JPH0221069B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cassette-type VTR suitable for use as a front-operated VTR. Household cassette-type VTRs currently on the market
The mainstream method is to raise and lower the cassette horizontally on the top of the VTR body. This is because in a cassette-type VTR, it is necessary to perform a loading operation in which the tape pulled out from the tape outlet of the cassette is wrapped around a guide cylinder containing a rotating head, so it is ideal to place the guide cylinder in front of the tape outlet of the cassette. This is because it is considered a target. On the other hand, most audio tape decks are of the front-operated type with vertically arranged cassettes. This front-operated deck makes effective use of the top space and can be stored in racks with limited height, such as component racks, making it extremely effective. It is hoped that the However, in order to realize a front-operated VTR, the loading operation described above must be performed by, for example, pulling out the tape laterally from the tape outlet of the cassette and wrapping it around a guide cylinder placed on one side of the cassette. Therefore, this loading operation has become complicated and difficult. The present invention has been devised in view of the above-mentioned points, and it is an object of the present invention to provide a cassette-type VTR that can easily realize the loading operation of a front-operated VTR. An embodiment in which the present invention is applied to a front-operated cassette type VTR will be described below with reference to the drawings. Figure 1 shows an external perspective view of the VTR, and 1 is
The VTR body has a thin structure with the height as low as possible. 2 is a front panel with a cassette holder 3 attached to one side thereof, and a cassette 4
are attached and detached using this cassette holder 3. The cassette 4 is installed in a so-called horizontal position with the tape outlet facing downward, and in a vertical position.
Further, the front panel 2 is provided with operation knobs and the like, so that various operations can be performed from the front. Next, each component will be explained according to FIGS. 2 and 3. 5, 5 are positioning pins that fit into the through holes of the cassette 4 and position the cassette; 6,
7 is a supply and take-up reel stand, 8 is a capstan located in the notch 4a of the cassette 4, 9 is a capstan motor that drives the capstan, 10 is a pinch roller, and 11 is a rotatable support for the pinch roller. This is a pinch roller support lever pivotally supported on a support shaft 12, and the pinch roller 10 is attached to the capstan 8 by a pinch roller pressure bonding mechanism (not shown).
is crimped. Reference numeral 13 designates a tape running path regulating guide pin disposed at the tip of the pinch roller support lever 11 to prevent the tape from being caught in the pinch roller 10. Reference numerals 14 and 15 have upper and lower guide cylinders around which a tape is wound for more than 180 degrees, and which are arranged on one side of the cassette 4 and are inclined in the direction of the arrow, so that only the upper cylinder rotates clockwise together with the rotary head. 16 is an impedance roller arranged to stabilize tape running, 17
is an impedance roller support lever that rotatably supports the impedance roller, and this lever is rotatably supported by a support shaft 18 and is supported by a torsion spring 1.
9, it is biased clockwise. 20 is a full-width erasing head disposed on the impedance roller support lever, and 21 is a fixed guide post supported near the full-width erasing head. 22 is an audio and control signal recording/reproducing head;
Fixed guide posts 23 and 24 are arranged on both sides of the recording/reproducing head, and these are supported by a recording/reproducing head support block 25. Furthermore, intermediate guide posts 26 and 27 are disposed to protrude inward of a support plate 28 that protrudes in an L-shape in front of the chassis. A tape end sensor 29 is disposed between the intermediate guide posts 26 and 27 and has a sensor coil built into a cylindrical body, and detects the end of the tape on the supply reel side. Next, the loading mechanism in this embodiment will be explained. The loading mechanism of this embodiment performs the operation of pulling out the tape laterally from inside the cassette 4 and the operation of winding the pulled out tape around the guide cylinders 14 and 15 at a predetermined angle. It is characterized by being performed entirely by linear movement of the body. First, the linear movement mechanism will be explained with reference to FIGS. 2, 3, and 4. A worm gear 30 is disposed horizontally below the chassis, and both ends are supported by bearings 31 and 32. A drive gear 33 is disposed between one end of the worm gear and the bearing 31.
