JPH0521756Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a cassette for accommodating various recording media such as magnetic tape, magnetic disk, or projection film, and particularly to a cassette equipped with a storage mechanism for storing various states of the stored recording media. .

For example, a magnetic tape cassette is provided with a mechanism for storing the state or type of magnetic tape contained therein to prevent erroneous erasure after recording. This storage mechanism for preventing accidental erasure consists of forming a window hole on the circumferential surface of the cassette, protruding from this window hole to prevent accidental erasure, and opening the window hole by breaking the nail. The lever on the transport side of the tape recorder is inserted so that if it is a mechanical operation button, the record button cannot be pressed, and if it is an electric operation button, the erasure and recording circuits are not activated even if the record button is pressed. It is composed of In addition, as a tape type storage mechanism, a window hole is provided next to or further away from the above-mentioned accidental erasure prevention claw, and a lever is prepared on the transport side as in the case of accidental erasure prevention, and the cassette is When installed, a lever is operated by a window hole to detect the type of magnetic tape contained, and the bias and equalizer are switched.

In case of a cassette with a break-off type of accidental erasure prevention storage mechanism, once the claw is broken off, it will no longer be possible to record on the contained magnetic tape again. Adhesive tape was pasted on the window hole that was opened when it was removed, and recording was done by opening the window hole and preventing the insertion of the lever on the transport side.
However, during recording, the lever on the transport side is pressed against the closed adhesive tape by the required biasing force, so the adhesive tape breaks after recording is repeated several times, and the adhesive tape must be replaced each time. This is time-consuming and may cause the adhesive tape to break during recording, causing the lever to enter the window hole and interrupting recording.

Therefore, in the past, a piece was removably fitted into a window hole formed on the periphery of the cassette to prevent accidental erasure, and if it was necessary to prevent accidental erasure after recording, the piece was removed from the window hole and recorded again. In this case, fit the piece into the window hole again to make it ready for recording, or form a notch in the cassette, attach the sliding piece so that it can come out and go out freely, and when in the recording state, put the sliding piece in the notch. If it is necessary to prevent erroneous erasure after recording, the sliding piece is retracted from the notch and the lever on the transport side is engaged with the notch, so that the recording operation cannot be performed. was proposed. However, in the former case where the piece is attached to and removed from the window hole, there is a risk of losing the piece, and in the latter case where the sliding piece is operated by sliding, a locking member for the sliding piece cassette is required. Since the unlocking direction of the locking member and the sliding direction of the sliding piece are different, the configuration of the transport side in which the cassette is mounted becomes complicated and takes up space, and the configuration of the cassette itself is also complicated. It was hot.

The present invention has been devised in view of these points, and particularly provides a recording medium storage cassette that allows for easy storage switching operations between recordable and non-recordable states, and also enables reliable detection of each state. This is what we provide.

That is, in the present invention, through-holes are formed on both the front and back sides of a required portion of the cassette case, a cavity is formed between the through-holes, and a slider is movably fitted into this cavity. By pressing the mover through the through hole, the mover is moved inside the cavity to change the mating position,
The state of the stored recording medium is memorized based on the position of the mover.

Hereinafter, an embodiment in which the present invention is applied to a magnetic tape cassette for a cassette type tape recorder will be described with reference to the drawings.

FIG. 1 shows the entirety of a cassette, a so-called microtape cassette 1. The cassette case 2 is composed of an upper half 2a and a lower half 2b, and the cassette case 2 is composed of an upper half 2a and a lower half 2b. Two through holes 3 are provided in each of the planar parts of the halves 2a and 2b.
a, 3a', 3b, 3b' are bored at appropriate intervals, and the vertically opposing through holes 3a, 3b and 3
Cavities 4 and 4' are formed between a' and 3b'. Click locking portions 5, 5' that protrude inward are formed at the abutting edges of the upper half side portions 4a, 4a' and the lower half side portions 4b, 4b' of the hollow portions 4, 4'. The parts 4 and 4' are divided into an upper half side and a lower half side in a communicating state, and the upper half 2a and the lower half 2
A window hole 6 communicating with the cavities 4 and 4' is provided on the rear end surface of b.
6' is formed.

In this way, the upper and lower halves 2a of the cassette case 2,
A spherical slider 7, 7' is fitted into either the upper half side portions 4a, 4a' or the lower half side portions 4b, 4b' of the hollow portions 4, 4' formed between the cavities 4, 2b. Side 3a, 3a' or through hole 3 on the lower half side
Insert the protrusion 8, 8' through the through hole corresponding to either one of b, 3b', that is, the part of the cavity 4, 4' into which the sliders 7, 7' are fitted, and By pushing the sliders 7, 7', the sliders 7, 7' are moved over the click locking parts 5, 5' to the other part of the cavities 4, 4'.

The movers 7, 7' can be seen through the window holes 6, 6', and their moving positions can be detected. Also, the position of the movers 7, 7' is detected by the upper and lower halves 2a,
This can also be done from the through holes 3a, 3a', 3b, and 3b' side of 2b.

That is, when detecting the movers 7, 7' through the window holes 6, 6', the upper half portions 4a, 4 of the cavities 4, 4'
a' or lower half portions 4b, 4b' with movers 7, 7'
When detecting the presence or absence of will be detected.

