JPH04360054A - Magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To prevent damage by an erroneous insertion and to obtain a device with high reliability by loading a standard cassette by operating an engagement lever and a loading lever when the standard cassette is inserted and placing these parts on the positions which are not engaged with a small-sized cassette. CONSTITUTION:When a standard tape cassette 200 is inserted, an engagement part 20a of a left engagement lever 20 is engaged with a cassette 200 and the engagement lever 20 rotates. By this rotation, a rotation control part 20b and a part to be rotated and controlled 30a of a left loading lever 30 are distanced, the loading lever 30 rotates, a part to be restrained part 30b of the lever 30 moves to the position which is not engaged with a stopper 150a and a cassette holder 140 is loaded by a motor sliding by being guided to a guide groove 152 integrally with the cassette 200. The right side operates in the same way as the left side. When a small-sized cassette 210 is inserted, a cassette 210 is not engaged with the engagement lever 20, etc., and the holder 140 is loaded by being guided by the guide groove 152.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic recording and reproducing apparatus, and more particularly to a mechanism for preventing incorrect insertion of a tape cassette when the tape cassette is loaded into the apparatus.

0002

2. Description of the Related Art In recent years, video tape recorders of various formats have been released by various companies, and their popularity has been increasing year by year. By the way, tape cassettes compatible with various formats and tape cassettes of different sizes even for the same format are on the market, and users need to be careful in terms of compatibility.

An example of a conventional magnetic recording/reproducing device will be described below with reference to the drawings. 7 is a plan view of a conventional magnetic recording/reproducing device, FIG. 8 is a right side view of FIG. 7, and FIG. 9 is a diagram showing a state in which a standard tape cassette is inserted into the device.
FIG. 10 is a sectional view taken along line CC in FIG. 7, and FIG. 10 is a sectional view taken along line DD in FIG.

[0004] In FIGS. 7 and 8, a device main body 100 is composed of a chassis 101 and a front block 102 on the front surface of the chassis 101. As shown in FIG. The front block 102 includes
A cassette insertion port 111 is provided, through which a standard tape cassette 200 and a small tape cassette 210 smaller than the standard tape cassette 200 can be inserted and ejected. Further, a cassette holder 140 supported by a side plate (not shown) arranged approximately perpendicular to the chassis 101 is provided, and a standard tape cassette 2 inserted from the cassette insertion slot 111 is provided.
00 or a small tape cassette 210 can be held. The cassette holder 140 includes a standard cassette left guide part 147a that guides the standard tape cassette 200 in the directions of arrows x and x' in FIG. A small tape cassette 21 is placed at a position a predetermined amount h0 away from the lower guide portion 143 in the direction of the arrow z in FIG.
It has a small cassette lower guide part 144 that guides the lower part of the cassette. The cassette holder 140 also has a small tape cassette 210 guided to a small cassette lower guide part 144,
Additionally, a small cassette left guide section 145 and a small cassette right guide section 146 are provided which are positioned within the cassette holder 140 in the directions of arrows x and x'.

The operation of the magnetic recording/reproducing apparatus constructed as described above will be explained below with reference to FIGS. 7 to 10. When the standard tape cassette 200 is inserted from the cassette holder 140 in FIG. 8, the standard tape cassette 200 is inserted into the cassette holder 140 as shown in FIG.
The cassette is guided by the standard cassette left guide part 147a, the standard cassette right guide part 147b, and the standard cassette bottom guide part 143, and is installed in the cassette holder 140. On the other hand, when the small tape cassette 210 is inserted into the cassette holder 140 from the cassette insertion opening 111 in FIG.
Small cassette left guide part 145 of cassette holder 140,
The small cassette is guided by the small cassette right guide section 146 and the small cassette bottom guide section 144 and installed in the cassette holder 140.

[0006]

However, the above configuration has the following problems. That is, when a user inserts a standard tape cassette or a small tape cassette from the cassette insertion slot with a concentrated load of F0 or F1 in FIG. There is a possibility that it may not be possible to store it in the specified position inside. Therefore, if the cassette holder moves while holding a standard tape cassette or small tape cassette that is in an incorrect position relative to the cassette holder, the standard tape cassette or small tape cassette will not be installed in the correct position relative to the chassis. This may damage the parts installed in the chassis or the standard tape cassette or small tape cassette.

In view of the above-mentioned problems, the present invention prevents damage to parts on the chassis or standard tape cassettes or small tape cassettes due to irregularly inserted standard tape cassettes or small tape cassettes, thereby improving safety and reliability. The present invention provides a magnetic recording/reproducing device with high performance.

