JP2920964B2 - Rotating head type recording / reproducing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention will be described in the following order.

A. Industrial application fields B. Summary of the invention C. Prior art D. Problems to be solved by the invention E. Means to solve the problems F. Function G. Embodiment G _1. Configuration of embodiment G ₂ H. Effects of the Invention H. Effects of the Invention A. Industrial Field of the Invention The present invention relates to a so-called linear skate type rotary head type recording / reproducing apparatus suitable for use in, for example, PCM recording of video signals.

B. Summary of the Invention The present invention includes a first chassis having a reel base on which a tape cassette is mounted and a tape guide erected at a predetermined position corresponding to an opening of the mounted tape cassette, and at least a rotating head drum. A rotatable second chassis is disposed so as to be relatively movable, and the two chassis move relative to each other so that the tape exposed from the opening of the tape cassette is transferred to the rotary head drum via the tape guide. A rotary head type recording / reproducing apparatus configured to perform loading and unloading, wherein a drive source for relatively moving the two chassis is provided on one of the first and second chassis, and the loading is completed. Immediately before pressing the second chassis away from the first chassis and loading At least one of the chassis is provided with a pressing means for returning to the original position substantially at the same time as the completion of the clipping, and a tape tension adjusting mechanism and a pinch roller pressing mechanism are provided on one of the chassis, respectively. Is operated so as to operate by the above-mentioned loading and not to operate by the above-mentioned unloading, so that the whole apparatus can be downsized with a simple structure, and the loading and unloading can be performed by one driving source. In addition to the operation, switching between operation and non-operation of the tape tension adjusting mechanism and the pinch roller pressing mechanism is performed in conjunction with the operation.

C. Prior Art The present applicant has proposed a rotary head type recording / reproducing apparatus suitable for use, for example, in PCM recording of a video signal.
Filed under No. 665. This will be described in detail with reference to FIGS. 13 and 14. Reference numeral 100 denotes a rotary head type recording / reproducing apparatus, and a pair of reel bases 102, 1 on which a tape cassette 101 is mounted.
02, and a pair of tape guides 103, 10 at a position corresponding to the opening 101a of the mounted tape cassette 101.
4 has a first chassis 110 on which the rotary head drum 105 is erected, and a second chassis 120 on which a rotary head drum 105 is rotatably arranged at the center. A pair of guide grooves 111, 111 are formed on both sides of the first chassis 110, respectively, and a pair of pins 121, 121 erected on the second chassis 120 are inserted into the pair of guide grooves 111, 111. . A rack 112 is fixed to one end of the first chassis 110, and meshes with a gear 122 of a motor fixed to the second chassis 120, so that the first chassis 110 2 chassis 1
20 is reciprocally movable below the first chassis 110. The reciprocating movement of the second chassis 120 causes the tape 106 exposed from the opening 101a of the tape cassette 101 to be loaded and unloaded onto the rotary head drum 105 via the pair of tape guides 103 and 104. I have.

In the drawings, reference numeral 130 denotes a pinch roller of a pinch roller press-fitting mechanism, 140 denotes a capstan, and 150 denotes a tape guide of a tape tension adjusting mechanism.

For example, in the case of recording a video signal by PCM, since the compression and expansion of the time axis and the division of the signal can be easily performed, the tape 106 is attached to the rotating head drum 105 by 180 degrees or more like a conventional so-called analog VTR. It is not necessary that the recording and reproduction be performed continuously by each head.

D. Problems to be Solved by the Invention In the rotating head type recording and reproducing apparatus 100 of the prior art,
The loading and unloading operations and the switching between the operation and non-operation of the pinch roller pressing mechanism and the tape tension adjusting mechanism are attempted to be performed using a cam or the like (not shown). There was a drawback that the entire apparatus became complicated and large. Also,
There is a disadvantage that the number of parts increases and the cost increases accordingly.

In view of the above, the present invention provides a simple structure for loading and unloading operations, and in conjunction therewith, the tape tension adjusting mechanism and the pinch roller pressing mechanism operate and non-operate, and the overall size of the apparatus can be further reduced. It is an object of the present invention to provide a rotary head type recording / reproducing device which can be used.

