JP5671865B2 - Enclosure - Google Patents

Description

  The present invention relates to a casing that covers a base member with a cover member so as to secure an accommodation space between them, and particularly to a waterproof structure of the casing.

  In a case of an electronic device that can be installed outdoors such as an inverter, a sealing means is generally interposed at a joint portion between a cover member and a base member in order to ensure waterproofness. As the sealing means, a gasket is disposed around the component mounting surface of the base member, and the base member and the cover member are joined in a watertight manner by pressing the opening edge of the cover member against the gasket. (For example, refer to Patent Document 1).

JP-A-9-252187

  By the way, in the case where a gasket is disposed on the component mounting surface of the base member, the mounting area of components such as electronic components is reduced by the amount of the gasket. Of course, it is possible to configure the base member while securing a desired mounting area for the parts. However, when a mounting area of a desired size is secured, the outer dimensions of the base member must be increased by that amount, and a gasket must be provided, and the housing cannot be increased in size. Absent. Of course, if the gasket width is set small, the reduction rate of the mounting area can be kept small. However, when the gasket width is set to be small, there is a risk that a water tightness between the base member and the cover member cannot be ensured due to the influence of molding errors and assembly errors.

  On the other hand, it is also conceivable to arrange a gasket at the opening edge of the cover member. However, in this case, since the plate thickness dimension of the opening edge of the cover member increases, the above problem cannot be solved.

  In view of the above circumstances, the present invention provides a housing capable of ensuring watertightness between a base member and a cover member and a component mounting area without incurring an increase in outer dimensions. Objective.

In order to achieve the above object, a housing according to the present invention has a base member having a component mounting portion for mounting a component on a component mounting surface and a sealing means interposed at a joint portion between the component mounting portion. A housing that includes a cover member that covers a space between the base member and the component member to ensure a space for accommodating a component; and the sealing means is an edge of the component mounting surface , When the base member is covered by the cover member, a gasket receiving groove having a portion opening at a position that is inward of the cover member, and the gasket receiving groove in a state where an outer surface is equal to or less than the component mounting surface And the cover member is formed in a portion corresponding to the gasket housing groove of the base member, and enters the gasket housing groove when the base member is covered. And by, characterized in that a projection piece portion for pressing the outer surface of the gasket.

  Further, according to the present invention, in the housing described above, the base member is provided with an outer edge wall portion at a portion located on the outer edge side of the gasket housing groove, while the cover member is provided with the outer edge wall portion of the base member. A wall housing groove for housing the wall housing groove is formed, and an inner edge wall portion located on the inner edge side of the wall housing groove is made to function as the protruding strip portion.

  Further, the present invention is characterized in that in the above-described housing, a deformation space portion that allows elastic deformation of the gasket when the protruding piece portion enters is secured in the gasket housing groove.

  Further, according to the present invention, in the housing described above, the outer edge wall portion of the base member is formed with a guide surface that gradually inclines toward the inner edge side as the distance from the component mounting surface is increased. Features.

  According to the present invention, the gasket housing groove is formed on the component mounting surface of the base member, and the gasket is disposed so that the outer surface is equal to or less than the component mounting surface. Thus, it is possible to secure a desired component mounting area without incurring an increase in outer dimensions.

FIG. 1 is a perspective view showing an external appearance of a housing according to an embodiment of the present invention. FIG. 2 is a cross-sectional perspective view showing an enlarged main part of the housing shown in FIG. FIG. 3 is an enlarged cross-sectional view showing a main part of the housing shown in FIG. 4 is a cross-sectional view sequentially illustrating a process of joining the base member and the cover member of the housing illustrated in FIG.

  Hereinafter, preferred embodiments of a casing according to the present invention will be described in detail with reference to the accompanying drawings.

  1 and 2 show a housing which is an embodiment of the present invention. The housing 1 illustrated here constitutes an electronic device such as an inverter by mounting various component parts P such as electronic components therein, and includes a base member 10 and a cover member 20.

