JPH0785548A - Tape loading mechanism - Google Patents

Abstract

PURPOSE:To prevent a tape from flawing when the tape is loaded into or unloaded from a cylinder. CONSTITUTION:Upper and lower flanges are provided on a 1st tape drawing post 32 for guiding the tape 4 between a cassette 1 and the cylinder 6. Moreover, these flanges are formed with notches over about half their circumferences. Consequently, even when a tape traveling course is oscillated up and down at the loading or unloading time, an allowable sliding range of the tape 4 on the 1st tape drawing post 32 is widened, and the tape 4 is not caught. Then, at the time of recording and reproducing, the tape 4 is held by the 1st tape drawing post 32 and a 2nd tape drawing post 20 in their B positions, so that the traveling position is regulated in the vertical direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tape loading mechanism in a magnetic recording / reproducing apparatus such as a cassette type video tape recorder (VTR).

[0002]

2. Description of the Related Art A tape loading mechanism provided in a conventional VTR will be described with reference to FIGS. FIG. 9 shows a VT including a conventional tape loading mechanism.
It is a top view which shows the structure of R. In this figure, cassette 1
Has a supply reel 2 and a take-up reel 3, and winds a signal recording / reproducing tape 4 and stores it in a storage position.

On the other hand, the tape 4 is attached to the chassis 5 of the VTR.
A cylinder 6 for helically winding is provided, and a supply reel base 7 and a take-up reel base 8 are provided at the seated position of the cassette 1. Stopper pins 9 and 10 are erected on the chassis 5 on the left and right rear sides of the cylinder 6. The stopper pin 9 is attached to the end of the left guide groove described later, and the stopper pin 10 is attached to the end of the right guide groove.

FIG. 10 is a perspective view showing the structure of a first tape pull-out means including the first slide base 11. The slide base 11 is mounted on the cylinder 6 along the upper surface of the chassis 5.
Is a flat plate-shaped member that moves on the left side of the
Book guide pins 13 and 14 are attached downward. Similarly to the first tape pull-out means, the second tape pull-out means shown in FIG. 9 has two guide pins 15 and 16 attached to the lower surface of the second slide base 12. V-shaped cutouts 17 and 18 are formed on one side surface of the slide bases 11 and 12, respectively. The recess 17 contacts the stopper pin 9 while the tape 4 is loaded in the cylinder 6, and the recess 18 contacts the stopper pin 10.

As shown in FIG. 9, the slide bases 11, 1
Tape pull-out posts 19 and 20 are attached to the upper surface of 2, respectively. The first tape pull-out post 19 pulls out the tape 4 from the supply reel 2 in the cassette 1 at the time of loading, guides the tape 4 toward the cylinder 6, and winds the tape 4 around the tape sliding surface of the cylinder 6. Guide to the playback position. As shown in FIG. 10, the tape pull-out post 19 includes an upper flange 22 press-fitted on an upper portion of a post shaft 21 provided upright on the slide base 11, a roller 23 fitted in a central portion of the post shaft 21, and a post shaft 21. 21 and a lower flange 24 that is press-fitted in the lower part of the unit 21.

The spacing between the upper flange 22 and the lower flange 24 of the tape pull-out post 19 is set to be slightly larger than the width of the tape 4 so that the tape 4 does not come off the tape pull-out post 19 during loading or unloading. It is for regulation. Also, the upper flange 22
Is in contact with the upper end of the tape 4 at the position B shown by the chain double-dashed line, and plays a role of controlling the tape 4 to run stably at a constant height.

Further, a first inclined post 25 and a second inclined post 26 are attached to the upper surfaces of the first slide base 11 and the second slide base 12, respectively. As shown in FIG. 10, the inclined post 25 is inclined with respect to the tape pull-out post 19 and guides the tape sliding surface of the cylinder 6 so that the recording surface of the tape 4 is parallel. The tip end of the inclined post 25 is inclined in the direction in which it approaches the tape pull-out post 19, whereas the inclined post 26 is inclined in the direction in which its tip is separated from the tape pull-out post 20.

Next, on the chassis 5 around the cylinder 6,
The guide grooves 27 and 28 are cut out. Guide groove 27
Is a groove for moving the slide base 11 when the tape 4 is loaded or unloaded, engages with the guide pins 13 and 14, and conveys the first tape pull-out means by a drive device (not shown). The guide groove 28 is also a groove for moving the second tape pull-out means including the slide base 12 when loading or unloading the tape 4, and engages with the guide pins 15 and 16. When the cassette 1 is not attached to the VTR, the slide base 1
1, 12 are in the position A shown by the solid line in FIG.
Is in the B position when the tape 4 is loaded.
In this way, the first and second tape pull-out means reciprocate between the A position inside the cassette 1 and the B position where the tape 4 is wound around the cylinder 6. In this way, the guide groove 2
7, 28 and the stopper pins 9, 10 constitute first and second driving means for driving the tape pull-out means to the A position and the B position, including a driving source (not shown).

The operation of the conventional tape loading mechanism constructed as described above will be described. First, the operation at the time of loading when the slide bases 11 and 12 move from the A position to the B position will be described. In FIG. 9, when loading the cassette 1 at a predetermined position, the guide pins 14 and 16 are driven by driving means such as a loading motor (not shown), and the slide bases 11 and 12 move along the guide grooves 27 and 28, respectively. . At this time, a weak brake is applied to the supply reel base 7 and a strong brake is applied to the take-up reel base 8 by a braking means (not shown).

In this way, the brake is applied to both the supply side and the take-up side reel bases because the tape pull-out posts 19 and 2 are provided.
0 pulls tape 4 out of cassette 1
This is to prevent it from being pulled out and loosening.
Also, changing the braking strength between the supply side and the winding side is
This is so that the tape 4 can be pulled out only from the supply reel 2.

