JP2010278056A - Storage case, flow velocity decreasing structure for fluid, and marine electronic equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a storage case which has air permeability and also has protecting performance against a strong jet, a flow velocity decreasing structure for fluid, and marine electronic equipment. <P>SOLUTION: The storage case includes a storage body 10 having a vent hole 12 for communicating an internal storage space 11 with the outside, a base body 20 attached detachably to the storage body 10, a flow passage 30 formed in contact surfaces of the storage body 10 and base body 20 to communicate the vent hole 12 with the outside, a body-side protruding part 40 protruding from a flow passage surface on the side of the storage body 10 toward the base body 20, and a base body-side protruding part 50 protruding from a flow passage surface on the side of the base body 20 at a position different from the arrangement position of the body-side projection part 40 toward the storage body 10. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a housing case, a fluid flow velocity reduction structure, and marine electronic equipment.

  Conventionally, what has the structure which suppresses the approach to accommodation space with respect to the fluid from the exterior of accommodation space is known.

  For example, the housing structure of the outdoor installation device described in Patent Document 1 is provided with a breathing hole for ventilation for adjusting a pressure difference inside and outside the housing at the bottom of the housing, and water-resistant at the opening of the breathing hole in contact with the outside air. In addition, a waterproof breathable membrane having air permeability is provided, and further, silica gel is filled in the air flow path inside the waterproof breathable membrane. And when air flows in and out of the housing, the waterproof breathable membrane and the silica gel are allowed to pass therethrough so as to suppress an increase in humidity in the housing due to the air flowing into the housing.

  In addition, the electronic circuit board housing case described in Patent Document 2 has a vent hole and a water repellent filter attached to the vent hole by insert molding. And it is comprised so that the liquid and foreign material which entered the ventilation hole may be discharged | emitted by forming the discharge auxiliary | assistant part in a ventilation hole.

  The housing case for an electronic circuit board described in Patent Document 3 forms a hollow projecting portion projecting outwardly to form a vent, and a water repellent filter is attached to the end surface of the projecting portion. . And when a liquid has transmitted the case surface, it is comprised so that a liquid may adhere to the attachment part of a water repellent filter.

  In addition, the waterproof case described in Patent Document 4 contains a printed wiring board or the like inside, and stands up so as to surround a breathing filter for breathing inside and outside of the waterproof case and an arrangement part of the breathing filter. It has a protective wall and at least two or more drainage recesses that open at different positions on the protective wall. And it is comprised so that the jet flow by a high pressure washing | cleaning etc. may hit a breathing filter directly.

JP-A-6-31130 JP 2004-356524 A JP-A-2005-150376 JP 2007-141959 A

  In Patent Documents 1 and 2, the air vent or the water repellent filter directly faces the outside air. For example, for a strong jet from any direction as defined in IEC 60529 protection class IPX6, There is a possibility that the ingress of the fluid cannot be prevented. Moreover, in patent documents 3 and 4, although the waterproofness from the outside is improved by using the water repellent filter which has a cap, there exists a possibility that air permeability may fall with a cap.

  Accordingly, an object of the present invention is to provide a housing case, a fluid flow velocity reduction structure, and a marine electronic device that have air permeability and have protection performance against strong jets.

  The housing case of the present invention includes a housing body having a body-side mounting surface, a housing space formed therein, a ventilation hole formed in the body-side mounting surface and communicating the housing space with the outside, and the body side A base body having a base-side mounting surface that comes into contact with the mounting surface, the base body being detachably mounted on the housing body, and formed by contacting the main body-side mounting surface and the base-side mounting surface; A flow channel communicating with the vent hole, a main body side protruding portion protruding from the flow channel surface on the housing main body side in the flow channel toward the base body side, and the main body side protruding portion in the communication direction of the flow channel. And a base body side projecting portion that projects from the base body side channel surface of the channel toward the housing body side.

  According to the said structure, the storage case has the flow path formed by contact | abutting the main body side mounting surface of a storage main body, and the base side mounting surface of a base body. That is, since it is unnecessary to form the housing main body or the like through the flow path in which the main body side projecting portion and the base body side projecting portion are projected, each configuration of the housing case can be easily formed. Thereby, a storage case can be manufactured cheaply. Since the flow path of the storage case communicates between the outside and the vent hole, the air inside the storage space and the outside can freely flow through the flow path. Thereby, a flow path can be made into the ventilation path of accommodation space.

  In addition, since air from the outside can freely flow through the flow path, there are cases where water contained in the air enters the flow path, and water and seawater with vigor from the outside. When such a fluid such as water or seawater enters the flow channel from the outside, the fluid travels toward the communication direction vent hole side of the flow channel. In the flow path, since the main body side protrusion and the base body side protrusion are protruded at different positions in the communication direction, the fluid collides with either the base body side protrusion or the main body side protrusion, Collides with the other protrusion. As a result, a part of the fluid colliding with the main body side projecting portion is changed in the base direction, and a part of the fluid colliding with the base body side projecting portion is changed in the accommodation main body side. Then, a part of the fluid whose course is changed in the direction including the components in the opposite directions by the projecting portions collides with each other. As a result, the flow velocity of the fluid entering from the outside decreases, and the progress of the fluid can be stopped until it flows into the accommodation space through the vent hole. As a result, the accommodation case can be ventilated in the accommodation space, and can reduce the possibility of entry of water or the like into the accommodation space even for a strong jet.

