JPH0329797Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" This invention relates to a tape rewinding device used, for example, for rewinding a videotape.

``Prior Art'' A video tape recorder has a structure that records and plays back only in one direction on a tape. For this reason, when a tape on which content has been recorded continuously over multiple volumes is played back sequentially, if the played tape is rewound each time, the playback of the content will be interrupted, so when one tape ends, In this case, the tape is removed from the playback device without being rewound, and the next tape is played back.

In such cases, it is convenient to have a dedicated tape rewind machine.

This invention proposes a device exclusively for tape rewinding.

``Problems to be Solved by the Invention'' When constructing a tape rewinding device, it is required to automatically stop the motor when the tape is pulled out from the cassette and when the tape is rewound.

This invention is characterized by the simple structure of a mechanism for pulling out the tape from the cassette and a mechanism for automatically stopping the motor.

``Means for Solving the Problems'' The tape rewinding device according to this invention includes: A. first and second tape pull-out levers rotatably attached to the board; B. These first and second tape pull-out levers , first and second tape guide rollers that are implanted at one end of each tape guide roller, which are located inside each other in a state that is substantially parallel to the arrangement direction, and are led out to the opposite surface of the substrate through a long hole formed in the substrate. (C) A crank rotatably provided between the mounting positions of the first and second tape pull-out levers, and (D) one end of each of which is pivotally connected to the crank at a position approximately equal distance from the shaft fulcrum position of the crank. , first and second links whose other ends are respectively axially connected to the other ends of the first and second tape pull-out levers; A tension spring whose one end is fixed on a line perpendicular to the tying direction and whose other end is attached to one rotating end of the crank; an operator that rotates the crank so as to move it from one side of the line connecting the shaft fulcrum to the other end; When it is rotated so that it is turned on in relation to this rotation,
and a switch that is turned off when the first and second tape pull-out levers are substantially parallel to the arrangement direction thereof.

"Operation" The tape rewinding device according to this invention rotates the crank by manual operation, for example, rotates the first and second tape pull-out levers substantially perpendicular to the direction in which they are arranged, and removes one end of each of them. The first and second tape guide rollers installed in the tape guide rollers are driven in a direction away from each other. This drive causes the tape guide roller to pull out the tape from the cassette to the outside. By pulling out the tape from the cassette, the tape is unlocked and can be rewound. In conjunction with this rotation, the switch is turned on. At this time, the rotational biasing force of the crank generated by the tension spring maintains the switch in the on state. As a result, the motor drives the rewind side reel and rewinds the tape.

When tape rewinding is completed, tape tension is applied between the first and second tape guides. The crank rotates against the biasing force of the tension spring due to the tension of the tape, and when the rotation angle of the crank exceeds the critical point of the tension spring, the direction of rotational bias of the crank is reversed, and the switch is turned off and the motor is stopped. .
At the same time, the first and second tape pull-out levers rotate in a direction substantially parallel to the arrangement direction thereof, that is, in a direction in which the tape guide rollers approach each other, and the tape is stored in the cassette.

"Embodiment" An embodiment of this invention is shown in FIGS. 1 to 3. FIG. 1 shows a state in which the tape rewinding device according to this invention starts rewinding. FIG. 2 is a front view of the tape rewinding state, and FIG. 3 is a front view of the tape rewinding state.

In the figure, 1 indicates a substrate. 1 and 2 show views from the back side of the substrate. As shown in FIG. 3, this board 1 is attached to the upper surface of a case 2 housing a drive motor and the like. Reference numeral 3 shown in FIG. 3 is a cassette containing tape. Although not particularly shown, the cassette 3 has a lid on the surface from which the tape 4 is pulled out, and when the lid is closed, the rotation of the reel is locked and the movement of the tape is restricted. When the cassette 3 is placed on the board 1, the pin 5 is inserted into the cassette 3. pin 5
By inserting the , the lid is unlocked and opened. By opening the lid, the tape 4 is unlocked and the tape 4 is allowed to move. The structure up to this point is the same as that of a normal VTR cassette.

6 and 7 indicate reel drive stands. A motor 8 is connected to the reel drive base 7, and the tape 4 is rewound by the motor 8. The rewinding operation is started by pushing the operator 9 into the case 2. The operator 9 includes first and second tape pull-out levers 11A and 11B rotatably attached to the back side of the board 1.
connected to.

In other words, the first and second tape pull-out levers 11A, 1
1B is rotatably supported by a shaft 12, and each of the first and second tape pull-out levers has a tape guide roller 13 at one end thereof which is located inside each other in a state in which the first and second tape pull-out levers are substantially parallel to the arrangement direction. Can be mounted rotatably. The tape guide roller 13 is led out to the front side of the substrate 1 through a long hole 14 formed in the substrate 1, and the tape guide roller 13 is inserted into the inside of the cassette 3 when the cassette 3 is mounted.

