JP7430117B2 - electrical equipment - Google Patents

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JP7430117B2
JP7430117B2 JP2020120903A JP2020120903A JP7430117B2 JP 7430117 B2 JP7430117 B2 JP 7430117B2 JP 2020120903 A JP2020120903 A JP 2020120903A JP 2020120903 A JP2020120903 A JP 2020120903A JP 7430117 B2 JP7430117 B2 JP 7430117B2
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circuit board
elastic member
wall portion
case
electrical device
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JP2022017991A (en
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隆之介 松本
一人 岡崎
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Kubota Corp
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Kubota Corp
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Description

本発明は電気装置に関し、具体的には、該電気装置の振動抑制構造に関する。 BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrical device, and specifically relates to a vibration suppressing structure for the electrical device.

電気装置は、外部からの粉塵などの侵入による不具合を防止するために、回路基板をケースに収容することが一般的である。例えば、車載用電気装置のように、ケースが外力によって振動する場合、回路基板にも振動が伝播し、回路基板の不具合の原因になる。そのため、回路基板の振動を抑制するために、回路基板とケースとの間に、例えばスポンジのような弾性部材を設けることが多い。 BACKGROUND OF THE INVENTION In electrical devices, circuit boards are generally housed in cases to prevent problems caused by intrusion of dust and the like from the outside. For example, when the case of an in-vehicle electrical device vibrates due to external force, the vibration propagates to the circuit board, causing a malfunction of the circuit board. Therefore, in order to suppress the vibration of the circuit board, an elastic member such as a sponge is often provided between the circuit board and the case.

特開２０１１－０３３９０９号公報Japanese Patent Application Publication No. 2011-033909

しかしながら、上述のような従来技術は、経年の振動によって弾性部材が摩耗し、ケース内部で塵埃が発生する可能性が考えられる。そして、当該塵埃が回路基板に付着することにより、回路基板に何らかの不具合が発生する可能性が考えられる。 However, in the conventional technology as described above, there is a possibility that the elastic member is worn out due to vibration over time and dust is generated inside the case. When the dust adheres to the circuit board, there is a possibility that some kind of malfunction will occur in the circuit board.

そこで、本発明の一態様は、回路基板の振動を抑制でき、かつ、ケース内の塵埃が回路基板に付着することを防止できる電気装置を実現することを目的とする。 SUMMARY OF THE INVENTION Therefore, an object of one aspect of the present invention is to realize an electrical device that can suppress vibration of a circuit board and prevent dust in a case from adhering to the circuit board.

上記の課題を解決するために、本発明の一態様に係る電気装置は、回路基板と、前記回路基板を収容したケースと、前記回路基板の少なくとも一部を覆う第１カバーと、前記第１カバーと前記ケースとの間に挟まれた弾性部材と、を備える。 In order to solve the above problems, an electric device according to one aspect of the present invention includes a circuit board, a case housing the circuit board, a first cover that covers at least a portion of the circuit board, and a first cover that covers at least a portion of the circuit board. An elastic member is provided between the cover and the case.

上記の構成によれば、回路基板とケースとの間に弾性部材が挟まれているので、前記回路基板の振動を抑制できる。また、前記回路基板の少なくとも一部を覆う第１カバーを前記回路基板と前記弾性部材との間に設けている。これにより、前記弾性部材における前記回路基板側の面の摩耗により生じた塵埃は、前記第１カバーが存在することにより、前記回路基板に付着することを防止できる。 According to the above configuration, since the elastic member is sandwiched between the circuit board and the case, vibration of the circuit board can be suppressed. Further, a first cover that covers at least a portion of the circuit board is provided between the circuit board and the elastic member. Thereby, dust generated due to abrasion of the surface of the elastic member on the circuit board side can be prevented from adhering to the circuit board due to the presence of the first cover.

