JPH0546627B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a mechanism of a brake section of a reel stand of a recording/reproducing apparatus such as a magnetic recording/reproducing apparatus.

[Background of the invention]

In conventional recording and reproducing apparatuses of this kind, tape slack removal during unloading is performed as described in Japanese Patent Publication No. 57-38980, for example.
A brake lever driven by a plunger or cam is brought into pressure contact with the take-up reel to stop the take-up reel, and the supply reel is driven by a motor or the like to wind the tape, thereby eliminating slack in the tape. I'm trying to prevent it from happening.

However, in the configuration using the conventional brake lever described above, it is necessary to add a plunger for driving the brake or to provide a new slider or lever to transmit the driving force of the plunger or cam to the brake lever, which increases the number of parts. This has led to problems in that the size and weight of the device have increased, hindering efforts to reduce the size, weight, and cost of the device.

[Purpose of the invention]

The present invention has been made to solve the above-mentioned problems, and its purpose is to provide a small, lightweight, and low-cost recording and reproducing device equipped with a reel stand brake member of a simple structure.

[Summary of the invention]

In order to achieve the above object, the present invention includes a main board (corresponding embodiment code 1) to which a rotating cylinder device is attached, and a reel stand (corresponding embodiment code 1).
8) and an auxiliary board (corresponding embodiment code 17) on which is placed and moved so as to overlap the main board, the displacement caused by the movement of the auxiliary board causes at least the contact with the reel stand. The structure includes a brake member (reference numeral 19 in the corresponding embodiment) whose contact is released.

[Embodiments of the invention]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to the drawings, the recording/reproducing apparatus of the present invention will be described in detail in the case of a magnetic recording/reproducing apparatus. FIG. 1 is a perspective view of an embodiment of a brake device used in a recording/reproducing device of the present invention, FIG. 2 is a plan view of a magnetic recording/reproducing device equipped with this brake device before the cassette is stored, and FIG. 3 4 is a plan view after the cassette is stored, FIG. 4 is a plan view with the cassette removed and the brake device is activated, and FIG. 5 is a plan view with the brake device not activated.

First, an overview of the magnetic recording/reproducing device will be explained. In the figure, 1 is a main chassis, 2 is a rotating cylinder device equipped with a magnetic head, and 3 is a cassette.
Inside the cassette 3, a supply reel 5 and a take-up reel 6 on which a magnetic tape 4 is wound are arranged parallel to the exposed tape.

Reference numeral 7 designates an entry-side guide base on which an entry-side inclined guide and guide rollers are mounted, 8 a discharge-side guide base on which an exit-side inclined guide and guide rollers are similarly mounted, and 9 a pull-out roller. These guide bases 7, 8 and rollers 9 form tape guide means.

During the loading operation, the guide base 7
and 8 and the pull-out roller 9 pull out the magnetic tape 4 from the inside of the cassette 3 and move it along a groove provided in the guide guide plate 10.

The rotary cylinder device 2 is positioned in a predetermined positional relationship near the rotary cylinder device 2.
A magnetic tape 4 is wound spirally around a predetermined angle.

11 is a tension pin that detects the tension of the magnetic tape 4 while it is running;
The tension detected by the running magnetic tape 4
The tape payout load on the supply reel 5 is controlled so that a predetermined tape tension is applied to the tape.

12 is an impedance roller for absorbing the longitudinal vibration of the magnetic tape 4; 13 and 14 are a capstan and a pinch roller for pressing and driving the magnetic tape 4; 15 is the capstan 13;
16 is a loading motor that drives the input and output guide bases 7 and 8 and the pull-out roller 9.

17 carries the cassette 3, and the main chassis 1
This is a sub-chassis configured to be movable in the direction of the rotating cylinder device 2 relative to the rotary cylinder device 2.

In a magnetic recording/reproducing device having such a structure, when installing the cassette 3 into the device,
The cassette 3 is inserted into the sub-chassis 17 so that the guide bases 7 and 8, the pull-out roller 9 and the pinch roller 14 are inserted between the magnetic tape 4 stretched on the front part of the cassette 3 at the opening of the cassette 3. It needs to be installed in

Note that the vertical length of the entire device at this point is the second
Let it be L as shown in the figure.

