JP2606502B2 - Magnetic recording / reproducing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary head cylinder on which a magnetic head is mounted, which is driven by winding a magnetic tape around the magnetic head and slidingly contacting the magnetic head with the magnetic tape.
The present invention relates to a magnetic recording and reproducing apparatus such as a video tape recorder that records and reproduces information signals of video signals.

[0002]

2. Description of the Related Art In recent years, magnetic recording / reproducing devices such as cassette type video tape recorders have become smaller and lighter.
In video movies, the diameter of the rotating head cylinder is set to 2/3 of the standard type, and the winding angle is set to 285.
As a degree, a type using a four-head type small-diameter cylinder has become mainstream.

The configuration of a conventional magnetic recording / reproducing apparatus will be described below with reference to FIG. FIG. 26 is a plan view of a conventional magnetic recording / reproducing apparatus. In FIG. 26, 101 is a cassette having a built-in reel around which a magnetic tape is wound, and 102 is a rotating cylinder in which magnetic heads 103a to 103d are arranged at 90 [deg.] On the circumference. 104a and 104b are tape guide posts, which are arranged in the cassette opening (shown by broken lines) when a cassette is mounted, and when the cassette detection switch (not shown) detects the cassette mounting, the tape guide posts 104a and 104b are arrows. The tape is loaded by the loading ring 111 along the path indicated by, and is fixed at a predetermined position. further,
In conjunction with this, the cassette 101 becomes a rotating cylinder 102
, And is fixed at a predetermined position. 105
Reference numerals a and 105b denote inclined posts.
a is fixed to the same base as the tape guide post 104a. The inclined post 105b is fixed on the base 109. Reference numeral 106 denotes a capstan for moving the magnetic tape 110 at a predetermined speed.
08, the magnetic tape 110 is moved to the capstan 106.
By pressurizing the magnetic tape 110, the rotational force of the capstan 106 is transmitted to the magnetic tape 110, and the magnetic tape 110 is transported at a predetermined speed.

[0004]

However, in the above-described conventional configuration, the tape guide post 10 is placed in the space behind the rotary cylinder 102 after the tape loading is completed.
4a and 104b are located, and the dimension becomes large in the depth of the mechanism by that much, which has a problem that it becomes an obstacle to further miniaturization.

An object of the present invention is to solve the above-mentioned conventional problems and to provide a miniaturized VTR determined by the size of a rotary cylinder and a cassette.

[0006]

In order to achieve this object, a magnetic recording / reproducing apparatus according to the present invention is arranged such that a magnetic tape is pulled out of a cassette containing a reel on which a magnetic tape is wound and is installed outside the cassette. A magnetic recording / reproducing apparatus configured to record or reproduce a signal by running while being attached to a rotating cylinder, wherein a first cabinet accommodating a VTR unit and a cassette are held and fixed to the first cabinet. Opened and closed around a fulcrum provided in the first cabinet that accommodates the video camera and the EVF section, and holds the rotating cylinder, the first base that holds the rotating cylinder and slides with respect to the second base. The first base and the space in which the rotating cylinder fits when the rotating cylinder is ejected from the opening of the cassette having a hinge provided so as to be closed. It has a second cabinet that is configured so that, a garage unit for fixing the cassette to the second base, and drive means for sliding the first base when locking the garage second base.

[0007]

With this configuration, the depth of the apparatus can be set to a size determined by the cassette and the rotating cylinder, and the second base and the cassette do not move with respect to the first cabinet when the cassette is mounted and removed. Configuration.

[0008]

