JP3658945B2 - Heat dissipation device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a heat dissipation device used in a portable electronic device such as a video movie.
[0002]
[Prior art]
In recent years, heat dissipation devices have been made in various ways in portable electronic devices.
[0003]
Hereinafter, an example of a conventional heat dissipation device will be described with reference to the drawings. In FIG. 5, 51 is an electronic device body case, 52 is a shield case, 53 is a flexible printed circuit (hereinafter abbreviated as FPC), 54 is a charge coupled device (Charge Coupled Device, hereinafter) for electronic imaging. (Abbreviated as CCD), 55 is a prism for splitting light, and 56 is a lens unit.
[0004]
First, the CCD 54 is mounted on one side of the FPC 53. The entrance surface of the CCD 54 is bonded to the exit surface of the prism 55. Further, the prism 55 is connected to the lens unit 56. The shield case 52 is configured to cover an electronic unit including electronic components including the FPC 53, the CCD 54, the prism 55, and the CCD 56. A connector component is mounted on the end face of the FPC 53, connected to another printed circuit board (not shown), and electrically controlled and driven. The electronic device body case 51 fixes units such as the lens 56, the CCD 54, and the shield case 52 described above, and further covers the entire electronic device to form an outer shape.
[0005]
The operation of the conventional heat radiating device configured as described above will be described.
As is well known, the CCD 54 images the optical information that has passed through the lens 56 and the prism 55, and sends the captured image information to another printed circuit board through the FPC 53. Here, when the power is turned on and energized for a certain period of time, the CCD 54 in particular generates heat. The generated heat is generated by heat radiation and heat conduction to the shield case 52, the FPC 53, the mechanism (not shown) in the electronic device, the electronic device main body case 51, and the part without the heat source such as air inside the electronic device. It diffuses and accumulates inside. The accumulated heat is dissipated to the outside air through the electronic device main body case, and the equilibrium is maintained at a certain level.
[0006]
[Problems to be solved by the invention]
However, in the conventional configuration described above, the electronic device itself has recently become very small, so that the heat capacity of the non-heating source such as the mechanism, shield case, and air is reduced, and the exterior surface area is also reduced. Even with the use of equipment, the temperature inside the electronic equipment rises rapidly and greatly, and a sufficient heat dissipation effect cannot be ensured. For this reason, the exterior surface of the electronic device becomes hot, giving the user discomfort and anxiety, and the ambient temperature of the internal electronic component exceeds the rated guaranteed value, and sufficient characteristics of the electronic device cannot be secured. Had.
[0007]
The present invention solves the above-mentioned conventional problems, and has a configuration in which a copper foil sheet having excellent heat conduction is brought into surface contact with an electronic component as a heating element and is mounted on an FPC on which the electronic component is mounted. After connecting to the shield case, an aluminum piece with a high heat capacity is provided to closely adhere and conduct the heat generated. Further, by providing a vent hole in a deep part of the exterior surface that is difficult for the user to touch, and by adjoining the aluminum piece, heat from the internal heat source is efficiently radiated to the outside of the electronic device main body. In this way, heat generated inside the electronic device body is efficiently and inexpensively dissipated without applying mechanical stress to precision equipment such as the lens, and without feeling hot when touching the exterior surface. An object is to provide a heat dissipation device.
[0008]
[Means for Solving the Problems]
In order to achieve this object, a heat dissipation device of the present invention includes at least one CCD, a lens unit having the CCD, an FPC on which the CCD is mounted, an electromagnetic shield that covers at least the CCD and the FPC. A shield case, a copper foil sheet provided between the FPC and the CCD so that part of the shield case is in close contact with the CCD, and another part in close contact with the shield case, and a close contact with the shield case An aluminum piece provided to form an outer shape of the electronic device, a vent hole provided in a position adjacent to the aluminum piece that spatially communicates the inside and outside of the outer case, and the outer case A concave portion that is a part and has at least an open top, and a sub-housing that is housed in the concave portion and rotatably held Has the vent in the concave portion has a structure in which it would like provided in an invisible position by the sub-housings.
