JPS6073882A - Printing apparatus - Google Patents

Abstract

PURPOSE:To attain the enhancement of operability, by constituting the titled apparatus so as to integrally open a printing part cover and a paper passage cover in performing the exchange of a ribbon or the maintenance and inspection of a printing head. CONSTITUTION:When the exchange of a ribbon or the maintenance and inspection of a printing head 5 or a carrier mounting the same is performed, a printing part cover 2 may be rearwardly revolved. In this case, the projection 8 of the printing part cover 2 is escaped from the recessed part 9 provided to a housing 1 while elastically deformed. When the printing part cover is revolved, the paper passage cover 3 superposed thereon is also revolved of course but, because both covers 2, 3 are different in their revolving center positions, the revolving loci of an engagement part 7 and the part 7 to be engaged are different. Therefore, unless the engagement state of the engagement part 10 and the part 7 to be engaged is released, both covers are not revolved but, because slide surfaces 12, 13 are mutually slid and the part 7 to be engaged is elastically deformed, the engagement part 10 is disengaged from the part 7 to be engaged and the revolution of both covers is enabled.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a printing device in which a printing section cover and a paper path cover can be opened integrally.

[Technical background of the invention and its problems]

In a printing device in which the top opening of the housing housing the printing section is closed by a printing section cover and a paper path cover, the printing section cover opens forward with the front end as the center of rotation, and the paper path cover opens forward at the rear end. The most common type is one that opens rearward with the center of rotation as the center of rotation. Then, when setting printing paper, the paper path cover is opened, and when replacing the ink ribbon or performing maintenance and inspection of the print head or carrier section, the printing section cover is opened.

However, with a structure in which the print section cover opens forward, this cover gets in the way of ribbon replacement and print head maintenance and inspection work, and operability is affected if the paper path cover with the print section cover opens in a different direction. But there is a problem.

Therefore, it is conceivable that the printing section cover also opens rearward with the rear end as the center of rotation, and that the paper path cover is placed over the printing section cover.

However, the problem in this case is that when setting paper, you only need to open the paper path cover, but when replacing the ribbon or performing maintenance and inspection of the print head, first open the paper path cover, then open the print section cover. The problem is that it requires two operations to open it.

[Purpose of the invention]

Therefore, an object of the first invention is to close the top opening of the housing housing the printing section with the paper path cover of the printing section cover;
In a printing device in which the paper path cover is stacked on top of the printing section cover, and both covers are opened around the rear end, the printing section cover must be removed when replacing the ribbon or performing maintenance inspections on the print head. The purpose of the present invention is to improve operability by making it possible to open the paper passage cover and the paper passage cover in one piece.

Further, a second aspect of the present invention is that in the printing device as described above, an engaging portion and an engaged portion are provided for holding the paper path cover in the closed position, and when the printing portion cover is rotated in the opening direction, the engaging portion is engaged. The object of the present invention is to improve operability by automatically disengaging the engaged portion and allowing both force bars to open in unison.

[Summary of the invention]

First, in the printing device according to the first invention, the center line of rotation of the paper path cover is placed at a position rearward from the center line of rotation of the print section cover, and each cover is further provided with a center line of rotation when the cover of the printing section is rotated in the opening direction. The printing unit cover and the paper path cover are configured to have sliding surfaces that slide against each other so that the printing section cover and the paper path cover can be opened together by sliding the sliding surfaces together.

Further, in addition to the configuration of the first invention, the printing device according to the second invention provides a retaining portion on the paper path cover, and a secured portion on the printing portion cover, and the engaging portion and the engaged portion. The paper path cover is held in the closed position by the engagement with the part, and the engagement part and the engaged part are disengaged by the sliding contact between the sliding surfaces, and both force bars open together. It is configured so that it can be

[Embodiments of the invention]

Figure 1. This shows an embodiment common to the second invention, and in FIGS. 1 and 2, 1 is a casing whose top surface is open;
Reference numeral 2.3 denotes a printing section cover and a paper path cover that close the upper opening of the housing 1.

