CN101118766B - Disk unit - Google Patents

Abstract

A slot-type disk device in which the front end of the lifting bracket is swung to clamp the optical disk, and no opening is formed at the bottom of the case where the end of the sub-guide shaft and the end of the bracket block face each other. Therefore, the rigidity of the bottom of the box will not be reduced, and noise such as search sounds can be prevented from leaking out of the device and dust can be intruded into the device, and the gap for focus adjustment of the optical pickup can be enlarged. . A disk drive mechanism and an optical pick-up unit are arranged on the lifting bracket. The above-mentioned disk drive mechanism is composed of a turntable with a chuck and a spindle motor. Moving up and down, the clamping or clamping release of the center hole of the disk involved in the above-mentioned chuck can be carried out. Wherein, when the sub-guide shaft supporting the bracket block of the above-mentioned optical pickup unit is lowered together with the lifting bracket, The descent of the end portion of the sub guide shaft is restricted.

Description

disk device

technical field

The present invention relates to optical discs (for example, CD-R/RW, DVD-R/-RW/RAM/+R/+RW, etc.) Disk device to drive.

Background technique

Generally speaking, in personal computers (hereinafter referred to as personal computers), etc., there are built-in disk devices for driving optical discs. improvements. Generally, there are three different ways of loading an optical disc in such a disc device: 1. The method of loading the optical disc on the disc holder; 2. The method of directly loading the optical disc on the chuck of the disc holder; And 3. The way of inserting the CD from the front cover.

In the disc device of the above-mentioned slot type, the loading (feeding) of the optical disc into the device body is through the operator inserting a part of the optical disc into the notch of the front cover, and then the loading mechanism in the device operates to automatically load the optical disc. , because no disk tray is used, it is the most possible thinning method among the above-mentioned methods.

42 to 44 show the configuration and operating state of a loading mechanism in a conventional slot-type disk device. In the configuration shown in each figure, when the operator inserts the disc from the notch of the front cover, the disc D passes through the pin 100a at the tip of the first swinging body 100, the left and right guides 101, 102, and the second swinging body 103 on the way thereafter. The pointed pin 103a guides the height direction and the left-right position, and reaches the position shown in FIG. 42 .

At this time, the first oscillating body 100 rotates in the direction of the arrow 100A by pressing the pin 100a at the tip of the disc D, and the second oscillating body 103 also rotates in the direction of the arrow 103A by pressing the pin 103a at the tip of the disc D. direction rotation. In addition, the switch lever 104 is pushed by the end of the second swinging body 103 to rotate in the direction of the arrow 104A, and the detection switch 105 is operated.

When the detection switch 105 is actuated, the driving device 106 is activated to start moving in the direction of the arrow 107A of the first slide member 107 . Each tip of the first sliding member 107 and the second sliding member 108 is connected together with a sliding connecting member 109. Since the sliding connecting member 109 is pivotally supported by the pin 110 in a swingable manner, the second sliding member 108 and the first sliding member 108 are connected together. The retreat of the slide member 107 advances in the direction of the arrow 108A synchronously.

In this way, when the first sliding member 107 starts to retreat, the first oscillating body rotates in the direction of arrow 100B, whereby the pin 100a at the tip of the first oscillating body 100 sends the optical disk D in the direction of arrow 107A until it is positioned with the disk. until the pins 111a, 111b of the member 111 come into contact (FIG. 43).

At this time, since the pin 103a of the second oscillating body 103 rotates in the direction of the arrow 103A, the pin 103a of the second oscillating body 103 is synchronized with the pin 100a at the tip of the first oscillating body 100, so that the optical disk D is aligned with the disk positioning member 111. After the pins 111a and 111b are butted together, they are rotated to a position slightly away from the optical disk D.

The above is the operation form of the loading mechanism when the optical disk D is loaded into the device, and the operation form of the loading mechanism when the optical disk D is sent out of the device is the reverse operation form. That is, when the optical disk D is positioned inside the device, according to the instructions of unloading (sending), when the driving device 106 starts in the reverse direction, the first slide member 107 starts to advance in the direction of arrow 107B, and the second slide member connected to the slide member connecting member 109 starts to advance in the direction of arrow 107B. The sliding member 108 starts to retreat in the direction of the arrow 108B synchronously. As a result, the first swinging body 100 rotates in the direction of arrow 100A, and the second swinging body 103 rotates in the direction of arrow 103B. Therefore, the optical disc D is held by the tip pins 100a, 103a and sent out of the device.

In addition, the optical disc D fed into the apparatus is clamped at a predetermined position by the chuck 112 which moves up and down. The collet 112 is integrated with the turntable 113 fixed on the drive shaft of the spindle motor 114. Further, the spindle motor 114 is arranged on the lifting bracket 115, and the lifting bracket 115 is moved up and down by means of the lifting mechanism. The above-mentioned elevating mechanism is formed with crank-shaped cam grooves of the same shape as shown in FIG. 44 on the side surfaces of the first slide member 107 and the second slide member 108. Make the lifting bracket 115 move up and down.

In the same figure, the part of the first sliding member 107 is illustrated, and the driven pins 116a, 116b fixed on the elevating bracket 115 cooperate with the cam grooves 107a, 107b, so that, as shown in FIG. 44(A), the driven pins 116a, 116b When 116b is at the low position of the cam grooves 107a, 107b, the lifting bracket 115 is in the lowest state. Moreover, as the first sliding member 107 moves horizontally in the direction of arrow 107A, the inclined parts of the cam grooves 107a, 107b are raised by the follower pins 116a, 116b, and the elevating bracket 115 is raised to the highest position of the cam grooves 107a, 107b. , as shown in FIG. 44(B), the chuck 112 clamps the optical disk D and fixes it on the turntable 113. From this state, when the first sliding member 107 moves further in the direction of the arrow 107A, the follower pins 116a, 116b, as shown in Figure 44 (C), slightly descend to the high positions of the cam grooves 107a, 107b and stop, so that the optical disk D in a drivable state.

Patent Document 1: Japanese Unexamined Patent Application Publication No. 2002-117604.

