JPH10124958A - Brake device of tape recorder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the occurrence of damage to a tape by a simple structure when the instantaneous stop happens at the time of cue review. SOLUTION: A solenoid 14 is provided at the center of a mechanical deck 11. A supply reel base 12 and a take-up reel base 13 are driven direct by a motor. With coil springs 17,18, guide drive slider 20 and control levers 25, 26, an energizing means is constituted for energizing the brake member relatively hard in the braking direction at the time of pinch-roller OFF mode and relatively weak in the braking direction at the time of pinch-roller ON mode.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tape recorder brake device, and more particularly to a tape recorder brake device capable of preventing data damage.

[0002]

2. Description of the Related Art Conventionally, there are a video tape recorder (VTR) VTR, a data streamer, etc., which use a direct motor on a reel base for the purpose of stability of running performance, reduction of a winding time, and high-speed search. Then
There is a tendency for that need to increase. The reason for this is that the data recording capacity is increased by narrowing the track pitch and the cassette itself is downsized, the tape tension is reduced by reducing the tape thickness, and the operability is improved by shortening the winding time.

In a tape recorder using such a direct motor, a reel stand brake operated by a solenoid is used to protect the tape during an emergency operation, prevent tape movement during a mode transition, and smoothly stop from fast-forward rewind. Is generally performed. Therefore, even if a power failure occurs during fast-forward rewind and the power of the set is cut off (hereinafter, instantaneous blackout), the operation can be interrupted without any tape damage, and preparations can be made for a return.
However, during the cue review (high-speed search), the mechanical state is such that the tape is wound on a reel and simultaneously fed in a predetermined direction by a capstan and a pinch roller.

At this time, if a momentary stoppage occurs, the reel is stopped almost instantaneously by the brake, but at the pinch roller portion, the tape tension extremely rises due to the inertia of the capstan portion, and tape damage occurs.

[0005] To prevent this, there are devices designed to operate both the pinch roller and the solenoid, but these devices are very expensive and cannot be said to be appropriate even in view of the probability of an instantaneous stop. .

[0006]

In the above-described conventional tape recorder using a direct motor, it is common practice to provide a reel base brake operated by a solenoid. Thus, the state of the mechanism at the time of cue review is such that the tape is wound around the reel and simultaneously fed in a predetermined direction by the capstan and the pinch roller.
At this time, if an instantaneous stop occurs, the reel is stopped almost instantaneously by the brake, but at the pinch roller portion, the tape tension is extremely increased due to the inertia of the capstan portion, and tape damage occurs. For this measure,
Some devices are designed such that the pinch roller is also operated by a solenoid, but this is very expensive, and is not appropriate in view of the probability of a momentary blackout.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a brake device for a tape recorder, which eliminates the above-mentioned problems, has a simple structure, and can prevent tape damage when an instantaneous stop occurs during cue review. I do.

[0008]

According to a first aspect of the present invention, there is provided a brake device for a tape recorder, wherein the tape cassette is loaded with the supply cassette of a tape cassette and the tape cassette is loaded with the cassette. A take-up reel table that fits with the take-up reel of the tape cassette in a state of being released, a brake member that brakes the supply reel table and the take-up reel table, and release of the brake by the brake member is performed by moving a plunger. A solenoid to perform and relatively strongly urges the brake member in the direction of braking when in a pinch roller off mode, and relatively weakly urges the brake member in the direction of braking when in a pinch roller on mode And a biasing means for performing the operation.

According to a second aspect of the present invention, there is provided a brake device for a tape recorder, wherein the tape cassette is loaded with the cassette and the supply reel table is fitted with the supply reel of the tape cassette; and the tape cassette is loaded with the cassette. A take-up reel table that fits with the take-up reel, a brake member that brakes the supply reel table and the take-up reel table, a solenoid that releases a brake by the brake member by moving a plunger, and the tape A tape guide member that draws out and guides the magnetic tape of the cassette, a guide drive slider that drives the tape guide member by sliding, and a pinch roller off member that is provided between the tape guide member and the brake member. Mode And a coil spring for relatively strongly urging the member in the direction in which the brake is applied, and for urging the brake member relatively weakly in the direction in which the brake is applied in the case of the pinch roller ON mode. .

