JPH0244360Y2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Field of Industrial Application The present invention provides a magnetic recording and reproducing device that stably electromagnetically locks and unlocks the head board.

(b) Prior art There is a conventional method of electromagnetically locking the head board during performance, but in all of these methods, the solenoid itself is fixed and a metal piece (hereinafter referred to as a flapper) that is attracted to the solenoid is The provided lock plate is drawn to the solenoid by applying electricity, and the head board is moved and locked by the lock plate.

When the cassette is ejected, the solenoid is de-energized to release the flapper from adsorption, and the lock plate is moved to return the head board to the non-playing position.

However, this method of locking the head board has the following problems.

That is, since the flapper is attracted to the flapper located at a distance from the solenoid during performance, if the current is suddenly applied, the attracted surface of the flapper is not parallel to the attraction surface of the solenoid and may be repelled.

For this reason, a phenomenon equivalent to circuit chattering occurs, and the lock plate does not operate mechanically stably.Also, if other mechanisms are connected to the lock plate, the other mechanisms may become unstable due to the movement of the lock plate. There were times when it would work and then malfunction.

(c) Purpose of the invention The present invention has been made in view of the above points, and it is an object of the present invention to provide a mechanism for stably locking the head board in the playing position.

(d) Structure of the device The device is equipped with a lock plate that moves when changing modes, a lock plate that locks the lock plate and has a flapper, and a solenoid that attracts the flapper of the lock plate. During performance, the lock plate is positioned so that the flapper and the solenoid come into contact with each other, and when the performance is performed, the lock plate and solenoid are attracted by the energized solenoid and are energized against movement of the lock plate. It consists of a triggering means for triggering.

(e) Embodiment FIG. 1 is a plan view showing the magnetic recording and reproducing apparatus of the present invention in a non-playing state, in which numeral 1 shows a magnetic head 2 placed thereon;
This is a head board on which the first chassis shaft 3 is housed in the first elongated hole 4 so as to be slidable in the vertical direction, and is biased upward by a spring (not shown). Further, one end of the spring 5 is locked to the head board 1, and the other end of the spring 5 is locked to a shaft pin 7 housed in a second elongated hole 6 provided in the head board 1.

Next, reference numeral 8 denotes a first lock plate which is biased upward by a spring 5 which is engaged with a shaft pin 7 installed on the plane, and a second lock plate 2 which will be described later.
A lock step 9 is formed to be locked by a lock pin 30 implanted in the lock pin 30, and the first and second linear portions are arranged on one straight line across the lock step 9. 10
and 11 are configured.

The first locking plate 8 is always rotated counterclockwise by rotating the locking plate 13, which is normally rotated counterclockwise by the spring 12, clockwise by a reel shaft rotation stop detection mechanism (not shown). The drive gear 14 has two opposing toothless parts 15 and 1.
The partially toothed gear 17 having 6 is engaged and rotated clockwise.

Then, the protruding shafts 18 and 19 implanted in the partially toothed gear 17 come into contact with the play lever 21 which is rotated clockwise by a coil spring 20 stretched on the chassis, and the play lever 21 is rotated counterclockwise. When the play lever 21 is rotated, the protruding pin 22 attached to the play lever 21 presses the first lock plate 8 downward and causes it to slide.

As the first lock plate 8 slides downward, the shaft pin 7 implanted in the first lock plate 8 moves the edge of the second elongated hole 6 provided in the head board 1 downward. When pressed, the head board 1 is slid downward to set it at the performance position.

Next, 23 is the second and third chassis shafts 24 and 2.
5 is stored in the first and second storage holes 26 and 27,
It is mounted so as to be slidable in the left and right direction, and has a flapper 29 having a suction surface 28 at one end in the longitudinal direction as a pivot support 29', and is connected to the lock step 9 of the first lock plate 8 described above. The second lock plate is equipped with a locking pin 30 that is locked, and is always biased to the right by a chassis spring 31.When not playing, the head is connected to a fourth chassis shaft 32 installed in the chassis (not shown). Since the first lock plate 8, which is positioned by the shaft pin 7 housed in the second long hole 6 provided in the base plate 1, is in contact with the lock pin 30, it is biased to the right by the chassis spring 31. The position shown in FIG. 1 is also set.

33 is urged rightward by a spring member 34,
The fifth chassis shaft 35 and the sixth chassis shaft 36 are housed in a long groove 37, and the solenoid is placed on a movable plate 38 that is attached to be slidable in the left and right direction. The attracted surface 28 of the flapper 29 of the second lock plate 23, which is energized in the direction, is positioned so as to match the attracted surface 39 of the solenoid 33.

