JPS63166064A - Brake mechanism - Google Patents

Abstract

PURPOSE:To prevent dislocation of a tape by providing a reel brake releasing member capable of positioning such three functional positions as both side braking position, one side braking position and brake releasing position for releasing both reel brakes. CONSTITUTION:The position of the reel brake releasing member 3 is made to handle the three positions of both side braking position, one side braking position and brake releasing position, and the changeover for these positions is carried out by a mode changeover member. Under such circumstances, simultaneously with the mode changeover, a reel base 5T on the take-up side can certainly be brought under the braking condition and a reel base 5S on the supply side under the brake releasing condition at the tape loading time and unloading time. Consequently, the take-up of a tape and rewinding take place by the reel base 5S on the supply side only. In this way, the tape never drifts from its position at the time of play back from the stopping time and also ejecting time, thus improving the operability.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a brake mechanism used in magnetic recording devices such as tape players and video decks.

(Prior Art) In general, in a magnetic recording device that uses tape as a magnetic recording medium, the idler gear is engaged with the reel base to perform play mode and fast winding mode, while when stopping, the idler gear is moved from the reel base. At the same time as it is disconnected, the reel brake is pressed against the reel base.

On the other hand, in magnetic recording devices such as tape players and video decks that use rotating heads, which have been developed and put into practical use in recent years, a loading block is advanced to pull out the tape and wind it around the rotating head. A loading operation is performed, and when the tape loading is completed, the play mode is performed by meshing the idler gear with the reel base on the take-up side.

Therefore, since it is necessary to rotate the reel base during tape loading, the brake mechanism used in such a magnetic recording device is grooved so that the reel brake is released before this operation.

Further, at the time of stop and eject transition, an unloading operation is performed in which the loading block is moved back and the tape wound around the rotary head is rewound. This unloading operation is normally performed by rotating the reel base on the supply side in the winding direction.

As described above, in a rotating head type magnetic recording device, during an unloading operation, the tape wound around the rotating head is wound by the reel base on the supply side, and during a tape loading operation, the tape wound around the rotating head is taken up by the reel base on the supply side. As the block moves forward, the tape is pulled out from the reel base on the supply side. In this case, tape loading,
In any unloading operation, the brake is released, so not only the supply side but also the take-up side glue base rotates, and during tape loading when the reel base is not driven and the supply side glue
Since the rotation of the reel base on the take-up side is different from that during unloading when the reel base is driven, it is inevitable that the tape position during replay will deviate from the position before stopping. This poses a major operational problem compared to the case where a fixed head without tape winding is used, in which the replay position is the same as before the stop.

(Problems to be Solved by the Invention) As explained above, in a conventional magnetic recording device equipped with a rotating head, the reel brake is released during tape loading. Since the tape is wound and pulled out at different ratios at the base, there has been a problem in that the tape position is shifted during replay.

The present invention was proposed to solve the problems of the prior art, and its purpose is to provide a brake mechanism that can apply a brake to the reel base on the take-up side during tape loading and unloading. Highly operable magnetic recording that rotates only the reel base on the supply side during tape loading and unloading, and prevents the tape position from shifting when replaying after stopping or ejecting the tape. The goal is to realize the device.

[Structure of the Invention] (Means for Solving the Problems) The brake mechanism of the first invention has a reel brake release member that releases the reel brake at both brake positions where the reel brakes on both sides are brought into pressure contact with the reel base. , a brake position on one side that releases only the reel brake on the supply side, and a brake release position that releases the reel brakes on both sides, and a switch that allows the reel brake release member to switch between the three positions. The present invention is characterized in that it includes a member and a driving means for driving the switching member.

The brake mechanism of the second invention includes the same reel brake release member as the first invention, and switches the reel brake release member between three positions using a mode switching member, and roughly controls the drive of the mode switching member. It is characterized by the fact that it is carried out by a drive motor for tape loading.

(Function) According to the present invention having the above-described configuration, only the reel brake on the supply side is released during tape loading and unloading, so that the reel base on the take-up side remains in a braked state. Since the tape does not rotate, the tape can be drawn out or wound up using only the supply side glue base. Therefore, the 'day-1 position at the time of replay can always be the same as the position before stopping or ejecting.

In particular, the second invention has a configuration in which the position of the reel brake release member is changed by the mode switching member that performs mode switching, so that the brake can be reliably released without timing deviation when switching modes, and the configuration is Simplified.

