JPH04181582A - tape cassette - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a tape cassette, and particularly to a tape cassette suitable for a magnetic recording/reproducing device such as a video tape recorder (hereinafter referred to as VTR).

2. Prior Art As shown in FIG. 10, a conventional cassette half 5
In order to prevent erroneous erasing (No. 1), a claw 52 integrally formed on the cassette body is usually broken off to determine whether or not records can be erased. However, this method does not work once the nail 52
If you break it, you will have to replace it with something that corresponds to the broken nail when you want to re-record, and you would normally put tape on it, but the adhesive from this tape would stick out,
This could have an adverse effect on cassettes and recording/playback equipment. Therefore, various configurations that allow repeated recording have been proposed (for example, see Japanese Utility Model Application No. 60-146986).

FIG. 11 is a perspective view of essential parts of the cassette half. 11th
In the figure, 53 is a cassette half, and 54 is a space for checking the presence or absence of an accidental erasure prevention claw 55 provided inside the cassette half 53. When the cassette is in a normal recordable state, the accidental erasure prevention claw 55 is inserted into the cassette half 5.
It is above space 54 of 3. When the cassette has completed recording and cannot be erased or played back, slide the accidental erasure prevention claw 55 through the groove 56 of the cassette half 53 and
It is stored in. When this cassette is to be used for recording again, the accidental erasure prevention claw 55 slides back to its original position and becomes ready for recording.

Problems to be Solved by the Invention However, with the above configuration, there is a problem in that the accidental erasure prevention claw cannot be determined from the rear side of the cassette. It is necessary to check to prevent accidental erasure. This is especially true as VTRs and the like become smaller, and due to space constraints, it becomes a big problem to distinguish from the back side.

In view of the above problems, the present invention provides a tape cassette that determines whether or not erroneous erasure can be prevented from two directions.

Means for Solving the Problems In order to solve the above problems, the tape cassette of the present invention includes:
It has a first opening provided on the back surface of the cassette half, a second opening provided on the bottom surface of the cassette half, and the only moving member that opens and closes both the first and second openings,
It is configured to perform a display operation and a detection operation related to erroneous erasure by moving the moving member.

Effect of the present invention With the above-described configuration, by moving the only moving member, it is possible to detect whether or not erroneous erasure has occurred from the back and bottom surfaces of the cassette half, and it is also possible to determine from the display from the back and bottom surfaces of the cassette half. be.

EXAMPLE Below, regarding a tape cassette according to an example of the present invention, the first example is as follows.
This will be described with reference to FIGS.

FIG. 1 shows a plan view of a tape cassette according to an embodiment of the present invention, FIG. 2 is a rear view, and FIG. 3 is a bottom view of the cassette half.
Figures 4 and 5 show a plan view and rear view of the main parts of the lower cassette half in a state in which information about whether or not accidental erasure prevention is possible can be recorded, and Figures 6 and 7 show the lower cassette half in a state in which recording is not possible. 8 and 9 show a plan view and a back view of the accidental erasure prevention plate.

In FIGS. 1, 2, and 3, 1 is a tape cassette, and 2 is a front cover that covers the front surface of a magnetic tape 3 stretched over the front surface of the tape cassette 1. In FIG.

4a and 4b are supply side wheel hubs for winding the magnetic tape 3;
The winding side reel hubs 5a and 5b are each reel hub 4a,
4b is a leaf spring that urges the tape cassette 1 downward.

6 is an upper cassette half, and 7 is a lower cassette half.

Label areas 8 and 9 are provided on the top and back surfaces of the tape cassette 1.

Reference numeral 10 denotes an erroneous erasure prevention member for checking whether or not erroneous erasure prevention is possible.

Reference numeral 11 denotes a protrusion provided integrally with the erroneous erasure prevention member 10.

Reference numeral 12 denotes a display/detection opening provided on the back surface of the lower cassette half. 13 is a stepped portion provided on the side surface of the lower cassette half.

Reference numeral 14 denotes a display/detection hole provided in the cassette stepped portion 13 for checking whether or not accidental erasing can be prevented from the bottom side of the tape cassette 1, and is connected to the opening 12 provided on the back side.

15, 16, and 17 are positioning holes and notches for positioning the tape cassette 1.

Furthermore, the positioning holes 16 are also used as screw holes for screwing the upper cassette half 6 and the lower cassette half 7 together. In addition, 18a to 18f are cassette detection holes provided on the cassette stepped portion 13. Yes, tape types.

Information such as tape thickness and tape length is determined based on whether or not holes are punched. 19a and 19b are VT of tape cassette 1
This is a grip for suppressing movement of the tape cassette 1 in the B direction during loading of the cassette into R (not shown).

