JPH0355171Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a disk clamper, and more particularly to a disk clamper for clamping a compact disk onto a turntable.

2. Description of the Related Art A disk clamper for clamping a compact disk onto a turntable is rotatably fitted into a circular hole at the tip of a clamp arm. The disc clamper is, for example, a resin molded product having a flange projecting from the upper and lower edges of the circumferential surface of a disc-shaped main body. The diameter of the collar is slightly larger than the diameter of the hole. The disc clamper is attached to the clamp arm by forcibly bending a part of the collar and fitting it into the hole.

Problems that the invention aims to solve: When installing in this way, it is necessary to forcefully push in the disc clamper in order to forcibly bend a part of the tsuba, which makes the installation work difficult and may damage the tsuba. There was a problem that there was a risk.

The object of the present invention is to provide a disk clamper that solves the above problems.

Means for Solving the Problems The present invention provides a disk clamper that fits into a circular hole at the tip of a clamp arm and is supported by the clamp arm, and that descends to clamp a disk on a turntable. Among the flange parts extending outward from the disk clamper main body so as to be located above and below the arm, a part of the flange part located on the lower side of the clamp arm extends outward from the other part, It has a structure in which a flange piece is provided at the upper part, which is bendable but has a base part that is shaped to make it difficult to bend downward from the horizontal.

Function: The collar piece having the above-mentioned base portion facilitates the work of attaching the disc clamper, and makes it difficult to remove the attached disc clamper.

Embodiment First, a disc playback device to which a disc clamper according to the present invention is applied will be described.

Figures 2, 3, and 4 each show the state before the disk attachment starts (when the disk detachment is completed), and the first
Figures 5 through 7 each show the disk mounted state. FIGS. 8, 9, and 10 show the operation when the disk is attached.

In each figure, reference numeral 1 denotes a disk tray, which has a concave disk placement part 2 and is held and guided by a plurality of guides 3 on both sides. It moves back and forth in the directions of arrows A ₁ and A ₂ between the disk mounting position shown in FIG.

Reference numeral 5 denotes a clamp arm, which is mounted on the chassis 4 with its base side supported by a support shaft 6 and biased to rotate in the direction of arrow _B1 by a spring 7 fitted to a pole 10, which will be described later. It rotates in the directions of arrows B ₁ and B ₂ between the clamp release position shown in FIG. 3 and the clamp position shown in FIG. 6. Arm 5
The poles 9 and 10 installed on the chassis 4 are fitted into both ends of the elongated opening 8 on the base side of the arm 5, and the position of the arm 5 in the direction of the arrow C in FIG. 2 is regulated.

The support shaft portion 6 is integrally formed with a pair of plate-shaped supports 35 that are outsert-molded on the chassis 4, as shown in FIG. This support shaft portion 6 is fitted into a hole 36 formed in a portion bent downward from the clamp arm 5.

Reference numeral 11 indicates a pinion, and reference numeral 12 indicates a drive mechanism, both of which are provided at a location below the disk tray 1 in the chassis 4. The drive mechanism 12 includes a motor 13
and gears 14, 15, and 16 that constitute a speed reduction mechanism. The motor 13 is attached to the lower surface of a concave dish portion 17 that is outsert-molded on the upper and lower surfaces of the chassis 4, and the gears 14 and 15 are attached to the bottom surface of the concave dish portion 17.
It is housed inside. The gears 16 and 15 are supported by shafts 17a and 17b, respectively, which are provided integrally with the plate portion 17. As a result, the deceleration mechanism is less susceptible to thermal expansion due to temperature changes, and the protrusion of the mechanism toward the upper surface of the chassis 4 is kept small. Further, the gears 14 and 16 at both ends are made of Jyuracon, and the intermediate gear 15 is made of nylon.
By making the intermediate gear 15 that meshes with the gears 14 and 16 made of nylon, the gear 15 absorbs gear noise, and the above reduction mechanism generates less gear noise than when all gears are made of Yuracon. is effectively suppressed.

