JPH09198745A - Capstan motor assembly for video cassette recorder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively drive a reel base. SOLUTION: This capstan motor assembly 200 is equipped with a capstan motor in a base bottom part, a timing belt 230 to connect 1st and 2nd timing gears 220 and 240 to each other and a tension device 300 for imparting tension force to this belt. The tension device is equipped with a U-shaped frame 310 separated from the timing belt, 1st and 2nd connecting rods 320 and 322 hinged to upper and lower inner-side wall surfaces of this frame and extended to the position of the timing belt, a roller installed between these connecting rods and rotatably brought into contact with the timing belt and springs for energizing this roller to the timing belt. Since the tension device is for the purpose of applying pressure to the timing belt and firmly meshing the timing belt with both these gears, driving force of the capstan motor is effectively transmitted to a feed reel base and a take-up reel base.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video cassette recorder, and more particularly to a capstan motor assembly for a video cassette recorder which can effectively drive a reel stand.

[0002]

2. Description of the Related Art In general, a video cassette tape recorder is an apparatus for recording video and / or audio signals on a magnetic tape running along a tape running system and reproducing the recorded signals. The magnetic tape is wound on a pair of reels provided in the cassette, and when the cassette is mounted on the deck of the tape recorder by the cassette loading mechanism, the pair of reels is provided with a take-up reel stand and a take-up reel stand. Respectively engage with. Then, the take-up reel table and the take-up reel table are rotated by a capstan motor to perform a predetermined traveling operation such as reproduction, recording, fast-forwarding, and rewinding. Depending on the rotation direction of the take-up reel stand, the reel is unwound from one reel and wound on the other reel.

FIG. 4 shows a conventional video cassette recorder 50.
It is a perspective view which shows the internal structure of 0. As shown in FIG.
The conventional video cassette recorder 500 includes a base 510. In the front of the upper surface of the base 510, a reel reel and a reel reel of the cassette are mounted and stably positioned, and a reel reel holder 512 and a reel reel holder 5 are provided.
14 are installed side by side at regular intervals. The feeding reel stand 512 and the take-up reel stand 514
First and second gears 522 and 524 are integrally formed in the lower portion of the. A head drum 505 installed at a predetermined angle behind the upper surface of the base 510, and a mode control motor assembly 50 for controlling the functional modes of the video cassette recorder 500.
7 are provided. On the other hand, the capstan motor 520 for driving the delivery reel table 512 and the take-up reel table 514 is installed at the bottom of the base 510.

The capstan motor 52 is provided between the feeding reel table 512 and the take-up reel table 514.
An idler assembly 516 is installed that selectively rotates the delivery reel base 512 and the take-up reel base 514 while moving to the left and right according to the rotation direction of 0. The idler assembly 516 is pivotally coupled to a central gear 552 mounted on the upper surface of the base 510. A friction gear 550 having a predetermined torque is coaxially arranged below the central gear 552.

A first pulley 533 is integrally formed on the capstan motor 520. The first
The pulley 533 is connected to the second pulley 540, which is installed at a predetermined distance from the first pulley 533, by a belt 535. A gear part 545 that engages with the first intermediate gear 518 that engages with the friction gear 550 is provided on the second pulley 540.

[0006] The driving force of the capstan motor 520 is transmitted to the take-up reel stand 512 and the take-up reel stand 514 through the idler assembly 516 so that the idler assembly 516 and the take-up reel stand 512 can be moved to a first position. The second and third intermediate gears 532 and 534 engaging with each other are interposed between the first gear 522 and
The idler assembly 516 and the take-up reel stand 51
And the fourth gear 524 of the fourth
And fifth intermediate gears 542 and 544 are interposed.

The driving mechanism of the conventional video cassette recorder 500 having such a structure is as follows. When the capstan motor 520 rotates in the forward direction, the driving force of the capstan motor 520 in the forward direction is generated by the first and second pulleys 533 and 540, the first intermediate gear 518, and the friction gear 550. Through the friction gear 5
50 is transmitted to the central gear 552 formed on the upper part of the gear 50, whereby the idler assembly 516 moves toward the take-up reel stand 514 and the fourth intermediate gear 54
Engage with 2. Therefore, the second gear 524 integrally provided on the lower portion of the take-up reel stand 514 is driven through the fourth and fifth intermediate gears 542 and 544, and is thereby wound around the reel of the cassette. The magnetic tape 501 moves along the tape running path and is taken up by the take-up reel of the cassette.

