JP2009301673A - Optical disk device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prolong the life of an optical disk device by reducing dust inside the optical disk device and further preventing dust from accumulating on optical components of an optical pickup. <P>SOLUTION: An outer chassis 30 provided in the optical disk device 10 is provided with an air outlet 38 of airflow that is generated in accordance with the rotation of an optical disk. The optical pickup device 60 located under an opening 26 of an inner chassis 20 of the optical disk device 10 is provided at a position which avoids a path for airflow where air flows from an optical disk insertion part 320 toward the air outlet 38 in accordance with the rotation of the optical disk. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an optical disk device including an optical pickup device that irradiates a laser onto an optical disk medium such as a CD or a DVD.

  In recent years, optical disc apparatuses that record and reproduce optical discs such as CDs (Compact Discs) and DVDs (Digital Versatile Discs or Digital Video Discs) are widely used. Furthermore, next-generation optical discs such as Blu-ray Discs with further increased recording capacities have been developed and are becoming popular.

  The optical disk device includes an optical pickup device in the optical disk device. This optical pickup device stores / reproduces data by emitting / injecting a laser.

  FIG. 4 is a schematic perspective view showing a conventional in-vehicle slot-in type optical disc apparatus 14. As shown in FIG. 4, the optical disk device 14 mainly includes an inner chassis 20, an outer chassis 30, a disk rotation driving unit 40, a clamp arm 50, and an optical pickup device 60.

  As a conventional problem, the optical pickup device 60, the optical disc rotation drive unit 40, and the wiring board (not shown) in the optical disc device 14 generate heat due to the operation for recording / reproducing of the optical disc, and the temperature in the device is thereby increased. There was a possibility that was more than expected.

  Further, dust introduced from the outside adheres to the optical pickup device 60, thereby causing a drop in laser emission / incident level. Further, when the amount of dust attached increases, there is a problem that recording / reproducing of the optical disk becomes impossible and the service life of the optical pickup device 60 is shortened.

  To solve these problems, a structure is provided that cools the inside of the apparatus, particularly the optical pickup, by introducing external air from the opening on the back of the optical disk apparatus without using a cooling fan, and further includes a filter at the opening on the back of the optical disk apparatus. An example of an optical disk device that prevents intrusion of dust from the filter is described in Patent Document 1.

JP 2006-323955 A

  However, the optical disk device disclosed in Patent Document 1 can effectively prevent the intrusion of dust from the back of the device, but is effective for dust from the optical disk insertion portion and dust attached to the optical disk. Absent. Further, no consideration is given to suppressing dust accumulated on the optical pickup device.

  The present invention has been made in view of such a problem, and reduces dust in the optical disk device, further suppresses dust accumulation on the optical pickup optical component, and realizes a long life of the optical disk device. With the goal.

  An optical disc apparatus according to the present invention includes a housing provided with an optical disc insertion portion on a front surface thereof, a rotation driving portion that is provided in the housing and that rotates and drives an optical disc supplied from the optical disc insertion portion, In the optical disc apparatus comprising an optical pickup device for irradiating the optical disc with a laser, the housing includes an exhaust port for an air flow generated along with the rotation of the optical disc, and the optical pickup device is adapted to rotate the optical disc. Accordingly, it is provided at a position that avoids the path of the air flow that flows from the optical disc insertion portion toward the exhaust port.

  For example, in the optical disc apparatus, the exhaust port is disposed at a left position when viewed from the optical disc insertion portion on the rear surface of the housing, and the optical pickup device is located at a right rear side when viewed from the optical disc insertion portion. It is arranged.

  For example, the optical disc insertion portion of the optical disc apparatus is a slot-in insertion slot provided on the front surface of the housing.

  According to the present invention, it is possible to reduce the dust in the optical disk device, further suppress the accumulation of dust on the optical pickup optical component, and extend the life of the optical disk device.

  Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a schematic perspective view showing an in-vehicle slot-in type optical disc apparatus 10 according to an embodiment of the present invention. As shown in FIG. 1, an optical disc apparatus 10 includes an inner chassis 20 in which an optical disc is disposed, an outer chassis (housing) 30 provided outside the inner chassis 20, and a central portion of the inner chassis 20, and an optical disc The disk rotation drive unit 40 rotates, the clamp arm 50 fixes the optical disk to the inner chassis 20, and the optical pickup device 60 that irradiates the optical disk with laser. The basic configuration of the optical disc apparatus 10 will be described below.

  First, the outer chassis 30 includes a side plate 300, a lower plate 302, a front plate 32, and an upper plate (not shown), and forms a box shape as a housing of the inner chassis 20. The front plate 32 is provided with an opening (optical disc insertion portion) 320 for slot-in of an optical disc. The outer chassis 30 is fixed and installed in a set provided in a vehicle or the like.

