JPH06223460A - Recording and reproducing device - Google Patents

Abstract

PURPOSE:To use different kinds of cassettes in a video tape recorder and to impart a function for preventing such a cassette from being inserted into a wrong direction by preventing the cassette from being inserted into the video tape recorder when the cassette is inserted into the wrong direction because an engagement projecting part advanced in an advancing position is abutted against the cassette. CONSTITUTION:A misinsertion preventing member 10 for preventing the cassette from being inserted in the wrong direction is provided on a placing table 2 of a slider of the video tape recorder, and this misinsertion preventing member 10 has the engagement projecting parts 15a and 15b capable of engaging with a guide groove of the cassette. These engagement projecting parts 15a and 15b are provided to be freely movable into the advancing position for engaging with the guide groove and the retreating position for releasing the engagement with the guide groove, and also, for instance, when the engagement projecting part 15a is advanced into the advancing position, the engagement projecting part 15b is retreated into the retreating position.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording / reproducing apparatus such as an audio tape recorder or a video tape recorder which records / reproduces information on / from the recording medium using a cassette containing a recording medium such as a magnetic tape. It is a thing.

[0002]

2. Description of the Related Art Conventionally, for example, in a video tape recorder, a VHS cassette or a S-recorder containing a magnetic tape is built.
A VHS cassette (hereinafter referred to as a first cassette) is commercially available, and at a predetermined position on the back surface of the first cassette,
A guide groove is formed to regulate the insertion direction into the video tape recorder. A conventional video tape recorder will be described below with reference to FIGS. 27 and 28.

As shown in FIGS. 27 and 28, the conventional video tape recorder has a slider 100 for transferring the first cassette 110 inserted from an insertion opening (not shown) to a predetermined position of a cassette housing (not shown). This slider 100 has a mounting table 101 on which the inserted first cassette 110 is mounted. In order to prevent the first cassette 110 from being inserted in the wrong direction, an erroneous insertion prevention protrusion 102 that engages with the guide groove 111 of the first cassette 110 is fixed to the mounting table 101.

The erroneous insertion preventing projection 102 engages with the guide groove 111 of the first cassette 110 when the first cassette 110 is inserted in the correct direction, and the first cassette 11 is inserted.
0 does not prevent the first cassette 110 from being placed on the mounting table 101, but when the first cassette 110 is inserted in the wrong direction, that is, when the front and rear or front and back of the first cassette 110 are mistakenly inserted, the cassette of the first cassette 110 It comes into contact with the lid 112 or the like to prevent the first cassette 110 from being placed on the placing table 101.

By the way, in recent years, in order to support, for example, a high-definition system or a digital system, a high-definition cassette, a digital cassette or the like (hereinafter referred to as a second cassette) is developed, and information is recorded on the second cassette. Development of a video tape recorder for reproduction is in progress. The above-mentioned second cassette contains magnetic tape, such as metal tape, which has different characteristics from the iron oxide tape and cobalt iron oxide tape contained in the first cassette, and has a higher information density than the first cassette. It is possible to record and reproduce, that is, to obtain high quality and high resolution.

A video tape recorder (hereinafter referred to as a second cassette video) for recording / reproducing information on the second cassette records / reproducing information on the first cassette in order to maintain cassette compatibility. However, the conventional video tape recorder (hereinafter referred to as the video for the first cassette) that records / reproduces information in / from the first cassette does not cause any inconvenience in recording / reproducing of information. As such, it is necessary to prevent the insertion of the second cassette.

Therefore, in order to prevent the second cassette from being inserted into the video for the first cassette by mistake, it is proposed to form the guide groove of the second cassette at a position different from the guide groove of the first cassette. Has been done. In this case, the erroneous insertion prevention protrusion for the first cassette provided on the slider of the video for the first cassette contacts the second cassette, so that the second cassette cannot be inserted.

[0008]

However, if the guide grooves are formed at different positions in the second cassette and the first cassette, the following problems will occur in the video for the second cassette.

That is, for example, as shown in FIGS. 29 and 30, the slider 100 'in the video for the second cassette.
It is assumed that the mounting table 101 ′ is provided with an erroneous insertion prevention protrusion 102 ′ that engages with a guide groove of the first cassette (not shown).
Then, the erroneous insertion preventing protrusion 102 'comes into contact with the cassette lid 112' of the second cassette 110 'and cannot engage with the guide groove 111' of the second cassette 110 ', so that it is inserted in the correct direction. The mounting of the second cassette 110 ′ on the mounting table 101 ′ is hindered.

Although not shown, the guide groove 1 of the second cassette 110 'is mounted on the mounting table 101' of the slider 100 '.
When an erroneous insertion prevention protrusion that engages with 11 'is provided, this erroneous insertion prevention protrusion contacts the cassette lid of the first cassette and prevents the first cassette inserted in the correct direction from being placed on the mounting table 101'. It will be.

Therefore, if the guide groove of the second cassette is formed at a position different from the guide groove of the first cassette in order to prevent the second cassette from being accidentally inserted into the video for the first cassette, the slider of the first cassette is In the above-mentioned video for the second cassette in which the erroneous insertion preventing protrusion is fixed to the mounting table, either one of the first cassette and the second cassette cannot be inserted.

In view of the above problems, the present invention is such that when a cassette having grooves formed at different positions depending on the characteristics of the recording medium is used, the cassette is inserted in the wrong direction, that is, before or after the cassette or It is an object of the present invention to provide a recording / reproducing device having a function of preventing front and back from being inserted by mistake.

[0013]

In order to solve the above-mentioned problems, the recording / reproducing apparatus of the present invention has a built-in recording medium, and the groove for regulating the insertion direction into the apparatus is the recording medium. Recording / reproducing apparatus using a cassette formed at different positions depending on the characteristics of the recording medium, and having a transfer means for transferring the cassette inserted in the apparatus to a predetermined position in the apparatus when recording / reproducing information on the recording medium. The transfer means is provided with an erroneous insertion prevention member for preventing the cassette from being inserted in an erroneous direction, and the erroneous insertion prevention member is a protrusion that engages with a groove formed in the cassette. At least two, and these protrusions are movably provided in an advance position where they can be engaged with the groove and a retracted position where they disengage from the groove, and one protrusion is in the advance position. When expanding to Rino projections are characterized by regress degenerative positions.

In order to solve the above-mentioned problems, a recording / reproducing apparatus according to a second aspect of the present invention has a built-in recording medium, and a groove for restricting the insertion direction into the apparatus is located at a different position depending on the characteristics of the recording medium. A recording / reproducing apparatus comprising a transfer means for transferring a cassette inserted in an apparatus to a predetermined position in the apparatus when recording / reproducing information on / from the recording medium using a formed cassette. Means include
An erroneous insertion prevention member for preventing the cassette from being inserted in the wrong direction is provided, and the erroneous insertion prevention member has at least two protrusions that engage with the grooves formed in the cassette. Is provided movably in an advance position where it can be engaged with the groove and a retracted position where it disengages from the groove, and when one protrusion advances to the advance position, the remaining protrusions Retreat to the retracted position, and at least one of the protrusions is urged toward the advanced position.

