JP2572437B2 - Magnetic recording / reproducing device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic recording / reproducing apparatus for recording / reproducing an analog or digital signal such as an audio signal or a video signal.

[Conventional technology]

Conventionally, magnetic recording / reproducing apparatuses include a helical scan type magnetic recording / reproducing apparatus using a rotating head and a linear track type using only a fixed head. As a helical scan type magnetic recording / reproducing device, a VTR (video tape recorder) for recording / reproducing a video signal and an audio signal, a DAT (digital audio tape recorder) for recording / reproducing an audio signal, and the like are known. As a magnetic recording / reproducing apparatus, a tape recorder for recording / reproducing an audio signal is known.

The VTR records and reproduces a video signal on a magnetic tape in a diagonal direction by a rotating head provided on a cylinder, and a fixed head is provided so that a track (long the longitudinal direction of the magnetic tape) is provided at an upper end or a lower end of the magnetic tape. The recording and reproduction of the audio signal is performed by forming a linear track. In the DAT, a rotary head for recording and reproducing sound is provided in a cylinder, whereby a digitized sound signal is recorded in an oblique direction on a magnetic tape.

In these magnetic recording / reproducing devices, a magnetic tape housed in a cassette is used. In a helical scan type magnetic recording / reproducing apparatus, when this cassette is mounted, a magnetic tape is automatically pulled out of the cassette by a loading mechanism provided in the magnetic recording / reproducing apparatus and wound around a cylinder. A tape running path is formed. An example of such a magnetic recording / reproducing apparatus is disclosed in Jpn.
No. 415.

Further, in the magnetic recording / reproducing apparatus of the linear track type, when the magnetic tape is not pulled out from the cassette and the cassette is inserted and positioned at a predetermined position, the fixed linear track head is applied to the magnetic tape in the cassette. Touch

[Problems to be solved by the invention]

As described above, the magnetic recording / reproducing apparatus of the helical scan type and the magnetic recording / reproducing apparatus of the linear track type have a difference in whether or not a magnetic tape is pulled out from a head or a cassette to be used. ,
There are differences in the size and the interval between the two reel bases, so that these cassettes are also used in different magnetic recording and reproducing devices. In particular, even for recording and reproducing the same audio signal, the DAT and the tape recorder have completely different systems.Conventionally, the cassette for the helical scan system and the cassette for the linear track system are the same system. No consideration is given to the point at which it can be used.

SUMMARY OF THE INVENTION An object of the present invention is to provide a magnetic recording / reproducing apparatus capable of recording / reproducing both cassettes of different types.

[Means for solving the problem]

In order to achieve the above object, the present invention provides a helical scan type magnetic recording / reproducing apparatus for recording / reproducing using a first tape cassette for a helical scan type.
A first means for mounting the first tape cassette and a second tape cassette of a linear track type, a linear track head, and switching and setting the linear track head between a first position and a second position; And second means.

[Action]

When the first tape cassette for the helical scan system is mounted, the magnetic tape is pulled out from the first tape cassette and loaded into the cylinder device. At this time, the linear track head is moved by the second means. The magnetic tape is set at a first position which does not hinder the drawing of the magnetic tape from the first tape cassette. When the second tape cassette for the linear track system is mounted, the magnetic tape is not pulled out from the second tape cassette, and the linear track head is moved to the second position by the second means. Then, the magnetic tape abuts on the magnetic tape in the second tape cassette.

〔Example〕

 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

First, an embodiment of a magnetic recording / reproducing apparatus according to the present invention will be described with reference to FIGS.

