JP3033535B2 - Disc player - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a disc player.

[0002]

2. Description of the Related Art At present, a disk loading and chucking mechanism in a disk player, which is widely used, draws a tray on which a disk is placed horizontally to a playable position of the disk, and thereafter supports a disk table. The movable chassis is raised to chuck the disk.

A conventional chucking mechanism of a disc player is configured to support a movable chassis on which a disc table is supported so as to be tiltable and rotatable with respect to a fixed chassis, and to move the disc table up and down (for example, "actual"). No. 63-52163 ").

[0004]

In the chucking mechanism of the conventional disk player as described above, the movable chassis is supported so as to move up and down by tilting and rotating, so that its fulcrum is much longer than the chucking portion. It has to be set at a distant position, so that the entire mechanism becomes large, and there is a disadvantage that it is difficult to secure a space for accommodating other mechanical components and a circuit board. The present invention has been made for the purpose of solving such a drawback.

[0005]

In order to achieve the above object, a disk player according to the present invention has a disk mounted thereon and a position where the disk can be mounted and a position where the disk can be reproduced relative to a first chassis (fixed chassis). A second chassis (movable chassis) that supports a tray movably supported between the tray, a disk rotation drive unit and an optical pickup support unit, and that is provided to be movable up and down with respect to the first chassis.
And a cam portion that engages with the second chassis.
An elevation mechanism for moving the second chassis up and down by moving in a direction orthogonal to the elevation direction of the chassis, and driving means for moving the tray and operating the elevation mechanism. It is configured to linearly move up and down in a direction substantially perpendicular to the disk surface.

As a result, the mechanism can be made compact and a space can be provided, so that the degree of freedom in designing other parts can be increased.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In the figure, reference numeral 1 denotes a drive mechanism of the disc player as a whole, 2 denotes a fixed chassis as a first chassis on which the mechanical components are configured and supported, and the fixed chassis 2 is connected to an outer casing 3 via its leg 2a. It is fixed to.

On the upper surface side of the fixed chassis 2,
A tray 4 for mounting a disk is supported movably in the front-rear direction between a position where the disk can be mounted and a position where the disk can be reproduced. In FIG. 1, the left side is the front and the right side is the rear. On the upper surface of the tray 4, there is formed a concave portion 4a on which the disk D is placed and held.
(Optical video disc), LD single (small diameter optical video disc), CD (compact disc), C
A plurality of steps having different diameters are formed so that various kinds of discs such as a D single (small diameter compact disc) can be mounted.

A bridge-like support plate 5 is provided on the upper surface of the fixed chassis 2 so as to straddle the tray 4 between both left and right ends thereof. A chucking member 6 that is magnetically attracted corresponding to the table is rotatably mounted.

On the other hand, on the lower surface side of the fixed chassis 2, a movable chassis 7 as a second chassis is provided so as to be able to linearly move up and down in a direction substantially perpendicular to the recording surface of the disk D. The movable chassis 7 is disposed so as to straddle a notch-shaped concave portion 8 from the rear end edge to the center of the fixed chassis 2, and a vertical guide protruding from the fixed chassis 2. The movable chassis 7 is supported so as to move up and down linearly along the axis 9.
Is fixedly supported, and a disk table 11 is attached to the tip of the rotary drive shaft of the spindle motor 10.

An elevating mechanism 12 for moving the movable chassis 7 up and down is provided on the lower surface side of the fixed chassis 2. The elevating mechanism 12 includes a fixed chassis 2
Sliding body 1 slidably supported in the front-rear direction, that is, in the direction perpendicular to the vertical direction of the movable chassis, along the lower surface side of
3 The sliding body 13 has a housing shape as a whole, and operating long holes 14 and 15 as cam portions are formed at two front and rear portions on both left and right side surfaces thereof. As is apparent from FIG. 3, the operating slots 14 and 15 have a shape that is highly inclined from the front to the rear, and both ends are formed horizontally. Support pins 16, 1 protruding from the left and right sides of the movable chassis 7
7 are respectively inserted and engaged.

A projecting plate 13a is formed at the front end of the sliding body 13 along the lower surface of the fixed chassis 2, and an operating pin 18 erected on the projecting plate 13a has a long hole 19a.
And protrudes to the upper surface side of the fixed chassis 2 and is engaged with a cam groove of a rotation operating body described later.