E. Means for Solving the Problems A first chassis having a reel base on which a tape cassette is mounted and having a tape guide erected at a predetermined position corresponding to an opening of the mounted tape cassette, and at least a rotating head drum. A rotatable second chassis is disposed so as to be relatively movable, and the two chassis move relative to each other so that the tape exposed from the opening of the tape cassette is transferred to the rotary head drum via the tape guide. A rotary head type recording / reproducing apparatus for loading and unloading, wherein a drive source for relatively moving the two chassis is provided in one of the first and second chassis, and the loading is completed. Immediately before pressing the second chassis away from the first chassis and loading At least one of the chassis is provided with a pressing means for returning to the original position substantially at the same time as the completion of the clipping, and a tape tension adjusting mechanism and a pinch roller pressing mechanism are provided on one of the chassis, respectively. Are switched so as to operate by the loading and not to operate by the unloading.

F. Operation When the drive source is driven, the first and second chassis move relatively. The tape tension adjusting mechanism and the pinch roller pressing mechanism are linked by the relative movement of these two chassis. As a result, the loading and unloading operations of the tape are performed, and the tape tension adjusting mechanism and the pinch roller pressing mechanism operate by the loading.
It switches so that it does not operate by unloading.
Then, the pressing means presses the second chassis downward so as to separate from the first chassis until immediately before the completion of the loading, and returns to the original position almost simultaneously with the completion of the loading. Prevents the lower edge from climbing over and damaging the tape. Therefore, a complicated mechanism such as a cam for operating the tape tension mechanism and the pinch roller pressing mechanism is not required, and the entire apparatus can be simplified, downsized, and reduced in cost.

G. Embodiment Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

G _1. Configuration of the embodiment In FIG. 1, reference numeral 1 denotes a rotary head type recording / reproducing apparatus, which has a pair of reel bases 11, 11 on the upper surface side of which a tape cassette 2 is mounted.
A first chassis 10 provided with a vertical tape guide 13 and an inclined tape guide 14 via respective bases 12 at positions corresponding to both sides of the opening 2a of the first chassis 10 and a predetermined interval below the first chassis 10. A capstan motor that rotatably supports a rotary head drum 22 via a base 21 at the center and has a capstan 23 erected on the right side in FIG.
And a second chassis 20 to which the base 24 is attached via a base 24a.

On the front side (upper side in FIG. 1) of the first chassis 10,
Notches 10a, 10b, and 10c are formed for the rotary head drum 22, the capstan 23, and a tape guide 51 of a tape tension adjusting mechanism 50 to be described later, respectively, and both sides near the pair of reel stands 11, 11 are formed. Is a pair of guide grooves 10
d and 10d are formed. A pair of pins 25, 25 erected on the second chassis 20 are inserted through the pair of guide grooves 10d, 10d, respectively. A pair of guide grooves 20d, 20d are formed on both sides of the second chassis 20. A pair of pins 15, 15 projecting downward from the first chassis 10 are inserted into the pair of guide grooves 20d, 20d, respectively. With these, the second chassis is
The chassis 20 reciprocates in a predetermined strolling front-rear direction. Further, a motor (drive source) 16 having a gear 17 that rotates by meshing with a gear (not shown) of the rotating shaft 16a is mounted on the left side of the first chassis 10 in the drawing.

Further, below the first chassis 10, there is provided a pinch roller pressing mechanism 30 for pressing and releasing a pinch roller 38 described later on the capstan 23. The pinch roller pressing mechanism 30 includes an operating arm 31 having a locking portion 31a at the distal end, a long hole 31c formed at a base end 31b, and a substantially central portion pivotally supported by a shaft 32 so as to be swingable. Actuating arm
A tension coil spring 33 for pulling a base end 31b of the base 31 toward the rear side (lower side in FIG. 1) of the chassis 10, and a first end 34a of the first arm 1
A pin 35 inserted into the long hole 10e is erected, and a substantially L-shaped connecting arm 34 that rotatably supports a base end 34b via a shaft 36, and a pinch roller 38 at a distal end 37a. And an L-shaped roller support arm 37 whose center is swingably supported via the shaft 36, and a base between the distal end 34a of the connection arm 34 and the roller support arm 37. A tension coil spring 39 is interposed between the end portions 37b and constantly urges the pinch roller 38 toward the capstan 23 side.

On the left side in the figure above the second chassis 20, a slider 41 to which a rack 40 meshing with the gear 17 of the motor 16 is fixed slidably in the front-rear direction. A pair of long holes 41a, 41a formed before and after the center of the slider 41
A pair of pins 26, 2 erected on the second chassis 20;
6 is inserted. Thus, the slider 41 slides on the second chassis 20 in a predetermined stroke longitudinal direction. Also this slider
41 is a pin 27 having one end erected on the second chassis 20.
, And the other end is always pulled toward the front side (upper side in FIG. 1) of the chassis 20 by a tension coil spring 42 locked at a substantially central portion of the slider 41. Further, a locking piece 43 is fixedly provided on the end surface 41b side of the slider 41. The locking piece 43 is fixed on the second chassis 20 via the base 28, and is locked to the leaf spring 29 having a distal end.
Accordingly, the slider 41 is moved in a state where the distal end surface 41b of the slider 41 comes into contact with a tape guide 51 of a tape tension adjusting mechanism 50, which will be described later, which projects to the front side of the second chassis 20.
Is temporarily fixed on the second chassis 20 by the elastic force of the leaf spring 29. Further, an upright portion 41c is formed integrally with the slider 41 at a position opposed to the locking portion 31a of the operation arm 31 at a central portion of the slider 41 so as to protrude.