FIG. 1 is a plan view showing a state before a tape mounting operation of a tape cassette for a helical scan system is started.
Is a cylinder device, 2 is a main chassis, 3 is a cylinder mounting base, 4 is a latch, 5 is a first exit guide roller, 6 is a second entrance guide roller, 7 is a second entrance guide roller arm, 8 Is a rotating shaft, 9 is an entrance side inclined guide roller, 10 is a second inclined guide, 11 is a first inclined guide, 12
Is a guide base, 13 is a magnetic tape, 14 is a sub-chassis,
15 is a loading ring, 16 is a connecting member, 17 is a first entrance guide roller, 18 is a rotating shaft, 19 is a first entrance guide roller arm, 20 is a second exit guide roller, and 21 is a second exit guide roller. A tape cassette for a helical scan system (hereinafter simply referred to as a tape cassette), 22 is an opening, 23 is an exit guide roller arm, 24 is a rotating shaft, 25 is an exit drawer guide, 26 is a rotation shaft, and 27 is a rotation shaft. Discharge side pull-out arm, 28 is a pinch roller, 29 is a rotating shaft, 30 is a pinch roller arm, 31 to 34 are guide shafts, 35 to
38 is a guide groove, 39 is a capstan, 40 is a linear track head, 41 is a rotating shaft, 42 is a linear track head arm,
43 to 45 are rollers, 46 to 48 are rotating shafts, 49 is a supply reel base,
50 is a take-up reel base and 51 is a slide groove.

In FIG. 1, a cylinder device 1 is mounted on a main chassis 2 via a cylinder mounting base 3 at a predetermined inclination angle and in a predetermined direction. A catcher 4 is integrally formed and mounted on the cylinder mounting base 3, and a first delivery guide roller 5 is also mounted on the cylinder mounting base 3 so as to be rotatable. The second entry-side guide roller arm 6 is rotatably mounted on the second entry-side guide roller arm 7.
Is held rotatably about a rotation shaft 8 erected on the main chassis 2. The entry-side inclined guide roller 9, the second inclined guide 10, and the first inclined guide 11 are mounted on a guide base 12, and the guide base 12 is connected to a loading ring 15 via a connecting member 16. ing. 1 including the cylinder device 1 on the inner side of the main chassis 2
Rotating shafts 46, 47, and 48 are implanted along the circumference of each of the rollers, and rollers 43, 44, and 45 are rotatably mounted on the rotating shafts, respectively, and the inner periphery of the loading ring 15 is provided with rollers 43, 44, and 45. The loading ring 15 is brought into contact with the rollers 43, 4
It is held rotatably along the circumference including 4, 45.

The sub-chassis 14 has guide grooves 35 and 36 on one side thereof,
Guide grooves 37, 38 are provided on the other side opposite to this on the same straight line, respectively, and guide shafts 31, 32 implanted on the main chassis 2 in these guide grooves 35, 36, 37, 38, respectively. , 33,34
Are slidably fitted. As a result,
14 is held so as to be movable in the direction of the cylinder device 1 or in the direction opposite thereto.

The first entry side guide roller 17 is mounted on a first entry side guide roller arm 19 which is rotatably held about a rotation shaft 18 implanted on the sub-chassis 14, and is provided with a second output guide roller 17. The side guide roller 20 has a rotating shaft 24 implanted on the main chassis 2.
Outgoing guide roller arm held rotatably about
23. The exit-side drawer guide 25 is erected on an exit-side extractor arm 27 held rotatably about a rotation shaft 26 erected on the sub-chassis 14. The pinch roller 28 is rotatably supported by a pinch roller arm 30 that is rotatably held with respect to a rotation shaft 29 erected on the sub-chassis 14. The capstan 39 is rotatably mounted on the sub-chassis 14.

The linear track head 40 is fixedly supported by a linear track head arm 42 that can be raised and rotated with respect to a rotation shaft 41 supported on the main chassis 2 inside the loading ring 15. Details of this structure will be described later.

Supply reel base 49 and take-up reel base on sub-chassis 14
50, and the supply reel base 49 is a sub-shear.
Along the slide groove 51 provided on the 14, it is possible to move in the direction of the take-up reel table 50 or in the direction opposite thereto. Thereby, the interval between the supply reel table 49 and the take-up reel table 50 can be changed.

