JP2642238B2 - Loading post drive - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a loading post drive device in a magnetic recording / reproducing device.

2. Description of the Related Art In a conventional magnetic recording / reproducing apparatus, a connection between a loading boat provided with a loading post and a loading ring is generally performed via a relay link in order to provide a degree of freedom in a moving path of the loading boat. Met.

For example, as shown in FIG. 15, in a loading device in which a supply-side ring gear 91 and a take-up-side ring gear 92 having substantially the same size are arranged substantially concentrically on top of one another, a supply-side loading post Supply boat with 93
Take-up boat with take-up loading post 95 and take-up loading post 95
In order to guide 96 along the supply-side loading guide 97 and the take-up loading guide 98, respectively, taking into account the movement path of each boat 94, 96, each ring gear 92, 92 and each boat, 94,96 relay links
They are linked via 99,100.

Problems to be Solved by the Invention According to the conventional configuration as described above, the number of components increases accordingly, and there is a problem in assemblability, and there remains a problem in reducing the size, weight, and thickness of the magnetic recording / reproducing apparatus. Met.

An object of the present invention is to solve the above-mentioned problem, and to provide a loading post drive device which can improve the assemblability by eliminating a relay link and can contribute to the reduction in size, weight, and thickness of a magnetic recording / reproducing device. Things.

Means for Solving the Problems In order to solve the above problems, a loading post drive device of the present invention includes a supply side loading ring for driving a supply side loading post and a winding for driving a winding side loading post. A supply-side boat and a take-up-side loading guide having a supply-side loading post and a supply-side boat movable along the supply-side loading guide and having a supply-side loading post. A drive shaft for engaging and directly driving the take-up boats that can move along the shore is fixed to the respective loading rings, and the movement trajectory of the boat guided along the respective loading guides And the rotation locus of the drive shaft of each loading rig It is composed.

Operation According to the above configuration, the rotation trajectory of the drive shaft fixed to the loading ring and the movement trajectory of the loading boat guided along the loading guide coincide with each other, so that the drive shaft engages with each boat. In addition to being able to drive this directly, stable movement along the loading guide of each boat is possible, so that the conventional relay link can be eliminated. In addition to improving the performance, it is also useful for reducing the size, weight, and thickness of the magnetic recording / reproducing apparatus.

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

1 and 2 are plan views before and after tape loading of a loading post drive unit in a magnetic recording and reproducing apparatus according to one embodiment of the present invention, and FIGS. 3 and 4 show the same by the loading post drive unit. FIG. 5 is a schematic plan view illustrating a tape path and a perspective view illustrating a main part of the tape path. FIGS. 5 and 6 are perspective views illustrating main parts of the loading post driving device.

First, an outline of the operation of the loading post will be described with reference to FIGS. In FIGS. 3 and 4, 1
A chassis 2 is a tape cassette mounted on the chassis 1, and a supply reel 3 and a take-up reel 4 are disposed in the tape cassette 2. When the tape cassette 2 is mounted on the chassis 1, the supply-side loading roller post 8, the tension post 9, and the first and second winding portions are formed in the cutouts 5, 6, 7 formed on the front surface of the tape cassette 2. The side loading roller posts 10, 11 and the pinch roller 12 are inserted inside the magnetic tape 13, respectively. 14,1
Reference numeral 5 denotes a supply boat and a take-up boat on which the supply-side loading roller post 8 and the first and second take-up loading roller posts 10, 11 are mounted.
Is provided with an inclined post 16 in addition to the supply-side loading roller post 8, and is inserted into the cutout 5 together with the supply-side loading post 8. 17, 18 are the supply boats during the loading operation as shown in FIGS.
An arc-shaped supply-side loading guide and a winding-side loading guide for guiding the winding boat 14 and the winding boat 15, respectively, are disposed along the periphery of the rotary head cylinder 19, as shown in FIG. The supply-side loading guide 17 is configured to be higher at the loading completion position, and the winding-side loading guide 18 is configured to be lower at the loading completion position. The rotary head cylinder 19 is installed substantially perpendicular to the chassis 1, and the supply-side loading roller post 8 is pulled out of the supply-side reel 3 when the supply-side board 14 moves along the supply-side loading guide 17. Magnetic tape 13
4 is wound diagonally upward to the left as shown in FIG. 4, and the winding-side loading roller post 10 moves when the winding-side boat 15 moves along the winding-side loading guide 18. Then, the magnetic tape 13 pulled out from the take-up reel 4 is wound around the rotary head cylinder 19 obliquely downward to the right. At this time, the supply side loading roller post 8 is connected to the supply side loading guide 17.
At the loading completion position, the first and second winding-side loading roller posts 10, 11 are slightly forward due to the gradually lowering slope of the winding-side loading guide 18. The posture becomes leaning. Accordingly, as shown in FIG. 4, the magnetic tape 13 supplied to the rotary head cylinder 19 by the supply-side loading roller post 8 is
At the outlet side of the rotary head cylinder 19, the first take-up loading roller post 10 reverses the tape from the lower portion to the gentle tape path directed obliquely upward and pulls it out from the lower portion. The roller is guided obliquely upward by a gentle oblique path while maintaining a slightly inclined posture by the winding-side loading roller post 11.

