JPH0438058B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is for recording signals by winding a tape pulled out from a tape cassette at a predetermined angle around a tape guide drum having a built-in transducer, such as a video tape recorder. The present invention relates to a recording/playback device for playback.

Conventional configurations and their problems In recent years, video tape recorders (hereinafter referred to as VTRs) have become popular as this type of device, but when considering the use of mobile devices such as portable VTRs outdoors, In addition to its weight, issues remain with the size of the device itself.

Now, the size limit of the tape running system mechanism of this type of device is determined by the size of the tape cassette and the diameter of the tape guide drum. That is, the size is determined by the design of the tape, which is arranged at a predetermined distance apart on a plane, and then the tape is pulled out from the tape cassette and wound around the tape guide drum.

For example, FIG. 1 schematically shows an example of U loading adopted in a Beta system VTR. As shown in FIG. 1, a tape cassette 2 is placed at a predetermined position with respect to a tape guide drum 1. after that,
Tape 3' stretched over the front of tape cassette 2
is pulled out by a post 5 inserted into an opening 4 provided in the tape cassette 2. That is, the ring 6 on which the post 5 is erected rotates in the direction of the arrow 7, and as the ring 6 rotates, the tape 3 is pulled out, forming a running system for the tape 3.

In this case, the distance l between the tape 3' stretched over the front surface of the tape cassette 2 and the tape guide drum 1 is extremely large, resulting in a disadvantage that the apparatus becomes large. On the other hand, in "M loading" adopted in the VHS system and VTR, although it is not shown in the figure, it is possible to slightly reduce the l value as described above from the tape loading form.
When the tape cassette is installed in a predetermined position, the tape may come into contact with the tape guide drum due to loosening of the front tension tape, which may cause damage to the tape. Therefore, the l value must be a predetermined amount.
As described above, the size of the mechanism in conventional devices is basically determined by the diameter of the tape guide drum, the size of the tape cassette, and the necessary and sufficient l value, making it impossible to hope for a smaller VTR device. Ta.

In contrast, in Japanese Patent Application No. 58-46239, the present inventor proposed a structure in which a part of the tape guide drum is located at least in part of the opening of the tape cassette that stretches the tape during recording or reproduction. I suggested something to do. Once the relative position of the tape guide drum and tape cassette is obtained,
The tape cassette is mounted at a predetermined height on the tape guide drum, which is located a predetermined distance from the tape on the opposite side of the opening, via the tape stretched across the front of the tape cassette, and then We have shown a device that can be realized by shortening the relative position of the At this time, when the relative position is shortened, the tape is pulled out from the tape cassette and wound around the tape guide drum at a predetermined angle, and when the relative position is widened, the tape guide drum enters into the opening and is pulled out. Also, it is necessary to collect the tape pulled out by guide posts into the tape cassette. This is possible by providing a reel drive unit consisting of a reel drive source (motor) and an idler to rotate and drive a reel stand that engages with the reel built into the tape cassette on the side where the tape cassette is placed. becomes. However, when installing a motor that requires high-load torque for fast forwarding and rewinding when winding the tape around a tape guide, on the side where the tape cassette is placed, space is required to install the motor in the thickness direction, and the mechanism is small and thin. This poses a problem when measuring the In addition, if an ultra-thin motor is used, it will be difficult to obtain the necessary torque with sufficiently low power consumption, which will result in an increase in the weight of the battery, and The problem is increased costs.

In response to this, we have devised an arrangement in the thickness direction, and are considering placing the capstan motor, which normally requires relatively light load torque, on the side where the tape cassette is placed, and obtaining a reel drive source from that. However, in that case, the capstan will move in a direction that shortens its relative position to the side on which the tape guide drum is placed, and in particular, it is necessary to move the capstan in order to stably run the tape coming out of the tape guide drum. This is not a good idea since extremely high precision is required to ensure relative verticality.

Purpose of the Invention In view of the above-mentioned problems, the present invention aims to reduce the size of the device while ensuring the collection of the tape into the tape cassette in a recording/reproducing device in which a part of the tape guide drum is positioned in the opening of the tape cassette.・
The aim is to achieve a lightweight and thin design with low cost, low power consumption, and a simple configuration.

