JPH0127143Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates in particular to a queue or review operating mechanism of a tape recorder.

Most of the conventional queue/review operating mechanisms utilize a driving assist cam of the head board to move the head board backward during queue/review.

However, this mechanism had the drawback that the transition from Play to Queue to Review was not smooth. Therefore, in this invention, an assist cam is provided for the play and review, allowing the user to transition from play to play and review in a timely manner.

First, details of the embodiment will be described with reference to the drawings.

Reference numeral 1 denotes a machine base, and 2 a head board supported by the machine base so as to be movable back and forth.A recording/reproducing head 3 and an erasing head 4 are attached to this head board 2 in the usual manner.

The U-shaped spring 5 is attached to the head board 2 so that its opposing spring rod parts 5a and 5b face the forward and backward sides of the head board 2, respectively, and the released end faces outward. The roller shaft 6a of the pinch roller arm 6 rotatably provided on the machine base is sandwiched between the spring rod portion 5a and the protruding portion 2a provided on the head board 2, and the spring rod portion 5b on the retreat side The distal end pushing end 8a of the first assist arm 8, whose base end is rotatably provided on the machine base by a shaft 7, is brought into contact with the first assist arm 8. Note that 9 is the degree for regulating the opening of the U-shaped spring.

The head board 2 has a guide groove 2b in the front and back direction.
is provided, and an idler gear G is provided in this guide groove 2b.
The protruding piece 10a of the idler arm 10 having the head plate is engaged with the idler arm 10, and the arm 10 is connected via a spring so as to be able to follow the back and forth movement of the head board. Further, the idler arm 10 is provided with a protrusion 10b, and the tip pressing portion 12a of the second assist arm 12 whose midway portion is pivoted to the machine base via the shaft 11 is exposed to the protrusion 10b. Another pressing part 12b is provided on the head board 2, and this pressing part 12b is attached to the head board 2.
so that it can be freely pressed against the front edge of the

A supply reel 13 and a take-up reel 14 are arranged on the front left and right sides of the idler gear G, and between the two reels 13 and 14, a first drive gear G ₁ that meshes with the idler gear G and the supply reel 13 are arranged. A switching lever 16 is interposed with a second driving gear G ₂ that meshes with the switching lever 16 , and both gears G ₁ and G ₂ are pivoted at their base ends by a fulcrum shaft 15 .
A pin 16a is provided at the sliding end of the switching lever 16 to engage with and disengage from a notched U-shaped engagement portion 10c provided in the idler arm 10, and the pin 16a engages and disengages from the notched U-shaped engagement portion _10c provided in the idler arm ₁₀ . The meshing between the reels 13 and 14 is controlled. In addition, the above 1st,
A pulley 17 is provided coaxially with the second drive gears G ₁ and G ₂ , and this pulley 17 and a pulley 19 of the capstan shaft 18 are connected via a belt 20 .

Further, a seesaw spring 21 is connected to the switching lever 16, and a REW lever 22 and an FF lever 23 are made to face the left and right sides of this spring 21 so as to be freely pressable. Note that 24 is a stopper for regulating the opening of the seesaw spring 21.

A pinion 25 rotated by a motor M is provided coaxially with the capstan shaft 18 as shown in FIG. the pin 8a of the first assist arm 8 to the first assist cam 26, and the pin 8a of the first assist arm 8 to the first assist cam 26.
7 to follow the pins 12c of the second assist arm 12, respectively.

Further, the first and second assist cams 26 and 27 are respectively formed with protrusions 26a and 27a for regulating the stop position, and shafts 28a and 2 are attached to the protrusions with the intermediate portions as a base.
One end pins 28b and 29b of the triggers 28 and 29 pivoted at 9a are brought into contact with each other in a detachable manner, and one trigger 28 has an RLAY lever 30 and a REC
The levers 31 are brought into contact with each other so that they can be activated freely, and the pause lever 32 and the above-mentioned levers are attached to the other trigger 29.
Bring the FF lever 23 and the REW lever 22 toward each other. Note that the first and second assist cams 26, 27
is always urged to rotate clockwise by an appropriate means when its toothless portion faces the pinion 25, and the pins 28b, 29b and their corresponding protrusions 2
6a and 27b are engaged to regulate the stopping positions of the first and second assist cams.

The operation will be described below.

