JP2001067751A - Magnetic recording and reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To constitute a tape sag preventing device without increasing the number of parts by abutting a bracket for retaining a tension band on a spring for pressing a tension arm, in the state of completion of unloading, tightening the tension band and imparting a load to a feeding reel. SOLUTION: A magnetic tape 12 wound on a cylinder 20 is taken up on a reel on the S reel base 57 side of a cassette 10 by the driving of a capstan motor 40, stored in the cassette 10 and put in a state of completion of unloading (a state where the cassette 10 is set at a prescribed position, with no magnetic tape 12 drawn out). In this case, the bracket 65 is such that a projection 65a comes into contact with a spring 63 and that a tension band 64, pushed by the spring 63, rotates in the direction tightening the S reel base 57. Consequently, the tension band 64 tightens the S reel base 57, giving it a light load.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a magnetic recording / reproducing apparatus.

[0002]

2. Description of the Related Art In a recent magnetic recording / reproducing apparatus, reducing the cost by reducing the number of parts is the most important issue.

In a conventional magnetic recording / reproducing apparatus, a cassette of a magnetic tape inserted into a cassette insertion slot is moved to a predetermined position in the magnetic recording / reproducing apparatus by a cassette mounting apparatus and mounted (hereinafter referred to as an unloading completed state). Thereafter, the magnetic tape is pulled out from the supply (S) reel of the cassette and wound around a cylinder to be in a recordable / reproducible state (hereinafter referred to as a loading completed state). In this process, if the tape reel diameter of the S reel is large and the inertia of the magnetic tape is large, the magnetic tape may jump out to the traveling system when the cassette is mounted. When the magnetic tape does not fit within the predetermined position of the guide roller, the end of the magnetic tape may be damaged, or the magnetic tape may fall off the guide member and the magnetic tape may not be wound around the predetermined position of the cylinder. is there.

For this reason, when the cassette is mounted at a predetermined position, a light load (braking force) is applied to the S-reel base so as not to lose the inertial force of the magnetic tape. Specifically, a tension portion is provided on a spring force adjusting member that supports a tension spring that pulls a tension arm that applies tension to a magnetic tape wound around a cylinder, and a tension band that supports a tension band that applies a braking force to an S reel base. There is provided a slack preventing device configured to press the holding member by the pressing portion.

Such a magnetic recording and reproducing apparatus is disclosed in
No. 0-11842.

[0006]

However, such a loosening prevention device is not suitable for a magnetic recording / reproducing apparatus in which the position of the member for adjusting the spring force and the position of the member for holding the tension band are largely separated. It is difficult to directly press the member that supports the tension band by the pressing portion provided on the member to be formed, and the number of components increases because mediation of an auxiliary member is required.

An object of the present invention is to configure a slack preventing device in a magnetic recording / reproducing apparatus in which a member for adjusting a spring force and a member for holding a tension band are largely separated from each other without increasing the number of components. .

[0008]

SUMMARY OF THE INVENTION In the present invention, when the unloading is completed, the bracket holding the tension band is brought into contact with the spring for urging the tension arm to wind the tension band and supply the reel. By applying a load to the device, a loosening prevention device is realized without increasing the number of components.

[0009] More specifically, a take-up reel table on the side where the magnetic tape is wound, a supply reel table on the side supplying the magnetic tape, and a method for applying an appropriate tape tension to the magnetic tape during recording or reproduction. A tension band wound around the supply reel table, a tension arm for holding the tension band via a bracket, and a spring member for generating a tension applied to the magnetic tape by the tension arm, and pulled out of the cassette. In a magnetic recording / reproducing apparatus that performs recording and reproduction by transferring the magnetic tape wound around a rotary cylinder on which a magnetic head is mounted at a predetermined angle and performing recording and reproduction, the magnetic tape wound around the rotary cylinder is housed in the cassette. At this time, the bracket holding the tension band is And seamed the tension band by contact, characterized in that a means for applying a load to the supply reel table.

[0010] The means for adding to the supply reel table may be configured such that one of the two brackets holding the tension band is applied to the sprocket while the magnetic tape wound around the cylinder is housed in a cassette. The tension band is wound up by contacting the other bracket with the tension arm to apply a load to the supply reel table.

Further, the present invention is characterized in that the sprung body is arranged along a bracket and a tension band.

[0012]

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

FIG. 1 is a plan view of a magnetic recording / reproducing apparatus according to a first embodiment of the present invention in a recording / reproducing mode. A cassette 10 accommodating a magnetic tape 12 is mounted by a cassette mounting device (not shown). A state in which the magnetic tape 12 is pulled out from the cassette 10 after being mounted at a predetermined position in the main body of the magnetic recording / reproducing apparatus and wound around the cylinder 20 (hereinafter referred to as a loading completed state)
Is shown in perspective.

