JP3863881B2 - Disc player - Google Patents

Description

  The present invention relates to a disc player such as a CD player or a DVD player.

  In the disc player, as shown in FIG. 10, a mechanism chassis (40) on which a turntable (41), a pickup device (42), a pickup transfer mechanism (9) and the like are mounted is disposed on a main chassis (10). The mechanism chassis (40) is driven up and down by a cam member (50) on the main chassis (10) by projecting the cam follower (46) projecting from the end of the mechanism chassis (40) on the turntable (41) side. Rotate (40) around the spindle (47) on the main chassis (10), press the disk on the turntable (41) against the chucking pulley (not shown), and place it on the turntable (41). The disc is chucked.

  As a structure for rotatably supporting the mechanism chassis (40), as shown in FIG. 11, an elevating drive member (30) is attached to the mechanism chassis (40) to form a mechanism deck, and the elevating drive member (30) The cam follower (46) protrudes and a shaft piece (48) protrudes in a direction perpendicular to the protruding direction of the cam follower (46), while the main chassis (10) has a bearing piece ( 16), the shaft piece (48) is rotatably received by the bearing piece (16), and the shaft piece (48) is supported by the hook-shaped holding member (7) having an elastic arm (71). It is practiced to hold the piece (16) so as to be rotatable (see Patent Document 1).

FIG. 12 (a) shows a state where the shaft piece (48) is held between the bearing piece (16) and the holding member (7) of the main chassis (10), and the elastic arm (71). The holding member (7) presses the shaft piece (48) toward the bearing piece (16) by the elastic restoring force. As a result, the shaft piece (48) is held between the bearing piece (16) and the holding member (7) without rattling in the vertical direction.
The holding member (7) can be elastically displaced in the backward direction by the distance G by the elastic arm (71), and the shaft piece (48) is positioned above the holding member (7) in the assembly process. The holding state shown in FIG. 12 (a) is obtained by pushing it downward vertically.

According to the structure shown in FIGS. 11 and 12 (a), even when a bad disk with a biased center of gravity is loaded, even if vibration occurs with the high-speed rotation of the disk, the shaft piece (48) can be Since it is held between the piece (16) and the holding member (7), the raising / lowering driving member (30) is not rattled by the vibration, and the raising / lowering driving member (30) is not rattled. Sound generation is suppressed.
JP 2003-196951 A [G11B25 / 04]

  However, in the structure shown in FIGS. 11 and 12A, when a large impact is applied from the outside during transportation of the disk player, the elastic arm 71 is greatly elastically deformed as shown in FIG. As a result, the holding of the shaft piece (48) by the holding member (7) may be released, which causes a problem that the elevating drive member is detached from the main chassis.

  Therefore, the object of the present invention is to prevent the shaft piece for rotatably supporting the mechanism deck from being held by the holding member on the main chassis even when a large impact is applied from the outside. It is to provide a disc player.

In the disc player according to the present invention, the mechanism deck (17) on which the turntable (41) and the pickup device (42) are mounted on the main chassis (1) and the disc on the turntable (41) are held. Chucking pulley (12). Also, a pair of shaft pieces (32) and (32) project outwardly on both sides of the mechanism deck (17), and each shaft piece (32) is rotatably supported on the main chassis (1). ing. The main chassis (1)
A bearing piece (15) for rotatably receiving the shaft piece (32) of the mechanism deck (17);
A direction having an elastic arm (64) projecting in a direction orthogonal to the shaft piece (32) and having elasticity in a direction approaching and separating from the bearing piece (15) and approaching the bearing piece (15) A hook-shaped holding member (6) for holding the shaft piece (32) rotatably on the bearing piece (15) by the elastic return force of
The elastic arm (64) of the holding member (6) receives elastic deformation in a direction away from the bearing piece (15) (retracting direction), and the elastic deformation amount of the elastic arm (64) is determined by the holding member ( 6) and a wall surface for restricting the shaft piece (32) to a size H that is not released , and the shaft piece (32) is connected to the bearing piece (15) and the holding member. insertion path for inserting up catching position between the (6) (61) is formed.

