JPS6231418B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tape running mechanism for a fixed head video tape recorder that utilizes endless tape.

A fixed head, pinch roller, and capstan are arranged inside the tape roll of endless tape, and the fixed head, pinch roller, and capstan are brought into contact with the tape path that is led out from inside the tape roll at high speed and reaches the outer periphery of the tape roll. Techniques for recording and reproducing video signals are well known. That is, in the conventional example shown in FIG. 1, the innermost tape is pulled out from a notch 1a formed in a tape hub 1, which serves as a winding frame for an endless tape roll, brought into contact with a fixed head 2, and then connected to a capstan 3. A configuration is adopted in which the tape is pulled and driven by a pinch roller 4 to reach the outer periphery of the tape roll. Reference numbers 5 and 6 are tape guides that define the wrapping angle of the tape around the fixed head 2. The conventional example described above includes a fixed head 2 and tape drive means 3 and 4, which are the main mechanisms of a video tape recorder.
is placed inside tape hub 1, tape hub 1
It was necessary to make the inner diameter sufficiently large. This limits the ability to make the tape cartridge compact, making it inconvenient to handle.

Therefore, in order to make the tape cartridge compact, it is possible to arrange the fixed head 2 and tape drive means 3 and 4 outside the tape roll. It has been confirmed that when the tape is brought into contact with the means 3 and 4, the tape path becomes unnecessarily long, causing longitudinal vibration in the tape.

Therefore, in the present invention, only the fixed head is left inside the tape hub, the tape driving means is arranged outside the tape roll, and the tape between the fixed head and the tape driving means is extended to the outer periphery of the tape hub to absorb the longitudinal vibration of the tape. This paper aims to propose a new tape running mechanism.

The present invention will be explained below according to an embodiment shown in FIG. In this embodiment, three notches 1a, 1b, and 1c are provided in the tape hub 1 to change the tape path, and a fixed head 2 is arranged on the inner circumference of the tape hub 1 to drive the tape winding means 3 and 4. It is characterized by being placed outside the body.

The tape path of this embodiment includes a first tape path within the tape hub 1 that exits from the first notch 1a and reaches the second notch 1b, and a first tape path that extends from the second notch 1b to the tape hub 1 and the inner periphery of the tape roll. 3rd sandwiched between
a second tape path leading to the notch 1c;
It consists of a third tape path extending from the notch 1c to the outer periphery of the tape roll. The fixed head 2 whose circumferential state is defined by tape guides 5 and 6 circumferentially surrounds the first tape path, and the longitudinal vibration of the tape generated in the third tape path is suppressed in the second tape path. The third tape path includes inclined guides 7 and 8 that guide the tape to the outside of the tape roll, and tape guides 9 and 8 that stretch the tape outside the tape roll.
10, a capstan 3 and a pinch roller 4 that pinch the stretched tape and make it run at high speed.
are arranged.

Therefore, in this embodiment, the longitudinal vibration of the tape occurring between the guides 7, 8, 9, and 10 located apart in the third tape path is absorbed by the second tape path, and the longitudinal vibration of the tape is absorbed by the second tape path. No longitudinal vibration was transmitted to the path, eliminating the possibility of jitter occurring during playback.

As described above, according to the present invention, by changing the arrangement of the fixed head and tape drive means and the tape path, it is possible to make the cartridge more compact and stabilize the reproduced image, which has great effects.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of the main mechanism of a conventional fixed head video tape recorder, and FIG. 2 is a schematic diagram of the main part of a mechanism according to an embodiment of the present invention. Explanation of main drawing numbers, 1... Tape hub, 1a, 1
b, 1c...first, second and third notches, 2...fixed head, 3, 4...tape drive means.

Claims (1)

[Claims] 1. A tape hub having an endless tape roll formed on its outer periphery and integrally molded with a cartridge case and having three notches, a fixed head located within the tape hub when the cartridge is attached, and a fixed head located outside the tape roll. each tape drive means is disposed, and the fixing head is brought into contact with a first tape path extending from a first notch and entering a second notch;
The longitudinal vibration of the tape is suppressed by a second tape path that enters through the second notch, passes through the outer periphery of the tape hub, and exits from the third notch, and the third tape path that exits from the third notch and reaches the outer periphery of the tape roll. A tape running mechanism for a fixed head video tape recorder, characterized in that the tape driving means is brought into contact with the tape path of the fixed head video tape recorder.