JPH0561837U - Tape guide device - Google Patents

Abstract

(57) [Summary] [Purpose] To shorten the time required for tape loading by continuously moving the pull-out roller that pulls out the tape from the cassette. [Structure] Draw-out arms 23, 25, 26, 30 for tape mounted between a take-up reel and a supply reel of a cassette
In the tape guide device in which the pull-out rollers 19, 20, 21, and 22 provided on the tape guide device wind the pulled-out tape around the drum 11 having the magnetic head by the return roller 15, the pull-out arm 30 is moved to the pull-out roller 22. And a second arm 40 that is swingably attached to the base end of the first arm 41 and has the base end swingably supported by the chassis 10. At the same time, the cam mechanisms 41a and 46 for engaging the first arm 41 and swinging the first arm 41 at a predetermined swing position of the second arm 40.
To provide.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a tape guide device used in a magnetic tape recording / reproducing device such as a video tape recorder (VTR), and more particularly to a tape guide device suitable for a VTR adopting a U loading system.

[0002]

[Prior Art]

 In a VTR adopting the U loading method, a drawer arm is swingably supported between a cassette holder and a drum on a chassis, and a drawer roller is provided at the tip of this drawer arm. At the time of loading, as is well known, the pull-out arm is swung to pull out the tape mounted between the supply reel and the take-up reel of the cassette from the cassette by the pull-out roller, and the tape thus pulled out. Then, pull it out with the return roll and wind it around the drum.

However, in the above-mentioned VTR, it is desired that the tape is largely pulled out from the cassette, so that the pullout arm is lengthened and the VTR as a whole is disadvantageously increased in size. Therefore, a tape guide device in which the pull-out arm is shortened to enable downsizing is proposed in Japanese Patent Laid-Open No. 62-173660.

In this tape guide device, a pull-out arm that supports a pull-out roller that is required to pull out the tape the most is configured as a swing arm type. At the time of loading, the pull-out roller supported by this swing-arm type pull-out arm is pulled down from above the tape after pulling out the tape by another pull-out roller, and further lowered and then the pull-out arm is rocked. I try to pull out the tape.

[0005]

[Problems to be solved by the device]

 However, in the above-described conventional tape guide device, since the pull-out arm has to be lowered from above the tape and then swung, the pull-out arm is required to perform a multi-step operation during loading. There was a problem that this hinders the speeding up of loading. The present invention has been made in view of the above problems, and an object thereof is to provide a tape guide device capable of speeding up loading.

[0006]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention pulls out the tape, which is hooked between the take-up reel and the supply reel of the cassette, from the cassette by the pull-out roller provided on the pull-out arm and In a tape guide device that winds a return roller around a drum having a magnetic head, a first arm that supports the pull-out roller at the front end and a base end of the first arm is swingably attached to the tip. And a second arm whose base end is swingably supported by the chassis. The second arm is engaged with the first arm at a predetermined swing position of the second arm. A cam mechanism that swings the arm is provided.

[0007]

[Action]

 In the tape guide device of the present invention, the second arm swings at the time of loading, and when the second arm swings to a predetermined position, the first arm provided with the pull-out roller swings by the cam mechanism. However, since the first arm and the second arm operate continuously, the loading speed can be increased.

[0008]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. 1 to 4 show a tape guide device according to an embodiment of the present invention. FIG. 1 is a plan view, FIGS. 2 and 3 are plan views in different states from FIG. 1, and FIG. FIG.

In the figure, 11 is a drum having a magnetic head, and the drum 11 is rotatably supported on the chassis 10. Around the drum 11, a voice control head 12, a capstan (not shown), an erasing head 99, and a guide roller 13 are arranged, and the loading ring 14 is eccentrically arranged with respect to the drum 11 to be rotatable. It is provided. The loading ring 14 is provided with a return roller 15, a pinch roller 16, and guide rollers 17 and 18 which are circumferentially separated from each other. Reference numeral 50 denotes an inclined pole that is erected on the chassis 10.

A cassette holder (not shown) is provided on the chassis 10 on the right side of the loading ring 14 in the drawing, and the first tension pole 19 and the first tension pole 19 are provided between the cassette holder and the loading ring 14. The drawing roller 20, the second tension pole 21, and the second drawing roller 22 are arranged. As is well known, a cassette holder is loaded with a video tape cassette, and the tape cassette is loaded with a magnetic tape between a supply reel and a take-up reel. Although not clearly shown in the figure, the tape cassette is loaded in the cassette holder with the supply reel positioned on the lower side in the figure.

