JPS6238556A - Magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To make a device small in size and light in weight by joining in one body and separating the first and second reel turn tables in accordance with loading and unloading of a cassette holder. CONSTITUTION:When a tape is run at a high speed to be fast forwarded or rewound, a gear 43B is selectively engaged with one gears 41B and 42B of lower reel base parts 39B and 40B, and a gear 45 is moved in the axial direction and is engaged with the gear 43B. Upper reel turn tables 39A and 40A are rotated at a speed higher than the speed for recording or reproducing in accordance with the rotating force of a motor 21 to run the tape at a high speed. In this magnetic recording and reproducing device, the first reel turn table engaged with a tape cassette is arranged in the cassette holder, and the second reel turn table is arranged on a part of a chassis corresponding to the first reel turn table, and the first and second reel turn tables are joined in one body or separated in accordance with loading and unloading of the cassette holder. Thus, the interval between a tape cassette 33 and a cylinder 12 is shortened as much as possible to make the device small in size and light in weight.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a reel unit device suitable for a magnetic recording/reproducing device oriented toward miniaturization, such as an 8 mm video tape recorder.

[Technical background of the invention and its problems] Recently, video tape recorders (hereinafter referred to as VTRs) have been made smaller and lighter by using tape cassettes called 8mm video tape cassettes, making them easier to carry. There are now products that are designed to improve handling properties. By the way, VTRs that have been made smaller in this way
Currently, by using tape cassettes, which are about 1/4 smaller in size than conventional 172-inch video cassettes, miniaturization is being promoted to a corresponding size.

However, due to the structure of the VTR, there are restrictions on the promotion of miniaturization due to the relationship between the tape cassette and the cylinder in which the magnetic head is mounted. However, the ease of handling including transportation was not satisfactory.

Therefore, in the above-mentioned VTR, each mechanical part including the reel stand device is organically combined to promote further miniaturization and weight reduction, and to improve handling including portability as much as possible. [Purpose of the Invention] This invention has been made in view of the above circumstances.
It is an object of the present invention to provide a magnetic recording/reproducing device that has a simple configuration and is made as compact and lightweight as possible.

[Summary of the Invention] That is, the present invention provides a method in which a first reel stand that engages with a tape cassette is arranged in a cassette holder, and a second reel stand corresponding to the first reel stand is provided on the chassis. The first and second reel stands are configured to be combined and separated in response to loading and unloading of the cassette holder, thereby effectively promoting downsizing and weight reduction. It is something.

[Embodiments of the Invention] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

1 and 2 respectively show a magnetic recording/reproducing device according to an embodiment of the present invention, FIG. 1 shows before loading (in other words, unloading is completed), and FIG. 2 shows after loading (in other words, unloading is completed). This shows the state before unloading.

That is, numeral 10 in the figure is a chassis housed in a cabinet 11, and a cylinder 12 on which a magnetic head (not shown) is mounted is disposed on this chassis 10 at a predetermined angle of inclination. A loading ring 13 is disposed around the cylinder 12, and this loading ring 13 includes a first drive gear 14 for driving tape loading and a cassette loading operation (moving the tape cassette 33 in the cylinder direction). I will call it this)
The teeth of second drive gears 15 for driving are engaged with each other.

The first and second drive gears 14 and 15 are
A fourth gear 2 whose center axis is the capstan 19 is connected to the drive gear 14 via the first to third gears 16 to 18.
0, and this fourth gear 20 is fitted onto the rotating shaft of the motor 21 and meshed with the drive source gear 22. Also,
The second drive gear 15 is connected to the fifth and sixth gears 23°2.
4 and is meshed with the seventh gear 25.

