JPS60163264A - Recording and reproducing device - Google Patents

Abstract

PURPOSE:To reduce the titled device in size and weight and to attain stable tape travelling by using simultaneously a reel driving source as a capstan driving source. CONSTITUTION:A tape cassette 8 is inserted into a cassette holder 16 located at a rise position in the arrow 17 direction. Then the cassette holder 16 incorporating the tape cassette 8 is depressed in the arrow 18 direction. Consequently, the side plate part 10'' of a front cover 10 of the cassette 8 is butted on a cover opening means consisting of a pin, metal plate, etc. and formed on the prescribed position of the device body 15. Then, the cassette holder 16 or a part 15' of the device body 15 is pressed in the arrow 19 direction, so that the device body 15 can be made extremely compact.

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 lanceter, such as in a video tape recorder. , or relates to a recording and reproducing device for reproducing.

Conventional structure and problems In recent years, video tape recorders (
2. Description of the Related Art VTRs (hereinafter referred to as VTRs) are becoming popular, but when considering the use of mobile devices such as portable VTRs outdoors, problems remain not only with the weight but also with the size of the device itself.

Now, the limit on the size of the tape running 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, both are placed at positions separated by a predetermined distance on a plane,
The size is determined by the design of the tape, which is then pulled out from the tape cassette and wound around the tape guide drum.

For example, an example of U loading adopted in a Beta system VTR is schematically shown in FIG. As shown in Figure 1,
A tape cassette 2 is arranged at a predetermined position with respect to a tape guide trim 1. Thereafter, the tape 3' stretched over the front surface of the 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 set rotates in the direction of the arrow 7, and as the ring 6 rotates, the tape 3 is pulled out.
This forms a running system for the tape 3.

In this case, the tape 3 stretched over the front of the tape cassette 2
′ and the tape guide drum 1, the distance β is extremely narrow.
This has the disadvantage that the resulting device is bulky. On the other hand, V
In H3 system, "M loading" adopted in VTR, although it is not shown in the figure, although it is possible to slightly reduce the β value as mentioned above from the tape loading form, If the front tension tape is slack, the tape may come into contact with the tape guide drum, causing damage to the tape.

Therefore, the β value must be a predetermined amount. In this way, 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 β 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 tensioner is inserted into the opening through the tape stretched in front of it, and is separated from the tape on the opposite side by a predetermined distance. A device is shown in which the tape guide drum is mounted at a predetermined height on the tape guide drum that is in the same position, and then the relative position with respect to the tape guide drum is shortened. At this time, when the relative position is shortened, the tape is pulled out from the tape cassette, and the tape is wound around the tape kite drum at a predetermined angle, and when the relative position is widened, the tape guide trim 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 achieved by providing a reel drive unit consisting of a reel drive source (motor) 2 and an idler, etc. that rotates and drives a reel stand that engages with the reel built into the tape cassette on the side where the tape cassette is placed. It becomes possible. However, if a motor that requires high-load torque for fast forwarding or rewinding the tape around a tape guide is installed 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 '-jf, if an ultra-thin motor is used, it will be difficult to obtain the necessary torque with sufficiently low power consumption, so the portable VT, which is characterized by its small size and lightweight maneuverability,
As a result, the problem with R is that the weight of the battery increases and the manufacturing cost increases.

On the other hand, it may be possible to create a reel drive source by devising the placement in the thickness direction and placing the carburetor motor, which normally requires relatively light load torque, on the side where the tape cassette is placed. However, in that case, the capstan will move in a direction that reduces its relative position to the side on which the tape kite drum is placed, and in particular, the capstan will move in a direction that reduces the relative position to the side on which the tape kite drum is placed. This is not a good idea as it requires extremely high precision to ensure relative verticality.

