JPH07114049B2 - Cassette mounting device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a front loading type cassette mounting device in a cassette type magnetic recording / reproducing device.

2. Description of the Related Art In recent years, a cassette loading device of a cassette tape recording / reproducing device such as a video tape recorder (VTR) is mainly a front loading type in which a cassette tape is loaded from the front side.

Hereinafter, with reference to the drawings, an example of a conventional cassette mounting device, which is not publicly known and is not improved, will be described.

FIG. 11 shows the structure of a conventional cassette mounting device which is not known. In FIG. 11, 1 is a cassette holder, 2a and 2b are side walls integrally formed on both sides of the cassette holder 1, 3a and 3b are guide pins provided on the side walls 2a and 2b, and 4
a and 4b are side plates arranged on both sides of the cassette holder 1, and 5a and 5b are L-shaped guide grooves provided on the side plates 4a and 4b, each of which is composed of two or three guide pins.
3a and 3b are engaged with each other. 6a and 6b are drive arms that are connected by a shaft 7 and are rotatably supported by the side plates 4a and 4b. The guide arms 8a and 8b provided at the tips of the drive arms are provided on the side wall members 2a and 2b of the cassette holder 1. The guide pins 3a and 3b are engaged with each other. A gear 9 is formed integrally with one of the drive arms 6a, 6 concentrically with the shaft 7. Reference numeral 10 denotes a first flank having a guide groove formed so as to be horizontally movable by being fitted to two guide pieces 11a, 11b provided on the side plates 4a, 4b, and one end thereof is integrated with the drive arm 6b. And several teeth 12 that mesh with the gear 9 of FIG. 13 is the second rack,
Similar to the first rack 10, the second rack 13 and the first rack 10 have guide grooves 11a and 11b provided on the side plates 4a and 4b, respectively, and have guide grooves for horizontal movement. They are connected to each other by a tension spring 14 engaged with a spring hook portion provided on the. One end of the second rack 13 has some teeth 15 which are in phase with the teeth 12 provided on the first rack 10 but have a small number of teeth, and the other end bent into an L-shape. The drive arm 6b has a tooth 15 formed over the same length as the tooth region of the first rack 10 at a position where it does not mesh with the one gear 9. Reference numeral 22 (see FIGS. 12 to 15) is an output gear provided on the magnetic recording / reproducing apparatus main body, and when the cassette mounting apparatus is attached to this main body, the output gear is in phase with the second rack 13 in advance. It is to be meshed with the tooth 16. The second rack 13 is formed with a rectangular long hole 17, into which the bending member 18 formed in the first rack 10 is fitted, and normally abutted against each other by the tension spring 14. At the position, the guide grooves 11a, b formed on the side plates 4a, 4b are in phase with each other to be fitted in the guide grooves, and the rectangular holes 17 of the second rack 13 and the bending members 18 of the first rack 10 are aligned with each other. Are configured so that they can slide with respect to each other only in the space region.

The operation of the conventional non-known cassette mounting device configured as described above will be described below.

FIG. 12 shows a state before the cassette is inserted. FIG. 13 shows a state in which the cassette tape 21 is stored in the cassette holder 1, the cassette holder 1 is further pushed in, the cassette in switch 19 operates, and the rotation of the output gear 22 starts. That is, the second rack 13 meshing with the output gear 22 is in the state shown in the figure, but the first rack 10 meshing with the gear 9 integral with the drive arm 6b moves horizontally with respect to the tension spring 14. To do.

FIG. 14 shows a state in which the cassette-in switch 19 operates and the cassette mounting operation is performed. The output gear 22 starts to rotate, and the second rack 13 meshing with the output gear 22 moves horizontally in the direction of arrow a, but the wall of the square hole 17 is the bending member 18 of the first rack 10.
Drive arm 6b engaged with the second rack 13 is rotated in the direction of the arrow b, and the cassette holder 1 engaged with the drive arm 6b by the guide pin 3b.
Is an L-shaped guide groove 5a, 5b formed in the side plates 4a, 4b
Move horizontally and vertically along.