Composition of the Invention The recording and reproducing apparatus of the present invention includes a tape cassette mounting section for mounting a tape cassette having an opening on the front surface on which a tape is stretched, a tape cassette mounted on the tape cassette mounting section, and a tape cassette built in the tape cassette. Regarding the relative position of the reel drive unit that rotationally drives the reel stand that engages with the reel to be loaded, and the tape cassette mounting unit,
From a first relative position where a tape guide drum containing a built-in transducer is located on the opposite side of the opening, the tape is placed on the tape cassette loading section through a tape stretched over the front surface of the tape cassette. to a second relative position where the tape guide drum is located at a position where the tape enters the opening through the tape from the stretching position of the tape stretched over the front surface of the tape cassette placed on the cassette mounting section; a drum mounting section arranged to be movable relative to the tape cassette mounting section; a reel drive source placed on the drum mounting section; a first and a transmission path correcting means for displacing the transmission position in accordance with the relative movement between the second relative positions; and a tape pulling means for pulling out the tape from the tape cassette and winding it at a predetermined angle around the tape guide drum located at least at the second relative position. The above objective is achieved by having the following.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings. 2 to 4 show a tape cassette used in a recording/reproducing apparatus according to an embodiment of the present invention. FIG. A tape 9' (indicated by a dashed line in FIG. 3) is wound around a pair of reels 12 and 13 (see FIG. 3) and stretched over the front surface of the tape cassette 8.
The front cover 10 and the back cover 1 cover it by rotation.
Covered by 1.

Fig. 3 is a perspective view of the tape cassette shown in Fig. 2 when it is reversed by 180 degrees, and a post etc. is inserted into the lower surface 8' of the tape cassette 8 inside the tape 9' stretched on the front side. An opening 14 is provided for pulling out the tape 9'. and tape cassette 8
When used in the apparatus of this embodiment, the front cover 10 is opened by a cover opening means (not shown) provided in the apparatus, as shown in the partial cross-sectional view of FIG. The back cover 11 is pivotally supported by a fulcrum support part 10' provided in a part of the front cover 10, and is supported by cam guide grooves provided in side parts 14' on both sides of the opening 14 of the tape cassette 8. 1
4'', one end rotates, and as a result, it does not come into contact with the tape 9' that is stretched on the front of the tape 9 wound on the reels 12 and 13, and as a result, it rotates as shown by the dashed line in FIG. It is released following the predetermined trajectory shown.

On the other hand, the opening 14 shown in FIG. 3 is completely open to a height corresponding to approximately the thickness of the tape cassette 8, and has a built-in post or the like (not shown) or a transducer such as a magnetic head to be described later. This creates a space for the tape guide drum 20 (see FIG. 8) to enter.

FIGS. 5 to 7 are perspective views showing the external appearance of the main unit 15 and an example of the mounting operation of the tape cassette 8 in one embodiment of the present invention.

First, as shown in FIG. 5, the tape cassette 8 is inserted into the cassette holder 16 in the raised position in the direction of the arrow 17 (with the tape 9' stretched on the front facing forward in the insertion direction). Thereafter, as shown in FIG. 6, the cassette holder 16 containing the tape cassette 8 is pushed down in the direction of the arrow 18. Since this function is employed in well-known devices, a detailed explanation of the illustrated configuration will not be provided.

Now, by the above-mentioned operation, the tape cassette 8 is opened by the lid opening means such as a pin or sheet metal provided at a predetermined position of the main unit 15, and the side plate 10'' of the front lid 10.
(See Figure 3) come into contact with each other. When the front cover 10 and the back cover 11 of the tape cassette 8 are opened, the pinch roller 35 and posts 22, 24, 25, 2, etc., which will be described in detail later with reference to FIGS.
7, 30, 31, 32, 33 are the openings 1 of the tape 9' stretched over the front surface of the tape cassette 8.
4 is inserted.

It should be noted here that the tape cassette 8 is mounted at a position separated by a predetermined distance L from the tape guide drum 20 and the tape 9' stretched over the front surface of the tape cassette 8, as shown in FIG. That's true.

Now, continuing from the state shown in FIG.
By pressing 5' in the direction of the arrow 19, or by automatically moving it by a drive source such as a motor as described later, the device main body 15 can be made extremely compact as shown in FIG. 7. .