The magnetic tape 12 accommodated in the cassette 10 mounted at a predetermined position on the main body by a cassette mounting device (not shown) has tape guides 30, 31 and guide pins 33, 34 in the directions of arrows A, B. By rotating, it is pulled out of the cassette 10 and wound around the cylinder 20 at a predetermined angle. Tape guides 30, 31
The guide pins 33 and 34 are driven to rotate by transmitting the rotation of the loading motor 81 via a gear (not shown) or the like. The magnetic tape 12 is further guided by guide pins 32-34, 36, and 37.

A tension pin 35 attached to a tension arm 61 rotatably supported by a support pin 60 erected on the base 23 is urged in the direction of arrow C to apply a predetermined tension to the magnetic tape 12. This urging force is applied to the tension arm 61 and the arm 6 which is a member for adjusting the spring force.
2 and a bracket 65 and a tension band 64
The tension arm 61 is generated by urging the tension arm 61 with a spring 63 of a tension spring stretched along the axis, and the urging force can be changed by rotating the arm 62. The rotation of the arm 62 is realized by transmitting the rotation of the loading motor 81 via a gear (not shown) or the like.

The cylinder 20 is rotatably supported on the substrate 28. A plurality of recording / reproducing heads (not shown) are attached to the cylinder 20. When the cylinder 20 rotates in the direction of arrow D, the cylinder 20 is formed obliquely on the magnetic tape 12 using the recording / reproducing head. The information is recorded on the recording track to be reproduced, and the information is reproduced from the recording track.

At a position between the tape guide 30 and the guide pins 32, an erasing head 22 that comes into contact with the magnetic tape 12 is provided so that information recorded on the magnetic tape 12 can be erased.

The magnetic tape 12 is mounted on the capstan motor 4.
0 and the pinch roller 4 provided on the rotation axis
In the recording / reproduction mode, the magnetic tape 12 is transported at a constant speed by rotating the capstan motor 40 in the direction of arrow E at a constant speed.

The capstan tree 46 is provided on a rotating shaft of the capstan motor 40 so as to rotate integrally with the rotating shaft. The rotation of the capstan 42 is transmitted to a pulley 50 via a belt 48 hung on a capstan pulley 46. The rotation of the pulley 50 is transmitted to a take-up (T) reel table 54 via a take-up gear 51, a gear 52, and a swing gear 53. The take-up reel is driven inside the cassette 1 so that the magnetic tape 12 transferred at a constant speed is
Take up on the take-up reel within 0.

At this time, the supply (S) reel base 57 is on the supply side of the magnetic tape 12 and sends out the magnetic tape 12 from the supply reel in the cassette 10. Further, a load (braking force) is applied to the S reel base 57 by the tension band 64, and a predetermined tension is applied to the magnetic tape 12 to be sent out. Note that the tension bands 64 are brackets 65, 6 which are members for supporting the tension bands 64.
The bracket 65 is rotatably attached to the tension arm 61 via the bracket 6, and the bracket 65 is separated from the spring 63 in this loading completed state.

The rotation of the pulley 50 is controlled by the take-up gear 51, the gear 52, the swing gear 53, and the gears 55 and 56.
Is transmitted to the S reel table 57 via the
Becomes the winding side and rewinds the magnetic tape 12 to the supply reel in the cassette 10.

Next, a state of the unloading completed state (a state where the cassette is mounted at a predetermined position but the magnetic tape is not pulled out) in the magnetic recording / reproducing apparatus of this embodiment will be described with reference to FIG. Will be explained.

FIG. 2 is a plan view of the magnetic recording / reproducing apparatus according to the first embodiment of the present invention in a state where unloading is completed, and shows the cassette 10 in a see-through manner.

The magnetic tape 12 wound around the cylinder 20 is wound on a reel on the S reel table 57 side of the cassette 10 by driving the capstan motor 40 and stored in the cassette 10.

At this time, the tape guides 30, 31 and the guide pins 33, 34 rotate in the directions of the arrows F and G, and the guide pin 37 rotates in the direction of the arrow H.
It is stored in a predetermined position in the cassette 10. The rotation of the tape guides 30, 31 and the guide pins 33, 34 and the guide pin 37 is realized by transmitting the rotation of the loading motor 81 via a gear (not shown) or the like. Further, the tension arm 61 is rotated in the direction of arrow J by a drive gear (not shown) and stored in a predetermined position.

