JPH1166770A - Disk reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To soften impact at the time of collision of a pickup arriving in an inner/outer circumference of a disk against parts on a chassis without increasing the number of constitutive parts. SOLUTION: In the disk reproducing device, the pickup 2 is slid along a guide shaft 6 extending in the radial direction of the disk on the chassis 1. A bracket 3 for abutting against the pickup 2 and stopping this pickup 2 is erected at the finishing end of a sliding path of the pickup 2 on the chassis 1. The bracket 3 is equipped with an abutting piece 30 for absorbing impact at the time of colliding with the pickup 2 and a holding piece 31 for holding the end part of the guide shaft 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a disk reproducing apparatus for reproducing a disk by moving a pickup in a radial direction of a rotating disk.

[0002]

2. Description of the Related Art FIG. 9 is a plan view of a conventional disk reproducing apparatus. A turntable (4) for rotating the disk D is provided at one end inside the opening (10) opened on the chassis (1).
Is provided. In the opening (10) on the side of the turntable (4), a pickup (2) for emitting a beam toward the back surface of the disc is provided movably in the radial direction of the disc. The pickup (2) has guide shafts (6) at both ends.
(6), and both ends of each guide shaft (6) are supported by brackets (3) and (3) mounted on the chassis (1) at the transition path end of the pickup (2). pick up
On the side of (2), a rack piece with the tooth surface (21) formed outwards
(20) is provided, and a chassis is provided beside the rack piece (20).
On the back side of (1), a motor (M1) is provided. Tooth surface
The gear (21) meshes with the gear (50) on the downstream side of the gear train (5) associated with the motor (M1), and the pickup (2) slides in cooperation with the rotation of the motor (M1). The pickup (2) slides between the inner circumference and the outer circumference of the disk D, and when the pickup (2) reaches the inner circumference or the outer circumference, the rack piece (20) is mounted on the bracket.
The pickup (2) comes into contact with (3) and stops sliding (see FIG. 10). Since the pickup (2) cannot slide any more, a high load is applied to the motor (M1), and when a high load is detected for a predetermined time or more, the motor (M1) stops.

[0003]

When the disk is a disk on which music information is recorded, the access time to the recorded information is long, so that the pickup (2) reaches the inner and outer circumferences of the disk and the rack piece (20) is mounted on the bracket. Even when it comes into contact with (3), the impact force applied to the bracket (3) is weak. Therefore, the bracket
(3) There is no fear of damage or the like. However, in recent years, CD-ROMs and DVDs (digital video discs) on which character information and image information are recorded have been proposed. Since these discs need to be accessed at high speed, that is, to quickly detect desired information, the sliding speed of the pickup (2) needs to be faster than that of a disc on which music information is recorded. Therefore,
The impact when the rack piece (20) collides with the bracket (3) is large, and the bracket (3) may be damaged. In this case, if a cushioning member such as rubber is provided on the bracket (3), the number of components increases. SUMMARY OF THE INVENTION It is an object of the present invention to mitigate an impact when a pickup reaching the inner and outer circumferences of a disk collides with a component on a chassis without increasing the number of components.

[0004]

A disk reproducing apparatus comprises a pickup (2) for emitting a beam toward a disk along a guide shaft (6) extending parallel to a radial direction of the disk on a chassis (1). To contact the pickup (2) at the end of the slideway of the pickup (2).
A bracket (3) for stopping (2) is provided. The bracket (3) comes into contact with the pickup (2) to absorb a shock at the time of collision with the pickup (2), and a holding piece (30) for holding an end of the guide shaft (6). 31).

