JP2002197753A - Brake of supply reel base in videocassette recorder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a brake for braking the rotation of a supply reel base in a videocassette recorder which can perform a brake operation with simple construction, without a brake lever to control the rotation of the supply reel base during unloading. SOLUTION: A band 22 is wound around a supply reel base 21, one end of the band 22 is connected with a detaining part 26 rising from a chassis, and the other end of the band 22 is connected with a connector 27 rotatably attached to an arm 23. A brake is applied to the supply reel base 21 by applying the lever 31 of the connector 27 to the outside of a coil spring 32 connected between the arm 23 and a tension lever 25 in unloading to change a direction, thereby applying moderate tension to the band 22.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a brake device for applying a brake for preventing a supply reel unit from rotating on its own in a video deck, and for applying a necessary tension when rewinding a tape. .

[0002]

2. Description of the Related Art In a video deck, when a tape is wound on a take-up reel, it is necessary to maintain an appropriate tape tension. For this purpose, the reel base is provided with a band brake to brake the rotation of the reel base. When a cassette tape is mounted on a video deck and is in an unloading state, the tape may protrude from the cassette. For example, when pulling out a cassette tape from a video deck, it is necessary to perform a pulling-out operation so that the tape is not loosened. For this purpose, a brake is applied so that the supply reel table does not rotate freely. Also, when loading the cassette tape to the break position, if the engagement between the wing portion of the reel base and the recess on the reel receiving side of the cassette tape is incomplete, the tape may protrude from the cassette.

FIG. 3 shows a conventional supply reel base braking device.
(a) shows an unloading state, and (b) shows a loading state. A band 2 is wound around the outer periphery of the supply reel base 1, one end of which is connected to a connector 3, the other end is connected to another connector 4, and both connectors 3, 4 are attached to an arm 5. Then, in the loading state, the band 2 swings around the shaft 6 as shown in FIG. 4B, and the band 2 is pulled and comes into contact with the outer periphery of the supply reel table 1 to apply a predetermined tension.

As described above, the supply reel table 1 can be braked by applying tension to the band 2 at the time of loading. However, the tip of the brake lever 7 is prevented from rotating freely during unloading. Hit band 2. That is, the coil spring 8 is attached to the brake lever 7, and the tip of the brake lever 7 is pressed by the band 2 by the spring force of the coil spring 8, and the rotation of the supply reel base 1 is regulated. Therefore, when the cassette tape is pulled out from the video deck, the pulling-out operation can be performed so that the tape is not loosened.

At the time of loading, the arm 5 swings and the cam 9 slides in the direction of the arrow, and the tension lever 10 swings in the direction of the arrow along with the slide of the cam 9, and the pin provided on the brake lever 7 is The tip of the brake lever 7 is separated from the band 2 by engaging with the cam, and the brake is released.

FIG. 4 shows the relationship between the tension lever 10, the cam 9 and the brake lever 7 separately for unloading and loading. A slider 11 provided on the tension lever 10 is formed on the cam 9. The slider at the tip of the tension lever 10 is loosely fitted in another groove 13. If the cam 9 slides leftward, the tension lever 10 can swing around the slider 11 as shown in FIG.

When the length of the band 2 wound around the supply reel table 1 is not appropriate, the brake does not work at all even in the loading state, or the brake works in the unloading state. Become. For this purpose, an adjusting screw 14 is provided on the other end of the connector 4, and the length of the band 2 can be adjusted by turning the adjusting screw 14.

However, as is apparent from FIG. 1, the braking device for the supply reel base 1 is complicated, for example, a brake lever 7 is provided in addition to the tension band 2. Therefore, the production cost is high, and the frequency of failure is high.

[0009]

As described above, the conventional supply reel base braking device has the above-mentioned problems. The problem to be solved by the present invention is this problem, and the brake of the supply reel base which can perform the brake operation with a simple structure without having a brake lever for restricting the rotation of the supply reel base during unloading. Provide equipment.

[0010]

SUMMARY OF THE INVENTION A braking device for a supply reel base according to the present invention does not include a conventional brake lever.
It is configured so that braking can be performed with a band wound around the supply reel table. Therefore, one end of the band is locked by a locking portion rising from the chassis, and the other end of the band is connected to a connector attached to the arm. A part of the connector hits a coil spring connected between the tension lever and the arm to change the direction of the connector, thereby pulling the band and applying a predetermined tension.

