JPS6138111Y2 - - Google Patents

Description

[Detailed description of the invention] This invention allows operation switching from a pause state (a pause with the magnetic head for reproduction in contact with the tape) to a playback operation state, or vice versa, with a one-touch operation. The present invention relates to a magnetic reproducing device that can perform

Hereinafter, details of the present invention will be explained based on illustrated embodiments. In this embodiment, the present invention is applied to a cassette type tape recorder, and FIG. 1 is a plan view showing the schematic structure of the tape recorder.
In Fig. 1, 1 is a base, 2 and 3 are a take-up reel shaft and a rewind reel shaft respectively mounted on the top side of the base 1, and 4 is a capstan shaft mounted on the top side of the base 1. be. These shafts 2, 3, and 4 are driven by driving means (not shown) mounted on the back side of the base 1. Reference numeral 5 denotes a magnetic head mounting plate mounted on the upper surface of the base 1. This mounting plate 5 is guided by guide pins 6a and 6b fixed to the base 1 so as to be able to move forward and backward.
a and 7b, it is biased from the reproducing operation position toward the stop position. A recording/reproducing head 8 and an erasing head 9 are attached to the upper surface of the mounting plate 5. Further, a pinch arm (pinch roller support member) 10 is mounted on the upper surface of the base 1 so as to be rotatable about a shaft 11, and a pinch roller 12 is supported at the rotation end of the pinch arm (pinch roller support member) 10. A deployment spring 13 is attached to the shaft 11, and both ends of the spring 13 are locked to the inner surfaces of the front and rear walls of the pinch arm 10. In addition, the pinch arm 10 has an engaging portion 10a formed by cutting and raising a portion of the rear side wall into a hook shape.
A pressing pin 14 a fixed to one end of a rotating lever (engaging member) 14 is interposed between the spring 13 and one end of the spring 13 . This rotating lever 14 is rotatably attached to a shaft 14b whose intermediate portion is fixed to the mounting plate 5, and is always biased clockwise by a deployment spring 14c attached to this shaft 14b. . A disc-shaped reel stand 2a, 3a is provided at the base end of each of the reel shafts 2, 3. In the figure, reference numeral 15 denotes a brake plate as a brake member, and this brake plate 15 has the central guide groove 16, into which the shaft 17 fixed to the base 1 is inserted to attach the magnetic head mounting plate. It can move forward and backward in the same direction as 5. The expansion spring 18 wound around the shaft 17 normally urges the left and right arms 15a, 15b forward to the respective reel stands 2.
a, 3a are pressed against each other. The amount of rearward movement of the brake plate 15 is determined by a stopper 19 fixed to the base 1.
regulated by. On the upper surface of the magnetic head mounting plate 5, an interlocking plate 20 is located below the recording/reproducing head 8 and in front of the other end of the rotating lever 14. It is attached so that it can move forward and backward in the same direction. In the figure, 20a is a long hole provided in the interlocking plate 20;
20b is a guide pin that fits into a long hole 20a fixed to the mounting plate 5 and guides the interlocking plate 20 in the forward and backward directions.

A first electromagnetic plunger 21 constituting head moving means and a second electromagnetic plunger 22 for moving the brake plate 15 and the pinch roller 12 are mounted on the back side of the base 1. Both plungers 21 and 22 are connected to respective movable iron cores 21a and 22a.
The moving direction of the magnetic head mounting plate 5 is made to match the moving direction of the magnetic head mounting plate 5, and drive pins 21b and 22b are fixed to each movable core 21a and 22a, respectively. One plunger (first electromagnetic plunger)
The drive pin 21b 21 is engaged on the back side of the base 1 with one end of a drive lever 23 that rotates about the shaft 17 as a fulcrum. Also, the drive pin 2 of the other plunger (second electromagnetic plunger) 22
2b is inserted through a long hole 24 provided in the base 1 and is fixed to the center portion of the back surface of the brake plate 15 on the upper surface side of the base 1. The magnetic head mounting plate 5
An engagement pin 25 is fixed to the lower surface of the pin 2.
5 is inserted through a long hole 26 provided in the base 1 and positioned in front of the other end of the drive lever 23.

Next, the operation of this tape recorder will be explained based on FIGS. 2 and 3. Note that Figure 2 is the same as Figure 1.
In the stopped state shown in the figure, the first electromagnetic plunger 21
It shows the pause state when electricity is applied to the third
The figure shows the operating state when the second electromagnetic plunger 22 is further energized in the state shown in FIG.

First, when the first electromagnetic plunger 21 is energized in the stopped state shown in FIG. 1, the movable core 21a of the plunger 21 moves downward in the figure (in the direction of arrow A), and the drive pin 21b moves the drive lever 23 counterclockwise. Rotate to. As a result, the drive lever 23
presses the engagement pin 25 and attaches the magnetic head mounting plate 5.
is pushed toward the playback or recording operation position shown in FIG. 2 (in the direction of arrow B), and the magnetic heads 8 and 9 are brought into contact with the magnetic tape 27 in the cassette (not shown). Also, the pressing pin 1 of the rotating lever 14 mounted on the mounting plate 5
4a presses one end of the deployment spring 13 to push the rotating end of the pinch arm 10 forward, thereby positioning the pinch roller 12 near the capstan shaft 4 (see FIG. 2). In this case, the pinch roller 12 is separated from the capstan shaft 4, and both reel shafts 2 and 3 are prevented from rotating by the brake plate 15, so the magnetic tape 27 does not run and is in a so-called pause state. There is.