In order to solve the above-mentioned problems, a recording / reproducing apparatus according to a third aspect of the invention has a built-in recording medium, and a groove for restricting the inserting direction into the apparatus is located at a position different depending on the characteristics of the recording medium. A recording / reproducing apparatus comprising a transfer means for transferring a cassette inserted in an apparatus to a predetermined position in the apparatus when recording / reproducing information on / from the recording medium using a formed cassette. Means include
A cassette erroneous insertion prevention member for preventing the cassette from being inserted in the wrong direction is provided, and the cassette erroneous insertion prevention member has a protrusion that engages with a groove formed in the cassette. It is characterized in that it is provided so as to be movable substantially in the width direction of the cassette inserted in the apparatus.

In order to solve the above-mentioned problems, a recording / reproducing apparatus according to a fourth aspect of the present invention has a built-in recording medium, and a groove for restricting the insertion direction into the apparatus is located at a different position depending on the characteristics of the recording medium. A recording / reproducing apparatus comprising a transfer means for transferring a cassette inserted in an apparatus to a predetermined position in the apparatus when recording / reproducing information on / from the recording medium using a formed cassette. Means include
A cassette erroneous insertion prevention member for preventing the cassette from being inserted in the wrong direction is provided, and the cassette erroneous insertion prevention member has a protrusion that engages with a groove formed in the cassette. It is characterized in that it is provided so as to be movable substantially in the width direction of the cassette inserted into the apparatus and is biased in the direction opposite to the insertion direction of the cassette.

In order to solve the above-mentioned problems, a recording / reproducing apparatus according to a fifth aspect of the invention has a built-in recording medium and the groove for restricting the insertion direction into the apparatus is located at a different position depending on the characteristics of the recording medium. A recording / reproducing apparatus comprising a transfer means for transferring a cassette inserted in an apparatus to a predetermined position in the apparatus when recording / reproducing information on / from the recording medium using a formed cassette. Means include
A cassette erroneous insertion prevention member for preventing the cassette from being inserted in the wrong direction is provided, and the cassette erroneous insertion prevention member has a protrusion that engages with a groove formed in the cassette. It is characterized in that it is provided so as to be movable substantially in the width direction of the cassette inserted into the apparatus, and that it engages with the groove at both ends of its movable range.

In order to solve the above-mentioned problems, a recording / reproducing apparatus according to a sixth aspect of the invention has a built-in recording medium, and the groove for regulating the insertion direction into the apparatus is located at a different position depending on the characteristics of the recording medium. A recording / reproducing apparatus comprising a transfer means for transferring a cassette inserted in an apparatus to a predetermined position in the apparatus when recording / reproducing information on / from the recording medium using a formed cassette. Means include
A preventive member is provided to prevent the cassette from being inserted in the wrong direction, and the preventive member has an engaging portion that engages with a groove formed in the cassette, and the engaging portion is provided in the groove. It is movably provided at an engageable engagement position and a release position for releasing the engagement with the groove, and is moved between the engagement position and the release position by being pressed by the inserted cassette. Is characterized by.

In order to solve the above problems, a recording / reproducing apparatus according to a seventh aspect of the present invention has a built-in recording medium, and the groove for regulating the inserting direction into the apparatus is located at a position different depending on the characteristics of the recording medium. A recording / reproducing apparatus comprising a transfer means for transferring a cassette inserted in an apparatus to a predetermined position in the apparatus when recording / reproducing information on / from the recording medium using a formed cassette. The means has a mounting table on which the cassette is mounted, and the mounting table is provided with a prevention member for preventing the cassette from being inserted in the wrong direction, and the prevention member is a groove formed in the cassette. An engaging portion that engages with, and the engaging portion is movably provided in an engaging position where the groove can be engaged and a releasing position where the engagement with the groove is released. It has a feature.

[0020]

According to the constitutions of claims 1 and 2,
An erroneous insertion preventing member for preventing the cassette from being inserted in an erroneous direction is provided in the transfer means for transferring the cassette inserted in the device to a predetermined position in the device. It has at least two protrusions that are engaged with the grooves formed in the above that regulate the insertion direction into the device. The protrusion is movably provided in an advance position where it can be engaged with the groove formed at a position different depending on the characteristics of the recording medium, and a retracted position where the engagement with the groove is released, and When one protrusion advances to the advance position, the remaining protrusions retreat to the retracted position.

Thus, when the cassette is inserted into the apparatus in the correct direction, one of the protrusions of the erroneous insertion preventing member that is advanced to the advanced position is engaged with the groove formed in the cassette. Further, at this time, the remaining protrusions are retracted to the retracted position, so that they do not contact the cassette. Therefore, the cassette can be inserted into the device. On the other hand, when the cassette is inserted in the wrong direction with respect to the device, that is, when the front and rear or front and back of the cassette are mistakenly inserted, the protrusion protruding to the advance position can engage with the groove formed in the cassette. Instead, it contacts the cassette. Therefore,
The cassette cannot be inserted into the device. Therefore, when using a cassette in which the groove that regulates the insertion direction into the device is formed at a different position depending on the characteristics of the recording medium, different types of cassettes can be used in the recording / reproducing device, and those cassettes may be erroneous. It is possible to add the function of preventing the cassette from being inserted in the opposite direction, that is, the front and rear of the cassette or the front and back sides being mistakenly inserted.

Moreover, according to the structure of the second aspect, among the protrusions that engage with the groove that regulates the insertion direction into the device,
At least one is urged toward the advanced position where it can engage with the groove.

As a result, it is possible to more reliably prevent the cassette from being inserted in the wrong direction, that is, the front and rear sides or the front and back of the cassette from being incorrectly inserted.

According to the third and fifth aspects, the cassette for preventing the cassette from being inserted in the wrong direction in the transfer means for transferring the cassette inserted in the device to a predetermined position in the device. An erroneous insertion prevention member is provided, and the cassette erroneous insertion prevention member has a projection portion that engages with a groove formed in the cassette to regulate the insertion direction into the device. Further, the above-mentioned protrusion is provided so as to be movable in the substantially width direction of the cassette inserted in the apparatus.

Thus, when the cassette is inserted into the apparatus in the correct direction, the projection of the cassette erroneous insertion preventing member is engaged with the groove formed in the cassette by moving substantially in the width direction of the cassette. Therefore, the cassette can be inserted into the device. On the other hand, when the cassette is inserted in the wrong direction with respect to the device, that is, when the cassette is inserted in the front or rear or the front and back sides by mistake, the protrusions are not aligned with the grooves formed in the cassette even if they are moved in the width direction of the cassette. Unable to engage and abut the cassette. Therefore, the cassette cannot be inserted into the device. Therefore, when using a cassette in which the groove that regulates the insertion direction into the device is formed at a different position depending on the characteristics of the recording medium, it is possible to use different types of cassettes in the recording / reproducing device.
In addition, it is possible to add a function of preventing the cassettes from being inserted in the wrong direction, that is, preventing the cassettes from being inserted in the front or rear or the front and back.

