JPS634275Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a mechanism for preventing erroneous insertion of a disk jacket, and in particular to a mechanism for preventing erroneous insertion of a disk jacket which utilizes a mechanism combining two pivoting levers, can be installed in a limited space, and has improved reliability.

In a disc playback device that sets the disc to a playable state by inserting the jacket containing the disc into the device and pulling it out, there is a risk of damaging the disc if the jacket is inserted while the disc is being played. Therefore, a mechanism for preventing incorrect insertion of the disk jacket is provided to ensure safety by preventing the jacket from being inserted during disk playback. Further, this mechanism for preventing incorrect insertion of the disk jacket must be placed on the side of the playback device and within a limited narrow space on the front side. A conventional mechanism for preventing incorrect insertion of a disk jacket consists of a rotary lever and a jacket insertion prevention member that engages with one end of the rotary lever to restrict jacket insertion. There are disadvantages in that the member cannot be rotated sufficiently and that a strong force is required to rotate the rotation lever, and a relatively strong force is required to insert the jacket.

The present invention eliminates the above-mentioned drawbacks, and has a structure in which the jacket insertion prevention member is displaced to a position where the jacket is prevented from being inserted, using a composite lever mechanism in which two rotary levers are stacked and connected. To provide a disk jacket erroneous insertion prevention mechanism that can be incorporated into a limited narrow space and that can reliably displace a jacket insertion prevention member to a position that prevents insertion of the jacket. The purpose is to

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

FIG. 1 is a perspective view schematically showing the structure of a disk playback device to which the disk jacket erroneous insertion prevention mechanism of the present invention is applied, and FIG. 2 is a perspective view of the disk jacket erroneous insertion prevention mechanism of the present invention. It is a diagram.

In FIG. 1, a disk jacket 1 is inserted into a video disk reproducing apparatus 2 through a jacket insertion opening 3, as indicated by the arrow. The jacket 1 is guided by left and right guide rails 4a and 4b, inserted to the back of the apparatus, and then pulled out. By this operation, only the empty jacket 1 is pulled out, and the disk is left inside the playback device 2 supported on the lift plate 5 in the raised position. Thereafter, by a regeneration operation, the lift plate 5 is lowered and the platter 6 is rotated. The disc is placed on a platter 6, rotated, and played back by a pickup device (not shown).

Reference numeral 7 denotes a disk jacket misinsertion prevention mechanism according to the present invention, which is disposed near the right end when viewed from the jacket insertion side and at a position on the side of the jacket insertion opening 3. Specifically, it is shown in Fig. 2. It is configured as shown in .

In FIG. 2, reference numeral 10 denotes a lift plate lift lever, which is pivotally supported near the side end of the jacket insertion opening 3 by a stepped screw 11, supported on a mounting base 12, and extends toward the back of the reproduction device 2. and arrow A,
It is provided to rotate in the B direction. This lever 10 is connected to a lift plate elevating mechanism (not shown) at a connecting portion 13, and in the illustrated state where the lever 10 is rotated in the direction of arrow B, the lift plate 5 is in the raised position. When the lift plate 5 is rotated in the direction of arrow A, the lift plate 5 is lowered. Note that the lever 10 has its tip end 14 pulled in the direction of arrow C by a tension coil spring 15, and rotates in the direction of arrow B before inserting the jacket. Further, the lever 10 has a cam portion 16 on the side edge on the distal end side, and this cam portion 16 is attached to the jacket 1.
In response to the insertion, the direction toward the back of the playback device 2 (arrow D
roller 18 at the lower end of the pole 17 moving in the direction
It is locked and pushed by.

Reference numeral 20 denotes a rotating lever, which is arranged so as to overlap the upper surface side of the lever 10, and is connected to a stepped screw 2.
It is pivoted by 1. The stepped screw 21 is fixed to the mounting base 12 through a relief hole 19 located approximately in the center of the lever 10. This rotating lever 20 is pivotally supported at a position closer to the back of the playback device 2 in the longitudinal direction, and has a short arm portion 20a extending toward the back of the playback device 2.
and a long arm portion 20b extending toward the jacket insertion opening 3 to approximately the location of the stepped screw 11. The short arm portion 20a is connected to the lever 10 by a connecting portion 22 formed by fitting a bent piece into an opening of the lever 10. The tip of the long arm portion 20b faces a jacket insertion prevention member 23, and controls the position of this member 23. The member 23 is rotatably attached to the vertical wall of the mounting base 12 with stepped screws 24.
A locking arm portion 25 protruding toward the path of movement of the pole 17
has. The member 23 rotates in accordance with the rotation of the rotation lever 20, and the locking arm portion 25 assumes a height position facing the pawl 17 and a retracted height position below the pawl 17.

As a result, when the position of the connecting portion 13 and the position of the member 23 are within predetermined conditions, the elevator lever 1
0, the connecting part 13 is configured to be quite far away from the center of rotation, and the relationship between the lifting lever 10 and the rotating lever 20 is such that as the lever 10 rotates, the lever 20 moves in the same direction as the lever 10. Furthermore, the tip of the long arm portion 20b of the lever 20 can be rotated relatively largely.

Next, the operation of the disk jacket erroneous insertion prevention mechanism 7 will be explained. When the reproducing device 2 is ready to accept the jacket 1, the lift plate 5 is in the raised position and the elevating lever 10 is rotating in the direction of arrow B. For this reason, the mechanism 7
As shown in FIG. 2, the tip of the long arm 20b of the rotary lever 20 is displaced in the direction of arrow E, and the jacket insertion prevention member 23 is rotated in the direction of arrow F, and its locking arm The portion 25 is at a retracted height position below the pawl 17, and the pawl 17 near the jacket insertion opening 3 is in a state where it can move in the direction of arrow D without being locked by the locking arm portion 25. Also,
The cam portion 16 of the lift lever 10 projects into the movement path of the pawl 17.

