JP2007048375A - Disk drive - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prepare a dust processing function with an inexpensive structure. <P>SOLUTION: In a disk drive in which an optical pickup and a spindle motor 10 are arranged in a case 1 made of synthetic resin, and a turntable is fitted to an upper end section of a rotation axis 11 prolonged upward from the spindle motor 10 and which performs high-speed rotation of the disk set on the turntable by the spindle motor 10 and reads the information being recorded on the disk by the above optical pickup, a lower end section 11b of the rotation axis 11 is extended downward from the spindle motor 10, and a cleaning brush 15 is attached to the lower end section 11b of this rotation axis 11 through a fixture 16. The turntable is rotated at high-speed through the rotation axis 11 by spindle motor 10 and at the same time the brush 15 is carried out high-speed rotation, and on the top of a bottom face 1A of a bottom chassis 1a is cleaned with the brush 15 rotating at high-speed. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

The present invention relates to a disk device such as a DVD player, for example, and has a dust disposal function with a particularly inexpensive structure.

Conventionally, an example of a DVD player is shown in FIGS. This has a rectangular box-shaped casing 1 composed of a bottom chassis 1a, a top chassis 1b, and a front panel 1c, and a disk D mounting tray 3 is placed on the main chassis 2 in the casing 1 on the front panel 1c.
The drive chassis 5 disposed below the tray 3 is disposed in the main chassis 2 so as to be movable up and down c and d via the pivot shaft 6. A cam shaft 7 projecting from the front surface of the drive chassis 5 is fitted into a cam groove 8a of a cam slider 8, and the cam slider 8 is moved to the front of the main chassis 2 in the left and right directions e and f orthogonal to the forward and backward movements a and b. The optical pickup 9 and the spindle motor 10 that can move forward and backward a and b are arranged on the drive chassis 5, and the upper end portion 11 a of the rotary shaft 11 that extends upward from the spindle motor 10 is disposed on the drive chassis 5. A turntable 12 is fitted. 13
Is a disk holder with a magnet arranged on a cross beam 14 installed between both side walls of the main chassis 2 so as to be movable up and down within a certain range.

The operation principle will be described. The solid line in FIG. 8 and FIG. 9A show the play mode. By pressing the disc holder 13 against the disc D lifted by the turntable 12, the disc D is placed on the turntable 12. The disk D is rotated at high speed in the direction of arrow g by the spindle motor 10 via the rotating shaft 11 and the turntable 12, the information recorded on the disk D is read by the optical pickup 9, and the image is reproduced on the monitor. .

When an unloading signal is input from the play mode, as shown in FIG. 9B, the cam slider 8 is slid leftward e (or rightward f) to move the drive chassis 5 downward d, thereby turning After delivering the disk D from the table 12 onto the tray 3,
The tray 3 is moved forward a, the disk D is removed from the tray 3, and a new disk D is placed on the tray 3.

Subsequently, when a loading signal is input, as shown in FIG. 9A, after the tray 3 is moved backward b and stored in the housing 1, the cam slider 8 is moved in the right direction f (or left direction e). The disk D on the tray 3 is set on the turntable 12 by sliding and moving the drive chassis 5 upward.

According to the above configuration, the dust tends to accumulate in the housing 1 due to, for example, the intake action of the air circulation fan provided in the housing 1, and the accumulated dust floats to record the recording surface of the disk D or the optical pickup. 9 adheres to the objective lens, there is a possibility that a reading error occurs or the dust accumulates on the printed circuit board and causes a short circuit accident.

There exists what was described in patent document 1 as a technique which eliminates the said difficulty. This uses static electricity generating means for generating static electricity by applying a high voltage to the conductive metal, and it is conceivable that the static electricity generating means is disposed in the housing 1 to adsorb dust.
JP-A-1-227276

In the above conventional configuration, since the static electricity generating means that is expensive and consumes a large amount of power is used, the manufacturing cost is high and the running cost is high.

An object of the present invention is to provide a disk device having a dust processing function with an inexpensive structure in view of the above-described conventional drawbacks.