Purpose of the Invention In view of the above-mentioned problems, the present invention has been made to reduce the size of the device while ensuring the collection of the tape into the tape cassette in a recording/playback 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, 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, and a tape cassette mounting section that is mounted on the tape cassette mounting section and that is built in the tape cassette. With regard to the relative position of the IJ, which rotationally drives the reel stand that engages with the tape cassette mounting section, and the tape cassette mounting section, the Open the tape (
'' section, from the first relative position where the tape guide drum containing the transducer is located, the position where the tape is stretched over the front of the chief cassette placed on the tape cassette loading section. At the second relative position 1, where the tape kite drum is located at the position where the tape kite drum enters the opening through the tape, the drum mounting section and the drum mounting section are arranged so as to be movable relative to the tape cassette mounting section. a reel drive source mounted on the 16th section; a transmission path correction means for transmitting driving force from the reel drive source to the reel drive unit and displacing the transmission position in accordance with relative movement between the first and second relative positions; ,
Pull out the tape from the tape cassette, and
The above object is achieved by having a tape pulling means for winding the tape at a predetermined angle around the tape kite drum located at a relative position.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings. FIGS. 2 to 4 show a tape cassette used in a recording/reproducing apparatus according to an embodiment of the present invention. FIG. A pair of reels 12.13
(see Fig. 3) and stretched over the front of the tape cassette 8 (indicated by a dashed line in Fig. 3)
is covered by a front cover 10 and a back cover 11 which cover it by rotation.

FIG. 3 is a perspective view of the tape cassette shown in FIG. 2 when it is reversed 180 degrees, and the bottom surface 8' of the tape cassette 80 has a post or the like inserted inside the tape 9' stretched on the front surface, and the tape cassette 80 is tapered. An opening 14 is provided for pulling out 9'.

When the tape cassette 8 is used in the apparatus of this embodiment, the front cover 1o can be completely opened by a cover opening means (not shown) provided in the apparatus, as shown in the partial 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. One end of the tape 9 is guided by 14" and rotated, resulting in the tape 9 being wound on a reel 12.13.
It is released along a predetermined trajectory shown by the dashed line in FIG. 4 without coming into contact with the tape 9' stretched on the front side.

On the other hand, the opening 14tj shown in FIG. 3 is fully opened to a height corresponding to the thickness of the tape cassette 8,
A tape kite drum 20 that incorporates a transducer such as a post (not shown) or a magnetic head, which will be described later.
(See Figure 8).

Figures 6 and 7 show a main body device 1 in an embodiment of the present invention.
5 is a perspective view showing the external appearance of the tape cassette 5 and an example of the mounting operation of the tape cassette 8. FIG.

As shown in Figure 6, insert the tape cassette 8 in the direction of the arrow 1 into the cassette holder 16 in the raised position (so that the tape 9' stretched on the front is at the front in the insertion direction). . After that, as shown in FIG. 6, the tape cassette 8
Push away the cassette holder 16 containing the cassette holder 16 in the direction of the arrow 18. Since this function is employed in well-known equipment, a detailed explanation of the illustrated configuration will not be provided.

Then, by the above-mentioned operation, the tape cassette 8 is transferred to the main unit 15.
0 A lid opening means such as a bottle or a sheet metal provided at a predetermined position comes into contact with the side plate portion 1o'' of the front lid 10 (see FIG. 3).Then, the front lid 10 and the back lid 11 of the tape cassette 8 At the same time as the release, pinch rollers 35, posts, etc. (22, 24,
25° 27.30, 31.32.33) is the opening 14 of the tape 9' stretched over the front surface of the tape cassette 8.
It can be inserted into.

It should be noted here that the tape cassette 8 is installed at a position separated by a predetermined distance 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, from the state shown in FIG. 6, the cassette holder 16 or a part 16' of the main unit 15 can be pushed in the direction of the arrow 19, or it can be moved automatically by a drive source such as a motor as described later. According to
As a result, the main body 15 of the apparatus becomes extremely compact as shown in FIG.

Next, using FIG. 8, the running path of the tape 9 is finally formed and the transducer, for example, a tape guide drum 20 containing a built-in magnetic head (not shown) in a VTR.
and the phase τ1 position of the tape cassette 8 (which corresponds to the second relative position described below) will be fully explained.

The tape 9, whose starting and ending ends are connected to the Zaburi and pick-up reels 12 and 13 built into the 4th Chive force set 1-8, is supplied from the Zaburi reel 12 and can be rotated or fixed to obtain a predetermined wrapping angle. The posts 21, 22, 23, 24, 26, 26, 27, 28 and the erase head 29, which are provided perpendicularly to the running direction of the tape 9, and also to the posts 21. inclined boss inclined in direction and angle)
Its traveling position is guided at 30°31, 32, and 33.

The tape runs along a lead portion 20' (FIG. 10) that is inclined at a predetermined angle on the outer periphery of the kite drum 20, and its winding is regulated by inclined bosses 31 and 32. The constant speed running of the tape 9 is perpendicular to the running direction of the tape 9.