Thus, a tape tension adjusting mechanism 50 for adjusting the tension of the tape 3 is provided in front of the lower surface of the second chassis 20. This tape tension adjusting mechanism 50
Is formed through the slot 20 e of the second chassis 20.
0 Tape guide 51 projecting upward and abutting on the tape 3
The tape guide 51 protrudes from the distal end 52a, and the shaft 53 protrudes from the base 52b to the lower side of the second chassis 20.
A tension arm 52 rotatably supported via
One end is locked to the center of the tension arm 52, and the other end is locked to the second chassis 20 to constantly urge the tape guide 51 so as to abut the distal end surface 41b of the slider 41. A tension coil spring 54 and a tension arm 52 projecting from the lower surface of the second chassis 20 are provided.
And a regulating pin 55 for regulating the clockwise rotational position of the motor.

In addition, at positions corresponding to the corners of the pieces 10A and 10B between the notch 10b and the notch 10a and between the notch 10a and the notch 10c of the first chassis 10 at the front edge of the upper surface of the second chassis 20. ,
The first chassis 10 when the loading of the tape 3 is completed.
A pair of positioning blocks (positioning means) 60, 60 for determining a vertical position between the first chassis 20 and the second chassis 20, respectively, are protrudingly provided. As shown in FIGS. 7 to 10, the positioning blocks 60 are opposed to each other in an inverted L-shape, and the first chassis 10 has a hook 60b having a tapered surface 60a at each end thereof.
Press each corner of each piece 10A, 10B downward to
The vertical positioning of the chassis 10 is performed. Further, a substantially V-shaped block-shaped stopper 61 is fixed on the lower left side of the first chassis 10, and a positioning pin 62 is provided on the upper left side of the second chassis 20 to contact the stopper 61. I have. Thereby, the positioning of the first chassis 10 and the second chassis 20 in the front-rear direction when the loading of the tape 3 is completed is performed.

A concave portion 10f having a tapered surface is formed at a position substantially corresponding to each vertical tape guide 13 on the lower surface of each piece 10A, 10B of the first chassis 10. On the second chassis 20 facing each of the recesses 10f, ninth and tenth
As shown in the figure, a pressing rod (pressing means) 70 is provided to push down the rotary head drum 22 side of the second chassis 20 until just before the loading of the tape 3 is completed, and to return to the original position when the loading is completed. I have. That is, as shown in FIG. 9, each of the pressing rods 70 is in contact with each one of the first chassis 10 until the loading is completed.
By contacting the lower surfaces of 10A and 10B, the second chassis 2
The second chassis 2 is slightly deformed downward by its elasticity.
The rotating head drum 22 attached to the cylinder 0 is lowered. As shown in FIG. 10, when the pressing rods 70 are received in the recesses 10f of the pieces 10A and 10B immediately before the completion of the loading, the rotary head drum 22 side of the second chassis 20 returns to the original position. Return to position. As a result, as shown in FIG.
The lower edge 3a of the tape 3 is lower than the lead 22a (shown by a dashed line in FIG. 11) of the tape 22, and the lead 22a (11th
(Indicated by a solid line in the figure), the lower edge 3a of the tape 3 is raised. The rigidity of the second chassis 20 is the first
The rigidity of the chassis 10 is slightly lower than the rigidity of the chassis 10.

Further, a plurality of rectangular metal plate contacts 80 connected to the capstan motor 24 via the wire 8 are fixed on the base portion 24a of the capstan motor 24 mounted on the second chassis 20. I have. Also, each of these contacts
A plurality of substantially hemispherical contacts 90 connected to a servo circuit (not shown) via the wire 9 are fixed to the lower surface of the first chassis 10 facing the 80. These contacts 80, 90
Is turned on when loading is completed, as shown in FIG. 6, so that the capstan motor 24 and the servo circuit are connected. Incidentally, each of the contacts 80 and 90 may have a function as a position sensor for a mode position such as a loading end.

