JP2002100084A - Reel base brake device for magnetic recording/ reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the bent deformation of a lever part for the brake of a reel base brake member. SOLUTION: The feed reel base brake member 4 is provided with a braking lever part 62 to be elastically deformable, generates a braking force by the elastic deformation of the lever part 62 when it is rotated to a feed reel base 2 side, thereby braking the feed reel base 2, and switches off the braking force when it is rotated away from the feed reel base 2. A stopper part 70 is abutted on the lever part 62 when the reel base brake member 4 is in an OFF state, thereby preventing being separated by a predetermined amount or more from the feed reel base 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reel stand brake device for a magnetic recording / reproducing apparatus which brakes a reel stand fitted with a reel of a tape cassette.

[0002]

2. Description of the Related Art Conventionally, various video tape recorders (VTRs) and audio tape recorders have been put into practical use as magnetic recording / reproducing devices for recording / reproducing magnetic tapes. In such a magnetic recording / reproducing apparatus, a brake member is provided on a supply reel and a take-up reel of a tape cassette, and in various modes such as a stop mode and a fast-forward mode, a soft state or a main state in which braking force is higher than the soft state. By applying an appropriate braking force such as that described above, the tape in the tape cassette is prevented from slackening. In this case, there is a brake member that generates a braking force by elastic deformation of the brake member for the purpose of reducing manufacturing costs.

FIG. 4 is an explanatory view showing the operation of a supply reel base brake member of such a conventional magnetic recording / reproducing apparatus. FIG. 4 (a) shows an off state, and FIG. 4 (b) shows an on state. Is shown.

In FIG. 4, a supply reel base brake member 104 is rotatable about a shaft 161 and is driven to rotate by sliding a cam slider. Supply reel base brake member 104
Is formed of an elastic member, and has a lever portion 162 for brake.

In the off state shown in FIG. 4A, a brake lever 162 of the supply reel base brake member 104 is used.
Does not contact the brake belt 110 of the supply reel base 102.

In the ON state shown in FIG. 4B, the supply reel base brake member 104 rotates to the rotation angle A0, and the brake lever 162 contacts the brake belt 110 of the supply reel base 102 and bends. , Brake belt 1
A braking force is applied to the supply reel base 102 via the control unit 10.

[0007] Such a conventional supply reel base brake member 104 is deformed by repeated operation or high temperature installation in an ON state.

FIG. 5 is an explanatory view showing such a modification of the conventional supply reel base brake member. FIG. 5 (a) shows an off state and FIG. 5 (b) shows an on state.

[0009] In the supply reel base brake member, when a repetitive operation or high-temperature installation in an ON state is performed, FIG.
As shown in (a), even when the brake is released from the brake belt 110 of the supply reel base 102, the brake lever 1
62 remains largely curved, and the braking force is reduced in the ON state of FIG.
The torque of the tape decreases, and the tape becomes easy to loosen.
The life of the magnetic recording / reproducing device was shortened.

[0010]

In the above-mentioned conventional supply reel base brake member of the magnetic recording / reproducing apparatus, the brake lever portion is greatly bent and deformed when a repetitive operation or high-temperature installation in an ON state is performed. As a result, the braking force is reduced, the torque of the supply reel base is reduced, the tape is easily loosened, and the life of the magnetic recording / reproducing apparatus is shortened.

SUMMARY OF THE INVENTION An object of the present invention is to provide a supply reel stand brake member of a magnetic recording / reproducing apparatus which can eliminate the above-mentioned problems and can reduce the bending deformation of the brake lever of the reel stand brake member. .

