KR100274645B1 - Apparatus for transer control of ideler power of tape recorder - Google Patents

Abstract

The present invention relates to an idler power transmission control apparatus of a magnetic recording and reproducing apparatus, comprising: a slide means for linear reciprocating motion on a main base according to each mode by a single salvage power, and rotatably installed on a predetermined portion of the sub-chassis. And an idler stopper means interlocked by the slide means in a specific mode to regulate the rotational operation of the idle plate, and elastic means for elastically supporting the idler stopper means in one direction.

According to the present invention as described above, by preventing the idle gear is engaged with the feed reel gear in the STOP mode by the drive of the idler stopper means to prevent damage to the tape generated when the deck is left for a long time in the STOP mode, When switching from PB mode to STOP mode, noise from gear bites of feed reel gear and idle gear is prevented.

Description

Idler power transmission controller of magnetic record player

The present invention relates to a power transmission system of a magnetic recording and regenerator for selectively transmitting power to a traveling system and a loading system using only a capstan motor, and more particularly, to prevent gears from being engaged with gears to be fed in a specific mode. In addition, the present invention relates to an idler power transmission control device of a magnetic recording and reproducing apparatus which prevents tape damage that may occur when the deck is left for a long time in a certain mode, and also prevents noise caused by gear bites during mode switching.

In general, magnetic recording players such as video tape recorders have been developed in various forms by many advanced companies for a long time, and nowadays, they are almost spread in each household and feel like a living necessity for modern people.

Most of the magnetic recorders currently used for home use mainly ½-inch tape cassettes using the VHS (Video Home System) method.

Such a magnetic recording / playback apparatus includes a cassette holder in which a tape cassette is mounted, drive members for drawing the cassette holder into the main body of the apparatus and seating the main cassette on the main deck, and a magnetic tape stored in the tape cassette. And a tape loading / unloading device for loading or unloading to the rotating head drum side installed on the main deck, and a tape guide device for guiding the magnetic tape to run along a predetermined path.

When the tape cassette is lightly pushed into the cassette inlet of the magnetic recorder configured as described above, the tape cassette is accommodated in the cassette holder and the cassette holder is seated on the main deck, and then the tape loading / unloading device. The magnetic tape is led and loaded onto the head drum which is rotating at a high speed by the supply and winding-side pole base constituting the signal to record the signal on the magnetic tape or to reproduce the recorded signal.

Recently, a portable camera-integrated tape recorder has been widely known by applying the magnetic recording and reproducing apparatus. The new type of magnetic recording and reproducing apparatus has been made as small as possible in order to further increase user convenience. Of course, efforts are being made to reduce the weight.

In general, one of the biggest influences on the size and weight of the product is known as the deck size, and the size and size of the deck can be reduced depending on how much the deck size is reduced. It is a measure of the technology level, and in fact, each advanced company has been researched and developed in various forms and ways.

As a result of the research and development as described above, Korean Patent Application No. 93-5016 (name; magnetic recording / playback apparatus and mode control method thereof) is known by the applicant.

The magnetic recording and reproducing apparatus, as known, can completely accommodate the rotating drum in the inner space of the tape cassette when the loading operation of the tape cassette is completed, thereby minimizing the chassis size, and easily loading and traveling the magnetic tape by a single driving source. At the same time, it is possible to control each mode without a separate device to reduce the number of components is a technical feature.

The magnetic recording and reproducing apparatus having the above characteristics is provided with a power transmission system for selectively supplying power to a supply reel and a take-up reel installed on the upper chassis. Embodiments thereof will be described with reference to the accompanying drawings.

As shown in FIG. 1, a capstan motor 202 is mounted on one side of the lower chassis 201 to forward and reverse rotation according to all control signals. The bracket 204 is attached to the gear 203 of the capstan motor 202. The transmission gear 207 which is connected to the upper lever 205 and rotates about the shaft 206 is geared and rotated left and right according to the rotation direction of the capstan motor 202 so that the rotational force of the capstan motor 202 is magnetic tape. It is configured to selectively transmit to the loading system or the traveling system.

