JP2653373B2 - Recording and playback device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a recording / reproducing apparatus.

[0002]

2. Description of the Related Art FIG. 6 is a diagram showing the principle of a conventional tape loading method. A magnetic tape 102 of a tape cassette 101 has arrows,
, And is wound around the rotating drum 105, and recording and reproduction are performed by the rotating drum 105.

[0003] Inclined poles (not shown in FIG. 6) are provided on the loading poles 103 and 104, and a predetermined twist is applied to the magnetic tape 102 by these inclined poles.

[0004] The loading poles 103 and 104 and the inclined poles are erected on a pole base described below, and are forcibly moved via the pole base.

FIG. 7 is a layout view of a conventional pole base. A loading pole 104 and an inclined pole 108 are juxtaposed on a boat-shaped right pole base 107.

The chassis 110 has rail grooves 111 and 112.
The left and right pole bases 106 and 107 move along these rail grooves 111 and 112.
Since the right and left pole bases 106 and 107 operate almost symmetrically , the right pole base 107 will be mainly described below.
A description of the left pole base 106 will be omitted. The right pole base 107 projects the front boss 113 downward, and pushes and pulls the front boss 113 with a V-shaped link (see FIG. 8).

By the way, in FIG. 7, positions A, B, C
The position of the pole base 107 is shown at the position A. In the position A, it is necessary to arrange the inclined pole 108 and the loading pole 104 substantially in series substantially toward the center of the rotating drum 105.

Position B is a standard tape cassette 115
Is a position where the magnetic tape 116 is pulled out.
In order to fit in the space on the back side of the vehicle, the inclined pole 108 and the loading pole 104 need to be arranged substantially side by side.

Position C is a small tape cassette 117
A position to draw the magnetic tape 118, likewise inclined
It is desirable that the pole 108 and the loading pole 104 are arranged side by side.

On the other hand, the right pole base 107 is mounted on the front boss 11.
3 and a boss 114 extending below the loading pole 104 and a rail boss 112.
Therefore, the locus of the rail groove 112 is necessarily as shown in FIG.

[0011]

FIG. 8 is a view of a link corresponding to FIG. 7, and the link 120 is sufficiently extended to maintain the position A in FIG. Right pole base
107 is pressed strongly in the direction of the arrow. On the other hand, the inclined pole 108 and the loading pole 104 are
18 is hanging as shown in the figure, but since there is almost no component force in the direction perpendicular to the arrow, the right pole base 107
There is a problem in that the vehicle swings or turns.

[0012] In this case, stable recording and reproduction cannot be expected. Therefore, there is a plan to fix the pole base 107 at the position A by an appropriate lock means.
There is also a disadvantage that the motor torque for loading increases.

There is a plan as shown in the following figure for this inconvenience. FIG. 9 is a diagram showing a modification of FIG.
The right pole base 107 is tilted more counterclockwise.

As a result, the force f1 in the direction of the arrow is divided into f2 and f3, as shown in the component line diagram at the top of the figure, and the strength around the arrow is dramatically improved, which is preferable.

However, since the angle between the inclined pole 108 and the loading pole 104 is determined with respect to the rotating drum 105 (same as in FIG. 7), the line connecting the inclined pole 108, the loading pole 104, and the front boss 113 is substantially perpendicular. become.

As a result, at the position B, the inclined pole 108 comes very close to the magnetic tape 116, and at the position C, the inclined pole 108 completely interferes with the magnetic tape 118.

That is, the right pole base 10 at the position A
If 7 is set to the direction of FIG. 9, at least one of the positions B and C becomes unsatisfactory, so that the form of FIG. 7 is unavoidable.

Accordingly, an object of the present invention is to provide a large cassette and a small cassette.
Standard and small tape cassettes ( 2nd, 2nd
Position B as third position, corresponding to the C), and the
The object of the present invention is to provide a structure in which the pole base is sufficiently stabilized at the position A as the position 1 .