[0012]

According to a first aspect of the present invention, there is provided a magnetic recording / reproducing apparatus in which a tape reel is fitted with a supply reel of a tape cassette in a state where the tape cassette is loaded, and the tape cassette is loaded with the cassette. A reel base brake device used for a magnetic recording / reproducing apparatus having a take-up reel table fitted with a take-up reel of a tape cassette in a state, wherein the supply reel has an elastically deformable brake lever unit. The reel unit is provided in a rotatable state near at least one of the reel unit and the take-up reel unit, and when the reel unit rotates, a brake force is generated by elastic deformation of the lever unit to brake the reel unit. And a brake force that can be turned off when the reel rotates away from the reel base. A base brake member, characterized in that anda stopper portion to prevent the leaving more than a predetermined amount from the reel stand by contacting the lever portion at the time of off state of the reel table braking member.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show an embodiment of a reel stand brake device of a magnetic recording / reproducing apparatus according to the present invention. FIG. 1 is a plan view of the inside before tape loading as viewed from above, and FIG. It is the bottom view seen from.

Next, the overall structure will be described with reference to FIG. In FIG. 1, reference numeral 11 denotes a chassis formed by bending or pressing a metal plate. The chassis 11 has a supply reel fitted with a supply reel of the tape cassette in a state where the tape cassette is loaded in the cassette. A table 2 and a take-up reel table 3 that fits with a take-up reel of the tape cassette in a state where the tape cassette is loaded in the cassette are provided side by side. In the center of the chassis 11, a gear box 12 including five gears for rotating the supply reel base 2 and the take-up reel base 3 is provided. The gear of the gear box 12 is rotated by a capstan motor.

A supply reel stand brake member 4 is provided at a position on the supply reel stand 2 side of the gear box 12 at the back of the chassis 11.
Are provided in a rotatable state. A take-up take-up reel base brake member 5 is rotatably provided at a position on the take-up reel base 3 side of the gear box 12 at the back of the chassis 11.

The supply reel base brake member 4 has an elastically deformable brake lever portion 62. When the supply reel base brake member 4 rotates toward the supply reel base 2, the brake force is generated by the elastic deformation of the lever portion 62. The supply reel table 2 is braked, and when the supply reel table 2 is rotated away from the supply reel table 2, the braking force is turned off. In the case of the present embodiment, the supply reel base brake member 4
The cam slider 31 described later makes it possible to brake the supply reel base 2 in a two-stage ON state of a soft state and a main state having a braking force higher than the soft state, and to turn the braking force off. ing. The supply reel base brake member 4 is made by integrally forming a synthetic resin.

A stopper 70 is formed at a position on the left side of the gear box 12 of the chassis 11. The stopper portion 70 contacts the lever portion 62 when the supply reel base brake member 4 is in the off state, thereby preventing the supply reel base 2 from being separated from the supply reel base 2 by a predetermined amount or more. In the present embodiment, the stopper 70 is formed by bending a metal plate of the chassis 2.

The take-up reel base brake member 5 applies a brake to the take-up reel base 3 in two stages, a soft state and a main state in which a braking force is higher than the soft state. This is made possible by a cam slider 31 described later.

The supply reel base brake member 4 and the take-up reel base brake member 5 are urged by a coil spring 13 in a braking direction. A head cylinder 13 is provided behind the chassis 11.

An operation lever 14 and a tension lever 15 are provided on the tape supply side of the chassis 11 in a rotatable state, and a tape supply side slider 16 is slidable between the tape cassette side and the head cylinder 13 side. It is provided in a state.

The tension lever 15 is connected to one end of the brake belt 10. Brake belt 10
, The intermediate portion is wound around the supply reel base 2, and the supply reel base 2 is braked according to the rotation angle of the tension lever 15.

On the tape winding side of the chassis 11, a tape supply side slider 17 is provided so as to be slidable between the tape cassette side and the head cylinder 13 side, and a pinch lever 18, operating levers 19 and 9 are provided.
The number guide lever 20 is provided in a rotatable state.

The operating lever 14 drives the tension lever 15 at the tape loading position. The tension lever 15 has a tension post 2
1 is provided.

A guide roller 22 for guiding a magnetic tape and a shift post 23 are formed on the tape supply slider 16. A guide roller 24 is provided on the tape supply side of the chassis 11.

