JPS635820B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a recording disk reproducing apparatus, and more particularly to a recording disk moving mechanism.

Conventionally, there have been devices of this type as shown in FIGS. 1 and 2. In the figure, 1 is a recording disk, 2
2a is the protective case that stores the recording disk 1, 2a is the opening side of this, 3 is the cartridge half that is fitted into the opening side 2a, and 3a is the cartridge half 3 that prevents it from coming out of the protective case 2. 4 is a chassis, 5 is a guide rod fixed to this chassis 4, 6 is a movable body that slides along this guide rod 5, and 7 is mounted on this movable body 6 to play back a recording disc. 8 is the right rail A, 1 attached to the front chassis 9.
0 is the right rail B that is attached to the moving body 6, 11 is the right rail C that is attached to the rear chassis 12, 13 is the left rail that is attached to the side chassis 14, and 15 is the right rail 8, 10, 11.
and an opening mechanism for the protective case 2 that slides along the left rail 13; 16 is a clamp mechanism fixed to the chassis 4; 17 is a disk clamp portion for clamping the recording disk 1; 18 is the cartridge half 3; 19 is a turntable rotatably driven by a disk motor (not shown);
This is a support that supports the recording disk 1 by penetrating the hole 19a provided in the hole 19a.

Next, the operation will be explained. The protective case 2 containing the recording disk 1 is inserted through the opening 9a of the front chassis 9, and is engaged with the opening mechanism 15 to be opened. When the player reaches the innermost part of the playback device, the recording disk 1 and cartridge half 3 are held by the clamp mechanism 16, and only the protective case 2 is removed from the playback device. Next, a lift mechanism (not shown) is operated by a driving means such as an electric motor, and the support body 20 is lowered.At the same time, it is engaged with the lift mechanism, and the lower clamper 17a is also rotated downward. , recording disc 1 is on turntable 19
mounted on top. This completes the mounting operation, and the moving body 6 is sent by driving a feeding mechanism (not shown), and the regeneration operation begins. When the reproduction is completed, the moving body 6 returns to the initial position by driving the feed mechanism (not shown), and the supporting body 20 and the lower clamper 17a operate by driving the lift mechanism (not shown), and the recording disc 1 rises and reaches the top position. By inserting and removing the protective case in this state, the recording disk 1 and cartridge half 3 in the reproducing apparatus are recovered.

However, in the above operation explanation, the recording disk 1
When only the protective case 2 is pulled out with the protective case 2 remaining, the frictional force between the protective case 2 and the recording disk 1 may cause the recording disk 1 to also come out. In order to prevent this, the lower clamper 17a of the disc clamping section 17 needs to be pressed with a predetermined load or more. Since this operation is performed in the final section of the operation stroke of the lift mechanism (not shown) (hereinafter, this section will be referred to as the clamper press section), when operating this clamper press section,
This has the disadvantage that a large load is applied to the drive source and a large drive source is required.

This invention attempts to eliminate the above-mentioned drawbacks of the conventional ones, and by generating a strong driving force in the clamper pressing section of the lift mechanism, it is possible to create an inexpensive recording disk that can be operated with a small drive source. The purpose is to provide a playback device.

An embodiment of the present invention will be described below with reference to the drawings. That is, in FIGS. 3 to 3, reference numeral 21 denotes an engaging portion forming the left end of the moving body 6, 22 a rack plate fixed to the moving body 6, and 23 hinged with this rack plate to connect the moving body 6. 24 is a moving motor of this, 25 is a force increasing mechanism, 26 is a bracket, 27 is a first plate pivotally supported by a pin 28 set up on the bracket 26, and 29 is this first plate 27. provided in the engaging portion 21 of the moving body.
30 is a second plate pivotally supported by a pin 31 set up on the bracket 26; 32 is a roller provided on the second plate 30; and 32 is a roller provided on the second plate 30; The guide groove 27a is engaged with the guide groove 27a. 33 is a lift mechanism, 34 is a bracket, 35 is a lift cam, 36
is a lift arm, and a lift cam 35 and a lift arm 36 are coaxially supported by a pin 37 set upright on a lift bracket 34. Reference numeral 38 denotes a torsion spring, which is hung on the protrusion 35a of the lift cam 35 and the protrusion 36a of the lift arm 36. 36
A pin b is provided on the lift arm 36 and is engaged with an elongated hole 35b of the lift cam 35, and the pin 36b is pressed against the left end of the elongated hole 35b by the load of the torsion spring 38. A link plate 39 is pivotally supported between the second plate 30 and the lift arm 36. A lift plate 40 supports the support 20 of the recording disk 1, and can be moved up and down by the rotation of an arm 42 pivotally supported by a bracket 41. 43 is lift cam 35
The link plate is pivotally supported by the arm 42, and is in a positional relationship such that the lift plate 40 is raised when the lift cam 35 rotates counterclockwise in FIG. Although not shown in the drawings, a parallel posture maintaining mechanism such as a pantograph is provided for raising and lowering the lift plate 40 while maintaining the parallel posture. Reference numeral 44 denotes a tension spring provided between the lift arm 36 and the bracket 34, which urges the lift arm 36 clockwise in the figure, that is, the lift plate 40 in the downward direction. The plate 40 is in contact with the chassis 4.

45 is a pin 46 set upright on the bracket 34.
The cam plate is pivotally supported by the cam plate and is biased counterclockwise in the figure by a torsion spring (not shown), and comes into contact with the protrusion 34a of the bracket 34. 4
7 is a bracket of the clamper mechanism 16; 4;
8 is a pin, and 17a is a lower clamper pivotally supported by this pin 48, which is urged by a tension spring 49 to rotate downward. 50 is a wire hung on the protrusion 17aa of the lower clamper 17a, 51 is a guide roller, 52 is a tension spring having an initial tension corresponding to the required load of the lower clamper 17a, and the wire 50 and the cam plate 4
It is located between 5.