Contents of the invention

The problem to be solved by the invention

Like this, under the situation that adopts above-mentioned disc device to constitute, chuck head descends to the position that can be sent into optical disk, on the other hand, must have the stroke width that guarantees chuck head moves up and down, so that chuck head can rise to the position of clamping optical disk. Location. Therefore, in the case of adopting the lifting mechanism of the conventional disk device, although the lifting frame moves up and down in a horizontal state, since the stroke width of the vertical movement of the lifting frame is always set constant, when the thickness of the lifting frame is increased, The overall thickness of the disk device also increases, and the mechanism for raising and lowering the lift frame in a horizontal state is complicated, which is disadvantageous for miniaturization and thinning.

On the other hand, instead of raising and lowering the elevating frame in a horizontal state, the front end of the elevating frame can be swung to clamp and release the disc. In this way, the elevating frame arranged on the main shaft motor is arranged along the direction of the diagonal line inside the device. The front end swings in the up and down direction.

However, since the above-mentioned elevating bracket is arranged along the diagonal direction inside the device, when the front end portion is lowered with the base end portion as the rotation axis, the most protruding portion in the bottom surface direction becomes the bracket on which the optical pickup is assembled. The end of the block and the tip of the auxiliary guide shaft that guides and supports the bracket block. In this way, since the thickness of the entire device is determined by the installation height position of the sub-guide shaft, it is necessary to minimize the protruding degree of the end portion of the sub-guide shaft.

In view of this, an opening is formed at the bottom of the box where the end of the auxiliary guide shaft and the end of the bracket block are facing each other when the lifting bracket is lowered, so as to avoid the contact between the two ends and the bottom of the box and not increase the size of the disk. The thickness of the box corresponds to this. However, the formation of such an opening reduces the rigidity of the disc cartridge, and at the same time, within the device, noise such as tracking noise leaks to the outside of the device and dust enters the inside of the device due to the movement of the tray block. question.

In addition, in the above-mentioned conventional structure, the inclination adjustment mechanism, that is, the adjusting screw that fixes the end of the guide shaft, is rotated to move the end of the guide shaft up and down, thereby realizing the up and down movement of the bracket block and performing the relative movement of the optical pickup. For the focus adjustment of the disk, however, since the existence of the above-mentioned problems limits the protruding degree of the end portion of the sub-guide shaft to the bottom surface direction, the gap for focus adjustment cannot be increased.

The way to solve the above problems

In view of this, the present invention solves the above-mentioned problems by the following various means. That is, the first invention is a disc device, wherein a disc drive mechanism and an optical pickup unit are provided on an elevating frame, the disc drive mechanism is composed of a turntable having a chuck and a spindle motor, and the optical pickup unit can be positioned relative to the chuck. The radial direction of the disk advances and retreats, and the lifting bracket moves up and down, so that the center hole of the disk involved in the chuck can be clamped or released. Among them, the bracket block of the optical pickup unit is supported. When the sub-guide shaft is lowered together with the elevating frame, the lowering of the end portion of the sub-guide shaft is restricted.

According to a second invention, in the disc device according to the first invention, a support protrusion facing the end of the sub-guide shaft is formed on the bottom of the case, and the end of the sub-guide shaft is restrained by the support protrusion when the elevating frame is lowered. Ministry of decline.

According to a third invention, in the disc device according to the first invention, a support protrusion facing the bottom of the case is formed at the end of the sub-guide shaft, and the end of the sub-guide shaft is restrained by the support protrusion when the elevating bracket is lowered. Ministry of decline.

The effect of the invention

According to the present invention, in the slot-type disc device in which the disc clamping operation is performed by swinging the front end of the elevating frame, the bottom of the case where the end of the sub guide shaft and the end of the bracket block face each other position, no openings are formed, and the overall thickness of the device can be reduced. Therefore, without lowering the rigidity of the bottom of the case, it is possible to prevent noise such as search sounds from leaking out of the device and dust from entering the device, and at the same time, the gap for focus adjustment of the optical pickup can be increased.

Description of drawings

FIG. 1 is a perspective view showing the appearance of a disk drive embodying the present invention.

FIG. 2 is a plan view showing a state where a cover is removed from the disk drive of FIG. 1 .

Fig. 3 is a perspective view showing a state in which a cartridge cover is removed from the disk device of Fig. 1 .

Fig. 4 is a plan view showing a state in which a case bottom is removed from the disk drive of Fig. 1 .

FIG. 5 is a diagram illustrating a drive mechanism for moving the optical pickup unit forward and backward.

Fig. 6 is a sectional view illustrating a supporting structure of the elevating stand.

Fig. 7 is a cross-sectional view illustrating a supporting structure of the elevating frame.

Fig. 8 is a perspective view illustrating the structure of a disc support arm.

Fig. 9 is a plan view illustrating a drive mechanism of a disk holding arm.

Fig. 10 is an exploded perspective view of the main part of the drive mechanism of the disc holding arm.

FIG. 11 is a diagram illustrating the configuration of a disk transfer mechanism.

FIG. 12 is a diagram illustrating the configuration of a disk transfer mechanism.

Fig. 13 is a perspective view illustrating the constitution of the rack and pinion unit.

Fig. 14 is an exploded perspective view illustrating the structure for driving the guide arm.

Fig. 15 is a diagram illustrating a first stroke of the operating state of the guide arm.

Fig. 16 is a diagram illustrating a second stroke of the operating state of the guide arm.

Fig. 17 is a diagram illustrating a third stroke of the operating state of the guide arm.

Fig. 18 is a diagram illustrating a fourth stroke of the operating state of the guide arm.

Fig. 19 is a diagram illustrating a fifth stroke of the operating state of the guide arm.

Fig. 20 is a diagram illustrating a first stroke of the operating state of the disk holding arm.

Fig. 21 is a diagram illustrating a second stroke of the operating state of the disk holding arm.

Fig. 22 is a diagram illustrating a third stroke of the operating state of the disk holding arm.

Fig. 23 is a diagram illustrating a fourth stroke of the operating state of the disk holding arm.

Fig. 24 is a diagram illustrating a fifth stroke of the operation state of the disk holding arm.

Fig. 25 is a diagram illustrating a sixth stroke of the operating state of the disk holding arm.

Fig. 26 is a diagram illustrating a seventh stroke of the operating state of the disk holding arm.

Fig. 27 is a diagram for optically explaining the operation state of the disc support arm when the disc is ejected.

FIG. 28 is a diagram illustrating an example of a positional relationship between a cam groove and a follower pin.