[0008]

Means for Solving the Problems In order to solve the above problems, a magnetic recording and reproducing apparatus according to the invention as set forth in claim 1 holds a standard tape cassette inserted from a cassette insertion slot at a first predetermined position, and a holding means for substantially positioning and holding a small tape cassette smaller than a standard tape cassette inserted from the cassette insertion slot at a second predetermined position;
moving means for reciprocating the holding means between a first position where a standard tape cassette or a small tape cassette is inserted and a second position where the standard tape cassette or small tape cassette is mounted on the tape drive means; a detection means for detecting insertion of a standard tape cassette; and a locking portion for preventing movement of the holding means from the first position to the second position when the detection means detects the standard tape cassette; and a locking means that releases the locking portion from preventing movement of the holding means from the first position to the second position when the standard tape cassette is inserted to the first predetermined position of the holding means, The detection means is provided at a position where the small tape cassette is not detected by the detection means when the small tape cassette is inserted into the second predetermined position of the holding means from the cassette insertion opening.

[0009]

[Operation] By adopting the above structure, the present invention detects that the standard tape cassette is inserted from the cassette insertion opening by the detection means, and when the standard tape cassette is inserted to the first predetermined position of the holding means. , releasing the movement of the holding means by the locking means. Moreover, the small tape cassette can be inserted into the holding means to the second predetermined position without being detected by the detection means.

0010

DESCRIPTION OF THE PREFERRED EMBODIMENTS A magnetic recording/reproducing apparatus according to an embodiment of the present invention will be described below with reference to the drawings. 1 is a front view of a magnetic recording and reproducing apparatus according to a first embodiment of the present invention, FIG. 2 is a plan view of FIG. 1, FIG. 3 is a view taken in the direction of arrow A in FIG. 1, and FIGS. 4 and 5 are standard tape cassettes. FIG. 1 is a view taken along arrow A in FIG. 1 showing the operation of inserting the small tape cassette into the holding means, and FIG. 6 is a view taken along arrow A in FIG. 1 showing a state in which the small tape cassette is inserted into the holding means. Figure 1
As shown in FIG.
1 and a front block 102 on the front side of the main body 100 of the apparatus. The front block 102 is provided with a cassette insertion opening 111 into which a standard tape cassette 200 and a small tape cassette 210 can be inserted and ejected. Furthermore, magnetic tapes (not shown) in the standard tape cassette 200 and the small tape cassette 210 are mounted on the chassis 101.
A tape drive means 103 is provided for driving the tape.

A cassette holder 140 is movably provided between side plates 150 and 151 that are arranged approximately vertically on the left and right sides of the chassis 101. Cassette holder 1
40 indicates the arrows x, x in FIG. 2 of the standard tape cassette 200.
A small cassette is located at a predetermined distance h0 in the direction of arrow z in FIG. It has a small cassette lower guide part 144 that guides the tape cassette 210 downward. As shown in FIGS. 2 and 3, guide portions 141a and 142a are formed on the side surfaces of the left cassette guide 141 and the right cassette guide 142, and are slidable in guide grooves 152 and 153 provided in side plates 150 and 151. is engaged in. In addition, the small tape cassette 210 is placed in the small cassette lower guide portion 1 in the cassette holder 140.
A small cassette left guide section 1 that guides the cassette to the cassette 44 and regulates the directions of arrows x and x' within the cassette holder 140.
45 and a small cassette right guide section 146 are provided. Furthermore, the cassette holder 140 has a small cassette front regulating section 148 and a small cassette rear regulating section 149 that regulate the directions of arrows y and y'. Therefore, the small tape cassette 210 inserted from the cassette insertion slot 111 is
In FIG. 2, it is positioned approximately at predetermined positions in the directions of the arrows x, x' and the directions of the arrows y, y' so that it can be mounted. Here, as shown in FIG. 3, the heights of the small cassette front regulating part 148 and the small cassette rear regulating part 149 from the small cassette lower guide part 144 are such that h1<h0 is satisfied with respect to the above-mentioned predetermined amount h0. It is set to quantitative h1,
The standard tape cassette 200 inserted through the cassette insertion port 111 is designed not to interfere with the operation of inserting it into the cassette holder 140.