20 is the chassis 1 outside the mounting position of the tape cassette 2.
The upper and lower ends are supported by bearings 21, and are mounted on the chassis 1 so as to be inclined substantially equal to the inclination of the winding-side loading posts 10, 11 at the loading completed position. ing. And
The inclined capstan 20 comes into full contact with the magnetic tape 13 in the forward inclined position, which is guided obliquely upward from the winding-side loading roller post 11 by an oblique path, and when the loading operation is completed, the notch of the tape cassette 2 is cut. The magnetic tape 13 is pressed against the pinch roller 12 moving from the position 7 and is driven by the pinch roller 12. At this time, the pitch roller 12 is configured so as to have the same inclination as the capstan 20 so as to press the entire surface against the capstan 20. twenty two
An audio control head provided at a position near the capstan 20 between the second take-up loading roller post 11 at the loading completed position and the capstan 20, and a cap from the second take-up loading roller post 11. In order to improve the contact with the magnetic tape 13 in the forwardly inclined posture, which is guided obliquely upward to the stan 20 by the oblique path, the chassis 1 is provided on the chassis 1 so as to have the same inclination as the capstan 20. Reference numeral 23 denotes an auxiliary roller post which moves in conjunction with the pinch roller 12, and is inserted into the notch 7 of the tape cassette 2 before loading starts.
The magnetic tape 13 run by the pinch roller 12 and 20 is guided toward the fixed inclined post 24. The magnetic tape 13 sent from the second take-up loading roller post 11 through the capstan 20 and the auxiliary roller post 23 in a forward inclined position is fixed to the chassis 1 in front of the tape cassette 2 and is inclined and fixed to the chassis 1. The tape twist at the time of changing from the oblique path to the horizontal traveling path is corrected by 24, and the tape is wound on the winding reel 4 of the tape cassette 2. Reference numeral 25 denotes a capstan motor for driving the capstan 20. The capstan motor 25 is attached to the chassis 1 at an angle. Since the capstan 20 is provided outside the mounting position of the tape cassette 2, the chassis 1 It can be easily realized without increasing the thickness.

Next, a loading post driving device according to an embodiment of the present invention will be described. In FIG. 1, the driving force of the loading motor 30 is the double gears 31a and 31b and the double gears 32a and 32
b, transmitted to the cam gear 34 via the double gears 33a, 33b. The cam gear 34, as shown in the sectional view of FIG.
A full-circular gear portion 35 in which the driving force of the loading motor 30 is transmitted by a gear 33b formed in the lower half and meshing with the lower half.
And an intermittent gear 36 formed with a partially missing tooth portion in the upper half and used for transmitting driving force to the loading roller posts 10 and 11, and a capstan formed on the upper surface of the pinch roller 12 The cam gear 37 is used to control the pressure contact / separation of the cam gear 20, and the cam gear 34 is formed integrally therewith, so that the thickness thereof can be reduced.

