JPH046683A - Tape cassette - Google Patents

Abstract

PURPOSE:To remove the turbulence of tape traveling in a cassette, to reduce tape damage and to attain stable recording/reproducing by arranging tape width direction position regulating ribs for regulating a tape at two positions so as to be opposed and projected to upper and lower cases. CONSTITUTION:The tape width direction position regulating ribs 6, 7 for regulating the tape 2 at two positions around a guide pole 4 and a guide roller 5 are annularly or approximately semi-circularly opposed and projected to the upper and lower cases 11, 12. Namely curved top parts, i.e. tape contact parts, coming into contact with the tape 2 are formed on the ribs 6, 7 having circular arc-like cross sections and annularly or approximately semicircularly arranged around the guide pole 4 and the guide roller 5 so as to regulate the tape 2 in a well-balanced state at least at plural positions. Consequently, the tape traveling in the cassette can be smoothly and stably executed without generating turbulence, the damage of a tape edge can be reduced and stable recording/ reproducing can be attained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a tape cassette containing a tape such as an audio or video magnetic tape or a cleaner tape.

[Conventional technology]

Conventionally, magnetic tapes such as audio and video tapes are wound around a pair of reel hubs and rotatably mounted and stored inside a cassette case. In order to improve the running performance, there are position regulating ribs protruding from the inner surface of the case in the width direction of the tape.
Alternatively, it is common that the guide roller is provided with a position regulating collar, and the guide roller is moved by applying the tape edge to the collar.

[Problem to be solved by the invention]

As shown in FIGS. 5 and 6, the case a of this conventional magnetic tape cassette has ribs b for regulating the position in the tape width direction.
Even if it is provided, it is located at one location on the tape path and is away from the guide pole C and guide roller d, so it does not have sufficient effect and prevents the winding of the tape f.
Otherwise, disturbances tend to occur in the winding and running of the tape during feeding, and damage to the tape edges is caused by the tape edges undulating and coming into contact with each other.
If the guide roller d is attached, there are problems such as disadvantageous molding process of the guide roller d itself, resulting in higher costs, and the winding diameter R of the tape f.
As a result, the contact angle θ between the guide pole C and the tape f decreases as
There were drawbacks such as reduced tape durability.

The present invention is intended to accurately eliminate these conventional drawbacks, and allows the tape to run smoothly and stably within the cassette without any disturbance, and enables stable recording and playback with less damage to the tape edges. The object of the present invention is to provide a tape cassette which can increase the product value, greatly improve the workability of production by reducing the production time, facilitate automation of cassette production, and significantly improve durability.

[Means to solve the problem]

In the present invention, a magnetic tape 2 is placed in a case 1 consisting of an upper case 11 and a lower case 12, and a pair of reel hubs 3,
In the tape cassette, the tape 2 is rotatably stored around a guide pole 4 or a guide roller and a guide roller 5 provided in the case. The inner roller is guided by the cassette center side surface, and the guide roller 5 is guided by the cassette outer wall side circumferential surface, and the guide pole 4
Alternatively, a rib 6.7 for position regulation in the tape width direction that regulates the tape 2 at two places around the guide roller and the guide roller 5 is attached to the upper case 1. and lower case 1. This tape cassette is characterized in that the tape cassette is arranged in a protruding manner opposite to the tape cassette.

〔Example〕

An embodiment of the present invention will be described using an example of an audio magnetic tape socket with reference to FIGS. 1 to 4. An upper case 11, a lower case 1. A magnetic tape 2 or a cleaning tape is wound around a pair of reel hubs 3.3 and rotatably housed in a case 1 consisting of a guide pole 4 and a guide roller 5 with the tape 2 in the case. In a tape cassette that travels while being guided by the guide pole 4, the tape 2 is guided by the cassette center side surface of the guide pole 4, is guided by the cassette outer wall side peripheral surface of the guide roller 5, and is guided by the guide roller 5 around the guide pole 4 and the guide roller 5. The ribs 6.7 for regulating the position of the tape 2 in the tape width direction are arranged in an annular or approximately semicircular shape at two places on the upper case 1. This is a tape cassette that is arranged so as to protrude from and opposite to the lower case 1t.