Moreover, according to the structure of the fourth aspect, the protrusion engaging with the groove for restricting the inserting direction into the apparatus is biased in the direction opposite to the inserting direction of the cassette.

This makes it possible to move the protrusion in the substantially width direction of the cassette inserted in the apparatus without using any special means for moving the protrusion.

According to the fifth aspect of the present invention, the protrusion engaging with the groove for restricting the insertion direction into the device engages with the groove at both ends of its movable range.

Thus, when the cassette is inserted in the correct direction with respect to the apparatus, the protrusion can be more reliably engaged with the groove formed in the cassette.

According to the structure of claim 6, the preventing means for preventing the cassette from being inserted in the wrong direction is provided in the transfer means for transferring the cassette inserted in the device to a predetermined position in the device. The prevention member has an engaging portion that engages with a groove formed in the cassette and that regulates the insertion direction into the device. The engagement portion is movably provided at an engagement position at which the groove is formed at a different position depending on the characteristics of the recording medium, and a release position at which the engagement with the groove is released. At the same time, it is moved between the engagement position and the release position by being pressed by the inserted cassette.

Thus, the engaging portion can be moved between the engaging position and the releasing position without using any special means for moving the engaging portion.

According to the structure described in claim 7, the transfer means for transferring the cassette inserted in the apparatus to a predetermined position in the apparatus has a mounting table on which the cassette is mounted, and the mounting table has:
A preventive member for preventing the cassette from being inserted in the wrong direction is provided, and the preventive member has an engaging portion that engages with a groove formed in the cassette for restricting the inserting direction into the device. is doing. The engaging portion is movably provided at an engaging position capable of engaging with the groove formed at a position different depending on the characteristics of the recording medium and a releasing position for releasing the engagement with the groove. ing.

As a result, the mounting base for mounting the cassette is provided with the prevention member, so that only a small space is required.
It is possible to add a function of preventing the cassette from being inserted in the wrong direction, that is, the cassette from being inserted in the front or back or from the front and back by mistake.

[0034]

【Example】

[Embodiment 1] The following description will discuss Embodiment 1 of the present invention with reference to FIGS. 1 to 18. still,
In the following description, a video tape recorder (recording / reproducing apparatus) that records / reproduces information on / from the above-mentioned magnetic tape using a first cassette and a second cassette (cassette) each containing a magnetic tape (recording medium) having different characteristics. ) Is taken as an example.

First, referring to FIGS. 6 to 10,
The first cassette and the second cassette used in the video tape recorder according to this embodiment will be described.

As shown in FIGS. 6 to 8, the first cassette 81 contains a magnetic tape (not shown) such as an iron oxide tape or a cobalt iron oxide tape, and is provided on the front surface of the first cassette 81. Is provided with a cassette lid 82 for protecting the magnetic tape. Further, on the back surface 81a of the first cassette 81, a supply reel around which a magnetic tape is wound, and a reel into which a rotation shaft (not shown) for rotating a take-up reel (neither shown) for winding the magnetic tape is inserted. Holes 83a, 83b, a release hole 83c for releasing a reel brake (not shown), a lamp hole 84 for inserting a cassette lamp (not shown) for detecting winding start / winding end / tape break of the magnetic tape, and the first in the video tape recorder. Restriction holes 85a and 85b for restricting the mounting position of the cassette 81 are opened. Further, the back surface 81a is provided with notches 86a, 86b, 86c into which capstan shafts, loading poles and the like (not shown) are inserted.

On the back surface 81a of the above-mentioned first cassette 81, a guide groove (groove) 89 for restricting the inserting direction of the first cassette 81 into the slider 1 (FIG. 1) described later is provided. The guide groove 89 is formed along the insertion direction of the first cassette 81 at approximately the center of the back surface 81 a in the width direction, and extends also to the cassette lid 82. The guide groove 89 is formed so that a part thereof overlaps the ramp hole 84 and the cutout portion 86b.

As shown in FIGS. 9 and 10, the second cassette 91 contains a magnetic tape (not shown), such as a metal tape, for example.
A cassette lid 92 for protecting the magnetic tape is provided. Further, on the back surface 91a of the second cassette 91, like the first cassette 81, the reel holes 83a
b, the release hole 83c, the ramp hole 84, and the regulation hole 85a.
・ 85b and are opened. Further, the back surface 91a is provided with notches 86a, 86b, 86c.

A guide groove (groove) 99 for restricting the inserting direction of the second cassette 91 into the slider 1 (FIG. 1) described later is provided on the back surface 91a of the second cassette 91. The guide groove 99 is formed closer to the reel hole 83b than the center of the back surface 91a in the width direction, along the insertion direction of the second cassette 91, and also extends to the cassette lid 92. That is, the characteristics of the magnetic tape contained in the second cassette 91 and the formation position of the guide groove 99 are the same as the characteristics of the magnetic tape contained in the first cassette 81 and the formation position of the guide groove 89. Other than different,
It has almost the same configuration as the first cassette 81.

As shown in FIGS. 1 and 2, the video tape recorder as the recording / reproducing apparatus according to the present embodiment,
The slider 1 as a transfer means for transferring the first cassette 81 and the second cassette 91 (hereinafter, referred to as cassettes 81, 91) inserted from an insertion opening (not shown) to a predetermined position in the video tape recorder, that is, a predetermined position of the cassette housing. Is equipped with. The slider 1 has a mounting table 2 on which the inserted cassettes 81 and 91 are mounted. The mounting table 2 has the cassettes 81 and 91 mounted thereon.
Are formed in the portions corresponding to the reel holes 83a and 83b. Guide pins 1a are provided on both sides of the mounting table 2 in the width direction,
The guide pins 1a, 1a are guided by guide rails (not shown), so that the cassettes 81.9 on the mounting table 2 are guided.
1 is transferred to a predetermined position of the cassette housing. The cassettes 81 and 91 transferred to the predetermined positions of the cassette housing are tape-loaded, and information is recorded / reproduced on / from the magnetic tape.

Further, while convex portions 2b, 2b are formed in the mounting table 2 in the insertion direction, convex portions 1b, 1b are provided above the mounting table 2, and these convex portions 2b, 2b.
The inserted cassettes 81 and 91 can be mounted on the mounting table 2 at predetermined positions by the units 1b and 1b.

