JP2020008696A - Electronic apparatus - Google Patents
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Abstract
Description
本発明は、デジタルカメラやデジタルビデオカメラ等の電子機器に関し、特に放熱構造を持つ撮像装置に関する。 The present invention relates to electronic devices such as digital cameras and digital video cameras, and more particularly to an imaging device having a heat dissipation structure.
従来、デジタルカメラは静止画のみならず、動画撮影が可能となっている。さらに近年では、例えば4K動画のように、より高解像度の動画撮影が可能となっているが、同時にCPU等の制御基板上の素子への負荷が高くなり、従来以上に発熱が激しくなっている。そのため、デジタルカメラ本体の温度が高くなりユーザーが不快感を感じないように、撮影時間に制限を設けてデジタルカメラ本体の温度上昇を抑えるような制御がされているものがある。 2. Description of the Related Art Conventionally, digital cameras are capable of shooting not only still images but also moving images. Furthermore, in recent years, it has become possible to shoot a moving image with a higher resolution, for example, a 4K moving image, but at the same time, the load on an element on a control board such as a CPU is increased, and heat is generated more intensely than before. . Therefore, in order to prevent the user from feeling uncomfortable when the temperature of the digital camera main body becomes high, there is a control in which a photographing time is limited to suppress a rise in the temperature of the digital camera main body.
また、より効果的な放熱方法として、デジタルカメラ本体に通気孔を設けて内部を筒体で連通させ、発熱源からの熱を、前記筒体を通過する外部の空気に放熱するものが提案されている(特許文献1)。この提案では、発熱源からの熱をデジタルカメラ本体内部に広がる前に、前記筒体を通じて外気へと放熱している。そのため、デジタルカメラ本体内部のみで放熱対策を施した場合と比較してより高い放熱効果が見込め、さらに、通気孔を筒体によって連通しているため防塵性についても考慮されている。 Further, as a more effective heat radiation method, a method has been proposed in which a vent hole is provided in a digital camera body, the inside of the digital camera body is communicated with a cylinder, and heat from a heat source is radiated to external air passing through the cylinder. (Patent Document 1). In this proposal, heat from a heat source is radiated to the outside air through the cylindrical body before spreading inside the digital camera body. Therefore, a higher heat dissipation effect can be expected as compared with a case where heat dissipation measures are taken only inside the digital camera body, and further, dustproofness is considered because the ventilation holes are communicated with the cylindrical body.
そして、前記筒体の材質を、前記排気孔側を熱伝導率の高い材質、前記吸気側を熱伝導率の低い材質とし、前記排気孔と前記筒体との間に断熱材を配置することで前記吸気孔、及び前記排気孔周囲の温度が上がり過ぎないようにしている。そうすることにより、ユーザーが前記吸気孔、及び前記排気孔付近に触れても不快感を感じないようにしている。 Then, the material of the cylindrical body is such that the exhaust hole side is a material having high thermal conductivity and the intake side is a material having low thermal conductivity, and a heat insulating material is disposed between the exhaust hole and the cylindrical body. This prevents the temperature around the intake hole and the exhaust hole from rising too much. By doing so, the user does not feel discomfort even when touching the vicinity of the intake hole and the exhaust hole.
しかしながら、上記の特許文献1では、熱伝導率の高い前記筒体と、前記排気孔との間に断熱材を配置しているが、相応の厚みを確保しなければ、前記排気孔付近への熱を完全に断熱することは困難である。そのため、前記排気孔周囲にも熱が伝わり、ユーザーが不快感を感じる可能性がある。また、完全に断熱するため、デジタルカメラ本体の大きさを変えずに断熱材の厚みを厚くしていくと、前記筒体が短くなり、放熱効果が犠牲になってしまう。 However, in Patent Document 1 described above, a heat insulating material is arranged between the cylindrical body having a high thermal conductivity and the exhaust hole. However, if a suitable thickness is not ensured, the vicinity of the exhaust hole may be reduced. It is difficult to completely insulate heat. Therefore, heat is also transmitted around the exhaust hole, and the user may feel discomfort. Further, if the thickness of the heat insulating material is increased without changing the size of the digital camera body to completely insulate the heat, the cylindrical body is shortened, and the heat radiation effect is sacrificed.