  The flow path of the storage case of the present invention is provided with the main body side protruding portion and the base body side protruding portion, and the flow path cross-sectional area is larger than the flow path cross-sectional area of the other portion. You may have the enlarged part expanded in the opposite direction.

  According to the above configuration, the flow path is provided with the main body side protruding portion and the base body side protruding portion, and the flow path cross-sectional area is in the opposite direction of the housing main body and the base body rather than the flow path cross-sectional area of other portions. It has an enlarged part. Thereby, when the fluid that travels in the communication direction in the flow path reaches the enlarged portion of the flow path, the flow velocity is reduced by increasing the cross-sectional area of the flow path. Then, a part of the fluid dispersed in the expanding direction of the expanding portion and having a reduced flow velocity collides with both projecting portions in the dispersing direction, and the path is changed. Thereafter, the flow velocity can be further reduced by the collision of part of the fluid whose course has been changed. Thereby, the possibility of entry of water or the like into the accommodation space can be further reduced.

  The base body side projecting portion of the housing case of the present invention projects such that the position of the tip is closer to the housing body side than the position of the body side projecting portion tip in the facing direction of the housing body and the base body. It may be.

  According to the said structure, the base body side protrusion part is protruded so that the position of a front-end | tip may be a accommodation main body side rather than the position of the main body side protrusion part front end in the opposing direction of an accommodation main body and a base body. That is, the main body side projecting portion and the base body side projecting portion are provided such that the tips overlap each other when the flow channel is viewed from the communication direction, so that the fluid entering the flow channel is at least one of the two projecting portions. It is possible to increase the possibility of collision. As a result, it is possible to reduce the possibility that the fluid that has entered the flow path proceeds in the direction of the air hole without colliding with both protrusions, and further reduce the possibility of the fluid entering the accommodation space.

  The flow path of the storage case of the present invention may be configured by a groove formed in at least one of the main body side mounting surface and the base side mounting surface.

  According to the said structure, the groove | channel formed in at least one of the main body side attachment surface and the said base side attachment surface forms the flow path. Thus, a groove is formed in at least one of the main body side mounting surface and the base side mounting surface, and the housing main body in which the main body side protruding portion is formed is attached to the base body in which the base body side protruding portion is formed. A flow path can be formed. For example, the flow path can be easily formed by bringing the flat base side mounting surface into contact with the main body side mounting surface in which the groove is formed.

  At least one of the housing body and the base body of the housing case of the present invention has an alignment projection that protrudes from the flow path surface in the opposing direction of the housing body and the base body and fits into the groove. It may be.

  According to the above configuration, since the projection for alignment of at least one of the housing body and the base body protrudes from the flow path surface in the opposing direction of the housing body and the base body and fits into the groove, the housing body is attached to the base body. In this case, the housing body can be easily positioned with respect to the base body. As a result, by using the groove for positioning, it is not necessary to add a positioning configuration to the housing body and the base body.

  As for the said flow path of the storage case of this invention, the adjoining 4 directions from the said air vent may extend mutually perpendicularly | vertically.

  According to the above-described configuration, the flow paths are adjacent to each other in the four directions from the vent hole and extend perpendicular to each other. As a result, even when the fluid enters any one of the four flow paths, the fluid can be easily discharged from the other flow paths. In addition, the flow velocity can be similarly reduced regardless of the direction of the jet flow.

  At least one of the main body side projecting portion and the base body side projecting portion of each flow path of the housing case of the present invention may be formed and arranged in a shape along a circular locus centering on the vent hole.

  According to the above configuration, at least one of the main body side projecting portion and the base body side projecting portion of each flow path is formed and arranged in a shape along a circular locus centering on the vent hole. Thereby, the course of the fluid can be changed in a direction different from the communication direction toward the vent hole of the flow path. As a result, it is possible to reduce the fluid toward the vent hole and further reduce the possibility of the fluid entering the accommodation space.

  The fluid flow velocity reduction structure according to the present invention includes a flow path having one end opened so that an external fluid can freely enter, and a communication direction of a part of the fluid that protrudes into the flow path and flows through the flow path. And a component in a direction opposite to the direction of communication of the fluid that is projected into the flow path and flows through the flow path and that has been changed by the path change section. And a reverse flow collision portion for changing the course in a direction including

  According to the above configuration, when the fluid enters the opening of the flow channel from the outside, a part of the communication direction of the fluid is changed by the route change portion protruding in the traveling direction of the fluid flowing in the flow channel. The In addition, the backflow collision unit changes the course of a part of the fluid flowing in the flow path in a direction including a component in the reverse direction with respect to the communication direction of the fluid changed in course by the route changing unit. Collide.

