JP2008165851A - Imaging device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To effectively cool components within a mechanical deck storage compartment without using a cooling fan in an imaging device, such as a digital video camera. <P>SOLUTION: The imaging device 1 comprises providing a device housing 2 with a disk-shaped recording medium storage compartment 11, projecting a turntable 13 from a base 12 of the disk-shaped recording medium storage compartment 11 into the disk-shaped recording medium storage compartment 11, and accommodating an optical pickup 14 etc., into a mechanical deck storage compartment 15 on a side inner than the base 12. The base 12 of the disk-shaped recording medium storage compartment 11 is provided with an air flow inlet 21 for introducing the air flow generated within the disk-shaped recording medium storage compartment 11 by rotation of the disk-shaped recording medium 31 chucked to the turntable 13 into the mechanical deck storage compartment 15. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an image pickup apparatus that records and / or reproduces information signals on a disk-shaped recording medium, and in particular, is effective in using heat generated by a semiconductor element or a motor used in the apparatus without using a cooling fan or the like. It can be cooled down automatically.

  For example, a digital video camera as shown in FIG. 9 is known as an imaging apparatus that uses a disk-shaped recording medium. The digital video camera 101 includes a disk-shaped recording medium storage portion 103 on one side of an apparatus housing (exterior case) 102, and the disk-shaped recording medium is stored from the bottom surface 104 of the disk-shaped recording medium storage portion 103. A turntable 105 protrudes into the portion 103, and a mechanical deck (not shown) on which an optical pickup 107 is mounted is stored in a mechanical deck storage portion 106 inside the bottom surface 104. The mechanical deck is mounted with a motor for rotating the printed circuit board and the turntable 105, a motor for driving the optical pickup 107, and the like.

  Then, the disk-shaped recording medium 110 is chucked on the turntable 105, the disk-shaped recording medium 110 is rotated in the disk-shaped recording medium storage unit 103, and the optical pickup 107 is moved to the disk-shaped recording medium 110. Information signals are recorded and / or reproduced on the disk-shaped recording medium 110 while moving in the radial direction.

  As described above, since many components that generate heat, such as semiconductor elements and motors, are stored in the mechanical deck storage portion 106 inside the bottom plate 104, the mechanical deck storage portion is generated by the heat generated by these components. The temperature in 106 rises and adversely affects the components and the like stored in the mechanical deck storage unit 106.

In order to suppress the temperature rise in the mechanical deck storage unit 106, a video camera has been developed that cools components in the mechanical deck storage unit 106 by introducing outside air into the mechanical deck storage unit 106 using a cooling fan. (For example, refer to Patent Document 1).
JP 2005-63534 A

  By the way, the conventional digital video camera uses a cooling fan, which increases the number of parts and causes cost. In addition, a space for installing a cooling fan is required, which has become a bottleneck in reducing the size of a digital video camera.

  An object of the present invention is to provide an imaging device such as a digital video camera that can effectively cool components in a mechanical deck storage unit without using a cooling fan.

The present invention provides a disk-shaped recording medium storage portion in an apparatus housing, projects a turntable from the bottom surface of the disk-shaped recording medium storage portion into the disk-shaped recording medium storage portion, and stores a mechanical deck inside the bottom surface. In an imaging apparatus that records and / or reproduces by storing an optical pickup in the unit,
An air flow inlet for introducing an air flow generated in the disk-shaped recording medium storage unit into the mechanical deck storage unit by rotation of the disk-shaped recording medium chucked on the turntable on the bottom surface of the disk-shaped recording medium storage unit Was established.

  The air flow generated in the disk-shaped recording medium storage portion by the rotation of the disk-shaped recording medium is introduced into the mechanical deck storage portion from the air flow inlet provided in the bottom plate of the disk-shaped recording medium storage portion. The heat generating components of the semiconductor element and the optical pickup housed in the unit are cooled.

  1 is a perspective view of an image pickup apparatus according to the present invention, FIG. 2 is a perspective view in which a cover of a disc-shaped recording medium storage unit is opened, FIG. 3 is a perspective view in which a disc-shaped recording medium is chucked on a turntable, and FIG. FIG. 5 is an enlarged perspective view of the air flow inlet port portion, and FIG. 6 is a cross-sectional view taken along line AA of FIG.

