JPH0710830U - Magnetic recording / reproducing device - Google Patents

Abstract

(57) [Abstract] [Object] The present invention relates to a magnetic recording / reproducing apparatus having a loading post for forming a predetermined tape path,
The purpose is to be able to position the loading post accurately. A magnetic recording / reproducing apparatus having a loading post 45 for pulling out a magnetic tape 55 from a tape cassette and forming a predetermined tape path in accordance with a rotating operation of a loading arm 48.
Shaft 56 fixed to the loading arm 48
And a tape guide 57 that is attached to the shaft 56 in a displaceable manner, and contacts the tape guide 57 when the loading post 45 rotates to a predetermined loading position. A stopper 64 having a V-shaped groove 65 for positioning the tilt angle and the tilt direction of 57 at a predetermined angle and direction.
Was set up.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a magnetic recording / reproducing apparatus, and more particularly to a magnetic recording / reproducing apparatus having a loading post for forming a predetermined tape path.

[0002]

[Prior art]

 A so-called DAT (digital audio tape recorder) is known as a magnetic recording / reproducing apparatus. This DAT drives a plurality of posts such as a loading post attached to a loading base and a guide arm and a pinch roller attached to a pinch roller arm to drive a magnetic tape from a tape cassette mounted in the device. A tape path is formed that pulls out and attaches to the rotating cylinder over a specified range.

FIG. 5 shows the structure of a conventional loading post. The loading post 1 shown in the figure is a P6 post because it is the sixth loading post from the upstream side with respect to the flow of the magnetic tape in the normal running state. The loading post 1 is integrated with a driving mechanism of the pinch roller 2 in order to simplify the structure.

The loading post 1 is erected on a loading arm 4 which is supported by a support shaft 3 which is planted in a DAT chassis (not shown). Further, the pinch roller 2 is erected on a pinch roller arm 6 supported by a support shaft 5 which is also planted in the chassis. The loading arm 4 and the pinch roller arm 6 are connected by a coil spring 7 so that both arms 4 and 6 can move integrally.

Further, both arms 4 and 6 are configured to be driven by a cam plate 8 shown by a chain line in the figure, and the cam plate 8 is driven in the directions of arrows A1 and A2 in the figure by a mode motor (not shown). It Specifically, an engaging pin 9 is implanted in the loading arm 4, and the engaging pin 9 engages with a cam groove 10 formed in the cam plate 8.

The engagement pin 9 is displaced along the shape of the cam groove 10 by the cam plate 8 which moves in the A1 direction at the time of tape loading, whereby the loading arm 4 is rotated at a predetermined timing. Along with this, the pinch roller arm 6 connected by the coil spring 7 also rotates, and the pinch roller 2 is rotationally displaced to a predetermined position where it abuts on the capstan 11.

On the other hand, FIG. 6 shows the structure of a conventional loading post 1. As shown in the figure, the conventional loading post 1 is composed of a bush 12 embedded in the loading arm 4 and a shaft 13 fitted and fixed to the bush 12. Therefore, in the loading post 1 having the conventional structure, once the bush 12 and the shaft 13 are assembled to the loading arm 4, the tilt angle and direction of the shaft 13 with respect to the loading arm 4 cannot be adjusted.

FIG. 5 shows a state in which the tape loading is completed, and in the figure, 14 is a magnetic tape, 15 is a guide member for guiding and holding the pinch roller arm 6, and 16 and 17 are. Figure 7 shows another post mounted on a loading base (not shown).

[0009]

[Problems to be solved by the device]

 In recent years, magnetic tapes have been made thinner in order to lengthen the recording time. By making the magnetic tape thin, the amount of magnetic tape that can be wound around the tape cassette increases, enabling long-term recording and playback, while thinning the magnetic tape reduces the rigidity of the magnetic tape. Is known to do.

Further, the running speed of the magnetic tape is also improved, and the search speed can be increased by increasing the tape running speed.

