JPH0845138A - Reel stand device of magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To obtain a reel stand device of magnetic recording/reproducing device suitable for the miniaturization by unnecessitating the moving space of a reel stand driving motor for rotating a pair of reel stands. CONSTITUTION:The reel stands 60s, 60t are pivotally supported by a pair of reel stand bases 30s, 30t, and these reel stand bases 30s, 30t are rotated on a chassis 20 by the driving force of a motor 50 for turning to make the space of centers of a pair of reel stands 60s, 60t move between two positions of large space position and small space position. On the other hand, the reel stand driving motors 35s, 35t are rigidly fixed to the chassis 20, and intermediate idles 63s, 63t fixed to rotary shafts of these reel stand driving motors 35s, 35t are respectively meshed with tooth parts 62s, 62t of the reel stands 60s, 60t, and also these idlers are arranged coaxially with the turning center shaft of a pair of reel stand bases 30s, 30t.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reel stand apparatus for a magnetic recording / reproducing apparatus, and more particularly to a reel stand apparatus which uses two types of tape cassettes of different sizes.

[0002]

2. Description of the Related Art As a conventional example of a magnetic recording / reproducing apparatus equipped with this type of reel stand apparatus, as described in Japanese Patent Application Laid-Open No. 2-270152, a plurality of types of tape having different reel center distances are used. It is known to linearly reciprocate the positions of a pair of reel stands corresponding to a cassette.

FIG. 5 is a plan view showing a schematic structure of the reel base device described in the above publication, and FIG. 6 is a sectional view thereof. In these drawings, 1 indicates a chassis, and a pair of upper and lower surfaces of the chassis 1 are shown. Guide shafts 2s and 2t are arranged in a substantially eight shape, and guide rail shafts 3s and 3t are arranged in parallel with the pair of guide shafts 2s and 2t, respectively. Reference numerals 5s and 5t denote reel bases. A guide shaft insertion hole 6 is provided on each one side of the pair of reel bases 5s and 5t. The guide shaft insertion hole 6 has a pair of guide shafts 2s and 2t. Are inserted respectively. A guide guide groove 13 is provided on each of the other side portions of the pair of reel bases 5s and 5t, and the cylindrical roller 7 is engaged with the guide guide groove 13 and the center hole 8 of the cylindrical roller 7 is formed. The pair of guide rail shafts 3s, 3
Each t is inserted. Reference numeral 10 denotes a reel base driving motor. The reel base driving motor 10 is fixed to the lower surface sides of the pair of reel bases 5s and 5t, and the reel base 12s is attached to the rotary shaft 11 of the reel base driving motor 10. , 12t are rotatably engaged with each other.

In the reel stand device having the above-mentioned general structure, the pair of reel stand bases 5s and 5t are indicated by a large gap position shown by a solid line in FIG. 5 and a chain double-dashed line by a slide force transmission mechanism (not shown). It linearly reciprocates between two positions, which are the small interval position shown. When using a large cassette, a pair of reel bases 5s, 5t
Is positioned at the large interval position shown by the solid line in FIG. 5, and the reels of the large cassette are mounted on the pair of reel stands 12s and 12t. When using a small cassette, the pair of reel bases 5s and 5t are positioned at small intervals indicated by the two-dot chain line in FIG. 5, and the reels of the small cassette are mounted on the pair of reel bases 12s and 12t. To be done.

[0005]

However, in the conventional reel stand apparatus configured as described above, the pair of reel stand bases 5s and 5t reciprocates between two positions of the large gap position and the small gap position. When moving, the reel base driving motor 1 fixed to the reel bases 5s and 5t
Since 0 also moves with the reel bases 5s and 5t, it is necessary to provide a long hole in the chassis 1 to secure a space for moving the reel base driving motor 10. For this reason, the elongated hole of the chassis 1 becomes a dead space in which parts cannot be mounted, and there is a drawback that the magnetic recording / reproducing apparatus including the reel stand apparatus becomes large in size.

The present invention has been made in view of the circumstances of the prior art as described above, and an object thereof is to make a moving space of a reel base driving motor for rotating a pair of reel bases unnecessary, which is suitable for miniaturization. It is to provide a reel stand device of a magnetic recording / reproducing apparatus.