In this configuration, the guide base 12 is located in the opening 22 of the tape cassette 21 placed on the sub-chassis 14 before the tape mounting operation is started, and the entrance-side inclined guide roller 9 on the guide base 12, the second inclined The guide 10 and the first inclined guide 11 are located behind the magnetic tape 13 in the opening 22. With the start of the tape mounting operation, the loading ring 15 receives a driving force from an L-ring drive gear (not shown) and rotates in the direction of arrow A. As described above, since the loading 15 and the guide base 12 are connected via the connecting member 16, the guide base 12 moves from the opening 22 of the tape cassette 21 with the rotation of the loading ring 15. Start, entering-side inclined guide roller 9, second inclined guide
The magnetic tape 13 is moved around the cylinder device 1 while gradually increasing its height while pulling out the magnetic tape 13 from the tape cassette 21 with the 10 and the first inclined guide 11.

As the tape mounting operation progresses, the guide base 12
Moves around the cylinder device 1. At this time, the first entry-side guide roller arm 19 simultaneously rotates around the rotation shaft 18 in the direction of arrow B. At this time, the driving of the first entrance guide roller arm 19 is obtained from the outer peripheral gear of the loading ring 15 via the outer peripheral gear of the first entrance guide roller arm 19. At the same time, the exit-side guide roller arm 23 rotates around the rotation shaft 24 in the direction of arrow D,
The exit side withdrawal arm 27 also rotates about the rotation shaft 26 in the direction of arrow E.

After moving around the cylinder device 1, the guide base 12 is engaged with the catcher 4 and is positioned with a predetermined inclination angle and direction. Immediately before the guide base 12 is positioned on the carriage 4, the second entry-side guide roller arm 7 rotates about the rotation shaft 8 in the direction of arrow C, and the pinch roller arm 30 rotates in the direction of arrow F. It rotates around a shaft 29.

FIG. 2 shows a state in which the above-described tape pull-out operation has been completed. FIG. 3 shows the mounting state of the magnetic tape 13 at this time. In this state, the second entrance guide roller 6 is positioned near the first inclined guide 11 on the guide base 12 positioned by the carriage 4, and the first exit side provided on the cylinder mounting base 3. A second exit guide roller 20 is located near the guide roller 5. Further, the pinch roller 30 is in contact with the capstan 39, and the outlet pull-out guide 25 is positioned so as to pull out the magnetic tape 13 from the tape cassette 21 and wind it around the pinch roller 28 at a predetermined angle.

Next, the tape running system based on the helical scan method will be described with reference to FIG. In the figure, 52 is a supply reel, and 53 is a take-up reel.

Magnetic tape ejected from the supply reel 52 of the tape cassette 21
13 reaches the first inclined guide 11 via the first entry side guide roller 17 and the second entry side guide roller 6. During this time, the magnetic tape 13 runs parallel to the main chassis 2 without changing its height. The magnetic tape 13 reaches the entrance-side inclined guide roller 9 from the first inclined guide 11 via the second inclined guide 10. During this time, the height of the magnetic tape 13 gradually increases, and the magnetic tape 13 is at the highest position on the entrance-side inclined guide roller 9. The magnetic tape 13 is gradually lowered in height from the entrance-side inclined guide roller 9 and is spirally wound around the cylinder device 1 over about 180 °.

On the tape exit side of the cylinder device 1, a magnetic tape
13 has the same height as the state of the deep cassette 21 and reaches the first exit guide roller 5, and from the first exit guide roller 5, the second exit guide roller 5 does not change its height. Guide roller 20, capstan 39 and pinch roller 28
, And the take-up reel 53 of the tape cassette 21 via the outlet side draw-out guide 25. With the above-described tape mounted state, the magnetic tape 13 is moved by the pinch roller 28 and the capstan 39.
As the capstan 39 rotates, the magnetic tape 13 travels, and magnetic recording and reproduction of signals can be performed on the magnetic tape 13 by a rotating head (not shown) on the cylinder device 1.