However, as the magnetic tape becomes thinner and the tape running speed becomes faster, the accuracy of the loading post greatly affects the stability of the tape running. That is, when the magnetic tape becomes thinner and the tape rigidity decreases, the magnetic tape will be guided while faithfully following the inclination and direction of the loading post. Also, due to the increased tape running speed, the tape running position will deviate more than the predetermined running position even if the loading post tilt angle and tilt direction are slightly displaced.

Here, paying attention again to the conventional loading post 1 shown in FIG. 5, the conventional loading post 1 is configured such that the loading post 1 is simply provided upright on the loading arm 4. In the loaded state (ie, the state shown in FIG. 5), the loading post 1 is supported only by the loading arm 4.

For this reason, when the loading post 1 is deviated in the inclination angle or the inclination direction due to an assembly error or the like, the tape traveling position is largely deviated from the predetermined traveling position as described above, and thus the tape is appropriately moved. There was a problem that proper magnetic recording and reproduction could not be performed.

Further, in the configuration shown in FIG. 5, since the loading arm 4 and the pinch roller arm 6 are connected by the coil spring 7, when the pinch roller 2 is pressed against the capstan 11, the coil spring Since a pulling force acts on the loading arm 4 by means of 7, there is a problem that the tilting angle and the tilting direction of the loading post 1 may also be displaced due to this.

The present invention has been made in view of the above points, and it is an object of the present invention to provide a magnetic recording / reproducing apparatus capable of accurately positioning a loading post.

[0016]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the present invention comprises a loading post that is provided upright on a loading arm and that draws a magnetic tape from a tape cassette and forms a predetermined tape path in accordance with the rotation operation of the loading arm. In a magnetic recording / reproducing apparatus, the loading post is composed of a shaft fixed to a loading arm and a tape guide attached so as to be displaceable with respect to the shaft, and the loading post is rotated to a predetermined loading position. When the tape guide is moved, the stopper is provided so as to come into contact with the tape guide and position the tilt angle and the tilt direction of the tape guide at a predetermined angle and direction.

[0017]

[Action]

 With the above configuration, the tape guide fixed to the loading arm and attached so as to be displaceable with respect to the shaft positions the tilt angle and tilt direction at a predetermined angle and direction by contacting the stopper. To be done. Therefore, even if the loading post is misaligned in the tilt angle or tilt direction due to an assembly error or the like, these errors are corrected by the tape guide coming into contact with the stopper and being displaced, and the proper tilt angle and Positioned in the tilt direction.

[0018]

【Example】

 Next, an embodiment of the present invention will be described with reference to the drawings.

2 and 3 are general views of a magnetic recording / reproducing apparatus 20 (hereinafter, simply referred to as a device) according to an embodiment of the present invention. FIG. 2 shows the device 20 in the eject state, and FIG. 3 shows the device 20 in the loading state (magnetic recording / reproducing state).

The device 20 shown in each drawing is a rotary type digital audio tape recorder, and is provided on the chassis 21 with a cassette loading / unloading mechanism 22 and a reel stand device (because it is disposed under the cassette loading / unloading mechanism 22). (Not shown), a rotary cylinder 23, a tape loading mechanism 24, etc. are provided. First, a description will be given of a schematic configuration of each of the above-described mechanisms and devices that configure the device 20.

The cassette loading / unloading mechanism is for loading a tape cassette (not shown) in a predetermined recording / reproducing processing position in the apparatus 20, and by moving the cassette holder 25 into which the tape cassette is inserted, It is configured to attach and detach the cassette. The cassette holder 25 is configured to move in the directions of arrows A1 and A2 in the drawing via a mode cam mechanism 27, a drive lever 28, a link 29, etc. by a driving force of a mode motor 26. The cassette holder 25 moves in the A2 direction during loading, and the cassette holder 25 moves in the A1 direction during ejecting.

