KR20060053415A - Reel driving device and magnetic recording and reproducing device having same - Google Patents

Abstract

A reel driving device having a belt tension adjusting unit and a magnetic recording / reproducing device having the same are disclosed. The reel driving device includes a drive unit installed on the first deck, a power transmission unit having a power transmission belt for transmitting the power of the capstan motor to the drive unit, meshing with the drive unit, and selectively transmitting power to a plurality of reel tables according to the rotational direction of the drive unit. It is installed on the pinch roller assembly to be interlocked with the pinch roller assembly operated by the power switching unit and the sliding member sliding on the first deck, and add tension or release tension to the power transmission belt by the operation of the sliding member. It characterized in that it comprises a belt tension adjusting unit. According to the present invention, the pinch roller assembly interlocked with the sliding member has a configuration to adjust the tension of the power transmission belt by pressing the power transmission belt, it is possible to significantly reduce the number of parts compared to the conventional, according to the production cost In addition to the cost savings, productivity can be improved by reducing the number of assembly operations.

Reel, Drive, Belt, Tension, Adjust, Pinch Roller Assembly, Torsion Spring, Swing Lever, Bend

Description

Reel driving device and magnetic recording and reproducing device having it {reel driving apparataus and magnetic recording and reproducing device having the same}

1 is a plan view of a deck mechanism of a magnetic recording and reproducing apparatus having a conventional reel driving apparatus.

FIG. 2 is a partial side cross-sectional view of the deck mechanism of the magnetic recording and reproducing apparatus shown in FIG.

3 is a plan view of a deck mechanism of a magnetic recording and reproducing apparatus having another conventional reel driving apparatus.

4 is a plan view of a deck mechanism of a magnetic recording and reproducing apparatus having a reel driving apparatus according to the present invention;

FIG. 5 is a partial side cross-sectional view of the deck mechanism of the magnetic recording and reproducing apparatus shown in FIG. 4; FIG.

FIG. 6 is a plan view illustrating the operation of the deck mechanism of the magnetic recording and reproducing apparatus shown in FIG. 4; FIG.

7A, 7B, and 7C are partial plan views illustrating the operation of the belt tension adjusting unit of the reel driving device of the deck mechanism shown in FIG.

8A, 8B, and 8C are partial plan views illustrating a modification of the belt tension control unit of the reel drive device according to the present invention.

* Description of the symbols for the main parts of the drawings *                 

100: deck mechanism 102: head drum assembly

105: reel drive unit 106: loading drive unit

108: tape driving guide unit 110: main deck

113: main sliding member 113a: pressing projection

115a, 115b: reel assembly 120: subdeck

130: pinch roller assembly 140: capstan motor

147: loading motor 148: capstan shaft

149: cam gear 150: loading gear train

171: pivot lever 173: pinch roller

175: torsion spring 261: power transmission belt

280, 299: belt tension control unit 285, 299a: bend section

The present invention relates to a magnetic recording and reproducing apparatus such as a video tape recorder (VTR), a camcorder (CAMCORDER), etc. More particularly, a reel driving apparatus for rotating a reel table on which a reel of a tape cassette is seated and a magnetic recording having the same It relates to a playback device.

In general, magnetic recording and reproducing apparatuses such as a video tape recorder, a camcorder, and the like have a reel driving device which rotates the reel of the tape cassette to supply and retrieve the magnetic tape to the head drum. This reel driving device selectively transfers the power of the capstan motor to the supply and winding reel table on which the tape cassette is fed and the reel is mounted, thereby driving the magnetic tape in a forward or reverse direction along a predetermined path.

1 and 2 schematically show a deck mechanism of a magnetic recording and reproducing apparatus having a general reel driving apparatus.

This deck mechanism includes the head drum 11, the feed and reel assembly 12, 13, and the capstan motor 17. The head drum 11 is installed on the deck 10 to record or reproduce video and audio information on a magnetic tape. The feeding and unwinding reel assembly 12, 13 is installed at a lower portion of the deck 10 with a predetermined distance from each other, and has a feed and reeling table 12a, 13a for supplying and winding the reel of the tape cassette. The supply and reel assembly 12, 13 may be installed in a separate deck, not shown, which is installed to be slidably movable relative to the deck 10. The capstan motor 17 is installed near the head drum 11 to transfer power to the supply and reel assemblies 12 and 13, and the capstan shaft 17a for pressing and transferring the magnetic tape together with the pinch roller 18. Have

Between the supply and winding reel assemblies 12 and 13 and the capstan motor 17, a reel driving device 1 for transmitting power of the capstan motor 17 to the supply and winding reel assemblies 12 and 13 is installed.

