JPH0773645A - Tap cassette - Google Patents

Abstract

PURPOSE:To cope with a case of mounting of a forward part of a tape cassette in its inserting direction on a misinsertion preventing detecting piece at a low height of a cassette holder when the tape cassette for high density recording is inadvertently inclined upward with its front lid in the lead and is inserted under this misinserting state into a cassette holder of a VTR for standard recording. CONSTITUTION:A door 9 supported by a front wall surface part 2a21 of a loading pocket is freely openably and closably provided at an end part in the inserting direction of a misinsertion preventing vertual groove part 2a62 formed in depth measuring from a front surface 2b of a cassette case 2B constituting the high density recording tape cassette 1B to the front wall surface part 2a21 of the loading pocket. In addition, a releaf groove part 2a8 for allowing the tape cassette to be inserted under the misinserting state in entering the misinsertion preventing detecting piece provided in front of the cassette holder of the standard recording VTR into a forward part of the bottom surface of the 2nd cassette case 2B partitioned by the door 9; is formed in an approximately straight line toward the rear in the inserting direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tape cassette, and more particularly to prevention of erroneous insertion of a tape cassette into a magnetic recording and / or reproducing device.

[0002]

2. Description of the Related Art As a conventional tape cassette used in a magnetic recording and / or reproducing apparatus (hereinafter referred to as VTR) such as a video tape recorder, there is one as shown in FIGS. 5 (A) and 5 (B).

FIG. 5 is a perspective view for explaining a conventional tape cassette. FIG. 5A is a view of the tape cassette as seen from the top side, FIG. 5B is a view of the tape cassette as seen from the bottom side, and FIG. Is a diagram for explaining an erroneous insertion preventing operation when the conventional tape cassette is inserted into the VTR for standard recording from the wide direction, and (A) is inserted from the normal direction with the front lid at the top. FIG. 6B is a side sectional view showing a state in which it is normally inserted, and FIG. 7C is a side sectional view showing a state in which erroneous insertion is prevented from the back side opposite to the front lid.

The conventional tape cassette 1A shown in FIGS. 5A and 5B is formed, for example, to have a tape width of 1/2 inch, and a thick base film is coated with magnetic powder such as iron oxide. The magnetic tape (hereinafter referred to as iron oxide tape) To is housed in the cassette housing 2A, and is configured as a standard recording tape cassette capable of recording and / or reproducing in a standard recording format, for example, VHS standard format. ing.

The cassette housing 2A, which constitutes a part of the exterior of the tape cassette 1A, has an upper half member and a lower half member, which are molded from a resin material, which are vertically fitted together and joined by screws or the like. It is assembled into a substantially rectangular shape. Further, the iron oxide tape To is wound between the supply-side tape reel 3 and the winding-side tape reel 4 which are rotatably housed in the cassette housing 2A, and is wound around the supply-side tape reel 3. The iron oxide tape To passes through the supply-side guide pole 5 and the front side of the bottom surface 2a of the cassette housing 2A is lightened to open the loading pocket 2a _1.
While being stretched along 2a- ₃ , it is further wound around the winding-side tape reel 4 via the winding-side guide poles 6 and 7.

Further, reel holes 2a ₄ and 2a ₅ facing the supply-side and take-up side tape reels 3 and ₄ are formed at an intermediate portion of the bottom surface 2a of the cassette housing 2A. In addition, in the loading pockets 2a _{1 to} 2a _{3 of} the cassette housing 2A,
The iron oxide tape To is pulled out of the cassette housing 2A when a loading member (not shown) on the VTR side is inserted.

A front lid 8 for protecting the stretched iron oxide tape To is biased in the closing direction by a screw spring 9 at the front portion of the loading pockets 2a _{1 to} 2a ₃ of the cassette housing 2A. It is pivotally supported so that it can be opened and closed. The front lid 8 also constitutes a part of the exterior of the tape cassette 1A, and is formed of a resin material in an elongated shape corresponding to the wide direction (longitudinal direction) of the cassette housing 2A.

Here, the VT of the conventional tape cassette 1A
The operation of preventing erroneous insertion into R will be described with reference to FIGS.

First, as shown in FIGS. 5 (B) and 6 (A), a wide front lid 8 constituting the tape cassette 1A.
The mistaken insertion prevention means on the side of the tape cassette 1A used when the tape is normally inserted into the VTR 50 for standard recording (for VHS) adopting the standard recording format from the X ₁ direction is the front center lower part of the front lid 8. shallow a concave notch portion 8a which is notched in a recessed, and space passage of the central loading pocket 2a ₂ of the cassette housing 2A, from the loading pocket front wall portion 2a ₂₁ formed in the deeper central loading pocket 2a in ₂ recessed It is configured by an erroneous insertion prevention groove 2a ₆₁ which is formed in a shallow concave shape in the center of the front portion of the bottom surface 2a which is continuous with the front wall surface portion 2a _{21 of} the loading pocket and which is aligned with the notch portion 8a while being aligned substantially straight. At this time, the length from the front surface 2b of the cassette housing 2A to the end of the erroneous insertion prevention groove portion 2a ₆₁ on the back surface side of the front lid 8 is set to a long dimension of α ₁ mm. A lamp insertion hole 2a into which a lamp for detecting the start end and the end of the iron oxide tape To enters is inserted in the middle of the erroneous insertion prevention groove 2a _61.
7 is deeply formed, and this lamp insertion hole 2a ₇ is also a part of the erroneous insertion prevention groove 2a ₆₁ .

On the other hand, as shown in FIG. 6A, in the VTR 50 for standard recording (for VHS) which allows the tape cassette 1A to be inserted from the wide direction, the cassette holder 51 has the tape cassette 1A. Is provided so as to be reciprocally movable between an upper cassette insertion / removal position for inserting / removing the tape cassette and a cassette mounting position for moving the inserted tape cassette 1A downward, and the front lid is in the middle of moving the tape cassette 1A downward. When the lid 8 is opened, the iron oxide tape To can be pulled out from the inside of the cassette housing 2A toward the rotary drum having the magnetic head by a loading member (not shown) at the cassette mounting position below. Further, the cassette holder 51 formed by using the sheet metal member has a cassette insertion / removal opening 51a.
Is formed to have a wide width along with the cassette housing 2A, and the height direction of the cassette insertion / removal opening 51a is set to the top plate 51.
It is formed to be slightly higher than the height dimension of the cassette housing 2A so that the leaf springs 52, 52 attached to the back surface of f can contact the top surface 2f of the inserted cassette housing 2A. Also,
An eject button 53 is provided near the cassette insertion / ejection opening 51a of the cassette holder 51.

Further, the bottom plate 51b of the cassette holder 51 has an error in the central portion in the longitudinal direction of the bottom plate 51b corresponding to the erroneous insertion preventing means (8a, 2a ₆₁ ) formed in the tape cassette 1A in a shallow concave shape as described above. Insertion prevention detection member (hereinafter,
An erroneous insertion prevention detection piece 51b ₁ is formed by cutting and raising upward at a low height. Further, stopper pieces 51b ₂ and 51b ₂ are formed by cutting and raising at the tip of the cassette holder 1A in the inserting direction of the tape cassette 1A with a space left and right, and the stopper piece 51b ₂ serves as an erroneous insertion prevention detecting piece 51b ₁ . The length to the terminal end is set to a dimension β ₁ mm which is slightly shorter than the dimension α ₁ mm of the erroneous insertion prevention groove portion 2a ₆₁ described above. Therefore, the cassette holder 5
1 is viewed from the front, the installation position of the misinsertion prevention detection piece 51b ₁ is installed in the insertion direction forward of the misinsertion prevention detection piece 61b ₁ (FIG. 2) described later.