The tension applied to the band by the coil spring acts as a brake during unloading,
No conventional brake lever is required. The adjustment of the length of the band can be performed at a locking portion where one end of the band is locked, but the form of connection between both ends of the band is not limited. Hereinafter, embodiments according to the present invention will be described in detail with reference to the drawings.

[0012]

FIG. 1 is an embodiment showing a braking device for a supply reel base according to the present invention. In the figure, 21 is a supply reel table, 22 is a band, 23 is an arm, 24 is a cam, and 25 is a tension lever. A band 22 is wound around the supply reel table 21. One end of the band 22 is connected to a locking portion while being locked, and the other end is connected to a connector 27 attached to an arm 23.

Therefore, when loading, the arm 23 is connected to the shaft 2
8, the connector 27 rotates about the shaft 28 together with the arm 23 so that the band 2
2 is wound around the supply reel table 21 and a moderate tension is applied.
As a result, the brake operates. For that, band 22
Must be appropriate in length, for example, by twisting the locking portion 26. FIG. 2 is a specific example showing the locking portion 26, and the locking portion 26 is fitted into a slit hole 29 provided at one end of the band 22 and locked. The length of the band wound around the supply reel table 21 can be adjusted by twisting the leg 30.

However, the present invention does not limit the connection structure of the band 22, and is not limited to the case where a part of the chassis is provided upright as shown in FIG. A connector 27 for connecting the other end of the band 22 has a substantially L shape and is attached to the arm 23 at the center.
Is rotatably supported. Then, the connector 27 is pulled by the band 22 and faces in the same direction as the band 22, but in the unloading state shown in FIG.
2, the direction is changed and the band 22 is slightly bent.

As described above, when the lever 31 of the connector 27 hits the coil spring 32, its direction changes and the band 22 is pulled. As a result, the supply reel base 21 is braked by the band 22 and cannot be freely rotated. However, when the loading state shown in FIG. 1B is reached, the arm 23 rotates about the shaft 28, the tension lever 25 swings in the direction of the arrow, and the lever 31 of the connector 27 separates from the coil spring 32. The band 22 is pulled to apply an appropriate brake to the supply reel base 21.

As described above, in the supply reel braking device of the present invention, the connector for connecting the other end of the band wound around the supply reel is rotatably mounted on the arm, and is connected between the tension lever and the arm during unloading. Since a part of the connector hits the coil spring, the following effects can be obtained.

[0017]

According to the present invention, a braking device for a supply reel table according to the present invention has one end of a band wound around the supply reel table fixed to a chassis, and the other end connected to a connector attached to an arm. Therefore, in the unloading state, the lever of the connector hits the coil spring connecting the arm and the tension lever to change its direction, and as a result,
The band will be pulled slightly and the supply reel base will be braked.

Therefore, a brake lever for restricting the rotation of the supply reel table in the unloading state as in the related art is not required, and a band acting as a brake at the time of loading can be shared. Therefore, the braking device is simpler than the conventional one, and of course, the manufacturing cost is low and the number of failures is small.

[Brief description of the drawings]

FIG. 1 is an embodiment showing a supply reel base braking device of the present invention.

FIG. 2 shows a locking portion for fixing one end of a band.

FIG. 3 is a conventional supply reel table braking device.

FIG. 4 shows the relationship between a conventional tension lever, cam and brake lever.

[Explanation of symbols]

 21 Supply reel base 22 Band 23 Arm 24 Cam 25 Tension lever 26 Locking part 27 Connector 28 Axis 29 Slit hole 30 Leg 31 Lever 32 Coil spring

Claims (2)

[Claims] 1. A braking device for braking the rotation of a supply reel table in a video deck, wherein a band is wound around the supply reel table, and one end of the band is connected to a locking portion rising from a chassis, and the other end of the band. Is connected to a connector that is rotatably attached to the arm, and at the time of unloading, changes the direction of the connector by applying the lever of the connector to the outside of the coil spring that is connected between the arm and the tension lever, and to the band. A brake device for a supply reel base in a video deck, wherein a brake is applied to a supply reel base by applying an appropriate tension, and during loading, a lever of a connector is separated from a coil spring and tension is applied to a band. 2. The connector according to claim 1, wherein the shape of the connector is substantially L-shaped, and a central portion thereof is pivotally supported by an arm, a band is connected to one piece, and a lever, which is the other piece, is brought into contact with a coil spring. Braking device for supply reel base in VCR.