JPH0444821B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application] The present invention relates to a magnetic recording/reproducing device, and particularly to a cassette holding device suitable for downsizing the device.

[Background] FIG. 1 shows a plan view of an example of a conventional magnetic recording/reproducing device.

In the figure, 1 is a rotary cylinder on which a magnetic head is mounted, and 2 is a cassette. Reference numerals 2a and 2b are a supply reel and a take-up reel on which the magnetic tape 3 is wound within the cassette 2. Reference numeral 4 designates an entrance guide base on which an entrance inclined guide and guide rollers are mounted, and 5 designates an exit guide base having a similar shape. 6 and 7 are racks, 8 is a rack drive gear, 9 is a chassis, 10 and 11 are holding members (catches),
12 is a rack spring, and 31 is an impedance roller for absorbing minute vibrations of the running magnetic tape.

The entry guide base 4 and the exit guide base 5 are each connected to racks 6 and 7 made of a flexible material via rack springs 12. When the rack drive gear 8 rotates clockwise as indicated by arrow A, the rack 6 is driven to the right as indicated by arrow C, and the rack 7 is driven to the left as indicated by arrow B. As the racks 6 and 7 move, the input guide base 4 and the output guide base 5 also move, so that the magnetic tape 3 is pulled out from the cassette 2 by the guide bases 4 and 5. Finally, the guide bases 4 and 5 are held by holding members 10 and 11, respectively, and the magnetic tape 3 is mounted on the cylinder 1 equipped with a magnetic head.

In the conventional magnetic recording and reproducing device described above,
The rotating cylinder 1 is arranged at a position where the tape 3 stretched on the frontmost part of the opening of the cassette does not come into contact with the cassette 2 when it is installed. For this reason, the overall size of the device depends on the number of cassettes used.
It is not smaller than the combination of the rotary cylinder 1 and the rotary cylinder 1, and has the disadvantage that there is a limit to miniaturization.

〔the purpose〕

SUMMARY OF THE INVENTION An object of the present invention is to provide a magnetic recording/reproducing apparatus which can eliminate the above-mentioned disadvantages of the prior art and further reduce the size of the magnetic recording/reproducing apparatus.

〔overview〕

The feature of this invention is that the determining factor for the size of the device is the parallel arrangement of the cylinder and cassette, and in the process of installing the cassette into the magnetic recording/reproducing device, the cassette position is moved toward the cylinder, and the cassette opening is Store parts such as cylinders inside the unit,
The point is that the device is made smaller when it is in an operating state.

〔Example〕

The present invention will be explained below with reference to Examples. FIG. 2 shows a perspective view of the main parts of an embodiment of the present invention. Incidentally, FIG. 2 shows the state when a cassette is installed in the magnetic recording/reproducing apparatus of this embodiment.

In the figure, 21 is a chassis, 22 is a rotating cylinder on which a magnetic head is mounted, and 23 is a cassette placed on a cassette holder (not shown). 24 represents a magnetic tape, 25 represents a supply reel on which the magnetic tape 4 is wound, and 26 represents a take-up reel. Moreover, 27 shows an entry side guide base on which an entry side inclined guide and a guide roller are mounted, and 28 shows an exit side guide base having a similar structure.

Furthermore, 29 is a drawer guide guide plate, 30 is a tension pin that detects the tension of the running magnetic tape, and 32 is a pinch roller that is pressed against the capstan and conveys the magnetic tape during recording and reproduction.
Further, 33 is a guide moving arm, 34 is a guide moving arm connecting pin, and 35 is a guide moving ring.

As is clear from FIG. 2, the feature of this embodiment is that when the cassette is attached to the cassette holder,
The cassette holder is configured so that a portion thereof protrudes from the chassis 21.

FIG. 3 is a perspective view for explaining the cassette holder 36 in more detail. In the figure, 37
is a reel stand, 38 is a brake for the reel stand, 39
is the plunger for the reel stand brake.

The cassette holder 36 has L-shaped bent portions 36a and 36b at both left and right ends. On the other hand, the chassis 21 has the L-shaped bent portion 36a,
36b has U-shaped grooves 21a and 21b facing each other. Therefore, the L-shaped bent portions 36a and 36b of the cassette holder 36 are connected to the U-shaped groove 2.
1a and 21b, and is movable in the direction of arrow B, that is, in the direction of the rotating cylinder 22 in FIG.

Note that if the reel stand 37 is driven by a motor direct drive system, when moving the cassette holder 36 in the direction of arrow B,
The structure of the drive of the reel stand becomes simple. In this case, as is well known, a motor (not shown) is attached to the lower part of the reel stand 37.

Next, the operation when loading the cassette into the magnetic reproducing device will be explained with reference to FIGS. 4a to 4c. Note that FIG. 4 shows a right side view of FIG. 2. In the figure,
40a and 40b are pins for positioning the cassette 23, 41 is a motor, and other symbols are the same as or equivalent to those in FIGS. 2 and 3.

