JP3030288B1 - Disk recording or reproducing apparatus and method of assembling the apparatus - Google Patents

Abstract

Abstract: PROBLEM TO BE SOLVED: To improve operability of position adjustment for overlapping a recording head and a lens center. SOLUTION: A lens 2 that emits a beam on a chassis 1
And a head lever provided with a recording head 70 at the tip so that it can move up and down with respect to the disc.
7, a guide shaft 11 arranged between the pickup 2 and the chassis 1 for guiding the movement of the pickup 2, and a screw shaft 40 for moving the pickup 2, the head lever 7 is arranged along the moving direction of the pickup 2. It is mounted so that it can be fine-tuned. With the head lever 7 opened, the chassis 1 is inserted between the pickup 2 and the pickup 2, and the guide shaft 11 is fixed when the pickup 2 fitted with the guide shaft 11 is mounted on the chassis 1. A stopper 14 is provided. With the pickup 2 mounted on one surface of the chassis 1, the guide shaft 11 is fixed to the chassis 1, and the screw shaft 40
And pickup 2 are linked.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk recording or reproducing apparatus, and more particularly to an apparatus for adjusting a position of a recording head and a lens center of a pickup so as to overlap each other, and a method of assembling the apparatus.

[0002]

2. Description of the Related Art Conventionally, there has been proposed an apparatus for performing recording or reproduction using a cartridge (60) containing a disk (6). FIG. 8 is a perspective view of a mechanism deck of such a disk recording or reproducing apparatus. A turntable (5) for rotating a disk and a pickup (2) are provided in an opening (10) opened in the chassis (1), and the turntable (5) projects above the chassis (1). I have. The pickup (2) is supported on the turntable (5) by a guide shaft (11) suspended from the opening (10) so as to be able to approach and separate therefrom. A lens (20) for emitting a beam is provided on the upper surface of the pickup (2). A head lever (7) is attached to the pickup (2) via a support piece (71). The head lever (7) has a base end pivotally supported by the support piece (71), is located above the pickup (2), and has a recording head (70) facing the lens (20) on the back surface of the tip. I have. The cartridge (60) mounted on the support projections (12) (12) protruding from the chassis (1) is provided with a shutter (61) for switching between exposure and closing of the disc (6). In the opened state, as shown in FIG. 9, the head lever (7) rotates downward, and the recording head (70) comes into contact with the disk (6) to perform recording. During playback, the recording head (70) is
Separate from (6).

The disk (6) is magnetically recorded, and emits a beam from the lens (20) of the pickup (2) during reproduction. Disk (6) by well-known Faraday-Car effect
Reflected on the back surface of the disk (6), the rotation direction of the polarization plane differs depending on the direction of magnetization on the disk (6), that is, the S pole and the N pole. Therefore, 0 and 1 levels are determined based on the rotation direction. At the time of recording, a beam is emitted from the lens (20) of the pickup (2), and a signal from the recording head (70) is transmitted from the recording head (70) while heating a minute portion on the disk (6) to the Curie temperature at which the holding force becomes zero. Supply to the upper surface. The minute portion is instantaneously magnetized, but the rotation of the disk (6) causes the irradiation of the beam to go out of the minute portion, so that the minute portion is cooled while being magnetized, and the direction of magnetization is fixed. Therefore, the recording head (70)
If the lens (20) of the pickup (2) is displaced in the horizontal plane, the signal cannot be accurately recorded. Therefore, as shown in FIG. 7 (a), the gap between the recording head (70) and the pickup
The center of the lens (20) in (2) needs to overlap exactly with the disk (6) in between.

[0004]

