JPS62294569A - Printing apparatus - Google Patents

Abstract

PURPOSE:To facilitate the mounting of paper and to achieve the miniaturization of electronic machinery and the reduction of the number of parts, by forming a platen to the surface of the housing of a roll paper holder detachable with respect to a printer. CONSTITUTION:A type belt 7 is struck at a predetermined character position by a hammer 9 and a character is printed on paper 4. The platen part 10 integrally provided to a roll paper holder 61 has function for supporting the paper struck by the hammer 9 from the backside thereof. The paper 4 is mounted in the roll paper holder 6 and successively delivered to the outside through the through-hole 11 provided to the bottom part of the roll paper holder 6 to be sent to a printer. The roll paper is fed to the type belt by rollers 5, 12. When the roll paper holder having the roll paper received therein is mounted on the printer, the end part 4a of the roll paper is arranged on the printer at first so that the paper is placed on the roller 5 of the printer and the holder 6 is fixed to the printer so as to allow the platen part 10 to oppose to the type belt 7.

Description

Detailed Description of the Invention 3. Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a printing device, and particularly to an improvement of a printing device in which a platen portion is detachable.

(Prior art) Conventionally, in printing devices used in small desktop calculators, etc., in order to load printing paper, one end of the paper is inserted into the insertion slot, and while maintaining this state, the feed key is pressed until it reaches the specified position. I just needed to send it. However, this operation required both hands and was troublesome.

〔the purpose〕

SUMMARY OF THE INVENTION It is an object of the present invention to provide a printing device that eliminates the above drawbacks, simplifies the operation of setting printing paper, and further simplifies the structure.

〔Example〕

FIGS. 1 to 3 show an embodiment of the present invention using an impact printer as an example. First, FIG. 2 is a schematic diagram of the roll paper holder 6 installed in the printer.
7 is the main body of the printer, and numeral 7 is a type belt driven by a motor 8. At a predetermined character, a handshake 9 strikes the type belt 7, and the character is printed on the paper 4. Reference numeral 10 denotes a platen portion that is integrally provided with the roll paper holder 6, and serves to support the paper that has been hit by the hammer 9 from the back side. The paper 4 is housed in a roll paper boulder 6, and is inserted through a through hole 11 provided at the bottom of the roll paper holder.
The image is then ejected to the outside one by one and sent to the printer. 5
12 is a paper feed roller provided on the printer, and 12 is a paper press roller provided on the roll paper holder.
The roll paper is fed towards the type belt by these two rollers.

Next, the structure of the roll paper holder and the operation of attaching and detaching it to the printer will be explained with reference to FIGS. 2 and 3.

FIG. 2 is an exploded perspective view showing an example of the structure of the roll paper holder. As shown in the figure, the roll paper holder is obtained by combining two casings made of, for example, transparent plastic molds. Here, as an example, the casing 6a on the side facing the type heddle when installed in the printer will be called the casing (A), and the other casing 6b will be called the casing (B). The casing (A) and the casing (B) have spaces 6c and 6d inside, respectively. It has a size larger than that which can accommodate the paper 4. Housing (A)
For example, as shown in FIG.
) is press-fitted into holes 6f provided in the housing (A) at corresponding positions. Other methods such as fitting a claw-like locking portion or screwing may also be used. Reference numeral 12 denotes a paper pressing roller attached to the casing (A), and the shaft portion 12a is held by a locking portion 6g provided integrally with the casing (A) inside the casing (A). It is rotatably attached to the housing (A). The roller outer peripheral portion 12b is exposed to the outside through the through hole 6h of the housing (A), and comes into contact with the paper that has not been sent to the printer. As mentioned above, the roll paper consists of the housing (A) and the housing (
B) and the end portion 4.
a is the notch 6i provided in the casings (A) and (B)
, 6j to the outside through the gap 11,
sent to the printer. In addition, the housing (A) is provided with a flat part 10 having a predetermined area at a position facing the type belt, and this flat part functions as a platen of the printer when the roll paper holder is attached to the printer. This is the part that does this. If a plastic mold is not suitable for the platen, a thin metal plate, rubber plate, or the like may be added to the flat part.

Next, the operation of attaching and detaching the roll paper holder structured as described above to the printer will be explained with reference to FIG. FIG. 3 is a perspective view showing the operation of attaching and detaching the roll paper holder to and from the printer.

When installing a roll paper holder containing roll paper in a printer, first place the end 4a of the roll paper led out from the roll paper holder on the printer so that the paper is placed on at least the paper feed roller 5 of the printer. to pay. In this manner, the roll paper holder 6 is fixed to the printer so that the platen portion 10 faces the type belt 7 of the printer. As a fixing method, for example, as shown in FIG. 3, a protrusion 6k provided on the side surface of the roll paper holder is fitted into an elastic locking portion 1a provided on the printer against elastic force. Of course, other methods may also be used for fixing. Conversely, if you want to remove the roll paper holder from the printer, all you have to do is pull out the protrusion 3 of the roll paper holder from the printer's locking part against the elastic force, as shown in Figure 3. By providing the knurled portion 61 on the side surface of the roll paper holder in this way, it will be easier for the fingers to rest on the roll paper holder, making it easier to remove the roll paper holder from the printer.

Although this embodiment has been described using an impact printer as a printing device, the present invention can also be applied to other printing devices such as a thermal printer, a thermal transfer printer, etc. with the same effect.

(Effects) As is clear from the above description, the printing device according to the present invention has a structure in which a platen is formed on the surface of the casing of the roll paper holder that is detachable from the printer, making it easy to load paper. This makes it possible to downsize electronic devices.It also has the great effect of reducing costs by reducing the number of parts compared to conventional methods.

[Brief explanation of the drawing]

FIG. 7 is an explanatory diagram of an embodiment of the printing device according to the present invention. FIG. 2 is an explanatory diagram of an embodiment of a roll paper holder that can be attached to and detached from the printing device of this embodiment. FIG. 3 is an external view for explaining the operation of attaching and detaching the roll paper holder to and from the printing device. 1-111 printer, 4-111 roll paper, 6----roll paper holder, 10----platen section, 11----1 through hole.

Claims (1)

[Claims] 1. A printing device having a detachable platen portion, characterized in that the platen is formed on the outer surface of a casing that holds roll paper, and the casing is made detachable from the main body of the printing device.