First, a mechanism in which the loading roller posts 8, 10, and 11 are driven by the intermittent gear portion 36 of the cam gear 34 is described in ninth embodiment.
A description will be given with reference to the plan view of the gear group shown in FIG. Reference numeral 38 denotes a supply-side ring gear for driving the supply-side loading roller post 8, and reference numeral 39 denotes a winding-side ring gear for driving the winding-side loading roller posts 10, 11, which is located below the rotary head cylinder 19. The center positions are provided at positions eccentric to each other. The tooth portion 40 formed in a predetermined range on the outer periphery of the winding ring gear 39 meshes with the intermittent gear portion 36 of the cam gear 34, and when viewed in the middle portion of the gear 40 and the arrow (a) in the rotation direction during loading. At the rear end, there are provided first and second toothless portions 40a and 40b which can be disengaged from the tooth ends 36a and 36b of the intermittent gear 36. Also, supply side ring gear 3
The tooth portion 41 formed in a predetermined range on the outer circumference of the gear 8 has an intermediate gear 42 meshing with the tooth portion 41, one gear 43a of a pendulum gear 43 composed of a double gear meshing with the intermediate gear 42, and a pendulum gear 43
And is linked to the supply side ring gear 40 via the other gear 43b. The intermediate gear 42 and the pendulum gear 43 are oscillating plates that are swingably mounted on a shaft 44 provided on the chassis 1.
The swinging range of the swinging plate 45 is regulated by fitting a long hole 46 formed at the other end thereof to a shaft 47 stood on the chassis 1. The shaft 47 has a tetra arm
The two arms 48a and 48b that constitute 48 are pivotally supported, and the arm 4
One end of each of 8a and 48b is arranged so as to sandwich the pendulum gear 43, and a compression spring 49 is interposed between the other ends. One end of each of the arms 48a and 48b is always connected to the pendulum gear. It is biased on the 43 side. Further, on the inside facing each other on one end side of the arms 48a, 48b, mountain-shaped convex portions 50a, 50b having slope portions on both sides are formed, and the arms 48a, 48b face the pendulum gear 43 in directions opposite to each other by 180 °. By pressing the end cam portions 51a and 51b provided so as to protrude with the slope portions thereof, the rotation of the pendulum gear 43 in any direction can be forced.

The supply-side ring gear 38 has a fixed arm 52 extending at a front end thereof as viewed in the direction of the arrow (b) of the rotation direction at the time of loading of the tooth portion 41, and a supply-side drive shaft 53 standing upright at the tip thereof. The take-up side ring gear 39 has a fixed arm 54 extending at the front end when viewed in the direction of the arrow (a) in the rotation direction during the loading of the tooth portion 40, and a take-up drive shaft 55 at the end. ing. As can be seen from FIG. 5, the supply-side boat 14 is mounted on the supply-side drive shaft 53 so as to be able to move up and down. The supply-side boat 14 has front and rear ends that engage with the outer periphery of the supply-side loading guide 17. Holding part 56, rear end holding part 57
The front end holding portion 56 is formed in a U-shaped cross section and is guided by the loading guide 17 on the supply side and is detachable. The rear end holding portion 57 is formed in a U-shaped cross section and has, for example, a front end. Claw 5 that fits into groove 17a along the outer circumference of guide 17
7a is provided and guided along the supply-side loading guide 17. In addition, FIG.
As shown in FIG. 6, a take-up boat 15 is attached to the take-up boat 15 so as to be able to move up and down. It has an end holding portion 59, the front end holding portion 58 is formed in a U shape, is guided by the winding side loading guide 18 and is detachable, and the rear end holding portion 59 is formed in a U shape in cross section. It is guided by the winding side loading guide 18. When the supply side ring gear 38 and the take-up side ring gear 39 rotate in the (b) and (b) directions during loading, respectively, the supply-side drive shaft 53 and the take-up-side drive shaft 55 It is designed to move along the outer circumference of the supply side loading guide 17 and the winding side loading guide 18,
As a result, the front end holding portion 56 of the supply side boat 14 and the front end and rear end holding portions 58, 59 of the winding side boat 15 move during the loading so that the movement locus of the drive shafts 53, 55 and the shapes of the loading guides 17, 18 are formed. From the above, without being separated from the outer periphery of the supply-side loading guide 17 and the winding-side loading guide 18, respectively, it is stably guided, and the supply-side boat 14 is gradually raised so as to be higher as the loading completion position, The take-up boat 15 moves while being gradually lowered so as to become lower toward the loading completion position. The rear end holding portion 59 of the take-up boat does not separate from the outer periphery of the take-up loading guide 18 even before the start of loading, as shown by the two-dot chain line in FIG. .