On the other hand, when the capstan motor 520 rotates in the reverse direction, the driving force of the capstan motor 520 in the reverse direction is generated by the first and second pulleys 53.
3, 540, the first intermediate gear 518, and the friction gear 55
0 through a central gear 552 formed above the friction gear 550, whereby the idler assembly 516 moves toward the delivery reel base 512 and engages with the third intermediate gear 534. Therefore, the first gear 522, which is integrally provided on the lower portion of the payout reel base 512, is replaced with the second and third intermediate gears 532, 5.
The magnetic tape 501 wound around the take-up reel of the cassette is moved to the take-up reel side of the cassette and taken up by the take-up reel.

However, in the conventional video cassette recorder 500 having such a structure, since the belt 535 for connecting the first pulley 533 and the second pulley 540 of the capstan motor 520 is generally made of rubber. ,
When the video cassette recorder 500 is used for a long period of time, the belt 535 is slackened so that the driving force of the capstan motor 520 cannot be reliably transmitted to the reel stand, or the belt 535 is hardened and cut. Have a

When a foreign matter such as dust is present on the belt 535, the belt 535 is moved to the pulley 53.
Can slip on 3,540. In such a case, the frictional force between the belt 535 and the pulleys 533 and 540 is reduced, and the driving efficiency of the capstan motor 520 is reduced.

[0011]

SUMMARY OF THE INVENTION The present invention is to solve the above-mentioned problems of the prior art. The technical object of the present invention is to provide a video cassette recorder for effectively driving a reel stand. The present invention provides a capstan motor assembly.

[0012]

The present invention for achieving the above object provides a capstan motor assembly for a video cassette recorder, which comprises a base on which a take-up reel stand and a pay-off reel stand are mounted. A capstan motor attached to the bottom of the base, which rotates in both forward and reverse directions to drive the delivery reel base and the take-up reel base, and a first timing gear integrally formed on the top of the capstan motor. A second timing gear that is installed at a first predetermined distance from the first timing gear, a timing belt that connects the first and second timing gears to each other, and Capstan mower for a videocassette recorder, characterized in that it comprises a first means for applying tension. To provide the assembly.

According to a preferred embodiment of the present invention, the first means is a frame fixed to the bottom of the base at a second predetermined distance from the timing belt,
A first predetermined distance spaced from each other by a third predetermined distance, a first end of which is coupled to an upper portion of the frame and a second end of which is extended to a position of the timing belt.
And a second connecting rod, second means installed between the first and second connecting rods and rotatably engaged with the timing belt, and the second means with respect to the timing belt. Third to urge
Including means.

The second means includes a cylindrical roller having an engaging portion which is rotatably engaged with the timing belt.

Further, the third means includes first and second tension springs. The first tension spring is connected between a second end of the first connecting rod and a first lower front portion of the frame, and the second tension spring is connected to the second tension spring. A second end of the connecting rod is connected to a second position at a lower front portion of the frame.

The driving mechanism of the video cassette recorder having the capstan motor assembly according to the present invention having the above structure operates as follows. When the capstan motor rotates in the forward direction, the driving force of the capstan motor in the forward direction is transmitted to the second timing gear through the first timing gear and the timing belt. At this time, the cylindrical roller ensures a strong mesh between the timing belt and the first and second timing bells in order to apply a predetermined pressure to the timing belt. Therefore, the driving efficiency of the capstan motor is improved.

Then, the driving force of the capstan motor is transmitted to an idler assembly mounted between the take-up reel base and the pay-out reel through a plurality of intermediate gears. As a result, the idler assembly moves toward the take-up reel stand and transmits the driving force of the capstan motor to the take-up reel stand. Therefore, the magnetic tape wound on the delivery reel of the cassette moves along the tape running path and is wound on the winding reel of the cassette.

