JPS60196389A - Cassette holder - Google Patents

Abstract

PURPOSE:To enable detection of the presence or absence of a cassette, by a construction wherein an ejecting means energized by a spring so as to push out a cassette is provided at a cassette plating part, and is operated in conjunction with a limit switch, in a printer or the like. CONSTITUTION:When fitting the cassette, first a guide hole provided in the bottom surface of the cassette 1 is mated to a guide pin, and then the cassette 1 is depressed down, whereby a projection 1a rides over a fastening projected part 22 against a spring, and is fastened. At this time, a horizontal lever part 31 of the ejecting means 30 is depressed down to the level of the top surface of the cassette holder 10 against a spring 35, thereby moving a contact lever 41 of the limit switch 40 downward, so that the switch 40 is turned ON, and the fitted condition of the cassette 1 is detected. When detaching the cassette 1, a lever 20 of a fastening means 15 is depressed down against the spring, whereby the engagement of the projected part 22 and the projection 1a is released, the cassette 1 is ejected upward by an upward pressure exerted on the horizontal lever part 31 by the spring 35, and the limit switch 40 is turned OFF.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a holding device for locking and holding a cassette in a use position.

[Prior art]

Conventionally, long materials such as various ribbons or tapes, such as ink ribbons used in printers and magnetic recording tapes used in recording and reproducing devices, have been used for various purposes, such as ink ribbons used in printers and magnetic recording tapes used in recording and reproducing devices. For convenience, it is often rolled up and placed in a cassette.

When the cassette is used, the cassette is held at a predetermined position on the device, and the wound ribbon or tape inside is rewound and made to run by a predetermined drive means of the device, and the running ribbon or tape is used for marking the device. It is wound up through the head section or the recording/reproducing head section. A cassette holding device is attached to the device for mounting such a cassette. The cassette holding device generally has a locking means for locking the cassette in the mounted state.

By the way, the cassette holding device is sometimes provided with an eject means in order to improve the operability when removing the cassette from the holding device by releasing the locking by the locking device. In other words, the locking force is weaker than the locking force of the locking means.
This means applies a spring force to the cassette so as to push out the cassette.

Further, it may be desirable to provide the cassette holding device with means for detecting whether or not a cassette is attached. For example, such a detection means may have an important meaning in an ink ribbon cassette holding device of a thermal printer. In other words, in a thermal printer, a plurality of dot-shaped heating elements are supported in a vertical line, and the dots are printed via an ink ribbon coated with ink that melts when heated. Printing can be performed by moving the paper in the lateral direction while pressing it against the paper, and causing appropriate dot-shaped heating elements to generate heat at appropriate times.

In such a thermal printer, the ink ribbon holding device is provided with a driving means for moving the ink ribbon as described above, but its driving source is a driving source for moving a cartridge having a printing, a cassette holding device, and a cassette holding device. Often shared. Incidentally, ink running is performed only in one direction because the unused portion of the ribbon must be fed to the printing head. On the other hand, the movement must be carried out in both left and right directions. Therefore, in a thermal printer using an ink ribbon, printing is normally performed only when the gear is traveling to the right, and not when the gear is traveling to the left. However, in thermal printers, ink +7, l? Printing can also be carried out using thermal paper containing a substance that develops color when heated as the printing paper without using a dye. Because this method does not require coin cribbing, printing can be performed while the carriage moves in both left and right directions.Therefore, in order to execute these two methods with the same thermal printer, it is necessary to print on the print head. It is necessary to switch the input method of Nodame's electrical signals.For this reason, K detects whether or not the incremental cassette is placed on the cassette holding device, and if it is placed, it prints only in one direction. Just do it.

[Purpose of the invention]

SUMMARY OF THE INVENTION In view of the above-mentioned prior art, it is an object of the present invention to provide a cassette holding device that is capable of simultaneously ejecting a cassette and detecting whether or not the cassette is attached or detached.

[Reason for the invention]

According to the present invention, the above-mentioned object is achieved by providing an eno-extracting means on the cassette mounting portion, which is biased by a spring so as to push out the cassette, and by interlocking the eno-extracting means with a limit switch. Ru.

[Embodiments of the invention]

Hereinafter, the present invention will be described in detail with reference to the drawings.

FIG. 1 is a schematic plan view showing an integrated example of a cassette holding device according to the present invention, and this is a specific example applied to a thermal printer. 2 is a schematic side view of FIG. 1 viewed from the entrance direction, and FIG. 3 is a schematic rear view of FIG. 1 viewed from direction B. In these drawings, the installed cassette 1 is indicated by a two-dot chain line, and the print head 2 is also illustrated. In the figure, the upper surface of the holding device main body 10 includes a driving rotation shaft 11 for driving the ink ribbon;
Idbin 12 is used for positioning when installing the Incritin cassette. '13 is attached protrudingly. A cassette locking means 15 is also provided on the upper surface of the holding device main body 10.

The locking means 15 rotatably fixes the bottle 18 to two supporting parts 16 and 17 protruding from the upper surface of the holding device main body 10, and attaches two lever parts to the locking means 18. A member consisting of these connecting portions 21 is fixed, a cassette locking protrusion 22 is provided approximately in the center of the connecting portion 21, and the lever i1
In 9.20, the structure in which the torsion springs 23 and 24 are attached to the bottle 18 is designated as M. FIGS. 4 and 5 are a sectional view taken along the line IV--IV and a sectional view taken along the line 1--2, respectively, showing the locking means 15. As is clear from these figures, one end of the torsion spring 23 is brought into contact with the lever part 19, and the other end is brought into contact with a protrusion 25 provided on the upper surface of the main body 10. The same applies to the torsion spring 24. On the other hand, the lower end of the connecting bar 621 has a defect in the protrusion 25 .

