JPH087586Y2 - Tape cassette erasure prevention device - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to an erroneous erasure prevention device for a tape cassette for a one-way running multi-channel tape recorder, in which erroneous erasure prevention can be finely set. Is.

[Conventional technology]

As a one-way running tape recorder, VHS system VTR, β
It is a VTR system, an 8 mm system VTR, a DAT (digital audio tape recorder), or the like. These tape cassettes are provided with an erroneous erasure prevention claw and an erroneous erasure prevention hole as an erroneous erasure prevention device.

A conventional erroneous erasure prevention device for a tape cassette for a one-way running tape recorder is provided for each tape cassette, and sets whether the entire tape is recordable or not recordable. .

[Problems to be solved by the device]

As a one-way running type multi-channel tape recorder, there is a tape recorder used in a recording studio or the like. This type of tape recorder is often used in a mode in which a specific channel is selectively recorded in order to record a performance signal in a multi-channel (multi-track) and edit or track down.

If a tape cassette used in such a tape recorder is equipped with a conventional erasure prevention device, only the setting for enabling or disabling the recording of the entire tape can be made. Even when recording, all tracks are in a recordable state, and if the channel selection operation is mistaken, there is a risk that the signals of already recorded tracks will be erased.

The present invention aims to provide a tape cassette erroneous erasure prevention device which solves the above-mentioned drawbacks of the prior art and enables fine setting of erroneous erasure prevention.

[Means for solving the problem]

This invention is a tape cassette for a one-way running type multi-channel tape recorder, which is provided with two independent erroneous erasure prevention holes that can be opened / closed by moving an opening / closing plug, and records a channel group in which each multi-channel is divided. It is characterized in that whether to enable or disable recording is set, and the moving state of the opening / closing plug is visible from the outside of the tape cassette.

[Action]

According to the present invention, two erroneous erasure prevention holes are provided independently to determine whether the plurality of channels can be divided into two groups such as an odd channel and an even channel or an upper channel and a lower channel to enable or disable recording. Since it was set and made identifiable, in the case of selectively recording one of the channels, if the group containing that channel is set to be recordable and the other group is set to be unrecordable, it should be possible. Even if the channel selection operation is erroneous, at least the other group is not likely to be erroneously erased, and operation mistakes at the time of setting are reduced.

〔Example〕

 An embodiment of this invention will be described below.

FIG. 1 shows a state in which a tape cassette to which the present invention is applied is viewed from the upper back side. Further, FIG. 2 shows a state viewed from the lower surface rear direction. The tape cassette 10 accommodates a magnetic tape wound around a tape hub in an internal space formed by the upper shell 12 and the lower shell 14. A lid 16 that can be opened and closed is attached to the front surface of the tape cassette 10. Loading the tape cassette 10 into the multi-channel tape recorder,
The lid 16 is opened, the tape is pulled out, pressed against the multi-track fixed head, and the tape runs to record and play back.

The lower shell 14 on the lower surface of the tape cassette 10 is provided with two erroneous erasure prevention holes 18 and 20 at left and right positions near the rear surface thereof. This tape cassette is a one-way running type, and has 8 channels with a total number of channels from 1CH to 8CH. Of these, 1CH to 4CH is set to record / not record by the erasure prevention hole 18, and 5CH to 8CH. Is set to enable / disable recording with the accidental erasure prevention hole 20.

Inverted L-shaped openings 24 and 26 are formed on the left and right of the back surface 22 of the tape cassette 10, and opening / closing plugs 28 and 30 are accommodated therein so as to be slidable in the left-right direction independently.
The opening / closing plugs 28, 30 have a recess 2 for inserting a sharp portion such as the tip of a writing instrument and sliding the opening / closing plugs 28, 30.
8a and 30a are formed. The lower surface of the opening / closing plugs 28 and 30 faces the erroneous erasure prevention holes 18 and 20, and the sliding operation opens and closes the erroneous erasure prevention holes 18 and 20. That is, when the opening / closing plug 28 is slid to the right side in FIG. 1, the erroneous erasure prevention hole 18 is opened, and recording cannot be performed for channels 1 to 4. When the open / close plug 28 is slid to the left, the erroneous erasure prevention hole 18 is closed, and recording on channels 1 to 4 is possible. When the open / close plug 30 is slid to the left, the erroneous erasure prevention hole 20 is opened, and 5 to 8CH cannot be recorded. Also, slide the open / close plug 30 to the right to close the erroneous erasure prevention hole 20
Can be recorded.