In this embodiment, in order to reduce the size of the apparatus, when the tape mounting state shown in FIG. 3 is completed, the operation for reducing the distance between the cylinder apparatus 1 and the tape cassette 13 is next performed. Perform FIG. 4 shows the operation state.

In this figure, the dashed line indicates the state of the sub-chassis 14 shown in FIG. 3, and the sub-chassis 14 is moved from the state shown in FIG.
Translates along 5,36,37,38. At this time, the supply reel table 49 mounted on the sub-chassis 14 and the take-up reel table
50, first entry side guide roller arm 19, capstan 3
9. The exit side withdrawal arm 27 and the pinch roller arm 30 move in parallel with the sub chassis 14 in the same manner.

This operation is performed in a state where the magnetic tape 13 is mounted on the cylinder device 1. FIG. 5 shows the tape running system in the state where the movement of the sub-chassis 14 is completed at this time.

The tape running state shown in FIG. 5 is between the second entrance guide roller 6 and the first exit guide roller 5,
It is the same as that shown in the figure. When the distance between the cylinder device 1 and the tape cassette 21 changes, the tape winding angle around the first entry side guide roller 17 and the second entry side guide roller 6, the first entry side guide roller 17 and the second Although the tape span between the tape guide 21 and the entrance guide roller 6 changes, the magnetic tape 13 runs parallel to the tape cassette 21 without changing its height. Even if the distance from the magnetic tape 13 is changed, the running state of the magnetic tape 13 does not change. Also, the first
The same can be said for the running state of the magnetic tape 13 between the delivery guide roller 5 and the delivery guide 25. Further, as the sub-chassis 14 moves in the direction of the arrow P (FIG. 4), the magnetic tape 13 sags,
By rotating the reel 52 or the take-up reel 53, the slack of the magnetic tape 13 can be absorbed. The driving force of each reel base at this time may be a driving force from a motor (not shown) for rotating these reel bases during recording / reproducing, or a driving force for moving the sub chassis 14. Good.

In the state shown in FIG. 5, the linear track head 40, which is a fixed magnetic head, is not used and is disposed below the tape cassette 21.

Next, in this embodiment, the linear track head 40 is used.
The case of recording / reproducing on a magnetic tape of a linear track type tape cassette by using FIG. 6 will be described with reference to FIG. 6 (a) is a plan view in that case, FIG. 6 (b) is a side view as viewed in the direction of arrow X in FIG. 6 (a), and FIG. 6 (c) is a direction in arrow Y in FIG. 54 is a tape cassette (hereinafter, referred to as a compact cassette) for a linear track system, 55 is a slide arm of a supply reel stand, 56 is a rotating shaft, 57 is a head elevating arm, 58
Is a rotating shaft, 59 is an arm driving gear, 60 is a mode gear, 61 is a rotating shaft, 62 is an arm driving arm, 63 is a rotating shaft, 64 is a reel base crown, 65 is a rising portion, and 66 is a guide boss. 1 are given the same reference numerals.

In FIG. 6, the head raising / lowering arm 57 is pivoted about a pivot shaft 58 set on the main chassis 2.
Are supported so as to be rotatable in parallel with the. An arm drive gear 59 is integrally formed on a lower surface of the head lifting arm 57. The mode gear 60 is rotatably supported around a rotation shaft 61 erected on the main chassis 2, and the gear on the outer peripheral surface of the mode gear 60 meshes with the arm drive gear 59. In addition, the reel base slide arm 55 has a sub-shear.
The sub-chassis 14 is supported so as to be rotatable in parallel with the sub-chassis 14 about a rotation shaft 56 erected on the sub-chassis 14. The arm drive arm 62 is supported so as to be rotatable in parallel with a plane perpendicular to the sub-chassis 14 around a rotation shaft 63 erected on a rising portion 65 at the front side edge of the sub-chassis 14.

