JP2001023340A - Recording medium housing cassette - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable the installation of an erroneous erasure preventive mechanism even in a place having a limited space within a cassette casing and to enable the sure erroneous erasure preventive operation in a recording medium housing cassette (tape cassette, for example). SOLUTION: The recording medium housing cassette is constituted to make an erroneous erasure preventive plug 17 slide in the thickness direction (vertical direction) of the cassette casing 11, thereby operating the opening or closing of an erroneous erasure prentive detection hole 18 and to make a first bend 17c1 of a click locking piece 17c engaged with a first click locking part 21a when the erroneous erasure preventive plug 17 is in a state of opening the detection hole 18 and to make a second bend 17c2 of the click locking piece 17c engaged with a second click locking part 22a when the erroneous erasure preventive plug 17 is in a state of closing the detection hole 18, thereby restraining and holding the erroneous erasure preventive plug 17.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a recording medium storage cassette provided with an erroneous erasure prevention mechanism for preventing a signal recorded on a recording medium from being erroneously erased.

[0002]

2. Description of the Related Art Conventionally, as a recording medium storage cassette provided with such an erroneous erasure prevention mechanism, for example, there is one as shown in FIG.

[0003] Shown here is a tape cassette according to the so-called 8 mm video standard. In the figure, reference numeral 1 denotes a cassette housing. This cassette housing 1 comprises a pair of upper and lower plastic halves, ie, an upper half 2 and a lower half 3. They are fixed to each other by screwing in a state of being overlapped with each other.

The cassette housing 1 contains a pair of left and right reels on which a magnetic tape is wound, that is, a supply-side reel and a take-up reel, and a part of the magnetic tape is exposed to the front of the cassette housing 1. ing. The exposed portion of the magnetic tape is configured to be openable and closable by a lid 4 attached to a front portion of the cassette housing 1 so as to be rotatable in a vertical direction.

[0005] A plug operation window 6 is provided on one side of a back label attaching surface 5 which is a back surface of the cassette housing 1.
It is configured to be opened and closed by an erroneous erasure prevention plug 7.

The plug for preventing erroneous erasure 7 has a plug operation window 6.
The erroneous erasure prevention detection hole 8 is opened in the lower surface of the lower half 3 of the cassette housing 1 in relation to the accommodation portion of the erroneous erasure prevention plug 7 in the inside of the cassette housing 1.

The erroneous erasure prevention detection hole 8 can be opened and closed by an erroneous erasure prevention plug 7, that is, the projection 7a of the erroneous erasure prevention plug 7 is hooked from the plug operation window 6 so that the erroneous erasure prevention plug 7 can be opened. Is slid in the horizontal direction (the direction of arrow a) to open and close the erroneous erasure prevention detection hole 8.

Therefore, the role for sliding the erroneous erasure prevention plug 7 and the slide position of the erroneous erasure prevention plug 7 are displayed on the plug operation window 6 provided on the back surface of the cassette housing 1 so as to indicate the position of the magnetic tape. It has a role of visually discriminating whether a signal can be recorded or not.

On the other hand, in the erroneous erasure prevention detection hole 8 opened on the lower surface of the cassette housing 1, the open / close state of the erroneous erasure prevention plug 7 is displayed to visually check whether a signal can be recorded on the magnetic tape. , And also has a role of mechanically identifying the recording enable / disable state by an erroneous erasure prevention detection mechanism provided on the cassette deck side.

In the case of identification by the erroneous erasure prevention detection mechanism, when a tape cassette is mounted on a cassette deck,
The detection pin of the erroneous erasure prevention detection mechanism provided on the cassette deck is inserted into the erroneous erasure prevention detection hole 8 from below, and whether the recording is in the recordable state or in the non-recordable state is determined based on the insertion length of the detection pin. Is done.

That is, when the erroneous erasure prevention detection hole 8 is closed by the erroneous erasure prevention plug 7, the insertion of the detection pin is prevented by the erroneous erasure prevention plug 7, so that the recording pin is identified as a recordable state. . On the other hand, when the erroneous erasure prevention detection hole 8 is open, the detection pin is inserted deep into the erroneous erasure prevention detection hole 8, thereby identifying that the recording is impossible.

[0012]

The tape cassette constructed as described above has a structure in which the erroneous erasure prevention plug 7 is slid laterally to open and close the erroneous erasure prevention detection hole 8, so that the cassette housing It is necessary to secure a sufficient space for the erroneous detection prevention plug 7 to slide in the lateral direction in the accommodation portion of the erroneous erasure prevention plug 1 in FIG.