Fig. 29 is a diagram illustrating an example of an operation state when the elevating frame is raised.

Fig. 30 is a diagram illustrating an example of an operation state when the elevating frame is lowered.

Fig. 31 is an exploded perspective view of the assembled state of the guide shaft.

Fig. 32 is a diagram explaining the lowered state of the elevating stand.

Fig. 33 is a diagram illustrating a lowered state of the sub guide shaft.

Fig. 34 is a diagram illustrating a lowered state of the sub guide shaft.

Fig. 35 is a diagram illustrating the configuration of the present invention.

Fig. 36 is a diagram illustrating the function of the present invention.

Fig. 37 is a diagram illustrating the function of the present invention.

Fig. 38 is a diagram showing an example of another configuration of the present invention.

Fig. 39 shows an example of the structure of the sub guide shaft.

Fig. 40 is a diagram illustrating the function of the present invention.

Fig. 41 is a diagram illustrating the function of the present invention.

Fig. 42 is a diagram illustrating a first pass in an operating state of a conventional disk device.

Fig. 43 is a diagram illustrating a second pass in the operating state of a conventional disk device.

Fig. 44 is a diagram for explaining the operation state of the lift frame of the conventional disk device.

Symbol Description

1...disk device

2…disc case,

2A…box cover

2B…Box bottom

2C...Support convex part

3…front cover

6…base panel

7…Turntable

8... Chuck

9...Spindle motor

10...Lifting bracket

11·12…Follower pin

13…optical pickup

14...bracket block

15...Main steering shaft

16...Auxiliary guide shaft

16b...Support convex part

17…Screw shaft

18…Gear train unit

19…Helical motor

20… Nuts

21…column pin

22…gasket

23...buffer parts

24…pan support arm

25…cage

26...support plate

27...pivot pin

28...1st connecting arm

29…extension coil spring

30...2nd connecting arm

32…lever arm

33…Lock lever

34…Torsion coil spring

35…Limit switch

36...starter pin

37…Loading motor

38…worm

39·40·41… Pair of gears

42…Gear base

43…cage

44…pivot pin

45…Compression coil spring

46…Limit switch

47…Slider components

48…pivot pin

49…extension coil spring

50…Loading sliders

51…lever arm

52…Gear parts

53…Push pin

54…pairs of gears

55…Gear rack

56…Action slices

57…guiding arm

58…Follower pin

59…pivot pin

60...pivot pin

61…Roller

62…sliding parts

63…Connecting rod parts

64...Release pin

70…Adjusting screw

71 . . . helical spring.

Detailed ways

Hereinafter, embodiments of the present invention will be described in detail based on the drawings. In addition, in order to understand this invention more easily, the outline|summary of a known structure is demonstrated.

FIG. 1 is a diagram showing the appearance of a slot-type disc device 1 embodying the present invention. A disc case 2 in a shield state is formed by combining a case cover 2A and a case bottom 2B. At the center of the top plate of the case cover 2A, an opening 2a, which will be described later, facing a chuck is formed, and a convex portion 2b protruding into the device is formed at an opening peripheral portion of the opening 2a.

A front cover 3 is disposed on the front end of the disc case 2, and a notch 3a for inserting an optical disc D and through holes 3b and 3c for emergency relief are formed on the front cover 3. In addition, the front cover 3 is provided with a button 4 for instructing the storage of the optical disc D to be sent out of the device, and an indicator 5 for indicating the operating state of the disc device 1 .

FIG. 2 is a plan view showing a state in which the case cover 2A of the disk drive 1 is removed, and FIG. 3 is a perspective view thereof. In this figure, a base panel 6 is arranged on the bottom 2B of the box, and an elevating frame 10 is arranged obliquely downward from the center thereof, that is, along a diagonal direction inside the device. A drive unit A that drives an optical disc D is provided.

The drive unit A is mainly composed of a spindle motor 9 that fixes the turntable 7 and chuck 8 to the drive shaft, and the support plate 9a fixed to the spindle motor 9 is fixed to the elevating frame 10 with screws through a frame member 10d. . Thus, the elevating frame 10 moves up and down, whereby the center hole Da of the optical disc D is clamped by the chuck 8 and held on the turntable 7 . In addition, the vertical movement of the above-mentioned elevating frame 10 is performed by guiding the follower pins 11·12 fixed on the elevating frame 10 by the elevating mechanism described later.

Further, on the above-mentioned elevating bracket 10, as shown in FIG. 4 of the state where the box bottom 2B is removed, a drive mechanism is arranged on the bracket block 14, and the drive mechanism is used to make the optical pickup with the optical pickup 13 assembled. Unit B advances and retreats, and Figure 5 shows the composition of its main parts. As shown in the drawing, the drive mechanism is supported by a main guide shaft 15 and a sub guide shaft 16 fixed to a frame member 10d integral with the elevating frame 10, and moves forward and backward.

A screw shaft 17 parallel to the main guiding shaft 15 is arranged on the lifting bracket 10 , and the driving force of the helical motor 19 is transmitted to the screw shaft 17 by means of a gear train unit 18 . Thereby, the nut 20 engaged with the guide groove 17a of the screw shaft 17 is driven, and the bearing portion 14a integrated with the bracket block 14 holding the nut 20 is guided by the main guide shaft 15 to reciprocate. In this way, the optical pickup 13 incorporated in the carriage block 14 moves parallel to the recording surface of the optical disc as the carriage block 14 reciprocates, and performs recording or reproduction of information.

As mentioned above, the center hole Da of the optical disk D is clamped or the clamping state is released by means of the chuck 8 which moves up and down through the lifting bracket 10. Next, it is installed on the base panel 6, so that the lifting bracket 10 can be lifted. That is, in FIG. 4, support tongues 10a, 10b, and 10c are integrally extended at three places on the outer periphery of the elevating frame 10, and on the inside of the base panel corresponding to the positions of the support tongues 10a, 10b. , as shown in FIG. 6, a columnar pin 21 formed by an appropriate method such as end calendering treatment is erected.

Further, a flexible buffer member 23 is attached to the columnar pin 21 via a washer 22 , and the support tongues 10 a and 10 b are attached to grooves 23 a formed in the buffer member 23 . On the other hand, as shown in Figure 7, the support tongue 10c is supported by the buffer member 23 installed on the cylindrical pin 21 without a gasket, and by supporting the tongue 10a·10b, the stroke of the up and down movement is expanded, and the elevating bracket 10 is swingable. In addition, the other end of the cylindrical pin 21 is fixed to the case bottom 2B with screws.

