JPH0724135B2 - Cassette loading device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cassette loading device having a cassette holder that accommodates a cassette having a lid and moves between a cassette insertion position and a cassette mounting position. is there.

[Prior Art] FIGS. 9 to 12 are shown in Japanese Utility Model Laid-Open No. 62-57951 as an example of a conventional cassette loading device, in which 40 is a cassette containing a magnetic tape,
40a is a lid biased in a closing direction by a spring (not shown) in the cassette 40, 41 is a cassette holder that stores the cassette 40 and moves between a cassette insertion position and a cassette mounting position, and 43 is a cassette holder. An opener biased in the counterclockwise direction by a spring (not shown) around a support shaft 42 at the lower part of the back of 41, 44 is an open pin implanted in the back of the deck base 45, and 46 is an open pin 44. Is a fixing piece provided in the vicinity of.

In the cassette loading device configured as described above, when the cassette 40 is inserted into the cassette holder 41, the cassette 40 is held by the cassette holder 41 by coming into contact with the tip of the slide lever (not shown). (See Figure 10).

After that, with a stronger force than when inserting the cassette 40
When is pushed in by hand, the slide lever comes into contact with a start switch (not shown), and the cassette 40 and the cassette holder 41 are integrally moved by the operation of the start switch to move horizontally to the back side of the deck base 45. And the lid
When 40a is located above the tip of the opener 43,
The opener 43 is rotated clockwise about the support shaft 42 against the elastic force of the spring, and the lid 40a is opened counterclockwise by a predetermined amount accordingly (see FIG. 11). After that, the cassette 40 and the cassette holder 41 are integrally moved downward, and the cassette 40 is mounted at a predetermined position. During the downward movement, the lid 40 abuts on the opener 43 and is opened by a predetermined amount.
a continues to abut the open pin 44 and becomes fully open (first
(See Figure 2). Also, when the cassette 40 is installed,
The tip of the opener 43 abuts on the fixed piece 46, and the rotation of the opener 43 is blocked.

[Problems to be Solved by the Invention] In the conventional cassette loading apparatus as described above, when the support shaft 42 of the opener 43 is provided at the upper rear side of the cassette holder 41 as shown in FIGS. 13 and 14. Due to the inconveniences described below, the spindle 42 of the opener 43 has to be provided at the lower portion on the back side of the cassette holder 41. In other words, while the opener 43 is opening the lid 40a, the tip of the opener 43 may be in contact with the lid 40a.
The lid 40a is not fully opened due to interference with a.

Therefore, the support shaft 42 of the opener 43 must be provided in the lower lower portion of the cassette holder 41, and therefore the drive mechanism of the opener 43 must be provided in the lower lower portion of the cassette holder 41. There is a problem in that the reduction of the area and the miniaturization of the device are hindered.

The present invention has been made to solve such a problem, and an object thereof is to obtain a cassette loading device that is useful for downsizing the device.

[Means for Solving the Problems] A cassette loading device according to the present invention is a link lever rotatably provided on a guide pin on a cassette holder located on the back side of the cassette holder and on the side away from the deck base. And an opening lever which has a claw portion for opening the lid, which is connected at the tip of the link lever.

[Operation] In the present invention, by rotating the link lever about the guide pin on the cassette holder, the opening lever rotates in conjunction with the link lever, and the lid is opened by the claw portion of the opening lever. To be done.

Embodiment An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an exploded perspective view of an essential part of a DAT (digital audio tape recorder) showing an embodiment of the present invention. In the figure, 1 is a cassette containing a magnetic tape, and 1a is a spring (not shown) in the cassette 1. The lid 2 urged in the closing direction by (2) stores the cassette 1 and moves between the cassette insertion position and the cassette mounting position,
Reference numeral 3 denotes a slide lever that moves by abutting on the tip portion of the cassette 1, reference numeral 4 denotes a frame having a U-shaped cross section provided outside the slide lever 3, and reference numeral 5 denotes a slide lever 3 movably attached to the lower surface of the frame 4. The slide plates 6a and 6b, which are overlapped with each other, are L formed on the front side of the side wall of the frame 4.
L-shaped first and second guide holes, 6c is a third guide hole formed at the rear of the side wall of the frame 4, and 7 is a lever guide having an opening hole 28 formed below the third guide hole 6c. Holes 8a and 8b are respectively provided on the front of both side walls of the cassette holder 2 so as to project respectively from the first and second guide holes 6a and 6b, and 8c is one side of the cassette holder 2. It is a third guide pin that is provided on the rear side of the wall and moves along the third guide hole 6c.

Reference numeral 13 is an arm gear that is provided on both outer sides of the frame 4 and rotates about a shaft 14. Reference numeral 15 is a play hole formed at the tip of the arm gear 13 and through which the first and second guide pins 8a and 8b pass, and 16 is an arm gear. A synchronous gear that meshes with 13 and drives the arm gear 13, and 17 is a synchronous shaft in which the synchronous gear 16 is fixed at both ends and is engaged with the open groove 18.

2 is a plan view of an essential part of FIG. 1, FIG. 3 is a side view of FIG. 2, and 19 is a release lever pivotally supported by a pivot 20 of the cassette holder 2 and having a link pin 21 and a claw portion 22, 23 is a link hole 24 through which the link pin 21 penetrates and a third guide pin
A link lever having a support hole 25 through which 8c penetrates and a lever guide pin 26 that moves along the lever guide hole 7, one end of 27 presses the base end of the link lever 23 and the other end thereof This is a spring that presses the base end of the cassette holder 2 and constantly urges the link lever 23 in the direction of arrow A in FIG.