In the conventional head lever (7) shown in FIG. 7 (a), only the head lever (7) cannot be moved along the moving direction of the pickup (2). Due to the assembly error when attaching (7) to the support piece (71), the gap between the recording head (70) and the lens
(20) The center may shift. In view of this, FIG.
The mechanism shown in (b) has been proposed. The head lever (7) has a base end attached to a pivot (72) penetrating the support piece (71), and a distal end of the pivot (72) is screwed to the support piece (71). A head lever is provided between the support piece (71) and the head lever (7).
A compression spring (73) for urging the (7) in one direction to the left and right is a pivot (72).
It is stuck in. When the head of the pivot (72) is rotated, the head lever (7) moves. Thereby, the recording head (70)
And the center of the lens (20) of the pickup (2) can be adjusted. This position adjustment is performed by the chassis (1)
The pickup (2) and the head lever (7) were attached to the mechanism deck, and the mechanism deck had been assembled. However, in the adjustment in the completed state, the chassis (1)
And circuit components (not shown) attached to the chassis (1) may interfere with the operation. In view of this point, the applicant adjusted the position with the head lever (7) attached to the pickup (2), and then
The idea was to attach (2) and the head lever (7) to the chassis (1). SUMMARY OF THE INVENTION It is an object of the present invention to improve the workability of adjusting the position where the lens center is overlapped with the recording head.

[0005]

The disk recording or reproducing apparatus comprises a pickup (2) having a lens (20) for emitting a beam on a signal recording surface of a disk, and a chassis (1). It is located on the opposite side of the pickup (2),
A head lever (7) having a recording head (70) at the tip thereof and rotatably provided in a plane perpendicular to the moving direction of the pickup (2) and perpendicular to the chassis (1); Guide shaft (11) that guides the movement of the pickup (2) through the
And a drive mechanism for moving the pickup (2) in connection with the pickup (2), and the head lever (7) can be finely adjusted with respect to the pickup (2) along the moving direction of the pickup (2). Attached to. When assembling the chassis (1) and the pickup (2), the head lever (7) is finely adjusted along the moving direction of the pickup (2) with the head lever (7) attached to the pickup (2). With the guide shaft (11) attached to the adjusted pickup (2), open the head lever (7), mount the pickup (2) on one surface of the chassis (1), and sandwich the chassis (1). Then, a head lever (7) is arranged on the side opposite to the pickup (2), and after the mounting, the guide shaft (11) is fixed to the chassis (1).
The pickup (2) is connected to the drive mechanism.

[0006]

In the device according to the present invention, with the head lever (7) attached to the pickup (2),
The head lever (7) is finely adjusted along the moving direction of the pickup (2), and after the adjustment is completed, the pickup (2) and the head lever (7) are attached to the chassis (1). That is, the chassis (1) and the circuit components attached to the chassis (1) are not in the way and work is easier than when the position adjustment is performed after the mechanism deck is assembled.

[0007]

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 reference numerals are used for the same configuration as the conventional one. FIG. 1 is an exploded perspective view of a disk recording or reproducing apparatus. As described above, the disk (6) is inserted into the cartridge (60).
The cartridge (60) is provided with a shutter (61) on the cartridge (60) for switching between exposure and closing of the disk.
Recording or reproduction can be performed with the shutter (61) opened and the disk exposed. A turntable (5) for rotating a disk and a pickup (2) having a lens (20) for emitting a beam on a signal recording surface of the disk are provided in an opening (10) of the chassis (1). A pickup (2) is fitted on a guide shaft (11) mounted on the turntable (5) so as to be able to approach and separate from the turntable (5).

A head lever (7) is attached to the pickup (2) via a support piece (71).
A recording head (70) is provided on the back surface of the tip of (7). The head lever (7) has its base end pivoted through the support piece (71).
2), and is provided rotatably in a plane perpendicular to the moving direction of the pickup 2 and perpendicular to the chassis 1. The head lever (7) consists of a support piece (71) and a head lever.
The pickup (2) is urged in the moving direction of the pickup (2) by a compression spring (73) provided between the pickup (2). From the lower end of the support piece (71), a horizontal plate (71a) projects toward the chassis (1), and the horizontal plate (71a) is attached to the lower surface of the pickup (2). With the shutter (61) of the cartridge (60) open, the head lever (7) is pivoted down about the pivot (72) by an elevating mechanism (not shown), and the recording head (70) is moved to the disk ( When touching (6), recording on the disc (6) is possible.
In FIG. 1, for convenience of explanation, a pickup (2)
The head lever (7) and the head lever (7) are shown in an exploded manner. As will be described later, the pickup (2) and the head lever (7) are mounted on the chassis (1) in an assembled state.

