JP2509076B2 - Magnetic recording / reproducing device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cassette type magnetic recording / reproducing apparatus applicable to either a small cassette or a standard cassette.

[0002]

2. Description of the Related Art FIG. 14 is a schematic view showing a conventional magnetic recording / reproducing apparatus for recording / reproducing a standard cassette. In the figure, 1 is a VHS type standard cassette, 2 is a take-up reel, 3 is a supply reel, 4, 5 are guide pins, 6, 7,
Reference numeral 8 is a cutout portion, 9 is a magnetic tape, and 10 is a magnetic recording / reproducing apparatus (hereinafter referred to as VT) for recording or reproducing the standard cassette 1.
R), 11 is a head for recording or reproducing audio and control signals (hereinafter referred to as AC head), 12 is a full width erasing head, 13 is a pinch roller, 1
4 is a capstan, 15, 16 and 17 are tape guides,
Reference numerals 18 and 19 respectively denote a take-up reel stand and a supply reel stand, and 20 denotes a rotary drum having a video head for recording or reproducing a video signal.

FIG. 15 is a diagram showing a small cassette smaller than the standard cassette 1. In the figure, 101 is V
HS standard compact cassette or small cassette, 102 is a take-up reel, 103 is a supply reel, 10
Reference numerals 4, 105 are guide pins, 106, 107, 108 are notches, and 109 is a magnetic tape. In the figure, the alternate long and short dash line is an imaginary line of the standard cassette 1 drawn to show the approximate relative size relationship between the small cassette 101 and the standard cassette 1.

Further, FIG. 16 is a view showing a cassette adapter required for recording / reproducing the small cassette 101 with a VTR for a standard cassette. In the figure, 20
1 is a cassette adapter, 202 is a movable lever, 203
Is a tape guide installed on the movable lever 202, 204
Is a movable lever, 205 is a tape guide embedded in the movable lever 204, and 210 is an opening / closing lid of the cassette adapter 201. The cassette adapter 201 is shown in FIGS.
The external shape is almost the same as the standard cassette 1 shown in FIG. The small cassette 101 has an opening / closing lid 110.
And a gear 111.

Next, the case where the standard cassette 1 is loaded into the VTR 10 for recording or reproduction will be described. First, the standard cassette 1 is inserted into a cassette holder (not shown) provided in the VTR 10, and this cassette holder is moved manually or automatically to load it at the position shown in FIG. 14 (a). At this time, the reel stands 18 and 19 of the VTR 10 are fitted into the hubs of the take-up reel 2 and the supply reel 3 in the cassette, respectively. Further, a capstan 14 is inserted into the notch 6 of the standard cassette 1, a tape guide 15 is inserted into the notch 7, and tape guides 16 and 17 are inserted into the notch 8.

When recording or reproducing on the standard cassette 1 thus arranged, as shown in FIG. 14B, the magnetic tape 9 in the standard cassette 1 is moved to the tape guides 15, 1.
14 and 17, respectively, are moved and pulled out as shown by the dashed line arrow in FIG. As a result, the magnetic tape 9 comes into contact with the AC head 11, the full-width erasing head 12 and the rotary drum 20 as shown in FIG. In this state, the pinch roller 13 is moved to sandwich the magnetic tape 9 together with the capstan 14 as shown in FIG. 14B, and the capstan 14 and the take-up reel 2 are driven to rotate. ) Follow the travel route shown in. When recording, the erasing current is supplied to the full-width erasing head 12 and the video head of the rotating drum 20 and A
A desired signal current is supplied to each of the C heads 11. In the case of reproduction, the signal recorded on the magnetic tape 9 is read by the video head of the rotary drum 20 and the AC head 11.

Next, when recording or reproducing the small cassette 101, the small cassette 101 is directly used for V recording.
It cannot be applied to TR10. That is, the sizes of the small cassette 101 and the standard cassette 1 are different as shown in FIG. 15, the take-up reel base 18 does not fit, and the tape guides 15, 16, 17 and the capstan 14 have notches 106, 107 ,. Various inconveniences such as not entering 108 occur.

In order to solve this, a cassette adapter 201 is conventionally used as shown in FIG. That is,
The small cassette 101 is fitted into the cassette adapter 201 as shown by the arrow in FIG. At this time, the tape guides 203 and 205 enter the notches 106 and 108 (see FIG. 15) of the small cassette 101, respectively. Next, the open / close lid 110 of the small cassette 101 is opened (the mechanism thereof is not shown), and the movable levers 202 and 204 are rotated (the rotating mechanism is not shown) by the tape guides 203 and 205. The magnetic tape 109 in 101 is pulled out into the cassette adapter 201 as shown in FIG.
A part of the tape guide 203 from the tape guides 203 to 205 is made substantially equal to the tape path in the standard cassette 1. That is, the tape guide 203 shown in FIG. 16 moves to a position corresponding to the guide pin 4 in the standard cassette 1 (see FIG. 15), and the tape guide 205 moves to a position corresponding to the guide pin 5 (see FIG. 15).