The reel stand device is a mechanism for rotationally driving the supply-side reel device and the winding-side reel device. In the present embodiment, the supply-side reel device and the winding-side reel device are respectively constituted by reel motors. Also, the so-called direct drive method is adopted. Therefore, the reel stand device has an extremely simple structure. Further, each reel device is configured such that its rotation speed, rotation direction, etc. are controlled by the mode of the device 20 (for example, recording / playback mode, fast-forward / rewind mode, search mode, etc.).

The rotary cylinder 23 is attached to the drum base 30. The rotary cylinder 23 has a diameter of about 30 mm, and the magnetic tape is wound around the rotary cylinder 23 at a predetermined angle. The rotary cylinder 23 has a diameter substantially the same as the diameter of the drum motor that drives the rotary cylinder 23. Therefore, the rotary cylinder 23 is coaxially arranged on the upper portion of the motor to have a compact structure. Further, the rotary cylinder 23 is provided with magnetic heads at intervals of, for example, 90 °, and the magnetic heads are configured to perform helical scanning on a magnetic tape to perform magnetic recording / reproducing.

The tape loading mechanism 24 is a mechanism for pulling out the magnetic tape from the tape cassette and winding the magnetic tape around the rotary cylinder 23 at a predetermined angle. The tape loading mechanism 24 adopts so-called M loading, and a pair of loading bases 31 and 32 are moved along guide grooves 33 and 34 formed in the chassis 21 by a link mechanism (not shown), and along with this. It is configured to load or eject the magnetic tape. On the pair of loading bases 31 and 32, loading posts 35 and 36 and inclined poles 37 and 38 are erected.

Further, 39 is a pinch roller arranged on the pinch roller arm 40, and is moved by the rotation operation of the pinch roller arm 40 accompanying the tape loading operation to come into contact with the capstan 41. The magnetic tape runs at a predetermined tape running speed by running while being sandwiched between the capstan 41 and the pinch roller 39. Further, on the chassis 21, a plurality of loading posts 42 to 45 for forming a predetermined magnetic tape are erected, and a tension pole 46 is erected to detect the tape tension of the magnetic tape. A tension arm 47 is provided.

It should be noted that the apparatus 10 is configured such that a major part of the reel stand apparatus and the tape loading mechanism 24 described above is disposed in a sub-chassis 48 that moves up and down with respect to the chassis 21. The sub-chassis 48 is configured to move up during the loading operation and move down during the ejection. As described above, the reel stand device and the tape loading mechanism 24 are arranged in the sub chassis 48, and the sub chassis 48 is moved up and down in accordance with the loading / ejecting operation, whereby the device 10 can be made thin.

In the apparatus 10 configured as described above, the present invention is characterized by the loading post 45 that constitutes the tape loading mechanism 24. This loading post 45 is a P6 post because it is the sixth loading post from the upstream side in the running direction of the magnetic tape in the normal running state. Hereinafter, the loading post 45, which is a feature of the present invention, will be described in detail.

FIG. 1 is an enlarged view of the loading post 45. The loading post 45 is integrated with the driving mechanism of the pinch roller 39 for the purpose of simplifying the structure like the conventional loading post 1 described with reference to FIG. The drawing shows the loading post 45 in the loading state (magnetic recording / reproducing state).

The loading post 45 is erected on the loading arm 48. The loading arm 48 is supported by a support shaft 49 that is planted in the chassis 21, so that the loading post 45 moves when the loading arm 48 rotates. The pinch roller 39 is erected on a pinch roller arm 40 supported by a support shaft 50 which is planted in the chassis 21.

The loading arm 48 and the pinch roller arm 40 are connected by a coil spring 51, and both arms 40 and 48 are configured to move integrally. Further, both arms 40 and 48 are configured to be driven by a cam plate 52 shown by a chain line in the figure, and the cam plate 52 is connected to a mode cam mechanism 27 driven by a mode motor 26.