[0019]

[ MEANS FOR SOLVING THE PROBLEMS]
Claim 1 is that the loaded large cassette or small cassette
Pull out the tape and wind it around the rotating drum over a predetermined range.
And a loading pole with
Movable tilt and loading poles
Place the pole base for support and this pole base
Front and rear bosses provided to move a fixed orbit, and this
Record consisting of guide grooves for guiding the front and rear bosses
A reproducing apparatus, wherein a magnetic tape is placed on a rotating drum in a predetermined range.
Pole and loading pole wrapped around
The position of the Le a first position, the magnetic tape in the large cassette Tsu DOO
Of the inclined pole and the loading pole
The position is the second position and the magnetic tape in the small cassette is
Position of inclined pole and loading pole for drawing
Is referred to as the third position, the guide groove is moved to the first position.
The straight line connecting the inclined pole and the loading pole
Regulate front and rear bosses to be almost perpendicular to the rotation axis of the drum
In one groove, and at the second and third positions,
The straight line that connects the
It should be almost parallel to the magnetic tape stretched on the front of the small cassette.
Two forks that regulate the front and rear boss respectively
The recording / reproducing apparatus is constituted by the grooves of FIG. Claim 2
The rear boss has a shorter front boss than the rear boss.
The front boss enters one of the two grooves and the other
A front boss is inserted at the entrance of the one groove so that the rear boss enters the groove.
To prevent the entry of rear boss
In the direction that the front boss faces one of the grooves.
Recorder with correction pin for turning the pole base
It is a raw device.

[0020]

In the first position, one of the guide grooves is inserted into the front and rear grooves.
And connecting the inclined pole to the loading pole
The straight line is substantially perpendicular to the rotation axis of the rotating drum, and the second and third
In the position, the front and rear are divided into two grooves that branch the guide groove
The bosses are fitted to each other,
The straight line connecting to the magnetic tape of the large or small cassette
Should be almost parallel to the loop. Therefore, when recording / reproducing,
In the first position, which is the position of the pole,
Can prevent and maintain stable, magnetic tape
In the second and third positions, which are the withdrawal positions, the large cassette or
Is to rotate the pole base for the small cassette
With large cassette or small cassette magnetic tape and inclined pole
Does not interfere. Advance the front boss into one groove with a baffle plate
To prevent the rear boss from entering
Turn the pole base and enter the front boss into one groove
And make the rear boss enter the other groove. Therefore, the front boss
The rear boss in one groove is securely drafted in the other groove with a simple mechanism.
Inside.

[0021]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a plan view of a recording / reproducing apparatus according to the present invention. In a magnetic recording / reproducing apparatus 1 such as a tape deck, an arc-shaped flat plate called a sub-chassis 4 is provided on the chassis 2 on the right of a rotating drum 3. The sub-chassis 4 is provided with a rail groove 5 as a guide groove . Reference numeral 3a denotes a rotation shaft of the rotating drum 3.

The rail groove 5 is a rail 5a as a single groove at a position A in the drawing, and one of two substantially parallel grooves 5b and 5b at positions B and C.
And a rail 5c , which is the other groove, and one of them is divided (or divided) into two at a point 5d on the way. The right pole base 7 is fitted in the rail groove 5 having the above configuration.

The right pole base 7 has a loading pole 8 and an inclined pole 9 standing substantially at the center, and has a front boss 10 and a rear boss 11 protruding downward. The right pole base 7 is driven by a link 13 similar to that described in the related art, and the link 13 is connected to the rear boss 11.

A pole base correction pin 1 for correcting the direction of the right pole base 7 is provided on the right side of the sub chassis 4 in the figure.
5 is erected, and a baffle plate 16 is erected on the chassis 2 (well below the sub-chassis 4). These correction pins 1
The operation of 5 and baffle 16 will be described later.

FIG. 2 is a cross-sectional view of the right pole base of the present invention. The front boss 10 has a small protrusion to the side from the sub-chassis 4, while the rear boss 11 has a long length extending to the vicinity of the chassis 2. It has been.

