JP3031264B2 - Light deck - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical deck used for a compact disk player, an optical disk device, and the like.

[0002]

2. Description of the Related Art The structure of a conventional optical deck will be described below with reference to the drawings.
A description will be given below .

FIGS. 3 and 4 are perspective views of a conventional optical deck. In FIG. 3, reference numeral 61 denotes a spindle motor fixed to a traverse base 62 for rotating an optical disk (not shown), and reference numeral 60 denotes a turntable for mounting the optical disk, which is integrated with the spindle motor 61.
51 is an optical pickup for extracting information from an optical disk,
Reference numeral 56 denotes a traverse motor for providing a driving force for moving the optical pickup 51, and 57 denotes a traverse motor 56.
Is a nut shaft that rotates by the driving force of the nut, 53 is a nut plate that engages with the lead shaft 57, and 54 is a nut plate 5
A nut plate pressing spring for preventing the member 3 from detaching from the lead shaft 57 is provided from above the nut plate 53. The nut plate 53 and the nut plate pressing spring 54 are integrated with the optical pickup 51 by screws 55.
Main shaft 58 and counter shaft 59 fixed to traverse base 62
Penetrates both ends of the optical pickup 51.

Next, a method for connecting the nut plate 53 and the optical pickup 51 for transmitting the driving force of the lead shaft 57 to the optical pickup 51 will be described with reference to FIG. First, the bosses 53a and 53b of the nut plate 53 are fitted into the holes 51a and 51b provided in the optical pickup 51, and the nut plate 5
Positioning 3 is performed. Similarly, the boss 53 of the nut plate 53
The holes 54a, 54 of the nut plate holding spring 54 are provided in d, 53e.
The positioning of the nut plate pressing spring 54 is also performed by fitting b. Next, respective holes 51c provided in the optical pickup 51, the nut plate 53, and the nut plate pressing spring 54,
The nut plate 53 and the nut plate pressing spring 54 are fixed to the optical pickup 51 by screwing the screws 55 through the screws 53c and 54c. The nut plate 53 is a lead shaft 57
Then, the driving force of the lead shaft 57 is transmitted to the optical pickup 51 by being pressed by the nut plate pressing spring 54. Here, the nut plate 53 is made of a hard resin which does not easily wear because it engages with the lead shaft 57 made of metal.

The operation of the conventional optical deck configured as described above will be described below.

[0006] The optical disk placed on the turntable 60 is rotated by a spindle motor 61. The optical pickup 51 for reading the signal of the optical disk by the nut plate 53 engaged with the lead shaft 57 that transmits the driving force of the traverse motor 56 moves to a predetermined position (inner and outer circumferences) of the optical disk. At that position, the optical pickup 51 reads the signal of the disk.

[0007]

However, in the optical deck as described above, the driving force from the traverse motor 56 is applied to the optical pickup 5 through the lead shaft 57.
1, the nut plate 53 must be engaged with the lead shaft 57 without skipping teeth, and a hard material has been required to prevent abrasion. However,
If a hard material is used for the nut plate 53, if the traverse motor 56 is rapidly accelerated and decelerated in order to move the optical pickup 51 to a predetermined position on the optical disk at a high speed, the vibration is transmitted to the optical pickup 51 intensely. However, there is a problem that the performance of the device is greatly impaired.

The present invention has been made in view of the above-mentioned problems, and when the optical pickup is moved at high speed, the vibration transmitted to the optical pickup is reduced while accurately transmitting the driving force from the traverse motor, so that an extremely stable light is obtained. It was made to provide a deck.

[0009]

In order to solve this problem, an optical deck according to the present invention comprises a spindle motor for rotating an optical disk, an optical pickup for reading information from the optical disk, and a drive for moving the optical pickup. A traverse motor that applies force, a lead shaft that rotates by the driving force of the traverse motor, a nut plate that engages with the lead shaft , a coupling member that connects the optical pickup and the nut plate and has a damping effect, and the nut Press the plate against the lead shaft
A nut plate pressing spring for connecting the
The optical pickup has flexibility in the feeding direction, and
The light pick-up is in contact with the nut plate holding spring.
It is configured to be slidable in the feeding direction of the pump .

[0010] This makes it possible to obtain a very stable optical deck that can accurately transmit the driving force from the traverse motor, reduce the vibration transmitted to the optical pickup, and do not impair the performance of the optical pickup.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention according to claim 1 of the present invention provides a spindle motor for rotating an optical disk, an optical pickup for reading information from the optical disk, and a traverse for providing a driving force for moving the optical pickup. A motor, a lead shaft rotated by a driving force of the traverse motor, a nut plate engaged with the lead shaft , a coupling member having a damping effect for connecting the optical pickup and the nut plate, and the nut
Nut plate press for pressing the plate against the lead shaft
The optical pickup is provided with a spring.
The nut plate has flexibility in the feeding direction, and the nut plate is
Sliding in the feed direction of the optical pickup with respect to the holding spring
It is a light deck characterized by being configured as possible, while having a damping effect of the connecting member,
Hold the nut plate so that it does not come off the lead shaft.
It has the effect that it can be removed .