本発明の目的は、本体を貫通する穴により高い放熱効果を持ち、排気孔付近へ熱が伝わりにくく、且つ防塵性を有する撮像装置を提供することにある。 An object of the present invention is to provide an imaging device having a high heat radiation effect by a hole penetrating a main body, hardly transmitting heat to the vicinity of an exhaust hole, and having a dustproof property.
上記の目的を達成するために、本発明に係る撮像装置は、
上面側に排気孔、及び下面側に吸気孔が設けられた本体外装と、発熱源となる電子部品が実装された基板と、前記吸気孔側に配置される中空の第1の筒状部材と、前記排気孔側に配置される中空の第2の筒状部材と、前記第1の筒状部材と前記第2の筒状部材との間に配置され、前記第1の筒状部材、及び前記第2の筒状部材の熱伝導率よりも高い材質からなる、中空の第3の筒状部材を備え、前記吸気孔、前記第1の筒状部材、前記3の筒状部材、前記第2の筒状部材、及び前記排気孔が連なることにより空気の流路ができるように構成され、前記第3の筒状部材に前記基板上の発熱源となる電子部品が熱接続されていることを特徴とする。
In order to achieve the above object, an imaging device according to the present invention includes:
A body exterior in which an exhaust hole is provided on an upper surface side, and an intake hole is provided on a lower surface side, a substrate on which an electronic component serving as a heat source is mounted, and a hollow first tubular member arranged on the intake hole side; A second hollow cylindrical member disposed on the exhaust port side, and the first cylindrical member disposed between the first cylindrical member and the second cylindrical member; and A hollow third cylindrical member made of a material having a higher thermal conductivity than the second cylindrical member, wherein the air intake hole, the first cylindrical member, the third cylindrical member, the third cylindrical member; The second cylindrical member and the exhaust hole are connected to form an air flow path, and an electronic component serving as a heat source on the substrate is thermally connected to the third cylindrical member. It is characterized by.
本発明によれば、本体を貫通する穴により高い放熱効果を持ち、排気孔付近へ熱が伝わりにくく、且つ防塵性を有する撮像装置を提供することができる。 According to the present invention, it is possible to provide an imaging device that has a high heat radiation effect due to the hole penetrating the main body, does not easily conduct heat to the vicinity of the exhaust hole, and has a dustproof property.
以下、本発明の実施の形態を図面に基づいて説明する。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
図1(a)、及び(b)は本実施例の一例である撮像装置1を正面側から見た斜視図、及び底面側から見た斜視図となっている。 FIGS. 1A and 1B are a perspective view and a perspective view of an imaging device 1 according to an embodiment of the present invention as viewed from the front and the bottom, respectively.
図1(a)に示すように、本実施例の撮像装置1は正面側に被写体像を形成するレンズ部2が設けられており、形成された被写体像は、不図示の撮像素子により電子データに変換される。後述する制御基板30上に実装されたCPU31が、前述の変換された電子データを不図示のメモリに保存し、撮像中の被写体像を後述の表示部6に表示する等、撮像装置としての様々な制御をする。特に、動画撮影中は前記制御を連続して行われることになるため、高解像度の動画を撮影すると、前記CPU31への負荷が高くなり、発熱量が顕著に上がることになる。それら前記撮像素子や制御基板30などの内部構造物は、外装カバー4により覆われ保護されている。 As shown in FIG. 1A, an imaging apparatus 1 of the present embodiment is provided with a lens unit 2 for forming a subject image on the front side, and the formed subject image is converted into electronic data by an image sensor (not shown). Is converted to A CPU 31 mounted on a control board 30 described below stores the converted electronic data in a memory (not shown) and displays a subject image being captured on a display unit 6 described later. Control. In particular, since the above-described control is continuously performed during moving image shooting, when a high-resolution moving image is shot, the load on the CPU 31 is increased, and the amount of heat generation is significantly increased. The internal structures such as the image sensor and the control board 30 are covered and protected by the outer cover 4.