Looking at the configuration of the magnetic tape traveling system, the second gear 208 on the lower chassis 201 is rotated about an axis to allow gear alignment with the transmission gear 207 for transmitting the rotational force of the capstan motor 202. And a pulley 209 and a driven gear 210 formed on the second gear 208 are connected by a belt 211, and an upper side thereof is connected to the driven gear 210 by a lever 212. The idle gear 213 is gear-aligned so that the idler gear 213 is rotated left and right in accordance with the rotation direction of the capstan motor 202, and the supply reel 214 and the winding are respectively installed on both sides of the upper surface of the upper chassis (not shown). The rotational force is selectively transmitted to the gears 215 and 217 of the reel 216.

At this time, the idle gear 213 is directly geared to the gear 215 formed on the outer circumferential surface of the supply reel 214, the winding reel 215 is wound through a plurality of auxiliary gears (218, 219) ( It is connected to the gear 217 formed on the outer circumferential surface of the 215 to transfer the rotational force of the capstan motor 202.

However, in the power transmission system of the magnetic recording and reproducing apparatus as described above, since there is no separate configuration for controlling the idle gear 213 irrespective of the conversion operation of each mode, when the deck is left in a specific mode for a long time. There was a disadvantage of damaging the tape, there was also a problem such as noise generated by the bite of the gear during mode conversion.

In more detail, when the STOP mode is applied in the PB mode, the lever 212 rotates counterclockwise with respect to the rotation center, and the idle gear 213 meshes with the gear 215 of the supply reel 214. The rotation of the supply reel 214 applies a predetermined tension to the magnetic tape lying on the travel path. When left in such a state for a long time, the magnetic tape may be damaged by a predetermined tension, and the noise may be caused by the biting action of the gear 215 and the idle gear 213 of the supply reel 214. There were several issues.

Accordingly, a main object of the present invention is to provide an idler power transmission control apparatus of a magnetic recording and reproducing apparatus capable of preventing the tape from being damaged when the deck is left for a long time in the STOP mode.

It is another object of the present invention to provide an idler power transmission control apparatus of a magnetic recording and reproducing apparatus capable of preventing noise caused by gearing of a feed reel and idle gear at the time of switching from the PB mode to the STOP mode.

1 is a plan view showing an idler device of a magnetic recording player according to the prior art;

2 and 3 show the deck mechanism of the magnetic recording player equipped with a tape guide device using the drum motor of the present invention,

2 is a plan view in a state where the sub chassis is coupled;

3 is a plan view in a state where the sub chassis is removed.

4 and 5 are for explaining the configuration and operation of the idler power transmission control apparatus according to the present invention,

4 is a plan view of the STOP mode.

5 is a plan view of the PB mode.

Figure 6 is an exploded perspective view showing the configuration of the idler power transmission control apparatus according to the present invention.

7 and 8 show another embodiment of the idler power transmission control apparatus according to the present invention,

7 is a plan view of the STOP mode.

8 is a plan view of the PB mode.

<Explanation of symbols for main parts of drawing>

2 ; Subchassis 4; Function plate

61; Idle plate 61 '; Idler catch

64; Locking portion 65; Idler stopper

66; Shaft section 67; Longevity

68; Operating section 69; Elastic ribs

70; Stopper catch 171; Guide pin

172; Idle stopper 173; Elastic member

174; Actuator 175; Longevity

176; Fixing part 177; Hang

As one embodiment for achieving the object of the present invention as described above, the sub-chassis in which the tape cassette is stored in the main chassis is installed to enable linear reciprocating movement in the front-rear direction, the idle force of the single drive source is supported on the idle plate A magnetic recording and reproducing apparatus configured to be transmitted to a supply reel assembly or a take-up reel assembly through a gear, comprising: slide means for linear reciprocating motion on a main base according to each mode by the power of the single salvage pupil, and a predetermined portion of the sub chassis; A magnetic recording and reproducing apparatus, comprising: an idler stopper means rotatably installed and interlocked by a slide means in a specific mode to regulate the rotation of the idle plate, and an elastic means elastically supporting the idler stopper means in one direction. Idler power The moon controls are provided.

