JPS5931790B2 - Rewind fast forwarding device in cassette tape recorder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tape rewind and fast forward operating device particularly suitable for extremely compact tape recorders.

In recent years, in place of writing down the contents of conferences, lectures, etc., many convenient recording methods have been adopted in the market, such as recording directly on a tape recorder.

Considering such uses, consumers desire tape recorders that are small and lightweight, easy to operate, reliable in operation, and inexpensive. Furthermore, in order to conveniently manipulate and replay a desired portion of the tape, it is necessary to provide a review mechanism that allows rewinding in the playback state, and a cue mechanism that allows fast forwarding in the playback state. Based on these demands, various types of ultra-compact tape recorders have recently been proposed. The reality is that a compact tape recorder that is expensive and low in price has not yet been developed. In order to have functional requirements equivalent to those of a large cassette tape recorder, and to reduce the overall volume to approximately 100 to 200 yen, it is necessary to miniaturize each individual component and further improve its precision. Furthermore, the assembly work of each component becomes more complicated and difficult, leading to higher costs, making it extremely difficult to provide a compact tape recorder at a low price.

Furthermore, many of the conventional small tape recorders are modeled after the structure of large cassette tape recorders, so when each part becomes ultra-small, automatic assembly and adjustment becomes extremely difficult, requiring most of the work to be done manually by workers. This has become a major obstacle in terms of improving accuracy and reducing costs. The present invention improves the above-mentioned problems in manufacturing a small tape recorder, provides the desired conditions for a tape recorder, and allows various operations to be performed extremely easily with one hand.Furthermore, the main operation board is made of die-cast aluminum. The pillar fixing boss is made of synthetic resin and integrally molded onto a substrate made of aluminum or stainless steel, making automatic assembly easy as most parts can be inserted from one direction of the substrate. In addition, it is an object of the present invention to provide a tape rewinding and fast forwarding operation device for a micro-sized cassette table recorder, which has a simplified overall configuration, is inexpensive, and can perform various operations reliably.

The drawings showing the embodiments of the present invention will be explained below.
In FIGS. 1 and 2, reference numeral 1 denotes a pocket into which a force setting tape (not shown) is inserted, and the pocket 1 has a transparent window 2 for monitoring the traveling state of the tape.

3 is the second case Jl. 4 is a recording button, 5 is a stop button, and 6 is a rewind and fast forward lever, and although not shown, other equipment such as an earphone jack, mark jack, and volume adjustment knob are also provided.

Before explaining the detailed internal configuration of the tape recorder, we will briefly explain the operation procedure of the above-mentioned power set tape recorder.
First, when the stop button 5 is pushed in the direction A, the pocket 1 into which the force setting tape is inserted opens. After inserting the prepared cassette tape into the pocket 1, when the pocket 1 is pressed and closed, the cassette tape is placed in the specified position. It is installed in the position of

Assuming that this force setting tape has been previously recorded, when it is to be played back, the playback button 3 is pressed in the direction A to enter the playback state. When the rewind fast-forward lever 6 is pushed in the direction B during playback, the pinch roller is removed from the capstan as will be described later, and at the same time, the reel drive shaft on the supply side is reversed to perform rewinding while playing back. (Review operation) When the rewind/fast forward lever 6 is pushed in the C direction, fast forwarding is performed while the rewinding state is maintained. (One key operation) When the tape is to be stopped, the stop button 5 is pushed in the direction B, and the playback button 3 returns to its original position and enters the stopped state. Next, the recording operation will be explained.