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

First, the tape loading means will be described. FIG. 1 is a plan view showing the external appearance of a magnetic recording / reproducing apparatus according to an embodiment of the present invention, and FIG. 2 is a plan view showing a mechanism of the apparatus. In FIG. 2, reference numeral 2 denotes a rotary cylinder, and a magnetic tape 4 pulled out from a cassette 1 mounted on a magnetic recording / reproducing apparatus has an outer peripheral surface of 331.5.
It is wound over the range of °. A set of four magnetic heads 3a, 3b, 3c, 3
d slightly protrudes the tip from the outer periphery of the rotary cylinder 2 and is arranged on the circumference in a 90-degree division. A T-post base 7 having a tape guide post 5b for winding the magnetic tape 4 pulled out from the cassette 1 around the outer peripheral surface of the rotary cylinder 2 from the counterclockwise direction and a T-post base 7 having an inclined post 6b is provided at a lower portion of the rotary cylinder 2 for the loading guide 8. It is provided movably along it. FIG. 3 shows a T post-based loading mechanism.
At the lower part of the post base 7, a T formed by a part of the internal gear
The post base gear 9 is attached to the T post base 7 with some play. Further, the loading gears 11 to 14 rotatably provided on the first base 10 are arranged on the circumference so as to mesh with the T post base gear 9 in order. Further, a loading ring 28 that meshes with all of the loading gears 11 to 14 is rotatably provided below the rotary cylinder 2 by the roller 15. The loading gear 14 is provided with a second base 16 for holding the cassette 1.
In the state where the tape loading is completed, the transmission gear 17 shifts from the rack portion 16a to the T post base crimping gear 18 and engages with the T post base crimping gear 18. The crimping spring 19 is configured so that a crimping force acts on the T-post base 7.

FIG. 4 shows a mechanism for sliding the second base 16. Reference numeral 20 denotes an internal gear formed on the first base 10, reference numeral 21 denotes a sun gear rotatably provided coaxially with the internal gear 20, and reference numeral 22 denotes an internal gear 20 sun gear 21.
And a planetary gear that constitutes a planetary gear mechanism. The sun gear 21 is configured to be driven by a loading motor 27 via reduction gears 23 to 25 and a transmission gear 26. A base drive shaft 29 is erected on the planetary gear 22 at an eccentric position. The base drive shaft 29 corresponds to the cam groove 16b formed in the second base 16,
When the planetary gear 22 is revolved in the direction of arrow A by the rotation of the sun gear 21, the locus 29a of the base drive shaft 29 draws a cycloid curve. At this time, the sun gear 21
And the gear ratio of the planetary gear 22 is 2: 1. The trajectory 29a of the base drive shaft 29 is first formed in the direction of arrow B and then formed in the direction of arrow C.
b is taken so as to match the locus shape formed in the arrow C direction.

FIG. 5 shows a mechanism for pulling out the tape guide posts 5c and 5d and the tension post 44.

In FIG. 5, reference numeral 30 denotes a T4 post arm which holds the tape guide post 5C and pulls out the magnetic tape 4 from the inside of the cassette 1 to the outside of the cassette 1 during tape loading. It is provided rotatably. Also, the T4 post arm 30
Is provided with a gear portion, and meshes with a gear portion of a T4 post arm drive gear 33 having a rotation shaft 32 on the first base 10. T4 post arm drive gear 33
A guide pin 34 corresponding to a cam groove 16C formed on the second base 16 is provided above. A leaf spring 35 is mounted on the T4 post arm 30, and when the loading is completed, the crimping pin 3 provided on the second base 16 is mounted.
T4 post arm 30 pressed in the direction of arrow B at 6
Is fixed at a predetermined position. Reference numeral 37 denotes a T5 post arm which holds the tape guide post 5d and has a rotating shaft 38 on the second base 16, and has a guide pin 39 corresponding to the cam groove 10a formed in the first base 10. ing.
40, a tension band 42 is wound around a drum portion 41 formed on a reel base, and the tape supply reel 7 shown in FIG.
9 is a tension arm for controlling the tension of the magnetic tape 4 during recording and reproduction by applying a rotational load to the magnetic tape 9. 43 is a tension spring, and 44 is a tension post for detecting the tape tension. The tension arm 40 has a rotating shaft 45 on the second base 16, and has a guide pin 46 corresponding to the cam groove 10 b formed in the first base 10.