  The base member 10 includes a rectangular plate-shaped component mounting plate portion (component mounting portion) 11 having an inner surface serving as a component mounting surface 11a, a conduit frame portion 12 provided at one end of the component mounting plate portion 11, and a component mounting plate. And a plurality of cooling fins 13 provided on the outer surface of the portion 11. The component mounting plate part 11 and the cooling fin 13 are integrally formed of a metal having a relatively large thermal conductivity such as aluminum or an aluminum alloy. The conduit frame portion 12 is a plate-like portion having a mounting hole 12a for inserting a conduit connector (not shown), and is directed from the inner surface of one end of the component mounting plate portion 11 to the side opposite to the cooling fin 13. It is provided so as to protrude. As is apparent from the figure, the conduit frame portion 12 is formed in a trapezoidal shape whose width gradually decreases as the distance from the component mounting plate portion 11 increases.

  The cover member 20 covers the inner surface of the base member 10 in a state where an accommodation space for accommodating the component P is secured between the cover member 20 and the base member 10. In the present embodiment, the cover member 20 is applied in which the reference wall portion 21, the end wall portion 22, and the pair of side wall portions 23, 23 are integrally formed by injection molding. The reference wall portion 21 is a portion arranged to face the component mounting plate portion 11 of the base member 10 and is formed in a rectangular shape having a slightly smaller width than the component mounting plate portion 11. The end wall portion 22 is a trapezoidal portion disposed to face the conduit frame portion 12 of the base member 10 and bends and extends from one end edge of the reference wall portion 21 toward the inner surface side of the reference wall portion 21. Exist. The pair of side wall portions 23, 23 are portions that are bent and extended from both side edges of the reference wall portion 21 toward the inner surface side of the reference wall portion 21. The pair of side wall portions 23, 23 extend so that the distance between the side wall portions 23, 23 gradually increases as the distance from the reference wall portion 21 increases. It is comprised so that it may become substantially the same width.

  As shown in FIGS. 2 and 3, a sealing means 30 is configured between the component mounting plate portion 11 of the base member 10 and the end wall portion 22 and the pair of side wall portions 23, 23 of the cover member 20. is there. The sealing means 30 is for securing watertightness between the component mounting plate portion 11 of the base member 10 and the end wall portion 22 and the pair of side wall portions 23, 23 of the cover member 20. 11 is provided with a gasket receiving groove 31 and an outer edge wall portion 32 on the component mounting surface 11a, and a wall receiving groove 33 is provided on the end wall portion 22 and the side wall portions 23 and 23.

  The gasket housing groove 31 is a series of recesses formed along the edge of the component mounting surface 11a, and has a gasket mounting portion 31a and a deformation space portion 31b. The gasket mounting portion 31a has a rectangular cross section and accommodates a gasket 34 therein as shown in FIGS. The gasket 34 has a rectangular cross section. When the gasket 34 is disposed in the gasket mounting portion 31a, the gasket 34 fits in the gasket mounting portion 31a in the width direction, while the outer surface 34a positioned above the component mounting surface 11a. The thing of the dimension located below is applied. The deformation space 31b is a recess formed at a position closer to the inner edge side than the gasket mounting portion 31a, and has a function of accommodating a deformed portion of the gasket 34 when the outer surface 34a of the gasket 34 is pressed. ing.

  The outer edge wall portion 32 is a series of protruding portions erected from a portion located on the outer edge side of the gasket housing groove 31 on the component mounting surface 11a. In the outer edge wall portion 32, a guide surface 32a is formed at a portion located on the outer edge side. The guide surface 32a is formed so as to gradually be positioned on the inner edge side as it is separated from the component mounting surface 11a.

  The wall housing groove 33 is a series of recesses located between the outer wall portion 33a and the inner wall portion (projection strip portion) 33b formed at the extended end portions of the end wall portion 22 and the side wall portions 23, 23, The outer edge wall portion 32 of the base member 10 is formed in a size that can be accommodated. As is apparent from the figure, the outer wall 33a constituting the wall housing groove 33 is configured to have a uniform plate thickness, while the inner wall 33b has the inner surface of the wall housing groove 33 facing the opening. The thickness is gradually inclined toward the inner edge, and the thickness is gradually reduced toward the extending end.

  Although not clearly shown in the drawing, another sealing means (not shown) is provided at the junction between the reference wall portion 21 and the side wall portions 23, 23 and the conduit frame portion 12. Water tightness is ensured.