According to a second aspect of the present invention, in the optical deck according to the first aspect, the connecting member is made of a rubber member, and it is inexpensive and a damping effect can be obtained very easily. Has an action.

According to a third aspect of the present invention, in the optical deck according to the first aspect, the connecting member is made of an elastomer, and a stable damping effect can be obtained in a wide temperature range. Has an action.

According to a fourth aspect of the present invention, a nut plate is provided.
At least one step portion is provided on the connecting member.
The nut plate is fitted in
And the connecting member is fixed to the optical pickup.
The boss provided on the nut plate when bent in the
Contact the hole provided in the nut plate holding spring.
More is obtained by the optical deck according to claim 1, wherein the can regulate the amount of deflection of the connecting member, easily
And the nut plate can be pressed down while regulating the position so that the nut plate does not come off the lead shaft.

[0015]

An embodiment of the present invention will be described below with reference to FIGS. (Embodiment 1) FIG. 1 is a perspective view of an optical deck according to an embodiment of the present invention.

In FIG. 1, reference numeral 11 denotes a traverse base 1
A spindle motor 10 fixed to 2 for rotating an optical disk (not shown) is a turntable 10 on which the optical disk is mounted, and is integrated with the spindle motor 11. 1
Is an optical pickup for extracting information from the optical disk, 6 is a traverse motor that provides a driving force for moving the optical pickup 1, 7 is a lead shaft that is rotated by the driving force of the traverse motor 6, and 3 is engaged with the lead shaft 7. A nut plate made of hard resin to accurately transmit the driving force and to prevent wear. A connecting member 2 connects the optical pickup 1 and the nut plate 3 and is made of a soft material so that the optical pickup 1 bends in the moving direction when the optical pickup 1 moves. As a material of the connecting member 2, a rubber member which is inexpensive and has a very damping effect at room temperature, or an elastomer member which has a stable damping effect even in a high temperature range is used. Reference numeral 4 denotes a nut plate pressing spring provided on the nut plate 3 to prevent the nut plate 3 from coming off the lead shaft 7. The connecting member 2, the nut plate 3, and the nut plate pressing spring 4 are integrated with the optical pickup 1 by screws 5. A main shaft 8 and a sub shaft 9 fixed to the traverse base 12 penetrate both ends of the optical pickup 1.

Next, a detailed configuration of the optical deck according to the present embodiment will be described with reference to FIG. In FIG. 2, reference numerals 1a and 1b denote holes provided in the optical pickup 1 and engaged with the bosses 2a and 2b of the connecting member 2, and the diameter thereof is slightly larger than the diameters of the bosses 2a and 2b. 1c is provided in the optical pickup 1 and provided with a screw groove therein, and holes for screwing with the screw 5 are provided in the connecting member 2, and bosses provided in the connecting member 2 for engaging with the holes 1a and 1b are connected. It is a hole provided in the member 2 and through which the screw 5 penetrates, and no screw groove is provided therein. 2d and 2e are provided in the connecting member 2 and the holes 4a and 4
The boss attached to b, 2f is a hole in which the step 3c of the nut plate 3 is fitted, 4c is a hole through which the screw 5 penetrates, and no screw groove is provided therein. The screw 5 penetrates through the respective holes 2c and 4c provided in the connecting member 2 and the nut plate pressing spring 4, and is screwed into the hole 1c of the optical pickup 1, so that the connecting member 2 and the nut plate pressing spring 4 Can be mounted on the optical pickup 1 and the nut plate 3 can be pressed against the lead shaft 7. At this time, the nut plate pressing spring 4 is pressed by the step 3c of the nut plate 3 almost without contacting the connecting member 2. For this reason,
The nut plate 3 is engaged with the lead shaft 7 without impairing the damping effect of the connecting member 2 made of a soft material,
Separation can be prevented. Reference numerals 4 d and 4 e denote elongated holes provided in the nut plate pressing spring 4, and the elongated holes are elongated in the moving direction of the optical pickup 1. The holes 4d and 4e are provided inside the boss 3a.
And 3b are movable in the long hole direction. When the optical pickup 1 is not moving, the bosses 3a and 3b are located substantially at the centers of the holes 4d and 4e. When the optical pickup 1 is moved, the connecting member 2 is connected to the optical pickup 1.
The holes 4d and 4e
The boss portions 3a and 3b located inside abut on the ends of the holes 4d and 4e in the long hole direction to restrict the amount of deflection of the connecting member 2.