At this time, the bracket 65 is pushed by the projecting body 63 when its projection 65a contacts the projecting body 63, and the tension band 64
7, and the bracket 66 abuts against a positioning stopper 67 to regulate its position.
Therefore, the tension band 64 winds the S reel base 57 and applies a light load to the S reel base 57.

When the unloading is completed in this state, the cassette mounting device (not shown) operates to discharge the cassette 10 to the cassette insertion slot.

Next, when the cassette 10 is inserted into the cassette insertion slot, a cassette mounting device (not shown) operates to move the cassette 10 to a predetermined position and mount it. At this time, for example, when the tape winding diameter on the S reel base 57 side is large and the inertia force of the magnetic tape 12 is large, the magnetic tape 12 may fly out due to inertia.
As described above, since a light load is applied to the reel base 57 by the tension band 64, it is possible to prevent the magnetic tape 12 from jumping into the traveling system due to inertia.

Accordingly, the tape guides 30, 31 and the guide pins 33, which move during the loading.
The magnetic tape 12 does not fit within the predetermined position of the cylinder 20, and the end of the magnetic tape 12 may be damaged, or the magnetic tape 12 may fall off the tape guides 30, 31 and the guide pins 33, 34, and the predetermined position of the cylinder 20 This prevents the magnetic tape 12 from being wound around.

Next, a second embodiment of the present invention will be described with reference to FIG. FIG. 3 is a plan view showing the unloading completed state of the magnetic recording / reproducing apparatus in this embodiment, and shows the cassette 10 in a see-through manner.

The magnetic tape 12 wound around the cylinder 20, the tape guides 30, 31, and the guide pins 3
The guide pins 37 are accommodated in the cassette 10 at predetermined positions. Similarly, the tension arm 69 is stored at a predetermined position.

In this embodiment, the projection 65a of the bracket 65 abuts against the spliced body 63 to urge the tension band 64 in the direction of winding the S reel base 57, and the bracket 66 includes a tension arm 69. The tension band 64 tightens the S-reel base 57 to apply a light load to the S-reel base 57 by contacting the arm 69a protruding from the base and restricting the position thereof. .

The other configuration is the same as that of the first embodiment, so that the same reference numerals are given and the duplicate description will be omitted.

[0034]

According to the present invention, a magnetic tape in an unloading state without increasing the number of parts even in a magnetic recording / reproducing apparatus in which the position of a member supporting a projection and a member holding a tension band is largely separated. Can be realized.

[Brief description of the drawings]

FIG. 1 is a plan view showing a completed loading state in a recording / reproducing mode in a magnetic recording / reproducing apparatus according to a first embodiment of the present invention.

FIG. 2 is a plan view of the magnetic recording and reproducing apparatus according to the first embodiment of the present invention in a state where unloading is completed.

FIG. 3 is a plan view of a magnetic recording / reproducing apparatus according to a second embodiment of the present invention in a state where unloading is completed.

[Explanation of symbols]

10 cassette, 12 magnetic tape, 54 T reel stand, 57 S reel stand, 61 tension arm, 63
... Spring body, 64 ... Tension band, 65, 66 ... Bracket, 69 ... Tension arm.

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5D037 AA03 AB05 AB09 AC09 AC10 BA05 BA12 CA01 DA01 FA06 FA15

Claims (3)

[Claims] 1. A take-up reel base on which a magnetic tape is taken up, a supply reel base on which the magnetic tape is supplied, and a supply reel for applying an appropriate tape tension to the magnetic tape during recording or reproduction. A magnetic tape pulled out of the cassette, comprising: a tension band wound around a table; a tension arm for holding the tension band via a bracket; and a sprocket that generates a tension applied to the magnetic tape by the tension arm. In a magnetic recording / reproducing apparatus that performs recording and reproduction by transferring the magnetic tape wound around a rotary cylinder equipped with a magnetic head at a predetermined angle, the magnetic tape wound around the rotary cylinder is housed in the cassette, Bring the bracket holding the tension band into contact with the projectile A magnetic recording / reproducing apparatus provided with means for tightening the tension band to apply a load to the supply reel base. 2. The apparatus according to claim 1, wherein the means for adding to the supply reel base includes one of two brackets for holding the tension band in a state where the magnetic tape wound around the cylinder is stored in a cassette. A magnetic recording / reproducing apparatus, wherein the tension band is wound up by applying a load to a supply reel table by bringing the tension band into contact with the projection body and the other bracket against the tension arm. 3. A magnetic recording / reproducing apparatus according to claim 1, wherein said projecting body is arranged along a bracket and a tension band.