When recording, the recording state is entered by pressing the record button 4 and the playback button 3 at the same time in the A direction. In this case, record button 4
are arranged on the same plane within the corner window 7 of the playback button 3, so when the record button 4 is pressed, the playback button 3 is actually moved at the same time, making it easy to perform recording operations with just one finger. I can do it. Additionally, there are generally two types of power set tapes: tapes that can be used for recording, and tapes that should not be erased by the recording operation.In order to distinguish between these tapes, a fin is provided on the power set to prevent valuable recordings from being made by mistake. It is possible to prevent the data from being erased. That is, the fins are cut off from tapes where recordings should not be erased, and the fins are removed from tapes where recordings can be made. The force set tape recorder according to the present invention is also provided with an erroneous erasure prevention mechanism for detecting the presence or absence of the fin and preventing erroneous erasure. Furthermore, when the rewind fast-forward lever 6 is pushed in the direction of B in the recording state, the playback button 3 remains at X and only the record button 4 returns to its original position, resulting in the above-mentioned review state, and the rewind fast-forward lever 6 is moved to the center. It has a convenient operation mechanism that allows you to immediately play back the recorded content, such as when you return it to the playback state. Further, in this recording state, even if the rewind fast-forward lever 6 is pushed in the C direction, there is no need for a so-called cue operation, so the rewind fast-forward lever 6 is prevented from moving in the C direction by a stopper, which will be described later. Further, when the playback button 3 is pressed down, that is, when the tape is running, an eject operation for extracting a force set, which will be described later, cannot be performed. As described above, the force setting tape recorder according to the present invention incorporates a safety device to prevent erroneous operation in each operation. Next, rewinding and fast forwarding operations will be explained.

To rewind while stopped, press the rewind fast forward lever 6.
Fast forwarding can be carried out by pushing the erroneous rewinding fast forwarding lever 6 in the direction C. In addition, if you want to take out the attached force set tape while it is stopped, push the stop button 5 in the direction A, and the pocket 1 will be ejected and opened by the leaf spring, allowing you to take out the force set without difficulty. . All of the operations for playback, recording, stopping, ejecting, fast forwarding, rewinding, reviewing, or cueing described above are provided on one side of the power set tape recorder, so all of the various operations described above can be performed with one hand. It has become easier to perform. Next, the operation of the mechanism of the force set tape recorder will be explained in detail with reference to FIGS. 3 to 5 showing an embodiment of the present invention. Reference numeral 10 denotes a board, and the board 10 has a tape supply reel drive shaft. 11 and a tape take-up reel drive shaft 12 are rotatably equipped, and a capstan 15 fixed to a flywheel 14 is rotatably attached to a bearing 13 located at the center of the substrate 10.

The recording/reproducing magnetic head 16 is fixed to a mounting plate 17, and the mounting plate 17 is mounted to a first sliding plate 18 so that its position can be adjusted. Slots 19, 20, 21 extending in the width direction are formed in the first sliding plate 18, and the slots 19, 20, 2
The pins 22, 23, 24 implanted on the substrate 10 are inserted into the slot 1, and the first sliding plate 18 slides over the substrate 10 into the slot 1.
It is designed to be able to slide within the range of lengths 9, 20, and 21. Hereinafter, this sliding direction will be referred to as the A direction. A pin 25 is installed on the first sliding plate 18, and the pin 25
The lever 2 has a pinch roller 27 rotatably attached to the lever 2.
6 is rotatably inserted. A torsion spring 28 having one end hooked to the lever 26 and the other end hooked to the first sliding plate 18 was attached to the pin 25, and the pin 29 was implanted by the torsion spring 28. Lever 26
is biased so that rotational force acts counterclockwise, but under normal conditions, this rotation is regulated by the shaft of the pinch roller 27 and the slot 30 formed on the first sliding plate 18. has been done. Furthermore, a slit-like cut 31 is formed below the first sliding plate 18, and a pin 32 implanted in a stop button 5, which will be described later, is inserted into the cut 31. A pin 33 is fixed to the back side of the plate 18, and a lever 34, which will be described later, is engaged with the pin 33.

The first sliding plate 18 is always moved in the D direction (opposite to the A direction) by a torsion spring 37 inserted into a force setting guide pin 35 installed above the base plate 10.
is energized by A second sliding plate 38 having an erasing magnetic head 39 is provided below the upper surface of the first sliding plate 18, and the second sliding plate 38 also has elongated holes 40, 41 extending in the width direction.
is formed, and is slidable in the A direction similarly to the first sliding plate 18 by being guided by pins 24 and 42 implanted on the substrate 10.

A hanging piece 43 is formed on the upper side of the second sliding plate 38 and is engaged with a rotating piece 44, which will be described later, and a hanging piece 45 is formed on the lower side, which is engaged with a notch 47 of a fin detection lever 46, which will be described later. ing. Furthermore, a fin detection lever 46 equipped with a protruding piece 48 for fin detection is rotatably provided below the guide pin 42 of the second sliding plate 38, and the protruding piece 48 comes into contact with the fin of the force setting tape. It's becoming like that.