The disc tray 1 is shown in FIGS. 11, 12,
The shape is also shown in FIG. 13, and a second rack 18 is formed between a and b on one inner side surface. Furthermore, a protrusion 19 is formed corresponding to one end b of the rack 18.

14 and 15 show the cam member 20. FIG.
The cam member 20 includes a cam portion 21 and an elongated sliding body 22.
It becomes more. The sliding body 22 is a first slider extending between c and d.
It has a rack 23 and a protrusion 24. Cam member 2
0, as shown in FIGS. 1 and 4, the sliding body 22
The pins 25 and 26 on the chassis 4 fit into and guide the elongated holes, and can slide in the directions of arrows A ₁ and A ₂ . In the cam member 20, the sliding body 22 is located below the disk tray 1, and the cam portion 21 is located on the side of the sliding body 22.

The first rack 23 and the second rack 18 are aligned in a straight line in the direction of arrow A1, as shown in FIGS. 1 and ₄ , and as shown in FIGS. 8 to 10. The height direction is different. The pinion 11 has a long hole 27 in the sliding body 22.
The first and second racks 23,1
It spans 8.

Next, the operation when the disk is attached will be explained.
Before the disk is mounted, the mounting is in the state shown in FIGS. 4 and 8.

The disk tray 1 is being pulled out in the direction of arrow _A2 , and the cam member 20 is also moving in the direction of arrow _A2 . As shown in FIG. 8, the first rack 23 is disengaged from the pinion 11, and only the second rack 18 is engaged with the pinion 11. As shown in FIG. 8, the clamp arm 5 is locked to the high portion of the cam member 21 and is located at a clamp release position rotated in the direction of arrow _B2 .

When a compact disk (not shown) is placed on the mounting portion 2 and a button is operated, the motor 13 starts and rotates in the normal direction, and the pinion 11 rotates in the direction of arrow D.
The second rack 18 is driven by the rotation of the pinion 11, and the disk tray moves in the direction of arrow _A1 . The cam member 20 remains stopped in the position shown in FIGS. 4 and 8. When the disk tray 1 is roughly drawn into the device 1 as shown in FIG.
9 comes into contact with the protrusion 24 and pushes it, and the cam member 2
0 moves in the direction of arrow _A1 together with the disk tray 1, and the end c of the first rack 23 meshes with the pinion 11.

When the protrusion 19 is in contact with the protrusion 24, the ninth
As shown in the figure, the end b of the second rack 18 and the end c of the first rack 23 substantially coincide with each other, and when the second rack 18 passes the pinion 11 and comes off the pinion 11, The first rack 23 starts to mesh with the pinion 11.

The disk tray 1 stops at a position where the second rack 18 passes through the pinion 11 and is removed from it, that is, at a disk mounting position.

Thereafter, the first rack 23 is driven by the pinion 11, and the cam member 20 moves independently in the direction of arrow _A1 to the position shown in FIGS. 1 and 10. During this movement, the clamp arm 5 rotates in the direction of arrow _B1 and reaches the clamp position, and the compact disc is clamped and mounted on the turntable 29 by the clamper 28. The motor 30 starts,
The compact disc is rotated and played by a pick-up device.

The disk removal operation is performed in the reverse order of the disk mounting operation described above. By operating the button, the motor 12 is started and the pinion 11 moves in the direction of arrow E in FIG.
Rotate in the direction. Initially, the first rack 23 is driven, and the cam member 20 moves in the direction of arrow _A2 independently of the disk tray 1 to release the disk clamp. The protrusion 24 pushes against the protrusion 19, the second rack 18 begins to mesh with the pinion 1, and the first rack 23 passes through and disengages from the pinion 11. The cam member 20 stops, and then the disc tray 1 moves in the direction of arrow _A2 and is pushed out of the device, and the compact disc is removed.

