JP2015046483A - Waterproof housing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a configuration capable of accessing the interior easily even after attachment to an installation place, while achieving excellent waterproofness and design, in a housing for housing a printed circuit board and having a cable introduction part for introducing a cable for connection with the printed circuit board.SOLUTION: A waterproof housing includes a base 20, a cover 50, and a seal 40. The metallic base 20 has a side face 22 where a printed circuit board 31 is arranged and attached to an installation place. The cover 50 covers the open part of the base 20 and at least a part of the side face 22 of the base 20. The seal 40 is arranged in the base 20, and ensures waterproofness by coming into contact with the cover 50. In the side face 22 of the base 20, a cable introduction part 23 for taking a cable, to be connected with the printed circuit board 31, into the base 20 from the outside is formed.

Description

  The present invention relates to a waterproof housing that accommodates a printed circuit board.

  Conventionally, it is often performed to provide waterproofness to a housing in which an electronic component is accommodated. Patent documents 1 and 2 disclose this kind of case.

  Patent Document 1 discloses a housing including a device main body, a door, and a packing. The device body is a box-shaped member having an open portion. The door is a box-like member that covers the open part of the device body, and is slightly larger in size than the device body. The packing is arrange | positioned between the apparatus main body and the door, and the taper surface is formed. In this housing, the waterproofness is realized by pressing the tapered surface of the side surface of the door when the door is closed.

  Patent Literature 2 discloses a housing including a housing portion, a lid portion, and a waterproof packing. The housing part and the lid part are joined at two joining surfaces. The waterproof packing includes a main waterproof portion and a sub waterproof portion. The main waterproof part and the sub waterproof part waterproof each of the two joint surfaces of the housing part and the lid part.

  Further, when the printed circuit board is accommodated in the housing, the printed circuit board may be connected to an external device with a cable for communication or power supply. In this case, it is necessary to form a cable introduction part in the housing. In general, a housing that accommodates a printed circuit board includes a base portion 91 and a cover portion 92, as shown in FIG. The base portion 91 is attached to an installation location 100 such as a wall surface, and a printed circuit board is disposed inside. The cover part 92 is a box-shaped member that covers the upper part and the side part of the base part 91, and a cable introduction part 93 for passing a cable is formed.

Japanese Utility Model Publication No. 5-86846 JP 7-280100 A

  However, in this type of housing, even if maintenance or the like for the printed circuit board is required, the cable is in the way and it is not possible to remove only the cover portion 92. Therefore, it is necessary to remove the base portion 91 from the installation location 100, turn the casing over, and remove the cover portion 92 from the base portion 91.

  In addition, as shown in FIG.4 (b), this subject can be solved by attaching the cover part 92 to the installation location 100. FIG. However, in this configuration, due to the draft angle formed in the cover portion 92, the cover portion 92 becomes an inverted trapezoidal shape (a shape whose width increases with distance from the installation location 100). This shape is not adopted because it is not preferable from the viewpoint of design.

  The present invention has been made in view of the above circumstances, and the main object of the present invention is to provide a housing having a cable introduction part for accommodating a printed circuit board and introducing a cable connected to the printed circuit board. An object of the present invention is to provide a configuration that allows easy access to the inside even after installation to an installation location while realizing waterproofness and design.

Means and effects for solving the problems

  The problems to be solved by the present invention are as described above. Next, means for solving the problems and the effects thereof will be described.

  According to the viewpoint of this invention, the following structures are provided in the waterproof housing | casing which accommodates a printed circuit board. That is, this waterproof housing includes a base portion, a cover portion, and a seal portion. The base part is made of metal and has a side part, and the printed circuit board is arranged and attached to an installation location. The cover part covers the open part of the base part and at least a part of the side part of the base part. The seal portion is disposed on the base portion and waterproofs by being in contact with the cover portion. A cable introduction part for taking in a cable connected to the printed circuit board from the outside to the inside of the base part is formed on the side surface part of the base part.

  Thereby, the structure which can remove a cover part, without removing the said base part from an installation location by forming a cable introduction part in a base part is realizable, without impairing the design property of a waterproof housing. Accordingly, maintenance of the printed circuit board can be easily performed. Furthermore, since the base portion is made of metal, sufficient mechanical strength can be realized even if the cable introduction portion is formed.

  The waterproof casing preferably has the following configuration. That is, the portion of the side surface portion where the cable introduction portion is formed has a height higher than that of the other side surface portion, and the height gradually changes at the height change portion. The seal portion is formed along the height of the side surface portion.

  If the portion where the cable introduction portion is formed is raised vertically, the seal portion is difficult to compress and waterproofing becomes difficult. However, since the seal portion can be compressed by gradually changing the height (starting up obliquely) as described above, waterproofness can be easily realized.

  In the waterproof casing, it is preferable that the seal portion performs waterproofing by contacting an inner side of a side surface portion of the cover portion.

  Thereby, since it is not necessary to press the base part and the cover part uniformly and strongly, for example, the number of screws can be reduced and the attachment of both can be simplified. Therefore, it is possible to further reduce labor during maintenance and the like.

  In the waterproof casing, it is preferable that a space is formed in the base portion between the cable introduction portion and the printed board.

  Thereby, workability | operativity at the time of a maintenance etc. can be improved.

  In the waterproof casing, it is preferable that the printed circuit board is disposed so as to be covered with a metal box-shaped member, and the box-shaped member is attached to the base portion.

  Thereby, a printed circuit board can be protected from the influence of electromagnetic waves.

  In the waterproof casing, the box-shaped member preferably has a waterproof property.

  Thereby, stronger waterproofness is realizable.

  In the waterproof casing, the cover part is preferably made of resin.

  Thereby, since the printed circuit board can be protected from the influence of electromagnetic waves by the metal box-shaped member, the cover portion can be made of resin. Therefore, weight reduction and cost reduction can be realized.

  In the waterproof casing, it is preferable that the cable introduction portion is one or a plurality of through holes formed side by side on the side surface portion of the base portion.

  Thereby, the inside and outside of a housing | casing can be electrically connected by inserting a cable in this through-hole.

  In the waterproof housing, a waterproof cap in which a cable hole is formed is preferably attached to a through hole into which the cable is inserted in the cable introduction portion.

  Thereby, a cable can be inserted, ensuring waterproofness.

  In the waterproof housing, a waterproof cap in which no cable hole is formed is preferably attached to a through hole in which the cable is not inserted in the cable introduction portion.

  As a result, water from the cable introduction portion can be prevented, so that stronger waterproofing can be realized.

  The waterproof casing preferably has the following configuration. That is, a mounting hole is formed on the upper surface of the cover portion. A screw for fixing the cover portion and the base portion and a waterproof lid that is located above the screw and waterproofs the attachment hole are inserted into the attachment hole.

  Thereby, since it is possible to prevent water from being generated from the attachment portion between the cover portion and the base portion, it is possible to realize a stronger waterproof property.

  In the waterproof casing, it is preferable that a cutout is formed in a side surface portion of the cover portion at a position corresponding to the cable introduction portion.

  Thereby, compared with the structure which does not provide the side surface itself of a cover part, since more cover parts can be left, design property can be maintained.

1 is an external perspective view of a waterproof housing according to an embodiment of the present invention. The exploded perspective view of a waterproof housing. The AA sectional view of Drawing 2 showing signs that waterproofing is realized by a seal part. The figure which shows the structure of the waterproof housing | casing conventionally used, and the structure of the waterproof housing | casing which is not employ | adopted conventionally.

  Next, embodiments of the present invention will be described with reference to the drawings.

  As shown in FIG. 1, the waterproof housing 1 is a box-shaped member, and is attached to a predetermined installation location 100 (a wall surface, a floor, the surface of another member, etc.). A printed circuit board 31 is disposed inside the waterproof housing 1. The printed circuit board 31 is connected to an external power source or an electronic device via the cable 60. The waterproof housing 1 is a member for waterproofing the printed circuit board 31 disposed inside. Hereinafter, a detailed configuration of the waterproof housing 1 will be described.