With the movement of the slide bases 11 and 12,
The tape pull-out posts 19 and 20 pull out the tape 4 only from the supply reel 2 of the cassette 1 and wind it around the cylinder 6. Recesses 17 provided in the slide bases 11 and 12,
When 18 is engaged with the stopper pins 9 and 10, respectively, the movement of the slide bases 11 and 12 along the guide grooves 27 and 28 is stopped. Further, the guide pins 14 and 16 have the guide groove 2
By contacting the inner circumference of 7, 28, the slide base 11,
12 is positioned, and loading of the tape 4 is completed. Next, the brake mechanism is set to a non-operating state on both the supply side and the winding side, and a signal is recorded or reproduced on the tape 4 wound around the cylinder 6.

Next, at the time of unloading when the slide bases 11 and 12 move from the B position to the A position, the slide bases 11 and 12 are driven in the direction opposite to that at the time of loading and move along the guide grooves 27 and 28. . Although the tape 4 loosens as the slide bases 11 and 12 move toward the cassette 1, the tape 4 is wound around the supply reel 2 by a winding means (not shown).

[0013]

However, in such a conventional structure, although a stable running path is formed with respect to the tape 4 at the B position where loading is completed, the tape moves between the A position and the B position. When loading or unloading, the road becomes unreasonable. That is, tape 4
When the tape is run, the tape 4 is wound around the cylinder 6 at the position B, so that the tape 4 travels without being twisted out from one reel. When entering the other reel, the vehicle runs without any height deviation or inclination from the horizontal direction. On the other hand, at a position midway between the A position and the B position, the tape 4 is not sufficiently wound around the cylinder 6, so that the tape 4 may be twisted or the position may change as the tape runs.

This is a cylinder 6 and a tape pull-out post 1.
9, 20 and the inclined posts 25 and 26, it is possible to form a stable running path at the B position.
This is because if 0 and the inclined posts 25 and 26 are moved, the positional relationship that forms a stable traveling path is lost. Therefore, at the time of loading the tape 4 traveling from left to right in FIG. 9, the tip ends of the inclined posts 25 and 26 are tilted to the left side, so that the tape 4 originally travels while passing through these posts. It falls below the height. For this reason, there is a fear that the tape 4 may enter the tape pull-out post 20 that should be incident horizontally from below.

Further, when the tape 4 travels from the right to the left during unloading, the approaching directions with respect to the inclined posts 26, 25 are reversed, so that the tape 4 is passed between the inclined posts 26, the cylinder 6 and the inclined posts 25. Is higher than it should be. For this reason, there is a fear that the tape 4 may enter the tape pull-out post 19 which should enter horizontally from above.

For this reason, the tape 4 tends to move downward under the tape pull-out post 20 during loading and under the tape pull-up post 19 under unloading. Tape drawer post 1
9 and 20 have flanges as shown in FIG. 10, and the distance between them is slightly larger than the width of the tape 4. Therefore, the vertical movement allowance of the tape 4 is small, and the movement of the tape 4 is immediately stopped. Especially when unloading
Since the tape 4 is wound while a large tension is applied, the end of the tape 4 which is prevented from moving upward is strongly pressed against the upper flange 22 and buckles at this portion.
There is a problem that the tape may be bent due to bending and entering the gap between the upper flange 22 and the roller 23.

The present invention has been made in view of such conventional problems, and increases the vertical movement allowance of the tape at the time of loading or unloading to prevent the tape from being damaged by the tape pulling post. The purpose is to do.

[0018]

The invention of claim 1 of the present application is a tape loading mechanism for guiding a tape between a storage position where the tape is stored in a cassette and a recording / reproducing position where the tape is wound around a cylinder. There is a first slide base that slides reciprocally between the storage and recording / reproducing positions of the tape, and the first slide base is erected vertically.
First tape pull-out post having an upper flange and a lower flange, which are notched on at least one side surface that abuts on the tape when the slide base is reciprocating, and a first tape pull-out to the first slide base. A first tape pull-out means that is provided upright in the vicinity of the post and has a first inclined post that is inclined substantially parallel to the tape sliding surface of the cylinder and that guides the tape wound around the supply reel of the cassette; A second slide base that slides reciprocally between the storage and recording / reproducing positions of the tape, and a second tape drawer that is erected vertically on the second slide base and that has an upper flange and a lower flange and a roller. A post, a second slide base, and a second inclined post that is erected upright in the vicinity of the second tape pull-out post and is inclined substantially parallel to the tape sliding surface of the cylinder. On the other hand, a second tape pull-out means provided on the opposite side of the first tape pull-out means for guiding the tape wound around the take-up reel of the cassette, and a first tape pull-out means for storing and recording / reproducing the tape. First driving means for guiding the second tape pulling means to the tape storing and recording / reproducing positions, respectively.
It is characterized by including.

The invention of claim 3 of the present application is a tape loading mechanism for guiding the tape between a storage position where the tape is stored in the cassette and a recording / reproducing position where the tape is wound around the cylinder. And a first slide base that reciprocally slides between recording and reproducing positions, and at least one side surface that is vertically provided on the first slide base and that abuts the tape when the first slide base is in the course of reciprocation. A first tape pull-out post having an upper flange and a lower flange, which are notched, and a roller, a first elastic support means for giving a biasing force for rotating the first tape pull-out post in one direction, and a first slide. It has a first inclined post that is erected close to the first tape pull-out post on the base and is inclined substantially parallel to the tape sliding surface of the cylinder, and is wound around the supply reel of the cassette. A first tape pull-out means for guiding the tape, a second slide base slidably and reciprocally between the storage and recording / reproducing positions of the tape, and an upright flange vertically installed on the second slide base. A second tape pull-out post having a lower flange and a roller, a second slant that is erected on a second slide base in the vicinity of the second tape pull-out post, and is inclined substantially parallel to the tape sliding surface of the cylinder. A second tape pull-out means having a post and provided on the opposite side of the cylinder from the first tape pull-out means for guiding the tape wound around the take-up reel of the cassette; and a first tape pull-out means. The first drive means for guiding the tape to the tape storage and recording / reproducing position, the second drive means for guiding the second tape pulling means to the tape storage and the recording / reproducing position, and the first tape pulling means, respectively. Te When it came to the recording and reproducing position, and a flange rotation means for rotating the upper flange and the lower flange to the first slide base, that includes the city and features.