Next, using FIG. 8, the finally formed running path of the tape 9 and the transducer, e.g.
In the VTR, the relative position of the tape guide drum 20 containing a magnetic head (not shown) and the tape cassette 8 (this corresponds to the second relative position described below) will be explained.

First, the tape 9 whose start and end ends are connected to the supply and take-up reels 12 and 13 built into the tape cassette 8 is supplied from the supply reel 12 and given a predetermined winding angle, respectively, in the running direction of the rotating or fixed tape 9. Posts 21, 22, 23, 24, 2 installed perpendicularly to
5, 26, 27, 28 and erase head 29
In addition, inclined posts 30, 3 are inclined in a predetermined direction and angle with respect to the running direction of the tape 9, respectively.
1, 32, and 33, the traveling position is guided. A reel portion 20' (FIG. 10) is provided on the outer periphery of the tape guide drum 20 so as to be inclined at a predetermined angle.
The winding angle is regulated by the inclined posts 31 and 32. and tape 9
The constant speed running of the tape 9 is carried out by rotating the tape 9 while holding it between a capstan 34 and a pinch roller 35, which are perpendicular to the running direction of the tape 9 and whose axial direction is the same.

Now, the relative positional relationship between the tape guide drum 20 and the tape cassette 8 is as follows.
0 penetrates into the opening 14 of the tape cassette 8 through the tape 9 further than the position where the tape 9' is stretched over the front surface of the tape cassette 8.

Below, the tape guide drum 20 shown in FIG.
The relative positions of the tape cassette 8 and the tape cassette 8, as well as the specific mechanical configuration of the running path of the tape 9, will be described with reference to FIGS. 9 and 10.

In addition, in FIG. 10, the cassette holder 16
5, the state in which the tape cassette 8 can be inserted into the cassette holder 16 is shown by solid lines. In addition, the tape cassette 8 is placed in the cassette holder 16 in the state shown in FIG.
The positional state when the tape cassette 8 is inserted and pushed down in the direction of the tape cassette mounting portion 36 on which the tape cassette 8 is mounted is shown by a dashed line.

First, the cassette holder 16 is held at one end by a fulcrum holding part 39 provided on side plates 37 and 38 fixed to the tape cassette mounting part 36, and by a guide hole part 40, and is held at one end by the fulcrum part 41.
The cassette holder is raised and lowered using a so-called X-link method using link levers 43 and 44, the other end of which is held by a guide hole 42 and a fulcrum holder 44', respectively.
The lifting force of this cassette holder 16 is exerted by the tension spring 4.
5. Although not shown, the side plate 37
A similar X-ring type means is also formed on the side. Further, the means for locking the tape cassette mounting portion 36 of the cassette holder 16 can be achieved by a well-known method, and therefore, explanations using illustrations will be omitted.

In this way, by pressing down the cassette holder 16, the tape cassette 8, which is indicated by a dashed line on the positioning height regulating pins 46, 46' provided on the tape cassette mounting portion 36 and the height regulating pin 47, is moved to a predetermined position. Fixed in height position. Further, as described above with reference to FIG. 4, in the process of this pushing down operation, the front cover 10 is
A pin (not shown) provided so as to come into contact with the lower surface 8' of the tape cassette 8 on the side plate 10'' of the tape cassette 8.
The front cover 10 and back cover 11 of the tape cassette 8 are opened as shown in FIG. post 3
0, 31, 32, 33, and pinch rollers 35 are inserted. When this insertion is completed, that is, as shown in FIG. 10, the drum mounting section 48 on which the tape guide drum 20 is mounted and the tape cassette mounting section 36 on which the tape cassette 8 is mounted are in a predetermined relative position, and the tape cassette is inserted. 8 is mounted on the tape cassette mounting portion 36 at a predetermined height position. At this point, the tape 9' stretched over the front surface of the tape cassette 8 and the tape guide drum 20 are at a predetermined distance L.
(See Figure 9). (In this state, the tape cassette mounting section 36 and the drum mounting section 4
Hereinafter, the relative position with respect to 8 will be referred to as a first relative position. ) From this first relative position, the tape guide drum 20 shown in FIG. 8 completes its entry into the opening 14, and the tape 9 completes the formation of a predetermined running system, that is, the tape cassette placement position. Part 36
and the relative position of the drum mounting portion 48 (the position shown by partial hunting in FIG.
This will be referred to as the second position. ) will be further explained in detail using FIGS. 9 and 10.