Next, sub chassis 17 with cassette 3 installed
is moved in the direction of the rotating cylinder device 2, and the third
Set the state as shown in the figure.

At this time, the guide base 7 on the entry side and the exit side
8 and guides such as the pull-out roller 9 are in a half-loaded state. Then, the guides inserted into the opening of the cassette 3 are pulled out of the cassette, and the rotary cylinder device 2 can be stored inside the opening of the cassette 3.

As a result, the length of the entire device in the vertical direction is
L in the figure is shortened to l in FIG. 3.

Next, a configuration in which the brake member of the present invention is applied to a magnetic recording/reproducing device will be described. 1st
In the figure, 18 is a reel stand that drives a reel (not shown) on which the magnetic tape 4 is wound in the cassette 3, 19 is a brake lever (brake member) that brakes the reel stand, and 20 is the brake. A support member 21 rotatably supports the lever 19 on the sub-chassis 17;
9 is a biasing spring that applies a braking force to the reel stand 18; 22 is a spring hooking member that supports the other end of the biasing spring on the sub-chassis 17; and 23 is a spring that is installed on the main chassis 1 and 17 is a brake release member that comes into contact with the brake lever 19 and releases the brake of the reel stand 18 when it moves in the direction of the rotary cylinder device 2.

The operation of the brake member will be described below with reference to FIGS. 4 and 5.

At the time of loading, as shown in FIG. 4, from the state in which the sub-chassis 17 protrudes from the chassis 1 before loading the cassette, the magnetic tape is removed from the cassette 3 by the movement of the input and output guide bases 7 and 8. Pull out 4.

At this point, the brake release member 23 is not in contact with the brake lever 19, so
The brake lever 19 is brought into contact with the reel stand 18 by the biasing spring 21, and the take-up reel 6
brake. Therefore, the magnetic tape 4 is pulled out from the supply reel 5 and wound around the rotary cylinder device 2.

Next, as shown in FIG. 5, when the loading is completed, the sub chassis 17 moves in the direction of the arrow a, so that the brake release member 23 erected on the main chassis 1 is moved from the brake lever 1.
9, the brake lever 19 rotates in the direction of arrow b, and releases the brake on the reel stand 18.

Thereafter, when normal recording and reproduction is stopped, the supply side and take-up side reels 5 and 6 are braked by another main brake (not shown).

Furthermore, during unloading, the reel stand 18 is braked by performing the reverse operation to the above, and the magnetic tape 4 is wound onto the supply reel 5.

In the illustrated example, the brake lever 19 is rotatably supported on the sub-chassis 17 by a support member 20,
The main chassis 1 is provided with a brake release member 23 that separates the brake lever 19 from the reel stand 18 by movement of the sub-chassis, but on the contrary, the brake lever 19 is provided on the main chassis 1, A brake release member 23 may be provided on the sub-chassis 17.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, the brake of the reel stand is driven by moving the sub-chassis on which the reel stand is mounted relative to the chassis on which the rotary cylinder device is mounted.

Therefore, there is no need to add a plunger for operating the brake lever, or to provide a slider, lever, etc. for transmitting the driving force of the plunger or cam to the brake lever.

Therefore, a braking mechanism for the reel stand during loading and unloading can be realized with a simple mechanism, which is extremely effective in reducing the size, weight, and cost of the recording/reproducing apparatus.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of a brake device for a reel stand used in a recording/reproducing apparatus according to the present invention;
Fig. 2 is a plan view of a magnetic recording/reproducing device equipped with this brake device before the cassette is stored, Fig. 3 is a plan view after the cassette is stored, and Fig. 4 shows the magnetic recording/reproducing device with the cassette removed and the brake device activated. The plan view, FIG. 5, is a plan view with the brake device inactive. 1... Main chassis, 2... Rotating cylinder device,
3...cassette, 4...magnetic tape, 7, 8, 9
... Tape guide means (roller), 17 ... Sub chassis, 18 ... Reel stand, 19 ... Brake lever, 23 ... Brake release member.

Claims (1)

[Scope of Claims] 1. In a recording/reproducing device comprising a main board to which a rotating cylinder device is attached and an auxiliary board on which a reel stand is placed and is moved so as to overlap the main board, the movement of the auxiliary board a brake member that is released from contact with at least the reel stand when displaced by;
A recording/reproducing device characterized by comprising: