Cabinet of electrical apparatus and antenna apparatus

The present invention relates to a cabinet and an antenna device of an electric device, and more particularly to a cabinet and an antenna device having excellent water stopping property and airtightness.

In an electric device such as an antenna device, a circuit board is housed inside the cabinet, and the circuit board is supported in the cabinet. Some cabinets have a base and a cover assembled, the base is provided in a plate shape, the lower part of the cover opens, the cover covers the base, and the opening of the cover is closed by the base (for example). , Patent Document 1).

A screw joint is used to secure the cover to the base. That is, a female screw is formed on the inner surface of the cover, a through hole is formed in the base, a shaft portion of the male screw is passed through the through hole, and the shaft portion is screwed into the female screw (see, for example, Patent Document 1).

A rubber pad member is used to improve the airtightness and water-stopping property of the cabinet (see, for example, Patent Document 1). That is, a rubber pad member covers the outer peripheral portion from the lower surface of the base, and is fitted into the lower opening of the cover in a state where the pad member and the base are assembled. Since the outer peripheral portion of the pad member is sandwiched between the lower end of the inner surface of the cover and the outer peripheral portion of the base, the airtightness and water stopping property of the cabinet are improved.

When a pad member is used, the water-stopping and airtightness of the screw hole is maintained by the pad member (see, for example, Patent Document 1). That is, the shaft portion of the male screw is passed through the pad member and the base from the bottom to the top, the head portion of the male screw is caught on the lower surface of the pad member, and the shaft portion of the male screw is screwed into the female screw on the inner surface of the cover. By tightening the male screw, the pad member and the base are attracted to the cover side, and the pad member is sandwiched between the head of the male screw and the lower surface of the base, so that the watertightness and airtightness of the screw hole are maintained. Is done.<patcit num="1"><text>Japanese Patent Application Laid-Open No. 2005-102031</text></patcit>

<p> However, when the male screw is tightened, the head of the male screw is pressed against the pad member, and the pad member is compressed around the screw hole. When the pad member is deformed in this way, the force with which the base is attracted to the cover side is weakened. Therefore, the outer peripheral portion of the pad member is hardly compressed, the gap between the lower portion of the inner surface of the cover and the outer peripheral portion of the base is not filled, and the airtightness and water stopping property of that portion are deteriorated.</p><p> Therefore, the problem to be solved by the present invention is to make it possible to achieve both watertightness and airtightness in the hole through which the fastening portion such as a male screw penetrates and watertightness and airtightness in the gap between the cover and the base. Is.</p>

<p> In order to solve the above problems, according to one aspect of the present invention, a base, a cover that covers the base, and a lower end portion of the cover and the base that are placed on the upper surface of the base. A gasket sandwiched between them, a fastening portion that penetrates the base from the lower surface to the upper surface of the base, connects to the inside of the cover, and tightens the base so as to attract the cover side, and the gasket are integrally formed. A seal that surrounds the through hole through which the fastening portion penetrates on the upper surface of the base and a portion that connects the fastening portion and the cover are provided on the inner surface of the cover and pressed against the seal. A cabinet of electrical equipment is provided, characterized in that it comprises a hood.</p><p> According to another aspect of the present invention, a base, a cover overlying the base, a gasket placed on the upper surface of the base and sandwiched between the lower end of the cover and the base, and the like. A circuit board housed in an internal space surrounded by the base and the cover, the base is penetrated from the lower surface to the upper surface of the base, connected to the inside of the cover, and the base is attracted to the cover side. The cover is formed so as to surround the fastening portion to be tightened, the seal integrally formed with the gasket and the through hole through which the fastening portion is penetrated on the upper surface of the base, and the portion where the fastening portion and the cover are connected. Provided is an antenna device comprising a hood provided on the inner surface and pressed against the seal.</p><p> According to the above, since the gasket is sandwiched between the lower end portion of the cover and the base, it is possible to improve the water stopping property and airtightness in the gap between the cover and the base. Further, a seal is provided on the upper surface of the base so as to surround the through hole through which the fastening portion penetrates, a hood is provided so as to surround the connecting portion between the fastening portion and the cover, and the hood is pressed against the seal. Therefore, it is possible to improve the water stoppage and airtightness in the through hole of the fastening portion. Then, since the fastening portion is caught on the lower surface of the base and attracts the base to the cover side, both the gasket and the seal can be compressed with a strong force. Therefore, the water-stopping and airtightness in the through hole of the fastening portion is not lowered, and the water-stopping and airtightness in the gap between the cover and the base is not lowered. Further, since the gasket and the seal are integrally formed, if the gasket is set on the upper surface of the base at the time of assembly, the seal is also set, and the cost and time required for assembly can be reduced.</p><p> Preferably, the cabinet extends from the inner surface of the cover toward the through hole, further comprises a screwed portion surrounded by the hood, the fastening portion is a male screw, and the shaft portion of the male screw is the penetrating portion. While screwing into the screwed portion through the hole, the head of the male screw is caught on the lower surface of the base, and the opening of the through hole on the upper surface side of the base expands in a conical shape, and the screwed portion The tip of the screw enters the opening of the through hole on the upper surface side of the base and abuts on the conical surface of the opening. Further, the antenna device extends from the inner surface of the cover toward the through hole, further includes a screwed portion surrounded by the hood, the fastening portion is a male screw, and the shaft portion of the male screw is the penetrating portion. While screwing into the screwed portion through the hole, the head of the male screw is caught on the lower surface of the base, and the opening of the through hole on the upper surface side of the base expands in a conical shape, and the screwed portion The tip of the screw enters the opening of the through hole on the upper surface side of the base and abuts on the conical surface of the opening. According to the above, since the tip of the screwed portion enters the opening of the through hole and is in contact with the conical surface of the opening, it is possible to further improve the water-stopping and airtightness in the through hole of the fastening portion. it can. In addition, the positioning of the cover and the base is also improved.</p>

<p> According to the present invention, it is possible to achieve both water-stopping and airtightness in the through hole of the fastening portion and water-stopping and airtightness in the gap between the cover and the base.</p>

Hereinafter, preferred embodiments for carrying out the present invention will be described with reference to the drawings. However, although the embodiments described below are provided with various technically preferable limitations for carrying out the present invention, the scope of the present invention is not limited to the following embodiments and illustrated examples.

FIG. 1 is an exploded perspective view of the antenna device 1 shown when viewed from diagonally above, FIG. 2 is an exploded perspective view of the antenna device 1 shown when viewed from diagonally below, and FIG. 3 is an exploded perspective view of the antenna device 1. It is a vertical sectional view. The antenna device 1 as an electric device is attached to the roof of an automobile, the roof of a vehicle, or other installation locations.

The antenna device 1 has a cabinet 10 and two circuit boards 5, and these circuit boards are housed in the cabinet 10. A demultiplexing circuit, an amplifier circuit, and the like are incorporated in the circuit board 5. One of the two circuit boards 5 is a board for AM / FM, and the other is a board for GSM. The radio wave method / standard that can be processed by these circuit boards 5 is not limited to AM / FM and GSM, and may be other.

In the cabinet 10, the gasket 2 is attached to the upper edge of the plate-shaped base 3, the cover 4 covers the base 3, and the rubber gasket 2 is sandwiched between the cover 4 and the base 3. , The cover 4 and the base 3 are joined by the fastening screw 9 which is a male screw. As a result, an internal space surrounded by the cover 4 and the base 3 is formed, and the circuit board 5 is housed in this internal space.

The base 3 is formed in an oval shape. The insertion portion 6 is provided in a convex shape on the lower surface of the base 3, and the wiring hole 7 penetrates from the tip of the insertion portion 6 to the upper surface of the base 3. Wiring is passed through the wiring hole 7.

A convex portion 8 is provided on the upper surface of the base 3 in a convex shape. The convex portion 8 is formed in a frame shape along the edge of the upper surface of the base 3. On the other hand, the gasket 2 is formed in a ring shape, the convex portion 8 is fitted into the gasket 2, and the gasket 2 surrounds the convex portion 8 and is placed on the upper surface of the base 3.

The base 3, the insertion portion 6 and the convex portion 8 are integrally formed. The base 3, the insertion portion 6 and the convex portion 8 are made of a conductive material, particularly a metal material such as zinc.

The cover 4 is formed in a conical shape, and the lower side of the cover 4 is open. A support metal fitting 45 is provided on the crown of the cover 4, and a rod-shaped antenna element is attached to the support metal fitting 45.

The base 3 is nested and fitted into the opening of the cover 4, and the opening is closed by the base 3. A stepped portion 41 is formed on the inner surface of the cover 4 in the vicinity of the lower opening. The stepped portion 41 is formed in a ring shape along the lower opening of the cover 4. The gasket 2 is sandwiched between the stepped portion 41 and the upper surface edge portion of the base 3. Water-stopping and airtightness are maintained by the gasket 2.

The circuit board 5 is housed in the cover 4 while standing on the upper surface of the base 3 inside the convex portion 8. A pair of left and right ribs 62 are provided convexly on the front side of the upper surface of the base 3, and a pair of left and right ribs 66 are provided convexly on the rear side of the upper surface of the base 3. The front end 51 of the lower end of the circuit board 5 is sandwiched between a pair of ribs 62, and the rear end 54 of the lower end of the circuit board 5 is sandwiched between a pair of ribs 66, whereby the circuit board 5 is kept upright. There is. A pair of left and right ribs 62 are provided as one set, and a total of two sets are provided. A pair of left and right ribs 66 are provided as one set, and a total of two sets are provided, so that the two circuit boards 5 are parallel to each other. It stands on the upper surface of the base 3.

The elastic piece 22 is placed on the front end portion 51 of the circuit board 5 and the pair of ribs 62. The front end portion 51 and the elastic piece 22 of the circuit board 5 are pressed against the base 3 side by the pressing portion 43 projecting on the inner surface of the cover 4. Similarly, the elastic piece 23 is placed on the rear end portion 54 and the pair of ribs 66 of the circuit board 5, and the rear end portion 54 and the elastic piece 23 of the circuit board 5 are pressed so as to be projected on the inner surface of the cover 4. Pressed by part 44. As a result, the circuit board 5 is fixed. The elastic pieces 22 and 23 are integrally formed with the gasket 2.

The upper end of the erected circuit board 5 is supported by the support 46 on the inner surface of the cover 4. Further, a terminal 58 is attached to the upper end of the circuit board 5, and the terminal 58 is in contact with the support metal fitting 45.

A pair of left and right pedestals 31 are provided in a convex shape on the upper surface of the base 3 and inside the convex portion 8. A pair of left and right through holes 32 penetrate the base 3 from the lower surface of the base 3 to the top surface of the pedestal 31. The opening of the through hole 32 on the parietal surface side of the pedestal 31 is widened in a conical shape, and the conical surface 33 is formed in the opening of the through hole 32. On the other hand, a pair of left and right screwed portions 42 are formed on the inner surface of the cover 4. The tubular screwed portion 42 extends from the inner surface of the cover 4 toward the through hole 32, and the tip of the screwed portion 42 is at a position corresponding to the through hole 32. The tip of the screwed portion 42 enters the opening of the through hole 32 on the parietal surface side of the pedestal 31 and abuts on the conical surface 33 of the opening. A rubber O-ring may be attached to the tip of the screwed portion 42, and the O-ring may be sandwiched between the tip of the screwed portion 42 and the conical surface 33.

Further, a female screw is formed on the inner surface of the screwed portion 42 by an assembly method described later. On the other hand, the fastening screw 9 is connected to the inner surface of the cover 4 via the screwing portion 42. That is, the shaft portion 91 of the fastening screw 9 is passed through the through hole 32 from under the base 3 and screwed into the screwing portion 42. The head 92 of the fastening screw 9 is hooked on the lower surface of the base 3 around the through hole 32. By tightening the shaft portion 91 of the fastening screw 9, the base 3 is attracted to the cover 4 side by the head portion 92 of the fastening screw 9. As a result, the gasket 2 and the elastic pieces 22, 23 are compressed. Since the rubber elastic body is not sandwiched between the head 92 of the fastening screw 9 and the lower surface of the base 3, the gasket 2 and the elastic pieces 22 and 23 can be strongly compressed by the tightening force of the fastening screw 9.

When the base 3 is covered by the cover 4, the center line of the conical cover 4 is slanted with respect to the upper surface of the base 3. The center line of the screwed portion 42 is parallel to the center line of the conical cover 4, and the axis of the shaft portion 91 of the fastening screw 9 is substantially parallel to the center line of the cover 4.

A raised portion 34 is formed around the pedestal 31 and on the upper surface of the base 3. The raised portion 34 is raised from the upper surface of the base 3, the height of the raised portion 34 is equal to the height of the convex portion 8, and the raised portion 34 is connected to the convex portion 8. Inclined surfaces 35 are formed before and after the pedestal 31. The inclined surface 35 is provided so as to cross the convex portion 8 from the upper surface edge portion of the base 3 to the parietal surface of the raised portion 34. The inclined surface 35 is inclined so as to climb from the upper surface edge portion of the base 3 to the parietal surface of the raised portion 34.

The pedestal 31 is surrounded by a frame-shaped seal 21. The seal 21 is provided so as to extend inward from the gasket 2. The seal 21 is made of rubber and is integrally formed with the gasket 2. The seal 21 rests on the inclined surface 35, crosses the convex portion 8, rests on the parietal surface of the raised portion 34, and surrounds the pedestal 31 in a state of being in contact with the side surface of the pedestal 31. By fitting the pedestal 31 into the seal 21, the through hole 32 is also surrounded by the seal 21.

On the other hand, a pair of left and right hoods 47 are formed on the inner surface of the cover 4. A screwed portion 42 is provided in the hood 47, and the hood 47 surrounds the screwed portion 42. The underside of the hood 47 is open. The pedestal 31 enters the lower opening of the hood 47, and the lower end of the hood 47 is pressed against the seal 21. The pressing of the hood 47 and the seal 21 is performed by tightening the fastening screw 9. By compressing the seal 21 by the hood 47, the water-stopping and airtightness around the through hole 32 is maintained.

The method of assembling the antenna device 1 and the cabinet 10 will be described. First, the circuit board 5 is erected on the upper surface of the base 3, and the front end portion 51 of the circuit board 5 is inserted between the ribs 62 and the ribs 62, and the rear end portion 54 is inserted between the ribs 66 and the ribs 66.

Next, the convex portion 8 of the base 3 is fitted to the gasket 2, and the gasket 2 is placed on the upper surface of the base 3 around the convex portion 8. At this time, the position of the gasket 2 in the circumferential direction is adjusted so that the elastic piece 22 is placed on the rib 62 and the front end portion 51 of the circuit board 5, and the elastic piece 23 is placed on the rib 66 and the rear end portion 54 of the circuit board 5. Place it on top, fit the pedestal 31 into the seal 21, and place the seal 21 around the pedestal 31. Since the elastic pieces 22, 23 and the seal 21 are integrated with the gasket 2, the positions of the elastic pieces 22, 23 and the seal 21 are also determined when the gasket 2 is assembled. Therefore, the assemblability is improved.

Next, the circuit board 5 is covered with the cover 4, and the base 3 is fitted into the lower opening of the cover 4. As a result, the gasket 2 is sandwiched between the stepped portion 41 inside the cover 4 and the base 3, the elastic piece 22 is sandwiched between the front end portion 51 and the pressing portion 43 of the circuit board 5, and the elastic piece 23 is sandwiched between the circuit boards. It is sandwiched between the rear end portion 55 of 5 and the pressing portion 44, and the seal 21 is sandwiched between the lower end of the hood 47 and the upper surface of the base 3. By fitting the base 3 into the lower opening of the cover 4, the upper end of the circuit board 5 is supported by the support 46, and the terminal 58 contacts the support bracket 45. Further, the tip of the screwed portion 42 faces the upper opening of the through hole 32.

Next, the fastening screw 9 is passed through the through hole 32 from under the base 3, and the fastening screw 9 is tightened to the screwing portion 42. The fastening screw 9 uses, for example, a tapping screw, and is screwed into the screwing portion 42 to form a female screw on the inner surface of the screwing portion 42 and is tightened. By doing so, the cover 4 is attracted to the upper surface of the base 3, the elastic pieces 22, 23, the seal 21, and the gasket 2 are compressed, and the tip of the screwed portion 42 is inserted into the upper opening of the through hole 32 to form the conical surface 33. To contact. The hood 47 is pressed against the seal 21 to seal around the fastening screw 9, and the stepped portion 41 is pressed against the gasket 2 to seal the gap between the lower end of the cover 4 and the upper surface of the base 3. It will be stopped. Further, the lower portion of the circuit board 5 is fixed by pressing the end portions 51, 54 of the circuit board 5 against the base 3 by the pressing portions 43, 44.

After that, when the antenna element is attached to the support metal fitting 45, the antenna device 1 is completed.

When attaching this antenna device 1 to the roof of an automobile or other installation location, a hole is formed in the installation surface, the insertion part 6 is inserted into the hole, the base 3 is placed on the installation surface, and the insertion part is inserted. Fix 6 in the hole.

As described above, according to the present embodiment, since the head 92 of the fastening screw 9 is caught on the lower surface of the base 3 and attracts the base 3 to the cover 4 side, both the gasket 2 and the seal 21 are pressed with a strong force. Can be compressed. That is, the tightening force of the fastening screw 9 is not reduced and is used for compressing the gasket 2 and the seal 21. Therefore, the watertightness / airtightness of the through hole 32 is not deteriorated, and the watertightness / airtightness of the gap between the cover 4 and the base 3 is not deteriorated.

Further, the seal 21 is integrally formed with the gasket 2, thereby ensuring water-stopping and airtightness in the through hole 32. Therefore, at the time of assembly, it is not necessary to apply a liquid silicone rubber around the through hole 32 and then dry the silicone rubber. Therefore, it is possible to reduce the cost and time required for assembly.

The present invention is not limited to the above-described embodiment, and various improvements and design changes may be made without departing from the spirit of the present invention. For example, in the above embodiment, the seal 21 is placed on the raised portion 34, but the seal 21 may be placed on the pedestal 31 as shown in FIG. Further, as shown in FIG. 5, the pedestal 31 and the raised portion 34 may not be provided. Further, as shown in FIG. 6, the pedestal 31 may not be provided.

In the above embodiment, the fastening portion is a male screw, but it may be a rivet. In this case, instead of the screwed portion 42 shown in FIG. 3, a rivet is formed on the inner surface of the cover 4, and the rivet extends downward from the inner surface of the cover 4. The rivet penetrates the through hole 32 from top to bottom, and the tip of the rivet is crimped. As the tip of the rivet is deformed, the tip is caught on the lower surface of the base 3 around the through hole 32. When crimping the rivet, the base 3 is pressed against the cover 4 side to compress the gasket 2, the seal 21, and the elastic pieces 22, 23.

<figref num="1">It is a perspective view which showed the antenna device in embodiment of this invention.</figref><figref num="2">It is a perspective view which showed the antenna device in the same embodiment.</figref><figref num="3">It is a vertical cross-sectional view which showed the antenna device in the same embodiment.</figref><figref num="4">It is a vertical cross-sectional view which showed the antenna device in the modification.</figref><figref num="5">It is a vertical cross-sectional view which showed the antenna device in another modification.</figref><figref num="6">It is a vertical cross-sectional view which showed the antenna device in another modification.</figref>

Code description

1 Antenna device 2 Gasket 3 base 4 cover 5 Circuit board 9 Fastening screw 10 cabinet 21 seal 32 through hole 33 Conical surface 42 Screwed part 47 hood 91 Shaft 92 head