The reel driving device 1 is a capstan gear 19 connected to the motor gear 17b of the capstan motor 17 and a driven pulley connected to the driving pulley part 19a of the capstan gear 19 by the power transmission belt 16. A drive gear 14 having a portion 14a, and a supply reel gear 12b of the supply reel assembly 12 or a winding reel gear 13b of the winding reel assembly 13 depending on the rotational direction of the drive gear 14; And an idle gear (15) for selectively engaging.

Power of the capstan motor 17 is transmitted to the drive gear 14 through the capstan gear 19 and the power transmission belt 16, the power transmitted to the drive gear 14 is the rotation direction of the drive gear 14 As a result, it is transmitted to the supply reel gear 12b or the winding reel gear 13b through the idle gear 15 pivoting around the drive shaft 21 of the drive gear 14.

However, according to the reel driving device 1 of the deck mechanism configured in this way, the power transmission belt 16 has a structure that is simply connected between the capstan gear 19 and the drive gear 14, for convenience of assembly It is formed slightly longer than the actual length provided between the capstan gear 19 and the drive gear (14). Therefore, the power transmission belt 16 often slips between the drive pulley portion 19a and the driven pulley portion 14a when the power of the capstan motor 17 is transmitted from the capstan gear 19 to the drive gear 14. There was a problem. This slip varies the force or speed transmitted through the power transmission belt 16, and thus, instantaneously changes the rotational speed of the magnetic tape, thereby degrading the picture quality or sound quality recorded or reproduced by the head drum 11.

In order to prevent such a problem, as shown in FIG. 3, the reel driving device 1 ′ configured to install a plurality of tension rollers 20 on the deck 10 to add tension to the power transmission belt 16 during operation. A magnetic recording and reproducing apparatus having a deck mechanism having a) has been proposed.                         

The magnetic recording and reproducing apparatus causes the tension roller 20 to apply a constant tension to the power transmission belt 16 so that the power transmission belt 16 transmits the power of the capstan motor 17 to the driving gear (19). 14) solves the problem of slipping when transmitting to, but as the additional installation of a plurality of tension rollers 20 increases the manufacturing cost, the assembly of the power transmission belt 16 of the capstan gear 19 during assembly Since it has to be inserted between the driving pulley part 19a and the driven pulley part 14a of the drive gear 14 and then put on the tension roller 20 again, the assembling work is cumbersome and there is a problem in that the assembly labor is added.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a reel drive device having a belt tension control unit having a simple structure and manufacture, and a magnetic recording and reproducing device having the same.

In order to achieve the above object, the reel driving device of the magnetic recording and reproducing apparatus according to an embodiment of the present invention is a power transmission unit having a drive unit installed in the first deck, a power transmission belt for transmitting the power of the capstan motor to the drive unit. And a pinch roller assembly interlocked with the drive unit and interlocked with the pinch roller assembly operated by a power switching unit selectively transmitting power to the plurality of reel tables in accordance with the rotational direction of the drive unit, and a sliding member sliding on the first deck. It is installed on, characterized in that it comprises a belt tension control unit for adding tension to the power transmission belt by the operation of the sliding member or release the tension.                     

Here, the pinch roller assembly is rotatably installed in the first technology, and interlocked with the second deck installed slidably with respect to the first deck to rotate to the capstan shaft of the capstan motor so as to be rotatable at one end of the pivot lever. And a pinch roller which is contacted or spaced from the capstan shaft by the pivot lever, and a torsion spring which is actuated to press the pivot lever toward the capstan shaft by the sliding member.

In addition, the belt tension adjusting unit is composed of a bent portion formed in the torsion spring or the rotation lever to pressurize the power transmission belt to add tension when the sliding member operates the torsion spring to compress the tape to the capstan shaft.