The pin 42 also has a torsion spring 49 which has one end engaged with the fin detection lever 46 and the other end engaged with the board 10.
is provided, and the fin detection lever 46 is biased to rotate counterclockwise by the elasticity of the torsion spring 49. As shown in FIGS. 4 and 6, the substrate 10
A rewind fast-forward lever 6 is rotatably mounted coaxially with a capstan bearing 13 formed in , a notch 50 is formed at the end of the lever 6, and within the notch 150,
Rewinding gear 51 consisting of two upper and lower gears 51a and 51b
is installed.

51c is the shaft of the gear 51, and 51d is its bearing.

The lower gear 51b of the rewinding gear 51 is located in the flywheel 14, and is constantly meshed with the gear 57 fixed to the flywheel 14. First, the rewind gear 51 is configured to be able to be displaced in accordance with the rotation of the rewind fast forward lever 6 by a leaf spring 53 fixed to the side end of the base plate 10 by a screw 52. , its rotation range is restricted by a slit 54 formed in the substrate 10. A motor 55 is fixed in place at the lower end of the substrate 10 by means such as screws, and power is transmitted from the motor 55 to the flywheel 14 by a belt 56.

The upper gear 51a of the rewinding gear 51, which is displaced by the rewinding and fast-forwarding lever 6, is moved by the gear 60 inserted into the winding reel drive shaft 12 or An intermediate gear 59 provided on the substrate 10 and constantly meshing with the gear 58 of the supply reel drive shaft 11
It's starting to fit together. Further, as shown in FIGS. 5 and 7, on the board 10 is a shaft that extends horizontally across the rewind fast-forward lever 6 and is supported by bearings 65, 65 at the upper and lower ends. The rotating piece 44, the coil spring 62, the clutch movable part 63, and the clutch fixing part 64 are arranged in this order on the shaft 61. The coil spring 62 and the clutch movable part 63 are slidably fitted on the shaft 61.

Note that the bearings 65, 65 have U-shaped protrusions 66, 66 formed at both ends of the substrate 10, and after the bearings 65, 65 are positioned within the protrusions 66, 66, the protrusions 66, 66 are
It is fixed by tightening the tip of the Rotating piece 4
4 has a protrusion 67 on the lower side, which is engaged with the hanging piece 43 of the second sliding plate 38 described above, and a protrusion 68 provided above the rotary piece 44 is connected to the rewind/fast-forward lever 6. The levers 6 face each other and come into contact with the lever 6. Further, the lower half of the clutch movable portion 63 is located within a rectangular groove 69 formed in the base plate 10, and is urged toward the clutch fixed portion 64 by the coil spring 62. A concave portion 70 and a convex portion 71 are formed on opposing surfaces of the clutch movable portion 63 and the clutch fixed portion 64, respectively, so that the opposing concave and convex portions can be engaged. Furthermore, a protrusion 72 is provided on the outer periphery of the fixed side of the clutch.
The protrusion 72 is fitted into a square hole 73 formed at the tip of the recording button 4, which is slidable in the direction A on the surface of a support 74 formed on the substrate 10. Further, a dogleg-shaped lever 34 is rotatably attached to the lower side of the guide pin 22 of the first sliding plate 18, and the lever 34 is fixed to the back surface of the first sliding plate 18. The pin 33, the protrusion 75 of the rewind/fast-forward lever 6, and the groove 76 of the clutch movable part 63 are engaged with each other in association with each other. Further, as shown in FIG. 3, L-shaped pieces 77 and 78 are fixed to the underground corner portions of the sides of the board 10.
The pocket 1 is pivotally connected to pins 79 and 80 so as to be openable and closable.