The first tension pole 19 is attached to the tip of the first tension arm 23, and the first tension arm 23 feeds the chassis 10 near the lower part of the cassette holder in the figure, that is, the cassette loaded in the cassette holder. It is swingably supported near the reel. Although not described in detail, the first tension arm 23 engages with the slide plate 24 and is biased by a spring. At the time of loading, the first tension arm 23 is driven by a loading motor via a slide plate 24 and swings counterclockwise in the drawing, and the first tension pole 19 pulls out the tape from the cassette. The first tension arm 23 brings the first tension pole 19 into contact with the tape at the time of recording and reproducing, and swings against the elastic force of the spring to adjust the tape tension.

The first pull-out roller 20 is provided at the tip of the first pull-out arm 25, and the first pull-out arm 25 is swingably supported between the drum 11 and the loading ring 14. A sector gear 25a is formed on the first extraction arm 25, and the sector gear 25a meshes with a gear 24a formed on the slide plate 24. The first pull-out arm 25 swings by the movement of the slide plate 24 during loading, and the first pull-out roller 20 pulls out the tape from the cassette.

The second tension pole 21 is provided at the tip of the second tension arm 26, and the second tension arm 26 is located near the upper part of the cassette holder in the figure, that is, the take-up reel of the cassette loaded in the cassette holder. It is swingably supported in the vicinity. The second tension arm 26 is connected to the base member 31 by a torsion spring 32, and one end of the link member 27 is connected to the base member 31.

The second tension arm 26 is driven by a link member 27 or the like to swing during loading, and the swing of the second tension arm 26 causes the second tension pole 21 to move from the inside of the cassette to the tape. Pull out. Then, like the first tension arm 23, the second tension arm 26 causes the second tension pole 21 to come into contact with the tape at the time of recording and reproduction to resist the elastic force of the spring. Swing to adjust tape tension.

The link member 27 has a long hole 27a formed at the other end, and the pin 28a planted in the lever member 28 is inserted into the long hole 27a. The lever member 28 is rotatably supported at its center by a support shaft 44 provided upright on the chassis 10, and has the above-mentioned pin 28 at one end and a sector gear 28b at the other end. In this lever member 28, the sector gear 28b meshes with the first drive gear 29, and swings by the rotation of the first drive gear 29 to drive the second tension arm 26 via the link member 27.

The second pull-out roller 22 is provided on the second pull-out arm 30, and the second pull-out arm 30 is swingably supported near the upper side of the second tension arm 26 in the drawing. In the second pull-out arm 22, an intermediate arm (first arm) 41 is attached to the tip of a main body arm (second arm) 40, and the pull-out roller 22 is supported by an inclined arm 42 attached to the intermediate arm 41. To do.

The main body arm 40 is rotatably supported integrally with the lever member 28 at the base end by the support shaft 44 described above, and has a support shaft 43 provided at the front end in the vertical direction perpendicular to the paper surface of the intermediate arm. 41 is swingably supported around a support shaft 43. The body arm 40 is connected to the loading motor via the lever member 28 and the first drive gear 29, and swings integrally with the lever member 28.

The intermediate arm 41 extends in the horizontal direction, the intermediate portion is supported by the support shaft 43, the cam groove 41 a engageable with the cam pin 46 is formed at one end, and the other end is provided in the horizontal direction. The tilt arm 42 is swingably supported around the support shaft 45 by the support shaft 45 provided in the. A spring (not shown) is provided between the intermediate arm 41 and the main body arm 40, and the intermediate arm 41 is biased counterclockwise in the figure by the spring.

The cam pin 46 is disposed above the loading ring 14 on the chassis 10 with the support shaft 44 as the center, at a position substantially equidistant from the support shaft 44 with the cam groove 41a. The cam pin 46 is engaged with the cam groove 41a of the intermediate arm 41 that moves by swinging the main body arm 40 in the clockwise direction. The cam pin 46 and the cam groove 41a form a cam mechanism. The intermediate arm 41 is entirely moved by swinging of the main body arm 40, and when the cam pin 46 is engaged with the cam groove 41a, the intermediate arm 41 swings clockwise around the support shaft 43 along the shape of the cam groove 41a.

The tilt arm 42 has an intermediate portion supported by the above-described support shaft 45, one end provided with the second drawer roller 22, and the other end abutting the stopper portion 41 b at the tip of the intermediate arm 41. A stopper portion 42a is formed. One end of the support shaft 45 projects so as to be able to come into contact with a stopper 49 described later, and a torsion spring 48 is provided between the tilt arm 42 and the intermediate arm 41. The spring 48 urges the inclined arm 42 in a direction in which the stopper portion 42a abuts the stopper portion 41b. The tilt arm 42 moves by the swing of the main body arm 40 and the swing of the intermediate arm 41, and the second pull-out roller is at the position where these arms 40, 41 swing most clockwise (see FIG. 3). The upper flange of 22 contacts the stopper 49 and swings around the support shaft 45 by a predetermined angle. Then, the second pull-out roller 22 is tilted at a predetermined angle while being in contact with the stopper 49.