Next, the drive mechanism C that functions to carry in and out the optical disk D will be described. The end of the disc support arm 24 with the holder 25 at the tip as the pivot point is inside the base panel 6, as shown in FIG. Therefore, as the support plate 6 rotates, the disk support arm 24 on the base panel 6 swings within the range of the slit 6a. As shown in FIG. 8, the holder 25 of the disk support arm 24 has a receiving end 25a at the tip and a holding groove 25b at the side.

9 shows the state of the driving mechanism C that constitutes the disk support arm 24 after the base panel 6 is removed, the first connecting arm 28 that directly drives the disk support arm 24 is connected by the pivot pin 26a of the support plate 26, and is always controlled by The tension coil spring 29 exerts force. On the other hand, on the second connecting arm 30, as shown in FIG. Therefore, the first connecting arm 28 and the second connecting arm 30 can expand and contract within the range of the slits 30a·30b. Moreover, in the first connection arm 28 and the second connection arm 30, notched portions 28c and 30c for functioning of a locking mechanism described later are formed.

Reference numeral 32 is a lever arm for transmitting a driving force to the second link arm 30, and a through hole 32a serving as a fulcrum is pivotally supported by a pivot pin 32d so as to be able to swing. A pivot pin 32 b is fixed to an operating end of the lever arm 32 , and the pivot pin 32 b is inserted through the through hole 30 d of the second connecting arm 30 and the through hole 33 a of the lock lever 33 . Furthermore, a torsion coil spring 34 is disposed between the second link arm 30 and the lock lever 33, and one end 34a of the torsion coil spring 34 is engaged with the groove portion 30e of the second link arm 30, and the other end 34b is engaged with the groove portion 30e. In the groove portion 33 b of the lock lever 33 .

As a result, the engagement end 33c of the lock lever 33 is biased in the direction in which the notch portion 28c of the first link arm 28 engages with the notch portion 30c of the second link arm 30 . In addition, in the inside of the base panel 6, when the first connecting arm 28 is at a given angle, the limit switch 35 that operates by pushing the switch lever 35a by means of its rear end is arranged. 2B is vertically provided with a trigger pin 36 for pushing the rear end portion 33d of the lock lever 33 when the second link arm reaches a predetermined position.

Next, the configurations of the slider mechanism and the transport mechanism, which are elements that transmit power to the drive mechanism C of the disk support arm 24, will be described. The conveying mechanism is roughly constituted by a combination of the loading gear unit G1 and the rack and pinion unit G2. First, the configuration and operation of the loading gear unit G1 will be described with reference to FIGS. 11 and 12 . In this figure, reference numeral 37 denotes a loading motor as a power source, and a worm 38 is fixed to rotate coaxially on the output shaft of the loading motor 37, and the rotational force of the worm 38 is sequentially supplied to the bearing supported on the gear base 42. For the gear 39.40.41, the small-diameter gear is decelerated and transmitted to the large-diameter gear.

In the gear structure described above, the counter gear 39 is provided with a release mechanism for releasing the meshed state with the worm 38 . In this way, while holding the counter gear 39, the end 43a of the holder 43 slidable in the vertical direction is inserted into the pivot pin 44, and the compression coil spring 45 is biased downward, and the holder 43 is The end portion 43a is pivotally supported so that, in a normal state, as shown in FIG. 11(C), the worm 38 and the counter gear 39 are in a normal meshing state. In addition, at the end of the holder 43 on the side of the loading motor 37 , a sweetheart chuck 43 b is formed to operate the button 46 a of the limit switch 46 fixed on the gear base 42 .

On the lower surface of the end portion 43 a of the above-mentioned holder 43 , a slider member 47 is provided that is pivotally supported coaxially with the pivot pin 44 . A long groove 47 a is formed in a portion pivotally supported by the pivot pin 44 of the slider member 47 so as to be slidable in a direction perpendicular to the end portion 43 a of the holder 43 . In addition, the slider member 47 is formed with an inclined surface 47b between the front end and the rear end. When the slider member 47 is advanced, the inclined surface 47b pushes the end portion 43a of the holder 43 upward from the bottom surface, and the holder 43 as a whole rise.

In addition, at the rear end of the above-mentioned slider member 47, a long groove 47d with an engaging step portion 47c is formed, and the engaging step portion 47c is pivotally supported on the pivot pin 48. Further, at the rear end of the slider member 47 An action piece 47f with an engaging protrusion 47e is also formed on the portion. On the other hand, on the front end portion of the slider member 47, there is formed a reset piece 47g activated corresponding to the movement of the rack and pinion unit G2.

The slider member 47 integrally formed in this way is provided with a tension coil spring 49 for applying torque between the hook piece 47h and the hook piece 42a of the gear base 42 in an oblique shape, and the slider member 47 is subjected to elastic force. , and usually moves backwards while rotating counterclockwise.

By configuring the slider member 47 as described above, the slider member 47 uses the pivot pin 44 as a fulcrum in the normal state shown in FIG. 11 . In this state, the slider member 47 is pushed forward from the rear end, and when the engaging step portion 47c of the elongated groove 47d reaches the position of the pivot pin 48, the tension of the tension coil spring 49 is applied. , the slider member 47 rotates with the pivot pin 44 as a fulcrum, and as shown in FIG. 12 , the engaging stepped portion 47c is engaged with the pivot pin 48 to be in a locked state, and this posture is maintained.

Next, in the rack and pinion unit G2, as shown in FIG. 13, tooth rows 50a and 50b are integrally formed on the loading slider 50, and the tooth rows 50a mesh with the small-diameter gears of the counter gear 41 of the loading gear unit G1. Thus, by driving the loading motor 37, the loading slider 50 advances or retreats within the disk cartridge 2. As shown in FIG. Then, by moving the loading slider 50 forward or backward, driving the driving mechanism C connected to the tip of the loading slider 50, the disk support arm 24 swings, and at the same time, as shown in FIG. With the lever arm 51 connected to the loading slide 50, the guide arm 57 is swung.