In the assembly process of the disc player of the present invention, the shaft piece (32) of the mechanism deck (17) is pushed along the insertion path (61) of the main chassis (1), and the bearing piece (15) and the holding member ( Insert to the holding position during 6).
Here, if a guide surface (62) for guiding the movement of the shaft piece (32) toward the holding position is formed on the holding member (6), the bearing piece (15) can be inserted. Accordingly, the holding member (6) is slightly elastically deformed in the backward direction, and the shaft piece (32) is held at the holding position.

In the disc player of the present invention, the shaft piece (32) protruding from the mechanism deck (17) is held between the bearing piece (15) on the main chassis (1) and the holding member (6). The shaft piece (32) is rotatably held on the bearing piece (15) by an elastic return force in a direction approaching the bearing piece (16) of the holding member (6).
Therefore, even if a bad disk with a biased center of gravity is chucked on the turntable (41) and vibration occurs due to the high-speed rotation of the disk, the mechanism deck (17) will not rattle, and the Sound generation is suppressed.
Further, even if the holding member (6) is elastically displaced in the backward direction due to a large impact from the outside, the elastic deformation of the holding member (6) may release the holding of the shaft piece (32). Since there is no restriction in the range, there is no possibility that the holding of the shaft piece (32) is released.

In a specific configuration, the mechanism deck (17) includes a mechanism chassis (4) provided with a turntable (41) and a pickup device (42), and an end of the mechanism chassis (4) on the turntable (41) side. It is comprised from the raising / lowering drive member (3) to engage, and a pair of said shaft piece (32) (32) is protrudingly provided by this raising / lowering drive member (3).
In this specific configuration, the mechanism chassis (4) is rotated by rotationally driving the elevating drive member (3) around the shaft pieces (32) and (32).

In another specific configuration, the mechanism chassis (4) has an end on the turntable (41) side elastically supported on the lifting drive member (3) and an end on the opposite side of the turntable (41). Is elastically supported on the main chassis (1).
According to this specific configuration, even if an excitation force is applied to the mechanism chassis (4), the vibration is absorbed by the elastic support, so that the signal reading operation by the pickup device (42) is normally performed. .

In a more specific configuration, the main chassis (1) includes a shaft piece (moving toward the holding position between the bearing piece (15) and the holding member (6) along the insertion path (61)). 32), a wall surface (14) facing the holding position is formed at a rear position of the holding position, and the lifting drive member (3) has the wall surface (14) from a position near the shaft piece (32) at the holding position. A projecting piece (33) projecting toward the center is provided.
According to the specific configuration, the shaft piece (32) is pushed into the holding position in the operation of assembling the mechanism deck (17) to the main chassis (1) by pushing the shaft piece (32) along the insertion path (61). Assuming that the mechanism deck (17) is inadvertently moved backward from the state it has just moved to, the projecting piece (33) contacts the wall surface (14) of the main chassis (1), preventing further retreat. Therefore, it is sufficient to push the mechanism deck (17) again toward the holding position of the shaft piece (32) from this state, and the workability is good.

  In the disc player according to the present invention, there is a possibility that the shaft piece for rotatably supporting the mechanism deck is released from the holding by the holding member on the main chassis even when a large impact is applied from the outside. Absent.

Hereinafter, one embodiment of the present invention will be specifically described with reference to the drawings.
In the disc player according to the present invention, as shown in FIG. 1, a tray (2) is supported on a main chassis (1) so as to be reciprocally movable, and a pulley support member (molded integrally with the main chassis (1)). A chucking pulley (12) is rotatably attached to 11). In the following description, the discharge direction of the tray (2) (lower left direction in FIG. 1) is “front”, and the accommodation direction of the tray (2) (upper right direction in FIG. 1) is “rear”.

The main chassis (1) is formed in a frame shape as shown in FIG. 3 and has an opening (18) in the center. A drive mechanism (8) is provided at a position in front of the opening (18). A pair of bosses (13) and (13) project upward from both rear ends of the opening (18).
As shown in FIGS. 1 and 2, a mechanism deck (17) is disposed in the opening (18) of the main chassis (1) so as to be movable up and down, and the tray (2) is reciprocated by the drive mechanism (8). The mechanism deck (17) is driven up and down.