4 to 9, the accidental erasure prevention member 10 has two display/detection sections 10a and 10b, and a lower cassette half 7.
ff7a and a guide portion 20 provided integrally with the lower cassette half.

21 and 22 are changer grips provided on the sides of the upper and lower cassette halves, and positioning holes 1 for positioning.
5.16 and the positioning notch 17.

23 is a mouse into which a tape loading post on the VTR (not shown) enters.

The operation of the tape cassette constructed as described above will be described below.

In FIGS. 4 to 7, FIG. 4 shows the accidental erasure prevention member 10.
is in a position indicating that recording is possible.

That is, the display/display of the accidental erasure prevention member 10 from the opening 12 is
The detection unit 10a is exposed and indicates that recording is possible. In the case of detection on the VTR (not shown) side, the detection unit 10a is detected and it is determined that the recording is possible.

On the other hand, on the bottom part, the display detection hole 14 in the bottom part and the display 'detection part 10b of the erroneous erasure prevention member 10 are misaligned, so the display and 'detection part 10b are not displayed. Furthermore, when detecting on the VTR (not shown) side, the detection unit 10
It is determined that a is not detected and the state is recordable.

Next, use your fingernail or screwdriver to move the protrusion 11 along the arrow C.
By moving in this direction, the accidental erasure prevention member 10 can be easily slid to the state shown in FIGS. 6 and 7.

This state indicates that recording is not possible. That is,
The display/detection section 10a is not visible from the opening 12.

Furthermore, at the time of detection, the display/detection unit 10a is not detected and VT
The R (not shown) side is determined to be unrecordable.

At the same time, the display/detection section 10b of the erroneous erasure prevention member 10 is located above the display/detection hole 14 on the bottom side, and the display/detection section 10b can be viewed from the bottom of the tape cassette 1 to know that recording is impossible. The VTR (not shown) side detects the display/' detection section 10b and determines that recording is not possible.

In this way, by simply reversing the display/detection logic of the display/detection units 10a and 10b facing the back and bottom of the tape cassette 1, the tape cassette 1 can be easily configured with fewer parts.
This is a tape cassette that can display/detect whether or not accidental erasure prevention is possible at multiple locations.

Further, in the present invention, it has been determined that the back surface of the tape cassette 1 has a great display effect, and the color of the erroneous erasure prevention member 10 is set to a color other than red, but the present invention is not limited to this. For example, the accidental erasure prevention member 10 may be configured with two colors, and the display/detection unit 1 may be configured with two colors.
By setting 0a to a color other than the red color and the display/detection unit 10b to the red color, it may be possible to provide a more effective display of whether or not the tape cassette can be prevented from being erased accidentally.

Effects of the Invention As described above, the present invention allows display and detection to be performed from the rear and bottom surfaces of the cassette half using only a single moving member, and detection and display can be performed from either the bottom or rear side with a simple configuration. To provide a tape cassette which can be used as a VTR with a greater degree of freedom.

[Brief explanation of the drawing]

Fig. 1 is a plan view of a tape cassette according to an embodiment of the present invention, Fig. 2 is a rear view, Fig. 3 is a bottom view of the cassette half, and Fig. 4 is the lower cassette half in a state where information on whether or not accidental erasure prevention is possible can be recorded. 5 is a rear view of the main part of FIG. 4, FIG. 6 is a plan view of the main part of the lower cassette half in a state where recording is not possible, FIG. 7 is a rear view of FIG. 6, and FIG. FIG. 9 is a plan view of the accidental erasure prevention plate, FIG. 9 is a rear view of FIG. 8, FIG. 10 is a perspective view of a conventional example, and FIG. 11 is a perspective view of a main part of another conventional example. 1... Tape cassette 57... Lower cassette half, 10... Accidental erasure prevention member, 12...
...Display/detection opening, 14...Display/
detection hole. Name of agent Patent attorney Haruaki Koebi and 2 others -cs Tsuri he) Toma ≧ Hem) Ward Ward Q

Claims (3)

[Claims] (1) A first opening provided on the back surface of the cassette half, a second opening provided on the bottom surface of the cassette half, and the only moving member that opens and closes both the first and second openings. A tape cassette comprising: a display operation and a detection operation related to erroneous erasing are performed by movement of the moving member. (2) When the first opening is closed by the only moving member, the second opening is not closed by the moving member, or the first opening is closed by the moving member. Claim (1) characterized in that the second opening is closed by the moving member when the second opening is not present.
1) Tape cassette described. (3) The tape cassette according to any one of claims (1) and (2), wherein the moving member is constructed of a color other than red.