One end of a cassette loading lever 26 is attached to the central shaft of the seventh gear 25, and an engaging protrusion 27 is formed at the other end of the cassette loading lever 26. The engaging protrusion 27 faces the cylinder 12 and can be freely loaded (moved) in the directions of arrows A and B.
The cassette holder 28 is detachably engaged with the cassette holder 28 disposed in the cassette holder 28 . This cassette holder 28 has first to fourth links 29 to 32 as shown in FIGS. 3 and 4, and in FIG. and bucket part 3
supporting the tape cassette 33 mounted by 4;
Guide rail 35 provided opposite the cylinder 12
．． The shifter part 37 is configured to allow loading in the directions of arrows A and B along 36, and is protruded from the cabinet 11 in the state before loading, and is housed in the cabinet 11 upon completion of the loading of the cassette. Of these, the shifter section 37 has its tip engaged with the engaging protrusion 27 of the cassette loading lever 26 as shown in FIG. 3 before loading the cassette, and when loading is completed as shown in FIG. A recessed portion 38 from which the reel is removed is formed, and a pair of upper reel stand portions 39A and 40A for supply and winding are disposed approximately in the center thereof. These upper reel pedestals 39A and 40A are connected to lower reel pedestals 39B and 40B for feeding and winding, which are disposed at predetermined positions on the chassis 10, as shown in FIG.
The cassette holders 28 and 28 are formed in correspondence with each other, and are combined and separated in conjunction with the cassette loading of the cassette holder 28 in the directions of arrows A and B. These upper and lower reel stand parts 39A, 40A and 39B, 40B
Coaxially there is a gear 41 for driving the tape at constant speed and high speed.
A, 42A and 41B, 42B are provided, respectively.

These gears 41A, 42A and 41B.

42B has eighth and ninth gears 43 for tape running drive.
A and 43B are meshed with each other. These 8th and 9th
The gears 43A and 43B are coaxially and rotatably attached to the rotating shaft 43C, and the swinging member 4 is attached to the rotating shaft 43C.
One end of 4 is attached. A tenth gear 45 is provided at the other end of this swinging member 44 so as to be movable in the axial direction.

This tenth gear 45 is controlled to move in the axial direction by a control mechanism (not shown), and the eighth and ninth gears 43A, 43B
The eighth and ninth gears 43A are selectively meshed with each other according to their rotational drive direction.

43B is urged to rotate clockwise and counterclockwise in the figure via the swinging member 44. A pulley 46 is formed coaxially with the tenth gear 45, and this pulley 46 is connected to the pulley 4 coaxially formed with the drive source gear 22.
7 via a belt 48 so that rotational force can be transmitted.

Further, in the chassis 10, a first slider 49 and a rotatable tension arm 50 are provided at the opening 51 of the tape cassette 33 corresponding to the inlet side of the cylinder 12.
A rotatable pinch lever 54 supporting a second slider 52 and a pinch roller 53 and a rotatable tape pull-out member 55 are disposed corresponding to the outlet side of the cylinder 12. Opening 5 of tape cassette 33
It is arranged corresponding to 1. These first slider 49, tension arm 50, second slider 52,
Of the pinch lever 54 and the pull-out member 55, a first slider 50 and a tension lever 51, which are disposed on the inlet side of the cylinder 12, are provided with guides 56 and 57 that are rotatable approximately perpendicularly to the chassis 10. . and,
A second slider 5 disposed on the outlet side of the cylinder 12
2 includes a return guide 59 that is rotatable in response to the magnetic tape 58 that is wound diagonally around the cylinder 12;
A first inclined guide 60 for regulating the inclination angle and a first guide 61 for regulating the tape winding angle are respectively provided upright.

Further, the pinch roller 53 of the pinch lever 54 and the rotatable guide 62 for guiding the tape provided upright on the pull-out member 55 are each provided approximately perpendicularly to the chassis 10.

Furthermore, the chassis 1 on the inlet side of the cylinder 12
0, a fixed guide 63 and an erasing head 64, which are arranged approximately vertically, are arranged at a predetermined interval on the tape path.
A fixed guide portion 65 is disposed on the chassis 10 between the second slider 52 and the pinch roller 53 on the exit side. The fixed guide portion 65 includes a second inclined guide 66 for converting the tape reference plane corresponding to the first inclined guide 60 of the second slider 52 and a second inclined guide 66 extending substantially parallel to the first guide 1. For tape winding, for example, a rotatable second guide 67 for controlling the angle is provided upright.