Therefore, various status information of the stored magnetic tape is stored depending on the fitting position of the movers 7, 7' with respect to the cavities 4, 4'. For example, in the state to prevent erroneous erasure, the movers 7, 7' are fitted into the lower half parts 4b, 4b' of the cavities 4, 4', and in the recordable state, they are moved into the upper half parts 4a, 4a'. If it is set to do so, the detection lever on the transport side can detect the accidental erasure prevention state or the recordable state based on the presence or absence of the movers 7 and 7' or the difference in their insertion depth, and control the recording operation. can.

It goes without saying that the position of the storage mechanism constructed as described above is not limited to the central position of the rear end of the cassette case 2, but may be any position corresponding to the detection lever on the transport side.

Next, a modification of the cavity of the storage mechanism will be described with reference to FIG.

First, FIG. 3A shows the hooking edges 5 of the cavities 4, 4',
5' is formed only on one side, as shown in Figure B.
The upper half parts 4a, 4a' and the lower half parts 4b, 4b' of the hollow parts 4, 4' are formed to be slightly different from each other, and the respective end edges are used as the click locking parts 5, 5'. Yes, C in the same figure shows the hollow parts 4 and 4'.
upper half portions 4a, 4a' and lower half portion 4b,
When the respective end edges of 4b' are bent inward and the click locking parts 5, 5' are formed in a constricted shape, FIG. For example, the upper half portions 4a, 4a' are formed to have the same width in the vertical direction, while the lower half portions 4b, 4b' have edge portions bent inward, and the upper half portions 4a, 4a' have the same width. When the click locking portions 5, 5' are made to face the inside of the edge portion, the same figure E shows the hollow portions 4, 5'.
When only the edge portions of one side of the upper half portions 4a, 4a' and the lower half portions 4b, 4b' of 4' are bent inward to form the click locking portions 5, 5',
In this case, the hollow parts 4, 4' are formed to have a larger diameter than those in the above-mentioned examples, and the supporting pieces 1 are inserted inward from the abutting edges of the upper half parts 4a, 4a' and the lower half parts 4b, 4b'.
4a, 14a' and 14b, 14b' are provided protrudingly, and receiving pieces 24a, 24a', 24b, 24b' are formed at the inner ends thereof, respectively, extending in the direction of the through holes 3a, 3a', 3b, 3b'. When the joints of the receiving pieces are hooked edges 5, 5', FIG. This is a case where it is formed in the same manner as F in the previous example.

Moreover, it goes without saying that various other modifications of the storage mechanism can be considered. Furthermore, the movers 7, 7'
Although shown in FIG.
For example, it is possible to use a structure formed in the shape of a rectangular block having a tapered surface, which can reciprocate between b' with the click locking parts 5 and 5' in between. Furthermore, if the movers 7 and 7' are made of a magnetic material, magnetic detection, for example differential detection, becomes possible.
The detection mechanism on the transport side can be simplified.

It goes without saying that the storage mechanism described above is not limited to the detection of an erroneous erasure prevention mechanism, but can also be applied to detection for determining the type of cassette containing different types of recording media.

As described above, in the present invention, a moving element is fitted into a cavity formed in a cassette case, and the moving element is moved and stored according to the state of the recording medium accommodated in the cassette case, and the moving storage state is is detected on the operating mechanism side and control corresponding to each state is performed, so there is no need to break the claws or attach or detach pieces depending on the state of the recording medium as in the past. Furthermore, the conversion operation of the storage state is extremely simple, and detection in that state can be performed reliably, and the structure is simple and compact, making it particularly suitable as a storage mechanism for microtape cassettes.

In addition, since the slider is spherical, it is easy to manufacture the slider itself, and there is no directionality when fitting it into the cavity of the cassette case, so the slider is simply inserted into the half inner opening of the cavity. The assembly of the cassette is easy, as it can be fitted with an extremely simple operation of just placing it on the cassette and pushing it in. In particular, automatic assembly is possible, which improves productivity and reduces costs.

Furthermore, since the slider is spherical, a click stop can be easily formed within the cavity, allowing the slider to be reliably held in any position, and the position change operation can be performed smoothly like a click, improving operability. It has the following effects.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of an example of a tape cassette to which the present invention is applied, Fig. 2 is an enlarged sectional view taken along the - line in Fig. 1, and Figs. 3 A to G are cross sections showing various modifications of the main parts of the cassette. It is a diagram. In the figure, 1 is a cassette, 2 is a cassette case, and 3 is a cassette.
a, 3a', 3b, 3b' are through holes, 4, 4' are hollow parts,
5, 5' are click locking parts 5, 5', 7, 7' are movers.

Claims (1)

[Scope of utility model registration request] Opposed through holes are formed on both the front and back surfaces of the cassette case, and a cavity is formed between the two through holes for guiding a slider movable in the thickness direction of the cassette. A click locking part for positioning and locking the mover on the front side and the back side of the cassette case is formed integrally with the hollow part at a substantially intermediate position of the hollow part, and one of the front side and the back side is formed integrally with the hollow part. By pressing the movable element located at the hole through the through hole, the movable element is moved over the click locking part and moved within the cavity to change to the other position, and the position of the movable element is on the front side or the back side. A recording medium storage cassette in which the recording state of the recording medium contained in the cassette case is stored.