  As shown in FIG. 2, the waterproof housing 1 includes a base portion 20, a board connection box (box-like member) 30, a seal portion 40, and a cover portion 50. In the following description, the side to which the cable 60 is connected in the waterproof housing 1 is referred to as “front side”, and the opposite side is referred to as “rear side”.

  The base portion 20 is a metal member and is attached to the installation location 100. The base portion 20 is formed with a bottom surface portion 21 and a side surface portion 22.

  The bottom surface portion 21 is a flat plate portion that constitutes the bottom surface of the base portion 20. A substrate connection box 30 is disposed on the bottom surface portion 21.

  The board connection box 30 is a metal box-like member, and a printed board 31 is arranged inside. The board connection box 30 includes a connection terminal 32 configured to be electrically connected to the printed board 31. The printed circuit board 31 is connected to an external power source or an electronic device via the connection terminal 32.

  Since the board connection box 30 is made of metal, the printed board 31 can be protected from the influence of electromagnetic waves. Further, since the board connection box 30 and the base part 20 are made of metal, the heat generated in the printed board 31 can be released to the outside satisfactorily.

  Since the connection terminal 32 may be difficult to be waterproof depending on the type, the printed circuit board 31 is waterproofed not by the board connection box 30 but by the waterproof housing 1. Thereby, the printed circuit board 31 can be waterproofed regardless of the type of the connection terminal 32.

  The side part 22 is a part formed so that it may extend up and down from the edge part (outer edge) of the bottom face part 21, as shown in FIG.2 and FIG.3. Below, the part which comprises the front side among the side parts 22 is called the front side part 22a.

  The front side surface portion 22 a is configured to be higher than the other side surface portions 22. The connection portion (that is, the height change portion) between the front side surface portion 22a and the other side surface portion 22 is formed not to stand vertically but to stand up diagonally (that is, so that the height gradually changes). Has been. The front side surface portion 22a has a substantially trapezoidal concave portion formed on the front surface side, and a plate-like member connected to the rear surface side. By connecting this plate-shaped member, the front side surface portion 22 a is configured to be thicker than the other side surface portions 22.

  A cable introduction portion 23 is formed on the front side surface portion 22a. The cable introduction part 23 is a plurality of through holes formed side by side on the front side surface part 22a.

  Waterproof caps 25 a and 25 b and a fixing plate 26 are attached to the cable introduction portion 23. The waterproof cap 25a is a rubber member in which a cable hole is formed, and is attached to the cable introduction portion 23 into which the cable 60 is inserted. The cable 60 can be inserted while realizing waterproofness by the cable hole formed in the waterproof cap 25a. The waterproof cap 25b is attached to each of the cable introduction portions 23 into which the cable 60 is not inserted. Since the waterproof cap 25b is not formed with a cable hole, the waterproof property can be further strengthened. The fixing plate 26 is a plate-like member for collectively fixing and sealing the plurality of waterproof caps 25 a and 25 b to the base portion 20. The cable hole may be a cut as shown in FIG. 2, a hole having a circular or polygonal cross section, or both of them may be formed.

  The board connection box 30 is arranged at a position away from the front side surface part 22a to some extent. Thereby, since a space can be formed between the cable introduction part 23 and the connection terminal 32, workability | operativity can be improved.

  Here, when forming the cable introduction part 23, as shown in FIG. 2 etc., it is necessary to form a comparatively large through-hole depending on the diameter of the cable 60 and the size of the connector at the tip of the cable 60. In general, when a large through-hole is formed, the mechanical strength is reduced by the reaction force of the waterproof caps 25a and 25b. However, in the present embodiment, a reduction in mechanical strength is prevented by adopting a metal having excellent mechanical strength for the base portion 20 and increasing the thickness of the front side surface portion 22a.

  The seal part 40 is a lip type member (packing) made of a member having elasticity such as rubber. The seal part 40 is formed in a shape along the upper surface of the side part 22. As shown in FIGS. 2 and 3, the seal portion 40 is formed with a fitting portion 41, a lip portion 42, and a notch portion 43.