An elastic means is integrally formed on the idler stopper means.

In addition, as another embodiment for achieving the object of the present invention, the sub-chassis in which the tape cassette is accommodated in the main chassis is installed to enable linear reciprocating movement in the front-rear direction, the idle gear is supported on the idle plate rotational force of a single drive source In the magnetic recording and reproducing apparatus configured to be delivered to the supply reel assembly or the winding reel assembly through the power supply, the slide means for linear reciprocating motion on the main base according to each mode by the power of the single salvage copper, and is supplied while interlocked by the slide means A supply side brake means for controlling the rotational operation of the reel assembly, an idler stopper means coupled to a predetermined portion of the sub chassis so as to be linearly reciprocated and interlocked by the supply side brake means in a specific mode to regulate rotation of the idle plate; , The idlers The idler power transmission control device of a magnetic recording regenerator that is configured by an elastic means for elastically supporting the buffer means in one direction, characterized in, is provided.

The elastic means is characterized in that the tension coil spring.

Hereinafter, an idler power transmission control apparatus for a magnetic recording and reproducing apparatus according to the present invention will be described according to the embodiment shown in the accompanying drawings.

2 and 3 show the deck mechanism of the magnetic recording player equipped with the tape guide device using the drum motor of the present invention, Figure 2 is a plan view of the sub-chassis coupled state, Figure 3 is a separate sub-chassis It is a top view in a state.

Hereinafter, an idler power transmission control apparatus for a magnetic recording and reproducing apparatus according to the present invention will be described according to the embodiment shown in the accompanying drawings.

First, the structural features of the magnetic recording and playback apparatus to which the idler power transmission device of the present invention is applied are as follows.

That is, the deck mechanism of the magnetic recorder according to the present invention includes a traveling system for driving the reel of the tape cassette by using one power source, that is, the power of the capstan motor M, and a loading for moving the tape of the tape cassette to the travel path. The system is configured to selectively drive the system.

The loading system can be divided into supply side pole base driving means, winding side pole base driving means interlocked with the supply side pole base driving means, and loading system power transmission adjusting means in view of its technical configuration and operation.

Looking at the configuration of the deck mechanism of the magnetic recorder according to the present invention as described above, the sub-chassis (2) on the upper surface of the main base (1) under the guidance of the usual guide means to enable linear reciprocating movement by a predetermined length The cam gear 3 is rotatably coupled to one side of the upper surface of the main base 1, that is, the lower side of the sub chassis 2, so that the main base 1 adjacent to the cam gear 3 is rotated. The other side of the upper surface is provided with a power transmission means for transmitting the power of the capstan motor (M) to the cam gear (3), and a function plate (4) on the upper side of the cam gear (3) and the power transmission means cam gear By the rotation of (3), it is coupled so that a linear reciprocation movement by a predetermined length in the left and right directions is possible.

The sub-chassis 2 includes a traveling system, a supply side pole base driving means and a winding side pole base driving means which constitute the loading system, and a supply reel assembly 10 and a winding reel assembly 20 provided at predetermined intervals. ), Supply and take-up brake means (11) (21) for applying braking force to the supply reel assembly (10) and the take-up reel assembly (20), and a tension post (5) for adjusting the tape tension during loading of the tape. In addition, the pinch roller 6, the tape guide 7, etc. are provided.

The tension post 5 is erected on a tension lever 9 coupled to be rotatable about an axis pin 8, the tension lever 9 being sub-chassis by a cam groove 1a formed in the main base 1. It is comprised so that it may cooperate with the movement operation | movement of (2).

The power transmission means is coupled to the motor gear 31 of the capstan motor (M), the drive gear pulley 32 is rotatably coupled to one side of the upper surface rear of the main base (1) and always engaged with the motor gear 31; A central gear pulley 36 coupled to the upper front middle portion of the main base 1 by a shaft pin 33 and having upper and lower gears 34 and 35 of different diameters integrally formed thereon; A timing belt 37 connecting the pulley 32 and the center gear pulley 36, and a gear train for selectively transmitting the rotational force of the center gear pulley 36 to the cam gear 3; Doing.

