JPS6120692Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention is a loading drive stop mechanism used in a video tape recorder when the tape is wound around a rotary head, etc., is run by a capstan, etc., and is unloaded to a stopped state. It is related to.

Conventionally, this type of video tape recorder was
For example, JP-A-49-24107, JP-A-51-43906
Publication No. 54-51815, etc.
All of these are constructed so that the tape is drawn out from the cassette and loaded by rotation of a single loading ring. For this reason, the range of movement of the pinch rollers, etc. that pull out the tape becomes extremely large, making the structure complicated, and loading and unloading also requires a considerable amount of operating time, making it difficult to quickly load and unload the tape. There was a drawback that I couldn't do it.

Therefore, the present invention uses two loading devices that rotate in opposite directions to wrap the tape pulled out from the cassette so as to surround the rotating head from both sides, reducing the time required for loading and unloading by approximately half the time required for conventional loading and unloading. This portable tape recorder not only can be shortened in size, but also has a compact overall structure, and also has excellent performance by reliably stopping the rotation of these two loading gear rings at the end of loading and unloading. It is most suitable for

An embodiment of the present invention will be described in detail below with reference to the drawings.

FIG. 1 shows the entire mechanism in a non-operating state, where 1 is a group of operation buttons, 2 is a supply reel, 3 is a take-up reel, 4 is a pinch roller, 5 is a tape pull-out pin, 6 is a rotary head, and 7 is a take-up reel. 1 is an audio/control head, 8 is a full-width erasing head, 9 is an audio erasing head, 10 is a capstan, 11 is a flywheel, 12 is a first loading gear ring that pivots the pinch roller 4, and 13 is the tape drawer. a second loading gear ring having a pin 5;
14 is a plunger that presses the pinch roller 4 against the capstan 10, 15 is an idler for driving the take-up reel 3, 16 is a fast forward transmission gear, 17 is a rewind transmission gear, 18 is a motor, and 19 is the first loading gear. The transmission gear group 20 transmits the rotation of the motor 18 to the ring 12 and the second loading gear ring 13, and 20 is an automatic stop plunger, and the detailed structure and related operation of each gear group will be described below.

First, the video tape cassette 21 used in this embodiment is the smallest video tape cassette at present, measuring approximately 106 mm in width, 68 mm in height, and 12 mm in thickness. and a pair of tape reels 22, 2 as shown in the side view of FIG.
The cassette 21 has an opening/closing lid 25 pivotally attached to the top of the cassette 21 on the tape extraction surface at the front edge, and is normally closed by a spring or the like. . Furthermore, as shown in FIGS. 3 and 5, the cassette 21 has a cavity 27 in which the pinch roller 4 is located and a cavity 28 in which the tape pull-out pin 5 is located at the front of the bottom surface. Furthermore, FIG.
The state shown is set to . As shown in FIG. 5, this cassette mounting base 29 is
The height determining pieces 30, 31, 32, and 33 of 1 are formed, and the pieces 32, 33 further form abutting pieces 34, 35 of the opening/closing lid 25. The cassette 2 is placed on the cassette mounting base 29 in the state shown in FIGS. 4 and 5.
1, the tip of the opening/closing lid 25 comes into contact with the abutting pieces 34, 35, and as a result, the lid 25 is placed in an attached state with its front side open. At this time, the pinch roller 4 pivotally mounted on the first loading gear ring 12 and the tape pull-out pin 5 formed on the second loading gear ring 13 are located in the spaces 27 and 28 formed on the front surface of the cassette, Fifth
In order to bring the tape 24 into the loading state (recording and playback state) as shown by the solid line in the figure,
The pinch roller 4 and the pull-out pin 5 are connected to the empty space 2.
7, 28 as shown by the imaginary lines, and by rotating the first loading gear ring 12 and the second loading gear ring 13 in opposing directions as shown by the arrows. , the tape 24 is pulled out by the movement of the pinch roller 4 and the pull-out pin 5 in the loading direction, and the rotating head 6, the audio/control head 7, the full-width erasing head 8, and the audio erasing head 9
Further, the pulled out tape 24 is pressed against the capstan 10 by the pinch roller 4, and recording is performed by feeding and rotating the capstan 10 by the motor 18 and winding the take-up reel 3 by the idler 15. and drives the tape for playback.

The first tape necessary for loading such a tape 24
The loading gear ring 12 and the second loading gear ring 13 are rotated by appropriately coupling the rotation of the motor 18 with the transmission gear group 19.