A shift post 25 for guiding a magnetic tape and a guide roller 26 are provided on the tape take-up side slider 17.
Are provided. The pinch lever 18 is provided with a pinch roller 27. A capstan 28 is provided on the tape winding side of the chassis 11. The ninth guide lever 20 is provided with a shift post 29.

The pinch lever 18 and the operating lever 19
Are interlocked via the lever 30.

In FIG. 2, the cam slider 31 is slidably attached to the lower side of the chassis 11. In the cam slider 31, cam grooves 32, 33, 34,
35 are formed.

The operating lever 14, the supply reel base brake member 4, the take-up reel base brake member 5, and the operating lever 19 are provided with pins 37, 3 formed thereon.
8, 39 and 40 are cam grooves 32, 33, 34 and 3 respectively.
5 and is driven to rotate by the slide of the cam slider 31.

The slider 16 on the tape supply side and the slider 17 on the tape winding side are slidably provided along grooves 66 and 67 formed in the chassis 11, respectively.
Guide lever 4 via connecting levers 68 and 69, respectively.
It is linked to 0,41. Guide lever 4
0 and 41 are engaged with gears 42 and 43 formed respectively, and rotate in opposite directions.
The guide lever 41 is provided with a gear 44. The gear 44 meshes with a gear 45, and the gear 45 meshes with a gear portion 46 of the cam slider 31. As a result, the slide of the cam slider 31 causes the tape supply side slider 16 and the tape take-up side slider 17 to move into the groove 6.
It slides along 6,67.

The cam gear 50 is for driving the cam slider 31 and the ninth guide lever 20 shown in FIG. 1, and is rotatably provided on the chassis 11 to form a gear portion which meshes with the gear portion 47 of the cam slider 31. In addition, a cam that is linked to the ninth guide lever 20 in FIG. 1 is formed. The gear formed on the cam gear 50 includes:
The power of the mode motor 57 is transmitted through the gears 51, 52, 53, 54, 55 and the worm gear 56. Cam gear 50, gears 51 and 5
2, 53, 54, 55, the worm gear 56, the mode motor 57, and the drive circuit of the mode motor 57 constitute a mode switching means. The cam gear 50 is provided with first to third cam switches, and various modes can be detected by turning on and off these cam switches.

FIG. 3 shows the supply reel base brake member 4 shown in FIG.
3 (a) shows an off state, and FIG. 3 (b) shows an on state of a main state.

In FIG. 3, the supply reel base brake member 4 is rotatable about a shaft 61, and is driven to rotate by sliding the cam slider 31 shown in FIG.

In the off state shown in FIG. 3A, the brake lever 62 of the supply reel base brake member 4 does not contact the brake belt 10 of the supply reel base 2.

In the ON state shown in FIG. 3B, the supply reel base brake member 4 rotates to the rotation angle A1, and the brake lever 62 strongly contacts the brake belt 10 of the supply reel base 2. It is greatly curved and applies a relatively strong braking force to the supply reel base 2 via the brake belt 10.

Here, the supply reel base brake member 4 is
Even if a repetitive operation or high-temperature installation in the ON state is performed, and the brake lever portion 62 is largely bent in the ON state, the stopper portion 70 abuts on the lever portion 62 in the OFF state, so that the brake lever Since the bending of the portion 62 is bent back, the bending deformation of the lever portion 62 can be reduced.

As described above, in the present embodiment,
Lever part 6 for brake of supply reel base brake member 4
2 can reduce the bending deformation, preventing the braking force in the ON state from decreasing, preventing the torque of the supply reel base from decreasing, preventing the tape from becoming loose, and extending the life of the magnetic recording / reproducing device. can do.

In the embodiment of the invention shown in FIGS. 1 to 3, the supply reel base brake member 2 is provided with an elastically deformable brake lever 62, and a stopper is provided on the supply reel base brake member 4 side. The take-up reel base brake member 5 may be provided with an elastically deformable brake lever part, and the take-up reel base brake member 5 may be provided with a stopper at the stopper part. An elastically deformable brake lever portion is provided on both the brake member 4 and the take-up reel base brake member 5, and stopper portions are provided on both sides of the supply reel base brake member 4 and the take-up reel base brake member 5. Is also good.

