JPS63179454A - Cassette loading device - Google Patents

Abstract

PURPOSE:To prevent a cassette tape from being jumped out when the manual loading of the cassette tape is stopped by providing plural teeth to a side face plate and a reversing preventing lock lever to a 1st rack. CONSTITUTION:In loading a cassette, when the 1st rack 10 is moved in a direction (d) and a 2nd rack 13 cannot catch up therewith, since a pressing part 13a does not depress a lock release lever 26, no torque of the lock lever 24 in a direction (f) is caused. The locking lever 24 is driven in the direction of arrow (g) while being abutted on a slope face (i) and is going to be fallen down from the side face plate, but does not fall down because the lever is abutting on a 1st regulating member 30 provided to the 1st rack 10. Then the lever goes up the slope face (i) and overrides the upper part (h) of the plural teeth and does not mesh with them.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a front-loading type cassette mounting device in a cassette type magnetic recording/reproducing device.

BACKGROUND OF THE INVENTION In recent years, the mainstream of cassette loading devices for cassette tape recording and reproducing devices such as video tape recorders (VTRs) is the front loading type in which the cassette tape is loaded from the front.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An example of a conventional, unknown cassette mounting device before the improvement of the present invention will be described below with reference to the drawings.

FIG. 16 shows the configuration of a conventional cassette loading device. In Fig. 16, 1 is a cassette holder, 2N
, 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, 4a and 4b are side plates arranged on both sides of the cassette holder 1, and sa and sb are side walls arranged on both sides of the cassette holder 1. There are two or three L-shaped guide grooves provided on the side plates 4&, 4b, and the guide pins 31L, 3b are engaged with each other. ea and eb are connected by a shaft 7, and a side plate 4
The main guide pins 3a, 3b on the side wall members 2&, 2b of the cassette holder 1 are engaged with the guide grooves sa, sb provided at the tips of the drive arm rotatably supported by &, 4b, respectively. . A shaft 7 is attached to one side of the drive arms ea and eb.
A gear 9 is integrally formed concentrically with the . 10 is the first rack (side play) 41, two guide pieces 1 provided on 4b
1a.

It has a guide groove formed so that it can be horizontally moved by fitting into the drive arm 6b, and a number of teeth 12 are formed at one end thereof to mesh with a gear 9 integrated with the drive arm 6b. 13
is a second rack, which, like the first rack 10, fits into the guide pieces 11&, 11b provided on the side plates 41L, 4b, and has a guide groove so that it can be moved horizontally.
The rack 13 and the first rack 1o are connected to each other by a tension spring 14 that engages a spring hook provided on each of the racks 13 and 1o. One end of the second rack 13 is connected to the first rack 1
It has several teeth 16 with a small number of teeth, which are in phase with the teeth 12 provided on the drive arm 6b, and the other end bent into an L shape meshes with a gear 9 on the drive arm 6b. The first rack 1o has teeth 16 formed over the same length as the area of the teeth formed on the first rack 1o. 22 (Figures 17 to 20
(see figure) is an output gear provided in the main body of the magnetic recording/reproducing device, and when the cassette loading device is attached to this main body, it is meshed with the teeth 16 of the second rack 13 with the phase adjusted in advance. be. A rectangular elongated hole 17 is formed in the second rack 13, and the first rack 1
0 and the bending member 18 is fitted, and at the position where they are normally brought into contact with each other by the tension spring 14, the phases of the guide grooves fitted to the guide pieces 11a, b formed on the side plates 42L, 4b match. At the same time, the second rack 13
The space between the rectangular hole 17 of the first rack 10 and the bending member 18 of the first rack 10 is configured to be able to slide relative to each other.

The operation of the conventional cassette loading device configured as described above will be described below.

FIG. 17 shows the state before insertion of the cassette. FIG. 18 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 is activated, and the output gear 22 starts rotating. That is, the second rack 13 meshing with the output gear 22 is in the state shown in the figure, but the first rack 1o meshing with the gear 9 integrated with the drive arm 6b is horizontal against the tension spring 14. Moving.

FIG. 19 shows a state in which the cassette in switch 19 is activated to perform the cassette mounting operation. The output gear 22 begins to rotate, and the second rack 13 that meshes with the output gear 22 moves horizontally in the direction of arrow a, but the wall of the square hole 17 does not touch the first rack 1.
In order to push the bending member 18 of o, the second rack 13
The drive arm 6b, which is engaged with the drive arm 6b, is rotated in the direction of the arrow, and the cassette holder 1, which is engaged with the drive arm 6b through the guide pin 3b, is rotated from the side (41L).