Next, a mechanism in which the pinch roller 12 is pressed against the capstan 20 by the cam portion 37 of the cam gear 34 will be described with reference to an exploded perspective view of FIG. 1 and 2, the cam portion 37 of the cam gear 3 is bent toward the center for pressing the pinch roller 12 toward the capstan 20 after the loading of the circumferential cam groove 37a is completed. Folded cam groove 37
b. Reference numeral 60 denotes a lever that operates in conjunction with the cam portion 37 of the cam gear 34, and has an elongated hole 61 formed at one end in the lever length direction and cam grooves 37a, 37 formed in the cam portion 37.
b) has a cam follower 62 which engages with the cam gear 3
4 is fitted to the shaft 63. The other end of lever 60 is chassis 1
A pin at one end of a plate 65 pivoted on a shaft 64
The other end of the plate 65 is provided with a lever 68 pivoted at the middle via a pin 67.
A spring 69 is interposed between one end of the lever 68 and one end of the lever 68. A pin 70 provided at the other end of the lever 68 is fitted into a long hole 73 of one end of a bell crank 72 rotatably provided on the chassis 1 via the pin 71, and the pinch roller 12 is
The other end of 72 is provided with the same inclination as the capstan 20. In FIG. 8, reference numeral 74 denotes an arm pivotally supported by a shaft 75 erected on the chassis 1. A bearing 76 is provided at an end and a bearing 77 is provided at an intermediate portion. Auxiliary roller post 23 with the same inclination as 20
A pin 79 implanted at the rear end of the arm 78 having a pin is pivotally mounted from below, and the bearing 77 has a groove 81 for fitting a pin 80 provided on the lower surface of the arm 78 in the middle. A pin 83 implanted at the end is pivotally attached from below, and a pin 84 provided at the tip of the arm 82 is pivotally attached from below to a hole 85 provided on the lower surface of the vector crank 72 near the pinch roller 12.

Next, a more detailed loading operation by the above mechanism will be described. 9 to 13 are explanatory diagrams showing the state of the gear group during the loading operation process. 1 and 9 show a state before the loading operation is started. At this time, the supply-side boat 14 and the take-up-side boat 15 are located at the unloading positions at the start ends of the supply-side loading guide 17 and the take-up-side loading guide 18, and as shown in FIG.
The tension post 9, the supply-side loading roller post 8, and the inclined post 16 are inserted into the notch 5 of the tape cassette 2, and the first and second winding-side loading roller posts 10, 11 are inserted into the notch 6. , And lever 60
Is pushed out in the direction of the arrow (C) by the cam follower 62, so that the plate 65, the lever 68, the bell crank
The pinch roll 12 is most retracted with respect to the capstan 20 via 72, and the arms 82, 74, 78 which operate in conjunction therewith.
As a result, the inclined roller post 23 retreats similarly to the pinch roller 12, and as shown in FIG. 3, both the pinch roller 12 and the inclined roller post 23 are inserted into the cutout 7 of the tape cassette 2. Here, the supply-side boat 14 is supported by the supply-side loading guide 17 only by the rear-end holding portion 57 according to the shape of the starting end of the supply-side loading guide 17, and the front-end holding portion is provided.
56 is detached from the guide 17. The take-up boat 15 also has a rear end holding portion 59 that engages with the take-up loading guide 18 according to the shape of the start end of the take-up loading guide 18 and a fifth end portion.
The front end holding portion 58 is separated from the winding side loading guide 18 by being supported by the receiving table 18a shown in FIG.