Then, as shown in FIGS. 6 (A) and 6 (B), the wide front lid 8 is placed at the top, and the cassette housing 2
The tape cassette 1A is inserted from the cassette insertion / removal opening 51a in such a posture that the bottom surface 2a of A can be placed on the bottom plate 51b of the cassette holder 51. At this time, the side surfaces 2c and 2d of the cassette housing 2A are accompanied by the insertion operation of the cassette housing 2A.
Is guided by the cassette insertion / removal opening 51a and the side surfaces 51c, 51d of the cassette holder 51 while the insertion direction is regulated to the left and right, so that the erroneous insertion prevention detection piece 51b ₁ provided in front of the cassette holder 51 is erroneous in the tape cassette 1A. The erroneous insertion prevention groove portion 2a _{61 on} the bottom surface 2a of the cassette housing 2A is passed through the concave cutout portion 8a of the front lid 8 and the space passage in the central loading pocket 2a ₂ which constitutes the insertion prevention means.
After that, since the dimension α ₁ mm> the dimension β ₁ mm is set as described above, the erroneous insertion prevention detection piece 5 is inserted.
The tape cassette 1A is inserted to a predetermined position just before the 1b ₁ comes into contact with the end of the erroneous insertion prevention groove portion 2a ₆₁ and the front surface 2b of the cassette housing 2A comes into contact with the stopper piece 51b ₂ to be inserted into the predetermined position. It can be determined that the insertion was successful.

Further, as shown in FIG. 6 (C), unlike the normal insertion direction from the wide width direction with the front lid 8 at the head as described above, the cassette housing is on the side opposite to the front lid 8. Body 2A
The back side 2e having a wide width is the top, and the cassette housing 2
When the bottom surface 2a of A is erroneously inserted in a posture substantially parallel to the bottom plate 51b of the cassette holder 51, the front portion of the back surface 2e of the cassette housing 2A is located at the front of the cassette holder 51 and has a low height. the insertion preventing detecting piece 51b ₁ will abut the tape cassette 1A can be judged rearward to the mis-insertion of being protruded greatly unable inserted into a predetermined position in the cassette holder 51. Incidentally, erroneous insertion of the tape cassette 1A from a wide width direction may be turned upside down in addition to the case shown in FIG. 6C, but the description is omitted here.

[0014]

By the way, recently, a VTR for high-density recording capable of recording and / or reproducing an HDTV image such as a high-definition image or an image of a landscape screen TV at a high density is desired. In order to realize this, a high-density recording format different from the conventional standard recording format will be provided on January 8, 1993, for example, WV.
The HS standard format has been proposed. For high-density recording that can support this W-VHS standard format (W-VH
For S) tape cassettes, the conventional standard recording (VHS) tape cassette 1A is configured for reasons such as the outer shape of the cassette housing sharing production equipment, cost reduction, and upward compatibility with VTRs. The external dimensions are set to be substantially the same as those of the cassette housing 2A.
A magnetic tape (hereinafter, referred to as a metal tape) which is formed to have a thickness of ½ inch and which has a thin base film coated or vapor-deposited with a magnetic material such as chromium is housed. When a tape cassette for high-density recording (for W-VHS) is inserted into a newly developed VTR for standard recording and high-density recording (for both VHS and W-VHS) with upward compatibility, W-VHS Two-track recording and / or reproduction in a standard format can be performed at high density.
Upward compatibility is the newly developed high-density recording (W
-This is not applicable to the standard recording (VHS) VTR50 in which the VHS tape cassette has already been used, because it is different from the standard recording (VHS).
Tape cassette 1A for high-speed recording and high-density recording (W-VH
The S) tape cassette is a system that can be applied to newly developed VTRs for both standard recording and high-density recording (for both VHS and W-VHS).

Therefore, erroneous insertion preventing means (8a, 2) provided on the tape cassette for high density recording (for W-VHS) and the tape cassette for standard recording (for VHS) 1A.
There is a _demand for an erroneous insertion preventing means based on the same technical idea as that of a ₆₁ ). That is, the tape cassette for high density recording (for W-VHS) is provided with an erroneous insertion preventing means capable of preventing the insertion of the tape cassette for standard recording (for VHS) into the VTR 50, and for high density recording (for W-VHS). Newly developed high-density tape cassette with high compatibility with up-to-date compatibility standard recording and high density recording (VHS, W-VHS) VTR A tape cassette for recording (for W-VHS) is desired.
At this time, for newly developed high density recording (for W-VHS)
Tape cassette for standard recording (V
When the cassette holder 51 is inserted into the (for HS) VTR 50 in the wrong insertion state, as described above, the height direction of the cassette holder 51 of the VTR 50 is formed higher than the height dimension of the cassette housing 2A. Since a gap is formed between the back surface of the plate 51f and the top surface 2f of the cassette housing 2A, especially for a user such as a child for high density recording (WV
There is a case where the front part of the front cassette side of the HS tape cassette is carelessly inserted obliquely upward, and in this case, the front part of the cassette housing is a VT for standard recording (for VHS).
There is a possibility that the wrong insertion prevention detection piece 51b, which is provided at the front of the cassette holder 51 of the R50 and has a low height, may run over, so it is necessary to take measures beforehand.

[0016]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and a first magnetic tape for recording / reproducing in a first recording format is wound between a pair of reels to form a substantially rectangular shape. Of the first cassette housing, which can be opened and closed so as to cover the first magnetic tape which is housed in the first cassette housing and stretched by a loading pocket formed in a front portion of the first cassette housing. Support, and
An erroneous insertion prevention groove formed in the front part of the bottom surface connected to the front wall surface of the loading pocket formed in the back of the loading pocket with the front lid at the front is provided in front of the cassette holder of the first magnetic recording and / or reproducing apparatus. It has substantially the same structure as the tape cassette for the first recording format that is normally inserted into the low height erroneous insertion prevention detection member,
A second magnetic tape to be recorded / reproduced in a second recording format is housed in a second cassette housing having substantially the same outer dimensions as the first cassette housing, and the front lid is placed at the top of the first cassette housing. The mis-insertion prevention groove is formed so as to be visually shorter than the mis-insertion prevention groove and has a size substantially equal to the depth dimension from the front surface of the second cassette housing to the front wall surface of the loading pocket. A tape cassette for a second recording format that is normally inserted into a low-height erroneous insertion prevention detection member provided at the back of a cassette holder of a reproducing apparatus, wherein the second cassette housing is formed with the front lid at the top. Corresponding to the case where the cassette is inserted in the cassette holder of the first device, the front wall surface of the loading pocket is provided at the insertion-direction end portion of the incorrect insertion prevention groove of the second cassette housing. A door supported on the door is provided so as to be openable and closable, and an erroneous insertion prevention detection member on the side of the first device moves into the door after riding on the door from the end portion in the insertion direction of the erroneous insertion prevention groove portion in accordance with the insertion operation and is erroneously inserted. An escape groove for allowing the insertion of the second cassette is formed in a substantially straight line toward the rear in the insertion direction at the front part of the bottom surface of the second cassette housing that separates the door. When the housing is inserted into the cassette holder of the first device and the cassette holder of the second device, the door is kept in the closed state, and the escape groove portion of the second cassette housing has an error on the first device side. When the insertion prevention detection member gets in,
The present invention provides a tape cassette characterized in that the door is configured to be opened in order to facilitate removal of the erroneous insertion prevention detection member in accordance with an eject operation.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the tape cassette according to the present invention will be described in detail below with reference to FIGS.