FIG. 6 shows a main part of a loading mechanism of the tape guide post 5a. In FIG. 6, 47
Is an S-post base for holding the tape guide post 5a and the inclined post 6a, and is fixed at a predetermined position by a V-stopper 48 provided on the first base 10. The S-post base 47 is connected to the rotation shaft 5 on the second base 16.
It is engaged by an S loading arm A49 that can rotate around zero. The S loading arm B51 has a cam groove corresponding to the base drive shaft 29 provided on the planetary gear 22, and is mounted so as to be rotatable about a rotation shaft 50. S loading arm B51 and S loading arm A49 are S post base crimp spring 5
2 apply a force in the direction of closing each other. 5
Reference numeral 3 denotes an S post base guide provided on the second base 16.

FIG. 7 is a side view of the planetary gear mechanism. In the figure, reference numeral 56 denotes a mode switch, which is a rotation shaft 56a of the planetary gear 22 and a pinch pressing lever 57 described later.
And a protruding portion 56b for kicking. 54, 5 in the figure
5 is a reduction gear, 58 is a planetary gear mechanism support plate, 59 is a reduction gear support plate, 60, 61, and 62 are gear rotation axes,
63 is a loading motor pinion gear.

FIG. 8 is a diagram viewed from the side of the T post base 7 at the time of completion of the loading, and the two-dot chain line indicates the position of the bottom surface of the apparatus (the bottom surface of the first base 10). The T-post base gear 9 is attached to the T-post base 7 in a state where the loading guide pins 64a and 64b have rattling. The loading guide 8 indicated by a dashed line in the drawing is in a state of being sandwiched between the brim portion of the loading guide pin 64 and the T post base gear 9. The tape guide post 5b and the inclined post 6b are attached to the T-post base 7 while being suspended from above. The tape guide post 5 a has a configuration in which an upper flange 68 and a lower collar 67 of the tape are pressed into a roller shaft 66 which is a rotation axis of the guide roller 65 with the guide roller 65 interposed therebetween. A height adjustment screw 69 for height adjustment is press-fitted into the roller shaft 66,
It engages with a female thread formed on a boss 70 that is pressed into and fixed to the post base 7. Further, a slit 66a for a minus screw is formed in the head of the roller shaft 66 so that the roller can be turned by a screwdriver when adjusting the height. Reference numeral 76 denotes a locking screw for locking the post after the height of the tape guide post 5a has been adjusted.

Next, the pinch crimping mechanism will be described. In FIG. 9, reference numeral 71 denotes a pinch roller for sandwiching and pressing the magnetic tape 4 on a capstan 72 and driving the magnetic tape 4 at a predetermined speed by a capstan motor 73. Reference numeral 74 denotes a pinch arm that rotatably holds the pinch roller 71, and the rotation support shaft 7 on the second base 16.
Five. Reference numeral 57 denotes a pinch crimp lever, which similarly has a rotation support shaft 77 on the second base 16, is rotated counterclockwise by a projection 56 b formed on the mode switch 56, and is pinched by a pinch crimp spring 78. The roller 71 is configured to generate a pressing force.

Next, the tape path will be described. In FIG. 10, the magnetic tape 4 pulled out from the tape supply reel 79 is drawn out horizontally with respect to the cassette 1 until reaching the tension post 44, the impedance roller 80, the tape guide post 5a, and the inclined post 6a. The tape guide post 5a and the inclined post 6a are fixed on the first base 10 after the magnetic tape 4 is pulled out from the opening of the cassette 1, and the inclined post 6a is disposed in parallel with the rotary cylinder 2 in the axial direction. I have. The magnetic tape 4 wound around the rotating cylinder 2 descends along the lead surface formed on the rotating cylinder 2, and after moving down the inclined post 6b and the tape guide post 5b, gradually ascends to the tape guide post 5c. And returns to the height of the tape in the cassette 1. Thereafter, the magnetic tape 4 is subjected to the twist correction by the inclined post 6c, and reaches the tape take-up reel 81 in the cassette 1 through the capstan 72, the pinch roller 71, and the tape guide 5d. Here, the tape guide post 5b and the inclined post 6b are arranged in parallel with the rotating cylinder 2 in the axial direction after the magnetic tape 4 is pulled out from the opening of the cassette 1.