  The marine electronic device of the present invention includes the housing case and an electronic circuit board housed in the housing space of the housing case.

  According to the above configuration, the storage case can reduce the possibility of water or the like entering the storage space. As a result, it is possible to protect the electronic circuit board in the accommodation space from waves, splashing water when cleaning the installation environment of the marine electronic equipment, and the like.

  A marine electronic device according to the present invention includes the fluid flow velocity reduction structure described above and an electronic circuit board accommodated in an accommodation space communicated with the other end of the flow path of the fluid flow velocity reduction structure. Yes.

  According to the above configuration, the fluid flow velocity reduction structure can reduce the flow velocity of the fluid entering the flow path from the outside. Thereby, the possibility that a fluid such as water entering from the opening of the flow path reaches the electronic circuit board accommodated in the accommodation space can be reduced. As a result, the electronic circuit board in the accommodation space can be protected from fluids such as waves and splashes during cleaning.

  Thereby, the flow velocity of both fluids can be made small by colliding a part of fluid changed the course by the course change part and a part of fluid changed the course by the backflow collision part. As a result, even when the fluid enters the channel, the flow velocity of the fluid flowing in the channel can be reduced.

  An object of this invention is to provide the storage case which has the protection performance with respect to the strong jet from arbitrary directions, the flow velocity fall structure of a fluid, and a marine electronic device.

It is a perspective view which shows the installation aspect of a storage case. It is the II-II sectional view taken on the line of FIG. It is a disassembled perspective view which shows a storage case. FIG. 4 is a sectional view taken along line IV-IV in FIG. 2. It is the II-II line partial expanded sectional view of FIG. It is the cutting part end elevation which carried out the partial enlargement which shows the flow velocity fall operation | movement of the perpendicular | vertical direction of the fluid at the time of reaching the expansion area | region in a flow path. It is the cutting part end elevation which expanded the part which shows the flow rate fall operation | movement of the vertical direction of the fluid in the expansion area | region in a flow path. It is explanatory drawing which shows the flow velocity fall operation | movement of the horizontal direction of the fluid in a flow path. It is explanatory drawing which shows the discharge | emission operation | movement of the horizontal direction of the fluid in a flow path. It is explanatory drawing explaining the modification of the storage case formed so that a flow path may penetrate. It is explanatory drawing explaining the modification of the storage case in which a flow path is formed with a storage main body and a sealing member. FIG. 10 is a partially enlarged cutaway end view for explaining a modified example of the housing case in which the course changing portion and the backflow collision portion constituting the flow velocity reduction structure are formed by one member formed in the housing body. It is the cutting part end elevation which partially expanded explaining the modification of the storage case in which the course change part and backflow collision part which comprise a flow velocity fall structure are formed with one member formed in the base body.

  Hereinafter, a storage case, a fluid flow velocity reduction structure, and a marine electronic device according to an embodiment of the present invention will be described with reference to the drawings.

  As shown in FIG. 1, a marine electronic device 100 of the present embodiment is installed in a ship 200 and includes a housing case 1 and an electronic circuit board 4 housed in the housing case 1. The marine electronic device 100 protects the internal electronic circuit board 4 from a fluid such as a wave when the ship 200 is on the sea and a spray when cleaning the installation environment of the housing case 1 by the housing case 1.

  Here, the “fluid” refers to an object having fluidity having no regularity. The “fluid” is not limited to liquids such as water, seawater, and oil, and may be a collection of fine solids such as gas and granular materials.

(Configuration of the housing case 1)
As shown in FIG. 2, the storage case 1 of the present embodiment includes a storage body 10, a base body 20 that is detachably mounted on the storage body 10, and a base body 20 that is in contact with the storage body 10. The flow path 30 formed by this, the main body side protrusion part 40 protruded by the flow path surface in the flow path 30, and the base body side protrusion part 50 are provided.

  In the present embodiment, the storage case 1 is installed in the ship 200 so that the storage main body 10 is an upper part and the base body 20 is a lower part. That is, the storage case 1 attached so as to place the storage body 10 on the base body 20 is installed in the ship. Hereinafter, in the present embodiment, the housing case 1 in which the upper part is the housing body 10 and the lower part is the base body 20 will be described unless otherwise specified. That is, the description will be made assuming that the opposing direction of the housing body 10 and the base body 20 is the vertical direction. In addition, the arrangement | positioning aspect of the storage case 1 is not limited to this.

  Here, the “flow channel” refers to a channel that is communicated from one end to the other end and in which a fluid can flow from one end to the other end. The “flow channel” may be formed by a groove on the outer surface of the housing main body as in the present embodiment, or may be formed by a hole that penetrates the housing case. The “flow path” may be a tubular member such as a pipe.