When the jacket 1 is inserted in the above state, the pawl 17 passes above the locking arm 25 and moves in the direction of arrow D. While the jacket 1 is being inserted into the reproduction device 2, the roller 18 hits the cam portion 16 of the lifting lever 10, and the roller 18 (pole 17) pushes it aside, that is, the lifting lever 10
is rotated and moved in the direction of arrow A against the spring 15 and the like. Here, the rotation of the lift lever 10 acts as a resistance force against the jacket insertion, but since the cam portion 16 is located far away from the center of rotation of the lift lever 10, the lever 10 can be rotated with a light force. Thus, the jacket 1 can be inserted with light force without forcing during insertion, and the disc can be smoothly inserted into the playback device 2 by simply pushing the jacket 1 lightly.

With the disc installed in the playback device 2,
When the play key (not shown) is pressed, a cam (not shown) that operates in conjunction with the play key rotates, the tensile force of the spring 15 connected to this cam is weakened, and the lift lever 10 moves in the direction of arrow A. As a result, the lift plate 5 is lowered by the lift plate elevating mechanism connected via the connecting portion 13 of the elevating lever 10, and the disk is regenerated as described above. Further, due to the rotation of the lift lever 10, the rotation lever 20 also rotates in the direction of the arrow A, and in particular, the tip of the long arm portion 20b is rotationally displaced in the direction of the arrow G.
The jacket insertion prevention member 23 is pushed by the long arm portion 20b and rotates in the direction of arrow H, and the locking arm portion 25 reaches a height position facing the pawl 17, thereby blocking the movement path of the pawl 17. Here, the pole 17 operates in conjunction with the insertion and extraction operations of the disk jacket 1 into the playback device 2. Therefore, disk jacket 1
is inserted into the playback device 2, the pole 17 is located at the inner side of the playback device 2, and when the disk jacket 1 is pulled out or the disk jacket 1 is not inserted, the pole 17 is inserted into the playback device 2. 2 (the position of the pole 17 shown in FIG. 2). This results in
The pawl 17 collides with the locking arm 25 and cannot move in the direction of the arrow D, which means that the jacket 1 cannot be inserted, and an erroneous operation such as inserting the jacket 1 into the playback device 2 even during disc playback may occur. This can be prevented.

Here, since the amount of rotational displacement of the tip of the long arm portion 20b of the rotational lever 20 is large, the jacket insertion prevention member 23 also rotates sufficiently to ensure the above operating position, which increases the reliability of the mechanism. Improves sex. Further, since the member 23 can be rotated with a light force, the rotational force at the tip of the long arm portion 20b of the rotary lever 20 is small, but the long arm portion 20b can be rotated without any trouble while rotating the member 23. do.

As explained above, the mechanism for preventing incorrect insertion of a disk jacket according to the present invention can be installed in a narrow and restricted space within a video disk playback device, and moreover, the mechanism for preventing incorrect insertion of a disk jacket can be installed in a large space. This makes it possible to ensure that the member assumes the operating position, improving the reliability of the mechanism, and also allows the jacket insertion operation to be performed with light force when the jacket is inserted normally. It has excellent effects such as being able to tighten the area.

[Brief explanation of the drawing]

Fig. 1 is a diagram schematically showing a video disc playback device to which the disc jacket misinsertion prevention mechanism of the present invention is applied, in correspondence with a disc jacket, and Fig. 2 is a diagram showing the disc jacket of the present invention. FIG. 3 is a perspective view showing an embodiment of the erroneous insertion prevention mechanism. 1...Disc jacket, 2...Video disc playback device, 3...Jacket insertion slot, 4a,
4b...Guide rail, 5...Lift plate,
6...Platform, 7...Mechanism for preventing incorrect insertion of disk jacket, 10...Lift plate elevating lever, 11, 21, 24...Step screw, 12...Mounting base, 16...Cam portion, 17... ...Paul, 18...
...Roller, 19...Escape hole, 20...Rotating lever, 20a...Short arm part, 20b...Long arm part, 22
... Connecting portion, 23 ... Jacket insertion prevention member,
25...Latching arm.

Claims (1)

[Scope of utility model registration request] In the disc jacket incorrect insertion prevention mechanism, which prevents a disc jacket inserted by mistake during disc playback by a jacket insertion prevention member in the disc playback device, the part on the jacket insertion opening side is pivotally supported. a lift plate elevating lever that is rotated to the first position during disk playback and to the second position during other modes to raise and lower the lift plate; A rotary member that is pivoted at a point on the inner side of the reproducing device, and connected to the lift plate elevating lever further from the pivot support on the inner side of the playback device, and rotates in accordance with the rotation of the lift plate elevating lever. The lift plate elevating lever has a cam portion on its side edge, and the cam portion moves toward the inner part of the reproducing device in response to the insertion operation of the disk jacket into the reproducing device. The rotary lever is held and pressed by a roller provided on a pole that moves to the side, and the rotary lever has an arm that extends to the jacket insertion opening side;
The arm portion is configured to undergo a large rotational displacement when the lift plate elevating lever is rotated to the first position, thereby placing the jacket insertion blocking member in an operating state for blocking insertion of the disk jacket. A mechanism to prevent incorrect insertion of disk jackets.