FIG. 15 shows a state in which the cassette tape 21 is completely attached to the predetermined position. At this point, the tooth 15 formed on one end of the second rack 13 and in phase with the tooth 12 provided on the first rack 10 meshes with the tooth 9 integral with the drive arm 6b.

12 to 15 in the ejecting operation of the cassette tape 21.
Each component as shown moves in the opposite direction to that during the mounting operation, but the vertical operation section is provided with teeth 15 on the second rack 13.
Meshes with the gear wheel 9 of the drive arm 6b, similar to the teeth 12 of the first rack 10.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, in the above-mentioned configuration, when the cassette tape is inserted into the cassette holder and is continuously pushed by hand until the cassette in switch 19 operates, the guide pin 3b and the drive arm 6b of the cassette holder. And the first rack 10 operates respectively. If the hand is released at that time, the tension spring works and the first rack 10, the drive arm 6b, and the guide pin 3b of the cassette holder return to their original positions. At this time, there is a problem that the cassette tape once inserted is ejected to the outside.

In view of the above problems, the present invention provides a cassette loading device that prevents the cassette tape from popping out by making the first rack immovable in the opposite direction even if it moves a little in a certain direction. Is.

Means for Solving the Problems In order to solve the above problems, the cassette mounting apparatus of the present invention is rotatable about an axis provided in a part of the first rack,
And if the first rack moves even a little in a certain direction,
Even if it is attempted to move in the opposite direction, it is equipped with a lock lever that engages with a plurality of teeth formed on a part of the side plate and cannot reversely move.

Effect of the Invention The present invention provides an excellent cassette loading device that improves the user's operational feeling by preventing the cassette tape from popping out at the initial stage of manual insertion by the above configuration.

Embodiment Hereinafter, a cassette mounting apparatus according to an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 shows the construction of a cassette mounting apparatus according to an embodiment of the present invention. In FIG. 1, 1 is a cassette holder
2a and 2b are side walls integrally formed on both sides of the cassette holder 1, 3a and 3b are guide pins provided on the side walls 2a and 2b, and 4a and 4b
Is a side plate arranged on both sides of the cassette holder 1,
Reference numerals 5a and 5b are L-shaped guide grooves formed on the side prints 4a and 4b, and are composed of two or three guide grooves, and guide pins 3a and 3b are engaged with the guide grooves 3a and 3b, respectively. 6a and 6b are connected by a shaft 7 and side plate
The main guide pins 3a, 3b on the side wall members 2a, 2b of the cassette holder 1 are engaged with the guide grooves 8a, 8b provided at the ends by the drive arms rotatably supported by a, 4b. On one side of the drive arms 6a, 6b, a gear 9 is integrally formed concentrically with the shaft 7. Reference numeral 10 denotes a first rack which has guide grooves formed so as to be horizontally movable by fitting with two guide pieces 11a, 11b provided on the side plates 4a, 4b, and one end of which is integrated with the drive arm 6b. It comprises a number of teeth 12 which mesh with the gear 9. Further, it has a shaft 24 which can be the center of rotation of the lock lever 24 for preventing reverse movement.

Reference numeral 13 denotes a second rack, which, like the first rack 10, is fitted to the guide pieces 11a, 11b provided on the side plates 4a, 4b, has a guide groove for horizontal movement, and has a second rack 13 The first rack 10 and the first rack 10 are connected to each other by a tension spring 14 engaged with a spring hook portion provided on each of them. One end of the second rack 13 has some teeth 15 which are in phase with the teeth 12 provided on the first rack 10 but have a small number of teeth, and the other end bent into an L-shape. , One gear 9 on the drive arm 6b
Has a tooth 15 formed over the same length as the area of the tooth formed on the first rack 10 at a position not meshing with.

The second rack 13 is formed with a rectangular long hole 17, into which the bending member 18 formed in the first rack 10 is fitted, and normally abutted against each other by the tension spring 14. At the position, the guide grooves 11a, 11b formed on the side plates 4a, 4b are fitted in the guide grooves in phase with each other, and the second rack 13
It is configured so that it can slide with respect to each other only in the space area between the square hole 17 and the bending member 18 of the first rack 10.

The operation of the cassette mounting apparatus configured as described above will be described below with reference to FIGS. 2 to 10.