According to a fifth aspect of the present invention, there is provided a tape loading mechanism for guiding the tape between a storage position where the tape is stored in the cassette and a recording / reproducing position where the tape is wound around the cylinder. And a first tape base that slides reciprocally between recording and reproducing positions, and a first tape drawer that is erected upright on the first slide base so as to be vertically movable and that has an upper flange and a lower flange and a roller. A post, a second elastic support means for elastically supporting the first tape pull-out post in the vertical direction, and a tape slide surface of the cylinder, which is erected on the first slide base in the vicinity of the first tape pull-up post. And a first tape pull-out means for guiding the tape wound around the supply reel of the cassette and a reciprocating position between the tape storing and recording / reproducing position. A second slide base that slides in place, a second tape pull-out post that is vertically installed on the second slide base, and has an upper flange and a lower flange, and a roller, and a second tape on the second slide base. It has a second inclined post that is erected close to the pull-out post and that is inclined substantially parallel to the tape sliding surface of the cylinder, and is provided on the opposite side of the cylinder from the first tape pull-out means to wind the cassette. Second tape pull-out means for guiding the tape wound around the take-up reel, first drive means for guiding the first tape-drawing means to the tape storing and recording / reproducing positions, and second tape-drawing means. Drive means for guiding the tape to the storage and recording / reproducing positions of the tape, and the first tape pulling-out means abuts at least one of the upper flange and the lower flange when the recording / reproducing position of the tape is reached. It is characterized in that it comprises a post height positioning means for holding the tape pulling posts at a predetermined height with respect to the slide base, a.

[0021]

According to the inventions of claims 1 and 2 having such characteristics, when loading or unloading the tape to the cylinder, the first and second tape pulling-out means guide the tape while holding it. At this time, the running path of the tape becomes unstable, but since the notch is provided in the flange of the first tape pull-out post, the vertical movement allowance of the tape becomes large. Therefore, the ends of the tape are not caught on the first and second tape pulling posts. When the tape is wound around the cylinder, the running position of the tape is surely restricted by the upper and lower flanges of the first and second tape pulling posts.

According to the third and fourth aspects of the present invention, when loading or unloading the tape in the cylinder, the first and second tape pulling-out means guide the tape while holding it. At this time, the running path of the tape becomes unstable, but since the notch is provided in the flange of the first tape pull-out post, the end portion of the tape is not caught by the first and second tape pull-out posts. When the first and second tape pulling-out means come to the recording / reproducing position of the tape, the flange rotating means controls the position so that the notch part escapes from the tape winding range. Therefore, when loading or unloading, the vertical movement allowance of the tape becomes large, and when the tape is wound around the cylinder, the running position of the tape is reliably regulated by the upper and lower flanges of the first and second tape pulling posts. To be done.

Further, according to the inventions of claims 5 and 6 of the present application,
When the tape is loaded into or unloaded from the cylinder, the first and second tape pull-out means guide the tape while holding it. At this time, the running path of the tape becomes unstable, but the second elastic support means supports the first tape pull-out post so as to be vertically movable. Therefore, the ends of the tape are not caught on the first and second tape pulling posts. Therefore, even if the tape tries to move in the vertical direction during loading or unloading, the first tape pull-out post can move together with the tape, and the amount of relative movement of the tape in the vertical direction with respect to the flange decreases. Therefore, the incident angle of the tape with respect to the first and second tape pulling posts is reduced. Further, when the tape is wound around the cylinder, the running position of the tape is surely regulated by the upper and lower flanges of the first and second tape pulling posts.

[0024]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A tape loading mechanism according to a first embodiment of the present invention will be described with reference to FIGS.
The same parts as those in the conventional example are designated by the same reference numerals, and the description thereof will be omitted. FIG. 1 is a plan view of a VTR including a tape loading mechanism in the first embodiment. As shown in the figure, a first tape pull-out means different from the conventional example is provided movably on the supply reel base 7 side. FIG. 2 is a perspective view showing the structure of the first tape pull-out means.

In FIG. 2, a first tape pull-out post 32 is provided upright on a plate-shaped first slide base 31. The tape pull-out post 32 pulls out the tape 4 stored in the supply reel 2 at the time of loading, guides the tape 4 toward the cylinder 6, and mounts the tape 4 on the tape sliding surface of the cylinder 6. On the upper flange 33 of the tape pull-out post 32, a cutout portion 34 is formed by cutting out a portion close to the roller 23 over about a half circumference on the concave portion 17 side. The remaining half circumference of the upper bulge 33 is the tape height restricting portion 35.

Further, a cutout portion 37 is formed in the lower flange 36 at a position similar to that of the upper flange 33 by cutting out about a half circumference on the roller 23 side. The remaining half of the circumference is the tape height restricting portion 38. The notches 34 and 37 are smooth conical curved surfaces whose diameter increases with distance from the roller 23. Further, the cutout portion 34 and the tape height regulating portion 35, and the cutout portion 37 and the tape height regulating portion 38 are also connected by smooth curved surfaces. The second tape pull-out means located on the winding side is the same as that of the conventional example.

On the left side of the cylinder 6, there is a guide groove 28 on the right side.
A guide groove 39 is provided so as to be substantially symmetrical with.
The width of the guide groove 39 is wide near the position B in FIG. At the end of the guide groove 39 close to the cylinder 6,
The rotation stop pin 40 is erected on the chassis 5. The rotation stop pin 40 is a pin that restricts the rotational position of the slide base 31 after the slide base 31 reaches the position B and the recess 17 engages with the stopper pin 9.