(Embodiment) Among the present inventions as described above, one embodiment of the brake machine according to the second invention will be specifically described with reference to the drawings.

*Configuration of the Embodiment In FIGS. 1 to 4, reference numeral 1 denotes a mode switching member driven by a tape loading drive motor (not shown). The mode switching member 1 moves forward to the left in the figure, and moves from a cassette loading start position (Fig. 1), which is a backward position, to a stop position (Fig. 2), a tape loading operation position (Fig. 3), and a play position (Fig. 3). The reel brake switching member 2 is operated by the cam surface 1a provided on one side of the reel brake switching member 2, and the position of the reel brake release member 3 is switched via this. In addition, 2a in the figure is the shaft of the reel brake switching member,
2b is a cam pin that engages with the cam surface 1a.

The reel brake release member 3 is rotatably provided around @3a, and the shape of the cam surface 1a of the mode switching member 1 allows the mode switching member 1 to be moved to the cassette loading start position, which is the retracted position. At some point, as shown in FIG. 1, the cam pin 2b of the reel brake switching member 2 rides on the protrusion of the cam surface 1a, causing the engagement parts 3t and 3s on the take-up side and the supply side to be switched to each reel brake. 4T and 4S to release the brakes of the reel bases 5T and 5S on both sides. Second
As shown in the figure, the cam pin 2 of the reel brake switching member 2
By falling into the recess of the cam surface 1a, the reel brakes 4T and 4S take a brake position on both sides (the extreme end on the clockwise side in the figure) that does not prevent the reel bases 5T and 53 from being pressed against each other. When the mode switching member 1 is in the tape rope ink operating position, as shown in FIG. The reel base 5S on the supply side is released by engaging the engaging portion 3s only in the brake position, and the take-up side takes the brake position on one side, which maintains the brake state. ■The play position where the mode switching member 1 is in the forward position. When the reel brake switching member 2 is in the
When the cam pin 2b rides on the protrusion of the cam surface 1a, each engaging portion 3t, 3s on the take-up side and the ply side
Each reel brake 4T.

4S to take the brake release position (the farthest part on the counterclockwise side in the figure) where the brakes of the five reel bases and 5S on both sides are released.

In addition, the reel brake release member 3 and each reel brake 4T, 4S each have a spring 3b.

4t and 4s are applied in the braking direction, and the urging force applied to the reel brake release member 3 is larger. Further, the urging force applied to the reel brake release member 3 is applied to the cam pin 2b of the reel brake switching member 2.
It also serves as an urging force that presses the cam surface 1a of the mode switching member 1 against the cam surface 1a.

Functions of this embodiment The functions of this embodiment having the above-described configuration are as follows.

■ Cassette insertion → Tape loading operation Cassette ■ In the state before coding (ejection complete state), as shown in Fig. 1, the mode switching member 1 is in the backward position, which is the cassette loading start position, and the reel brake release member is in the cassette loading start position. 3 is in the brake release position,
The respective engaging portions 3t and 3s on the take-up side and the supply side are engaged with the respective reel brakes 4T and 4S, and the brakes of the reel bases 5T and 5S on both sides are released.

In this state, when a cassette is inserted, a cassette insertion detection means (not shown) functions, and each drive motor for cassette loading and tape loading starts operating.

As a result, the mode switching member 1 starts moving forward to the left in the drawing, and moves from the stop position shown in FIG. 2 to the tape loading operation position shown in FIG. 3.

In this tape [1-ding operating position, the reel brake release member 3 assumes one-sided braking position due to the action of the cam surface 1a of the mode switching member 1, so that the reel brake 4S on the supply side is released by the engaging portion 3S. While the brake is released, the take-up side is maintained in the brake state. In this state, the loading block (not shown) moves forward to pull out the tape and wrap it around the rotating head, but in this case, since the five reel bases on the take-up side are braked, the reel base on the supply side Only the reel base 5S rotates, and therefore the tape is drawn out only from the reel base 5S side.

After the tape loading operation is completed, the mode switching member 1 moves to the play position shown in FIG. 4, and the reel brake release member 3 takes the brake release position. The blade is released, and therefore the brakes of both reel bases 5T and 5S are released.

■Unloading operation When a stop command or an eject command is issued from the play position as shown in Figure 4, the drive motor for tape loading rotates in the opposite direction and the mode switching member 1 begins to move backward in the right direction in the figure. .