That is, as shown in FIG. 6, the reference gear 36 provided on the rotating shaft of the motor 18 has two gears 37,
38 are provided so as to be appropriately switched and connected, and FIG. 6 shows the neutral state. One gear 37 is for forward rotation and is connected to a large gear 39, and the other gear 38 is for reverse rotation and is connected to the large gear 39 via an intermediate gear 40. Furthermore, the gear 37 is a T having pins 41 and 42 at both ends.
The plate 43 is pivotally connected to the shaft 44 of the large gear 39 between the pins 41 and 42, and one pin 41 is connected to the gear 37 via a spring 45. is being pulled in the direction of connection to the reference gear 36. Further, the gear 38 is pivotally connected to the other end of an L-shaped swinging plate 47 having a pin 46 at one end.
7 is pivotally connected at the middle to the shaft 44 of the large gear 39, and the pin 46 is connected to the gear 3 through a spring 48.
8 is suspended in the direction of connection to the reference gear 36. In this manner, rotation in the forward and reverse directions is transmitted to the large gear 39 by switching the two swing plates 43 and 47. A small diameter gear 49 is integrally formed with the large gear 39.
The rotation of 9 is further transmitted to a transmission gear 50 and a small diameter gear 51 integrated therewith.

On the other hand, the first loading gear ring 12 has a gear groove formed on its inner periphery, and the ring 12 is supported in the radial direction via support gears 52, 53, and 54. One support gear 52 forms a gear 55 integral therewith, and the gear 55 meshes with the gear 51 which is transmitted from the motor 18 via either gear 37 or 38.
Therefore, the forward and reverse rotations of the motor 18 are transmitted to the first loading gear ring 12. When the first loading gear ring 12 rotates, this rotation is transmitted to another connecting gear 56 that meshes with a gear groove on the inner circumference of the ring 12. Next, the reverse rotation of the first loading gear ring 12 is transmitted to the second loading gear ring 13 rotatably provided on the outer periphery of the rotary head 6 via a gear 57 integrated with the connecting gear 56. . Therefore, by switching the gear 37, the first loading gear ring 12 and the second loading gear ring 1
3 in the directions of the arrows, the pinch rollers 4 and pull-out pins 5 located in the spaces 27 and 28 of the cassette 21 are driven together with the movement of the rings 12 and 13, and the pinch rollers 4 and pull-out pins 5 are driven. The tape 24 in the cassette 21 is transferred to the rotating head 6.
Pull it out to the opposite side around the . One pinch roller 4 presses the tape 24 against the capstan 10 by means of a plunger 14 which is turned on by a mechanism to be described later. At this time, the tape 21 is suspended from the side pulled out by the pull-out pin 5 to the pinch roller 4 side in this order: full-width erasing head 8, rotary head 6, audio erasing head 9, audio/control head 7, and capstan 10. . Note that the support gears 53 and 54 that support the first loading gear ring 12 on the inner periphery are fixed to a gear shaft 59 that is rotatably supported by a press-fit member 58 that is fixed to the chassis C, as shown in FIG. There is.

The rotation stop mechanism for finishing loading and unloading of the first loading gear ring 12 and the second loading gear ring 13 is provided in semicircular grooves 60 and 61 at different heights set on the outer periphery of the first loading gear ring 12. This is done by fitting two rollers 62 and 63 as shown in FIGS. 8 to 11. The stop at the end of loading is performed with the roller 63 fitted into the groove 61 of the ring 12, as shown in FIG.

That is, the roller 63 is pivotally connected to a shaft 64, and a swing plate 66 is suspended via a spring 65 so that the roller 63 is always pressed against the outer periphery of the ring 12.
It is rotatably installed at one end of the. The rocking plate 66 is arranged so that the roller 6
3 is formed as a bite angle and a relief angle in the unloading direction. A V-shaped groove 67 is formed in the swing plate 66, and a pin 41 provided at one end of a T-shaped swing plate 43 in which the forward rotation gear 37 is provided is engaged with the V-shaped groove 67. In the state shown in FIG. 8 during loading, the roller 63 is moved to the ring 1.
When the rocking plate 66 is inserted into the groove 61 from the outer periphery of the ninth
Rotate in the direction of the arrow in the figure, pull the pin 41 of the swing plate 43 against the spring 45 on one side of the V-shaped groove 67, rotate the swing plate 43 about the shaft 44, and shift the gear 37 to the reference gear. Release the mesh from 36. Therefore, the ring 12, which is rotated in the forward direction via the gear 37, stops rotating in the loading direction.

