JP2554034Y2 - Disc player - Google Patents

Description

[Detailed description of the invention]

[0001]

The present invention relates to a compact disc,
Recording of signals on a disc-shaped recording medium such as a laser disk,
Or, it relates to a disc player capable of reproducing.

[0002]

2. Description of the Related Art Conventionally, the present applicant has proposed a disc player as disclosed in Japanese Patent Application No. 2-87141 in order to reduce the size and weight of the disc player.

[0003] That is, a motor elevating mechanism for disc clamping is composed of a motor base on which a spindle motor supported to be movable up and down with respect to a fixed chassis is mounted, and both sides of the motor base. And two slide drive plates guided reciprocally in a horizontal direction along a chassis, and a plurality of pins projecting from both sides of the motor base in a slide direction to the slide drive plate. A driving mechanism that is reciprocated in the moving direction of the slide driving plate by the power from a loading motor by a cam mechanism configured to be engaged with a plurality of cam grooves formed in the driving member; The drive member moves in the horizontal direction by a spring interposed between the slide drive plates, so that the motor base on which the spindle motor is mounted moves up and down to perform disk clamp. Technology has been known.

In such a disc player,
A plurality of pins protruding from both sides of the motor base are engaged with a plurality of cam grooves formed in the slide driving plate in a sliding direction, so that the spindle motor always slides. It is in a state of being supported by the driving plate.

[0005]

[Problem to be solved by the invention] In the conventional technology,
The motor base to which the spindle motor is attached is always supported by the slide drive plate. During transportation, the spindle motor is supported by the horizontal portions of the plurality of cam grooves formed in the slide drive plate in the slide direction. Therefore, there is a possibility that the engagement portion between the motor base and the slide drive plate may be damaged by an impact such as dropping during transportation.

Further, as a measure against damage to the engaging portion between the slide drive plate and the motor bay due to an impact such as dropping during transportation, the size and weight of the spindle motor must be limited.

[0007]

A plurality of pins (54) protruding from both sides of a motor base (52) on which a spindle motor (51) is mounted and a sliding direction of the sliding drive plates (55) (55) are provided. The plurality of pins (54) and the plurality of cam grooves (56) (57) so that the plurality of cam grooves (56) (57) (58) formed in A damage prevention member (150) for supporting the spindle motor (51) is attached to the fixed chassis (13) instead of engaging and supporting with the (58).

[0008]

A plurality of pins (54) projecting from both sides of a motor base (52) on which a spindle motor (51) is mounted, and a plurality of cams formed on the slide drive plates (55) and (55) in a sliding direction. In order to attach the damage prevention member (150) to the fixed chassis (13) so that the grooves (56), (57), and (58) do not come into contact at the lowered position of the spindle motor (51), during transportation, the spindle motor (51) Are supported by the damage prevention member (150).

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG.
The guide shafts (18) are protruded downward, and the guide shaft (18) guides the elevation of the motor base (52). A spindle motor (51) is attached to the motor base (52), and a turntable (50) is fixed to the motor output shaft. A plurality of positioning seats (53) are provided on the upper surface of the motor base to define the rising end of the motor base (52) against the rear surface of the chassis (13). Three pins (54) are protruded from the surface.

A pair of slide driving plates (55) and (55) are disposed on both sides of the motor base (52), and each slide driving plate is provided with a plurality of projections protruding from the rear surface of the chassis (13). The guide member (19) supports the tray so as to be able to reciprocate in the tray retracting direction. (See FIGS. 8 to 9). First to third cam grooves (56), (57), (58) extending obliquely are formed in the inner surfaces of the slide drive plates (55), (55), respectively. As shown in FIG. 11, the first cam groove (56) and the third cam groove (58) have the same shape, and the inclined cam portions (56a) (58a) and the horizontal cam portions (56b) (58b).
With On the other hand, the second cam groove (57) includes a first inclined cam portion (57a) and a second inclined cam portion (57b) having a smaller inclination angle than the cam portion. A long hole (55a) and a locking portion (55b) are formed at the rear end of the slide drive plate (55).

As shown in FIG. 1, pins 54 projecting from both ends of the motor base 52 are respectively engaged with the cam grooves 56, 57, 58 of the slide driving plates 55, 55. In combination, a pair of left and right cam mechanisms for raising and lowering the motor base (52) by reciprocating movement of the slide drive plate (55) is formed. The relay drive plate (64) and the spring (59) are interposed between the slide drive plates (55) and (55). The relay drive plate (64) has the protruding pieces (67) and (67) formed on both sides of the slide drive plate (55) fitted in the long holes (55a) with a margin.

The spring (59) is locked by a support piece (66) projecting downward from the front edge of the relay drive plate (64), and both ends of the spring are engaged with the slide drive plates (55) and (55). It is engaged with the stop (55b).

