JP2656042B2 - Recording and playback device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording / reproducing apparatus that can be used for a small digital audio tape recorder or the like.

2. Description of the Related Art In recent years, recording / reproducing apparatuses have tended to be miniaturized, and recently released digital audio tape recorders are no exception.

Hereinafter, an example of a conventional recording and reproducing apparatus will be described with reference to the drawings.

FIG. 3 is a top view of a digital audio tape recorder currently in practical use. In the figure, 1 is a tape guide drum, 2 is a supply reel stand, 3 is a take-up reel stand, 4 is a capstan, 5 is a pinch roller, 6 and 7 are tape loading guide rollers, 8 is a magnetic tape cassette, and 9 is magnetic. The tape, 10 is a chassis, and 11, 12 are guide grooves of a loading guide block for supporting the tape loading guide rollers 6, 7.

FIG. 4 is a side sectional view of a conventional take-up reel base used here. In the figure, 13 is a hub driving claw, 14 is a take-up reel base shaft, 15 is a bearing thereof, 16 is a reel base gear, which is fixed to the reel base shaft 14 and rotates together with the take-up reel base 3. Reference numeral 17 denotes an intermediate gear, which transmits a constant rotation torque to the take-up reel base 3 via a slip clutch and drives the take-up reel base 3 during recording and reproduction. When the tape is fast-forwarded, a larger rotational force than during recording and reproduction is transmitted to the reel base gear 16 via another path. That is, the rotating body constituting the conventional reel base is intended only to take in the rotational force directly related to the drive of the reel base.

Problems to be Solved by the Invention However, in the above configuration, the tape 9 in the tape cassette 8 is pulled out toward the tape guide drum 1 before use and wound around the tape guide drum 1 at a predetermined angle. For this reason, it is necessary to move the members related to the tape drive and travel guide from the inside of the tape cassette to a predetermined position. Therefore, a rotation transmission mechanism cannot be provided in a portion corresponding to substantially half of the chassis 10. For this reason, the available space becomes extremely small, and there is a problem that it becomes difficult to design the apparatus, especially when the apparatus is downsized.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and provides a recording / reproducing apparatus which can effectively use a narrow space and can easily downsize a device.

Means for Solving the Problems In order to solve the above problems, the present invention provides a supply reel table and a take-up reel table, the respective reel table axes of the supply reel table and the take-up reel table, and the respective reel tables. A recording / reproducing apparatus having a first rotating body and a second rotating body held rotatably independently of each reel base on a concentric axis of a shaft, wherein the first rotating body is a tape A middle gear for transmitting the torque transmitted from the first drive source during fast-forward rewinding, wherein the second rotating body converts the torque transmitted from the second drive source into an operation mode switch The recording / reproducing apparatus is a switching cam gear.

In the present invention, not only the reel base shaft can be shared by the above-described configuration, but also the space is slightly increased in thickness, but a large area is produced and the three-dimensional effective use can be achieved.

Embodiment Hereinafter, a recording and reproducing apparatus according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a top view showing a configuration of a rotation transmission mechanism of a recording / reproducing apparatus according to an embodiment of the present invention. In FIG. 1, reference numeral 4 denotes a shaft of the capstan motor 18, that is, a capstan; 19, a motor gear attached to the shaft of the capstan motor 18; 20, 21 a middle gear; and a slip gear (not shown). It is formed integrally. Reference numeral 22 also denotes a middle gear, which takes two positions: a non-operation position shown in the figure and an operation position moved in the direction of the arrow. Reference numeral 23 denotes a take-up reel gear, which rotates integrally with the reel base shaft 14 of the take-up reel base 3. Reference numeral 24 denotes a center gear, which is rotatably held on the concentric axis of the reel base shaft 14 of the take-up reel base 3 independently of the take-up reel base 3, and transmits rotation that is not directly related to the drive of the reel base. Do. 25 and 26 are integrally formed middle gars, 27 is an early winding gang,
It is supported on an arm about the center of the middle gear 25 and is always meshed with the middle gear 26. Reference numeral 28 denotes an arm, which is in contact with the intermediate gear 26 via a friction member (not shown), rotates in the direction of the arrow H or G according to the rotation direction of the intermediate gear 26, and Switch the transmission destination. Reference numeral 29 denotes a reel spindle of the supply reel table 2 and reference numeral 30 denotes a supply reel table gear, which rotates integrally with the spindle 29 of the supply reel table 2. 31
Is a mode switching cam gear, which rotates on a concentric axis of the reel base shaft 29 of the supply reel base 2,
Has no direct relation to the rotation of the lens and is independently rotatably held. Reference numerals 32 and 32 'denote mode switching cams formed on the mode switching cam gear 31, which drive levers and the like (not shown) necessary for mode switching. 33 is a mode switching motor,
34 is a worm mounted on the axis of the mode switching motor 33,
Numeral 35 is a central gear, 36 and 37 are centrally formed gears, 38 and 39 are also centrally formed gears, 40 is a mode switching cam gear, 41 is a groove cam formed on the mode switching cam gear 40. Yes, the levers (not shown) required for mode switching are driven.