(Structure of storage case 1: storage body 10)
FIG. 3 is an exploded perspective view showing the housing case 1. As shown in FIG. 3, the housing body 10 from which the base body 20 is attached and detached includes a panel 13, a cover 14, an internal pressure adjusting filter 15, and a packing 16.

(Panel 13)
As shown in FIG. 3, the panel 13 has a rectangular parallelepiped shape that is hollow and has one surface open. As shown in FIG. 2, the panel 13 constitutes the upper part of the housing body 10 and is disposed so that the open surface is on the base body 20 side in the vertical direction. Inside the panel 13, four fixing members 10 b for attaching the electronic circuit board 4 are formed. Each fixing member 10 b is disposed at each corner portion inside the closed surface facing the open surface of the panel 13. A screw hole is formed at the top of each fixing member 10b so that the electronic circuit board 4 can be attached by a screw member. Since each fixing member 10b is formed with the same length from the closed surface, the electronic circuit board 4 can be held in parallel with the closed surface.

(Cover 14)
As shown in FIG. 3, the cover 14 has a rectangular parallelepiped shape that is hollow and has one surface open. As shown in FIG. 2, the cover 14 constitutes the lower part of the housing body 10, and the open surface is fitted to the open surface of the panel 13. Thus, the accommodation space 11 for accommodating the electronic circuit board 4 can be formed inside the accommodation body 10 by joining the opening surface of the panel 13 and the opening surface of the cover 14. .

  Further, as shown in FIG. 2, the cover 14 has a main body side mounting surface 10 a that faces the open surface and abuts the base body 20. As shown in FIG. 3, a concave portion 14a, a ventilation portion 14b, and a main body side protruding portion 40 are formed at the center of the main body side mounting surface 10a.

  The concave portion 14a is formed by raising the center of the cover-side attachment surface 10a of the cover 14 in a conical shape with the tip cut off. That is, the main body side mounting surface 10a has a concavity 14a that is recessed in a conical shape with the tip cut off when viewed from the base body 20 side. Further, the ventilation portion 14b is formed such that the center of the recess 14a is lowered in a columnar shape. That is, the body-side mounting surface 10a has a ventilation portion 14b that protrudes in a columnar shape at the center of the recess 14a when viewed from the base body 20 side. The ventilation portion 14b is open on the accommodation space 11 side, and the ventilation hole 12 penetrating the center is formed on the base body 20 side.

  Moreover, as shown in FIG. 4, four main body side protrusions 40 are formed on the main body side mounting surface 10a so as to protrude from the recess 14a. The main body side protruding portion 40 is formed and arranged in a shape along a circular locus centered on the vent hole 12. And as shown in the enlarged view of the lower part of FIG. 4, the main body side protrusions 40 are arranged at equal intervals on a circular locus and have four cutouts 41. That is, the main body side protruding portions 40 and the notches 41 are alternately formed on a circular locus centering on the vent hole 12 so as to form a cylindrical shape. In the enlarged view at the bottom of FIG. 4, the vent hole 12 and the like are omitted.

  As shown in FIG. 4, four groove portions 31 (groove portions 31 a, 31 b, 31 c, and 31 d) are formed on the body-side mounting surface 10 a of the cover 14. Each groove 31 extends linearly in four directions from the recess 14a to each side of the body-side mounting surface 10a. In the present embodiment, each groove 31 is formed so as to be perpendicular to each side of the body-side mounting surface 10a, but is not limited thereto.

  Specifically, each groove part 31 is arrange | positioned so that the adjacent groove parts 31 may become perpendicular | vertical. That is, each groove portion 31 is provided so as to extend in four directions from the concave portion 14a so that the adjacent groove portions 31 are perpendicular to the through direction of the vent hole 12.

  The notch 41 is formed so as not to be positioned in the direction from the vent hole 12 toward the groove 31.

  The flow path 30 that communicates between the outside and the accommodation space 11 is configured such that the main body side mounting surface 10a in which the groove portion 31, the concave portion 14a, and the ventilation portion 14b are formed abuts against the base side mounting surface 20a. Formed. The flow path 30 will be described later.

(Internal pressure adjusting filter 15)
The internal pressure adjusting filter 15 is a circular filter having air permeability, and can adjust a pressure difference from the outside. The internal pressure adjusting filter 15 is attached so as to be in close contact with the open surface of the ventilation portion 14b. That is, the internal pressure adjusting filter 15 is provided so as to cover the accommodation space 11 side of the vent hole 12.

(Packing 16)
As shown in FIG. 3, the packing 16 is formed of a square-shaped rubber member. As shown in FIG. 2, the packing 16 is sandwiched between the panel 13 and the cover 14. Thereby, the packing 16 prevents the fluid from entering the housing space 11 from the outside at the joint portion of the panel 13 and the cover 14.

  As described above, the housing body 10 is formed on the body-side mounting surface 10a for mounting the base body 20, the housing space 11 formed therein, and the body-side mounting surface 10a side, and the housing space 11 communicates with the outside. The air hole 12 and the groove 31 are provided.

