JPS6238548A - Reel turn table device - Google Patents

Abstract

PURPOSE:To make a magnetic recording and reproducing device small in size and light in weight by using a magnet member to join selectively in one body a reel turn tables which are arranged freely separatably. CONSTITUTION:When upper and lower reel turn tables 39A and 39B are joined in one body, the tenth gear 45 is engaged with the ninth gear 43B which is engaged with a gear 41B of the lower reel base part 39B to transmit the rotating force when a tape is run at a high speed, and the gear 45 is rotated at a high speed to run the tape at a high speed. A reel turn table is arranged divisionally in upper and lower reel turn tables 39A and 39B, and they are joined selectively with the first and second magnet members 39F and 39L, and a cassette holder 28 is so arranged that it can be freely taken into and out of a cabinet 11. Thus, the magnetic recording and reproducing device is made small in size and light in weight as much as possible with the simple constitution.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a reel stand 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
At present, by using tape cassettes, which are approximately 174 times smaller in shape than conventional 1/2-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 VTR, it is strongly requested that each mechanical part including the reel stand device be improved to be suitable for downsizing and weight reduction, and improving handling including portability as much as possible. has been done.

[Object of the invention] This invention was made in view of the above circumstances,
It is an object of the present invention to provide a reel stand device that has a simple configuration and can contribute to making a magnetic recording/reproducing device as compact and lightweight as possible.

[Summary of the Invention] That is, the present invention enables a cassette holder to be freely disposed in and out of a cabinet by configuring the reel base portions that are disposed to be freely separable to be selectively combined using a magnetic member. The present invention can be applied to magnetic recording and reproducing devices that promote downsizing and weight reduction, and has achieved the intended purpose.

[Embodiments of the Invention] First, before explaining the present invention in detail, a magnetic recording/reproducing apparatus to which the present invention is applied will be explained.

FIG. 1 and FIG. 2 respectively show the state before loading (in other words, unloading is completed) and the loading is completed (in other words, before unloading) of the magnetic recording/reproducing apparatus to which the present invention is applied.

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)
Second drive gears 15 for driving are meshed with each other. The first and second drive gears 14 and 15 are connected to the first drive gear 14 or the fourth gear 20 whose central axis is the capstan 19 via the first to third gears 16 to 18.
This fourth gear 20 is meshed with a drive source gear 22 fitted onto the rotating shaft of the motor 21 . Further, the second driving gear 15 is meshed with a seventh gear 25 via fifth and sixth gears 23 and 24.

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 recess 38 from which the reel is removed is formed, and a pair of upper reel stands 39A and 40A for supply and winding are provided approximately in the center of the recess 38.
has been done. These upper reel stand parts 39A and 40A are the fifth
As shown in the figure, lower reel stand parts 39B and 40B for supply and winding are arranged at predetermined positions on the chassis 10.
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 through the swinging member 44 to the clock and counterclockwise direction 1-1 in the figure.
The direction of rotation is biased. And this tenth gear 4
5 is coaxially formed with a pulley 46, and this pulley 46
is connected via a belt 48 to a pulley 47 formed coaxially with the drive source gear 22 so as to be capable of transmitting rotational force.

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,
The pinch lever 54 and the pull-out member 55 include a first slider 50 and a tension lever 51 disposed on the inlet side of the cylinder 12, each of which has guides 56 and 57 that are rotatable approximately perpendicularly to the chassis 10. be done. A second slider 52 disposed on the exit side of the cylinder 12 has a return guide 5 which is rotatable in response to a magnetic tape 58 wound diagonally around the cylinder 12.
9. A first inclined guide 60 for regulating an inclination angle and a first guide rod 1 for regulating an angle of tape winding are respectively installed upright. Further, the pinch roller 53 of the pinch lever 54 and the rotatable guide 62 for guiding the tape, which are 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 on the tape bus at a predetermined interval.
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
As shown in FIG. 1, first and second sliders 49, 52, a guide 57 of the tension lever 50, and a pinch roller are attached to the opening 51 of the tape cassette 33. 53 and a guide 62 of 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 drawing. Then, the rotational force of this motor 21 is applied to the drive source gear 22, the fourth to first gears 20°18 to 16, and the first drive gear 1.
4, the loading ring 13 is rotationally driven in the counterclockwise direction in the figure, and this loading ring 13 is interlocked with the rotation to drive the second drive gear 15, fifth and sixth gears 2.
3. The seventh gear 25 is rotationally driven in the counterclockwise direction in the figure via the gear 3.24. 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,
The engagement protrusion 27 of the cassette loading lever 26 is disengaged from the recess 38 of the shifter 37, and the cylinder 12 is positioned so as to fit into the opening 51 of the tape cassette 33 (see FIG. 2). At the same time, upper reel stand parts 39A, 4
0A is the lower reel stand part 39B.

