JPS6141148Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a reel stand drive device for a tape recorder.

Generally, in order to drive the reel stands of a tape recorder, that is, the supply side reel stand and the take-up side reel stand, multiple drive pulleys are placed close to the outer periphery of a pair of drive wheels that have each of these reel stands coaxially mounted. The supply reel stand and the take-up reel stand are rotated in opposite directions for tape rewinding or fast forwarding by planar movement of the plurality of drive pulleys.

That is, in order to rotate each reel stand in the opposite direction by the rotation of the motor in one direction, an intermediate pulley is required to rotate in the opposite direction, which increases costs and causes problems such as noise generation, wow, and flutter. It was also a cause of performance deterioration.

The present invention has been proposed in view of these points, and will be explained below along with embodiments shown in the drawings.

FIG. 1 is a plan view of the device of the present invention in a state in which the operating means are not operated, and 1 shows a first reel which has a reel spindle 2 that engages with one reel hub of a cassette and is provided with a gear portion 3 on its inner periphery. The base driving wheel 4 is a second reel base driving wheel which has a reel spindle 5 that engages with the other reel hub of the cassette and is provided with a gear portion 6 on its outer periphery. They are rotatably arranged side by side on the shafts 8 and 9, and a portion of each is stacked vertically at a predetermined interval.

The first reel base drive wheel 1 serves as the tape supply side and is rotated during tape winding, and the second reel base drive wheel 4 serves as the tape winding side and is rotated during tape fast forwarding.

Reference numeral 10 denotes a drive gear that is constantly rotated clockwise by a belt 13 that is stretched around a pulley 12 of a motor 11. The drive gear 10 is a oscillator whose one end is rotatably attached to a support shaft 14 on the chassis 7. It is rotatably provided at the other end of the movable lever 15.

The swing lever 15 is urged to rotate clockwise by a spring ring 16, and a control pin 17 is provided on the lower surface thereof.

What is important here is that the drive gear 10 is connected to the inner gear part 3 of the first reel base drive wheel 1 or the outer gear part 6 of the second reel base drive wheel 4 by the rotation of the swing lever 15. They are arranged so as to selectively engage with each other.

In order to pivot said rocking lever 15, operating means 18 are provided which cooperate with its control pin 17. One of the operating means is a tape rewind operating lever 19, and the other is a tape fast forward operating lever 20. The operating levers 19 and 20 are arranged parallel to each other on the chassis 7, and are operated in the direction of arrow A in the drawing against a spring (not shown), and their operating positions are locked by a well-known locking mechanism. Ru.

The tape rewinding operating lever 19 has a first abutment plane surface 19a formed on its side surface that connects with the control pin 17, and a second abutment surface that connects with the control pin 17 through an inclined surface 19b during operation. A surface 19c is formed.

Further, the fast forward operating lever 20 is provided with an arm piece 20' extending in the direction of the rewinding operating lever 19, and the control pin 1 is attached to the side surface of the arm piece 20'.
An inclined surface 20a that joins with the control pin 17 is formed, and an abutment plane 20b that joins with the control pin 17 during operation is formed.

Therefore, when neither of the operating levers is operated, the control pin 17 of the swing lever 15 is in contact with the first abutting plane 19a of the rewinding operating lever 19 and the inclined surface 20a of the fast forwarding operating lever 20.
As a result, the drive gear 10 is connected to the gear portions 3 and 6 of each of the drive wheels 1 and 4 .
It is configured so that it is set in a position where it does not mesh with the

The device of the present invention is constructed as described above, and its operation will be explained below.

FIG. 1 shows a state in which none of the operating levers is operated, and the rotation of the motor 11 in the direction of the arrow causes the drive gear 10 to rotate in the direction of the arrow via the belt 13.

In such a state, if the rewind operation lever 19 is operated as shown in FIG. The control pin 17 connects to the second contact surface 19c through the inclined surface 19b. Therefore, the swing lever 15
The clockwise rotation causes the drive gear 10 to mesh with the gear part 3 provided on the inner periphery of the first reel base drive wheel 1 , and the first reel base drive wheel 1 rotates in the direction of the arrow and its The reel spindle 2 allows the tape to be rewound.

Next, from the state shown in FIG. 1, if the fast-forward operation lever 20 is operated as shown in FIG. 4, the control pin 1 is
7 is pushed to the right, the swing lever 15 is rotated counterclockwise by an angle (θ)' against the spring 16, and the control pin 17 is joined to the abutment plane 20b.

Therefore, by rotating the swinging lever 15 in the counterclockwise direction, the drive gear 10 meshes with the gear part 6 provided on the outer periphery of the second reel base drive wheel 4 , and the second reel base drive wheel 4 The reel spindle 5 rotates in the direction of the arrow, and the tape can be rapidly forwarded by its reel spindle 5.

If the fast-forward operating lever 20 is returned from the operating position from the tape fast-forwarding state shown in FIG. The lever 15 is rotated clockwise by the spring 16, and its control pin 17 is connected to the first contact surface 19a of the rewind operation lever 19, so that the drive gear 10 is connected to the gears of each of the drive wheels 1 and 4 . It returns to the neutral position spaced apart from parts 3 and 6.

In the above description, the rewind operation lever and the fast forward operation lever have been described as the operation means, but the operation lever may also be used as a reversal operation lever for reproducing tape in both directions in an auto-reverse type tape recorder.

Furthermore, by making the pitch circles of the gear parts of the first reel base drive wheel and the second reel base drive wheel the same, it is possible to make the tape winding time of the left and right reel spindles the same, and the pitch circle can be adjusted as necessary. may be changed.

As described above, the device of the present invention includes a first reel base drive wheel provided with a gear portion on the inner periphery, a second reel base drive wheel provided with a gear portion provided on the outer periphery, and a drive gear that always rotates in one direction. and the drive gear is moved from a neutral position where it does not mesh with the gear portion of each reel table drive wheel to a first position where it meshes with the gear portion of the first reel table drive wheel, or from that neutral position to a gear portion of the second reel table drive wheel. Since the reel spindle is configured with an operating means for selectively moving the reel spindle to the second position where it engages with the reel, the left and right reel spindles can be reliably and selectively rotated with a simple configuration. Since it is only necessary to arrange a single drive gear between the reel drive wheels, it is possible to suppress noise generation and prevent the deterioration of wow and flutter, making it suitable for use as a reel drive device for small tape recorders. It has high practical value.

[Brief explanation of drawings]

The figures show an embodiment of the device of the present invention, in which Fig. 1 is a plan view of the operating means when it is not operated, Fig. 2 is a partially sectional side view, and Figs. 3 and 4 are plan views in different operating states. It is. 1 ...First reel stand drive wheel, 3...Gear section, 4
...Second reel stand drive wheel, 6...Gear section, 10...
... Drive gear, 15 ... Swing lever, 16 ... Spring, 17 ... Control pin, 18 ... Operation means,
19... Operating lever for rewinding, 20... Operating lever for fast forwarding.

Claims (1)

[Scope of utility model registration request] A first reel base drive wheel having a gear portion on its inner periphery, a second reel base drive wheel having a gear portion on its outer periphery, a drive gear that always rotates in one direction, and a drive gear connected to each reel base. Select from a neutral position that does not mesh with the gear portion of the drive wheel to a first position that meshes with the gear portion of the first reel stand drive wheel, or from the neutral position to a second position that meshes with the gear portion of the second reel stand drive wheel. A reel stand drive device comprising an operating means for moving the reel stand.