FIGS. 11 and 12 show the reel drive mechanism and the arrangement of the first base 10 and the second base 16. 82 is a supply reel table, and 83 is a take-up reel table. The rotation of the capstan motor 73 is transmitted to a supply reel table 82 or a take-up reel table 83 via a timing belt 84, a timing pulley 85, a center gear 86, and an idler gear 87. Second base 1
6 is provided with guide grooves 16d, 16e, 16f for sliding movement on the first base 10 during tape loading, and 10c, 10d, 10e are guide pins provided on the first base 10. FIG. 12 is a schematic diagram showing the reel drive mechanism and the side surfaces of the first base 10 and the second base 16. In the second base 16, the parts of the supply reel base 82 and the take-up reel base 83 are sunk. The reel driving mechanism such as an idler gear is accommodated between the second base 16 and the first base 10. Thus, when the cassette 1 is taken out from the second base 16, the mechanism serves as a decorative plate for making the mechanism invisible from the outside.

The operation of the magnetic recording / reproducing apparatus configured as described above will be described with reference to the drawings.

First, the sliding operation of the second base 16 will be described. FIG. 13 is a plan view of the entire mechanism section showing a state where the cassette is moved out of the cabinet.
In this state, when the cassette 1 is first mounted on the apparatus as shown by a two-dot chain line, the mounting of the cassette is detected by a detection switch (not shown) for detecting the mounting of the cassette, and the loading motor 27 rotates. As a result, the sun gear 21 rotates counterclockwise via the reduction gears 23, 54, 24, 55, 25 and the transmission gear 26, and the planetary gear 22 revolves around the sun gear 21. FIG. 14 is a diagram illustrating a main part of a mechanism that drives the planetary gear 22. In the drawing, the planetary gear 22 is at a position 22A when the cassette is mounted, and moves through 22B to 22C as the sun gear 21 rotates. At this time, the base drive shaft 29 follows the trajectory 29a of the base drive shaft 29,
Is moved from the position 22A to the position 22B, the second base 16 is slid in the direction of arrow B by the cam groove 16b.

Next, the loading operation of the T-post base 7 will be described with reference to FIGS. 3, 15, 16, and 17. FIG. By the sliding movement of the second base 16, the transmission gear 17 meshing with the rack portion 16 a formed on the second base 16 rotates, and the rotation is transmitted to the loading gear 14 meshing with the T-pos base gear 9. (See FIG. 14) Further, since the rotation of the loading gear 14 is transmitted to the other loading gears 11, 12, and 13 by the loading ring 28, the T-post base 7 separates the loading gears 14, 13, 12, and 13 from each other.
The paper is fed out along the loading guide 8 in the order of 11. Here, the loading guide 8 is formed so as to sink as the T-post base 7 is sent out of the cassette (see FIG. 17). The meshing operation between the T-post base gear 9 and the loading gears 11 to 14 is three. It will be performed dimensionally. FIG.
In the loading process as shown in FIGS. 5 and 16, the tape guide post 5b of the T-post base 7 protrudes from the first base 10, and thereafter, as shown in FIG. Cam part 16f
As a result, the loading guide pin 64a is guided, and the first base is housed inside the 10. As a result, when the loading is completed, no mechanism is arranged at the rear of the rotary cylinder 2 so that the depth of the apparatus can be reduced. At this time, the portion where the T post base gear 9 is attached to the T post base 7 is accommodated in the lower part of the rotary cylinder 2.

FIG. 20 shows the arrangement of the T5 post arm 37, the T4 post arm 30, and the tension arm 40 during unloading.

The tension arm 40 is at the position shown in FIG. 20 when the cassette 1 is mounted. During the sliding movement of the second base 16, the counter arm is counterclockwise by the guide pin 46 and the cam groove 10 b formed in the first base 10. Rotate in the direction. Similarly T
The 5-post arm 37 is also rotated clockwise by the guide pin 39 and the cam groove 10a. The T4 post arm 30 has a guide pin 39 corresponding to the guide groove 16c formed in the second base 16 and a T4 post arm drive gear 33.
As a result, the plate spring 35 attached to the T4 post arm 30 is fixed in place by applying a pressing force by a pressing pin 36 provided on the second base 16. Is done.