撮像装置1の上面部には、排気孔11の開口部と、操作することで撮影動作を開始するレリーズボタン2が設けられている。さらに、回転させることにより、絞り値優先自動露出モード、シャッター速度優先自動露出モード、絞り値やシャッター速度をユーザーが設定するマニュアル露出モード、動画撮影モードといった撮影モードを切り替え可能なモードダイアル3が設けられている。 On the upper surface of the imaging device 1, an opening of the exhaust hole 11 and a release button 2 that starts a shooting operation by being operated are provided. Further, a mode dial 3 is provided which can be switched between a shooting mode such as an aperture-priority automatic exposure mode, a shutter speed-priority automatic exposure mode, a manual exposure mode in which a user sets an aperture value and a shutter speed, and a movie shooting mode by rotating. Have been.
図1(b)に示すように、撮像装置1の背面側には、押下することで、例えばメニュー画面や、再生モードへの切替え等、それぞれに割り当てられた機能を呼び出すことが可能となる操作ボタン7が設けられている。その隣には、表示部6が設けられており、上記のメニュー画面、及び再生モード時の画像や、その他様々な情報が表示される。前記操作ボタン7により、メニュー画面が選択され、前記表示部6にメニューの各項目が表示された際に、各項目を選択可能とする円環状の方向ボタン8が設けられている。そして、その内側には選択された項目を実行するための、決定ボタン9が設けられている。また、底面部には吸気孔10の開口部が設けられている。 As shown in FIG. 1B, on the back side of the imaging apparatus 1, an operation that allows the user to call a function assigned to each of them by pressing down, for example, a menu screen or switching to a playback mode. Button 7 is provided. A display unit 6 is provided next to the display unit, and displays the menu screen, the image in the reproduction mode, and other various information. When a menu screen is selected by the operation button 7 and each item of the menu is displayed on the display unit 6, an annular direction button 8 is provided to enable selection of each item. Further, a determination button 9 for executing the selected item is provided inside the selection button. An opening of the intake hole 10 is provided on the bottom surface.
図2は本実施例における、前述の筒状部材の分解斜視図であり、図3は筒状部材が前記外装カバー内に構成された状態の断面図である。 FIG. 2 is an exploded perspective view of the above-described tubular member in the present embodiment, and FIG. 3 is a cross-sectional view of a state where the tubular member is configured in the outer cover.
図2において、20、21、22はそれぞれ、第1の筒状部材、第2の筒状部材、及び第3の筒状部材であり、中空の筒状となっている。前記第1の筒状部材20の図中上面側には、内周壁側に凹形状20aが形成されている。同様に、前記第2の筒状形状21の図中下面側に、内周壁側に凹形状21aが形成されている。前記第3の筒状部材22の図中上下各側に、内周壁側に凸形状22aが形成されており、前記凹形状20a、及び前記凹形状21aがそれぞれ嵌合可能となっている。また、前記第1の筒状部材20は、前記第2の筒状部材21よりも短くなっている。 In FIG. 2, reference numerals 20, 21, and 22 denote a first tubular member, a second tubular member, and a third tubular member, respectively, which are hollow tubular. On the upper surface side of the first cylindrical member 20 in the drawing, a concave shape 20a is formed on the inner peripheral wall side. Similarly, a concave shape 21a is formed on the inner peripheral wall side on the lower surface side of the second cylindrical shape 21 in the drawing. A convex shape 22a is formed on the inner peripheral wall side on each of the upper and lower sides of the third cylindrical member 22 in the drawing, and the concave shape 20a and the concave shape 21a can be fitted respectively. The first tubular member 20 is shorter than the second tubular member 21.