40B to complete cassette loading (see FIG. 5). Here, the first and second sliders 4 accommodated in the opening 51 of the tape cassette 33 are
9, 52, the tension lever 50, the pinch roller 53, and the drawer member 55, among which the first and second sliders 49, 52 respectively lock the magnetic tape 58 in conjunction with the rotation of the loading ring 13 to load the tape. At the same time, the guide 57 of the tension lever 50, the pinch roller 53 of the pinch lever 54, and the guide 62 of the drawer member 55 are rotated corresponding to the first and second sliders 49 and 52, respectively, so that the cassette tape 33 The magnetic tape 58 wound around the magnetic tape 58 is placed on a tape bus. As a result, the magnetic tape 58 is pressed against 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 tape is run in conjunction with the rotational drive of 40A, and recording or reproduction is performed.

Further, when the eject key (not shown) is operated in the above-described 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 tape 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 can be detached 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 swinging member 44, the eighth gear 43A, and the gear 42A, and winding of the tape corresponding to the above-mentioned unloading 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.

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

FIG. 6 shows a reel stand device according to an embodiment of the present invention applied to the magnetic recording/reproducing apparatus, in which (a) shows the combined state and (b) shows the separated state. However, since each of the reel stands on the supply and take-up sides are configured in substantially the same way, for convenience, one will be explained as a representative, and
The same parts as those of the magnetic recording/reproducing apparatus are designated by the same reference numerals, and the explanation thereof will be omitted.

That is, the upper and lower reel stand portions 39A.

39B are installed in the cassette holder 28 and the chassis 10, respectively. Of these, the lower reel stand part 39B
The gear 41B for running the tape at high speed is integrally formed with the reel shaft 39C, and is rotatably attached to the reel shaft 39C implanted in a predetermined position of the chassis 10 using a retaining ring 39D. For example, a hexagonal column-shaped sliding portion 39E is formed at the upper end of the lower reel stand portion 39B.
For example, a conical first magnet member 39F is attached to E so as to be movable in the axial direction. This first magnet member 39F is magnetized in the axial direction, and a fitting portion 39G is formed at its tip, as shown in FIG. 7. Further, at the upper end of the lower reel stand portion 39B, an attraction member 39H for forming a magnetic clutch formed of a magnetic material such as iron material, for example.
is attached.

On the other hand, the upper reel stand 39A has a spring 39 at its upper end.
1, a hub holder 39J is attached using a retaining ring 39K, and a second magnet member 39 made of a plastic magnet is attached to the lower end of the retaining ring 39K, for example, as shown in FIG.
L is attached. The second magnet member 39L has a fitting part 39M formed at the lower end thereof in the approximate center corresponding to the first magnet member F, and the surrounding part thereof is radially polarized into six poles in the axial direction. It is magnetized.

The gear 41A, which is made of a magnetic material and is used for driving the tape to travel at a constant speed, is attached between the second magnet member 39L and the lower reel stand 39B via a spacer 39N.

That is, the reel stand device is connected to the cassette holder 2.
8 is in a state before cassette loading as shown in FIG. 1, the upper reel stand 39A is separated from the lower reel stand 39B and separated from each other, and the cassette holder 28 is loaded to complete the cassette loading as shown in FIG. Then, the first magnet member 39F of the lower reel stand 39B connects with the second magnet member 3 of the upper reel stand 39A.
9L and are combined by mutual magnetic force. Therefore, when the tape runs at a constant speed for recording and reproducing, the eighth gear 43A, which is meshed with the gear 41A of the upper reel stand 39A so as to transmit driving force, is connected to the tenth gear.
The gears 45 (see FIGS. 1 and 2) are meshed to transmit driving force from a driving source (not shown). Then, as the gear 4'IA rotates, an eddy current is generated in the attraction member 39H, and due to the interaction thereof, the lower reel base portion 39B is brought into a so-called sliding state.