According to another aspect of the present invention, there is provided a magnetic recording / playback apparatus comprising: a capstan motor provided on a first deck; A pinch roller assembly installed on the first deck, the pinch roller assembly in close contact with or spaced from the capstan shaft of the capstan motor; A plurality of reel tables installed on a second deck slidably mounted to the first deck, and having a tape reel of the tape cassette seated thereon; And a power transmission unit installed on the first deck between the reel tables and driven by the power of the capstan motor, and a power transmission belt for transmitting the power of the capstan motor to the driving unit. It is installed on the pinch roller assembly to be interlocked with the pinch roller assembly operated by the power switching unit for selectively transmitting power to the plurality of reel table, and the sliding member sliding on the first deck, the power by the operation of the sliding member It characterized in that it comprises a; reel drive unit having a belt tension control unit for adding tension to the transfer belt or release the tension.

Here, the pinch roller assembly is rotatably installed in the first technology, the rotation lever pivotally connected to the capstan shaft of the capstan motor in conjunction with the second deck, rotatably installed at one end of the rotation lever, and the capstan shaft by the rotation lever And a torsion spring that is contacted or spaced apart, and is operated to press the pivot lever toward the capstan shaft by the sliding member. At this time, the belt tension control unit may be composed of a bent portion formed in the torsion spring or the rotation lever to pressurize the power transmission belt to add tension when the sliding member operates the torsion spring to compress the tape to the capstan shaft.

Hereinafter, a reel driving device and a magnetic recording / reproducing device having the same according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

4 and 5 show a deck mechanism 100 of a camcorder to which a reel driving device according to a preferred embodiment of the present invention is applied.

The deck mechanism 100 includes a deck plate 101, a tape driving guide unit 108 for guiding a magnetic tape traveling on the deck plate 101, and a tape driving guide unit 108 for loading / unloading magnetic tape. A reel driving device according to the present invention for driving a magnetic tape by rotating a loading driving unit 106 for moving each component to a predetermined position, and supplying and winding a reel (not shown) of a tape cassette (not shown). It comprises a reel driving unit 105 constituting.

Deck plate 101 is composed of a main deck (110), and a sub deck (120) slidably installed on the main deck (110).

The main deck 110 has a head drum assembly 102 in the center of one side.

The head drum assembly 102 scans a magnetic tape to fix the head drum 111 having a magnetic head for recording / reproducing video and audio information on the magnetic tape, and to fix the head drum 111 to the main deck 110. It has a drum base 112 installed inclined so as to have a constant inclination.

The sub deck 120 is installed to reciprocally slide in the direction of the arrow B1 or B2 with respect to the main deck 110. Sub-deck 120 is a protrusion pin formed on the cam gear 149 of the loading gear train 150 made of a plurality of gears operated by receiving the power of the loading motor 147 of the loading driving unit 106 to be described later (not shown) And a cam groove (not shown) formed in the sub deck 120. Since the protruding pins and the cam grooves are known in the art, detailed descriptions thereof will be omitted.

In addition, the sub deck 120, the supply and reel assembly (115a, 115b) is provided with a predetermined interval from each other. The supply and winding reel assemblies 115a and 115b respectively serve to rotationally drive the supply and winding reel tables 121 and 131 on which the supply and winding reel of the tape cassette is seated, and the supply and winding reel tables 121 and 131, respectively. Supply and reel gears 123 and 133 rotatably supported on the first and second pivot shafts 125 and 135 fixed to the deck 120 are provided.

The loading driving unit 106 includes a loading motor 147 installed on the main deck 110, and a main sliding member 113 installed to slide on the main deck 110.

The main sliding member 113 is for compressing or decompressing the torsion spring 175 of the pinch roller assembly 130, which will be described later, when the magnetic tape is loaded / unloaded, and the cam gear of the loading gear train 150 In conjunction with (149), it reciprocates in the direction of the arrow A1 or A2. That is, the guide pin 113b of the main sliding member 113 is interlocked with the cam groove 149a formed in the cam gear 149 to move in the direction of the arrow A1 or A2.

The tape driving guide unit 108 has a feed reel side and a reel side tape guide device 108a having a plurality of rollers and a fixed pole member for guiding the magnetic tape to be wound onto the head drum 111 when the magnetic tape is loaded / unloaded. 108b).

The supply reel side tape guide device 108a includes a tension pole assembly (not shown) and a first pole base assembly 116.

      Tension pole assembly is a tension arm (not shown) installed on the sub-deck 120 to be rotated in a predetermined trajectory in the main deck 110 in accordance with the movement of the sub-decks 120 when loading and unloading the magnetic tape, tension arm It consists of a first tension pole (not shown), which is formed to project upright to the front end of the fixed pole (not shown) fixed to the main deck (110). Since the configuration of the tension pole assembly is generally the same as the known configuration, a detailed description thereof will be omitted.