Below the spindle motor (51), a plurality of pins (54) projecting from both sides of a motor base (52) on which the spindle motor (51) is mounted and the slide drive plate (55)
(55) A plurality of cam grooves (56) (57) (5
When the spindle motor (51) is lowered, the plurality of pins (54) and the plurality of cam grooves (56) (57) (58) so that the spindle motor (51) does not come into contact at the lowered position. Damage prevention member that supports the spindle motor (51) in place of the engagement support with
(150) is attached to the fixed chassis (13).

On the upper surface of the relay drive plate (64), there is provided a long hole (65) with which a pin (62) of a drive lever (6) described later is engaged.

Therefore, when the relay drive plate (64) is moved rearward by the drive lever (6), the slide drive plates (55) and (55) are pulled rearward via the spring (59), and the cam mechanism is driven. By the operation, the motor base (52) is driven upward from the lowered position of the spindle motor (51) in the transport state, and the support of the spindle motor (51) is set at a plurality of positions at the lowered position of the spindle motor (51). Pin (54) and multiple cam grooves
(56) A plurality of pins (54) and a plurality of cam grooves (56) from the damage prevention member (150) attached so that the
(57) The slide drive plate (55) (5)
Go to 5).

FIGS. 8 to 10 show a spindle motor (51).
Shows how it rises. As shown in FIG. 8, the tray (4
When 4) is in the loading state, both slide drive plates (55)
Is at the most advanced position, and the spindle motor (51) and the turntable (50) are set at a lower standby position which does not interfere with the tray (44).

At this time, the spindle motor (51) has a plurality of pins (54) projecting from both sides of the motor base (52) and a plurality of slide driving plates (55) (55) formed in the sliding direction. The damage prevention member (15) is mounted so that the cam grooves (56), (57), (58) do not
0).

After the tray (44) reaches the loading completion position as shown in FIG. 9, when the slide drive plate (55) is moved rearward (rearward in the figure) by the pulling of the spring (59), the motor base (52) is moved. The pin (54) is provided with the inclined cam portions (56a) (57) of the first, second and third cam grooves (56) (57) (58) of the slide drive plate (55).
a) Driven by (58a), the spindle motor (51) and the turntable (50) are raised together with the motor base.

At this time, the spindle motor (51) includes a plurality of pins (54) protruding from both sides of the motor base (52) and a plurality of slide driving plates (55) (55) formed in the sliding direction. The damage prevention member (15) is mounted so that the cam grooves (56), (57), (58) do not
The support by 0) changes to the support by the slide drive plates (55) and (55). During this process, the turntable (50) is
4) Lift the upper disk (120) from the tray mounting surface and bring the disk into contact with the clamper (70) of the pickup device (9).

Further, when the slide drive plate (55) is pulled to the left, as shown in FIG. 10, the two pins (54) and (54) at the front and rear of the motor base (52) are moved to the slide drive plate (55). ) First and third cam grooves
(56) While riding on the horizontal cam portions (56b) and (58b) of (58), the center pin (54) of the motor base (52) is connected to the second cam groove (57) of the slide drive plate (55). To the second inclined cam portion (57b). In this state, when the slide drive plate (55) is further slightly pulled leftward, the positioning seat (53) on the motor base (52) is driven by the second cam portion (57b) to move the chassis (13). ), The turntable (50) is accurately positioned and held at the rising end.

In the state shown in FIG. 1, the spring (59) is elastically deformed, and the projecting pieces (67, 67) of the relay driving plate (64) are connected to the elongated holes (55a), (55) of the slide driving plate (55). It shifts backward within the margin of 55a). Therefore, the positioning seat (53) of the slide drive plate (55) is moved by the repulsive force of the spring (59).
Is pressed and held.

Next, a mechanism for rotating the drive lever (6) will be described. As shown in FIGS. 3 to 7, an L-shaped drive lever (6) is rotatably mounted on a support shaft (60) on a chassis (13), and is provided at one end of the lever. The cam follower (61) is engaged with the spiral cam groove formed on the back surface of the third gear (3), and the pin (62) provided at the other end of the lever is connected to the relay drive plate (64) as described above. Into the long hole (65).

As shown in FIGS. 12 and 13, the cam groove (33) of the third gear (3) has a first cam portion (33a) having a constant radius,
2nd and 3rd cam part (33b) (33c) whose radius gradually decreases
And the radius of the cam groove outer peripheral wall increases, and the groove width becomes X from W in the figure.
And a fifth cam portion (35e) having a constant radius. The first cam portion (33a) engages with the cam follower (61) of the drive lever (6) during tray driving, and the second and third cam portions serve to drive the motor elevating mechanism (5). Therefore, it engages with the cam follower (61).

