KR100215972B1 - Reel driving idler device for vcr - Google Patents

Abstract

The present invention relates to a VCR reel-driving idler device for improving a reel driving mechanism for playing back or rewinding a VCR tape.

The VCR reel-driving idler device includes an idler 13 rotatably connected to a hinge shaft 19 and formed in a wide flat structure, a first spur gear (not shown) mounted rotatably on the idler 13, An idle gear 13a formed with a toothed gear engaging with the first spur gear 12a or the second spur gear 12a and a second spur gear 12b formed with a predetermined curvature so as to support one end of the idler 13 without restraint, A guide rail 14 and stop pins 14a and 14b provided at both ends of the guide rail 14 for stopping the idler movement of the idler 13 at appropriate positions of the idle gear 13a .

Accordingly, the present invention has the effect of quickly and accurately performing the operation of switching the movement of the VCR tape while performing two mechanisms for driving the reel table for playing back or rewinding the VCR tape with one capstan motor.

Description

VCR reel-driven idler device

More particularly, the present invention relates to a VCR reel driving idler which performs a switching operation of a VCR tape by using a single motor in a reel driving mechanism for regenerating or rewinding the VCR tape, ≪ / RTI >

In general, a VCR reads video and audio signals while moving a VCR tape storing a magnetic signal at a constant speed, and outputs the converted video signals to a receiver. Conversely, the VCR converts video and audio signals input to a receiver into magnetic signals, As a main function.

In addition, the VCR tape has auxiliary functions such as fast rewinding of the VCR tape or playback of a fast screen or a slow screen, and its major mechanical structure is explained through a perspective view of the inside of the VCR of FIG.

The reel driving mechanism for driving the VCR tape includes a first reel table 11, a second reel table 12 and a capstan motor 15 as main components. The first and second brakes 16 and 17 ) Are supplementarily connected to each other.

The capstan motor 15 is an important functional part that transmits rotational force to the first reel table 11 or the second reel table 12 while rotating the pin shaft 15a fixed to the rotation shaft at a constant speed.

The pin shaft 15a is brought into contact with the pinch roller 18a mounted on the roller lever 18 so as to push and convey the VCR tape inserted therebetween. The roller lever 18, which is reciprocally pivotally mounted, 18a and the pin shaft 15a.

The first reel table 11 is composed of a portion inserted into the reel of the VCR tape and a first spur gear 11a receiving a rotational force and receives a part of the power generated by the capstan motor 15, It performs the function of wrapping the VCR tape.

The second reel table 12 is constituted by a portion to be inserted into the reel of the VCR tape and a second spur gear 12a to receive a rotational force, receives a part of the power generated by the capstan motor 15, It performs the function of wrapping the VCR tape.

The first reel table 11 and the second reel table 12 are provided with the first brake 16 and the second brake 17 so that when each of the rehearsing operation or the rewinding operation is completed, Thereby preventing the extra rotation from continuing.

At this time, in the VCR having such a reel driving system, the mechanism device that connects the power of the capstan motor 15 to either the first reel table 11 or the second reel table 12 and switches the connection to the other reel table 12, And accuracy.

On the other hand, although not shown in the drawings, the conventional reel drive switching mechanism is provided with the first spur gear 11a or the second spur gear 12a when the connection to the first reel table 11 or the second reel table 12 is switched, The rotation speed of the reel may not be uniform and the VCR tape may be damaged.

Even when the reel drive switching mechanism device normally operates the first reel table 11 or the second reel table 12, the first spur gear 11a or the second spur gear 12a is disengaged from the first spur gear 11a or the second spur gear 12a, Is stopped.

Accordingly, the present invention provides a VCR reel-driving idler device for quickly and accurately performing an operation of switching a motion of a reel table for replaying or rewinding a VCR tape by using two mechanisms as a single capstan motor The purpose of that is to do.

1 is a perspective view showing an inner configuration of a VCR to which the present invention is applied;

2A and 2B are diagrams showing the means for preventing the idler from rising, respectively.