Further, on the movable chassis 7 which is raised and lowered by the raising and lowering mechanism 12, a pickup support frame 20 which is a support means of an optical pickup 25 for reading a signal recorded on the disk D is supported. The pickup support frame 20 is supported by bearings 22 provided on the movable chassis 7 by support shafts 21 projecting from the left and right sides thereof, and swings with respect to the recording surface of the disk D. Have been.

A guide rail 23 is fixed to the pickup supporting frame 20 in a radial direction of the disk D, and a slider 24 is slidably supported along the guide rail 23. An optical pickup 25 facing the recording surface of the disk D is mounted and fixed on the reference numeral 24. The slider 24 to which the optical pickup 25 is fixed is driven by a predetermined drive mechanism, but is not shown in the present embodiment.

Further, on the slider 24, a detection element 26 for detecting the bending state of the disk D is provided near the optical pickup 25.

An engagement rod 27 is projected from the front end face of the pickup support frame 20, and the engagement rod 27 is engaged with a cam member described later to perform a tilt adjustment operation of the optical pickup. It is made to be.
The pickup support frame 20 is rotated and biased by a predetermined biasing means so that its front end, that is, the end on the side where the engaging rod 27 protrudes, is raised in a normal state.

Next, a description will be given of the structure of the driving means 30 for performing the operations of moving the tray 4, moving the movable chassis 7 up and down, and swinging the pickup support frame 20 in the above structure. The components of the driving means 30 are all disposed on the upper surface side of the fixed chassis 2 except for the motor.

A motor 31 as a drive source is fixed to a predetermined position of the fixed chassis 2 on its lower surface, and a drive shaft of the motor 31 projects to the upper surface of the fixed chassis 2 and has a pulley 32 at its tip. Is installed.

The rotation of the pulley 32 driven by the motor 31 is transmitted to a reduction gear group 34 as a transmission mechanism via a belt 33, and the rotation of the reduction gear group 34 causes the rotation of the pulley 32 to move to the front end of the fixed chassis 2. The rotation operating body 35 which is pivotally supported is configured to be rotationally driven.
That is, an operating gear portion 36 is formed on the entire upper surface of the rotary operating body 35, and the final gear of the reduction gear group 34 is meshed with the operating gear portion 36.

A tray driving gear portion 37 as a first driving force transmitting portion is formed over a predetermined range on the outer peripheral portion of the rotary operating body 35, that is, in this embodiment, the tray driving gear portion 37 is provided. Reference numeral 37 denotes a substantially half-circumferential portion of the rotary operating body 35, and the remaining half-circumferential portion forms a missing tooth portion 38.

Further, on the lower surface of the rotary operating body 35,
A cam groove 39 as a second driving force transmitting portion is formed, and the operation pin 18 of the elevating mechanism 12 is engaged with the cam groove 39. The cam groove 39 includes a loading area 39a, a chucking area 39b, and a tilt area 39c used for loading, chucking, and tilt adjustment of the optical pickup, respectively. It is formed in an arc shape centered on the rotation center axis 35a of the rotary operating body along the outer peripheral portion, and the chucking area 39b approaches the rotation center axis 35a of the rotary operating body 35 from the end of the loading area 39a. The tilt area 39c is formed in the vicinity of the rotation center axis 35a of the rotation operating body 35 in an arc shape centered on the rotation center axis 35a.

The fixed chassis 2 has a rotating body 3
An idler gear 40 is pivotally supported so as to correspond to the tray driving gear portion 37 of No. 5. This idler gear 40 is
A large-diameter gear portion 40a is provided above the small-diameter gear portion 40b.
The tray drive gear 37 of the rotary drive 35 is engaged with the small-diameter gear 40b during loading of the disk, and the large-diameter gear 40a is It is always meshed with a rack gear portion 41 formed on the lower surface side in the same direction as the moving direction, that is, in the front-rear direction.

Further, a cam member (hereinafter simply referred to as a cam) for tilt operation as a swinging means for swinging the pickup support frame 20 to a position corresponding to the engaging rod 27 of the pickup support frame 20 described above is provided on the fixed chassis 2. 42)
Is pivoted. A cam groove 43 is formed on the peripheral surface of the cam member 42. That is, the cam groove 43 has a shape whose height continuously changes as shown in FIG. An opening 43a is formed which opens largely toward the optical pickup. As will be described later, the engaging rod 27 of the pickup supporting frame 20 is engaged with the cam groove 43 to perform a tilt adjustment operation of the optical pickup. .