The capstan 34 and the pinch roller 36 rotate while holding the tape 9 in the axial direction thereof.

Now, the relative positional relationship between the tape guide drum 2o and the tape force set 1-8 is such that when the tape kite drum 20 is stretched over the front surface of the tape cassette 8 and the tape 9' is stretched, the tape 9' is stretched further through the tape 9. The positional relationship is such that the tape cassette 8 enters into the open portion 14 of the tape cassette 8.

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

In FIG. 10, the state of the cassette holder 16 shown in FIG. 6 already described, that is, the state where the tape cassette 8 can be inserted into the cassette holder 16 is shown by a solid line. ! The state shown in FIG. 6, that is, the cassette holder 16
The positional state when the tape cassette 8 is installed inside and pushed down in the direction of the tape cassette mounting section 36 on which the tape cassette 8 is mounted is shown by the dashed line.

First, the cassette holder 16 is attached to the tape cassette mounting section 36.
The fulcrum holding part 3 provided on the side plates 37 and 38 fixed to the
9. and 1' and 71 by the kite hole 4o, respectively.
The cassette holder is raised and lowered using a so-called This is what was adopted. Upper part of rice cassette holder 16 1. The force is provided by a tension spring 45. Incidentally, although not shown in the drawings, the side plate 37 is also formed with a similar xIJing type means. Furthermore, since the means for locking the tape cassette mounting portion 36 of the cassette holder 16 can be achieved by a well-known method, explanations using illustrations will be omitted.

In this way, by pressing down the cassette holder 16, the height regulating bins 46, 45' and the height regulating bin 47 are positioned on the tape cassette mounting section 36.
A tape cassette 8 indicated by a dashed line above is fixed at a predetermined height. As already mentioned using the cut out Figure 4,
In the process of this pushing down operation, the tape cassette mounting section 36
A bottle (not shown) is provided so as to come into contact with the lower surface 8' of the tape cassette 8 on the side plate 10'' of the front cover 10.
The front cover 1o and the back cover 11 of the tape cassette 8 are opened as shown in FIG.
5.27, inclined post 30°31.32.33, and pinch roller 36 are inserted. When this insertion is completed, that is, as shown in FIG. 10, the tape cassette 8 is mounted on the tape cassette mounting section 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 separated by a predetermined distance L (see FIG. 9). (The relative position between the tape cassette mounting section 36 and the drum mounting section 48 in this state is hereinafter referred to as a first relative position.) From this first relative position, the tape kite drum 20 shown in FIG. is opened 1]" The position where the tape 9 completes its entry into the B14 and completes the formation of a constant running system of 19i, that is, the tape cassette mounting portion 36 and the drum mounting portion 1.
The relative position with respect to the IT part 48 (portion in FIG. 10) and the position shown by the pinching are hereinafter referred to as the second position. The process leading to () 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 the figure, the pinion rotates by being supported by a shaft 51 mounted on a halter 49 that is fixed to the drum mounting section 48 with a screw 60, and also engages with the rack section 36' of the tape cassette mounting section 36. 62 and the drive gear 66 mesh and rotate, the guide rollers 53 provided on both sides of the drum mounting section 48 are guided and held by the elongated hole section 54, and the tape cassette mounting section 36 moves in the direction of the arrow 55. This is done by moving in the direction.

An elongated hole 66'' is provided in the disk portion 66' that is integrated with the spun drive gear 56. A bottle 68, which is set up on the worm wheel 57, is inserted into this elongated hole 66''. , the rotational force of the Warno wheel 5a is transmitted via the tension spring 59. A small worm wheel 57 is engaged with a worm 61 fixed to a motor 60 fixed to the holder 49. Note that after the tape cassette mounting portion 36 reaches the second relative position, by further rotating the arm wheel 57 against the tension spring 59, both sides of the tape guide drum 2o (the boss 24, which moves to 1111, The tension springs 59 play the role of fixedly biasing the V-stoppers 62 and 63 of the V-stoppers 62 and 63, respectively.

Next, the posts 2 move to both sides of the tape guide drum 20.
4.25 and the loading operation of the inclined post 31, 32 will be explained. First, a post 31 inclined at 24 degrees is installed on the slide board 66 on the side of the supply reel stand 64 that engages with the supply reel 12 (FIG. 9). On the other hand, a post 25 and an inclined post 32 are installed on the slide boat 67 on the side of the pick-up reel stand 66 that engages with the pick-up reel 13 (FIG. 9).