Horizontal and vertical movement is carried out along the L-shaped guide grooves 51L and 5b formed in 4b.

FIG. 20 shows a state in which the cassette tape 21 has been completely installed in a predetermined position. At this point, the teeth 15 formed at one end of the second rack 13, which are in phase with the teeth 12 provided on the first rack 1°, mesh with the teeth 9 integral with the drive arm 6b.

In the ejecting operation of the cassette tape 21, FIGS.
Each component as shown in FIG. 20 moves in the opposite direction to the mounting operation, but in the vertical movement section, the teeth 16 on the second rack 13, as well as the teeth 12 on the first rack 1o, It meshes with the gear 9 of the drive arm 6b.

Problems to be Solved by the Invention However, in the above configuration, when a cassette tape is inserted into the cassette holder and the cassette in switch 19 is pressed by hand until it is activated, the guide pin 3b of the cassette holder and the drive arm 6b and first rack 1
o operate respectively. If you let go of your hand at that time, the tension spring will work and the first rack 10, drive arm 6b, and guide pin 3b of the cassette holder will return to their original positions. At this time, there was a problem in that the cassette tape once inserted was ejected.

In view of the above-mentioned problems, the present invention provides a cassette loading device in which if the first rack moves even slightly in a certain direction, it cannot move in the opposite direction, thereby preventing the cassette tape from flying out. be.

Means for Solving the Problems In order to solve the above problems, the cassette mounting device of the present invention is rotatable about a shaft provided in a part of the first rack,
And if the first rack moves even a little in a certain direction,
Even if you try to move in the opposite direction, the lock lever engages with a plurality of teeth formed on a part of the side plate and cannot be moved in the opposite direction, and the first and second racks move together in a fixed direction. The device is equipped with a lock release lever that releases the engagement of the lock lever when the user attempts to do so.

Although not shown in the diagram, the cassette loading device has a mechanism to protect the tape when the cassette tape is not inserted into the cassette holder to the correct position or when the cassette guard 7 is not opened properly. A safety mechanism is provided to prevent movement of the cassette holder to the recording or playback position.

If the safety mechanism and the lock lever to prevent reverse movement are both activated at the same time, the first rack will not be able to move in either direction. The present invention makes it possible to release the prevention of reverse movement of the lock lever even in such a case, and it is possible to freely select the range in which the lock lever can prevent reverse movement. Therefore, even if the cassette tape is pushed all the way in by hand, the cassette tape will not pop out, thereby providing an excellent cassette mounting device that improves the user's operating feeling.

EXAMPLE Hereinafter, a cassette mounting device according to an example of the present invention will be described with reference to the drawings.

FIG. 1 shows the configuration of a cassette loading device according to an embodiment of the present invention. In FIG. 1, 1 is a cassette holder 21L, 2b is a side wall 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 41L and 4b are on both sides of the cassette holder 1. The side plates 5a and 5b are the side plates 4a arranged in
, 4b are formed of two or three L-shaped guide grooves, and the guide bins sa and sb are engaged with each other. 61L and 6b are connected by a shaft 7, and the side plate 4a
The side wall member 2 of the cassette holder 1 is inserted into the guide grooves 8a and 8b provided at the tips of drive arms rotatably supported by the drive arms 4b and 4b.
The main guide pins 3a, 3b on a, 2b are engaged, respectively. A gear 9 is integrally formed on one side of the drive arms θm and csb, coaxially with the shaft 7. 1o is the first rack with two guide pieces 1 provided on the side plates 41L and 4b.
11L.

It has a guide groove formed so that it can be horizontally moved by fitting into the drive arm 6b, and has several teeth 12 at one end that mesh with the gear 9 integrated with the drive arm 6b. Axis 2 that can be the rotation center of the lock lever 24 that still prevents reverse movement
It is equipped with 6.

Reference numeral 13 designates a second rack, which, like the first rack 1o, has a guide piece 11a provided on the side plate 4&, 4b.

The second rack 13 and the first rack 1o have a guide groove so that the second rack 13 and the first rack 1o can be horizontally moved. connected.

