JPH0724136B2 - TE-PRODING DEVICE - Google Patents

Description

The present invention relates to a tape loading device for a cassette video tape recorder or the like.

[Conventional technology]

In a cassette video tape recorder, etc., since the magnetic tape is stored in the cassette, the cassette is moved to the playing position, the magnetic tape is pulled out of the cassette, and wound around the outer circumference of the rotary drum on which the rotary head is mounted. A so-called tape loading operation is required. In the conventional cassette video tape recorder, the operation of pulling out the magnetic tape from the cassette is performed by rotating the arm with a motor or the like. Further, the winding operation on the rotary drum is performed by rotating a loading ring rotatably provided on the outer periphery of the rotary drum by a motor.

[Problems to be Solved by the Invention]

As described above, in the conventional apparatus, the operations such as the movement of the cassette to the playing position, the pulling out of the magnetic tape, and the winding around the rotary drum are individually performed, so that the apparatus is complicated and large. Not only does it become expensive, but it has the drawback of being expensive. Therefore, it was difficult to apply it to a so-called 8 mm video tape recorder or the like, which is characterized by its small size as compared with the 1/2 inch video tape recorder which has been standardized recently.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and it is intended to speed up the tape loading operation by performing each tape loading operation continuously instead of individually, and to perform a complicated gear train. It is possible to simplify the structure and reduce the size of the device without using a magnetic tape.
An object of the present invention is to obtain a tape loading device that can be wound around a rotary drum up to a required angle of more than 4 degrees.

[Means for Solving the Problems]

A tape loading device according to the present invention is a tape loading device for winding a magnetic tape housed in a cassette around an outer circumference of a rotary drum on which a rotary head is mounted, and a substrate to which the rotary drum is attached,
A cassette substrate on which the cassette is mounted and which is relatively movable with respect to the substrate; and the substrate which is provided on any one of the substrate and the cassette substrate and is moved when the cassette is moved to a playing position. A pair of arms that pulls out the magnetic tape from the cassette in association with relative movement with the cassette substrate and one ends of the arms are connected to each other, and a pair of arms that rotate in opposite directions in association with the relative movement of the cassette substrate. A first link and a pair of second links each having one end connected to each of the other ends of the pair of first links,
A pair of second links that are respectively connected to the other ends of the second links and that move along the outer circumference of the rotary drum by the second links that interlock with the first links to wind the magnetic tape around the outer circumference of the rotary drum. It is equipped with a moving table.

[Operation and Example]

1 and 2 show the structure of the tape loading device of the present invention. In the figure, 1 is a substrate,
A rotary drum 2 to which a rotary head (not shown) is mounted is attached. Reference numeral 3 denotes a cassette substrate on which a cassette is mounted, which has a plurality of pins 5 fitted into a plurality of elongated holes 4 formed in the substrate 1 and is movable relative to the substrate 1. 6 is a capstan attached to the substrate 1, and 7 and 8 are cam grooves formed in the substrate 1. Reference numeral 9 denotes an arm, which is rotatably supported by a fulcrum 10 of the cassette substrate 3. The arm 9 has a pinch roller 11, a guide 12 for drawing out the magnetic tape, and a pin 13 fitted in the cam groove 7 of the substrate 1. Reference numeral 14 denotes an arm rotatably supported on a fulcrum 15 of the cassette substrate 3, a guide 16 for drawing out the magnetic tape, and a pin fitted in the cam groove 8 of the substrate 1.
Has 17. Reference numerals 18 and 19 denote guide plates fixed to the substrate 1 on the outer periphery of the rotary drum 2 substantially symmetrically, and have guide grooves 20 and 21, respectively. Reference numerals 22 and 23 denote movable bases, which are guided by the guide grooves 20 and 21 of the guide plates 18 and 19, respectively, and are movable along the outer circumference of the rotary drum 2. Since the rotary drum 2 is provided so as to be inclined with respect to the substrate 1 by a predetermined angle, the guide plates 18 and 19 are provided in parallel to the substrate 1 (of course, they can be reversed). Mobile platform 22,23
Has rotating guide rollers 24 and 25, and guide poles 26 and 27 inclined at a predetermined angle. 28, 29 and 3
Reference numerals 0 and 31 are links provided so as to transmit the relative movement between the substrate 1 and the cassette substrate 3 to the moving bases 22 and 23,
The shafts 32 and 33 are rotatably connected to each other. The links 28, 30 rotate in opposite directions in conjunction with the relative movement of the cassette substrate 3, and each of the ends has a pair of first pairs.
The links 29, 31 form a pair of second links that are linked to the links 28, 30 each having one end connected to the other end of each of the links 28, 30 as the first link. . Pins 34 and 35 are respectively provided on the cassette substrate 3, and are fitted in the holes 45 and 46 of the links 28 and 30, and the long holes 36 and 37 of the substrate 1, respectively. Small slots 38,39 are provided in the links 28,30, respectively, and a pin 40 is fitted therein. The pin 40 also fits into a small slot 41 in the substrate 16. Reference numeral 42 denotes a spring, one end of which is connected to the pin 40 and the other end of which is connected to the substrate 1. 43 and 44 are reel stands provided on the cassette substrate 3.

Next, the operation will be described. As shown in FIG. 1, the cassette is mounted on the cassette substrate 3 while the cassette substrate 3 is separated from the rotating drum 2. In the state before such loading is started, the magnetic tape is positioned between the guides 12 and 16, the pinch rollers 11, the guide rollers 24 and 25, the guide poles 26 and 27, and the rotary drum 2. ing. Next, a motor (not shown) is driven or the cassette substrate 3 or the substrate 1 is moved relative to the other by manual operation (for example, the cassette substrate 3 is moved upward in the drawing). At this time, the pins 5 of the cassette substrate 3 are guided by the elongated holes 4 of the substrate 1 and the movement is smoothly performed.

