JP2002358756A - Tape cassette - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tape cassette, with which much more identification information can be transmitted under fixed reliability. SOLUTION: A magnetic tape cassette 10 has parallel recessed parts 50A-50D on the back side of a lower half 14 comprising a cassette case. The depth positions of bottom faces 52A-52D of the recessed parts 50A-50D are not uniform and the recession of the parts 50B and 50D is deep. When the magnetic tape cassette 10 is loaded into a deck 48, probes 54A-54D arranged on the magnetic tape cassette 10 respectively enter the recessed parts 50A-50D. The probes 54A and 54C are respectively pressed by the bottom faces 52A and 52C and the probes 54B and 54D are not pressed. Therefore, the deck 48 reads the identification information detected by a combination of pressing and non-pressing of the probes. Thus, the quantity of identification information can be remarkably increased even without newly providing the recessed part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tape cassette in which identification information is read by a concave portion formed on an outer wall surface.

[0002]

2. Description of the Related Art In general, in audio equipment and video equipment, a magnetic tape cassette for recording and reproducing data while holding a magnetic tape wound around a pair of reels in a cassette case so as to be able to run is often used.

By the way, as shown in FIGS. 11 and 12,
The case 73 constituting the magnetic tape cassette 70 includes a plurality of recesses (ID holes) 80A to 80D for transmitting identification information such as system differences, tape thickness, and tape type.
Are formed side by side on the rear side as identification holes. The concave portions 80A to 80D are formed with a uniform bottom depth. Deck 78 into which the magnetic tape cassette 70 is loaded
When the magnetic tape cassette 70 is loaded,
Probes 84A to 84D are provided, which are respectively pressed by the bottom surfaces 82A to 82A to 82D of the probes 84A to 84D.
When D is pressed, the deck 78 reads identification information (differences in system, tape thickness, tape type, etc.).

If it is desired to further increase the identification information due to a new system or the like, the recess 80 is required.
Is difficult to provide due to space limitations.
There has been a problem that the amount of identification information cannot be increased.

[0005] As a countermeasure, it is conceivable to provide a resistive element or a storage element to receive an electric signal in a contact manner to obtain identification information. And the electric signal is not transmitted correctly due to fluctuations in the data, and therefore, correct identification information may not be obtained, and there is a problem that reliability is low.

This problem has occurred not only with magnetic tape cassettes but also with general tape cassettes.

[0007]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a tape cassette capable of transmitting more identification information with certain reliability in consideration of the above fact.

[0008]

According to the first aspect of the present invention, the cassette has a plurality of identification recesses on the outer wall surface thereof, and the plurality of identification recesses are provided in the loading device when the cassette is loaded in the loading device. By the probe is pressed against the bottom surface of the concave portion, the loading device is a tape cassette that reads identification information, the depth position of the bottom surface of the concave portion is changed,
A part of the plurality of probes is not in contact with the bottom surface of the concave portion, and the loading device reads identification information based on a combination of pressing and non-pressing of the probe.

Thus, even if a new concave portion is not provided,
The amount of identification information can be significantly increased.

The case is generally made of resin and is formed by injection molding. Therefore, the depth position of the bottom surface of the concave portion can be changed by adjusting and manufacturing the shape of the mold portion forming the concave portion in advance.

When the nest forming the recess is detachable from the mold, the depth position of the bottom surface of the recess can be changed by mounting the nest having different lengths on the mold. This eliminates the need to significantly change the mold.

Further, even if the concave portion is formed in a so-called toothless shape, the amount of identification information can be increased.

In order to use the tape cassette according to the first aspect, it is necessary to change the detection system provided in the loading device. In this case, when a tape cassette having a concave portion for identification formed on the outer wall surface is loaded into the loading device, the bottom surface of the concave portion comes into contact with and presses the probe of the loading device so that the loading device reads the identification information. In the identification information detection system, by changing the depth position of the bottom surface of the concave portion, a part of the plurality of probes is made non-contact with the bottom surface of the concave portion, and the identification information by a combination of pressing and non-pressing of the probe Is generally a detection system in which the loading device reads out.

[0014]

Embodiments of the present invention will be described below with reference to embodiments. As shown in FIG. 1 and FIG. 2, a magnetic tape cassette (D
The VC-P or set) 10 includes an upper half 12 and a lower half 14 that constitute a case.

Inside the case formed by the upper half 12 and the lower half 14 are a lower flange 24, a hub 26 integrally fixed on the upper side of the lower flange 24, and a hub 2.
A pair of reels 20 composed of an upper flange 28 mounted on the upper side of the reel 6 are rotatably supported by a shaft. A magnetic tape (not shown) is wound around the pair of reels 20. I have. The lower flange 24, the hub 26, and the upper flange 28 are all formed of resin.