The supply reel table 49 is held so as to be able to move in parallel along a slide groove 51 provided in the sub-chassis 14, and a guide boss 66 is integrally provided on the lower surface of the supply reel table 49, and the guide boss 66 is It is engaged with the reel base slide arm 55.

Next, the operation of the mechanism shown in FIG. 6 for the compact cassette 54 will be described.

When using the linear track head 40, a compact cassette 54 from which the magnetic tape 13 is not pulled out is used.
In the compact cassette 54, the pitch between the reels is different from that in the case of the above-described helical scan type tape cassette 21, and the compact cassette 54 does not have an opening for drawing out the tape. For this reason, in this case, the guides used to pull out the magnetic tape 13 from the tape cassette 21 move as described above before mounting the compact cassette 54,
It is in the same state as shown in FIG. The change to this state is started when it is detected that the compact cassette 54 is inserted from the insertion slot (not shown) (this detection mechanism will be described later). In the state shown in FIG. 6, the cassette 54 moves in the vertical direction shown by the arrow I from the position of the dashed line shown by 54 ', as shown in FIG. 6 (c). With the movement of the compact cassette 54, the arm drive arm 62 is moved to the compact cassette.
As shown by an arrow II in FIG. 6 (c), it is rotated about the rotation shaft 63 from the state shown by the dashed line as 62 'as shown by the arrow II in FIG. 6 (c). As described above, the arm drive arm 62 is engaged with the reel base slide arm 55, and moves in the direction of arrow III from the position indicated by the alternate long and short dash line as 55 'with the rotation of the arm drive arm 62. Then, by the movement of the reel base slide arm 55, the supply reel base 49 moves along the slide groove 51 in the direction of arrow IV,
The pitch between 49 and the take-up reel base 50 changes from l 'to l. In addition, since the compact cassette 54 has a larger outer shape than the tape cassette 21, the arm drive arm 62 of the above-mentioned reel base moving mechanism does not come into contact with the small tape cassette 21 and the compact cassette 54 By arranging them so as to abut at Q, a reliable reel base moving mechanism can be realized without a drive source other than the cassette elevating mechanism, which is naturally required only when the pitch between reels is changed.

Here, the reel base crown 64 and the compact cassette 54
The shape of the arm drive arm 62 and the position of the rotation shaft 63 are determined so that the movement of the supply reel table 49 is completed before the mounting operation of the cono-pak cassette 54 is completed in order to avoid interference with the Can be Further, when the above-mentioned helical scan type tape cassette 21 is used, each tape guide member used to pull out the magnetic tape 13 from the tape cassette 21 is also configured as follows in order to avoid interference with the compact cassette 54. It has become. That is, the compact cassette is connected to the contact Q of the arm drive arm 62.
The inserted cassette is detected as being a compact cassette 54 by the contact of 54, and at the same time as this is detected, loading is performed by an electrical contact (not shown) interlocked with the arm drive arm 62. A drive source (not shown) such as a motor for moving the ring 15 and each tape guide member starts, and each tape guide member moves to the state shown in FIG. That is, the compact cassette 54
The movement of the supply reel table 49 and each of the tape guide members is completed before the end of the mounting.

Next, the movement operation of the linear track head 40 will be described. When the mode gear 60 rotates in the direction of arrow Q as shown in FIG. 6 (a), the head lifting / lowering arm 57 rotates in the direction of arrow R with this, and, together with this, the head gear 57 in FIG. 6 (b). As shown in FIG. 7, the linear track head arm 42 is pivotally moved in the direction of arrow S about the pivot shaft 41, and the linear track head 40 is a magnetic tape in the compact cassette 54.
13 and comes into a recording / reproducing state. At this time, as shown in FIG. 6 (a), the pinch roller 28 is pressed against the capstan 39 by the rotation of the pinch roller arm 30 from the state shown by the broken line, and the magnetic tape 13 is clamped. The magnetic tape 13 is driven by the rotation of 39. Also,
The above description shows the contact state, but the separating operation is reversed by the urging member such as the spring.