First, the drum mounting section 48 and the tape cassette mounting section 36 are moved from the first relative position to the second relative position as shown in FIG.
The pinion 52 is engaged with the rack part 36' of the tape cassette mounting part 36, and the drive gear 56 is engaged with the drive gear 56 to rotate. As a result, the tape cassette mounting section 36 moves in the direction of the arrow 55 while the guide rollers 53 provided on both sides of the drum mounting section 48 are guided and held by the elongated holes 54.

Also, a disk portion 56' integrated with the drive gear 56
An elongated hole 56'' is provided in the elongated hole 56''. A pin 58 set on the worm wheel 57 is inserted into the elongated hole 56'', and the rotational force of the worm wheel 57 is applied via a tension spring 59. communicated.
Further, the worm wheel 50 is engaged with a worm 61 fixed to a motor 60 fixed to the holder 49. Note that after the tape cassette mounting section 36 reaches the second relative position, by further rotating the worm wheel 57 against the tension spring 59, each of the posts 24, 27 moves to both sides of the tape guide drum 20. The tension spring 59 serves to provide a fixed bias to the V stoppers 62 and 63.

Next, the loading operation of the posts 24 and 25 and the inclined posts 31 and 32 that move to both sides of the tape guide drum 20 will be described. First, there are posts 2 on the slide board 65 on the side of the supply reel stand 64 that engages with the supply reel 12 (FIG. 9).
4. An inclined post 31 is installed. On the other hand, a post 25 and an inclined post 32 are installed on the slide boat 67 on the side of the take-up reel stand 66 that engages with the take-up reel 13 (FIG. 9). One end is provided at the drum mounting portion 48, and the other end is provided at the end of movement of the slide boats 65, 67.
As shown in FIG. 9, the posts 24 and 25 are arranged so as to be slidable on slide guides 68 and 69 fixed to V-stoppers 62 and 63 for positioning them, respectively. Also slide boat 65,
Push levers 70 and 71 are provided at the rear end of 67, respectively.
is held, and the other ends of the pressing levers 70 and 71 are supported by support shafts 72 and 73 that are erected on the drum mounting portion 48.
It is rotatably engaged with the tips of rotating arms 74 and 75 having gear portions 74' and 75'. Then, the tape cassette mounting section 36 is located at the arrow 5
5, the gear parts 74' and 75' of the rotating arms 74 and 75 that engage with the rack parts 76 and 77 provided on the tape cassette mounting part 36 rotate, and the rotating arms 74 and 75 rotate. are respectively arrow 7
It rotates in the direction of 8 and 79. This rotation causes the slide boats 65, 67 to move into the slide guides 68, 6.
At the same time, the tape 9' stretched on the front surface shown in FIG. 9 is pulled out and wound on the outer peripheral surface of the tape guide drum 20. Eventually V stopper 62, 63 and slide boat 6
5 and 67, the tape cassette mounting section 36 is further urged in the direction of the arrow 55 by the tension spring 59 stretched between the disk portion 56' of the drive gear 56 and the worm wheel 57 as described above. , V stopper 62, 63, slide boat 65,
67 can be more securely energized and fixed. In addition,
As shown in FIG. 9, there are a post 23 and an erase head 29 (indicated by broken lines in FIGS. 9 and 10) on the movement path of the slide boat 65 on the supply reel stand 64 side, but as shown in FIG. , one end 81' of the arm 82, one end of which is inserted into a support shaft 80 set up on the V stopper 62, is engaged with the V stopper 62, and the other end 81'' is engaged with the arm 82.The torsion coil spring 81 engages the post. 23 is biased in the direction of an arrow 83. Its rotational position is restricted by the contact between the locking protrusion 82' of the arm 82 and the V stopper 62 (see FIG. 9). is rotatably supported on the shaft 23' of the post 23, and is attached to a mounting lever 86 which is biased in the direction of arrow 85 by a torsion coil spring 84.
As shown in the figure, when the slide boat 65 reaches the V stopper 62, the front end 6 of the slide boat 65
5a comes into contact with the end of the arm 82,
The arm 82 twists in the direction of the arrow 87 and the coil spring 8
It rotates against the auxiliary force of 1.