The stop at the end of unloading is performed with the roller 62 fitted into the groove 60 of the ring 12, as shown in FIG. That is, the roller 62 is pivotally connected to a shaft 68, and is rotatably provided at one end of a rocking plate 70 that is suspended via a spring 69 so that the roller 62 is always in pressure contact with the outer periphery of the ring 12. . The rocking plate 70 is formed at an angle in which the roller 62 is inserted in the unloading direction of the ring 12, and at an angle in which the roller 62 is provided in the loading direction. The swing plate 70 is provided with a hook portion 71 at the other end, and the hook portion 71 is attached to the L-shaped swing plate 4 on which the reverse rotation gear 38 is provided.
7 pin 46. When the roller 62 fits into the groove 60 from the outer periphery of the ring 12 in the state shown in FIG. 10 during unloading, the swing plate 70 rotates in the direction of the arrow in FIG. The gear 38 is disengaged from the reference gear 36 by pulling the pin 46 against the spring 48 and rotating the swinging plate 47 about the shaft as a fulcrum. Therefore, the ring 12, which is reversely rotated via the gear 38, stops rotating in the unloading direction. The groove 60 on the outer periphery of the ring 12 is fitted into the groove 60 at a rotational position of the ring 12 in which the pinch roller 4 and the pull-out pin 5 on the relatively interlocking ring 13 are located in the cavities 27 and 28 of the cassette 21, respectively. The groove 61 is set so that the roller 63 is fitted into the groove 61 when the pinch roller 4 and the pull-out pin 5 on the relatively interlocking ring 13 are respectively rotated to the loading end position. be.

Furthermore, switching between the forward rotation gear 37 and the reverse rotation gear 38 is performed using the play button PLAY and the record button in the self-locking operation button group 1, which will be described later.
Performed by REC. When you operate the button PLAY or REC, via these sliding plates 72 and 73,
The shared sliding plate 74 moves. The sliding plate 74 is suspended via a spring 75 so as to oppose the operating direction, and has a cam portion 76 formed at its tip. The cam portion 76 has cam surfaces 77 and 78 with a step on one side as shown in FIG.
7 and 78, one pin 42 of the T-shaped rocking plate 43 on which the forward rotation gear 37 is provided comes into contact, and the pin 42 is regulated against the spring 45 by the cam surface 77. When the buttons 72 and 73 are not operated, the gear 37 is separated from the reference gear 36 and no rotation is transmitted to the rings 12 and 13. However, when either of the buttons 72, 73 is operated, the shared sliding plate 74 moves, the pin 42 comes into contact with the cam surface 78, and the T-shaped sliding plate 43 is slightly rotated via the spring 45. , the forward rotation gear 37 meshes with the reference gear 36. Therefore, the rotation of the motor 18 rotates both rings 12 and 13 via the transmission gear group, and moves the pinch roller 4 and the pull-out pin 5 in the loading direction of the tape 24.

Further, one surface of the common sliding plate 74 forming the cam surfaces 77 and 78 has another stepped cam surface 7.
9 and 80 are formed. The pins 46 of the L-shaped swing plate 47 provided with the reverse rotation gear 38 are brought into contact with the surfaces 79 and 80,
When the pin 46 is restricted by the cam surface 79 against the spring 48, that is, the button PLAY
Or when any of the RECs is in operation, the gear 38 is separated from the reference gear 36. However, if the stop button STOP is operated or the automatic stop mechanism is activated from the loading state as shown in FIG.
When REC is released and the common sliding plate 74 returns via the spring 75 at the same time, the pin 46 of the L-shaped swing plate 47 contacts the cam surface 80 from the cam surface 79, and the swing plate 47
8, the reverse rotation gear 38 meshes with the reference gear 36, and the reverse rotation is transmitted to the rings 12 and 13 to bring them into an unloaded state. In addition, L
The pin 46 of the oscillating plate 47 is moved when the unloading is completed and the roller 62 of the oscillating plate 70 is fitted into the groove 60 on the outer periphery of the ring 12 as described above.
6 is in a position where it contacts the cam surface 80 of the common sliding plate 74, it is restricted by the hook portion 71 of the swinging plate 70, and the reverse rotation gear 38 is separated from the reference gear 36, and the rings 12, 13 No rotation is transmitted to.

When the play button PLAY or the record button REC is operated, the forward rotation gear 37 is connected to the reference gear 36 of the motor 18 via the cam portion 76 of the shared sliding plate 74, and is linked to the rings 12 and 13 to enter the loading state. When this loading is completed, the pinch roller 4 and the pull-out pin 5 are removed as shown in FIG.
When the ring 12 is moved to a predetermined opposing position together with the tape 24, the roller 63 moves against the ring 12 as shown in FIG.
The gear 37 for forward rotation is separated from the reference gear 36 to stop loading, but the rocking plate 66 on which the roller 63 is provided also has an operating piece 82 that turns on a switch 81 that operates the plunger 14. The plunger 14 is turned on when loading is stopped. A pressing plate 83 is provided at the tip of the plunger 14 to press the pinch roller 4 against the capstan 10 via a contact surface 85, and is rotatable about a shaft 84. The idler 15, which transmits the rotation for playback and recording, is interlocked and connected via a connecting plate 87 to a long sliding plate 86, which moves the idler 15 toward and away from the idler 15. Loading is performed from the state shown in Figure 1,
As shown in FIG. 12, when the plunger 14 is turned on, the shaft of the pinch roller 4 is
The roller 4 is pressed against the capstan 10, and the tape 24 is transferred while being held therebetween.

