JPH0687329B2 - Magnetic recording / reproducing device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic recording / reproducing apparatus used for a cassette type tape recorder or the like.

2. Description of the Related Art A conventional cassette type tape recorder is disclosed in, for example, Japanese Patent Publication Sho 60
When operating each button such as reproduction, fast-forward, rewind, and take-out as in Japanese Patent Publication No.-40100, the mechanism was switched using the driving force of the human hand. In addition, each button of the portable pocket-type tape recorder is an ON-OFF switch, and it does not require human driving force, and you can simply touch each button to play, fast-forward, rewind, eject, etc. In some cases, the operation can be performed from a position remote from the tape recorder.

However, in the above-mentioned conventional example, there is a problem that the operation cannot be performed from a position far away from the tape recorder in the case of using a human driving force. Further, in the conventional pocket type, it is not possible to perform reproduction, fast-forwarding, and rewinding with a single motor, and a plunger and other holding mechanism are required in addition to the motor, and the number of parts is large. There was a problem in terms of cost and reliability.

The present invention solves the above-mentioned conventional problems and is excellent in that the operation of the tape recorder can be performed with a small force or from a remote location, and the reproduction, fast forward, and rewind operations can be performed by driving only one motor. It is an object to provide a magnetic recording / reproducing device.

Means for Solving the Problems In order to achieve the above object, the present invention provides a center gear that is driven by a motor through a transmission mechanism, and revolves around a center gear that meshes with the center gear and revolves around the center gear. During rotation, the planetary gear meshes with the take-up reel base gear, and when the motor rotates in the reverse direction, the planetary gear meshes with the delivery reel base gear, the internal gear that meshes with the planetary gear during revolution, and the planetary gear that rotates during revolution. The switching lever, the slide plate that is horizontally slid by the rotation of the switching lever, and the movement of the slide plate,
The magnetic head and the head base for moving the pinch roller forward or backward are provided.

Operation The present invention having the above-described configuration has the following operations. That is, when the motor rotates in the normal direction, the rotation of the center gear causes the planetary gear to mesh with the internal gear and revolve clockwise. The switching lever is rotated by the revolution of the planetary gears, the slide plate is moved to one end, and the head base is advanced by the pin inserted into the cam portion formed on the slide plate. When the planetary gear further continues to revolve, the switching lever deviates from the planetary gear and is slightly rotated by the spring in the opposite direction to the above, and is again positioned within the revolution path of the planetary gear. The planet gear meshes with the reel base gear on the tape winding side, and the recording / reproducing mode is set.

Next, to set the tape fast-forward mode, when the motor is rotated in the reverse direction, the planetary gear revolves counterclockwise, the switching lever rotates, the slide plate moves to the intermediate position in the opposite direction, and the head base moves. fall back. When the motor is switched to the normal rotation at this point, the planetary gear revolves clockwise again, meshes with the reel take-up reel base gear, and enters the tape fast-forward mode.

Next, to set the tape rewind mode, in the same way as above, when the motor is rotated in the reverse direction, the planetary gear revolves counterclockwise and the switching lever rotates, the slide plate moves to the other end, and the head base moves. Moves forward just before the forward end. When the planetary gear continues to revolve, the switching lever deviates from the planetary gear and is slightly rotated by the spring in the opposite direction to the above-mentioned position so that the switching lever is again positioned within the revolution path of the planetary gear. The planetary gear meshes with the tape feed-side reel base gear, and the tape rewind mode is set.

To further stop the device, when the motor is switched to normal rotation, the planetary gear revolves clockwise and the switching lever rotates, the slide plate moves to the intermediate position, and the head base retracts. At this point the motor is stopped.

Embodiment FIG. 1 is an exploded perspective view showing the structure of an embodiment of the present invention. In FIG. 1, 11 is a chassis, and shafts 12, 13, 1
4, 15, 16, 17 are fixed upward, the shaft 18 is fixed downward, and the housing 19 is fixed.

