JPH0689482A - Cassette loader - Google Patents

Abstract

PURPOSE:To share a switching element for detecting a cassette holder to be at a loading start position with a switching element for detecting a faulty erasure preventing lug. CONSTITUTION:A loading start position and faulty erasure prevention detecting lever 41 is provided with an extension part 45 to be in contact with a lever 22 when the cassette holder 31 is in the loading start position, while a tip of an erection part 46 is provided with a claw part 47 to be in contact with the faulty erasure preventing lug of a video cassette. The other end side of the loading start position and faulty erasure prevention detecting lever 41 can be detected in the direction from the front by a switch 12 with its operation part 12a. Thus, by the loading start position and faulty erasure prevention detecting lever 41 and the switch 12, the switching element for detecting the cassette holder in the loading start position and the switching element for detecting the faulty erasure preventing lug can be shared with each other.

Description

Detailed Description of the Invention

[Object of the Invention]

[0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cassette loading device in a recording / reproducing device using a tape cassette.

[0003]

2. Description of the Related Art Conventionally, a video tape recorder (VT
R), digital audio tape recorder (DAT)
In a recording / reproducing apparatus such as a tape cassette, the tape cassette is accommodated in a cassette holder through a cassette insertion slot, horizontally conveyed toward the inside of the apparatus, and then vertically downward, and the cassette is placed on a predetermined reel stand. Put it on and finish loading the cassette. On the other hand, when ejecting the loaded cassette, the cassette is conveyed vertically upward from a predetermined reel stand, then horizontally conveyed toward the cassette insertion port, and then ejected from the cassette insertion port.

In such a conventional cassette loading apparatus, a switch for detecting whether or not the cassette holder is at the loading start position and a switch for detecting the erroneous erasure prevention claw of the tape cassette at the loading completion position are provided. ing.

FIG. 4 is an exploded perspective view of essential parts showing a conventional cassette loading device used for such a VTR.

In FIG. 4, the cassette loading device 61 is
Left and right side frames 81 (right side not shown) are attached to the base substrate 71 by screwing and fixing with a screw 80, and a cassette holder 91 for accommodating a tape cassette is supported between the left and right side frames 81 to draw in, eject, and move up and down. It is possible to move. Further, inside the left and right side frames 81, left and right levers 82 (right side not shown) for applying power of a drive motor to the cassette holder 91 are rotatably provided. Further, the right side frame 81 is provided with a switch 83 for detecting whether or not the cassette holder 91 is at the loading start position. The base board 71 is provided with a switch 72 for detecting the erroneous erasure prevention claw of the tape cassette at the loading completion position.

More specifically, the cassette holder 91 has pins 92 and 93 projecting from the front and rear sides of the side surface. These pins 92 and 93 are attached to the side frame 81.
It is adapted to be engaged with L-shaped grooves 84 and 85 provided in the. As a result, the cassette holder 91 moves horizontally (retracting movement) when moving from the loading start position to the loading completion position when inserting the cassette, and vertically moves when moving from the loading completion position to the loading start position when ejecting the cassette. Move horizontally from.

One end of each of the left and right levers 82 has a cutout 8
6 is formed. The pin 92 is adapted to be inserted into the cutout portion 86. The other ends of the left and right levers 82 are connected to the rotary shaft 87. The rotary shaft 87 is inserted into through holes formed in the left and right side frames 81, and the power of the drive motor is applied to the rotary shaft 87.

A switch 83 is provided above the front side of the mounting position of the rotary shaft 87 of the side frame 81.
The switch 83 is configured to detect that the cassette holder 91 is at the loading start position when the operating portion 83a is pressed by the lever 82.

On the other hand, the base substrate 71 is provided with an erroneous erasure prevention detection lever 74. The erroneous erasure prevention detection lever 74 is rotatable about a rotation shaft 75. The standing portion 7 is provided at one end of the erroneous erasure prevention detection lever 74.
6 is provided, and a claw portion 77 that comes into contact with an erroneous erasure prevention claw of a video cassette, which will be described later, is provided at the tip of the standing portion 76. One end of a coil spring 78 is attached between the erected portion of the erroneous erasure prevention detection lever 74 and the rotary shaft 75. The other end of the coil spring 78 is attached to a mounting portion 79 provided upright on the base substrate 71. Accidental erasure prevention detection lever 74
The coil spring 78 urges the claw portion 77 inward. The switch 72 is operated by the operation unit 72a.
The other end of the erroneous erasure prevention detection lever 74 can be detected from the front direction.

Although not shown, the cassette loading device 61
Is also provided with a loading completion detecting means for detecting that the cassette holder 91 is at the loading completion position by rotating the reel or the like.