is provided. The drive gear is driven by a drive motor (not shown). Reference numeral 34 designates a moving block that is screwed into the worm gear 30, and has a screw thread cut on its inner peripheral surface corresponding to the function of a worm wheel, and grooves 34a, 34a having a U-shaped cross section are provided on both sides. ing. 34b,3
4c is provided on the moving block and includes a second
These are a locking member and a leaf spring that lock the third rotating arm. Support rails 35 , 36 , and 37 support the moving block, and clamping portions 35a, 36a, and 37a protrude from opposite sides of the moving block and are clamped by fitting into the grooves 34a and 34a. The support rail is composed of three parts, namely, the first part 35 supports the moving block 34 from below and is formed continuously in the horizontal direction, and the support rail supporting the moving block 34 from above is located near the center. Although it is divided into a second portion 36 and a third portion 37 and is cut out in the middle, this cutout portion is shorter than the entire length of the moving block 34 , so there is no problem with movement. Therefore, the moving block 34 can be moved in both directions from the left end to the right end of the chassis by the forward and reverse rotation of the worm gear 30. Next, the rotating arm supported on the moving block will be explained. Reference numerals 38 , 39 , and 40 designate first, second, and third rotating arms, which are stacked one on top of the other in order from the one closest to the chassis surface and are rotatably supported on a support shaft 34d on the moving block 34 , respectively. The first rotating arm 38 has an elongated hole 38a and a protrusion 38b near its tip, and a first slide plate 41 and a first guide block 42 are stacked above it, and a locking pin 43a of the first guide flange 43 is inserted from below.
connects the elongated hole 38a of the first rotating arm 38 and the through hole 41a of the first slide plate 41, and fits into the first guide block 42. Further, the protrusion 38b on the first rotating arm 38 loosely fits into the elongated hole 41b of the first slide plate 41 . Furthermore, the first rotating arm 38
There are springs 44, 44 between the and the first slide plate 41 .
is stretched, and the first slide plate 41 is urged in a direction to protrude forward with respect to the first rotating arm 38 , and the locking pin 43a and the protrusion 38b are respectively inserted into the elongated hole 3.
It abuts and is locked against the ends of 8a and 41b. The first guide block 42 is rotatable about the locking pin 43a relative to the first slide plate 41 , and the protrusion 41c on the first slide plate 41 has an arc shape formed on the lower surface of the first guide block. By loosely fitting into a notch (not shown), the rotation angle is regulated, and furthermore, it is locked in the normal state by biasing the spring 45 in the clockwise direction. Therefore, in the normal state, the first rotating arm 38 , the first slide plate 41 , and the first guide block 42 are integrated. Further, 43b is a flange portion forming a part of the first guide flange 43 , and 43c is a guide protrusion. The second rotating arm 39 also includes the first rotating arm 38 .
The structure is substantially the same as that of the first rotating arm 38, and the overall length is slightly shorter than that of the first rotating arm 38 . That is,
The screw 46 connects the elongated hole 39a of the second rotation arm 39 and the through hole 47a of the second slide plate 47 to connect the second
It is screwed into the bottom of the guide block 48, and the protrusion 39b on the second rotating lever 39 is loosely fitted into the elongated hole 47b of the second slide plate 47 . A spring 49 is stretched between the second rotating arm 39 and the second slide plate 47 , and a spring 49 is also stretched between the second rotating arm 39 and the second slide plate 47.