An eject lever 81 is attached to a pin 82 at the tip of the stop button 5.
The pins 82 are rotatably connected by the pins 82, and the pins 82 are fitted into slots 83 formed in the substrate 10. Slot holes 84 and 85 are formed at the tip and lower end of the ejector lever 81, and pins 86 and 87 implanted in the base plate 10 are inserted into the slots 84 and 85 to slide in the A direction. It is configured to obtain. Furthermore, a hanging piece 88 having a slope is provided at the lower end of the lift lever 81, and the slope of the hanging piece 88 is engaged with a pin (not shown) installed in the pocket. An L-shaped slot 91 of the stop button 5, which is rotatably connected to the stop button 5, is inserted into a pin 90 implanted in the base plate 10, and the stop button 5 is regulated by the L-shaped slot 91. However, it can slide in the A direction in conjunction with the eject lever 81 and can also rotate about the pin 82 as a fulcrum. Furthermore, the stop button 5 has a first
A pin 32 that engages with a slit-like notch 31 formed in the sliding plate 18 is provided, and is always pulled diagonally downward by a coil spring 92, thereby causing the stop button 5 to move in the C direction and the D direction. It is biased in the direction of synthesis. Next, the operation of the cassette table recorder of the present invention constructed as described above will be explained. After inserting the force setting tape into the pocket 1 opened by pressing the stop button 5 in the direction A, the tape is inserted into the pocket 1. By pressing the force setting tape against the surface of the substrate 10, the force setting tape is installed in a predetermined position by the action of the guide pins 35, 36 and the leaf spring 93.

First, let's talk about the case where playback is performed. Press playback button 3 to A.
By pushing in the direction, the first sliding plate 18 slides in the A direction, and as a result, the stop button 5 is urged counterclockwise by the coil spring 92 with the pin 82 as a fulcrum. A pin 32 installed on the stop button 5 enters a slit-like cut 31 provided on the first sliding plate 18, and the first sliding plate 18 is locked. On the other hand, as the first sliding plate 18 moves in the A direction, the recording/reproducing magnetic head 16 fixed to the sliding plate 18 enters the force set through an opening formed on the side surface of the force set and comes into contact with the tape. do. Also, the first sliding plate 1
A pinch roller 27 rotatably attached to the first sliding plate 18 is driven by the first sliding plate 18, and is elastically pressed against the capstan 15 with a constant force by the action of the torsion spring 28, thereby causing the tape to run accurately. . At this time, the protrusion 94 provided on the lever 26 acts to prevent troubles such as the tape being wound around the pinch roller 27 and being damaged. Next, when performing a rewind operation, that is, a review operation in the above-described playback state, by pushing the rewind fast-forward lever 6 in the direction B, the rewind gear 51 located in the notch 50 of the lever 6 is moved. Displaced clockwise, the gear 51a on the ground side separates from the gear 60 attached to the tape take-up reel drive shaft 12, and the drive of the take-up reel drive shaft 12 is interrupted, and the upper gear of the rewind gear 51 51a is meshed with intermediate gear 59.

Since the intermediate gear 59 meshes with the gear 58 attached to the tape supply reel drive shaft 11, the flywheel 1
4 is transmitted to the tape supply reel drive shaft 11, and the tape supply reel drive shaft 11 is rotated counterclockwise to rewind the tape. At this time, the rotating direction of the capstan 15 and the running direction of the tape are reversed, so it is necessary to separate the pinch roller 27 from the capstan 15. However, in the present invention, when the above-mentioned rewind fast forward lever 6 is pushed in the direction B, the protrusion 75 of the lever 6 acts on the pin 29 of the lever 26 supporting the pinch roller 27, and the lever 26 is pinned. The pinch roller 27 is rotated clockwise about the fulcrum 25, and the pinch roller 27 is separated from the capstan 15. Further, the rewinding gear 51 described above is rotationally displaced about the capstan shaft, and the gear 57 of the flywheel 14 is provided concentrically with the capstan shaft, so that the meshing precision between the two gears 51b and 57 is always maintained at a high level. It is also useful for facilitating sauce production and assembly. Next, the so-called "Kyuuichi" operation of fast forwarding during playback is as follows.
This is accomplished by operating the rewind/fast forward lever 6 in the C direction in the playback state.

That is, when the lever 6 is pushed in the C direction, the shaft 51c of the rewind gear 51 is regulated by the slit 54, and the gear 60 of the take-up reel drive shaft 12 and the upper gear 51a maintain the meshed state. Only lever 6 is rotated counterclockwise. This rotation operates a switch (not shown) to supply a large current to the circuit of the motor 55, thereby speeding up the rotation of the motor 55, increasing the speed of the gear 60, and winding the tape in the forward direction at high speed. It can be taken and put into fast forward mode. Rewinding or fast forwarding in normal conditions, not during playback, is performed as follows. That is, when the rewind/fast forward lever 6 is pushed in the direction B while the play button 3 and the record button 4 are inactive, the gear 60 on the take-up reel side
The rewinding gear 51, which was engaged with the lever 6, is driven by the clockwise rotation of the lever 6, and at the same time it engages with the intermediate gear 59, a switch (not shown) is turned on, and the motor 55 is rotationally driven to rotate the belt 56. The flywheel 14 is rotated by
A gear 57 fixed concentrically with the flywheel 14 passes through a rewind gear 51 and an intermediate gear 59 to the tape supply side gear 5.
8 is rotated counterclockwise to rewind the tape. Further, when it is desired to perform fast forwarding in the above-mentioned normal state, the rewinding fast forwarding lever 6 is operated in the C direction.