[0007]

In order to achieve the above object, the present invention provides a pair of reel bases provided so as to reciprocate with respect to a chassis, and drive means for driving these reel bases. A stopper for restricting a moving range of the pair of reel bases, a reel base rotatably supported by the pair of reel bases, and a reel base driving motor for rotationally driving the reel bases,
In the reel stand device of the magnetic recording / reproducing apparatus, the center interval of the pair of reel stands is varied between two positions, a large interval position and a small interval position, by moving the pair of reel stand bases between the stoppers, The pair of reel bases are rotatably provided on the chassis, and the reel base driving motor is fixed to the chassis,
In addition, an intermediate idler for transmitting the rotational force from the reel base driving motor to the reel base is provided coaxially with the rotation center axis of the pair of reel bases, respectively.
It has the most main feature.

[0008]

When a large cassette is used, the pair of reel bases are rotated to position the pair of reel bases at large intervals, and the reels of the large cassette are mounted on the pair of reel bases. When a small cassette is used, the pair of reel bases are rotated to position the pair of reel bases at small intervals, and the reels of the small cassette are mounted on the pair of reel bases.

When the reel stand drive motor fixed to the chassis rotates while the large cassette or the small cassette is mounted, this rotating force is rotatably supported by the pair of reel stand bases via the intermediate idlers. Be transmitted to. Here, since the pair of intermediate idlers are arranged coaxially with the rotation center axis of the reel base, and the distance from the center of the reel base at the two positions is set to be equal, the large interval position and the small interval position are set. Thus, a constant rotational force is transmitted from the reel base driving motor to the reel base. In addition, since the reel base driving motor is fixed to the chassis and the rotational force of the motor is transmitted to the reel base via an intermediate idler arranged coaxially with the rotation center axis of the reel base, the reel base drive is driven. The moving space of the motor for use becomes unnecessary, and the mounting density of components can be increased.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 is a plan view of a reel stand apparatus according to a first embodiment of the present invention, and FIG. 2 is a sectional view taken along the line AA of FIG. 1. In these figures, corresponding members on the supply side and the winding side are shown. , The letters s and t of the alphabet are added to the end of the same symbols as necessary.

As shown in FIGS. 1 and 2, a pair of guide rail members 21s and 21t are arranged on the upper surface of the chassis 20. These guide rail members 21s and 21t are formed by using screws 22, 23 and 24. It is fixed to the chassis 20. The guide rail members 21s and 21t are arcuate in plan view, and the guide rail members 21s and 21t are
A lower surface portion 25 and an upper surface portion 26 that face each other with a guide supporting space 27 in between are formed in the guide supporting space 2.
Both ends of 7 are stoppers 46 and 48, respectively.
Leaf springs 28 and 29 are installed at two locations on the upper surface portion 26, and these two locations correspond to a location where the center spacing of the reel stand, which will be described later, corresponds to a large spacing position and a location where the center spacing of the reel base reaches a small spacing position. A pair of reel bases 30s, 30t are arranged on the upper surface of the chassis 20, and one end of the reel bases 30s, 30t has an insertion hole 31 in a direction perpendicular to the reference plane of the chassis 1. Is provided,
Feet 43 and 44 are projectingly provided on the lower surfaces of the other ends of the reel bases 30s and 30t. Both side surfaces of the reel bases 30s and 30t are position regulation surfaces 45s and 45t and position regulation surfaces 47s and 47t, respectively, and one of the position regulation surfaces 45s and 45t is formed on the guide rail members 21s and 21t. Can contact the stopper 46,
The other position regulating surfaces 47s and 47t can contact another stopper 48.

On the other hand, a reel motor assembly 34 having a pair of reel base driving motors 35s and 35t is fixed to the lower surface of the chassis 20 by using screws 36. These reel base driving motors 35s and 35t are fixed. The reel stand bases 30s and 30t are provided on the housing outer peripheral portion 37
The insertion holes 31 are engaged with each other in a rotatable manner. In addition, reel stand base rotating members 38s and 38t are mounted on the reel stand bases 30s and 30t, respectively, and these reel stand base rotating members 38s and 38t.
Is rotatably inserted into the outer peripheral wall of the insertion hole 31 of the reel base 30s, 30t, and is prevented from falling off from the reel base 30s, 30t by the pair of tabs 40, 41. These reel base rotating members 38s, 38
Teeth 55s and 55t are formed at one end of t,
These tooth portions 55s and 55t mesh with the output side gear bodies of the turning power transmission mechanism, which will be described later, respectively, and the reel base rotating members 38s and 3t are output by the turning power transmission mechanism.
8t is designed to rotate. Further, the reel bases 30s and 30t and the reel base rotating member 38
A coil spring 42 is interposed between the reel bases 30s and 30t.
t and the reel base rotating members 38s and 38t are pressed in a direction in which they are separated from each other in a plane parallel to the reference plane of the chassis 1.

