JPH04252455A - Tape loading device for magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To eliminate play in a direction perpendicular to the circumferential plane of a loading ring by abutting a height decision pin studded on the lower plane of the loading ring with a height regulation member when tape loading is completed. CONSTITUTION:The loading ring 1 is turned in a direction of arrow head A, and a stopper pin 5 and the height decision pin 14 provided on the lover plane of the ring 1 are also turned with the ring 1. When the ring 1 is further turned and tape guide posts 2, 3 on the ring 1 form a prescribed tape pass for a magnetic tape 11 and the tape arrives at a tape loading completion position, the stopper pin 5 turns a loading completion lever 6, and a loading completion switch 8 is turned on, which stops the turning driving of the ring 1. Simultaneously, the pin 5 is abutted with a stopper 9, and the rotation of the ring 1 is stopped, then, the tape loading is completed. At this time, the play in the direction perpendicular to the circumferential plane of the ring 1 can be eliminated and it is fixed by abutting the height decision pin 14 with the height regulation member 15.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mechanism for positioning a loading ring at the completion of a tape loading operation in a video tape recorder.

0002

[Prior Art] A magnetic recording and reproducing device that performs recording and reproducing by pulling out a magnetic tape from a tape cassette and winding it around a rotating drum having a magnetic head uses a so-called loading method in which the magnetic tape is pulled out and wound around a rotating drum. There are various methods for this, and one of the most representative methods is called the U loading method. The feature of this U-loading method is that the tape is wound around a rotating drum in a roughly U-shape.
The magnetic tape is prevented from being twisted or changed in height up to the magnetic tape entry point of the rotating drum.

The loading method of the conventional magnetic recording/reproducing apparatus as described above will be explained below with reference to FIG.

In FIG. 5, reference numeral 1 denotes a loading ring, and has a plurality of tape guide posts 2, 3 and a pinch roller 4 set up on its upper surface. The loading ring 1 is guided and supported by ring rollers 13, and is tilted around a rotating drum (not shown), and is driven in the direction of arrow A by a driving means (not shown) that drives the loading ring 1. It can be rotated.

As shown in FIG. 6(a), 5 is a stopper pin installed on the lower surface of the loading ring 1.
The loading ring 1 comes into contact with the stopper 9 at the loading completion position shown in FIG. The stopper 9 is shown in Fig. 6(a).
), it is fixed to the substrate 20. 6 shown in FIG. 5 is a loading completion lever, which rotates around a shaft 7.
It comes into contact with the stopper pin 5 during the loading, and when the tape loading is completed, the loading completion switch 8 is turned on and the rotation of the loading ring 1 is stopped. 1
0 is a capstan that comes into contact with the pinch roller 4 and presses the magnetic tape 11 interposed between the pinch roller 4 and the pinch roller 4.
give a feed to A pinch roller arm 12 supports the pinch roller 4, and is supported by the loading ring 1 through a shaft 12a. The tape loading operation of the magnetic recording/reproducing apparatus configured as above will be explained.

First, the magnetic tape 11 is pulled out by the tape guide posts 2, 3, etc. as the loading ring 1 rotates in the direction of arrow A. When the loading ring 1 rotates to a predetermined position and tape loading is completed, the magnetic tape 11 forms a predetermined tape path.

At this time, the completion of tape loading is determined by the stopper pin 5 on the lower surface of the loading ring 1 rotating with the rotation of the loading ring 1 and coming into contact with the stopper 9, as shown in FIG. At this time, the loading completion lever 6 is rotated by coming into contact with the stopper pin 5, and when the loading completion switch 8 is turned on, the rotation of the loading ring 1 is stopped and tape loading is completed.

[0008]

However, in such positioning for completion of tape loading, the structure of the stopper pin 5 and the stopper 9 at the completion position prevents play in the height direction between the ring roller 13 and the loading ring 1. The height of the loading ring 1 upon completion of tape loading changes slightly each time the tape is loaded. In addition, when trying to adjust the height of the guide posts 2 and 3 that regulate the running height of the tape, when force is applied to the top surface of the loading ring 1, the loading ring 1 itself bends in the vertical direction, making the guide posts 2 and 3 delicate. It is not possible to adjust the height of the tape, and as a result, the running height of the tape becomes unstable, causing problems such as tape damage and loss of compatibility. The present invention is intended to solve such conventional problems, and provides a magnetic recording and reproducing device that can reliably and highly accurately determine the height of the loading ring 1 when tape loading is completed with a simple configuration. The present invention provides a tape loading device.