On the loading slider 50 constituted in this way, a gear member 52 that advances and retreats near the tip of the loading slider 50 is arranged in a floating state. · Push pin 53 of 53b. Further, the tooth row 50 b and the gear member 52 are meshedly connected to a counter gear 54 rotatably attached to a carrier 55 . In this case, the large-diameter gear 54a of the counter gear 54 meshes with the rear end of the tooth row 50b, and the small-diameter gear 54b meshes with the tip of the gear member 52 integrally formed with the above-mentioned block 53b.

Thus, when the gear member 52 is pushed by the external force of the push pin 53, the counter gear 54 rotates to a predetermined position, so the rotational force of the large-diameter gear 54a is transmitted to the tooth row 50b, and the loading slider 50 is moved. In addition, reference numeral 56 is an action piece for pushing the reset piece 47g formed at the tip of the slider member 47 of the loading gear unit G1, and the action piece 56 pushes the loading gear unit G1 in the state shown in FIG. When the reset piece 47g of the slider member 47 is pressed, the engagement between the pivot pin 48 and the engaging step portion 47c is released, so that the state shown in FIG. 11 is restored.

Next, the configuration and operating state of the guide arm 57 driven by the loading slider 50 will be described. Fig. 14 shows the structure for driving the guide arm 57. On the base panel 6 at the position overlapping with the guide groove 50d formed on the loading slider 50, a guide groove 6b is formed. When the follower pin 58 is inserted into the guide groove 50d and the guide groove 6b, the interaction with the guide groove 6b at a predetermined position relative to the advance and retreat guide groove 50d controls the movement of the follower pin 58.

As shown in FIG. 15 , the guide arm 57 pivotally supports the lever arm 51 via a pivot pin 60 at a base end portion rotatably supported by a pivot pin 59 . A holding groove for the optical disc D is formed at the tip of the guide arm 57, and a roller 61 is arranged inside the holding groove. Since the guide arm 57 has such a structure, it can swing in the disc cartridge 2 in accordance with the movement of the lever arm 51, and the optical disc D can be fed into the apparatus.

15 to 19 show the operating state of the above-mentioned guide arm 57. FIG. 15 is a state in which the optical disc D is inserted into the disc device 1 by the operator. Swing backward, the first connecting arm 28 makes the limit switch 35 act, and the driving mechanism C is in the initial state of starting to work. Therefore, as shown in the figure, the loading slider 50 is positioned at the front end, and the lever arm 51 is positioned at the rear end of the guide groove 50d.

In this state, when the driving mechanism C starts to operate, as shown in FIG. 16, the loading slider 50 starts to retreat. At this time, since the driven pin 58 is in the state clamped by the inclined surface of the rear end of the guide groove 50d and the side wall of the guide groove 6b, so, as the loading slider 50 advances, the driven pin 58 then retreats, and the driven pin 58 is moved by the drawbar arm 51. , the guide arm 57 swings, the optical disc D is held by the holder 25 of the disc support arm 24, and the feeding of the optical disc D starts.

Fig. 17 shows that the loading slider 50 is further retreated, and the follower pin 58 reaches the top of the guide groove 6b. With the help of the swing of the guide arm 57, the feeding of the optical disc D is continued, and the central hole Da of the optical disc D reaches the position consistent with the chuck 8. status. FIG. 18 shows a state in which the loading slider 50 is slightly retreated from the position in FIG. 17, and the follower pin 58 is in a state in which it is pressed into the horizontal groove at the top of the guide groove 6b by the guide groove 50d.

Fig. 19 is the state where the loading slider 50 retreats to the final position. During the process from Fig. 18 to Fig. 19, the follower pin 58 is further pressed into the top transverse groove of the guide groove 6b by means of the long groove at the front end of the guide groove 50d middle. Thereby, the guide arm 57 retreats slightly from the position indicated by the dotted line in the figure, and the holding of the optical disk D is released. 16 to 19 above, the central hole Da of the optical disk D is clamped by the chuck 8 and held on the turntable 7.

Next, the operating state of the disk support arm 24 will be described. The drive mechanism C for driving the disk support arm 24 is constituted by assembling the mechanism elements shown in FIG. That is, in FIG. 20, a follower pin 32c is installed in a guide groove 50e formed on the loading slider 50, and the follower pin 32c is fixed to the end of the lever arm 32 and guided by the guide groove 50e.

The state shown in this figure shows the initial stage of the state where the operator inserts the optical disc D from the notch 3a of the front cover 3, and accommodates the front end of the optical disc in the receiving end portion 25a of the holder 25 at the tip of the disc support arm 24. state. At this moment, since the rear end portion 33d of the lock lever 33 is pushed by the activation pin 36, the engagement end 33c is not located between the notches 28c·30c of the first and second connecting arms 28·30. status.

21 and 22 show step by step the state in which the operator pushes the optical disc D further into the device, and the disc support arm 24 swings backward to pull the first arm connected to the base end of the disc support arm 24 by the pivot pin 24a. 28. At this time, since the lever arm 32 is connected to the stationary loading slider 50, the second connecting arm 30 connected thereto is held at a predetermined position. Therefore, the first link arm 28 is in a state of being able to slide and extend on the second link arm 30 . And, when reaching the state of FIG. 22, the limit switch 35 is forced to operate.

FIG. 23 shows a state in which the loading slider 50 is continuously retreated by starting to drive the conveying mechanism based on a signal from the limit switch 35 operating in the above-mentioned manner. The lever arm 32 swings through the guide groove 50e of the loading slider 50, and the second connecting arm 30 slides and advances along with the first connecting arm 28, so that the engaging end 33c of the locking lever 33 released by the push of the activation pin 36 Between the notches 28c·30c of the first and second connecting arms 28·30, the first and second connecting arms 28·30 are in an integrated locked state. 22 to 23, the above-mentioned guide arm 57 is activated, and the holder 25 of the disc support arm 24 holds the optical disc D together with the guide arm 57.

FIG. 24 shows a state where the loading slider 50 is further retreated, and the disc support arm 24 is swung backward, and the disc D is fed in, and the central hole Da thereof coincides with the chuck 8 . In addition, at this point, the optical disk D is held by the holder 25 of the disk holding arm 24 together with the guide arm 57 , and the disk holding arm 24 swings in synchronization with the guide arm 57 . Furthermore, in the process from the state of FIG. 24 to FIG. 25, the chuck 8 rises to clamp the center hole Da of the optical disc D. As shown in FIG.

