JPH0355151Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a tension arm moving mechanism of an automatic tape loading device, and particularly in a device in which the tension arm is pushed back by a loading pole assembly during tape unloading. This invention relates to a mechanism for moving an arm to a position where it can be pushed back by a loading pole assembly.

BACKGROUND OF THE INVENTION Some automatic tape loading devices include devices in which a tension arm is locked by a loading pole assembly and pushed back into a tape cassette during tape unloading. In order to push the tension arm back using the movement of the loading pole assembly,
It is necessary to rotate the tension arm from the operating position where the tension pole is in contact with the magnetic tape being pulled out from the tape cassette to the position where it is locked by the loading pole assembly moving toward the tape cassette. . Conventionally, the tension arm has been rotated by using, for example, a pinch roller pressing/separating mechanism against the capstan.

Problems that the invention aims to solve: Since the crimping/separating mechanism is located at a location distant from the tension arm, a link mechanism is required to transmit the movement of the crimping/separating mechanism to the tension arm, resulting in a complicated configuration. There was a problem with this.

An object of the present invention is to provide a tension arm moving mechanism for an automatic tape loading device that solves the above-mentioned problems.

Means for Solving the Problems The present invention provides a push-back section on the erasing head base arm itself, which is disposed near the tension arm and rotated so as to be pushed away by the loading pole assembly during tape unloading operation. , when the erase head base arm rotates, its push-back part pushes the vicinity of the tip of the tension arm,
The tension arm is configured to be moved to a position where it is locked by a loading assembly.

Embodiment Next, an embodiment of the tension arm moving mechanism of the automatic tape loading device according to the present invention will be described.

First, the tape loading and unloading operations of the automatic tape loading device 1 will be schematically described. FIG. 1 shows a state in which tape loading has been completed, FIG. 2 shows a state in which tape unloading has been completed, and FIG. 3 shows a state in which tape unloading is in progress.

In each figure, 2 is a loading pole assembly on the supply side, and a loading pole 6 is attached to a base 5 that fits into a bent guide groove 4 formed in the chassis 3.
It is constructed by erecting. Reference numeral 7 denotes a loading pole assembly on the take-up side, which has a configuration in which a loading pole 10 is erected on a base 9 fitted into a guide rail 8 laid on the chassis 3.
Each of the loading pole assemblies 2 and 7 is moved from the position shown in FIG.
It reciprocates along the guide groove 4 and guide rail 8 between the positions shown in the figure.

During the tape loading operation, each loading pole assembly 2, 7 moves to the final position shown in FIG. 1 while pulling out the magnetic tape 12 from the tape cassette 11 loaded by the loading poles 6, 10. Thereby, the magnetic tape 12 is wound around the guide drum 13 over approximately 270 degrees. A tension arm 15 is provided between the guide drum 13 and the supply tape winding body 14.
is rotated counterclockwise about the shaft 17 by the spring 16, and the tension pole 18 comes into contact with the magnetic tape 12 pulled out of the tape cassette 11 from the supply side tape winding body 14, and the magnetic tape 12 is wound around the supply reel shaft 19. The released brake band 20 is under tension and the tape tension control mechanism 21 is in operation.
Additionally, a full width erase head 22 is attached to the magnetic tape 12. Further, between the guide drum 13 and the tape winding body 23 on the winding side, the magnetic tape 12 is guided by an inclined pole 24, attached to an audio control head 25, and furthermore, is attached to a pinch roller 26.
and a capstan 27. The magnetic tape 12 runs along the tape path, and television signals are recorded or reproduced.

Furthermore, during the tape unloading operation, the loading pole assemblies 2 and 7 move from the position shown in FIG. 1 to the position shown in FIG. The tape is wound onto the tape roll 23 and returned into the tape cassette 11. Note that, as will be described later, the tension arm 15 is pushed back by the loading pole assembly 2.

Next, the tension arm moving mechanism 30 provided in the above device 1 will be explained.

A head base arm 31, which is equipped with a full-width erasing head 22 at its tip, is rotatably supported at its base by a shaft 32, is urged to rotate clockwise by a spring 33, and has a stopper (not shown). )
The clockwise rotation is restricted at the position shown in FIG. The shaft 32 is also located near the tension pole 18 when the tape tension control mechanism 21 is in operation.

Reference numeral 34 denotes a push-back portion which is an important part of the present invention, and extends from the base of the head base arm 31 to the right in FIG. It is provided so as to protrude inward.