The pair of reel bases 30s, 30t
When pressed by the reel stand base rotating members 38s and 38t via the coil spring 42, they rotate about the housing outer peripheral portion 37 of the reel stand drive motors 35s and 35t while being positioned at the target position. . At that time, the reel bases 30s and 30t rotate while the legs 43 and 44 slide on the lower surface 25 of the guide rail members 21s and 21t, and the one position regulating surfaces 45s and 45t.
Of the guide rail members 21s and 21t contacting the stopper 46 at large intervals (solid line position in FIG. 1) and the other position regulating surfaces 47s and 47t contacting the stopper 48 at small intervals (two-dot chain line position in FIG. 2). Move between and. Also, at these large and small intervals, the reel stand base 3
At 0s and 30t, the center of the upper surface portion 33 is elastically contacted with the leaf spring 28 or the leaf spring 29, and the resilient force of these leaf springs 28 and 29 is applied to the upper surface of the chassis 20.

The turning power transmission mechanism includes a turning motor 50 and a pair of gear bodies 52s and 52t, and the turning motor 50 is fixed to the upper surface of the chassis 20. A worm gear 51 is fixed to the rotating shaft of the rotating motor 50, and the worm gear 51 has the worm gear 51.
The 2s and 52t helical gears 53s and 53t mesh with each other, and further, the small tooth portion 54 of the gear bodies 52s and 52t.
s, 54t, the reel base rotating member 38s,
The 38t tooth portions 55s and 55t are in mesh with each other.

For example, in the rotation from the small interval position (two-dot chain line position in FIG. 1) to the large interval position (solid line position in FIG. 1), the rotational force of the rotating motor 50 causes the worm gear 51 and the gear body 5 to rotate.
2s, 52t and reel base rotating member 38s,
38t, and the pair of reel bases 30s, 3
0t respectively rotates in the arrow direction of FIG. Then, when the pair of reel bases 30s, 30t are rotated to the large distance position, the position limit surfaces 45s, 45t of the reel bases 30s, 30t come into contact with the stoppers 46 of the guide rail members 21s, 21t to reach the positions. Although stopped, the rotation motor 50 is rotated for a fixed time thereafter, and the reel base rotation members 38s and 38t are respectively displaced by a fixed distance in the arrow direction. Due to this displacement, the reel stand base 30
s, 30t and reel base rotating members 38s, 38t
Causes the coil spring 42 to be compressed, the reel base 3
0s and 30t are positioned at large intervals with the spring force of the coil spring 42 acting. Further, since the reel bases 30s and 30t receive the elastic biasing force from the leaf spring 28 and are supported at three points by the both feet 43 and 44 and the rotation fulcrum 56, the posture can be accurately determined. The rotation from the large-interval position to the small-interval position is also performed in substantially the same manner.

On the other hand, the pair of reel bases 30s,
Reel stands 60s and 60t are respectively arranged on the 30t, and the reel stands 60s and 60t are rotatably supported on the reel stand bases 30s and 30t by rotating shafts 61s and 61t. These reel bases 60s and 60t have tooth portions 62s and 62t, and the tooth portions 62s and 62t mesh with the intermediate idlers 63s and 63t fixed to the rotation shafts of the reel base driving motors 35s and 35t. Therefore, the outputs of the reel base driving motors 35s and 35t are supplied to the reel base 60 via the intermediate idlers 63s and 63t.
s, 60t. These reel stands 60s, 60
t rotates together with the respective reel bases 30s and 30t, and the center interval of the pair of reel bases 60s and 60t at the large interval position is the center interval of the pair of reels of the large cassette (not shown), and the pair of reels at the small interval position. The center intervals of the stands 60s and 60t match the center intervals of a pair of reels of a small cassette (not shown), and at the two positions of the large interval position and the small interval position, the center of the reel tables 60s and 60t and the reel table drive It is equidistant from the centers of the motors 35s and 35t. In the case of this embodiment, a pair of intermediate idlers 63s, 63s
A pair of reel stands 6 at a small distance between the centers of t
The distance between the centers of 0s and 60t is set to be equal.