FIG. 2 is a side sectional view showing details of a take-up reel base.

With respect to the recording / reproducing apparatus configured as described above,
The operation will be described with reference to the drawings. The capstan motor shaft 4 also serves as a capstan, and can switch rotation in both A and B directions. During recording and playback, it rotates in the A direction,
The rotation in the C direction is transmitted to the take-up reel table gear 23 via 20, 21, and 22. The magnitude of the transmitted torque is
The required value is set through a slip clutch (not shown) interposed between 0 and 21. In this way, the tape sent by the capstan 4 is taken up on the take-up reel base 3. In the tape fast-forward mode, the middle gear 22 is in the non-operation position and the capstan motor 18
Is transmitted to the take-up reel table gear 23 at a high speed via the middle rollers 20, 24, 25, 26 and the early take-up gear 27, and the take-up reel table 3 is moved in the direction of arrow C at high speed. Rotate. At the time of rewinding, it is only necessary to switch the rotation direction of the capstan motor 18 in the direction of arrow B.
The direction is automatically switched to the direction, the early winding gear 27 meshes with the supply reel table gear 30, and the supply reel table 2 is rotated at high speed in the direction of arrow E.

On the other hand, the switching of each operation mode such as reproduction, stop, fast forward, rewind, tape loading, unloading, etc., takes its power from the mode switching motor 33. That is, at the time of mode switching, two of the mode switching cam gears 40 and 31 are driven via the intermediate gears 35, 36, 37 and 39 according to the rotation direction and the rotation amount of the mode switching motor 33, and the groove cam 41 and the cam 32 are driven. ,
A mode switching lever or the like (not shown) engaged with 32 'or the like is driven to perform mode switching.

As described above, according to the present embodiment, by providing a rotating body that is rotatably held on the reel base axis of the supply reel table or the take-up reel table and that is not directly involved in the rotation of the reel table, The space that had to be avoided can be effectively used, and the rotation shaft can be shared, so that the size of the device can be reduced.

In this embodiment, the reel spindle rotates together with the reel spindle. However, the reel spindle may be fixed on the chassis.

Further, in the present embodiment, one of the rotating members which is not directly involved in the rotation of the reel base, and the middle gear 24 which is a component of the tape fast-forward / rewind means is mounted on the reel base of the take-up reel base 3. This is another rotating body which is placed concentrically with the shaft 14 and which is not directly involved in the rotation of the reel stand. The mode switching cam gear 31 relating to the switching of the operation mode is concentric with the reel stand axis 29 of the supply reel stand 2. Although placed, it is free to change the shaft into which these rotating bodies are inserted according to the design of the mechanism, and there is no restriction.

Effect of the Invention As described above, according to the present invention, it is possible to provide a recording / reproducing apparatus that can effectively use space and share a rotating shaft, and thus can easily design a compact device.

[Brief description of the drawings]

FIG. 1 is a top view showing the configuration of a rotation transmission mechanism of a recording / reproducing apparatus according to an embodiment of the present invention, FIG. 2 is a side sectional view of a take-up reel base, and FIG. FIG. 4 is a side sectional view showing a take-up reel base of the conventional recording / reproducing apparatus. 2 ... supply reel stand, 3 ... take-up reel stand, 14 ... reel base axis of take-up reel stand 3, 18 ... capstan motor,
20,21,22 …… Chusuke Gya, 23 …… Take-up reel stand Gya,
24,25,26 …… Gusuke Naka, 27 …… Growing early, 28 ……
Arm, 29: reel spindle of supply reel table 2, 31: mode switching cam gear, 33: mode switching motor, 36, 37,
38,39… Chusuke gear, 40… Mode switching cam gear.

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Shinichi Tanaka 1006 Kadoma Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (56) References JP-A-61-32246 (JP, A) JP-A-59-146469 (JP, A)

Claims (1)

(57) [Claims] 1. A supply reel table and a take-up reel table, each reel table axis of the supply reel table and a take-up reel table, and each reel table independently rotating on a concentric axis of each reel table axis. A recording / reproducing apparatus having a first rotating body and a second rotating body which are freely held, wherein the first rotating body is a rotating force transmitted from a first drive source during fast-forward rewinding of the tape. The recording / reproducing apparatus, wherein the second rotating body is a switching cam gear that converts the rotational force transmitted from the second driving source into an operation mode switching.