0 is displayed. Further, an engagement pin 39c and a second guide flange 39 are provided on the lower surface of the second rotating arm 39.
d. A protruding piece 39e protrudes from the side surface. Therefore, the second rotating arm 39 , the second slide plate 47 , and the second guide block 48 are also locked together in the normal state. On the first and second guide blocks 42 and 48, there are first and second guide pins 51 and 52, respectively, which form a predetermined tape path, and guide cylinders 14 and 15 which are inclined at a predetermined angle and which are inclined to load the tape. First and second inclined pins 53 and 54 are arranged. On the other hand, the third rotating arm 40 has a shorter overall length than the second rotating arm 39 , has a third guide pin 55 forming a predetermined tape path at its tip, and an engagement pin 40a protruding near the other end. A torsion spring 56 is stretched between the dowel pin and the support shaft 34d.
40b is a roller arranged coaxially with the third guide pin. Next, a guide mechanism for guiding the rotating arm from the unloading position to the loading position will be explained with reference to FIGS. 2 and 3. 57 is a first L-shaped part that protrudes from the bottom end of the chassis.
The guide plate has first and second cam surfaces 57a and 5 at its ends.
7b is formed, and the engaging pin 40a of the third rotating arm engages with the first and second cam surfaces, and as the moving block 34 moves, the third guide pin 55 is inserted into the notch of the cassette 4. Guidance will be given along a predetermined route from within 4a. Also, on the first guide plate is a tape end sensor 58 for detecting the end of the tape on the take-up reel side.
are arranged. 59 is the second guide plate, and the recess 5
9a and a third cam surface 59b continuous thereto, and the second cam surface 59b is formed in the recess and the third cam surface.
The engagement pin 39c of the rotating arm engages with the second guide block 48 as the moving block 34 moves.
is guided along a predetermined path from inside the cassette notch 4a. Reference numeral 60 denotes a third guide plate provided on the inner wall of the first guide plate 57 , and after the engagement pin 39c of the second rotating arm and the second guide plate 59 are disengaged, the second rotating arm is rotated. It engages with the protruding piece 39e and continuously guides the second rotating arm 39 . Reference numeral 61 denotes a fourth guide plate provided in the vicinity of the pre-recording/re-head support block 25, which engages with the roller 40b of the third rotating arm just before loading is completed, and moves the third rotating arm to the loading completion position. I will guide you to. Reference numeral 62 denotes a first guide rail that guides the first rotating arm 38 from the unloading position to the loading completion position, which forms a substantially V-shaped path, and has an inner wall that is continuously formed from the starting point to the final point. 62a, an outer wall 62b formed from the starting point to the middle point (the bottom of the V-shape), and a clamping wall 62c formed from a position separated by a predetermined distance from the middle point to the ending point. Therefore, from the starting point to the intermediate point, the walls 62a and 62b position the guide protrusion 43c of the first guide flange horizontally with the chassis, and for a predetermined distance from the intermediate point, the moving block 3
The guide protrusion 43c is brought into pressure contact with the inner wall 62a by the leaf spring 34c of No. 4, and its position is regulated. From then on to the end point, the clamping wall 62c is connected to the first guide flange 4.
The inner wall 62a and a portion of the clamping wall 62c clamp the flange portion 43b of No. 3 to restrict the position in the direction perpendicular to the chassis, and a portion of the inner wall 62a and the clamping wall 62c restrict the position of the guide projection 43c in the horizontal direction to the chassis. 63 is the second
A second guide rail that guides the rotating arm 39 from just before the loading completion position to the loading completion position, and a holding wall 63a that clamps the second guide flange 39d is continuously formed, and the second rotating arm moves while being pressed against it. Regulate the position of 39 . Next, the fixing block for fixing the guide blocks on the first and second rotating arms mentioned above at the loading completion position will be explained with reference to FIGS. 5A and 5B. A first fixing block 64 is disposed at the end point of the first guide rail 62 and fixes the first guide block 42 in a predetermined position.
A V-shaped notch 64a into which the two ends fit, and a rotation restriction portion 6 in which the end of the impedance roller support block 17 contacts and restricts rotation of the block.
4b, a second fixing piece 64e having a notch 64d into which the locking pin 43a of the first guide flange 43 fits, and a clamping piece 6 that clamps the protruding piece 42a of the first guide block 42.