The gear train always fits the first power transmission gear 38 selectively engaged with the lower gear 35 of the center gear pulley 36 and the small gear 38 'of the first power transmission gear 38. The physics includes a second power transmission gear 39 and a third power transmission gear 40 that is always engaged with the second power transmission gear 39 and the cam gear 3.

An operating lever 42 having a predetermined shape is rotatably coupled to the rotation center axis 41 of the second power transmission gear 39, and a first power transmission gear is connected to one end of the operating lever 42. 38 is rotatably coupled to the shaft pin 43, so that the rotational force of the central gear pulley 36 is transmitted or blocked to the first power transmission gear 38 in accordance with the rotational operation of the operating lever 42. It is.

The function plate 4 is supported to allow left and right linear movement by conventional guide means, and the first cam pin 4 ′ fixed to a predetermined portion is the first cam groove 3a of the cam gear 3. Is inserted into the, and the linear reciprocating movement in the left and right directions in accordance with the rotation of the cam gear (3).

In addition, the interlocking lever 51 is coupled to the upper front edge portion of the main base 1 so as to be rotatable by the shaft pin 52, and the engaging pin 53 is fixed to the end of the interlocking lever 51. And a second cam pin 51 'is fixed to a predetermined portion of the interlock lever 51, and the second cam pin 51' is made of the cam gear 3. 2 is inserted into the cam groove 3b, and the sub chassis 2 is moved by interlocking the interlocking lever 51 with the rotation of the cam gear 3.

Meanwhile, the traveling system includes an idle plate 61 rotatably coupled to an upper end of a shaft pin 33 on which a center gear pulley 36 is supported and protrudes to an upper surface of the sub chassis 2, and the idle plate 61. Are rotatably coupled to the shaft pin 62 and selectively engaged with the reel gears 10a and 20a of the supply reel assembly 10 or the take-up reel assembly 20 according to the rotational direction of the center gear pulley 36. Gear 63 and idler power transmission control means for preventing the rotational force of the idle gear 63 is transmitted to the supply reel assembly 10 in a particular mode.

Referring to one embodiment of the idler power transmission control means, as shown in Figures 4 to 6, the engaging portion 64 is fixed to a predetermined portion of one side edge of the function plate 4 and the sub chassis 2 And an idler stopper 65 that is rotatably supported at a predetermined portion of the upper surface front side of the upper surface to regulate rotation of the idle plate 61.

The idler stopper 65 extends downward through the shaft portion 66 supported by the subchassis 2 and the long hole 67 formed in the subchassis 2 to the engaging portion 64 of the function plate 4. An actuating portion 68 that is selectively caught and an elastic rib 69 that retains its own elastic force are integrally formed, and at one end thereof, a stopper engaging portion that is caught by an idle catching portion 61 ′ formed on the idle plate 61. 70 is formed.

In addition, the supply side pole base driving means of the loading system is a rotary lever method that does not use a separate guide rail. Looking at the technical configuration, the shaft pin ( 71 and a shaft pin 73 on the upper surface of the rear sub-chassis 2 of the supply-side loading arm 72 and the supply side loading arm 72 rotatably coupled to the loading operation of the sub-chassis 2. It is rotatably coupled and interlocked with the supply side loading arm 72 and the supply side pole 74 is erected on one side and includes a fixed supply side pole base 75. Gear portions 72a and 75a are respectively formed at opposing portions of the supply side loading arm 72 and the supply side pole base 75 so as to be meshed with each other.

A guide hole 72b is formed at one side of the supply side loading arm 72, and a locking pin 76 fixed to the upper surface of the function plate 4 is inserted into the guide hole 72b.

Torsion spring (77) is elastically installed on the supply side loading arm (72), a part of which passes through the movement path of the guide hole (72b), the locking pin (76) in accordance with the movement of the function plate (4) ) Is guided by the guide hole 72b to move while receiving the elastic force of the torsion spring (77).

