JPS62164256A - Reel drive mechanism - Google Patents

Abstract

PURPOSE:To attaint the 3-dimensional use of a space and to obtain a compact and intensive drive mechanism by providing a reel drive gear under a supply reel and coaxially to this reel. CONSTITUTION:A reel drive gear 6 is set under a supply reel 1 and coaxially to this reel 1 and connected to a reversible reel motor via the prescribed belt and pulley to always engage a center gear 5. In a play mode a take-up gear 7 engages a take-up reel 2 and the reel 2 is revolved in a fixed direction via both gears 5 and 7. In such a constitution, a space is used 3-dimensionally with high efficiency to attain a compact and intensive drive mechanism.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a reel drive mechanism used in a digital audio tape recorder equipped with a rotary head. This invention relates to a reel drive mechanism that has achieved miniaturization.

[Technical Background of the Invention and Problems thereof] In recent years, with the development of digital audio technology, technology has been developed for converting analog audio signals into digital signals and recording them on tape. In this way, converting analog signals to digital signals requires an extremely wide proprietary frequency band, so the contact area per unit time is widened in the magnetic head for recording or reproducing signals on tape. There is a need. For this purpose,
Since it is essential to adopt a rotating head system instead of the conventional fixed head system, various types of tape recorders equipped with rotating heads have been proposed based on these conditions.

However, compared to conventional tape recorders that use fixed heads, this type of tape recorder requires additional space to rotate the head and space to load the tape, so the tape recorder body is Easy to increase in size.

This has become a major problem, as it goes against the strong demand for compactness, especially in tape recorders used in vehicles. Therefore, it is conceivable to downsize and consolidate the other mechanisms of the tape recorder to make the configuration more compact. In this case, the first idea would be to downsize and consolidate the reel drive mechanism, which occupies a large amount of space in the tape recorder, but the number of gears used in the reel drive mechanism can be reduced to the minimum necessary with current technology. Therefore, it was impossible to reduce the number of gears, and it was difficult to downsize the reel drive mechanism.

[Object of the Invention] The present invention was proposed in order to eliminate the drawbacks of the prior art as described above, and its purpose is to reduce the size and size of the reel drive mechanism in a digital audio tape recorder having a rotating head. It is an object of the present invention to provide a reel drive mechanism that enables consolidation and contributes to making tape recorders more compact.

[Summary of the Invention] The reel drive mechanism of the present invention is characterized in that a reel drive gear that rotates in conjunction with the reel motor is disposed below the Zaburi reel. By making good use of space, the mechanism can be made smaller and
This integration has made the tape recorder more compact.

[Embodiment of the Invention] An embodiment of the reel drive mechanism according to the present invention as described above will be specifically described with reference to the drawings.

*Configuration In FIGS. 1 and 2, 1 and 2 are a double reel and a take-up reel, each of which has gears 3 and 4. A center gear 5 is attached between each reel 1 and 2. At the bottom of supply reel 1 is the same reel 1.
A reel driving gear 6 is attached coaxially and independently from the reel. This reel driving gear 6 is connected to a reversible rolling motor via a belt and a pulley, and is always meshed with the center gear 5. Further, a pick-up gear 7 is provided between the take-up reel 2 and the center gear 5. This tick-up gear 7 is attached to one end of an arm 8 that rotates in conjunction with the tape loading mechanism, and rotates in the meshing direction only when the pinch roller is pressed against the capstan during play, and takes up the tape. The reel 2 and center gear 5 are connected.

On the other hand, one end of a fast forward rewind arm 9 is attached to the center gear 5 so as to have friction, and is constantly meshed with a fast forward rewind connecting gear 10 attached to the other end of the fast forward rewind arm 9. There is. This fast-forwarding and rewinding connection gear 10 is connected to each reel 1, 2 by rotation of the fast-forwarding and rewinding arm 9 according to the rotating direction of the center gear 5.
Rewinding gear 11 or fast forwarding gear 12 meshed with
This causes the supply reel 1 or the take-up reel 2 to rotate at high speed.

In the figure, reference numeral 22 denotes a fast-forwarding and rewinding gear 11. '12 is a reel brake that is pressed from the outside, and when switching from fast forward and rewind operation to play operation and when stopping, fast forward and rewind gear 1
This is to provide friction to the tape 1.12 to prevent the tape from loosening due to the switching operation. In the figure, reference numeral 24 indicates a gear 11 for fast forwarding and rewinding due to the urging force of a spring 25.
It is necessary to use a preload brake that is crimped from the inside at ゜12.
During loading, the force for pulling out the tape is relaxed to prevent the tape from becoming loose due to excessive pulling, and at the time of play, the fast forward/rewind connecting gear 10 is biased to the center position.

26 in the figure is an upper brake release plate for releasing the reel brake 22, and 27 in the figure is a lower brake release plate for releasing the preload brake 24, which are driven by drive plates 28 and 29, respectively. It has become.

Note that the drive plate 29 is connected to the above-mentioned pickup gear 7.
It also drives the.