Next, the operation will be explained. FIG. 3 is a diagram corresponding to FIG. 2 showing a conventional embodiment of the apparatus, that is, the recording disk 1 is at the upper limit position and is held under pressure by the lower clamper 17a and the upper clamper 17b, and the fourth The figure is a sectional view of FIG. 3. That is, the movable body 6 is at the rightmost position of movement (hereinafter referred to as the standby position), and the force amplifying mechanism 25 is actuated by the engaging portion 21 of the movable body 6, and the link plate 39 is moved with the amplified load. It's taut.
Since the tension of the torsion spring 38 is greater than the necessary load to support the weight of the lift part such as the support 20 and the weight of one recording disk, the pin 36b provided on the lift arm 36 is inserted into the left end of the elongated hole 35b of the lift cam 35. The pressed state is maintained, and the recording disk 1 is held at the upper limit position. Furthermore, the tension spring 51 is pulled through the cam plate 45 by the pressing action of the roller 36c provided on the lift arm 36, and presses the lower clamper 17a upward with more load than necessary.

FIG. 5 shows a state in which the moving body 6 is moved to the left by the drive of the feeding device 23, and FIG. 6 is a sectional view of this. In FIG. 5, the force increasing mechanism 25 is disengaged from the movable body engaging portion 21, and the lift arm 36 and lift cam 35 are rotated clockwise due to the weight of the lift portion and the action of the tension spring 44. . Due to this rotation, the lift plate 40 and the recording disk 1 supported by the lift plate 40 are lowered, and the recording disk 1 is lowered.
touches the turntable 19, and the lift plate 40 also descends to a position where it no longer makes contact with the support 20. Further, due to the rotation of the lift arm 36 described above, the cam plate 45 rotates counterclockwise,
Lower clamper 17 via wire rope 50
A also rotates downward, and as shown in FIG. 6, the downward movement of the recording disk 1 cannot be prevented. In the state shown in FIGS. 5 and 6, the recording disk 1 rotates and a reproducing operation is performed, but when this reproducing operation is completed, the moving body
moves to the right, the movable body engaging portion 21 and the force increasing mechanism 25 engage, and the recording disk 1 is raised. Then, just before the movable body 6 reaches the standby position, the force increasing mechanism 2
At 5, a strong tensile force is generated and the tension spring 52 is expanded to hold the recording disk 1 and return to the state shown in FIGS. 3-4.

Here, the force increasing mechanism 25 will be explained in detail with reference to FIGS. 7 and 8. 7 and 8 show the operation when the movable body 6 in the regeneration state returns to the standby position, and in FIG. 7, the engaging portion 21 of the movable body 6 comes into contact with the roller 29 of the first plate 27. This shows the state in which the In this state, the roller 32 of the second plate 30 is in contact with the first inclined side 27b of the guide groove 27a, and the link plate 39 is displaced with a stroke approximately equal to the amount of movement of the movable body 6.

FIG. 8 shows the state when the movable body 6 has arrived just before the standby position, and the roller 32 is in the guide groove 27a.
The second inclined side 27c is in contact with the second inclined side 27c. At this time, the amount of rotation of the second plate 30 is small with respect to the amount of rotation of the first plate 27, and therefore, the link plate is applied with a load that is several times stronger than the load that drives the moving body 6. 39 can be displaced.

In the above embodiment, the force increasing mechanism 25 using two rotating plates 27 and 30 as shown in FIGS. 7 and 8 was used, but a structure as shown in FIGS. 9 and 10 was used. It's okay. That is, FIG. 9 shows the positional relationship corresponding to FIG. 7, and FIG. 10 shows the positional relationship equivalent to FIG. 8. As shown in FIG. rotational force F ₁
Link plate 39 with the load of F ₂ increased against
can be pulled.

As described above, the present invention is equipped with a device that raises and lowers the recording disk using the moving force of a moving body, and is equipped with a force increasing mechanism that generates a strong load near the end of the moving stroke of the moving body. This has the effect of providing an inexpensive recording disk reproducing device that can be operated using a drive source.

[Brief explanation of the drawing]

1 and 2 are diagrams showing a conventional recording disc reproducing apparatus, FIGS. 3 to 8 are diagrams showing an embodiment of a recording disc reproducing apparatus according to the present invention, and FIGS.
FIG. 0 is a diagram showing a recording disk reproducing apparatus according to another embodiment of the present invention. In the figure, 1... recording disk, 6... moving object,
16... Clamp mechanism, 17a... Lower clamper, 21... Engaging portion, 23... Feeding device, 25...
... Force boosting mechanism, 27... First plate, 30... Second plate, 33... Lift mechanism, 35... Lift cam, 36... Lift arm, 39... Link plate, 51... Tension spring. In addition, in the figures, the same reference numerals indicate the same or equivalent parts.

Claims (1)

[Claims] 1. In a device that reproduces information signals by rotating a recording disk on which information signals are recorded in a spiral or concentric pattern relative to a signal detector, a first position for attaching and detaching the recording disk; a lift mechanism that moves the recording disk between a second position separated from the recording disk and a second position where information signals are detected from the recording disk via the signal detector; a movable body that reciprocates in a radial direction; and an amplifying force that is releasably engaged between the movable body and the lift mechanism to increase the driving force for moving the movable body within a predetermined operating range and transmit it to the wrist mechanism. A recording disk reproducing device characterized by being equipped with a mechanism.