Cassettes 81 and 91 are provided on the rear surface 2c side of the central portion in the width direction (left and right direction in FIG. 2) of the mounting table 2 described above.
Is inserted in the wrong direction, that is, the cassette 81.
An erroneous insertion preventing member (erroneous insertion preventing member, preventing member) 10 for preventing the front and back or front and back of 91 from being inserted erroneously.
Is installed. As shown in FIGS. 3 to 5, the erroneous insertion preventing member 10 has a shaft 12 penetrating the center thereof, and the shaft 12 is fitted in the holes of the bearings 11 and 11. The above-mentioned bearings 11 and 11 are provided with their center portions along the insertion direction of the cassettes 81 and 91,
Therefore, the shaft 12 is supported so as to be parallel to the insertion direction of the cassette 81/91. As a result, the erroneous insertion prevention member 10 is provided with the shaft 12 as shown in FIGS. 5 (a) and 5 (b).
It is rotatable about the rotation center in the A ₁ -A ₂ direction.

The bearings 11 and 11 are mounted on the mounting table 2
Is formed by cutting and raising a part of the bearing 11 on the back surface 2c side. Therefore, the mounting table 2 is formed with openings 2g and 2g after cutting and raising the bearings 11 and 11.

The erroneous insertion preventing member 10 has a width direction (see FIG. 3).
The engaging protrusions (protrusions, engaging portions) 15a and 15b are provided on both sides of the mounting table 2 in the left and right directions.
The mounting table 2 is provided with openings 2e and 2f at positions corresponding to the engaging protrusions 15a and 15b. Therefore, as shown in FIG.
When rotated in _one direction, the engaging projection 15a advances from the opening 2e to the surface 2d side of the mounting table 2 (advance position,
On the other hand, the engaging protrusion 15b retracts from the opening 2f to the back surface 2c side of the mounting table 2 (retracting position, releasing position),
On the contrary, as shown in FIG. 2B, when the misinsertion preventing member 10 rotates in the A ₂ direction, the engaging projection 15b advances from the opening 2f to the surface 2d side of the mounting table 2 (advance). On the other hand, the engaging protrusion 15a retracts from the opening 2e toward the back surface 2c of the mounting table 2 (retracting position, releasing position). The engaging protrusions 15a and 15b are formed in such sizes and positions that they can be engaged with the guide grooves 89 and 99 of the cassettes 81 and 91, respectively.

That is, the engaging projection 15 that has advanced to the advanced position
a can be engaged with the guide groove 89 of the first cassette 81 mounted on the mounting table 2, while the engaging projection 15b that has advanced to the advanced position is mounted on the mounting table 2. The guide groove 99 of the formed second cassette 91 can be engaged. Further, the engaging protrusion 15a that has retreated to the retracted position does not come into contact with the second cassette 91 placed on the mounting table 2, while the engaging protrusion 15b that has retracted to the retracted position does not. It does not come into contact with the first cassette 81 placed on the placing table 2. The erroneous insertion prevention member 10
Is not biased in any of the A ₁ -A ₂ directions, therefore, as shown by the alternate long and short dash line in FIG. Surface 2
It is also possible to be in the state of advancing to the d side, that is, to be located between the advancing position and the retreating position.

Further, the erroneous insertion prevention member 10 is made of A ₁ -A
When rotated in _two directions, either one of the upper surfaces 10a and 10b comes into contact with the back surface 2c of the mounting table 2. Therefore, the erroneous insertion prevention member 10 has A ₁ -A ₂
When rotated in the direction, the portions other than the engaging projections 15a and 15b do not advance to the surface 2d side of the mounting table 2. Further, the engaging projections 15a and 15b have a substantially trapezoidal shape having slopes 16 ... at their upper portions so that they can be easily engaged with the guide grooves 89 and 99 of the cassettes 81 and 91, respectively.

Regarding the erroneous insertion preventing operation of the erroneous insertion preventing member 10 having the above-mentioned structure when the cassette 81 or 91 is inserted,
This will be described below with reference to FIGS. 11 to 18. still,
In the following description, the slider 1 is attached to the first cassette 81.
The case of inserting is taken as an example.

Engagement protrusion 15 of erroneous insertion prevention member 10
When the first cassette 81 is inserted in the correct direction in the state where a has advanced to the advance position (that is, the state shown in FIG. 5A), as shown in FIG. 11 and FIG. 15a engages with the guide groove 89 of the first cassette 81. On the other hand, since the engaging protrusion 15b is retracted to the retracted position, it does not prevent the insertion of the first cassette 81. Therefore,
As shown in FIG. 13, the inserted first cassette 81 is
It is placed at a predetermined position on the placing table 2.

Engagement protrusion 15 of erroneous insertion prevention member 10
When the first and second cassettes 81 are inserted in the correct direction in the state where each of the a and 15b has advanced to the surface 2d side of the mounting table 2 by about half (that is, the state indicated by the alternate long and short dash line in FIG. 5B). As shown in FIGS. 14 to 16, the engagement protrusion 15 b contacts the cassette lid 82 of the first cassette 81. Then, the slope 16 of the engaging projection 15b is pressed by the first cassette 81 and is moved downward by the pressing force,
Retreat to the retreat position. That is, the incorrect insertion preventing member 10 is A ₁
Rotate in the direction. On the other hand, the engaging protrusion 1 that has advanced to the advanced position by rotating the erroneous insertion prevention member 10 in the A ₁ direction
5a engages with the guide groove 89 of the first cassette 81.
Therefore, in the same state as described above, the inserted first cassette 81 is placed at a predetermined position on the placing table 2.

Engagement protrusion 15 of erroneous insertion prevention member 10
Even when the first cassette 81 is inserted in the correct direction with b being advanced to the advanced position (that is, the state shown by the solid line in FIG. 5B), the engagement protrusion 15 b still retains the first cassette 81. It moves downward due to the pressing force of 81 and retreats to the retracted position. Therefore, similarly to the above, the inserted first cassette 81 is mounted at a predetermined position on the mounting table 2.

Engagement protrusion 15 of erroneous insertion prevention member 10
The first cassette 81 was inserted in the wrong direction in the state where each of a and 15b has advanced to the surface 2d side of the mounting table 2 by about half (that is, the state shown by the dashed line in FIG. 5B). At this time, that is, when the front and rear sides or the front and back of the first cassette 81 are mistakenly inserted, as shown in FIGS. 17 and 18, the engaging protrusions 15a and 15b are provided on the back surface 81b (or the cassette lid 82) of the first cassette 81. Abut. Then, for example, the engagement protrusion 15b tends to move downward due to the pressing force when pressed by the first cassette 81. However, since the first cassette 81 is inserted in the wrong direction, the engaging protrusion 15a that has advanced to the front surface 2d side.
Cannot engage with the guide groove 89. That is, the engagement protrusion 15a comes into contact with the first cassette 81 when it is rotated in the A ₁ direction.

Similarly, the engaging protrusion 15a also tries to move downward due to the pressing force of the first cassette 81, but the guide groove that engages with the engaging protrusion 15b that has advanced to the surface 2d side has the first cassette 81. Since the engaging projection 15b is not formed on the first cassette 8 when it is rotated in the A ₂ direction.
It comes into contact with 1. Therefore, the incorrect insertion prevention member 10
Of the first cassette 8
Since 1 is not mounted on the mounting table 2, it is prevented that it is inserted in the wrong direction, that is, the front and back or the front and back are inserted by mistake.