When the lever 6 is pushed in the C direction, the upper gear 51a of the rewind gear 51 is kept in mesh with the gear 60 on the winding reel side, as in the case of fast forwarding during playback described above. At the same time as only the lever 6 is displaced counterclockwise, a switch (not shown) is turned on, a large current is supplied to the motor 55, the motor 55 rotates at high speed, and the flywheel 14 is rotated at high speed via the belt 56. A gear 57 fixed to the flywheel 14 and a rewinding gear 5
1, the gear 60 on the take-up reel side is transmitted at high speed,
The take-up reel drive shaft 12 is rotated and the tape is fed forward at high speed. Next, the recording operation will be explained.

First, when a recordable tape, that is, a tape with fins attached to the force set, is attached to the pocket 1, the fin detection lever 46 is pushed by the fins of the force set and rotated clockwise about the shaft 42, and the second slide The hanging piece 45 of the moving plate 38 and the notch 47 of the fin detection lever 46 are disengaged, and the second
The sliding plate 38 becomes slidable. In this state, when the play button 3 and the record button 4 are pushed in the direction A, the play button 3 is locked in the same way as in the case of the playback operation described above, but when the record button 4 is pushed in the direction A, the screen shown in FIG. As shown, the protruding part 72 of the clutch fixing part 64, which is fixed to the shaft 61 through the square hole 73 at the tip of the recording button 4, is rotated in the A direction together with the shaft 61, and is rotated by the elasticity of the coil spring 62. Then, the convex portion 71 of the clutch fixing portion 64 and the concave portion of the clutch movable portion 63 are engaged, and the clutch movable portion 63 is slid toward the clutch fixing portion 64. At this time, the clutch movable part 63
Since the clutch fixing portion 64 is guided and regulated by the groove 69, the clutch fixing portion 64 remains locked even in the above-mentioned rotated state, thereby maintaining the state in which the recording button 5 is pushed in the A direction. At the same time, the protrusion 67 of the rotary piece 44 fixed to the shaft 61 rotates in the same direction as the clutch fixing part 64 rotates, and the second sliding plate 38 also slides in the A direction by the protrusion 67. The erasing magnetic head 39 fixed on the second sliding plate 38 enters the tape through the opening on the side of the force set, contacts the tape, and sequentially erases previous recordings. Next, when a force set tape with the force set fin removed, that is, a force set tape that does not want to erase the existing recording, is attached to pocket 1, the protruding piece 48 of the fin detection lever 46 will detect the force set fin. Since it enters the force set through the cutout opening, the fin detection lever 46 is not rotated, and the notch 47 of the fin detection lever 46 and the second sliding plate 38 remain engaged. Therefore, the second sliding plate 38 is prevented from sliding in the A direction, and therefore the recording button 5 cannot be pushed down in the A direction, thereby preventing unexpected recording.

In addition, when the rewind fast-forward lever 6 is pressed in the direction B to perform so-called rewinding in the recording state, when the rewind fast-forward lever 6 is pushed in the B direction and the lever 6 is rotated clockwise, the lever The dogleg-shaped lever 34 is rotated clockwise about the pin 22 by the protrusion 75 on the lever 6 , and the movable clutch 63 engaged with the tip 100 of the lever 34 is moved by the coil spring 62 . The clutch fixing portion 64 is slid on the shaft 61 in the C direction against the elastic force of the clutch fixing portion 64.
As a result, the recording button 4 is unlocked and returned to its original position by the elasticity of the torsion spring 101.

In the recording state, the rewind/fast-forward lever 6 cannot be pushed in the C direction due to the protrusion 68 of the rotary piece 44. Furthermore, if you want to cancel the recording state,
As in the case of stopping playback, when the stop button 5 is pushed in the A direction, the playback button 3 is returned to its original position as described above.