On the other hand, when the capstan motor rotates in the reverse direction, the idler assembly moves toward the delivery reel base and transmits the driving force of the capstan motor to the delivery reel base. Therefore, the magnetic tape wound on the take-up reel of the cassette is taken up by the take-up reel of the cassette.

As described above, in the video cassette recorder equipped with the capstan motor assembly according to the present invention, pressure is applied to the timing belt during the operation of the driving mechanism, and the timing belt and the timing belt are combined with each other. By enabling strong engagement with the first and second timing gears, the driving force of the capstan motor is effectively transmitted to the delivery reel base and the take-up reel base.

Also, the video cassette recorder equipped with the capstan motor assembly according to the present invention is made of rubber because the driving force of the capstan motor is transmitted to the feed reel table and the take-up reel table through the timing belt. It has an advantage that the driving efficiency is improved as compared with the conventional video cassette recorder equipped with a belt.

The above-mentioned objects of the present invention, other features and advantages thereof will become clear from the following description of some preferred embodiments of the present invention to which reference is made next.

[0022]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. FIG. 1 illustrates a capstan motor assembly 200 according to an exemplary embodiment of the present invention.
FIG. 3 is a perspective view showing the internal structure of a video cassette recorder 100 equipped with. As shown in FIG. 1, the video cassette recorder 100 includes a base 110. In the front of the upper surface of the base 110, a reel reel and a reel reel of the cassette are mounted, and a reel reel stand 112 and a reel reel stand 114, which are stably positioned, are installed side by side at a constant interval. . First and second gears 122 and 124 are integrally formed on the lower portions of the feeding reel table 112 and the take-up reel table 114, respectively. At the rear of the upper surface of the base 110,
The head drum 105 installed at a predetermined angle.
And a mode control motor assembly 107 for controlling the functional modes of the video cassette recorder 100. On the other hand, the capstan motor assembly 200 for driving the feeding reel table 112 and the take-up reel table 114 is installed at the bottom of the base 110.

Referring to FIG. 2, the capstan motor assembly 200 includes a capstan motor 210 that rotates in either forward or reverse directions depending on an operation mode, and a first capstan motor 210 integrally formed on the capstan motor 210. A timing gear 220, a second timing gear 240 installed at a predetermined distance from the first timing gear 220, the first and second timing gears 220, 2
A timing belt 230 connecting the 40 to each other, and a tension device 300 for applying tension to the timing belt 230.

As is known, the timing belt 23
On the inner surface of 0, the first and second timing belts 2
A number of teeth are formed to engage 20,240.

FIG. 3 shows a contact state between the tension device 300 and the timing belt 230. As shown in FIG. 3, the tension device 300 includes a frame 310 fixed to the bottom of the base 110 at a predetermined distance from the timing belt 230.
In a preferred embodiment of the present invention, the frame 31
Reference numeral 0 has a substantially U shape, and one side wall thereof is fixed to the bottom portion of the base 110 by welding or the like.

The tension devices 300 are separated from each other by a predetermined distance, and are hinged to the upper and lower inner wall surfaces of the U-shaped frame 310, respectively, and first and second connecting rods 320 and 322, the first and second connecting rods 320 and 322, respectively. Installed between the second connecting rods 320, 322,
The system further includes a cylindrical roller 330 rotatably coupled to the timing belt 230, and first and second tension springs 324 and 326 for biasing the cylindrical roller 330 against the timing belt 230. .

The first ends of the first and second connecting rods 320 and 322 are attached to the upper and lower inner wall surfaces of the U-shaped frame 310 by a pair of first connecting pins 312, respectively. The second end portion extends to the position of the timing belt 230, and is connected to both end walls of the cylindrical roller 330 by a pair of second connecting pins 334, respectively.

The cylindrical roller 330 has a contact portion 33 rotatably contacting the timing belt 230 in order to stably drive the timing belt 230.
2 are formed. In another embodiment of the present invention, a spherical roller may be used instead of the cylindrical roller 330.