[0009]

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a magnetic recording and reproducing device that performs recording and reproducing by winding a magnetic tape around a rotating head having a magnetic head, in which the magnetic tape is guided. a loading ring having a tape guide means consisting of a guide post and a pinch roller planted on its upper surface; a ring roller mounted on a substrate and rotatably guiding the loading ring around the rotating head; A stopper pin and a height determining pin planted on the lower surface of the ring, a stopper fixed to the substrate so as to be able to come into contact with the stopper pin, and a height regulating member fixed to the substrate so as to be able to come into contact with the height determining pin. and when the loading ring rotates around the rotary head and the tape guide means completes the winding operation of winding the magnetic tape around the rotary head, the stopper pin connects to the stopper. The loading ring is positioned in the circumferential direction by making contact with the height regulating member, and the loading ring is positioned in the vertical direction by making contact with the height regulating member.

Further, the present invention provides a V-shaped groove on the outer periphery of the ring roller, and the V-shaped groove abuts and guides the edge of the loading ring, thereby positioning the loading ring in the vertical direction during rotation. This is how it was done.

Further, in the present invention, a groove is provided on the side surface of the height determining member, and a convex portion that can fit into the groove is provided at the tip of the height determining pin, so that the winding movement around the rotating head of the loading ring is controlled. At the final point, the protrusion fits into the groove to position the loading ring in the vertical direction.

0012

[Operation] In the present invention, in the above-described configuration, the axial wobbling of the loading ring 1 and the ring roller 13 is absorbed by the height determining pin provided on the lower surface of the loading ring and the height regulating member coming into contact with each other. Ensure the height of loading ring 1 when tape loading is completed.
This can be determined with high precision.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view showing the configuration of a loading device of a magnetic recording/reproducing apparatus according to an embodiment of the present invention, and FIG. 2(a) is a side view taken along arrow line M-M in FIG.
FIG. 2(b) is a sectional view taken along the arrow line NN in FIG. Components that are the same as those in the conventional example are given the same numbers, so explanations will be omitted. As shown in the figure, the characteristic configuration of this embodiment is that a height determining pin 14 is installed on the lower surface of the loading ring 1, and a height regulating member 15 is also provided, so that the height determining pin 14 is set to the height when tape loading is completed. It is arranged so as to come into contact with the regulating member 15.

The operation of this embodiment configured as described above will be explained below. First, loading ring 1 rotates in the direction of arrow A, and loading ring 1
Stopper pin 5 and height determining pin 1 provided on the bottom surface of
4 also rotates together with the loading ring 1. As the rotation of the loading ring 1 progresses and the tape guide posts 2 and 3 on the loading ring 1 form a predetermined tape path for the magnetic tape 11 and reach the tape loading completion position shown in FIG. The loading completion lever 6 is rotated, the loading completion switch 8 is turned on, and the rotational driving force of the loading ring 1 is cut off. At this time, the stopper pin 5 simultaneously contacts the stopper 9 to stop the rotation of the loading ring 1, completing tape loading.

At this time, the height determining pin 14 abuts against the height regulating member 15, so that the loading ring 1 is fixed without play in the direction perpendicular to the circumferential surface of the loading ring.

As described above, according to this embodiment, the height determining pin 14 is provided on the lower surface of the loading ring 1, and the height determining pin 14 comes into contact with the height regulating member 15, so that
The looseness in the direction perpendicular to the circumferential surface of the loading ring 1 due to the looseness between the loading ring 1 and the ring roller 13 is eliminated.

[0017] It goes without saying that the height determining pin is more effective if it is located on the lower surface near the leading post on the loading ring, where subtle changes in post height have a large effect on running.