With the start of the loading operation, in FIG. 9, the cam gear 34 rotates clockwise, and the intermittent gear 36
36a enters the first missing tooth portion 40a of the winding side ring gear 39 and meshes with the tooth portion 40. The rotation of the intermittent gear 36 thereafter rotates the winding side ring gear 39 in the direction of the arrow (a). The supply-side ring gear 38 rotates in the direction of the arrow (b) via the pendulum gear 43 and the intermediate gear 42 interlocking therewith. Therefore, the supply side boat 14 is driven in the loading direction by the drive shaft 53 provided on the fixed arm 52 of the supply side ring gear 38.At this time, the drive shaft 53 is circularly interlocked by the supply side ring gear 38, Rear end holding part of supply boat 14
Since 57 moves linearly along the linear portion at the start end of the supply-side loading guide 17, the front-end holding portion 56 of the supply-side boat 14 gradually approaches the guide side as it moves, and the rear-end holding portion 57 is moved to the supply-side loading position. At the point of transition to the arc portion of the guide 17, as shown in FIG. 14, the front end holding portion 56 is engaged with the outer periphery of the supply side loading guide 17, and the subsequent movement of the supply side boat 14 is performed with the drive shaft 53 and the front end. In addition, the magnetic tape 13 is pulled out by the loading roller post 8 and wound around the rotary head cylinder 19 in a stable and reliable manner. The same applies to the winding boat 15.

Next, immediately before the loading operation in which the supply-side and take-up-side boats 14, 15 abut against the stoppers 86, 87 in FIG. 5, the intermittent gear 36 of the cam gear 34 has a tooth end as shown in FIG. The portion 36b is the second missing tooth portion 40b of the take-up side ring gear 39.
By disengaging from the tooth part 40, the tooth part 40 is not engaged. At this time, the end cams 51a, 51a fixed to the pendulum gear 43
The phase of b is such that when the tetra arm 48 is urged by the spring 49, it engages with the slopes of the mountain-shaped projections 50a and 50b formed on the arms 48a and 48b, and the pendulum gear 43 performs the loading operation. It is designed to be in a position where it is forced to rotate in the same clockwise direction as. Therefore, as shown in FIG. 11, when the intermittent gear 36 is disengaged from the tooth portion 40 of the winding ring gear 39, the tetra arm 48 biased by the spring 49 further rotates the pendulum gear 43 clockwise. So that the supply side ring gear 38 and the take-up side ring gear 39
The supply-side boat 14 and the take-up-side boat 15 are pressed by stoppers 86 and 87, respectively, and are fixed in position to complete the loading operation. At this time, even if the timing of pressing the stoppers 86 and 87 of the supply boat 14 and the take-up boat 15 is shifted from each other, the pendulum
Adjustment is achieved by swinging in any direction around 44.

When the cam gear 34 further rotates clockwise after the completion of the loading operation, the cam follower 62 provided on the lever 60 enters the bent cam groove 37b of the cam portion 37 as shown in FIGS. Pull the lever 60 in the direction of arrow (d), rotate the plate 65 clockwise to push out the lever 68, and apply the force of the spring 69 to the bell crank with the pin 70.
72 is rotated counterclockwise to press the pinch roller 12 against the capstan 20. At the same time, press the arm 82 and press the arm 74
Is rotated clockwise to draw the auxiliary roller post 23 between the capstan 20 and the inclined post 24 via the arm 78 pivotally supported by the bearing 76 of the arm 74. At this time, the auxiliary roller post 23 completes the stable movement between the capstan 20 and the fixed inclined post 24 by the pin 80 formed on the arm 78 being guided by the groove 81 formed on the arm 82. Then, a gentle oblique path of the magnetic tape 13 from the winding-side loading roller post 11 to the capstan 20 is maintained.