The cassette adapter 201 in which the small cassette 101 is set as described above is attached to the opening / closing lid 21.
0 is opened and mounted on the conventional VTR 10, and the VTR 1 is attached to the hub of the supply reel 103 in the small cassette 101.
No. 0 supply reel stand 19 is fitted, and FIG.
The take-up reel 10 in the small cassette 101 as shown in FIG.
Gear 2 provided in the cassette adapter 201 for 2
11 is engaged, and the take-up reel base 18 of the VTR 10 is attached to the hub of the take-up gear 212 engaged with the gear 211.
To fit. In this way, the magnetic tape 109 in the small cassette 101 can also take a tape traveling path for recording or reproduction in the same manner as described with reference to FIG. 14, so that the conventional VTR 10 can be applied.

[0010]

Since the conventional VTR is constructed as described above, in order to record / reproduce the small cassette 101 with the standard type VTR, the cassette adapter 201 cannot be directly attached to the VTR. There is a problem in that it is necessary and the small cassette 101 has to be attached to and detached from the cassette adapter 201 one by one.

The present invention has been made to solve the above problems, and an object thereof is to obtain a VTR capable of selectively loading either a standard cassette or a small cassette.

[0012]

A VTR according to the present invention
In a magnetic recording / reproducing apparatus for selectively recording or reproducing a standard cassette or a small cassette in the cassette holder, a rotating lever for detecting the presence or absence of the standard cassette in the cassette holder part, A link mechanism that moves according to the movement of the rotation lever when the standard cassette is detected by the rotation lever, and a guide plate that moves to a position outside the passage path of the standard cassette in conjunction with this link mechanism Is.

[0013]

According to the present invention, when the small cassette is loaded, the small cassette is guided by the guide plate which guides the small cassette, and when the standard cassette is loaded, the rotation lever for detecting the presence or absence of the standard cassette is detected. The guide plate is moved so as to escape to the outside of the passage of the standard cassette.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 is an external front view of the magnetic recording / reproducing apparatus, FIG. 2 is an exploded view showing the structure of the cassette mounting portion of FIG. 1,
3 is a view showing the structure of the sub-board portion, FIG. 4 is a top view of FIG. 3, FIG. 5 is a view showing a combined state of the cassette holder and the sub-board, and FIG. 6 is a mechanism for moving the guide plate up and down. Figure,
FIG. 7 is a view showing the opening / closing mechanism of the opening / closing lid of the small cassette, FIG.
FIG. 9 is a diagram showing a drive mechanism of a cam, FIG. 9 is a diagram showing a relationship between a cassette holder and a tape guide, FIG. 10 is a diagram showing a state in which a take-up reel base and a take-up reel are engaged via a gear, FIG. 11 is a view showing the structure of the winding gear part, FIG. 12 is a view showing the structure of the lock releasing pin part, and FIG. 13 is a view showing the structure of the door part and the guide part, which are the same as or equivalent to those of the conventional device. The same reference numerals are given to the parts and the description thereof will be omitted.

In the figure, reference numeral 21 designates a cassette insertion opening (see FIG. 1) for loading the standard cassette 1 or the small cassette 101 according to the VHS standard into the magnetic recording / reproducing apparatus 10 (see FIG. 1).
2 is a first door provided in the cassette insertion port 21, 23 is a second door, 24 is a front panel, 25 is a cassette holder into which the standard cassette 1 or the small cassette 101 is inserted (see FIG. 2), 26 Is a second link which is arranged on the outer wall portion of the cassette holder 25 and moves upward only when the standard cassette 1 is inserted into the cassette holder 25, 27 and 28 are connected to the second link 26 and the small cassette 101 is connected to the cassette. Guide plates for guiding the small cassette 101 to the correct position when it is inserted into the holder 25, and 29 and 30 are grooves provided on the upper plate of the cassette holder 25 for inserting the guide plates 27 and 28,
Guide pins 31, 332, and 333 are provided on one side surface of the cassette holder 25 and provided to move the cassette holder 25.
Also, similar guide pins (see FIG. 9), 34 and 35 are recesses provided on the side surface of the cassette holder 25 and into which a tape guide described later enters, and 36 is a first for moving the second link 26 in the vertical direction. It is a link.

Support plates 37 and 38 are arranged on the left and right sides of the cassette holder 25 and support the cassette holder 25, and 39, 40 and 41 are guide pins 31, 32.
And 33 respectively inserted and the cassette holder 25
Guide grooves for guiding the movement of the cassette holders 439, 440 and 441 are the same guide grooves, and 42 is the cassette holder 25.
A support shaft that is planted on one side of the
43 and 44 are rack plates provided along the support plates 37 and 38, respectively, and 45 and 46 are rack plates 43.
And 44 are racks, 47 and 48 are cassette loading gears for moving the standard cassette 1 or the small cassette 101 inserted in the cassette holder 25 together with the cassette holder 25, and 49 and 50 are integral with the cassette loading gears 47 and 48. Drive arms, 51 and 52 are cams for moving a sub-substrate described below up and down with respect to the cassette holder 25, 53 and 54 are gears integrally combined with the cams 51 and 52,
55 is a support shaft of the gear 53.