[0038]

According to the present invention, since the bending deformation of the brake lever of the reel base brake member can be reduced, the brake force in the ON state is prevented from lowering, and the torque of the supply reel base is reduced. It is possible to prevent the tape from being loosened and prolong the life of the magnetic recording / reproducing apparatus.

[Brief description of the drawings]

FIG. 1 is a plan view of a magnetic recording / reproducing apparatus according to an embodiment of the present invention, as viewed from above.

FIG. 2 is a bottom view of the magnetic recording / reproducing apparatus of FIG. 1 as viewed from below.

FIG. 3 is an explanatory view showing an operation of a supply reel base brake member of FIG. 1;

FIG. 4 is an explanatory view showing the operation of a conventional supply reel base brake member.

FIG. 5 is an explanatory view showing a deformation of a conventional supply reel base brake member.

[Explanation of symbols]

 Reference Signs List 2 supply reel base 3 take-up reel base 4 supply reel base brake member 11 chassis 62 lever part 70 stopper part

Claims (5)

[Claims] 1. A supply reel table that fits with a supply reel of a tape cassette when the tape cassette is loaded in a cassette, and a take-up reel that fits with a take-up reel of the tape cassette when the tape cassette is loaded in the cassette. A reel base brake device used for a magnetic recording / reproducing apparatus having a base, an elastically deformable brake lever portion, and a lever near at least one of the supply reel base and the take-up reel base. It is provided in a rotatable state, and when the reel unit is rotated toward the reel base, a braking force is generated by elastic deformation of the lever unit to brake the reel base, and when the reel unit is rotated away from the reel base. A reel base brake member capable of turning off the braking force; Reel base braking device of a magnetic recording and reproducing apparatus, characterized in that it comprises a and a stopper portion for preventing the leaving more than a predetermined amount from the reel stand by contacting the lever portion in a state at the time. And a take-up reel that fits with a take-up reel of the tape cassette in a state where the tape cassette is loaded in the cassette. A reel base brake device used for a magnetic recording / reproducing device having a base, an elastically deformable brake lever part, provided rotatably on the supply reel base, and provided on the supply reel base side. It is possible to generate a braking force due to the elastic deformation of the lever portion when the lever rotates, to brake the supply reel table, and to turn off the braking force when rotating to a side away from the supply reel table. A supply reel base brake member, which comes into contact with the lever portion when the supply reel base brake member is in an off state. Reel base braking device of a magnetic recording and reproducing apparatus, characterized in that it comprises a and a stopper portion for preventing the leaving more than a predetermined amount from the supply reel table by. 3. A chassis, provided on the chassis,
A supply reel base for fitting the tape cassette supply reel with the tape cassette loaded with the cassette,
A reel base brake device for use in a magnetic recording / reproducing device having a take-up reel table fitted to a take-up reel of a tape cassette in a state where the tape cassette is loaded in the cassette, wherein the tape cassette is elastically deformable. A brake lever portion, provided rotatably in the vicinity of at least one of the supply reel table and the take-up reel table of the chassis,
A brake force is generated by elastic deformation of the lever portion when the reel base is rotated, and the reel base is braked, and a brake force is turned off when the reel base is rotated away from the reel base. And a stopper formed on the chassis to prevent the reel base brake member from separating from the reel base by a predetermined amount or more by contacting the lever part when the reel base brake member is in an off state. A reel stand brake device for a magnetic recording and reproducing device. 4. The reel stand brake device for a magnetic recording / reproducing apparatus according to claim 3, wherein the chassis is formed of a metal plate, and the stopper is formed by bending a metal plate of the chassis. 5. The reel stand brake device for a magnetic recording / reproducing apparatus according to claim 1, wherein the reel stand brake member is formed integrally with a synthetic resin.