26 shows a state where the loading slider 50 is slightly retreated after the chuck 8 clamps the central hole Da of the optical disk D, whereby the lever arm 32 swings slightly at the end of the longitudinal groove of the guide groove 50e of the loading slider 50, as shown in FIG. As shown in this figure, since the disk support arm 24 and the guide arm 57 swing slightly, the holding of the optical disk D can be released, and the optical disk D can be driven by the action of the turntable 7 .

The above is the operating state of the drive mechanism C when the optical disc D is fed in, but when the optical disc D is sent out, it can follow the opposite path, and the constituent elements of each part perform the opposite action. That is, the transport mechanism E is reversely driven to advance the loading slider 50, and the disk support arm 24 swings forward from the state shown in FIG. 26 to the state shown in FIG. 23. In the state shown in FIG. Dock with starter pin 36. And when the loading slider 50 is further advanced, the said rear-end part 33d will be in the state pushed by the activation pin 36. As shown in FIG.

Thereby, as shown by the dotted line in FIG. 27, the engaging end 33c of the locking lever 33 swings and disengages from the notch portion 28c of the first connecting arm 28 and the notch portion 30c of the second connecting arm 30, and releases the first connecting arm. 28 and the second connecting arm 30 integrated locking state, at the same time, under the elastic force of the tension coil spring 39, the disk support arm 24 swings to the position shown in Figure 20, at the last moment of the final process of sending out , causing the disc D to fly out from the notch 3a suddenly, ending sending out. In addition, when the above-mentioned state is reached, although the elevating frame 10 is in the lowermost state, at this moment, since the bracket block 14 moves to the side of the swing fulcrum of the elevating frame 10, contact with the box bottom 2B can be avoided.

Next, the configuration and operation of the lifting mechanism for moving the lifting frame 10 up and down will be described. As can be seen from Fig. 2 and Fig. 9, as the elevating support 10 of the disc device of the present invention, since it is arranged along the diagonal direction inside the device, it is in an inclined state, and its rear end becomes a corner extending into the body. status of the department. In such a configuration, the swing fulcrum of the elevating frame 10 is usually the axis S-S in the figure, and the tip of the elevating frame 10, that is, the collet 8 is in a state of moving up and down using it as the axis.

At this time, when the distance from the axis S-S to the driven pin 11 is L11, and the distance from the axis S-S to the driven pin 12 is L12, since L11<L12, the vertical movement of the driven pin 12 is greater than that of the driven pin 11. That is, the vertical movement distance of the driven pins 11·12 is proportional to the distance from each driven pin to the axis S-S, if the vertical movement distance of the driven pin 11 is H11, and the vertical movement distance of the driven pin 12 is H12, then H11/L11 =H12/L12 is established.

The elevating mechanism of the above-mentioned elevating bracket 10 is constituted by the driven pin 11·12, the cam groove 50c formed on the loading slider 50, and the cam groove 62a formed on the slide member 62. However, as mentioned above, since the driven pin 11 and the The distances from the follower pin 12 to the axis S-S are different, so the above-mentioned cam grooves 50c·62a coincide with the traces of the vertical movement of the follower pin 11·12. FIG. 28 shows cam grooves 50c·62a formed in response to such conditions.

FIG. 28(A) shows the shape of the cam groove 50c formed in the loading slider 50, and FIG. 28(B) shows the shape of the cam groove 62a formed in the slide member 62. As shown in FIG. Moreover, the state of the follower pin 11 in the cam groove 50c which changes with the advance and retreat of the loading slider 50 in the X1-X2 direction is shown by position J0-J5. Moreover, the state of the follower pin 12 in the cam groove 62a which changes with the advance and retreat of the loading slider 62 in the Y1-Y2 direction is shown by position K1-K5.

In addition, the end of the slider member 62 is connected to the action pin 63a fixed to the end of the link member 63, and the other end of the link member 63 is provided with a follower pin 63b, and the follower pin 63b is connected to the guide of the loading slider 50. Slot 50f. Furthermore, since the fulcrum 63 c of the link member 63 is rotatably supported by the shaft, the slide member 62 advances and retreats in synchronization with the advance and retreat of the loading slider 50 . Therefore, the cam grooves 50c and 62a also advance and retreat synchronously, the follower pin 11 moves up and down within the range of the height H11 of the cam groove 50c, and the follower pin 12 moves up and down within the range of the height H12 of the cam groove 62a.

The lower part of the range from the position J0 to the position J1 of the above-mentioned cam groove 50c is set to a horizontal state that does not move correspondingly to the initial movement of the loading slider 50, that is, the movement shown in FIGS. The follower pin 11 does not rise, but absorbs the stroke of the initial operation. From the position J1 to the position J4 at the top of the cam groove is used to raise the lifting frame 10 and clamp the disc D with the chuck 8, and from the position J4 to the position J5 is the high position where the disc D can be driven.

On the other hand, the slide member 62 advances and retreats synchronously within the range from the position J1 to the position J5 of the cam groove 50c on which the slider 50 is mounted, so that the position K1 of the lower part immediately becomes an inclined part and reaches the top of the cam groove. The location K4. From the position K4 to the position K5, the same shape as that from the position J4 to the position J5 of the cam groove 50c described above is formed.

The relationship between the height H11 from the lower part of the position J0 to J1 of the above-mentioned cam groove 50c to the top J4 and the height H12 from the position K1 of the cam groove 62a to the top K4 is H11<H12. As shown in the figure, the positions J0 to J1 are generated. Relative height difference h1 higher than position K1. In addition, since the width of the inclined portion between the positions J1 to J4 of the cam groove 50c is the same as the width of the inclined portion between the positions K1 to K4 of the above-mentioned cam groove 62a, the inclined portion of the cam groove 50c with a small step difference is the same as that of the cam groove 62a. The cam groove 62a has a gentle inclination compared with an inclined portion having a large step difference. Therefore, in the case where the sliding block 50 and the sliding member 62 have the same movement amount, compared with the driven pin 11, the driven pin 12 rises or falls relatively larger, and the ranges of positions J4 to J5 and positions K4 to K5 , the follower pin 11·12 becomes the same height position.