本態様に係る電気装置では、前記第１カバーは、前記弾性部材を囲む第１壁部を備えてもよい。この場合、前記第１壁部により前記塵埃が周囲に拡散することを防止できる。その結果、当該塵埃の拡散により前記ケース内の部品に不具合が発生することを防止できる。 In the electrical device according to this aspect, the first cover may include a first wall portion surrounding the elastic member. In this case, the first wall can prevent the dust from spreading to the surroundings. As a result, it is possible to prevent defects from occurring in parts within the case due to the diffusion of the dust.

本態様に係る電気装置は、前記弾性部材における前記ケース側の面を少なくとも覆う第２カバーをさらに備え、前記第２カバーは、前記弾性部材を囲む第２壁部を備えてもよい。この場合、前記弾性部材の前記ケース側の面の摩耗により生じた塵埃は、前記第２壁部により周囲に拡散することを防止できる。その結果、当該塵埃の拡散により前記ケース内の部品に不具合が発生することを防止できる。 The electrical device according to this aspect may further include a second cover that covers at least a surface of the elastic member on the case side, and the second cover may include a second wall portion that surrounds the elastic member. In this case, dust generated due to wear of the case-side surface of the elastic member can be prevented from spreading to the surroundings by the second wall. As a result, it is possible to prevent defects from occurring in parts within the case due to the diffusion of the dust.

本態様に係る電気装置では、前記第１壁部および前記第２壁部の一方は、他方よりも前記弾性部材に近い側に設けられていてもよい。この場合、振動により前記弾性部材が圧縮されても、前記第１壁部と前記第２壁部とが衝突することを回避することができる。 In the electrical device according to this aspect, one of the first wall portion and the second wall portion may be provided closer to the elastic member than the other. In this case, even if the elastic member is compressed by vibration, it is possible to avoid collision between the first wall portion and the second wall portion.

本態様に係る電気装置では、前記第１壁部と前記第２壁部とは、一部の側面どうしが対向していてもよい。この場合、前記第１壁部と前記第２壁部とは一部が重なり合うことになる。その結果、前記弾性部材からの塵埃が周囲に拡散することを確実に防止できる。 In the electrical device according to this aspect, some side surfaces of the first wall portion and the second wall portion may face each other. In this case, the first wall portion and the second wall portion partially overlap. As a result, it is possible to reliably prevent dust from the elastic member from spreading to the surroundings.

本態様に係る電気装置では、前記弾性部材は、前記回路基板の上方に設けられてもよい。この場合、前記弾性部材からの塵埃は、前記第１カバー上に落下するので、前記回路基板に付着することを防止できる。また、前記第１壁部よりも前記第２壁部の方が前記弾性部材に近い側に設けられている場合、前記弾性部材の前記ケース側の面（上面）から発生した塵埃は、前記第１カバー上に確実に落下させることができる。これにより、前記塵埃が前記回路基板に付着することを確実に防止できる。 In the electrical device according to this aspect, the elastic member may be provided above the circuit board. In this case, since dust from the elastic member falls onto the first cover, it can be prevented from adhering to the circuit board. Further, when the second wall portion is provided closer to the elastic member than the first wall portion, dust generated from the case-side surface (upper surface) of the elastic member is removed from the second wall portion. 1 cover can be dropped reliably. Thereby, it is possible to reliably prevent the dust from adhering to the circuit board.

本態様に係る電気装置では、前記弾性部材が無い場合に前記回路基板の振動が最大となる位置に前記弾性部材が少なくとも設けられてもよい。この場合、前記回路基板の振動を効率的に抑制することができる。 In the electrical device according to this aspect, the elastic member may be provided at least at a position where vibration of the circuit board would be maximum in the absence of the elastic member. In this case, vibration of the circuit board can be efficiently suppressed.

本発明の一態様によれば、回路基板の振動を抑制でき、かつ、ケース内の塵埃が回路基板に付着することを防止できる。 According to one aspect of the present invention, vibration of the circuit board can be suppressed, and dust in the case can be prevented from adhering to the circuit board.

本発明の一実施形態に係る電気装置を示す断面図である。FIG. 1 is a cross-sectional view showing an electrical device according to an embodiment of the present invention. 上記電気装置を示す組立図である。It is an assembly diagram showing the above-mentioned electric device. 本発明の他の実施形態に係る電気装置を示す断面図である。FIG. 3 is a cross-sectional view of an electrical device according to another embodiment of the invention.

