JPS61156561A - Loading mechanism of recording disk - Google Patents

Abstract

PURPOSE:To decrease the number of parts, and to make a device small in size and light in weight by turning a sub-chassis incorporating turntable, in a range of a small angle by a combination of a crank metallic fixture, a reciprocating operation mechanism, and a transfer member. CONSTITUTION:When a disk 18 is placed on a slide table 12 and the slide table 12 is closed, the slide table 12 is locked, the second microswitch is operated, a motor 30 is started, and a rack 17 engaged with a pinion 38 is moved to the rear part of a reproducing device body 11. A sub-chassis 14 is rotated, and a crank arm 43 of a crank shaft 41 is also engaged and moved backward. The disk 18 is lifted up by a turntable 22, and pressed against a disk clamper 27. When the sub-chassis 14 is rotated and the turntable 22 is lifted up to a prescribed position, the third microswitch is operated, and the rotation of a motor 30 is stopped. In this way, the disk 18 becomes a state that it has been inserted and held by the turntable 22 and the disk clamper 27, and loading of the disk is executed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an audio or video information recording and reproducing apparatus using laser light, and more particularly to an optical recording disk loading mechanism.

[Technical background of the invention and its problems]

For several years now, in the audio and video fields, information has been stored by irradiating a recording disk (hereinafter referred to as a disk) with laser light.
Optical video disks have been introduced that reproduce signals as changes in the amount of returned light due to bit diffraction. For such playback devices, the front-loading method, in which disks are loaded and unloaded from the front of the playback device, has become mainstream for ease of operation and efficient use of space. Hereinafter, a loading mechanism of a conventional front-loading type optical disk reproducing apparatus will be described with reference to the accompanying drawings, FIGS. 10 to 15.

FIG. 11 shows a state in which the slide table 2 for loading and unloading a disc is pulled out from the front of the playback device, and FIG. 10 shows a state in which it is closed.

In FIG. 12, a slide table 2 has a disk 1 placed on it and an elevating plate 3 that is movable up and down.

A turntable 5 is attached to the motor 4. The turntable 5 rotates as the motor 4 rotates, and on which the disc 1 is placed and rotated together during a playback operation. Furthermore, a center spindle 6 for positioning the center of the disc 1 is also attached so as to rotate together with the turntable 5.

The disc clamper 7 is rotatably attached to a center stay 10 fixed to an arm 8 so as to cross both sides of the playback device, and is moved up and down by a support arm 8 rotating around a fulcrum 9 to hold the disc 1. It serves to hold it down on the turntable 5.

In the above configuration, in order to load the disks, first, as shown in FIG. Load the disc.

Next: 2. Push in the slide table 2 to close it as shown in Figure 13. In this state, the disk 1 is still on the elevating plate 3.
It's on top of the.

Then, as shown in FIG. 14, the elevating plate 3 descends to a level lower than the turntable 5. This: 2 Therefore, the disc l is placed on the turntable 5.

After that, the arm 8 rotates downward using the pin 9 as a fulcrum, and the disc clamp 7 presses down the disc 1 placed on the turntable 5. Therefore, the disc 1 is moved between the turntable 5 and the disc clamper. 7 (- It is clamped and loading is completed.

When unloading, the operation is the opposite of the above, i.e.
The arm 8 rotates upward using the bin 9 as a fulcrum, and the disc crane (-7) rises.

Missing (- The elevating plate 3 rises to the top of the turntable 5; Lift up the disc 1 placed on it and place it on the elevating plate 3. After the elevating plate 3 rises to a predetermined position on the slide table 2, the slide table 2 and take out the disk 1. Note that in FIG.

In the conventional structure described above, since the disk clamper 7 must be lowered to clamp the disk 1, a mechanism for moving the disk clamper 7 up and down is required. Furthermore, it is necessary to incorporate a mechanism for moving the lifting plate 3 up and down, which requires a large number of parts, which hinders miniaturization of the device.

Furthermore, the slide table 2 and the lift plate 3 are constructed as separate pieces, and in order for the lift plate 3 to move up and down with respect to the slide table 2, the slide table 2 has a hole through which the lift plate 3 passes. It is provided. However, since the slide table 2 is frequently put in and taken out by hand, it must not be easily damaged in case force is accidentally applied in the vertical direction. However, it has the disadvantage of having the large hole mentioned above and having to have a thick structure to prevent it from cracking.

[Purpose of the invention]

The non-invention was made in view of the above circumstances.