As mentioned above, since the pinion 11, the mechanism 12 that drives it, and the cam member 20 are all arranged below the disk tray 1, there are no parts that protrude laterally from the disk tray 1, and the device The width dimension W ₁ is actually the width dimension of disk tray 1.
It becomes approximately equal to W ₂ , and the device becomes considerably smaller than the conventional one.

Further, as shown in FIGS. 2 and 3, a locking member 31 is provided at the rear of the chassis 4 and supported by a shaft 31a. In the disk detached state,
The locking member 31 is in the state shown in FIG. 3 due to the spring 37, with the claw 31b hanging down and the base 31c
is rising. As the cam member 20 moves in the direction of arrow _A1 , the sliding body 22 pushes the base 31c, the locking member 31 rotates as shown in FIG. 6, and the claw 31b engages with the notch 32 of the disk tray 1. do. As a result, during disc playback, the disc tray 1 is locked at the disc loading position.

When the disc is released, arrow A ₂ of the cam member 20
Due to the movement in this direction, the sliding body 22 comes off from the base 31c, the locking member 31 rotates clockwise in FIG. 6, the claw 31b comes out of the notch 32, and the disk tray 1 is unlocked.

16 to 19 show the pickup device 40 and related mechanisms.

41 is a carriage to which a pick-up device 40 is attached;
The rack assembly 44 is movably fitted into the pinion 2 and supported by a rail 43 on the side opposite to this. Here too, the pinion 45 is made of nylon to absorb gear noise. When the motor 46 starts, the pinion 45 rotates via the worm gear mechanism 56.
The rack assembly 44 is driven, and the carriage 41 is guided by the guide rod 42 in the directions of arrows A ₁ and A ₂ .
That is, it moves in the radial direction of the mounted compact disc. Here, the worm gear mechanism 56 provided in the drive system prevents the carriage 41 from unnecessarily rattling due to the influence of vibrations and the like. The guide rod 42 and rail 43 are shown in Fig. 16 and Fig. 1.
As shown in FIG. 9, it is fixed to the chassis 4.

A slider 47 is narrower than the top and bottom of the rail 43 and slides along the rail 43. This slider 47 has a hole 48 that fits into a hanging shaft 49 from the carriage 41, and an adjustment screw 5 from the carriage 41.
0 is screwed into the screw hole 50. Between the carriage 41 and the slider 47,
A compression coil spring 52 is fitted to the adjustment screw 50 and presses the slider 47 up and down.

As a result, by rotating the adjustment screw 50 in the screwing direction and in the opposite direction, the distance between the slider 47 and the carriage 41 changes, and the height of the carriage 41 on the rail 43 side changes. The carriage 41 then rotates about the guide rod 42 in the direction of arrow F. That is, by appropriately operating the adjustment screw 50, the turntable 29 of the optical axis 54 of the pickup device 40 having the lens 53 can be adjusted.
The angular deviation from the axis 55 (this is called jitter) can be adjusted.

The rack assembly 44 includes a first rack 60 and a second rack 60, as shown in FIGS. 17 and 19.
1 overlap with each other and are biased by the compression coil spring 62 in the directions of arrows A ₁ and A ₂ , and the pinion 45
The screws 63 and 64 are tightly engaged with each other and fixed by screws 63 and 64, and the screws are driven with zero backlash.

During regeneration, the carriage 41 once moves in the direction of arrow _A1 in FIG. 16, the rod portion 70 presses the leaf switch 71 to close it, and moves in the direction of arrow _A2 (toward the outer circumference of the disc) from this position as a reference. to play the specified location on the disc. A stopper 72 is fixed to the leaf switch 71 on the chassis 4. This stopper 72 receives the tip of the rod portion 70 that closes the leaf switch 71, and prevents the carriage 41 from moving beyond the reference position toward the inner circumference of the disc. By providing the stopper 72, the leaf switch 7 can be used as an inexpensive detection switch.
1 is now available.

Next, an embodiment of the disk clamper according to the present invention will be described.