One end of the second rack 13 is in phase with the teeth 12 provided on the first rack 1o, but there are several teeth 1 with a small number of teeth.
6, and the other end bent into an L shape has a drive arm 6.
The first rack 1 is placed in a position where it does not mesh with one gear 9.
It has teeth 16 configured over the same length as the area of the teeth configured in o.

A square elongated hole 17 is formed in the second rack 13, into which a bending member 18 formed in the first rack 10 is fitted, and is normally brought into contact with each other by a tension spring 14. At this position, the phases of the guide grooves that fit into the guide pieces 111L, 11b formed on the side plates 4L, 4b match, and the square holes 17 of the second rack 13 and the bending member 18 of the first rack 1o match. Only the spatial regions are configured to be able to slide relative to each other.

In FIG. 2, 26 is a lock release lever rotatably fixed to a shaft 27 fixed to the first rack 10, and a biasing spring 28 is connected to a spring hook 26t of the lock release lever 26.
L and the second arm portion 26C. The side parts are shown in FIG.

The operation of the cassette loading device of this embodiment constructed as described above will be described below with reference to FIGS. 2 to 16. FIG. 2 shows the state before insertion of the cassette.

FIGS. 8 to 15 are views of the main parts in FIGS. 2 to 6 as viewed from the direction (■). As shown in FIG. 8, before the cassette is inserted, the pressing portion 13& of the second rack 13 presses the first arm portion 26C of the lock release lever. Biasing spring 28
The other end 28& passes through the lower end of the second arm portion 26b and reaches the lower part of the lock lever 24. First arm part 2
60 is pressed, the biasing spring 28 is biased in the f direction, and also biases the lock lever 24 in the f direction, and its rotation is prevented by the second blocking member 29. FIG. 9 shows the state when the cassette is pushed in a little, and since only the first rack 10 moves, the pressing part 132L no longer presses the lock release lever 26, so the lock lever 24
is no longer biased in the f direction, and the lock lever 24 is in a position where it can engage with the plurality of teeth 23.

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 in. If the cassette holder 1 is continued to be pushed, the drive arm 6b and the gear 9, which are engaged with the guide pin 3b of the cassette holder 1, rotate in the direction of arrow C. Also, the first rack 1o that is meshing with the gear 9 moves in the direction of arrow d,
The second rack 13 does not move. At this time, when you release your hand, the cassette holder 1 tries to return in the direction of arrow e due to the force of the tension spring 14, but the tip of the lock lever 24 engages with a plurality of teeth 23 provided on the side plate 4b, and the first The rack 10 remains stopped.

At this time, FIG. 10 is a view of the main part in the {circle around (2)} direction.

Thereafter, the cassette-in switch 19 (not shown) is activated, the output gear 22 starts rotating, the second rack 13 meshing with the output gear 22 moves in the direction of arrow d, and the
As shown in the figure, the pressing part 131L presses the first arm part 260, so the lock is released and the bar 26 is released! rotate in the direction,
The end portion 25i1& of the biasing spring 28 also tries to rotate in the f direction. However, since the engagement force between the lock lever 24 and the plurality of teeth 23 is large (returning force is added by the spring 14), the end 28a of the biasing spring 28 charges the biasing force in the f direction while pushing the lock lever. 24, the lock lever 24 is not released. The second rack 13 moves further, and the elongated hole 17 of the second rack 13 and the bending member 18 of the first rack 1o come into contact with each other as shown in FIG. 13 try to move integrally in the d direction, the engagement force between the lock lever 24 and the plurality of teeth 23 disappears, so the lock lever 24 is rotated in the f direction by the force of the biasing spring as shown in FIG. Move and raise the lock lever 24 onto the upper part (arrow h) of the plurality of teeth 23.
Since it is rotated in the j direction by the spring 31, it is in a state where it does not mesh with the teeth 23 again.

FIG. 5 shows a situation in which the first rack 10 moves in the d direction after the cassette is pushed in, and the second rack 13 cannot catch up.

At this time, the pressing part 13! Since L is not pressing the lock release lever 26, no rotational force of the lock lever 24 in the f direction is generated. The lock lever 24 has an inclined surface (arrow i
), it rotates in the direction of arrow g and tries to fall off from the side play) 4b, but the first rack 1o
Because it comes into contact with the first regulating member 3o provided at This results in a state where they do not mesh.

FIG. 6 shows a state in which the cassette tape 21 has been completely installed in a predetermined position. At this point, the lock lever 24 has completely passed over the plurality of teeth 23 provided on the side plate 4b and is positioned above the teeth 23 by the first regulating member 30 and the spring 31.