Next, the flange of the post 24 and the erase head 29 come into contact, and the erase head 29 contacts the post 24.
3 as a support shaft, it rotates in the direction of an arrow 88 against the biasing force of a torsion coil spring 84. Therefore, the post 24 reaches the V stopper 62. post 24
When the arm 82 and erase head 29 reach the V stopper 62, the torsion coil springs 81, 84
Return to original position with attached forces. It goes without saying that when the slide board 65 is returned to the opening 14 of the tape cassette 8 again for unrotting, the erase head 29 and the post 23 are rotated in the reverse order. This is performed by the rear end 65b of the slide board 65 and the end of the arm 82 coming into contact with each other.

Next, the operation of the rotating arm 89 that erects the post 22 and the inclined post 30, and the operation of the rotating arm 90 that erects the post 27 and the inclined post 33 and holds the pinch roller 35 will be explained.

First, the rotating arms 89 and 90 are connected to the drum mounting section 48.
The pins 93 and 94 on the drum mounting section 48 are connected to the shafts 91 and 92, respectively.
respectively, and the other end is connected to the rotating arms 89, 9.
0, respectively, and arrows 95 and 9, respectively.
Each torsion coil spring 9 is energized in the direction of 6.
7,98. In the first relative position, the rotational position is the drum mounting portion 4.
Abutment is regulated by pins 99, 100 installed at 8. Furthermore, plate springs 101 and 1 are mounted on the tape cassette mounting portion 36 in correspondence with the rotating arms 89 and 90.
Arm drive contact parts 103, 104 with fixed 02
are provided at a predetermined distance from the rotating arms 89, 90. In the process of moving from the first relative position to the second relative position, the slide board 6
The movement timings of the slide boards 65 and 67 and the respective rotation arms 89 and 90 are set so that the slide boards 5 and 67 move in advance and the rotation arms 89 and 90 move slightly later so as not to interfere with each other during the movement process. has been done. and rotating arm 89,9
0 comes into contact with the arm drive contact parts 103 and 104 for the first time, and is then pressed by the plate springs 101 and 102 against the torsion coil springs 97 and 98, and the post 22 and the inclined post 30 move as indicated by the arrow 105 in FIG. , 106, and the post 27 and the inclined post 33 follow the trajectories of arrows 107, 108 while sliding the slide boards 65, 6, respectively.
The upper portions of the slide guides 68 and 69 after passing through the slide guides 68 and 69 are rotated, respectively. The rotating arm 89 is positioned at the post 22 by the positioning section 109, and the rotating arm 90 is positioned at the post 27 by the positioning section 110, biased by leaf springs 101 and 102, respectively (see FIG. 11). Furthermore, the pressing of the pinch roller 35 held by the rotating arm 90 and its moving process will be explained with reference to FIGS. 10 and 11. As shown in FIG. It is rotatably supported by a holding fitting 111 that supports the upper and lower parts. Further, it is biased in the direction of arrow 112 by a torsion coil spring 117 whose one end is secured to the inclined post 33 and the other end is secured to the holding fitting 111. In the first relative position shown in FIG.
The tape cassette mounting section 3 of the tape cassette 8 is regulated by a stopper section 69' provided in a part of the tape cassette
6, the position is controlled to ensure that it is inserted into the opening 14 (see FIG. 9). A pinch roller pressing lever 114 having a rotation fulcrum 113 is placed on the rotation arm 90, and is rotated clockwise when viewed from the top in the figure by a leaf spring 115 provided at one end of the pinch roller pressing lever 114. It is energized.
Its rotational position is regulated by a pin 116 set on the rotation arm 90. In the process of moving from the first relative position to the second relative position, the rotating arm 90 rotates as the arm drive contact portion 104 moves in the direction of the arrow 55 in FIGS. 11 and 10. The pinch roller 35 is moved away from the stopper portion 69' of the slide guide 69 by the torsion coil spring 117, and the pinch roller 35 is moved toward the arrow 11.
Rotate in direction 2. Then, as shown in FIG. 11, the pinch roller press lever 114 rotates while being held in contact with the contact portion 114'.