The open / close plugs 28, 30 are colored in a color different from that of the shells 12, 14 so that the operating state can be easily visually recognized from the back side of the tape cassette 10.

The operation of detecting the open / closed state of the false detection preventing hole in the multi-channel tape recorder is shown in FIGS. 3 and 4.
FIG. 3 shows the case in which the recordable state is set for channels 5 to 8. At this time, the opening / closing plug 30 is slid to the right by inserting a sharp portion such as the tip of a ballpoint pen into the recess 30a, and the erroneous detection prevention hole 20 is located at the lower end of the opening / closing plug 30.
Blocked by 30b. Therefore, even if the detection rod 32 disposed inside the tape recorder is inserted into the erroneous detection prevention hole 20, the detection rod 32 comes into contact with the lower end portion 30b of the open / close plug and is not inserted deeply so that it is set in a recordable state. Is detected and recording is enabled. Further, the setting of the recordable state can be easily known by the color (for example, yellow) of the opening / closing plug 30 appearing in the entire opening 26.

FIG. 4 shows the case where the recording disabled state is set for 5CH to 8CH. At this time, the opening / closing plug 30 has the recess 30a.
A pointed portion such as the tip of a ballpoint pen is inserted into and is slid to the left, and the erroneous detection prevention hole 20 is open. Therefore, the detection rod 32 disposed inside the tape recorder is
Is detected to have been inserted into the erroneous detection prevention hole 20 and is set in the recording disabled state, and the recording is disabled.
Also, the fact that it is set to the unrecordable state means that the opening 26
This can be easily known because the color (for example, yellow) of the opening / closing plug 30 is partially shown in the inside.

[Modification]

In the above embodiment, the upper channel and the lower channel are divided, but the odd channel and the even channel may be divided.

In addition, a combination of the open / closed states of the two erroneous erasure prevention holes (open-
If four types of modes are set by using open, open-closed, closed-open, closed-closed, use of the modes other than those described above (for example, setting of recordable / unrecordable state depending on tape time zone) , Recordable / unrecordable state for each audio track and subtrack (recording control signals, etc.)
Can also be applied to.

[Effect of device]

As described above, according to the present invention, two erroneous erasure prevention holes are independently provided, and the multi-channel is divided into two channel groups such as an odd channel and an even channel or an upper channel and a lower channel. Since it is set whether to record or not to record, when selectively recording one channel, set the group that includes that channel to recordable, and record the other group unrecordable. If set to, even if the channel selection operation is made by mistake, at least the other group will not be erased by mistake. In addition, even in the setting operation and the selecting operation, the setting state of the erroneous erasure prevention piece can be visually recognized from the outside, so that mistakes can be prevented.

[Brief description of drawings]

FIG. 1 is a view showing an embodiment of the present invention, and is a perspective view of the tape cassette as seen from the upper back side. FIG. 2 is a perspective view of the tape cassette of FIG. 1 as viewed from the back side of the lower surface. 3 and 4 are partially enlarged views showing the operation of detecting the open / closed state of the false detection preventing hole in the multi-channel tape recorder when the tape cassette of FIG. 1 is used. 10 …… Tape cassette, 28,30 …… Opening / closing plug, 18,20…
… False detection prevention hole.

Claims (1)

[Scope of utility model registration request] 1. A tape cassette for a one-way running type multi-channel tape recorder, wherein two independent erasure prevention holes that can be opened / closed by moving an opening / closing plug are independently provided, and a channel group obtained by dividing the multi-channel is provided for each group. A tape cassette erroneous erasure prevention device, characterized in that whether the recording is enabled or disabled and the movement state of the opening / closing plug is visible from the outside of the tape cassette.