A leaf spring 41 is attached to the right side of the stopper pin 9. The leaf spring 41 is a spring whose one end is fixed to the chassis 5 and whose other end is supported so as to be flexible in the tangential direction of the cylinder 6. By contacting the guide pin 14 of FIG. 2, the leaf spring 41 functions to urge the slide base 31 in the B position in the clockwise direction with the stopper pin 9 as the rotation axis. It is also assumed that when the slide base 31 reaches the B position, a rotation member (not shown) is attached to urge the guide pin 14 counterclockwise against the spring force of the leaf spring 41. Here, the drive source of the slide base 31,
The stopper pin 9, the guide groove 39, the detent pin 40, the leaf spring 41, and the rotating member guide the first tape pull-out means to the tape storing and recording / reproducing positions, respectively, and rotate the slide base 31. Drive means of.

In addition to the mechanical parts shown in the drawing, a tape guide post, a capstan, a pinch roller, etc. are attached to the actual VTR. However, the illustration is omitted here because it has little relation to the object of the present invention. This omission is the same in the second and third embodiments described later. Further, the drive source of the slide base 12, the stopper 10, and the guide groove 28 constitute second drive means for guiding the second tape pull-out means to the tape storage and recording / reproducing positions, respectively.

The operation of the tape loading mechanism constructed as above will be described. When the cassette 1 is mounted at a predetermined position, the guide pins 14 and 16 are driven by a driving unit having a loading motor (not shown) as a drive source, and the left and right slide bases 31 and 12 are respectively provided with the guide grooves 3.
Move along 9,28. Slide base 31,12
At the time of loading from the position A to the position B, the tape pull-out posts 32 and 20 pull out the tape 4 only from the supply reel 2 of the cassette 1 and wind it around the cylinder 6.
At this time, the tape pull-out post 32 becomes B
Since it is located on the position side, the tape 4 does not wind around the inclined post 25.

At the time of loading, the tape 4 runs from left to right in FIG. 1, but it becomes an unreasonable running path.
While passing through the cylinder 6 and the inclined post 26, the tape 4 rises above the original running height. In this case, the inclination of the tape 4 with respect to the axis of the tape pull-out post is determined by the positional relationship between the cylinder 6, the tilt post 26, and the tape pull-out posts 32 and 20, and unlike the conventional example, the tape 4 is not wound around the tilt post 25. , Tape 4 is tape pull-out post 2
It will enter 0 from above.

Therefore, the end portion of the tape 4 is pressed against the upper flange of the tape pull-out post 20. At this time, whether or not the tape is damaged depends on the magnitude of the tension applied to the tape 4. The tension applied to the tape 4 during loading is the braking torque of the supply reel base 7 divided by the tape winding radius of the supply reel 2, and can be made sufficiently small by weakening the brake applied to the supply reel base 7. For this reason, at the time of loading, damage is unlikely to occur even if the tape 4 becomes an unreasonable running path.

Next, the state of the tape 4 when the slide bases 31 and 12 are stopped will be described. Figure 3 is the first
FIG. 6 is an explanatory view showing a rotating state of the slide base 31 when the tape pulling-out means in FIG. As shown in FIG. 1, the slide base 31 becomes rotatable after the recess 17 is engaged with the stopper pin 9. By bringing the guide pin 14 into contact with the leaf spring 41 from the state shown in FIG.
While bending the leaf spring 41 as shown in FIG. 3B, the slide base 31 rotates counterclockwise as shown in FIG. 3C. This is because the slide base 31 can be easily rotated at the position B by forming an angle between the direction in which the guide pin 14 and the stopper pin 9 are connected and the direction in which the guide pin 14 is biased by the rotating member. You can Then, the outer peripheral portion of the slide base 31 comes into contact with the rotation stopping pin 40 to stop the rotation.

As the slide base 31 rotates in such a direction as to approach the cylinder 6 of FIG. 1, the inclined post 2 on which the tape 4 was not wound at the time of loading.
Tape 4 will be wrapped around 5. On the other hand, like the conventional example, the slide base 12 on the right side has the guide pin 16 and the guide groove 28 after the recess 18 is engaged with the stopper pin 10.
It is positioned by contacting the inner circumference of the.

As described above, by rotating the slide base 31 immediately before the end of loading, the tape 4 is placed in a wide range between the notches 34 and 37 of the tape pull-out post 32.
Even when the tape 4 is positioned at the time of loading, the tape 4 can be reliably positioned between the tape height restricting portions 35 and 38 at the end of the loading. Therefore, the tape 4 is held at a predetermined height, and recording / reproduction becomes possible.

Next, the operation at the time of unloading the slide bases 31 and 12 moving from the B position to the A position will be described. Slide base 3 when unloading
1, 12 are driven in the opposite direction to the loading. The slide base 31 rotates clockwise around the stopper pin 9 as a rotation axis by the elasticity of the leaf spring 41, and then the guide groove 3
Move along the line 9 toward the position A. At the time of unloading, the tape 4 runs from the right side to the left side in FIG. 1, but it becomes an unreasonable running path. That is, since the tip end of the inclined post 26 is tilted to the cylinder 6 side, the tape 4 is lowered from its original running height while passing through the inclined post 26 and the cylinder 6, and enters the tape pull-out post 32 which should be horizontal from below. Will end up. Then, the tape 4 tries to move below the tape pull-out post 32.

As described above, in order to prevent the tape 4 from taking an unreasonable running path during unloading, the supply reel base 7 is rotated while applying a strong brake to the take-up reel base 8. At this time, the tape 4 is rewound onto the supply reel 2. However, even if the tape 4 is wound further, slippage occurs in the clutch mechanism (not shown) provided on the supply reel base 7 and the tape 4 is removed. It will not be pulled by excessive force or pulled out from the take-up reel 3.
The tension applied to the tape 4 during unloading is
It is obtained by dividing the winding torque of the supply reel base 7 by the tape winding radius of the supply reel 2 and has a larger value than that at the time of loading.

