JPH03214453A - tape player tape drive - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a tape drive device for a tape player, and more particularly to a drive force for transmitting the drive force to a supply reel stand and a take-up reel stand of a tape player. This relates to a transmission device.

[Prior Art] The configuration of a tape drive device of a conventional tape player will be described with reference to FIG.

A gear 2 and a gear 3 are rotatably supported by the chassis 1, and the gears 2 and 3 are appropriately spaced apart from each other. A reel stand 4 is coaxially fixed to the gear 2. A reel stand 5 is coaxially fixed to the gear 3.

Further, the chassis 1 includes a rotation center of a gear 2 and a gear 3.
Gears 6 are rotatably supported around axes that are approximately equidistant from each rotation center. A gear 7 meshes with the gear 6. One end of a swing lever 9 is rotatably connected to the rotating shaft 8 of the gear 7 via a friction plate 10, and the other end of the lever 9 is rotatably supported by the rotating shaft 15 of the gear 6. .

The friction plate 10 engages the gear 7 and the lever 9 when the gear 7 rotates.
This creates frictional resistance between the two. Gear 7 is lever 9
When the lever rotates in the A1 direction, it can mesh with the gear 2, and the lever 9
can mesh with the gear 3 when rotated in the 81 direction.

The gear 6 includes a gear 1 rotatably supported by the chassis 1.
6 is engaged. A pin 7 is coaxially fixed to the gear 16. A rotary head drum 18 and a cap stan motor 19 are disposed on the chassis 1. A pulley 22 is attached to a drive shaft 20 of the cap stan motor 19. A drive belt 25 is stretched between the pulley 7 and the pulley 22.

Next, the operation of the tape drive device of a conventional tape player having this configuration will be explained. It is assumed that gear 7 is located between gear 2 and gear 3 as shown in FIG.

In the case of playback, recording, and normal fast forwarding, the capstan motor 19 rotates in the direction of the solid arrow (direction A), thereby causing each gear, lever, and pulley to start operating in the direction of the solid arrow. Due to the action of the friction plate 10, the gear 7 rotates in the solid line arrow A2 direction about the rotating shaft 8, but since a load is applied during this rotation, the gear 6 rotates in the A3 direction about the rotating shaft 15. The cap stan motor 19 rotates in the B1 direction, meshes with the gear 3, rotates at that position, and transmits the driving force from the cap stan motor 19 to the reel stand 5.

Therefore, in the case of playback, recording, and normal fast forwarding, the reel stand 5 serves as a driving reel stand to wind the tape 23 (FIG. 5).

In the case of reverse fast forwarding and reverse reverse review, the capstan motor 19 rotates in the direction of the dashed arrow B, and each gear, lever, and pulley begins to operate in the direction of the dashed arrow. The gear 7 rotates in the solid line arrow B2 direction (clockwise) around the rotating shaft 8 by the friction plate 10, but since a load is applied during this rotation, the gear 6 rotates around the rotating shaft 15 in the B3 direction.
It revolves in the A1 direction in conjunction with the rotation in the direction A1, meshes with the gear 2, rotates at that position, and transmits the driving force from the cap stan motor 19 to the reel stand 4. The gear 7 revolves in the opposite direction to that for playback, recording, and fast forwarding, and the reel stand 4 serves as a driving reel stand to wind up the tape 25 (FIG. 5).

[Problems to be Solved by the Invention] In a tape drive device for a tape recorder having the rotary head drum 18 as described above, the rotation of the capstan motor 19 is reversed to reverse the running direction of the tape 25, and the drive reel is rotated. When switching the direction of the drive force of the stand to the opposite direction, loss time occurs from the time when the switching signal is input to the capstan motor 19 until the reel stand 4 or 5 rotates as a driving reel stand due to the following factors. .

That is, (1) the cap stan motor 19 must be temporarily stopped in order for the rotation of the cap stan motor 19 to be reversed, and (1) each transmission system that transmits the rotation of the cap stan motor 19 requires transmission time. , further (
3) It takes time for the gear 7 to finish moving.

Among these factors, (3) has been a problem because it causes loss time especially in the following cases.

That is, when switching forward playback or recording to reverse review, the cap stan 20 and the pinch roller 30 provided on the cap stan motor 19 are pressed against each other via the tape 25, as shown in FIG. There is. The tape 25 is pulled out from the reel stand 5 at the same time as the capstan motor 19 begins to reverse in the direction of the dashed arrow. If the reel stand 4 to be driven at this time does not rotate, the pulled out tape 23 will not be wound up, so that the tape 23 will slacken between the reel stand 4 and the pinch roller 30. in this case,
The aforementioned factor (1) is unavoidable. The problem is the time from when the capstan motor 19 is reversed until the reel stand 4 starts rotating, that is, the factors described in (3) above. However, since factor (2) is caused by the number of parts in the transmission system, it is ultimately necessary to reduce the loss time of factor (3).