Next, the loading operation of the S post base 47 will be described with reference to FIGS. After the slide movement of the second base 16 is completed, the sun gear 21 further rotates, and the base drive shaft 29 moves in the direction of arrow C. As a result, the S loading arm B51 moves to the arrow D
18 (see FIG. 18), the S loading arm A49 also rotates about the rotation shaft 50. afterwards,
The S post base 47 is fixed at a predetermined position shown in FIG. 5, and a pressing force is applied by an S board pressing spring 52.

Next, the pressing operation of the pinch roller will be described with reference to FIGS. After the loading of the S-post base 47 is completed, the planetary gear 22 further rotates, and the projection 56b of the mode switch 56 arranged so as to interlock with the revolving motion of the planetary gear 22 kicks the pinch pressure lever 57. As a result, the pinch roller 71 is pressed against the capstan 72, and the apparatus enters a recording / reproducing mode. At this point, the loading motor 27 stops.

Next, the cabinet configuration of the present apparatus will be described with reference to FIGS. FIG. 21 is an external view of a video movie, and 90 is a VTR of a magnetic recording / reproducing apparatus.
A first cabinet 89 stores a video camera unit 90, an EVF unit 91, and a liquid crystal monitor 92. FIG. 22 is an external view of a state where the first cabinet 100 and the second cabinet 89 are opened when the cassette 1 is mounted or removed from the video movie. The second cabinet 89 is configured to open and close with a hinge 93 around a fulcrum 94 provided on the first cabinet 100. 95 is a cassette lid. 23 and 24 are external views of the video movie viewed from the lens direction of the video camera unit 90. FIG.
FIG. 24 shows a setup state, and 96 is a garage section for fixing the cassette 1 to the second base 16. 9
Reference numeral 7 denotes a space between the rotary cylinder 2 and the first base 10 when the rotary cylinder 2 is discharged from the opening of the cassette 1. FIG. 25A is a schematic sectional view showing a state in which the cassette 1 is mounted, and 98 and 99 are blind plates. FIG. 25B is a diagram showing a schematic cross section in the middle of loading corresponding to the state of FIG. FIG. 25C shows a state where the first cabinet 100 and the second cabinet 89 are closed after the tape loading is completed. As described above, when the cassette is mounted, the rotary cylinder 2 and the first base 10 enter the space 97 (FIG. 24) created by opening the second cabinet 89.
This eliminates the necessity for the conventional configuration in which the cassette 1 and the second base 16 holding the cassette 1 project out of the cabinet when the cassette is mounted or detached. It should be noted that a safety mechanism is provided to lock the second cabinet 89 so as not to close when the garage section 96 is open as shown in FIG. 24 and during loading. Further, since the FF / REW of the magnetic tape in the cassette 1 is performed in the unloading state (FIGS. 13 and 25), the magnetic tape 4 does not need to be wound around the rotating cylinder 2 and each tape guide post. Thereby, high-speed FF / REW can be realized. At this time, of course, the safety mechanism is working.

[0027]

As described above, according to the present invention, a magnetic tape is drawn out of a cassette containing a reel on which a magnetic tape is wound, and is run while being attached to a rotary head cylinder installed outside the cassette. A magnetic recording / reproducing apparatus configured to record or reproduce a signal, comprising: a first cabinet accommodating a VTR unit; a second base holding a cassette and fixed to the first cabinet; And a hinge that accommodates the video camera and the EVF unit and that opens and closes around a fulcrum provided in the first cabinet. A second cabinet configured to create a space in which the first base and the rotating cylinder fit when the rotating cylinder is ejected from the opening of the cassette. And a garage section for fixing the cassette to the second base, and a driving means for sliding the first base when the garage is locked to the second base, thereby reducing the size of the apparatus to a rotary cylinder and a cassette. , And has an excellent characteristic that the cassette can be miniaturized without sliding when the cassette is ejected or mounted. Further, high-speed FF / REW can be performed with the second cabinet opened.

[Brief description of the drawings]

FIG. 1 is a schematic plan view of a magnetic recording / reproducing apparatus according to an embodiment of the present invention.

FIG. 2 is a plan view of the magnetic recording / reproducing apparatus according to an embodiment of the present invention when loading is completed.