以下、本発明の実施の形態について、詳細に説明する。なお、説明の便宜上、各実施形態に示した部材と同一の機能を有する部材については、同一の符号を付記し、適宜その説明を省略する。 Embodiments of the present invention will be described in detail below. For convenience of explanation, members having the same functions as the members shown in each embodiment are denoted by the same reference numerals, and the description thereof will be omitted as appropriate.

〔実施形態１〕
本発明の一実施形態について、図１・図２を参照して説明する。 [Embodiment 1]
An embodiment of the present invention will be described with reference to FIGS. 1 and 2.

（電気装置１の構成）
図１は、本実施形態に係る電気装置１を示す断面図である。本実施形態の電気装置１は、例えば、電動トラクタ、バックホーなどの作業機に搭載される車載用電気装置に好適である。 (Configuration of electrical device 1)
FIG. 1 is a sectional view showing an electrical device 1 according to this embodiment. The electrical device 1 of this embodiment is suitable for use as an on-vehicle electrical device mounted on a working machine such as an electric tractor or a backhoe.

図１に示すように、電気装置１は、ケース底部１１ａ（ケース）、ケース蓋部１１ｂ（ケース）、基板取付板１２、回路基板１３、下カバー２１（第１カバー）、弾性部材２２、および上カバー２３（第２カバー）を備える。基板取付板１２と、回路基板１３と、下カバー２１と、弾性部材２２と、上カバー２３とは、ケース底部１１ａおよびケース蓋部１１ｂを備えるケースに収容される。 As shown in FIG. 1, the electrical device 1 includes a case bottom 11a (case), a case lid 11b (case), a board mounting plate 12, a circuit board 13, a lower cover 21 (first cover), an elastic member 22, and An upper cover 23 (second cover) is provided. The board mounting plate 12, the circuit board 13, the lower cover 21, the elastic member 22, and the upper cover 23 are housed in a case including a case bottom 11a and a case lid 11b.

電気装置１は、任意の回路基板１３の振動を抑制する構造を有しており、このような回路基板１３の例としては、車載用電力変換装置が挙げられる。回路基板１３の種類は特にこれに限定されず、任意の回路基板１３であってよい。 The electrical device 1 has a structure that suppresses vibrations of an arbitrary circuit board 13, and an example of such a circuit board 13 is a vehicle-mounted power converter. The type of circuit board 13 is not particularly limited to this, and any circuit board 13 may be used.

ケース底部１１ａは、例えば金属で形成され、一面が開放された箱体の底部であってもよい。ケース底部１１ａには、ボス１１１が設けられ、該ボス１１１に基板取付板１２をネジにて取り付けできるようになっている。 The case bottom 11a may be, for example, the bottom of a box made of metal and open on one side. A boss 111 is provided on the case bottom 11a, and the board mounting plate 12 can be attached to the boss 111 with screws.

基板取付板１２は、回路基板１３が取り付けられるプレートであり、ケース底部１１ａに取り付けられる。基板取付板１２は、回路基板１３を取り付けるためのボス１２１を備える。なお、ボス１２１に限定されず、単なる取付穴が開いており、回路基板１３を取り付けできるようになっていてもよい。また、基板取付板１２を省略して、回路基板１３がケース底部１１ａに取り付けられてもよい。 The board mounting plate 12 is a plate to which the circuit board 13 is attached, and is attached to the case bottom 11a. The board mounting plate 12 includes a boss 121 for mounting the circuit board 13. Note that the hole is not limited to the boss 121, and may be a simple mounting hole to which the circuit board 13 can be mounted. Further, the circuit board 13 may be attached to the case bottom 11a without the board mounting plate 12.

回路基板１３は、電子回路用の配線および部品が施されたプリント基板である。回路基板１３は、基板取付板１２のボス１２１にネジにて取り付けられるようになっている。なお、回路基板１３はプレス加工により基板取付板１２に取り付けられてよい。 The circuit board 13 is a printed board on which wiring and components for an electronic circuit are provided. The circuit board 13 is attached to the boss 121 of the board mounting plate 12 with screws. Note that the circuit board 13 may be attached to the board mounting plate 12 by press working.