5 and 6 show the cassette loading device 6 of FIG.
1 is an assembled perspective view, FIG. 5 shows a case where the cassette holder 91 is at a loading start position, and FIG. 6 shows a case where the cassette holder 91 is at a loading completion position.

As shown in FIG. 5, the cassette loading device 61.
In the assembled state, when the cassette holder 91 is at the loading start position, the lever 82 contacts the operating portion 83a of the switch 83, so the switch 83 is turned on. On the other hand, the erroneous erasure prevention detection lever 74 has a claw portion 77.
Since it is not in contact with anything at all, the other end is in contact with the operation portion 72a of the switch 72, and the switch 72 is turned on. The control circuit of the VTR detects that the cassette holder 91 is at the loading start position because the switch 83 is on.

In this state, when the user pushes the tape cassette into the insertion opening formed in the cabinet of the VTR cassette, the tape cassette is stored in the cassette holder 91 through the cassette insertion opening, and the cassette holder 91 slides inward. To do. As a result, the lever 82 rotates in the direction A in the figure, and the lever 82 no longer contacts the operating portion 83a of the switch 83, so that the switch 83 is turned off. As a result, the lever 82 of the control circuit is
The drive motor is rotated so as to rotate in the direction, and the cassette holder 91 accommodating the tape cassette has L-shaped grooves 84, 8
After being conveyed horizontally toward the inside of the device along 5,
The tape cassette is conveyed vertically downward, and the tape cassette is placed on a predetermined reel stand to complete the cassette loading.

When loading is completed, as shown in FIG. 6, when the erroneous erasure prevention claw 95 of the tape cassette 94 is not folded, the erroneous erasure prevention detection lever 74 has the claw portion 77 with the erroneous erasure prevention claw 95. Since it abuts against, it is in a state of being rotated in the B direction in the figure as compared with FIG. As a result, the other end of the erroneous erasure prevention detection lever 74 does not come into contact with the operation portion 72a of the switch 72, so that the switch 72 is in the off state. On the other hand, the loading completion detecting means detects that the loading is completed. The control circuit of the VTR confirms that both recording and playback are possible, and when the record button is pressed,
Recording (recording) video signals on the tape of the tape cassette 94
If the play button is pressed, the tape is played.

On the other hand, when the erroneous erasure prevention claw 95 of the tape cassette 94 is folded in the loaded state, the claw portion 77 has a concave portion of the tape cassette 94 from which the erroneous erasure prevention claw 95 is removed. Since the erroneous erasure prevention detection lever 74 is inserted into the switch 96, the other end of the erroneous erasure prevention detection lever 74 is the operation portion 7 of the switch 72.
2a is contacted and the switch 72 is turned on. With this, the control circuit confirms that the reproduction is possible but the recording is impossible. When the reproduction button is pressed, the tape is reproduced, and when the recording button is pressed, The tape cassette 94 is rotated by rotating the drive motor in the opposite direction to the case of loading.
To the loading start position.

In such a conventional cassette loading device 61, the switch 83 can detect that the cassette holder 91 is at the loading start position, and the switch 72 can detect the erroneous erasure prevention claw 95. However, since such switches 72 and 83 use contacts made of expensive metal, it is difficult to reduce the manufacturing cost, and the cassette loading device 61 has a cord for connecting these switches to the control circuit. And, it is difficult to reduce the manufacturing cost of equipment using the same.

[0018]

In such a conventional cassette loading apparatus, a switching element for detecting that the cassette holder is at the loading start position and a switching element for detecting the erroneous erasure prevention claw are individually provided. ing. Since the contacts made of expensive metal are used for these switching elements, it is difficult to reduce the manufacturing cost, and the cords of these switches reduce the manufacturing cost of the cassette loading device and the equipment using the cassette loading device. Was difficult.

Therefore, an object of the present invention is to provide a cassette loading device which can be used both as a switching element for detecting that the cassette holder is at the loading start position and a switching element for detecting the erroneous erasure prevention claw.

[Structure of Invention]

[0021]

A cassette loading apparatus according to the present invention is a cassette loading apparatus for moving a tape cassette inserted from a cassette insertion port in a horizontal direction and a vertical direction and mounting the tape cassette on a reel stand. And a pair of side frames for guiding the cassette holder between the cassette loading start position and the completion position, and when the cassette holder is at the loading start position, the cassette holder is rotated in a predetermined direction, When the cassette holder holding the tape cassette with the erroneous erasure prevention claw not folded is in the loading completion position, the detection lever comes into contact with the erroneous erasure prevention claw and is rotated in a predetermined direction. And a switching element that operates.

[0022]

With this configuration, when the cassette holder is at the loading start position, the detection lever is rotated in the predetermined direction, the switching element is turned on or off, and the cassette holder is at the loading completion position. If the erroneous erasure prevention claw is not folded in, the detection lever is rotated in the specified direction and the switching element is turned on or off.
The switching element that detects that the cassette holder is at the loading start position and the switching element that detects the erroneous erasure prevention claw can be used together.