To provide a recording disk loading mechanism that has fewer parts than a conventional playback device, has a simpler loading mechanism, and has a thinner slide table to reduce the weight and weight of the device.

[Summary of the invention]

In order to achieve the above object, one aspect of the present invention is as follows.

Main chassis and this main chassis): Lifting operation = T function: Chip chassis supported by the main chassis, Turntable placed on this sub-chassis and rotationally driven by the turntable motor, A slide table that transports the recording disc to a position that coincides with the rotation center of the turntable, a disc clamper that is rotatably attached to a center steering wheel fixed to the main chassis, and a crankshaft that is rotatably attached to the main chassis. A crank arm fixed to both ends of the crankshaft, a reciprocating mechanism attached to the main chassis that performs reciprocating motion during loading and unloading, and transmitting this reciprocating motion to the crank arm with a single force; To provide a recording disc loading mechanism characterized by comprising a sub-chassis 1 which is attached to a chassis and transmits the rotational movement of the other crank arm; and a transmission member.

[Embodiments of the invention]

Hereinafter, embodiments of the invention will be described with reference to the drawings.

In FIG. 1, the sub-chassis 14 is rotatably attached to the main chassis 13 by a two-point webbing 15a and a pin 15b at one end. In addition, the f bushing chassis 14 includes a turntable motor 21 to which a turntable 22 for mounting and rotating a disc is attached, and a carriage 16 incorporating a pickup head n for reading and reproducing signals and moving in the radial direction of the disc. installed. The reciprocating mechanism 20 is composed of a carriage 16, a rack 17, which will be described later, and a spring 29.

Unlike the conventional slide table 12, the portion on which the disk is placed does not move up and down, but is integrally formed.

Above the turntable 22 is a centasty 28 (; disk clamper 28) fixed to the main chassis 13.
7) is attached so that it can rotate together with the disc during playback operation.

The rotation of the motor 30, which serves both as a disk loading drive and a pickup head feeding drive, is controlled by a small pulley 31. Large pulley 32, belt o, first gear A, second gear 35. The speed is reduced by a speed reduction mechanism 50 composed of a third gear 36 and a fourth gear 37, and the pinion 38 (: rotation is transmitted) always remains in mesh with the rack 17.

These reduction gears 34, 35, 36° 37 and pulleys 31
．． 32 is incorporated into the bracket 39 and fixed to the napshaft 14. Here, the motor 30 may be attached to the frame chassis 14 together with the reduction mechanism 50, or may be attached to the main chassis 13.
The belt wings stretched between the pulley 32 and the pulley 32 are relatively flexible, and even if the relative position of the napsher changes slightly, the rotation transmission function is not affected in any way.

In order to rotate the napun palm 14 and move it up and down, 40 slit holes are formed in the transmission member 24 provided at the front end of the sub-chassis 14, and the platen 45 fixed to the main chassis 13 is rotatable. An L-shaped crank arm 42 at one end of the held crankshaft 41 is engaged.

The other rod-shaped crank 7° arm of the crankshaft 41 is in a position where it comes into contact with the head member of the rack 17 during loading and unloading of the disc.

Although not shown in FIG. 1, the subchassis 14 is
The turntable 4 is always urged by the spring 46 to rotate in the upward direction. (See the spring 46 in Fig. 3 and S4.) The bush back mechanism 51 for pushing out the slide table 12 is constructed as follows. The cleverer 53 is rotatably attached to the rear of the main chassis 13 by a support pin 54, and one end is constantly pulled by a spring 55 (in a direction that pushes out the varnished table 12).

Therefore, when the lock [4 (not shown) that locks the slide table 12 is released, the slide table 12 is pushed out by this pusher back mechanism 51 and pulled out by about a few centimeters, so grasp it with your hand and pull it out. be able to.

In FIG. 3, the bracket 45 is attached to the main chassis 1.
3, and its platen) 45 (:, , the crankshaft 41 is rotatable 1: is held).

In the recording disc reproducing apparatus configured as described above, in a normal rest state, the sub-chassis 14 rotates as shown in FIG. 4, the turntable 22 is in the raised position, and the disc 18 is not present.

