JPS58102375A - Tape cassette - Google Patents

Abstract

PURPOSE:To obtain an inexpensive tape cassette which is applied widely by guiding a running tape through a tape guide means, capstan, etc., provided on a recorder side, and thus eliminating the performance variance of cassette cases depending upon the formation precision and performance difference between A- side use and B-side use. CONSTITUTION:A recording tape 4 is driven by a capstan 34 inserted into a side capstan insertion hole 18 and a pinch roll 30 entered from an opening part 5. A common recording and reproducing head 31 is entered from an opening part 6 to contact a pad 22, and an erasing head 32 is entered from an opening part 8 to contact a pad 23. Further, a tape guide 33 is inserted from a side capstan insertion hole 19. Consequently, a small-sized tape device which has performance and functions close to those of a high class device is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tape cassette that can stabilize tape running and improve performance.

Conventionally, in tape cassettes, tape guide pins for guiding tape travel have been integrally molded into the cassette case, and the performance of the cassette has been greatly influenced by variations in the verticality of these pins. In particular, tape cassettes for both A-side and 8-side use are extremely inconvenient because even if the same cassette is used, performance changes between A-side and 8-side use.

In addition, as cases become smaller and tape speeds become slower, such as in the case of small cassettes, which have recently become popular, tape guide bins can be made with high precision by molding synthetic resin.
Maintaining these properties requires extremely advanced molding technology, which is also a factor in high costs.

The present invention eliminates such dispersion in performance, and also eliminates any tape guide means from inside the cassette so that it can realize the functions and performance of a high-end machine such as a 3-head machine despite the miniaturization of the cassette. The tape provided on the recorder side that is inserted through the hole is guided by the tape guide means, and two pads are made to look into the opening adjacent to the central opening, and the head inserted between the two pads is guided. The cassette is designed to ensure that the tape is touched by the tape tension applied by the pad, making it possible to create a cassette that can be used in an extremely wide range of applications.

First, Figure 1 is a top view showing the inside of a conventional small tape cassette, where 1 is the cassette case, 2 and 3 are the winding layers of the recording tape wound around the hub, and 4 is the recording tape at the running speed. ,5,6. 8 and 9 are openings provided on the front of the cassette, 10 and 11 are tape guide pins, and 12113 is a tape guide roller, which guide the tape to run along the openings 5 to 9. Reference numerals 14, 15, 16, and 17 are tape guides that are installed from the cassette case 1 to regulate the angle at which the tape is wrapped around the head that enters through the opening.

18. 19 is a capstan insertion hole for inserting a side capstan, 20 is a capstan insertion hole for inserting a center capstan, and 21 is a pad spring that supports pads 22 and 23. Press 4.

Since the conventional tape cassette has such a configuration, the verticality of the tape guide pins 14, 15, 16, 17 affects the azimuth shift of the recording tape 4 toward the head entering from the opening 6, 7, 8, etc. This causes a difference in performance between the A-plane phase and the use of 8-planes, and the accuracy of perpendicularity is extremely strictly required.

FIG. 2 is a top view showing the inside of an embodiment of the tape cassette according to the present invention. The same components as those of the conventional tape cassette shown in FIG. 17 is removed, and tape guide insertion holes 24 and 25 are provided on the rear flat parts of both left and right ends of the central opening 7, that is, on both sides of the capstan insertion hole 20, and stoppers 26 for positioning both ends of the pad spring 21 are provided. .27 is provided.

The cassette is constructed as described above, and the practical state of the cassette will now be explained. FIG. 3 is a top view showing the main parts of the center capstan system in a practical state, where 29 is a capstan inserted through the capstan insertion hole 20, and 30 is an opening 7.
The recording tape 4 is sandwiched between the recording tape 4 and the capstan 29 by a pinch roller introduced from the capstan 29 and driven by friction. Reference numeral 31 denotes a recording/reproducing head inserted through the opening 8, 32 an erasing head inserted through the opening 9, and 33 a tape guide inserted into the capstan insertion hole 19 on the side. In this way, the degree to which the recording tape 40 hits the recording/playback head 31 is not influenced by the cassette side, but is determined by the mechanism, that is, by the capstan 29 and tape guide 33 provided on the recorder side. Exactly the same tape running can be obtained using A.
There is no difference in performance between the surface phase and the use of 8 surfaces.