Next, the operation of the DAT having the above configuration will be described. In the loading operation of the cassette 1, first, when the cassette 1 is inserted into the cassette holder 2, the cassette 1 comes into contact with the tip portion of the slide lever 3 and is held by the cassette holder 2.

At this time, the first and second guide pins 8a and 8b of the cassette holder 2 are respectively attached to the first and second guide holes.
The third guide pin 8c of the cassette holder 2 is located at the ends of the 6a and 6b, and is located at the end of the third guide hole 6c. Then, the third guide pin is attached to the cassette holder 2.
The link lever 23 connected via 8c has a link hole
The release lever 19 connected via the link pin 21 passing through 24 is positioned downward (see FIGS. 4 and 5).

After that, with a stronger force than when inserting the cassette 1, the cassette 1
When is pushed by hand, the slide lever 3 comes into contact with a start switch (not shown), the synchronous gear 16 is rotated by the operation of the start switch, the arm gear 13 meshed with the synchronous gear 16 is rotated, and the first and the first gears are rotated. The two guide pins 8a and 8b move along the first and second guide holes 6a and 6b, respectively, and the cassette 1 and the cassette holder 2 integrally move to the inner side of the frame 4.

At this time, the third guide pin 8c also moves to the third guide hole 6c.
The link lever 23, which is attached around the third guide pin 8c as the center of rotation, also moves to the inner side of the frame 4. When the link lever 23 moves, the relative position between the guide pin 8c and the lever guide pin 26 also changes due to the change in the vertical relative position between the third guide hole 6c and the lever guide hole 7, and the link lever 23 rotates in the same clockwise direction as the urging direction of the spring 27 with the third guide pin 8c as a spindle. Further, in association with the clockwise rotation of the link lever 23, the opening lever 19 rotates counterclockwise until the claw portion 22 of the opening lever 19 abuts on the end surface of the cassette holder 2, and the lid 1a is at a certain position. Only a fixed amount is released (see FIGS. 6 and 7).

Thereafter, the guide pins 8a and 8b shown in FIGS. 1 and 2 are moved downward along the first and second guide holes 6a and 6b, respectively, so that the cassette 1 and the cassette holder 2 are integrally lowered. The cassette 1 is moved and mounted in a predetermined position. During the downward movement, the lid 1a, which comes into contact with the claw portion 22 and is opened by a predetermined amount, continues to come into contact with the opening piece 29, and is in a fully opened state corresponding to FIG. 12 described above.

By the way, the urging force of the spring 27 that opens the lid 1a via the opening lever 19 causes the cassette 1 to close the lid 1a.
It exceeds the urging force of the inner spring, and the predetermined amount of opening of the lid 1a via the claw portion 22 is maintained. Therefore, it is not necessary to stick to the relative position between the third guide pin 8c in the third guide hole 6c and the lever guide pin 26 in the lever guide hole 7, and the third guide pin 8c and the lever guide pin are not necessary. Even if both 26 are located in the open hole 28,
The lid 1a is kept open by a predetermined amount.

When the cassette 1 is moved from the mounting position to the insertion position, the cassette 1, the cassette holder 2, and the slide lever 3 move in the opposite direction to the above. In addition, during the movement of the cassette 1, the link lever 23 is counteracted against the rotational force of the link lever 23 given in the clockwise direction by the spring 27.
Is forcibly rotated counterclockwise due to fluctuations in the relative positions of the third guide pin 8c in the third guide hole 6c and the lever guide pin 26 in the lever guide hole 7, and as a result, The opening lever 19 rotates clockwise around the pivot 20 to release the contact between the claw portion 22 and the lid 1a, and the lid 1a is closed by the urging force of the spring in the cassette 1 in the closing direction.

In the above embodiment, the cassette loading device
Although the DAT has been described, it goes without saying that the present invention can also be applied to an apparatus using a cassette containing a magnetic disk or an optical disk.

[Advantages of the Invention] As described above, the cassette loading device of the present invention rotates the link lever about the guide pin on the cassette holder at the back side of the cassette holder and away from the deck base. , The opening lever rotates in conjunction with the link lever, and the claw portion of the opening lever opens the lid.
For example, there is an effect that another drive mechanism or the like can be disposed in a space on the deck base in the downward direction of the guide pin for effective use, and the device can be downsized.

[Brief description of drawings]

1 is an exploded perspective view of an essential part showing an embodiment of the present invention, FIG. 2 is a plan view of the essential part of FIG. 1, FIG. 3 is a side view of FIG.
FIGS. 4 to 8 are side views showing the positional relationship between the link lever, the opening lever and the lid shown in FIG. 1, and FIGS. 9 to 12 are main parts showing an example of each usage mode of the conventional cassette loading apparatus. Side views, FIG. 13 and FIG. 14 are side views of essential parts showing another example of a conventional cassette loading device. In the figure, 1 is a cassette, 1a is a lid, 2 is a cassette holder, 8c is a third guide pin, 19 is a release lever, 22
Is a claw portion, and 23 is a link lever. In each drawing, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Claims] 1. A cassette loading device having a cassette holder for accommodating a cassette having a lid and moving between a cassette insertion position and a cassette mounting position, the side being at the back side of the cassette holder and away from the deck base. A guide lever on the cassette holder located at the position rotatably provided, and an opening lever having a claw portion connected at the tip of the link lever for opening the lid, A cassette loading device characterized in that the link lever is rotated about a pin, and the lid is opened by the claw portion of the opening lever that rotates in conjunction with the link lever.