In order to achieve the above object, according to a first aspect of the present invention, an optical pickup and a spindle motor are disposed in a synthetic resin casing, and a turntable is fitted to an upper end portion of a rotating shaft extending upward from the spindle motor. The disk set on the turntable is rotated at a high speed by a spindle motor, and the information recorded on the disk is read by the optical pickup. A cleaning brush is attached to the lower end of the rotating shaft, and a slit-like dust discharge port is provided through the bottom surface of the housing so as to cross the cleaning area by the brush. Outlet is inclined diagonally downward along the direction of rotation of the brush and out of both front and rear edges facing the brush of the dust outlet, The ridge is formed by slightly projecting the front side edge of the rear side, and the rear side edge is obliquely deleted and inclined obliquely downward by a predetermined angle toward the dust outlet and downward from the bottom surface of the housing. An inclined guide surface that is lowered at a predetermined interval is formed, and at the same time as the turntable is rotated at a high speed via a rotating shaft by a spindle motor, the brush is rotated at a high speed to clean the bottom surface of the casing. It is characterized in that the dust adhering to the brush is scraped into the dust discharge port by contacting the protruding portion through the inclined guide surface.

According to a second aspect of the present invention, an optical pickup and a spindle motor are disposed in a synthetic resin casing, and a turntable is fitted to an upper end portion of a rotating shaft extending upward from the spindle motor. In the disk device in which the disk set in is rotated at high speed by a spindle motor and the information recorded on the disk is read by the optical pickup, the lower end portion of the rotating shaft is extended downward from the spindle motor,
A cleaning brush is attached to the lower end of the rotating shaft, and the turntable is rotated at a high speed via the rotating shaft by a spindle motor, and at the same time, the brush is rotated at a high speed. It is characterized by cleaning.

According to a third aspect of the present invention, in the second aspect of the present invention, a slit-like dust discharge port is formed through the bottom surface of the housing so as to cross a cleaning area by a brush. Yes.

According to a fourth aspect of the present invention, in the third aspect of the present invention, the dust discharge port is inclined obliquely downward along the rotation direction of the brush.

According to a fifth aspect of the present invention, in the invention of the third or fourth aspect, of the front and rear side edges facing the brush of the dust discharge port, the front side edge slightly protrudes upward, and the ridge portion is It is formed, and the dust adhering to the brush is scraped off into the dust discharge port by the protruding portion.

According to a sixth aspect of the present invention, in the third or fourth aspect of the invention, of the front and rear side edges facing the brush of the dust discharge port, the rear side edges thereof are obliquely deleted and directed toward the dust discharge port. An inclined guide surface that is inclined obliquely downward by a predetermined angle and downward from the bottom surface of the housing by a predetermined interval is formed, and by contacting the brush with the front side edge of the dust discharge port through the inclined guide surface, Dust adhering to the brush is scraped into the dust discharge port.

The invention according to claim 7 is the invention according to claim 3 or 4, wherein the front side edge of the front and rear side edges facing the brush of the dust discharge port is slightly protruded upward, and the ridge is formed. An inclined guide surface is formed that is formed obliquely and has its rear side edge removed obliquely and inclined obliquely downward toward the dust discharge opening by a predetermined angle and downward from the bottom surface of the housing by a predetermined distance. The brush is brought into contact with the protruding portion through the surface, so that dust adhering to the brush is scraped off into the dust discharge port.

The invention according to claim 1 corresponds to an embodiment (see FIGS. 1 to 5 and 7), and according to this, the brush is rotated at high speed by a spindle motor, and the brush rotates at high speed. By cleaning the bottom surface of the synthetic resin casing with the brush, the cleaning area on the bottom surface is rubbed with a brush to generate static electricity, and the dust in the casing is adsorbed to the cleaning area on the bottom surface by the electrostatic adsorption action. . Therefore, there is almost no dust floating in the housing, and as described at the beginning, the floating dust adheres to the recording surface of the disk and the objective lens of the optical pickup, causing a reading error, or the dust is deposited on the printed circuit board. There is no risk of accumulating short-circuit accidents, and a comfortable disk environment can be provided over a long period of time.

What is important here is that the spindle motor for the turntable is also used as a means for generating static electricity, and it is only necessary to extend the lower end of the rotating shaft of the spindle motor downward and attach the brush. Compared with the case where the conventional static electricity generating means which consumes a large amount of power is used, the manufacturing cost is very low and the running cost is hardly required, which is economical.

In addition, dust collected in the cleaning area on the bottom surface of the housing is collected with a brush and discharged from the slit-shaped dust discharge port, so that dust can be prevented from accumulating in the housing.

Further, since the dust discharge port is inclined obliquely downward along the rotation direction of the brush, the dust can be smoothly discharged along the inclined inner surface of the dust discharge port, and the dust is discharged from the outside. Intrusion into the housing through the discharge port can be prevented.

