JP2511875Y2 - Tape breaker soft break mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a rotary head type tape player such as a VTR or DAT, and in particular, software that does not require a special drive device or control device for brake operation control. Brake mechanism.

[Prior Art] In a rotary head type tape player such as a VTR or DAT, light braking is applied to the reel stand so that the tape vibration does not occur and a signal reading error does not occur when the tape is fed at high speed for search. .

Such a soft brake mechanism is disclosed in JP-A-1-106352.

In the soft brake mechanism, the control lever is slidably supported on the chassis, and the brake lever is attached to the brake drum provided on each of the take-up reel base and the supply reel base, and the brake shoe is pressed against the brake lever. Both the take-up reel base and the supply reel base are braked by driving to feed the tape at high speed.

[Problems to be Solved by the Invention] In the above-mentioned conventional device, there is a problem that a special driving mechanism for driving the braking lever is required and the device becomes complicated.

Further, since the reel base on the tape winding side is also braked, power loss during high-speed tape feeding becomes large.

The present invention has been made in view of the above points, and an object thereof is a tape for braking only a reel base of a tape feeding side without requiring a special drive mechanism for driving a braking lever. It is to provide a soft brake mechanism for a player.

[Means for Solving the Problems] The soft brake mechanism of the tape player according to the present invention is
A high-speed swing arm and a low-speed swing arm are rotatably supported coaxially with a drive gear that is rotated forward and reverse by transmitting the rotation of the motor, and the tip of each swing arm is constantly meshed with the drive gear. Each idler gear is rotatably supported, and the high-speed swing arm or the low-speed swing arm is rotated by the rotational frictional force of the drive gear, and the idler gear is rotated to a gear for transmitting rotation to the take-up reel stand or a supply reel stand. Of the high-speed swing arm or the low-speed swing arm by controlling the rotation of the high-speed swing arm or the low-speed swing arm by means of a cam plate. In the tape player, the brake shoe is supported on the rear end of the high-speed swing arm and the drum or the drum provided on the take-up reel stand is used. To allow pressure contact with one drum which is provided on the reel base, which is constituted so as to apply a braking towards the reel stand for feeding the tape when the tape fast feeding.

Further, a high-speed swing arm and a low-speed swing arm are rotatably supported coaxially with a drive gear that transmits the rotation of the motor and is normally or reversely rotated, and the drive gear is provided at the tip of each swing arm. A gear or supply reel base that rotatably supports idler gears that are constantly meshed and that rotates the high-speed swing arm or low-speed swing arm by the rotational frictional force of the drive gear to transmit the idler gear to the take-up reel stand. Is configured to mesh with a gear that transmits rotation to the tape, and the rotation of the high-speed swing arm or the low-speed swing arm is controlled by a cam plate to feed the tape at high speed, low speed, fast rewind, and low speed. In a tape player in which rewinding is selected, a brake shoe is supported on the rear end of the low-speed swing arm and a drum provided on the take-up reel stand is used. Contact possible and then, which is constituted so as to apply a braking towards the reel stand for feeding the tape at the time of rewinding the tape slowly.

[Operation] According to the soft brake mechanism of the tape player of the present invention, when the swing arm is rotated by the rotational frictional force of the drive gear and the idler gear supported at the tip of the swing arm is meshed with the gear on one reel base side. The brake shoe attached to the rear end of the swing arm is pressed against the drum of the other reel stand to brake it.

[Embodiment] A soft brake mechanism of a tape player according to an embodiment of the present invention will be described with reference to the drawings.

 FIG. 1 is an exploded perspective view showing an embodiment.

A take-up reel shaft 15, a supply reel shaft 16, shafts 18 and 19, and a bearing 17 are press-fitted and fixed to predetermined positions of the chassis 1.

The take-up reel base 2 and the supply reel base 3 are rotatably fitted to the take-up reel shaft 15 and the supply-side reel shaft 16, respectively, and their upward movement is restricted by a snap ring 21.

The take-up reel base 2 and the supply reel base 3 have the same shape, and a member that engages with the reel hole of the tape cassette is provided at the upper part, a gear is integrally formed at the center, and a drum is integrally formed above and below the gear. ing.

The drive gear 11 is press-fitted and fixed to a shaft 11a, and a high-speed swing arm 5, a compression coil spring 7 and a washer 6 are sequentially inserted in the upper part of the shaft 11a and are locked by a snap ring 21.