4f. 65 is disposed at the end point of the second guide rail 63 and is connected to the second guide block 4.
The second fixing block fixes the second guide block 8 in a predetermined position, and includes fixing pieces 65b, 65b and the second guide block 48, each having V-shaped notches 65a, 65a into which the two ends of the second guide block 48 fit. and a clamping piece 65c that clamps the protruding piece 48a. Reference numeral 66 denotes a press-contact plate which is rotatably supported by a support shaft 67 and has a plate spring shaped into an α-shape.
Rotating pieces 66a and 66b are formed. The pressure contact plate is urged to rotate counterclockwise, and normally the first rotating piece 66a is in the notch 6 of the second fixed block.
It is located at a position that protrudes from 5a and 65a. Next, the back tension mechanism will be explained with reference to FIGS. 2 and 3. Reference numeral 67 denotes a rack plate arranged parallel to the worm gear 30, and is slidable by support shafts 68 and 69 which are loosely fitted into elongated holes 67a in the central portion.
67b is a pinion gear provided at the left end of the rack plate and engaged with the protrusion 34e of the moving block 34. An engagement piece 70 is engaged with the rack plate and is pivotally supported by a support shaft 71, and 70a is a pinion gear formed on the pinion gear. The arcuate notch 70b is a pulley integrally formed coaxially with the pinion gear, and a spring 72 is stretched between it and the chassis to constantly bias the pinion gear 70 in the counterclockwise direction. Therefore, the rack board 67
is forced to the right. Reference numeral 73 denotes a U-shaped back tension lever 73a that is pivotally supported on the support shaft 71.
73b is a bent piece provided on the back tension lever and loosely fits into the arcuate notch 70a; 74 is a back tension pin installed at the pivot end of the lever; A spring stretched between the pinion gears urges the lever to rotate counterclockwise with respect to the pinion gears. Reference numeral 75 is a rotational position detection device consisting of a photo coupler, and the amount of light cutoff changes depending on the rotational position of the back tension lever 73 , and this amount of change determines the amount of braking of the drive motor (not shown) for the supply reel stand 7. A certain tension is applied to the tape by controlling the tension. Incidentally, reference numeral 76 is a stopper provided on the right end side of the chassis to restrict the sliding of the rack plate 67 to the right. In addition, 77 in FIGS. 2 and 3 is the support shaft 7.
A fourth guide pin 80 is installed at the rotating end of the rotating lever to guide a predetermined tape path. Form. 77a is a roller disposed coaxially with the fourth guide pin and slides on the side of the third rotating arm 40 ; 81 is the rotating lever 7;
This is a stopper that restricts the rotation of 7 in the counterclockwise direction. Next, the loading and unloading operations of the mechanism explained above are explained in Figures 3 and 6 to 1.
This will be explained according to Figure 0. First, in the state in which the cassette 4 is installed, that is, in the unloading state, the moving block 34 is located at the left end on the worm gear 30 , as shown in FIG. Guided to the starting point of the rail 62 , the second rotation arm 39 has its engagement pin 39c engaged with the recess 59a of the second guide plate 59, and the third rotation arm 40 has its engagement pin 40a engaged with the first guide. It engages with the end of the first cam surface 57a of the plate 57 . Further, the roller 77a of the rotating lever 77 engages with the side near the rotating end of the third rotating arm 40 , and the back tension lever 73 is moved clockwise by the rack plate 67 being positioned on the left. It is in a rotated position. Therefore, in the notch 4a of the cassette 4 , the capstan 8, the first and second guide blocks 42,
48, the third guide pin 55, the back tension pin 73a, and the fourth guide pin 80 are located substantially in a line. Note that the pinch roller lever 11 is the first
The capstan 8 and the pinch roller 10 are in a position where they are in contact with the guide plate 57 and rotated clockwise, and there is a sufficient distance between the capstan 8 and the pinch roller 10. In this state, turn on the cassette detection switch (not shown).
