JPH11250531A - Reel base drive - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a high-speed rewinding means in a reel base drive mechanism for transporting a magnetic tape, which reduces a rotational load applied to a supply reel base when the magnetic tape is fast-forwarded in a reverse direction. . SOLUTION: When fast-forwarding a magnetic tape in the reverse direction,
An engaging portion 18a of the pinch roller arm 18 and a rotating arm 16 are provided, and the engaging portion 18a of the pinch roller arm 18 presses the engaging portion 16a of the rotating arm 16, and a second relay The gear 10 is rotated to separate the load gear 9 from the second relay gear 10 to reduce the rotational load on the supply reel base 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reel drive unit for use in, for example, a camera-integrated magnetic recording / reproducing apparatus for transporting a magnetic tape. It has a characteristic in the structural configuration.

[0002]

2. Description of the Related Art Conventionally, as a reel base driving device for reversibly driving a magnetic tape, a camera-integrated magnetic recording / reproducing device having the structure shown in FIGS. 7 to 10 has been put to practical use. 1 is a capstan selectively driven in both forward and reverse directions by a capstan motor 1a as a drive source, and 3 is a pinch roller which presses and rotates on the capstan 1 to convey the magnetic tape in the forward or reverse direction. The chassis 20 is rotatable by a pinch roller arm support shaft 23.
Is rotatably attached to one end of a pinch roller arm 18 attached to the arm. 4 is a drive belt for transmitting the driving force of the capstan motor 1a to the transmission gear 5, 6
Is a first oscillating gear that meshes with the transmission gear 5 and transmits its rotation to a reel base (hereinafter referred to as a supply reel base) 14 on the magnetic tape supply side during normal recording, and 7 meshes with the transmission gear 5. A second swinging gear 8 for transmitting the rotation to a reel base (hereinafter referred to as a take-up reel base) 12 on the winding side of the magnetic tape at the time of normal recording is provided by the transmission gear 5 and the first and second gears. A swing arm 9 which is selectively rotated in accordance with the rotation direction of the capstan 1 together with the swing gears 6 and 7 is rotatably supported at one end of the swing arm 8 with a predetermined rotational load. The load gear 22 is a transmission gear support shaft for holding the transmission gear 5.

[0003] Reference numeral 11 denotes a first relay gear for transmitting the rotation of the second swinging gear 7 to the take-up reel table 12; 10 a second relay gear meshing with the first relay gear 11; Is a relay gear support shaft that holds the first relay gear 11, and constitutes a second drive mechanism together with the second swing gear 7, the first and second relay gears 11, 10. .

[0004] Reference numeral 13 denotes a third relay gear for transmitting the rotation of the first swinging gear 6 to the supply reel table 14, and constitutes a first driving mechanism.

The relay gear support shaft 21 and the transmission gear support shaft 22 are fixed to a chassis 20.

FIGS. 7 and 8 show a magnetic tape (not shown).
In the reverse direction, that is, when the first and second swing gears 6 and 7 and the relay gears 10, 11 and 13 are located at the time of reverse playback, fast forward playback and fast forward. As the capstan 1 rotates in the counterclockwise direction, the transmission gear 5 also rotates in the counterclockwise direction, and the swing arm 8 moves about the second rotation position, that is, about the transmission gear support shaft 22. Since the first swing gear 6 and the third relay gear 13 are separated from each other to rotate in the counterclockwise direction, the second swing gear 7 and the first relay gear 11 mesh with each other. The rotation of the capstan 1 transmits the rotation to the take-up reel table 12,
The magnetic tape is transported in the forward direction, and the load gear 9 is located at the fourth position by rotating the swing arm 8 in the counterclockwise direction, that is, the second position.
, The load on the take-up reel table 12 is reduced, and the magnetic tape conveyed by the capstan 1 and the pinch roller 3 is
It is configured to be conveyed to the take-up reel table 12.

Further, when the magnetic tape is fast-forwarded in the reverse direction, a tape loading device (not shown) operates according to an instruction of the operation mode, and the pinch roller arm 1
8 rotates around the pinch roller arm support shaft 23 (from the position A representing the fifth position to the position B representing the sixth position in FIG. 7), the magnetic tape is rotated by the capstan. 1 and is smoothly transported to the supply reel table 14.

On the other hand, FIGS. 9 and 10 show the first and second oscillating relay gears 6 when the magnetic tape is transported in the forward direction, that is, at the time of forward-direction recording and reproduction and fast-forward reproduction.
7 and a state in which the relay gears 10, 11, and 13 are located. As the capstan 1 rotates clockwise, the transmission gear 5 also rotates clockwise, and the swing arm 8 rotates in the first rotation. The first swing gear 6 and the third relay gear 13 are meshed with each other to rotate in the clockwise position around the transmission gear support shaft 22, and the second swing gear 7 And the first relay gear 11 are separated from each other, and the rotation of the capstan 1 conveys the magnetic tape to the supply reel table 14 side, and transmits the rotation to the supply reel table 14 to rotate the magnetic tape. The load gear 9 is located at the third position at this time by the clockwise rotation of the swing arm 8, that is, the second relay gear 10. Mesh with Therefore, the load of the supply reel table 14 is heavier, the magnetic tape carried by said capstan 1 are configured to convey said supply reel table 14.