In this case, the rib 6.7 has a curved top that contacts the tape 2, that is, a tape contact portion, which is formed into a rib with an arcuate cross section, and this is attached to the guide pole 4 and guide roller 5 in an annular or approximately circular shape. They are arranged in an arc shape so that the tape 2 can be regulated in a well-balanced manner at least at a plurality of locations. Further, the guide pole 4 can be used instead of a guide roller if necessary, and this guide roller and the guide roller 5 include a collar for regulating the position in the tape width direction;
Alternatively, a roller made of a cylindrical body or a hollow cylindrical body with the same diameter up to both ends can be used without having a rib, so that the forming process of the roller can be made simple and inexpensive, and the tape running can be made smooth with the ribs 7 around the guide roller. Guaranteed to be convenient.

Note that the tape travels in contact with the guide pole 4 located between the reel hub 3 and the guide roller 5, and as the tape winding diameter R increases when wound around the reel hub 3, the contact angle θ of the guide pole 4 with the tape 2 increases. The tape 2 is guided by the guide pole 4 on the side surface of the cassette center so that the tape 2 increases, and the tape 2 is guided by the guide roller 5 on the cassette outer wall side circumferential surface.

The case 1 has a hole 8 for determining the center position of the case and a capstan insertion hole 9, and the viewing window 10 is integrally molded into the case body using a two-color molding method.

In the figure, 11 is a screw hole for connecting the upper and lower cases, and 12 is a band.

〔Effect of the invention〕

The present invention guides the tape on the cassette center side of the guide pole or the guide roller, guides the tape on the cassette outer wall side circumferential surface of the guide roller, and doubles the tape around the guide pole or the guide roller and the guide roller. Ribs for regulating the position in the width direction of the tape are provided on the upper and lower cases to oppose each other, so that torque fluctuations due to changes in tape winding diameter are small, and constant tension is maintained over the entire length of the tape. In addition, there are position regulating ribs near the guide pole or guide roller, and the tape contacts the tape at multiple locations before and after the guide, which eliminates the drawbacks of the conventional method and improves tape running within the cassette. Since there is no disturbance in the tape and there is less damage to the tape, stable recording and playback is possible, and it is also advantageous in manufacturing molds for forming regulating ribs and rollers. It is easy to manufacture, and the regulating ribs are compatible even when the tape running direction is changed, greatly improving work efficiency, making it easier to automate cassette assembly, and significantly increasing durability, which also prevents damage to the tape. It has the practical effect of ensuring safe driving without any problems, reducing variations in molded products, and making products reliable.

[Brief explanation of drawings]

Fig. 1 is a partial plan view showing an embodiment of the present invention, Fig. 2 is an enlarged vertical sectional view taken along line 1-1 in Fig. 1, and Fig. 3 is a state in which the maximum winding diameter is applied to one side reel hub. A plan view showing the inside of the case, FIG. 4 is a plan view of a portion of the reel huff in use with the minimum winding diameter, FIG. 5 is a plan view of a portion of the conventional example, and FIG.
It is a longitudinal cross-sectional view taken along line ■-■. 1... Case, 2... Magnetic tape, 3... Reel hub, 4... Guide pole, 5... Guide roller,
6,7...ribs. Proceedings June 7, 1990

Claims (2)

[Claims] (1) A magnetic tape (2) is wound around a pair of reel hubs (3) and rotatably stored in a case (1) consisting of an upper case (1_1) and a lower case (1_2). , a guide pole (with the tape (2) inside the case)
4) Or in a tape cassette that runs while being guided by a guide roller and a guide roller (5), the tape (2)
) is guided by the cassette center side of the guide pole (4) or guide roller, and is guided by the cassette outer wall side peripheral surface of the guide roller (5), and the guide pole (4) or the guide roller and the guide roller (5) are guided by the guide roller (5). The upper case (1_1) and the lower case (1_2) are provided with ribs (6) and (7) for regulating the position of the tape in the width direction, which are arranged at two points around the tape (2) and projectingly from each other. Featured tape cassette. (2) The ribs (6) and (7) have curved tops that contact the tape and are arranged in an annular or substantially arc shape on the guide pole (4) or the guide roller and the guide roller (5). The tape cassette described in item 1.