FIG. 2 is a rear view of the chassis (1), and FIG.
2 is a left side view when FIG. 2 is viewed from the A direction, and FIG. 4 is an upper side view when FIG. 2 is viewed from the B direction. FIG. 6 is a left side view of FIG. 2 viewed from the direction C. On the back of the chassis (1), a bracket (3) whose longitudinal direction is parallel to the guide shaft (11) is screwed.
(32) (32) Stopped, the motor on the side of the bracket (3)
(M1) is attached. At both ends of a notch (30) formed on one side of the bracket (3), a screw shaft (40) extending in the moving direction of the pickup (2) is installed.
Is driven to rotate by a motor (M1). pick up
(2) A through hole (21) is formed at one end overlapping with the screw shaft (40), and a base end is picked up in the through hole (21).
Is provided with a plate-shaped spring piece (22). As shown in FIG. 3, the spring piece (22) has its free end inclined downward,
A protrusion (25) protrudes from the lower surface, and the protrusion (25) fits into a root of the screw shaft (40). As a result, the spring piece (22) is connected to the screw shaft (40).
When the screw shaft (40) rotates, the pickup (2)
Moves. Further, the pickup (2) can be attached from below the screw shaft (40). On the pickup (2), screw holes (23) and (23) are opened inside and outside the through hole (21), and the support pieces (71) are horizontally inserted into the screw holes (23) and (23). Board (71a)
Is screwed and covers the through hole (21).

The guide shaft (11) is located at a position closer to the lens (20) than the through hole (21) on the side surface of the pickup (2).
As shown in FIG. 6, both ends of the guide shaft (11) are fitted with stop screws (32) (3) of the bracket (3).
2) Head and stopper (1) cut and raised from chassis (1)
4) It is fixed to the chassis (1) sandwiched between (14). As shown in FIG. 4, a concave groove (24) is formed on the side surface of the other end of the pickup (2), and the guide shaft (1) is formed on the chassis (1).
It is slidably engaged with a guide rod (56) provided in parallel with 1).

(Assembly of Head Lever) In the device according to the present embodiment, a pickup (2) fitted with a guide shaft (11) is attached from the rear side of the chassis (1) and fitted to a screw shaft (40). Can be done. In view of this, the applicant, with the head lever (7) attached to the pickup (2),
It was conceived that the position was adjusted and the adjusted pickup (2) was mounted on the chassis (1). First pick up
Insert the head lever (7) into the screw holes (23) (23) (see FIG. 2) of (2).
Screw the support piece (71) with
(2) Assemble the head lever (7).

As shown in FIG. 7 (b), the positions of the pickup (2) and the head lever (7) are adjusted by pressing both sides of the pickup (2) with jigs (29) and (29). A state in which the pickup (2) and the head lever (7) are overlapped is photographed from directly above by a camera (not shown) and displayed on a monitor (not shown). The jigs (29) and (29) have sensors (SE) and (SE) built-in,
9) A reference line L passing through the center of the lens 20 of the pickup 2 is obtained from the interval between 29. The jigs (29) and (29) are connected to a monitor, and the reference line L is displayed on the monitor. On the head lever (7), just above the center of the gap of the recording head (70), a K point indicating this is displayed. pivot
By rotating (72), the head lever (7) is moved right and left, and the point K and the reference line L overlap. The gap of the recording head (70) and the lens center of the pickup (2) overlap,
Accurate recording to (6) is possible. After the position adjustment is completed, an adhesive called a screw lock agent may be applied between the head of the pivot (72) and the head lever (7) so that the pivot (72) does not rotate carelessly. .

FIG. 5 shows a pickup (2) with a chassis (1).
It is a perspective view which shows the process of attaching to a. After the position adjustment, the pickup (2), the head lever (7), and the chassis (1) are turned upside down. The head lever (7) is rotated about the pivot (72) in the opening direction with respect to the pickup (2), and the chassis (1) is inserted between the head lever (7) and the pickup (2). A bracket (3) is temporarily fixed on the chassis (1). Insert the groove (24) of the pickup (2) into the chassis (1).
Fit the upper guide rod (56), then push the guide shaft (11)
The stopper (14) is placed on the screw shaft (40) side of (14), and the guide shaft (11) is brought into contact with the stopper (14). Spring piece (22) of pickup (2)
The free end of (see Fig. 2) is pressed against the screw shaft (40),
The projection (25) of (22) fits on the screw shaft (40).

