JPS58130478A - Cassette having z-type guide roller - Google Patents

Abstract

PURPOSE:To wind a tape normally, by cutting the carrying face of a guide roller in a cassette case, at plural positions, at a prescribed angle against the axis, constituting the carrying face in Z-shape, and flapping the tape. CONSTITUTION:A part of a columnar part 10 for forming a carrying face of a guide roller 7 in a cassette case is cut in plural parts, at a prescribed angle against a rotary axis 11, and a Z-shape is formed by a cut face 8. On both ends, a flange 9 is provided so as not to get out a tape from the place, and it is rotated centering around the rotary axis 11. As a result, the tape is wound, receiving a side drop vibration between a reel hub and the guide roller 7. In this way, the tape is wound normally at all times, and generation of static electricity is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cartridge-type cassette with an improved tape transport guide roller.

In conventional cassettes, tape is wound onto left and right reel hubs placed between two upper and lower cassette bars via guide rollers, guide pins, head pads, etc.

゛However, one drawback of conventional cassette chips is that when the tape is wound up, the tape wound around the tape winding body may shift in the vertical direction of the winding body due to various reasons.
There were often so-called irregular windings. As a result, the tape roll comes into contact with the cassette film sheet, cassette half, heel lunge, etc., causing tape squeal and tape elongation.

In addition, as shown in Figure 2, the tape winding may come into contact with the upper lunge in a bowl-like manner, causing tape deformation, tape squeal, and even wow and flutter. there were.

Furthermore, thin tapes such as C-90 and C-120, which are used for long periods of play, have the serious disadvantage of being bent, reversed, or folded due to the effects of static electricity. existed at the time.

The present invention has been made to solve these conventional drawbacks, and aims to improve tape life and acoustic performance by eliminating irregular winding of the tape winding body.

Description will be given below with reference to the accompanying drawings. FIG. 1 is a partially cutaway diagram showing the internal structure of a recently developed cassette. The cassette has a cassette half 1° reel hub 2, 2, 7.
Lunge 3, 3. Guide rollers 4, 4. It consists of a pad 5 and a tape 6.

In the cassette of the present invention, guide rollers (2) and (2) whose tape transport surface has a Z-shaped cross section are installed in place of the conventional guide rollers, as shown in FIGS. 3 and 4.

The Z-type guide roller 1 has upper and lower flanges 9, a substantially cylindrical roller 10, a cut surface 8 having a predetermined angle with respect to the axis,
8 and rotates around the bottle 11.

The effects of the cassette equipped with the type 2 guide roller 7.7 will now be described.

As shown in FIG. 5, the tape 6 is wound around the reel hub 2 via a guide roller 7.7 having an approximately 2-shaped cross section.
At the front where it is wound around the reel hub 2, an inclined cutting surface 8,
8, it is subjected to left and right vibrations in the direction of its movement, and it moves erratically.

Therefore, even if the tape is wound at a low speed as in the conventional method, the air existing between the tape being wound up and the tape winding body is expelled by the above-mentioned tilting motion, so that the tape winding body is It's close to the top, so it won't shift and cause irregular winding.

In other words, by giving disturbance to the tape just before winding υ, the tapes can be tightly wound.

In addition, the Z-type guide roller 7 prevents the generation of static electricity due to irregular tape running due to the sudden change in the diameter of the roller at the cut surface 8. The tape will not be bent or folded due to static electricity.

As described above, the present invention has a simple structure and has great effects.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway view showing the internal structure of a conventional cassette tape, and FIG. 2 is a sectional view of a conventional cassette tape.
FIG. 3 is a front view showing the Z-type guide roller of the present invention, FIG. 4 is a side view thereof, and FIG. 5 is a diagram of the internal structure of a cassette tape equipped with the type-2 guide roller of the present invention. 1...Cassette half, 2...Reel hub, 3...
・Flange, 4... Guide roller, 5... Pad,
6... Tape, 7... Type 2 guide roller, 8...
Notch, 1o... roller, 11... bottle. Patent Applicant Tokuzo Shimizu Agent Patent Attorney Takao Suzuki (5) Procedural Amendment Commissioner Shima 1) Haruki Tono1, Indication of Case Patent Application No. 012149 No. 19882, Title of Invention Z Type Cassette 3 with guide rollers, relationship with the amended case Patent applicant 4, agent 107 Phone number 409-0621 Address 5F Kyodo Building, 5-9-15 Minami-Aoyama, Minato-ku, Tokyo Name (7677) Patent attorney Suzuki Tadao 5
, Date of amendment order 6. Number of inventions increased by amendment None 7. Description and drawings to be amended 8. Contents of amendment As shown in the attached sheet 8. Contents of amendment (1) Brief description of drawings in the description In the explanation column, page 5, line 5, 1..., 8... notch" should be replaced with ", 8...
Corrected to ``cut surface''. (2) Figure 3 of the drawings is corrected as shown in the attached drawings. that's all

Claims (1)

[Claims] The tape transport surface of the guide roller in the cassette is cut at a plurality of angles at a predetermined angle with respect to the axis of the roller, so that the transport surface is configured in a Z-shape so that normal tape winding can be obtained. cassette.