  The mechanism deck (17) is composed of a mechanism chassis (4) and a lift drive member (3) shown in FIG. 3. The mechanism chassis (4) includes a turntable (41), a pickup device (42), and a pickup transfer mechanism. (9) and the like are mounted, and the pickup device (42) is guided to reciprocate by a pair of guide shafts (43) and (43). Further, elastic members (44) for elastically supporting the mechanism chassis (4) are provided at the four corners of the mechanism chassis (4) as described later.

The elevating drive member (3) is made of synthetic resin, and the front portion (35) on which the end portion on the turntable (41) side of the mechanism chassis (4) is to be installed, and both end portions of the front portion (35) It is comprised from the arm part (36) and (36) which protruded in this.
As shown in FIG. 5, a pair of cam followers (31) and (31) project forward from the front portion (35) of the elevating drive member (3), and both arm portions (36) and (36) are provided. A pair of shaft pieces (32) and (32) are projected outward from the tip portion. Further, projecting pieces (33) are provided in the vicinity of the shaft pieces (32) and (32) of both arm portions (36) and (36), respectively, so as to protrude rearward. Furthermore, a pair of bosses (34) and (34) are projected upward at both ends of the front portion (35) of the elevating drive member (3).

The four elastic members (44) arranged at the four corners of the mechanism chassis (4) are each formed in a cylindrical shape as shown in FIG. 4, and the main chassis (1) is formed in the center hole of the rear two elastic members (44). The upper boss (13) penetrates, and a screw (45) is screwed into the head of the boss (13) to prevent the elastic member (44) from coming off. As a result, the rear end of the mechanism chassis (4) is elastically supported on the main chassis (1).
Further, the boss (34) on the lifting drive member (3) shown in FIG. 3 passes through the central hole of the two front elastic members (44), and the front end of the mechanism chassis (4) is lifted and lowered in the same manner. It is elastically supported on the drive member (3).

As shown in FIG. 3, the main chassis (1) is provided with a cam member (5) that is driven back and forth by a drive mechanism (8) at a position in front of the elevating drive member (3). The cam member (5) is provided with a pair of cam grooves (51) and (51) that engage with the pair of cam followers (31) and (31) of the elevating drive member (3). ) Reciprocatingly moves the cam followers (31) and (31) of the lift drive member (3).
Also, the main chassis (1) has bearings for rotatably supporting the shaft pieces (32) at positions opposed to the tip portions of both arms (36) and (36) of the lifting drive member (3). A piece (15) and a holding member (6) are formed.

The bearing piece (15) is formed by a vertical wall extending in the front-rear direction as shown in FIG. On the other hand, the holding member (6) is formed in a hook shape, and includes an elastic arm (64) that rises in the vertical direction, and can be elastically displaced in a direction approaching and separating from the bearing piece (15). The shaft piece (32) is rotatably held between the bearing piece (15) and the holding member (6).
The main chassis (1) is formed with an insertion path (61) for inserting the shaft piece (32) to a holding position between the bearing piece (15) and the holding member (6). . The insertion path (61) includes a vertical portion and a horizontal portion that follows the vertical portion.
The amount of elastic displacement of the holding member (6) in the direction away from the bearing piece (15) due to elastic deformation of the bearing piece (15) is the amount of the shaft piece (32 by the bearing piece (15) and the holding member (6). ) Is restricted to a size H that will not be released.

In the assembly process of the disc player according to the present invention, first, the two elastic members (44) and (44) in front of the mechanism chassis (4) shown in FIG. 3 are moved to the two bosses (34) of the elevating drive member (3). (34) is fitted, and the elevating drive member (3) is attached to the mechanism chassis (4).
Next, as shown in FIGS. 7 (a) and 8 (a), the elevating drive member (3) and the mechanism chassis (4) are tilted in an oblique posture, and the shaft piece (32) is inserted into the insertion path (61). The shaft piece (32) is inserted into the insertion path (61) by being pushed downward from the upper position.
Thereafter, as shown in FIGS. 7B and 8B, the shaft piece 32 is further inserted into the insertion path 61 while rotating the elevating drive member 3 and the mechanism chassis 4 toward the horizontal posture. )
Then, as shown in FIGS. 7 (c) and 8 (c), the elevating drive member (3) and the mechanism chassis (4) are moved forward while being brought closer to the horizontal posture, and the cam follower (31) is moved to the cam member (31). 5), the shaft piece (32) is pushed between the bearing piece (15) and the holding member (6).