On the substrate 1, the cam groove 7 is formed inward (left side) as it goes upward in the drawing. Therefore, the cassette substrate 3
As the pin 13 moves inward (left side) along the cam groove 7, the arm 9 rotates clockwise.
As a result, the magnetic tape is pulled out of the cassette by the guide 12. Similarly, with the movement of the cassette substrate 3,
Since the pin 17 moves inward (right side) along the cam groove 8, the arm 14 rotates counterclockwise and the magnetic tape is pulled out from the cassette.

On the other hand, when the cassette substrate 3 moves, the long holes 36, 3 of the substrate 1
The pins 34,35 (and therefore the links 28,29,30,31) move up along 7. The pin 40 moves slightly upward in the small long hole 41 of the substrate 1, but the spring 42 fixed at the other end to the substrate 1 blocks the movement, so that the pin 40 of the links 28, 30 is prevented.
The connecting part due to cannot move further upward. Therefore, when the cassette substrate 3 is further moved upward, the pin 40
With the fulcrum as the fulcrum, the link 28 rotates counterclockwise and the link 30 rotates clockwise. At this time, since the links 28 and 30 are provided with small elongated holes 38 and 39, respectively, the rotation is not hindered. As a result, the movable bases 22 and 23 to which the links 29 and 31 are connected are pressed upward, and the movable bases 22 and 23 are guided by the guide plates 18 and 19 to move upward. As a result, as shown in FIG. 2, the magnetic tape is wound around the rotating drum 2 in a substantially symmetrical manner by the guide rollers 24, 25 and the guide poles 26, 27 provided on the moving bases 22, 23. (Of course, by appropriately selecting the positions of the movable tables 22 and 23 (that is, the positions of the guide plates 18 and 19), the winding can be performed asymmetrically in the left-right direction). When the cassette substrate 3 moves upward, the spring
The pin 40 moves slightly upward in the small long hole 41 of the substrate 1 against the biasing force of 42. As a result, pin 40 is spring 42
Is urged downward by a stronger force, and links 28 and 30 are
Since a force for rotating counterclockwise and clockwise with respect to each of the fulcrums 4,35 acts, the movable bases 22,23 are pressed against the upper ends of the guide plates 18,19 and accurately positioned. When the cassette substrate 3 moves the cassette to this playing position, the arm 9 pivots largely clockwise, so that the pinch roller 11 presses the magnetic tape onto the capstan 6. Therefore, the magnetic tape can be run by the capstan 6 and the pinch roller 11.

In the above description, the drawing operation and the winding operation for the magnetic tape are performed by different members, but they can be performed by the same member. Further, the relative motion between the substrate 1 and the cassette substrate 3 may be a rotary motion or a combination thereof, instead of the linear motion as described above.

〔The invention's effect〕

As described above, according to the present invention, the magnetic tape is pulled out from the cassette by the pair of arms that interlock with the relative movement of the substrate and the cassette substrate when the cassette is moved to the playing position. Of the first link of the pair of first links are rotated in opposite directions and the other ends of the pair of first links are respectively connected to one ends of the pair of second links to rotate the movable table. Since the magnetic tape is moved around the outer circumference of the drum to wind the magnetic tape around the rotating drum, a pair of left and right link mechanisms are connected at the central portion to interlock with the relative movement of the cassette substrate with respect to the substrate. The pair of first links rotate in opposite directions with the connecting portion as a fulcrum,
The winding operation of the magnetic tape around the rotating drum can be completed almost at the same time on the left and right.

Further, the tape loading operation can be speeded up by continuously performing each of the tape loading operations instead of individually.

Further, since a complicated gear train is not used, the structure can be simplified and the device can be miniaturized to be applied to a compact video tape recorder or the like.

Moreover, the magnetic tape can be wound around the rotating drum up to the required angle of 180 degrees or more.

[Brief description of drawings]

FIG. 1 is a plan view of the tape loading apparatus of the present invention when loading is started, and FIG. 2 is a plan view when the loading is completed. 1 …… Substrate 2 …… Rotating drum 3 …… Cassette substrate 4,36,37,38,39,41 …… Long hole 5,13,17,34,35,40,45,46 …… Pin 6 …… Capstan 7,8 …… Cam groove 9,14 …… Arm 10,15 …… Support point 11 …… Pinch roller 12,16 …… Guide 18,19 …… Guide plate 20,21 …… Guide groove 22,23… … Mobile platform 28,30 …… Link (1st link) 29,31 …… Link (2nd link) 42 …… Spring

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP 59-171070 (JP, A) JP 59-113563 (JP, A) JP 59-186164 (JP, A) JP 58- 220264 (JP, A) JP 59-107447 (JP, A) JP 61-211863 (JP, A) JP 50-35696 (JP, Y1)

Claims (1)

[Claims] 1. A magnetic tape housed in a cassette,
In a tape loading device that winds around an outer circumference of a rotary drum on which a rotary head is mounted, a substrate on which the rotary drum is mounted and a cassette substrate on which the cassette is mounted and which is relatively movable with respect to the substrate. And the magnetic tape is pulled out from the cassette in association with the relative movement of the substrate and the cassette substrate, which is provided on one of the cassette substrates of the substrate and is performed when the cassette is moved to the playing position. A pair of arms, one end of each of which is connected to each other, and a pair of first links that rotate in opposite directions in conjunction with the relative movement of the cassette substrate, and one end of each of the other ends of the pair of first links. A pair of second links connected to each other, and the second link linked to the other end of the second link and interlocking with the first link. Tape loading device according to claim rolling to the magnetic tape moves along the outer periphery of the drum and a pair of movable carriage for winding the outer periphery of the rotary drum.