The clamper 28 is shown in FIGS. 20 to 22. The clamper 28 includes a generally disc-shaped main body 28a, a flange 80 extending upward in one diameter direction from the upper end of the main body 28a,
81, has collar portions 82 and 83 projecting from the lower end in a diametrical direction perpendicular to the first diameter. Tsuba 8
2 consists of flange pieces 84, 85, and 86, and the center flange piece 85 is thin and has an inverted U-shaped base 87, and can be easily attached to the upper part as shown by the two-dot chain line in FIG. Can be bent, but difficult to bend below horizontal. The radius R ₁ of the collar piece 85 is the radius of the collar pieces 84 and 86.
It is set to be slightly larger than R ₂ .

As shown in FIG. 23, the above-described clamper 28 has the flange 83 side fitted into the circular hole 88 at the tip of the clamp arm 5, and the flange 82 side tilted downward as shown by arrow G. Attaches by pressing. That is, the collar piece 85 is bent upward as shown by the two-dot chain line and passes through the circular hole 88, and the clamper 28 is fitted into the circular hole 88 of the arm 5. The flange piece 85 then returns to its original horizontal position, and since it is difficult to bend downward, the clamper 28 is inserted into the hole 88.
This will definitely prevent it from coming off.

Note that 89 is an annular magnet, and 90 is an annular yoke.

24 to 26 respectively show the disk lifter 9.
1 is shown. The disk lifter 91 is a resin molded product having a substantially rectangular frame shape, and has shafts 92 and 93 at one end.
Bearing parts 94 and 95 at the bottom of the disk tray 1
(See Figure 13)
It is attached to the bottom of the. This disk lifter 9
1, all four disk support protrusions 96 are provided. The disk lifter 91 has a pair of leaf springs 98 and 9 screwed to the disk tray 1 at one end.
9, and when the disk is detached, it rotates in the direction of arrow _H1 as shown in FIG. It stands out. The compact disc 110 is placed on the disc support protrusion 96 and is mounted on the turntable 29.
supported in a higher position. When the disk is attached, the pair of support columns 97 are pushed by the clamp arm 5 and rotated in the direction of arrow _H2 , so that the disk support protrusion 96 is buried in the disk tray 1. The compact disk 110 is lowered and placed on the turntable 2.
9 and is clamped by the clamper 28.

The disc lifter 91 is the second in the free state.
As shown in FIG. 7, the tip side is inclined upward at an angle α. Therefore, when the disk lifter 91 rotates until the disk support protrusion 96 is buried in the disk tray 1, the disk lifter 91
As shown in FIG. 27, the tip end side of the disk tray 1 is in a substantially horizontal state and is not in a downwardly inclined state, and the space required below the disk tray 1 for the rotation of the disk lifter 91 is narrow. That's enough. As a result, although the length of the disk lifter 91 is long, the disk tray 1 is placed close to the chassis 4 as shown in FIGS. 25 and 27, thereby making the disk playback device thinner. .

Moreover, about half of the entire length of the disc lifter 91 on the tip side is thin and has flexibility. Therefore, when the disc lifter 91 is rotated in the direction of arrow _H1 , the distal end side of the disc lifter 91 is elastically bent in the direction in which the angle α becomes zero, as shown in FIG. 25, and the spring 98, 99 is pressed against the lower surface of the disk tray, and the disk support protrusion 96 protrudes above the disk tray 1 to a predetermined height. That is, even if the disk lifter 91 has a shape in which its tip side is inclined, the flexibility of the disk lifter 91 itself allows the disk support protrusion 96 to
will reliably protrude to a predetermined height.

Furthermore, making the disc lifter 91 thin as described above also contributes to narrowing the space between the disc tray 1 and the chassis 4.

Each disk support protrusion 96 has a structure in which a substantially conical protrusion 96a integrally formed with the disk lifter 91 is covered with a rubber cap 96b, as shown in an enlarged view in FIG. With this rubber cap 96b, the compact disk 11
This absorbs the impact when the compact disk 110 is placed and prevents the compact disk 110 from being damaged.