According to a third aspect of the present invention, there is provided a brake device for a tape recorder according to any one of the first and second aspects, wherein the supply reel table and the take-up reel table are directly controlled by a motor. It is characterized by being driven.

According to the first and third aspects of the present invention, when the biasing means is in the pinch roller on mode, the brake member is biased relatively weakly in the braking direction.
If a momentary stop occurs, the supply reel and take-up reel base can be slipped against the brake member, and with a simple structure, tape damage does not occur if a momentary stop occurs during cue review. It is an object of the present invention to provide a brake device for a tape recorder that can perform the above operation.

According to the second and third aspects of the present invention, when the coil spring is in the pinch roller ON mode, the brake member is relatively weakly urged in the direction in which braking is performed. The supply reel allowance and the take-up reel stand can be slipped against the brake member,
An object of the present invention is to provide a tape recorder brake device that has a simple structure and can prevent tape damage when a momentary stop occurs during cue review.

[0013]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a plan view showing a first embodiment of a brake device for a tape recorder according to the present invention, which is applied to a 6 mm video tape recorder (VTR), and is provided immediately before the start of tape loading. The state is shown.

In FIG. 1, reference numeral 11 denotes a mechanical deck. On the mechanical deck 11, a supply reel table 12 fitted with a supply reel of the tape cassette in a state where the tape cassette is loaded into the cassette, and a cassette loaded with the tape cassette. In this state, a take-up reel table 13 that fits with the take-up reel of the tape cassette is provided side by side. A solenoid 14 is provided at the center of the mechanical deck 11. The supply reel table 12 and the take-up reel table 13 are directly driven by a motor.

At a position between the supply reel table 12 and the solenoid 14 of the mechanical deck 11, a brake lever 15 is provided in a rotatable state. At a position between the take-up reel base 13 and the solenoid 14 of the mechanical deck 11, a brake lever 16 is provided in a rotatable state. One end of each of the brake levers 15 and 16 contacts the supply reel table 12 and the take-up reel table 13 when braking is performed. Brake levers 15, 16
Are urged by coil springs 17 and 18 in the direction of braking.

One end of each of the coil springs 17 and 18 is attached to brake levers 15 and 16, and the other end is attached to control levers 25 and 26 which will be described later, and the biasing force of the brake levers 15 and 16 is controlled. The adjustment is made by levers 25 and 26.

The brake levers 15, 16 are pushed in the direction to turn off the brake by the plunger 19 of the solenoid 14, the other end of which is on. With such a structure, the brake levers 15 and 16 and the coil spring 1
Reference numerals 7 and 18 denote a supply reel table 12 and a take-up reel table 13.
The brake member which performs a brake is comprised. The solenoid 14 releases the brake by the brake member by the suction movement of the plunger 19.

The guide drive slider 20 is slidably mounted on a frame of a 6 mm digital VTR described later. The guide drive slider 20 includes
Cam grooves 21 and 22 and guide grooves 23 and 24 are formed. A control lever 25 on the tape supply side, a control lever 26 on the tape take-up side, and a rotatable state are provided on a frame described later. The guide grooves 23 and 24 of the guide drive slider 20 have pins 27 and 28 of the rotation shafts of the control levers 25 and 26 inserted therein, and regulate the sliding direction of the guide drive slider 20. The control levers 25 and 26 have cam pins 21 and 30 formed on the control levers 25 and 26, respectively.
2 and is driven to rotate by the slide of the guide drive slider 20.

The control levers 25 and 26 constitute a tape guide member for drawing out and guiding the magnetic tape of the tape cassette. The guide drive slider 20 drives the tape guide member by sliding.

The guide drive lever 40 is for driving the guide drive slider 20, and is provided on the frame so as to be rotatable about a shaft 41. A pin 42 formed on one end side guides the guide drive slider 20. The pin 43 inserted in the groove 26 and formed on the other end side is inserted in the cam groove 45 of the cam gear 44.

Parts of the brake levers 15 and 16 which come into contact with the supply reel table 12 and the take-up reel table 13 are provided with members 46 and 47 having a large frictional force such as rubber.

With such a structure, the coil springs 17,
18, the guide drive slider 20, and the control levers 25 and 26 relatively strongly urge the brake member in the direction of braking when in the pinch roller off mode, and brake the brake member in the pinch roller on mode. Is relatively weakly biased in the direction in which the force is applied.