[0005]

When the pickup (2) reaches the end of the slideway, it comes into contact with the contact piece (30) of the bracket (3) having elasticity. Therefore, the impact when the pickup (2) collides is reduced, and damage to the bracket (3) and the mechanism for driving the pickup (2) can be prevented. In particular, when the pickup (2) is slid at a high speed at the time of access, the effect is great in a CD-ROM or the like where the impact on the bracket (3) is large. Further, the bracket (3) supports the guide shaft (6) with the holding piece (31). Since the component supporting the guide shaft (6) is an essential component for the disc reproducing apparatus, the present invention eliminates the need to provide a new component for reducing the impact at the time of collision of the rack piece (20). Thus, an increase in the number of components can be prevented.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an example of the present invention will be described in detail with reference to the drawings. The same components as those of the related art are denoted by the same reference numerals, and detailed description thereof is omitted. FIG. 1 is a plan view of a disk reproducing apparatus according to the present embodiment, FIG. 2 is a view of FIG. 1 viewed from an A direction, and FIG. 3 is a view of FIG. 1 viewed from a B direction. As in the prior art, an opening (10) is opened in a chassis (1) made of sheet metal, and a turntable (4) for rotating a disk D is located in the opening (10). On the side of the turntable (4), a pickup that emits a beam toward the back of the disk
(2) is provided, and the pickup (2) slides with both ends fitted on guide shafts (6) (6) extending in the disk radial direction. As shown in FIG. 2, both ends of the left guide shaft (6) are connected to a holding piece (3) of a bracket (3) erected on the chassis (1).
Supported by 1). The right guide shaft (6) is placed on the edge of the opening (10) and is pressed down by the inclined surface of the head (70) of the flat head screw (7) screwed to the chassis (1) as shown in FIG. Thus, misalignment is prevented.

A rack piece (20) having a tooth surface (21) formed outward is provided on the side of the pickup (2).
A motor (M1) is provided on the rear surface of the chassis (1) on the side of (20) (see FIG. 4). The rack piece (20) is the motor
It meshes with the gear (50) at the downstream end of the gear train (5) associated with (M1), and slides in conjunction with the rotation of the motor (M1). The pickup (2) slides between the inner and outer circumferences of the disk, and when the pickup (2) reaches the inner or outer circumference, the rack piece (2)
0) contacts the bracket (3), and the pickup (2) stops sliding.

The disc reproducing apparatus according to this embodiment is characterized by the shape of the bracket (3). FIG. 5 is a perspective view of the bracket (3). The bracket (3) is formed by bending an elastic plate material, and a hole (33) into which a mounting screw or a crimping projection is fitted.
(33) is opened and a mounting piece (32) that is positioned and fixed on the chassis (1); and an end face of the rack piece (20) of the pickup (2) that stands upright from one end of the mounting piece (32). Contact piece in contact with (30)
And extend obliquely upward from the side of the mounting piece (32),
A holding piece (31) for urging (6) downward is integrally provided. Both brackets (3) and (3) are installed with the contact pieces (30) facing in the same direction. As shown in FIGS. 2 and 5, a receiving piece (12) contacting the lower end of the guide shaft (6) from the chassis (1).
A rib (11) in contact with the side end of the guide shaft (6) protrudes, and the guide shaft (6) is supported by being pressed and sandwiched between the receiving piece (12), the rib (11) and the holding piece (31). The receiving piece (12) and the rib (11) are often formed by drawing or bending of the chassis (1). With this configuration, it is not necessary to provide a new member to support the guide shaft (6). Absent.

When the pickup (2) reaches the inner circumference of the disk, the rack piece (20) is moved outwardly from the contact piece (30) of the bracket (3) as shown in FIG. Collide with When the pickup (2) reaches the outer periphery of the disk, the rack piece (20) is brought into contact with the bracket (3) as shown in FIG. 6 (b).
It collides with the inward face of (30). In any case, the rack pieces
Since (20) is in contact with the contact piece (30) of the bracket (3) having elasticity, the impact at the time of collision is reduced, and the gear train (5) for driving the bracket (3) and the pickup (2) is damaged. Can be prevented. High speed pickup especially when accessing
Slide CD (2), CD with large impact on bracket (3)
-Great effect in ROM and the like. After the collision between the pickup (2) and the bracket (3), the motor (M1) stops as in the prior art. The bracket (3) is a holding piece.
The guide shaft (6) is supported by (31). Guide shaft
Since the component supporting (6) is an essential configuration for the disc player, in the device according to the present example, it is necessary to provide a new component for reducing the impact at the time of collision of the rack piece (20). Absent.