[0009]
With this configuration, a copper foil sheet with excellent thermal conductivity is brought into surface contact with an electronic component (CCD), which is a heating element, and is attached to an FPC on which the electronic component (CCD) is mounted, and connected to a shield case. After that, an aluminum piece having a high heat capacity is provided and adhered to conduct heat generated. Further, an aluminum piece is placed adjacent to a vent hole having a dust-proof net in a place where the surface of the exterior portion is not touched by an inconspicuous hand. With the above configuration, the heat from the internal heat source is efficiently radiated to the outside of the electronic device main body. As a result, it is possible to ensure the original lens performance without applying mechanical stress at all to a portion that is precise like the lens portion and does not want to be stressed when it is joined to another unit. In addition, stable performance and operation can be secured without the heat inside the electronic device exceeding the temperature rating of the electronic component. Furthermore, it is possible to give a sense of security to the user without feeling hot even if the electronic device body is touched by hand.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
According to a first aspect of the present invention, there is provided at least one CCD, a lens unit having the CCD, an FPC having at least the CCD mounted thereon, and a shield for electromagnetically shielding at least the CCD and the FPC. A case, a copper foil sheet provided between the FPC and the CCD so that a part thereof is in close contact with the CCD, and a part of the copper foil provided in close contact with the shield case, and being in close contact with the shield case A provided aluminum piece, an outer case forming an outer shape of the electronic device, a vent hole provided in a position adjacent to the aluminum piece and communicating with the inside and outside of the outer case, and a part of the outer case A concave-shaped concave portion having at least an open top, and a sub-housing that is housed in the concave-shaped portion and held rotatably. Pores, in the concave portion has a structure that is provided in an invisible position by the sub-housings. With this structure, a copper foil sheet having excellent heat conduction and flexibility is brought into surface contact with a CCD as a heating element, attached on an FPC on which the CCD is mounted, connected to a shield case, and then aluminum having a high heat capacity. Since the pieces are provided and adhered to conduct heat generated by heat, the copper foil sheet can lower the temperature of the CCD without applying any mechanical stress to the lens unit bonded to the CCD.
[0012]
As a result, the original lens performance can be ensured without applying any mechanical stress to a portion that is precise like the lens portion and does not want to be stressed when it is joined to another unit. In addition, stable performance and operation can be secured without the heat inside the electronic device exceeding the temperature rating of the electronic component. Furthermore, it has the effect of giving the user a sense of security without feeling hot even if the electronic device body is touched by hand.
[0013]
Hereinafter, embodiments of the present invention will be described with reference to FIGS.
(Embodiment 1)
FIG. 1 is a configuration diagram of a heat dissipation device according to the first embodiment of the present invention, FIG. 2 is a detailed view of the heat dissipation device, (a) viewed from the top, and (b) viewed from the side. It is. FIG. 3 is a detailed view of the vent holes of the heat dissipation device. FIG. 4 is a detailed portion of the FPC heat transfer portion of the heat dissipation device in the embodiment of the present invention. 1-4, 11 is an exterior case, 11a is a concave part with at least the upper part open | released, 12 is a vent hole provided in the concave part 11a. Reference numeral 13 denotes a dustproof net provided in the vent hole 12. 14 is an aluminum piece made of aluminum. Reference numeral 15 denotes a shield case made of SPTE. Reference numeral 16 denotes a single-layer FPC. 17 is a copper foil sheet made of copper. Reference numeral 18 denotes a CCD. Reference numeral 20 denotes a prism unit that splits light into the CCD. Reference numeral 21 denotes a lens unit. A screw 22 attaches the aluminum piece to the shield case. A screw 23 fastens the prism 20, the copper foil sheet 17, and the shield case 15 together with the lens unit 21. Reference numeral 19 denotes a sub-housing containing a viewfinder, which is rotatably fitted in the concave portion 11a of the outer case 11.
[0014]
The CCD 18 is mounted on the FPC 16 together with other electronic components. The copper foil sheet 17 is affixed to the surface of one side of the FPC 16, and is located between the CCD 18 and the FPC 16 at the end face and is in close contact with the CCD 18. The CCD 18 is bonded to the prism 20 and further fixed to the lens portion 21 with screws. The shield case 15 is fixed with screws 23 so as to cover the CCD 18, the prism unit 20, and the FPC 16, and is configured to be fastened with a copper foil. One end face of the aluminum piece 14 is fixed to the shield case 15 with screws 22, and the other end face faces the ventilation hole 12 having the dustproof net 13 and is adjacent thereto.