The first pole base assembly 116 guides the magnetic tape to be wound onto the head drum 111 from the tape cassette when the sub deck 120 is loaded. The first pole base 116a and the first slot pole 116b are provided to guide the magnetic tape to the head drum 111. ), And a first guide roller 116c. The first pole base 116a is the first guide groove of the guide rail 107 when the magnetic tape T is loaded / unloaded by the loading gear train 150 driven by the power from the loading motor 147. Sliding along 114). The first slant pole 116b is formed to protrude obliquely on the first pole base 116a. The first guide roller 116c regulates the vertical flow of the magnetic tape entering the first slot pole 116b.

The winding reel-side tape guide device 108b includes a second pole base assembly 117 and a pinch roller assembly 130.

The second pole base assembly 117 has the same configuration as the first pole base assembly 116 except that the second pole base assembly 117 is disposed symmetrically with the first pole base assembly 116.

That is, the second pole base assembly 117 is the second pole base 117a, the second pole base (slidably moved along the second guide groove 115 of the guide rail 107 when the magnetic tape is loaded / unloaded) The second slant pole 117b protruding obliquely on the 117a, and the second guide roller 117c for regulating the up and down flow of the magnetic tape entering the second slant pole 117b.

The pinch roller assembly 130 includes a pivot lever 171 rotatably installed on the main deck 110, a pinch roller 173 rotatably installed at an end of the pivot lever 171, and a pivot lever 171. It has a torsion spring 175 coupled coaxially to it.

Rotating lever 171 is one end is rotatably installed on the main deck (110). A pinch roller 173 is installed at the end of the rotation lever 171. The rotation lever 171 is provided with locking projections 171a and 171b for supporting both ends of the torsion spring 175.

The pinch roller 173 contacts the capstan shaft 148 of the capstan motor 140 installed in the main deck 110 when the sub deck 120 is loaded to guide the transfer of the magnetic tape.

The torsion spring 175 is installed coaxially to be wound around the rotational center axis of the rotation lever 171. The first and second ends 175a and 175b of the torsion spring 175 are supported by the locking protrusions 171a and 171b, respectively, to prevent loosening. The second end 175b of the torsion spring 175 has a bent portion 285 bent downward at the end. When the sub-deck 120 is loaded, when the pivoting lever 171 rotates by the contact protrusion 171c protruding from the pivoting lever 171 to contact the sub-deck 120, a solid line is shown in FIGS. 4 and 5. As shown, the bent portion 285 does not collide with the pressurized protrusion 113a without the pressing protrusion 113a formed on the main sliding member 113 in the rotation path of the bent portion 285. In FIGS. 4, 5, and 7a, it may move to an engagement position (dashed line of FIG. 5, FIGS. 6 and 7b) engaged with the pressing protrusion 113a. In this engagement position, the bent portion 285 is pushed by the pressing projection 113a of the main sliding member 113 sliding in the direction of the arrow A1 while being compressed and capsulated the rotation lever 171 through the torsion spring 175. It is moved to the pressing position (dashed line of FIG. 6 and FIG. 7C) which pushes toward the shaft 148. At this time, the bent portion 285 to the torsion spring to be in a position to add a constant tension to the power transmission belt 261 in order to serve as the belt tension control unit 280 of the reel driving unit 105 to be described later ( It is formed to extend further toward the power transmission belt 261 at the second end 175b of the 175. Therefore, when the bent portion 285 is pushed by the pressing protrusion 113a at the engaged position, the pinch roller 173 is pressed against the capstan shaft 148 by the torsion spring 175 and the rotation lever 171. And the power transmission belt 261 may be maintained in a pressurized state with a constant tension.

When the pressing force of the pressing protrusion 113a of the main sliding member 113 acting on the bent portion 285 is released, in order to win-position the rotating lever 171 and the torsion spring 175, the rotating lever 171 The return spring 174 is formed on the rotating shaft. The return spring 174 is once fixed to the main deck 110 and the other end is fixed to a hook (not shown) formed on the rotation lever 171.

The reel drive unit 105 is installed between the supply and reel assembly 115a and 115b and the capstan motor 140.