A tongue piece 88 is provided on the pressure contact plate 83,
The tongue piece 88 abuts one end of the connecting plate 87.
The connecting plate 87 rotates about a shaft 89 as a fulcrum, and the other end is operatively connected to a rising piece 90 of the long sliding plate 86. On the other hand, the idler 15 is provided on an arm 92 that swings about a shaft 91, and the edge 93 of the arm 92 and the other rising piece 94 of the sliding plate 86 mutually support the arm 92 and the plate 86. They are butted against each other by a spring 95 that draws them together. Therefore, when the plunger 14 is turned on, the idler 15 moves in the direction of the arrow as the sliding plate 86 comes into contact with the small diameter portion 96 that is also provided at the bottom of the take-up reel 3, and moves in the take-up direction via a drive mechanism that will be described later. transmits the rotation of

Next, when the playback/recording ends and the stop button STOP is operated, the plunger 14 is turned off, and the pinch roller 4 is released from pressure contact with the capstan 10. Further, the pin 42 of the T-shaped rocking plate 43 that provides the forward rotation gear 37, which is separated from the reference gear 36 by fitting into the groove 61 of the roller 63, is returned to the common sliding position by the stop push button STOP. It is in contact with the cam surface 77 of the moving plate 74,
The gear 37 is kept separated from the reference gear 36. At the same time, the pin 46 of the L-shaped rocking plate 47 on which the gear 38 for reverse rotation is provided is such that the roller 62 is on the outer periphery of the ring 12 (not fitted into the groove 60), and the hook portion 71 of this rocking plate 70 is on the pin 46. Since the shared sliding plate 7 is in an open state,
At this time, the reverse rotation gear 38 meshes with the reference gear 36 and is in an unloaded state. However, even if the plunger 14 is turned off and is in the unloading state, the loaded tape 24 must be wound into the cassette 21 along with the unloading operation. Therefore, as shown in FIG. 13, the long sliding plate 86 prevents the plate 86 from returning even when the plunger 14 is turned off, and also allows the idler 15 to be attached to the small diameter portion 96 of the take-up reel 3. A swing plate 97 is formed to maintain the pressed state. The swing plate 97 is pivotally connected to a shaft 98 in the middle, and has one end interposed between two rising pieces 99 and 100 formed on the long sliding plate 86.
The other end is brought into contact with the pin 42 of the L-shaped swing plate 47. When the reverse rotation gear 38 meshes with the reference gear 36 and is in the unloaded state as described above, the pin 46 of the swing plate 47 is connected to the swing plate 9.
7 is pressed, the swing plate 97 is rotated via the fulcrum 98, and one end is blocked via the rising piece 99 from the sliding plate 86 attempting to return when the plunger 14 is turned off. Therefore, even during unloading, the idler 15 is connected to the small diameter portion 96 of the take-up reel 3.
The reel comes into contact with the reel and winds up the reel.

Further, to describe in detail the mechanism required for suspending the tape 24 during loading, the pinch roller 4 provided on the ring 12 has one end attached to a cylinder 113 fixed to the ring 12, as shown in FIGS. 14 and 15. Arm 102 pivotally connected via 101
It is pivotally connected to a shaft 103 at the other end. Furthermore, a pin 104 is attached to the tip of the arm 102, and a shaft 1 is attached in the middle.
A tapered roller 107 is provided at the other end of the small arm 106 which is pivotally connected via the small arm 106. The arm 10
2 is a shaft 101 fixed to the cylinder part 1.
13 can be moved up and down via a spring 108,
and the pinch roller 4 of the arm 102 is connected to the ring 1.
It is designed to escape in the direction of the outer circumference of No. 2 (in the direction of the arrow). The taper roller 107 also has a ring 12.
The spring 109 is arranged to escape toward the outer periphery of the spring 109. Further, a loading guide 110 appropriately fixed to the chassis C is provided in the loading path of the pinch roller 4, etc., so that the pinch roller 4 and the tapered roller 107 are moved toward the outer circumference of the ring 12 via springs 108 and 109 in the escape direction. The shaft 10 of the pinch roller 4
3 and the tapered roller 107 are in contact with the guide 110 and guide it from the loading start point to the end point. Furthermore, during the loading trajectory of the pinch roller 4, a guide plate 112 having a tapered surface 111 that contacts the upper end of the shaft 101 to which the arm 102 is fixed is fixed to a head stand 113a on which the heads 7, 8, and 9 are provided. There is. At the same time as loading, the tape 24 pulled out by the pinch roller 4 is suspended along a tape guide groove 115 formed diagonally corresponding to the head gap 114 of the cylinder portion of the rotary head 6; The upper end of the shaft 101 is guided by a tapered surface formed on the lower surface of the guide plate 112 corresponding to The tape 24 moves downward from the pull-out pin 5 side that moves relative to the rotating head 6.
The tape is suspended diagonally from the tape guide groove 115 of the tape. This is because the recording signal is recorded diagonally on the tape 24. Furthermore, the arm 10 of the pinch roller 4
The taper roller 107 provided on the small arm 106 pivotally connected to the spring 1 contacts the pin 116 formed there at the loading end point, as shown in FIGS. 5 and 12, and the small arm 106
The tapered roller 107, which rotates through the tape 24 through the tape 24, escapes the tape outwardly and prevents it from rubbing against the tape guided toward the rotating head 6 and the heads 7 and 8.