Next, in the unloading operation, in FIG. 12, the cam gear 34 rotates counterclockwise to release the pressing operation of the pinch roller 12, and when the cam gear 34 rotates to the position in FIG. Is the tooth end 36b of the winding side ring gear 3.
9 meshes with the tooth portion 40 by entering the second missing tooth portion 40b,
The take-up side ring gear 39 is rotated in the direction of the arrow (e) of the rotation direction during unloading, and the pendulum gear 43, the intermediate gear
The supply side ring gear 38 is rotated via the arrow 42 in the direction indicated by the arrow (f) in the rotation direction during unloading. The supply-side loading roller post 8 and the take-up-side loading roller posts 10 and 11 are respectively provided with the notches 5 and 6 of the tape cassette 2.
9, the intermittent gear 36 of the cam gear 34
The tooth end 36a is the first toothless part 4 of the supply side ring gear 39.
At 0a, detachment from the tooth portion 40 is possible. At this time, the phase of the end cam portions 51a and 51b fixed to the pendulum gear 43 is such that when the tetra arm 48 is urged by the spring 49,
The slopes of the mountain-shaped projections 50a, 50b formed on the arms 48a, 48b are designed so that the same counterclockwise rotation as in the unloading operation is forced. When the cam gear 34 further rotates counterclockwise, the intermittent gear 36 separates from the tooth portion 40 of the winding-side ring gear 39,
As shown in the figure, the pendulum gear 43 is further forced to rotate counterclockwise through the tetra arm 48 by the spring 49, and the supply side ring gear 38 and the winding side ring gear 39 are further moved in the arrow (F) direction. And rotate in the direction of (e) and supply boat
The take-up boat 15 and the take-up boat 15 are pressed by the start ends of the supply-side loading guide 17 and the take-up loading guide 18, and are fixed at the unload position. In this state, the tape cassette 2 is ejected. Thereafter, the cam gear 34 rotates clockwise, stops at the position shown in FIG. 9, and returns to the initial state.

Thus, the supply side ring gear 38 and the winding side ring gear 39
By eccentrically arranging the center positions of the ring gears, it is easier to hold the ring gears than in the conventional structure in which ring gears of substantially the same shape are arranged substantially concentrically, and the supply side ring gear 38 The supply-side drive shaft 53 and the take-up side drive shaft 55 fixed to the take-up side ring gear 39 and the supply-side boat 14 guided along the supply-side loading guide 17 and the take-up loading guide 18 and the winding. It can easily be made to match the movement locus of the take-off boat 15,
This eliminates the need for a conventional relay link. Therefore, the number of parts can be reduced accordingly, the assemblability can be improved, and the magnetic recording / reproducing apparatus can be reduced in size, weight, and thickness.

As described above, according to the present invention, the conventionally required relay link can be eliminated, so that the number of parts can be reduced, assemblability can be improved, and the magnetic recording / reproducing apparatus can be reduced in size, weight, and thickness. Can also be achieved.

[Brief description of the drawings]

1 and 2 are plan views before and after tape loading of a loading post drive unit in a magnetic recording and reproducing apparatus according to an embodiment of the present invention.
FIG. 4 and FIG. 4 are schematic plan views illustrating a tape path by the loading drive device and perspective views showing essential parts of the tape path. FIGS. 5 and 6 are perspective views showing essential parts of the loading post drive device. , FIG. 7 is a sectional view of the cam gear, FIG. 8 is an exploded perspective view for explaining a part of the pinch roller pressing mechanism, and FIGS. 9 to 13 are views showing the state of the boat driving gear group in the loading operation process. FIG. 14 is an explanatory view showing that the boat before loading is stably engaged with the loading guide during operation, and FIG. 15 is a schematic plan view of a conventional loading post drive device. 8: Supply side loading roller post, 10: First winding side loading roller post, 11: Second winding side loading roller post, 12: Pinch roller, 13 ...
... Magnetic tape, 14 ... Supply-side boat, 15 ... Rewind-side boat, 17 ... Supply-side loading guide, 18 ... Rewinding-side loading guide, 19 ... Rotating head cylinder, 20 ...
… Capstan, 23… Auxiliary roller post, 34… Cam gear, 35… Full circumference gear part, 36… Intermittent gear part, 37… Cam part, 38 …… Supply side ring gear, 39 …… Intake ring gear, 52 ... Fixed arm, 53 ... Supply drive shaft, 54
…… Fixed arm, 55… Rewind drive shaft.

Claims (1)

(57) [Claims] 1. A supply-side loading ring for driving a supply-side loading post and a winding-side loading ring for driving a take-up-side loading post are disposed with their center positions eccentric. The supply side boat movable along the supply side loading guide and the winding side boat movable along the winding side loading guide having the winding side loading post are respectively engaged with and directly engaged with the winding side boat. Drive shafts for driving are fixedly provided on the supply-side loading ring and the winding-side loading ring, respectively, and the movement locus of the boat moving along each loading guide and the rotation locus of the drive shaft of each loading ring are determined. Matched loading post drive.