The base 5 of the supply side loading pole assembly 2 has a substantially triangular shape with the top 5a being the top side in the direction of movement during tape unloading operation.

When the tape unloading operation is started and the loading pole assembly 2 moves, the top 5a of the base 5 first comes into contact with and pushes the tip side surface 31a of the head base arm 31 that diagonally crosses the guide groove 4. , the head base arm 31 is rotated counterclockwise against the spring 33. That is, the loading pole assembly 2 moves by rotating the head base arm 31 counterclockwise as shown in FIG. When the head base arm 31 rotates counterclockwise, the push-back section 34 also rotates counterclockwise about the shaft 32 integrally with it. The tip of the push-back section 34 pushes the inner circumferential side surface 15b of the curved section 15a near the tip of the tension arm 15 from the back of the curved section 15a toward the tip side of the tension arm 15 so as to rub it. Push back part 3
4, the tension arm 1
As shown in FIG.
It is rotated to a position where it can be locked by a.

When the loading pole assembly 2 moves further, the top 5a of the base 5
In the final stage when the loading pole assembly 2 moves to the final position shown in FIG. Tension pole 1 is pushed back to the position shown in the figure.
8 returns to the tape cassette 11.

Note that the head base arm 31 returns to its rotational position when the loading pole assembly 2 passes through a location opposite to it.

Effects of the Invention As described above, according to the tension arm moving mechanism of the automatic tape loading device according to the present invention, the erasing head base arm itself is required to move the tension arm to a position where it can be locked by the loading pole assembly. Since the structure utilizes a push-back section provided in the tension arm, members such as links or levers that were conventionally provided for the above-mentioned movement of the tension arm are not required, and the number of parts is reduced, simplifying the structure and It is possible to reduce assembly man-hours.

Further, since the push-back portion is configured to push the vicinity of the tip of the tension arm, the pushing force required to rotate the tension arm is smaller than that of a configuration that pushes the vicinity of the base of the tension arm. As a result, the tape unloading operation is performed smoothly and without any trouble, and the load on the motor for the tape unloading operation is small, making it possible to downsize the motor and save power.

[Brief explanation of the drawing]

FIGS. 1 and 2 are plan views showing an embodiment of the tension arm moving mechanism according to the present invention together with an automatic tape loading device to which the tension arm moving mechanism is applied in a state in which tape loading is completed and a state in which tape unloading is completed, respectively. 3 is a plan view showing the operating state of the tension arm moving mechanism of FIG. 1 during tape unloading. 1... Tape automatic loading device, 2... Supply side loading pole assembly, 3... Chassis, 4...
Guide groove, 5...Base, 5a...Top, 6...Loading pole, 11...Tape cassette, 1
2... Magnetic tape, 13... Guide drum, 14
... Supply side tape winding body, 15 ... Tension arm, 15a ... Curved part, 15b ... Inner peripheral side,
15c...Tip, 16...Spring, 17...Shaft,
18... Tension pole, 19... Supply reel shaft, 20... Brake band, 21... Tape tension control mechanism, 22... Full width erasing head, 30
...Tension arm moving mechanism, 31... Head base arm, 31a... Tip side surface, 32...
Shaft, 33... Spring, 34... Push-back portion.

Claims (1)

[Claim for Utility Model Registration] Moving in one direction along a guide path, pulling out a magnetic tape from a tape cassette loaded with it, winding it around a guide drum, and moving in the opposite direction to the one direction along the guide path. A loading pole assembly is mounted with an erasing head and is supported at one end so as to be rotatable. an erasing head base arm that is pushed away by the loading pole assembly and rotates in one direction and returns to rotation when the loading pole assembly passes; and a tension pole attached to the magnetic tape pulled out from the tape cassette. an automatic tape loading device comprising a tension arm having a tension arm at its tip, which is locked to the loading pole assembly moving in the opposite direction and pushed back so that the tension pole enters into the tape cassette. The erasing head arm itself is integrally provided with a push-back portion that presses the vicinity of the tip of the tension arm and pushes back a portion of the tension arm when the erase head arm rotates in the one direction; Due to the rotation of the erasing head base arm during the movement of the loading pole assembly in the opposite direction, the vicinity of the tip of the tension arm is pushed by the push-back part, causing the loading pole assembly to move in the opposite direction. A tension arm moving mechanism of an automatic tape loading device configured to be moved to a locked position.