In addition, when the dust is collected up to the dust outlet by cleaning the bottom surface of the housing with a brush, the brush passes over the inclined guide surface formed at the rear edge of the dust outlet and reaches the front edge of the dust outlet. At this time, since the step between the protruding portion and the inclined guide surface is large, dust attached to the brush can be more reliably scraped into the dust discharge port by the protruding portion. .

The invention according to claim 2 corresponds to the basic form. According to this, the brush is rotated at a high speed by a spindle motor, and the bottom surface of the synthetic resin casing is cleaned by the brush rotating at a high speed. The cleaning area on the bottom surface is rubbed with a brush to generate static electricity, and the dust in the housing is adsorbed to the cleaning area on the bottom surface by the electrostatic adsorption action. Therefore, there is almost no dust floating in the housing, and as described at the beginning, the floating dust adheres to the recording surface of the disk and the objective lens of the optical pickup, causing a reading error, or the dust is deposited on the printed circuit board. There is no risk of accumulating short-circuits, and a comfortable disc environment can be provided over a long period of time.

What is important here is that the spindle motor for the turntable is also used as a means for generating static electricity, and it is only necessary to extend the lower end of the rotating shaft of the spindle motor downward and attach the brush. Compared with the case where the conventional static electricity generating means which consumes a large amount of power is used, the manufacturing cost is very low and the running cost is hardly required, which is economical.

According to the third aspect of the present invention, the dust adsorbed in the cleaning area on the bottom surface of the casing is collected by the brush and discharged from the slit-shaped dust outlet, so that the dust is not accumulated in the casing. it can.

According to the fourth aspect of the present invention, since the dust discharge port is inclined obliquely downward along the rotation direction of the brush, the dust is smoothly discharged along the inclined inner surface of the dust discharge port. It is possible to prevent dust from entering the housing through the dust discharge port from the outside.

According to the fifth aspect of the present invention, when the dust is collected up to the dust discharge port by cleaning the bottom surface of the housing with the brush, the ridge formed on the front side edge of the dust discharge port is dust attached to the brush. Thus, it can be surely scraped off into the dust outlet.

According to the invention described in claim 6, when the bottom surface of the housing is cleaned by the brush and the dust is collected to the dust discharge port, the brush passes over the inclined guide surface formed at the rear side edge of the dust discharge port. The front side edge of the dust discharge port can be reliably scraped off the dust adhering to the brush by the front side edge.

According to the seventh aspect of the present invention, when the bottom surface of the housing is cleaned by the brush and the dust is collected to the dust discharge port, the brush passes over the inclined guide surface formed at the rear side edge of the dust discharge port. The ridge formed on the front side edge of the dust discharge port is contacted. At this time, the step between the ridge and the inclined guide surface is large. It can be scraped off more reliably.

1 and 2 show a DVD player (disk device) according to an embodiment of the present invention. A lower end portion 11b of a rotating shaft 11 of a spindle motor 10 is the spindle motor 1.
The cleaning brush 15 is attached to the lower end portion 11 b of the rotating shaft 11 via a fixture 16. Since the configuration other than the above is substantially the same as the configuration shown in FIGS. 8 and 9, the same parts are denoted by the same reference numerals and the description thereof is omitted.

As shown in FIGS. 3 to 5, the fixture 16 includes a boss 18 fitted to the lower end portion 11 b of the rotating shaft 11 and fixed to a predetermined height position of the lower end portion 11 b by a bolt 17, and the boss A support rod 19 extending in a horizontal direction from 18, and a substantially U-shaped holder 20 having a transverse cross section fitted to the support rod 19, and a base end portion of the synthetic resin brush 15 between both ends of the holder 20. Is inserted and fastening device 2
It is fixed at 1.

In the above configuration, in the play mode shown in FIG.
As a result, the support rod 19 is positioned substantially parallel to the bottom surface 1A of the bottom chassis 1a, and the entire tip of the brush 15 is in contact with the bottom surface 1A of the bottom chassis 1a substantially evenly ( 3 and FIG. 7), the spindle motor 10 rotates the turntable 12 at high speed via the rotating shaft 11 and simultaneously rotates the brush 15 at high speed to clean the bottom surface 1A of the bottom chassis 1a.

In the unloading mode shown in FIG. 2B, when the drive chassis 5 is moved downward d and tilted, the support rod 19 is also tilted in the same manner, and the tip of the brush 15 is the bottom surface 1A of the bottom chassis 1a. So that the downward movement d of the drive chassis 5 is not hindered.

