JPS5880161A - Magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To prevent the up-down shift of a magnetic tape, by turning a take- up reel driving disk or a supply reel driving disk at an optional position between the stop position and the loading end position, and then actuating a pull-out post. CONSTITUTION:A control lever 30 is shifted toward an arrow K by a motor 32 when a control lever 21 is at a stop position. Thus the pins 24 and 25 ride on the cam part of the lever 30, and then main brakes 22 and 23 are detached from a supply reel drive disk 4 and a take-up reel drive disk 5 respectively. Then an idler pulley 27 is pressed to a motor pulley 35 which is previously turned by energizing a spring 34. In this case, the direction of the pulley 27 is decided by the turning direction of the pulley 35.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improved magnetic recording and reproducing apparatus of a type in which a magnetic tape is wound around a rotating drum having a built-in magnetic head.

A magnetic tape winding mechanism in a conventional magnetic recording/reproducing apparatus of this type is generally constructed as shown in FIG. In FIG. 1, 1 is a gear with a cam, and has a groove 1a for guiding a pin 3 caulked to a control lever 2. 4 is a supply reel stand, and 5 is a take-up reel stand, on which a reel of magnetic tape is attached. 6 and 7 are the main brakes of the supply reel stand 4 and take-up reel stand 5, respectively, and the spring 8
is always biased in the direction of the arrow (the direction in which the brake is applied). Reference numeral 9 denotes an idler pulley for fast-forwarding and rewinding the magnetic tape, which is connected to the lever 1o, receives the force of a spring 12 that pulls the lever 11 in the direction of the sign B, and always tries to return to the neutral point. 13 is idler pulley 9
It is an early spring pulley that rotates, and can rotate either clockwise or counterclockwise. 14 is a guide groove for guiding the idler pulley 9. 15 is a capstan pulley, which has a capstan shaft that feeds the magnetic tape at a constant speed. Reference numeral 16 designates an eye 5 for rotating the take-up reel stand 5 during recording and reproduction, which is connected to a lever 17 and biased in the direction of arrow C by a spring 18. Reference numeral 19 denotes a lever that restricts the movement of the idler 16 in the C direction.The lever 17 is supported by a contact point, and is biased by a spring 2o in the direction of the arrow more strongly than in the C direction.

In the conventional example configured as described above, first, in the winding operation during recording and reproduction, the position shown in the figure is set as the stop position, the gear l with the cam rotates counterclockwise, and the control lever 2 is rotated. Just before finishing moving in the direction of arrow E, α
The control lever 2 and the lever 19 start contacting each other,
At the moment when the rotation and movement are completed, the levers 17 and 19 are completely separated at β, and the idler 16 moves in the direction of arrow C by the bias of the spring 18 and comes into pressure contact with the take-up reel stand 5 and the capstan pulley 15. The rotation of the capstan pulley 15, which is rotating in advance, is transmitted to the take-up reel stand 5 to wind up the magnetic tape.

Next, in the fast forwarding and rewinding operations, when the cam gear 1 is rotated clockwise from the stop position shown in the figure, the control lever 2 begins to move in the direction of arrow F. Then, γ of the lever "-11, which was separated from the control lever 2, begins to come into contact with it, and the idler pulley 9 is moved in the direction of arrow C via the lever 1o, and is pressed against the early spring pulley 13. At this time, the early spring boot ' In the direction of rotation of pulley 13, idler pulley 9
The direction of entry can be determined. That is, when the rotation direction of the single-wound goo 913 is clockwise, the idler pulley 9 is pressed against the take-up reel stand 5 side, and fast forwarding of the tape is performed, and when the rotation direction is counterclockwise, the idler pulley 9 is pressed against the supply reel stand 4 side. , rewinding is performed. In addition, when winding the tape, control lever 2
As a result of the movement of the main brake 6, the main brake 7 is naturally released.

However, the conventional example having the above configuration has the following problems. First, it is impossible to perform fast forwarding or rewinding when required while remaining in the stopped position, and it is also impossible to wind up the magnetic tape on the supply reel stand when loading is complete.

Therefore, the present invention rotates the take-up reel stand or the supply reel stand to wind the magnetic tape at any position in the process from the stop position to the loading completion position, and stops each reel stand when rotation is unnecessary. The main brake is operated to prevent the magnetic tape from shifting in the vertical direction when the magnetic tape is wound on the supply reel stand after loading is completed, and the drawer post is operated. It provides equipment. Hereinafter, embodiments will be described in detail with reference to the drawings.

FIG. 2 shows an embodiment of the present invention, in which a supply reel stand 4, a take-up reel stand 5, and a cam gear 1 (not shown) are the same as conventional ones. 21 is a first control lever operated by a gear with a cam, 22.23 is a main brake provided on the supply reel stand 4 and take-up reel stand 5, respectively, and 24.25 is a main brake 2, respectively.
The main brake 22.23, which is used when releasing the brake by a pin press-fitted into the main brake 22.23, is always biased by a spring 26 in the direction in which the brake is applied. 27
is an idler pulley, which is connected to levers 28 and 29. By moving the lever 31, which is operated by the movement of the second control lever 30, in the direction of arrow J, the idler pulley 2 is
7 is held in the H direction.

The second control lever 30 is operated by the rotation of the motor 32. 33 is a groove for guiding the idler pulley 27, which is pulled by a spring 34 when the lever 31 is released from the second control lever 30, so that the idler pulley 27 comes into pressure contact with the reel motor pulley 35. The reel motor pulley 35 rotates both clockwise and counterclockwise. 36 is a bottle press-fitted into the lever 31.