In FIG. 4a, the cassette 23 has its lid 23
It descends in the direction of arrow A with a opened.
At this time, the cassette 23 is moved by the cassette positioning pins 40a and 40 provided on the cassette holder 36.
0b, and placed on the reel stand 37 as shown in FIG.
Next, the cassette holder 36 is manually moved in the direction of arrow B. As a result, the front end 23b of the cassette 23, that is, the end on the side where the magnetic tape is exposed, reaches near the center axis of the rotary cylinder 22, as shown in FIG. become. As the means for moving the cassette holder 36, in addition to manual means, a plunger or motor driven by a spring force or electrically may be used.

The length L in FIG. 4a represents the size of the conventional device, and the length ι in FIG. 4c represents the size of the device according to this embodiment. As is clear from these figures, it can be seen that the device of this embodiment is smaller in size by length a compared to the conventional device.

FIG. 5 is a plan view of the magnetic reproducing device corresponding to FIG. 4c. In the figure, 42 indicates a capstan, 43 indicates an audio magnetic head, and other symbols indicate the same or equivalent parts as in FIGS. 2 and 4.

It will be clear from FIG. 5 that the cassette 3 is carried to a position where its opening encloses a portion of the rotary cylinder 22. Further, for this reason, the length in the vertical direction of the chassis 21 of the magnetic recording/reproducing device can be reduced to the above-mentioned length ι.

FIG. 6 is an explanatory view of parts that move under force from the ends of the cassette holder when the cassette and cassette holder are moved in the direction of arrow B, as explained in FIG. 4c. Note that FIG. 6 shows a sectional view taken along the line -- in FIG. 2.

In the figure, 44 is an arm biasing spring, 36c
28a represents the tip of the cassette holder 36, 28a represents the end surface of the outlet guide base 28, and other symbols are the same as or equivalent to those in FIG. 2.

As shown, the tip 36c of the cassette holder 36 and the end surface 28 of the exit guide base 28
a are in contact with each other, so when the cassette holder 36 is moved in the direction of arrow B as described above, it is biased in the direction of arrow d (counterclockwise) by the arm biasing spring 44. Exit guide base 2
8 rotates clockwise around the arm connecting pin 34 for guide movement. Similarly, although not shown, the entrance guide base 27 and the pinch roller 3
2 is also rotated clockwise as the cassette holder 36 advances. Arrow c in FIG. 2 indicates the direction of this rotation.

When the cassette 23 and cassette holder 36 are advanced to the position shown in FIG. 5, their advancement is stopped. FIG. 7 shows a plan view of the magnetic reproducing device when the loading operation is then completed and the loading is completed. In the figure, 45a,
45b indicates a holding member (catcher), and other symbols indicate the same or equivalent components as in FIG. 5.

At the start of loading, a driving means (not shown) for loading starts operating, and the entry guide base 27 and the exit guide base 28 receive power from the driving means and rotate clockwise and around the rotating cylinder 22, respectively. Move counterclockwise. At this time, the magnetic tape 24 is pulled toward the rotating cylinder 22 by the inclined guides on the guide bases 27 and 28 and the guide rollers.
When the guide bases 27 and 28 come into contact with the holding members 45a and 45b, respectively, the magnetic tape 24
is wound helically over a predetermined angle around the rotary cylinder 22, as shown in FIG.

The guard bases 27 and 28 are attached to the holding member 4.
5a and 45b, the pinch roller 32 is in a position where it is pressed against the capstan 42, and the magnetic tape 24 is held between the pinch roller 32 and the capstan 42.

As described above, according to this embodiment, the length of the chassis of the magnetic reproducing device in the longitudinal (vertical) direction can be shortened, so that the device can be made smaller.

〔effect〕

As described above, according to the present invention, after the cassette is mounted on the cassette holder, the cassette holder is moved along the chassis in the direction of the rotating cylinder,
Since a part of the rotating cylinder is stored inside the opening of the cassette, the size of the device, which was conventionally fixed based on the size of the rotating cylinder and cassette, can be significantly reduced in size with a simple mechanism. It has the great effect of being able to

[Brief explanation of the drawing]

FIG. 1 is a plan view of a conventional magnetic recording and reproducing device, FIG. 2 is a plan view of the magnetic recording and reproducing device according to an embodiment of the present invention when a cassette is attached, and FIG. 3 is a perspective view of a cassette holder and its surroundings. 4a to 4c are side views showing the progress of loading the cassette, FIG. 5 is a plan view of the magnetic recording/reproducing apparatus after loading the cassette, FIG. 6 is a sectional view taken along the line -- in FIG. 2, and FIG. FIG. 3 is a plan view of the magnetic recording/reproducing device after loading is completed. 21... Chassis, 22... Rotating cylinder, 2
3...cassette, 24...magnetic tape, 27...
Inlet guide base, 28... Outlet guide base,
36...Cassette holder.

Claims (1)

[Scope of Claims] 1. A main board to which a rotating cylinder is attached, a tape guide means moved by a loading member and configured to wrap a tape around the outer periphery of the rotating cylinder, and a reel stand placed thereon so as to overlap the main board. In the recording and reproducing apparatus, the tape guide means is provided with a first tape guide means that is moved together with the movement of the auxiliary board.
A recording/reproducing apparatus characterized in that it has a configuration having a section and a second section moved by the loading member. 2. The recording and reproducing device according to claim 1, wherein the tape guide means moves together with the auxiliary substrate over a predetermined distance while maintaining a constant positional relationship with the auxiliary substrate in the first section. Device.