Thereafter, the screws (32) and (32) are screwed into the chassis (1). As shown in FIGS. 2 and 6, the guide shaft (11) is sandwiched between the head of the screw (32) and the stopper (14) and is fixed to the chassis (1). Pickup (2) is a guide shaft
(11) and can move along the guide rod (56).
The adjustment of overlapping the lens (20) of the pickup (2) with the recording head (70) of the head lever (7) is no longer necessary.

In this embodiment, the position is adjusted with the head lever (7) attached to the pickup (2), and then the pickup (2) and the head lever (7) are moved to the chassis.
Attach to (1). That is, the chassis (1) and the circuit components attached to the chassis (1) are not in the way and work is easier than when the position adjustment is performed after the mechanism deck is assembled.

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 an exploded perspective view of a disk recording or reproducing apparatus.

FIG. 2 is a rear view of the chassis.

FIG. 3 is a left side view of FIG. 2 as viewed from a direction A.

FIG. 4 is an upper side view of FIG. 2 viewed from a direction B.

FIG. 5 is a perspective view showing a step of mounting the pickup on a chassis.

FIG. 6 is a left side view of FIG. 2 viewed from a direction C.

7A is a plan view of a conventional head lever, and FIG. 7B is a plan view of a head lever according to the present invention.

FIG. 8 is a perspective view of a conventional disk recording or reproducing apparatus.

FIG. 9 is a side view when a disc is mounted on a conventional disc recording or reproducing apparatus.

[Explanation of symbols]

 (1) Chassis (2) Pickup (60) Cartridge

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-8-161787 (JP, A) JP-A-11-250516 (JP, A) JP-A-5-128615 (JP, A) (58) Field (Int.Cl. ⁷ , DB name) G11B 11/105

Claims (3)

(57) [Claims] 1. A pickup comprising a lens (20) on a chassis (1) for emitting a beam on a signal recording surface of a disk.
(2) is located on the opposite side of the pickup (2) with the chassis (1) interposed therebetween, and has a recording head (70) at its tip, and is perpendicular to the moving direction of the pickup (2) and perpendicular to the chassis (1). A head lever (7) provided rotatably in a flat surface, a guide shaft (11) penetrating the side surface of the pickup (2) and guiding the movement of the pickup (2), and a pickup lever (2). And a drive mechanism for moving the pickup (2) in a linked manner. The head lever (7) is attached to the pickup (2) so as to be finely adjustable along the moving direction of the pickup (2). In the reproducing apparatus, the head lever (7) is provided between the head lever (7) and the pickup (2) so as to be rotatable to an opening angle at which the chassis (1) can be inserted. When the pickup (2) fitted with the guide shaft (11) is mounted on And a positioning mechanism for fixing the guide shaft (11). The guide shaft (11) is fixed to the chassis (1) while the pickup (2) is mounted on the chassis (1). (2) A disc recording or reproducing apparatus characterized by being linked. 2. A pickup having a lens (20) on a chassis (1) for emitting a beam on a signal recording surface of a disk.
(2) is located on the opposite side of the pickup (2) with the chassis (1) interposed therebetween, and has a recording head (70) at its tip, and is perpendicular to the moving direction of the pickup (2) and perpendicular to the chassis (1). A head lever (7) provided rotatably in a flat surface, a guide shaft (11) penetrating the side surface of the pickup (2) and guiding the movement of the pickup (2), and a pickup lever (2). And a drive mechanism for moving the pickup (2) in a linked manner. The head lever (7) is attached to the pickup (2) so as to be finely adjustable along the moving direction of the pickup (2). A method of assembling a reproducing apparatus, comprising: finely adjusting a head lever (7) along a moving direction of a pickup (2) with a head lever (7) attached to the pickup (2); With the guide shaft (11) attached to (2), Open the over (7), pickup
(2) is mounted on one side of the chassis (1), and the head lever (7) is located on the opposite side of the pickup (2) across the chassis (1).
And a method of assembling a disk recording or reproducing apparatus in which the guide shaft (11) is fixed to the chassis (1) after the mounting, and the pickup (2) is connected to the drive mechanism. The drive mechanism is a screw shaft (40) connected to the motor (M1) provided on the chassis (1) and extending along the moving direction of the pickup (2). A projection (25) fitted into a root of the screw shaft (40).
3. The disc recording or reproducing apparatus according to claim 1.