If the slack in the tape 23 increases, the tape running will naturally become unstable, and if the slack in the tape 23 occurs at the rotating head drum 18, the recorded sound cannot be reproduced because the signal recorded on the tape 23 cannot be reliably read. There is,
In the worst case, the tape 23 may come off the reading section of the rotary head drum 18.

[Means for Solving the Problems] An object of the present invention is to provide a tape player for use in a reel tape device having a rotating head drum, which can prevent tape slack from occurring and reduce loss time when reversing the running direction of the tape. The purpose of the present invention is to provide a driving device.

According to the present invention, the object is to provide a first gear rotatably supported on a chassis, a first reel stand coaxially fixed to the first gear, and a first gear spaced apart from the first gear. from a second gear rotatably supported by the chassis, a second reel stand coaxially fixed to the second gear, and a rotation center of the first gear and a rotation center of the second gear, respectively. a third gear supported by the chassis so as to be rotatable about an axis approximately equidistant from the other, and a third gear meshing with the third gear and freely revolving around the aforementioned axis; a planetary gear that can mesh with the third gear; a swinging lever that has one end rotatably supported by the planetary gear with frictional resistance and the other end rotatably supported by the chassis around the rotation center of the third gear;
This is achieved by a tape drive device for a tape player characterized in that it includes a swinging means connected to the swinging lever to forcibly swing the swinging lever.

[Operation] In the device of the present invention, the swing lever moves in the rotational direction of the third gear as the third gear rotates, and the third gear meshes with one of the first gear and the second gear. Prior to this, the swing lever can be forcibly moved in the direction of rotation of the third gear by the swing means. As a result, the third gear and the first
It is possible to reduce the loss time of meshing with one of the second gear and the second gear, and in addition, it is possible to prevent the occurrence of slack in the tape, and it is possible to prevent poor playback and tape separation.

[Example] Hereinafter, an example of the present invention will be described using FIG. 1. Note that the same reference numerals are given to the same components as those in the apparatus shown in FIG.

A gear 2 and a gear 3 are each rotatably supported by the chassis 1, and the gear 2 and the gear 3 are appropriately spaced apart from each other. A reel stand 4 is coaxially fixed to the gear 2. A reel stand 5 is coaxially fixed to the gear 3.

Further, the chassis 1 includes a rotation center of a gear 2 and a gear 3.
Gears 6 are rotatably supported around axes that are approximately equidistant from each rotation center. A gear 7 as a planetary gear meshes with the gear 6. The rotating shaft 8 of the gear 7 has
One end 36 of a substantially L-shaped swing lever 35 is rotatably connected via a friction plate 10 . Central part 37 of lever 35
is rotatably connected to the rotating shaft 7. The other end 38 of the lever 35 extends substantially perpendicularly to the one end 36 of the lever 35. The other end 38 of the reher 35 has a bottom surface 38a.

Further, the other end 38 of the lever 35 has an inclined portion 38c adjacent to the tip side with respect to the bottom surface 38a, and has a recess 38b adjacent to the center portion 37 side with respect to the bottom surface 38a.

The friction plate 10 engages the gear 7 and the lever 3 when the gear 7 rotates.
5 and one end 36 of 5.

The gear 7 rotates when the lever 35 rotates in the A1 direction.
It can mesh with the gear 3 when the lever 35 rotates in the B1 direction.

The gear 6 includes a gear 1 rotatably supported by the chassis 1.
6 are engaged. A pulley 17 is coaxially fixed to the gear 16. The chassis 1 includes a rotating head drum 1
8 and a cap stan motor 19 are provided. A pulley 22 is attached to the drive shaft 20 of the cap stan motor 19.
A drive belt 25 is stretched between the pulley 17 and the pulley 22 to which the pulley 17 and the pulley 22 are attached.

Slide levers 40 are arranged extending parallel to a straight line connecting the rotation center of the reel stand 3 and the rotation center of the reel stand 4 so as to be parallel to the other end 38 of the reher 35. The lever 40 has two parts extending along the extension direction of the lever 40.
Two guide grooves 40a and 40b are provided in series in the direction in which the lever 40 extends. The chassis 1 has two guide pins 41a. 4lb is provided, and the guide groove 40a,
40b is pi:z41a. 4lb.

One end 42 of the lever 40 has a protrusion 43 that protrudes perpendicularly to the extending direction of the lever 4o.
A contact pin 44 is provided that can come into contact with the inclined portion 38c of the other end 38 of the swing lever 35.

The drive motor 5o used as a power source for the tape loading mechanism is used as a drive source for the reher 40. The drive gear 5I includes the worm wheel portion 51a and the gear 5.
The worm wheel portion 51a meshes with the worm gear portion 50a of the drive motor 50, and the gear 5lb meshes with the gear 52.