PLAY (REC) operation (Fig. 3) In the stopped state shown in Figs. 1 and 2, press the PLAY lever 3.
0. When the REC lever 31 is pressed, the trigger 28 rotates clockwise, thereby removing the pin 28b of the trigger 28 from the protrusion 26a of the first assist cam 26, so that the first assist cam 26 is no longer driven. The first assist lever 8 rotates in mesh with the pinion 25, and as a result of this rotation, the first assist lever 8 rotates counterclockwise, and one spring rod portion of the U-shaped spring 5 faces which the pushing end 8a of the first assist lever 8 faces. 5b, the head board 2 moves forward, and as this advances, the pinch roller arm 6 is also sequentially moved, and the pinch roller contacts the capstan shaft 18, and the head board 2 continues to move forward in this state of contact. At this point, the other spring rod portion 5a of the U-shaped spring 5 is forcibly bent, thereby maintaining the pressing force of the pinch roller against the capstan shaft 18 necessary for scanning the tape.

On the other hand, as the head board 2 moves forward, the idler arm 10 also moves forward, and the idler gear G on this arm meshes with the first drive gear _G1 and the take-up reel 14 to wind up the tape and enter the PLAY (REC) state. . In this case, the engaging portion 10 of the idler arm 10
Hold the pin 16a of the switching lever 16 at position c.

Review operation (Fig. 4) In the PLAY state shown in Fig. 3 above, when the FF lever 23 and REW lever 22 are pressed, the trigger 29
, the second assist cam 27 rotates, and the second assist arm 12 rotates counterclockwise around the fulcrum shaft 11, and this rotation causes the tip pressing portion 12a of the second assist arm 12 to rotate. The protrusion 10b of the idler arm 10 is pushed to separate the idler gear G from the take-up reel 14, and the other pressing portion 12b of the second idler arm 12 pushes back the head board 2.

During this retraction, the protruding piece 2a of the head board 2 pushes down the pinch roller arm 6, separating this roller from the capstan shaft 18, and furthermore, the pin 16a of the switching lever 16 is released from the engaging portion 10c of the idler arm 10. After disengaging and waiting for the gear G and take-up reel 14 to disengage, the switching lever 16 rotates counterclockwise around the fulcrum shaft 15, and as a result of this rotation, the switching lever 16 2
The drive gear _G2 meshes with the supply reel 13, and the review state is reached.

In addition, in the case of Kyu, the process is exactly the same, only
The switching lever 16 rotates depending on whether the FF lever 23 or the REW lever 22 is pressed. Pause is the same process, but in the case of pause, the REW lever 22 and FF lever 23 are not pushed up even if the pin 16a of the switching lever 16 is separated from the engaging portion 10C of the idler arm 10, and the REW lever 22 and FF lever 23 are not pushed up.
Since it is guarded by the FF lever 23 and does not rotate,
Don't be a review or queue.

As described above, according to the present invention, in a tape recorder that records and plays back tape by moving the head board forward, a dedicated assist cam that is rotated by the cue or review operation is provided and engaged with this cam. A locking portion is provided on an idler arm that supports an idler gear that causes the head board in the forward state to move backward by the swinging of the assist arm, and that follows the movement of the head board and transmits the rotation of the drive gear to the reel. , Since a pin is provided on the switching lever that switches the drive gear mentioned above, Play
It has the advantage of being able to transition from QU to REVIEW in a timely manner.

[Brief explanation of the drawing]

FIG. 1 is a plan view of the tape recorder, FIG. 2 is a plan view of the same drive system, and FIGS. 3 and 4 are plan views of the same operating state. 2...Head board, 27...Assist cam, 1
2...Assist arm.

Claims (1)

[Scope of utility model registration request] In a tape recorder that records and plays back tape by advancing a head board having a head, an assist cam is provided which rotates when a cue or review operation is performed, and the swing of an assist arm connected to this cam causes the head board to move forward. an idler arm configured to move backward and follow the movement of the head board, the idler arm carrying an idler gear that meshes with a drive gear to which power of the motor is transmitted, and provided with an engaging portion; On the other hand, the switching lever that carries the drive gear and is swung by the queue or review operation is provided with an engaged part that engages with the engaging part provided on the idler arm, so that regeneration is possible. In this state, the rotation of the drive gear is transmitted to the take-up reel via the idler gear, and the position of the switching lever is maintained by the engagement between the engaging part and the engaged part, During the review operation, the idler arm is retracted together with the head board, thereby disengaging the idler arm from the switching lever, causing the switching lever to swing, causing the rotation of the drive gear to change as described above. A tape recorder characterized by having a switching means for transmitting information to a take-up reel or a supply reel without using an idler gear.