Engagement protrusion 15 of erroneous insertion prevention member 10
a is in the advanced position (that is, the state shown in FIG. 5A), or the engaging projection 15b of the misinsertion preventing member 10 is in the advanced position (that is, FIG. 5).
In the state shown by the solid line in (b)), even when the first cassette 81 is inserted in the wrong direction, that is, when the front and rear sides or the front and back of the first cassette 81 are mistakenly inserted, the engaging protrusion 1
5a and 15b contact the back surface 81b of the first cassette 81 or the cassette lid 82. That is, the incorrect insertion prevention member 10
Even if the engaging protrusions 15a and 15b are rotated in the A ₁ -A ₂ direction, they contact the first cassette 81. Therefore, the same state as the above is obtained, and the first cassette 81 is not placed on the placing table 2, so that the first cassette 81 is prevented from being inserted in the wrong direction.

In the above description, the case where the first cassette 81 is inserted into the slider 1 is taken as an example. However, even when the second cassette 91 is inserted instead of the first cassette 81, the erroneous insertion preventing member is inserted. Numeral 10 prevents the second cassette 91 from being inserted in the wrong direction by the erroneous insertion preventing operation similar to the above-mentioned items. That is, the second cassette 91
Is inserted in the correct direction, the engaging projection 15b that has advanced to the advanced position engages with the guide groove 99 of the second cassette 91, while the engaging projection 15a retracts to the retracted position and the second cassette 91 Since the insertion of the second cassette 91 is not hindered, the inserted second cassette 91 is placed at a predetermined position on the placing table 2.
When the second cassette 91 is inserted in the wrong direction,
That is, when the front and rear sides or the front and back sides of the second cassette 91 are mistakenly inserted, the engaging projections 15a and 15b come into contact with the back surface 91b of the second cassette 91 and so on.
1 is not placed on the mounting table 2 and is prevented from being inserted in the wrong direction.

As described above, it is possible to prevent the cassettes 81 and 91 from being inserted into the slider 1 of the video tape recorder in the wrong direction, that is, the front and back of the cassettes 81 and 91 or the front and back of the cassettes 81 and 91 being inserted by mistake. An erroneous insertion prevention member 10 for preventing the erroneous insertion prevention member 10 is provided.
It has engaging protrusions 15a and 15b which can be engaged with the guide grooves 89 and 99 of the cassettes 81 and 91. The engaging projections 15a and 15b are movably provided at an advanced position where they engage with the guide grooves 89 and 99 and a retracted position where they disengage from the guide grooves 89 and 99, and For example, when the engaging protrusion 15a advances to the advance position, the engaging protrusion 15b retracts to the retracted position.

Thus, for example, when the first cassette 81 is inserted in the correct direction with respect to the video tape recorder, the guide projection 89 engages with the engaging projection 15a which is advanced to the advanced position. Further, at this time, since the engaging protrusion 15b is retracted to the retracted position, the first cassette 8
Do not touch 1. Therefore, the first cassette 81 can be inserted into the video tape recorder. On the other hand, for example,
When the first cassette 81 is inserted in the wrong direction with respect to the video tape recorder, that is, when the front and rear sides or the front and back of the first cassette 81 are incorrectly inserted, the engaging protrusion 15a that has advanced to the advanced position is guided. It cannot be engaged with the groove 89 and comes into contact with the first cassette 81. Therefore, the first cassette 81 cannot be inserted into the video tape recorder.

Therefore, when using the cassettes 81 and 91 in which the guide grooves 89 and 99 are formed at different positions depending on the characteristics of the recording tape, different types of cassettes 81 and 91 can be used in the video tape recorder, and It is possible to add a function of preventing the cassettes 81 and 91 from being inserted in the wrong direction, that is, preventing the cassettes 81 and 91 from being inserted in the front or rear or the front and back sides by mistake.

In the first embodiment described above, the erroneous insertion preventing member 10 is not biased in any of the directions A ₁ -A ₂ , but the erroneous insertion preventing member 10 is prevented by a spring or the like. The member 10 may be biased in the A ₁ direction or the A ₂ direction. In this case, it is possible to achieve the same actions and effects as those of the above-described first embodiment, and the cassettes 81 and 91 are inserted in the wrong direction, that is, the front and back or front and back of the cassettes 81 and 91 are It is possible to more reliably prevent the wrong insertion. Further, in the above-described first embodiment, one erroneous insertion prevention member 10 is provided, but of course, two or more erroneous insertion prevention members 10 may be provided.

[Second Embodiment] The second embodiment of the present invention will be described below with reference to FIGS. 19 to 26. For convenience of explanation, members having the same functions as those shown in the drawings of the first embodiment will be designated by the same reference numerals, and the description thereof will be omitted.

As shown in FIGS. 19 and 20, the cassette 8 is mounted on the mounting table 2 of the slider 1'provided in the video tape recorder as the recording / reproducing apparatus according to the present embodiment.
A cassette erroneous insertion prevention member (cassette erroneous insertion prevention member, prevention member) 30 that prevents the 1.91 from being inserted in the wrong direction, that is, the cassette 81. It is provided.

The cassette erroneous insertion prevention member 30 is installed on the back surface 2c side of the center portion of the mounting table 2 in the width direction (left and right direction in FIG. 20). The cassette erroneous insertion prevention member 30 has one end supported by a support shaft 31 erected on the back surface 2c of the mounting table 2 and is rotatable in the B ₁ -B ₂ directions. In addition, the cassette erroneous insertion prevention member 3
A substantially cylindrical engagement protrusion (projection, engagement portion) 32 is provided on the other side of the mounting table 2 on the side of the mounting table 2, while the mounting table 2 corresponds to the above-described engaging projection 32. A substantially arcuate opening 33 is provided at the position. Therefore, as shown in FIG. 20, the engagement protrusion 32 is configured to protrude from the opening 33 to the surface 2d side of the mounting table 2.

The above cassette erroneous insertion prevention member 30 includes
A spring 34 fixed to the back surface 2c side of the mounting table 2 is attached, and is biased by the spring 34 in the counterclockwise direction B ₁ direction. Therefore, when the pressing force by the cassette 81/91 is not applied to the engagement protrusion 32, the engagement protrusion 32 comes into contact with the left side edge 33a of the opening 33, while the engagement protrusion 32 is When the protrusions 32 are pressed by the cassettes 81 and 91, the cassette erroneous insertion prevention member 30 rotates in the clockwise direction B ₂ and the engaging protrusions 32 are inserted into the right side edge of the opening 33. Part 3
It comes into contact with 3b. That is, the engagement protrusion 32 of the cassette erroneous insertion prevention member 30 is movable in the substantially width direction of the cassette 81/91 inserted into the slider 1 '.