One end is provided at the drum mounting portion 48, the other end is provided at the end of movement of the slide boats 65, 67, and is fixed to V stoppers 62, 63 for positioning the posts 24, 25, respectively, as shown in FIG. Slide guide 68.
69 so as to be slidably movable. A suppression lever 70 is provided at the rear end of each slide bow 1-65 and 67.
．． 71 is held, and the pressing lever 70. The other end of the rotary arm 74.73 is rotatably supported by a support shaft 72.73 installed on the drum mounting portion 48, and has a rotating arm 74.73 having gear portions 74' and 75'Q.
It is rotatably engaged with the tip of 75. Then, as the tape cassette mounting section 36 moves in the direction of the arrow 55, the tape cassette mounting section f! Gear part 7 of rotating arm 74.76 meshing with rack part 76.77 provided on A36
4', 75' rotate, and the pivot arms 74, 75 pivot in the directions of arrows 78, 79, respectively. Due to this rotation, the slide bow) 65.67 becomes the slide guide 68.69.
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 2°. Eventually V stopper 62
．． After the slide boats 65 and 67 arrive at 63, the tape cassette mounting section 36 is moved by the tension spring 59 stretched between the disk portion 56' of the drive gear 56 and the worm wheel 67 as described above. is energized in the direction of arrow 55, and ■
Slide boat 66.6 against stopper 62°63
This makes it possible to more securely fix the troops at the end. Furthermore, as shown in FIG. 9, there are a boss 232 and an erase head 29 on the movement path of the slide boat 65 on the side of the supply reel stand 64.
(shown by broken lines in Figs. 9 and 10), but as shown in Fig. 10,
One end 81' of the arm 82, one end of which is inserted in
is energized in the direction of Its rotation position is regulated by arm 8.
This is done by the second locking protrusion 82' and the V stopper 62 coming into contact (see FIG. 9). The erase head 29 is rotatably supported by a shaft 23' of the post 23, and is attached to a mounting lever 86 biased in the direction of an arrow 86 by a torsion coil spring 84. Then, as shown in FIG. 9, the slide boat 65 is connected to the V stopper 62.
When the front end 65a of the slide board 66 comes into contact with the end of the arm 82, the arm 82 twists in the direction of the arrow 87 and rotates against the biasing force of the coil spring 81.

Next, the flange portion of the post 24 and the erase head 29 come into contact with each other, and the erase head 29 twists in the direction of the arrow 88 using the post 23 as a support shaft and rotates against the applied force of the coil bypass 84. Therefore, the boss 24 reaches the V stopper 62. When the boss 24 reaches the V stopper 62, the arm 82 and erase head 29 are moved by the torsional recoil spring 8.
Return to original position with 1.84 affiliated forces. It goes without saying that when the slide board 66 returns to the opening 14 of the tape cassette 8 for unloading, the erase head 29 and post 23 rotate 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 rotating arm 9o that erects the post 27 and the inclined post 33 and holds the pinch roller 36.
The operation will be explained.

The mass rotating arms 89 and 90 are pivotally supported by respective support shafts 91 and 92 set on the drum mounting section 48, and one end is fully engaged with the bins &-3 and 94 on the drum mounting section 48, respectively. , the other end is respectively locked to a rotating arm 89,90,
They are biased by respective torsion coil springs 97°98 which bias in the direction of arrows 95 and 96, respectively. In the first relative position, the rotating position force is restricted by contact with the bins 99, 100 set up on the Ni drum mounting portion 48. Further, arm drive contact parts 103 and 104 to which plate springs 101 and 102 are fixed in correspondence with the rotary arms 89 and 90 are mounted on the tape cassette mounting part 36.
．． 90 at a predetermined pressure distance. And the first
In the process of moving from the relative position of 1 to the second relative position, the slide boards 65.67 take the lead, and the slide boards 65. 67 and the movement timings of the respective rotating arms 89 and 90 are set. The rotating arms 89 and 90 first contact the arm driving contact portions 103 and 104, and then the torsion coil springs 97.
98, the post 22. The inclined post 30 follows the trajectory in the direction of arrows 105 and 106 in FIG. 8. Rotate the top of 69 respectively. As for the rotating arm 89, the rotating arm 90 is attached to the post 22 by the positioning section 109.
are positioned by the positioning section 110 on the post 27, biased by leaf springs 101 and 102, respectively (see Figure 11). Furthermore, the suppression of the pinch roller 35 held by the C1 rotating arm 90 and its movement process will be explained with reference to FIGS. 10 and 11. As shown in FIG. The second shaft part is rotatably supported by a holding fitting 111 that supports the top and bottom.Also, an 11 dome coil spring 117 is attached at one end to the inclined post 33 and at the other end to the holding fitting 111. In the first relative position shown in FIG. 69', and the position is controlled so that when the tape cassette 8 is attached to the tape cassette mounting part 36, it is inserted securely into the opening 14 (see FIG. 9). A pinch roller-suppressing lever 114 having a rotation fulcrum 113 is placed thereon, and is biased to rotate clockwise when viewed from the top in the figure by a leaf spring 116 provided at its center.

