JPH0447391B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a tape loading device for high-speed searching of a video tape recorder. By relying on the head of
The present invention relates to a tape loading device for high-speed searching of a video tape recorder, which enables accurate searching for the position on the tape where the program is recorded when the program is played back.

[Conventional technology]

Conventionally, in a tape loading device that performs high-speed searching, as shown in FIG. In a normal deck mechanism, the tape is wound around the rotating head drum 5 at a predetermined angle, passed through the audio control head 6, the capstan shaft 7 and the pinch roller 8, and then wound onto the take-up reel 9. A search sensor 11 is installed on the deck board 10, and when the user records a program on the tape T, a specific signal is recorded in the program header using the erasing head 4 located on the supply side of the tape T. It's becoming like that. When reproducing this program, use the search sensor 11 in fast forward/reverse mode,
The signal recorded on the tape T was read, the recording position of the signal was searched, and the tape T was automatically sent to the playback position.

In addition, in order to load the tape into the playback mode, as shown in FIG.
Cam gear 16 via 14, 14', 15, 15'
is transmitted to the pinion gear 1 via the rack gear 17 by the cam 16a of the cam gear 16.
8 is rotated. Next, loading gear 1
Loading is completed by pulling the tape T and press-fitting the inclined post assemblies 20, 20' connected by a lever mechanism via the lever mechanism 9, 19' to the stoppers 21, 21'. However, the levers 22, 2 to which the inclined post assemblies 20, 20' are attached are attached to the loading gears 19, 19'.
2' and loading arms 23, 23' are connected, but as shown in FIG. 4 (only one gear assembly is shown), the loading gear 19 has an annular groove 19a in the center of the bottom surface. A protrusion 19b is formed downward and connected to the loading arm 23 by a bush 24 fitted in the annular groove 19a. The loading arm 2
One end of a tension coil spring 27 that presses the inclined post assembly 20 to the stopper 21 is fixed to the hooking piece 23a protruding from one side of the coil spring 27. After contacting the outer peripheral surface of the protrusion 19b of the loading arm 23 in a winding manner, the other end is fixed to a hooking piece 19c that is hooked to a notch 23b formed on one side of the loading arm 23. I was getting used to it. In other words, in such conventional loading devices, it is not possible to perform half-loading, but only complete loading, so it is necessary to record and search signals in separate heads. I was getting used to it.

[Problem to be solved by the invention]

In the conventional deck mechanism configured as described above, when recording a signal on the tape T, the signal is recorded by the erasing head 4 on the running path of the tape T in the playback mode in a fully loaded state, and
When searching for that signal again, the signal is searched for using a search sensor 11 that is different from the recording position of the signal in the fast forward/reverse mode of the high-speed driving mode. When the tape T is loaded again and played back due to the difference in position, there is a problem that the desired screen position cannot be accurately searched for.

[Means to solve the problem]

According to the present invention, when the loading gear device is configured to perform not only loading but also semi-loading and rereading the signals recorded on the tape stomach, the loading gear assembly on one side By rotating the tape by a predetermined angle and pressing the tape against the audio control head, the recording of the signal and the probe for reading the signal can be performed with one and the same head.

〔Example〕

Embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 1 is an exploded perspective view showing the configuration of a loading gear assembly according to the present invention, and FIG. 3 is a schematic plan view showing the loading gear device of the present invention in a fast forward/reverse mode for high-speed exploration. As shown in the drawing, a toothless portion 25a is formed at a predetermined angle on the outer circumferential surface of the loading gear 25 on one side, and a latching protrusion 25b protrudes at a predetermined position on the bottom surface. Furthermore, a shaft hole 25c is formed in the center portion. Further, below the loading gear 25, an annular rotating body 26 formed at the center of the upper surface of the bearing portion 26a, which is fitted into the shaft hole 25c, is rotatably fitted. A pair of locking steps 26b, 26b' having a predetermined distance are formed on the upper surface of the rotating body 26 toward the bearing portion 26a, and the loading gear 25 is held between the locking steps 26b, 26b'. A locking protrusion 25b protruding from the bottom surface is located. An annular projection 26c having an annular groove 26e (not shown) is projected downward from the center of the bottom surface of the rotating body 26. A bushing 24 is fitted into the annular groove 26e, and a loading arm is attached to the bush 24. 23 are joined. Further, a locking pin 26d is protruded downward from a predetermined position on the bottom surface of the rotating body 26, and when the loading arm 23 is joined to the lower side of the rotating body 26, a predetermined angle is attached to the outer periphery of the loading arm 23. The rotational force of the loading gear 25 is applied to the locking protrusion 2 by the locking pin 26d being engaged with the notch 23b formed over the
5b and the latching stages 26b, 26b', and then to the loading arm 23 and is transmitted to the tilt post assembly 20 via the lever 22 connected to the end of the loading arm 23. It is configured as follows.