Returning to FIG. 1, the left pole base 18 will be described. A left rail groove 19 and a left rail ridge 20 are formed on the chassis 2 at the left side of the rotating drum 3 in parallel with each other, though at irregular intervals. However, the left rail groove 19 is engraved on the chassis 2 and the left rail ridge 20 is adhered on the chassis 2 and has different levels.

The left pole base 18 has a loading pole 21 and an inclined pole 22 erected on the upper surface thereof and projects the rear boss 23 downward. However, the front boss is different from the fixed front boss 10 of the right pole base 7. The left pole base 18 includes a floating boss 24 that can move by the length of the long hole 18 a, and a left pole base tip end fork 25 that straddles the left rail ridge 20.

The operation of the recording / reproducing apparatus having the above configuration will be described below. FIG. 3 is a diagram for explaining the operation of the recording / reproducing apparatus according to the present invention.
And from the point 5d, the front boss 10 travels on the rail 5b and the rear boss 11 travels on the rail 5c from the point 5d, so that the inclined pole 9 and the loading pole 8 at the positions B and C have extremely favorable directions. Is done. At the point 5d, it is necessary to prevent the front and rear bosses 10, 11 from entering the rail 5b or the rail 5c. This will be described later.

There is no obstacle that the right pole base 7 moves in the order of position A → position B → position C.

On the other hand, the left pole base 18 is in the position C
In the above, the rear boss 23 is fitted in the left rail groove 19, and the fork 25 is straddling the left rail ridge 20, so that the posture is determined. The same applies to the position B, and the orientations of the inclined pole 22 and the loading pole 21 are both preferred.

The left pole base 18 is guided by the left rail groove 19 and the left ridge 20 to move from position C to position B.
→ Move to position A, but just before position A,
Because the left rail ridge 20 is narrow, the fork 25
Is weakened, and the left pole base 18 is positioned at the position A by the base catcher 26 and the rear boss 23. On the way, the floating boss 2
4 does not hinder the operation because it moves within the range of the long hole 18a.

Since the fork 25 has no function of preventing the floating, the floating boss 24 prevents the left pole base 18 from lifting.

FIG. 4 is an operation diagram of the right pole base. The right pole base 7 moving as shown by the arrow is attached to the rear boss 11.
Is guided by the baffle plate 16 and enters the rail 5c without reaching the rail 5b and reaches the position E.

At this position E, the right pole base 7 is turned counterclockwise by the correction pin 15 so that the front boss 10 enters the rail groove 5b. The front boss 10 passes above the baffle 16 because of its short length. In this way, the right boss 7 correctly moves the front boss 10 on the rail 5b and the rear boss 11 on the rail 5c.

FIG. 5 is a component line diagram of the pole base of the present invention. In the position A, the pressing force F1 of the link 13 against the right pole base 7 is divided as F2 and F3.
The inclined pole 9 and the loading pole 8 are made of magnetic tape.
116 or tension of the magnetic tape 118 is applied, if the component force F3 is suppressed it if the right pole base 7 is rotated or vibrates in F2 axis around, right pole base 7 is F
When rotating around three axes, the component force F2 suppresses it.

Therefore, the right pole base 7 is sufficiently stable. Although not described in detail, the same applies to the left pole base 18.

[0038]

As described above, the first aspect of the present invention relates to the loading
Magnetic tape from the large cassette or small cassette
Inclination to wind around the rotating drum over a predetermined range
Poles and loading poles and their inclined poles
And a port for movably supporting the loading pole.
And the pole base on a predetermined track
The front and rear bosses provided for
A recording / reproducing device comprising a guide groove for guiding
And wind the magnetic tape around the rotating drum over a predetermined range.
Position the attached tilt pole and loading pole first.
Position and to pull out the magnetic tape in the large cassette
The position of the tilt pole and loading pole of the second position
Position and tilt for pulling out the magnetic tape in the small cassette.
The position of the oblique pole and the loading pole is the third position
When calling, the guide groove is placed in the first position on the inclined pole
The straight line connecting to the loading pole is the rotation of the rotating drum.
One groove that regulates the front and rear bosses so as to be substantially perpendicular to the axis, and
One, the second and third positions, tilt pole and rodin
The straight line connecting Gpole is in front of the large cassette or small cassette
Front and rear bosses to be almost parallel to the magnetic tape stretched on the surface
It is composed of two grooves that are bifurcated to regulate each
It is a recording and reproducing device. Pole base position during recording / playback
In the first position, which prevents the pole base from swinging
Stable holding and magnetic tape pull-out position
In the second and third positions, the large cassette or the small cassette
Rotate the pole base in response to the
The magnetic tape of the cassette or small cassette interferes with the inclined pole
Never.