1A and 1B are views for explaining a tape cassette according to the present invention. FIG. 1A is a perspective view of the tape cassette as seen from the bottom side, and FIG. 1B is an insertion of the tape cassette from a wide width direction. Corresponding to erroneous insertion prevention means, a cross-sectional view of the escape groove portion at the time of erroneous insertion. Fig. 2 shows the erroneous insertion prevention operation when the tape cassette is inserted into the VTR for both standard recording and high density recording from the wide width direction. It is a diagram for explaining,
(A) is a perspective view showing a state in which the front lid is normally inserted, (B) is a side sectional view showing a state in which the front lid is normally inserted, and (C) is a rear view from the side opposite to the front lid. FIG. 3D is a side sectional view showing a state in which the wrong insertion is prevented, and FIG. 3D is a side sectional view showing a state in which the wrong insertion preventing member is inserted into the escape groove portion of the cassette housing at the time of wrong insertion from the back surface. It is a figure for demonstrating the state when a cassette is erroneously inserted in the VTR for standard recording with the front lid at the front, (A) is a perspective view showing the erroneous insertion, and (B) is an erroneous insertion. A side cross-sectional view showing a blocked state, (C) shows a state in which the incorrect insertion preventing member has entered the escape groove portion after crossing over the door provided on the front wall surface of the loading pocket of the cassette housing when the incorrect insertion is made. Sectional view, Figure 4 shows the tape cassette as a VTR for standard recording with the front lid at the top. It is a top view for explaining the state at the time of insertion, (A) is the figure which showed the state which prevented erroneous insertion, (B) was provided in the front wall surface part of the loading pocket of a cassette housing at the time of erroneous insertion. Figure showing a state in which the incorrect insertion prevention member has passed the door and entered the escape groove,
FIG. 6C is a diagram showing a state in which the erroneous insertion prevention member opens the door provided on the front wall surface of the loading pocket of the cassette housing along with the eject operation.

The tape cassette 1B according to the present invention shown in FIGS. 1A and 1B is an iron oxide tape (recording / reproducing) in the standard recording format (first recording format) described in the prior art. For a standard recording (first recording format) tape cassette 1A in which a first magnetic tape) To is housed in a cassette housing (first cassette housing) 2A, a cassette housing (first cassette housing) In a cassette housing (second cassette housing) 2B formed to have substantially the same outer dimensions as 2A, magnetic recording characteristics are different from those of the iron oxide tape To, and recording / reproduction is performed in a high density recording format (second recording format). A 1/2 inch wide metal tape (second magnetic tape) Tm is housed to constitute a tape cassette for high density recording (second recording format). As a result, the tape cassette 1B according to the present invention becomes a high density recording format, for example, W-VH.
VTR60 that uses the S standard format and is used for both standard recording and high-density recording (for both VHS and W-VHS) (Fig. 2
(A)).

Further, the tape cassette 1B according to the present invention
As described later, the mistaken insertion prevention groove portion (hereinafter, referred to as an incorrect insertion prevention virtual groove portion) 2a formed by the space passage of the loading pocket 2a ₂ at the center of the cassette housing 2B is described below.
The VTR 50 for standard recording (for VHS) of the tape cassette 1B is formed with the front lid 8 at the top, by forming ₆₂ shorter than the erroneous insertion prevention groove 2a ₆₁ provided on the bottom surface 2a side of the conventional cassette housing 2A. In addition to preventing erroneous insertion into the standard lid, the front lid 8 is used as the head for standard recording and high-density recording (V
The insertion into the VTR 60 for both HS and W-VHS is allowed, and erroneous insertion into the VTR 60 for both standard recording and high-density recording (for both VHS and W-VHS) with the back surface 2e at the top is prevented. Has become.

Further, in correspondence with the case where the front portion of the tape cassette 1B in the insertion direction is inadvertently inclined obliquely upward with the front lid 8 as the leading end and is mistakenly inserted into the VTR 50 for standard recording (for VHS), the cassette housing is provided. A door 9 supported by a front wall 2a ₂₁ of the loading pocket is provided at the end of the insertion direction of the erroneous insertion prevention virtual groove 2a ₆₂ formed in the body 2B so as to be openable and closable, and a front part of the bottom surface of the cassette housing 2B separated by the door 9 is provided. The erroneous insertion prevention detection member 51b ₁ on the VTR 50 side for standard recording (for VHS) is inserted into the groove, and the escape groove portion 2a ₈ which allows the insertion in the erroneous insertion state is formed in a substantially straight line rearward in the insertion direction. . Therefore, the tape cassette 1B
Is allowed for insertion in the newly developed VTR 60 that is compatible with standard recording and high-density recording (VHS, W-VHS combined) that have been newly developed, but for conventional standard recording with a different recording format. VTR50 (for VHS)
In this case, the normal erroneous insertion is prevented by the erroneous insertion preventing means described later.

First, FIGS. 1A, 1B and 2A.
As shown in FIG. 5, it is used when the tape is normally inserted into the VTR 60 for both standard recording and high-density recording (for both VHS and W-VHS) from the X ₁ direction with the wide front lid 8 forming the tape cassette 1B at the head. The erroneous insertion preventing means on the side of the tape cassette 1B corresponding to the erroneous insertion preventing means (8a, 2a ₆₁ ) on the side of the tape cassette 1A shown in the conventional example is provided at the central portion of the cassette housing 2B in the wide direction. is set up.
That is, the erroneous insertion preventing means on the side of the tape cassette 1B has a concave cutout portion 8a formed by cutting out a lower central portion of the front surface of the front lid 8 in a concave shape.
And a virtual groove portion 2a ₆₂ (imaginary space) from the front surface 2b of the cassette housing 2B to the loading pocket front wall surface portion 2a ₂₁ formed in the central loading pocket 2a ₂ on the back side of the front lid 8 for preventing incorrect insertion. 5) and the length of the erroneous insertion prevention virtual groove portion 2a ₆₂ composed of this space passage is set to a dimension α ₂ mm, and the length is set to the value shown in FIG.
The dimension is set to α ₂ mm which is shorter than the length dimension α ₁ mm to the end of the conventional misinsertion prevention groove portion 2a ₆₁ shown in FIG. Therefore, the cassette housing 2
The erroneous insertion preventing means B is constituted by the concave cutout portion 8a of the front lid 8 and the erroneous insertion prevention virtual groove portion 2a ₆₂ formed of a space passage in the central loading pocket 2a ₂ as if they were substantially in a straight line. , insertion prevention virtual groove 2 mis consisting central space passage of the loading pockets 2a ₂ of
Although the a ₆₂ is not formed in the groove shape, the VTR for standard recording (for VHS) is provided in the erroneous insertion prevention virtual groove portion 2a _62.
Wrong insertion prevention detection piece 51b ₁ provided in front of the cassette holder 51 of 50 or the wrong insertion prevention provided at the back of the cassette holder 61 of the VTR 60 for both standard recording and high-density recording (for both VHS and W-VHS) described later. The detection piece 61b ₁ can enter in a substantially straight line. At this time, since the cassette housing 2B is restricted in the insertion direction left and right with respect to the cassette holders 51 and 61, the erroneous insertion prevention virtual groove portion 2a _{62 formed of} a space passage does not cause any trouble.