  As shown in FIG. 1, the imaging device 1 of the present invention is configured as a digital video camera. The imaging device 1 is provided with an imaging lens 3 on the front side of the device housing 2, a built-in microphone 4 and an active interface shoe 5 on the upper side, and an optical viewfinder 6 and a screen such as a liquid crystal on one side. A display unit 7 is provided, and a recording medium storage unit opening / closing cover 8 and a grip belt 9 whose outer surface is a grip surface are provided on the other end side.

  As shown in FIG. 2, a disc-shaped recording medium storage portion 11 that is opened and closed by the cover 9 is provided inside the opening / closing cover 9, and turns toward the bottom surface 12 of the disc-shaped recording medium storage portion 11. A table 13 and an optical pickup 14 are provided. The turntable 13 protrudes from the bottom surface 12 into the disc-shaped recording medium storage unit 11. The optical pickup 14 is disposed in a mechanical deck storage 15 inside the bottom surface 12 of the disk-shaped recording medium storage 11. The optical pickup 14 faces the disc-shaped recording medium storage unit 11 via a notch window 16 provided on the bottom surface 12 of the disc-shaped recording medium storage unit 11.

  On the bottom surface 12 of the disk-shaped recording medium storage unit 11, an air flow inlet for introducing an air flow generated in the disk-shaped recording medium storage unit 11 into the mechanical deck storage unit 15 due to rotation of the disk-shaped recording medium or the like. 21 is provided.

  FIG. 3 shows a state where the disc-shaped recording medium 31 is chucked on the turntable 13. The air flow inlet 21 is provided outside the outer peripheral edge 31 a of the disk-shaped recording medium 31 chucked on the turntable 13.

  FIG. 4 is a perspective view showing a flow of air by breaking a part of the bottom surface 12 of the disk-shaped recording medium 31 and the disk-shaped recording medium storage unit 11. The air flow a introduced into the mechanical deck storage unit 15 from the air flow introduction port 21 circulates in the mechanical deck storage unit 15 and is mounted on a printed circuit board 41 disposed in the mechanical deck storage unit 15. The heat generating component 42 such as an element, the spindle motor 43, the drive motor of the optical pickup 14 or the like is cooled.

  As shown in FIGS. 5 and 6, the air flow inlet 21 is formed by providing a long hole penetrating the upper and lower surfaces of the bottom surface 12 of the disc-shaped recording medium storage unit 11.

  A first guide surface 22 for smoothly introducing the airflow a into the airflow inlet 21 is provided on the upstream side of the airflow inlet 21, that is, in the direction in which the airflow a flows. Yes. The first guide surface 22 is formed by making the upper surface side of the bottom surface 12 a downwardly inclined surface so that the thickness of the bottom surface 12 of the disc-shaped recording medium storage unit 11 gradually decreases. The airflow a flowing on the bottom surface 12 of the disc-shaped recording medium storage unit 11 is smoothly guided to the airflow inlet 21. Further, the air flow a introduced from the air flow introduction port 21 is smoothly introduced to the mechanical deck storage unit 15 side in the downstream side of the air flow introduction port 21, that is, in the direction in which the air flow a flows away. For this purpose, a second guide surface 23 is provided. The second guide surface 23 is formed by making the lower surface side of the bottom surface 12 a downwardly inclined surface so that the thickness of the bottom surface 12 of the disc-shaped recording medium storage unit 11 gradually increases. The air flow a introduced from the air flow introduction port 21 is smoothly introduced into the mechanical deck storage unit 15.

  As shown in FIG. 5, the first guide surface 22 is formed in a so-called divergent shape that gradually increases in width as it goes from the upstream side to the downstream side, so that air also flows from the side of the air flow inlet 21. The flow a is entrained to facilitate introduction into the air flow inlet 21.

  7 and 8 show another embodiment of the first guide surface 22 described above. In this embodiment, the first guide surface 22 includes a downwardly inclined surface 22a, an arc surface 22b continuous with the inclined surface 22a, and a non-inclined surface 22c connected with the arc surface 22b. By generating turbulent flow on the circular arc surface 22b, the effect of drawing in the air flow is improved.