By this operation, the reel brake release member 3 also takes the braking position on one side as shown in FIG. 3 via the cam surface 1a, and the engagement portion 3t on the take-up side releases the restriction on the four reel brakes. While the four reel brakes come into pressure contact with the reel base five, the supply-side engaging portion 3S keeps the reel brake 4S in a released state.

In this state, the tape is rewound by retracting the loading block (not shown) and rotating the reel base 5S on the supply side, but in this case, the reel base 5S on the take-up side
Since the brake is applied to T, only the reel base 5S on the supply side rotates, and therefore only the loaded tape is rewound to the reel base 5S on the supply side.

When a stop command is issued, after the unloading operation is completed, the mode switching member moves to the stop position as shown in FIG.
is moved to the brake position by the urging force of the spring 3b, so the supply side reel brake 4S, which was in the brake release position, performs a braking operation, and the reel bases 5T on both sides.

The brakes are applied to 5S.

Furthermore, when an eject command is issued, the drive motor for tape loading roughly rotates, causing the mode switching member 1 to move from the stop position to the cassette loading start position, and at the same time, the drive motor for cassette loading rotates in the reverse direction. As a result, the cassette is ejected.

As explained above, in this embodiment, the reel brake release member 3 is set to three positions: a brake position on both sides, a brake position on one side, and a brake release position, and the switching of these positions is performed using a mode switching member. Because of this, during tape loading and unloading,
At the same time as mode switching, ensure that the reel base 5T on the take-up side is braked and the reel base 5S on the supply side
The brake can be released. Therefore, since the tape can be pulled out and rewound using only the reel base 5S on the supply side, the position of the tape does not shift even when stopped or when replaying after ejecting, making it possible to provide a device with high operability. .

*Other Examples It should be noted that the present invention is not limited to the above-mentioned embodiments, but may vary depending on the shape and arrangement of the reel brake release member, the reel brake, etc., and the relationship between the mode switching member and the reel brake release member. The connection structure and the like can be selected as appropriate, and the peripheral mechanisms such as the tape loading mechanism and the drive structure of the reel base can be freely selected.

[Effects of the Invention] As explained above, in the brake mechanism of the present invention,
Conventionally, there was a two-step switching between the brake position and the brake release position, but by adopting a three-step switching system that takes the brake position on one side, which releases only the reel brake on the Nobly side, it is possible to stop and release when replaying. It is possible to provide an excellent magnetic recording device in which the tape can be run from the same position as before ejection, thus improving operability.

[Brief explanation of the drawing]

The drawings are plan views showing one embodiment of the brake mechanism of the present invention, and FIG. 1 shows the cassette loading start position,
FIG. 2 shows the stop position, FIG. 3 shows the tape loading operation position, and FIG. 4 shows the play position. 1...Mode switching member, 1a...Cam surface, 2...
Reel brake switching member, 2a... shaft, 2b... cam pin, 3... reel brake release member, 3a...
Shaft, 3b...spring, 3t, 3s...engaging part,
4T, 43...Reel brake, 4t, /4s...
Spring, 5T. 5S...Reel base.

Claims (2)

[Claims] (1) In the brake mechanism that presses the reel brake against the reel bases on the take-up side and the supply side, a. The reel bases on the take-up side and the supply side. b. Reel brake that presses against the reel base. c. Provided to be able to engage the reel brake, there is a brake position on both sides that presses the reel brakes on both sides against the reel base, a brake position on one side that releases only the reel brake on the supply side, and a brake that releases the reel brakes on both sides. A reel brake release member that takes 3 positions including the release position. d. A switching member for switching the position of the reel brake release member. e. Drive means for driving the switching member. A brake mechanism characterized by having each of the requirements a to e above. (2) In the brake mechanism that presses the reel brake against the left and right reel bases, a. Reel bases on the take-up side and the supply side. b. Reel brake that presses against the reel base. c. Provided to be able to engage the reel brake, there is a brake position on both sides that presses the reel brakes on both sides against the reel base, a brake position on one side that releases only the reel brake on the supply side, and a brake that releases the reel brakes on both sides. A reel brake release member that takes 3 positions including the release position. d. A mode switching member that switches the position of the reel brake release member in each mode position at the same time as switching the mode. e. A tape loading drive motor that drives the mode switching member. A brake mechanism characterized by having each of the requirements a to e above.