FIG. 6 is a cross-sectional view taken along the line V+-V+ in FIG.

The cassette eject means 30 has a horizontal part 31 and a vertical part 32.
A hand-shaped lever consisting of is rotatably supported around a horizontal pin 34. A torsion spring 35 is attached to the pin 34, and one end of the spring 35 is brought into contact with the lower surface of the lever horizontal portion 3], and the other end is brought into contact with a member of the holding device main body 10. A limit switch 40 is attached below the exhaust means 30. The contact lever 41 of the limit switch 40 is ml
+ 42 is lightly biased upward by a panel, and is brought into contact with the lower part of the lever horizontal portion 31 of the ejecting means. Incidentally, FIG. 7 is a sectional view similar to FIG. 6 with the cassette 1 removed.

In the above cassette holding device, the cassette is mounted in the following manner. First, the guide holes provided in the bottom of the cassette 1 are aligned with the guide pins 12 and 13, and the cassette 1 is pushed down.

As shown in FIG. 5, the rear surface of the cassette 1 has a notch 11 which can be engaged with the projection 22 at a position corresponding to the locking arrow 22 of the cassette locking means. lN I 11 is formed, and as the cassette 1 is further pushed down, the protrusion 1a resists the upward pressing force of the locking arrow 22 based on the springs 23 and 24 of the cassette locking means. It extends beyond the protrusion 22 and reaches below it. After that, the cassette 1 is attached to the locking means 1.
It is locked in a state where it is pushed forward and downward by the lower part of the stop projection 22. At this time, the cassette enoect means 30
moves from the state shown in FIG. 7 to the state shown in FIG. In FIG. 7, the lever horizontal portion 31 of the eject means 30 is connected to the spring 3.
5 to the upper blade, but its position is determined by the vertical part 32 of the lever being pushed against the wing of the main body 10 of the holding device. In this state, the limit switch is OFF, and it is thereby detected that the cassette 1 is not installed. and,
When the cassette is attached, the upward pressing force of the lever horizontal portion 31 of the eject means based on the spring 35 and the spring of the limit switch contact lever 41 is
Since the locking arrow part 22 of No. 5 is formed to be weaker than the force pushing the cassette 1 downward, the lever horizontal part 31 is pushed down to the upper surface position of the holding device main body 10, and after the cassette is installed, the force shown in FIG. The state will be as follows. In this state, the limit switch is ON, and it is thereby detected that the cassette 1 is installed.

The cassette is removed from the gamma holding device in the following manner. That is, when the lever portion 19 or 20 of the locking means 15 is pushed downward to release the lock between the locking protrusion 22 and the arrow head 1a of the cassette 1, the upper part of the lever horizontal portion 31 of the ejector 30 is released. Due to the pressing force, the case set 1 is ejected upward. As a result, the cassette extractor moves from the state shown in FIG. 6 to the state shown in FIG. 7, contrary to when the cassette is installed.

In this way, by detecting the cassette-mounted food,
Malfunctions caused by switching printing methods in a thermal printer can be completely prevented.

In the above embodiments, the cassette holding device of the present invention applied to a thermal printer has been explained, but the device of the present invention can also be applied to other cassette loading devices, such as stopping the drive when no cassette is loaded. It can be used for further control, and its application range +1::]
iIj: In particular the above implementation [(not limited to l).

〔Effect of the invention〕

According to the present invention as described above, since the ENOEC L-mechanism and the cassette attachment/non-installation detection model are implemented in one unit,
Con A of the equipment hill? This makes it possible to reduce costs and reduce costs.

[Brief explanation of drawings]

Fig. 1 is a plan view of the cassette locking device Kt of the present invention, Figs. 2 and 3 are its A and B main views, respectively, and Fig. 4, Fig. 5, and Fig. 6 are IV-IV partial sectional view, ■-■ partial sectional view and ■- in Fig. 1, respectively.
(2) Parts W and Lr are also included in the drawings, and FIG. 7 is a partial cross-sectional view similar to FIG. 6 for explaining the operation of the eno-extracting means. 1: Cassette, 1a: Protrusion, 2: Print head, 10: Main body, 1]; Drive rotation shaft, 12. 13: Guide bin, 15
: Locking means, 16.17: Support part, 18: Bin, 19.
20 Nirepa part, 21: Connecting part, 22: Locking protrusion,
23, 24: torsion spring, 25: protrusion, 3o: eject means, 31 horizontal part, 32 vertical part, 34: bottle, 35: torsion spring, 4o: limit switch, 4]: contact lever, 42 :shaft. Fig.1

Claims (3)

[Claims] (1) In a device for locking and holding a cassette,
A cassette holding device characterized in that the cassette mounting portion is provided with an ejecting means that is biased by a spring so as to push out the cassette, and a limit switch that is linked to the movement of the ejecting device is provided. Device. (2) The cassette holding device according to item 1, wherein the eno-extracting means has a lever, and the contact lever of the limit switch is pressed against the lever. (3) A first device having an ejecting means operated by a spring built into the limit switch via a contact lever.
Section cassette holding device.