Reference numeral 56 designates a hole provided on the bottom surface of the cassette holder 25 for receiving the take-up reel stand 18 in the magnetic recording / reproducing apparatus main body when the cassette is loaded in the magnetic recording / reproducing apparatus 10, and 57 also designates the supply reel stand 19 And 58 is a hole provided in the side wall of the cassette holder 25 for supporting the support shaft 55 of the gear 53.

Reference numeral 59 denotes a small cassette 1 provided below the cassette holder 25 and inserted in the cassette holder 25.
01 is a sub-board on which a mechanism for pulling out or winding up the magnetic tape 109 is arranged, 60 and 61 are holes similar to those described for the holes 56 and 57, and are provided on the sub-board 59 and the take-up reel base 18 and the supply reel. Holes for reel reels 19 to enter (see FIGS. 3 and 4), 6
Reference numeral 2 is a rotary lever, 63 is a tape guide which is embedded in the rotary lever 62 and is used to pull out the magnetic tape 109 of the small cassette 101, 64 is a rotary lever, and 65 is a rotary lever 64. A tape guide for pulling out the magnetic tape 109, and 66 to 70 are a group of gears for rotating the rotating lever 62. Each gear is rotatably supported on the sub-board 59 and engaged with its neighbors. Is held. Reference numeral 71 designates a gear rotatably supported on the sub-board 59 and held in engagement with the gear 70. Reference numeral 72 designates a gear 71.
A movable gear adapted to be engaged with or disengaged from the movable gear, 73 is a pulley integrated with the movable gear 72, 74 and 75 are pulleys integrated with each other, 7
6 and 77 are belts, 78 is a movable gear, 94 is a pulley integrated with the movable gear 78 (see FIG. 4), and 79 is driven when the movable gear 78 is engaged and rotatable on the sub-board 59. A gear that is axially supported, 80 is a gear that is integral with the gear 79, 81 is a gear that is engaged with the gear 80 and is movable in the axial direction, 82 is integral with the gear 81, and a take-up reel of the small cassette 101 Gears for driving 102, 83 are spring plates for moving the integrated gears 81 and 82 in the axial direction, and 84 is an integrated gear 72.
And the pulley 73 and the integrated pulley 94 and gear 78
A pivot lever that pivotally supports and and that is rotatable around a support shaft 88 that is planted on the sub-board 59;
4 is a gear pivotally supported on the sub-board 59, 86 is a cam provided at one end of the rotating lever 62 for rotating the rotating lever 84, and 87 is the small cassette 1.
01 is a pin for releasing the lock of the take-up reel 102, and 88 is a sub-board 5 for pivotally supporting the rotating lever 84 and at the same time pivotally supporting the integrated pulleys 74 and 75.
9 is a support shaft, 89 is a spring for biasing the turning lever 84, and 90 to 93 are guide pins (see FIG.
(See) is a guide hole that is made to penetrate.

Reference numeral 310 is a guide pin (see FIG. 5) that is set up on the lower surface of the cassette holder 25, 302 is a spring that pushes the sub-board 59 away from the cassette holder 25, and 308 is a first link 36. Cassette holder 25
Of the cassette holder 25 (see FIG. 6), the spring 309 also extends to the other side surface of the cassette holder 25, and 310 and 311 denote one side surface portion and the other side surface portion of the cassette holder 25. And pivoting levers 314 and 315 which are respectively rotatably supported on both side surfaces of the cassette holder 25 by means of pivots 312 and 313, respectively.
36 rotatably supporting 36 and the cassette holder 2
The support shafts 316 and 317 provided on one side surface portion and the other side surface portion of the guide plate 27 are the guide plates 27 and 2, respectively.
8, a rotary lever rotatably attached to the support shafts 318 and 319, 320 is a leaf spring stretched between the rotary lever 316 and the guide plate 27 (see FIG. 7).
Is.

Gears 321 and 322 are integrally connected (see FIG. 8), and reference numerals 323 and 324 are support shafts 32.
A gear 326 rotatably attached to both ends of a rotary lever 325 which rotates around 7 is a spring for pulling the rotary lever 325, and 337 is a tooth stretched over the gears 322, 323, 53 and 324. Belt (see Figure 8),
Reference numeral 328 denotes a stopper (see FIG. 9) for preventing the small cassette 101 from entering further than the predetermined position of the cassette holder 25, and reference numerals 329 and 330 denote the standard cassette 1 further inward than the predetermined position of the cassette holder 25. A stopper 334 for preventing entry is provided so that the pin 87 projects from the bottom surface of the housing of the cassette holder 25, and a stop 335 allows the gear 82 and the spring plate 83 to project from the bottom surface of the housing of the cassette holder 25. The holes 340 provided are gears 81 and 82.
A spring (see FIG. 11) for pushing the sub substrate 59 toward the housing side of the cassette holder 25, 341 a gear (see FIG. 10) provided on the flange portion of the take-up reel stand 18, and 342 gears 81 and 82. Pins (see FIG. 10) rotatably supported and erected on the sub-board 59 are springs (see FIG. 12) for pushing the pin 87 from the sub-board 59 to the housing side of the cassette holder 25.