Next, the operation of the reel stand apparatus according to the present embodiment constructed as described above will be described. When the large cassette is inserted from the cassette insertion port when the pair of reel bases 60s and 60t are in the small distance position shown by the chain double-dashed line in FIG. 1, it is detected that the large cassette is the pair of reel bases. 30s and 30t are rotated in the direction of the arrow in FIG. 1 by the rotating power transmission mechanism, and the pair of reel stands 60s and 60t are rotated from the small interval position shown by the chain double-dashed line in FIG. 1 to the large interval position shown by the solid line. It In this way, the pair of reel stands 60
When the s and 60t are rotated to the large spacing position, the large cassette is loaded with a predetermined load and the pair of reel stands 60s and 6t are
The pair of reels of the large cassette descends from above 0t and is mounted on the reel stands 60s and 60t, respectively. When this mounting is completed, tape loading is performed, and after that,
When each traveling mode is selected, the reel base driving motor 3
5s and 35t rotate at a predetermined speed. The rotational force of the reel base driving motors 35s and 35t is transmitted to the intermediate idlers 63s and 63t, and the reel bases 60s and 60t rotate at a predetermined speed.

On the contrary, a pair of reel stands 60s,
When the small cassette is inserted from the cassette insertion port when 60t is at the large interval position shown by the solid line in FIG. 1, it is detected that the small cassette is the small cassette, and the pair of reel bases 30s, 3s.
0t is rotated in the direction opposite to the arrow in FIG. 1, and the pair of reel stands 60s and 60t are rotated to the small interval position shown by the chain double-dashed line in FIG. Then, in the same manner as described above, a pair of reels of the small cassette is mounted on the reel bases 60s and 60t, respectively, and the reel bases 60s and 60t are rotated by the driving force of the reel base drive motors 35s and 35t, respectively.

In the above embodiment, since the reel base driving motors 35s and 35t are located equidistant from the centers of the reel bases 60s and 60t at the two positions of the large space position and the small space position, respectively. Regardless of the position, a constant driving force can be transmitted to the reel stands 60s, 60t via the intermediate idlers 63s, 63t. Further, since the reel stand drive motors 35s and 35t are not fixed to the pair of reel stand bases 30s and 30t,
It is not necessary to secure a movement space for the motors 35s and 35t, and other components can be mounted using this movement space. The driving force of the rotation motor 50 is transmitted to the reel bases 30s and 30t via the reel base rotation members 38s and 38t, and the reel base rotation members 38s and 38t and the reel base 30 are rotated.
Since the coil springs 42 are interposed between the s and 30t, the pair of reel bases 30s and 30t can be positioned at the large spacing position or the small spacing position while the spring force of the coil springs 42 acts. . Furthermore, since the center-to-center distance between the pair of intermediate idlers 63s and 63t is set to be equal to the center-to-center distance between the pair of reel stands 60s and 60t at the small-interval positions, the size shown in FIGS. The reel motor assembly 34 used in the magnetic recording / reproducing apparatus compatible with the two cassettes can be directly applied to the magnetic recording / reproducing apparatus compatible with only the small cassette,
Parts can be shared.

FIG. 3 is a plan view of a reel stand apparatus according to a second embodiment of the present invention, and FIG. 4 is a sectional view taken along the line BB of FIG. 3, and parts corresponding to FIGS. The same reference numerals are attached. This embodiment is different from the first embodiment described above in that instead of using a pair of reel base driving motors 35s and 35t, one reel base driving motor 74 selectively rotates the intermediate idlers 63s and 63t. This is because the reel bases 30s and 30t are basically the same in other configurations including the rotational power transmission mechanism. That is, the reel base driving motor 74 is fixed to the upper surface of the chassis 20, and the reel base driving motor 74 is fixed.
The rotating shaft of the above reaches the lower surface of the chassis 20, and the pulley 73 is fixed to the rotating shaft. Also, a pair of intermediate idlers 6
A swing idler 70 is disposed between the 3s and 63t, and one end of the swing idler 70 is pivotally supported by the chassis 20 together with the subordinate pulley 71. Further, a timing belt 72 is wound between the subordinate pulley 71 and the pulley 73. Therefore, the rotational force from the reel base driving motor 74 is selectively transmitted to the pair of intermediate idlers 63s and 63t via the pulley 73, the timing belt 72, the subordinate pulley 71, and the swing idler 70, thereby, A pair of reel stands 60s,
60t rotates selectively.