前記第3の筒状部材22の材質は、例えばアルミや銅といった金属の様に、熱伝導率の高い材料が使用されている。前記第1の筒状部材20、及び前記第2の筒状部材21は、前記第3の筒状部材22よりも熱伝導率の低いものとなっており、例えば本発明ではPCのような樹脂材料としている。また、前記第1の筒状部材20、及び前記第2の筒状部材21は断熱材ではないため、前記第3の筒状部材22からある程度の熱が伝わる。 As a material of the third tubular member 22, a material having a high thermal conductivity such as a metal such as aluminum or copper is used. The first tubular member 20 and the second tubular member 21 have a lower thermal conductivity than the third tubular member 22. For example, in the present invention, a resin such as PC Material. Further, since the first tubular member 20 and the second tubular member 21 are not heat insulating materials, a certain amount of heat is transmitted from the third tubular member 22.
図3において、底面側の開口部である前記吸気孔10から、上面側の開口部である前記排気孔11へ向かって、前記第1の筒状部材20、前記第3の筒状部材22、及び前記前記第2の筒状部材21の順に配置されている。そのため、前記吸気孔10の開口部、前記第1の筒状部材20の中空部20b、前記第3の筒状部材22の中空部22b、前記第2の筒状部材21の中空部21b、及び前記排気孔11の開口部を、前記撮像装置1の外気が通り抜けることが可能となっている。また、前記第3の筒状部材22は前記撮像装置1の上下方向における略中央に位置しており、さらに、前記第1の筒状部材20が、前記第2の筒状部材21より短いため、前記第3の筒状部材22は略中央から下よりに位置することになる。 In FIG. 3, the first cylindrical member 20, the third cylindrical member 22, and the like from the intake hole 10, which is an opening on the bottom surface, to the exhaust hole 11, which is an opening on the top surface. And the second tubular member 21 in this order. Therefore, the opening of the intake hole 10, the hollow portion 20b of the first tubular member 20, the hollow portion 22b of the third tubular member 22, the hollow portion 21b of the second tubular member 21, and The outside air of the imaging device 1 can pass through the opening of the exhaust hole 11. Further, the third tubular member 22 is located substantially at the center in the vertical direction of the imaging device 1, and the first tubular member 20 is shorter than the second tubular member 21. The third cylindrical member 22 is located substantially below the center from below.
前述の制御基板30上に実装された前記CPU31上に、熱を他の部品へ伝える熱伝導ゴム32が配置され、さらに前記熱伝導ゴム32が前記第3の筒状部材22と接触している。そのため、前記CPU31で発生した熱が前記熱伝導ゴム32を通じて前記第3の筒状部材22へ伝わる。しかし、前記第1の筒状部材20、及び前記第2の筒状部材21は、前記第3の筒状部材22より熱伝導率が低いため、熱が伝わるものの前記第3の筒状部材22に比べて温度が低くなっている。 On the CPU 31 mounted on the control board 30 described above, a heat conductive rubber 32 for transmitting heat to other components is arranged, and the heat conductive rubber 32 is in contact with the third tubular member 22. . Therefore, the heat generated by the CPU 31 is transmitted to the third tubular member 22 through the heat conductive rubber 32. However, since the first tubular member 20 and the second tubular member 21 have a lower thermal conductivity than the third tubular member 22, heat is transmitted, but the third tubular member 22. The temperature is lower than.