Reference numerals 350 and 351 denote cassette insertion ports 21.
Rotation levers (see FIG. 13) provided on the left and right sides of the
Is a lock for preventing the first door 22 from being opened, 353 and 354 are guides for guiding the small cassette 101 into the housing of the cassette holder 25, and 355 are first and second doors. 22 and 23 spindles,
Reference numeral 356 is a spring for imparting a bias to the rotating lever 350.

Next, the operation will be described. First, the case of loading the standard cassette 1 will be described. When the standard cassette 1 is inserted through the insertion opening 21 of the magnetic recording / reproducing apparatus 10 shown in FIG. 1, first, the lower parts of both front end portions of the standard cassette 1 come into contact with the rotating levers 350 and 351 shown in FIG. When the cassette insertion port 21 is further inserted, the rotation levers 350 and 351 rotate.
The first door 22 is unlocked. This will be described in more detail with reference to FIG. 13. The inserting lever of the standard cassette 1 causes the rotating levers 350 and 351 to rotate around the shaft against the tensile force of the spring 356 as indicated by the arrow in the figure, and at the same time The fixed lock lever 352 and the guides 353 and 354 also rotate. The lock lever 352 unlocks the first door 22 provided at the cassette insertion port 21. Note that no lock mechanism is provided for the second door 23 here. When the standard cassette 1 is further inserted from this state, both doors 22 and 23 are pushed open by the front part of the standard cassette 1 with the support shaft 355 as the central axis. When the standard cassette 1 is further inserted, it enters the cassette holder 25. At this time, as described above, the guide 35
Since 3 and 354 are also rotated, they do not hinder the insertion of the standard cassette 1.

Next, the standard cassette 1 is brought into contact with the rotating levers 310 and 311 shown in FIG. 2 to be rotated, and the guide plates 27 and 28 are moved via the link mechanisms 26 and 36 to the cassette holder 25 shown in FIG. Push up above. This does not hinder the insertion of the standard cassette 1. This mechanism will be described in more detail with reference to FIG. 6. The rotation levers 310 and 311 rotate around the support shafts 312 and 313 in the arrow direction by the insertion of the standard cassette 1, and the first links 36 and 336 move the springs 308 It is rotated around the support shafts 314 and 315 against 309. These first links 36 and 336 push the second link 26 upward as indicated by the arrow in FIG. 6, so that the guide plates 27 and 28 are pushed upward. In this way, the guide plates 27 and 28 move to a position where they do not hinder the insertion of the standard cassette 1.

Next, the spring plate 83 shown in FIG. 9 by the standard cassette 1 is pushed down to the lower part of the housing of the cassette holder 25, and when the gear 82 projects from the hole 335, it is pushed down by the spring plate 83, and the standard cassette It does not hinder the insertion of 1. This situation will be described with reference to the sectional view shown in FIG. 11. When the spring plate 83 is pushed downward from the position shown by the solid line in FIG. 11 as shown by the arrow as the standard cassette 1 enters, the cassette as shown in FIG. The gear 82 protruding above the hole 335 of the holder 25 is pushed down along the pin 342 against the spring 340. In this way, the spring plate 83 and the gear 82
Goes down to the position indicated by the broken line in FIG.
If possible. Here, the gear 82 is the gear 81
, Is arranged on the sub-board 59 as shown in FIGS. 3, 4 and 11, and is rotatably and vertically movable by a pin 342. The gears 82 and 81 are pushed up by the spring 340. In this state, even though the tip of the spring plate 83 is in the recess provided in the middle of the gears 82 and 81, 11 are arranged so as not to come into contact with each other, the tip of the spring plate 83 has the gears 82 and 8
It does not become a load during the rotation of 1.

Further, when the standard cassette 1 is inserted, FIG.
As shown in, the front end of the standard cassette 1 abuts on the stoppers 329 and 330 provided on the cassette holder 25, and further insertion is prevented.