[0009]

The magnetic tape is conveyed by the above arrangement. When the magnetic tape is fast-forwarded in the reverse direction, the video head stably traces the recorded video signal. In particular, in a device that requires power saving and miniaturization, such as a camera-integrated recording / reproducing device, if the load gear 9 is engaged as described above, power is wasted, and There was a problem that the fast-forward time in the direction became longer.

In view of the above-mentioned problem, the present invention is to rotate the load gear 9 at the time of rapid traverse in the reverse direction, and
4 is to reduce the load and provide a specific configuration of a reel base driving device that performs high-speed reverse fast forward.

[0011]

In order to solve the above-mentioned problem, a reel stand driving device of the present invention rotates a load gear by rotating a pinch roller arm at the time of a rapid feed in a reverse direction, so that a supply reel stand is rotated. It is characterized in that it is configured to reduce the rotational load, and this configuration makes it possible to save power and reduce the fast-forward time in the reverse direction, especially for a camera-integrated magnetic recording / reproducing device, without impairing the miniaturization of the device. A great effect can be obtained for realizing.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION
A first drive mechanism for driving a first reel base serving as a supply side of a magnetic tape during normal recording, and a second driving mechanism for driving a second reel base serving as a take-up side of the magnetic tape during normal recording
A driving mechanism, a swing arm that selectively turns to a first turning position and a second turning position according to the rotation direction of the driving source, and a swing arm that is supported by the swing arm,
When the swing arm is located at the first rotation position, the rotational force of the drive source is applied to the first drive mechanism.
A swing gear for selectively transmitting the torque of the drive source to the second drive mechanism when the swing arm is located at the second rotation position; and a predetermined rotation of the swing arm. The swing arm is rotatably supported with a load, and is located at a third position when the swing arm is located at the first rotation position, and at a fourth position when the swing arm is located at the second rotation position. In this position, the load gear that moves and the pinch roller are rotatably supported, and the pinch roller pivots between a fifth position where the pinch roller is pressed against the capstan and a sixth position that is separated from the capstan. A rotatable pinch roller arm and a relay gear that always rotates with the second drive mechanism, and rotates in conjunction with the rotation of the pinch roller arm to rotate the pinch roller. A reel arm driving device comprising a rotating arm for engaging the relay gear with the load gear located at the fourth position when the arm is at the sixth position, wherein the power saving and the reverse direction are provided. Has the effect that the fast-forward time can be reduced.

(Embodiment) The first aspect of the present invention will be described below.
The embodiment of the invention described in (1) will be described with reference to FIGS. Components having functions similar to those of the above-described conventional example are denoted by the same reference numerals.

FIG. 1 is a plan view of a main part of a reel stand driving device according to an embodiment of the present invention during reverse reproduction and fast forward reproduction, and FIG. 2 is a front view of the same device during reverse reproduction and fast forward reproduction. , FIG. 3 is a plan view of the main part of the device at the time of rapid traverse in the reverse direction, FIG. FIG. 6 is a plan view of a main part of the apparatus when recording and reproducing in the forward direction and fast-forward reproduction. FIG.

The difference from the above-described conventional reel base driving device is that a rotating arm 16 that can rotate around a relay gear support shaft 21 of the first relay gear 11 is provided. A second relay gear 10 is engaged with the first relay gear 11 at the tip end so as to be rotatable, and the rotation arm 1
6 is that the outer periphery of the first relay gear 11 is moved while maintaining the engagement state with the first relay gear 11 with the rotation of the pinch roller arm 18. At the other end, the rotating arm 16 is engaged with the engaging portion 16 a formed on the rotating arm 16 by the rotating position of the pinch roller arm 18. The point is that an engaging portion 18a for rotating is formed.

That is, when the magnetic tape is reproduced in the reverse direction / fast-forward reproduction, the swing arm 8 drives the take-up reel table 12 as shown in FIGS. 2, the pinch roller arm 18 is located at a fifth position where the pinch roller 3 is pressed against the capstan 1, that is, the engaging portion 18 a of the pinch roller arm 18 is When the engaging portion 16a of the moving arm 16 is pressed, the second relay gear 10
Is rotated about the relay gear support shaft 21, and the load gear 9 and the second relay gear 10 located at the fourth position are engaged with each other as in the related art, and the supply reel table 14 or the take-up reel table is engaged. A rotation load for suppressing the rotation of the motor 12 is generated.