前記第3の筒状部材22の温度が上がると、前記中空部22b内の空気の温度が上昇する。すると、前記中空部22b内の空気の密度が外部より低密度となり浮力が発生し、空気が上昇して前記排気孔11より排気される。それに伴い、前記中空部20b、21b、及び22b内の空気の圧力が、前記吸気孔10付近の外部の空気と比較して低くなり、圧力差が生じることにより、前記吸気孔10より外部の空気が吸気される。前記CPU31が発熱し続ける限り、上述の吸気、排気が連続して発生し続けることとなる。前記第1の筒状部材20は、撮像装置1の内部の熱がある程度伝わっているが、前記第3の筒状部材22が撮像装置1の略中央から下よりに位置しているため、前記吸気孔10から吸気された空気が前記中空部20bを通る時間が短くなる。そのため、前記吸気孔10から吸気された空気は、前記中空部20bからの放熱の影響が少なく、ほぼ外部の温度のまま前記中空部22bを通過することになり、前記中空部22bからの放熱が十分に行われる。 When the temperature of the third cylindrical member 22 increases, the temperature of the air in the hollow portion 22b increases. Then, the density of the air in the hollow portion 22 b becomes lower than that of the outside, so that buoyancy is generated, and the air rises and is exhausted from the exhaust hole 11. Accordingly, the pressure of the air in the hollow portions 20b, 21b, and 22b becomes lower than that of the external air near the intake hole 10, and a pressure difference is generated. Is sucked. As long as the CPU 31 continues to generate heat, the above-described intake and exhaust continue to be generated continuously. Although the heat inside the imaging device 1 is transmitted to a certain extent to the first tubular member 20, the third tubular member 22 is located substantially below the center of the imaging device 1 from below. The time when the air sucked from the air inlet 10 passes through the hollow portion 20b is shortened. Therefore, the air sucked from the suction hole 10 is less affected by the heat radiation from the hollow portion 20b and passes through the hollow portion 22b at almost the outside temperature. Well done.
上述により、本体内部の熱を前記第3の筒状部材22から、外気へと放熱可能となっており、さらに、前記第1の筒状部材20、及び前記第2の筒状部材21へも熱を伝えることにより、より広い範囲へ熱を拡散させている。 As described above, the heat inside the main body can be radiated from the third cylindrical member 22 to the outside air, and further, the first cylindrical member 20 and the second cylindrical member 21 are also radiated. By transmitting heat, heat is spread over a wider area.
そして、前記第1の筒状部材20b、及び前記第2の筒状部材21bは前記第3の筒状部材22より熱伝導率が低い材質であるため、前記第3の筒状部材22が直接前記外装カバー4に隣接している場合と比較して、前記吸気孔10、及び前記排気孔11周囲が熱くなることを防止している。また、前記吸気孔10から前記排気孔11まで、外部の空気が通過するが、前記第1の筒状部材20、前記第2の筒状部材21、及び前記第3の筒状部材22により撮像装置1本体内部とは独立した空間を形成しているため、内部へのゴミや水の侵入を防止している。さらに、前記第1の筒状部材20、前記第2の筒状部材21、前記第3の筒状部材22、前記吸気孔10、及び前記排気孔11の間に、不図示の弾性体を介在させることにより密封し、ゴミや水が撮像装置1の内部へ侵入することを確実に防止することも可能である。 Since the first tubular member 20b and the second tubular member 21b are made of a material having a lower thermal conductivity than the third tubular member 22, the third tubular member 22 is directly As compared with the case where the outer peripheral cover 4 is adjacent to the outer cover 4, the surroundings of the intake hole 10 and the exhaust hole 11 are prevented from becoming hot. External air passes from the intake hole 10 to the exhaust hole 11, but is imaged by the first tubular member 20, the second tubular member 21, and the third tubular member 22. Since a space independent of the inside of the main body of the device 1 is formed, entry of dust and water into the inside is prevented. Further, an elastic body (not shown) is interposed between the first cylindrical member 20, the second cylindrical member 21, the third cylindrical member 22, the intake hole 10, and the exhaust hole 11. By doing so, it is possible to seal and to surely prevent dust and water from entering the inside of the imaging device 1.
ここでは、発熱体として前記CPU31を例に挙げたが、その他の発熱する電気素子や、前記表示部6の発熱が問題であれば、それぞれの発熱体と前記第3の筒状部材22とを熱的に接続してもよい。 Here, the CPU 31 is taken as an example of the heating element. However, if other electric elements that generate heat or heat generation of the display unit 6 is a problem, each heating element and the third tubular member 22 are connected. The connection may be made thermally.
また、前記第3の筒状部材22の前記中空部22bに放熱性のよい塗装やコーティングを施し、放熱効果をより高めることも考えられる。 It is also conceivable that the hollow portion 22b of the third tubular member 22 is coated or coated with good heat dissipation to further enhance the heat dissipation effect.
