JPS60172576A - Printer - Google Patents

Abstract

PURPOSE:To obtain a flat head type printer of which the cover can not be opened in midway of recording, by constituting the same so that the lock of a cover is released only when a reciprocally moving carriage is present at a stand- by position. CONSTITUTION:A carriage 4 moves to right and a recording head 6 is driven to perform recording. When the projection 4a of the carriage 4 is separated from a lock lever 8, the lock lever 8 is revolved to a counterclockwise direction and the free end thereof is inlaid with the groove 22a of lock pin 22 and a cover 32 holds a closed state by the lock lever 8 and a lock pin 22. Unless one line recording is finished and the carriage 4 is returned to a stand-by position, the interruption of recording is not generated. When it is desirable to open a cover 32 on the way of printing, the carriage 4 may be returned to the stand-by position by depressing a printing stopping button and the lock lever 8 may be separated from the lock pin 22 through the projection 4a.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a printer, and more particularly to a printer having a structure in which the print head and platen are separated by opening the printer cover.

[Prior art]

In general, printers employ a method in which recording paper is fed by winding it around a platen.

On the other hand, flatbed printers that feed the recording paper horizontally without folding it have been gaining popularity in terms of ease of loading the recording paper and reliability of paper feeding.

However, with this flatbed printer, when the cover is opened to load the recording paper, the print head and platen are separated, so if the cover is opened during recording, the printer stops printing midway through, causing the printer to shuffle. be.

Therefore, we installed a switch that detects when the cover is opened or closed.
- A printer has been proposed that detects when the cover is opened and stops recording, but if the structure allows the platen to move away, printing becomes impossible the moment the cover is opened, so this method is not reliable. .

[[]1] The present invention has been made in order to eliminate the above-mentioned drawbacks of the conventional technology.The present invention is made to prevent the cover from being opened during recording (printing), so that recording cannot be performed from the middle. The purpose of the present invention is to provide a printer that can prevent the above problems.

〔Example〕

Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings.

1 and 2 show a flatbed type printer according to the present invention.

This printer 30 has a main body case 31 and a cover 32 that can be opened and closed, and an operation panel 33 is provided on the main body case 31 side.
is provided.

8/1 A board 1 serving as a foot is fixed on the main body case 31, and an upper plate 15 is fixed on the lower part 1rj of the cover 32.

Details of the substrate 1 and cover 15 are shown in FIG. 3 and subsequent figures.

In FIG. 3, the reference numeral 1 indicates a board, which is formed into a quadrilateral shape, and lock pins 2, 2 are protruded from the left and right sides of the upper surface of the board.

Each lock pin 2 is formed into a warhead shape, and an annular ring 822 is formed in the middle thereof.

Furthermore, protrusions 3 are protruded from both left and right ends of the other end of the substrate 1, and protrusions 3++ are protruded from the inside of each protrusion 3.

On the other hand, reference numeral 4 denotes a carriage, which is mounted so as to be movable in the horizontal direction by means of two guide bars 5.degree.5 arranged horizontally below the substrate.

A recording head 6 is provided on the upper surface of the carriage 4 so as to be located above the substrate 1 .

Further, a protrusion 4a for unlocking is provided on the side of the carriage 4.
is installed protrudingly.

Further, on the timing position side of the carriage 4, a lock lever 8 is rotatably supported at one end via a pin 9.

This lock lever 8 is given a rotational force in the counterclockwise direction in FIG. 1 by a spring (not shown), and its free end side is constantly rotated in the direction of the carriage 4.

On the other hand, the one indicated by the reference numeral 7 is an endless belt, one end of which is hung around a pulley 10 rotatably supported by a shaft 11, and the other end is hung around a pulley 10 fixed to the output shaft of a stepping motor 12. It is hung on 13.

The carriage 4 is fixed to a part of the belt 1, and when the stepping motor 12 runs the sliding door, the carriage 4 is moved and the recording head 6 is moved to a predetermined position.

On the other hand, what is indicated by the reference numeral 14 is a paper feed roller, which has an opening 1a formed in the vicinity of the lock pins 2, 2 of the substrate 1.
It is being concentrated upwards.

By the way, what is indicated by the reference numeral 15 is the upper plate, which has the same size as the substrate 1, and has a through hole 15+ for fitting two ij Aftft solo lock pins on the left and right sides of one end thereof. .

Projections 15c are still protruding from both the left and right ends of the other end of the upper plate 15, and these projections 15c have cutouts 15b that are engaged with the projections 3a on the substrate 1 side by 1°. It's bright.

There is an opening 1 in the center of the top plate 15 for checking records.
5d is formed.

A platen 16 is arranged facing this opening i5d.

The platen 16 is, for example, an ink platen made of a sintered nylon body impregnated with ink.