(Configuration of housing case 1: base body 20)
Next, the configuration of the base body 20 will be described. The base body 20 has a base side mounting surface 20a against which the main body side mounting surface 10a abuts. That is, the base body 20 is detachably attached to the housing main body 10 with the base side mounting surface 20a in contact with the main body side mounting surface 10a.

  As shown in FIGS. 2 and 4, four base body side protrusions 50 and two alignment protrusions 21 protrude from the base side mounting surface 20 a. The base body side protruding portion 50 is formed and arranged in a shape along a circular locus centering on the vent hole 12. And the base body side protrusion part 50 is arrange | positioned at equal intervals on the circular locus | trajectory as shown in the enlarged view of the lower part of FIG. That is, the base body side protrusions 50 and the cutouts 51 are alternately formed on a circular locus centering on the vent hole 12 so as to form a cylindrical shape. And the circular locus | trajectory in which the base body side protrusion part 50 is formed and arrange | positioned is made larger than the circular locus | trajectory in which the main body side protrusion part 40 is formed and arrange | positioned. The notch 51 is formed so as not to be positioned in the direction from the vent hole 12 toward the groove 31.

  As shown in FIG. 4, the alignment projection 21 is formed so as to protrude in the vertical direction with respect to the base-side mounting surface 20a. As shown in FIG. 4, two protrusions 21 for alignment are formed on the base-side mounting surface 20a. The widths of the two alignment projections 21 are formed so as to fit into the groove portions 31 a and 31 d when the base body 20 is attached to the housing main body 10. Accordingly, the housing case 1 can be easily positioned when the housing case 1 is attached to the base body 20 by engaging the groove portion 31a and the groove portion 31d with the alignment protrusions 21.

  Further, as shown in FIG. 3, the base-side mounting surface 20a has two through holes, and the screw member is inserted into the through-hole to form two screws formed on the main body-side mounting surface 10a. The housing body 10 can be attached to the base body 20 by being screwed into the hole. In addition, this screw hole does not penetrate the main body side mounting surface 10a, but has a screw hole member fitted in a recess formed in the main body side mounting surface 10a. Therefore, the fluid does not enter the accommodation space 11 through the screw hole.

  Further, as shown in FIG. 2, the base body 20 has a fixing portion 22 and a fixing hole 23. The fixing portions 22 are respectively formed on the central outer sides of the two opposing sides of the base side mounting surface 20a. That is, each fixing portion 22 is formed so as to protrude in the horizontal direction from the base-side mounting surface 20a.

  The fixing hole 23 is a through hole formed at the center of each fixing portion 22. The housing case 1 can be fixed by inserting a screw member into each fixing hole 23 and screwing it into a horizontal platform or the like in the ship. In the present embodiment, after the base body 20 is attached to the housing main body 10, the housing case 1 is installed in a ship or the like, but is not limited thereto. For example, after the base body 20 is installed in a ship or the like, the storage body 10 may be attached to the base body 20.

  As described above, the panel 13, the cover 14, and the base body 20 constituting the housing case 1 are formed so as to be raised, lowered, or protruded so as to be raised in a vertical direction. Yes. As a result, each configuration can be molded without requiring undercutting, and can be manufactured at low cost.

  In the present embodiment, the panel 13, the cover 14, and the base body 20 are made of plastic, but are not limited thereto. For example, metal or the like may be used.

(Configuration of housing case 1: flow path 30)
Here, the flow path 30 formed by contact of the main body side mounting surface 10a and the base side mounting surface 20a will be described. The flow path 30 is comprised by the groove part 31, the recessed part 14a, and the base side attachment surface 20a which were formed in the main body side attachment surface 10a. Specifically, as shown in FIG. 5, the flow path 30 is formed by a gap formed by the groove portion 31 and the concave portion 14a on the contact surface between the main body side mounting surface 10a and the base side mounting surface 20a. The concave portion 14 a forms a gap for allowing the accommodation space 11 to ventilate through the vent hole 12 at the center of the corresponding contact surface. Moreover, the groove part 31 forms the clearance gap which connects the clearance gap which the recessed part 14a forms, and the storage case 1 exterior. Thus, the flow path 30 is formed by contact of the main body side mounting surface 10a and the base side mounting surface 20a, and communicates the outside of the housing case 1 and the vent hole 12. Hereinafter, a direction from the outside of the flow path 30 toward the vent hole 12 is referred to as a communication direction.

  As described above, in the present embodiment, each groove 31 is formed in four directions from the recess 14a to each side of the body-side mounting surface 10a (see FIG. 4). Channels 30a, 30b, 30c, and 30d) are formed. That is, the flow path 30 is provided so that adjacent to each other in four directions from the vent hole 12 extend perpendicularly to each other. For this reason, even when the fluid enters any of the flow paths 30, the fluid can be easily discharged from the flow paths 30 in other directions.

  Here, the main body side protrusion 40 and the base body side protrusion 50 formed in the flow path 30 will be described.