The above-mentioned engaging projection 32 is formed in the cassette 81.
It is formed on the mounting table 2 at a position (engagement position) in which it is formed in a thickness and height that can be engaged with the guide grooves 89 and 99 of 91, and is in contact with the left edge portion 33a of the opening 33. While engaging with the guide groove 89 of the first cassette 81, the opening 3
The guide groove 99 of the second cassette 91 mounted on the mounting table 2 at a position (engagement position) where it abuts on the right edge portion 33b of the third cassette 3.
Is adapted to engage with. The other structure of the slider 1'is the same as the structure of the slider 1 of the first embodiment.

The cassette erroneous insertion preventing member 30 having the above structure
The erroneous insertion preventing operation when inserting the cassette 81/91 will be described below with reference to FIGS. 19 to 26.

First, when the first cassette 81 is inserted in the correct direction, as shown in FIG. 21 and FIG. 22, the spring 34 urges the first cassette 81 in the B ₁ direction to contact the left edge 33a of the opening 33. The engaging protrusion 32 on the guide groove 8 does not contact the cassette lid 82 of the first cassette 81.
Engage with 9. Therefore, the inserted first cassette 81
Is placed at a predetermined position on the placing table 2.

Next, when the second cassette 91 is inserted in the correct direction, as shown in FIG. 19 and FIG. 20, the engaging projection portion urged to the position where it abuts against the left side edge 33a of the opening 33. 32 contacts the cassette lid 92 of the second cassette 91. The cassette erroneous insertion prevention member 30
23A is rotatable, the engaging protrusion 32 is pressed by the second cassette 91 and is rotated in the B ₂ direction by this pressing force, as shown in FIG. After that, as shown in FIG. 6B, the engagement protrusion 32 moves to a position where it abuts against the right edge 33 b of the opening 33, and engages with the guide groove 99 of the second cassette 91. Therefore, as shown in FIGS. 24 and 25, the inserted second cassette 91 is
It is placed at a predetermined position on the placing table 2.

Next, when the second cassette 91 is inserted in the wrong direction, that is, when the front and rear sides or the front and back of the second cassette 91 are mistakenly inserted, as shown in FIG. The engaging protrusion 32, which is biased to the position where it abuts against 33 a, is provided on the back surface 91 b of the second cassette 91.
(Or the cassette lid 92). Then, the engagement protrusion 32 is rotated in the B ₂ direction by the pressing force when it is pressed by the second cassette 91. However, since the second cassette 91 is inserted in the wrong direction, the opening 3
Even if it moves to a position where it abuts on the right side edge 33 b of No. 3, the engaging protrusion 32 cannot engage with the guide groove 99. That is, the engaging protrusion 3 of the cassette erroneous insertion prevention member 30.
2 is the back surface 9 of the second cassette 91 even if it is rotated in the B ₂ direction.
1b (or cassette lid 92) is contacted. Therefore,
Since the second cassette 91 is not mounted on the mounting table 2, it is prevented that the second cassette 91 is inserted in the wrong direction, that is, the front and back or the front and the back are mistakenly inserted.

Similarly, even when the first cassette 81 is inserted in the wrong direction, the engaging protrusion 32 is not inserted into the first cassette 81.
It contacts the back surface 81b or the cassette lid 82. That is, the engagement protrusion 32 of the cassette erroneous insertion prevention member 30 is
Back of the B ₁ -B ₂ also rotates in the direction the first cassette 81 8
1b or the cassette cover 82. Therefore, since the first cassette 81 is not placed on the placing table 2, it is prevented that the first cassette 81 is inserted in the wrong direction, that is, the front and back or the front and back are mistakenly inserted.

As described above, the cassettes 81 and 91 are inserted in the wrong direction in the slider 1'of this video tape recorder, that is, the front and back or front and back of the cassettes 81 and 91 are inserted incorrectly. A cassette erroneous insertion prevention member 30 for preventing the erroneous insertion is provided, and the cassette erroneous insertion prevention member 30 is provided in the guide groove 89 of the cassette 81/91.
-It has the engaging projection part 32 which engages with 99. The engaging protrusion 32 is provided in the width direction of the cassette 81/91 inserted in the video tape recorder, that is, B ₁
It is provided so as to be rotatable in the -B ₂ direction.

As a result, when the cassette 81/91 is inserted in the correct direction with respect to the video tape recorder, the engaging projection 32 can be engaged with any of the guide grooves 89/99. 81.91 can be inserted into a video tape recorder. On the other hand, when the cassette 81/91 is inserted into the video tape recorder in the wrong direction, that is, when the cassette 81/91 is inserted in the front / rear direction or the front / back sides by mistake, the engaging protrusion 32 is in the B ₁ -B ₂ direction. Guide grooves 89/99 even when rotated to
Cannot be engaged with and contacts the cassettes 81 and 91. Therefore, the cassette 81/91 cannot be inserted into the video tape recorder. Therefore, the guide groove 89.9
When using cassettes 81 and 91 formed at different positions depending on the characteristics of the recording tape, different types of cassettes 81 and 91 can be used in the video tape recorder, and the cassettes 81 and 91 are in the wrong direction. It is possible to add a function of preventing the cassette 81, 91 from being inserted in the front and rear or the front and back sides by mistake.

The positions where the guide grooves 89 and 99 of the cassettes 81 and 91 in the first and second embodiments are not limited to the above positions, of course, and the cassette 81 for the video tape recorder is not limited thereto. It suffices if it is formed at a position where the insertion direction of 91 can be regulated.

[0072]

As described above, in the recording / reproducing apparatus according to the first aspect of the present invention, the transfer means is provided with the erroneous insertion preventing member for preventing the cassette from being inserted in an erroneous direction. The erroneous insertion prevention member has at least two protrusions that engage with a groove formed in the cassette, and these protrusions have an advanced position at which they can engage with the groove and a retreat that releases the engagement with the groove. It is movably provided at a position, and when one protrusion is advanced to the advance position, the remaining protrusion is retracted to the retracted position.

Thus, when the cassette is inserted in the correct direction with respect to the apparatus, one of the protrusions of the erroneous insertion preventing member that is advanced to the advanced position is engaged with the groove formed in the cassette. Further, at this time, the remaining protrusions are retracted to the retracted position, so that they do not contact the cassette. Therefore, the cassette can be inserted into the device. On the other hand, when the cassette is inserted in the wrong direction with respect to the device, that is, when the front and rear or front and back of the cassette are mistakenly inserted, the protrusion protruding to the advance position can engage with the groove formed in the cassette. Instead, it contacts the cassette. Therefore,
The cassette cannot be inserted into the device. Therefore, when using a cassette in which the groove that regulates the insertion direction into the device is formed at a different position depending on the characteristics of the recording medium, different types of cassettes can be used in the recording / reproducing device, and those cassettes may be erroneous. It is possible to provide the function of preventing the cassette from being inserted in the opposite direction, that is, the function of preventing the front and back of the cassette or the front and back sides from being mistakenly inserted.