  In the housing 1 configured as described above, as shown in FIG. 4, the extended end portion of the end wall portion 22 and the extended end portions of the pair of side wall portions 23 and 23 in the cover member 20 are respectively component mounting plate portions. By covering the base member 10 in a state where it is joined to the component 11, the inverter casing 1 in which the housing space for the component P is secured between the inner surface of the component mounting plate portion 11 is formed. During this time, due to dimensional errors when the cover member 20 is injection-molded, for example, even if the extended end portion of the side wall portion 23 is located on the inner edge side of the edge portion of the component mounting surface 11a, The outer wall portion 33a formed at the existing end portion is guided to the outer edge side by coming into contact with the guide surface 32a of the base member 10, and the outer edge wall portion 32 is reliably accommodated inside the wall accommodating groove 33. become.

  In the state where the outer edge wall portion 32 is housed in the wall housing groove 33, the gasket housing in which the end wall portion 22 and the inner wall portion 33b formed at the extending end portion of the side wall portions 23, 23 are formed on the component mounting surface 11a. Since it enters the groove 31 and the outer surface 34a of the gasket 34 is pressed by the tip of the inner wall portion 33b, water tightness between the end wall portion 22 and the side wall portions 23 and 23 and the component mounting plate portion 11 is ensured. . In addition, the gasket 34 whose outer surface 34a is pressed is elastically deformed in such a manner that the outer surface 34a does not protrude from the component mounting surface 11a and bulges into the deformation space 31b of the gasket housing groove 31. Become. Therefore, in the case 1 to which the sealing means 30 described above is applied, it is possible to include the region facing the outer surface 34a of the gasket 34 as the mounting region of the component P as indicated by the two-dot chain line in FIG. It is. As a result, it is possible to secure a desired mounting area for the component P without increasing the external dimensions of the component mounting plate portion 11.

  In addition, in the housing 1, even when a large width of the gasket 34 is ensured, the mounting area of the component P is not affected. Therefore, even if a molding error or an assembly error occurs, the gasket 34 is reliably pressed by the end wall portion 22 and the side wall portions 23 and 23, and the water tightness between the base member 10 and the cover member 20 is ensured. It is possible.

  In the above-described embodiment, the housing 1 of the electronic device is illustrated, but the electronic device is not necessarily required. Further, although the base member 10 is illustrated as having the conduit frame portion 12, the base member 10 does not need to include the conduit frame portion 12 as long as it has the component mounting surface 11 a.

  Further, in the above-described embodiment, the gasket 34 is disposed so that the outer surface 34a of the gasket 34 is lower than the component mounting surface 11a. You may arrange | position so that an outer surface may become the same plane as a component mounting surface.

DESCRIPTION OF SYMBOLS 1 Housing | casing 10 Base member 11 Component mounting board part 11a Component mounting surface 20 Cover member 22 End wall part 23 Side wall part 30 Sealing means 31 Gasket accommodation groove 31b Deformation space part 32 Outer edge wall part 32a Guide surface 33 Wall accommodation groove 33a Outer wall Part 33b Inner wall part 34 Gasket 34a Outer surface P Parts

Claims (4)

A base member having a component mounting portion for mounting the component on the component mounting surface;
A cover member that covers the base member in a state where a sealing means is interposed at a joint portion with the component mounting portion, and secures a component accommodation space between the base member and the base member. ,
The sealing means includes
A gasket receiving groove having a portion that is an edge of the component mounting surface and that opens to a position that is inward of the cover member when the base member is covered by the cover member;
A gasket disposed inside the gasket receiving groove in a state where an outer surface is located below the component mounting surface;
A protruding strip portion that presses the outer surface of the gasket by forming the cover member in a portion corresponding to the gasket receiving groove of the base member and entering the gasket receiving groove when the base member is covered; A housing characterized by comprising:   The base member is provided with an outer edge wall portion at a portion located on the outer edge side of the gasket receiving groove, while the cover member is formed with a wall receiving groove for receiving the outer edge wall portion of the base member, and the wall The housing according to claim 1, wherein an inner edge wall portion located on an inner edge side of the housing groove functions as the protruding piece portion.   The casing according to claim 1 or 2, wherein a space for deformation that allows elastic deformation of the gasket when the protruding piece portion enters is secured in the gasket receiving groove. The guide surface which inclines to the inner edge side gradually as the distance from the said component mounting surface is formed in the site | part located in the outer edge side in the outer edge wall part of the said base member is any one of the Claims 1-3 characterized by the above-mentioned. The housing as described in one.

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