As a result, the upper reel stand portion 39A is rotationally driven with a desired constant torque to cause the tape to run at a constant speed.

Moreover, the above-mentioned upper and lower reel stand portions 39A.

39B, the tenth gear 45 meshes with the ninth gear 43B, which is meshed with the gear 41B of the lower reel stand 39B so as to transmit rotational force when the tape runs at high speed.
(See FIGS. 1 and 2) are meshed and driven to rotate at high speed, causing the tape to run at high speed.

In addition, in the reel stand device, when the cassette holder 28 is unloaded as described above, the eighth gear 43A meshed with the gear 41A is rotationally driven by the tenth gear 45, and the tape winding corresponding to the movement is performed. It is controlled to carry out the acquisition.

In this way, the reel stand device is configured to be divided into the upper and lower reel stand parts 39A and 39B, which can be selectively combined using the first and second magnet members 39F and 39L. Place the cassette holder 28 in cabinet 1.
By arranging it so that it can move in and out of 1, it can contribute to improving the degree of freedom in designing the magnetic recording and reproducing device, which promotes miniaturization and weight reduction.

Furthermore, although the present invention has been described in the above embodiment as applied to an 8 mm video tape recorder using an 8 mm video tape cassette, the present invention is not limited to this, and can be applied to a video tape recorder using a 1/2 inch tape cassette. 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, there is provided a reel stand device that has a simple configuration and can contribute to making the magnetic recording and reproducing device as compact and lightweight as possible. can be provided.

[Brief explanation of the drawing]

1 and 2 are configuration explanatory diagrams showing a magnetic recording and reproducing apparatus to which the present invention is applied, and FIGS. 3 and 4 are detailed configuration diagrams showing the main parts of FIGS. 1 and 2, respectively. Fifth
The figure is a side view of FIGS. 3 and 4, FIG. 6 is a configuration explanatory diagram showing a reel stand device according to an embodiment of the present invention, and FIG. 7 is a detailed diagram showing the main part of FIG. 6. . 10...Chassis, 11...Cabinet, 12.
...Cylinder, 13...Loading ring, 14°15...First and second drive gears, 16 to 18...
・First to third gears, 19... Capstan, 20
... Fourth gear, 21... Motor, 22... Drive source gear, 237'J 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... Recessed part, 39A, 40A
... Upper reel stand part, 39B, 40B... Lower reel stand part, 41A, 41B, 42A, 42B... Gear,
43A...8th gear, 43B...9th gear, 4
4... Oscillating member, 45... 10th gear, 46.4
7... Pulley, 48... Belt, 49... First slider, 50 Tension arm, 51... Opening,
52... Second slider, 53... Pinch roller, 54... Pinch lever, 55... Drawer member, 5
6.57...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...
2nd guide, 39C... Reel shaft, 39D... Retaining ring, 39E... Sliding part, 39F... First magnet member, 39G... Fitting part, 39H... Suction Part, 391...Spring, 39J...Hub holder, 39
K... Retaining ring, 39L... Second magnet member,
39M...Mating part, 39N...Spacer. Applicant's agent Patent attorney Takehiko Suzue (a) (b) Figure 5 10 Chassis (a) Figure 6

Claims (1)

[Claims] A reel stand device that rotates and drives a hub part of a tape cassette on which a magnetic tape is wound to cause the tape to travel, includes a first reel stand that is rotatably provided with respect to a reel axis, and a first reel stand that is connected to the hub part. The above-mentioned first
a second reel stand provided so as to be movable toward and away from the reel stand, and a first magnet provided movably in the axial direction on either one of the first and second reel stands. member, and a second magnet member that is provided in correspondence with the first magnet member so as to be freely connectable to the other of the first and second reel base parts,
A reel stand device characterized in that the reel stand portions of the reel stand are configured to be selectively combined by coupling the first and second magnet members.