In the tray loading shown in FIGS. 3 to 5, the cam follower (61) of the drive lever (6) is connected to the third gear.
(3) is engaged with the first cam portion, and the drive lever (6) does not rotate even if the third gear (3) rotates, and remains stopped at the clockwise rotation end. Therefore, two slide drive plates (5
5) (55) is installed at the front (left side in the figure) moving end, the turntable (50) is held at the lower end, and the spindle motor (5) is
1) is a plurality of pins protruding from both sides of the motor base (52).
(54) and a plurality of cam grooves (56) (57) (58) formed in the slide direction on the slide drive plates (55) (55)
It is supported by a damage prevention member (150) attached so as not to contact at the lowered position of (51).

Thereafter, when the third gear (3) is further driven in the counterclockwise direction, as shown in FIG. 14, the cam follower (61) of the drive lever (6) is moved to the cam groove (33) of the third gear (3). ) 2nd cam part
(33b), the drive lever (6) rotates counterclockwise. As a result, the slide drive plate is driven backward, and the spindle motor is raised while being supported by the slide drive plate within the operating range of the second cam portion (33b),
Accordingly, the turntable 50 rises from the position shown in FIG. 8 to the position shown in FIG.

Further, when the third gear (3) is driven counterclockwise to operate the third cam portion (33c) of the cam groove (33), the relay drive plate (64) moves rearward in FIG. Upon reaching the moving end, the turntable (50) rises from the position of FIG. 7 to the position of FIG. 10, and the disk clamp is performed.

[0027]

[Effects of the Invention] A plurality of pins (54) protruding from both sides of a motor base (52) on which a spindle motor (51) is mounted, and a plurality of pins formed on the slide driving plates (55) and (55) in a sliding direction. A damage prevention member (150) is attached to the fixed chassis (13) so that the cam grooves (56), (57), (58) do not come into contact at the lowered position of the spindle motor (51). Because it is supported by the damage prevention member (150), impact force due to dropping during transportation does not act on the plurality of pins (54) and the plurality of cam grooves (56) (57) (58),
Breakage of the engaging portion between the motor base (52) and the slide drive plates (55) (55) can be prevented.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of an embodiment of the present invention.

FIG. 2 is a perspective view of a disc player according to the present invention.

FIG. 3 is a diagram showing a loading operation of the present invention.

FIG. 4 is a diagram showing a loading operation of the present invention.

FIG. 5 is a diagram showing a loading operation of the present invention.

FIG. 6 is a diagram showing a loading operation of the present invention.

FIG. 7 is a diagram showing a loading operation of the present invention.

FIG. 8 is a diagram showing a disk clamping operation of the present invention.

FIG. 9 is a diagram showing a disk clamping operation of the present invention.

FIG. 10 is a diagram showing a disk clamping operation of the present invention.

FIG. 11 is a side view of a slide drive plate of the disk clamp according to the present invention.

FIG. 12 is a rear view of the third gear.

FIG. 13 is a diagram showing a cam curve.

FIG. 14 is a plan view showing the operation of a drive lever and a side pressure release lever.

[Explanation of symbols]

 Reference Signs List 50 turntable 51 spindle motor 54 pin 55 slide drive plate 56 cam groove 57 cam groove 58 cam groove 150 damage prevention member

Claims (1)

(57) [Scope of request for utility model registration] 1. A turntable (50) driven by a spindle motor (51), and a tray drive mechanism (4) for driving a tray (44) from a disc ejection position to a completion of a loading position on the turntable (50). A disc clamping mechanism (7) for pressing the disc on the tray (44) to the turntable (50) and a pickup device (9) for recording or reproducing a signal on or from the disc on the turntable (50). In the disc player, the motor elevating mechanism for clamping the disc is supported so as to be able to move up and down with respect to the fixed chassis (13), and a motor base (52) having a spindle motor (51) attached thereto, and a motor base ( 52) two slide driving plates (55) and (55) which are arranged on both sides of the motor base (52) and are guided in a reciprocating motion in the horizontal direction along the fixed chassis (13), and both side surfaces of the motor base (52) Multiple projecting Pin (54)
A cam mechanism configured to engage with a plurality of cam grooves (56), (57), (58) formed in the slide drive plates (55), (55) in the sliding direction, respectively. A drive member reciprocated in the moving direction of the slide drive plates (55) and (55) by power, and a spring (59) interposed between the drive member and the slide drive plates (55) and (55). And a motor damage prevention member attached to the fixed chassis (13) so that the spindle motor (51) can be supported at the lowered position.
(150), when the spindle motor (51) descends,
The motor breakage prevention member (150) supports the plurality of pins (54) and the plurality of cam grooves (56) (57) (58) in place of the engagement support to protect the engagement portion. Become a disc player.