In this embodiment, since the lower flange 36 of the tape pull-out post 32 is provided with the notch 37, the tape 4 can move downward, and the surface of the notch 37 has a smooth curved surface. The movement allowance of the tape 4 is also large. Therefore, even if the tape 4 moves downward, its end is not pressed against the lower flange 36, and the tape is not damaged. Since the notch 37 has a smooth curved surface with a larger diameter toward the bottom, the tape 4 cannot be moved indefinitely, and the tape 4 has a restriction force that does not get over the lower flange 36 as it moves downward. It takes. When the slide bases 31 and 12 are returned to the cassette 1 in this manner, the unloading is completed.

Next, the loading mechanism in the second embodiment of the present invention will be explained. FIG. 4 is a plan view of a VTR including a tape loading mechanism in the second embodiment.
The same parts as those in the conventional example shown in FIGS. 9 and 10 are designated by the same reference numerals, and their description will be omitted.

FIG. 5 is a perspective view of the first tape pull-out means used in the tape loading mechanism of the second embodiment.
As shown in FIG. 5, the first slide base 11 has a first
The inclined post 25 and the first tape pull-out post 52 are attached. Upper flange 53 of tape pull-out post 52
A notch 54 is formed by cutting a half of the portion of the portion contacting the roller 23 on the side of the recess 17 into a conical shape.
The remaining half of the circumference of the upper flange 53 is the tape height restricting portion 55. Further, the lower flange 56 attached to the lower portion of the tape pull-out post 52 has a cutout portion 57 and a tape height regulating portion 58 formed at the same circumferential position as the upper flange 53. Approximately a half circumference of the lower flange 56 close to the roller 23 serves as a cutout portion 57, and the remaining half circumference serves as a tape height regulating portion 58. Notch 5 as in the first embodiment
4, 57 have a smooth curved surface such that the diameter increases as the distance from the roller 23 increases, and also between the cutout portion 54 and the tape height regulation portion 55, and between the cutout portion 57 and the tape height regulation portion 58. It is tied with a smooth curved surface.

FIG. 6A is an exploded perspective view showing the structure of the first tape pull-out means. The shaft 59 shown in FIG.
The tape pull-out post 52 is rotatably held, and is supported by a cylindrical shaft holder 59a provided upright on the slide base 11 as shown in FIG. 6 (a). First
Unlike the embodiment, the tape pull-out post 52 is rotatably supported by the slide base 11. The tape pull-out post 52 is urged clockwise by a torsion spring 60 as a first elastic supporting means. Torsion spring 60
As shown in FIG. 6A, one end of the slide base 11 is
The other end is locked to the lower flange 56, and the coil portion is held by the shaft holder 59a.

As shown in FIG. 5, a wire 61 is hung on the tape pull-out post 52. One end of the wire 61 is engaged with the lower flange 56, and the other end is connected to the pulling piece 63 through the through hole of the tubular portion 62 provided in the slide base 11. As shown in FIG. 6A, the wire 61 rotates the tape pull-out post 52 counterclockwise against the biasing force of the torsion spring 60 when the pulling piece 63 moves to the right on the upper surface of the slide base 11. Work. Normally, the pulling piece 63 is in contact with the tubular portion 62, and the tape pulling-out post 52 is located at the most clockwise position in the rotatable range.

Next, as shown in FIG. 4, when the first tape pull-out means is in the B position, the locking claw 64 is engaged with the first tape pull-out means.
Is attached to the chassis 5 as a flange rotating means. As shown in the perspective view of FIG. 6B, a corner is formed on the upper piece of the locking claw 64, and when the first tape pulling-out means approaches the position B, the pulling piece 63 is engaged and the pulling piece 63 is engaged. The tube portion 62
It works to separate from. The second slide base 12 on the winding side is the same as the conventional example.

The operation of the tape loading mechanism of the second embodiment constructed as above will be described. When the cassette 1 is mounted at a predetermined position, the slide bases 11, 1
2 is driven by a loading motor as a drive source and moves along the guide grooves 27 and 28, respectively. During loading in which the slide bases 11 and 12 move from the A position to the B position, the tape pull-out posts 52 and 20 pull out the tape 4 only from the supply reel 2 of the cassette 1 and wind it around the cylinder 6.

At the time of loading, the tape 4 runs from left to right in FIG. 4, but since it becomes an unreasonable running path,
The tape pulling post 20 which should be incident horizontally enters from below. Therefore, the end portion of the tape 4 is pressed against the lower flange of the tape pull-out post 20. However, as in the first embodiment, the tension applied to the tape 4 is smaller than that at the time of unloading, so that the tape is damaged. There is nothing to do.

Next, the operation of the slide bases 11 and 12 when stopped will be described. The pulling piece 63 engages with the locking claw 64 just before the movement of the slide base 11 is completed. After that, the pulling piece 63 cannot move integrally with the slide base 11, and the wire 61 is pulled out through the tubular portion 62. Therefore, the tape pull-out post 52 rotates relative to the slide base 11 against the rotational biasing force of the torsion spring 60. Notches 5 are formed above and below the tape winding range of the tape pull-out post 52 during loading.
Even if 4, 57 are located, the tape 4 can be reliably brought into contact with the tape height restricting portions 55, 58 at the end of loading. The recesses 17 and 18 are stopper pins 9 and 1.
The guide pins 14 and 16 are engaged with the guide groove 2
By contacting the inner circumference of 7, 28, the slide base 1
Positioning of 1 and 12 is completed and loading is completed.