When closed, the drive motor (not shown) is driven in the forward direction, and the worm gear 30 begins to rotate in the forward direction. The moving block 34 then moves to the right along the support rail and each pivot arm begins to move. At the same time, the upper guide cylinder 14 rotates counterclockwise. First, the tip of the first rotating arm 38 is guided by the first guide rail 62 as shown in FIG.
Pull out the tape from inside a and lower it diagonally until the first
When the guide rail 62 reaches the missing part on one side, it is urged upward by the plate spring 34c of the moving block 34 and guided while being pressed against the inner wall 62a side of the first guide rail 62 , and the first guide block 42 is guided by the intermediate guide pin. It passes through the narrow part between 26, 27 and the support plate 28. Thereafter, the first guide block 42 is held by the holding wall 62c and moves upward while passing between the chassis and the lower guide cylinder 15, and the first guide block 42 fits into the notch 64a of the first fixed block 64 , and further moves the moving block 34 to the right. Due to the movement, the tip of the first rotating arm 38 is pushed upward, but the first slide plate 41 integrated with the first guide block 42 in FIG. The position of the 1 guide block 42 remains unchanged. When the moving block 34 reaches the right end and the drive of the drive motor (not shown) is cut off by a detection switch (not shown), the moving block 34 stops and the first rotating arm 38 moves toward the first fixed block 64. It stops after having a predetermined overstroke. Therefore, the first guide block 42 is fixed in position while being pressed against the first fixing block 64 by the urging force of the springs 44, 44. Next, as shown in FIG. 7, in the second rotating arm 39 , the engagement pin 39c escapes from the recess 59a of the second guide plate 59 due to the movement of the moving block 34 , and the spring 5
The tape is pulled out from within the notch 4a by the third cam surface 59b while being urged toward the moving block 34 by the third cam surface 59b. Then, the second guide block 48 descends in substantially the same trajectory as the first guide block 42, and when the engagement pin 39c and the third cam surface 59b are separated, the protruding piece 39e and the third guide plate 60 are engaged with each other. Then, the second guide block 48 descends to the narrow portion by continuous linear movement. and protruding piece 3
After the third guide plate 9e and the third guide plate 60 are separated, the third guide plate 60 is locked by the locking member 34b of the moving block 34 and moves to the right in parallel with the moving block. Then,
The first rotating arm 38 and the second rotating arm 39 gradually expand. Then, the second rotating arm 39 is guided while being pressed against the second guide rail 63 , and a part of it goes up between the chassis and the lower guide cylinder, and the second guide block 48 is just about to fit into the second fixed block 65. Then, the first rotating piece 66a of the pressure contact plate 66 shown in FIG. 5B is pressed to rotate the pressure contact plate counterclockwise. Then, when the second guide block 48 is fitted into the notches 65a, 65a, the second rotating piece 66b cuts out the side part of the second guide block 48 by rotating the pressure contact plate 66 in the counterclockwise direction. Press to the side. The moving block 34 further moves and stops when it reaches the right end, and the second rotating arm 39 stops after having a predetermined overstroke with respect to the second fixed block 65 .
Therefore, the second guide block 48 is pressed against the second fixed block 65 by the biasing force of the spring 49. Here, the overstroke of the second rotating arm 39 is slightly smaller than that of the first rotating arm 38 , so the pressure contact force is also slightly weaker, but together with the pressure contact of the pressure contact plate 66 , a sufficient pressure contact force is obtained, and the second The guide block 48 is fixed in position. The tape is wound around the guide cylinders 14 and 15 at a predetermined angle by expanding the first and second rotating arms 38 and 39 .