A left wiper arm 10 and a right wiper arm 11 are fixed in substantially the same phase to both ends of a wiper arm synchronizing shaft 12 which is rotatably provided with respect to side plates 150 and 151. A gear portion 10 that transmits the driving force of a motor (not shown) is provided on the outer periphery of the
A is provided. Furthermore, guide portions 14 of a left cassette guide 141 and a right cassette guide 142 are provided at the tips of the left wiper arm 10 and the right wiper arm 11, respectively.
Holder drive parts 10b, 11b that engage with 1a, 142a
is formed. Therefore, the cassette holder 140 is moved to the side plate 150 by the driving force of a motor (not shown).
, 151 so that it can slide while being guided by guide grooves 152, 153. Although not shown, a compression spring is provided that applies a predetermined biasing force to the left wiper arm 10 and the right wiper arm 11 in a counterclockwise direction in FIG.
1b, left cassette guide 141, right cassette guide 1
A biasing force in the direction of arrow x' in FIG. 3 is applied to the cassette holder 140 via 42.

As shown in FIG. 3, the left cassette guide 14
A left engagement lever 20 is provided so as to be rotatable around a left engagement lever shaft 22 erected on the left engagement lever shaft 22, and is biased clockwise around the left engagement lever shaft 22 by a left engagement lever spring 23. The left engagement lever 20 is a first cassette engagement portion 2 that engages with a standard tape cassette 200 inserted from the cassette insertion port 111.
It has a rotation regulating part 20b that can come into contact with the rotation regulating part 30a of the left mounting lever 30, which is rotatably provided around the left mounting lever shaft 32 installed on the left mounting lever 0a and the left cassette guide 141. The left mounting lever 30 mainly has a rotation regulating portion 30a.
, a stopper 150a provided on the top of the side plate 150
The locked portion 30b that can be engaged with the cassette insertion port 11
It is composed of a second cassette engaging portion 30c that engages with the standard tape cassette 200 inserted from 1, and is biased clockwise around the left mounting lever shaft 32 by a left mounting lever spring 33.

By the way, as shown in FIG. 3, when no external force is applied to the first cassette engaging portion 20a of the left engaging lever 20, the left mounting lever 30
A counterclockwise moment (hereinafter abbreviated as "first moment") around the left mounting lever shaft 32 due to the biasing force of the left engagement lever spring 23 is generated via the rotation regulating portion 20b of 0. A clockwise moment around the mounting lever shaft 32 (hereinafter abbreviated as second moment) is simultaneously received. Here, since the first moment is set larger than the second moment, the left mounting lever 30 applies a moment corresponding to the difference between the first moment and the second moment to the rotation regulating portion of the left engagement lever 20.
0b, the rotational phase shown in FIG. 3 is taken, and the locked portion 30b takes a position where it does not engage with the stopper 150a.

Furthermore, as shown in FIG. 4, the left engagement lever 2
0 rotates around the left engagement lever shaft 22, and when no external force is applied to the left mounting lever 30 from any source other than the left engagement lever 20, the left mounting lever 30 is rotated by the rotation regulating portion of the left engagement lever 20. 20b, it receives only the second moment and rotates around the left attachment lever shaft 32 in a clockwise direction. This rotation causes the left mounting lever 30 to lock its locked portion 3.
0b is moved to a position where it can be locked by a stopper 150a.

Furthermore, as shown in FIG. 5, the left engagement lever 20 rotates around the left engagement lever shaft 22, and the left mounting lever 30 rotates around the left mounting lever shaft 32 from a position other than the left engagement lever 20. When receiving a counterclockwise rotational moment,
The left mounting lever 30 can rotate against the urging force of the left mounting lever spring 33. Due to this rotation, the left mounting lever 30 assumes a position where its locked portion 30b does not engage with the stopper 150a.