According to the above configuration, the brush 15 is rotated at a high speed by the spindle motor 10, and the bottom surface 1A of the bottom chassis 1a is cleaned with the brush 15 rotating at a high speed.
The ring-shaped cleaning area B (see FIG. 5) centering on the rotating shaft 11 is rubbed by the brush 15 to generate static electricity, and the dust in the housing 1 is cleaned by the static electricity adsorption action on the bottom surface 1A. To be adsorbed. Therefore, there is almost no dust floating in the housing 1, and the floating dust adheres to the recording surface of the disk D and the objective lens of the optical pickup 9 as described at the beginning, causing a reading error, or the dust is There is no risk of short circuit accidents accumulating on the printed circuit board, and a comfortable disk environment can be provided over a long period of time.

What is important here is that the spindle motor 10 for the turntable 12 is also used as a means for generating static electricity.
It is only necessary to extend the lower end portion 11b downward and attach the brush 15 with the fixture 16. Therefore, the manufacturing cost is extremely low and the running cost is lower than in the case of using static electricity generating means that is expensive and consumes a large amount of power. However, it costs little and is economical.

As shown in FIGS. 5 and 6A, a slit dust discharge port 23 having a predetermined width h (for example, 1 to 3 mm) is provided through the bottom surface 1A of the bottom chassis 1a so as to cross the cleaning area B. ,
The dust discharge port 23 is obliquely downward along the rotation direction g of the brush 15 with a predetermined angle α (for example, 6
0 to 70 °).

According to the above configuration, the dust adsorbed in the cleaning area B of the bottom surface 1A of the bottom chassis 1a is collected by the brush 15 and discharged from the slit dust discharge port 23, so that the dust is not accumulated in the housing 1. be able to.

Further, the dust can be smoothly discharged along the inner side surface 23a inclined obliquely downward along the rotation direction g of the brush 15 of the dust discharge port 23, and the dust can be discharged from the outside.
Intrusion into the housing 1 through 3 can be prevented.

FIG. 6B shows an example of the deformation of the dust discharge port 23, and the front side edge 23b of the front and rear side edges 23b, 23c facing the brush 15 of the dust discharge port 23 is directed upward. A protruding portion 25 having a substantially triangular cross section having a predetermined height i (for example, 1 to 3 mm) is formed by slightly projecting, and the bottom surface 1A of the bottom chassis 1a is cleaned by the brush 15 to collect dust to the dust discharge port 23. When collected, the dust adhering to the brush 15 can be reliably scraped off into the dust discharge port 23 by the protrusion 25.

FIG. 6C shows a second example of the deformation of the dust discharge port 23. Of the front and rear side edges 23b, 23c facing the brush 15 of the dust discharge port 23, the rear side edge 23c is inclined. The inclined guide surface 26 that is deleted and inclined obliquely downward by a predetermined angle β (for example, 45 °) toward the dust discharge port 23 and downward from the bottom surface 1A of the bottom chassis 1a by a predetermined interval k (for example, 1 to 3 mm).
When the bottom surface 1A of the bottom chassis 1a is cleaned by the brush 15 and dust is collected up to the dust discharge port 23, the brush 15 passes over the inclined guide surface 26 and the dust discharge port 23.
Therefore, dust adhering to the brush 15 can be surely scraped into the dust discharge port 23 by the front side edge 23b.

FIG. 7 shows a third example of the deformation of the dust discharge port 23, which is a combination of FIGS. 6B and 6C, and includes both front and rear side edges 23 b facing the brush 15 of the dust discharge port 23. , 23c
Among them, the front side edge 23b is slightly protruded upward to form a protrusion 25 having a predetermined height i, and the rear side edge 23c is removed obliquely and obliquely downward toward the dust outlet 23. An inclined guide surface 26 inclined at a predetermined angle β and inclined downward by a predetermined distance k from the bottom surface 1A of the bottom chassis 1a is formed, and the bottom surface 1A of the bottom chassis 1a is cleaned by the brush 15 to collect dust to the dust outlet 23. The brush 15 passes over the inclined guide surface 26 and the ridge portion 25.
At this time, since the step n between the protruding portion 25 and the inclined guide surface 26 is large, dust adhering to the brush 15 is more surely scraped into the dust discharge port 23 by the protruding portion 25. Can do.

In the above embodiment, the DVD player has been described as an example. However, the present invention is not limited to this, and the present invention is also applicable to various disk devices such as a DVD recorder, a CD player, and a CD recorder.