8 is set to be positioned on the first fixed block 64 before the second rotating arm 39 , the tape is gradually wound from the first guide block 42 side, that is, in the rotation direction of the upper guide cylinder 14. Since the tape is wound in the same direction as the tape, loading the tape is extremely smooth. Next, as shown in FIG. 8, the third rotating arm 40 has the engaging pin 40a engaged with the first guide plate 57 , and the movement of the moving block 34 causes the third rotating arm 40 to engage with the first and second cam surfaces 57a and 57b. The third guide pin 55 at the tip follows the same trajectory as the first and second guide blocks 42 and 48 to guide the cassette 4.
Pull out the tape from inside the notch 4a. After the engagement pin 40a and the first guide plate 57 are separated, the second rotating arm is engaged with the engagement member 34b of the moving block 34 and moved to the right. Furthermore,
When the roller 40b comes into contact with the fourth guide plate 61, it rises a little, expands at a predetermined angle with the second rotation arm 39 , and when the moving block 34 stops, the fourth guide plate 6
1, and is fixed in position by the bias of the torsion spring 56. By this third guide pin 55, the recording/reproducing head 22
A tape is then wrapped around the fixed guide posts 23 and 24. Further, as shown in FIG. 9, the movement of the moving block 34 allows the rack plate 67 to slide to the right, so the pinion gear 70 , which is biased by the spring 72, rotates counterclockwise and the rack plate 67 is allowed to slide to the right. Slide the plate 67 to the right. Then, the back tension lever 73 , which is biased counterclockwise with respect to the pinion gear 70 , also begins to rotate in the same direction. Therefore, the back tension pin 73a is connected to the first and second guide blocks 42, 48 and the third guide block.
The tape is pulled out from the notch 4a of the cassette 4 in advance of the guide pin 55. The rotating back tension pin 73a passes through the narrow portion and wraps the tape around the intermediate guide pins 26, 27. Further, when the rack plate 67 slides and comes into contact with the stopper 76 , the engagement with the moving block 34 is released. Then, the back tension pin 73a engages with the rotation detection device 75, operates within the rotation range of the bent piece 73b loosely fitted into the arcuate notch 70a of the pinion gear 70, and detects tape tension. Furthermore, the fourth guide pin 80 on the rotation lever 77
is located within the notch 4a of the cassette 4 because the roller 77a is engaged with the side surface of the third rotating arm 40 due to the urging force of the spring 79, but as the third rotating arm 40 moves, Use that side as a guide to rotate and pull out the tape. After the engagement with the side surface is released, it engages with the stopper 81 and is regulated at that position. Further, the pinch roller lever 11 is rotated counterclockwise by a pinch roller pressure bonding mechanism (not shown) just before loading is completed to press the pinch roller 10 to the capstan 8. When loading is completed as explained above,
As shown in FIG. 9, the first rotating arm 38 is arranged substantially perpendicular to the worm gear 30, the third rotating arm 40 is arranged substantially parallel to the worm gear 30, and the second rotating arm 38 is disposed substantially perpendicular to the worm gear 30 .
9 is arranged at an angle of approximately 45°. Further, the support shaft 34d, which is the rotation center of each rotation arm, is located closer to the cassette 4 than the axes of the guide cylinders 14 and 15 in the horizontal direction. That is, the center point of the tape wound around the guide cylinders 14, 15 is located closer to the cassette 4 than the axis of the guide cylinder. As a result, a tape path as shown in FIG. 10 is formed. That is, the tape fed out from the supply reel is first changed in its path by approximately 180 degrees by the intermediate guide posts 26 and 27 to avoid contact with the cassette 4 , and then the tape tension is detected by the back tension pin 73a and the tape is moved to the fixed guide. post 2
1 full width erase head 20, impedance roller 1
Contact 6. Incidentally, since the impedance roller support block 17 shown in FIG. 9 engages with the rotation restricting portion 64b of the first fixed guide block 64 , it does not come into contact with the guide cylinders 14, 15. After passing through the impedance roller 16, the tape is guided by the first guide pin 51, and then wrapped around the first inclined guide pin 53 at a predetermined angle, so that the tape is wrapped around the cassette 4.