Note that the right engaging lever 40 is located at a position approximately symmetrical to the left engaging lever 20, left engaging lever spring 23, left mounting lever 30, left mounting lever spring 33, and stopper 150a with respect to the straight line L1 in FIG. , right engagement lever spring 43,
A right mounting lever 50, a right mounting lever spring 53, and a stopper 151a are provided. The right engagement lever 40 is rotatably supported around a right engagement lever shaft 42 mounted on a right cassette guide 142. Further, like the left engagement lever 20, the right engagement lever 40 includes a first cassette engagement part 40a and a rotation restriction part 40b. The rotation regulating portion 40b is capable of engaging with the standard tape cassette 200, and the rotation regulating portion 40b is connected to the right mounting lever 50, which is rotatably provided around the right mounting lever shaft 52 installed in the right cassette guide 142.
The rotation regulating portion 50a can come into contact with the rotation regulating portion 50a. Furthermore, like the left mounting lever 30, the right mounting lever 50 includes a rotation regulating portion 50a, a locked portion 50b, and a second cassette engaging portion 50c. The second cassette engaging portion 50c is adapted to engage with a standard tape cassette 200 inserted through the cassette insertion opening 111. The right engagement lever 40 and the right attachment lever 50 are approximately symmetrical to the left engagement lever 20 and the left attachment lever 30, respectively, with respect to the straight line L1. In addition, the biasing forces that the right engagement lever spring 43 and the right mounting lever spring 53 apply to the right engagement lever 40 and the right mounting lever 50, respectively, are
3 are set to be approximately the same as those applied to the left engagement lever 20 and the left mounting lever 30, respectively, and the direction of action thereof is the same with respect to the straight line L2 in FIG. moreover,
Right engagement lever 40, right mounting lever 50, and stopper 1
The relative positional relationship and engagement relationship of 51a are substantially the same as those of the left engagement lever 20, left mounting lever 30, and stopper 150a.

Therefore, when both the left mounting lever 30 and the right mounting lever 50 are in the rotational phase shown in FIG. 3 or FIG.
, 151 and can slide while being guided by guide grooves 152, 153. On the other hand, when only one of the left mounting lever 30 and the right mounting lever 50 is in the rotational phase shown in FIG.
Sliding guided by guide grooves 152 and 153 is not possible on one side of a.

By the way, as shown in FIG. 2, the first cassette engaging portion 20 of the left engaging lever 20 and the right engaging lever 40
a and 40a are provided at positions where they do not engage when the small tape cassette 210 is mounted on the cassette holder 140. Therefore, the first cassette engaging portions 20a and 40a
can only be engaged with the standard tape cassette 200.

Further, the standard cassette lower regulating part 111a provided in the cassette insertion slot 111 is set at approximately the same height as the standard cassette lower guide part 143 of the cassette holder 140, so that the standard tape cassette 200 can be inserted into the cassette insertion slot 111.
When inserting the cassette further, the small cassette rear restriction section 149 prevents the insertion from being obstructed.

The operation of the magnetic recording/reproducing apparatus constructed as described above will be explained below with reference to FIGS. 1 to 6. First, the operation of mounting the standard tape cassette 200 onto the cassette holder 140 will be described. As shown in FIG. 3, the small cassette rear regulating part 1 of the cassette holder 140
49 is set lower than the standard cassette lower regulation part 111a and the standard cassette lower guide part 143. Therefore, the standard tape cassette 200 inserted through the cassette insertion port 111 can start being inserted into the cassette holder 140 without any hindrance. On the other hand, left engagement lever 2
As shown in FIG. 3, the zero and right engagement levers 40 are in an initial phase in which their respective first cassette engagement portions 20a, 40a can engage with the standard tape cassette 200. Therefore, the left mounting lever 30 receives a moment corresponding to the difference between the first moment and the second moment from the rotation regulating portion 20b of the left engagement lever 20, and comes into contact with the left engagement lever 20 and remains stationary. Similarly to the left mounting lever 30, the right mounting lever 50, which is approximately symmetrical to the left mounting lever 30 with respect to the straight line L1, corresponds to the difference between the first moment and the second moment from the rotation regulating portion 40b of the right engagement lever 40. It receives a moment and comes into contact with the right engagement lever 40 and remains stationary.

In FIG. 3, a standard tape cassette 200
When inserted in the direction of the arrow x, the state shown in FIG. 4 is obtained. That is, the first cassette engaging portions 20a and 40a of the left engaging lever 20 and the right engaging lever 40 are the standard type tape cassette 20.
0. Due to the insertion force of the standard tape cassette 200, the left engagement lever 20 receives a counterclockwise moment around the left engagement lever shaft 22, and rotates against the biasing force of the left engagement lever spring 23. Due to this rotation of the left engagement lever 20, the rotation restriction portion 20b of the left engagement lever 20 and the rotation restriction portion 30a of the left mounting lever 30 are separated. Therefore, the left mounting lever 30 receives only the second moment from the left mounting lever spring 33 and rotates clockwise around the left mounting lever shaft 32. Then, the locked portion 30b of the left mounting lever 30
moves to a position where it can be locked by the stopper 150a. In addition, similar to the left engagement lever 20, the right engagement lever 40 is also inserted into the right engagement lever shaft 4 due to the insertion force of the standard tape cassette 200.
It rotates twice and rotates to approximately the same phase as the left engagement lever 20. Therefore, the right mounting lever 50 also rotates to approximately the same phase as the left mounting lever 30, and moves to a position where it can be locked by the stopper 151a.