The other ends of the tape pull-out levers 11A and 11B are each axially connected to one end of the first and second links 15,
The other ends of the first and second links 15 are each axially connected to a crank 16 at two substantially equal positions from its fulcrum, and when the crank 16 rotates, the first and second tape pull-out levers 11A, 11B are connected to each other. The structure is such that they interlock with each other and rotate in opposite directions. In this example, the operator 9 is connected to one end of the tape pull-out lever 11B. A rotation biasing force is applied to one end of the crank 16 by a tension spring 17. The tension spring 17 has one end locked to a pin 18 located on a line L that passes through the fulcrum of the crank 16 and is orthogonal to a line connecting the fulcrum positions of the first and second tape pull-out levers 11A and 11B. and connect the other end to the crank 16
Attach to one end of.

19 indicates a switch. This switch 19 works as a switch that turns the motor 8 on and off. This switch 19 is off in the state shown in FIG. 1, and is turned on by pushing the operator 9 into the state shown in FIG. This on state is the tension spring 1
This is maintained by the rotational biasing force exerted by the crank 7 on the crank 16 until the rewinding of the tape 4 is completed.

"Operation of the embodiment" Normally the first and second tape pull-out levers 11A, 11
B is in a standby state in which the first and second tape guide rollers 13 are close to each other. In this state, the cassette 3 is mounted so as to be engaged with the reel drive bases 6 and 7, so that the pin 5 is inserted into the cassette 3 and the lid of the cassette 3 is unlocked.

By pushing in the operator after installing the cassette,
In this example, the crank 16 is connected via the second link 15.
Rotate to get the state shown in Figure 2. In the state shown in FIG. 2, the first and second tape pull-out levers 11A and 11B
In this case, the first and second tape guide rollers 13 rotate in a direction away from each other, and the first and second tape guide rollers 13 rotate in a direction that separates from each other.
The tape pull-out levers 11A and 11B are substantially perpendicular to each other. As a result, the first and second tape guide rollers 13
The lid of the cassette 3 is opened, the tape is released from the locked state, and the tape 4 is pulled out from the cassette so that the tape 4 can run. Furthermore, the switch 19 is driven by the rotation of the first tape pull-out lever 11A and turned on, driving the motor 8 and performing an operation of rewinding the tape 4. The state shown in FIG. 2 is maintained by the biasing force of the tension spring 17.

When the tape 4 is completely rewound, tension is applied to the tape 4. This tension is applied to the first and second tape guide rollers 13 and, via the first and second links 15, applies a biasing force in the clockwise direction to the crank 16 in the state shown in FIG. Due to this biasing force, crank 1
6 rotates clockwise, and when the line L crosses even slightly from one side to the other, the direction of rotation bias of the crank 16 by the tension spring 17 is reversed, and the crank 16 rapidly rotates clockwise, as shown in FIG. Return to state. By returning to the state shown in FIG. 1, the first and second tape guide rollers 13 return to the inside of the cassette 3, and the tape 4 is returned to the inside of the cassette 3. At the same time, the switch 19 is turned off and the drive of the motor 8 is stopped.

In the above description, the switch 19 is driven directly by the rotation of the first tape pull-out lever 11A, but it may also be driven by the rotation of the crank 16, for example.
The switch 19 may be operated in conjunction with the rotation of A and 11B.

"Effects of the Invention" As described above, according to this invention, it is possible to provide an inexpensive tape rewinding device with a simple structure and less trouble. Furthermore, since it has a function of stopping the drive of the tape in conjunction with tape rewinding, it is possible to provide a tape rewinding device that can be used safely without fear of damaging the tape 4.

[Brief explanation of the drawing]

1 and 2 are rear views showing an embodiment of this invention, and FIG. 3 is a front view of the tape rewinding device according to this invention. 1: Board, 2: Case, 3: Cassette, 4: Tape, 5: Pin, 6, 7: Reel drive stand, 8: Motor, 9: Operator, 11A, 11B: 1st, 2nd
Tape drawer lever, 12: shaft, 13: first, second
Tape guide roller, 14: long hole, 16: crank, 17: tension spring, 19: switch.

Claims (1)

[Scope of Claim for Utility Model Registration] A. First and second tape pull-out levers rotatably attached to the board; B. These first and second tape pull-out levers are substantially parallel to the direction in which they are arranged. C. first and second tape guide rollers that are implanted at one end of each inner side of the substrate and guided to the opposite surface of the substrate through a long hole formed in the substrate; A crank is rotatably provided in the middle of the mounting position of the lever; 2. The first and second links are each axially connected to the other end of the tape pull-out lever, and E. A tension spring having one end fixed to F and the other end attached to one rotating end side of the crank; an operator for rotating the crank so as to move it from one side of a line connecting G to the other; a switch that is turned on in relation to the rotation when the tape is rotated as shown in FIG. Return device.