A method for positioning each member will be described based on the configuration shown in FIG. Positioning of the connecting member 2 with respect to the optical pickup 1 is performed by engaging bosses 2a and 2b of the connecting member 2 with holes 1a and 1b provided in the optical pickup 1. At this time, there is a slight gap between the bosses 2a and 2b and the holes 1a and 1b, and the connecting member 2 is slightly movable in the moving direction of the optical pickup 1. The positioning between the nut plate pressing spring 4 and the connecting member 2 is performed by fitting the holes 4a and 4b of the nut plate pressing spring 4 into the bosses 2d and 2e of the connecting member 2. The positioning of the nut plate 3 and the connecting member 2 is performed by fitting the step 3c of the nut plate 3 with the hole 2f of the connecting member 2.

The operation of the optical deck according to the present embodiment configured as described above will be described below.

The optical disk placed on the turntable 10 is rotated by a spindle motor 11. When the optical pickup 1 is moved, the nut plate 3 engaged with the lead shaft 7 is moved in the long side direction of the lead shaft 7 when the traverse motor 6 rotates the lead shaft 7. At that position, the optical pickup 1 reads the signal of the optical disk.

As described above, according to the present embodiment, the hard resin nut plate 3 for engaging with the lead shaft 7 is provided.
And the soft resin connecting member 2 for connecting the nut plate 3 and the optical pickup 1, so that the traverse motor 6 rapidly accelerates and decelerates while accurately transmitting the driving force from the lead shaft 7 to the optical pickup 1. In this case, the vibration transmitted to the optical pickup 1 can be suppressed by the damping effect of the connecting member.

As described above, according to the present invention, a conventional nut plate made of a hard resin is replaced with a hard resin nut plate for engaging with a lead shaft, and a soft resin connecting the nut plate and the optical pickup. Divided into two members,
Nut to hold the nut plate on the lead shaft.
Plate holding spring, and the connecting member
It has flexibility in the retraction direction (axial direction of the lead shaft).
With this configuration, the traverse motor is rapidly accelerated and decelerated , and even if the optical pickup is moved at high speed,
Axial vibration of the lead shaft transmitted from the lead shaft
And an optical deck having stable performance can be provided. When a rubber member is used as the connecting member, a very damping effect is exhibited at room temperature, and when an elastomer member is used, a stable damping effect can be provided over a wide temperature range.

Further, the nut-plate presser springs, it is possible to press the nut plate without substantially contacting the connecting member, without reducing the damping effect of the connecting member, engaging the nut plate to the lead shaft, nut
Boss provided on the nut plate holding spring
The separation can be prevented by contacting the hole .

[Brief description of the drawings]

FIG. 1 is a perspective view showing a configuration of an optical deck according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view showing a configuration of an optical deck according to one embodiment of the present invention.

FIG. 3 is a perspective view showing a configuration of a conventional optical deck.

FIG. 4 is an exploded perspective view showing a configuration of a conventional optical deck.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Optical pickup 2 Connecting member 3 Nut plate 4 Nut plate pressing spring 5 Screw 6 Traverse motor 7 Lead shaft 8 Main shaft 9 Sub shaft 10 Turntable 11 Spindle motor 12 Traverse base

Continuing from the front page (72) Inventor Daisaburo Kubota 1006 Kazuma Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (56) References JP-A 7-129970 (JP, A) , U) Hikaru Hei 3-102163 (JP, U) (58) Fields surveyed (Int. Cl. ⁷ , DB name) G11B 7/085 G11B 21/02 611

Claims (4)

(57) [Claims] A spindle motor for rotating an optical disk; an optical pickup for reading information from the optical disk; a traverse motor for providing a driving force for moving the optical pickup; and a lead shaft for rotating by the driving force of the traverse motor. And a nut plate that engages with the lead shaft , a connection member that has a damping effect that connects the optical pickup and the nut plate ,
For pressing the nut plate against the lead shaft
A nut plate holding spring, wherein the connecting member is provided with the optical pickup;
The nut plate is flexible in the feeding direction of the
Feed of the optical pickup to the nut plate holding spring
An optical deck characterized by being slidable in any direction . 2. The optical deck according to claim 1, wherein the connecting member is made of a rubber member. 3. The optical deck according to claim 1, wherein the connecting member is made of an elastomer. 4. It is provided at at least one position on a nut plate.
The stepped portion fits into the hole provided in the connecting member.
The nut plate is fixed to the connecting member,
When the member bends in the feed direction of the optical pickup,
The boss provided on the nut plate is provided on the nut plate holding spring.
The connecting member is brought into contact with the
The optical deck according to claim 1 , wherein the amount can be regulated .