At this time, the pin 33 planted on the back surface of the first sliding plate 18
As the pin 33 moves in the D direction, the pin 33 presses the upper edge 102 of the lever 34 and rotates the lever 34 clockwise, thereby causing the engagement between the clutch fixed part 64 and the clutch movable part 63 as described above. 5 is released and the recording button 4 is returned to its original state. Finally, speaking of the eject operation, the eject operation is performed by pressing down the stop button 5 in the direction A in the stopped state. That is, when the stop button 5 is pushed down in the A direction in the stopped state, the eject lever 81 connected to the four stop buttons 5 by the pin 82 is slid in the A direction. As a result, a pin (not shown) fixed to the side surface of the pocket 1 is pushed up by the inclined part of the hanging piece 88 formed on the escape lever 81, and the lock of the pocket 1 is released, and the leaf spring 93 is released. Due to the elasticity, the pocket 1 is pivoted outward and the force set can be attached and detached into the pocket 1. As described in detail above, the fast rewind device in the force set tape recorder according to the present invention is configured so that the fast rewind lever 6 can be rotated about the shaft of the capstan 15, and the motor 55 is connected to the shaft coaxially with the capstan 15. The rotational force transmitted to the flywheel 14 located on the lower surface side of the substrate 10 is
The transmission is transmitted to a gear 57 fixed to the flywheel 14, and a lower gear 51b that meshes with the gear 57 and a take-up reel side gear 60 or A rewinding gear 51 consisting of an upper gear 51a that selectively meshes with an intermediate gear 59 that is transmitted to the supply reel side gear 58 is disposed so as to be displaceable, and the rewinding gear 51 is operated by the operation of the rewinding fast-forwarding lever 6. As a result, the gear 51b on the lower side engages with the gear 57 of the flywheel 14 and is rotated to rotate the take-up reel drive shaft 12 or the supply reel drive shaft 11.
Since the rotational force of the motor 55 transmitted to the lower surface side of the substrate 10 can be guided to the upper surface side of the substrate 10 in a very rational manner,
The number of components disposed on the bottom surface of the substrate 10 is significantly reduced, and most of the components can be concentrated on the substrate 10.

This makes it possible to assemble from one direction, making it easy to adopt an automatic assembly method, which is extremely advantageous in reducing product costs. In addition, by operating the rewind/fast-forward lever, tape rewind, review, tape fast-forward, queue, etc. can be easily and accurately performed, and there is no disturbance in the meshing accuracy of gears due to these switching operations. Furthermore, it contributes to the miniaturization of parts, and functions equivalent to those of a large-sized tape recorder can be incorporated into a small-sized tape recorder.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which FIGS. 1 and 2 are a plan view and a side view schematically showing the exterior of a force-set tape recorder, and FIG. 3 is a diagram showing the internal structure of the tape drive section. 4 is a partially omitted vertical sectional view showing the state of the capstan drive section, FIG. 5 is an enlarged plan view of the recording operation section, and FIG. 6 is an exploded perspective view of the rewinding mechanism section. FIG. 7 is an exploded perspective view of the recording operation. 6 is a rewind fast-forward lever, 10 is a board, 11 is a tape supply reel drive shaft, 12 is a tape take-up reel drive shaft, 1
3 is a capstan bearing, 14 is a flywheel, 15 is a capstan, 51 is a rewinding gear, 55 is a motor, 57
is a gear fixed to the flywheel, 58 is a gear on the supply reel side, 59 is an intermediate gear, and 60 is a gear on the take-up reel side.

Claims (1)

[Claims] 1. The fast rewind lever is rotatable around the axis of the capstan, and the rotational force transmitted from the motor to the flywheel, which is located on the bottom surface of the board coaxial with the capstan, is transferred to the flywheel, which is fixed to the flywheel. At the same time, at the tip of the rewind fast-forwarding lever, a lower gear that meshes with the gear and an intermediate gear that transmits transmission to a gear on the take-up reel side or a gear on the supply reel side on the upper surface side of the board are selected. A rewinding gear consisting of an upper gear that meshes with the flywheel is disposed so as to be displaceable, and the lower gear meshes with the gear of the flywheel to rotationally displace the rewinding gear by operating the rewinding fast-forward lever. 1. A rewinding and fast-forwarding device for a cassette tape recorder, characterized in that a take-up reel drive shaft or a supply reel drive shaft can be selectively driven.