The rotation position is the bottle 11 planted on the rotation arm 90.
It is regulated by 6. In the process of moving from the first relative position to the second relative position, the rotating arm 90
is rotated as the arm drive contact portion 104 moves in the direction of arrow 55 in FIGS. 11 and 10,
Separate the part of the slide guide 69 from the collar 69',
The pinch roller 36 is rotated in the direction of the arrow 112 by the torsion coil spring 117.

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, the positioning part 11
0, it is positioned on the post 27 and biased by the leaf spring 102. Then pinch roller-35
In order to suppress or release the tape from the capstan 34, the entire end 114' of the pinch roller pressing lever 114 opposite to the abutting part 114' is attached to the tape cassette mounting part 36. The suppression bottle 11 is moved by a driving source such as a plunger or a motor.
8.

Again, when the pinch roller 35 returns to the opening 14 of the tape cassette 8, the pinch roller-pressing lever 114 is initially moved in the process in which the rotating arm 9° rotates in the direction of the arrow 96 in FIG. It rotates while abutting the abutting portion 114', and near the end, as shown by the broken line in FIG. -35 is in contact with the kite portion 111' of the holding fitting 111, and as the holding fitting 111 moves, contact with the abutting portion 114' of the pinch roller-pressing lever 114 at the holding fitting 111 is cut off. At that time, it rotates in the direction of arrow 119 in FIG. 11 against the torsion coil spring 117 (FIG. 10),
In the first relative position, the pinch roller 35 returns to the predetermined position shown in FIG.

Note that the return operation from the second relative position to the first relative position other than the rotary arm 90 described above is not necessarily performed in the opposite direction to the previously described operation.

Further, the tape kite drum 20 can be identified at the drum mounting part 20 on the drum fixing part 122 provided on the drum mounting part 48. The capstan 34 is as shown in FIG.
A capstan motor 121 is supported by a capstan housing 120 having a post 26 erected thereon, and is mounted on the drum mounting portion 48 and has a flywheel effect t'1Jif+ attached to the top.

Next, the supply or winding of the tape 9 between the first and second relative positions will be explained using FIGS. 10 to 16.

In FIG. 10, one end of the capstan 34 is equipped with a gear 1.
25 is attached and protrudes from the back surface of the drum mounting section 48,
As shown in FIGS. 12 and 13, which are schematic exploded views for ease of understanding, the gear 126 is engaged with a gear 126 that is supported by a shaft 127 that is installed on the drum mounting portion 48 via a boss. . In this embodiment, since the capstan 34 rotates at a slight inclination with respect to the tome mounting section 48, the shaft 127 perpendicular to the drum mounting section 48 rotates.
The gear 125 is a helical gear with a predetermined angle in order to mesh with the gear 126 that can support 111.

In FIGS. 12 and 13, a pulley 128 is integrated with the gear 126, and a bell l-129 is connected to the pulley 130.
is bridged between. The pulley 130, together with the integrated boolean IJ'-131, is mounted on the drum 16 section 4B [
It is pivotally supported by a shaft 133 fixed to one end of an arm 134 which is pivotally supported by an erected shaft 132. A belt 145 is stretched between the pulley 131 and the pulley 136, and the pulley 135 is connected to the gear 1 held in the housing 136 identified on the tape cassette mounting section 36.
37 and rotates integrally with the shaft portion 137'. gear 137
is engaged with a gear 141 that rotates around a shaft 140 that is mounted on an arm 138 that is pivotally supported by a housing 136 via a boss 139. Felt 142 is attached to the shaft 140.
Idler 14 is pressed by leaf spring 143 via
4 is provided coaxially, and completely prevents the rotation of the gear 141 that meshes with the rotation of the gear 1370, resulting in a force that rotates the arm 138, forming a so-called automatic swinging mechanism of the idler 144. The boss 139 is connected to the tape cassette mounting portion 3 as shown in FIGS. 10 and 14.
6 [The position is controlled by a slide cam plate 146 which is slidably held by a bin 148.