Now, at the rotation completion position, as described above, it is positioned on the post 27 by the positioning section 110 and is energized by the leaf spring 102. Thereafter, in order to press or release the pinch roller 35 against the capstan 34, the end 11 of the pinch roller pressing lever 114 opposite to the abutting portion 114'
4'' is carried out, for example, by a pressing pin 118, which is moved by a drive source such as a plunger or a motor, which is attached to the tape cassette mounting portion 36, although not shown.

Again, when the pinch roller 35 returns to the opening 14 of the tape cassette 8, the rotating arm 90
In the process of rotating in the direction of arrow 96 in FIG.
In the vicinity of the terminal end, as shown by the broken line in FIG. Guide part 111' of holding fitting 111 in
contact portion 1 of the pinch roller pressing lever 114 on the holding fitting 111 as the
14' is broken. In that case, the 11th
Coil spring 117 torsion in the direction of arrow 119 in the figure
(Fig. 10), and in the first relative position, the pinch roller 35 returns to the predetermined position shown in Fig. 9.

It goes without saying that the operation of returning from the second relative position to the first relative position other than the rotary arm 90 described above is performed in the opposite direction to the operation described above.

Further, the tape guide drum 20 is connected to the drum mounting section 4.
The capstan 3 is fixed at the drum mounting part 20'' on the drum fixing part 122 provided at the capstan 3.
4 is supported by a capstan housing 120 having a post 26 erected thereon as shown in FIG. 10, and a capstan motor 121 which is mounted on a drum mounting part 48 and has a flywheel effect is mounted on the upper part. .

Next, the supply or winding of the tape 9 between the first and second relative positions will be explained using FIGS. 10 to 15.

In FIG. 10, a gear 125 is attached to one end of the capstan 34 and protrudes from the back surface of the drum mounting section 48, and the drum mounting section 48 is shown in FIG. 12 and FIG. The shaft 127 is installed in the mounting portion 48 via a boss.
It meshes with a gear 126 that is pivotally supported. In this embodiment, since the capstan 34 rotates at a slight angle with respect to the drum mounting section 48, it is necessary to mesh with the gear 126 supported by a shaft 127 perpendicular to the drum mounting section 48. , gear 125
is a helical gear with a predetermined angle.

In FIGS. 12 and 13, a pulley 128 is integrated with the gear 126, and a belt 129 is stretched between the pulley 130 and the gear 126. The pulley 130, together with the integrated pulley 131,
A shaft 13 fixed to one end of an arm 134 supported by a shaft 132 mounted on the drum mounting section 48
It is pivoted by 3. A belt 145 is stretched between the pulley 131 and the pulley 135, and the pulley 135 is attached to the tape cassette mounting section 3.
The gear 137 rotates integrally with the shaft 137' of a gear 137 held in a housing 136 fixed to the housing 136.
The gear 137 is connected to a shaft 1 mounted on an arm 138 which is pivotally supported by the housing 136 via a boss 139.
It meshes with a gear 141 that rotates around 40. An idler 144 is coaxially provided on the shaft 140 and is pressed by a leaf spring 143 through a felt 142, and prevents the rotation of the gear 141 that meshes with the rotation of the gear 137, thereby causing the arm 138 to rotate. This serves as a force and constitutes a so-called automatic swinging mechanism of the idler 144. As shown in FIGS. 10 and 14, the boss 139 is connected to the slide cam plate 14 which is slidably held on the tape cassette mounting portion 36 by a pin 148.
6 controls its position. The slide cam plate 146 is engaged with one end of a connecting lever 153 which is pivotally supported by a shaft 150 mounted on the tape cassette mounting portion 36 and biased to rotate in the direction of arrow 152 in FIG. 14 by a torsion coil spring 151. By controlling the power supply to a self-keep type plunger solenoid 149 (FIG. 10) fixed to the cassette mounting portion 36, it is movable to the position of the slide cam plate 146 shown by the dashed line in FIG. There is. Then, the cam hole 146' of the slide cam plate 146 engages with the boss 139 that holds the shaft 140 of the idler 144, and the boss 139 is
In this position, the idler 144 is prevented from rotating in the direction of the arrow 147 about the shaft 137' of the gear 137, and the idler 144 is forcibly held in a position where it does not come into contact with either of the reel stands 64, 66.
When the slide cam plate 146 moves to the position shown by the one-dot chain line and the boss 139 relatively comes to position B in FIG. 14, rotation in the direction of arrow 147 is permitted. As shown in FIGS. 10 and 13, the idler 14
4 is in contact with the reel stand 64 or 66, and the capstan motor 1 is also used as a reel drive source.
The driving force of 21 is transmitted by belts 129 and 145, and the reel stand is rotationally driven by a reel drive unit mainly composed of gears 137 and 141, an arm 138, an idler 144, and the like.