[Effect]

The device according to the invention comprises a tilted post assembly 20,
20' is advanced to the stoppers 21 and 21' in the playback mode in a completely loaded state, a specific signal is recorded by the audio control head 6, and in the fast forward/reverse mode, the right side (based on Figs. 2 and 3) is used. ) inclined post assembly 20,2
As shown in FIG. 3, the position 0' is in a half-loading state, and the tape T is wrapped around the audio control head 6 by a predetermined angle. This is because the function of recording and searching for a specific signal on the tape T is performed by a single audio control head 6, unlike in the past. Therefore, when the apparatus of the present invention is in a stopped state, the above-mentioned latching protrusion 25b on the bottom surface of the left loading gear 25 is in contact with the latching step 26b on one side of the rotating body 26. In such a state, when proceeding to the fast forward/reverse mode to perform a high-speed search, the power of the drive motor is transmitted to the left loading gear 25 through the same path as in the conventional case. In the loading gear 25, the latching protrusion 25b on the bottom surface is in contact with the latching step 26b of the rotating body 26, so that the latching protrusion 25b is in contact with the latching step 26b on the other side.
Until it comes into contact with 6b', the rotating body 26 rotates idly and no rotational force is transmitted. However, rotating body 2
6 is idly rotating, the loading gear 25
Since the loading gear 19' on the right side, which is engaged with the loading gear 19', is rotating due to the rotation of the loading gear 25, the loading arm 23' and the lever 2, which are engaged with the lower side of the loading gear 19', are rotated by the rotation of the loading gear 25.
2' advances the tilt post assembly 20' to a semi-loaded state as shown in FIG. 3, allowing the tape T to wrap around the audio control head 6.

Therefore, signals recorded on the tape T can be detected using the audio control head 6 in this half-loaded state.
On the other hand, in such a state, when loading the tape T to a completely loaded state for playback, if the loading gear 25 is continuously rotated, the latching protrusion 2 on the bottom of the loading gear 25
5b is in contact with the locking step 26b' of the rotating body 26, the rotational force is transmitted to the rotating body 26, and the inclined post assembly 20 moves forward. At this time, the loading gear 25 The cutting tooth portion 23b is positioned on the other side loading gear 19', and eventually the loading gear 19' rotates idly by the circumferential distance of the notch 23b. Thus, the left side tilt post assembly 20 advances until it is brought into line with the previously advanced right side tilt post assembly 20', and the left side tilt post assembly 20
0 and 20' are located on the same line, both loading gears 25 and 19' are meshed and simultaneously move forward toward the stoppers 21 and 21', respectively.

〔Effect of the invention〕

As explained above, the present invention has the advantage that the recording and detection of signals for screen search can be performed using the same head, so that the position on the tape where the signal is recorded can be accurately searched. There is.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view showing the configuration of a loading gear assembly according to the present invention, FIG. 2 is a schematic plan view showing a stop mode state of a deck mechanism in which a loading device according to the present invention is installed, and FIG.
The figure is a schematic plan view showing the loading device of the present invention in a fast forward/reverse mode for high-speed search, FIG. 4 is an exploded perspective view showing the configuration of a conventional loading assembly, and FIG. 5 is a conventional loading device. FIG. 6 is a schematic plan view showing a state in which a tape cassette is disposed in a loading mechanism, and FIG. 6 is a bottom view showing a conventional loading mechanism. 12... Drive motor, 20... Inclined post assembly, 22... Lever, 23... Loading arm, 23b... Notch, 24... Bush, 2
5... Loading gear, 25a... Missing tooth part,
25b...Latching protrusion, 25c...Shaft hole, 26...
Rotating body, 26a...Bearing section, 26b, 26b'...
Latch step, 26c... annular protrusion, 26d... connecting pin, 26e... annular groove, T... tape.

Claims (1)

[Claims] 1. A toothless portion 25a having a predetermined angle on the outer peripheral surface of the loading gear 25 on one side of the video tape recorder.
At the same time, a locking protrusion 25b is protruded from a predetermined position on the bottom surface of the loading gear 25, and a predetermined interval is formed on the inner periphery of the upper surface of the rotating body 26 which is rotatably fitted to the bottom surface of the loading gear 25. A pair of latching steps 26b and 26b' are formed so that the latching protrusion 25b of the loading gear 25 is positioned between the latching steps 26b and 26b', and A connecting pin 26d is provided at the position protruding downward, and a downward annular groove 26e is formed on the bottom surface of the rotating body 26.
A notch is provided over a predetermined angle on the outer circumferential surface of the loading arm 23, which is connected to the lower side of the rotating body 26 via the bush 24 fitted in the annular groove 26e. 23b, the connecting pin 26d of the rotating body 26 is located in the notch 23b, and the loading arm 2
3. A tape loading device for high-speed searching of a video tape recorder, characterized in that the end of the tape is connected to a tilted post assembly 20 via a lever 22 so that a tape can be partially loaded.