Next, when the second electromagnetic plunger 22 is energized in the pose state shown in FIG. move in the same direction until it touches. At this time, the interlocking plate 20 approaches the brake plate 15 as the mounting plate 5 moves forward, so when the brake plate 15 moves in the direction of arrow C, the rear end of the interlocking plate 20
is pushed back, and the rotating lever 1 is pushed back via this interlocking plate 20.
Push 4 counterclockwise. As a result, the pressing pin 14a of the rotating lever 14 presses the deployment spring 13, pushing the pinch arm 10 further beyond the position shown in FIG. . (See Figure 3 above). At this time, the pressing force of the pinch roller 12 against the capstan shaft 4 is applied by the deployment spring 13. When the capstan shaft 4 and the take-up reel shaft 2 are driven to rotate in this state, the tape 27 is wound onto the take-up reel at a constant speed set by the capstan shaft 4, and playback or recording begins. state.

Furthermore, if the second electromagnetic plunger 22 is de-energized in the regeneration operation state shown in FIG.
is brought into pressure contact with each reel stand 2a, 3a, and at the same time,
The pinch roller 12 is slightly separated from the capstan shaft 4 to become the state shown in FIG. 2, and the state is changed to the pause state.

Therefore, according to this tape recorder, the pause state is achieved by energizing only the first electromagnetic plunger 21, and the playback or recording operation state is achieved by further energizing the second electromagnetic plunger 22. By selectively energizing the two plungers 22, the operation can be switched from the pause state to the playback or recording operation state, or vice versa, with a single touch operation. In the pause state, the rotation of the reel shafts 2 and 3 is prohibited by the brake plate 15, so that the tape feeding stop position and the next feeding start position do not deviate. Therefore, for example, when writing while listening to the information recorded on the tape 27 in the playback mode, it is necessary to pause the tape 27 at appropriate times and play back little by little in accordance with the writing speed to ensure that the recorded information is written down reliably. Can be done.

Note that the present invention is not limited to the illustrated embodiment and can be modified in various ways. For example, in the embodiment, an electromagnetic plunger is used as the head moving means, but it is also possible to adopt a mechanical operating means as the head moving means and operate it by pushing a button. The present invention can also be applied to playback-only machines that cannot perform recording operations.

As described in detail above, according to the present invention, it is possible to provide a magnetic reproducing device that can switch the operation from the pause state to the reproducing operation state, or vice versa, with a single touch operation.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is a plan view showing a cassette tape recorder in a stopped state, FIG. 2 is a plan view showing the tape recorder in a paused state, and FIG. FIG. 3 is a plan view showing a playback or recording operation state of the recorder. DESCRIPTION OF SYMBOLS 1... Base, 2... Take-up reel shaft, 3... Rewind reel shaft, 4... Capstan shaft, 5... Magnetic head mounting plate, 8... Recording/playback head, 12...
Pinch roller, 15...Brake plate (braking member), 2
1...First electromagnetic plunger (head moving means), 22... Second electromagnetic plunger.

Claims (1)

[Claims for Utility Model Registration] (1) A reel shaft, a magnetic head mounting plate, and a capstan shaft are mounted on a board, and a pinch roller that moves toward and away from the capstan shaft is mounted via a support member, and the magnetic head is mounted. In a magnetic reproducing device that moves the plate forward and backward and moves the pinch roller toward and away from the capstan shaft to switch from a stopped state to a reproducing operating state, or vice versa, the magnetic head mounting plate is always biased toward the stop position. a return spring that moves the magnetic head mounting plate forward from the stop position to the playback operation position; and a spring force that is attached to the base plate so as to be able to move forward and backward to contact the reel shaft and put the reel shaft in a braking state. a braking member held in the
A movable part is connected to this braking member, and when energized, the electromagnetic plunger separates the braking member from the reel shaft to release the braking state of the reel shaft, and the magnetic head mounting plate is provided so that it can move forward and backward. An interlocking plate moves under the force of a braking member that moves in the direction of releasing the brake relative to the reel shaft when in the operating position, and the interlocking plate is rotatably attached to a fulcrum shaft provided on the magnetic head mounting plate, and one end is interlocked. The plate and the other end engage with the support member of the pinch roller, and when the magnetic head mounting plate moves from the stop position to the playback operation position, the pinch roller support member is pressed and the pinch roller is moved to a position near the capstan shaft. and an engaging member that is pushed by an interlocking plate that moves under the force of a braking member and presses a pinch roller support member at one end to press the pinch roller against a capstan shaft. . (2) The magnetic reproducing device according to claim 1, wherein the head moving means is an electromagnetic plunger.