[0015]
About the heat radiating device comprised as mentioned above, the operation | movement is demonstrated using FIGS. 1-4. First, when the power source of the electronic device main body is turned on, the CCD 18 generates heat. The generated heat is thermally conducted to the copper foil sheet 17 having flexibility and excellent thermal conductivity, and is conducted to the shield case 15 through the copper foil sheet 17. Further, the heat transmitted to the shield case 15 is conducted to the aluminum piece 14 having a high heat capacity. The heat transmitted to the aluminum piece 14 is radiated to the outside air through the vent hole 12 of the exterior part. Further, heat generated inside other electronic devices such as other P plates is also radiated from the vent holes.
[0016]
As described above, according to the present embodiment, the heat generated in the electronic components such as the CCD 18 is thermally conducted to the aluminum piece 14 through the copper foil sheet 17 and the shield case 15 provided for electromagnetic shielding, and the aluminum piece. The heat conducted up to 14 is also radiated and radiated from the air vent 12 to the outside air, so that the CCD 18 and the electronic parts do not become abnormally hot. Further, since the vent hole 12 is also in a portion where the hand on the exterior surface is difficult to touch, the user does not feel uncomfortable. In addition, because the vents are provided on the electrical equipment where it is difficult to touch the eyes, the design does not look strange.
[0017]
In the above-described embodiment, three CCDs 18 are provided, and the so-called three-plate movie camera in which the optical information incident from the lens unit 21 is split into three colors of RGB by the prism 20 and captured by the corresponding CCDs. However, the present invention is not limited to this, and a so-called single-plate movie camera having only one CCD is also applicable.
[0018]
Further, although the CCD is exemplified as the one that generates heat, for example, electronic components such as a driving integrated circuit and a power supply circuit that drive the CCD also generate heat, but can be similarly conducted through a copper foil sheet.
[0019]
【The invention's effect】
As described above, the present invention can efficiently dissipate heat from an internal heat source (an electronic component such as a CCD) to ensure stable performance and operation of an electronic device. Further, the original optical performance can be ensured without applying mechanical stress to precision parts such as the lens portion. In addition, since the heat radiating part is not touched directly by hand, it does not feel hot even when gripping the exterior part. An excellent effect that can be realized is obtained.
[Brief description of the drawings]
1 is a configuration diagram of a heat dissipation device according to Embodiment 1 of the present invention. FIG. 2 (a) is a detailed top view of the heat dissipation device according to Embodiment 1. FIG. 1 (b) is the same as that of the heat dissipation device according to Embodiment 1. Detailed side view FIG. 3 is a detailed view of the vent hole of the heat dissipation device in the first embodiment. FIG. 4 is a detailed view of the FPC heat transfer portion of the heat dissipation device in the first embodiment. FIG. Configuration diagram [Explanation of symbols]
11 Exterior case 11a Concave portion 12 Vent hole 13 Dust-proof net 14 Aluminum piece 15 Shield case 16 FPC
17 Copper foil sheet 18 CCD
19 Sub housing 20 Prism 21 Lens portion 22, 23 Screw

Claims (1)

At least one or more CCDs, a lens unit including the CCDs, at least an FPC on which the CCDs are mounted, a shield case that covers at least the CCDs and the FPCs and electromagnetically shields, and a part thereof is in close contact with the CCDs The copper foil sheet provided between the FPC and the CCD and provided so that another portion is in close contact with the shield case, the aluminum piece provided in close contact with the shield case, and the outer shape of the electronic device An exterior case to be formed; a vent hole spatially communicating between the inside and outside of the exterior case and provided at a position adjacent to the aluminum piece; and a concave-shaped concave portion that is a part of the exterior case and at least an upper part is open And a sub-housing accommodated in the concave portion and rotatably held, and the vent hole is formed in the front of the concave portion. Sub-housings radiating device, characterized in that provided in an invisible position by body.

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