Next, below, referring to FIG. 29 and FIG. 30 , the operation mode of the elevating frame 10 on the axis line R-R shown in FIG. 9 will be described. Fig. 29 shows the rising stroke of the elevating frame 10. Fig. 29 (A) is the state in which the elevating frame 10 is in the lowest state. In this figure, it is the state after the disc D is inserted from the notch 3a of the front cover 3, that is, in Fig. 20 status shown. At this time, the follower pin 11 is at the position J0 of the cam groove 50c, and the follower pin 12 is at the position K1 of the cam groove 62a. Therefore, there is a height difference h1 between the driven pin 11 and the driven pin 12, so the elevating frame 10 is in an inclined state as shown in the figure.

From the state of Fig. 29 (A) when the optical disk D is continuously fed in, it is in the state of absorbing the initial action stroke of the loading slider 50, that is, as shown in Fig. The position J0 of the cam groove 50c is switched to the position J1. In addition, the loading slider 50 is further moved in the X1 direction. As shown in FIG. 24, the follower pin 11 is at the position J2 of the cam groove 50c, and when the follower pin 12 reaches the position K2 of the cam groove 62a, as shown in FIG. 29(B), The elevating stand 10 rises slightly from the initial position. At this time, since the follower pin 12 has a larger ascent range than the follower pin 11, the elevating bracket gradually becomes a horizontal state.

When the loading slider 50 further moves in the X1 direction and the sliding member 62 moves in the Y1 direction, the follower pin 11 of the cam groove 50c goes to the position J3, and at the same time, the follower pin 12 of the cam groove 62a goes to the position K3. During this stroke, the chuck claw 8a of the chuck 8 abuts against the central hole Da of the optical disk D, and in this state, the optical disk D is pushed upward, as shown in FIG. 29(C), the central hole Da of the optical disk D The peripheral edge of Da is in contact with the convex portion 2b of the opening 2a of the lid 2A.

Fig. 29(D) is the state where the follower pin 11 of the cam groove 50c goes to the position J4, and the follower pin 12 of the cam groove 62a goes to the position K4 at the same time, the chuck 8 enters the center hole Da of the optical disk D and clamps it, and becomes the same as Keep the same state as shown in Figure 25 on the turntable 7. When the above state is reached, the driven pins 11·12 are at the same height, and the elevating bracket 10 is in a horizontal state.

Fig. 29 (E) is the state where the driven pin 11 of the cam groove 50c goes to the position J5, and at the same time, the driven pin 12 of the cam groove 62a goes to the position K5, and the elevating bracket 10 is slightly lowered, and the optical disk D can be driven, which is similar to Fig. 26 consistent state.

Next, referring to FIG. 30 , the stroke of descending the elevating frame 10 in order to start sending out the optical disc D from the state where the optical disc D can be driven will be described. Fig. 30 (A) is the same state as Fig. 29 (E) that the optical disc D can be driven. In this state, when accepting the unloading instruction of the optical disc D, the reverse movement of the conveying mechanism is started, and the loading slider 50 moves to the X2 direction. When the movement starts, the slide member 62 starts to move in the Y2 direction.

Fig. 30 (B) shows that the driven pin 11 of the cam groove 50c goes from the position J5 to the position J4, and at the same time, the driven pin 12 of the cam groove 62a goes from the position K5 to the position K4, and the lifting bracket 10 rises once.

Fig. 30 (C) shows that the driven pin 11 of the cam groove 50c moves to the position J2 from the position J4 through the position J3, and at the same time, the driven pin 12 of the cam groove 62a switches from the position K4 to the stroke of the position K2 through the position K3. During the descending stroke of the elevating frame 10, the optical disk D clamped by the chuck 8 is in the state of being pushed up by the release pin 64, so the clamping of the optical disk D can be released.

Fig. 30 (D) is the state that the driven pin 11 of the cam groove 50c goes to the position J2, and at the same time, the driven pin 12 of the cam groove 62a goes to the position K2, showing that the driven pin 12 is relatively larger than the driven pin 11 The decline, thus the state that the lifting support 10 gradually begins to tilt thereupon.

Fig. 30 (E) is the state where the driven pin 11 of the cam groove 50c goes to the position J1, and at the same time, the driven pin 12 of the cam groove 62a goes to the position K1, which shows the relative height difference h1 of the driven pin 11·12. At the state of the maximum inclination, the descent of the elevating frame 10 is completed, a gap h2 is formed between the chuck 8 and the optical disk D, and the optical disk D is in a state that can be sent out. In addition, in the above-mentioned tilted state, the portion closest to the rear surface of the elevating frame 10 of the box bottom 2B becomes the end U of the sub-guide shaft 16 (see FIGS. 4 and 5 ).

However, the screw diameter of the adjustment screw for fixing the main guide shaft 15 and the sub guide shaft 16 in the disc device having the above-mentioned structure is about 1.4 mm, and the screw holes corresponding to the screw diameter can be formed by tapping. It is necessary to set the diameters of the main guide shaft 15 and the sub guide shaft 16 to 2.0 mm or more. Due to this limitation, the auxiliary guide shaft 16 usually adopts a shaft with a diameter of 2.0 mm.

FIG. 31 shows the state where the main guide shaft 15 and the sub-guide shaft 16 are arranged on the elevating bracket 19. The main guide shaft 15 is in a free fitting state by passing through the through hole 10e formed on the elevating bracket 10 through the coil spring 71. The adjusting screw 70 inserted downward is threaded into the screw hole 15a to be fixed. On the other hand, similarly, the sub guide shaft 16 is also fixed by screwing the adjusting screw 70 inserted from the through hole 10e via the coil spring 71 into the screw hole 16a.

Owing to adopting such a structure, by turning the adjustment screw 70, the main guide shaft 15 and the sub-guide shaft 16 can be moved up and down to adjust the inclination angle, whereby the bracket block 14 is moved up and down to adjust the focus of the optical pickup 13. . In addition, when the adjustment screw 70 is rotated to complete the focus adjustment of the optical pickup 13, an anti-slack agent is injected into the threaded part of the tip of the adjustment screw 70 to fix the adjustment state.

The end U of the auxiliary guide shaft 16 arranged on the elevating frame 10 becomes the state shown in FIG. When the distance between the lower surface and the surface of the case bottom 2B, that is, the stroke width is hs1, the overall thickness of the device becomes W1. Fig. 33 shows the situation that the elevating support 10 is in the lowermost state and includes the state of the bracket block 14, and the inner end thereof is substantially at the same position below the end U of the secondary guide shaft 16, and may not be connected with the box. Bottom 2B contacts.