A printing section consisting of a rotatable platen 4 and a print head 5 facing the platen 4 is housed inside the casing 1, and the housing section of the print head 5 is covered with the printing section cover 2.

The printing section cover 2 has its rear end rotatably supported on the upper part of the housing 1. Further, the paper path cover 3 has a rear end
It is rotatably supported on the upper part of the casing 1 at a position rearward from the center line of rotation of the printing section cover 2, and is placed overlapping the printing section cover 2.

A paper passage 6 is formed between the rear end of the housing 1 and the printing section along the inner surface of the paper passage cover 3, through which printing paper passes.

The printing section cover 2 is open from the upper position of the platen 4 to the rear end, and a symmetrical secured part 1 is formed near the upper position of the platen 4. This secured part 7
As shown in FIGS. 3 to 5, it has a U-shape that opens downward and is elastically deformable toward the center. Further, a hook-shaped protrusion 8 is provided at the front end of the print section cover 2, and by elastically fitting this protrusion 8 into a recess 9 provided on the housing 1 side, the print section cover 2 can be opened. It is configured to be held in the closed position.

On the other hand, the paper path cover 3 is formed so as to close the opening of the printing section cover 2, and has left and right sides that fit into each of the engaged sections -7 from the outside when the printing section cover 2 is in the closed position. It has a symmetrical retaining part 10. This engaging portion 10
As shown in FIGS. 3 to 5, these are projecting pieces 11 extending downward from the left and right edges of the paper path cover 3 so as to form a spherical body, and projecting from the inner surface of the protruding pieces 11, as shown in FIGS. The locking and releasing operations are made possible by elastically deforming the locked portion 7 toward the center.

The printing section cover 2 has a sliding surface 1 that includes an inclined surface that rises toward the front at a position slightly forward of each engaged section 7.
2 are provided symmetrically. On the side of the paper path cover 3, the front edge of each protruding piece 11 is inclined upwardly toward the front, and a sliding surface 13 is formed extending from this slope to the cover edge further forward.

Therefore, when setting printing paper, use the paper path cover 3.
Just rotate it backwards. In this case, the engaging part 10 detaches from the engaged part 7 while elastically deforming the engaged part 1, and
Only the paper path cover 3 can be rotated in the opening direction. Then, the paper passage cover 3 is opened, printing paper is supplied to the paper passage 6 extending from the rear end of the housing 1 to the printing section, and the paper passage cover 3 is closed. The printing paper supplied to the printing section is wound around the platen 4, printed between the platen 4 and the print head 5, and then sent out from the rear end of the housing 1 through the paper path 6 again.

Next, when replacing the ribbon or performing maintenance inspections on the print head 5 or the carrier (not shown) on which it is mounted,
All you have to do is rotate the printing section cover 2 backward. In this case, the protrusion 8 of the printing section cover 2 escapes from the recess 9 on the housing 1 side while being elastically deformed. Furthermore, when the printing section cover 2 is rotated, the paper path cover 3 overlapping it will naturally also be rotated, but since the rotation center positions of the two force bars 2 and 3 are different, FIG. As shown by the imaginary lines, the rotation trajectories of the engaging portion 10 and the engaged portion 7 are different. Therefore, unless the engaged state between the engaging part 10 and the engaged part 7 is released, neither cover will be able to rotate, but the sliding surfaces 12 and 13 will slide against each other and the engaged part 7 will be To deform elastically,
As shown in FIGS. 6 and 7, the engaging portion 10 is connected to the engaged portion 7.
It is released, and the double-edged blade can be rotated. That is, the printing part cup <-2 and the paper path cover 3 are arranged as shown by the imaginary lines in FIG.
It will rotate as 1/.

Therefore, according to this printing device, since the printing section cover 2 opens rearward, the printing section cover 2 does not get in the way when replacing the ribbon or performing maintenance and inspection of the printing head 5 or the carrier section. In addition, both the print section cover 2 and the paper path cover 3 open rearward, and when the print section cover 2 is rotated in the opening direction, the print section cover 2 and the paper path force /<-3 open together. As a result, mulberry production improves. Further, the engagement between the engaging portion 10 and the engaged portion 7 allows the paper path cover 3 to be stably held in the closed position.