Now, the magnetic recording/reproducing apparatus configured as described above operates as described below.

That is, when the tape cassette 33 is accommodated in the bucket part 34 of the cassette holder 28 protruding from the cabinet 11, the first to fourth links 2 of the bucket part 34
32 to 32, the two-part reel base part 39A of the shifter part 37
, 40A, and the first and second sliders 49 are attached to the opening 51 of the tape cassette 33 as shown in FIG.
, 52, a guide 57 for the tension lever 50, a pinch roller 53, and a guide 62 for the drawer member 55 are accommodated. Here, a cassette detection switch (not shown) detects the tape cassette 33, and the motor 21 is rotated clockwise in the figure. Then, the rotational force of the motor 21 is transmitted to the loading ring 13 via the drive source gear 22, the fourth to first gears 20, 18 to 16, and the first drive gear 14.
The loading ring 13 rotates counterclockwise in the figure, and in conjunction with the rotation, the loading ring 13 drives the seventh gear 25 through the second drive gear 15, fifth and sixth gears 23, 24. Rotate counterclockwise. As the seventh gear 25 rotates, it rotationally urges the cassette loading lever 26 to load the shifter section 37 supporting the tape cassette 33 in the direction of arrow A, and when it reaches a predetermined position, Above cassette loading lever 2
6 is disengaged from the recess 38 of the shifter section 37, and the cylinder 12 is positioned so as to bite into the opening 51 of the tape cassette 33 (see FIG. 2). At the same time, the upper reel stand parts 39A, 40A are connected to the lower reel stand parts 39B, 40.
B and completes cassette loading (see FIG. 5). Here, the first and second sliders 49 accommodated in the opening 51 of the tape cassette 33,
52, tension lever 50, pinch roller 53, and drawer member 55, among which the first and second sliders 49
．． 52 interlocks with the rotation of the loading ring 13 to respectively lock the magnetic tape 58 and perform tape loading, and the guide 5 of the tension lever 50
7. The pinch roller 53 of the pinch lever 54 and the guide 62 of the drawer member 55 are rotated in correspondence with the first and second sliders 49 and 52, respectively, to remove the magnetic tape 58 wound around the cassette tape 33. Make a tape pass. As a result, the magnetic tape 58 is brought into pressure contact with the capstan 19 by the pinch roller 53, and tension is applied by the tension lever 50, so that the magnetic tape 58 is pressed against the capstan 19 by the tension lever 50. The vehicle is run and recorded or played back.

Further, when the eject key (not shown) is operated in the above-mentioned cassette and tape loading completion state, the motor 21 is driven in reverse, and performs an operation substantially opposite to the above-described cassette and cheap loading operation.
The cassette holder 28 is unloaded to the pre-loading position shown in FIG. 1, and the cassette tape 3 is loaded.
3, it is possible to separate from the shifter section 37 by operating the bucket section 34, and for the sake of convenience, the explanation thereof will be omitted here. In this case, when unloading the magnetic tape 58 of the cassette tape 33, the pulley 4 provided coaxially with the drive source gear 22
The rotational force of No. 7 is applied to the belt 48, pulley 46, and tenth gear 4.
5. The signal is transmitted to the upper reel stand 40A on the supply side via the oscillating unit 44, the eighth gear 43A, and the gear 42A, and winding of the tape corresponding to the above-described loading is performed.

Further, in the above configuration, when the tape is running at high speed such as fast forwarding or rewinding, the gear 41B of one of the lower reel stand parts 39B and 40B.