One end of a link 53 is fixed to the rotation center of the gear 52. One end of the link 54 is connected to the pin 5 at the other end of the link 53.
5 and are rotatably connected. The other end of the link 54 and the other end of the lever 40 are rotatably connected to each other via a pin 36.

The swinging means according to the device of the present invention is the other end 38 of the lever 35.
, a lever 4 [1, a hit pin 44, and a motor 5o.

Next, the operation of an embodiment of the apparatus of the present invention will be explained using FIGS. 1 to 3.

When the loading motor 50 applies driving force in the direction of the arrow (a direction) shown by the solid line, the gears 51 and 52
and the link 53 rotates in the direction of the arrow shown by the solid line,
Correspondingly, the lever 40 also moves in the direction of the arrow shown by the solid line (a1 direction). When a driving force is applied by the loading motor 50 in the opposite direction (direction b of the dashed-dotted arrow), the lever 40 moves in the b1 direction of the dashed-dotted arrow.

As shown in FIG. 1, when the lever 40 moves in the a1 direction and the hit pin 44 is located at a position away from the other end 38 of the lever 35, this device operates in reverse fast forwarding and forward fast forwarding. , is in a stopped state.

In the case of reverse rotation and forward rotation fast forwarding, the gear 7 is moved by the rotation of the capstan motor 19, similar to the device shown in FIG. In case of a stop, the motor stops.

In the case of reverse review, as shown in FIG. 2, before the gear 7 moves due to the rotation of the cap stan motor 19, the lever 40 moves in the a1 direction or the b1 direction due to the rotation of the motor 50 and hits. The pin 44 comes into contact with the bottom surface portion 38a of the lever 35. As a result, the lever 40 rotates in the C direction, and the gear 7 meshes with the gear 2. As a result, the reel stand 4 winds up the tape 23.

The relative positional relationship between the pin 44 of the lever 40 and the bottom surface 38a of the lever 37 is such that when the lever 35 moves in the a1 direction or the b1 direction and the pin 44 abuts on the bottom surface 38a of the lever 35, the gear 7 moves to the gear 2. It may be arranged to stop just before the meshing occurs. In this case, the gear 7 is then moved by the rotation of the cap stan motor 19 to move the gear 7 to the gear 2.
mesh. As a result, the abutting pin 44 of the lever 40
Alternatively, overstroke of the gear 7 due to a dimensional error of the bottom surface 3Fla of the lever 35 can be prevented.

In the case of playback or recording, as shown in FIG. 3, before the gear 7 is moved by the rotation of the capstan motor 19, the lever 40 is moved in the a1 direction by the rotation of the motor 50 and moved into the recess of the lever 35. 38b is received by the contact pin 44, the lever 35 rotates in the D direction, and the gear 7 meshes with the gear 3. As a result, the reel stand 5 winds up the tape 23.

[Effects of the Invention] In the device of the present invention, the swing lever moves in the rotation direction of the third gear as the third gear rotates, and the third gear moves toward one of the first gear and the second gear. The swing lever can be forcibly moved in the rotational direction of the third gear by the swing means prior to meshing with the third gear. As a result, the third gear and the first
It is possible to reduce the loss time of meshing with one of the second gear and the second gear, and in addition, it is possible to prevent the occurrence of slack in the tape, and it is possible to prevent poor playback and tape separation.

[BRIEF DESCRIPTION OF THE DRAWINGS] FIG. 1 is a block diagram showing the outline of the configuration of an embodiment of the present invention, FIGS. 2 and 3 are explanatory diagrams each explaining the operation of the embodiment of the present invention, and FIG. The figure shows a configuration diagram explaining a conventional example, and a fifth
The figure is an explanatory diagram illustrating the operation of the reel tape device. 1...Chassis, 2, 3, 6, 7
．． 16... Gear, 4.5... Reel stand, 17. 22... Pulley,... Cap stan motor, 23... Tape,... Swing lever, 40... Slide lever 19... 35...・ Seven S! Person (504) Sharp Corporation

Claims (1)

[Claims] a first gear rotatably supported by the chassis; a first reel stand coaxially fixed to the first gear; and a first reel stand spaced apart from the first gear and rotatably supported by the chassis. a second gear coaxially fixed to the second gear, and a second reel stand approximately equidistant from each of the rotation center of the first gear and the rotation center of the second gear. a third gear supported by the chassis so as to be rotatable around an axis; a third gear meshing with the third gear and rotatable around the axis; a planetary gear that can mesh with the planetary gear; and a rocking lever that has one end rotatably supported by the planetary gear with frictional resistance and the other end rotatably supported by the chassis around the rotation center of the third gear. A drive force transmission device for a tape player, comprising: a swing means connected to the swing lever for forcibly swinging the swing lever.