The reel driving unit 105 transmits power of the capstan motor 140 to the reel assembly 115a and 115b to rotate the supply and reel of the tape cassette to drive the magnetic tape, and the driving unit 240. , A power transmission unit 260, a power switching unit 249, and a belt tension control unit 280.

The drive unit 240 is composed of a drive gear 241 provided between the supply and reel assembly (115a, 115b). As shown in detail in FIG. 5, the drive gear 241 includes a large-diameter driven pulley 245 disposed below, and a small-diameter first gear 242 arranged above. The drive gear 241 is rotatably supported by the drive shaft 210 fixed to the main deck 110.

The power transmission unit 260 is disposed on the main deck 110 and transmits the power of the motor gear 153 of the capstan motor 140 to the driven pulley unit 245 of the drive gear 241 of the driving unit 240. The capstan gear 290 including the second gear portion 295 and the driving pulley portion 291 connected to the motor gear 153 of the capstan motor 140, and the driving pulley portion 291 of the capstan gear 290. ) And a power transmission belt 261 connecting the driven pulley portion 245 of the drive gear 241. The capstan gear 290 is rotatably supported by the third rotation shaft 296 fixed to the main deck 110 near the capstan motor 140.                     

The power switching unit 249 supports the idle gear 250 and the idle gear 250 in engagement with the first gear portion 242 of the drive gear 241, and supports the idle gear 250 with respect to the drive shaft 210. It consists of an idle plate 255 for pivoting.

The idle plate 255 pivots the idle gear 250 clockwise or counterclockwise according to the rotational direction of the drive gear 241 to supply the idle gear 250 to the feed reel gear 123 of the reel assembly 115a. Or it is selectively connected to the winding reel gear 133 of the winding reel assembly 115b.

The belt tension adjusting unit 280 includes a bent portion 285 formed at the end of the second end 175a of the torsion spring 175 of the pinch roller assembly 130.

As mentioned above, when the bent portion 285 is compressed by being pushed by the pressing protrusion 113a of the main sliding member 113 in the engagement position (solid line in FIG. 6, dotted line in FIG. 5, and FIG. 7B), power transmission is performed. The belt 261 is formed to extend toward the power transmission belt 261 so as to be positioned at a pressurized position (dotted line of FIG. 6 and FIG. 7C) to which a constant tension can be applied. Therefore, when the bent portion 285 is pressed to the pressing position (dashed line in FIG. 6 and FIG. 7C) by the pressing projection 113a, the power transmission belt 261 is pressed by the bending portion 285 to a constant tension. In this state, deterioration of recording quality or reproduction quality due to slip of the power transmission belt 261 generated between the capstan gear 290 and the drive gear 241 is prevented.

Further, the bent portion 285 is decompressed by the pressing protrusion 113a of the main sliding member 113 to move to the engaged position (solid line in FIG. 6, dashed line in FIG. 5, and FIG. 7B) or the sub deck ( The tension added to the power transmission belt 261 is released when moving to the initial standby position (solid line of FIGS. 4, 5, and 7a) by the unloading of 120.

As such, the reel driving unit 105 of the present invention can configure the belt tension control unit 280 to adjust the tension of the power transmission belt 261 without greatly modifying the configuration of the pinch roller assembly 130, Installation of the belt tension control unit 280 does not require an additional assembly process or increase the manufacturing cost.

In the above, the reel driving unit 105 of the present invention is composed of a bent portion 285 is formed in the belt tension adjusting unit 280 is formed on the second end 175b of the torsion spring 175 of the pinch roller assembly 130. Although illustrated and described, the present invention is not limited to this, but other forms that may add a constant tension to the power transmission belt 261, for example, as shown in Figure 8a to 8c, pinch roller assembly It may also be configured as a belt tension control unit 299 having a bending portion 299a extending from the pivoting lever 171 of 130 and the end is bent downward. The bent portion 299a of the belt tension control unit 299 is compressed by being pushed by the pressing protrusion 113a of the main sliding member 113 at the bent portion 285 of the torsion spring 175 in the engaged position (Fig. 8B). At this time, the power transmission belt 261 is formed to extend toward the power transmission belt 261 so as to be in a pressurized position (Fig. 8C) capable of adding a constant tension. Therefore, at this time, the power transmission belt 261 is maintained in a pressurized state with a constant tension, and thus recording quality due to slip of the power transmission belt 261 generated between the capstan gear 290 and the drive gear 241. Or quality deterioration of reproduction quality is prevented. In addition, the bent portion 299a has the initial standby position (when the bent portion 285 is decompressed by the pressing protrusion 113a and moved to the engaged position (FIG. 8B) or by the unloading of the sub deck 120 ( 8A), the tension added to the power transmission belt 261 is released.

In addition, although the deck mechanism 100 of the magnetic recording and reproducing apparatus provided with the reel driving unit 105 of the present invention has been described taking the case of a camcorder as an example, the present invention is not limited thereto, and a video tape recorder and a digital audio tape are described. It may be applied to a magnetic recording / playback apparatus having a deck mechanism such as a recorder.

The loading operation of the deck mechanism 100 of the magnetic recording and reproducing apparatus provided with the reel driving unit 105 of the present invention described above will be described in detail with reference to FIGS. 4 to 7C.

First, in the state shown in FIG. 4, after the tape cassette is seated on the sub deck 120, and when the loading motor 147 is driven, the sub deck 120 is driven by the loading motor 147. By the protruding pin of the cam gear 149 and the cam groove of the sub-deck 120, which is interlocked with the 150, it moves in the direction of the arrow B1, that is, the head drum 111. At this time, the sub deck 120 is in contact with the contact projection 171c protruding from the rotation lever 171, and moves while pushing the rotation lever 171. At the same time, the main sliding member 113 is guided by the cam groove 149a of the cam gear 149 to be moved a predetermined distance in the direction of the arrow A1.

In the state where the main sliding member 113 is moved a predetermined distance to the position shown in FIG. 4, the pressing protrusion 113a of the main sliding member 113 is not on the rotation path of the bent portion 285 of the torsion spring 175. Therefore, the bent portion 285 does not collide with the pressing protrusion 113a and is moved from the initial standby position (solid line in FIGS. 4 and 5 and 7A) to the engaged position (dashed line in FIG. 5 and solid line in FIG. 6 and FIG. 7B). Move.                     

In addition, when the loading motor 147 is driven, the magnetic tape is tension tension, first and second guide rollers 116c and 117c and first and second slant poles which are operated by a known driving mechanism (not shown). It draws out to the head drum 111 side by 116b, 117b.

Thereafter, when the loading of the sub deck 120 is completed, the bent portion 285 of the torsion spring 175 is located at the fully engaged position (dotted line in FIG. 5, solid line in FIG. 6, and FIG. 7B), and the pinch roller 173. Contacts the capstan shaft 148 of the capstan motor 140 with the magnetic tape interposed therebetween. In this state, the cam gear 149 is further driven to rotate. As a result, the guide pin 113b of the main sliding member 113 is guided along the cam groove 149a, and the main sliding member 113 moves in the direction of the arrow A1, that is, in the left direction on the drawing, and the pressing protrusion 113a. ) Is in the stop mode contacting the bent portion 285 of the torsion spring 175.

While waiting in this state, the cam gear 149 is further driven to rotate in the record (REC) mode or the play (PLAY) mode. Then, the guide pin 113b of the main sliding member 113 is guided to the end of the cam groove 149a, so that the main sliding member 113 is completely moved to the end of the arrow A1 direction.

At this time, the pressing protrusion 113a presses the bent portion 285 in the direction of the arrow A1 to move to the pressing position (dotted line of FIG. 6, FIG. 7C). Therefore, the torsion spring 175 is compressed, and the torsion force is transmitted to the rotation lever 171. Therefore, the pinch roller 173 is kept pressed against the capstan shaft 148, and can smoothly guide the transfer of the magnetic tape passing therebetween.

Further, when the pressing projection 113a presses and moves the bent portion 285 in the direction of the arrow A1, the bent portion 285 pushes the power transmission belt 261, and as a result, the power transmission belt 261 Can be kept pressed under constant tension.

In this state, the capstan motor 140 is driven in one direction, for example counterclockwise. As a result, the power of the capstan motor 140 is transmitted to the drive gear 241 through the motor gear 153, the capstan gear 290, and the power transmission belt 261, and the drive gear 241 is clockwise. Is rotated.

As the drive gear 241 rotates in the clockwise direction, the idler gear 250 supported to engage the first gear portion 242 of the drive gear 241 by the idle plate 255 rotates in the counterclockwise direction. Rotate clockwise about the drive shaft 210.