The first and second tension springs 324, 3
26 is disposed between the second ends of the first and second connecting rods 320 and 322, respectively, and the lower front portion of the U-shaped frame 310, and is fixed to the position by welding or the like. Due to the deflection force of the first and second tension springs 324, 326, the cylindrical roller 33
0 can apply a predetermined pressure to the timing belt 230. Therefore, even when it is used for a long period of time, the timing belt 230 maintains a strong mesh with the first and second timing gears 220 and 240, so that the driving force of the capstan motor 210 is increased. Effectively transmitted to the table 112 and the take-up reel table 114.

Further, referring to FIG. 1, between the feeding reel base 112 and the take-up reel base 114, the feeding reel base 112 and the take-up reel are moved while moving left and right depending on the rotation direction of the capstan motor 210. Idler assembly 11 for selectively rotating the base 114
6 is installed. The idler assembly 116 is pivotally coupled to a central gear 152 mounted on the upper surface of the base 110. A friction gear 150 having a predetermined torque is coaxially arranged below the central gear 152. A third gear 145, which engages with the first intermediate gear 118 engaged with the friction gear 150, is provided on the second timing gear 240.

The drive force of the capstan motor 210 is transmitted to the take-up reel stand 112 and the take-up reel stand 114 through the idler assembly 116 so that the idler assembly 116 and the take-up reel stand 112 can be driven. The second and third intermediate gears 132 and 134, which are engaged with each other, are interposed between the first gear 122 and the first gear 122,
The idler assembly 116 and the take-up reel stand 11
And a second gear 124 of the fourth
Also, the fifth intermediate gears 142 and 144 are interposed.

The driving mechanism of the video cassette recorder 100 having the capstan motor assembly 200 according to the present invention having the above structure is as follows. When the capstan motor 210 rotates in the forward direction, the driving force of the capstan motor 210 in the forward direction is transmitted to the second timing gear 240 through the first timing gear 220 and the timing belt 230. To be done. At this time, since the timing belt 230 is guided by the contact portion 332 of the cylindrical roller 330, the timing belt 230 is prevented from being separated from the first and second timing gears 220 and 240. Also, since the cylindrical roller 330 applies a predetermined pressure to the timing belt 230, a strong meshing between the timing belt 230 and the first and second timing gears 220 and 240 is ensured. .
Therefore, the driving efficiency of the capstan motor 210 is improved.

Then, the driving force of the capstan motor 210 passes through the third gear 145, the first intermediate gear 118, and the friction gear 150 provided above the second timing gear 240, and the friction gear 150. Is transmitted to a central gear 152 formed on the upper part of the idler assembly 116, whereby the idler assembly 116 moves toward the take-up reel stand 114 and engages with the fourth intermediate gear 142. Therefore, the second gear 124, which is integrally provided on the lower portion of the take-up reel stand 114, is used as the fourth and fifth intermediate gears 14.
The magnetic tape 101, which is wound around the delivery reel of the cassette, moves along the tape running path and is wound onto the take-up reel of the cassette.

On the other hand, when the capstan motor 210 rotates in the reverse direction, the driving force of the capstan motor 210 in the reverse direction is the same as when the capstan motor 210 rotates in the forward direction.
It is transmitted through the first and second timing gears 220 and 240, the first intermediate gear 118, and the friction gear 150 to the central gear 152 formed on the friction gear 150. At this time, since the capstan motor 210 rotates in the opposite direction, the idler assembly 116 moves toward the payout reel base 112 and engages with the third intermediate gear 134. Therefore, the first gear 122, which is integrally provided on the lower portion of the payout reel base 112, is driven through the second and third intermediate gears 132 and 134, whereby the first gear 122 is wound around the take-up reel of the cassette. The magnetic tape 101 moves to the delivery reel side of the cassette and is wound on the delivery reel.

[0035]

As described above, the video cassette recorder equipped with the capstan motor assembly according to the present invention applies the pressure to the timing belt by the tension device during the operation of the driving mechanism. By enabling the firm engagement between the timing belt and the first and second timing gears, the driving force of the capstan motor can be effectively transmitted to the delivery reel table and the take-up reel table. To do so.

Further, since the traveling of the timing belt is guided by the contact portion of the guide roller, the timing belt is prevented from being disengaged from the first and second timing gears during traveling.