下カバー２１は、回路基板１３に両面テープなどで取り付けられる、樹脂などの絶縁性部材であり、底部２１１および第１壁部２１２を備える。底部２１１は、回路基板１３の少なくとも一部を覆う。第１壁部２１２は、底部２１１の縁部に垂直方向に設けられている。これにより、第１壁部２１２は、弾性部材２２を囲むように設けられることになる。なお、底部２１１の形状は丸型、四角型など様々な形をとることができ、限定されない。 The lower cover 21 is an insulating member made of resin or the like and is attached to the circuit board 13 with double-sided tape or the like, and includes a bottom portion 211 and a first wall portion 212 . Bottom portion 211 covers at least a portion of circuit board 13 . The first wall portion 212 is provided at the edge of the bottom portion 211 in a vertical direction. Thereby, the first wall portion 212 is provided so as to surround the elastic member 22. Note that the shape of the bottom portion 211 is not limited and can take various shapes such as a round shape and a square shape.

弾性部材２２は、下カバー２１または上カバー２３に対し取り付けられる絶縁性弾性体であり、例えばゴム材などであってもよい。また、電気装置１を組み立てた図１の状態において、弾性部材２２は、上カバー２３またはケース蓋部１１ｂと下カバー２１とによって圧縮されている。 The elastic member 22 is an insulating elastic body attached to the lower cover 21 or the upper cover 23, and may be made of, for example, a rubber material. Further, in the assembled state of the electric device 1 shown in FIG. 1, the elastic member 22 is compressed by the upper cover 23 or the case lid 11b and the lower cover 21.

上カバー２３は、ケース蓋部１１ｂに両面テープなどで取り付けられる、樹脂などの絶縁性部材であり、頂部２３１および第２壁部２３２を備える。頂部２３１は、弾性部材２２の上面を少なくとも覆う。第２壁部２３２は、頂部２３１の縁部に垂直方向に設けられている。これにより、第２壁部２３２は、弾性部材２２の周囲に設けられることになる。上カバー２３は、下カバー２１の上方に設けられる。なお、頂部２３１の形状は丸型、四角型など様々な形をとることができ、限定されない。 The upper cover 23 is an insulating member made of resin or the like and is attached to the case lid portion 11b with double-sided tape or the like, and includes a top portion 231 and a second wall portion 232. The top portion 231 covers at least the upper surface of the elastic member 22 . The second wall portion 232 is provided at the edge of the top portion 231 in a vertical direction. Thereby, the second wall portion 232 is provided around the elastic member 22. The upper cover 23 is provided above the lower cover 21. Note that the shape of the top portion 231 is not limited and can take various shapes such as a round shape and a square shape.

また、第２壁部２３２は、第１壁部２１２よりも内側（弾性部材２２に近い側）である。また、電気装置１を組み立てた図１の状態において、第２壁部２３２および第１壁部２１２は、一部が重なり合っている。換言すれば、第２壁部２３２と第１壁部２１２とは、一部の側面どうしが対向している。 Further, the second wall portion 232 is located inside the first wall portion 212 (on the side closer to the elastic member 22). Further, in the assembled state of the electric device 1 shown in FIG. 1, the second wall portion 232 and the first wall portion 212 partially overlap. In other words, the second wall portion 232 and the first wall portion 212 face each other at some side surfaces.

（電気装置１の作用効果）
上記構成の電気装置１において、ケース底部１１ａおよびケース蓋部１１ｂを備えるケースに上下方向の振動が外部から加わると、該ケースに収容された回路基板１３も上下方向に振動する。このとき、回路基板１３およびケース蓋部１１ｂの間に弾性部材２２が挟まれているので、弾性部材２２が緩衝材として機能し、回路基板１３の振動を抑制できる。 (Function and effect of electric device 1)
In the electrical device 1 having the above configuration, when a vertical vibration is applied from the outside to the case including the case bottom 11a and the case lid 11b, the circuit board 13 housed in the case also vibrates in the vertical direction. At this time, since the elastic member 22 is sandwiched between the circuit board 13 and the case lid portion 11b, the elastic member 22 functions as a buffer material, and vibrations of the circuit board 13 can be suppressed.