  As shown in FIG. 5, the main body side protruding portion 40 protrudes toward the base body 20 from the flow channel surface on the housing main body 10 side in the flow channel 30 formed as described above. That is, the main body side protruding portion 40 is formed so as to protrude toward the base body 20 side from the concave portion 14 a constituting the accommodation main body 10 side of each flow path 30. Therefore, in the present embodiment, the main body side protruding portion 40 is formed integrally with the cover 14 of the housing main body 10. As described above, the main body side protruding portion 40 of each flow path 30 is formed and arranged in a shape along a circular locus having the vent hole 12 as a central axis.

  The base body side protruding portion 50 protrudes from the flow path surface on the base body 20 side in the flow path 30 formed as described above toward the housing body 10 side. That is, the base body side protruding portion 50 is formed to protrude from the base side mounting surface 20a toward the housing body 10 side in the gap formed by the concave portion 14a in each flow path 30. Therefore, in this embodiment, the base body side protrusion 50 is formed integrally with the base body 20. Note that, as described above, the circular locus on which the base body side protruding portion 50 is formed and arranged is larger than the circular locus on which the main body side protruding portion 40 is formed and arranged. The main body side protruding portion 40 is arranged at a position different from the arrangement position.

  Further, the base body side protruding portion 50 protrudes so that the position of the tip is closer to the housing body 10 side than the position of the tip of the main body side protruding portion 40 in the vertical direction.

  Further, it is desirable that the distance D1 (see FIG. 5) in the communication direction between the base body side protruding portion 50 and the main body side protruding portion 40 is narrowed to some extent. For example, the distance D1 may be narrower than the vertical height D2 (see FIG. 5) of the approach path region 33 described later.

  A specific configuration of the flow path 30 formed as described above will be described. As shown in FIG. 5, the flow path 30 has an opening 32, an approach path area 33, an enlarged area 34, and a vent hole area 35.

  The opening 32 allows an external fluid to enter and is formed at the center of the bottom of the side surface of the cover 14. The approach path area 33 is an area formed such that the cross section extends in a square shape in the communication direction from the opening 32 toward the vent hole 12.

  The enlarged region 34 is a region formed so that the approach path region 33 extends in the communication direction. In addition, the enlarged region 34 has a recess 14a formed on the body-side mounting surface 10a of the cover 14, so that the cross-sectional area of the flow channel 30 is the flow passage cross-sectional area of the entrance passage region 33 and a later-described vent hole region 35. Rather than being expanded vertically. The main body side protrusion 40 and the base body side protrusion 50 are formed in the enlarged region 34. The ventilation hole area 35 is an area where the ventilation portion 14b is formed.

  Thus, the storage case 1 can simply configure the flow path 30 by simply bringing the storage body 10 and the base body 20 into contact with each other. That is, since it is unnecessary to form the housing main body 10 or the like through the flow path 30 in which the main body side projecting portion 40 and the base body side projecting portion 50 are projected, each configuration of the housing case 1 is easily formed. be able to. Thereby, the storage case 1 can be manufactured at low cost. Hereinafter, a specific operation of the fluid in the flow path 30 of the housing case 1 will be described.

(Operation of fluid in flow path 30 of housing case 1)
As described above, when the storage case 1 is attached to the ship 200, the fluid is transferred to the storage case 1 due to waves when the ship 200 is on the sea and water spray when cleaning the installation environment of the storage case 1. There is a possibility of entering. Here, the operation of the fluid in the flow path 30 of the housing case 1 will be described.

(Low speed operation)
First, the storage case 1 limits the approach path to the vent hole 12 to only the opening 32 of the flow path 30. Thereby, even when the jet of the fluid hits the housing case 1, only the fluid that enters the housing case 1 can hit the opening 32. As a result, the protection performance against an external jet can be improved.

  Next, an operation for reducing the flow velocity of the fluid entering from the opening 32 will be described. In addition, the arrow in FIGS. 6-9 shows the advancing direction of a fluid.

  An operation in the vertical direction of the fluid in the flow path 30 will be described. As shown in FIG. 6, in the flow path 30, the cross-sectional area of the flow path 30 is enlarged in the vertical direction in the enlarged region 34. As a result, the fluid that has entered from the opening 32 and progressed through the approach path region 33 is dispersed in a fan shape in the expansion direction when it reaches the expansion region 34, as shown in FIG. That is, the fluid in the enlarged region 34 of the flow path 30 is dispersed in the expansion direction because the flow path expands rapidly, and the flow velocity is reduced.

  Next, the operation of a part of the fluid that has entered the enlarged region 34 will be described. As shown in FIG. 7, the main body side protruding portion 40 and the base body side protruding portion 50 protrude from the enlarged region 34 in the flow path 30 at different positions in the communication direction. Since the base body side protruding portion 50 is formed closer to the opening 32 in the communication direction than the main body side protruding portion 40, the fluid collides with the base body side protruding portion 50 and then the main body side protruding portion 40.