Also, the video cassette recorder equipped with the capstan motor assembly according to the present invention has a conventional rubber structure because the driving force of the capstan motor is transmitted to the feed reel table and the take-up reel table through the timing belt. It has an advantage that driving efficiency is improved as compared with a video cassette recorder having a belt manufactured from a product.

Although the present invention has been described in detail with reference to the embodiments, the present invention is not limited to the embodiments and may be separated from the spirit and the spirit of the present invention as long as the person has ordinary knowledge in the technical field to which the present invention belongs. Without, the invention could be modified or altered.

[Brief description of drawings]

FIG. 1 is a perspective view showing an internal structure of a video cassette recorder according to an embodiment of the present invention.

FIG. 2 is a bottom view of a video cassette recorder provided with a capstan motor assembly according to an embodiment of the present invention.

FIG. 3 is a perspective view showing a coupled state of the tension device and the timing belt of the capstan motor assembly according to the embodiment of the present invention.

FIG. 4 is a perspective view showing an internal structure of a conventional video cassette recorder.

[Explanation of symbols]

 100 Video Cassette Recorder 105 Head Drum 110 Base 112 Feeding Reel Stand 114 Takeup Reel Stand 114 Idler Assembly 150 Friction Gear 152 Central Gear 200 Capstan Motor Assembly 210 Capstan Motor 220 First Timing Gear 230 Timing Belt 240 Second Timing gear 300 Tension device 310 U-shaped frame 312,334 First and second connecting pins 320,322 First and second connecting rods 324,326 First and second tension springs 330 Cylindrical roller 332 Contact Department

Claims (9)

[Claims] 1. A capstan motor assembly for a video cassette recorder, comprising a base on which a take-up reel stand and a take-up reel stand are mounted on an upper surface thereof, and a positive drive for driving the take-up reel stand and the take-up reel stand. A capstan motor that rotates in opposite directions and that is attached to the bottom of the base, a first timing gear that is integrally formed on the top of the capstan motor, and a first predetermined gear with respect to the first timing gear. A second timing gear installed at a distance from each other; a timing belt connecting the first and second timing gears to each other; and a first means for applying tension to the timing belt. A capstan motor assembly for a video cassette recorder, characterized by: 2. The frame, wherein the first means is fixed to the bottom of the base at a second predetermined distance from the timing belt, and the frame is spaced from the timing belt at a third predetermined distance from each other. First and second connecting rods, one end of which is respectively coupled to an upper portion of the frame and the second end of which is extended to a position of the timing belt, and between the first and second connecting rods. And second means for rotatably supporting the timing belt, and third means for urging the second means with respect to the timing belt.
A capstan motor assembly for a video cassette recorder according to claim 1. 3. A capstan motor assembly for a video cassette recorder as claimed in claim 2, wherein said second means includes a cylindrical roller. 4. The cylindrical roller comprises the first and second rollers.
4. A capstan motor assembly for a video cassette recorder as claimed in claim 3, wherein said cap rod motor is rotatably connected to the second end of said connecting rod by means of a connecting pin. 5. The capstan motor assembly for a video cassette recorder according to claim 3, wherein the cylindrical roller is provided with a contact portion that rotatably contacts the timing belt. 6. The video cassette recorder according to claim 5, wherein the frame has a substantially U-shape, and one outer wall of the U-frame is welded to a bottom of the base. Capstan motor assembly. 7. The first ends of the first and second connecting rods are connected to the U by a pair of first connecting pins.
7. The capstan motor assembly for a video cassette recorder as claimed in claim 6, wherein the capstan motor assembly is hinged to both inner wall surfaces of the character frame. 8. The second ends of the first and second connecting rods are respectively coupled to both outer walls of the cylindrical roller by a pair of second connecting pins. A capstan motor assembly for a video cassette recorder according to claim 7. 9. The third means includes first and second tension springs, the first tension spring including a second end of the first connecting rod and a front lower wall of the U-shaped frame. And a second tension spring connected between a second end of the second connecting rod and a second position of a lower front wall of the U-shaped frame. 7. The capstan motor assembly for a video cassette recorder according to claim 6, wherein the first and second positions are separated from each other by a fourth predetermined distance.