  The fitting portion 41 is a portion whose cross section is formed in an inverted U shape. As shown in FIG. 3A, the seal portion 40 is attached to the upper surface of the side surface portion 22 so that the side surface portion 22 enters the U-shaped open portion.

  The lip portion 42 is a portion formed so as to spread outward from the fitting portion 41 (so as to have a hook shape). As shown in FIG. 3B, the lip portion 42 is in contact with the inside of the side surface portion of the cover portion 50 to be deformed, thereby realizing waterproofness.

  As described above, the connection portion between the front side surface portion 22a and the other side surface portion 22 is formed to rise obliquely, and thus the seal portion 40 has the same shape. Therefore, the lip portion 42 can be deformed in the direction and state to be deformed by the cover portion 50 even at the connection location, so that waterproofness can be realized. If the contact location rises vertically, the lip portion 42 cannot be deformed in the direction and state in which the lip portion 42 should be deformed at the connection location, and waterproofness cannot be realized.

  The cutout portion 43 is a portion in which the inside of the fitting portion 41 is partially cutout. The notch 43 is formed at a plurality of locations. The effect of the notch 43 will be described later.

  The cover part 50 is a box-shaped member made of resin. The cover part 50 is attached so as to cover the open part of the base part 20 and at least a part of the side part 22. Ribs 51, cable openings 52, and attachment holes 53 are formed in the cover portion 50. In addition, although the rib 51 is formed in three surfaces other than the front surface of the cover part 50, only the rib 51 formed in 1 surface is shown in view of the visibility of drawing.

  The rib 51 is a protrusion formed inside the side surface portion of the cover portion 50. The lower end portion of the rib 51 further protrudes inward. The lower end portion of the rib 51 is located inside the cutout portion 43 of the seal portion 40 (that is, inside the side surface portion 22) when the cover portion 50 is attached to the base portion 20. Thereby, since it can prevent that the cover part 50 spreads outside by the elastic force of the seal part 40, strong waterproofness is realizable.

  The cable opening 52 is a notch formed to expose the cable introduction part 23. Thus, by forming the notch (cable opening 52) only in a part of the side surface portion of the cover portion 50, most of the side surface portion of the cover portion 50 can be left, and the design can be maintained. it can.

  A plurality of attachment holes 53 are formed on the upper surface of the cover portion 50. The cover part 50 can be fixed to the base part 20 by inserting the screw 54 into the attachment hole 53 and attaching the screw 54 to the upper surface of the substrate connection box 30. After the screw 54 is attached, a waterproof lid 55 is attached to the upper part of the screw 54. Thereby, waterproofness can be improved.

  As described above, the waterproof housing 1 includes the base portion 20, the cover portion 50, and the seal portion 40. The metal base part 20 has a side part 22 formed thereon, a printed circuit board 31 is disposed, and is fixed to the installation location 100. The cover part 50 covers the open part of the base part 20 and at least a part of the side part 22 of the base part 20. The seal portion 40 is disposed on the base portion 20 and waterproofs by being in contact with the cover portion 50. A cable introduction portion 23 is formed on the side surface portion 22 of the base portion 20 to take in the cable 60 connected to the printed circuit board 31 from the outside of the base portion 20.

  Thereby, the structure which can remove the cover part 50, without removing the base part 20 from the installation location 100 by forming the cable introduction part 23 in the base part 20, without impairing the design property of the waterproof housing 1 realizable. Accordingly, maintenance of the printed circuit board 31 can be easily performed. Furthermore, since the base portion 20 is made of metal, sufficient mechanical strength can be realized even if the cable introduction portion 23 is formed.

  The preferred embodiment of the present invention has been described above, but the above configuration can be modified as follows, for example.

  The shape of the base part 20 is arbitrary and can be changed as appropriate. For example, the side part 22 may be configured to extend only upward, and the installation location 100 and the base part 20 may be brought into contact with each other. Moreover, the base part 20 may be directly attached to the installation location 100, and may be attached to the installation location 100 via another member.