Further, closed in the center of the loading pocket front wall portion 2a ₂₁ of the cassette housing 2B, the door 9 formed in a rigid body with a slight thickness around the shaft 10 by a torsion spring (not shown) It is biased in the direction and can be opened and closed freely. This door 9 constitutes an essential part of the present invention, and the door 9 can be opened toward the front of the cassette housing 2B, and the door 9 is provided at the back of the cassette housing 2B. It is regulated that the lid cannot be opened. Further, when the door 9 is closed, the front of the door 9 is substantially flush with the front wall surface 2a ₂₁ of the loading pocket, and
The front of the door 9 serves as the end portion in the insertion direction of the erroneous insertion prevention virtual groove portion 2a ₆₂ . In addition, the bottom surface 2 connected to the front wall surface portion 2a ₂₁ of the loading pocket in the center of the cassette housing 2B.
The front part of a, relief grooves 2a ₈ of erroneous insertion when the main part of the present invention is formed. Relief groove 2a ₈ when the erroneous insertion is formed in a shallow concave substantially straight line in front portion of the bottom surface 2a of spaced a slight distance from the insertion direction end portion of the erroneous insertion preventing virtual groove 2a ₆₂ as the thickness of the door 9 ing. Further, since the height of the door 9 is formed larger than the height of the relief groove 2a _8, insertion of the insertion preventing virtual groove 2a ₆₂ erroneously in a state where the door 9 is closed direction end portion and the relief groove 2a ₈
The insertion end portion of the door is closed by the door 9, while the door 9
In the state where the lid is opened, the erroneous insertion prevention virtual groove portion 2a ₆₂ and the escape groove portion 2a ₈ communicate with each other in a substantially straight line.
Moreover, the relief groove 2a ₈ is formed in a substantially straight line including the lamp inserting hole 2a ₇ lamp enters for detecting start and end of the metal tape Tm. Further, the length dimension of the escape groove portion 2a _{8 is} the same as the front surface 2 of the cassette housing 2B.
The distance from b to the end of the escape groove portion 2a ₈ is set to a dimension α ₁ mm or more. Therefore, the bottom surface 2a of the cassette housing 2B
The relief groove portion 2a ₈ formed on the side is for standard recording (VHS) in which the recording format is different by inadvertently inclining the front portion in the insertion direction of the tape cassette 1B obliquely upward with the wide front lid 8 at the head as described later. Erroneous insertion prevention virtual groove portion 2 of the cassette housing 2B when it is erroneously inserted into the VTR 50
The front of the door 9 which is the end portion of the a ₆₂ is the cassette holder 5.
Low height erroneous insertion prevention detection piece 51b ₁ provided in front of ₁
It enters erroneous insertion preventing detection member 51b ₁ after rides on, and is formed so as to be able to tolerate erroneous insertion into VTR50 the tape cassette 1B.

Further, as will be described later, a door 9 provided on the front wall surface portion 2a ₂₁ of the loading pocket of the cassette housing 2B.
, When inserting the front lid 8 of the tape cassette 1B in the top cassette holder 51 is kept in the closed state by the torsion spring (not shown), a stopper function for preventing erroneous insertion detecting piece 51b ₁ of the cassette holder 51 Plays. On the other hand, the tape cassette 1B is mistakenly inserted into the cassette holder 51 with the front lid 8 at the top, and the cassette holder 5
When the misinsertion prevention detection piece 51b ₁ having a low height of 1 passes over the door 9 and enters the escape groove 2a ₈ , the door 9 resists a torsion spring in accordance with the ejecting operation and the center of the cassette housing 2B. The lid is opened toward the front of the loading pocket 2a _{2 so} that the erroneous insertion prevention detection piece 51b ₁ can be easily removed from the escape groove 2a ₈ . still,
Even if the door 9 opens toward the front of the cassette housing 2B,
Loading pockets 2a _{1 to} 2a of the cassette housing 2B
The length of the door 9 is set in advance so that the door 9 does not come into contact with the metal tape Tm stretched in front of ₃ .

Furthermore, in response to erroneous insertion of the wide rear direction of width of the tape cassette 1B, the groove 2a ₉ run away in the width direction central portion in the insertion direction in front of the back surface 2e and continuous bottom surface 2a of the cassette housing 2B is It is formed in a shallow concave shape in a substantially straight line. The escape groove portion 2a ₉ is set at a position on an extension line of the escape groove portion 2a ₈ formed on the front side of the bottom surface of the cassette housing 2B, and in the insertion direction forward when the cassette housing 2B is erroneously inserted from the wide back side direction. It is formed rearward in the insertion direction with a slight distance from the rear surface 2e serving as a part.
At this time, the length dimension of the relief groove 2a ₉ until the end of the groove portion 2a ₉ escape from the back surface 2e is set to more dimensions alpha ₁ mm. In addition, as shown in FIG. 1 (B), the escape groove portion 2a
_{In the} front of the rear surface 2e in the insertion direction of the cassette holder 5, the cassette holder 5 that has entered the escape groove portion 2a ₉ as described later.
An inclined surface K is formed so that the erroneous insertion prevention detection pieces 51b ₁ and 61b ₁ of ₁ , 61 can be easily separated during ejection.

Next, as shown in FIG. 2A, in the VTR 60 for both standard recording and high-density recording (for both VHS and W-VHS) which allows the tape cassette 1B to be inserted from a wide width direction. The cassette insertion / removal opening 61a of the cassette holder 61 is formed wide together with the cassette housing 2B, and the height direction of the cassette insertion / removal opening 61a is the top plate 6.
It is formed slightly higher than the height of the cassette housing 2B so that the leaf springs 62, 62 attached to the back surface of the 1f can contact the top surface 2f of the inserted cassette housing 2B. An eject button 63 is provided near the cassette insertion / removal opening 61a of the cassette holder 61. In addition, the bottom plate 61b of the cassette holder 61 has the erroneous insertion preventing means (8a, 2a ₆₂ ) formed in the tape cassette 1B as described above.
Correspondingly, an erroneous insertion prevention detection member (hereinafter referred to as an erroneous insertion prevention detection piece) 61b ₁ is formed by cutting and raising upward at a low height in the central portion of the bottom plate 61b in the width direction. In addition, stopper pieces 61b ₂ and 61b ₂ are formed by cutting and raising the cassette holder 61 at the front end in the insertion direction of the tape cassette 1B with a space left and right. In this case, the installation position of the width direction of the erroneous insertion preventing detection member 61b ₁ of the cassette holder 61 is conventional erroneous insertion preventing detection member shown in FIG. 6 (A) 5
It is set at the same position corresponding to the installation position of 1b _{1 in} the width direction. In addition, the stopper piece 61 of the cassette holder 61
The length from b ₂ to the end of the misinsertion prevention detection piece 61b ₁ is a length dimension β ₁ m from the conventional stopper piece 51b ₂ shown in FIG. 6A to the end of the misinsertion prevention detection piece 51b _1.
The dimension β ₂ mm is set to a dimension shorter than that of m to be visually confirmed, and the dimension β ₂ mm is a dimension β ₂ m slightly shorter than the dimension α ₂ mm of the erroneous insertion prevention virtual groove portion 2a ₆₂ described above.
It is set to m. Therefore, when the cassette holder 61 is viewed from the front, the installation position of the erroneous insertion prevention detection piece 61b ₁ can be visually confirmed more than the installation position of the conventional erroneous insertion prevention detection piece 51b ₁ with respect to the insertion direction of the tape cassette 1B. It is installed in the back.

Here, the tape cassette 1 for high density recording
B is also used for high-density recording with the same recording format (VH
The erroneous insertion preventing operation when the S / W-VHS is used for the VTR 60 will be described with reference to FIGS.

As shown in FIGS. 2 (A) and 2 (B), the wide front lid 8 of the tape cassette 1B is located at the beginning, and the bottom surface 2a of the cassette housing 2B is used for both standard recording and high density recording (VHS). , W-VHS (also used for W-VHS), the tape cassette 1B is inserted from the cassette insertion / ejection opening 61a in such a posture that it can be placed on the bottom plate 61b of the cassette holder 61. At this time, along with the inserting operation of the cassette housing 2B, a concave notch portion 8a of the front lid 8 to erroneous insertion preventing detection member 61b ₁ provided on the deeper of the cassette holder 61 constitutes the insertion preventing means erroneous tape cassette 1B After passing through, it is inserted into the erroneous insertion prevention virtual groove portion 2a _{62 formed by} the space passage in the central loading pocket 2a, and thereafter, as described above, the dimension α ₂ mm> dimension β ₂ mm is set. The insertion prevention detection piece 61b ₁ is a false insertion prevention virtual groove portion 2a _62.
Of the stopper piece 6 at a predetermined position on the front side of the door 9 which is the end portion in the insertion direction of the cassette housing and the front surface 2b of the cassette housing 2B.
Since the inserted 1b ₂ to a predetermined abutting position it can be determined that the tape cassette 1B is inserted correctly. Also,
The front during insertion or withdrawal of the lid 8 into the cassette holder 61 of the tape cassette 1B in the top kept closed state by the torsion spring door 9 provided in the loading pocket front wall portion 2a ₂₁ of the cassette housing 2B is not shown ing.
Therefore, when the tape cassette 1B is properly inserted into the cassette holder 61, the erroneous insertion prevention detection piece 61b ₁ of the cassette holder 61 reaches only a position just before the front of the door 9, so that the insertion prevention detection piece 61b ₁ is inserted into the door 9a. It does not enter into the escape groove portion 2a ₈ formed in the front portion of the bottom surface 2a with the space therebetween.