In the state of FIG. 1, the power is off.
The solenoid 14 is turned off and the brake levers 15, 16
The members 46 and 47 apply a brake to the supply reel table 12 and the take-up reel table 13.

FIG. 2 is a cross-sectional view of the brake device of FIG. 1 including the frame as viewed from the right side in the drawing.

In FIG. 2, reference numeral 50 denotes a frame. A cam gear 44 is disposed above the frame 50, and a control lever 26, a brake lever 16, and a guide drive lever 40 are disposed below the frame 50. The guide drive slider 20 is mounted below the guide drive lever 26 and the guide drive lever 40. Control lever 26 and brake lever 1
6, a coil spring 18 is attached. The outer peripheral portion of the take-up reel base 13 is at a position where it can contact the member 47 of the brake lever 16.

FIG. 3 is a plan view showing the structure of a main part including the tape cassette of the 6 mm digital VTR shown in FIG. 1. A solid line shows a state where the tape loading is completed, and a solid line shows a state of the tape loading start position. Is shown.

In FIG. 3, a tape cassette 61 is arranged on a frame 50 by cassette loading. The tape cassette 61 is configured such that a supply reel 63 and a take-up reel 64 are rotatably housed in a cassette case 62 formed of plastic in a box shape. The lid 65 (only the left and right mounting portions are shown in the drawing) provided on the front of the cassette case 62 is opened by a lid opener (not shown) of the 6 mm digital VTR. A magnetic tape 66 coated with a magnetic material is wound around the supply reel 63 and the take-up reel 64.

The magnetic tape 66 extends from the supply reel 63 to the outside of the cassette case 62, and is a 6 mm digital VT.
Tension roller 6 attached to R frame 50
8 and guide lever arm stopper 69 on the tape supply side
After being guided by the guide roller 72 and the shift post 73 of the slider arm stopper 71 on the tape supply side, and wound around the rotary cylinder 74, the shift post 76 and the guide roller 77 of the slider arm stopper 75 on the tape winding side. Is guided to a guide roller 78 attached to a fixed position of the frame, and a capstan 79 is provided.
And the pinch roller 80, the guide roller arm of the guide lever arm stopper 81 on the tape winding side, and the guide roller 8 attached to the frame.
3 and is taken up by the take-up reel 64.

Guide lever arm stoppers 69, 81
Are interlocked with the control levers 25 and 26 in FIG. 1, respectively.

FIG. 4 is a plan view showing the appearance of the mechanical system of the 6 mm digital VTR shown in FIG.

A cassette holder 90 is disposed above the supply reel table 12 and the take-up reel table 13 of the frame 50. From the rotary cylinder 74, the flexible wiring 9
1,92 are extended. On the right side of the rotary cylinder 74, a cassette loading motor 93 is arranged. On the right side of the rotary cylinder 74, a capstan motor 94 and a tape loading motor 95 are arranged.

The operation of the embodiment of the present invention will be described below with reference to FIGS. 1, 5 and 6.

FIG. 5 is a plan view showing a case where the main part of FIG. 1 is in the pinch roller off mode.

FIG. 6 is a plan view showing a case where the main part of FIG. 1 is in the pinch roller ON mode.

In the state shown in FIG. 1 described above, the power is off, the solenoid 14 is turned off, and the members 46 and 47 of the brake levers 15 and 16 are
And the take-up reel table 13 is braked. The guide slider 20 is located on the leftmost side and has cam grooves 21 and 22.
, The control levers 25 and 26 are located at positions where the portions to which the coil springs 17 and 18 are attached come to the outermost positions.

When the power is turned on and the operation of the mechanical system is performed, the solenoid 14 pulls the plunger 19 in the direction of the arrow, rotates the brake levers 15 and 16 in FIG. The brake on the take-up reel base 13 is released. In this state, the cam grooves 21 and 22
, The control levers 25 and 26 are located at positions where the portions to which the coil springs 17 and 18 are attached are located at the outermost positions, and the brake levers 15 and 16 are relatively moved from the coil springs 17 and 18 in the braking direction. Is given a strong bias. In this state, the capstan 79 and the pinch roller 80 shown in FIG. 3 do not sandwich the magnetic tape 66.