A low-speed swing arm 10, a compression coil spring 7 and a washer 6 are sequentially inserted under the shaft 11a, and a pulley 20 is fixed with an adhesive after the lower part of the shaft 11a is inserted through a bearing 17.

The rotation of the motor is transmitted to the pulley 20 by a belt (not shown).

A high-speed idler gear 8 is inserted through a shaft 5a provided upright on the tip of the high-speed swing arm 5 and is locked by a retaining ring 21.

The high speed idler gear 8 constantly meshes with the drive gear 11.

Brake shoes above the rear end of high-speed swing arm 5
Leaf springs 12a to which left and right 12 and 12 are fixed are fixed by screws 13, and a pin 5b is erected on the lower side of the rear end of the high-speed swing arm 5.

A low speed idler gear 9 is inserted through a shaft 10a provided upright at the tip of the low speed swing arm 10 and is locked by a snap ring 21.

The low speed idler gear 9 always meshes with the drive gear 11.

Brake shoes below the rear end of the low-speed swing arm 10.
A leaf spring 22a to which 22 is fixed is fixed by a screw 13, and a pin 10b is erected above the rear end of the low speed swing arm 10.

The cam plate 14 is slidably supported in the drive gear 11 direction and is driven by a drive mechanism (not shown) to change the position in the sliding direction.

The holes 14a provided in the cam plate 14 have pins 5b and 1
0b is inserted, and the cam plate 14 controls the rotation angles of the high-speed swing arm 5 and the high-speed swing arm 10.

A washer 4e, a compression coil spring 4d, a gear 4c, a felt 4b and a gear 4a are sequentially inserted into the shaft 18 and locked by a snap ring 21.

These constitute the slip mechanism 4, the gear 4a always meshes with the gear of the supply reel base 3, the gear 4c meshes with the low speed idler gear 9 when the low speed swing arm 10 rotates clockwise, and the rotation of the felt 4b causes friction. It is transmitted to the gear 4a via force.

When the high-speed swing arm 5 rotates clockwise, the high-speed idler gear 8 meshes with the gear 4a.

A slip mechanism similar to that described above is inserted through the shaft 19 and meshes with the gear of the take-up reel base 2.

 Next, the operation of the embodiment will be described with reference to FIG.

FIG. 10A shows a state of recording and reproduction, and low speed rewinding, in which the cam plate 14 is retracted.

The pin 5b of the high-speed swing arm is located in the narrow portion of the hole of the cam plate 14, and the rotation of the high-speed swing arm is restricted so that the high-speed idler gear does not mesh with the slip mechanisms 4, 4.

Further, the brake shoes 12, 12 do not contact the drums of the take-up reel base 2 and the supply reel base 3.

Although not shown, the pin 10b of the low speed swing arm is located in a wide portion in front of the hole of the cam plate 14, and the rotation of the low speed swing arm is not restricted by the cam plate 14.

When the drive gear 11 is rotated in the counterclockwise direction, the low-speed swing arm is rotated in the counterclockwise direction by the rotational frictional force, and the low-speed idler gear meshes with the gear 4c of the slip mechanism on the take-up reel side and passes through the slip mechanism. The take-up reel stand 2 is driven to rotate clockwise at a low speed.

Therefore, the tapes of the tape cassettes mounted on the take-up reel stand 2 and the supply reel stand 3 are sent to the take-up reel stand 2 side for reproduction or recording.

At that time, the brake shoe does not come into contact with the drum of the supply reel stand 3, but the tape tension is adjusted by a tape tension adjusting device (not shown).

When the drive gear 11 is rotated clockwise, the low-speed swing arm is rotated clockwise by the rotational frictional force, and the low-speed idler gear meshes with the gear 4c of the slip mechanism on the supply reel stand side and is supplied via the slip mechanism. The reel stand 3 is rotationally driven counterclockwise at a low speed.

Therefore, the tapes of the tape cassettes mounted on the take-up reel base 2 and the supply reel base 3 are sent to the supply reel base 3 side and reproduced in the reverse direction.

At this time, the brake shoe 22 comes into contact with the drum of the take-up reel stand 2 and an appropriate tension is applied to the tape.

FIG. 3B shows the state of the fast-forward mode and the fast-forward mode in the fast-forward direction, in which the cam plate 14 is moving forward.

The pin 5b of the high-speed swing arm is located in a wide portion of the hole of the cam plate 14, and the rotation of the high-speed swing arm is not restricted by the cam plate 14.

The pin 10b of the low speed swing arm is located in a narrow portion in the middle of the hole of the cam plate 14, and the rotation of the low speed swing arm is restricted by the cam plate 14.