Further, as shown in FIG. 2C, unlike the normal insertion direction from the wide width direction with the front lid 8 at the head as described above, the cassette housing is provided on the side opposite to the front lid 8. Body 2B
The back side 2e having a wide width is the top, and the cassette housing 2
When the bottom surface 2a of B is erroneously inserted in a substantially parallel posture along the bottom plate 61b of the cassette holder 61, the front portion of the rear surface 2e of the cassette housing 2B is erroneous due to a low height provided at the back of the cassette holder 61. the insertion preventing detecting piece 61b ₁ will abut the tape cassette 1B can be judged rearward to the mis-insertion of being protruded greatly unable inserted into a predetermined position in the cassette holder 61.

Further, as shown in FIG.
When the tape cassette 1B is erroneously inserted into the cassette holder 61 from the same direction as (C), the height of the cassette holder 61 is slightly higher than the height dimension of the cassette housing 2B as described above. There is a slight gap between the top surface 2f of the body 2B and the back surface of the top plate 61f of the cassette holder 61. In this state, especially when a user such as a child sets the wide rear surface 2e of the tape cassette 1B at the front and inadvertently inclines the rear surface 2e, which is a front portion in the insertion direction of the tape cassette 1B, to the cassette holder 61. When erroneous insertion is within, but ride on erroneous insertion preventing detection member 61b ₁ of the front portion of the back surface 2e of the cassette housing 2B is low height, this remains the user will push the further deeper the tape cassette 1B unnoticed The erroneous insertion prevention detection piece 61b ₁ enters into the escape groove portion 2a ₉ formed at a slight distance from the front portion of the back surface 2e. Here, since the length of the escape groove portion 2a ₉ is formed to be the dimension α ₁ mm or more as described above, the misinsertion preventing detection piece 61b ₁ remains in the escape groove portion 2a ₉ and the back surface 2
e is inserted until it abuts against the stopper 61b _2, the tape cassette 1B is mounted on the cassette holder 61 while allowed erroneous insertion state. After this, before the cassette holder 61 reaches the lower cassette mounting position, the rear surface 2e
If the user inserts the tape cassette 1B into the cassette by pressing the eject button 63 immediately after the user immediately notices that the front cover 8 cannot be opened due to an incorrect insertion from The holder 61 can be taken out. At this time, back in erroneous insertion preventing detection member 61b ₁ is intruded escaping groove 2a within ₉ 2e
Since the inclined surface K is formed in the front in the insertion direction from the side, when the user pulls out the tape cassette 1B,
The erroneous insertion prevention detection piece 61b ₁ can be easily separated from the escape groove portion 2a ₉ along the inclined surface K. Therefore, the tape cassette 1B is forcibly pushed in the VTR 60 for standard recording and high-density recording (for VHS, W-VHS) by mistakenly inclining the front portion in the insertion direction from the wide back surface 2e obliquely upward. However, the tape cassette 1B can be reliably taken out from the cassette holder 61, and can be taken out without damaging the tape cassette 1B and the VTR 60.

Next, a tape cassette 1B for high density recording
3 and FIG. 4 for the operation when the card is erroneously inserted into the VTR 50 for standard recording (for VHS) with a different recording format
Will be explained.

As shown in FIGS. 3 (A), 3 (B) and 4 (A), the tape cassette 1 is provided with the wide front lid 8 at the top.
B is for standard recording with different recording format (for VHS)
When it is inserted into the cassette holder 51 of the VTR 50 by mistake, a slight gap is formed between the back surface of the top plate 51f of the cassette holder 51 and the top surface 2f of the cassette housing 2B. Upon insertion in a substantially parallel orientation to the bottom surface 2a of 2B along the bottom plate 51b of the cassette holder 51, before the erroneous insertion preventing detection member 51b ₁ provided on the front of the cassette holder 51 constitutes an insertion preventing means erroneous tape cassette 1B The lid 8 is inserted into an erroneous insertion prevention virtual groove portion 2a _{62 formed} of a concave cutout portion 8a and a space passage in the central loading pocket 2a.
_For the length dimension α ₂ mm of ₆₂ , the stopper piece 51b ₂
To the end of erroneous insertion prevention detection piece 51b _{1
Since the} length of ₁ mm is longer, the incorrect insertion prevention detection piece 51b ₁ of a low height comes into contact with the front of the door 9 which is the insertion-direction end portion of the incorrect insertion prevention virtual groove portion 2a ₆₂ , and prevents further insertion. By doing so, it is possible to determine that the tape cassette 1B cannot be inserted to the predetermined position and that it has been erroneously inserted.

Further, in the state shown in FIGS. 3 (C) and 4 (B), which is an essential part of the present invention, the same direction as shown in FIGS. 3 (A), (B) and 4 (A) is obtained. From tape cassette 1
When B is erroneously inserted into the cassette holder 51, a slight gap is formed between the back surface of the top plate 51f of the cassette holder 51 and the top surface 2f of the cassette housing 2B as described above, so that especially children and the like If the user accidentally inserts the front portion 8 of the cassette housing 2B into the cassette holder 51 by inclining the front portion in the insertion direction of the cassette housing 2B obliquely upward with the wide front lid 8 at the front, the space passage in the loading pocket 2a at the center is inserted. Since the door 9 is closed by a screw spring (not shown) at the end portion in the insertion direction of the virtual groove portion 2a ₆₂ , the detection of the false insertion prevention of low height provided on the front side of the cassette holder 51 is detected. Although pieces 51b ₁ rides, this remains the user will push the further deeper the tape cassette 1B without noticing, erroneous insertion preventing detection member 51b ₁ is at a door 9 cassette Including lamp insertion hole 2a ₇ formed on the bottom front portion of the housing 2B enters the relief groove 2a in _8. Here, since the length of the escape groove portion 2a ₈ is formed to have the dimension α ₁ mm or more as described above, the erroneous insertion prevention detection piece 51b ₁ remains in the escape groove portion 2a ₈ and the cassette housing is maintained. front surface 2b of the body 2B is inserted until it abuts against the stopper 51b ₂ of the cassette holder 51, the tape cassette 1B is placed on the left cassette holder 51 inserted state was allowed erroneously. After that, the tape cassette 1B reaches the cassette mounting position while the front lid 8 is opened with the downward movement of the cassette holder 51, and the metal tape Tm is pulled out from the cassette housing 2B to rotate with the magnetic head. When it is attached to a drum (not shown), recording on the metal tape Tm cannot be performed due to the technical idea according to Japanese Utility Model Publication No. 5-14391, but only the content already recorded on the metal tape Tm is reproduced. However, since the recording format and the magnetic recording characteristics are different, good image quality cannot be obtained, and the user can immediately remove the tape cassette 1B from the cassette holder 51 by pressing the eject button 53 or the like.

[0034] Here, as shown in FIG. 4 (C), when the eject the tape cassette 1B from the cassette holder 51, when pulled out of the tape cassette 1B in front with the ejecting operation, enters the relief groove 2a in the ₈ Since the misinsertion preventing detection piece 51b ₁ pushes the door 9 against the torsion spring (not shown), the door 9 opens the front of the cassette housing 2B around the shaft 10 (in the direction of the arrow). ,
The erroneous insertion prevention detection piece 51b ₁ can be easily separated from the escape groove 2a ₈ . Therefore, even if the front portion of the tape cassette 1B is inadvertently tilted upward with the front lid 8 in the insertion direction, and the tape cassette 1B is forcibly pushed into the VTR 50 for standard recording (for VHS) in the wrong insertion state, the tape cassette 1B will be ejected. It can be taken out from the holder 51 without fail, and can be taken out without damaging the tape cassette 1B and the VTR 50. Of course, when the erroneous insertion prevention detection piece 51b ₁ is completely removed from the escape groove portion 2a ₈ , the door 9 is closed again by a screw spring (not shown).