FIG. 12 shows a tape cassette 2 used in the rotary head type recording / reproducing apparatus 1. In the figure, reference numerals 4 and 5 are reels, and reference numerals 6 and 7 are tape guides. The tape cassette 2 is a reel base 1 of the rotary head type recording / reproducing apparatus 1.
When mounted on the first and the first chassis 11, the cassette is held at a predetermined position by a cassette holder (not shown) arranged on the first chassis 10.

G _2. Operation of Embodiment According to the rotary head type recording / reproducing apparatus 1 of the above embodiment,
A pair of reel stands 11, 11 of a first chassis 10 shown in FIG.
When the tape 3 is loaded on the rotary head drum 22 with the tape cassette 2 mounted thereon, first, when the motor 16 is driven, the slider 41 is moved to the first position via the gear 17 and the rack 40 meshing with the gear 17. Move (forward) so as to enter the lower side of the chassis 10. Locking piece of this slider 41
Since 43 is locked by a leaf spring 29 fixed to the second chassis 20, the second chassis 20 moves together with the lower side of the first chassis 10 in synchronization with the movement of the slider 41 ( Going forward). At this time, the tip surface of the slider 41
Since 41b is in contact with the tape guide 51 of the tape tension adjusting mechanism 50, the tension arm 52 is locked and does not move.

During the loading of the tape 3 when the rotary head drum 22 on the second chassis 20 approaches the first chassis 10, as shown in FIG. 9, each pressing rod 70 protruding from the second chassis 20 is Each piece 10A, 10 of the first chassis 10
The second chassis 20 is deformed so as to temporarily push the rotary head drum 22 side of the second chassis 20 downward slightly downward. Then, the second chassis 20 is further moved to the first chassis 10.
Immediately before the loading is completed, as shown in FIG. 10, when the pressing rods 70 are received in the recesses 10f of the pieces 10A and 10B, as shown in FIG. The side returns to the original position, and the corners of the pieces 10A, 10B are hooked up to the hooks 60b, 6 of the pair of positioning blocks 60, 60.
0b, the first and second chassis 10, 20 are positioned vertically. And the first chassis
When the positioning pin 62 of the second chassis 20 comes into contact with the stopper 61 of the tenth, the movement of the second chassis 20 stops, and the loading of the tape 3 onto the rotary head drum 22 is completed. When the loading is completed, the contacts 80 for the capstan motor 23 provided on the second chassis 20 and the contacts 90 for the servo circuit provided on the first chassis 10 are turned on, and the above capping is performed. Signals, electric power, and the like can be supplied to the stun motor 23 from the servo circuit.

In this way, the rotary head drum 22 is slightly lowered while the tape 3 is being loaded, as shown by the dashed line in FIG. 11, and the lower edge 3a of the tape 3 is lowered from its lead portion 22a. Since the lower edge 3a of the tape 3 is raised from the lead 22a of the rotary head drum 22 as shown by a solid line in the drawing, the tape 3 is easily formed when the tape 3 is loaded. Damage can be reliably prevented, and errors in reading and writing information on the tape 3 can be reliably prevented.
When the loading is completed, the first chassis 10 and the second chassis 20 are positioned vertically in such a manner that the respective pieces 10A, 10B of the first chassis 10 are slightly deformed downward by a pair of positioning blocks. It is held at the lower part of each hook 60b of 60, 60,
Due to the elastic force, the first chassis 10 and the second chassis 20
The vertical positioning of the tape guide
The position accuracy of the rotary head drum 22 can be obtained with high accuracy. These positioning are performed by the first chassis 10.
The elastic deformation of each of the pieces 10A and 10B can be performed without using other members such as a spring, which is advantageous in cost and space. Further, the supply of signals and the like from the servo circuit to the capstan motor 22 is performed by the second and first chassis.
Since each contact 80, 90 provided in 20, 10 is turned on, there is no movement of a wire such as a harness as in the related art, and the entire device can be downsized accordingly. , Reliability can be improved.

Therefore, in the FWD mode such as recording and reproduction, the motor 16
Is further driven. As a result, the slider 41 further moves forward. However, since the second chassis 20 is in contact with the stopper 61 of the first chassis 10 via the positioning pin 62, the slider 41 does not further move forward. Piece 43
Is disengaged from the leaf spring 29 of the second chassis 20 and the slider 41
Only move. By the forward movement of the slider 41, as shown in FIG. 4, the distal end surface 41c of the slider 41 separates from the tape guide 51 of the tape tension adjusting mechanism 50 so that the tape tension can be adjusted. The portion 41c presses the locking portion 31a of the operation arm 31 of the pinch roller pressing mechanism 30, and rotates the operation arm 31 about the shaft 32. The rotation of the operating arm 31 causes the pinch roller 38 to be pressed against the capstan 23 via the connecting arm 34 and the roller support arm 37 with the tape 3 interposed therebetween.
Switch to mode.