In addition, the winding side pole base driving means are coupled to each other rotatably coupled to the shaft pins 81 and 82 at predetermined intervals on the upper surface of the sub-chassis 2, the intermediate lever 84 And a guide rail 87 formed on the sub chassis 2 and connected to the winding-side loading arm 85 and the winding-side loading arm 85 and the connecting pin 86 that are interlocked with the intermediate lever 84. It includes a winding side pole base 88 which is moved along.

A locking pin 83a is fixed to one side end of the upper surface of the connection lever 83 and inserted into the guide hole 72c formed in the supply side loading arm 72, and the locking pin 83b is also provided on the other end of the connecting lever 83a. It is fixed. A locking groove 84a into which the other locking pin 83b of the connection lever 83 is inserted is formed at one side of the intermediate lever 84, and the other end of the intermediate lever 84 is wound on the loading arm. It is connected to the 86 and the connecting pin (89). In addition, a slant post 90 and a guide roller 91 are provided on an upper surface of the winding side pole base 88 connected to the winding side loading arm 86 and the connecting pin 86.

The intermediate lever 84 has a locking pin 84a formed at a predetermined portion of the lower surface thereof, and a cam hole 78 through which the locking pin 84a is guided is formed in the function plate 4, so that the function plate 4 is formed. The rotational movement is also possible for the movement.

The operation of the magnetic recording and reproducing apparatus according to the present invention configured as described above is as follows.

2 and 3 show the ESP mode of the magnetic recorder according to the present invention, in which the sub chassis 2 is maximally ejected from the main base 1, and the function plate 4 is the main base 1; It is located at the far right of the phase.

When the tape cassette is mounted in the cassette housing (not shown) in such a state, power is applied to the capstan motor M by the seating operation of the cassette housing so that the motor gear 31 rotates counterclockwise.

The rotational force of the motor gear 31 is transmitted to the drive gear pulley 32 → timing belt 37 → center gear pulley 36 to rotate the center gear pulley 36 clockwise.

At this time, the rotational force of the center gear pulley 36 is again lower gear 35 → first power transmission gear 38 → second power transmission gear 39 → third power transmission gear 40 → cam gear ( 3) the idle gear 63 which rotates the cam gear 3 clockwise and meshes with the upper gear 34 formed in the center gear pulley 36 by the rotation of the center gear pulley 36. Rotated).

At this time, since the idle plate 61 has a rotational force in the clockwise direction with respect to the shaft pin 33 which is the rotation center, the idle gear 63 is engaged with the reel gear 20a of the take-up reel assembly 20, and thus Rotate the take-up reel hub of the tape cassette to release the magnetic tape.

On the other hand, the sub-chassis 2 faces the inside of the main base 1 by the rotational operation of the interlocking lever 51 connecting the main base 1 and the sub chassis 2 by the rotation of the cam gear 3. The movement of the loading system is performed by the movement of the sub-chassis 2 just before the movement.

That is, since the supply side loading arm 72 is coupled to the engaging pin 76 of the function plate 4, the sub chassis 2 is assembled to the sub chassis 2 as the sub chassis 2 moves to the inside of the main base 1. The supply side loading arm 72 rotates clockwise about the shaft pin 71, so that the supply side pole base 75 which maintains the gear side with the supply side loading arm 72 is half the center pin 73. While rotating clockwise, the tension lever 9 also rotates counterclockwise about the shaft pin 8 along the cam groove formed in the main base 1.

At the same time, the connecting lever 83 connected to the supply side loading arm 72 and the one side locking pin 83a also rotates clockwise about the shaft pin 81 as the supply side loading arm 72 is rotated clockwise. Also, the intermediate lever 84 connected to the connecting lever 83 and the other locking pin 83b also rotates about the shaft pin 82 in the counterclockwise direction.

As described above, the rotational force of the winding-side loading arm 85 connected to the intermediate lever 84 acts in the direction of pushing up the winding-side pawl base 88 by the rotation of the intermediate lever 84, The pole base 88 is to move along the guide rail 87 formed in the sub chassis (2).