Next, the operation at the time of unloading the slide bases 11 and 12 moving from the B position to the A position will be described. At the beginning of moving the slide base 11,
Since the pulling piece 63 is released from the locking claw 64, the wire 61
Loosens. The action of the torsion spring 60 causes the tape pull-out post 52 to move by a rotation angle corresponding to the amount of slack.
Rotate relative to. As a result, the notches 54 and 57 are located above and below the tape winding range of the tape pull-out post 52.

At the time of unloading, the tape 4 runs from right to left in FIG. 4, but since it becomes an unreasonable running path, the tape 4 enters the tape pull-out post 52 which should enter horizontally from above. Then, the tape 4 tries to move above the tape pull-out post 52. Since the winding torque of the tape 4 is applied to the supply reel 2 during unloading,
Large tension is applied to the tape 4. Since the upper flange 53 of the tape pull-out post 52 is provided with the cutout portion 54, the tape 4 can be moved upward without being restricted in the vertical direction. Further, since the notch 54 has a smooth curved surface, the movement allowance of the tape 4 is large, and even if the tape 4 moves upward, its end is not pressed against the upper flange 53. Therefore, the tape 4 is not damaged.

Since the notch 54 provided on the upper flange 53 is a smooth curved surface having a larger diameter toward the upper side, the tape 4 cannot be moved indefinitely, and the upper flange 53 gets over as it moves upward. Regulatory power not to be strengthened. When the slide bases 11 and 12 are returned to the cassette 1 in this state, the unloading is completed.

Next, the tape loading mechanism of the third embodiment of the present invention will be explained. FIG. 7 is a plan view of a VTR including the tape loading mechanism in the second embodiment.
The same parts as those of the conventional example are designated by the same reference numerals, and the description thereof will be omitted.

FIG. 8 is a perspective view of the first tape pull-out means used in the tape loading mechanism of the third embodiment.
As shown in FIG. 8, the first slide base 11 has a first
The inclined post 25 and the first tape pull-out post 71 are attached. The tape pull-out post 71 is fitted into the shaft 21 provided upright on the slide base 11. A sleeve 72 is inserted in the shaft 21. The tape pull-out post 71 has an upper flange 22 press-fitted in the upper portion of the sleeve 72, a roller 23 fitted in the central portion of the sleeve 72, and a lower flange 73 press-fitted in the lower portion of the sleeve 72. Further, the lower flange 73 is formed with a stepwise outer peripheral portion and is provided with a step portion 74.

A compression spring 75 is attached to the upper portion of the sleeve 72 as a second elastic supporting means. Compression spring 7
The upper end of 5 is locked to the shaft 21, and the lower end is locked to the upper flange 22. That is, the tape pull-out post 71
Is elastically supported so as to be movable in the vertical direction. When the tape withdrawing post 71 is below the compression spring 75, the compression spring 75 is affected by the gravity of the tape withdrawing post 71, but its extension is slightly increased as compared with the case where the VTR is inclined.

Next, as shown in FIG. 7, when the first tape pull-out means is in the B position, the flange stopper 76 serves as post height positioning means so as to engage with the first tape pull-out means.
Is attached to. The flange stopper 76 contacts the step 74 to position the tape pull-out post 71 in the vertical direction. The second slide base on the winding side is the same as the conventional example.

The operation of the tape loading mechanism of the third embodiment constructed as above will be described. When the cassette 1 is mounted at a predetermined position, the slide bases 11, 1
2 is driven by a driving source such as a loading motor,
They move along the guide grooves 27 and 28, respectively. During loading when the slide bases 11 and 12 move from the A position to the B position, the tape pull-out posts 71 and 20 pull out the tape 4 only from the supply reel 2 of the cassette 1 and wind it around the cylinder 6.

At the time of loading, the tape 4 runs from left to right in FIG. 7, but since it becomes an unreasonable running path,
The tape pull-out post 20 which should enter horizontally enters from below. Therefore, the end portion of the tape 4 is pressed against the lower flange of the tape pull-out post 20, but the tension applied to the tape 4 is smaller than that at the time of unloading as in the first embodiment, and thus the tape is not damaged. Will never occur. The slide bases 11 and 12 have the recess 1
After 7 and 18 are engaged with the stopper pins 9 and 10, the guide pins 14 and 16 are brought into contact with the inner circumferences of the guide grooves 27 and 28 to be positioned, and the loading is completed. Further, at this time, the flange stopper 76 and the step portion 74 are engaged with each other, and the vertical position of the tape pull-out post 71 is restricted.

Next, the operation at the time of unloading the slide bases 11 and 12 moving from the B position to the A position will be described. At the time of unloading, the tape 4 runs from right to left in FIG. 7, but since it is an unreasonable running path, it enters the tape pull-out post 71 which should enter horizontally from above. Then, the tape 4 tries to move above the tape pull-out post 71. At this time, tape pull-out post 7
Since 1 is elastically supported by the compression spring 75, the tape 4 moves upward together with the tape pull-out post 71, and as a result, the relative amount of vertical movement of the tape 4 with respect to the upper flange 22 is small. Thus, the perpendicularity of the tape 4 to the axis of the tape pull-out post 71 is secured. Therefore, even if a large tension is applied to the tape 4, its end is not pressed against the upper flange 22 and the tape is not damaged. Then, when the slide bases 11 and 12 return to the inside of the cassette 1, the unloading is completed.

In the first to third embodiments, the description has been made assuming that the tension applied to the tape 4 is small at the time of loading, but the tape can be prevented from being damaged even if a large tension is applied at the time of loading. It is possible. Further, in each of the above-described embodiments, the tape 4 is pulled out from the supply reel 2 at the time of loading and rewound on the supply reel 2 at the time of unloading. However, when the tape 4 is pulled out from the take-up reel 3 and the tape 4 is rewound,
It is possible to prevent the tape from being damaged by providing the first tape pull-out means and the second tape pull-out means at the same positions as in this embodiment. In this embodiment, the first tape pull-out means is provided on the right side of the cylinder 6 and the second tape pull-out means is provided on the left side of the cylinder 6. However, the positions of the first and second tape pull-out means are interchanged. Good.