In this embodiment, the linear track head 40 stands up from below the compact cassette 54.
The same effect can be obtained by disposing on the upper surface side of the compact cassette 54. The driving source of the mode gear 60 is loading.
It may be the same as the 15 drive sources, or may be a separate connection.
In the former case, after the movement operation of each tape guide member shown in FIG.
By further rotating the mode gear 60 after the completion of the moving operation, the above-described moving operation of the linear track head 40 can be performed, so that it is not necessary to add a driving source. The same effect can be obtained even when linked with the above-mentioned reel base moving mechanism.

FIG. 7 shows another embodiment of the magnetic recording / reproducing apparatus according to the present invention. FIG. 7 (a) is a plan view, FIG. 7 (b) is a side view, 67 is a head lifting arm, and 68 is a rotating arm. Axis, the first
6 and FIG. 6 are denoted by the same reference numerals.

5A and 5B, the head lifting arm 67 is supported so as to be rotatable on a plane perpendicular to the main chassis 2 around a rotary shaft 68 supported by the main chassis 2, and the compact cassette 54 is By the mounting operation, the head is moved in the direction of arrow T from the position indicated by the two-dot chain line indicated by 54 "in Fig. 7 (b).
The linear track head 40 is pushed by the lower surface of 54 and pivots about the pivot shaft 68 in the direction of the arrow U, and the linear track head 40 rises from the position shown by the dashed line 40 '. Thereafter, the sub-chassis 14 moves in the direction of the arrow V, and accordingly, the compact cassette 54 moves parallel to the direction of the cylinder device 1 indicated by the arrow W, and 54 '.
And the position indicated by the broken line. As a result, the linear track head 40 comes into contact with the magnetic tape 13 in the compact cassette 54.

As described above, the contact mechanism of the magnetic tape 13 in the compact cassette 54 of the linear track head 40 is obtained by moving the linear track head 40 up and down using the operation of the compact cassette 54. On the other hand, in still another embodiment shown in FIG. 8, a rotating shaft provided on the main chassis 2 is provided.
A linear track head 40 is provided on a head rotating arm 70 that rotates in parallel with the surface of the main chassis 2 around 69.
The linear track head 40 comes into contact with the magnetic tape 13 in the compact cassette 54 by the rotation of the head rotation arm 70 from the state shown by the dashed line 70 '.

Above, the compact cassette of the linear track head 40
Although the contact mechanism for the magnetic tape 13 in 54 has been described,
In the above-described tape cassette 21 for the helical scan system and the compact cassette 54 for the linear track system described above, the positions of the positioning pins naturally differ due to the difference in the positions of the cassette positioning holes. This will be described with reference to FIG.

In FIG. 8, a positioning pin on the tape supply side is provided at the end.
A positioning arm 71 provided with 75 is rotatably supported by the sub-chassis 14 about a rotation shaft 72, and a spring 73 stretched between the positioning arm 71 and a spring hook 74 implanted in the sub-chassis 14. As a result, the rotary shaft 72 is urged to rotate counterclockwise about the rotary shaft 72. The positioning arm 71 is in a state indicated by a solid line when the compact cassette 54 is used. In this state, the supply reel base 49 moves the slide groove 51 to the left and is pressed against the urging force of the spring 73. Is determined by As described above, when the tape cassette 21 for the helical scan system is used, the supply reel table 49 is at the position indicated by the dashed line 49 'in FIG. 8, but in this case, the positioning arm 71 is used. Is in contact with the stopper 76 planted on the sub-chassis 14 by the urging force of the spring 73, as indicated by the dashed line 71 '.

As described above, the positioning pin 75 of the cassette changes its position according to the type of the cassette. The positioning pin 77 on the tape winding side is held on a positioning arm 78, as shown in FIG.
Are supported by the subchassis 14 so as to be rotatable around the center.
When using the compact cassette 54, the positioning arm 78 is in the state shown by the solid line in FIG. 8, and when using the tape cassette 21 for the helical scan system, the positioning arm 78 is used.
8 'is in the state shown by the dashed line. In this case, the positioning pin 77 is located at a position avoiding the tape cassette 21 shown by a dashed line 77 ', and the tape cassette 21 is positioned by a positioning pin (not shown) arranged coaxially with the rotation shaft 79.