Next, the transmission path correction means that transmits the driving force from the capstan motor 121 and moves to the transmission position will be explained with reference to a schematic diagram. 15th
In the figure, there is no problem if the drum mounting section 48 and tape cassette mounting section 36 move between the first and second relative positions as if the pulley 135 is rotating around the pulley 131. 15
The reel stand 64 moves in four directions and maintains a constant relative position with the reel stand 64 or 66, and keeps the so-called biting angle of the idler 144 constant even during movement between the first and second relative positions, thereby making the reel stand 64 stable. , or when trying to measure the transmission of rotational force to 66, slack in the belt 145 corresponding to X in the figure will occur.

Therefore, in this embodiment, FIGS.
As shown in the figure, the belt 14 is placed on the tape cassette mounting portion 36 as it moves between the first and second relative positions.
The above-mentioned shaft 13 is provided with a cam groove 155 corresponding to the slack amount of 5, and is fixed to the drum mounting portion 48.
The pulley 131,
The transmission position of belt 130 is shifted in the direction of arrow 156 in FIG. 13 to keep the tension of belt 145 constant, thereby stably transmitting the reel driving force. In addition,
In this embodiment, the pulley 13 in the direction of arrow 156
Although the tension of the belt 129 changes slightly due to the movement of the belt 129, the change in position of the longitudinal component of the belt 129 in the stretching direction is extremely small and does not cause any substantial problem. It is obvious that if a problem arises, the rotation center of the arm 134 may be configured to coincide with the rotation center of the pulley 128.

With the above configuration, even in the second relative position of the tape cassette mounting part 36 and the drum mounting part 48, which are schematically shown with the tape cassette 8 shown by the dashed line in FIG. At the first relative position schematically shown with the tape cassette 8, and also during the movement process between the second and first relative positions, the power supply control and the plunger solenoid 149 shown in FIG. 10 are performed. By selecting the rotation direction of the capstan motor 121, stable reel driving force can be achieved on the reel stands 64, 66.
It becomes possible to transmit information to either of the following. That is, as shown in FIGS. 10 and 14, power is supplied to the plunger solenoid 149 in the release direction, and the force of the torsion coil spring 151 causes the arrow 1 in the figure to
By rotating in 52 directions, the slide cam plate 1
46 to the position shown by the dashed line, and change the rotating direction of the capstan motor 121 to the 14th position.
By rotating counterclockwise in the figure, the idler 144 can be brought into contact with the reel stand 64, and by selecting the rotation direction clockwise, the idler 144 can be brought into contact with the reel stand 66 and rotated, and the plunger solenoid By supplying power in the suction direction to 149, the idler 144 returns to a position where it does not contact either of the reel stands 64, 66, and at the same time, by interlocking the slide cam plate 146 and the reel brake (not shown), the reel stand This makes it possible to stop the rotation of 64 and 66.

Next, another embodiment of the transmission path correction means will be described using FIG. 16. In principle, the belt 145 in FIG. 12 is eliminated, and the pulley 131 is shown in FIG.
and shows an embodiment in which the pulley 135 is replaced with gears 157 and 158, respectively, in FIG. 15. In FIG. 16, components having the same functions as those shown in FIG. 12 are given the same reference numerals. 1st
In Figure 6, the tape cassette mounting section 36 has a shaft 1.
33 is provided with a cam groove 159 that rotationally guides the gear 158 in the direction of the arrow 160. This shows an embodiment in which the meshing pitch circle of the gear 158 and the gear 157 is always constant, enabling stable transmission of driving force.