When the standard cassette 1 comes to the positions of the stoppers 329 and 330 in this way, the cassette loading gears 47 and 48 shown in FIG. 2 are rotationally driven by the drive gear (not shown), and the drive arms 49 and 50.
Respectively move the guide pins 33 and 333 along the L-shaped guide grooves 41 and 441, and at the same time, the guide pins 31, 32, 331 and 332 also move along the guide grooves 39, 40, 439 and 440, respectively. The cassette holder 25 is moved until the standard cassette 1 reaches the regular loading position as shown in FIG. In the course of this movement, while the cassette holder 25 is moving in the cassette insertion direction, the gears 66 and 85 on the sub-board 59 are rotationally driven by the racks 45 and 46 in accordance with the movement of the cassette holder 25. Alternatively, the tape guides 63 and 65 shown in FIG. 4 move (these moving mechanisms will be described later in the description of loading a small cassette),
Further, by moving the rack plates 43 and 44 in a direction (arrow A in FIG. 2) opposite to the movement of the cassette holder 25 in the cassette insertion direction by a drive mechanism (not shown), the tape guides 63 and 65 move further than the above, Figure 4
The position reaches the broken line indicated by. In this way, as shown in FIG. 9, the standard cassette 1 is released into the recesses 32 and 35 on both sides of the cassette holder 25 so as not to interfere with the mounting of the standard cassette 1.

The sub-board 59 itself is also driven by a cam to be brought closer to the lower surface of the cassette holder 25, and when the cassette holder 25 reaches the above-mentioned regular loading position, a reel stand on the magnetic recording / reproducing apparatus main body. It is made so as not to contact various parts in the vicinity (thus making it possible to make the device thinner). In such a state, the take-up reel base 18 and the supply reel base 19 of the magnetic recording / reproducing apparatus main body penetrate through the holes 60 and 61 of the sub-board 59 and the holes 56 and 57 of the cassette holder 25, and the standard cassette 1 Of the take-up reel 2 and the supply reel 3. The opening / closing lid of the standard cassette 1 is opened during the loading of the cassette, but the opening / closing mechanism is omitted here.

When the standard cassette 1 is loaded in the regular position as described above, the subsequent loading and recording / reproducing operations of the magnetic tape 9 are the same as those described in the conventional example, and therefore the description thereof is omitted.

Next, when the standard cassette 1 is taken out, the magnetic tape 9 is unloaded and wound into the standard cassette 1, and then the cassette loading gear 47 shown in FIG.
The guide pins 33 and 333 are moved along the L-shaped guide grooves 41 and 441 by rotating the guide pins 33 and 333 in the direction opposite to the direction when the cassette is loaded. At this time, the opening / closing lid of the standard cassette 1 is also closed again by the opening / closing mechanism (not shown). In this way, the cassette holder 25 is returned to the original position apart from the above-mentioned regular loading position.

At this time, the door 2 of the cassette insertion port 21
2 and 23 are cassette loading gears 47 and 4
It is designed to be opened by a lever mechanism (not shown) which operates in response to the rotation of 8. In this state, the standard cassette 1 can be taken out from the cassette holder 25,
When the standard cassette 1 is removed from the cassette insertion port 21 shown in FIG. 1, the doors 22 and 23 are closed again, the rotary levers 350 and 351 are also returned to their original positions, and the lock lever 352 locks the door 22. In addition, as a matter of course, at this time, the rotation lever 3 provided on the cassette holder 25
10, 311 and related links, spring plate 83, etc., when the standard cassette 1 is inserted,
Each member that has been displaced by is returned to its original position. Further, the sub-board 59, the tape guides 63, 65, etc. also return to their original positions through the reverse operation process described above.

Next, the case of loading the small cassette 101 will be described. When the small cassette 101 is inserted through the insertion opening 21 of the magnetic recording / reproducing apparatus 10 shown in FIG.
Since the second door 23 corresponding to the insertion portion of the small cassette 101 has no lock and the first door 22 is locked, the small cassette 101 can be inserted from the second door 23 portion. When the small cassette 101 is inserted from this part, the second door 2
3, the small cassette 101 enters the cassette holder 25 while the side surfaces of the cassette are regulated by the guides 353 and 354 shown in FIG. In the cassette holder 25, the guide plate 2 shown in FIG.
Both sides of the cassette are regulated by 7 and 28 to enter. In the process of inserting the small cassette 101 along the guide plates 27 and 28, the small cassette 1
The opening / closing lid 110 of 01 is opened by the action of the rotating levers 316 and 317.

This will be described in detail with reference to FIG. When the small cassette 101 was inserted as shown in FIG. 7, the opening / closing lid 110 of the small cassette 101 began to come into contact with the turning lever 316 pushed downward by the leaf spring 320, and the turning lever 316 was provided. As shown in FIG. 7, the projecting portion opens the opening / closing lid 110 by receiving a turning force indicated by an arrow P around its support shaft. The other rotating lever 317 has the same function. When the small cassette 101 is further inserted, the small cassette 1 is locked by the stopper 328 shown in FIG.
01's entry is blocked.