However, as shown in FIG. 8, in a tape cassette having a structure in which a reference hole 9 for positioning the cassette (a hole for screwing) is disposed immediately beside the detection hole 8 for preventing erroneous erasure, erroneous erasure is performed. There is little storage space for prevention plugs,
Since the space for the erroneous erasure prevention plug to slide in the horizontal direction cannot be taken, it is difficult to install the erroneous erasure prevention mechanism. The present invention has been made to solve such a problem.

[0014]

In order to solve the above-mentioned problems, the present invention provides an erasure prevention plug for opening and closing an erasure prevention detection hole formed in a cassette housing, which is slidably provided in the cassette housing. In the recording medium storage cassette, the erroneous erasure prevention plug is slid in the thickness direction of the cassette housing to open and close the erroneous erasure prevention detection hole. A click locking piece having a bent portion and a second bent portion is integrally formed. On the other hand, on the cassette housing side, an erroneous erasure prevention plug is provided with a first erasure prevention opening with an erroneous erasure prevention detection hole. A first locking portion that engages with the bent portion of the second lock and locks and holds the erroneous erasure prevention plug at that position; Bends are engaged Its position erase prevention plug erroneous Te is made a structure in which a second locking portion for locking retention with.

In the recording medium storage cassette of the present invention configured as described above, the erroneous erasure prevention plug is slid in the thickness direction of the cassette housing to open and close the erroneous erasure prevention detection hole. Even in a place where the space for accommodating the plug is small, a space in which the erroneous erasure prevention plug slides can be sufficiently secured, so that an erroneous erasure prevention mechanism can be installed.

The erroneous erasure prevention plug is securely locked and held by the first bent portion of the click locking piece engaging with the first locking portion when the erroneous erasure prevention detection hole is opened. In a state where the erroneous erasure prevention detection hole is closed, the second bent portion of the click locking piece is securely locked and held by engaging with the second locking portion. An operation for preventing accidental deletion can be performed.

[0017]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 shows a tape cassette as an example of a recording medium storage cassette according to the present invention. The tape cassette shown here is a tape cassette based on the same 8 mm video standard as the above-mentioned conventional example. In the figure, reference numeral 11 denotes a cassette housing, and the cassette housing 11 is a pair of upper and lower plastic halves, namely, an upper half 12 and a lower half. The halves 13 and the halves 13 are fixed to each other by screwing in a state of being overlapped with each other.

The cassette housing 11 contains a pair of left and right reels on which a magnetic tape is wound, that is, a supply-side reel and a take-up reel, and a part of the magnetic tape is exposed to the front of the cassette housing 1. ing. The exposed portion of the magnetic tape is configured to be openable and closable by a lid 14 attached to a front portion of the cassette housing 11 so as to be rotatable in a vertical direction.

A plug operation window 16 is provided on one side of a back label attaching surface 15 which is a back surface of the cassette housing 11, and is configured to be opened and closed by an erroneous erasure prevention plug 17.

The erroneous erasure prevention plug 17 is accommodated inside the plug operation window 16 so as to be slidable in the vertical direction. The lower half 13 of the lower half 13 of the cassette housing 11 is related to the accommodating portion of the erroneous erasure prevention plug 17. Is provided with an erroneous erasure prevention detection hole 18.

The erroneous erasure prevention detection hole 18 can be opened and closed by the erroneous erasure prevention plug 17, that is, the projection 17 of the erroneous erasure prevention plug 17 is opened through the plug operation window 16.
The erroneous erasure prevention detection hole 18 is opened and closed by hooking a nail on a ₁ and sliding the erroneous erasure prevention plug 7 in the vertical direction, that is, in the thickness direction (the direction of the arrow b) of the cassette housing 11.

Therefore, a role for sliding the erroneous erasure prevention plug 17 and a sliding position of the erroneous erasure prevention plug 17 are displayed on the plug operation window 16 provided on the rear surface of the cassette housing 11 so as to display the position of the magnetic tape. It has a role of visually discriminating whether a signal can be recorded or not.

On the other hand, the erroneous erasure prevention detection hole 18 opened on the lower surface of the cassette housing 11 is provided with the erroneous erasure prevention plug 1.
By displaying the open / closed state by 7, the enable / disable state of signal recording on the magnetic tape can be visually identified, and the enable / disable state of recording can be determined by an erroneous erasure prevention detection mechanism provided on the cassette deck side. It has the role of making it mechanically identifiable.