FIG. 17 shows another embodiment of the transmission path correction means, and in principle, the pulleys 130 and 131 in FIG. rotate it,
The slack in the belt 162 caused by the movement of the pulley 135 is absorbed by the arm 165, which rotates around a shaft 163 mounted on the tape cassette mounting section 36 and is biased by a spring 164 in the direction of increasing the belt tension. This is an embodiment in which the provided tension roller 166 is used to correct the slack of the belt 162 due to movement between the first and second relative positions, and this also enables stable transmission of driving force. It is what it is. In addition, although the embodiment of the type in which a capstan motor is also used as the reel drive source has been described above, it is obvious that a motor exclusively for the reel may be provided on the drum mounting portion.

Effects of the Invention According to the present invention, in an apparatus for recording and reproducing by positioning a part of the tape guide drum in the opening of a tape cassette, it goes without saying that when a part of the tape guide drum is located in the opening, While reliably collecting the tape into the tape cassette during the process of moving it to the desired position, the device can be made thinner by providing the reel drive source in the drum mounting section. The mounted capstan can also be used as a reel drive source, making it possible to run the tape stably, making it smaller, lighter, and cheaper, and eliminating the need for ultra-thin motors, etc. This makes it possible to reduce power consumption, and furthermore, these
This can be achieved with an extremely simple configuration and can provide extremely large industrial value.

[Brief explanation of drawings]

Fig. 1 is a plan view of a loading mechanism in a conventional VTR, Figs. 2 and 3 are perspective views of a tape cassette applied to the present invention, Fig. 4 is a sectional view thereof, and Figs. 5 to 7 are FIG. 8 is a perspective view of a recording/reproducing apparatus in an embodiment of the present invention; FIG. 8 is a schematic plan view showing a tape running path in the embodiment;
The figure is a schematic plan view of the operating system in the same embodiment, FIG. 10 is an exploded perspective view showing the main structure of the same embodiment, FIG. 11 is a plan view of the same, and FIG. 12 is a schematic developed side view of the same. Fig. 13 is a plan view of the same, Fig. 14 is an exploded perspective view of the same, Fig. 15 is a schematic illustration of the principle, and Fig. 1
Figure 6 is a schematic plan view showing the second embodiment;
The figure is a schematic plan view showing the third embodiment. 8...Tape cassette, 9...Tape, 12,
13... Reel, 14... Opening, 20... Tape guide drum, 22, 24, 25, 27... Post, 30, 31, 32, 33... Inclined post,
35... Pinch roller, 36... Tape cassette mounting section, 48... Drum mounting section, 64, 66...
...Reel stand, 121...Capstan motor,
144...Idler.

Claims (1)

[Scope of Claims] 1. A tape cassette mounting section for mounting a tape cassette having an opening on the front surface on which the tape is stretched; Regarding the relative position of the reel driving section that rotationally drives a reel stand that engages with the reel and the tape cassette mounting section, the tape is stretched over the front surface of the tape cassette placed on the tape cassette mounting section. from a first relative position where a tape guide drum containing a transducer is located on the opposite side of the opening,
The tape guide drum is positioned at a position where the tape enters the opening through the tape from a stretching position of the tape stretched over the front surface of the tape cassette placed on the tape cassette mounting section. a drum mounting section disposed so as to be movable relative to the tape cassette mounting section, a reel drive source placed on the drum mounting section, and transmitting a driving force to a reel driving section, and when the tape cassette mounting section and the drum mounting section move relative to each other between first and second relative positions, the relay transmission position is displaced in accordance with the relative movement; a transmission path correction means for relaying and transmitting the driving force from the reel driving source to the reel driving section; A recording/reproducing device characterized by having a tape winding means. 2. The recording and reproducing apparatus according to claim 1, wherein the reel drive source is simultaneously a capstan drive source. 3. The end of the drive force transmission to the reel drive unit is located on the opposite side of the capstan in the axial direction from the capstan drive source via a tape held and driven by the capstan and the pinch roller. 2. The recording/reproducing device according to item 2.