Reference numeral 20 denotes a slide plate, which has elongated holes 21a and 21b formed therein, into which shafts 12 and 13 are inserted and which are supported by the chassis 11 so as to be horizontally movable. A pin 22 is fixed to the lower surface of the slide plate 20, and the pin 2 is inserted into a cutout hole 33 formed in a switching lever 32 described later.

Reference numeral 23 denotes a head base, which has elongated holes 24a, 24b, and 24c formed therein.
It is supported so that it can move horizontally. A pin 25 is fixed to the lower surface of the head base 23, and the pin 25 is attached to the slide plate 20.
It is inserted in the cam portion 26 formed in the.

A magnetic head 27 is fixed to the head base 23. A pinch roller 28 is rotatably supported by the head base 23. 29 is a protrusion, and the protrusion 29 is a spring
One end of 30 is hung. The other end of the spring 30 is the chassis 11
It is hung on the protrusion 31 formed on the
Is urged in the direction of arrow A.

A switching lever 32 is rotatably supported by the shaft 18. The switching lever 32 has a cutout hole 33 into which the pin 22 is inserted. 34 is a protrusion, and one end of a spring 35 is hooked on the protrusion 34. The other end of the spring 35 is hooked on a protrusion 36 formed on the chassis 11, and the switching lever 32 is biased in the direction of arrow B.

Reference numeral 37 denotes an internal gear, which has a hole 38 and protrusions 39a and 39b formed therein, and is inserted into the shaft 18 and the square holes 40a and 40b, respectively, and the chassis 1
It is fixed at 1.

Reference numeral 41 denotes an arm, which is rotatably supported by the chassis 11 by the housing 19. A shaft 42 is fixed to the free end of the arm 41. 43 is a planetary gear, which is rotatably supported by the shaft 42 and is urged upward in the axial direction by a spring (not shown).

A capstan shaft 44 is inserted into the housing 19 and is rotatably supported by the chassis 11. A flywheel 45 is press fitted into one end of the capstan 44. A center gear 46 is formed on the upper stage of the flywheel 45.

47a and 47b are reel base gears, which are rotatably supported by shafts 16 and 17, respectively. The reel base gears 47a and 47b have a slip mechanism (not shown) between the reel base gears 47a and 47b and the pawls that engage with the reel hub of the cassette.

A motor 48 is fixed to the upper surface of the chassis 11. A pulley 49 is fixed to the output shaft of the motor 48,
Between the pulley 49 and the aforementioned flywheel 45, the belt 50
Is hung.

Next, the operation of the above embodiment will be described. In FIG. 2, when the motor 48 rotates in the direction of arrow C (normal rotation), the center gear 46 rotates via the belt 50, and the planetary gear 43
Revolves around the center gear 46 in the direction of arrow D while meshing with the internal gear 37 and rotating. At this time, the shaft 42 contacts the switching lever 32, and the switching lever 32 rotates in the direction of arrow E about the shaft 18. This results in a notch hole
The slide plate 20 moves in the direction of arrow F via 33 and the pin 22, the pin 25 is restricted by the cam portion 26, and the head base 23 advances.

As shown in FIG. 3, when the planetary gear 43 revolves and the shaft 42 comes off the tip end of the switching lever 32, the slide plate 20
Moves to the positions where the ends of the long holes 21a and 21b reach the shafts 12 and 13, respectively. Further, when the planetary gear 43 revolves in the direction of the arrow D, the switching lever 32 moves the spring 35 as shown in FIG.
As a result, the shaft 18 rotates about the shaft 18 in the direction of the arrow G, and one end of the notch hole 33 abuts the pin 22. As a result, the tip of the switching lever 32 is positioned within the rotation locus of the shaft 42. At this time, the planetary gear 43 is the reel base gear b on the tape winding side.
, The pin 25 is regulated by the cam portion 26, and the head base 23 is located at the forward end.
28 is pressure-bonded to the capstan shaft 44, and is in the recording / playback mode.