[0035]

According to the tape cassette of the present invention described in detail above, the first magnetic tape (iron oxide tape) which is recorded and reproduced in the first recording format (standard recording format) is housed in the first cassette housing. The tape cassette for the first recording format, which has substantially the same structure,
A tape cassette for the second recording format in which a second magnetic tape (metal tape) for recording / reproducing in a recording format (high density recording format) is housed in a second cassette housing having substantially the same external dimensions as the first cassette housing. In order to prevent erroneous insertion of the tape cassette for the second recording format into the first magnetic recording and / or reproducing device for recording / reproducing in the first recording format, with the front lid at the top, The mis-insertion prevention groove, which is formed to be approximately the same size as the depth from the front surface of the housing to the front wall surface of the loading pocket, is shorter than the mis-insertion prevention groove formed in the front part of the bottom surface of the first cassette housing so that it can be visually confirmed. In addition, a door supported on the front wall surface of the loading pocket is provided at the end portion of the insertion direction of the erroneous insertion prevention groove portion of the second cassette housing so as to be openable and closable. In addition, the erroneous insertion prevention detection member of the first device enters the front part of the bottom surface of the second cassette housing that separates the door, and the escape groove portion that allows the insertion in the erroneous insertion state is substantially straight toward the rear in the insertion direction. In particular, when a user such as a child inadvertently tilts the front portion in the insertion direction of the tape cassette obliquely upward with the front lid at the beginning, the tape cassette is inserted in the cassette holder on the first device side in an erroneous insertion state. After the low-height mis-insertion prevention detection member provided in front of the cassette holder of the first device enters the mis-insertion prevention groove of the second cassette housing, and after the door that becomes the insertion direction end portion of the mis-insertion prevention groove is run up Even if the erroneous insertion prevention detection member enters the clearance groove formed in the front portion of the second cassette housing with the door separated, the tape cassette for the second recording format is pulled to the front along with the eject operation. Out the so door by insertion preventing detection member erroneous entering into relief the groove is opened cover can be easily detached from the groove flank of the erroneous insertion preventing detection member. Therefore, with the front lid at the top, the front portion in the insertion direction of the tape cassette for the second recording format is inadvertently tilted upwards and is erroneously inserted into the cassette holder of the first device for recording / reproducing in the first recording format. The tape cassette for the second recording format can be reliably taken out from the cassette holder of the first device even if it is forcibly pushed in, and any damage is given to the tape cassette for the second recording format and the first device. Can be taken out without.

[Brief description of drawings]

FIG. 1 is a diagram for explaining a tape cassette according to the present invention.

FIG. 2 is a diagram for explaining an erroneous insertion prevention operation when the tape cassette according to the present invention is inserted into a VTR for both standard recording and high density recording from a wide direction.

FIG. 3 is a diagram for explaining a state when the tape cassette according to the present invention is erroneously inserted into a VTR for standard recording with the front lid as a head.

FIG. 4 is a plan view for explaining a state in which the tape cassette according to the present invention is erroneously inserted into the VTR for standard recording with the front lid as a head.

FIG. 5 is a perspective view for explaining a conventional tape cassette.

FIG. 6 is a diagram for explaining an erroneous insertion prevention operation when a conventional tape cassette is inserted into a VTR for standard recording from a wide width direction.

[Explanation of Codes] 1A ... Tape cassette for first recording format (tape cassette), 1B ... Tape cassette for second recording format (tape cassette), 2A ... First cassette housing (cassette housing), 2B ... the second cassette housing (cassette housing), 2a ... bottom, _2a 1 ~2a 3 _... loading pocket,
2b ... front surface, 2a ₂₁ ... front wall surface portion of loading pocket, 2a ₆₁ ... mis-insertion preventing groove portion when inserting from the width direction of the first cassette housing, 2a ₆₂ ... from width direction of the second cassette housing Insertion prevention groove portion (erroneous insertion prevention virtual groove portion) at the time of insertion of 2a, ₈ ... escape groove portion, 3 ... supply tape reel, 4 ... winding tape reel, 8 ... front lid, 9 ... door, 50 ... first First device (VTR) when inserting from the wide width direction of the cassette housing, 51 ... Cassette holder when inserting from the wide width direction of the first cassette housing, 51b ₁ ... Width of the first cassette housing Insertion detection detecting member (erroneous insertion prevention detection piece) corresponding to the wide direction of the second cassette housing, 60 ... Second device (VTR) when the second cassette housing is inserted from the wide direction, 61 ... Second cassette housing Cassette when inserting from a wide width Folder, 61b 1 _... erroneous insertion preventing detection member (erroneous insertion preventing detection member) and the corresponding broad direction of width of the second cassette housing, the To ... first magnetic tape (iron oxide tape), Tm ... second magnetic tape ( Metal tape).

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[Procedure amendment]

[Submission date] August 8, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0007

[Correction method] Change

[Correction content]

A front cover 8 for protecting the stretched iron oxide tape To is urged in the closing direction by a torsion spring to open and close the front part of the loading pockets 2a _{1 to} 2a ₃ of the cassette housing 2A. Freely supported. The front lid 8 also constitutes a part of the exterior of the tape cassette 1A, and is formed of a resin material in an elongated shape corresponding to the wide direction (longitudinal direction) of the cassette housing 2A.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0014

[Correction method] Change

[Correction content]

[0014]

By the way, recently, a VTR for high-density recording capable of recording and / or reproducing an HDTV image such as a high-definition image or an image of a landscape screen TV at a high density is desired. In order to realize this, a high-density recording format different from the conventional standard recording format will be provided on January 8, 1993, for example, WV.
The HS standard format has been proposed. For high-density recording that can support this W-VHS standard format (W-VH
For S) tape cassettes, the cassette housing 1A is a conventional standard recording (for VHS) tape cassette because the outer shape of the cassette housing is shared with production equipment, price is reduced, and the VTR mechanism is shared. A magnetic tape that is set to have substantially the same outer dimensions as the housing 2A, has a tape width of, for example, 1/2 inch, and has a thin base film coated or evaporated with a magnetic material such as chrome ( Hereafter, referred to as a metal tape) is stored. And a newly developed high-density recording (W-VHS) tape cassette for high-density recording (W-VHS).
Alternatively, when inserted in a VTR for both standard recording and high-density recording (for both VHS and W-VHS), two-track recording and / or reproduction in the W-VHS standard format can be performed at high density. Here, the newly developed tape cassette for high-density recording (for W-VHS) has the type of magnetic tape and recording format for standard recording (for VHS).
The tape cassette for high-density recording is a VTR50 for standard recording (for VHS).
Cannot record and / or play with. Therefore, a high-density recording (W-VHS) tape cassette is used for standard recording (V-VHS).
It is necessary to prevent insertion into the VTR 50 (for HS). However, newly developed high-density recording (W
It may happen that the VHS tape cassette (for VHS) is erroneously inserted into the standard recording (VHS) VTR 50 that has already been used. At this time, as described above, the height direction of the cassette holder 51 of the VTR 50 is changed. Since it is formed higher than the height of the cassette housing 2A, the cassette holder 5
Since a gap is formed between the back surface of the top plate 51f of No. 1 and the top surface 2f of the cassette housing 2A, the user can use the front portion of the front lid side of the tape cassette for high density recording (for W-VHS). Is forcibly tilted upward, and the front portion of the cassette housing rides on the low-height erroneous insertion prevention detection piece 51b provided in front of the cassette holder 51 of the VTR 50 for standard recording (for VHS). Therefore, it is necessary to take measures beforehand.