The slide cam plate 146 is pivotally supported by a shaft 150 mounted on the tape cassette mounting portion 36, and engaged with one end of a connecting lever 153 which is biased to rotate in the direction of arrow 152 in FIG. 14 by a torsion coil spring 161. By controlling the power supply to a self-keep type planshaun renoid 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. 14. It is being 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 when the boss 139 is in position A in FIG. Rotation in the direction of arrow 14 is prevented and the idler 14
4 is a reel stand 64. However, when the slide cam plate 146 moves to the position shown by the dashed-dotted line and the boss 139 relatively comes to position B in FIG. 14, it moves in the direction of arrow 147. Rotation is allowed. And Figure 10.

As shown in Figure i13, the idler 144 comes into contact with the reel stand 64 or 66, and the driving force of the capstan motor 121, which also serves as a reel drive source, is transferred to the bell l-129.
, 14s, and the reel stand is rotationally driven by a reel driver mainly composed of gears 137, 141, an arm 138, an idler 144, and the like.

Next, the transmission path correction means for transmitting the driving force from the capstan motor 121 and displacing the transmission position will be explained with reference to a schematic diagram. In FIG. 15, as the pulley 135 rotates around the I1 boo IJ-131,
There is no problem if the drum mounting section 48 and the tape cassette mounting section 6 move between the first and second relative positions, but if they move in the direction of arrow 154 in the figure and change their relative position with the reel stand 64 or 66. Keep it constant1. 1st. In order to maintain the so-called biting angle of the idler 1440 constant during movement between the second relative positions and to stably transmit rotational force to the reel stand 64 or 66, the belt corresponding to X in the figure is used. 145 slack will occur.

Therefore, in this embodiment, as shown in FIGS. 10 and 13, a cam is provided on the tape cassette mounting portion 36, which corresponds to the amount of slack in the belt 145 as it moves between the first and second relative positions. The arm 13 is provided with a groove 166 and rotates around the aforementioned shaft 132' fixed to the drum mounting portion 48.
By engaging the shaft 133 that is set up at
This is to keep the tension of the belt 146 constant and to stably transmit the reel driving force. Note that in this embodiment, the tension of the belt 129 changes slightly due to movement of the pulley 130 in the direction of arrow 156;
The amount of displacement in the longitudinal direction component of the belt 129 in the stretching direction is extremely small and causes no substantial problem. It is obvious that if a problem were to arise, the center of rotation of the arm 134 could be configured to coincide with the center of rotation of the boot IJ-128.

With the above configuration, the tape cassette mounting portion 3 schematically illustrated by the tape cassette 8 indicated by the dashed line in FIG.
Also at the second relative position between 6 and the drum mounting section 48,
Further, even at the first relative position schematically shown by the tape cassette 8 shown by the solid line, the second cassette. During the movement process between the first relative positions, power supply control to the plunger solenoid 149 shown in FIG.
By selecting the rotational direction of the stun motor 121, stable reel driving force can be transmitted to either of the reel stands 64, 66. That is, Fig. 10, 1st
As shown in Figure 4, electric power is supplied to the planshaun lens 149 in the release direction, and the force of the torsion coil spring 151 causes the slide cam plate 146 to rotate in the direction of arrow 152 in the figure, thereby moving the entire slide cam plate 146 to position 1 shown by the dashed line. let me,
By rotating the rotation direction of the capstan motor 121 counterclockwise in FIG. 14, the idler 144 is brought into contact with the reel stand 64, and by selecting the rotation direction in the special training direction, the idler 144 is brought into contact with the reel stand 66. It becomes possible to rotate the reel, and by supplying power in the suction direction to the planshaun renoid 149, it is returned to a position where it does not come into contact with either the idler 144 or the reel stand 64, 66, and at the same time it slides (not shown). By interlocking the cam plate 146 and the reel brake, it is possible to stop the rotation of the reel stands 64, 66.