In FIG. 4, a standard tape cassette 200
When the tape cassette 200 is further inserted in the direction of the arrow x, the standard tape cassette 200 engages with the second cassette engaging portions 30c and 50c of the left mounting lever 30 and the right mounting lever 50. Due to the insertion force of the standard tape cassette 200, the left mounting lever 30 receives a counterclockwise rotational moment around the left mounting lever shaft 32, and rotates against the biasing force of the left mounting lever spring 33. Similarly, the right mounting lever 50 also rotates to approximately the same phase as the left mounting lever 30. Therefore, the locked portions 30b and 50b of the left mounting lever 30 and the right mounting lever 50 move to positions where they do not engage with the stoppers 150a and 151a, respectively. By inserting the standard tape cassette 200 to the position shown in FIG.
, 151, and can be slid on the tape drive means 103 by the driving force of a motor (not shown).

On the other hand, the standard tape cassette 200 is shown in FIG.
A case will be described in which the cassette is inserted from the cassette insertion opening 111 in a direction inclined by θo with respect to the normal insertion direction, as shown by the two-dot chain line.

The standard tape cassette 200 inserted through the cassette insertion port 111 is engaged with the first cassette engagement portions 20a and 40a of the left engagement lever 20 and right engagement lever 40, as described above. Together, they rotate to the phase shown in FIG. Due to this rotation, the left mounting lever 30 and the right mounting lever 50 also release the engagement relationship with the left engagement lever 20 and the right engagement lever 40, respectively, and rotate to the phase shown in FIG. 4. Therefore, the locked portions 30b and 50b of the left mounting lever 30 and the right mounting lever 50 move to positions where they can engage with the stoppers 150a and 151a, respectively.

When the standard type tape cassette 200 is further inserted in the direction of arrow x, the second cassette engaging portion 30a of the left mounting lever 30 engages with the standard type tape cassette 200. Due to the insertion force of the standard tape cassette 200, the left mounting lever 30 receives a counterclockwise rotational moment around the left mounting lever shaft 32, and rotates against the biasing force of the left mounting lever spring 33. On the other hand, since the standard tape cassette 200 is inserted diagonally, no external force from the standard tape cassette 200 is applied to the second cassette engaging portion 50a. Therefore, the right engagement lever 40 and the right mounting lever 50 are stationary in the rotational phase shown in FIG. 4, and only the locked portion 50b of the right mounting lever 50 is in a position where it can be engaged with the stopper 151a. Even if an external force is applied to move the standard tape cassette 200 that is integrated with the cassette holder 140 in the direction of the arrow 14
0 will be prevented from moving.

On the other hand, the standard tape cassette 200 is shown in FIG.
When the cassette is inserted from the cassette insertion slot 111 in a direction inclined by -θo with respect to the normal insertion direction, the left mounting lever 30 stands still at the rotational phase shown in FIG. 4, while the right mounting lever 50 stands still at the rotational phase shown in FIG. It will come to rest at the rotational phase shown in . Therefore, only the locked portion 30b of the left mounting lever 30 is in a position where it can be engaged with the stopper 150a. Even if an external force is applied to move the standard tape cassette 200 integrated with the cassette holder 140 in the direction of arrow 140 will be prevented from moving.

Next, the operation of mounting the small tape cassette 210 onto the cassette holder 140 will be described.

The main body 100 of the apparatus is in the standby position shown in FIG. Here, when the small tape cassette 210 is inserted from the predetermined position of the cassette insertion slot 111, the small tape cassette 210 is regulated in the directions of arrows x and x' in FIG. The cassette is mounted in the cassette holder 140 while being regulated in the directions of arrows y and y' in FIG. 2 by the small cassette front regulating section 148 and the small cassette rear regulating section 149. Therefore, the small tape cassette 210 mounted at a predetermined position in the cassette holder 140 is inserted into the small cassette left guide section 145.
, the small cassette right guide part 146, the small cassette front regulating part 148, and the small cassette rear regulating part 149, so that it does not move relative to the cassette holder 140. Moreover, small tape cassette 21
0 from the cassette insertion slot 111 and mounted on the cassette holder 140, the small tape cassette 210 is in a position where it does not engage with the first cassette engaging portions 20a, 40a of the left engaging lever 20 and the right engaging lever 40. Therefore, each of the locked parts 30b and 50b is connected to the stopper 15.
It will not be locked at 0a or 151a. Therefore, the small tape cassette 210 is housed in a predetermined position in the cassette holder 140 and integrally moves into the guide grooves 152, 15 of the side plates 150, 151.
3. It can slide guided by a motor (not shown).
The driving force allows the tape to be attached to the tape drive means 103.