The operation of the present invention is performed in the following order.

l) Operation of pulling out the slide table First, press the disc set/eject button on the recording disc playback device. Then, the motor 30 shown in FIG. 1 operates, the rotation is transmitted to the pinion blade, and the rack 17, which is meshed with the pinion, begins to move toward the front of the playback device main body 11. At this time, since the carriage 16 is stopped by the stopper 48 so as not to move forward any further, the carriage 16 moves forward by the rack 17 while the spring 29 is extended. At this time, the bosses 26a and 26b of the carriage 16 slide from the front end to the rear end of the elongated holes 25a and b of the rack 17. The head member of the rack 17 that moves forward is the crankshaft 41.
Crank SL! 43 to rotate the crankshaft weight and crank arm string to lower the subchassis 14. When the crank arm 42 finishes tilting forward and downward, a first microswitch (not shown) is activated to stop the rotation of the motor 30, and at the same time, the subshaft 14 finishes lowering.
The slide table 12 is unlocked (not shown), and the roller 5 of the bush pack lever 53 shown in FIG.
6 pushes out the slide table 12 by the force of the spring 55.

Then, the user pulls out the slide table 12 by hand just enough to take the disc in and out.

l) Disc Loading Operation FIG. 3: As shown, the disc 18 is placed on the slide table 12 (; and the slide table 12 is closed.

When the slide table 12 is closed, the slide table 12
is locked, and when locked, a second microswitch (not shown) is actuated to start the motor 30 shown in FIG. Move to the rear of the playback device main body 11 as shown in FIG. At this time, since the sub-chassis 14 is pulled upward by the spring 46, it is subjected to a force that attempts to rotate the main body 11 of the reproduction apparatus upward using the bins 15a and 15b as support axes. Therefore, when the rack 17 moves backward, the Sarasha ν14 rotates as shown in FIG.
The crank arm 4 of the crankshaft 41 is also engaged and moved backward. As the subshear 14 rotates, the disk 18 is lifted by the rising turntable 22 and pressed against the disk clamper 27. When the sub-chassis 14 rotates and the turntable 22 rises to a predetermined position,
A third microswitch (not shown) operates to motor 30.
stops rotating. In this way, the disc 18 is held between the turntable 4 and the disc clamper 27, and the disc is loaded.

The unloading operation is the opposite of the loading operation. In other words, due to the fourth factor, the sub-chassis 14 descends as shown in FIG. 3, and at the same time the turntable 22
The slide table 12 and the disk drive 8 are also lowered, and the disk drive 18 is left on top of the slide table 12, and the slide table 12 and the disk drive 8 can be pulled out, as shown by the dashed line in FIG. Disc 18 is removed.

As described above, 1:1 According to this embodiment, unlike the conventional slide table, the elevating plate 3 is connected to the slide table 12.
Since the sheath is formed integrally with the main sheath 13, it does not move up and down, but only slides back and forth with respect to the main sheath 13. Further, the sub-chassis 14 is provided separately from the main chassis 13, and has bins 15m and 15b rotatable at the rear of the main chassis 13.
;Supported. Therefore.

Compared to the conventional device, which was equipped with two mechanisms: one to move the lifting plate 3 up and down, and the other to move the disk clamper 7 up and down, loading and unloading of the disk is now possible using only a mechanism that moves the napkin yarn 14 up and down. Now I can do it.

The mechanism for moving the sub-chassis 14 up and down is a motor 39 which also serves as a drive for transporting the pickup head.
The carriage 16 and rack 17 move from the rotating bench, and the crank arm 43 is pushed and rotated by the head member of the rack 17, which causes the sub-chassis 14 to move up and down.As a result, the number of parts is reduced. This makes it possible to reduce the size and weight of the device, and improve reliability (excellent).Instead of connecting the slit hole 4o and the L-shaped crank arm 42 of the crankshaft 41, the L-shaped crank arm 42 is simply made elastic. The operation and effects of the present invention can be obtained even if the transmission member is fixed to the base.

[Other embodiments of the invention]

In FIG. 5, an inclined cam 60 is provided as a modification of the slit hole 40 of the transmission member 24 provided at the tip of the sub-chassis 14 in FIG. The Lfi crank arm 42 of the crankshaft 41 is in a position where it contacts the inclined cam 60. FIGS. 6 and 7 show these operations. In the drawings, the same or corresponding parts as in FIGS. 3 and 4 are designated by the same reference numerals, and their explanations will be omitted.

As shown in FIG. 6, the crank arm 43 is pushed by the rack 17, and the L-shaped crank arm 42 of the crankshaft 41 rotates while pushing the curved slope 60' of the inclined cam 60, so the subchassis 14 does not rotate. and descend.

Missing; 2. When the slide table 12 is closed as shown in FIG. Then, the sub-chassis 14 rises.