〔Effect of the invention〕

As described above, in the printing device according to the first invention, the rotation center line of the paper path cover is placed at a rear position from the rotation center line of the printing unit cover, and each cover has a printing unit cover that rotates in the opening direction. The paper passage cover is configured so that the printing section cover and the paper passage cover can be opened together by providing sliding surfaces that slide against each other when the sliding surfaces are sliding together, and the paper passage cover is the printing section cover. Even though it is disposed overlapping the paper path cover, when the printing section cover is rotated, the paper path cover can also be rotated together, improving operability.

Further, in addition to the configuration of the first invention, the printing device according to the second invention provides a retaining portion on the paper path cover and an engaged portion on the printing portion cover, and closes the paper path cover by the engagement of these portions. The engagement part and the engaged part are disengaged from each other by sliding of the sliding surfaces, and both force bars are opened as a unit. Even though the two force bars are provided with a fixed part and a fixed part, both force bars can be rotated together, and operability can be improved.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention. Fig. 1 is an external perspective view of a printing device, Fig. 2 is a side view with a part of the printing device cut away, and Fig. 3 is a printing unit cover and paper sheet. Figure 4 is a cross-sectional view taken along line IV-N in Figure 3, Figure 5 is an exploded perspective view of the same part as Figure 3, and Figures 6 and 7 are cross-sectional views showing the secured state of the passage cover. FIG. 4 is a cross-sectional view of the same portion as FIG. 3, showing a process when both force bars rotate together in the opening direction. 1... Housing, 2... Print section cover, 3... Paper path cover, 4... Platen, 5... Print head, 6
. . . paper path, 7 . . . engaged portion, 10 . . . engaging portion, 12° 13 . . . sliding portion. Applicant's agent Patent attorney Takehiko Suzue Figure 5 Figure 5 Commissioner of the Patent Office Kazuo Wakasugi 1, Indication of the case Special application UA58-*52S43 (35G) Tokyo Electric Co., Ltd. 4, Agent 5, Voluntary class 1 Positive

Claims (1)

[Scope of Claims] (1) A housing that houses a printing unit consisting of a platen and a print head facing the platen and has an open top surface, and a rear end rotatably supported on the top of the housing. a printing section cover that covers the printing head accommodating section, and a housing that overlaps the printing section cover and has a rear end rotatably pivoted to the upper part of the casing at a position rearward from the rotation center line of the printing section cover. A paper path cover that covers the area between the rear end of the body and the printing section and forms a paper path through which printing paper passes inside, and a printing section cover that is formed on each of the printing section cover and the paper path cover and rotates in the opening direction. A printing device (2) characterized by having a sliding surface that slides against each other when moving and enables a printing unit cover and a paper path cover to open integrally. A casing that houses a printing section consisting of a print head and has an open top surface; a printing section cover whose rear end is rotatably supported on the top of the casing and covers the printing head accommodating section; and this printing section cover. The rear end is rotatably pivoted on the upper part of the housing located at a rearward position from the rotational center line of the housing, and the rear end is rotatably supported on the printing part cover to cover the space between the rear end of the housing and the printing part and to the inside. a paper passage cover forming a paper passage through which printing paper passes; a retaining part formed on the paper passage cover; and an engaging part formed integrally with the printing part cover when the printing part cover is in the closed position. a secured portion that engages with the paper path cover to hold the paper path cover in the closed position, and a secured portion that is formed on each of the printing section cover and the paper path cover and that slides against each other when the printing section cover rotates in the opening direction. It is characterized by comprising a sliding surface that elastically deforms at least one of the mating part and the engaged part to release the binding thereof and enable the printing part cover and the paper path cover to open integrally. Printing device. (3) The printing device according to claim (2), wherein the locking portion has a spherical shape, and the locked portion is elastically deformable.