In this embodiment, the detection means corresponds to the left engagement lever 20 and the right engagement lever 40, but the detection means is not limited to mechanical means such as these levers. For example, a non-contact element consisting of a light emitting element and a light receiving element or a contact type element may be used, and even if these are used, exactly the same effect can be obtained.

[0031]

[Effects of the Invention] As described above, the present invention includes a detection means for detecting that a standard tape cassette is inserted from the cassette insertion slot, and a detection means that detects the standard tape cassette and moves the holding means to the first position. The locking portion prevents the holding device from moving from the first position to the second position, and when the standard tape cassette is inserted to the first predetermined position of the holding device, the holding portion moves the holding device to the first position. and a locking means for releasing the prevention of movement from the position to the second position,
By providing the detection means at a position where the small tape cassette is not detected by the detection means when the small tape cassette is inserted into the second predetermined position of the holding means from the cassette insertion opening, the structure is extremely simple and can be used as a standard for holding means. The relative position of the standard tape cassette or small tape cassette can be guaranteed, and even if the holding means moves, damage to equipment parts caused by the standard tape cassette or small tape cassette can be prevented, resulting in safety and reliability. We can provide high quality equipment. Further, since there is no need for a plurality of detection means each for detecting the insertion of a standard tape cassette or a small tape cassette, it is possible to provide a device with high cost performance, and its practical effects are great.

[Brief explanation of drawings]

FIG. 1 is a front view of a magnetic recording and reproducing device according to a first embodiment of the present invention.

[Figure 2] Plan view of Figure 1

[Figure 3] View from arrow A in Figure 1

[Fig. 4] View from arrow A in Fig. 1 showing the operation of inserting the standard tape cassette into the holding means.

[Fig. 5] View from arrow A in Fig. 1 showing the operation of inserting the standard tape cassette into the holding means.

[Fig. 6] View from arrow A in Fig. 1 showing the state in which the small tape cassette is inserted into the holding means.

[Fig. 7] Plan view of a conventional magnetic recording/reproducing device

[Figure 8] Figure 7
right side view of

[Fig. 9] Cross-sectional view taken along line C-C in Fig. 7 showing the standard tape cassette inserted into the device.

FIG. 10 is a sectional view taken along line DD in FIG. 7 showing the state in which the small tape cassette is inserted into the device.

[Explanation of symbols]

10 Left wiper arm 11 Right wiper arm 12 Wiper arm synchronization axis 20 Left engagement lever 22 Left engagement lever shaft 23 Left engagement lever spring 30 Left mounting lever 32 Left mounted lever shaft 33 Left-mounted lever spring 40 Right engagement lever 42 Right engagement lever shaft 43 Right engagement lever spring 50 Right mounting lever 52 Right-mounted lever shaft 53 Right-mounted lever spring 100　Device body 101 Chassis 102 Front block 103 Tape drive means 111 Cassette insertion slot 140 Cassette holder 141 Left cassette guide 142 Right cassette guide 149 Small cassette rear regulation section 150 Side plate 151 Side plate 200 Standard tape cassette 210 Small tape cassette

Claims (1)

[Claims] Claim 1: A standard type tape cassette inserted from the cassette insertion slot is held at a first predetermined position, and a small tape cassette smaller than the standard type tape cassette inserted from the cassette insertion slot is held at a second predetermined position. a holding means for substantially positioning and holding at a predetermined position; a first position for inserting the standard tape cassette or the small tape cassette; and a second position for mounting the standard tape cassette or the small tape cassette on a tape drive means. a moving means for reciprocating the holding means; a detecting means for detecting insertion of the standard tape cassette from the cassette insertion slot; comprising a locking portion that prevents the means from moving from the first position to the second position, and when the standard tape cassette is inserted to the first predetermined position of the holding means, and a locking means for releasing the prevention of movement of the holding means from the first position to the second position by the locking part, and the small tape cassette is inserted into the second position of the holding means from the cassette insertion opening. A magnetic recording and reproducing apparatus, wherein the detection means is provided at a position where the small tape cassette is not detected by the detection means when inserted at a predetermined position.