FIG. 4 is a diagram showing the practical state of the side capstan method, in which the capstan 34 is inserted into the side capstan insertion hole 18 and the pinch roller 30 is inserted through the opening 5.
The recording tape 4 is driven by this. Recording/playback head 31
The erase head 32 enters through the opening 6 and comes into contact with the pad 22, and the erasing head 32 enters through the opening 8 and comes into contact with the pad 23. Reference numerals 35 and 36 indicate tape guides inserted through the tape guide insertion holes 24 and 25. Note that the tape guide 33 is inserted through the side capstan insertion hole 19 in the same manner as described above.

Figure 5 shows another example of the side capstan type shown in Figure 4, which has a three-head configuration, with an opening 7 in the center.
The recording-only head 38 is inserted from the top. 37 is a reproducing head that enters from the opening 6. As shown in the example of FIGS. 4 and 5, the pad 2 for the erasing head 32 is
Appropriate tension is generated on the recording tape 4 when the recording head 38 comes in contact with the recording head 38, and the tape touch can be ensured even if the pad does not come into contact with the recording head 38 as in the example shown in FIG. Therefore, there is no need to apply bank tension to the tape using the supply reel 7 or stand (not shown), which is suitable for downsizing and energy saving.

Figure 6 shows how to eliminate modulation noise generated from the pad.
This figure shows a practical example of the double capstan method with the pad inactive.The difference from the practical example shown in Figure 5 is that the capstan 4 is also inserted into the side capstan insertion hole 19.
o, and also enter the pinch roller 39 through the opening 9 to connect these two sets of capstans 34 and 40 with the pier.
f o -730,39, tension is generated in the recording tape 4 running between the two capstans due to the difference in circumferential speed between the two capstans. In this case, in order to eliminate the need for the pads 22, 23 to press the tape against each head, the tape guides 41, 42, which have a rear inclined portion and are set up on the chassis 43, are inserted into the tape guide insertion holes as shown in FIG. 24 and 25, and the tape guides 41 and 42 displace the pad spring 21 backwards when the cassette is installed, and the pads 22 and 23 are inserted into the playback head. I try to stay away from 32.

Retracting the blades 22 and 23 is easy because a portion of the pad spring 21 is visible through the r1 tape guide insertion holes 24 and 25.

FIG. 8 shows another embodiment in which the center capstan insertion hole and two tape guide insertion holes are combined into one continuous hole 2.
8 and Shidamono, and the same applies here.

As described above, the present invention does not guide the running of the tape on the cassette side, but uses the tape guide means, capstan, etc. provided on the recorder side. The difference in performance between 8-sided and 8-sided machines has been eliminated, and not only the center capstan type but also the side capstan type can be used, and a 3-head configuration is also possible, making it possible to achieve the performance and functionality of a small, high-end machine. This is an inexpensive tape cassette that has an extremely wide range of applications.

[Brief explanation of the drawing]

Fig. 1 is a top view showing the inside of a conventional tape cassette, Fig. 2 is an internal top view showing an embodiment of the present invention, and Figs. 3, 4, 5, and 6 are the same tape cassette. 7 is a side view showing the tape guide, and FIG. 8 is an internal top view showing another embodiment. 1...Cassette case, 4...Recording tape, 5-9...Opening i, 18, 19.20...
... Capstan insertion hole, 21 ... Pad spring,
22.23... Band, 24.25...
・Tape guide insertion hole, 28... hole. Name of agent: Patent attorney Toshio Nakao (1st person)
Figure 2 Figure 3 Figure 5 Figure 6 Figure 7 Figure 8

Claims (4)

[Claims] (1) - Capstan insertion holes are provided at least on both left and right sides of the flat part of the sumo wrestler case that looks into the openings so that the recording tape runs along the multiple openings provided on the side, and capstan insertion holes are provided in the center part. A tape pad is provided inside the opening and two adjacent left and right openings, and a tape guide insertion hole is provided in a flat part corresponding to both left and right ends of the central opening, and a recording tape running guide is inserted through the opening. A tape cassette characterized in that the tape cassette is configured to be operated by a capstan and tape guide means inserted through a hole. (2) The tape cassette according to claim 1, characterized in that the pad is held by a pad spring and the pad spring extends through the tape guide insertion hole. (3) The tape cassette according to claim 1, characterized in that a capstan insertion hole is provided between the two tape guide insertion holes. (4) Claim 3, characterized in that the capstan insertion hole provided at the center and the two tape guide insertion holes provided on the left and right sides of the capstan insertion hole are formed as one continuous hole. tape cassette.