  Next, the inner chassis 20 is provided in the outer chassis 30 and includes a lower inner chassis 22 and an upper inner chassis 23. The lower inner chassis 22 is a size smaller than the lower plate 302 of the outer chassis 30, is formed in a plate shape, and is provided inside the outer chassis 30. Next, the upper inner chassis 23 is provided on the upper part of the lower inner chassis 22, and is disposed apart from the front plate 32 of the outer chassis 30 with a space between the front plate 32. The upper inner chassis 23 includes a side plate 230, a bottom plate 232, and a front plate 234. The configuration will be described in detail. A side plate 230 is provided along the inner surfaces of the three side plates 300 of the outer chassis 30, and the inner surface of the three side plates 230 is, for example, about half the height of the side plate 230. A bottom plate 232 is provided at the height position. A front plate 234 is provided so as to connect the front (+ X direction) end surfaces of the side plate 230 and the bottom plate 232 and the lower inner chassis 22.

  Further, two dampers 24 made of an elastic material such as synthetic rubber are provided between the side plates 230 at both rear ends (−X, ± Y) of the upper inner chassis 23 and the side plates 300 of the outer chassis 30. . A damper 25 formed of an elastic material such as synthetic rubber is provided at the center of the lower inner chassis 22 on the front plate 32 side, similar to the damper 24. The inner chassis 20 is connected to the inner surface of the side plate 300 of the outer chassis 30 and the upper surface of the outer chassis lower plate 302 via the damper 24, and the damper provided at the center of the lower inner chassis 22 on the front plate 32 side. 25, and is connected to the upper surface of the outer chassis lower plate 302. These dampers 24 and 25 alleviate external vibration transmitted from the outer chassis 30 to the inner chassis 20. That is, since the inner chassis 20 is connected to the outer chassis 30 via the damper 24 and the damper 25, the inner chassis 20 has a floating structure with respect to the outer chassis 30.

  Further, two discrimination arms 36 are provided at both ends of the upper surface of the lower inner chassis 22 symmetrically with respect to the center line in the X-axis direction in the drawing. The optical disc apparatus 10 discriminates between an 8 cm disc and a 12 cm disc by a switch (not shown) that is turned ON / OFF via a discrimination arm 36. By discriminating these, the optical disc apparatus 10 controls the protruding amount of the optical disc when the optical disc is ejected to a position suitable for taking out.

  Next, the disk rotation drive unit 40 is provided at the center of the upper inner chassis 23 and rotates the optical disk. When the optical disk is inserted, the optical disk is conveyed onto the disk rotation driving unit 40 by rollers (not shown) and supported by the disk rotation driving unit 40 and the clamp arm 50.

  The clamp arm 50 is supported in part by the side plate 230 of the inner chassis 23, and after the optical disk is stored in the optical disk apparatus 10, supports the upper center of the optical disk. Further, an arm 70 is provided behind the inner chassis 20 (−X direction). A projection 72 directed downward is formed at the tip of the arm 70.

  Here, operations of the clamp arm 50 and the arm 70 will be briefly described. When the optical disc is inserted into the optical disc insertion section 320, a roller (not shown) provided in the inner chassis 20 carries the optical disc. The optical disk conveyed to the rear (−X direction) of the inner chassis 20 abuts on the protrusion 72 of the arm 70 and rotates the arm 70. By the rotation of the arm 70, a slider (not shown) and the clamp arm 50 are driven, and switching between the optical disk transport operation and the clamp operation is performed on the drive mechanism.

  Next, the optical pickup device 60 is provided below the opening 26 provided in the bottom plate 232 of the inner chassis 20. The opening 26 is provided on the right rear side in the optical disc insertion direction, and is formed in a rectangular shape with the longitudinal direction from the center toward the right back corner. The optical pickup device 60 includes a light emitting diode (not shown) and a photodetector (not shown) inside, and an objective lens 62 and the like on the surface. The optical pickup device 60 includes a driving device (not shown) and is provided so as to be movable in the radial direction 601 of the optical disc.

  Here, the operation of the optical pickup device 60 will be briefly described. The optical pickup device 60 writes information by transmitting laser light from a light emitting diode (not shown) inside the device through an objective lens 62, and further reflects the reflected light through the objective lens 62. Information is read by being guided to a photodetector (not shown) in the device 60.

  The optical disc apparatus 10 according to the embodiment of the present invention is located at a position facing the optical disc insertion portion 320 and on the left side (−X, −Y) when viewed from the optical disc insertion portion 320, from the inner chassis 20 to the outer chassis 30. A cylindrical exhaust duct (exhaust port) 38 that is expanded in the −X direction is provided.