Further, as shown in FIGS. 14 and 16, the pull-out pin 5 has a shaft 1 erected on an arm 117 extending from the second loading gear ring 13.
18 is pivotally attached to the upper end. In addition, the arm 117
A rocking plate 120 is formed to be pivotally connected to a shaft 119 fixed to the shaft 119. The swing plate 120 is connected to the arm 1 via the shaft 119 slightly closer to the ring 13 than the pull-out pin 5.
17, and a tape pin 124 is formed on the outside of the pull-out pin 5, and the plate 120 has a curved portion 123 from the shaft 119 portion outward of the shaft 118 and on the side where the tape pin 124 is formed. A protruding piece 122 is formed at the outer tip to abut on a pin 121 formed at a position opposite to the pin 116 at the loading end point. The plate 120 is further connected to the curved portion 1 via a spring 124' provided on the pivot shaft 119.
23 is always in contact with the circumferential surface of the shaft 118 of the pull-out pin 5. Then, when the pull-out pin 5 moves to the loading end point, the swing plate 120
The protruding piece 122 at the tip contacts the pin 121, the plate 120 rotates against the spring 124', and the pin 124 that suspends the tape 24 moves away from the pull-out pin 5 and toward the rotating head 6 and head 8. I try not to rub the back against the guided tape.

Therefore, as shown in FIG. 5, the tape 24 pulled out from the reels 22 and 23 in the cassette 21 is connected to the pin 24, the pull-out pin 5, and the full-width erasing head from the side of the tape reel 23 fitted into the two shafts of the supply reel. 8. A tape reel that is inserted into the three take-up reel shafts through the rotating head 6, the audio erasing head 9, the audio/control head 7, between the capstan 10 and the pinch roller 4, the pin 104, the pinch roller 4, and the tapered roller 107. It is loaded on the 22 side.

Next, the tape fast forwarding/rewinding mechanism is shown in FIGS. 17 and 18. When the fast forward button FF is operated, the button FF self-locks and the first
As shown in FIG. 7, a fast feed transmission gear 126 is pivotally connected to the slide plate 125 between the pair of reels 2 and 3.
meshes with a gear formed on the circumferential surface of the take-up reel 3, and rotates the take-up reel 3 in the winding direction via the gear 126, which is rotated by a drive mechanism to be described later. The slide plate 125 has a spring 1
27 in the return direction.

Also, when you operate the rewind button REW, the button
The REW is self-locked, and the slide plate 1 is moved between the pair of reels 2 and 3 as shown in FIG.
A rewind transmission gear 129 pivotally connected to the supply reel 2 meshes with the gear formed on the circumferential surface of the supply reel 2 and the fast-forward transmission gear 126, and transmits the rotation of the fast-forward gear 126, which is rotated via a drive mechanism described later, to the rewind. The signal is transmitted to the supply reel 2 via the gear 129, and the supply reel 2 is rotated in the unwinding direction. The slide plate 128 is suspended in the return direction via a spring 130.

The fast forward transmission gear 126 and the rewind transmission gear 129 move between the pair of reels 2 and 3, and the gear 126 moves between the take-up reel 3 and the gear 12.
9 is connected to the non-moving gear 126 and the supply reel 2. Therefore, the pivot points of the gears 126, 129 and the slide plate 1 are designed to achieve the above operation.
Set the position of 25,128. Further, the reels 2 and 3 and the gear 129 are made of synthetic resin, and the gear 126 is made of metal. Therefore, the metal gear 12 is rotated directly by the drive source.
6 meshes with the gear part of the stationary reel 3 and the gear 129 while rotating, so that the gear connection is good. Also, gear 129 has a button REW.
The metal gear 126 rotates first when operated.
The gear 126 on the slide plate 125 connected to and suspended by the spring 127 moves slightly against the spring 127, and at the same time the gear 129 is connected to the gear part of the reel 2.
Gear 126 and gear 129 are well connected.