When such an ink platen is used, the recording head 6 is provided below the ink platen, and a recording paper J is used between the recording head 6 and the ink platen to perform recording.

At this time, the wire of the recording head 6 protrudes, and the recording paper 1)
Recording is performed by pressing the ink platen against the ink platen. - On the other hand, the one indicated by No. 91 17 is a pinch roller, which is rotatably supported on the free end side of the leaf spring 18, and is rotatably supported on the free end side of the leaf spring 18.
It faces downward from an opening 15e formed on the side, makes contact with the paper feed roller 14, pinches a recording paper (not shown), and rotates the paper feed roller 14 by a motor (not shown), so that the paper jγ, do the following.

This pinch roller 17 is pressed against the paper feeder 90-ra 14 by a leaf spring 18.

On the other hand, the reference numeral 19 is an opening/closing lever, one end of which is supported by a barb 120 on the upper plate 15 side so as to be able to rotate freely.

Further, the free end 1 side of the opening/closing lever 19 is called a trench in a position where the through hole 15a is closed, and furthermore, a force is applied by a spring (not shown) in the direction of closing the through hole 15a. .

In addition, several open/close buttons 21 are provided on the outer side of the open/close lever 19 in the middle.

Another lock pin 22 is protruded from the lower surface of the upper plate 15 at a position corresponding to the free end of the lock lever 8.

An annular groove 22.1 is provided near the lower end of this lock pin 22.
is formed.

Next, the operation of this embodiment configured as above will be explained.

Without unscrewing, the recording paper is placed on the substrate 1 with the tray plate 15 opened around the protrusion 3a, and when the upper plate 15 is closed, the lock pin 2 is fitted into the through hole i5a and the opening/closing lever 19
is moved by the upper end of the lock pin 2 in the direction away from the through hole 15a, and eventually the tip of the opening/closing 1/bar 19 is moved into the groove 2a.
is fitted inside.

On the other hand, in this state, since the carriage 4 has returned to the initial position, the protrusion 4 as shown in FIG. 4(A)
a pushes the lock lever 8, and its free end
), it is located away from the lock pin 22.

In this state, if the opening/closing button 21 is pushed inward, the opening/closing lever 19 is separated from the groove 2a of the lock pin 2, so that the cover 32 can be opened freely.

On the other hand, when recording a statement, the stepping motor 2 is rotated and the carriage 4 begins to move to the right in FIG.
I will be attacked.

5, the protrusion 4a of the carriage 4 separates from the lock lever 8 as shown in FIG. 5(5). Then, due to the force of a spring (not shown), the lock
i, The lock lever 8 is rotated in the counterclockwise direction in the figure.
The free end of the lock pin 22 is fitted into the groove 22a of the lock pin 22 as shown in FIG. 5(B).

In other words, the lock lever 8 and the lock pin 22 keep the cover 32 closed.

If recording is started in this way, the cover 32 will be completely locked and will not open, and recording will not be interrupted midway.
The recording will not be interrupted until the recording of one line is completed and the carriage returns to the initial position.

In addition, when one recording extends over several lines, the turning position on the timing position side of the carriage may be set to a position where the protrusion 4a does not come into contact with the lock lever 8, as shown in FIG. 5(5).

If you wish to open the cover 32 during printing, you can press a printing stop button (offline button) not shown. The data transfer is interrupted, the carriage 4 is returned to the original position, and the terror lever 8 is separated from the lock pin 22 via the protrusion 4a, as shown in FIGS. 4(A) and 4(B).

〔effect〕

As is clear from the above description, according to the present invention, the cover is unlocked only when the reciprocating carriage is at the timing position, so the cover cannot be opened during recording. There are no inconveniences such as stopping recording.

[Brief explanation of the drawing]

The figures are for explaining one embodiment of the present invention. Fig. 1 is a perspective view with the cover open, Fig. 2 is a perspective view with the cover closed/this state, and Fig. 3 is an exploded perspective view of the main parts. Figure, Figure 4 (A)
, (13) is a plan view and a side view when the lock lever and lock pin are not engaged, FIG. 5 (Δ),
(+3) is a plan view and a side view when the lock lever and the lock pin are in a locked state. 1... Board 2.22... Lock pin 4... Carriage 6... Recording head 7... Belt 8... Lock lever 15... Cover 16... Platen 11... Pinch roller 19...Opening/closing 1/bar 21
... Open/close button Figure 4 (A) 9 Shade Figure 5 (A)

Claims (1)

[Claims] In a printer equipped with a recording head mounted on a carriage that reciprocates in the direction of the printing digits, and a cover that is openable and closable with respect to a substrate on which the recording head is installed and has a platen at a position corresponding to the recording head, A printer characterized in that a locking means for holding the cover in a closed state is provided at a standby position of the carriage, and the locking means is configured to be unlocked only when the carriage is at the standby position e. .