The gear portion 4 is provided above the cam member 42.
4 are integrally formed, and the gear portion 44 is
That is, the cam member 42 is configured to be rotationally driven via the rotary operating body 35 by the driving of the motor 31.

Next, the operation of the disk player of this embodiment configured as described above will be described. Now, as shown in FIG. 7, when the tray 4 is fully pulled out to the frontmost movement position, that is, the position where the disc can be loaded, the tray driving gear portion 37 of the rotary operating body 35 and the small diameter gear portion 40b of the idler gear 40 are connected. In other words, the rotation operating body 35 and the tray 4 are in mesh with each other via the idler gear 40 and are motively connected.

In this state, the rotary operating body 35
The operating pin 18 of the elevating mechanism 12 is engaged with the starting end of the loading area 39a of the cam groove 39, so that the sliding body 13 is at the retracted position. Accordingly, as shown in FIG. 3A, the support pins 16 and 17 of the movable chassis 7 are engaged with the lower front end portions of the operation slots 14 and 15 of the sliding body 13, so that the movable chassis 7 is located at the lowered position. ing.

When the movable chassis 7 is lowered, as shown in FIG. 4A, the engaging rod 27 of the pickup support frame 20 supported on the movable chassis 7 is separated from the cam member 42 below the cam member 42. Position, ie cam member 4
2 and the engaging rod 27 are in a non-engaged state, so that the rotary operating body 35 and the pickup supporting frame 20 are separated dynamically.

When the motor 31 is rotated in one direction, for example, in the forward direction from the above state, the rotary operating body 35 rotates clockwise in the drawing, and this rotation is performed by the idler gear 40.
, The tray 4 is moved so as to be pulled backward, and the disc D is transported to a playable position (loading).

When the tray 4 is completely pulled in and the loading is completed, the tray driving gear portion 37 of the rotary operating member 35 is disengaged from the small diameter gear portion 40b of the idler gear 40 as shown in FIG. Therefore, the rotary operating body 35 and the tray 4 are in a state of being separated dynamically. The tray 4 is immovably locked by a predetermined locking means in the retracted state.

In the above-described loading operation, the operating pin 18 of the lifting mechanism 12 relatively moves in the loading area 39a of the cam groove 39 with the rotation of the rotary operating body 35. Since the loading area 39a is formed in an arc shape centered on the rotation center axis 35a of the rotary operating body 35 as described above, the forward / backward movement position of the operating pin 18 does not change. Since it is not operated, the movable chassis 7 is held at the lowered position.

After the above-described loading operation is completed, the motor 31 is continuously driven, and the rotary operating body 35 is rotated clockwise. When the engagement position of the operation pin 18 with respect to the cam groove 39 moves from the loading area 39a to the chucking area 39b, the operation pin 18 is guided by the groove shape of the chucking area 39b and is pressed and moved forward (FIG. 9). reference).

As a result, the sliding body 13 moves forward, whereby the engaging positions of the support pins 16 and 17 of the movable chassis 7 with respect to the operating slots 14 and 15 are moved from the lower part to the higher part as shown in FIG. 3B. That is, the movable chassis 7 is supported by the guide shaft 9 so as to be movable only in the vertical direction, and the movement in the front-rear direction is restricted. Press the support pins 16 and 17 upward.
Thereby, the movable chassis 7 is raised vertically. When the movable chassis 7 rises in this way, the disk table 11 lifts the disk D on the tray 4 and sandwiches it between the chucking member 6 to make the disk playable (chucking).

As shown in FIG. 4B, when the movable chassis 7 is lifted, the engaging rod 2 of the pickup supporting frame 20 supported on the movable chassis 7 is moved upward.
7 is engaged with the cam groove 43 of the cam member 42 from below through the opening 43a. In this operation, the cam member 4 is moved so that the engaging rod 27 corresponds to the opening 43a of the cam groove 43 when the movable chassis 7 is lifted.
2 and the movement of the movable chassis 7 are synchronized.