As described above, by driving one motor 16, the second chassis 20 is reciprocated with respect to the first chassis 10, and the tape tension adjusting mechanism 50 and the pinch roller pressing mechanism 30 are interlocked. Switching of each mode such as loading and unloading operations of the tape 3 and recording and reproduction can be easily performed. The tape tension adjusting mechanism 50 and the pinch roller pressing mechanism 30
Can be extremely simplified, so that the overall structure of the rotary head type recording / reproducing apparatus 1 can be reduced in size, and the cost can be further reduced.

According to the embodiment, the second chassis 20 is reciprocated with respect to the first chassis 10, but the first chassis 10 is reciprocated with respect to the second chassis 20. You may.

Further, the tape tension adjusting mechanism and the like are operated in conjunction with the reciprocating movement of the slider 41, but the invention is not limited thereto, and the reel stand brake mechanism for braking the reel stand 11 is linked with the reciprocating movement of the slider 41. May be activated.

H. Effects of the Invention As described above, according to the present invention, the tape tension adjusting mechanism and the pinch roller press-fitting mechanism are interlocked by the relative movement of the first and second chassis driven by the drive source, thereby loading and unloading the tape. Since the unloading operation is easily performed, the mechanism for operating the tape tension adjusting mechanism and the pinch roller pressing mechanism can be extremely simplified, and the size and cost of the entire apparatus can be further reduced. .

Further, a pressing means is provided for pressing the second chassis in a direction away from the first chassis until just before the completion of the loading and for returning the tape to the original position almost simultaneously with the completion of the loading. The inconvenience that the tape is lowered by gravity and the lower edge of the tape rides on the lead portion of the rotary head drum and damages the tape is prevented.

[Brief description of the drawings]

FIG. 1 is a schematic plan view of a rotary head type recording / reproducing apparatus before loading showing one embodiment of the present invention, and FIG. 2 is a schematic plan view showing states of first and second chassis of the apparatus before loading. , FIG. 3 is a schematic plan view showing a loading completed state of the apparatus, FIG. 4 is a schematic plan view showing an FWD state of the apparatus, FIG. 5 is a side view of a pinch roller pressing mechanism of the apparatus, FIG. Is an enlarged explanatory view of each contact of the apparatus, FIG. 7 is an explanatory view of main parts at the time of loading of the apparatus, FIG. 8 is an explanatory view of main parts at the time of completion of loading of the apparatus, and FIG. FIG. 10 is a sectional view taken along the line BB in FIG. 8, FIG. 11 is an explanatory view showing the positional relationship between the rotary head drum and the tape, and FIG. 12 is a sectional view of the tape cassette. FIG. 13 is a schematic plan view of a head type recording / reproducing apparatus before loading of a prior art example, and FIG. The figure is a schematic plan view showing the loading completion state of the apparatus. DESCRIPTION OF SYMBOLS 1 ... Rotating head type recording / reproducing apparatus, 2 ... Tape cassette, 2a ... Opening part, 3 ... Tape, 10 ... First chassis, 11 ... Reel base, 13,14 ... Tape guide, 16 ......
Motor (drive source), 20 second chassis, 22 rotary head drum, 30 pinch roller pressure bonding mechanism, 50 tape tension adjusting mechanism, 10f concave section, 70 pressing rod.

Claims (1)

(57) [Claims] A first chassis having a reel base for mounting a tape cassette and having a tape guide erected at a predetermined position corresponding to an opening of the mounted tape cassette;
At least a second rotary head drum rotatably disposed
The tapes exposed from the opening of the tape cassette by the relative movement of the two chassis are loaded and unloaded onto the rotary head drum via the tape guide. A rotary head type recording / reproducing apparatus, wherein a driving source for relatively moving the two chassis is provided in one of the first and second chassis, and the second chassis is mounted until immediately before the completion of the loading. A pressing means for pressing in a direction away from the first chassis and for returning to the original position substantially simultaneously with the completion of loading is provided on at least one chassis, and a tape tension adjusting mechanism and a pinch roller pressing mechanism are provided on one of the chassis. Provided separately, tape tension adjustment mechanism and pinch roller pressure bonding A rotary head type recording / reproducing apparatus, wherein a mechanism is operated so as to operate by the loading and not to operate by the unloading.