The guide cylinder 1 is inclined at a predetermined angle with respect to the surface.
4, 15 and wrapped around 180 degrees, then the second
By wrapping the tape around the inclined guide pin 54 at a predetermined angle, the above-mentioned inclination of the tape is corrected, and after passing through the second guide pin 52, it comes into contact with the fixed guide post 23, the recording/reproducing head 22, and the fixed guide post 24, and is approximately It is guided vertically, and approximately by the third guide pin 55.
After the 90° path has been changed, the intermediate guide posts 26, 27 and the support plate 28 are guided approximately parallel to the chassis.
It comes into contact with the fourth guide pin 80 through the gap.
Thereafter, the tape passes through the tape traveling path regulating guide pin 13, passes between the pinch roller 10, which is prevented from being wound into the pinch roller 10, and the capstan 8, and is wound onto the take-up reel. Note that when a recording or reproducing operation is performed in this loading state, the capstan 8 and reel stand are driven, the tape is run, and the desired recording or reproducing is performed by the rotary head. However, when a fast forward or rewind operation is performed, , drive motor (not shown)
11 , the tape moves to the position shown in FIG.
4 and 15, and fast forwarding and rewinding are performed with the tape path shortened. Then, when a recording or reproducing operation is performed again, the above-mentioned loading state is returned. Further, when an unloading operation is performed from this loading state, the tape is stored in the cassette 4 by an operation completely opposite to that during loading. As described above, according to the present invention, a front-operated VTR
In this method, the tape is pulled out from inside the cassette in the lateral direction by the tape guide and wound around the guide cylinder by so-called M loading.
In addition, since the tape guides are placed on respective rotary arms and the above-mentioned operation is performed by expanding each rotary arm, the tape path can be made as short as possible, and the loading mechanism can be simplified. In addition, each rotating arm is pivotally supported on a movable body that moves laterally with respect to the cassette, and each tape guide is guided along a predetermined path by an appropriate guide means in conjunction with the movement of this movable body. Since the loading operation can be performed within a small space, a compact front-operated VTR can be realized.

[Brief explanation of drawings]

Each of the drawings shows one embodiment of the present invention.
The figure is an external perspective view, Figure 2 is an exploded perspective view of main parts, and Figure 3 is an exploded perspective view of the main parts.
The figure is a plan view during unloading, Figure 4 is an exploded perspective view of the moving block and rotating arm, Figures 5A and 5B are perspective views of the first and second fixed blocks, respectively, and Figure 6 is the first Diagram explaining the operation of the rotating arm, No. 7
The figure is an explanatory diagram of the operation of the second rotating arm, and Figure 8 is an illustration of the operation of the third rotating arm.
FIG. 9 is an explanatory diagram of the operation of the rotating arm, FIG. 9 is a plan view during loading, FIG. 10 is an explanatory diagram of the tape path during loading, and FIG. 11 is an explanatory diagram of the tapered path during rewinding and fast forwarding. Explanation of main drawing numbers 4 ...Cassette, 14, 15...
Upper and lower guide cylinders, 42, 48...first and second guide blocks, 55...third guide pin, 38 , 3
9, 40 ...first, second, and third rotating arms, 64 ,
65...First and second fixed blocks.

Claims (1)

[Claims] 1. In a cassette-type VTR in which a guide cylinder is disposed on one side of the cassette in a direction substantially perpendicular to the direction in which the tape is pulled out from the cassette, at least first, second, and third guide cylinders are arranged for pulling out the tape from inside the cassette. a tape guide, and first, second, and third rotating arms that support the first, second, and third tape guides, respectively, and each of the tape guides is provided with a It is located in a notch provided in the cassette, and when the tape is loaded, the first and second rotating arms are expanded to wrap the tape around the guide cylinder at a predetermined angle, and the first and second rotating arms A cassette type VTR characterized in that a predetermined tape running path is formed by expanding the third rotating arm relative to the arm.