[0023]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is an exploded perspective view of essential parts when an embodiment of a cassette loading apparatus according to the present invention is applied to a VTR.

In FIG. 1, the cassette loading device 1 is provided with a loading start position and an erroneous erasure prevention detection lever 41, and a switch 12 for detecting the rotation of the loading start position and the erroneous erasure prevention detection lever 41, so that the loading start position The detection and the erroneous erasure prevention claw are detected.

In the cassette loading device 1, the left and right side frames 21 (right side not shown) are attached to the base substrate 11,
A cassette holder 31 for accommodating a tape cassette is supported between the left and right side frames 21 so that the cassette holder 31 can be retracted, ejected, and moved up and down. Further, inside the left and right side frames 21, left and right levers 22 (right side not shown) for applying power of a drive motor to the cassette holder 31 are rotatably provided.

More specifically, the cassette holder 31 has pins 32 and 33 projecting from the front and rear sides of the side surface. These pins 32 and 33 are attached to the side frame 21.
It is adapted to be engaged with L-shaped grooves 24 and 25 provided in the. As a result, the cassette holder 31 moves horizontally (retracting movement) when moving from the loading start position to the loading completion position when inserting the cassette, and vertically moves when moving from the loading completion position to the loading start position when ejecting the cassette. Move horizontally from.

One end of each of the left and right levers 22 has a cutout 2
6 is formed. The pin 32 is adapted to be inserted into the cutout portion 26. The other ends of the left and right levers 22 are connected to the rotary shaft 27. The rotary shaft 27 is inserted into through holes formed in the left and right side frames 21, and the power of the drive motor is applied to the rotary shaft 27.

Below the side frame 21, a bent portion 28 is formed by being bent inward, and a through hole 29 into which the screw 20 is inserted is formed in the bent portion 28.

On the other hand, a screw hole 13 is formed in the base substrate 11, and the screw 20 inserted in the through hole 29 is
It is adapted to be screwed into the screw hole 13. As a result, the side frame 21 is screwed and fixed to the base substrate 11.

The base substrate 11 is provided with a loading start position and an erroneous erasure prevention detection lever 41. The loading start position and the erroneous erasure prevention detection lever 41 are rotatable around a rotation shaft 42. A first standing portion 43 is provided at the loading start position and one end of the erroneous erasure prevention detection lever 41.
Is provided. Above the first standing portion 43, a step portion 44 is formed laterally. On the upper side of the step portion 44, an extending portion 45 that comes into contact with the lever 22 when the cassette holder 31 is at the loading start position is provided laterally. A second upright portion 46 is provided between the first upright portion 43 and the rotary shaft 42, and a claw portion 47 that comes into contact with the erroneous erasure prevention claw of the video cassette is provided at the tip of the upright portion 46. ing. An upright portion and one end of the coil spring 18 are attached between the loading start position and the erroneous erasure prevention detection lever 41 and the rotary shaft 42. The other end of the coil 18 spring has the base substrate 11
It is attached to a mounting portion 19 which is erected upright. The loading start position and the erroneous erasure prevention detection lever 41 are arranged in the coil spring 18
Thereby, the extending portion 45 and the claw portion 47 are biased inward. The switch 12 can detect the loading start position and the other end side of the erroneous erasure prevention detection lever 41 from the front direction by the operation unit 12a.

Although not shown, the cassette loading apparatus 1 is also provided with a loading completion detecting means for detecting that the cassette holder 31 is at the loading completion position by the rotation of the reel or the like.

2 and 3 show the cassette loading device 1 of FIG.
2 is a perspective view of the assembled state, FIG. 2 shows a case where the cassette holder 31 is at a loading start position, and FIG. 3 shows a case where the cassette holder 31 is at a loading completion position.

As shown in FIG. 2, when the cassette loading device 1 is assembled, when the cassette holder 31 is at the loading start position, the lever 22 is at the loading start position and the extension portion of the erroneous erasure prevention detection lever 41. Since 45 is pushed toward the front of the apparatus, the loading start position and the erroneous erasure prevention detection lever 41 are at the angle at which the other end does not abut the operating portion 12a of the switch 12, and the switch 12 is in the off state. On the other hand, the loading completion detecting means does not detect that the loading is completed. Thereby, the control circuit of the VTR detects that the cassette holder 31 is at the loading start position.