〔The invention's effect〕

As described above, according to the present invention, a magnetic recording / reproducing apparatus using a helical scan method can perform recording / reproducing with a linear track type tape cassette using a fixed head only by adding a simple mechanism. Therefore, compatibility of different types can be realized.

[Brief description of the drawings]

1 to 6 show an embodiment of the magnetic recording / reproducing apparatus according to the present invention. FIG. 1 is a plan view showing a state before the tape mounting operation is started, and FIG. 2 is a tape cassette for a helical scan system. On the other hand, FIG. 3 is a plan view showing the tape running system in the state shown in FIG. 2, and FIG. 4 is a plan view showing the tape cassette mounting position setting operation. FIG. 5 is a plan view showing the tape running path after the completion of the mounting position setting operation shown in FIG. 4, FIG. 6 (a) is a plan view showing the operation for the tape cassette for the linear track system, and FIG. 6 (b) is a side view as viewed from the direction of arrow X in FIG. 6 (a), and FIG. 6 (c) is FIG. 6 (a).
7 (a) is a plan view showing another embodiment of the magnetic recording / reproducing apparatus according to the present invention, FIG. 7 (b) is a side view thereof, and FIG. FIG. 11 is a plan view showing still another embodiment of the magnetic recording / reproducing apparatus according to the present invention. 1 ... cylinder device, 12 ... guide base, 13 ... magnetic tape, 14 ... sub-chassis, 15 ... loading ring, 16 ... connecting member, 21 ... tape cassette, 28 ... pinch roller, 31 ~ 34 …… Guide shaft, 35-38 …… Guide groove, 39
...... Capstan, 40 ... Linear track head, 42 ...
… Linear track head arm, 49 …… Supply reel base,
50 ... take-up reel base, 51 ... slide groove, 54 ... compact cassette, 55 ... supply reel base slide arm, 57
…… Head lifting arm, 59 …… Arm drive gear, 60 ……
Mode gear, 67 ... Head elevating arm, 70 ... Head rotating arm.

Claims (2)

(57) [Claims] A magnetic tape is provided from a mounted helical scan type first tape cassette and wound around the cylinder device to perform recording and reproduction by the rotary head. In the magnetic recording / reproducing apparatus of the helical scan system, first means for mounting the first tape cassette and a second tape cassette for a linear track system larger than the first tape cassette, A linear track head, and second means for switching and setting the linear track head between a first position and a second position, wherein the second means comprises: When the linear head is not in contact with the first tape cassette and is not operated, the linear head does not hinder the magnetic tape from being pulled out from the first tape cassette. When the second tape cassette is mounted, the linear tape head is actuated by contacting the second tape cassette, and the linear track head is moved from the first position to the second tape cassette. The magnetic recording / reproducing apparatus is set at the second position in contact with the magnetic tape in the tape cassette. 2. A recording apparatus comprising a cylinder device to which a rotary head is attached, a magnetic tape being drawn from a mounted helical scan type first tape cassette, wound around the cylinder device, and recording / reproducing by the rotary head. In the magnetic recording / reproducing apparatus of the helical scan system, first means for mounting the first tape cassette and a second tape cassette for a linear track system larger than the first tape cassette, A linear track head; second means for bringing the linear track head into contact with the magnetic tape in the mounted second tape cassette; and operating only in contact with the mounted second tape cassette. The distance between the two reel bases from that for the first tape cassette to that for the second tape cassette And a third means for switching and setting the reels. The third means moves the reels of the first and second tape cassettes by moving one of the two reel stands while fixing the other. A magnetic recording / reproducing apparatus characterized by setting an interval between tables.