Next, in order to set the tape fast-forward mode, as shown in FIG. 5, the motor 48 is rotated (reversely rotated) in the direction of the arrow H.
The planetary gear 43 revolves in the direction of arrow I while meshing with the internal gear 37 and rotating. At this time, the shaft 42 comes into contact with the tip of the switching lever 32, and the switching lever 32 moves around the shaft 18 in the direction of arrow G.
Rotate in the direction of. The slide plate 20 moves in the direction of the arrow J via the notch hole 33 and the pin 22. The planetary gear 43 is the fifth
When the motor 48 is switched to the normal rotation when the position shown in the figure is reached, the planetary gear 43 revolves in the direction of the arrow D again and meshes with the reel take-up reel base gear 47b as shown in FIG. . At this time, the pin 25 is located in the middle of the cam portion 26, the head base 23 is biased to the retracted position by the spring 30, and the tape fast-forward mode is set.

Next, in order to set the tape rewind mode, as shown in FIG. 7, the motor 48 is rotated (reversely rotated) in the direction of the arrow H.
The planetary gear 43 revolves in the direction of arrow I, and the shaft 42 causes the switching lever 32 to rotate about the shaft 18 in the direction of arrow G.
The slide plate 20 moves in the direction of arrow J through the notch hole 33 and the pin 22. When the shaft 43 comes off the tip of the switching lever 32, the slide plate 20 moves to a position where the other ends of the elongated holes 21a and 21b reach the shafts 12 and 13, respectively. Further planetary gear 43
When revolves around, as shown in FIG. 8, the switching lever 32 rotates about the shaft 18 in the direction of arrow E by the spring 35,
The other end of the cutout hole 33 contacts the pin 22. As a result, the tip of the switching lever 32 is positioned within the rotation locus of the shaft 42. Further, at this time, the planetary gear meshes with the tape feeding side reel base gear 47a, the pin 25 is restricted by the cam portion 26, the head base 23 is positioned slightly before the forward end, and the pinch roller 28 Is slightly separated from the capstan shaft 44, and the tape rewinding mode having a cueing function is set.

Next, when stopping the device, start the motor from the state shown in FIG.
When 48 is switched to normal rotation, the planetary gear 43 revolves, the shaft 42 contacts the switching lever 32, and the switching lever 32 rotates about the shaft 18 to attain the state shown in FIG. At this time, the slide plate 20 is moved to the intermediate position through the notch hole 33 and the pin 22, and the head base 23 is at the retracted position. At this point, the motor 48 is stopped.

EFFECTS OF THE INVENTION As is apparent from the above embodiment, the present invention is such that the tape running mode is switched only by switching the forward rotation and the reverse rotation of one motor without using a driving force such as a solenoid. It has the advantage of being simpler, smaller and cheaper.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing the structure of an embodiment of the present invention, and FIGS. 2 to 8 are plan views showing an operating state. 11 …… Chassis, 20 …… Slide plate, 23 …… Head base, 32 …… Switching lever, 37 …… Internal gear, 43 …… Planet gear, 46 …… Center gear, 47a, 47b …… Reel base gear, 48 …… Motor.

Claims (1)

[Claims] 1. A center gear driven by a motor through a transmission mechanism, meshes with the center gear, meshes with a take-up reel base gear at the time of recording / reproducing and fast-forwarding the tape, and reversely rotates the motor at the time of rewinding the tape. A planetary gear that revolves around the center gear and meshes with the delivery-side reel base gear, an internal gear that meshes with the planetary gear during the revolution of the planetary gear, and a planetary gear that rotates during the revolution. A magnetic recording / reproducing apparatus including a switching lever, a slide plate that is horizontally slid by rotation of the switching lever, and a head base that advances or retracts a magnetic head and a pinch roller by moving the slide plate.