Regarding other embodiments of the present invention, FIGS.
This will be explained with reference to FIGS. 4(a) and 4(b). Figure 3
4(a) is a plan view showing the configuration of a loading device of a magnetic recording/reproducing apparatus according to another embodiment of the present invention, FIG. 4(a) is a side view taken along the arrow line XX in FIG. It is a sectional view taken along arrow line YY. In these figures, the same parts as in the conventional example are given the same numbers, so
Explanation will be omitted.

The ring roller 13a that guides and supports the loading ring 1 in FIG. 3 has a V-shaped groove 13b on the side surface, as shown in detail in FIG. 4(b).
3b guides and supports the loading ring 1. Therefore, the ring roller 1 shown in FIG. 6(b) of the conventional example
The vertical play between Loading 1 and Loading 1 is eliminated. Furthermore, in this embodiment, the height determining pin 14a is
b, and the height regulating member 15a has a groove portion 15b. As a result, when loading is completed, the
), since the convex portion 14b can fit into the groove portion 15b, it is possible to prevent the loading ring 1 from shaking in the vertical direction.

[0020]

As is clear from the above description of the embodiments, according to the present invention, when tape loading is completed, the height fixing pin installed on the lower surface of the loading ring comes into contact with the height regulating member, which is different from the conventional method. The looseness in the direction perpendicular to the circumferential surface of the loading ring due to the looseness between the loading ring and the ring roller is eliminated. For this reason,
Tape running is stabilized, tape damage is reduced, and the height of the guide post can be finely adjusted.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a loading device of a magnetic recording/reproducing device according to an embodiment of the present invention.

[Fig. 2] (a) Side view along arrow line M-M in Fig. 1 (b)
) Cross-sectional view taken along arrow line N-N in Figure 1

FIG. 3 is a plan view of a loading device of a magnetic recording/reproducing device according to another embodiment of the present invention.

[Fig. 4] (a) Side view along arrow line XX in Fig. 3 (b)
) Cross-sectional view along arrow line Y-Y in Figure 3

[Fig. 5] A plan view of a loading device of a conventional magnetic recording/reproducing device.

[Fig. 6] (a) Side view taken along arrow line S-S in Fig. 5 (b)
) Cross-sectional view taken along the arrow line T-T in Figure 5

[Explanation of symbols]

1 Loading ring 2 Guide post 3 Guide post 4 Pinch roller 5 Stopper pin 9 Stopper 13 Ring roller 13a Ring roller 13b V-shaped groove 14 Height determining pin 14a Height determining pin 14b Convex part 15 Height regulating member 15a Height regulation member 15b Groove 20　Substrate

Claims (3)

[Claims] 1. A magnetic recording and reproducing device that records and reproduces information by winding a magnetic tape around a rotating head having a magnetic head, wherein a tape guide means consisting of a guide post and a pinch roller for guiding the magnetic tape is provided on the top surface. a loading ring planted on a substrate, a ring roller that rotatably guides the loading ring around the rotating head, a stopper pin and a height determining pin planted on the lower surface of the loading ring; a stopper fixed to the substrate so as to be able to come into contact with the stopper pin; and a height regulating member fixed to the substrate so as to be able to come into contact with the height determining pin; When the winding operation of rotating and winding the magnetic tape around the rotary head by the tape guide means is completed, the stopper pin contacts the stopper to position the loading ring in the circumferential direction. . A tape loading device for a magnetic recording/reproducing device, wherein the height determining pin abuts against the height regulating member to position the loading ring in the vertical direction. 2. A V-shaped groove is provided on the outer periphery of the ring roller, and the V-shaped groove abuts and guides the edge of the loading ring, thereby positioning the loading ring in the vertical direction during rotation. A tape loading device for a magnetic recording/reproducing device according to claim 1. 3. A groove is provided on the side surface of the height regulating member, and a protrusion that can fit into the groove is provided at the tip of the height determining pin, so that when the winding operation around the rotating head of the loading ring is completed. 2. A tape loading device for a magnetic recording/reproducing device according to claim 1, wherein said convex portion fits into said groove portion to position said loading ring in a vertical direction.