  In the above embodiment, the cable introduction portion 23 is configured by a plurality of through holes, but may be one. Moreover, even if the cable introduction part 23 is comprised by one through-hole, the some cable 60 can be introduced using the waterproof cap etc. in which the cable hole was formed in multiple numbers.

  The number of printed circuit boards 31 arranged in the board connection box 30 is arbitrary and can be changed as appropriate. Further, by using the sealing member or the connection terminal 32 having waterproof property to provide the substrate connection box 30 with waterproof property, stronger waterproof property can be realized. Furthermore, the board connection box 30 may be omitted.

  In the above embodiment, the lip type seal portion 40 is used. However, a squeeze type seal portion that is waterproofed by being sandwiched between the base portion 20 and the cover portion 50 and compressed. The advantage of using the squeeze type is that the seal portion can be made inexpensive. Further, the advantage of using the lip type is that it is not necessary to press and compress the seal portion uniformly and strongly unlike the squeeze type, so that the number of screws 54 and the like can be reduced, and the labor during maintenance can be reduced.

  The shape of the cover part 50 is arbitrary as long as it covers the open part of the base part 20 and partially or entirely covers the side part 22 of the base part 20.

DESCRIPTION OF SYMBOLS 1 Waterproof housing | casing 20 Base part 21 Bottom part 22 Side part 23 Cable introduction part 30 Board | substrate connection box (box-shaped member)
31 Printed circuit board 40 Seal part 50 Cover part 60 Cable

Claims (12)

A waterproof housing that houses a printed circuit board,
A side part is formed, the printed circuit board is arranged, and a metal base part attached to an installation location;
A cover portion that covers the open portion of the base portion and at least a part of the side surface portion of the base portion;
A seal portion disposed on the base portion and waterproofed by contacting the cover portion;
With
A waterproof housing, wherein a cable introduction part for taking in a cable connected to the printed circuit board from the outside to the inside of the base part is formed on a side part of the base part. The waterproof housing according to claim 1,
Of the side surface portion, the portion where the cable introduction portion is formed has a height higher than that of the other side surface portion, and the height gradually changes at the change portion of the height,
The waterproof casing is characterized in that the seal portion is formed along the height of the side surface portion. The waterproof casing according to claim 1 or 2,
The waterproof case is characterized in that the seal portion is waterproofed by being in contact with the inside of the side surface portion of the cover portion. A waterproof housing according to any one of claims 1 to 3,
A waterproof housing, wherein a space is formed in the base portion between the cable introduction portion and the printed circuit board. The waterproof housing according to any one of claims 1 to 4,
The said printed circuit board is arrange | positioned so that it may be covered with metal box-shaped members, The said box-shaped member is attached to the said base part, The waterproof housing | casing characterized by the above-mentioned. The waterproof casing according to claim 5,
The waterproof casing is characterized in that the box-shaped member is waterproof. The waterproof housing according to claim 5 or 6,
The waterproof casing characterized in that the cover part is made of resin. A waterproof housing according to any one of claims 1 to 7,
The waterproof casing, wherein the cable introduction part is one or a plurality of through holes formed side by side on a side part of the base part. The waterproof housing according to claim 8,
A waterproof housing having a waterproof cap formed with a cable hole attached to a through-hole into which the cable is inserted in the cable introduction portion. The waterproof housing according to claim 8 or 9,
A waterproof casing having a cable cap not formed therein is attached to a through hole in which the cable is not inserted in the cable introduction portion. The waterproof housing according to any one of claims 1 to 10,
A mounting hole is formed on the upper surface of the cover part,
In the mounting hole,
A screw for fixing the cover part and the base part;
A waterproof lid that is located above the screw and waterproofs the mounting hole;
A waterproof casing, characterized by being inserted. The waterproof housing according to any one of claims 1 to 11,
Wherein the side portion of the cover portion, at a position corresponding to the cable entry portion, notches may be characterized which are formed a waterproof housing.

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