Further, in the first embodiment, the cutouts 34 and 3 are formed.
7 are the upper and lower flanges 33, 3 of the tape pull-out post 32, respectively.
6 is provided, the upper flange 33 or the lower flange 3
It may be provided only in 6. In this case, it is preferable to provide a notch in the flange on the side where the tape 4 moves during unloading. Further, the post provided with the notch may be another post, and may be a plurality of posts instead of a single post. Further, the cutouts 34 and 37 are formed in about half circumferences of the upper and lower flanges 33 and 36, but the ratio of the cutouts can be changed. Further, the cutout portions 34 and 37 are not limited to the illustrated shapes, and various cutout methods are possible.

Also in the second embodiment, the position, shape, etc. of the notch can be variously changed. Further, by pulling the wire 61 whose one end is locked to the lower flange 56 against the torsion spring 60, the tape pull-out post 52 is moved to the slide base 11.
However, this rotation method can be changed to various methods.

Further, in the third embodiment, the compression spring 75
Although it is provided only on the upper side of the tape pull-out post 71 on the supply side, it may be provided only on the lower side or on both the upper side and the lower side.
Further, the post that elastically supports may be another post, or may be a plurality of posts instead of a single post. Further, although the tape pull-out post 71 is elastically supported by using the compression spring 75, this elastic support method can be changed to various methods. Also, the flange stopper 7
6 and the stepped portion 74 of the lower flange 73 engage with each other to position the tape pull-out post 71 in the vertical direction, but this vertical positioning method can be changed to various methods.

[0061]

As described above, according to the first and second aspects of the present invention, the first tape pull-out post is provided with the flange in which at least one of the upper and lower sides is notched, and the first slide base and the second slide base are provided. The slide base is reciprocated between the tape storage position and the recording / playback position. In this way, the vertical movement allowance of the tape increases by the amount of the notch provided, and even if the tape takes an unreasonable running path during loading or unloading and moves in the direction of the notch, the end of the tape remains It will not be pressed against the upper or lower flange. Therefore, it is possible to prevent the tape from being damaged.

Further, according to the inventions of claims 3 and 4 of the present application, a flange having at least one of upper and lower portions cut out is provided in the first tape pull-out post, and the first slide base and the second slide base are provided.
The slide base is moved back and forth between the tape storage position and the recording / playback position. Then, when the flange of the first tape pull-out post is rotated with respect to the slide base at the recording / reproducing position of the tape, the entire surface of the cutout portion is positioned within the tape winding range of the first tape pull-out post during loading or unloading. be able to. Therefore, the vertical movement allowance of the tape is increased by the amount of the notch provided, and even if the tape becomes an unreasonable running path and moves in the direction of the notch, the end of the tape is pressed against the flange. Will disappear. Therefore, it is possible to prevent the occurrence of damage to the tape more reliably.

Further, according to the inventions of claims 5 and 6 of the present application,
The first tape pull-out post that can move in the vertical direction
The first slide base and the second slide base are reciprocally moved between the storage position and the recording / reproducing position of the tape by elastically supporting them through the elastic supporting means. The height of the first tape pull-out post is fixed by the post height determining means at the recording / reproducing position of the tape. In this way, the tape becomes an unreasonable running path during loading or unloading, and even if the tape tries to move in the vertical direction, the first tape pull-out post can move up and down together with the tape, and the tape can move relative to the flange in the vertical direction. The amount of movement is reduced. For this reason, the incident angle of the tape with respect to the tape pull-out post is reduced, so that the end portion of the tape is not pressed against the flange, and the occurrence of damage to the tape can be prevented.

[Brief description of drawings]

FIG. 1 is a plan view of a magnetic recording / reproducing apparatus including a tape loading mechanism according to a first embodiment of the present invention.

FIG. 2 is a perspective view of a first tape pull-out means used in the tape loading mechanism of the first embodiment.

FIG. 3 is an explanatory view showing an engagement relationship between a first tape pull-out means and a leaf spring in the tape loading mechanism of the first embodiment.

FIG. 4 is a plan view of a magnetic recording / reproducing apparatus including a tape loading mechanism according to a second embodiment of the present invention.

FIG. 5 is a perspective view of a first tape pull-out means used in the tape loading mechanism of the second embodiment.

FIG. 6A is an exploded perspective view showing a configuration of a first tape pull-out means of a second embodiment, and FIG. 6B is a perspective view of a locking claw that engages with the first tape pull-out means. is there.

FIG. 7 is a plan view of a magnetic recording / reproducing apparatus including a tape loading mechanism according to a third embodiment of the present invention.

FIG. 8 is a perspective view of first tape pull-out means used in the tape loading mechanism of the third embodiment.

FIG. 9 is a plan view of a magnetic recording / reproducing apparatus including a conventional tape loading mechanism.

FIG. 10 is a perspective view of a tape pull-out means used in a conventional tape loading mechanism.