Furthermore, the slide plates 125 and 128 to which the gears 126 and 129 are pivotally connected have their tips connected to the brake members 131 of the reels 2 and 3.
Elastic members 132, 133 are provided at both ends of the T-shape to press against the small diameter portions 96, 96a of both reels 2, 3, and a long hole 135 is formed into which a pin 134 fixed to the chassis C is inserted. It is designed to slide in the operating direction, and a T is designed to protrude into the member 131.
Both ends of a spring 138, the center of which is wound around the pin 134, are engaged with pins 136 and 137 provided on both sides of the shape to support the member 131 in the return direction (braking direction). Furthermore, the member 131 is T
The slide plate 125, 1 is attached to the pointed head 139 of the letter shape.
so that the tips 140 and 141 of 28 are in contact with each other,
When either of the slide plates 125, 128 comes into contact (during fast forwarding or winding), the member 131 slides against the spring 138 and releases the elastic material from the circumferential surface of the small diameter portions 96, 96a of the reels 2, 3. 132 and 133 are released to release the brake state of the reels 2 and 3.

Furthermore, the T-shaped bottom of the member 131 has a play part 1.
42 and a fixed part 143, and these play parts 142 are attached to the pin 144 fixed on the chassis C.
and the fixed part 143 are switched as appropriate.
That is, a rising piece 145 is formed on one side of the member 131, and the piece 145 is supported by two rocking plates 148 and 149 that are rotatable about shafts 146 and 147 as fulcrums, as shown in FIG. It is interlocked with the rising piece 150 formed in the middle of the elongated sliding plate 86 mentioned above. Therefore, during playback/recording and unloading, when the sliding plate 86 is in operation, the rising piece 150
presses the rising piece 145 of the brake member 131 via the swing plates 148 and 149, and the member 13
1 rotates in the direction of the arrow with the pin 134 as a fulcrum, and the pin 144 comes into contact with one wall of the play portion 144. At this time, the elastic material 132 separates from the small diameter portion 96 of the reel 3, the elastic material 133 comes into contact with the small diameter portion 96a of the reel 2, and while the reel 2 is being braked, the reel 3 whose brake has been released is rotated by the idler 15 and is attached to the tape 24. Add tension and wind.

Furthermore, as shown in FIG. 1, another brake member 151 is provided on the reel 2, and the brake member 1
51 is pivoted at the center, and one end is rotated via a tongue piece 152 to an arm 117 provided with the pull-out pin 5, and when unloading is completed, the brake of the reel 2 is released, and a tongue piece 153 is formed at the other end. And said piece 153
is engaged with one end of a cassette mounting case (not shown) (a case that is pivoted to the chassis and opens and closes on the cassette base 29 after inserting the cassette), and the piece 153 and the cassette are rotated by the rotation of the brake member 151 upon completion of unloading. The engagement with the mounting case is released and the cassette mounting case is made openable. That is, during loading, the engaged state is maintained and the case into which the cassette 21 is fitted is locked so as not to be opened.

Further, the operation button group 1 is of a self-locking type, and this mechanism will be explained based on FIGS. 20 to 23. Brackets 154 and 155 are fixed on the chassis via screws, and a single lever shaft 156 is horizontally suspended between them.
Rewind button REW, fast forward button at equal intervals on 56
FF, stop button STOP, playback button PLAY, and recording button REC operating levers 157, 158,
159, 160, and 161 are pivotally connected. As shown in FIG. 21, which is a cross section of the PLAY portion of the playback button, a dogleg-shaped locking plate 162 is pivotally attached to the brackets 154, 155, and a spring 163 is wound around the pivoting portion. Bracket one end of
6, the other end is engaged with the lower surface of the locking plate 162 to constantly apply a clockwise rotational force to the plate 162. A spring 164 is also wound around the lever shaft 156, and one end of the spring 164 is engaged with the reusable lever 160, and the other end is engaged with an appropriate spring receiver 165, respectively, so that the regeneration lever 160 is always negatively biased to a non-operating state. are doing. Regeneration lever 1 shown in Fig. 21
60 and other levers 157, 158, 159, 1
61 are each integrally formed with a locking protrusion 166 as shown in the same figure, and when each lever 157-161 is turned on, it abuts against the protrusion 166 of these levers 157-161 via a sliding surface 167,
Each of the levers 157 to 161 is to be maintained in an on-operation state, and when not operated, the tip of a locking plate 162 is engaged with a stop piece 168 of each lever 157 to 161.