As a result, as shown in FIG. 6, the idler gear 250 meshes with the winding reel gear 133 of the winding reel assembly 115b, and the winding is connected with the winding reel gear 133 and the winding reel gear 133. The reel table 131 rotates clockwise.

Therefore, the magnetic tape is wound by the power of the capstan motor 140 to be wound from the feed reel of the tape cassette while being compressed between the pinch roller 173 and the capstan shaft 148.

The REVIEW mode operation is the same as the recording mode or reproduction mode operation except that the capstan motor 140 is driven in the opposite direction to the recording mode or reproduction mode operation, that is, clockwise. In addition, in the fast forward (FF) mode or the rewind (REWIND) mode operation, the capstan motor 140 operates clockwise or counterclockwise while the main sliding member 113 is in the stop mode.                     

The unloading operation of the deck mechanism 100 of the magnetic recording / playback apparatus proceeds in the reverse order of the loading operation.

As described above, the reel driving device and the magnetic recording and reproducing device having the same according to the present invention have a torsion spring or a bent portion of the revolving lever of the pinch roller assembly interlocked with the main sliding member slidingly moved onto the main deck. By pressurizing the power transmission belt to control the tension of the power transmission belt, the number of parts can be significantly reduced compared to the conventional one, and accordingly, the manufacturing cost is reduced, and the assembly labor is reduced, thereby improving productivity. To provide.

 In the above, certain preferred embodiments of the present invention have been illustrated and described. However, the present invention is not limited to the above-described embodiments, and any person having ordinary skill in the art to which the present invention pertains without departing from the spirit and spirit of the present invention as claimed in the claims may have various modifications and Modifications may be made.

Claims (5)

A driving unit installed on the first deck; A power transmission unit having a power transmission belt for transmitting power of the capstan motor to the driving unit; A power switching unit which meshes with the driving unit and selectively transmits power to a plurality of reel tables according to the rotational direction of the driving unit; And Belt tension control is installed on the pinch roller assembly to be interlocked with the pinch roller assembly which is operated by the sliding member sliding on the first deck, the belt tension control to add or release tension to the power transmission belt by the operation of the sliding member. A reel driving device of a magnetic recording and reproducing apparatus, comprising: a unit. According to claim 1, The pinch roller assembly, A rotatable lever rotatably installed on the first tech and interlocked with a second deck installed slidably with respect to the first deck to pivot toward the capstan shaft of the capstan motor; A pinch roller rotatably installed at one end of the pivot lever and contacted or spaced from the capstan shaft by the pivot lever; And And a torsion spring which is operative to press the pivot lever toward the capstan shaft by the sliding member. According to claim 2, wherein the belt tension adjustment portion of the torsion spring and the rotation lever to add tension by pressing the power transmission belt when the torsion spring presses the rotation lever toward the capstan shaft by the sliding member. A reel driving device of a magnetic recording and reproducing apparatus, comprising a bent portion formed at one place. A capstan motor installed on the first deck; A pinch roller assembly installed on the first deck, the pinch roller assembly in close contact with or spaced from the capstan shaft of the capstan motor; A plurality of reel tables installed on a second deck slidably mounted to the first deck, and having a tape reel of the tape cassette seated thereon; A power transmission unit provided with a driving unit installed on the first deck between the reel tables, a power transmission belt for transmitting the power of the capstan motor to the driving unit, the plurality of reels in engagement with the driving unit and in accordance with a rotational direction of the driving unit; It is installed on the pinch roller assembly to be interlocked with the pinch roller assembly operated by the power switching unit for selectively transmitting power to the table, and the sliding member sliding on the first deck, by the operation of the sliding member And a reel driving unit having a belt tension control unit for adding tension to the power transmission belt or releasing the tension. The method of claim 4, wherein The pinch roller assembly is rotatably installed in the first technology, the pivot lever pivotally connected to the capstan shaft in conjunction with the second deck, rotatably installed at one end of the pivot lever, the capstan by the pivot lever A pinch roller contacting or spaced from the shaft, and a torsion spring operative to press the pivot lever toward the capstan shaft by the sliding member; The belt tension control unit includes a bent portion formed at one of the torsion spring and the rotation lever to pressurize the power transmission belt to add tension when the torsion spring presses the rotation lever toward the capstan shaft by the sliding member. Magnetic recording and reproducing apparatus, characterized in that.

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