また、回路基板１３の少なくとも一部を覆う下カバー２１を回路基板１３と弾性部材２２との間に設けている。これにより、弾性部材２２の下面（回路基板１３側の面）の摩耗により生じた塵埃は、下カバー２１が存在することにより、回路基板１３に付着することを防止できる。 Further, a lower cover 21 that covers at least a portion of the circuit board 13 is provided between the circuit board 13 and the elastic member 22. Thereby, the presence of the lower cover 21 can prevent dust generated due to wear of the lower surface (the surface on the circuit board 13 side) of the elastic member 22 from adhering to the circuit board 13 .

また、弾性部材２２を囲む第１壁部２１２により上記塵埃が周囲に拡散することを防止できる。その結果、当該塵埃の拡散により上記ケース内の部品に不具合が発生することを防止できる。また、弾性部材２２の上面（ケース蓋部１１ｂ側の面）の摩耗により生じた塵埃は、第２壁部２３２により周囲に拡散することを防止できる。その結果、当該塵埃の拡散により上記ケース内の部品に不具合が発生することを防止できる。 Further, the first wall portion 212 surrounding the elastic member 22 can prevent the dust from spreading to the surroundings. As a result, it is possible to prevent defects from occurring in the components inside the case due to the diffusion of the dust. Further, the second wall portion 232 can prevent dust generated due to wear of the upper surface of the elastic member 22 (the surface on the case lid portion 11b side) from diffusing to the surroundings. As a result, it is possible to prevent defects from occurring in the components inside the case due to the diffusion of the dust.

なお、電気装置１に左右振動が加わると、第１壁部２１２および第２壁部２３２が弾性部材２２と擦れあい、塵埃を発生させる場合が考えられる。しかしながら、当該塵埃は、第１壁部２１２および第２壁部２３２により周囲に拡散することを防止できる。 Note that when left-right vibration is applied to the electrical device 1, the first wall portion 212 and the second wall portion 232 may rub against the elastic member 22, generating dust. However, the first wall portion 212 and the second wall portion 232 can prevent the dust from spreading to the surroundings.

また、第１壁部２１２よりも第２壁部２３２の方が内側（弾性部材２２に近い側）に設けられているので、振動により弾性部材２２が圧縮されても、第１壁部２１２と第２壁部２３２とが衝突することを回避することができる。また、第１壁部２１２と第２壁部２３２とは、一部が重なり合っているので、弾性部材２２からの塵埃が周囲に拡散することを確実に防止できる。 Further, since the second wall portion 232 is provided on the inner side (closer to the elastic member 22) than the first wall portion 212, even if the elastic member 22 is compressed due to vibration, the first wall portion 212 Collision with the second wall portion 232 can be avoided. Further, since the first wall portion 212 and the second wall portion 232 partially overlap, it is possible to reliably prevent dust from the elastic member 22 from spreading to the surroundings.

また、弾性部材２２は、回路基板１３の上方に設けられているので、弾性部材２２からの塵埃は、下カバー２１上に落下する。従って、上記塵埃が回路基板１３に付着することを防止できる。また、第１壁部２１２よりも第２壁部２３２の方が内側に設けられているので、弾性部材２２の上面から発生した塵埃は、下カバー２１上に確実に落下させることができる。これにより、上記塵埃が回路基板１３に付着することを確実に防止できる。 Further, since the elastic member 22 is provided above the circuit board 13, dust from the elastic member 22 falls onto the lower cover 21. Therefore, the dust can be prevented from adhering to the circuit board 13. Further, since the second wall portion 232 is provided inside the first wall portion 212, dust generated from the upper surface of the elastic member 22 can be reliably dropped onto the lower cover 21. Thereby, it is possible to reliably prevent the dust from adhering to the circuit board 13.