  As shown in FIG. 6, the main chassis (1) is formed with a guide surface (63) for facilitating the insertion operation of the shaft piece (32) into the insertion path (61). Further, a guide surface (62) for facilitating the pushing operation of the shaft piece (32) to the holding position is formed on the holding member (6).

  In this manner, the cam followers (31) and (31) of the elevating drive member (3) are fitted into the cam grooves (51) of the cam member (5), and the shaft piece (32) is associated with the bearing piece (15). At the same time, the two elastic members (44) and (44) shown in FIG. 3 are pushed into the holding position between the holding members (6) and the two bosses (13) and (13) at the rear of the main chassis (1). Fit it into.

As a result, the shaft piece (32) is held by the bearing piece (15) and the holding member (6) as shown in FIG. 9 (a). At this time, the elastic arm (64) is elastically deformed slightly in a direction away from the bearing piece (15) as the shaft piece (32) is pushed in, and the elastic return force causes the shaft piece (32) to be Pressed onto the strip (15).
Thus, as shown in FIG. 2, the mechanism deck (17) is assembled to the main chassis (1) so as to be driven up and down.

In the above disk player, when a disk is placed on the tray (2) and a loading start command is given, the drive mechanism (8) is activated, and the tray (2) is first driven in the horizontal direction. ) The upper disk is conveyed to a position above the turntable (41).
Next, the cam member (5) is driven in the horizontal direction by the drive mechanism (8), thereby driving the cam follower (31) upward, and the mechanism deck (17) is raised from the lower end to the upper end, The disk is lifted by the turntable (41), and the disk is further pressed against the chucking pulley (12) to complete the chuck.

  In the raising / lowering operation of the mechanism deck (17), the raising / lowering drive member (3) pivots up and down around the shaft pieces (32), (32), and the mechanism chassis (4) has two elastic members (rear) 44) It will turn up and down with (44) as a fulcrum.

After the disk chucking is completed, the turntable (41) rotates at a high speed, and the pickup device (42) is transported in the disk radial direction so that a signal is read from the disk or a signal is written to the disk.
In this process, the vibration applied to the mechanism chassis (4) is absorbed by the four elastic members (44).

  According to the disc player of the present invention, the holding member (6) presses and holds the shaft piece (32) on the bearing piece (15) by the elastic return force of the elastic arm (64) as shown in FIG. 9 (a). Therefore, even if a bad disk with a biased center of gravity is placed on the turntable (41) and vibration occurs with the high-speed rotation of the disk, the lifting drive member (3) will not rattle. And the generation of abnormal noise is suppressed.

  Even if a large impact is applied from the outside and the elastic arm (64) is elastically deformed as shown in FIG. 9B, the elastic deformation amount of the elastic arm (64) is equal to the bearing piece (15) and the holding member ( 6) Since the holding of the shaft piece (32) according to 6) is regulated to a size H that cannot be released, the holding of the shaft piece (32) is not completely released, and the elastic arm thereafter Due to the elastic return of (64), the shaft piece (32) is again held by the bearing piece (15) and the holding member (6) in a state without backlash (FIG. 9 (a)).

Further, in the assembly process shown in FIGS. 7 and 8, the mechanism chassis (4) is inadvertently moved backward from the state in which the shaft piece (32) has moved to just before the holding position as shown in FIG. 8 (b). As the projecting piece (33) contacts the wall surface (14) of the main chassis (1) formed at the rear of the projecting piece (33), further retreat is prevented. Can be pushed horizontally toward the holding position of the shaft piece (32), and workability is good.
Furthermore, since the mechanism deck (17) is inclined and incorporated into the main chassis (1), the pulley support member (11) does not get in the way, so the pulley support member (11) is integrated with the main chassis (1). Molding is possible, and this reduces the number of parts.

