JPH0654572B2 - Tape Producing Equipment - Google Patents

Description

The present invention relates to a tape loading device with a half loading function, and more particularly to a tape having a half loading function for detecting a cue signal of a video tape recorder (VTR). Regarding loading device.

(B) Conventional technology In a video tape recorder (VTR), recording the cueing signal by changing the duty ratio of the control signal of the control track is disclosed, for example, in Dempa Shimbun, September 23, 1986. It is very well known and is shown on one side. By the way, in a home 1/2 inch VTR called the VHS method, a method called M loading is often adopted as a tape loading method as is well known.

In the M loading method, the tape load is large when the tape loading is completed. For this reason, fast-forwarding and rewinding (FF, REW) are performed by storing the tape in the cassette.

However, if it is stored in the cassette, the aforementioned cueing signal cannot be detected. Therefore, in the VHS system VTR having a cueing function, the tape is pulled out a little (half-loading state) and the tape is brought into contact with the control head. Then, the control head reads a control signal (including a cueing signal).

An example of this tape loading device with a half loading function is shown in FIGS. 4 and 5 (a) (b). In FIG. 4, (10) is a tape cassette. The solid line (12) shows the tape locus during half loading (FF / REW). The alternate long and short dash line (13) shows the tape locus when the cassette is mounted. The dotted line (14) shows the tape locus at the completion of loading (at the time of reproduction).

(16) is a back tension pin, (18) is an idler, and (20) is a full width erasing head. (22) is a leading guide on the tape inlet side, (24) is an inclined post on the tape inlet side, (26) is a guide cylinder inclined at a predetermined angle in the arrow direction, that is, in the direction parallel to the cassette, and (28) is the tape. Inclined post on exit side, (3
0) is the leading guide on the tape exit side. (32) is a head for recording / reproducing audio / control signals. (34)
Is a pinch roller. (36) is the capstan.

(38) is a vertical pin for half loading. (10a)
(10b) and (10c) are notches of the cassette, and the back tension pin (16) and the leading guide (22) and the inclined post (24) are arranged in the notch (10a) when the cassette is mounted. In addition, a leading guide (30), an inclined post (28), and a half-loading vertical pin (38) are arranged in the notch (16b) when the cassette is mounted. Notch (10
In c), the capstan (36) is arranged when the cassette is installed.

The above-mentioned leading guides (22) (30) and inclined posts (24) (28) are
A first drawing means for drawing the tape from the cassette (10) is configured to wind the tape around the guide cylinder (26) at a predetermined angle (180 ° or more).

Further, the vertical pin (38) constitutes a second pull-out means for pulling out the tape a little from the cassette (10) in order to bring the tape into contact with the audio / control recording / reproducing head (32). However, from the tape release point (B) from the guide cylinder (26), the audio / control head
Since the distance to (32) is specified by the standard,
In the figure, the position of the audio / control head (32) is as shown in the figure.
The tape contacts the guide cylinder. For this reason,
Since the guide cylinder acts as a tilted post and the tape running position is lowered, it may not accurately contact the audio / control head (32), which may cause a malfunction in cueing.

(C) Problems to be Solved by the Invention The present invention provides a tape loading device in which the tape is kept in non-contact with the guide cylinder even when half loading is performed.

(D) Means for Solving the Problems The present invention allows the guide cylinder to be tilted to the side opposite to the cassette, and the fixing head and the second head so that the tape and the guide cylinder are not in contact with each other when the second tape path is formed. A loading means is arranged.

(E) Action When forming the second tape path, the tape and the guide cylinder are not in contact with each other and the tape is attached to the fixed head.

(F) Embodiment One embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a plan view of a tape loading device in the present embodiment, and FIGS. 2 (a) and 2 (b) are a plan view and a side view of a guide cylinder, respectively. However, the description is omitted.

The guide cylinder (26) in this embodiment is inclined rearward by a predetermined angle (α) when viewed from the side, as shown in FIG. That is, when viewed from above, the inclination direction of the guide cylinder (26) is as shown by an arrow as shown in FIGS. 1 and 2 (a).
It is rotated clockwise by a predetermined angle (β) with respect to the conventional tilt direction (direction parallel to the front surface of the cassette).

Then, as shown in FIG. 2B, the distance from the tape detachment point (B) 'to the inclined post (28) is shorter than in the conventional case.

Therefore, the leading guide (30) and the inclined post (28) are
Since it approaches (10), the positions of the audio / control head (32) and the vertical pin (38) at the time of pulling out also inevitably approach the cassette (10). On the contrary, the leading guide (22) and the inclined post (24) are arranged at a position slightly apart from the cassette (10).

Therefore, when performing half loading, the tape track (1
2) is not in contact with the guide cylinder (26) as shown by the solid line. Further, the winding direction of the tape around the guide cylinder is the same as the conventional one.

Needless to say, the predetermined angle (α) is set to such a size that the audio / control head (32) can be arranged so that the guide cylinder (26) and the tape are not in contact with each other during half loading. .

The position of each post with respect to the guide cylinder of the loading device in this embodiment is as shown in FIG.

(G) Effect of the Invention As described above, according to the present invention, the tape is kept in non-contact with the guide cylinder even when half-loading is performed, so that the tape traveling position is not hindered and the head is accurately moved. A take-out operation can be performed.

[Brief description of drawings]

FIG. 1 is a plan view of a tape loading device according to an embodiment of the present invention, FIGS. 2 (a) and 2 (b) are plan views and side views of the guide cylinder, and FIG. A table comparing the example with this example, FIG. 4 is a plan view of a conventional tape loading device, and FIG. 5 is (a) (b).
FIG. 3A is a plan view and a side view of the guide cylinder. (10) ... cassette, (22) (30) ... leading guide, (24) (28) ... tilted post, (26) ... guide cylinder, (32) ... audio /
Control head, (38)… Vertical post.

Claims (1)

[Claims] 1. A guide cylinder inclined with respect to a plane of a cassette, a first loading means for drawing a tape from the cassette and helically winding the tape around the guide cylinder to form a first tape path, and arranged outside the cassette. A guide head opposite to the cassette, wherein the guide cylinder is opposite to the cassette; and a second loading means that forms a second tape path by pulling out the tape from the cassette and contacting the fixed head with the fixed head. A tape loading device that is tilted to the side and has the fixed head and second loading means arranged so that the tape and the guide cylinder do not come into contact with each other when the second tape path is formed.