The stopper 49 is arranged on the upper left side of the loading ring 14 in the figure, in close proximity to the inclined pole 50. As shown in FIG. 4, the stopper member 49 has a flange-shaped contact member 49a fixed to the upper end, and a V-shaped contact portion 49b formed at the lower end. The contact member 49a contacts the upper end of the second pull-out roller 22, and the support shaft 45 contacts the contact portion 49b.

The first drive gear 29 described above is supported by the main gear 60 and the second drive gear 61 above the loading ring 14 so as to be rotatable as a unit. The main gear 60 is connected to a loading motor via a gear train (not shown), and the second drive gear 61 is engaged with a sector gear 62a integrally provided with a drive arm 62. The tip of the drive arm 62 is connected to the slide plate 24, and the rotation of the drive gear 61 drives the slide plate 24 up and down in the drawing. As described above, the tension arm 23 and the first pullout arm 25 are engaged with the slide plate 24, and the arms 23, 25 swing by the movement of the slide plate 24.

In such a tape guide device, the tape cassette is loaded in the cassette holder with the supply reel positioned below in the drawing. Before loading, such as when loading a cassette, as shown in FIG. 1, the tension poles 19 and 21 and the pull-out rollers 20 and 22 are positioned in the notches at the bottom of the cassette to prepare for loading.

Here, when loading is started, the tension arm 23 swings counterclockwise, and the pull-out arms 25 and 30 and the tension arm 26 swing clockwise, and as shown in FIG. The tape is pulled out from the cassette by the rollers 19 and 21 and the respective pulling rollers 20 and 22. Then, at this time, in the second pull-out arm 22, the cam groove 41 a of the intermediate arm 41 contacts the cam pin 46.

Subsequently, only the second pull-out arm 22 further swings, the intermediate arm 41 rotates clockwise by the cam pin 46 sliding in the cam groove 41a, and the second pull-out roller 22 stops. It abuts the member 49 (see FIG. 3). Then, the tilting arm 42 is rocked by the subsequent rocking of the intermediate arm 41, and the second pull-out roller 22 is tilted as shown in FIGS. 3 and 4.

After that, as is well known, the loading ring 14 rotates, and the tape is wound on the drum 11 obliquely by the return roller 15 or the like.

As described above, in this embodiment, in the second pull-out arm 22, the main body arm 40, the intermediate arm 41 and the tilt arm 42 are successively swung to pull out the tape by the pull-out roller 22. Therefore, the time required for loading can be shortened.

In the above-mentioned embodiment, the U loading method is adopted, but the present invention can be applied to various methods such as M loading method. Further, in the above embodiment, the pull-out roller for pulling out the tape from the cassette is composed of the two tension poles 18 and 21 and the two pull-out rollers 20 and 21, but, for example, all of them also serve as tension poles. Alternatively, the pull-out roller may be simply used and a tension pole may be separately provided.

[0029]

[Effect of the device]

 As described above, according to the tape guide device of the present invention, the pulling-out arm provided with the pulling-out roller is configured by swingably connecting a plurality of arms, and these arms are sequentially and continuously swung. Since the tape is pulled out with the pull-out roller by moving it, the tape can be loaded quickly.

[Brief description of drawings]

FIG. 1 is a plan view of a tape guide device according to an embodiment of the present invention.

FIG. 2 is a plan view of the tape guide device in a state different from that of FIG.

FIG. 3 is a plan view of the tape guide device in a state different from FIGS. 1 and 2.

FIG. 4 is a view on arrow A in FIG.

[Explanation of symbols]

10 ... chassis, 11 ... drum, 19, 21 ...
..Tension rollers, 20, 22 ... Drawing rollers,
23, 26 ... Tension arm, 25, 30 ...
Drawer arm, 40 ... Main body arm (second arm),
41 ... Intermediate arm (first arm), 41a ...
Cam groove (cam mechanism), 42 ... Inclined arm, 43, 4
4, 45 ... Support shaft, 46 ... Cam pin (cam mechanism).

Claims (1)

[Scope of utility model registration request] 1. A drum having a magnetic head, wherein a tape mounted between a take-up reel and a supply reel of the cassette is pulled out from the cassette by a pull-out roller provided on a pull-out arm, and the pulled-out tape is returned by a return roller. A tape guide device that winds around the first arm, the first arm supporting the drawer arm at the tip of the drawer roller;
And a second arm having a base end of the first arm swingably attached to the tip end and a base end swingably supported by the chassis. A tape guide device comprising a cam mechanism which engages with the first arm and swings the first arm at a predetermined swing position.