  As a result, a part of the fluid colliding with the main body side protrusion 40 is changed in the direction of the base body 20, and a part of the fluid colliding with the base body side protrusion 50 is changed in the direction of the accommodation main body 10 ( (See arrow in FIG. 7). Then, a part of the fluid whose course is changed in the direction including the components in the opposite directions by the projecting portions 40 and 50 collide with each other. As a result, the flow rate of the fluid entering from the outside decreases, and the progress of the fluid can be stopped before flowing into the accommodation space 11 through the vent hole 12.

  Further, the base body side protruding portion 50 protrudes so that the position of the tip is closer to the housing body 10 side than the position of the tip of the main body side protruding portion 40 in the vertical direction. That is, as shown in FIG. 7, the flow path from the enlarged region 34 to the vent hole region 35 is formed to be bent in a crank shape.

  Thereby, the fluid which goes to the ventilation hole 12 through between the base body side protrusion part 50 and the main body side protrusion part 40 can be decreased. That is, since the main body side protruding portion 40 and the base body side protruding portion 50 are provided such that the tips thereof overlap each other when the flow channel 30 is viewed from the communication direction, the fluid that has entered the flow channel 30 is in the two protruding portions 40. -The possibility of colliding with at least one of 50 can be increased. As a result, the possibility that the fluid enters from the vent hole 12 can be further reduced.

  In this way, the fluids collide with each other to reduce the flow velocity, and the fluids toward the vent holes 12 are reduced. As a result, even if the fluid is a strong jet, the flow velocity of the fluid is reduced and the possibility of the fluid entering the vent hole 12 is reduced.

  Next, the operation in the horizontal direction parallel to the main body side mounting surface 10a of the fluid in the flow path 30 will be described. As shown in FIG. 8, in the flow path 30, the flow path cross-sectional area in the horizontal direction is larger than that of the approach path area 33 in the enlarged area 34. Further, the main body side protruding portion 40 and the base body side protruding portion 50 are formed and arranged in a shape along a circular locus centering on the vent hole 12. That is, the vent hole 12 is formed so as to be surrounded by the main body side protruding portion 40 and the base body side protruding portion 50.

  Thereby, as shown in FIG. 8, the course of the fluid can be changed in the circumferential direction of the main body side protruding portion 40 and the base body side protruding portion 50, which is different from the communication direction toward the vent hole 12 of the flow path 30. As a result, the possibility that the fluid enters the vent hole 12 is reduced.

  Thus, the main body side protruding portion 40 and the base body side protruding portion 50 protrude into the flow path 30. Both projecting portions 40 and 50 function as a course changing unit that changes the communication direction of a part of the fluid that flows in the flow path 30 and a part of the fluid that flows in the flow path 30. It has a function as a backflow collision part which changes the course in a direction including a component in the reverse direction with respect to the communication direction of the fluid whose course has been changed by the changing section. That is, the flow path 30, the main body side protruding portion 40, and the base body side protruding portion 50 have a function as a fluid flow velocity reduction structure. Accordingly, the marine electronic device 100 of the present embodiment includes the fluid flow velocity reduction structure and the electronic circuit board 4 accommodated in the accommodation space 11 communicated with the other end of the flow path 30 of the flow velocity reduction structure. Yes.

  Here, the “course changing portion” refers to a portion formed in the flow path so as to project part of the fluid flowing in the flow path so as to change the course. Further, the “backflow collision part” refers to a part formed so as to change the course of a part of the fluid that has traveled while avoiding the “course changing part”. The “course changing part” and the “backflow collision part” may be formed in the flow path by attaching parts separate from the flow path, or may deform a part of the flow path. It may be formed integrally with the flow path. In the case of a separate body, the shape and location of the "backflow collision part" and "route changing part" can be changed relatively freely, so the flow velocity reduction structure has the optimum shape and positional relationship for various conditions. It can be. On the other hand, in the case of integration, a flow velocity reduction structure suitable for mass production can be obtained.

(Discharge operation)
Next, the operation of discharging the fluid that has entered the housing case 1 will be described. FIG. 9 is an explanatory diagram for explaining the discharge operation of the fluid that has entered the flow path 30. As shown in FIG. 9, flow paths 30a, 30b, 30c, and 30d corresponding to the four groove portions 31a, 31b, 31c, and 31d are provided.

  As shown in FIG. 9, when the jet hits the opening of the flow path 30 b and the fluid enters the flow path 30 b, the fluid is, as described with reference to FIG. The course is changed in the circumferential direction of the base body side protruding portion 50. As shown in FIG. 9, a part of this fluid is moved in the direction of the flow paths 30a and 30c, and is discharged from the openings of the flow paths 30a, 30c, and 30d.