For example, the reel base driving motor 74 is shown in FIG.
3 rotates in the same direction as the pulley 73, the timing belt 72, and the subordinate pulley 71, the swing idler 70 moves in the direction of the arrow Q in FIG. 3 due to the moment due to the rotational torque of the subordinate pulley 71. The idler 70 swings to the middle idler 6 on the winding side.
It meshes with the 3t tooth. Therefore, in this case, the rotational force from the reel base driving motor 74 is transmitted to the reel base 60t via the pulley 73, the timing belt 72, the subordinate pulley 71, and the swing idler 70. Similarly, when the reel base driving motor 74 rotates in the direction opposite to the arrow P direction, the swing idler 70 meshes with the tooth portion of the supply side intermediate idler 63s, and in this case, the rotation from the reel base driving motor 74 occurs. The force is the pulley 73, the timing belt 72, the subordinate pulley 71, and the swing idler 7.
It is transmitted to the reel stand 60s via 0.

As described above, also in this embodiment, the intermediate idlers 63s and 63t are irrespective of the positions of the two positions.
A constant driving force can be transmitted to the reel stands 60s and 60t via the. Also, a pair of reel bases 30
Since the reel base driving motor 74 is not fixed to s and 30t, it is not necessary to secure a movement space for the motor 74, and other components can be mounted using this movement space.

[0023]

As described above, according to the present invention,
A pair of reel bases are rotatably mounted on the chassis, a reel base driving motor is fixed to the chassis, and a reel base driving motor is coaxial with the rotation center axis of the pair of reel bases. Since the intermediate idlers for transmitting the rotational force from the to the reel stand are provided respectively, the space for moving the reel stand drive motor is not required, and the mounting density of components can be increased and the magnetic recording / reproducing apparatus can be downsized.

[Brief description of drawings]

FIG. 1 is a plan view of a reel stand device according to a first embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a plan view of a reel stand device according to a second embodiment of the present invention.

4 is a cross-sectional view taken along the line BB of FIG.

FIG. 5 is a plan view of a reel stand device according to a conventional example.

FIG. 6 is a cross-sectional view of the reel stand device.

[Explanation of symbols]

 20 chassis 21s, 21t guide rail member 25 lower surface part 26 upper surface part 27 guide support space 28, 29 leaf spring 30s, 30t reel stand base 31 insertion hole 34 reel motor assembly 35s, 35t, 74 reel stand drive motor 37 housing outer peripheral part 38s, 38t Reel base rotation member 40, 41 Claw 42 Coil spring 43, 44 Legs 45s, 45t, 47s, 47t Position regulation surface 46, 48 Stopper 50 Rotation motor 51 Worm gear 52s, 52t Gear body 53s, 53t Gear 54s. 54t Small tooth part 55s, 55t, 62s, 62t Tooth part 60s, 60t Reel stand 61s, 61t Rotating shaft 63s, 63t Intermediate idler 70 Swing idler 71 Dependent pulley 72 Timing belt 73 Pulley

Claims (5)

[Claims] 1. A pair of reel bases provided so as to be reciprocally movable with respect to a chassis, a drive means for driving the reel bases, a stopper for restricting a moving range of the pair of reel bases, A pair of reel stand bases, each of which is rotatably supported by a reel stand; and a reel stand drive motor that rotationally drives these reel stands.
In the reel stand device of the magnetic recording / reproducing apparatus, the center interval of the pair of reel stands is varied between two positions, a large interval position and a small interval position, by moving the pair of reel stand bases between the stoppers, The pair of reel stand bases are rotatably provided on the chassis, the reel stand driving motor is fixed to the chassis, and coaxially with the rotation center axes of the pair of reel stand bases. A reel mount device for a magnetic recording / reproducing apparatus, characterized in that an intermediate idler for transmitting a rotational force from the reel mount drive motor to the reel mount is provided. 2. The reel base driving motor according to claim 1, wherein the reel base driving motors are provided coaxially with the rotation center axes of the pair of reel bases, and the rotary shafts of the reel base driving motors are connected to the intermediate idler. A reel stand device of a magnetic recording / reproducing apparatus, characterized in that 3. The swing idler according to claim 1, wherein a swing idler that selectively meshes with the pair of intermediate idlers is provided.
A reel stand apparatus for a magnetic recording / reproducing apparatus, characterized in that the rotational force from the reel stand drive motor is selectively transmitted to one of the intermediate idlers via the swing idler. 4. The magnetic recording / reproducing apparatus according to claim 1, wherein the center-to-center distance between the pair of intermediate idlers is set to be equal to the center-to-center distance between the pair of reel stands at the small interval position. Reel stand device. 5. The rotating member according to claim 1, wherein the rotating members are provided coaxially with the rotation center axes of the pair of reel bases, and a coil spring is interposed between the rotating members and the reel bases. A reel base device of a magnetic recording / reproducing apparatus, wherein the drive force from the drive means is transmitted to the reel base by way of the rotating member and the coil spring.