（電気装置１の組立方法）
図２は、本実施形態に係る電気装置１を示す組立図である。 (Method of assembling electrical device 1)
FIG. 2 is an assembly diagram showing the electrical device 1 according to this embodiment.

まず、図示しないケース底部１１ａに、基板取付板１２を固定する。固定にあたっては、ケース底部１１ａのボスに基板取付板１２をネジにて締結すればよい。次に、基板取付板１２上に、回路基板１３を固定する。固定にあたっては、基板取付板１２のボスに回路基板１３をネジにて締結すればよい。なお、基板取付板１２上に、回路基板１３を固定した後、基板取付板１２をケース底部１１ａに固定してもよい。 First, the board mounting plate 12 is fixed to the case bottom 11a (not shown). For fixing, the board mounting plate 12 may be fastened to the boss of the case bottom 11a with screws. Next, the circuit board 13 is fixed onto the board mounting plate 12. For fixing, the circuit board 13 may be fastened to the boss of the board mounting plate 12 with screws. Note that after the circuit board 13 is fixed on the board mounting plate 12, the board mounting plate 12 may be fixed to the case bottom 11a.

次に、回路基板１３上に下カバー２１を両面テープまたは接着剤により固定する。また、ケース蓋部１１ｂに上カバー２３を両面テープまたは接着剤により固定する。このとき、上カバー２３は、ケース底部１１ａにケース蓋部１１ｂを重ねたときに、下カバー２１および弾性部材２２との隙間に勘合するように位置が調整される。 Next, the lower cover 21 is fixed onto the circuit board 13 with double-sided tape or adhesive. Further, the upper cover 23 is fixed to the case lid portion 11b with double-sided tape or adhesive. At this time, the position of the upper cover 23 is adjusted so that it fits into the gap between the lower cover 21 and the elastic member 22 when the case lid 11b is stacked on the case bottom 11a.

次に、弾性部材２２を下カバー２１に対し、両面テープまたは接着剤により固定する。次に、ケース底部１１ａにケース蓋部１１ｂを重ねる。このとき、上カバー２３は、下カバー２１および弾性部材２２との隙間に勘合する。そして、ケース蓋部１１ｂをケース底部１１ａに固定する。このとき、弾性部材２２は底部２１１および頂部２３１を介して、回路基板１３およびケース蓋部１１ｂによって圧縮される。 Next, the elastic member 22 is fixed to the lower cover 21 with double-sided tape or adhesive. Next, the case lid portion 11b is placed on the case bottom portion 11a. At this time, the upper cover 23 fits into the gap between the lower cover 21 and the elastic member 22. Then, the case lid portion 11b is fixed to the case bottom portion 11a. At this time, the elastic member 22 is compressed by the circuit board 13 and the case lid part 11b via the bottom part 211 and the top part 231.

なお、別の組立方法として、弾性部材２２を下カバー２１に固定する代わりに、上カバー２３に固定してもよい。この場合、上カバー２３は、ケース底部１１ａにケース蓋部１１ｂを重ねたときに、下カバー２１に勘合するように位置が調整されればよく、組立てが容易となる。 Note that as another assembly method, the elastic member 22 may be fixed to the upper cover 23 instead of being fixed to the lower cover 21. In this case, the upper cover 23 only needs to be adjusted in position so that it fits into the lower cover 21 when the case lid 11b is stacked on the case bottom 11a, and assembly becomes easy.