さらに、不図示の高い冷却効果を持つ棒状の蓄熱部材を前記吸気孔10、又は前記排気孔11より挿入し、前記第3の筒状部材22の中空部22(b)と接することにより、外部の空気への放熱ではなく、直接撮像装置の熱を前記蓄熱部材へと伝えてもよい。それにより、炎天下の環境下などの外部の空気が熱い時でも冷却効果を得ることが可能となる。また、前記蓄熱部材を適時交換することにより、継続して撮像装置の熱を排出することが可能となる。 Further, a rod-shaped heat storage member having a high cooling effect (not shown) is inserted from the intake hole 10 or the exhaust hole 11 and is brought into contact with the hollow portion 22 (b) of the third tubular member 22, thereby providing an external device. Instead of radiating the heat to the air, the heat of the imaging device may be directly transmitted to the heat storage member. This makes it possible to obtain a cooling effect even when the external air is hot, such as in a hot environment. In addition, by exchanging the heat storage member at appropriate times, it is possible to continuously discharge the heat of the imaging device.
1 撮像装置、2 レンズ部、3 レリーズボタン、4 外装カバー、
5 モードダイアル、6 表示部、7 操作ボタン、8 方向ボタン、
9 決定ボタン、10 吸気孔、11 排気孔、20 第1の筒状部材、
20a 凸形状、20b 中空部、21 第2の筒状部材、21a 凹形状、
21b 中空部、22 第3の筒状部材、22a 凸形状、22b 中空部、
30 制御基板、31 CPU、32 熱伝導ゴム
1 imaging device, 2 lens unit, 3 release button, 4 outer cover,
5 mode dial, 6 display, 7 operation buttons, 8 direction buttons,
9 enter button, 10 intake hole, 11 exhaust hole, 20 first cylindrical member,
20a convex shape, 20b hollow portion, 21 second cylindrical member, 21a concave shape,
21b hollow portion, 22 third cylindrical member, 22a convex shape, 22b hollow portion,
30 control board, 31 CPU, 32 thermal conductive rubber
Claims (4)
発熱源となる電子部品(31)が実装された基板(30)と、
前記吸気孔(10)側に配置される中空の第1の筒状部材(20)と、
前記排気孔(11)側に配置される中空の第2の筒状部材(21)と、
前記第1の筒状部材(20)と前記第2の筒状部材(21)との間に配置され、前記第1の筒状部材(20)、及び前記第2の筒状部材(21)の熱伝導率よりも高い材質からなる、中空の第3の筒状部材(22)を備え、
前記吸気孔(10)、前記第1の筒状部材(20)、前記3の筒状部材(22)、前記第2の筒状部材(21)、及び前記排気孔(11)が連なることにより空気の流路ができるように構成され、前記第3の筒状部材(22)に前記基板(30)上の発熱源となる電子部品(31)が熱接続されていることを特徴とする撮像装置。 A body exterior (4) having an exhaust hole (11) on the upper surface side and an intake hole (10) on the lower surface side;
A substrate (30) on which an electronic component (31) serving as a heat source is mounted;
A first hollow cylindrical member (20) arranged on the side of the intake hole (10);
A second hollow cylindrical member (21) disposed on the exhaust hole (11) side;
The first tubular member (20) and the second tubular member (21) are disposed between the first tubular member (20) and the second tubular member (21). A hollow third cylindrical member (22) made of a material higher than the thermal conductivity of
The intake hole (10), the first tubular member (20), the third tubular member (22), the second tubular member (21), and the exhaust hole (11) are connected to each other. An electronic component (31) serving as a heat source on the substrate (30) is thermally connected to the third tubular member (22) so as to form an air flow path. apparatus.
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JP2018129198A JP2020008696A (en) | 2018-07-06 | 2018-07-06 | Electronic apparatus |
Applications Claiming Priority (1)
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JP2018129198A JP2020008696A (en) | 2018-07-06 | 2018-07-06 | Electronic apparatus |
Publications (1)
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JP2020008696A true JP2020008696A (en) | 2020-01-16 |
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JP2018129198A Pending JP2020008696A (en) | 2018-07-06 | 2018-07-06 | Electronic apparatus |
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