JPH04321966A - tape guide mechanism - Google Patents

Abstract

PURPOSE:To smoothly perform the guiding of a magnetic tape and other tape and to make the equipment such as a magnetic recording and reproducing device mounting the guiding mechanism thinner. CONSTITUTION:A tape travelling guide 12 is erected at a tape travelling channel and in the travelling channel, guides a magnetic tape 18. The tape travelling guide 12 regulates the position of the magnetic tape 18 in the width direction between flanges 32 and 34 at the upper and lower tips of a sleeve 28. A tape fitting guide 22 guides the magnetic tape 18 through a lower flange 34 to the outer surface of the sleeve 28 at the time of loading the magnetic tape 18 and has a spring characteristic to press the tape travelling guide 12 upwards in the above-mentioned width direction at the arrangement position.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tape guiding mechanism for guiding a magnetic tape or other tape along a predetermined tape running path in a device such as a video tape recorder that loads a tape onto a predetermined tape running path.

0002

2. Description of the Related Art FIG. 2 is a schematic plan view of the inside of a video tape recorder as an example of a magnetic recording/reproducing device.
2 is a cassette tape, 4 and 6 are reels in the cassette tape 2, 8 is a rotating head drum, 10 is a magnetic head, 12
14 is a tape running guide, 14 is a pinch roller, 16 is a capstan shaft, and 18 is a magnetic tape, and the state shown in the figure shows the state in which the magnetic tape 18 is loaded onto the rotary head drum 8.

FIG. 3 is a partially cutaway front view of a conventional tape guide mechanism including a tape running guide 12. Equipped with The tape running guide 12 has a shaft 26, a sleeve 28, and a nut 30. The sleeve 28 has flanges 32 and 34 at its upper and lower ends.

In this tape guide mechanism, the lower end of the shaft 26 is fixed to a base 36, and the tape installation guide 22, the spring 24, and the sleeve 2 are attached to the shaft 26 in the fixed state.
8 are respectively inserted, they are tightened with nuts 30 and set upright on the base 36, and the end 22a of the tape installation guide 22 is fitted into the hole of the base 36 without being movable. .

The magnetic tape 18 is guided to the sleeve 28 via the slope 22b of the tape mounting guide 22 and the lower flange 34. The widthwise position of the magnetic tape 18 is regulated by both flanges 32 and 34, and the height position from the base 36 is adjusted by the tightening height of the nut 30 against the bias of the spring 24. It looks like this.

[0006]

In the tape guide mechanism having the above structure, the height of the magnetic tape 18 from the surface of the base 36 is adjusted by tightening the nut 30. 3, from the apex a of the slope 22b of the tape installation guide 22, the sleeve 28
The widthwise distance d to the lower flange 34 forming point b changes.

If this distance d is too long, when the magnetic tape 18 is guided from the slope 22b of the tape mounting guide 22 to the outer surface of the sleeve 28, the magnetic tape 18 will not touch the lower flange 34.
or the lower flange 3
In short, it becomes difficult to smoothly guide the magnetic tape 18 to the sleeve 28 side, and if it is too short, problems such as the magnetic tape 18 slipping into the lower side of the sleeve 28 occur. There is a problem in that the magnetic tape 18 collides with the sleeve 28 during guiding, which may cause problems such as damage to the magnetic tape 18.

Another problem was that since the spring 24 increases the vertical dimension L of the base 36 of the magnetic tape guide mechanism, it becomes difficult to make the video tape recorder thinner in this direction. .

Therefore, in the present invention, it is possible to smoothly guide such a magnetic tape or other tape, and it is possible to reduce the thickness of equipment such as a magnetic recording/reproducing device equipped with the guide mechanism. The purpose is to do so.

0010

[Means for Solving the Problems] In order to achieve the above object, the tape guide mechanism of the present invention is applied to a device that pulls out a tape from a cassette and loads it onto a predetermined tape running path. The tape running guide has a tape running guide and a tape mounting guide, and the tape running guide is installed upright on a tape running path to guide the tape within the running path, and has a flange. The flange regulates the position of the tape in its width direction, and the tape mounting guide is disposed below the tape running guide to guide the tape to the flange when loading the tape, and also to guide the tape running guide at the deployment position. It is characterized by having a spring property that urges upward in the width direction.

Note that the term "tape" mentioned in the above-mentioned claims should be interpreted as a broad concept that includes not only tapes such as magnetic tapes, but also so-called tape-shaped bodies similar to tapes.

0012

[Operation] During tape loading, the tape is guided by the tape mounting guide to the flange of the tape running guide. And when loading,
The tape mounting guide urges the tape running guide upward in the width direction from a position provided below the tape running guide.