  Next, the operation of this embodiment will be described. FIG. 2 is a schematic plan view showing a flow path of air containing dust when the optical disk apparatus 10 according to the embodiment of the present invention rotates the optical disk. When the optical disk is inserted into the slot-in opening (horizontal narrow hole), the roller conveys the optical disk and pulls it into the inner chassis 20 (housing). The optical disk drawn into the inner chassis 20 abuts on a protrusion 72 provided below the tip of the arm 70 to rotate the arm 70. A slider (not shown) and a clamp arm 50 that follow the rotation of the arm 70 switch between the transport operation and the clamp operation of the optical disc, and are attached to the disc rotation drive unit 40. Next, the rotation driving unit 40 rotates the optical disk in the clockwise direction, and the air containing dust that is in contact with the upper surface and the lower surface of the optical disk is rotated in the same direction as the rotation direction of the optical disk due to its viscosity. An airflow that rotates around the center is formed. In this state, the air flowing in from the slot-in opening is on the airflow flowing in the clockwise direction accompanying the rotation of the optical disc, and the exhaust duct 38 located at the back left as viewed from the front as indicated by the arrow in the figure. Flows up. On the other hand, the optical pickup device 60 is disposed on the right side (+ Y direction) of the exhaust duct 38. For this reason, since the optical pickup device 60 does not exist in the flow path of the airflow described above, it is placed in an air environment with a low density of dust, and dust accumulation on the detection unit can be suppressed. Dust contained in the air flow is discharged out of the optical disc apparatus 10 through the exhaust duct 38. The opening of the exhaust duct 38 is oriented in the substantially same direction as the direction of the tangent in the rotational direction of the airflow. For this reason, air does not flow into the optical disk device 10 through the exhaust duct 38 when the optical disk rotates.

  As described above, the optical pickup device 60 of the optical disc apparatus 10 according to the embodiment of the present invention is disposed at the rotational angle position of the optical disc immediately after the dust is discharged by the exhaust duct 38. In other words, when the exhaust duct 38 is provided in the −X and −Y regions with respect to the disk rotation driving unit 40, the optical pickup device 60 is disposed such that the operating range is in the −X and + Y regions.

  By disposing the exhaust duct 38 in this manner, dust in the optical disk device 10 can be reduced. Further, by disposing the optical pickup device 60 in this way, dust is deposited on the optical pickup device 60. Accumulation can be suppressed and the life of the optical disc apparatus can be extended.

  FIG. 3 is a schematic perspective view showing an optical disc apparatus provided with an exhaust hole (exhaust port) 380 according to another embodiment of the present invention. Although the optical disk apparatus 10 having the exhaust duct 38 has been described, as another form, as in the optical disk apparatus 12 shown in FIG. 3, the inner chassis 20 and the outer chassis 30 are simply cut in the airflow direction. The missing exhaust hole 380 may be provided instead of the exhaust duct 38.

  In addition, the optical pickup device 60 according to the embodiment of the present invention may be disposed at any position where the optical disk rotates and the air flow generated thereby avoids a path that flows toward the exhaust port. 2, an exhaust duct 38 or an exhaust hole 380 is provided at a position facing the optical disc insertion portion 320 on the right side (−X, + Y) as viewed from the optical disc insertion portion 320 with the exhaust direction facing the + X direction. Sometimes, the optical pickup device 60 may be disposed at the positions of + X and + Y.

  Moreover, although the optical disk device 10 according to the embodiment of the present invention has been described with the in-vehicle component configuration, the present invention is not limited to this, and can be applied to a home device (stationary type). In this case, the damper 24 and the damper 25 are unnecessary.

1 is a schematic perspective view showing an optical disc apparatus provided with an exhaust duct according to an embodiment of the present invention. It is a typical top view which shows the air current at the time of the optical disk rotation of the optical disk apparatus which concerns on embodiment of this invention. 1 is a schematic perspective view showing an optical disc apparatus provided with exhaust holes according to an embodiment of the present invention. It is a typical perspective view which shows the conventional optical disk apparatus.

Explanation of symbols

10, 12, 14 Optical disk device 20 Inner chassis 22 Lower inner chassis 23 Upper inner chassis 26 Opening 30 Outer chassis (housing)
320 opening (optical disc insertion part)
38 Exhaust duct (exhaust port)
380 Exhaust hole (exhaust port)
40 Disc rotation drive unit 50 Clamp arm 60 Optical pickup device

Claims (3)

A housing provided with an optical disc insertion portion on the front surface;
A rotation drive unit that is provided in the housing and that rotates and drives the optical disk supplied from the optical disk insertion unit;
In an optical disc apparatus comprising an optical pickup device for irradiating a laser to the optical disc,
The housing includes an exhaust port for an air flow generated as the optical disc rotates,
The optical pickup device is provided at a position avoiding the path of the air flow that flows from the optical disc insertion portion toward the exhaust port as the optical disc rotates. The exhaust port is disposed at a left position when viewed from the optical disc insertion portion on the rear surface of the housing,
2. The optical disc apparatus according to claim 1, wherein the optical pickup device is disposed on the right rear side when viewed from the optical disc insertion portion.   The optical disc apparatus according to claim 1, wherein the optical disc insertion portion is a slot-in insertion port provided on a front surface of the housing.

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