In the case of identification by the erroneous erasure prevention detection mechanism, when the tape cassette is mounted on the cassette deck,
A detection pin of an erroneous erasure prevention detection mechanism provided on the cassette deck is inserted into the erroneous erasure prevention detection hole 18 from below,
Whether the recording state is the recordable state or the record non-recordable state is identified by the insertion length of the detection pin.

That is, when the erroneous erasure prevention detection hole 18 is closed by the erroneous erasure prevention plug 17, the insertion of the detection pin is prevented by the erroneous erasure prevention plug 17, so that the recordable state is identified. . On the other hand, when the erroneous erasure prevention detection hole 18 is opened, the detection pin is
When the recording medium is inserted to a depth of 8, it is identified as a recording impossible state.

FIGS. 2 and 3 show the shape of the erroneous erasure prevention plug 17. FIG. Erase prevention plug 17 This mis is a plastic molded article, the cover is a portion for opening and closing the operation plate portion 17a having a protruding portion 17a ₁ which is operated from the plug operating window 16 of the cassette housing 11, the erase prevention detection hole 18 mis A portion 17b and a click locking piece 17c for locking and holding the erroneous erasure prevention plug 17 in a clickable manner are integrally formed.

[0028] Click engaging piece 17c is first bent portion 17c ₁ and forms a bent shape of the S-shape and a second bent portion 17c _2, the erase prevention plug 17 mis, as will be described later to protrude to the right and left the By the function of the click locking piece 17c, the erroneous erasure prevention detection hole 18 is locked and held at two positions: an open position and a closed position.

FIG. 4 shows the plan structure of the storage portion for the erroneous erasure prevention plug in the lower half 3 of the cassette housing. In this case, a reference hole (hole for screwing) 19 for positioning the cassette is arranged immediately beside the erroneous erasure prevention detection hole 18, whereby the space for accommodating the erroneous erasure prevention plug is structurally limited. In order to cope with this, the tape cassette has a structure in which the erroneous erasure prevention plug 17 is slid up and down, that is, in the thickness direction of the cassette housing 11, to open and close the erroneous erasure prevention detection hole 18. ing.

That is, guide grooves 20a and 20b are formed in the vertical direction on the inner surface side of the lower half 3. As shown in FIG.
The operation plate portion 17a is fitted into Ob to be slidable up and down.

FIG. 6 shows a sectional structure of a housing portion of the cassette housing 11 for the erroneous erasure prevention plug. In the accommodating portion of the erroneous erasure prevention plug,
The first wall 21 and the second wall 21
And the wall portion 22 is provided so as to face each other. In this example, the first
The wall 21 is formed integrally with the lower half 13 and the second wall 22 is formed integrally with the upper half 12.

The first wall 21 and the second wall 2
2, the upper edge of the first wall 21 and the lower edge of the second wall 22 are respectively formed as a first locking portion 21a and a second locking portion 22a. And the first locking portion 2
Click locking pieces 17c are respectively provided on the first locking portion 1a and the second locking portion 22a.
First bent portion 17c ₁ and erase prevention plug 17 mis by the second bent portion 17c ₂ is engaged in the click to the two positions of the closed position and open the erase prevention detection hole 18 erroneous position It is structured to be locked and held.

That is, as shown in FIG. 6A, when the erroneous erasure prevention plug 17 is in the upper sliding position and the erroneous erasure prevention detection hole 18 is open, the click locking piece 1
First bent portion 17c ₁ of 7c engages as rides on the first engagement portion 21a, the erase prevention plug 17 mis thereby being locked held at that position.

The click engagement pieces 17c of the erase prevention plug 17 mis this time, the second bent portion 17c ₂ and the second wall portion 2
By being pressed 2 in contact and subjected to a force in the first bent portion 17c ₁ side, thereby erasing the first bent portion 17c ₁ is erroneous securely strongly engaged with the first engagement portion 21a The prevention plug 17 is securely locked and held.

On the other hand, as shown in FIG. 6B, when the erroneous erasure prevention plug 17 is at the lower slide position and the lid 17b is in the state where the erroneous erasure prevention detection hole 18 is closed, the click locking piece 17c is closed. the second bent portion 17c ₂ is engaged so caught the second engaging portion 22a, the erase prevention plug 17 mis thereby is locked held at that position.