Next, another embodiment of the transmission path correction means will be described using FIG. 16. In principle, FIG. 16 eliminates the belt 146 in FIG.
This shows an embodiment in which gears 35 are replaced with gears 157 and 158, respectively, in FIG. 15. Components in FIG. 16 that have the same functions as those shown in FIG. 12 are given the same reference numerals. In FIG. 16, the tape cassette mounting section 36 has a shaft 133.
cam groove 159 for rotationally guiding movement in the direction of arrow 160.
is provided, so that the meshing pitch circle of the gears 158 and 157 is always constant as the rotation center of the gear 158 moves from the rotation center C of the gear 168 at the first relative position to the rotation center of the gear 158 at the second relative position. This shows an embodiment that enables stable transmission of driving force.

FIG. 17 shows another embodiment of the transmission path correction means, and in principle, the boos IJ-130 and 131 in FIG. The slack in the belt 162 due to the movement of the pulley 135 is removed by
An arm 166 rotates around a shaft 163 installed at
A tension roller 166 provided above causes the first. This embodiment attempts to correct the slack of the belt 162 due to movement between the second relative positions, and this also enables stable transmission of driving force.

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 part of a tape cassette, when a part of the tape guide drum is located in the opening part 1', it is a hot topic. In addition, the tape can be reliably collected into the tape cassette even during the process of moving the tape to a position where it cannot be moved, and by providing the reel drive source in the drum mounting section, it is possible to make the device thinner. The capstan placed on the loading section can also be used as a reel drive source, making it possible to run the tape stably, making it smaller, lighter, and cheaper, and using an ultra-thin motor. It is possible to reduce power consumption by eliminating the need for the above, and furthermore, it is possible to achieve these with an extremely simple configuration, which can provide extremely large industrial value.

[Brief explanation of the drawing]

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 Recording and reproducing device 6 in one embodiment of the present invention. strabismus 1 bacteria,
FIG. 8 is a schematic plan view showing a tape running path in the same embodiment, FIG. 9 is a schematic plan view of an operating path in the same embodiment, and FIG. 10 is a main part configuration of the same embodiment. 11 is a plan view of the same, FIG. 12 is a schematic developed side view of the same, FIG. 13 is a plan view of the same, and FIG. 14 is an exploded perspective view of the same (
9), FIG. 16 is a schematic diagram for explaining the principle, FIG. 16 is a schematic plan view showing the second embodiment, and FIG. 1T is a schematic plan view showing the third embodiment. 8... Tape cassette, 9 Mountain... Tape, 1
2゜13...Reel, 14...River/Opening M, 2
0. River... tape guide drum, 22.24.25.2
7. River/Post, 30, 31. 32. 33...
・Slanted post, 35...Pinch roller-136
・Mountain: Tape cassette placement section, 48...Drum placement section, 64.66...Reel stand, 121.
... Capstan motor, 144 ... Idler. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2 Figure 3 (2) Figure 4 Figure 11 ++<) Figure 12 Figure 13 Figure 14B4 f4'1 Figure 15 Figure 16

Claims (3)

[Claims] (1) A tape cassette mounting section on which a tape cassette (having an opening on the front surface on which the tape is stretched) is mounted, which is placed on the tape cassette mounting section and engaged with a reel built into the tape cassette. With regard to the relative position of the reel drive unit that rotationally drives the reel stand and the tape cassette mounting unit, the 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 kite drum is arranged to be movable relative to the tape cassette mounting portion to a second relative position where the tape kite drum is located at a position where the tape kite drum enters the opening through the tape than the stretching position of the tape kite drum. a drum mounting section, a reel drive source placed on the drum mounting section, a driving force transmitted from the reel drive source to the reel drive section, and a drive force being transmitted to the reel drive section in response to relative movement between first and second relative positions. transmission path correction means for displacing the transmission position;
A recording/reproducing apparatus characterized by having a tape pulling means for winding the tape at a predetermined angle around the tape guide drum located at a relative position. (2) The recording/reproducing apparatus according to claim 1, wherein the reel drive source is also a capstan drive source. (3) The end of the driving force transmission to the reel drive section is located on the opposite side of the capstan in the axial direction via a tape that is pinched and driven by the capstan and the pinch roller. The recording/reproducing device described in Section 1.