JPS6098557A - Magnetic tape guiding device - Google Patents

Abstract

PURPOSE:To reduce the total tape winding angle to inclined guide post only by selecting the directions and angles of these inclinded guide posts and to obtain a magnetic tape guiding device reduced at its frictional load by arranging an inclinded guide post group consisting of plural inclined guide posts between a guide post on the tape loading side near a drum and the drum symmetically to the other inclinded guide post arranged between the drum and a guide post on the tape unloading side. CONSTITUTION:Plural, e.g. a pair of, inclined guide posts 19, 20 are arranged between the guide post 8 on the tape loading side and the drum 10 and plural, e.g. a pair of, inclined guide posts 21, 22 are arranged between the drum 10 and the guide post 12 on the tape unloading side symmetrically to said tape loading side guide posts. Namely, prescribed tape 3 loading and winding angles to/around the drum 10 are obtained by the inclined guide posts 19, 20 and 21, 22 and these guide posts are inclined in the prescribed directions by the prescribed angles so that the tape 3 is stably travelled without twist. Thus, the total tape winding angle to the inclined guide posts 19, 20 can be reduced.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] This invention relates to a magnetic tape (hereinafter simply referred to as tape).
A helical skin type video tape recorder (hereinafter referred to as VTR) that uses a rotating head system as a recording medium.
The present invention relates to a magnetic tape guide device applied to.

[Prior art]

FIG. 1t shows the configuration of a conventional magnetic tape guide device 1t. As shown in the figure, the tape (3) fed out from the supply reel (2) of the cassette (1) is held perpendicular to the reference plane c (hereinafter simply referred to as the reference plane) for mounting the cassette. Along arrow a? While holding the guide post (4), tension regulator (5),
Enter the guide boss (6), FE head (7) and (9). After wrapping around the inclined guide post (9) at a predetermined angle, the drum
C enters at a predetermined angle along a helical lead on the drum (10). Tape 1181+ wrapped around drum 11.01 by more than 180″ is
Then, the inclined guide boss is inclined at a predetermined angle in a predetermined direction with respect to the reference plane.
It is returned to the height of +21. Thereafter, the tape (3) is held perpendicularly to the reference plane (guide boss) (12
), A10 head 03), guide post flJ % kitchen bustan shaft (5), pinch roller (IQ) and guide post (17) attached to the winding wheel 08) &
It's here. During this time, the tape (3) runs stably without twisting.

The advantage of this magnetic tape guide device is that all tape guides other than the drum (10) and the inclined guide boss (191, +l]) can be configured perpendicular to the reference plane, which is advantageous for making the VTR thinner. be. However, on the other hand, the tape (3) drum + IO) G, : predetermined approach angle and σ winding (to obtain the I angle, the inclined guide boss) t9), o]) )
The disadvantage of winding is that the corners are quite large. Because the tape (3) enters diagonally relative to the inclined guide boss) +91 and 1111, it is not possible to use a roller structure.
The larger the angle of the wrap, the greater the frictional load, which may cause an increase in drive torque and adverse effects on the tape (3).

Note that this inclined guide post (9) and 01)
The winding of tape (3) on the drum (10) increases as the corner increases.
Increase JJI+.

[Summary of the invention]

This invention has an advantage in making the VTR thinner by providing a set of inclined guide posts between the vertical guide balls on the tape entry and exit sides near the drum and the drum. In addition to being able to maintain
Furthermore, it is possible to reduce the angles in the total winding of the tape around the inclined guide post, thereby providing a magnetic tape guide device that can ensure smooth tape running.
It has been the target.

[Embodiments of the invention]

FIG. 2 shows an example of the magnetic tape guide sound 1iT according to the present invention, and the same parts as in FIG. A feature of the configuration of this magnetic tape guide device is that a pair of inclined guide bosses (m) and (20) are arranged between the guide boss (8) and the drum +10) on the tape entry side. (See Figure 6)
, Also, between the drum (10) and the guide post on the tape exit side, a plurality of pieces, for example, a pair of inclined guide posts →,
122 is arranged symmetrically with that on the tape entry side (FIG. 4).

That is, the inclined guide boss) (19), (a) and G! υ.

) is set at a predetermined approach angle and wrapping of the tape (3) with respect to the drum (10) at a predetermined angle in a predetermined direction so that an angle is obtained and the tape (3) runs stably without twisting. If the brass is made oblique, the total winding of the tape (3) around these oblique guide posts (lo) to (0) can be avoided from reducing the corners.

In addition, in the above example, the inclined guide boss) (+9) to (
Although the explanation has been given using a one-to-one pair as an example, the number of pairs is not limited to one, and it is also possible to further increase the number to one pair.

〔Effect of the invention〕

As described above, in this invention, inclined guide posts each having a set of several mirrors are arranged symmetrically between the guide posts on the tape entry side and the tape exit side near the drum and the drum. By simply selecting the direction and angle of the tape, the total winding of the tape around the inclined guide post can reduce the angle, which has the effect of providing a magnetic tape guide device with a small frictional load.

[Brief explanation of the drawing]

FIG. 1 is a schematic plan view showing a conventional magnetic tape guide device, FIG. 2 is a schematic plan view showing an example of a magnetic tape guide device according to the present invention, and FIGS. 6 and 4 respectively show an inclined guide post. It is a side view which shows the first child of an eclipse. (1)...Cassette, (3)...Magnetic tape, +
8), t+2)...Guide boss, (19),
(a), eυ, e9... Inclined guy 1゛bost, (top/
··drum. In addition, in the figures, the same reference numerals are the same or (■ indicates the white part. Agent Masashi Oiwa Figure 3 Figure 4 Procedural amendment (voluntary) Mr. Commissioner of the Japan Patent Office 1, Indication of the case Patent application No. 58-206525 2, title of the invention (G-stape guide device 3, name of the person making the amendment (601) Mitsubishi Electric Corporation Representative Hitoshi Katayama 1, agent address 2 Marunouchi, Chiyoda-ku, Tokyo) +12 No. 3 Within Mitsubishi Electric Corporation/'' Go to -15, Root 1゜6 of the "Detailed Description of the Invention" of the specification subject to amendment, Contents of supplementary IF (1) The specification is amended as follows. .

Claims (1)

[Claims] (J) When installing a cassette, the magnetic tape is wound around a drum that is installed at a predetermined angle with respect to a reference surface, and the magnetic tape is wound around the drum at a predetermined angle with a helical force. , each guide post located on the magnetic tape entry side and the tape exit side near the drum and held perpendicular to the cassette reference plane and the totem) - (D Iil c, the above J old standard plane G On the other hand, a magnetic tape guide device 1 is characterized in that a set of inclined guide posts each having a plurality of inclined guide posts inclined in a predetermined direction at a predetermined angle are arranged symmetrically.