  Next, the operation of the imaging device 1 will be described. When the disk-shaped recording medium 31 is chucked on the turntable 13 and the opening / closing cover 9 is closed and the turntable 13 and the disk-shaped recording medium 31 are rotated, the turntable 13 and the disk-shaped recording medium 31 are rotated. Then, an air flow a is generated in the disc-shaped recording medium storage unit 11. In particular, the outer peripheral portion of the disc-shaped recording medium 31 has a higher rotational speed (linear velocity) than the inner peripheral portion, so that an air flow that is faster than the inner peripheral portion is generated.

  High-speed airflow generated at the outer periphery of the disc-shaped recording medium 31 is guided to the airflow inlet 21 by the first guide surface 22 and further guided to the second guide surface 23 to smoothly It is introduced into the mechanical deck storage unit 15 and cools heat-generating components such as semiconductor elements arranged in the mechanical deck storage unit 15. In addition, although the case where the one airflow inlet 21 was provided was shown in the said Example, you may provide the several airflow inlet 21. FIG. Further, the air flow inlet 21 can be effectively cooled by providing the air flow inlet 21 in the vicinity of the heat generating component such as a semiconductor element. Moreover, you may make it the structure which guides an air flow intensively to the vicinity of a heat-emitting component by a duct from the air flow inlet 21. In the embodiment, the case where the air flow inlet 21 is formed outside the outer peripheral edge of the disk-shaped recording medium 31 is shown. However, the air flow inlet 21 is formed at a position overlapping the disk-shaped recording medium 31. May be. In the above embodiment, a digital video camera has been described as an example. However, the present invention is not limited to a digital video camera and may be another imaging device. Further, a recording and / or reproducing apparatus for a disk-shaped recording medium that uses a disk-shaped recording medium and performs recording and / or reproduction while rotating the disk-shaped recording medium may be used.

The perspective view of the imaging device of the present invention. The perspective view which opened the recording medium accommodating part opening / closing cover. The perspective view which chucked the disk-shaped recording medium on the turntable. The perspective view which fractured | ruptured some disc-shaped recording media and a recording-medium storage part. The expansion perspective view of an airflow introduction port part. AA sectional drawing of FIG. The expansion perspective view of the other Example of an airflow introduction port. AA sectional drawing of FIG. The perspective view of a prior art example.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Imaging device, 8 ... Recording medium storage part opening / closing cover, 11 ... Disc-shaped recording medium storage part, 12 ... Bottom of disk-shaped recording medium storage part, 13 ... Turntable, 14 ... Optical pickup, 15 ... Mechanical deck storage part, DESCRIPTION OF SYMBOLS 21 ... Air flow introduction port, 22 ... 1st guide surface, 23 ... 2nd guide surface, 31 ... Disc-shaped recording medium, 31a ... Outer periphery of a disc-shaped recording medium

Claims (7)

A disk-shaped recording medium storage portion is provided in the apparatus housing, and a turntable is protruded from the bottom surface of the disk-shaped recording medium storage portion into the disk-shaped recording medium storage portion, and an optical pickup is provided in the mechanical deck storage portion inside the bottom surface. In an imaging device that houses
An air flow introduction for introducing an air flow generated in the disk-shaped recording medium storage unit into the mechanical deck storage unit by rotation of the disk-shaped recording medium chucked on the turntable is provided on the bottom surface of the disk-shaped recording medium storage unit. An imaging apparatus characterized by providing a mouth.   2. The imaging apparatus according to claim 1, wherein the air flow inlet is disposed outside an outer peripheral edge of a disk-shaped recording medium chucked on the turntable.   2. The first guide surface for guiding the air flow to the air flow introduction port is provided upstream of the air flow introduction port with respect to the flow direction of the air flow. Imaging device.   The imaging apparatus according to claim 3, wherein the first guide surface is formed by inclining a bottom surface of the disc-shaped recording medium storage portion toward the air flow inlet in a downward gradient. .   The first guide surface is formed by being formed in a divergent shape in which the width on the upstream side in the flow direction of the airflow is narrow and the width becomes wider toward the downstream side. Item 4. The imaging device according to Item 3.   The imaging apparatus according to claim 1, wherein the air flow introduction port is provided in the vicinity of a heat generating component arranged in the mechanical deck storage unit.   2. The imaging apparatus according to claim 1, wherein a duct for guiding an air flow introduced from the air flow introduction port to a position of a heat generating component in the mechanical deck storage unit is provided in the mechanical deck storage unit.

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