When the drive gear 11 is rotated in the counterclockwise direction, the high-speed swing arm 5 is rotated in the counterclockwise direction by the rotational frictional force, and the high-speed idler gear 8 meshes with the gear 4a of the slip mechanism on the take-up reel stand side, and the high-speed idler gear 8 is engaged. The take-up reel base 2 is rotationally driven at high speed in the clockwise direction according to the gear ratio for use.

Therefore, the tapes of the tape cassettes mounted on the take-up reel stand 2 and the supply reel stand 3 are fed to the take-up reel stand 2 side at high speed, and fast-forward or fast search in the fast-forward direction is performed.

At this time, the brake shoe 12 is pressed against the drum of the supply reel stand 3 and a weak back tension is applied to the tape, so that the vibration during the tape running is suppressed.

FIG. 7C shows the state of the high-speed rewinding and the high-speed search mode in the rewinding direction, in which the cam plate 14 is moving forward.

At this time, the drive gear 11 is rotated clockwise, and the supply reel base 3 is rotationally driven counterclockwise. Further, the brake shoe 12 is pressed against the drum of the take-up reel stand 2 to give a weak back tension to the tape.

Although the embodiment is configured as described above, the invention is not limited to this. For example, if the flexure shoe is thick and has sufficient elasticity, it can be directly attached to the swing arm without a leaf spring.

[Effect of the Invention] According to the soft brake mechanism of the tape player of the present invention, a special drive mechanism for driving the brake shoes is not required, so that the space occupancy rate is small and the assembly and the maintenance are easy.

 Also, no adjustment is required during assembly.

Further, since the reel base on which the tape is wound is not braked, it is possible to obtain an effect that the mechanical loss is small.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a soft brake mechanism of a tape player according to an embodiment of the present invention, and FIGS. 2 (a) and 2 (b).
And (c) are schematic configuration diagrams showing the operation of the embodiment. 1 ... Chassis, 2 ... Take-up reel stand, 3 ... Supply reel stand,
4 ... Slip mechanism, 5 ... High-speed swing arm, 6 ... Washer, 7 ... Compression coil spring, 8 ... High-speed idler gear,
9 ... Low speed idler gear, 10 ... Low speed swing arm, 11
… Drive gear, 12… Brake shoe, 12a… Leaf spring, 13…
Screws, 14 ... Cam plate, 15 ... Take-up reel shaft, 16 ... Supply reel shaft, 17 ... Bearing, 18, 19 ... Shaft, 20 ... Pulley,
21 ... stop ring, 22 ... brake shoe, 22a ... leaf spring.

Claims (2)

(57) [Scope of utility model registration request] 1. A high-speed swing arm and a low-speed swing arm are rotatably supported coaxially with a drive gear that rotates forward and reverse when the rotation of a motor is transmitted. A gear that rotatably supports an idler gear that constantly meshes with the drive gear, and that rotates the high-speed swing arm or the low-speed swing arm by the rotational frictional force of the drive gear to transfer the idler gear to the take-up reel stand. The tape is configured to mesh with a gear that transmits rotation to the supply reel base, and the rotation of the high-speed swing arm or the low-speed swing arm is controlled by a cam plate to feed the tape at high speed, low speed, and fast rewind. , And a tape player in which low-speed rewinding is selected, a brake shoe is supported on the rear end of the high-speed swing arm and is provided on the take-up reel stand. To allow pressure contact with one drum which is provided on the arm or the supply reel base, the tape fast feeding tape player soft brake mechanism configured to apply a braking towards the reel stand for feeding the tape at the time of. 2. A high-speed swing arm and a low-speed swing arm are rotatably supported coaxially with a drive gear that is rotated by the rotation of a motor and is normally or reversely rotated. A gear that rotatably supports an idler gear that constantly meshes with the drive gear, and that rotates the high-speed swing arm or the low-speed swing arm by the rotational frictional force of the drive gear to transmit the idler gear to the take-up reel stand. The tape is configured to mesh with a gear that transmits rotation to the supply reel base, and the rotation of the high-speed swing arm or the low-speed swing arm is controlled by a cam plate to feed the tape at high speed, low speed, and fast rewind. , And a tape player in which low-speed rewinding is selected, a brake shoe is supported on the rear end of the low-speed swing arm and is mounted on the take-up reel stand. To allow pressure to arm, the tape slow rewind tape player soft brake mechanism configured to apply a braking towards the reel stand for feeding the tape at the time of.