また、弾性部材２２は、図１に示すように１個であってもよいし、図２に示すように複数個であってもよい。また、弾性部材２２が無い場合に回路基板１３の振動が最大となる位置（腹の位置）に弾性部材２２が少なくとも設けられていてもよい。
もよい。この場合、回路基板１３の振動を効率的に抑制することができる。例えば、回路基板１３の四隅を基板取付板１２に固定している場合では、回路基板１３の中央が上記腹の位置に該当する。また、回路基板１３の四隅および中央を基板取付板１２に固定している場合では、図２に示す弾性部材２２の位置が上記腹の位置に該当する。 Moreover, the number of elastic members 22 may be one as shown in FIG. 1, or may be plural as shown in FIG. Furthermore, the elastic member 22 may be provided at least at a position (an antinode position) where the vibration of the circuit board 13 would be maximum in the absence of the elastic member 22.
Good too. In this case, vibration of the circuit board 13 can be efficiently suppressed. For example, when the four corners of the circuit board 13 are fixed to the board mounting plate 12, the center of the circuit board 13 corresponds to the above-mentioned center position. Further, in the case where the four corners and the center of the circuit board 13 are fixed to the board mounting plate 12, the position of the elastic member 22 shown in FIG. 2 corresponds to the above-mentioned center position.

（付記事項）
なお、下カバー２１および上カバー２３は、弾性部材２２に比べて摩耗し難い材料であることが好ましい。 (Additional notes)
Note that the lower cover 21 and the upper cover 23 are preferably made of a material that is less likely to wear than the elastic member 22.

また、電気装置１は、図１に示す上下方向を逆にして利用してもよいし、図１に示す上下方向を左右方向にして利用してもよい。この場合でも、弾性部材２２から生じる塵埃は第１壁部２１２および第２壁部２３２により、周囲に拡散することを防止できる。 Further, the electric device 1 may be used with the up-down direction shown in FIG. 1 reversed, or may be used with the up-down direction shown in FIG. 1 turned into the left-right direction. Even in this case, the first wall portion 212 and the second wall portion 232 can prevent dust generated from the elastic member 22 from spreading to the surroundings.

また、第１壁部２１２の方が第２壁部２３２よりも内側（弾性部材２２に近い側）に設けられていてもよい。すなわち、第１壁部２１２および第２壁部２３２の一方が他方よりも内側（弾性部材２２に近い側）に設けられていてもよい。 Further, the first wall portion 212 may be provided inside the second wall portion 232 (on the side closer to the elastic member 22). That is, one of the first wall portion 212 and the second wall portion 232 may be provided inside (closer to the elastic member 22) than the other.

〔実施形態２〕
本発明の他の実施形態について、図３を参照して説明する。 [Embodiment 2]
Another embodiment of the present invention will be described with reference to FIG.

図３は、本実施形態に係る電気装置２を示す断面図である。本実施形態の電気装置２は、図１・図２に示す電気装置１に比べて、上カバー２３が省略されている点と、下カバー２１に代えて下カバー２１ａが設けられている点とが異なり、その他の構成は同様である。 FIG. 3 is a sectional view showing the electrical device 2 according to this embodiment. The electrical device 2 of this embodiment differs from the electrical device 1 shown in FIGS. 1 and 2 in that the upper cover 23 is omitted and that the lower cover 21 is replaced by a lower cover 21a. are different, and the other configurations are the same.

下カバー２１ａは、回路基板１３に両面テープなどで取り付けられる樹脂などの絶縁性部材であり、底部２１１ａおよび第１壁部２１２ａを備える。下カバー２１ａは、図１・図２に示す下カバー２１に比べて、第１壁部２１２ａの先端部によって形成される開口部２１３ａが広がっている点が異なり、その他の構成は同様である。 The lower cover 21a is an insulating member made of resin or the like that is attached to the circuit board 13 with double-sided tape or the like, and includes a bottom portion 211a and a first wall portion 212a. The lower cover 21a is different from the lower cover 21 shown in FIGS. 1 and 2 in that the opening 213a formed by the tip of the first wall 212a is wider, and the other configurations are the same.

上記の構成によると、上カバー２３が無くても、弾性部材２２の上面および上部側面から生じた塵埃を下カバー２１ａにて収容することができる。その結果、部品点数を減らすことができる。なお、開口部２１３ａの大きさは、上記塵埃を下カバー２１ａにて収容できる程度の大きさであればよい。 According to the above configuration, even without the upper cover 23, dust generated from the upper surface and upper side surface of the elastic member 22 can be contained in the lower cover 21a. As a result, the number of parts can be reduced. The size of the opening 213a may be large enough to accommodate the dust in the lower cover 21a.