From this state, when the user pushes the tape cassette into the insertion opening formed in the cabinet of the VTR cassette, the tape cassette is stored in the cassette holder 31 through the cassette insertion opening, and the cassette holder 31 slides inward. To do. As a result, when the lever 22 rotates in the direction C in the figure, the loading start position and the erroneous erasure prevention detection lever 41 rotate in the direction D in the figure, and the lever 22 no longer contacts the extension portion 45, and the loading start position The other end of the erroneous erasure prevention detection lever 41 presses the operating portion 12a of the switch 12, and the switch 12 is turned on. As a result, the control circuit rotates the drive motor so that the lever 22 rotates in the direction C in the figure, and the cassette holder 31 containing the tape cassette is horizontally conveyed along the L-shaped grooves 24 and 25 toward the inside of the apparatus. Then, the tape cassette is conveyed vertically downward, the tape cassette is placed on a predetermined reel stand, and the cassette loading is completed.

When the loading is completed, as shown in FIG. 3, when the erroneous erasure prevention claw 35 of the tape cassette 34 is not folded, the loading start position and the erroneous erasure prevention detection lever 41 are provided.
Since the erroneous erasure prevention claw 35 comes into contact with the claw portion 47 of, the loading start position and the erroneous erasure prevention detection lever 41 are rotated by an angle such that the other end does not abut the operation portion 12a of the switch 12.
The switch 12 is turned off. On the other hand, the loading completion detecting means detects that the loading is completed. This gives V
The TR control circuit confirms that both recording and reproduction are possible. When the recording button is pressed, the video signal is recorded on the tape of the tape cassette 34, and when the reproduction button is pressed. In this case, the tape is reproduced.

On the other hand, when the erroneous erasure prevention pawl 35 of the tape cassette 34 is folded in the loaded state, the lever 22 is no longer in contact with the extension portion 45, so the pawl portion 47 is The erroneous erasure prevention claw 35 is inserted into the recessed portion 36 of the tape cassette 34 from which the other end of the loading start position and the erroneous erasure prevention detection lever 41 is the switch 12.
The switch 12 is brought into the ON state by abutting on the operation portion 12a. On the other hand, the loading completion detecting means detects that the loading is completed. With this, the control circuit confirms that the reproduction is possible but the recording is impossible. When the reproduction button is pressed, the tape is reproduced, and when the recording button is pressed, The drive motor is rotated in the opposite direction to the case of loading to move the tape cassette 34 to the loading start position.

According to such an embodiment, when the cassette holder 31 is at the loading start position, the loading start position and the erroneous erasure prevention detection lever 41 are rotated in a predetermined direction, and the switch 12 is turned on. On the other hand, when the erroneous erasure prevention claw is not folded at the loading completion position, the loading start position and the erroneous erasure prevention detection lever 41 are rotated in a predetermined direction, and the switch 12 is turned on. In other cases, the switch 12 is turned off. As a result, the switch for detecting that the cassette holder is at the loading start position and the switch for detecting the erroneous erasure prevention claw can be used as a switch, which reduces the number of switches and the number of cords connected to the switches. This is useful and can reduce the manufacturing cost of the cassette loading device.

Although the embodiment of FIG. 1 is applied to the VTR, a device using another cassette loading device, for example, DAT.
Etc. may be used.

[0040]

As described above, according to the present invention, the switching element for detecting that the cassette holder is at the loading start position and the switching element for detecting the erroneous erasure prevention claw can be used in combination. This helps reduce the number of switching elements and the number of cords connected to the switching elements, and can reduce the manufacturing cost of the cassette loading device.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an embodiment of a cassette loading device according to the present invention.

FIG. 2 is a perspective view showing a cassette loading device when the cassette holder of FIG. 1 is at a loading start position.

FIG. 3 is a perspective view showing a cassette loading device when the cassette holder of FIG. 1 is at a loading completion position.

FIG. 4 is an exploded perspective view showing a conventional cassette loading device.

5 is a perspective view showing a cassette loading device when the cassette holder in FIG. 4 is at a loading start position.

FIG. 6 is a perspective view showing a cassette loading device when the cassette holder of FIG. 4 is at a loading completion position.

[Explanation of symbols]

 1 cassette loading device 11 base substrate 12 switch 21 side frame 22 lever 31 cassette holder 41 loading start position and erroneous erasure prevention detection lever

Claims (1)

[Claims] 1. A cassette loading device for moving a tape cassette inserted from a cassette insertion port in a horizontal direction and a vertical direction and mounting the tape cassette on a reel stand, wherein a cassette holder for storing the tape cassette and a cassette loading start position are provided. A pair of side frames that guide the cassette holder between the completion position and a tape cassette that is rotated in a predetermined direction when the cassette holder is at the loading start position and the erroneous erasure prevention claws are not folded. When the held cassette holder is in the loading completion position, it is equipped with a detection lever that comes into contact with the erroneous erasure prevention claw and rotates in a predetermined direction, and a switching element that is turned on and off by the rotation of the detection lever. Cassette loading device.