FIG. 3 is a plan view of a T post-based loading mechanism of the magnetic recording / reproducing apparatus according to one embodiment of the present invention.

FIG. 4 is a plan view of a slide moving mechanism of a second base of the magnetic recording / reproducing apparatus according to one embodiment of the present invention.

FIG. 5 is a plan view of the magnetic recording / reproducing apparatus according to one embodiment of the present invention when loading of the tension arm and the tape guide post is completed.

FIG. 6 is a plan view of an S-post-based loading mechanism of the magnetic recording / reproducing apparatus according to one embodiment of the present invention.

FIG. 7 is a side view of a planetary gear mechanism of the magnetic recording / reproducing apparatus according to one embodiment of the present invention.

FIG. 8 is a side view of a T post base of the magnetic recording / reproducing apparatus according to one embodiment of the present invention.

FIG. 9 is a plan view of a pinch crimping mechanism of the magnetic recording / reproducing apparatus according to one embodiment of the present invention.

FIG. 10 is a plan view of a tape running path of the magnetic recording / reproducing apparatus according to one embodiment of the present invention.

FIG. 11 is a plan view of a reel drive mechanism of the magnetic recording / reproducing apparatus according to one embodiment of the present invention.

FIG. 12 is a schematic side view of a second base and a reel driving mechanism of the magnetic recording / reproducing apparatus according to one embodiment of the present invention.

FIG. 13 is a plan view showing a state in which the second base has been moved out of the cabinet in the magnetic recording / reproducing apparatus according to one embodiment of the present invention;

FIG. 14 is a plan view for explaining the operation of the planetary gear mechanism of the magnetic recording / reproducing apparatus in the same embodiment.

FIG. 15 is a plan view for explaining the operation of the T-post base loading mechanism of the magnetic recording / reproducing apparatus in the same embodiment.

FIG. 16 is a plan view for explaining the operation of the T-post base loading mechanism of the magnetic recording / reproducing apparatus in the same embodiment.

FIG. 17 is a plan view for explaining the operation of the T-post base loading mechanism of the magnetic recording and reproducing apparatus in the same embodiment.

FIG. 18 is a perspective view for explaining the operation of a T-post base loading mechanism of the magnetic recording / reproducing apparatus in the same embodiment.

FIG. 19 is a plan view for explaining the operation of the S-post base loading mechanism of the magnetic recording and reproducing apparatus in the same embodiment.

FIG. 20 is a plan view for explaining operations of a tension arm, a T4 post arm, and a T5 post arm of the magnetic recording / reproducing apparatus in the same embodiment.

FIG. 21 is an external view of a video movie which is a magnetic recording / reproducing device in the same embodiment.

FIG. 22 is an external view of a video movie which is a magnetic recording / reproducing apparatus in the same embodiment.

FIG. 23 is an external view of a video movie which is a magnetic recording / reproducing apparatus in the same embodiment.

FIG. 24 is an external view of a video movie which is a magnetic recording / reproducing device in the same embodiment.

FIG. 25 is a sectional view of a video movie which is a magnetic recording / reproducing apparatus in the same embodiment.

FIG. 26 is a schematic diagram of a conventional magnetic recording / reproducing apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cassette 2 Rotating cylinder 5 Tape guide post 10a, 10b, 16b, 16c Cam groove 75, 77 Rotation support shaft

Claims (1)

(57) [Claims] The magnetic tape is drawn out of a cassette containing a reel on which a magnetic tape is wound, and is run in contact with a rotary cylinder installed outside the cassette to record or reproduce a signal. A magnetic recording / reproducing apparatus comprising: a first cabinet accommodating a VTR unit; a second base holding the cassette and fixed to the first cabinet; and a second base holding the rotating cylinder. A first base that slides with respect to the second base, and a hinge that houses a video camera and an EVF unit and is provided to open and close around a fulcrum provided in the first cabinet; A second base configured to create a space in which the first base and the rotary cylinder fit when the rotary cylinder is ejected from an opening of the cassette. A cabinet, a garage section for fixing the cassette to the second base, and drive means for slidingly moving the first base when the garage section is locked to the second base. Magnetic recording and reproducing device.