[Explanation of symbols]

 1 cassette 2 supply reel 3 take-up reel 4 tape 5 chassis 6 cylinder 7 supply reel stand 8 take-up reel stand 9,10 stopper pin 11,12,31 slide base 13-16 guide pin 17,18 recessed part 19,20,32 , 52, 71 Tape pull-out post 21 Post shaft 22, 33, 53 Upper flange 23 Roller 24, 37, 56, 73 Lower flange 25, 26 Inclined post 27, 28, 39 Guide groove 34, 37, 54, 57 Notch 35 , 38, 55, 58 Tape height regulating portion 40 Detent pin 41 Leaf spring 59 Shaft 59a Shaft holder 60 Torsion spring 61 Wire 62 Tube portion 63 Pulling piece 64 Locking claw 72 Sleeve 74 Step portion 75 Compression spring 76 Flange stopper

Claims (6)

[Claims] 1. A tape loading mechanism that guides the tape between a storage position where the tape is stored in a cassette and a recording / reproducing position where the tape is wound around a cylinder. A first slide base that slidably reciprocates between the first and second slide bases, and at least one side surface that abuts the tape when the first slide base is reciprocating is cut. A first tape pull-out post having a notched upper flange and lower flange and a roller; and a tape sliding surface of the cylinder, which is erected on the first slide base in the vicinity of the first tape pull-out post. First tape pull-out means for guiding the tape wound around the supply reel of the cassette, the first tape pull-out means having a first inclined post inclined substantially in parallel, and storing and storing the tape. A second slide base that reciprocally slides between recording and reproducing positions; a second tape pull-out post that is vertically installed on the second slide base and has an upper flange and a lower flange and a roller; A second slide base is provided upright in the vicinity of the second tape pull-out post, and has a second tilted post tilted substantially parallel to the tape sliding surface of the cylinder. A second tape pull-out means provided on the opposite side of the tape pull-out means for guiding the tape wound around the take-up reel of the cassette, and the first tape pull-out means for storing and recording / reproducing the tape. A tape loader comprising: first driving means for guiding the second tape, and second driving means for guiding the second tape pulling-out means to the tape storing and recording / reproducing positions, respectively. Mechanism. 2. The first drive means, when the first slide base comes to a recording / reproducing position of the tape, abuts on the first slide base and serves as a rotation center thereof, and a stopper pin, A rotating member for rotating the first slide base so as to hold the tape at the notched portions of the upper flange and the lower flange; and when the first slide base is in the storage position of the magnetic tape. 2. The tape loading mechanism according to claim 1, further comprising: a leaf spring that biases the first slide base in the same posture; and a detent pin that regulates a rotational position of the first slide base. 3. A tape loading mechanism for guiding the tape between a storage position where the tape is stored in a cassette and a recording / reproducing position where the tape is wound around a cylinder. A first slide base that slidably reciprocates between the first and second slide bases, and at least one side surface that abuts the tape when the first slide base is reciprocating is cut. A first tape pull-out post having a notched upper flange and a lower flange and a roller, a first elastic support means for applying a biasing force for rotating the first tape pull-out post in one direction, and the first slide. The base has a first inclined post that is erected close to the first tape pull-out post and that is inclined substantially parallel to the tape sliding surface of the cylinder. First tape pull-out means for guiding the tape wound around the supply reel, second slide base reciprocally sliding between the storage and recording / reproducing positions of the tape, and perpendicular to the second slide base. A second tape pulling-out post having an upper flange and a lower flange and a roller, and a second tape pulling-up post standing on the second slide base in the vicinity of the second tape pulling-out post, and the tape sliding of the cylinder. A second inclined post that is inclined substantially parallel to the surface, is provided on the opposite side of the cylinder from the first tape pull-out means, and guides the tape wound around the take-up reel of the cassette; Second tape pulling means, first driving means for guiding the first tape pulling means to the tape storing and recording / reproducing positions, and the second tape pulling means for storing and recording the tape. Second driving means for guiding the tape to a reproducing position, and the first tape pulling means for moving the upper flange and the lower flange to the first flange when the recording / reproducing position of the tape is reached.
And a flange rotation means for rotating the slide base with respect to the slide base. 4. The first tape pulling-out means, a wire having one end attached to the lower flange and the other end penetrating a tubular portion fixed to the first slide base, and the first slide base. A pulling piece that is slidably attached to the wire and connects the other end of the wire, and the flange rotating means is such that the first tape pulling-out means comes to a recording / reproducing position of the tape. At this time, it is a locking claw that engages with the pulling piece and rotates the first slide base so as to hold the tape at the notched portion of the upper flange and the lower flange. The tape loading mechanism according to claim 3. 5. A tape loading mechanism for guiding the tape between a storage position where the tape is stored in a cassette and a recording / reproducing position where the tape is wound around a cylinder. A first slide base that slides back and forth between the first slide base, a first tape pull-out post that is vertically movably erected on the first slide base and that has an upper flange, a lower flange, and a roller;
Second elastic support means for elastically supporting the first tape pull-out post in the up-down direction, standing upright on the first slide base in the vicinity of the first tape pull-up post, and sliding the cylinder tape. Between the tape storing and recording / reproducing position of the tape, a first tape pull-out means having a first inclined post inclined substantially parallel to the moving surface and guiding the tape wound around the supply reel of the cassette. A second slide base that slides reciprocally; a second tape pull-out post that is vertically installed upright on the second slide base and that has an upper flange and a lower flange and a roller; A second taper post is provided upright in the vicinity of the second tape drawer post, and has a second inclined post that is inclined substantially parallel to the tape sliding surface of the cylinder, and is on the opposite side of the cylinder from the first tape drawer means. Second tape pull-out means for guiding the tape wound around the take-up reel of the cassette, and first tape-drawing means for guiding the first tape pull-out means to the tape storage and recording / reproducing positions, respectively. Drive means, second drive means for guiding the second tape pull-out means to the storage and recording / reproducing positions of the tape respectively, and when the first tape pull-out means comes to the recording / reproducing position of the tape, Post height positioning means for contacting at least one of the upper flange and the lower flange and for holding the first tape pull-out post at a predetermined height with respect to the slide base. . 6. The second elastic support means is a torsion spring having one end attached to the upper flange and the other end attached to an upper end portion of the first tape pulling post, and the post height positioning is performed. When the first tape pull-out means comes to the recording / reproducing position of the tape, the means abuts on a step portion formed stepwise on the outer peripheral portion of one of the flanges of the first tape pull-out post. 6. The tape loading mechanism according to claim 5, further comprising a flange stopper that holds the height of the first tape pull-out post constant.