The recording / reproducing apparatus according to claim 2 of the present invention is
As described above, the transfer means is provided with the erroneous insertion prevention member for preventing the cassette from being inserted in the wrong direction,
The erroneous insertion prevention member has at least two protrusions that engage with a groove formed in the cassette, and these protrusions release the engagement position with the groove and the engagement with the groove. When the protrusion is movably provided at the retracted position and one of the protrusions advances to the advance position, the remaining protrusions move to the retracted position, and at least one of the protrusions is on the advance position side. It is a structure that is urged by.

Thus, the same effect as that of the recording / reproducing apparatus according to the first aspect can be obtained, and it is more certain that the cassette is inserted in the wrong direction, that is, the front and rear or front and back of the cassette are inserted incorrectly. It also has the effect of enabling prevention.

The recording / reproducing apparatus according to claim 3 of the present invention is
As described above, the transfer means is provided with the cassette erroneous insertion prevention member for preventing the cassette from being inserted in the wrong direction, and the cassette erroneous insertion prevention member engages with the groove formed in the cassette. It has a protrusion, and the protrusion is provided so as to be movable substantially in the width direction of the cassette inserted into the apparatus.

Thus, when the cassette is inserted into the device in the correct direction, the protrusion of the cassette misinsertion preventing member is engaged with the groove formed in the cassette by moving in the substantially width direction of the cassette. Therefore, the cassette can be inserted into the device. On the other hand, when the cassette is inserted in the wrong direction with respect to the device, that is, when the cassette is inserted in the front or rear or the front and back sides by mistake, the protrusions are not aligned with the grooves formed in the cassette even if they are moved in the width direction of the cassette. Unable to engage and abut the cassette. Therefore, the cassette cannot be inserted into the device. Therefore, when using a cassette in which the groove that regulates the insertion direction into the device is formed at a different position depending on the characteristics of the recording medium, it is possible to use different types of cassettes in the recording / reproducing device.
Moreover, there is an effect that it is possible to add a function of preventing the cassettes from being inserted in the wrong direction, that is, preventing the front and back of the cassette or the front and back sides from being inserted by mistake.

The recording / reproducing apparatus according to claim 4 of the present invention is
As described above, the transfer means is provided with the cassette erroneous insertion prevention member for preventing the cassette from being inserted in the wrong direction, and the cassette erroneous insertion prevention member engages with the groove formed in the cassette. The projection is provided so as to be movable substantially in the width direction of the cassette inserted into the apparatus, and is biased in the direction opposite to the insertion direction of the cassette.

Thus, the same effect as that of the recording / reproducing apparatus according to the third aspect can be obtained, and the protrusion can be formed substantially in the width direction of the cassette inserted in the apparatus without using any special means for moving the protrusion. The effect that the parts can be moved is also obtained.

A recording / reproducing apparatus according to a fifth aspect of the present invention comprises:
As described above, the transfer means is provided with the cassette erroneous insertion prevention member for preventing the cassette from being inserted in the wrong direction, and the cassette erroneous insertion prevention member engages with the groove formed in the cassette. The projection is provided so as to be movable substantially in the width direction of the cassette inserted in the apparatus, and is engaged with the groove at both ends of its movable range.

Thus, the same effect as that of the recording / reproducing apparatus according to the third aspect is obtained, and when the cassette is inserted in the correct direction with respect to the apparatus, the projection is more securely engaged with the groove formed in the cassette. The effect that it becomes possible to combine is also exhibited.

The recording / reproducing apparatus according to claim 6 of the present invention is
As described above, the transfer means is provided with the prevention member that prevents the cassette from being inserted in the wrong direction, and the prevention member has the engagement portion that engages with the groove formed in the cassette. The engaging portion is movably provided at an engaging position capable of engaging with the groove and a releasing position for releasing the engagement with the groove, and the engaging portion is pressed by the inserted cassette. It is a configuration for moving between the combined position and the release position.

Thus, there is an effect that the engaging portion can be moved between the engaging position and the releasing position without using any special means for moving the engaging portion.

A recording / reproducing apparatus according to a seventh aspect of the present invention is
As described above, the transfer means has a mounting table on which the cassette is mounted, and the mounting table is provided with a prevention member for preventing the cassette from being inserted in the wrong direction. The cassette has an engaging portion that engages with a groove formed in the cassette, and the engaging portion is movable to an engaging position capable of engaging with the groove and a releasing position for releasing the engagement with the groove. This is the configuration provided.

As a result, since the prevention member is provided on the mounting table on which the cassette is mounted, it is possible to save a small space.
It is possible to provide the function of preventing the cassette from being inserted in the wrong direction, that is, the function of preventing the cassette from being inserted in the front or rear or the front and back.

[Brief description of drawings]

FIG. 1 is a plan view of a slider of a video tape recorder as a recording / reproducing device according to a first embodiment of the present invention.

FIG. 2 is a front view of the slider.

FIG. 3 is a plan view of an erroneous insertion prevention member attached to the mounting table of the slider.

FIG. 4 is a sectional view taken along the line C-C in FIG.

FIG. 5 is a front view of the erroneous insertion prevention member, FIG. 5A shows a state in which the engagement protrusion is advanced to an advance position where it can be engaged with the guide groove of the first cassette, and FIG. The state where the engaging protrusion is advanced to the advanced position where it can be engaged with the guide groove of the second cassette is shown.

FIG. 6 is a rear view of a first cassette used in the video tape recorder.

FIG. 7 is a front view of the first cassette.

FIG. 8 is a side view of the first cassette.

FIG. 9 is a rear view of a second cassette used in the video tape recorder.

FIG. 10 is a front view of the second cassette.

FIG. 11 is a plan view showing how the erroneous insertion prevention member engages with the guide groove of the first cassette.

FIG. 12 is a front view showing how the erroneous insertion prevention member engages with the guide groove of the first cassette.

FIG. 13 is a plan view showing a state in which the erroneous insertion prevention member is engaged with the guide groove of the first cassette.

FIG. 14 is a plan view showing how the erroneous insertion prevention member engages with the guide groove of the first cassette.

FIG. 15 is a front view showing how the erroneous insertion prevention member engages with the guide groove of the first cassette.

FIG. 16 is a side view showing how the erroneous insertion prevention member engages with the guide groove of the first cassette.

FIG. 17 is a plan view showing a state in which the erroneous insertion prevention member prevents the first cassette from being inserted in the wrong direction.

FIG. 18 is a front view showing a state in which the erroneous insertion prevention member prevents the first cassette from being inserted in the wrong direction.

FIG. 19 is a plan view of a slider of a video tape recorder as a recording / reproducing device according to a second embodiment of the present invention.

FIG. 20 is a front view of the slider.

FIG. 21 is a plan view showing a state in which the cassette erroneous insertion prevention member attached to the mounting table of the slider is engaged with the guide groove of the first cassette.