However, in the case of such a configuration, the overall thickness W1 of the device is set within a range in which the bottom surface of the end portion of the bracket block 14 and the end portion U of the sub-guide shaft 16 does not come into contact with the case bottom 2B. However, in order to further adapt the whole device to thinning requirements, as shown in Figure 34, an opening 2B-1 · 2B-2 is formed on the bottom 2B of the box to avoid contact and obtain the overall thickness W2 of the device, because W1>W2 , so thinning can be achieved. However, such a configuration may reduce the rigidity of the case bottom 2B as described above, and at the same time, it may cause problems such as leakage of noise such as search sounds to the outside of the device and intrusion of dust and the like into the inside of the device.

In view of this, in the present invention, as shown in FIG. 35 , a supporting convex portion 2C is formed at the position of the box bottom 2B facing the descending position of the end U of the auxiliary guide shaft 16. The above-mentioned support convex portion 2C restricts the descent of the end portion U of the above-mentioned sub-guide shaft 16 . Thereby, when the elevating stand 10 is lowered, as shown in FIG. 36 , the end U of the sub-guide shaft 16 comes into contact with the support convex portion 2C, and excessive lowering thereof is restricted. At this time, the adjusting screw 70 in the free fitting state on the elevating frame 10 is slidably movable in the through hole 10e as shown in the figure, and the hindrance to the descending of the elevating frame 10 is eliminated. In addition, when the elevating frame rises and the end U of the sub-guide shaft 16 leaves the supporting convex portion 2C, the sub-guide shaft 16 returns to the state shown in FIG. 35 by virtue of the spring elasticity of the coil spring 71 .

In this way, since the protrusion of the lower surface of the end portion U of the auxiliary guide shaft 16 can be forcibly restricted, as shown in FIG. Device thickness. Furthermore, since no opening is formed, high rigidity can be maintained, and problems such as search sounds and other noises leaking to the outside of the device and dust entering the inside of the device are eliminated. In addition, by increasing the protruding degree of the support convex portion 2C, the lowering of the end portion U of the sub-guide shaft 16 can be greatly restricted, and thus, the thickness of the device can be made thinner.

In addition, since the lowering of the end U of the sub-guide shaft 16 can be restricted by the support protrusion 2C, the final lowering position of the end U of the sub-guide shaft 16 is usually constant. Therefore, in the focus adjustment of the optical pickup 13, for example, as shown in FIG. When 10 is lowered, the adjustment screw 70 slides and moves in the through hole 10e in the same state as in FIG. 36 . Therefore, the end portion U of the sub-guide shaft 16 does not come into contact with the case bottom 2B, and the gap in the focus adjustment of the optical pickup 13 can be increased.

FIG. 38 shows an example of another structure of the present invention. As shown in FIG. 39(A), at the end U of the auxiliary guide shaft 16, a supporting convex portion 16b facing the bottom 2B is integrally formed. In addition, the supporting convex portion 16b can also be formed on the mounting member 16A fixed to the end of the auxiliary guide shaft 16 as shown in FIG. The sub-guide shaft 16 is formed on a terminal part 16B at the end.

Due to the adoption of such a structure, as shown in FIG. 40, when the elevating frame 10 is lowered from the raised state to the lowering shown in FIG. The drop of the end U. Furthermore, when the elevating frame 10 is further lowered, as shown in FIG. 41 , the adjusting screw 70 is slidably moved in the through hole 10e, and the hindrance of the elevating frame 10 being lowered is avoided. Therefore, all the same actions and effects as those of the above-mentioned configuration in which the supporting convex portion 2C is formed on the case bottom 2B can be obtained.

Claims (3)

1. A disk device, a disk drive mechanism and an optical pick-up unit are arranged on the lifting bracket, the above-mentioned disk drive mechanism is composed of a turntable with a chuck and a spindle motor, and the above-mentioned optical pickup unit can be positioned in the diameter direction of the disk relative to the chuck Forward and backward, the above-mentioned elevating bracket is moved up and down, and the clamping or clamping release of the central hole of the disk involved in the above-mentioned chuck can be carried out. It is characterized in that, When the sub-guide shaft supporting the bracket block of the above-mentioned optical pickup unit is lowered together with the lifting bracket, the lowering of the end of the sub-guide shaft is restricted, The above-mentioned secondary guide shaft is fixed by the screw inserted in the free fitting state from the through hole formed on the lifting bracket through the spring, and the screw in the free fitting state on the lifting bracket slides in the above-mentioned through hole to eliminate the interference. Interference with the descent of the lifting bracket, A supporting protrusion facing the end of the sub-guiding shaft is formed on the bottom of the box. When the elevating bracket is lowered, the end of the sub-guiding shaft contacts the supporting protrusion to limit the decline of the end of the sub-guiding shaft. . 2. A disk device, a disk drive mechanism and an optical pick-up unit are arranged on the lifting bracket, the above-mentioned disk drive mechanism is composed of a turntable with a chuck and a spindle motor, and the above-mentioned optical pickup unit can be positioned in the diameter direction of the disk relative to the above-mentioned chuck. Forward and backward, the above-mentioned elevating bracket is moved up and down, and the clamping or clamping release of the central hole of the disk involved in the above-mentioned chuck can be carried out. It is characterized in that, When the sub-guide shaft supporting the bracket block of the above-mentioned optical pickup unit is lowered together with the lifting bracket, the lowering of the end of the sub-guide shaft is restricted, The above-mentioned secondary guide shaft is fixed by the screw inserted in the free fitting state from the through hole formed on the lifting bracket through the spring, and the screw in the free fitting state on the lifting bracket slides in the above-mentioned through hole to eliminate the interference. Interference with the descent of the lifting bracket, The end of the auxiliary guide shaft is formed with a supporting protrusion facing the bottom of the box, and when the lifting bracket is lowered, the lowering of the end of the auxiliary guiding shaft is restricted by the supporting protrusion. 3. The disk device according to claim 1 or 2, wherein: With the base end portion of the elevating frame as the rotation axis, the front end portion is swung in the up and down direction to carry out the clamping operation of the optical disc.

Images