In this state, when an operation of fast-forwarding the magnetic tape in the reverse direction is instructed, as shown in FIGS. 3 and 4, the pinch roller arm 18 is moved by a tape loading device to a pinch roller arm support shaft 23. , And rotates from the fifth position to the sixth position, losing the pressure contact with the capstan 1 and losing engagement with the rotating arm 16. As a result, the turning arm 16 is turned counterclockwise by the tension spring 17, and the load gear 9 moves from the fourth position to the third position and is separated from the second relay gear 10. Thus, the rotational load of the supply reel table 14 can be reduced.

Next, when an operation for recording / reproducing and fast-forward reproducing the magnetic tape in the forward direction is instructed, as shown in FIGS. The load gear 9 and the second relay gear 10 are separated regardless of the position of the second relay gear 10.

According to this configuration, in the magnetic recording / reproducing apparatus integrated with the camera, the power consumption of the conventional 4.5 V and 150 mA can be reduced to about 4.5 V and 135 mA, and the power saving of about 10% can be realized. With a 20-minute tape, the conventional 7-minute rewinding time can be reduced by about 3.5 minutes, or about 50%.

[0020]

As described above, according to the reel stand driving device of the present invention, when the magnetic tape is fast-forwarded in the reverse direction, the engaging portion of the pinch roller arm presses the engaging portion of the rotating arm. The second relay gear is rotated to separate the load gear from the second relay gear, thereby reducing the rotational load on the supply reel base. An advantageous effect that the fast-forward time can be reduced can be obtained.

[Brief description of the drawings]

FIG. 1 is a plan view of a main part of a reel stand driving device according to an embodiment of the present invention during reverse reproduction and fast forward reproduction.

FIG. 2 is a cross-sectional view of a main part viewed from the front during reproduction in the reverse direction and fast-forward reproduction of the reel base driving device.

FIG. 3 is a plan view of a main part of the reel base driving device during fast-forwarding in the reverse direction.

FIG. 4 is a cross-sectional view of a main part viewed from the front when the reel base driving device is fast-forwarded in a reverse direction.

FIG. 5 is a plan view of a main part of the reel base driving device during recording and reproduction in the forward direction and fast-forward reproduction.

FIG. 6 is a cross-sectional view of a main part of the reel base drive device as viewed from the front during recording and reproduction in the forward direction and fast-forward reproduction.

FIG. 7 shows recording and reproduction in the reverse direction of the conventional reel base driving device;
Top view of main part during fast forward playback and fast forward

FIG. 8 shows recording / reproduction in the reverse direction of the conventional reel base driving device,
Sectional view of main part viewed from the front during fast forward playback and fast forward

FIG. 9 is a plan view of a main part of a conventional reel base driving device at the time of forward-direction recording / reproduction and fast-forward reproduction.

FIG. 10 is a cross-sectional view of a main part viewed from the front when performing recording and reproduction in a forward direction and fast-forward reproduction of a conventional reel base driving device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Capstan 3 Pinch roller 4 Drive belt 5 Transmission gear 6 1st swing gear 7 2nd swing gear 8 Swing arm 9 Load gear 10 2nd relay gear 11 1st relay gear 12 Take-up reel stand 13 Third relay gear 14 Supply reel base 16 Rotating arm 16a Engagement part 17 Tension spring 18 Pinch roller arm 18a Engagement part 20 Chassis 21 Relay gear support shaft 22 Transmission gear support shaft 23 Pinch roller arm support shaft

Claims (1)

[Claims] 1. A first drive mechanism for driving a first reel base serving as a magnetic tape supply side during normal recording, and a second reel base serving as a magnetic tape take-up side during normal recording. A second drive mechanism, a swing arm that selectively rotates between a first rotation position and a second rotation position according to the rotation direction of the drive source, and a rotatably supported by the swing arm. When the swing arm is located at the first rotation position, the rotational force of the drive source is applied to the first rotation position.
When the swing arm is located at the second rotation position, the rotational force of the drive source is transmitted to the second drive mechanism.
And a swing gear that selectively transmits to the drive mechanism, and a rotatable support having a predetermined rotational load on the swing arm, wherein the swing arm is located at the first rotation position. In a third position, when the swing arm is located in the second rotation position, a load gear moving and a pinch roller are rotatably supported at a fourth position, and the pinch roller is supported by the capstan. A pinch roller arm that pivots between a fifth position for crimping and a sixth position away from the capstan, and a rotatable support for a relay gear that always rotates with the second drive mechanism; When the pinch roller arm is located at the sixth position, the relay gear is rotated in conjunction with the rotation of the pinch roller arm, and the relay gear is connected to the load gear located at the fourth position. The reel table driving device having the rotating arm occupying engage the.