Further, the disk lifter 91 is connected to the disk tray 1.
The second rack 18 is not attached to the side of the disk tray 1, but is supported on the inner side thereof.
is formed without support.

Furthermore, plate springs 98 and 99 are used as means for biasing the disk lifter 91, and both the disk lifter 91 and the plate springs 98 and 99 can be attached from the lower surface side of the disk tray 1, so that assembly is easy.

Further, as shown in FIGS. 7 and 30, a wire stopper 101 is provided on the lower surface of the chassis 4 to stop the wire 100 drawn out from the motor. The wire stopper 101 has a pair of cylinders 102 and 10.
3, a pillar 104 having a hook portion 104a is arranged between the pillars 104. The electric wire 100 is indicated by arrow I in FIG.
By inserting it between the columns from the top side of each column as shown in , it is narrowed by the columns 102, 103, and 104, and is held in a state where it is difficult to bend and come off. Therefore, it is fastened to the electric wire 100 with good workability and routed around the chassis 4. The slope 104b at the top of the pillar 104 makes it easy to insert the electric wire 100 between the pillars, and the hook part 104b prevents the electric wire 100 from coming out once inserted.

Effects of the Invention As mentioned above, according to the disc clamper of the present invention, since the collar piece can be bent upward, the disc clamper can be fitted and attached to the circular hole at the tip of the clamp arm by simply pushing the disc clamper lightly. This makes it easy to attach the disk clamper to the clamp arm, and since the flange piece is difficult to bend downward from the horizontal, the disk clamper cannot be pulled out of the circular hole in the clamp arm once attached. It has the advantage of being able to reliably prevent this.

[Brief explanation of the drawing]

FIG. 1 is a plan view with a portion of the disk tray cut away showing the disk mounting state of a disk playback device to which the disk clamper of the present invention is applied;
3 is a plan view and a front view showing the state before the disk installation starts (when the disk detachment is completed), FIG. 4 is a plan view with a part of the disk tray in FIG. 2 cut away, and FIG. 6 and 7 are a plan view, a front view, and a side view respectively showing the state in which the disk is attached; FIGS. 8, 9, and 10 are diagrams explaining the operation when the disk is attached; FIG. 11 and FIG. Figures 12 and 13 are a plan view, partially cutaway front view, and bottom view of the disk tray, respectively.
14 and 15 are a plan view and a front view of the cam member, respectively, FIG. 16 is a plan view showing a cartridge for a pickup device and a mechanism related thereto, and FIG.
Figures 18 and 19 are respectively enlarged plan views of the pick-up device carriage in Figure 16;
A front view, a side view, and FIG. 20 are a plan view of an embodiment of the disc clamper according to the present invention, and FIG.
Figure 2 shows lines XX-XX and XX- in Figure 20, respectively.
A cross-sectional view taken along line XX, FIG. 23 is a diagram explaining the method of attaching the clamper to the clamp arm, and FIGS. 24, 25, and 26 are a plan view, front view, side view, and FIG. Figure 27 is a diagram showing the state when the disk lifter is rotated downward, Figure 28 is a diagram showing the structure of the disk support protrusion, Figure 29 is an exploded perspective view of the part that supports the clamp arm, and Figure 30. FIG. 2 is a perspective view showing a wire stopper. 5... Clamp arm, 29... Turntable, 80-83... Flange section, 84-86... Flange piece,
87... Root portion, 88... Circular hole, 89... Magnet, 90... Yoke, 110... Compact disk.

Claims (1)

[Scope of Claim for Utility Model Registration] In a disk clamper that fits into a circular hole at the tip of the clamp arm and is supported by the clamp arm and descends to clamp the disk on the turntable, to be located,
Among the flanges that protrude outward from the disk clamper body, a part of the flanges located on the lower side of the clamp arm extends outward from the other parts and is bendable upward, but not horizontally. A disk clamper configured to include a collar piece having a base portion shaped to make it difficult to bend downward.