〔付記事項〕
本発明は上述した各実施形態に限定されるものではなく、請求項に示した範囲で種々の変更が可能であり、異なる実施形態にそれぞれ開示された技術的手段を適宜組み合わせて得られる実施形態についても本発明の技術的範囲に含まれる。 [Additional notes]
The present invention is not limited to the embodiments described above, and various modifications can be made within the scope of the claims, and embodiments obtained by appropriately combining technical means disclosed in different embodiments. are also included within the technical scope of the present invention.

１、２ 電気装置
１１ａ ケース底部（ケース）
１１ｂ ケース蓋部（ケース）
１２ 基板取付板
１３ 回路基板
２１、２１ａ 下カバー（第１カバー）
２２ 弾性部材
２３ 上カバー（第２カバー）
１１１、１２１ ボス
２１１、２１１ａ 底部
２１２、２１２ａ 第１壁部
２１３ａ 開口部
２３１ 頂部
２３２ 第２壁部 1, 2 Electrical device 11a Case bottom (case)
11b Case lid (case)
12 Board mounting plate 13 Circuit board 21, 21a Lower cover (first cover)
22 Elastic member 23 Upper cover (second cover)
111, 121 Boss 211, 211a Bottom 212, 212a First wall 213a Opening 231 Top 232 Second wall

Claims (6)

電気装置であって、
回路基板と、
前記回路基板を収容したケースと、
前記回路基板の少なくとも一部を覆う第１カバーと、
前記第１カバーと前記ケースとの間に挟まれた弾性部材と、を備え、
前記第１カバーは、前記弾性部材を囲む第１壁部を備え、
前記第１カバーと前記回路基板とは固定されており、
前記弾性部材は、前記回路基板および前記ケースによって圧縮されており、
前記弾性部材は、摩耗により塵埃が生じる、電気装置。 An electrical device,
a circuit board;
a case housing the circuit board;
a first cover that covers at least a portion of the circuit board;
an elastic member sandwiched between the first cover and the case ,
The first cover includes a first wall surrounding the elastic member,
the first cover and the circuit board are fixed;
the elastic member is compressed by the circuit board and the case;
An electrical device in which the elastic member generates dust due to wear . 前記弾性部材における前記ケース側の面を少なくとも覆う第２カバーをさらに備え、
前記第２カバーは、前記弾性部材を囲む第２壁部を備える請求項１に記載の電気装置。 further comprising a second cover that covers at least a surface of the elastic member on the case side,
The electrical device according to claim 1 , wherein the second cover includes a second wall surrounding the elastic member. 前記第１壁部および前記第２壁部の一方は、他方よりも前記弾性部材に近い側に設けられている、請求項２に記載の電気装置。 The electrical device according to claim 2 , wherein one of the first wall portion and the second wall portion is provided closer to the elastic member than the other wall portion. 前記第１壁部と前記第２壁部とは、一部の側面どうしが対向している、請求項３に記載の電気装置。 The electrical device according to claim 3 , wherein the first wall portion and the second wall portion face each other at some side surfaces. 前記弾性部材は、前記回路基板の上方に設けられている、請求項１から４の何れか１項に記載の電気装置。 The electrical device according to any one of claims 1 to 4 , wherein the elastic member is provided above the circuit board. 前記弾性部材が無い場合に前記回路基板の振動が最大となる位置に前記弾性部材が少なくとも設けられている、請求項１から５のいずれか１項に記載の電気装置。 The electrical device according to any one of claims 1 to 5 , wherein the elastic member is provided at least at a position where vibration of the circuit board would be maximum in the absence of the elastic member.
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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009075641A (en) 2007-09-18 2009-04-09 Japan Radio Co Ltd On-vehicle communication terminal device
JP2014203896A (en) 2013-04-02 2014-10-27 株式会社デンソー Electronic controller

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009075641A (en) 2007-09-18 2009-04-09 Japan Radio Co Ltd On-vehicle communication terminal device
JP2014203896A (en) 2013-04-02 2014-10-27 株式会社デンソー Electronic controller

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