Next, the operation of the present invention having such a configuration will be explained. First, when a cassette is inserted from the non-playing state shown in FIG. 1, the flywheel (not shown) starts rotating, causing the drive gear 14 to rotate counterclockwise as shown by the arrow in the figure. At the same time, current is applied to the solenoid 33, and the attracted surface 28 of the flapper 29 and the attracted surface 39 of the solenoid 33, which match, are electromagnetically attracted and become one body.

Since the head board 1 has not yet reached the playing position, the reel shaft has stopped rotating, and the reel shaft rotation stop detection mechanism (not shown) is activated to move the locking plate 13 against the spring 12 and clockwise. direction to release the partially toothed gear 17. Then, the toothless portion 15 no longer faces the drive gear 14 due to the urging means (not shown) that urges the toothless gear 17 in the clockwise direction, and meshes with the gear portion of the toothless gear 17, so that the toothless gear 17 moves clockwise. rotated to As the partially toothed gear 17 rotates clockwise, the protruding shaft 19 comes into contact with the play lever 21, rotating the play lever 21 counterclockwise, and the protruding pin 22 pushes the first lock plate 8 downward. and moved. The first lock plate 8 is guided by the fourth chassis shaft 32 by the pressure of the projecting pin 22, and the movable plate 38 on which the integrated second lock plate 23 and solenoid 33 are mounted is urged rightward. The lock shoulder 9 presses the lock pin 30 to the left against the biasing force of the chassis spring 31 and the spring member 34, and moves the integrated second lock plate 23 and movable plate 38 to the left. (See Figure 2).

When the locking pin 30 enters the locking stepped portion 9, the second linear portion 11 provided on the first locking plate 8
Since the locking pin 30 arrives at the end, the second locking plate 23 and the movable plate 38 return to the non-playing position in an integrated state.

Further, the first locking plate 8 is locked by the second locking plate 23 and the locking pin 30 of the movable plate 38, which are integrated, so that the locking stepped portion 9 cannot return upward. Accordingly, the head board 1 is moved downward and locked in the performance position as shown in FIG.

Then, the solenoid 33 is
When the power is cut off and the playing state is stopped (for example, when the eject operation is performed), the attraction between the flapper 29 and the solenoid 33 is released, so the second lock plate 23 is biased to the right by the chassis spring 31. Since the force is only applied to the first lock plate 8,
The spring 5 that urges the head upward and the head board 1
The lock stepped portion 9 of the first lock plate 8 is defeated by the upward force applied by a spring (not shown) that applies the force upward.
pushes the lock pin 30 of the second lock plate 23 to the left, climbs over it and returns upward.

Then, the first linear portion 10 of the first locking plate 8 engages with the locking pin 30 again, so that the attracting surface 28 of the flapper 29 and the attracting surface 3 of the solenoid 33
9 matches again, the state is set to standby for performance, and the solenoid 33 is on standby for energization.

(f) Effects of the invention As described above, the present invention includes a lock plate that is moved as the mode is switched (in the above embodiment, the first lock plate 8 and below (the numbers in parentheses correspond to the configuration in the embodiment),
It is equipped with a lock plate (second lock plate 23) that locks the lock plate and has a flapper, and a solenoid (solenoid 33 and movable plate 34) that attracts the flapper of the lock plate. The locking plate is positioned so that the solenoid is in contact with the solenoid, and the locking plate and the solenoid are attracted by the solenoid which is energized during performance. and spring member 34), the locking plate and the solenoid are already in contact with each other when not being played, so when the solenoid is energized, the flapper does not cause mechanical chatter due to attraction, thereby preventing any mechanical malfunction. will not occur.

Furthermore, during performance, the locking plate is locked by electromagnetic attraction between the firing means and the solenoid, so that the solenoid does not require more current than necessary, resulting in a simpler circuit design.

[Brief explanation of drawings]

Fig. 1 is a plan view showing the magnetic recording and reproducing device of the present invention, Fig. 2 is a plan view used to explain the lock mechanism of the present invention, and Fig. 3 is a plan view showing the magnetic recording and reproducing device of the present invention during performance. FIG. 8... first lock plate, 23... second lock plate (lock plate), 29... flapper, 31... chassis spring (spring means), 33... solenoid,
34... Spring member (spring means), 38... Movable plate.

Claims (1)

[Scope of utility model registration request] A lock plate that moves when switching modes,
A locking plate that locks the locking plate and has a flapper, and a solenoid that sucks the flapper of the locking plate, and the locking plate is positioned so that the flapper and the solenoid are in contact with each other when not playing; A magnetic recording and reproducing device is provided with a springing means that integrates a lock plate and a solenoid, which are attracted by a solenoid that is energized during performance, and energizes the lock plate against movement.