[Procedure 3]

[Document name to be amended] Statement

[Name of item to be corrected] 0015

[Correction method] Change

[Correction content]

Therefore, erroneous insertion preventing means (8a, 2) provided on the tape cassette for high density recording (for W-VHS) and the tape cassette for standard recording (for VHS) 1A.
There is a _demand for an erroneous insertion preventing means based on the same technical idea as that of a ₆₁ ). That is, the tape cassette for high density recording (for W-VHS) is provided with an erroneous insertion preventing means capable of preventing the insertion of the tape cassette for standard recording (for VHS) into the VTR 50, and for high density recording (for W-VHS). Newly developed standard recording and high density recording tape cassette (VHS, W-VHS
There is a demand for a tape cassette for high density recording (for W-VHS), which is provided with an erroneous insertion preventing means capable of detecting an erroneous insertion even when it is inserted into a VTR (combined).

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0021

[Correction method] Change

[Correction content]

Further, in correspondence with the case where the front portion of the tape cassette 1B is forcibly tilted obliquely upward with the front lid 8 as the leading end and the tape cassette 1B is erroneously inserted into the VTR 50 for standard recording (for VHS), the cassette housing is provided. The door 9 supported by the front wall surface 2a ₂₁ of the loading pocket is openably and closably provided at the end portion of the erroneous insertion prevention virtual groove portion 2a ₆₂ formed in 2B in the insertion direction, and at the front portion of the bottom surface of the cassette housing 2B separated by the door 9. is obtained by forming a substantially straight line toward the relief groove 2a ₈ to allow insertion of at erroneous insertion state enters the standard recording erroneous insertion preventing detection member 51b ₁ of VTR50 side (for VHS) in the insertion direction rear. Therefore, the tape cassette 1B is
As will be described later, a newly developed VT with upward compatibility for standard recording and high-density recording (for both VHS and W-VHS)
The R60 is allowed to be inserted, while the conventional standard recording (for VHS) VTR 50 having a different recording format is prevented from being normally inserted by an incorrect insertion preventing means described later.

[Procedure Amendment 5]

[Document name to be amended] Statement

[Name of item to be corrected] 0023

[Correction method] Change

[Correction content]

Further, closed in the center of the loading pocket front wall portion 2a ₂₁ of the cassette housing 2B, the door 9 formed in a rigid body with a slight thickness around the shaft 10 by a torsion spring (not shown) It is biased in the direction and can be opened and closed freely. This door 9 constitutes an essential part of the present invention, and the door 9 can be opened toward the front of the cassette housing 2B, and the door 9 is provided at the back of the cassette housing 2B. It is regulated that the lid cannot be opened. Further, when the door 9 is closed, the front of the door 9 is substantially flush with the front wall surface 2a ₂₁ of the loading pocket, and
The front of the door 9 serves as the end portion in the insertion direction of the erroneous insertion prevention virtual groove portion 2a ₆₂ . In addition, the bottom surface 2 connected to the front wall surface portion 2a ₂₁ of the loading pocket in the center of the cassette housing 2B.
The front part of a, relief grooves 2a ₈ of erroneous insertion when the main part of the present invention is formed. Relief groove 2a ₈ when the erroneous insertion is formed in a shallow concave substantially straight line in front portion of the bottom surface 2a of spaced a slight distance from the insertion direction end portion of the erroneous insertion preventing virtual groove 2a ₆₂ as the thickness of the door 9 ing. Further, since the height of the door 9 is formed larger than the height of the relief groove 2a _8, insertion of the insertion preventing virtual groove 2a ₆₂ erroneously in a state where the door 9 is closed direction end portion and the relief groove 2a ₈
The insertion end portion of the door is closed by the door 9, while the door 9
In the state where the lid is opened, the erroneous insertion prevention virtual groove portion 2a ₆₂ and the escape groove portion 2a ₈ communicate with each other in a substantially straight line.
Moreover, the relief groove 2a ₈ is formed in a substantially straight line including the lamp inserting hole 2a ₇ lamp enters for detecting start and end of the metal tape Tm. Further, the length dimension of the escape groove portion 2a _{8 is} the same as the front surface 2 of the cassette housing 2B.
The distance from b to the end of the escape groove portion 2a ₈ is set to a dimension α ₁ mm or more. Therefore, the bottom surface 2a of the cassette housing 2B
The relief groove portion 2a ₈ formed on the side is for standard recording (for VHS) in which the recording format is different by forcibly tilting the front portion in the insertion direction of the tape cassette 1B obliquely upward with the wide front lid 8 as the head as described later. ) The erroneous insertion prevention virtual groove portion 2a of the cassette housing 2B when erroneously inserted into the VTR 50 of FIG.
The front of the door 9, which is the end portion of ₆₂ , is the cassette holder 51.
It enters insertion preventing detection member 51b ₁ erroneous after rides on an erroneous insertion preventing detection member 51b ₁ of lower height which is provided on the front, which has been formed to tolerate erroneous insertion into VTR50 the tape cassette 1B is there.

[Procedure correction 6]

[Document name to be amended] Statement

[Name of item to be corrected] 0030

[Correction method] Change

[Correction content]

Further, as shown in FIG.
When the tape cassette 1B is erroneously inserted into the cassette holder 61 from the same direction as (C), the height of the cassette holder 61 is slightly higher than the height dimension of the cassette housing 2B as described above. There is a slight gap between the top surface 2f of the body 2B and the back surface of the top plate 61f of the cassette holder 61. In this state, if the user mistakenly inserts the backside 2e of the tape cassette 1B into the cassette holder 61 by tilting the backside 2e, which is the front portion in the insertion direction of the tape cassette 1B, at the front with the wide backside 2e of the tape cassette 1B at the front. , The front portion of the back surface 2e of the cassette housing 2B rides on the low-height erroneous insertion prevention detection piece 61b ₁ , but if the user does not notice it and pushes the tape cassette 1B further inward, erroneous insertion prevention detection is performed. The piece 61b ₁ is the back surface 2
It enters from the front part of e in relief groove 2a ₉ formed at a slight distance. Here, since the length of the escape groove portion 2a ₉ is formed to be the dimension α ₁ mm or more as described above, the erroneous insertion prevention detection piece 61b ₁ remains in the escape groove portion 2a ₉ and the rear surface 2e. Is a stopper piece 61
is inserted until it abuts against the b _2, the tape cassette 1B is mounted on the cassette holder 61 while allowed erroneous insertion state. After that, before the cassette holder 61 reaches the lower cassette mounting position, the front lid 8 cannot be opened due to an erroneous insertion from the rear surface 2e and the eject mode is automatically entered, or immediately when the user erroneously inserts the cassette. When the user notices that the eject button 63 is pressed, the user can take out the tape cassette 1B from the cassette holder 61. At this time, since the inclined surface K in the insertion direction forwardly from the back surface 2e side in the relief groove 2a ₉ that enters erroneous insertion preventing detection member 61b ₁ is are formed, when the user draws the tape cassette 1B to the front, Wrong insertion prevention detection piece 6
1b ₁ can be easily separated from the escape groove portion 2a ₉ along the inclined surface K. Therefore, the tape cassette 1B is forcibly tilted upward in the insertion direction from the wide back surface 2e for standard recording and high density recording (VHS, W-VHS).
Forcibly pushing it into the VTR60 (for
The tape cassette 1B can be reliably taken out from the cassette holder 61, and the tape cassette 1B and VT
It can be taken out without causing any damage to R60.