An engaging tooth 32 for transmitting a rotational force is formed on an outer peripheral portion of the lower flange 24. The upper half 12 is provided with a window 13 (see FIG. 1) made of a transparent plate.

The upper half 12 is provided with a pair of reel urging leaf springs 36 formed by bending a band-shaped metal. The reel biasing leaf spring 36 has an arm 38 and a base end 40, and the base end 40 is fixed to the inner surface of the upper half 12. Accordingly, the reel biasing leaf spring 36 is
The cantilever is supported on the inner surface of the upper half 12 and the arm 38
Urges the corresponding reel 20 toward the lower half 14.

As shown in FIG. 2, a plurality of identification recesses (ID holes) 50 are formed side by side on the back side of the lower half 14. The depth of each recess is not uniform, the depth d1 of the recess 50A and the recess 50C is shallow, and the depth d2 of the recess 50B and the recess 50D is deep.

As shown in FIG. 3, the magnetic tape cassette 1
0 is loaded on the deck 48, the bottom surface 52A of the concave portion 50A is attached to the tip of the probe 54A provided on the deck 48.
Is provided at the tip of the probe 54C at the bottom surface 52C of the concave portion 50C.
However, the probes 54A and 54C are pressed against each other. At this time, since the bottom surfaces of the concave portions 50B and 50D do not abut on the tips of the probes 54B and 54D, the probes 54B and 54D are not pressed. Identification information by the combination of pressing and non-pressing of each probe (system differences, tape thickness, tape type, cassette type, etc.)
Is read by the deck 48.

As described above, the number of types of identification information that can be detected can be increased by the number of combinations of pressing and non-pressing of the probe as compared with the related art. For example, FIGS.
By changing the depth position of the bottom surface of the concave portion as a parameter as shown in (1), probes to be pressed and non-pressed are different, and different identification information can be transmitted to the deck 48. Thus, the amount of identification information can be significantly increased without newly providing an identification hole.

The number of unpressed probes is not limited to two, and may be one, for example, as shown in FIGS. 7 and 8, or three as shown in FIGS. Is also good.

In the above description, four recesses (identification holes) are arranged. However, the number of recesses may be more or less than four and is not particularly limited. It is also effective to provide the recess in a toothless manner.

[0023]

According to the present invention, a tape cassette capable of transmitting more identification information with a certain reliability is realized.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a magnetic tape cassette according to an embodiment of the present invention.

FIG. 2 is a perspective view of a magnetic tape cassette according to one embodiment of the present invention.

FIG. 3 is a partially enlarged cross-sectional view illustrating an example of an identification hole (recess) of the magnetic tape cassette according to one embodiment of the present invention.

FIG. 4 is a partially enlarged cross-sectional view showing another example of the identification hole (recess) of the magnetic tape cassette according to one embodiment of the present invention.

FIG. 5 is a partially enlarged sectional view showing another example of the identification hole (recess) of the magnetic tape cassette according to one embodiment of the present invention.

FIG. 6 is a partially enlarged cross-sectional view showing another example of the identification hole (recess) of the magnetic tape cassette according to one embodiment of the present invention.

FIG. 7 is a partially enlarged cross-sectional view showing another example of the identification hole (recess) of the magnetic tape cassette according to one embodiment of the present invention.

FIG. 8 is a partially enlarged cross-sectional view showing another example of the identification hole (recess) of the magnetic tape cassette according to one embodiment of the present invention.

FIG. 9 is a partially enlarged cross-sectional view showing another example of the identification hole (recess) of the magnetic tape cassette according to one embodiment of the present invention.

FIG. 10 is a partially enlarged cross-sectional view showing another example of the identification hole (recess) of the magnetic tape cassette according to one embodiment of the present invention.

FIG. 11 is a perspective view of a conventional magnetic tape cassette.

FIG. 12 shows an identification hole (recess) of a conventional magnetic tape cassette.
FIG.

[Explanation of symbols]

 Reference Signs List 10 magnetic tape cassette (tape cassette) 48 deck (loading device) 50A-D concave portion 52A-D bottom surface 54A-D probe 70 magnetic tape cassette (tape cassette) 78 deck (loading device) 80A-D concave portion 82A-D bottom surface 84A- D probe

Claims (1)

[Claims] 1. A cassette has a plurality of recesses for identification on its outer wall surface, and when loaded in a loading device, a plurality of probes provided in the loading device are pressed against the bottom surface of the recess. Thus, the loading device is a tape cassette that reads identification information, and changes a depth position of a bottom surface of the concave portion so that a part of the plurality of probes does not abut on a bottom surface of the concave portion. A tape cassette, wherein the loading device reads identification information based on a combination of pressing and non-pressing of a probe.