Further, each of the levers 157 to 161 is provided with an operating piece 169a, which allows each operation of the rewind slide plate 128, the fast forward slide plate 125, the reproduction slide plate 72, and the recording slide plate 73. Each lever 157 should be in contact with a leaf spring 169 provided at the end.
- 161, each plate 128, 125, 72, 73 is slid by the force of this plate spring 169 and is locked in the operating state. Interposing the plate spring 169 in this way means that each plate has 12
The stroke of the actuating piece 169a is made larger than the strokes of the actuating pieces 8, 125, 72, and 73 in order to ensure reliable operation, and is therefore used to absorb the stroke difference. The tip of the lever 159 of the stop button STOP (corresponding to the actuating piece 169a) comes into contact with a stopper 170 protruding from the chassis C, and the locking plate engages the protrusion of the lever 159 (corresponding to the protrusion 166). 16
2. Make sure that the tips do not engage, and then press the stop lever STOP.
I try not to lock the chisel.

Further, when either the rewinding slide plate 128, the fast forwarding slide plate 125, the playback slide plate 72, and the recording slide plate 73 are in the on-operation state, the other plate 128, 125, that is, rewind button REW and fast forward button FF, are locked so that they cannot be operated, and conversely, when either plate 128 or 125 is in the ON operation state, the other plates 72 and 73, that is, playback button PLAY, are locked. and lock the recording button REC so that it cannot be operated. That is, as shown in FIG.
Lever 1 of each plate 128, 125, 72, 73
Protrusions 171, 172, 173, 174 are bent and erected on the operating sides of 57, 158, 160, 161, respectively. On the other hand, a lock plate 179 is provided with tapered surfaces 175, 176, 177, and 178 that abut the projecting pieces 171-174. The board 179
are long holes 180, 181 and pin 1 on chassis C.
The respective levers 157, 15 via 82, 183
8, 160, and 161, and furthermore, a protrusion 184 is provided in the center of the lock plate 179 to hold the plate 179 neutrally and to slide left and right. Pin 1 so that you can recover even if
The protruding piece 184 and another pin 185a on the chassis are located at the center of a spring 186 wound around a U-shaped spring 186.

Therefore, as shown in FIG. 25, when the lever 160 is actuated by, for example, the playback button PLAY, the protrusion 173 of the sliding plate 72 comes into contact with the tapered surface 177 of the locking plate 179, causing the plate 179 to move to the left. , and a negative force is applied in the return direction via the spring 186. The same goes for the recording button REC. At this time,
The protrusions 171, 172 abut against the stop surfaces 187, 188 of the lock plate 179, and the levers 157, 15
8 in the operating direction. On the other hand, when the lever 158 is actuated by the fast forward button FF, the protrusion 172 of the slide plate 125 comes into contact with the tapered surface 176 of the lock plate 179, and the plate 17
9 to the right and is negatively biased in the return direction via the spring 186. At this time, protrusions 173, 17
4 is the stop surface 189, 190 of the lock plate 179
The levers 160 and 161 are prevented from moving in the operating direction.

Furthermore, the supply reel 2, take-up reel 3, and capstan 10 are driven by two pulleys 19 provided on the shaft of a motor 18, as shown by the imaginary lines in FIG.
One pulley 191 of No. 1,192 is connected to the flywheel 11 of the capstan 10 via a belt 193, and the other pulley 192 is connected to the pulley 195 of the fast-forward gear 16 via a belt 194, and further connected to the fast-forward gear 16. The idler 1 is connected to the idler 1 through the belt 197 of another pulley 196 provided.
5 pulley 198 is interlocked.

Furthermore, the automatic stop mechanism turns on the plunger 20 via an electric element (not shown) that detects the end of unloading. The plunger 20 engages the hook portion 200 at the tip of the operating arm 199 with the tip of the dogleg-shaped locking plate 162 on the recording button REC side, as shown in FIGS. Due to the operation of the plunger 20, the spring 1
63, the locking plate 162 is rotated to release the locking plate 162 from the protrusion 166 of the lever 157, 158, 160 or 161 of any button being operated.

Furthermore, the capstan 10 and the head group 7,
8 and 9 are set at opposite positions from the pair of reels 2 and 3 with the rotating head 6 in between. In particular, in this embodiment, the capstan 10, the center axis 201 of the rotary head 6, and the center between the pair of reels 2 and 3 are set on a straight line. Then, the centers of the first loading gear ring 12 and the second loading gear ring 13 are similarly set on the above line, and the pinch roller 4 and the pull-out pin 5 are connected to the capstan 10.
Then, the tape is relatively loaded or unloaded into the heads 7, 8, and 9 in the vicinity of the rotating head 6, so that the tape is pulled out in a substantially lambda shape. Therefore,
The mechanism required for loading can be easily designed, and since a small tape cassette is used as described above, the entire mechanism can be formed simply and compactly.