When the movable chassis 7 is completely lifted and the disk chucking is completed, the engaging rod 27 of the pickup supporting frame 20 is completely inserted into the cam groove 43 of the cam member 42 as shown in FIG. Engaged. When the detection unit 26 detects the deflection of the disk D during the reproduction of the disk, the motor 31 is rotated in the forward or reverse direction based on the detection signal.
5, the cam member 42 is driven to rotate.
Guided by the cam groove 43, the pickup support frame 20
Is pivoted about the support shaft 21. Therefore, the optical axis of the optical pickup 25 on the pickup support frame 20 is tilted in accordance with the bending of the disk, that is, the tilt adjustment operation of the optical pickup is performed.

The rotation of the rotating body 35 in the tilt adjusting operation of the optical pickup is performed within a range where the operating pin 18 of the lifting mechanism 12 is engaged with the tilt area 39c of the cam groove 39 as shown in FIG. Since the tilt area 39c is formed in an arc shape about the rotation center axis 35a of the rotary operating body 35 as described above, the forward and backward movement position of the operating pin 18 does not change, so that the lifting mechanism 12 operates. Therefore, the movable chassis 7 is held at the raised position, that is, the chucking state of the disk is maintained.

In the disk player of this embodiment constructed and operated as described above, the tray 4 is driven by one motor 31.
(Moving of the disc), raising (chucking) of the movable chassis 7 and swinging of the pickup support frame 20 (tilt adjustment of the optical pickup). The configuration is simpler than that of a disc player that uses a separate dedicated motor for tilt adjustment of the optical pickup, so that the cost can be kept low and an inexpensive disc player can be provided.

In the disc player of this embodiment, the movable chassis 7 provided with the spindle motor 10 is linearly moved up and down in a substantially vertical direction in the chucking mechanism. The mechanism is more compact than in the prior art, which is supported so that it can be moved up and down by rotating, so that an empty space in the outer casing 3 can be widened as apparent from the drawing. Therefore, a portion for accommodating the circuit board and the like is sufficiently secured, and the degree of freedom in designing the circuit board and the outer casing can be increased. Further, in this disc player, a pickup support frame 20 serving as support means for the optical pickup 25 is provided.
Also, since the optical pickup 25 is moved up and down together with the movable chassis 7 together with the spindle motor 10, there is no need to separately provide an elevating mechanism for the optical pickup 25. This is also advantageous for cost reduction.

Although an example of the embodiment of the present invention has been described above, the present invention is not limited to the configuration shown in this example, and it is needless to say that various changes and changes can be made.

[0039]

As is apparent from the above description, the disc player of the present invention has a chucking mechanism in which the second chassis provided with the disc rotation driving means and the optical pickup support means is arranged substantially vertically. The linear up-and-down configuration allows more space for the mechanism, which allows flexibility in the circuit board and outer housing design, and is also advantageous in reducing the weight and cost of equipment. It has an effect.

[Brief description of the drawings]

FIG. 1 is a partially cutaway plan view of a disc player to which the present invention is applied.

FIG. 2 is a plan view showing a state where a tray is removed.

FIG. 3 is a side view partially omitted.

FIG. 4 is a side view of the tilt adjustment mechanism.

FIG. 5 is an enlarged plan view of a main part (driving means).

FIG. 6 is a developed view of the tilt operation cam member.

FIG. 7 is an explanatory diagram of the operation.

FIG. 8 is an explanatory diagram of the operation.

FIG. 9 is an explanatory diagram of the same operation.

[Explanation of symbols]

D: disk, 2: fixed chassis (first chassis),
4: tray, 7: movable chassis (second chassis), 9
... vertical guide shaft, 10 ... spindle motor (disk rotation drive means), 12 ... elevating mechanism, 30 ... drive means

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G11B 17/035 G11B 17/04

Claims (1)

(57) [Claims] 1. A tray on which a disk is mounted and movably supported on a first chassis between a position on which the disk can be mounted and a position on which the disk can be reproduced, a rotation driving means for the disk and a support means for an optical pickup. And a second chassis provided so as to be able to move up and down with respect to the first chassis; and a cam portion engaged with the second chassis.
An elevating mechanism for elevating the second chassis by moving the chassis in a direction perpendicular to the elevating direction of the chassis, and a driving means for moving the tray and operating the elevating mechanism; A disk player configured to linearly move the chassis vertically in a direction substantially perpendicular to the disk surface.