The ninth gear 43B is selectively meshed with the gear 42B, and the tenth gear 45 is moved in the axial direction and meshed with the ninth gear 43B. As a result, the rotational force of the motor 21 is transferred to the belt 48. Pulley 46° 10th gear 45. 9th
One of the gears 41B and 42B of the lower reel stands 39B and 40B is driven to rotate at high speed through the gear 43B of the lower reel stands 39B and 40B, and in conjunction with this, the upper reel stands 39A and 40A are rotated at a higher speed than during recording or reproduction. Make the tape run at high speed.

In this manner, the magnetic recording and reproducing apparatus has a first reel base that engages with a tape cassette, which is disposed in the cassette holder, and a second reel base that is disposed on the chassis corresponding to the first reel base. , and the first and second reel stands are configured to be combined and separated in response to loading and unloading of the cassette holder. It is possible to make the spacing as close as possible, and to promote downsizing and weight reduction as much as possible.

Furthermore, although the present invention has been described in the above embodiment as applied to an 8mm video tape recorder using an 8mm videotape cassette, the present invention is not limited to this.
Approximately the same effect can be expected even when applied to a video tape recorder using a 1/2 inch tape cassette.

Further, in the above embodiment, a case has been described in which the tape cassette is loaded in a corresponding manner to a cylinder, and the cylinder is positioned relative to the opening of the magnetic recording/reproducing apparatus. The application is not limited to this, but it can also be applied to so-called front-loading magnetic recording and reproducing devices in which a tape cassette mounted in a cassette holder is moved approximately horizontally, and then moved approximately vertically and placed in a predetermined position. Almost the same effect can be expected.

It goes without saying that the present invention is not limited to the above embodiments, and that various modifications can be made without departing from the spirit of the invention.

"Effects of the Invention" As detailed above, according to the present invention, it is possible to provide a magnetic recording and reproducing device that has a simple configuration and is made as compact and lightweight as possible. .

[Brief explanation of the drawing]

1 and 2 are explanatory diagrams showing the configuration of a magnetic recording/reproducing apparatus according to an embodiment of the present invention, and FIGS. 3 and 4 are detailed configuration diagrams showing the main parts of FIGS. 1 and 2, respectively. figure,
FIG. 5 is a side view of FIGS. 3 and 4. FIG. 10...Chassis, 11...Cabinet, 12...
・Cylinder, 13...Loading ring, 14゜1
5...first and second drive gears, 16 to 18...
First to third gears, 19... capstan, 20.
... Fourth gear, 21... Motor, 22... Drive source gear, 23 to 25... Fifth to seventh gear, 26.
...Cassette loading lever, 27...Engaging protrusion, 28,...Cassette holder, 29 to 32...First to fourth links, 33...Tape cassette, 34
... Bucket part, 35.36 ... Guide rail, 37
...Shifter part, 38...Concave part, 39A, 40A...
・Upper reel stand, 39B, 40B...Lower reel stand, 41A, 41B, 42A, 42B...Gear, 43
A...8th gear, 43B...9th gear, 44.
... Oscillating member, 45... 10th gear, 46.47.
... Pulley, 48... Belt, 49... First slider, 50 Tension arm, 51... Opening, 5
2...Second slider, 53...Pinch roller,
54...Pinch lever, 55...Drawer member, 56
．． 57...Guide, 58...Magnetic tape, 59...
-Return guide, 60...first inclined guide, 61
...first guide post, 62...guide, 63.
...Fixed guide, 64...Erasing head, 65...
Fixed guide portion, 66...Second inclined guide, 67...
・Second guide.

Claims (1)

[Claims] In a magnetic recording and reproducing device in which a magnetic tape wound around a tape cassette housed in a cassette holder is pulled out and mounted on a cylinder, the cassette loading mechanism moves the cassette holder in correspondence with the cylinder; a pair of first reel pedestals disposed on the cassette holder in correspondence with the first reel pedestals; Said first
1. A magnetic recording and reproducing device comprising: a second reel base portion into which the reel base portions are combined and separated;