It is a horizontal sectional view showing a DVD player which is an embodiment of the present invention. (A) is a longitudinal sectional view showing the play mode, and (b) is a longitudinal sectional view showing the unloading mode. It is a longitudinal cross-sectional view of the principal part. It is an AA arrow line view of FIG. It is a disassembled perspective view of the principal part. (A) is a vertical perspective view of the dust discharge port, (b) is a vertical perspective view showing a first example of deformation of the dust discharge port, and (c) is a vertical perspective view of a second example of deformation of the dust discharge port. is there. It is a longitudinal cross-sectional view which shows the 3rd example of a deformation | transformation of the same dust discharge port. It is a horizontal sectional view showing a conventional example. (A) is a longitudinal sectional view showing the play mode, and (b) is a longitudinal sectional view showing the unloading mode.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Housing | casing 1A Bottom face 9 Optical pick-up 10 Spindle motor 11 Rotating shaft 11a Upper end part of rotating shaft 11b Lower end part of rotating shaft 12 Turntable 15 Brush 16 Mounting tool 23 Dust outlet 23a Front edge of dust outlet 23b Dust outlet Rear edge 25 of the ridge 26 Inclined guide surface B Cleaning area g Direction of brush rotation α Inclination angle of the dust outlet

Claims (7)

An optical pickup and a spindle motor are arranged in a synthetic resin casing, and a turntable is fitted to the upper end of a rotary shaft extending upward from the spindle motor. A disk set on the turntable is fastened by a spindle motor. In the disk device that is rotated, and the information recorded on the disk is read by the optical pickup,
A lower end portion of the rotating shaft extends downward from the spindle motor, a cleaning brush is attached to the lower end portion of the rotating shaft, and a slit-like dust is formed on the bottom surface of the casing so as to cross a cleaning area by the brush. A discharge port is provided, the dust discharge port is inclined obliquely downward along the rotation direction of the brush, and the front side edge of the front and rear side edges facing the brush of the dust discharge port is slightly protruded upward. The protrusion is formed, and the rear side edge thereof is removed obliquely, and an inclined guide surface that is inclined obliquely downward by a predetermined angle toward the dust outlet and is lowered downward from the bottom surface of the housing by a predetermined interval is formed. And the spindle motor rotates the turntable at high speed via the rotating shaft and simultaneously rotates the brush at high speed to clean the bottom surface of the housing, and passes the high-speed rotating brush forward on the inclined guide surface. By contacting the protrusions, the disk device being characterized in that the dust adhering to the brush as scrape the dust discharge mouth. An optical pickup and a spindle motor are arranged in a synthetic resin casing, and a turntable is fitted to the upper end of a rotary shaft extending upward from the spindle motor. A disk set on the turntable is fastened by a spindle motor. In the disk device that is rotated and the information recorded on the disk is read by the optical pickup,
A lower end portion of the rotating shaft extends downward from the spindle motor, and a cleaning brush is attached to the lower end portion of the rotating shaft, and the brush is rotated at the same time the turntable is rotated at high speed via the rotating shaft by the spindle motor. A disk device characterized by rotating at a high speed and cleaning the bottom surface of the casing with the brush rotating at a high speed. 3. The disk device according to claim 2, wherein a slit-like dust discharge port is provided through the bottom surface of the housing so as to cross a cleaning area by a brush. 4. The disk device according to claim 3, wherein the dust discharge port is inclined obliquely downward along the rotation direction of the brush. Of the front and rear side edges facing the brush of the dust discharge port, a protrusion is formed by slightly projecting the front side edge upward, and dust adhering to the brush is caused to enter the dust discharge port by the protrusion. 5. The disk device according to claim 3, wherein the disk device is scraped off. Inclined guides that are obliquely removed from the bottom surface of the casing downward by a predetermined angle by obliquely removing the rear side edges of the front and rear side edges facing the brush of the dust discharge opening obliquely and tilting downward toward the dust discharge opening. A surface is formed and the brush is brought into contact with the front side edge of the dust discharge port through the inclined guide surface, so that dust adhering to the brush is scraped into the dust discharge port. The disk device according to claim 3 or 4. Among the front and rear side edges facing the brush of the dust discharge port, the front side edge slightly protrudes upward to form a ridge, and the rear side edge is removed obliquely toward the dust discharge port. An inclined guide surface inclined obliquely downward by a predetermined angle and downward from the bottom surface of the housing by a predetermined interval is formed, and the brush is attached to the brush by contacting the protruding portion through the inclined guide surface. 5. The disk device according to claim 3, wherein dust to be scraped is scraped off into the dust discharge port.

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