Although the present invention uses a method in which a roller fits into a ring-shaped groove, other methods may also be used, such as a method in which a leaf spring or other elastic body is used in place of the roller, or a method in which a pin is provided on the ring to switch gear groups. shall be held.

As described above, in the present invention, the capstan 10, the audio control head 7, the erasing heads 8, 9, etc. are set at positions facing the supply reel 2 and take-up reel 3, with the rotary head 6 in between. A first loading gear ring 12 is provided with a pinch roller 4 that presses against the capstan 10 to pull out the tape 24 in the cassette 21 to one side of the rotating head 6, and a first loading gear ring 12 that pulls out the tape 24 in the cassette 21 to the other side of the rotating head 6. A second loading gear ring 13 is provided with a pull-out pin 5, the second loading gear ring 13 is disposed inside the first loading gear ring 12, and the first and second loading gear ring 12,
The first loading gear ring 12 is interlocked with the reference gear 36 of the drive motor 18 through switchable forward and reverse rotation gears 37 and 38. A rotation stop mechanism is provided which engages the reference gear 36 and the forward rotation or reverse rotation gears 37, 38 by fitting into the grooves 60, 61 formed on the circumferential surface of the first loading 1 to disengage the reference gear 36. Alternatively, since the first and second loading gear rings 12 and 13 are stopped when unloading is completed and the rotation stop mechanism operates, the operating time required for loading and unloading is approximately half that of the conventional one. This not only improves work efficiency but also makes the overall structure more compact.Furthermore, the two loading gear rings 12 and 13 are reliably stopped at the end of loading and unloading, resulting in superior performance and portability. It has remarkable effects, such as being ideal for use as a tape recorder.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is an overall view, FIGS. 2 to 4 are explanatory diagrams of a cassette, and FIG. FIG. 6 is an explanatory diagram of the gear group, FIG. 7 is a sectional view showing the first loading gear ring's support gear fixed to the chassis, and FIGS. 8 to 11 are gear group diagrams. 8 is an explanatory diagram of loading operation, FIG. 9 is an explanatory diagram of loading end operation,
Fig. 10 is an explanatory diagram of the unloading operation, Fig. 11 is an explanatory diagram of the unloading completion operation, and Figs. 12 and 13 are explanatory diagrams showing the operating states of each mechanism when the pinch roller press plunger is in operation and when it is stopped. , 14th
15 and 15 are explanatory diagrams of the pinch roller guide, FIG. 16 is a side view of the pull-out pin, FIG. 17 is a partial view of the fast-forwarding state, FIG. 18 is a partial view of the rewinding state, and FIG. 19 is a partial view of the rewinding state. Explanatory diagrams of the brake member, Figures 20 and 21 are the lever mechanism of the operation button, Figure 22
23 are operation explanatory diagrams showing the playback operation locked state in FIGS. 20 and 21, FIG. 24 is an explanatory diagram showing the lock mechanism of the operation button in the non-operating state, and FIGS. 25 and 26. is an explanatory diagram of the operation of the previous figure. 4...pinch roller, 5...pull-out pin, 12...
...Loading gear ring, 18...Motor,
19...Gear group, 37...Forward rotation gear, 3
8... Gear for reverse rotation, 43, 47... Rocking plate, 60, 61... Groove, 62, 63... Roller, 66, 67... Rocking plate.

Claims (1)

[Scope of utility model registration request] A capstan 10 and a voice control head 7 are connected to the formation positions of the supply reel 2 and take-up reel 3.
The erasing heads 8, 9, etc. are set at opposing positions with the rotary head 6 in between, while a pinch roller 4 is provided that presses against the capstan 10 to pull out the tape 24 in the cassette 21 to one side of the rotary head 6. 1 loading gear ring 12 and a second loading gear ring 13 provided with a pull-out pin 5 for pulling out the tape 24 in the cassette 21 to the other side of the rotating head 6. A second loading gear ring 13 is disposed at , and the first and second loading gear rings 12 and 13 are interlocked and connected via gears 56 and 57 so as to rotate in opposite directions. The first loading gear ring 12 is interlocked and connected via forward and reverse rotation gears 37 and 38 that can be switched freely, while the first loading gear ring 1
A rotation stop mechanism that disengages the forward rotation or reverse rotation gears 37, 38 and the reference gear 36 by inserting grooves 60, 61 formed on the circumferential surface of the rotation stop mechanism is provided. 1. A loading drive stop mechanism for a video tape recorder, characterized in that the mechanism is configured to stop the first and second loading gear rings 12 and 13 when the first and second loading gear rings operate.