FIG. 22 is a plan view showing a state where the cassette erroneous insertion prevention member is engaged with the guide groove of the first cassette.

FIG. 23 is a front view of the main part of the slider, FIG.
Shows a state in which the engaging protrusion is moving in the clockwise direction, and (b) shows a state in which the engaging protrusion has finished moving in the clockwise direction.

FIG. 24 is a plan view showing a state in which the cassette erroneous insertion prevention member attached to the mounting table of the slider is engaged with the guide groove of the second cassette.

FIG. 25 is a plan view showing a state in which the cassette erroneous insertion prevention member is engaged with the guide groove of the second cassette.

FIG. 26 is a plan view showing a state where the cassette erroneous insertion prevention member prevents the second cassette from being inserted in the wrong direction.

FIG. 27 is a plan view of a slider of a conventional video tape recorder.

FIG. 28 is a front view of the conventional slider.

FIG. 29 is a plan view showing a state in which an erroneous insertion prevention protrusion attached to the mounting table of the conventional slider prevents the cassette from being inserted in the wrong direction.

FIG. 30 is a front view showing a state in which the erroneous insertion prevention protrusion prevents the cassette from being inserted in the wrong direction.

[Explanation of symbols]

1 Slider (Transfer Means) 1'Slider (Transfer Means) 2 Mounting Table 2e Opening 2f Opening 10 Misinsertion Preventing Member (Erroneous Insertion Preventing Member, Preventing Member) 15a Engagement Protrusion (Protrusion, Engagement) 15b Engagement protrusion (projection, engagement part) 30 Cassette misinsertion prevention member (cassette misinsertion prevention member, prevention member) 32 Engagement projection (projection, engagement part) 33 Opening 81 First cassette (cassette ) 89 guide groove (groove) 91 second cassette (cassette) 99 guide groove (groove)

Claims (7)

[Claims] 1. When recording / reproducing information to / from the recording medium, a cassette is used which has a recording medium built-in and a groove for regulating an inserting direction into an apparatus is formed at a different position depending on characteristics of the recording medium. A recording / reproducing apparatus comprising a transfer means for transferring a cassette inserted in the apparatus to a predetermined position in the apparatus, wherein the transfer means is erroneously inserted to prevent the cassette from being inserted in the wrong direction. A prevention member is provided, and the erroneous insertion prevention member has at least two protrusions that engage with the grooves formed in the cassette, and these protrusions have an advanced position where the protrusions can be engaged with the groove and a groove. A recording / reproducing apparatus, which is movably provided at a retracted position for releasing the engagement with and is arranged such that when one protrusion advances to an advanced position, the remaining protrusions retract to the retracted position. 2. When recording / reproducing information on / from the recording medium, a cassette is used which has a recording medium built-in and in which a groove for restricting an inserting direction into an apparatus is formed at a different position depending on characteristics of the recording medium. A recording / reproducing apparatus comprising a transfer means for transferring a cassette inserted in the apparatus to a predetermined position in the apparatus, wherein the transfer means is erroneously inserted to prevent the cassette from being inserted in the wrong direction. A prevention member is provided, and the erroneous insertion prevention member has at least two protrusions that engage with the grooves formed in the cassette, and these protrusions have an advanced position where the protrusions can be engaged with the groove and a groove. It is provided movably at the retracted position for releasing the engagement with, and when one protrusion advances to the advanced position, the remaining protrusions retract to the retracted position, and at least one of the above protrusions. 1
One is a recording / reproducing apparatus characterized in that it is urged toward the advance position side. 3. When recording / reproducing information to / from the recording medium using a cassette having a recording medium built-in, and a groove for regulating an inserting direction into an apparatus is formed at a different position depending on a characteristic of the recording medium. A recording / reproducing apparatus having a transfer means for transferring a cassette inserted in the apparatus to a predetermined position in the apparatus, wherein the transfer means prevents the cassette from being inserted in the wrong direction. An insertion prevention member is provided, and the cassette erroneous insertion prevention member has a protrusion that engages with a groove formed in the cassette, and the protrusion is movable in substantially the width direction of the cassette inserted in the device. A recording / reproducing apparatus, which is provided. 4. When recording / reproducing information to / from the recording medium, a cassette is used which has a recording medium built-in and in which a groove for regulating an inserting direction into an apparatus is formed at a different position depending on a characteristic of the recording medium. A recording / reproducing apparatus having a transfer means for transferring a cassette inserted in the apparatus to a predetermined position in the apparatus, wherein the transfer means prevents the cassette from being inserted in the wrong direction. An insertion prevention member is provided, and the cassette erroneous insertion prevention member has a protrusion that engages with a groove formed in the cassette, and the protrusion is movable in substantially the width direction of the cassette inserted in the device. A recording / reproducing apparatus, wherein the recording / reproducing apparatus is provided and is biased in a direction opposite to the insertion direction of the cassette. 5. When recording / reproducing information to / from the recording medium, a cassette is used which has a recording medium built-in and in which a groove for regulating an inserting direction into an apparatus is formed at a different position depending on a characteristic of the recording medium. A recording / reproducing apparatus having a transfer means for transferring a cassette inserted in the apparatus to a predetermined position in the apparatus, wherein the transfer means prevents the cassette from being inserted in the wrong direction. An insertion prevention member is provided, and the cassette erroneous insertion prevention member has a protrusion that engages with a groove formed in the cassette, and the protrusion is movable in substantially the width direction of the cassette inserted in the device. A recording / reproducing apparatus, which is provided and engages with the groove at both ends of its movable range. 6. When recording / reproducing information on / from a recording medium using a cassette in which a groove for regulating the insertion direction into the apparatus is formed at a position different depending on the characteristics of the recording medium. A recording / reproducing apparatus comprising a transfer means for transferring a cassette inserted in the apparatus to a predetermined position in the apparatus, wherein the transfer means prevents the cassette from being inserted in an incorrect direction. And the prevention member has an engagement portion that engages with a groove formed in the cassette, and the engagement portion has an engagement position at which the groove can be engaged and engagement with the groove. A recording / reproducing apparatus, which is movably provided at a releasing position for releasing, and moves between the engaging position and the releasing position by being pressed by the inserted cassette. 7. When recording / reproducing information on / from the recording medium, a cassette is used which has a recording medium built therein and in which a groove for restricting an inserting direction into the apparatus is formed at a different position depending on the characteristics of the recording medium. A recording / reproducing apparatus having a transfer means for transferring a cassette inserted in the apparatus to a predetermined position in the apparatus, wherein the transfer means has a mounting table on which the cassette is mounted. , A preventing member for preventing the cassette from being inserted in the wrong direction is provided, and the preventing member has an engaging portion that engages with a groove formed in the cassette, and the engaging portion is the groove. A recording / reproducing apparatus, which is movably provided at an engagement position at which the groove can be engaged with and a release position at which the engagement with the groove is released.