Thus, when the small cassette 101 is inserted to the position of the stopper 328, the sub-board 59 shown in FIGS. 2 to 4 moves upward so as to approach the lower surface of the cassette holder 25. . This is shown in Figure 2.
This will be described with reference to FIGS. The sub-board 59 is arranged below the cassette holder 25 as shown in FIG. 2, and the sub-board 59 is provided with through holes 90 to 93 as shown in FIG. 3, and these holes 90 to 93 are provided with holes of the cassette holder 25. Each of the pins 301 planted on the lower surface is inserted, and the sub-board 59
Is held. A spring 302 is wound around these pins 301, and presses the sub-board 59 downward from the lower surface of the cassette holder 25. For example, as shown in FIG. 5, the pin 301 is inserted into the hole 90 of the sub-board 59, and the spring 302 pushes the sub-board 59 downward. A similar structure is adopted for the remaining holes 91 to 93. In this state, the hole 58 of the cassette holder 25
Moving gears 53 and 54 of the sub-board 59 supported by
When is driven to rotate, the cams 52 and 52 directly connected to the gears 53 and 54 push up the sub-board 59 against the spring 302 while coming into contact with the end surface of the sub-board 59. At this time, the teeth of the gears 66 and 85 are respectively shown in FIG.
Moves upward along the racks 45 and 46 shown in FIG.
The moving gears 53 and 54 of the sub-board 59 are shown in FIG.
The drive gears 321 and 322 connected to the gear 53 via the toothed belt 337 as shown in FIG.

As described above, the cassette holder 2
5 moves in an L-shape as can be seen from the fact that the guide pin 33 moves along the L-shaped guide groove 41, for example. Therefore, the distance between the support shaft 55 and the support shafts of the gears 321 and 322 changes. Therefore, in order to prevent the toothed belt 337 from loosening, gears 323 and 324 that move according to the looseness of the belt 337 are provided to absorb the looseness, as shown in FIG. That is, the gears 323 and 324 are provided at both ends of the rotation lever 325, and the rotation lever 325 is provided in the spring 3.
A rotating force is applied around the support shaft 327 by 26 to constantly apply tension to the toothed belt 337 to prevent loosening.

Now, when the sub-board 59 is pushed up in this way, the tape guides 63 and 65 shown in FIG. 3 or 4 enter the notches 106 and 108 of the small cassette 101, respectively, as shown in FIG. Shown in. That is, the small cassette 101 inserted into the cassette holder 25 as described above is at the position of the phantom diagram shown by the alternate long and short dash line, and when the sub-board 59 is pushed up as described above, it is planted at the tips of the rotating levers 62 and 64. The tape guides 63 and 65 as shown in the drawing.
Get in.

In such a state, the standard cassette 1
The cassette loading gears 47 and 48 shown in FIG. 2 are driven to move the cassette holder 25 in the same manner as described in the case of insertion. Here, when the cassette holder 25 is moving in the cassette insertion direction, the gears 66 and 85 move to the rack 45 on the rack plates 43 and 44, respectively.
By the action of and 46, it receives a rotational force and rotates. The rotation of the gear 66 is sequentially transmitted to the gears 67 to 70, and the rotation lever 62 is rotated clockwise in FIG. 3 or 4. Further, the rotation of the gear 85 causes the rotating lever 64 to rotate counterclockwise. When the cassette holder 25 reaches the final point of movement in the cassette insertion direction, the rotary levers 62 and 64
Have moved to the positions of the phantom diagram indicated by the alternate long and short dash line in FIG. By such movements of the rotating levers 62 and 64, as shown in FIG. 4, the magnetic tape 109 (two-dot chain line) in the small cassette 101 is pulled out by the tape guides 63 and 65 to the position shown by the one-dot chain line. From the final point, the cassette holder 25 further moves downward together with the sub-board 59 (the teeth of the gears 66 and 85 also move downwards along the racks 45 and 46, respectively), and the same normal operation as described in the case of the standard cassette 1 is performed. Move to the loading position of. In this state, the small cassette 1
The magnetic tape 109 drawn out from 01 is at the same position as when the standard cassette 1 is loaded, that is, the standard cassette 1 as shown by the phantom diagram in broken lines as shown in FIG.
Is the same as when you loaded.

When pulling out the magnetic tape 109 from the small cassette 101 as described above, it is necessary to release the brake (not shown) provided on the flange of the take-up reel 102 in the small cassette 101. To do so. As shown in FIG. 3 or FIG.
7 is provided, and when the sub-board 59 approaches the cassette holder 25, the pin 87 makes the hole 3 provided in the cassette holder 25.
34 (see FIG. 9) and penetrates into a brake release hole (not shown) provided on the lower surface of the small cassette 101. The pin 87 thus inserted releases the brake on the flange of the take-up reel 102. The pin 87 is movably inserted into the hole of the sub-board 59 as shown in FIG. 12, and is pushed upward by the spring 345. FIG. 12 shows the case where the sub-board 59 approaches the cassette holder 25, and when it does not approach, the pin 87 is used.
Does not protrude from the hole 334 of the cassette holder 25. The spring 345 is provided because, when the standard cassette 1 is loaded, the pin 87 abuts the lower surface of the standard cassette 1 when the sub-board 59 approaches the cassette holder 25 (the standard cassette 1 has a hole at this portion). (Not provided), so
This is to escape this. The recess at the bottom of the pin 87 is for fitting a positioning pin (not shown) provided in the magnetic recording / reproducing apparatus main body when the cassette holder 25 reaches the regular loading position.