Also, a bracket (3) of the pickup (2)
FIG. 7 shows a possible configuration for alleviating the impact at the time of collision. This is achieved by opening a through hole (22) extending perpendicular to the longitudinal direction of the rack piece (20) at the tip of the rack piece (20), and connecting the tip of the rack piece (20) with the through hole (22). In between, a thin spring piece (23) is formed. The bracket (3) is provided by cutting and raising the chassis (1) and bending the same. Pickup (2)
When the disk reaches the inner or outer circumference of the disc,
The spring piece (23) of (0) collides with the bracket (3). Spring piece
(23) absorbs the impact of the collision, and the rack piece (20) and the gear train
Prevent the damage of (5). In the configuration of FIG. 7, the guide shaft
(6) is not supported by the bracket (3) but is supported by another member. However, the bracket (3) is formed by cutting and raising the chassis (1). I can not connect it. In addition, one end of the through hole (22) may extend to the side surface of the rack piece (20), as shown by a dashed line. Furthermore,
Instead of forming a spring piece (23) at the end of the rack piece (20),
The rack piece (20) may be made of an elastomeric material having elasticity, or the spring piece (23) is attached to the bracket (3), and the spring piece (23) and the rack piece (20) are contacted. You may make contact. Also, as shown in FIG. 8, the chassis (1) is subjected to outsert molding of a resin, so that
(3) and the bearing (60) of the guide shaft (6) may be provided integrally.

The description of the above embodiments is for the purpose of illustrating the present invention, and should not be construed as limiting the invention described in the appended claims or reducing the scope thereof. Further, the configuration of each part of the present invention is not limited to the above-described embodiment, and it is needless to say that various modifications can be made within the technical scope described in the claims.

[Brief description of the drawings]

FIG. 1 is a plan view of a disc reproducing apparatus.

FIG. 2 is a diagram of FIG. 1 viewed from an A direction.

FIG. 3 is a diagram of FIG. 1 viewed from a direction B.

FIG. 4 is a view of FIG. 1 viewed from a direction C.

FIG. 5 is a perspective view of a bracket.

FIG. 6A is a side view showing a state where a pickup reaching the inner periphery of the disk and a bracket are in contact, and FIG. 6B is a side view showing a state where the pickup reaching the outer periphery of the disk is in contact with the bracket. .

FIG. 7 is a perspective view of a bracket and a rack piece according to another embodiment.

FIG. 8 is a perspective view of a bracket and a guide shaft according to another embodiment.

FIG. 9 is a plan view of a conventional disk reproducing apparatus.

FIG. 10 is a perspective view of a bracket of the disc reproducing apparatus of FIG. 9;

[Explanation of symbols]

 (1) Chassis (2) Pickup (3) Bracket (6) Guide shaft (23) Spring piece (30) Contact piece (31) Holding piece

Claims (2)

[Claims] 1. A pickup (2) for emitting a beam toward a disk is slid along a guide shaft (6) extending in parallel with a radial direction of the disk on a chassis (1). In a disc reproducing apparatus provided with a bracket (3) that comes into contact with the pickup (2) and stops the pickup (2) at the end of the slideway, the bracket (3) contacts the pickup (2). A contact piece (30) that contacts and absorbs a shock at the time of collision with the pickup (2);
A disc reproducing device comprising a holding piece (31) for holding an end of a guide shaft (6). 2. A pickup (2) for emitting a beam to a disk is slid along a guide shaft (6) extending in a radial direction of the disk on a chassis (1), and a slide path of the pickup (2) is provided. In a disc reproducing apparatus provided with a bracket (3) for stopping the pickup (2) by contacting the pickup (2) at the end, at least one of the pickup (2) and the bracket (3) has a counterpart. A disk reproducing device, wherein a spring piece (23) is integrally formed at a portion abutting on the side.