*Operation The reel drive mechanism of the present invention having the above-mentioned configuration operates as follows.

■When loading a tape When loading a tape, the loading motor rotates as soon as the cassette is inserted and the loading block is pressed against the rotating head.
The pinch roller moves forward.

During tape loading, the reel motor does not rotate, but as the loading block moves forward, the drive gear 6 and the freely attached supply reel 1 rotate to draw out the tape. Furthermore, at this time, the tape pull-out force is alleviated by the loads of the band brake 20 and preload brake 24, so there is no risk of trouble occurring due to excessive tape pull-out.

At the time of play at 0111, the loading motor is further rotated from the tape loading completion state to press the pinch roller in the forward position against the capstan. At this time, the pick-up gear 7, which is interlocked with the tape loading mechanism via the drive plate 29, moves the take-up reel 2
and the center gear 5 to connect the two. At this time, since the reel drive gear 6 is rotated counterclockwise by the reel motor, the take-up reel 2 is rotated clockwise, which is the winding direction, via the center gear 5 and the pick-up gear 7, and the tape is run. It will be done.

On the other hand, the preload brake 24 is rotated to the center position, which is the release direction, by the movement of the drive plate 29 and the lower release plate 27, and is fixed at the same position.
The fast forward/rewind coupling gear 7 is also held in the central position.

■Fast forwarding and rewinding During fast forwarding and rewinding, the loading motor rotates in the opposite direction. At this time, although the pinch roller is kept in contact with the loading block rotating head, the pinch roller separates from the capstan, and the pick-up gear 7 separates from the center gear and the take-up reel. Further, regarding the brake mechanism, since the preload brake 24 is pressed instead of the reel brake 22 being released, a light load is applied to the tape, and the tape does not become slack due to switching.

When the loading motor performs a predetermined rotation, a fast forward/rewind switch is turned on, thereby rotating the reel motor to perform fast forwarding or rewinding.

That is, during fast forwarding, the reel driving gear 6 rotates clockwise and the center gear 5 meshing with it rotates counterclockwise, so that the fast forwarding and rewinding arm 9 is rotated in the same direction by the 7-reaction. However, the fast-forwarding and rewinding connection gear 10 meshes with the fast-forwarding gear 12, and the winding reel 2 rotates at high speed through the above connection to perform a fast-forwarding operation.

In addition, during rewinding, the reel drive gear 6 rotates counterclockwise and the center gear 5 rotates in the forward and backward direction, so that the fast forward rewinding connection gear 10 meshes with the rewinding gear 11, thereby completing the above connection. The supply reel 1 is rotated at high speed through the rewinding operation.

At 019191:49191~, the loading block is moved backward by rotating the loading motor in the reverse direction from the stopped state, and the pinch roller is separated from the capstan and moved backward. This turns on the unloading detection switch, turns on the cassette loading motor, and performs the ejecting operation.

As explained above, according to this embodiment, the supply reel 1
By providing the reel driving gear 6 under the reel, efficient three-dimensional space utilization is achieved, and the reel driving mechanism is made smaller and more integrated. Therefore, it is possible to greatly contribute to making the tape recorder more compact, and to provide a tape recorder that is suitable for use in vehicles and the like.

[Other Examples] Note that the present invention is not limited to the above-described embodiments, and the connection configuration from the reel motor to the reel drive gear can be selected as appropriate, and the load on the reel drive mechanism can be selected as appropriate. The configuration of the brake mechanism can also be changed freely.

[Effects of the Invention] As explained above, according to the present invention, in a digital audio tape recorder having a rotating head, a reel driving gear is provided below the supply reel, thereby making it possible to downsize and consolidate. Accordingly, it is possible to provide a reel drive mechanism that can realize a compact tape recorder.

[Brief explanation of drawings]

1 and 2 are a plan view and a front view, respectively, showing an embodiment of a reel drive mechanism according to the present invention. 1... Supply reel, 2... Take-up reel, 3...
... Supply reel gear, 4... Take-up reel gear, 5... Center gear, 6... Reel drive gear,
7... Tick-up gear, 9... Arm for fast forwarding and rewinding, 10... Connecting gear for fast forwarding and rewinding, 11...
Rewinding gear, 12... Fast forwarding gear, 22... Reel brake, 24... Preload brake.

Claims (1)

[Scope of Claims] A reel drive mechanism used in a digital audio tape recorder equipped with a rotating head, comprising: a. a take-up reel and a supply reel each having an integral gear; b. A reel driving gear that is disposed below the supply reel coaxially with and independently from the supply reel and rotates in conjunction with the reel motor. c. A center gear that is disposed between the take-up reel and the supply reel and constantly meshes with the reel drive gear. d. A take-up gear that engages the take-up reel and center gear during play. e. Rapid feed gear that constantly meshes with the take-up reel. f. Rewinding gear that constantly meshes with the supply reel. g. A fast-forward/rewind connecting gear that constantly meshes with the center gear, rotates according to the direction of rotation of the center gear, and meshes with the fast-forward gear or the rewind gear. A reel drive mechanism comprising each of the members a to g above.