[0013]

Embodiments Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a partially cutaway front view of a tape guide mechanism according to an embodiment of the present invention, and FIG. 3 is a front view of a conventional example.
The same reference numerals are given to the parts corresponding to the parts shown in , and detailed explanations of the parts and parts corresponding to the same reference numerals will be omitted.

The tape guide mechanism of this embodiment will be explained as being applied to guide the magnetic tape of the video tape recorder shown in FIG. 2 as an example, but it may be applied to other types of tape other than magnetic tape, The present invention can be similarly applied to a mechanism for guiding a tape-like object similar to a tape.

The feature of this embodiment is that the spring 2 of the conventional example is
4 is not provided, and tape installation guide 2 is not provided.
The sleeve 2 has the shape shown in the figure and is disposed at the lower part of the tape running guide 12, and serves as a running guide surface for the tape to pass through the lower flange 38 when loading the magnetic tape.
The tape running guide 12 is adapted to be guided to the outer surface of the magnetic tape 8, and has a spring property that biases the tape running guide 12 upward in the width direction of the magnetic tape at the deployment position.

The tape installation guide 22 has a truncated cone shape, and is provided with a rotation stopper 38 provided on the base 36.
The lower end portion 22a engages with the lower end portion 22a, the slope portion 22b serves as a guide surface for mounting the magnetic tape, and the top surface 22c thereof serves as a mounting surface for the lower flange 34.

In such a tape guide mechanism, when loading a magnetic tape, the magnetic tape is guided from the slope portion 22b of the tape mounting guide 22, and is guided from the lower flange 34 of the tape running guide 12 to the outer surface of the sleeve 28, which is the tape running surface. It will be done. The magnetic tape guided to the outer surface of the sleeve 28 is regulated in its widthwise position by both flanges 32 and 34, and its guiding height is regulated by adjusting the tightening of the nut 30. When the sleeve 28 is moved up and down to adjust the height of the guide during tightening, since the tape installation guide 22 has a spring property, the sleeve 28 is constantly urged upward, and as a result, the height is adjusted. There is no wobbling in the position.

What is important is that when adjusting the height of the magnetic tape 18 from the surface of the base 36 by tightening the nut 30, as shown in FIG. , the distance d in the width direction from the forming point b of the lower flange 34 of the sleeve 28 does not change. This is because the lower flange 34 is placed on the top surface 22c of the tape installation guide 22, and the top surface 22c
This is because the lower flange 34 is always urged upward from c, and the tape running guide 12 and tape mounting guide 22 move integrally. Therefore, since there is no variation in this distance d, the magnetic tape 18 may get caught on the lower flange 34 due to its length variation, or the magnetic tape 18 may slip into the gap between the lower flange 34 and the tape mounting guide 22. Alternatively, collision of the magnetic tape 18 with the sleeve 28 is eliminated.

Furthermore, since the conventional spring 24 is eliminated, the height L of the tape guide mechanism can be reduced, and as a result, the device equipped with this tape guide mechanism can be made thinner.

[0021]

[Effect of the invention] As is clear from the above explanation,
According to the present invention, during tape loading, the tape is guided by the tape mounting guide to the flange of the tape running guide, and during loading, the tape mounting guide is moved to a position provided below the tape running guide. Since the tape running guide is biased upward in the width direction, even if the height of the tape running guide is adjusted, the distance between the tape installation guide and the flange does not change, and therefore the distance does not change. This eliminates the problem of obstruction or damage to the tape guidance that occurs in the past, and allows the tape to be guided smoothly. Since the guide mechanism is used as a substitute, the spring can be omitted, and as a result, equipment such as a magnetic recording/reproducing device equipped with the guide mechanism can be made thinner.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway front view of a tape guide mechanism according to an embodiment of the present invention.

FIG. 2 is a schematic plan view of the inside of the video tape recorder for explaining tape loading of the video tape recorder.

FIG. 3 is a partially cutaway front view of a tape guide mechanism according to a conventional example.

[Explanation of symbols]

12 Tape running guide 22 Tape installation guide 26 Shaft 28 Sleeve 30 Nut 32 Upper flange 34 Lower flange 36 Base

Claims (1)

[Claims] 1. Applicable to a device for loading a tape onto a predetermined tape running path, the device having a tape running guide (12) and a tape mounting guide (22),
The tape running guide (12) is installed upright on the tape running path and guides the tape within the running path,
A flange (34) is provided, the flange (34)
is for regulating the position of the tape in its width direction, and a tape mounting guide (22) is provided at the bottom of the tape running guide (12) to guide the tape to the flange (34) when loading the tape. A tape guide mechanism characterized in that it has a spring property that biases the tape running guide (12) upward in the width direction at the deployment position.