FIG. 2 shows a state before the cassette tape 21 is inserted.

FIG. 3 shows a state in which the cassette tape 21 is stored in the cassette holder 1 and the cassette holder 1 is further pushed.
When the cassette holder 1 is continuously pushed, the drive arm 6b and the gear 9 engaged with the guide pin 3b of the cassette holder 1
Rotates in the direction of arrow c. Further, the first rack 10 meshing with the gear 9 moves in the direction of arrow d, but the second rack 13 does not move. At this time, when the hand is released, the cassette holder 1 tries to return to the direction of the arrow e by the force of the tension spring 14, but the tip of the lock lever 24 meshes with the plurality of teeth 23 provided on the side plate 4b, and Rack 10 will remain stopped. Then, the cassette-in switch (not shown) is activated, the output gear 22 starts to rotate, and the second rack 13 meshing with the output gear 22 moves in the direction of arrow d,
As shown in FIG. At this time, the lock lever 24 rotates in the direction of the arrow f and tries to fall off from the side plate 4b, but it does not fall off because it comes into contact with the first regulating member 26 provided on the first rack 10. .

FIG. 5 shows a state in which the cassette tape 21 is completely attached to the predetermined position. At this point, the lock lever 24 has completely passed through the plurality of teeth 23 provided on the side plate 4b, and is positioned above the teeth 23 by the first restricting member 26 and the spring 27.

FIG. 6 shows a state in which the cassette tape is being ejected. At this time, since the lock lever 24 moves the upper portions (arrows g) of the plurality of teeth 23, there is no problem in the discharging operation (see FIGS. 9 to 10).

7 to 10 show horizontal movement and vertical movement of the lock lever 24.

As described above, according to the present embodiment, by providing the first rack with the lock lever for preventing the reverse movement, the cassette tape does not come out and the user's operation feeling can be improved.

As described above, according to the present invention, the first rack is provided with the reverse movement preventing lock lever and the side plate provided with the plurality of teeth, so that the cassette tape is stopped during manual insertion. There is no problem that the cassette tape pops out at some time, and it is possible to obtain an extremely excellent effect that can improve the operational feeling of the user.

[Brief description of drawings]

FIG. 1 is a perspective view of a cassette mounting apparatus according to an embodiment of the present invention, FIGS. 2 to 6 are side views for explaining the operation of this embodiment, and FIGS. 7 to 10 are operation of a lock lever. FIG. 11 is a perspective view of a conventional cassette mounting device which is not known, and FIGS. 12 to 15 are side views for explaining the operation of the cassette mounting device shown in FIG. 1 ... Cassette holder, 3a, 3b ... Guide pin, 4a, 4b ...
… Side plates, 6a, 6b …… Drive arm, 10 …… First rack, 13 …… Second rack, 22 …… Output gear, 23 ……
A plurality of teeth, 24 ... Lock lever, 26 ... First restricting member, 28 ... Second restricting member.

Claims (1)

[Claims] 1. A cassette holding member for accommodating a cassette tape having a plurality of protrusions formed on side walls integrally provided on both sides, and a plurality of L-shaped guide grooves engaging with the protrusions of the cassette holding member. And a shaft rotatably supported by the side plate and engaging with at least one of the protrusions on both sides thereof and having arms each having a slidable guide groove fixed thereto. , A gear is integrally formed on one side of the arm concentrically with the shaft, and teeth are formed in a region that meshes with the gear to rotate the arm at least a certain angle, and a bend is formed in part And a first rack that is horizontally movable along a guide member that is provided on one side of the side plate, and an oblong hole that engages with the bent portion that is provided on the first rack, And the above Of the first rack and teeth that are movable along the guide member and mesh with a gear that is integral with the arm so that they can be slidably connected to each other by a tension spring. The second rack having teeth shorter than the area of 1 and a shaft provided on a part of the first rack, and the first rack moves in the opposite direction when the first rack moves a little in a certain direction. And a lock lever capable of moving backward when passing a plurality of teeth of the side plate, and engaging with a plurality of teeth formed on a part of the side plate to prevent backward movement. Cassette mounting device characterized by.