In this case, if the L-shaped crank arm 42 of the crankshaft 41 has a roller structure, smoother operation can be obtained.

Roughly speaking, in FIG. 8, the rocker 6 is attached to the inclined cam 60.
1. The locker 61 is a subshear v
This is to prevent L4 from falling when it is in the raised position. By providing this rocker 61, even if a force is applied to lower the sub-chassis 14 as shown in FIG. is maintained. Furthermore, even if a vertical motion or impact is applied to the L-shaped crank arm 42 of the crankshaft 41, the point of application of this force and the direction of the force are
'E vs.

The shape of the crank arm 42,0 and the shape of the inclined cam 60 are designed to prevent a rotational moment that would cause the crankshaft 41 to rotate from the rear to the front of the playback device main body 11.

Since the arrangement tt is set, the sub-chassis 14 is prevented from rotating in the downward direction and is restrained.

By adopting such a mechanism, strong vibrations and shocks are applied in the vertical direction after the disk 18 starts rotating.
Even if a downward force is exerted on the sub-chassis 14, the downward movement is stopped and the disk rotating once and the elbow are moved to the slide table material (-
It is possible to prevent scratches and damage caused by contact, and a safer and more reliable playback device can be realized. Further, the rocker 61 may be provided at both the lower end and the upper end of the inclined cam 60.

Further, in the embodiment, the reciprocating mechanism 20 is a carriage 16,
Rack 17. The spring 29 is used to drive the motor 30 for loading and unloading as well as for transporting the pickup head. Therefore, the reciprocating mechanism may be, for example, just the rack 17 as long as it moves back and forth, and is not limited to the two examples mentioned above.

〔Effect of the invention〕

As described in detail above, according to the present invention, there is no hole in the slide table for passing the elevating plate, and the slide table becomes stronger against vertical forces, so the slide table can be made thinner. .

In addition, the sub-chassis incorporating the turntable can be rotated within a small angle range by a combination of a crank fitting, a reciprocating mechanism, and a transmission member.
The turntable is moved up and down and is held in place by a disc clamper. As a result, the number of mechanisms for lifting and lowering is reduced from two to one, which has a significant effect on reducing the number of parts and making the equipment lighter and lighter.

[Brief explanation of the drawing]

FIG. 1 is an overall perspective view of one embodiment of the recording disk loading mechanism of the present invention, FIG. 2 is a perspective view of the main chassis/front part of the present invention, and FIGS. FIG. 5 is a perspective view of the front part of a nap chassis according to another embodiment of the present invention; FIG. 7 is an explanatory diagram of a loading operation according to another embodiment of the present invention;
8 and 9 are perspective views and partial explanatory views of the front part of the subchassis according to other embodiments of the present invention, FIGS. 10 and 11 are external views of the conventional and inventive devices, and FIG. 14th from the figure
This figure is an explanatory diagram of the operation of a conventional loading mechanism, and FIG. 15 is an explanatory perspective view of a portion of a conventional disc clamper. 12... Slide table 13... Main shaft 14... Chip chassis 19... Reciprocating mechanism 21... Turntable motor 4... Turntable transmission member 27... Disc clamper Road...Center stay 40...Slit hole 41...Crankshaft 42-...Crank arm invitation...Crank arm 60...Incline cam (@tachi member) 6
1... Locker agent Patent attorney Kensuke Chika (and 1 other person) No.
2 Figure 5 Figure S Figure 9 Figure 12 Figure 14

Claims (1)

[Scope of Claims] A main chassis, a sub-chassis supported by the main chassis so as to be movable up and down with respect to the main chassis, a turntable placed on the sub-chassis and rotationally driven by a turntable motor, a slide table for transporting a recorded disc to a position that coincides with the center of rotation of the turntable; a disc clamper rotatably attached to a center steer fixed to the main chassis; and a disc clamper rotatably attached to the main chassis. A crankshaft is attached to the main chassis, and a crank arm is fixed to both ends of the crankshaft. A recording disk loading mechanism comprising: a reciprocating motion mechanism for transmitting rotational motion of the other crank arm to the subchassis; and a transmitting member attached to the subchassis to transmit the rotational motion of the other crank arm to the subchassis. (2) A claim characterized in that the transmission member includes an inclined cam along which the other crank arm moves, and a rocker provided at at least one end of the inclined cam and engaged with the other crank arm. The loading mechanism of the recording disk according to item 1.