DESCRIPTION OF THE REFERENCE NUMERALS

11: first reel table 11a: first spur gear

12: second reel table 12a; The second spur gear

13: idler 13a: idle gear

14: guide rail 14a, 14b: stop pin

14c: Jaw 15: Capstan motor

15a: pin shaft 16: first brake

17: second brake 18: ruler lever

18a: Pinch roller 19: Hinge shaft

24: Auxiliary rail

In order to achieve the above object, the present invention provides a recoil operation of a VCR tape by a reel driving mechanism that connects the power of the capstan motor to either the first spur gear of the first reel table or the second spur gear of the second reel table A VCR for performing a rewinding operation, comprising: an idler rotatably connected to a hinge axis and formed in a wide fuzed structure; An idle gear rotatably mounted on the idler and formed with a toothed gear engaged with the first spur gear or the second spur gear; A guide rail having a predetermined curvature so as to support one end of the idler without restraint and to enable sliding movement of the idler; And a stop pin provided at both ends of the guide rail for stopping the idle movement of the idler at a suitable position where the idle gear is meshed.

In order to prevent the guide rails from rising during the pivoting motion, auxiliary rails having the same curvature as the guide rails are fixed to the stop pins on both sides of the guide rails, And at least the stop pin on the second reel table side.

[Example]

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a perspective view showing an internal configuration of a VCR to which the present invention is applied.

The VCR reel-driving idler device of the present invention is configured such that the power of the capstan motor 15 is transmitted to either the first spur gear 11a of the first reel table 11 or the second spur gear 12a of the second reel table 12 The present invention is applied to a VCR that performs a reproducing operation or a rewinding operation of a VCR tape by a reel driving mechanism that connects the tape drive unit to one side.

The present invention includes an idler 13, an idle gear 13a, a guide rail 14, stop pins 14a, 14b, and the like.

The idler 13 is rotatably connected to the hinge shaft 19, and is formed in a wide flat structure. The flat plate structure of the idler 13 increases the sliding contact area around the hinge shaft 19 so that the twist does not occur during the swinging motion of the idler 13.

In addition, since the width of the idler 13 is increased, the section modulus is increased and the strength against the bending moment is improved. Accordingly, the deflection of the idle gear 13a, which will be described later, due to its weight is minimized, and the smooth rotation of the idle gear 13a is assured.

The idle gear 13a is rotatably mounted on the idler 13 and is formed with a tooth engaging with the first pin gear 11a or the second spur gear 12a.

That is, the idle gear 13a has the same pitch difference as the first spur gear 11a and the second spur gear 12a in module, pitch, and the like.

It is also possible that the idle gear 13a, the first spur gear 11a, and the second spur gear 12a use helical gears having the same module, pitch, and helical angle.

On the other hand, a reel driving gear (not shown) connected to the hinge shaft 19 and connected to the pulley of the capstan motor 15 by a belt rotates the idle gear 13a.

For example, when the capstan motor 15 rotates clockwise (during a regenerating operation), the hinge shaft 19 and the idler 13 pivot clockwise to engage the idle gear 13a with the first spur gear 11a At the same time, the clockwise rotation of the reel driving gear rotates the idle gear 13a in the counterclockwise direction to induce clockwise rotation of the first reel table 11, so that the VCR tape is wound on the right-side reel.

On the other hand, when the capstan motor 15 rotates counterclockwise (during a rewinding operation), the hinge shaft 19 and the idler 13 are rotated counterclockwise, and the idle gear 13a is rotated in the counterclockwise direction And the counterclockwise rotation of the reel driving gear rotates the idle gear 13a in the clockwise direction to induce the second reel table 12 to rotate in the counterclockwise direction, so that the VCR tape is wound on the left-side reel.

The guide rail 14 is formed with a predetermined curvature so as to support one end of the idler 13 without restraint and enable sliding sliding motion.

In order for the idler 13 to smoothly reciprocate around the hinge shaft 19, the curvature of the guide rail 14 assumes the hinge axis 19 as the center of the figure.