The click engagement pieces 17c of the erase prevention plug 17 mis this time, the first bent portion 17c ₁ is first wall portion 2
By being pushed against the 1 and receives a force to the second bent portion 17c ₂ side, thereby erasing the second bent portion 17c ₂ erroneous securely strongly engaged with the second engaging portion 22a The prevention plug 17 is securely locked and held.

As described above, the erroneous erasure prevention plug 17 is securely locked and held at two positions, that is, the position where the erroneous erasure prevention detection hole 18 is opened and the position where it is closed. An erasure prevention operation can be performed.

In the above embodiment, the tape cassette is shown as an example of the recording medium storage cassette. However, the present invention is not limited to the tape cassette but can be widely applied to, for example, a disk cassette. Things.

[0039]

As described above, in the recording medium storage cassette according to the present invention, the erroneous erasure prevention detecting hole is opened and closed by sliding the erroneous erasure prevention plug in the thickness direction of the cassette housing. Even in a place where the space for accommodating the prevention plug is small, a sufficient space for sliding of the prevention plug for erroneous erasure can be secured, so that an erasure prevention mechanism can be installed.

When the erroneous erasure prevention plug has the erroneous erasure prevention detection hole opened, the first bent portion of the click locking piece engages with the first locking portion to be securely locked and held. In a state where the erroneous erasure prevention detection hole is closed, the second bent portion of the click locking piece is securely locked and held by engaging with the second locking portion. An operation for preventing accidental deletion can be performed. This makes it possible to provide a recording medium storage cassette having excellent quality.

[Brief description of the drawings]

FIG. 1 is a perspective view of a tape cassette showing an embodiment of the present invention.

FIG. 2 is a perspective view of the erroneous erasure prevention plug.

FIG. 3 is a three-view drawing of the erroneous erasure prevention plug.

FIG. 4 is a plan view showing a structure of a storage portion of the erroneous erasure prevention plug in the lower half.

FIG. 5 is a plan view showing a state in which the erroneous erasure prevention plug is assembled in a housing portion of the erroneous erasure prevention plug in the lower half.

FIG. 6 is a vertical sectional view of a housing portion of the cassette housing in which the erroneous erasure prevention plug is provided.

FIG. 7 is a perspective view showing a conventional tape cassette.

FIG. 8 is a plan view of a lower half of a structure in which a reference hole is arranged near an erroneous erasure prevention detection hole.

[Explanation of symbols]

11 mm cassette housing, 17 mm erasure prevention plug, 1
7c ‥‥ click locking piece, 17c ₁ ‥‥ first bent part,
17c ₂ {second bent portion, 18} erroneous erasure prevention detection hole, 20a, 20b {vertical guide groove, 21}
1st wall part, 21a {first locking part, 22} second wall part, 22a {second locking part

Claims (3)

[Claims] 1. A recording medium storage cassette in which an erroneous erasure prevention plug for opening and closing an erroneous erasure prevention detection hole formed in a cassette housing is slidably provided in the cassette housing. The plug is slid in the thickness direction of the housing to open and close the erroneous erasure prevention detection hole, and the erroneous erasure prevention plug has a first bending portion and a second bending portion projecting left and right. On the other hand, on the cassette housing side, the first bent portion of the click locking piece is engaged with the erroneous erasure prevention plug with the erroneous erasure prevention detection hole opened. A first locking portion that locks and holds the erroneous erasure prevention plug at that position, and a second bent portion of the click locking piece with the erroneous erasure prevention plug closing the erroneous erasure prevention detection hole. Together A recording medium storage cassette comprising a second locking portion for locking and holding the erroneous erasure prevention plug at that position. 2. The recording medium storage cassette according to claim 1, wherein opposing first and second wall portions are provided in a storage portion of the erroneous erasure prevention plug in the cassette housing, In a state where the erroneous erasure prevention plug has opened the erroneous erasure prevention detection hole, the second bent portion of the click locking piece is the second bent portion.
The first bent portion is strongly engaged with the first locking portion by contacting the wall portion of the first locking portion, and the click locking piece is closed when the erroneous erasure prevention plug closes the erroneous erasure prevention detection hole. First
A recording medium storage cassette, wherein said bent portion contacts said first wall portion so that said second bent portion is strongly engaged with said second locking portion. 3. The recording medium storage cassette according to claim 2, wherein the first wall portion and the second wall portion have respective end edges connected to the first locking portion and the second engagement portion. A recording medium storage cassette having a stop portion.