In this way, when the small cassette 101 is loaded in the regular loading position, the supply reel stand 19 of the magnetic recording / reproducing apparatus main body penetrates the hole 61 of the sub-board 59 and the hole 57 of the cassette holder 25, Small cassette 1
01 is fitted to the hub of the supply reel 103. On the other hand, the take-up reel base 18 of the magnetic recording / reproducing apparatus body is also the sub-board 59.
Through the hole 60 of the cassette holder 25 and the hole 56 of the cassette holder 25 to project into the cassette holder 25. However, since the small cassette 101 does not exist in this portion, the small cassette 101
The connection with the take-up reel 102 is performed as follows.
That is, when the sub-board 59 approaches the lower surface of the cassette holder 25, the gear 82 pushed upward on the sub-board 59 penetrates the hole 335 of the cassette holder 25 and projects into the cassette holder 25, as shown in FIG. Gear 8 as shown
2 is connected to a gear 111 provided on the flange of the take-up reel 102 of the small cassette 101. Further, the gear 81 directly connected to the gear 82 is connected to the gear 341 directly connected to the take-up reel stand 18 of the magnetic recording / reproducing apparatus main body. In this way, the take-up reel stand 18 and the take-up reel 102 are engaged with each other.

In such a state, the rotating lever 84 shown in FIG. 3 or 4 is provided with a spring 89 around the support shaft 88.
It is in a position rotated counterclockwise against. That is, when the turning lever 62 is turned toward the position indicated by the alternate long and short dash line or the broken line shown in FIG. Cam 8
When 6 contacts one end of the turning lever 84, the turning lever 84 is rotated. Therefore, the gears 72 and 78 held by the rotating lever 84 also move and separate from the gears 71 and 79, respectively. By doing so, the take-up reel stand 18 of the magnetic recording / reproducing apparatus main body is driven in the same manner as in the case of loading the standard cassette 1 to drive the take-up reel 102 of the small cassette 101 via the gears 81 and 82. It becomes possible to do. The gears 79 and 80 are always driven, but this is not a problem because the load is small. Needless to say, the gears 79 and 80 may be configured to move together with the turning lever 84.

When the small cassette 101 is loaded as described above, it becomes as if the standard cassette 1 was loaded, so that loading, recording / reproduction, etc. can be performed in the same manner as in the case of the standard cassette 1.

Next, the case where the small cassette 101 is taken out will be described. First, in the same manner as in the case of the standard cassette 1, the magnetic tape 109 is unloaded and the take-up reel base 18 or the supply reel base 1 of the magnetic recording / reproducing apparatus main body until the magnetic tape 109 reaches the position of the alternate long and short dash line in FIG.
9 (or both) is driven to be wound into the small cassette 101. Then cassette loading gears 47 and 4
8 is rotated in the opposite direction to that when the cassette is loaded, and the guide pins 33 and 333 are moved to the L-shaped guide grooves 41 and 441.
When the cassette holder 25 is moved along with, the cassette holder 25 is moved together with the sub-board 59 in the direction opposite to that when the small cassette 101 is loaded and returned to the original position. In this process, the gears 66 and 85 of the sub-board 59 first rise together with the sub-board 59 along the racks 45 and 46, and then the action of the racks 45 and 46 causes the gears 66 and 85 to be opposite to the above (when the cassette is inserted). Can be rotated in the direction. By these rotations, the rotating levers 62 and 64 are also rotated from the position indicated by the alternate long and short dash line in FIG.

At this time, the magnetic tape 109 also needs to be wound into the small cassette 101, but it is wound as follows. That is, when the rotation lever 62 is rotated slightly toward the original position from the position indicated by the one-dot chain line in FIG. 4, the cam 86 is separated from the rotation lever 84, so that the rotation lever 84 is restored by the restoring force of the spring 89. Position (shown in FIG. 4). Therefore, the gear 72 engages with the gear 71, and the gear 78 engages with the gear 79.

Therefore, when the sub-board 59 moves toward the original position as described above, the rotational force given to the gear 66 by the action of the rack 45 is gear 67 → gear 68 → gear 69 →
Gear 70 → Gear 71 → Gear 72 → Pulley 73 → Belt 7
6-pulley 74-pulley 75-belt 77-pulley 94
→ gear 78 → gear 79 → gear 80 → gear 81 → gear 82
→ Transmitted to the gear 111 through the path of the gear 111 on the flange of the take-up reel 102. As a result, as the gears 66 and 85 rotate and the rotary levers 62 and 64 return to their original positions, the gear 111 also rotates, and the magnetic tape 109 is wound onto the winding reel 102. In this way, the magnetic tape 109 is wound up to the original position shown by the chain double-dashed line in FIG.