  In addition, each part structure of this invention is not restricted to the said embodiment, A various deformation | transformation is possible within the technical scope as described in a claim. For example, the mechanism deck (17) is not limited to the assembly structure of the mechanism chassis (4) and the lift drive member (3), and the cam follower (31) and the shaft piece (32) are directly attached to the mechanism chassis (4). It is also possible to adopt a protruding structure.

1 is a perspective view showing an external appearance of a disc player according to the present invention. FIG. 3 is a perspective view of the disc player in which a tray is omitted. FIG. 3 is an exploded perspective view of the disc player. It is sectional drawing which shows the elastic support structure of a mechanism chassis. It is a perspective view of a raising / lowering drive member. It is a perspective view of a bearing piece and a holding member. It is a series of side views showing a process of incorporating a mechanism deck into the main chassis. It is a series of side views which expand and show the principal part of a process same as the above. It is sectional drawing explaining the holding structure of the shaft piece by a bearing piece and a holding member, and its operation | movement. It is a top view of the conventional disc player. It is a perspective view of the bearing piece and the holding member in the conventional disc player. It is sectional drawing explaining the holding structure of the shaft piece by the bearing piece and the holding member in the conventional disc player, and its operation | movement.

Explanation of symbols

(1) Main chassis
(12) Chucking pulley
(15) Bearing piece
(17) Mechanism deck
(2) Tray
(3) Lifting drive member
(31) Cam followers
(32) Shaft piece
(33) Projection
(4) Mechanism chassis
(41) Turntable
(42) Pickup device
(5) Cam member
(6) Holding members
(61) Insertion path
(64) Elastic arm

Claims (5)

On the main chassis (1) is a mechanism deck (17) equipped with a turntable (41) and a pickup device (42), and a chucking pulley (12) for holding a disk on the turntable (41). A pair of shaft pieces (32) and (32) project outwardly on both sides of the mechanism deck (17), and each shaft piece (32) is rotatably supported on the main chassis (1). The disk that pushes the disk on the turntable (41) against the chucking pulley (12) and chucks it by rotating the mechanism deck (17) about an axis orthogonal to the rotation axis of the turntable (41). In the player, the main chassis (1)
A bearing piece (15) for rotatably receiving the shaft piece (32) of the mechanism deck (17);
A direction having an elastic arm (64) projecting in a direction orthogonal to the shaft piece (32) and having elasticity in a direction approaching and separating from the bearing piece (15) and approaching the bearing piece (15) A hook-shaped holding member (6) for holding the shaft piece (32) rotatably on the bearing piece (15) by the elastic return force of
The elastic arm (64) of the holding member (6) receives elastic deformation in a direction away from the bearing piece (15), and the elastic deformation amount of the elastic arm (64) is determined by the shaft of the holding member (6). And a wall surface for restricting the piece (32) to a size H that will not be released , and the shaft piece (32) between the bearing piece (15) and the holding member (6). A disc player , characterized in that an insertion path (61) for insertion to a holding position is formed.   The mechanism deck (17) is a mechanism chassis (4) provided with a turntable (41) and a pickup device (42), and a lift drive that engages with an end of the mechanism chassis (4) on the turntable (41) side. A pair of shaft pieces (32), (32) projecting from the lifting drive member (3), and the lifting drive member (3) is rotated around the shaft pieces (32), (32). The disc player according to claim 1, wherein the mechanism chassis (4) is rotated by being driven to rotate.   The mechanism chassis (4) has an end on the turntable (41) side elastically supported on the elevating drive member (3) and an end opposite to the turntable (41) on the main chassis (1). The disc player according to claim 2, wherein the disc player is elastically supported by the disc player.   The main chassis (1) has a position behind the shaft piece (32) that moves toward the holding position between the bearing piece (15) and the holding member (6) along the insertion path (61). A wall surface (14) facing the holding position is formed, and the elevating drive member (3) has a protruding piece protruding from the position near the shaft piece (32) at the holding position toward the wall surface (14). The disc player according to claim 2 or 3, wherein (33) is provided. The guide member (62) for guiding the movement of the shaft piece (32) toward the holding position is formed on the holding member (6). Disc player.

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