The front and rear bosses are more preferable than the rear bosses.
The front boss is made shorter and one of the two guide grooves
The front boss enters the groove and the rear boss enters the other groove.
To allow the front boss to enter the entrance of the one groove
A baffle is provided to prevent the rear boss from entering, and
Turn the pole base in the direction that the front boss faces one groove
This is a recording / reproducing apparatus provided with a correction pin for performing the correction. Front boss
The rear boss in one groove is securely drafted in the other groove with a simple mechanism.
Inside .

[Brief description of the drawings]

FIG. 1 is a plan view of a recording / reproducing apparatus according to the present invention.

FIG. 2 is a sectional view of a right pole base of the present invention.

FIG. 3 is an explanatory diagram of an operation of the recording / reproducing apparatus of the present invention.

FIG. 4 is an operation diagram of the right pole base of the present invention.

FIG. 5 is a component force diagram of the pole base of the present invention.

FIG. 6 is a diagram showing the principle of conventional tape loading.

FIG. 7 is a layout view of a conventional pole base.

FIG. 8 is a diagram of a link corresponding to FIG. 7;

FIG. 9 is a diagram showing a modification of FIG. 7;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Magnetic recording / reproducing apparatus, 2 ... Chassis, 3 ... Rotating drum,
3a: rotating shaft, 4: subchassis, 5: guide groove (rail)
Groove) , 5a, 5b, 5c Groove (rail) , 7 Right pole base, 10 Front boss, 11 Rear boss, 15 Pole base corrector pin, 16 Baffle plate, 18 Left pole base, 19 … Left rail groove, 20… left rail ridge, 115…
Large cassette (standard tape cassette), 116 ... magnetic tape
117, small cassette (small tape cassette), 11
8. Magnetic tape .

Claims (2)

(57) [Claims] 1. From a loaded large cassette or small cassette
Pull out the magnetic tape and place it on the rotating drum over a predetermined range.
Inclined pole and loading pole for winding
And move these inclined poles and loading poles
A pole base to support as much as possible and this pole base
Front and rear bosses to move
And the guide grooves for guiding these front and rear bosses
A magnetic tape wound around a rotary drum over a predetermined range.
The positions of the inclined pole and loading pole
Pull the magnetic tape in the first position and the large cassette.
Position of the inclined pole and loading pole for putting out
The second position and the magnetic tape in the small cassette
The tilting pole and loading pole for pulling out
When the position is referred to as a third position, the guide groove is provided at the first position in the inclined pole.
And the straight line connecting the loading pole
One of the front and rear bosses that regulates the front and rear bosses so that they
A groove, and the inclined at the second and third positions.
The straight line connecting the inclined pole and the loading pole is
Abbreviated on magnetic tape stretched on the front of a set or small cassette
In the fork that regulates each of the front and rear bosses so that they are parallel
Recording / reproducing device characterized by two branched grooves
Place. 2. The front and rear bosses are more front bosses than rear bosses.
And one of the two grooves of the guide groove
The front boss into the other groove and the rear boss into the other groove.
A baffle plate is provided at the entrance of the one groove to allow entry of the front boss and prevent entry of the rear boss, and to rotate the pole base in a direction in which the front boss faces one groove. 2. The recording / reproducing apparatus according to claim 1, further comprising a correction pin.