In the above state, the cams 51 and 52 are driven in the opposite direction to the sub-board 59.
Is returned downward to the original position by the cassette holder 25 by the restoring force of the spring 302 or the like. As a result, the tape guides 63 and 65 are moved below the notches 106 and 108 of the small cassette 101 to be exposed to the outside, the gear 82 is also moved downward and separated from the gear 111, and the pin 87 is also moved downward. Away from the small cassette 101. At this time, similarly to the case of the standard cassette 1, the door 23 is opened by a mechanism (not shown) so that the small cassette 101 can be taken out. In the process of taking out the small cassette 101, the rotating lever 3 shown in FIG.
The opening / closing lid 110 is closed again as indicated by an arrow Q in FIG. That is, in FIG. 7, the small cassette 101
When is pulled out, the protrusion of the rotating lever 316 abuts against the end of the opening / closing lid 110, and closes the opening / closing lid 110 in the direction of arrow Q shown by the broken line. When the small cassette 101 is removed from the cassette insertion opening 21, the door 23 is closed again. In this way, each unit returns to its original state.

As described above, according to the magnetic recording / reproducing apparatus of the present invention, both the standard cassette 1 and the small cassette 101 can be applied. Of course, the cassette adapter 201 can also be applied.

In the above embodiment, the guide plates 27 and 28 are shown to move in the vertical direction, but they are attached to the top surface of the cassette holder 25 by the hinge mechanism, and the second link 2 is attached.
According to the movement of 6, the guide plates 27, 28 may be configured to be perpendicular to or parallel to the top surface, that is, to be rotationally moved in a double door shape.

[0047]

As described above, according to the present invention, it is possible to selectively load a small cassette or a standard cassette.

[Brief description of drawings]

FIG. 1 is an external front view showing a magnetic recording / reproducing apparatus according to an embodiment of the present invention.

FIG. 2 is an exploded view showing the structure of the cassette mounting portion of FIG.

FIG. 3 is a diagram showing a structure of a sub-board portion.

FIG. 4 is a top view of FIG. 3;

FIG. 5 is a diagram showing a state in which the cassette holder and the sub-board are combined.

FIG. 6 is a view showing a mechanism for moving a guide plate up and down.

FIG. 7 is a diagram showing an opening / closing mechanism of an opening / closing lid of a small cassette.

FIG. 8 is a diagram showing a drive mechanism of a cam.

FIG. 9 is a diagram showing a relationship between a cassette holder and a tape guide.

FIG. 10 is a view showing a state in which a take-up reel base and a take-up reel are coupled via a gear.

FIG. 11 is a diagram showing a structure of a winding gear portion.

FIG. 12 is a diagram showing a structure of an unlocking pin portion.

FIG. 13 is a diagram showing structures of a door portion and a guide portion.

FIG. 14 is a diagram showing an example of a conventional magnetic recording / reproducing apparatus.

FIG. 15 is a diagram showing a small cassette.

FIG. 16 is a diagram showing a small cassette and a cassette adapter.

FIG. 17 is a diagram showing a state of a small cassette housed in a cassette adapter.

[Explanation of symbols]

 1 Standard Cassette 10 Magnetic Recording / Reproducing Device 18 Take-up Reel Stand 21 Cassette Insertion Port 22 Door 23 Door 25 Cassette Holder 26 Second Link 36 First Link 27 Guide Plate 28 Guide Plate 43 Rack Plate 44 Rack Plate 45 Rack 46 Rack 51 cam 52 cam 59 sub board 63 tape guide 65 tape guide 101 small cassette 102 take-up reel 109 magnetic tape 310 turning lever 311 turning lever 350 turning lever 351 turning lever 352 lock lever 353 guide 354 guide

Claims (4)

(57) [Claims] 1. A magnetic recording / reproducing apparatus for selectively recording or reproducing a small cassette or a standard cassette in a cassette holder, wherein a rotary lever for detecting the presence / absence of a standard cassette in the cassette holder portion. And a link mechanism that moves according to the movement of the rotating lever when a standard cassette is detected by the rotating lever, and guides the small cassette when the small cassette is inserted, and passes the standard cassette in conjunction with the link mechanism. A magnetic recording / reproducing apparatus having a guide plate that moves to a position outside the path. 2. A first link having a guide plate disposed on an upper surface side of a passage path of a standard cassette, and a link mechanism having a pivot fulcrum on a cassette holder, and a pivot fulcrum on a part of the first link. 2. The magnetic recording / reproducing apparatus according to claim 1, further comprising a second link for moving the guide plate to the upper surface side of the standard cassette. 3. The magnetic recording / reproducing apparatus according to claim 1, wherein the guide plate is moved to a position where it abuts at least a side surface portion of the small cassette. 4. A cassette lid opening / closing member for moving with the guide plate and for opening or closing the lid of the cassette while the small cassette is moving along the guide plate is provided in the vicinity of the guide plate. The magnetic recording / reproducing apparatus according to claim 1, which is characterized in that.