, which is connected to one end (right end) of the platen roller 2 and is rotatably provided.

On the other hand, the other end of the link 8, one end of which is attached to the driven gear O, is
It is connected to the tip of a lever 7 attached to the blade (not shown) of the cutter 3.

Next, the operation of this embodiment having the above configuration will be explained.

When the drive source 4 rotates counterclockwise (direction A), the gear 5
rotates clockwise (A' direction), so the cam 9 rotates clockwise (A' direction) via the belt 10 and camshaft 9a.
Rotate to . Due to the rotation of the cam 9, the thermal head 2 moves upward against the force of the spring 11, so that the thermal head 2 is separated from the platen roller 1. Conversely, if the drive source 4 is rotated clockwise (direction B), the gear 6 will rotate counterclockwise (
B' direction), the cutter blade 6a is swung via a link 8 attached to the gear 6 and a lever 7 connected to the link 8, so that the cutting operation of the recording paper (not shown) is performed. It will be done.

〔Effect of the invention〕

As explained above, according to the present invention, the cutting operation of the cutter and the separating operation of the thermal head can be selectively performed by forward and reverse rotation of a single drive source, thereby simplifying the structure and reducing costs. It is possible to reduce the

[Brief explanation of drawings]

The drawing is a configuration diagram showing an embodiment of the printer of the present invention. 1...Platen roller 2...Thermal head 6...Cutter 4...Drive source 5.6...Gear 7... ... Lever 8 ... Link 9 ... Cam 10 ... Belt

Claims (1)

[Claims] a thermal head, a platen roller that is in contact with the thermal head, a recording section that inserts a recording paper between the thermal head and the platen roller, a cutter that cuts the recording paper into a predetermined length after recording; In a printer comprising a mechanism for separating a head from a platen roller as necessary, the cutting operation of the cutter and the separating operation of the thermal head are selectively performed by a single drive source provided so as to be capable of forward and reverse rotation. A printer characterized in that it is configured as follows.