Thus, the magnetic tape of the tape cassette includes the supply side pawl 74 of the supply side loading arm 72, the tension post 5 of the tension lever 9, and the slant post 90 of the winding side pole base 88. It is loaded by the guide roller 91 to both sides of the rotating head drum rotating at high speed.

Then, when the cam gear 3 rotates slightly further clockwise at the time when the loading operation of the magnetic tape is almost completed, the function plate 4 moves to the left in the drawing, so that the locking pin of the function plate 4 is rotated. 76 moves along the guide hole 72b of the supply-side loading arm 72 and pushes the elastic member 77 placed on the movement path, and thus the force pushing the elastic member 77 is the supply-side loading arm. To the 72 to securely hold the supply side loading arm 72.

At the same time, the intermediate lever 84 in which the cam pin 78 of the function plate 4 is inserted with the locking pin 84a is inserted by the movement operation of the function plate 4 as described above. The loading operation is completed by further turning clockwise to move the winding pole base 88 further.

5 shows the PB mode in which the loading operation of the magnetic tape is completed. In this PB mode, the pinch roller 6 and the tape guide 7 are also completely moved to the tape travel guide position. In particular, the pinch roller 6 Is compressed to the shaft (S) of the capstan motor (M) at a predetermined pressure to enable the running of the tape.

On the other hand, when the STOP mode signal is applied in the PB mode shown in FIG. 5, the motor gear 31 of the capstan motor M rotates in the reverse direction, that is, in the clockwise direction, and thus the cam gear 3 is rotated by a predetermined angle. The function plate 4 is moved in the reverse direction by a predetermined length in the reverse rotation, and the pinch roller 6 is spaced apart from the shaft S of the capstan motor M so that the traveling operation of the magnetic tape is not performed.

At the same time, the engaging portion 64 of the idler stopper 65 pushes the operating portion 68 of the idler stopper 65 as the function plate 4 moves so that the idler stopper 65 has a clockwise rotational force. The idler stopper 65 is rotated by winning the elasticity of the elastic rib 69.

At this time, the idle plate 61 rotated by the rotational force of the capstan motor M has a rotational force in the counterclockwise direction with respect to the shaft pin 33, as shown in FIG. Since the idle engaging portion 61 ′ is caught by the pivoting portion 70 of the idler stopper 65 by the rotation operation, the idle gear 63 is prevented from being caught by the reel gear 10a of the supply reel assembly 10. Will be.

Therefore, the magnetic tape is not forcibly recovered by preventing the reel gear 10a of the supply reel assembly 10 from rotating, and there is no tension applied to the magnetic tape even when it is left in the STOP mode for a long time. Will prevent damage.

As such, when the unloading signal of the magnetic tape is applied in the STOP, the function plate 4 is moved to the right in the drawing by the rotation of the cam gear 3, so that the engaging portion of the function plate 4 from the idler stopper 65 is stopped. 64 is released, and the idler stopper 65 is rotated counterclockwise by the elastic rib 69 to be restored to the initial state, and thus the idle gear (10) to the reel gear 10a of the supply reel assembly 10. 63 is engaged to perform the unloading operation of the magnetic tape.

On the other hand, when returning to the PB mode again in the above-described STOP mode, the idle plate 61 is rotated clockwise so that the idle gear 63 is engaged with the reel gear 20a of the winding reel assembly 20 to release the PB mode. At this time, the function plate 4 is completely moved to the left in the drawing so that the engaging portion 64 of the function plate 4 is released from the idler stopper 65 so that the idler stopper 65 is elastic rib 69. Rotates counterclockwise by to restore the initial state.

7 and 8 show another embodiment of the idler power transmission control apparatus of the magnetic recording and reproduction according to the present invention, and the reciprocating movement is possible along the guide pin 171 fixed to a predetermined portion of the upper surface of the sub chassis 2. Coupled to the idler stopper 172 to restrict movement of the idler plate 61, an elastic member 173 elastically supporting the idler stopper 172 to receive a force in one direction, and interlocked with the function plate 4. It is provided in the supply side brake means 11, and includes the operation part 174 which interlocks the idler stopper 172 in a specific mode.