On the other hand, as shown in the figure, one end of the idler 13 may have the same end as the curvature of the guide rail 24.

At this time, stop pins 14a and 14b are provided at both ends of the guide rail 14 to stop the idler 13 from rotating at an appropriate position of the idle gear 13a.

That is, the pivotal movement of the idler 13 is stopped at a point where the pitch circle of the idler 13a and the pitch circle of the first spur gear 11a or the second pitch gear 12a come into contact with each other.

Figs. 2A and 2B show a configuration diagram showing means for preventing the idler from rising, respectively.

When the idler gear 13 is placed on the guide rail 14 at the free end, the idle gear 13a comes into contact with the first power gear 11a or the second spur gear 12a, During operation, the loading of the VCR tapes may be uneven (especially during sudden overload), resulting in disengagement of the coupling.

As a result, the rotating speed of the reel may become uneven and the VCR tape may be damaged as described above. Therefore, the following two methods are suggested in the drawing.

As a first means, the auxiliary rail 24 having the same curvature as that of the guide rail 14 is fixed to the stop pins 14a and 14b on both sides so that the guide rail 14 is prevented from rising during the turning motion do.

The gap between the guide rail 14 and the auxiliary rail 24 is slightly larger than the thickness of the idler 13 to ensure smooth movement of the idler 13 and prevent lifting during reciprocating motion.

The auxiliary rail 24 may have an arbitrary curvature depending on the case, or may have a linear shape.

As a second means, instead of mounting the auxiliary rail 24 on the guide rail 14, the stop pins 14b on the side of the side stop pins 14a, 14b or at least the side of the second reel table 12, 14c are fixed so that the guide rails 14 are prevented from rising during the pivot movement.

The lifting effect of the idler 13 is generated when the idle gear 13a is once engaged with the first spur gear 11a or the second spur gear 12a and thus the two stop pins 14a, It is possible to prevent the guide rail 14 from rising during the pivotal motion by merely fixing the jaw 14c.

The lifting of the idler 13 occurs most severely when the second spur gear 12a is rotated at a high speed and the VCR tape is rewound. As a result, only the stop pin 14b on the second reel table 12 side It is possible to prevent the guide rail 14 from rising in the swinging motion even if the stopping jaw 14c is fixed.

In the second case, the length of the stop pin 14b prevents the idler gear 13 from rising as much as the idler gear 13a and the first spur gear 11a or the idle gear 13a and the second spur gear 12a are not shaken.

As described above, the VCR reel-driving idler apparatus of the present invention improves the mechanism for driving the reel table for playing or rewinding the VCR tape, So that it can be performed quickly and accurately.

Although the present invention has been shown and described with respect to certain preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as set forth in the following claims Those skilled in the art will readily understand the present invention.

Claims (3)

The power of the capstan motor 15 is transmitted to the first spur gear 11a of the first reel table 11 or the second spur gear 12a of the second reel table 12 by a reel driving mechanism A VCR for performing a reproducing operation or a rewinding operation of a VCR tape, comprising: an idler (13) rotatably connected to a hinge shaft (19) and formed in a wide flat plate structure; An idle gear (13a) rotatably mounted on the idler (13) and formed with a toothed gear engaged with the first spur gear (11a) or the second spur gear (12a); A guide rail 14 having a predetermined curvature so as to support one end of the idler 13 without restraint and to enable sliding motion of the idler 13; And stop pins 14a and 14b provided at both ends of the guide rail 14 to stop the pivotal movement of the idler 13 at an appropriate position where the idle gear 13a is engaged. VCR reel driven idler device. The slide fastener according to claim 1, wherein the stop pins (14a) and (14b) on both sides of the guide rail (14) are provided with auxiliary rails (24) of the VCR reel. 2. The apparatus according to claim 1, wherein the stop pins (14a) (14b) on both sides of the guide rail (14) or at least the detents (14c) is fixed to the VCR reel driving gear (14b).