[Procedure Amendment 7]

[Document name to be amended] Statement

[Correction target item name] 0033

[Correction method] Change

[Correction content]

Further, in the state shown in FIGS. 3 (C) and 4 (B), which is an essential part of the present invention, the same direction as shown in FIGS. 3 (A), (B) and 4 (A) is obtained. From tape cassette 1
When B is inserted into the cassette holder 51 by mistake, a slight gap is formed between the back surface of the top plate 51f of the cassette holder 51 and the top surface 2f of the cassette housing 2B as described above. If the front portion of the cassette housing 2B is forcibly tilted upward with the wide front lid 8 at the front and it is erroneously inserted into the cassette holder 51, erroneous insertion consisting of a space passage in the central loading pocket 2a is prevented. Since the door 9 is closed by a screw spring (not shown) at the end portion of the virtual groove 2a _{62 in} the insertion direction, a low height erroneous insertion prevention detection piece 51b ₁ provided in front of the cassette holder 51 runs on the door 9. but this remains the user will push the further deeper the tape cassette 1B without noticing, erroneous insertion preventing detection member 51b ₁ is before the bottom surface of the cassette housing 2B at a door 9 Lamp inserting hole 2a ₇ formed in the region
Enter into the escape groove portion 2a _{8 including} . Here, since the length of the escape groove portion 2a ₈ is formed to have the dimension α ₁ mm or more as described above, the erroneous insertion prevention detection piece 51b ₁ remains in the escape groove portion 2a ₈ and the cassette housing is maintained. front surface 2b of the body 2B is inserted until it abuts against the stopper 51b ₂ of the cassette holder 51, the tape cassette 1
B is placed on the cassette holder 51 while allowing the erroneous insertion state. After that, the tape cassette 1B reaches the cassette mounting position while the front lid 8 is opened with the downward movement of the cassette holder 51, and the metal tape Tm is pulled out from the cassette housing 2B to rotate with the magnetic head. When attached to a drum (not shown), it is actually fair 5-14
Although recording on the metal tape Tm is not possible due to the technical idea according to Japanese Patent No. 391, reproduction is performed only on the content already recorded on the metal tape Tm, but a good image quality is obtained here because of different recording formats and magnetic recording characteristics. Instead, the user can immediately take out the tape cassette 1B from the cassette holder 51 by pressing the eject button 53 or the like.

[Procedure Amendment 8]

[Document name to be amended] Statement

[Correction target item name] 0034

[Correction method] Change

[Correction content]

[0034] Here, as shown in FIG. 4 (C), when the eject the tape cassette 1B from the cassette holder 51, when pulled out of the tape cassette 1B in front with the ejecting operation, enters the relief groove 2a in the ₈ Since the misinsertion preventing detection piece 51b ₁ pushes the door 9 against the torsion spring (not shown), the door 9 opens the front of the cassette housing 2B around the shaft 10 (in the direction of the arrow). ,
The erroneous insertion prevention detection piece 51b ₁ can be easily separated from the escape groove 2a ₈ . Therefore, even if the front portion of the tape cassette 1B in the insertion direction is forcibly tilted upward with the front lid 8 in front and the tape cassette 1B is forcibly pushed into the VTR 50 for standard recording (for VHS) in an erroneous insertion state, the tape cassette 1B is removed from the cassette holder. It can be reliably taken out from 51, and
It can be taken out without damaging the tape cassette 1B and the VTR 50. Of course, when the erroneous insertion prevention detection piece 51b ₁ is completely removed from the escape groove portion 2a ₈ , the door 9 is closed again by a screw spring (not shown).

[Procedure Amendment 9]

[Document name to be amended] Statement

[Correction target item name] 0035

[Correction method] Change

[Correction content]

[0035]

According to the tape cassette of the present invention described in detail above, the first magnetic tape (iron oxide tape) which is recorded and reproduced in the first recording format (standard recording format) is housed in the first cassette housing. The tape cassette for the first recording format, which has substantially the same structure,
A tape cassette for the second recording format in which a second magnetic tape (metal tape) for recording / reproducing in a recording format (high density recording format) is housed in a second cassette housing having substantially the same external dimensions as the first cassette housing. In order to prevent erroneous insertion of the tape cassette for the second recording format into the first magnetic recording and / or reproducing device for recording / reproducing in the first recording format, with the front lid at the top, The mis-insertion prevention groove, which is formed to be approximately the same size as the depth from the front surface of the housing to the front wall surface of the loading pocket, is shorter than the mis-insertion prevention groove formed in the front part of the bottom surface of the first cassette housing so that it can be visually confirmed. In addition, a door supported on the front wall surface of the loading pocket is provided at the end portion of the insertion direction of the erroneous insertion prevention groove portion of the second cassette housing so as to be openable and closable. In addition, the erroneous insertion prevention detection member of the first device enters the front part of the bottom surface of the second cassette housing that separates the door, and the escape groove portion that allows the insertion in the erroneous insertion state is substantially straight toward the rear in the insertion direction. Therefore, when the user inserts the tape cassette in the cassette holder on the first device side in an erroneous insertion state while forcibly tilting the front portion in the insertion direction of the tape cassette with the front lid at the front, After the incorrect insertion prevention detection member of a low height provided in front of the cassette holder of the first device enters the incorrect insertion prevention groove portion, and the door serving as the end portion in the insertion direction of the incorrect insertion prevention groove portion is mounted,
Even if the erroneous insertion prevention detection member enters the clearance groove formed in the front part of the second cassette housing with the door separated, if the tape cassette for the second recording format is pulled out in front of the eject operation, the inside of the clearance groove is removed. Since the door is opened by the wrong insertion prevention detection member that has entered, the wrong insertion prevention detection member can be easily removed from the escape groove. Therefore, with the front lid at the top, the front portion in the insertion direction of the tape cassette for the second recording format is forcibly tilted upward and is mistakenly inserted in the cassette holder of the first device for recording / reproducing in the first recording format. Even if you push it forcefully,
The tape cassette for the second recording format can be reliably taken out from the cassette holder of the first device, and
It can be taken out without damaging the tape cassette for the second recording format and the first device.

[Procedure Amendment 10]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 5

[Correction method] Change

[Correction content]

[Figure 5]

Claims (1)

[Claims] 1. A first magnetic tape to be recorded / reproduced in a first recording format is wound around a pair of reels and housed in a substantially rectangular first cassette housing, and the front side of the first cassette housing. A front lid that is openable and closable so as to cover the first magnetic tape stretched by a loading pocket formed in a region is supported by the first cassette housing, and the front lid is at the top of the loading pocket. The incorrect insertion prevention groove formed in the front portion of the bottom surface connected to the front wall portion of the loading pocket formed on the front side of the first magnetic recording and / or reproducing apparatus is normally provided in the wrong insertion prevention detection member of low height. A second magnetic tape, which has substantially the same structure as a tape cassette for the first recording format to be inserted and is recorded and reproduced in the second recording format, is the first cassette housing. It is housed in a second cassette housing having substantially the same external dimensions as that of the first cassette housing, and is short enough to be visually recognized from the erroneous insertion prevention groove portion of the first cassette housing with the front lid at the front and the front surface of the second cassette housing. The incorrect insertion prevention groove formed in the depth dimension from the front wall of the loading pocket to the front wall of the loading pocket is normal for the incorrect insertion prevention detection member at the back of the cassette holder of the second magnetic recording and / or reproducing apparatus. A tape cassette for a second recording format to be inserted into a cassette, which corresponds to a case where the second cassette housing is erroneously inserted into the cassette holder of the first device while the front lid is at the top.
A door supported on the front wall surface of the loading pocket is provided at an end portion in the insertion direction of the erroneous insertion prevention groove portion of the second cassette housing so as to be openable and closable, and the first operation is accompanied by the insertion operation.
An erroneous insertion prevention detection member on the device side enters the rear end of the erroneous insertion prevention groove portion after the door has been ridden from the insertion direction end portion, and the escape groove portion that allows the insertion in the erroneous insertion state is separated from the second cassette casing. It is formed in a substantially straight line in the front part of the bottom surface of the body toward the rear in the insertion direction, and is formed on the cassette holder of the first device and the cassette holder of the second device of the second cassette housing with the front lid at the top. While the door is kept closed at the time of insertion, when the wrong insertion prevention detection member on the side of the first device enters the clearance groove portion of the second cassette housing, the wrong insertion is caused due to the eject operation. A tape cassette characterized in that the door is opened to facilitate the removal of the prevention detection member.