In this case, in the state shown in FIG. 5, fast forward and rewind without displaying an image are performed.

Thereafter, as the cam gear rotates clockwise 44, the guide slider 20 moves to the right, and the state shown in FIG. 6 is obtained.

In FIG. 6, in the pinch roller on mode, the guide slider 20 comes to the right side and
Due to the position 2, the control levers 25 and 26 are at positions where the parts to which the coil springs 17 and 18 are attached come to the innermost positions. As a result, the tension lengths of the coil springs 17 and 18 are shortened, and the urging force of the coil springs 17 and 18 applied to the brake levers 15 and 16 in the braking direction is reduced. In this state, the capstan 79 shown in FIG.
The pinch roller 80 is in a state where the magnetic tape 66 is sandwiched.

In this case, in the state shown in FIG.
Playback, high-speed search (queue review).

Here, in the state of FIG. When a momentary stop occurs during cue review, the solenoid 14 is turned off, and the brake levers 15 and 16 rotate clockwise and counterclockwise, respectively, to brake the supply reel table 12 and the take-up reel table 13. 25,2
6, the biasing force applied from the coil springs 17 and 18 to the brake levers 15 and 16 in the direction in which the brakes are applied becomes relatively small.
6, the supply reel table 12 and the take-up reel table 13 can be slipped, and tape damage can be prevented.

As described above, according to the embodiment of the present invention, it is possible to prevent tape damage from occurring when an instantaneous stop at the time of cue review occurs with a simple structure. Tape damage can be prevented without significantly increasing the cost.

In the embodiment of the invention shown in FIGS. 1 to 11, the present invention is applied to a 6 mm digital VTR. However, another supply reel base and a take-up reel base such as an 8 mm VTR are directly driven by a motor. The present invention may be applied to a brake device of a tape recorder to be performed.

[0045]

According to the present invention, tape damage can be prevented with a simple structure when an instantaneous stoppage occurs during cue review, so that tape damage can be prevented without significantly increasing manufacturing costs. Can be prevented.

[Brief description of the drawings]

FIG. 1 is a plan view showing a first embodiment of a brake device for a tape recorder according to the present invention;

FIG. 2 is a sectional view of the brake device of FIG. 1 including a frame as viewed from the right side in the figure.

FIG. 3 is a plan view showing a configuration of a main part including a tape cassette of the 6 mm digital VTR in FIG. 1;

FIG. 4 is a plan view showing the appearance of the mechanical system of the 6 mm digital VTR in FIG. 1;

FIG. 5 is a plan view showing a case where a main part of FIG. 1 is in a pinch roller off mode.

FIG. 6 is a plan view showing a case where a main part of FIG. 1 is in a pinch roller ON mode.

[Explanation of symbols]

 Reference Signs List 12 supply reel base 13 take-up reel base 14 solenoid 15, 16 brake lever 17, 18 coil spring 19 plunger 20 guide drive slider 25, 26 control lever

Claims (3)

[Claims] 1. A supply reel table that fits with a supply reel of a tape cassette in a state where the tape cassette is loaded in a cassette, and a winding 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, a brake member that brakes the supply reel base and the take-up reel base, a solenoid that releases a brake by the brake member by moving a plunger, and brakes the brake member in a pinch roller off mode. Biasing means for relatively strongly urging in the direction in which the brake is applied, and for urging the brake member relatively weakly in the direction in which the brake is applied in the case of the pinch roller ON mode. Brake equipment. And a take-up reel fitted with a take-up reel of the tape cassette in a state where the tape cassette is loaded with the cassette and a cassette loaded with the tape cassette. A reel base, a brake member that brakes the supply reel base and the take-up reel base, a solenoid that releases the brake by the brake member by moving a plunger, and a guide that pulls out the magnetic tape of the tape cassette and guides the magnetic tape. And a guide drive slider that drives the tape guide member by performing sliding, provided between the tape guide member and the brake member,
A coil spring that urges the brake member relatively strongly in the direction of braking when in the pinch roller off mode, and relatively weakly urges the brake member in the direction of braking when in the pinch roller on mode. A brake device for a tape recorder, comprising: 3. The tape recorder brake device according to claim 1, wherein the supply reel table and the take-up reel table are directly driven by a motor.