The idler stopper 172 is formed with a long hole 175 having a predetermined length, the fixing portion 176 is connected to the elastic member 173 is formed on one side, brake reel supplied to the other side A locking portion 177 is formed to interlock with the operating portion 174 of the means 11.

In the drawings, the same reference numerals are given to the same parts as the exemplary embodiments of the present invention.

According to another embodiment according to the present invention configured as described above, when the STOP mode signal is applied in the state of the PB mode, the motor gear 31 of the capstan motor (M) is rotated in the reverse direction, that is clockwise, so The cam gear 3 is rotated backward by a predetermined angle so that the function plate 4 moves to the right in the drawing. The movement of the function plate 4 causes the supply side brake means 11 to clockwise with respect to the center of rotation. As it is rotated, its operating portion 174 pushes the locking portion 177 of the idler stopper 172.

Accordingly, the idler stopper 172 is moved to the right in the drawing while receiving the guide pin 171 fixed on the sub-chassis 2 to overcome the elasticity of the elastic member 173, the idler stopper 172 One side end of the pushing plate 61 ′ of the idle plate 61 restricts rotation of the idle plate 61, thereby preventing the idle gear 63 from engaging with the supply reel assembly 10.

In addition, when the PB mode signal is applied again, the function plate 4 moves to the left in the drawing so that the supply side brake means 11 is restored to an initial state, and the idler stopper is restored by the supply side brake means 11. 172 moves to the initial state by the restoring force of the elastic member 173, and at the same time, the idler plate 61 is subjected to the clockwise rotational force from the center of rotation, so that the rotational force of the idle gear 63 is wound up. 20 is passed.

The idler power transmission control apparatus of the magnetic recording / playback apparatus according to the present invention as described above is not limited to the embodiments described in the detailed description and shown in the drawings. Accordingly, various modifications may be made without departing from the spirit of the inventive concept of the claims of this invention and its dependent claims.

As described above, the idler power transmission control apparatus of the magnetic recording and reproducing apparatus of the present invention prevents the idle gears from being engaged with the feed reel gears in the STOP mode, and thus the tape generated when the deck is left for a long time in the STOP mode. It prevents damage and also prevents noise caused by the bite of the gears of the feed reel gear and the idle gear at the time of switching from the PB mode to the STOP mode.

Claims (4)

The sub-chassis in which the tape cassette is housed in the main chassis is installed to enable linear reciprocating movement in the front-rear direction, and the magnetic recording player is configured such that the rotational force of the driving source is transmitted to the supply reel assembly or the winding reel assembly through the idle gear supported on the idle plate. To Slide means for performing a linear reciprocating motion on the main base according to each mode by the power of the salvage sin, An idler stopper means installed rotatably at a predetermined portion of the sub-chassis and interlocked by a slide means in a specific mode to regulate the rotation of the idle plate; An idler power transmission control device for a magnetic recording and reproducing apparatus, characterized in that it comprises elastic means for elastically supporting the idler stopper means in one direction. 2. An idler power transmission control apparatus according to claim 1, wherein an elastic means is integrally formed in said idler stopper means. The sub-chassis in which the tape cassette is housed in the main chassis is installed to enable linear reciprocating movement in the front-rear direction, and the magnetic recording player is configured such that the rotational force of the driving source is transmitted to the supply reel assembly or the winding reel assembly through the idle gear supported on the idle plate. To Slide means for performing a linear reciprocating motion on the main base according to each mode by the power of the salvage sin, Supply side brake means and interlocked by the slide means for controlling the rotation operation of the supply reel assembly, An idler stopper means coupled to a predetermined portion of the sub chassis so as to be linearly reciprocated and interlocked by the supply side brake means in a specific mode to regulate rotation of the idle plate; An idler power transmission control device for a magnetic recording and reproducing apparatus, characterized in that it comprises elastic means for elastically supporting the idler stopper means in one direction. 4. An idler power transfer control apparatus according to claim 3, wherein said elastic means is a tension coil spring.