JP2000090596A - Disk player - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the load receiving from a flexible wiring board by latching a connecting part and a folded part of the flexible wiring board to a transfer base at the position to the side of an opposite circuit board from the confronted surface on the transfer base, and correcting the flexible wiring board extended between the latched part and the folded part to face to the direction parallel with a disk rotating surface. SOLUTION: The flexible wiring board 3 is folded by nearly 180 deg. at the intermediate part, and one end part is connected to the surface confronted with the circuit board 5 on the transfer base 21 of a pickup device 2, and another end part is connected to a connector 51 on the circuit board 5. The part between the connecting part and the folded part of the flexible wiring board 3 to the transfer base 21 is latched at the position to the side of the opposite circuit board 5 from the confronted surface on the transfer base 21, then a latching mechanism is provided for correcting the flexible wiring board 3 to face to the direction parallel with the disk rotating surface. The flexible wiring board 3 keeps the parallel attitude to the disk surface independently of the transfer position of the pickup device 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc player for recording a signal on a disc or reproducing a signal from the disc, such as a compact disc player, a mini disc player, a digital video disc player, and the like.

[0002]

2. Description of the Related Art In a disk player of this type, as shown in FIG. 5, a spindle motor (11) for rotating a disk (10) at a high speed is mounted on a chassis (1). A pair of guide shafts (12) and (13) extending in parallel to the radial direction of the disc (10) are installed, and the pickup device (2) can reciprocate in the radial direction of the disc (10) by both guide shafts (12) and (13). Supported. Pickup device
In (2), an optical system (23) such as a laser source and an objective lens (22) are mounted on a transfer table (21) slidably engaged with the guide shafts (12) and (13) on both sides. Deployed and configured. A reciprocating drive mechanism (not shown) is connected to the pickup device (2), whereby the pickup device (2) is moved in the disk radial direction.

As shown in FIGS. 6A and 6B, a chassis
A circuit board (5) for performing processing for recording and reproducing signals is attached to (1) in parallel with the rotating surface of the disk (10), and a pickup device (2) is mounted on the disk (10). And the space between the circuit board (5). Pickup device
(2) and the circuit board (5) are electrically connected to each other by a flexible wiring board (3), and one end of the flexible wiring board (3) faces the circuit board (5) of the transfer table (21). The other end is connected to the connector (51) on the circuit board (5). Here is the flexible wiring board
(3) extends from the back surface of the transfer table (21) toward the inner peripheral side of the disk, is folded back 180 degrees, further extends along the surface of the circuit board (5) toward the outer peripheral side of the disk, and 5) A loop (31) is formed at the folded portion on the inner peripheral side of the disk, reaching the connector (51) on the upper side. At the time of signal reproduction, an electric signal obtained from the pickup device (2) is supplied to the circuit board (5) via the flexible wiring board (3), and necessary signal reproduction processing is performed on the electric signal.

A lead-in switch (17) for detecting that the pickup device (2) has reached the innermost peripheral edge of the disk is provided on the circuit board (5), while a transfer table (5) is provided. A lever (6) having a bent portion (61) for pressing the lead-in switch (17) is attached to the side surface of (21).

[0005]

In a disk player, for example, during signal reproduction, the pickup device (2) is smoothly moved in the radial direction of the disk in accordance with the rotation of the disk (10). It is necessary to accurately trace the spiral track formed on the signal surface of the optical disk. Further, when performing a search, an interlaced search or the like, it is necessary to move the pickup device (2) in the radial direction of the disk at a high speed. Therefore, in a disc player,
The pickup device (2) is designed so that the load at the time of transfer is minimized.

However, in the conventional disk player, the pickup device (2) is located at the outermost end of the disk as shown in FIG. 6 (a), and the pickup device (2) is located as shown in FIG. In the state located at the innermost peripheral edge of the disk, the shape and radius of the loop (31) formed at the folded portion of the flexible wiring board (3) are different.
At the innermost peripheral edge of the disk shown in FIG. 2B, the loop (31) is greatly loosened, and a difference occurs in the elastic return force of the flexible wiring board (3). As a result, the load received from the flexible wiring board (3) in the process of transferring the pickup device (2) from, for example, the outermost end to the innermost end of the disk varies greatly. When such a load fluctuation occurs, the transfer operation of the pickup device (2) becomes unstable.

Therefore, as shown in FIG. 7, a large gap is provided between the pickup device (2) and the flexible wiring board (3), and the flexible wiring board (3) extending from the back surface of the transfer table (21) is mounted on the circuit board. Loop (31) with posture parallel to (5)
If the configuration is such that the flexible wiring board (3) does not loosen as described above, regardless of the position of the pickup device (2), the load received from the flexible wiring board (3) can be reduced and the load can be increased. However, there is a problem that the size of the disc player increases due to the increase in the gap.

An object of the present invention is to keep the load received from the flexible wiring board smaller and more constant than before, regardless of the position of the pickup device.
An object of the present invention is to provide a disk player which does not increase the size of the apparatus.

[0009]

In the disk player according to the present invention, the flexible wiring board (3) is folded back at about 180 degrees at an intermediate portion, and one end of the flexible wiring board (3) is provided on the transfer table (2) of the pickup device (2). The other end is connected to the connector (51) on the circuit board (5) while being connected to the surface of the circuit board (5) facing the circuit board (5). The transfer table (21) is provided at a position on the counter circuit board (5) side with respect to the opposing surface to lock the connection between the connecting portion of the flexible wiring board (3) to the transfer table (21) and the folded portion. There is provided a locking mechanism for correcting the flexible wiring board (3) extending between the locking portion and the folded portion in a direction parallel to the disk rotation surface.

In the disk player according to the present invention, regardless of the transfer position of the pickup device (2), the flexible wiring board (3) has an area extending between the locking portion by the locking mechanism and the folded portion. It is held in a posture parallel to the rotation plane. Therefore, the loop (31) formed at the folded portion of the flexible wiring board (3) always exhibits a semicircular arc shape regardless of the transfer position of the pickup device (2), and its radius is the same as that of the conventional loop. It is kept at a constant value larger than the radius. As a result, the load acting on the transfer of the pickup device (2) is kept constant.

In a specific configuration, a lead-in switch (17) for detecting that the pickup device (2) has reached the innermost peripheral end of the disk is provided on the circuit board (5). On the transfer table (21) of the device (2),
A lever (4) for pressing the lead-in switch (17) is protruded, and the locking mechanism comprises a pair of arms (42) (43) protruded in parallel with each other at the base end of the lever (4). ), And flexible wiring board by both arms (42) (43)
(3) is pinched and locked. According to this specific configuration, the pair of arms (42) and (43) as the locking mechanism can be integrally formed with the lever (4) that is conventionally provided on the transfer table (21). Thereby, the present invention can be realized without increasing the number of parts.

[0012]

In the disk player according to the present invention, the load received from the flexible printed circuit board (3) during the transfer of the pickup device (2) is smaller than that of the conventional one regardless of the position of the pickup device (2). Since there is almost no fluctuation, the transfer of the pickup device (2) is performed very smoothly. In addition, the pickup device (2) is connected to the circuit board (5).
Even when the disk player is arranged as close as possible to downsize the disc player, the locking mechanism is provided at a predetermined height on the circuit board (5) so that the flexible wiring board (3) can be provided.
From the connecting portion to the transfer table (21) to the locking portion by the locking mechanism, and raise the loop (3
Since the radius of 1) can be set to a sufficient size,
The load does not fluctuate due to the flexible wiring board (3), and the transfer of the pickup device (2) is performed smoothly.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be specifically described below with reference to the drawings. As shown in FIG. 1, the disc player according to the present invention is provided on a chassis (1).
A spindle motor (11) for rotating a disk (not shown) at a high speed is mounted, and a pair of guide shafts (12) (13) extending parallel to the disk radial direction are provided in an opening (15) of the chassis (1). ), And the pickup device (2) is supported by both guide shafts (12) and (13) so as to be able to reciprocate in the disk radial direction. The pickup device (2)
An optical system (23) such as a laser source and an objective lens are mounted on a transfer table (21) whose both sides are slidably engaged with the guide shafts (12) and (13).
It is configured by deploying (22). Pickup device (2)
Is connected to a reciprocating drive mechanism using a feed motor (14) as a drive source, whereby the pickup device (2) is moved in the disk radial direction.

As shown in FIGS. 4 (a), 4 (b) and 4 (c), a circuit board (5) for processing for recording and reproducing signals is provided below the chassis (1). The pickup device (2) is mounted close to the pickup device (2) in a posture parallel to the rotation surface of (10), and is transferred in the space between the disk (10) and the circuit board (5). Pickup device
(2) and the circuit board (5) are electrically connected to each other by a flexible wiring board (3), and one end of the flexible wiring board (3) faces the circuit board (5) of the transfer table (21). A terminal portion (32) provided at the other end is connected to a connector (51) on the circuit board (5). Here, the flexible printed circuit board (3) extends horizontally from the rear surface of the transfer table (21) toward the inner peripheral side of the disk, is folded back by 180 degrees, and further along the surface of the circuit board (5) to the outer peripheral side of the disk. To the connector (51). At the time of signal reproduction, an electric signal obtained from the pickup device (2) is supplied to the circuit board (5) via the flexible wiring board (3), and necessary signal reproduction processing is performed on the electric signal.

A lead-in switch (17) for detecting that the pickup device (2) has reached the innermost peripheral edge of the disk is provided on the circuit board (5), while a transfer table (5) is provided. A lever (4) having a bent portion (41) for pressing the lead-in switch (17) is attached to the side surface of (21). At the base end of the lever (4), as shown in FIG. 3, at the same height position as the upper surface of the transfer table (21), a plane parallel to the disk rotation surface is orthogonal to the transfer direction of the pickup device. A pair of arms (42) and (43) extending in parallel to each other in the direction in which they extend. In addition, one arm (42) on the transfer table (21) side
Is formed at a position slightly lower than the other arm (43) (see FIGS. 4 (a), (b) and (c)).

As shown in FIGS. 2 and 4 (a), (b) and (c), the flexible wiring board (3) has its intermediate portion sandwiched between the pair of arms (42) and (43) as described above. Thereby, the path from the pickup device (2) to the circuit board (5) is corrected. That is, the flexible printed circuit board (3) extending horizontally from the back surface of the transfer table (21) of the pickup device (2) is bent nearly 90 degrees along the side surface of the transfer table (21) to form a pair of arms (42). (43), and then bent nearly 90 degrees to a horizontal position.
After reaching the upper surface of 2), further passing through the lower surface of the other arm (43), the posture is corrected to a posture parallel to the disk rotation surface, and then folded back by 180 degrees. Also form a large-diameter loop (31).

Therefore, the pickup device (2) is shown in FIG.
Flexible wiring extending from a pair of arms (42) and (43) in the process of being transferred from the outermost peripheral end of the disk to the innermost peripheral end of the disk shown in FIG. The posture of the substrate (3) is maintained horizontal, and the pickup device
Regardless of the transfer position of (2), the loop (31) has a semicircular arc shape, and its radius is maintained at the same value. That is, in a configuration in which the pickup device (2) and the circuit board (5) are arranged as close as possible to each other, as shown in FIG. 7, equivalent to a conventional disc player in which the slack of the flexible wiring board (3) is eliminated. The effect of can be obtained.

As a result, the load received by the pickup device (2) from the flexible wiring board (3) becomes a constant value smaller than the conventional load regardless of the transfer position of the pickup device (2), and a load fluctuation occurs. Absent. Thereby, the pickup device (2) is smoothly transferred.

As described above, according to the disk player of the present invention, it is possible to realize smooth transfer of the pickup device (2) without increasing the size of the device. In addition, since a pair of arms (42) and (43) serving as a locking mechanism of the present invention is integrally molded with a lever (4) that is conventionally provided for operating the lead-in switch (17), The effect of the present invention can be obtained without increasing the number of parts.

The configuration of each part of the present invention is not limited to the above embodiment, and various modifications can be made within the technical scope described in the claims. For example, as the locking mechanism, a lever
Not limited to the configuration in which a pair of arms (42) and (43) are protruded from (4),
Various configurations capable of correcting the orientation of the flexible wiring board can be employed.

[Brief description of the drawings]

FIG. 1 is a plan view showing a main part of a disc player according to the present invention.

FIG. 2 is a perspective view showing a lever attached to a transfer table.

FIG. 3 is a perspective view showing a pair of arms protruding from a lever.

FIG. 4 shows a state of deformation of a flexible wiring board accompanying the transfer of the pickup device in the disk player of the present invention.
It is a side view showing (a), (b), and (c).

FIG. 5 is a perspective view showing a main part of a conventional disc player.

FIG. 6 shows a state of deformation of a flexible printed circuit board accompanying transfer of a pickup device in a conventional disk player.
It is a side view showing (a) and (b).

FIG. 7 is a side view showing another conventional example.

[Explanation of symbols]

 (1) Chassis (11) Spindle motor (2) Pickup device (21) Transfer stand (22) Objective lens (3) Flexible wiring board (31) Loop (32) Terminal (4) Lever (42) Arm (43) Arm (5) Circuit board

Claims (2)

[Claims] 1. A disk player for recording a signal on a disk or reproducing a signal from a disk, comprising a chassis (1) having an objective lens on a transfer table (21) capable of reciprocating along a radial direction of the disk. A pickup device (2) equipped with (22) is provided so as to be capable of reciprocating drive,
A circuit board (5) for recording or reproducing signals is fixed in parallel with the disk rotation surface, and a pickup device is provided.
(2) and the circuit board (5) are electrically connected to each other by a flexible wiring board (3),
(3) is folded back at the middle part, and one end is
(21) is connected to the surface facing the circuit board (5), and the other end is connected to the connector (51) on the circuit board (5). Is provided at a position on the side opposite to the circuit board (5) with respect to the opposing surface, for locking between the connecting portion of the flexible wiring board (3) to the transfer table (21) and the folded portion, A disk player provided with a locking mechanism for correcting the flexible wiring board (3) extending between the first and second folded portions in a direction parallel to the disk rotation surface. 2. A pickup device on a circuit board (5).
While a lead-in switch (17) for detecting that (2) has reached the innermost peripheral edge of the disk is provided, a lead-in switch (1) is provided on the transfer table (21) of the pickup device (2).
A lever (4) for pressing the lever (7) is protruded, and the locking mechanism is constituted by a pair of arms (42) and (43) protruding from the base end of the lever (4) in parallel with each other. , Both arms (42) (4
2. The disk player according to claim 1, wherein the flexible printed circuit board (3) is sandwiched and locked by (3).