The cam plate 52 is driven in the directions of arrows B1 and B2 in the figure by the driving force of the mode motor 26 and at a predetermined timing controlled by the mode cam mechanism 27. Specifically, an engaging pin 53 is implanted in the loading arm 48, and the engaging pin 53 engages with a cam groove 54 formed in the cam plate 52.

Then, the engagement pin 53 is displaced along the shape of the cam groove 54 by the cam plate 52 which moves in the B1 direction at the time of tape loading, whereby the loading arm 48 is centered on the support shaft 49 at a predetermined timing. Rotate. Along with this, the pinch roller arm 40 connected by the coil spring 51 also rotates, and the pinch roller 39 contacts the capstan 41.

With the pinch roller 39 in contact with the capstan 41, the magnetic tape 55 pulled out from the tape cassette is in a state of being interposed between the pinch roller 39 and the capstan 41. Since the capstan 41 maintains a constant rotation speed, the pinch roller 39 and the magnetic tape 55 sandwiched by the capstan 41 run at a constant speed.

Here, the structure of the loading post 45 is shown in FIG. As shown in the figure, the loading post 45 is composed of a shaft 56 fixed to the loading arm 48 in an upright state, and a tape guide 57 attached to the shaft 56. At a position near the tip of the shaft 56, a cap 59 having a recess 58 formed in the center is provided.

The tape guide 57 is a tubular member, and a convex portion 60 having a triangular cross section is formed at the center position of the inner circumference. The surface of the tubular portion 61 of the tape guide 57 is a mirror surface for improving the sliding contact with the magnetic tape 55, and the upper and lower end portions thereof have a flange portion 62 for restricting the traveling position of the magnetic tape 55. , 63 are formed.

Then, the tape guide 57 is attached to the shaft 56 by engaging the convex portion 60 formed on the tape guide 57 with the concave portion 58 formed on the shaft 56. Further, since the concave portion 58 and the convex portion 60 are engaged with each other in a loosely fitted state within a range where the tape guide 57 does not come off the shaft 56, the tape guide 57 is in the direction indicated by the arrow C in the figure with respect to the shaft 56. It has a displaceable configuration.

Returning to FIG. 1 again, the description will be continued. In the figure, reference numeral 62 denotes a pinch roller arm holding member provided to support the pinch roller arm 40, and a holding groove (not shown in the figure) that engages with the loaded pinch roller arm 40 is formed. When the pinch roller arm 40 enters and engages with the holding groove, the vertical movement of the pinch roller arm 40 (that is, the pinch roller 39) (the vertical direction with respect to the paper surface) is restricted, and the magnetic tape 55 is stabilized. Driving is guaranteed. The pinch roller arm holding member 62 is fixed to the chassis 21 with screws 63.

A stopper 64, which is an essential part of the present invention, is disposed at a predetermined loading position where the loading post 45 is loaded. The stopper 64 is fixed to the chassis 21 by screws 63 together with the pinch roller arm holding member 62.

The stopper 62 has a V-shaped groove 65 with which the tape guide 57 provided on the loading post 45 is brought into contact. The V-shaped groove 65 regulates the position of the abutted tape guide 57. Therefore, the shape of the V-shaped groove 65 is such that the tilt angle and the tilt direction of the tape guide 57 are in contact with the tape guide 57. It is configured to position at a predetermined angle and a predetermined direction.

On the other hand, as described above, in the loading post 45, the tape guide 57 is displaceable with respect to the shaft 56 in the direction indicated by the arrow C in FIG. The tape guide 57 is displaced along the shape of the V-shaped groove 65 by being brought into contact with. Therefore, the tape guide 57 is regulated by the shape of the V-shaped groove 65, so that the tape guide 57 is positioned at a predetermined angle and a predetermined direction.

Therefore, even if the loading post 45 (specifically, the shaft 56) is deviated in the inclination angle or the inclination direction due to an assembly error or the like, these errors are caused by the V-shaped stopper 64 of the tape guide 57. Since it is corrected by coming into contact with and displacing the groove 65, it is positioned at an appropriate tilt angle and tilt direction. As a result, the magnetic tape 55 can be made thinner, and stable tape running can be realized without fluctuations in the running position even if the tape running speed increases, and good magnetic recording / reproducing characteristics can be maintained.