FIGS. 4 and 14 show the state in which the cassette tape is being ejected. At this time, since the lock lever 24 moves above the plurality of teeth 23 (arrow h), there is no problem in the ejection operation (see FIGS. 14 to 16).

8 to 16 show the horizontal movement and vertical movement of the lock lever 24.

As described above, according to this embodiment, by providing the first rack with a lock lever that prevents reverse movement, the cassette tape is prevented from popping out, and the user's operational feeling can be improved.

Effects of the Invention As described above, according to the present invention, by providing the first rack with a lock lever to prevent reverse movement and the side plate with a plurality of teeth, it is possible to stop manual insertion of a cassette tape. This eliminates the problem of the cassette tape popping out at the time of use, and it is possible to obtain an extremely excellent effect of improving the user's operational feeling.

[Brief Description of the Drawings] Fig. 1 is a perspective view of a cassette loading device according to an embodiment of the present invention, Figs. 2 to 6 are side views for explaining the operation of this embodiment, and Fig. 7 is a lock The release lever, the biasing spring, and the enlarged perspective view of the shaft. Figures 8 to 15 are main parts for explaining the operation of the lock lever and the lock release lever.
FIG. 6 is a perspective view of a conventional cassette loading device, and FIGS. 17 to 20 are side views for explaining the operation of the cassette loading device shown in FIG. 16. 1...Cassette holder, 31L, 3b...
...Guidance pin, 4! L, 4 b------・Side plate, 6a, 6b... Drive arm, 10・
...-first rack, 13...second rack, 13a...mark/pressing part, 22...river/output gear, 2
3...Multiple teeth, 24...Mouth 7 clever, 26...Lock release lever, 28...
・・・Biasing spring 〇 Name of agent: Patent attorney Toshi Nakao, male and 1 other person
Figure 7 6c Figure 8 Figure 9? :Alo diagram Figure 11? 8-10-11 First rank 23-Plural A same or 5 teeth lO? 3 Required Figure 17 Figure 18 Figure 19 Figure 20

Claims (2)

[Claims] (1) A cassette holding member for storing cassette tapes having a plurality of protrusions formed on the side walls provided on both sides, and a side plate having a plurality of L-shaped guide grooves that engage with the protrusions of the cassette holding member. and rotatably supported by the side plate, and at least one of the protrusions on both sides.
a shaft to which an arm having a slidable guide groove is fixed, and a gear is integrally formed on one of the arms concentrically with the shaft, and the gear is meshed with the gear to engage the arm. The rack has teeth in a region that allows the rack to rotate by at least a certain angle, and a bent portion that engages with the second rack is formed in a part, and is movable horizontally along a guide member provided on one side of the side plate. a first rack, and has an angular elongated hole into which the bent portion provided on the first rack is engaged, and is connected to the first rack by a tension spring so as to be able to slide relative to each other. A second rack is movable along the guide member such that the rack is movable along the guide member, and has teeth formed over approximately the same length as the area of teeth formed on the first rack at a position that does not mesh with a gear integral with the arm. rack and
a lock rotatably attached to a toothed portion provided on the side plate and a shaft provided on the first rack, and biased by a spring so that an end thereof abuts the toothed portion of the side plate; The lever is rotatably attached to a shaft provided on the first rack, and when one end of the lever is fixed and a load is applied to the other end to displace it from the free position, the other end returns to its original free position. a lock release lever to which a spring is attached so as to return the lock release lever to a position; and a pressing part that abuts one end of the lock release lever on a part of the second rack;
When the second rack moves even slightly in a certain direction, it engages with teeth formed on the lock lever and the side plate, making it impossible to move in the opposite direction, and when the second rack moves in the same direction as the first rack, the second rack The pressing part presses one end of the lock release lever, and the spring attached to the lock release lever moves and biases the lock lever in the direction of releasing the engagement with the teeth, and the long hole of the second rack and the first end of the lock release lever are pressed. A cassette mounting device characterized in that the engagement between the lock lever and the teeth is released when the bent portions of the racks come into contact and both racks begin to move in the same direction. (2) The lock release lever is configured to move the lock lever in the tooth thickness direction to release the prevention of reverse movement, and is configured such that the prevention of reverse movement cannot be prevented until the first rack returns to the eject position. A cassette loading device according to claim 1, characterized in that: