JP2541391B2 - Disc player - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention records, for example, music or video by converting it into a digital signal, or recording the recorded disc on a turntable, and recording information on both sides or one side of the disc by a pickup.
Or, it relates to a disc player for reproducing information.

[0002]

2. Description of the Related Art Conventionally, there has been a technique in which a disc is horizontally supported by a turntable and a pickup is moved to the upper and lower faces of the disc to read information on the upper and lower faces of the disc.

[0003]

In the prior art described above, the pickup is mounted on the turn carriage to move the pickup up and down, but the lock arm for fixing the pickup to the turn carriage is elastically locked. A spring or other force is required to repress the force, which is troublesome to install and assemble, and the spring force is constantly generated, which increases the load on the lock arm and prevents movement of the turn carriage or lock arm operation. There is a problem in that it tends to be stable, and it is difficult to reduce the driving force of the turn carriage and simplify the structure of the turn carriage.

[0004]

SUMMARY OF THE INVENTION Therefore, according to the present invention, in a disc player having a turn carriage for moving the pickup to both sides of the disc, a lock arm for fixedly supporting the pickup is attached to the turn carriage.
A structure in which a turn base provided with a turn carriage is provided with a lock arm disengagement body, and the lock arm is kept in engagement with the pickup by abutting and supporting the lock arm on the turn base. Since the elastic load of the spring etc. like in the past is unnecessary and the operation load of the lock arm is made smaller than the conventional one, the turn carriage movement or the lock arm operation can be stably performed. It is possible to easily reduce the driving force and simplify the structure of the turn carriage.

[0005]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a partial side view of the turn carriage, and FIG. 2 is an overall plan view of the turn carriage. The upper and lower deck chassis (2) (3) are provided with a rectangular box-shaped case (1) and are integrally connected in a U-shape in side view. Is fixed to the inside of the case (1), the turntable motor (4) is fixed to the lower deck chassis (3), and the turntable (6) is attached to the upper end of the output shaft (5) of the motor (4). Fix it.

A video disk (7) having a diameter of 30 cm, a video disk (8) having a small diameter of 20 cm, a compact disk (9) having a diameter of 12 cm, and a compact disk (10) having a diameter of 8 cm are mounted. A tray (15) having disk mounting surfaces (11), (12), (13) and (14) is provided, and the tray (15) is attached to the case (1) of the main body via left and right slide rails (16) and (16). When the tray (15) is inserted into the case (1), the tray (15) descends and the disks (7) to (10) are placed on the turntable (6). , Chuck arm (1
7) Lower the chuck plate (18) supported by
The discs (7) to (10) are moved by the chuck plate (18).
Is fixed to the turntable (6), and the disks (7) to (10) are rotated integrally with the turntable (6).

Further, as shown in FIGS. 3 to 5, a pickup stand (21) for mounting a laser pickup (19), a traveling motor (20) and the like, and disks (7) (8) supported on a turntable (6). ) Is provided with upper and lower pickup guide bodies (22) and (23) for moving and guiding the pickup (19), and each guide body (22)
(23) The front end side is vertically swingably attached to the deck chassis (2) and (3) by the tilt adjustment fulcrum shafts (24) and (25), and the rear end side of the upper pickup guide body (22) is used for tilt adjustment. The weight is tilted downward to the position of the stopper (26) by its own weight so that the maximum downward warp angle (about 2 degrees downward with respect to the horizontal line) is obtained, and the rear end of the lower pickup guide body (23) has the maximum upward warp for tilt adjustment. The spring (27) raises and tilts it to the position of the stopper (28) so as to form an angle (about 1 degree upward with respect to the horizontal line), and the turntable (6) supports the discs (7) and (8). Upper and lower pickup guide bodies (22) and (23) are attached so that the tilt can be adjusted on both the upper and lower sides.

Further, pickup rails (29) (3) slidably fitted and inserted into the pickup base (21).
0) and the output gear (31) of the traveling motor (20) are elastically meshed by a spring (32) with a rack gear (33).
(34) to the upper and lower pickup guide bodies (22) (2
3) are respectively fixed at symmetrical positions, and a guide roller (35) is pivotally supported on the side of the pickup table (21) opposite to the output gear (31) to roll the guide groove (35). 36) (37) to each guide body (22)
(23) The rack gear is formed on one side, and the pickup rails (29) and (30), the rack gears (33) and (34), and the guide grooves (36) and (37) extend substantially parallel to the front-rear direction. (33) (34) and guide groove (36)
Pickup rails (29) and (30) are arranged between (37).

Further, as shown in FIG. 6, a pressure roller (39) is attached to the side of the pickup base (21) provided with the guide roller (35) through a leaf spring (38), and an upper pickup guide body (22). The pressure roller (39) is brought into pressure contact with the guide groove (36) surface on one side of which is bent, and the guide roller (35) is provided on the guide groove (36) surface on the same side as the surface on which the pickup rail (29) is provided. The guide roller (35) is pressed against the same surface as the pickup rail (29) mounting surface to improve the support position accuracy of the pickup (19) and to mount the pickup rail (29) mounting part. Is configured so that the same structure as the lower pickup rail (30) can be used.

Further, as shown in FIG. 7, a pickup table (2) is provided between the upper and lower pickup guide bodies (22) and (23).
The turn carriage (40) is provided with a turn carriage (40) for moving 1), and a rear plate (41) which is a turn base fixedly mounted on the rear surface of the deck chassis (2) (3) via a center pin (42). Rotatably slidably supporting the center pin (42) slidably and rotatably in the long hole (43) of the turn carriage (40) which is substantially vertical at the pick-up / removal position (21). Disk (7) to be supported by the turntable (6)
The turn carriage (40) is configured to move up and down and rotate between the upper and lower surfaces of (8).

The pickup rail (29)
Similar to (30), the bearing hole (4) of the pickup base (21)
4) Front and rear spherical guide body (45) slidably fitted in
(46), each of the spherical guide bodies (45) is provided on the extension of the pickup rails (29) and (30) when the pickup carriage (21) is moved in and out of the turn carriage (40).
The spherical guide bodies (45) and (46) are fixedly mounted on the turn carriage (40) so that the (46) are located substantially in a line, and the conical trapezoidal head portion (29a) of the pickup rails (29) and (30). The front spherical guide body (45) facing the (30a) is formed in a rugby ball shape, and the rear rear spherical guide body (46) is formed in a truncated cone shape. The pickup guide bodies (22) and (23) The pickup base (21) is advanced to a predetermined position of the turn carriage (40) through the rack gears (33) and (34), and the spherical guide bodies (45) and (46) are attached to the pickup base (21).
The output gear (31) while being fitted into the bearing hole (44) of
By reversing the rotation of the turn carriage (40) through the rack gears (33) (34), the pickup guide body (2
2) The pickup table (21) is made to exit the (23).

Further, a pin (48) to be engaged with the engaging notch (47) of the turn carriage (40) is fixedly mounted on the pickup base (21), and the notch (47) and the pin (4).
The engagement of 8) prevents rotation of the pickup base (21) around the spherical guide bodies (45) (46) and also the projection (49) on the bottom side of the pickup base (21).
A lock arm (50) that is detachably engaged with the
The lock arm (50) is rotatably attached to the turn carriage (40) through a bearing body (51), and the lock arm (50) is disengaged from the upper and lower horizontal projection surfaces (5).
2) (53) is integrally formed with the rear plate (41), and the lock arm (50) is provided on one end side with the vertical horizontal projection surfaces (52) (53) of the rear plate (41) at the lifting end of the turn carriage (40). And the other end of the lock arm (50) is laid down in the unlocked posture to move the pickup carriage (21) in and out of the turn carriage (40), while otherwise locked to the rear plate (41). The one end of the arm (50) is slidably contacted with the protrusion (49) while the other end of the lock arm (50) in a standing posture is kept engaged, and the turn carriage (4) is held.
The pickup table (21) is fixedly supported on the (0) to prevent the pickup table (21) from moving in and out.

Further, a drive gear (54) for raising and lowering and rotating the turn carriage (40) is provided, and the gear (54) is pivotally supported by the center pin (42) and the back plate (41). ), A turn carriage motor (55) is fixedly installed, and the drive gear (54) is driven by the motor (55) in the forward and reverse directions.

Further, a cam groove (56) for moving the turn carriage (40) up and down and rotating is provided in the rear plate (41), and the drive groove (5) is provided in the drive gear (54).
7) is provided, and the moving pin (58) for fixing to the turn carriage (21) is slidably engaged with the cam groove (56) and the drive groove (57). The rotation of the drive gear (54) The pin (58) moves in the drive groove (57) by the drive groove, and the pin (58) moves up and down and rotates by the guide of the cam groove (56), and the turn carriage (40) with the center pin (42) as a reference. ) Is moved up and down and rotated.

Then, as shown in FIG. 8A, the cam groove (5
When the moving pin (58) is located at one end of the elevating part of the drive groove (57) at the lower end of the lower elevating guide part of 6), the lock arm (50) contacts the lower horizontal projecting surface (53). It touches and is supported in the unlocked posture while lying down, and the pickup table (21) can be moved between the lower pickup guide body (23) and the turn carriage (40).

Further, when the turn carriage (40) receives the pickup table (21) in the state of (a) of FIG. 8, it is detected and the motor (55) is operated to drive the drive gear (54). 7, the turn carriage (40) rises at this time, and the lock arm (50) that stands up by sliding the lock arm (50) to the back plate (41) is picked up. 8 (b), the pickup base (21) is forcibly pulled in by the engaging force of the lock arm (50), as shown in FIG. 8 (c). , Lock arm (50) and pin (48)
The pickup base (21) is fixedly supported on the turn carriage (40) by the spherical guides (45) and (46).

The drive gear (54) is set to about 180
When the drive gear (54) is rotated about 360 degrees, the turn carriage (40) rotates when the drive gear (54) rotates about 360 degrees. It rotates about 180 degrees and is supported downward, and the drive gear (54)
Is rotated about 270 degrees, the turn carriage (40) rises, and by detecting this, the motor (55) is stopped, so that the lock arm (50) abuts the upper horizontal projecting surface (52) and unlocks. The pickup carriage (40) is supported in a posture and is moved downward from the turn carriage (40) in the downward posture to the upper pickup guide body (22). The upper pickup guide body (22) and the turn carriage (40) are moved. The pickup table (21) can be moved between them.

When the pickup base (21) of the upper pickup guide body (22) is moved to the lower pickup (23), the turn carriage (40) is oriented downward.
The pick-up base (21) is received in the above, the drive gear (54) is rotated in the clockwise direction opposite to the above, the turn carriage (40) in the downward position is lowered, and then it is rotated about 180 degrees in the clockwise direction to turn the turn carriage (40) is supported upward, the turn carriage (40) is further lowered to return to the state of FIG. 7, and the pickup base (21) of the turn carriage (40) is moved to the lower pickup guide body (23). .

In FIG. 1, the spherical guide bodies (45) and (46) and the bearing body (51) are integrally formed by a synthetic resin molding process, but it is possible to easily form each of them individually and to lock them. Although the arm (50) is formed of a resin molded product, it can be easily formed by sheet metal working.

[0020]

As is apparent from the above embodiments, the present invention fixes the pickup (19) in a disc player having a turn carriage (40) for moving the pickup (19) to both sides of the disc (7) (8). A turn carriage (40) for supporting a lock arm (50).
The turn base (41) is attached to the turn base (41) and the lock arm (50) is disengaged (5).
2) (53) is provided, and the lock arm (50) is brought into contact with and supported by the turn base (41) so that the lock arm (50) is kept engaged with the pickup (19). Since the operation load of the lock arm (50) is made smaller than before by eliminating the elastic force of the spring or the like as in the conventional case, the movement of the turn carriage (40) or the operation of the lock arm (50) can be stably performed. It is possible to reduce the driving force of the turn carriage (40) and turn carriage (4
0) The structure can be easily simplified.

[Brief description of drawings]

FIG. 1 is a partial side view of a turn carriage.

FIG. 2 is an overall plan view.

FIG. 3 is a side view of a pickup mounting portion.

FIG. 4 is a plan view of the same.

FIG. 5 is a front view of the same section.

FIG. 6 is a partial side view.

FIG. 7 is a front view of a turn carriage mounting portion.

FIG. 8 is an operation explanatory view of a lock arm.

[Explanation of symbols]

 (7) (8) Disc (19) Pickup (40) Turn carriage (41) Back plate (turn base) (50) Lock arm (52) (53) Horizontal projecting surface (disengagement body)

Claims (1)

(57) [Claims] 1. A disc player having a turn carriage for moving a pickup to both sides of the disc, wherein a lock arm for fixedly supporting the pickup is attached to the turn carriage, and a disengagement body for the lock arm is provided on a turn base for providing the turn carriage. A disc player characterized in that a lock arm is brought into contact with and supported by a turn base so that the lock arm is kept engaged with a pickup.