Further, since the loading arm 48 is configured such that the turning force is urged so as to press the loading post 45 toward the stopper 62 even after the tape guide 57 abuts on the V-shaped groove 64, the V-shape is provided. The tape guide 57 contacting the groove 64 does not rattle against the stopper 62.

In the above-described embodiment, in the structure of the loading post 45, the cap 59 is provided with the concave portion 58 so that the tape guide 57 can be displaced with respect to the shaft 56, and the inside of the tubular portion 61 is formed. Although the convex portion 60 is formed in the above, the convex portion and the concave portion may be reversely arranged by the cap 59 and the tubular portion 61. Other structures may be used as long as the tape guide 57 can be displaced with respect to the shaft 56.

In the above embodiment, the V-shaped groove 65 of the stopper 64 is formed to position the tape guide 57. However, the tape guide 57 can be positioned at a predetermined tilt angle and tilt direction. If necessary, the tape guide 57 may be positioned by a configuration other than the V-shaped groove 65.

Further, in the present embodiment, the DAT has been described as an example of the magnetic recording / reproducing apparatus, but it is needless to say that the present invention can be applied to other magnetic recording / reproducing apparatus such as a video tape recorder. .

[0046]

[Effect of device]

 As described above, according to the present invention, even if the shaft of the loading post is deviated in the inclination angle or the inclination direction due to an assembly error or the like, these errors are corrected by the tape guide coming into contact with the stopper and being displaced. Therefore, the magnetic tape is positioned at an appropriate tilt angle and tilt direction, which makes it possible to realize a stable tape running without changing the running position even if the magnetic tape becomes thinner and the tape running speed becomes faster. It has features such as maintaining characteristics.

[Brief description of drawings]

FIG. 1 is an enlarged view showing a vicinity of a loading post and a pinch roller when a magnetic recording / reproducing apparatus according to an embodiment of the present invention is in a loading state.

FIG. 2 is a plan view of a magnetic recording / reproducing apparatus according to an embodiment of the present invention when it is in an ejecting state.

FIG. 3 is a plan view of the magnetic recording / reproducing apparatus according to the embodiment of the present invention when it is in a loading state.

FIG. 4 is an enlarged view of a loading post.

FIG. 5 is an enlarged view showing the vicinity of a loading post and a pinch roller provided in a magnetic recording / reproducing apparatus as an example of the related art.

FIG. 6 is an enlarged view of a conventional loading post.

[Explanation of reference numerals] 20 magnetic recording / reproducing apparatus 21 chassis 22 cassette loading / unloading mechanism 23 rotating cylinder 24 tape loading mechanism 25 cassette holder 26 mode motor 27 mode cam mechanism 39 pinch roller 40 pinch roller arm 41 capstan 45 loading post 48 loading arm 51 Coil spring 52 Cam plate 53 Engaging pin 54 Cam groove 55 Magnetic tape 56 Shaft 57 Tape guide 58 Recessed portion 59 Cap 60 Convex portion 61 Cylindrical portion 62 Pinch roller arm holding member 64 Stopper 65 V-shaped groove

Claims (1)

[Scope of utility model registration request] 1. A loading arm is provided upright,
In a magnetic recording / reproducing apparatus equipped with a loading post for drawing a magnetic tape from a tape cassette and forming a predetermined tape path in accordance with the rotating operation of the loading arm, a shaft fixed to the loading arm, and a shaft fixed to the loading arm. And a tape guide attached so as to be displaceable with respect to the shaft. When the loading post rotates to a predetermined loading position, the tape comes into contact with the tape guide, and the inclination angle and the inclination direction of the tape guide are predetermined. A magnetic recording / reproducing apparatus having a stopper for positioning in an angle and a direction.