Reference numeral 38 denotes a lever that rotates around a shaft caulked to the second control lever 30, and is biased clockwise by a spring 39. Reference numeral 40 denotes a magnetic tape pull-out arm and post, which is arranged between a pinch roller (not shown) and the take-up reel stand 5, and regulates vertical movement when the magnetic tape is running. 41.
As shown in FIG. 3, 42 is a photosensor that detects and controls when and how far the second control lever 30, which is moved by the motor 32, should be moved.

Next, the operation of this embodiment will be explained. First, in the fast forward/rewind operation, when the first control lever 21 is at the stop position, when the second control lever 39 is moved in the direction of the arrow by the motor 32, the bins 24 and 25 are moved to the second control lever 21. It rides on the cam part of the lever 30 and the main brake 22
and 23 are the supply reel stand 4 and the take-up reel stand 5, respectively.
move away from At the same time, the bin 36 separates from the cam portion, and the idler boot 927 comes into pressure contact with the reel motor pulley 35, which has been rotating in advance, due to the bias of the spring 34.

The direction in which the idler pulley 27 enters is determined by the rotational direction of the reel motor pulley 35 at this time. That is, when rotating clockwise, it is on the take-up reel stand 51I, and when rotating counterclockwise, it is on the supply reel stand 4 side.

Next, a description will be given of the magnetic tape winding operation by the supply reel stand 5 during recording and reproduction and when loading is completed. 1st
When the control lever 21 is moved toward the recording/reproducing position,
Bins 24 and 25 come into contact with the cam part, and the main brake 2
2.23 separates from the supply reel stand 4 and take-up reel stand 5, respectively. At the same time, the bin 36 separates from the force arm portion, and the idler pulley 27 comes into pressure contact with the reel motor pulley 35, which has been rotating in advance, due to the bias of the spring 34. At this time, as described above, the direction in which the idler pulley 27 enters is determined by the rotational direction of the reel motor pulley 35. Here, the operation of the arm for pulling out the magnetic tape and the post 40 (hereinafter simply referred to as arm) will be explained. The arm 40 is
During fast forwarding, rewinding, and stopping, the operation must not be performed to prevent an increase in the running load on the magnetic tape and to prevent damage to the magnetic tape, and must be activated immediately after loading starts.

FIG. 4 shows the first and second control L//(21-,,FOJ?1 and L//) during fast forwarding, rewinding, and stopping.
<-3817), the solid line position of the lever 38 is the stop position, and the one-dot chain line position is the fast forward and rewind position. That is, the second control lever 30 is moved in the direction by the motor 32 shown in FIG. The moment when the first control lever 21 starts to move in the direction of the arrow from the stop position shown in FIG. 4 is the loading start time.
When the control lever 30 is moved in the direction, the positional relationship as shown in FIG. 5 is obtained. At this time, the lever 38 comes into contact with the arm 40, rotates the arm 40 in the M direction, and pulls out the magnetic tape.

Then, the first control lever 21 moves in the L direction.
When the second control lever 30 is moved in the opposite direction,
The lever 38 is in the position shown by the dashed line in FIG.
0 ends the rotation.

Since the present invention is configured as described above, it is possible to wind the magnetic tape on either the take-up reel stand or the supply reel stand at any position in the process from the stopped state to the completion of loading. Furthermore, at the time of winding up the magnetic tape by the supply reel stand in the loading completed state, a drawer post can be used to regulate the vertical movement of the magnetic tape.

This drawer post is operated at all times except when fast forwarding, rewinding, or stopping. Furthermore, there are many advantages, such as the ability to operate the main brakes provided on the supply reel stand and take-up reel stand at any time.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of a conventional example, Fig. 2 is a block diagram of an embodiment of the present invention, Fig. 3 is a perspective view of the photosensor section of the same embodiment, and Figs. 4 and 5 are , is an explanatory diagram of the operation of the same embodiment. l・・・・・・Gear with cam, 4・・・・・・
...Supply reel stand, 5919113.11 Take-up reel stand, 21...First control lever, 22
．． 23... Main brake, 27...
・・・・・・Idler pulley, 30・・・・・・・・・
・Second control reno (-132...Motor,
35・°・・・・ Reel motor pulley, 38・・
......Lever, 40...Magnetic tape pull-out arm and post, 41.42...
...Footose/su. Patent applicant Matsushita Electric Industrial Co., Ltd. Figure 3 41 Figure 4 (A) Figure 5

Claims (1)

[Scope of Claims] A magnetic recording and reproducing device in which a magnetic tape is pulled out from a loaded tape cassette using a pair of drawer posts, wound around a rotating drum containing a magnetic head, and loaded, and is operated by the rotation of a gear with a cam. A pinch roller, which is disposed between the pinch roller and the take-up reel stand, and operates a pull-out post or the like for pulling out the above-mentioned tape and regulating the running of the tape at times other than fast forwarding, rewinding, or stopping. A first control lever and each main brake of the magnetic tape supply reel stand and take-up reel stand at any position during the process from the stopped state to the completion of loading, without being connected to the first control lever. 1. A magnetic recording and reproducing apparatus characterized in that a second control lever is provided for releasing the respective reel stands and rotating the idler pulleys by bringing them into contact with the reel stands.