JPS6117582Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tape guide mechanism that guides a tape that is led out from a guide cylinder and comes into contact with a fixed head.

In a cassette-type video tape recorder, which loads the tape by rotating a loading disk, the tape is pulled out from a cassette held horizontally to the base, and the tape is wound at a predetermined angle around a diagonally inclined guide cylinder. The tape is led out diagonally with respect to the base, and the upper and lower sides of the tape are scanned by a fixed head to record and reproduce control signals and audio signals. Therefore, in order to guide the tape stably, the fixed guide or fixed head must be fixed parallel to the tape surface of the tape led out from the guide cylinder, and the fixed state of the fixed guide or fixed head is usually adjustable. is being used. However, installation errors during the manufacturing process may exceed the adjustment range, and the tape may not be able to properly contact the fixed head. If the tape does not properly abut the fixed head and the tape moves across its width, the audio track or control track cannot be scanned properly and the tape becomes incompatible.

Therefore, in view of the above-mentioned points, the present invention has been proposed by adding a guide for adjusting the inclination of the tape surface between the guide cylinder and the fixed guide for regulating the tape winding angle, so that the fixed guide and the fixed head can be fixed. The present invention proposes a specific configuration of a tape guide mechanism configured so that the tape contacts a fixed head in a predetermined state even when the tape is not fixed in a predetermined inclined state.

The present invention will be described below with reference to an illustrative embodiment. FIG. 1 shows a plan view showing the tape loading state of the apparatus of this embodiment, in which the number 1 is a tape cassette, 2 is a guide cylinder, 3 is a loading disk, and 4 is a back tension pin 4a. 5 and 6 are first and second fixed guides that guide the tape to the erasing fixed head 7;
8 and 9 are third and fourth fixed guides that guide the tape to the audio fixed head 10 and the control head 11; 12 is a capstan; 13 is a leading guide;
14 is a pinch roller, 15 is a first guide post on the loading disk, 16 is a second guide post, and 17 is a third guide post. In the figure, numbers 18 to 23 indicate the constituent members of the tape guide mechanism that constitute the essential parts of the present invention, and number 18 is a leaf spring that forms a bending guide 18a at its tip to change the running state of the tape, and 19 is the leaf spring described above. A support lever 21 (see FIG. 3) which is pivotally supported by the second guide post 16, is biased to rotate clockwise by a spring 20, and supports and fixes the leaf spring 18, is mounted on the loading disk 3. The support lever 2 is held upright.
Locking pin 22 that restricts clockwise rotation of 0
is the bending guide 1 in the loading completed state.
8a with a V-shaped cutout 22a (see FIG. 2), and 23 is a guide fixing fitting (see FIG. 2) that supports the plate spring 18 in order to press the bending guide 18a into contact with the cutout 22a when loading is completed. Each of the pressure welding pins that can be rotated counterclockwise is shown.

Therefore, according to the present embodiment, the plate spring 18 that is locked by the locking pin 21 during loading is guided by the pressure pin 23 and is guided by the bending guide 18.
a to the notch 22a of the guide fixture 22, and when loading is completed, the bending guide 18 is brought into pressure contact with the notch 22a, thereby correcting the running state of the tape T led out from the guide cylinder 2. The audio fixed head 10 and the control head 11 guide the tape T so that the audio tracks and control tracks formed on both the upper and lower sides of the tape T can be correctly scanned. Incidentally, the attitude adjustment of the bending guide 18a is performed as shown in the AA′ cross-sectional view of FIG.
This is accomplished by an adjustment screw 22b that is screwed into the guide fixing fitting 22 and faces the fixing block 24. That is, in this embodiment, the notch 22a is moved forward or backward by adjusting the screwing amount of the adjustment screw 22b, and the supporting position of the bending guide 18a is changed. This change was corrected by the bending guide 18a, and sufficient compatibility of recording tracks could be maintained.

Therefore, according to the present invention, even if a manufacturing error occurs, the running condition of the tape can be adjusted by a simple adjustment, which is highly effective.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing one embodiment of the present invention;
The figure shows a sectional view along AA' of FIG. 1, and FIG. 3 shows an exploded perspective view of the components arranged on the loading disk. Explanation of main drawing numbers, 1...Cassette, 3...Loading disk, 3...Guide cylinder, 1
6... Guide post, 20... Support lever, 18
...Plate spring, 18a...Bending guide, 22...Guide fixing fitting, 23...Pressure pin.

Claims (1)

[Scope of claim for utility model registration] By rotating the loading disk that fixes the leading guide and multiple guide posts,
In a videotape recorder in which the outer recording surface of the pulled-out tape loop is wound around the circumferential surface of a guide cylinder and brought into contact with a fixed head and a fixed guide, loading a leaf spring that forms a bending guide at the tip. a support lever that is fixed in a direction and rotatably pivoted with respect to the guide post; a spring that biases the support lever to rotate toward the outside of the loading disk; and the loading disk. a locking pin planted above and regulating rotation of the support lever; disposed between the tape exit portion of the guide cylinder and the fixed guide running to the fixed head;
A fixing fitting that adjustably supports the bending guide that comes into contact with the inside of the tape loop when loading is completed; and a pressure contact pin that is fixed inside the loading disk and guides the leaf spring toward the fixing fitting during loading. , a tape guide mechanism that is arranged respectively.