  In addition, as described with reference to FIG. 7, there is a possibility that a part of the fluid whose flow velocity is reduced reaches the vent hole region 35. In this case, the main body side protruding portion 40 and the cutout portion 41 and the notch portion 51 (see FIG. 4) provided in the base body side protruding portion 50 move in the direction from the vent hole region 35 to the enlarged region 34, respectively. Is done. Then, the fluid moved to the vent hole region 35 is moved to the enlarged region 34 and discharged from the openings of the flow paths 30a, 30c, and 30d.

(Outline of this embodiment)
As described above, the storage case 1 of the present embodiment includes the main body side mounting surface 10a, the storage space 11 formed inside, and the communication path formed on the main body side mounting surface 10a and communicating the storage space 11 to the outside. A housing body 10 having pores 12, a base-side mounting surface 20a that comes into contact with the body-side mounting surface 10a, a base body 20 that is detachably attached to the housing body 10, and a body-side mounting surface 10a A channel 30 formed by contact with the base-side mounting surface 20a and communicating with the outside and the vent hole 12, and a main body protruding toward the base body 20 from the channel surface on the housing body 10 side in the channel 30 The side protrusion 40 and the main body side protrusion 40 in the communication direction of the flow path 30 are disposed at different positions and protrude from the flow path surface of the flow path 30 on the base body 20 side toward the housing body 10 side. The It is configured to have a base side projection portion 50.

  According to the above configuration, the storage case 1 has the flow path 30 formed by the contact between the main body side mounting surface 10a of the main body 10 and the base side mounting surface 20a of the base body. That is, since it is unnecessary to form the housing main body 10 or the like through the flow path 30 in which the main body side projecting portion 40 and the base body side projecting portion 50 are projected, each configuration of the housing case 1 is easily formed. be able to. Thereby, the storage case 1 can be manufactured at low cost. Since the flow path 30 of the housing case 1 communicates with the outside and the vent hole 12, the air inside the housing space 11 can flow freely through the flow path 30. Thereby, the flow path 30 can be used as the ventilation path of the accommodation space 11.

  In addition, since air from outside can flow freely through the flow path 30, there are cases where water contained in the air enters the flow path 30 and water and seawater that have momentum from the outside. When such a fluid such as water or seawater enters the channel 30 from the outside, the fluid proceeds toward the communication direction vent hole 12 side of the channel 30. Since the main body side projecting portion 40 and the base body side projecting portion 50 project at different positions in the communication direction in the flow path 30, the fluid is either the base body side projecting portion 50 or the main body side projecting portion 40. After colliding, it collides with the other protrusion. As a result, a part of the fluid colliding with the main body side protrusion 40 is changed in the direction of the base, and a part of the fluid impinging on the base side protrusion 50 is changed in the direction of the accommodating main body 10. Then, a part of the fluid whose course is changed in the direction including the components in the opposite directions by the projecting portions 40 and 50 collide with each other. As a result, the flow rate of the fluid entering from the outside decreases, and the progress of the fluid can be stopped before flowing into the accommodation space 11 through the vent hole 12. Thereby, the accommodation case 1 can ventilate the accommodation space 11 and can reduce the possibility of entry of water or the like into the accommodation space 11 even for a strong jet.

  In addition, the flow path 30 of the storage case 1 of the present embodiment is provided with the main body side protruding portion 40 and the base body side protruding portion 50, and the flow path cross-sectional area is larger than that of the other portion of the flow path cross-sectional area. The enlarged region 34 is enlarged in the direction facing the base body 20.

  According to the above configuration, the flow path 30 is provided with the main body side protruding portion 40 and the base body side protruding portion 50, and the flow path cross-sectional area is larger than the flow path cross-sectional area of the other part. It has the expansion area | region 34 expanded in the opposing direction. Thereby, when the fluid that travels in the communication direction in the flow path 30 reaches the enlarged region 34 of the flow path 30, the flow velocity is reduced by increasing the cross-sectional area of the flow path. A part of the fluid dispersed in the expansion direction of the expansion region 34 and having a reduced flow velocity collides with both projecting portions 40 and 50 in the distribution direction and is changed in course. Thereafter, the flow velocity can be further reduced by the collision of part of the fluid whose course has been changed. Thereby, the possibility of entry of water or the like into the accommodation space 11 can be further reduced.

  In addition, the base body side protruding portion 50 of the storage case 1 of the present embodiment has a distal end position closer to the storage body 10 side than the position of the front end of the main body side protruding portion 40 in the opposing direction of the storage body 10 and the base body 20. It is configured to protrude.

  According to the above configuration, the base body side protruding portion 50 protrudes so that the position of the tip is closer to the housing body 10 side than the position of the body side protruding portion 40 tip in the facing direction of the housing body 10 and the base body 20. ing. That is, since the main body side protruding portion 40 and the base body side protruding portion 50 are provided such that the tips thereof overlap each other when the flow channel 30 is viewed from the communication direction, the fluid that has entered the flow channel 30 is in the two protruding portions 40. -The possibility of colliding with at least one of 50 can be increased. As a result, the possibility that the fluid that has entered the flow path 30 proceeds in the direction of the vent hole 12 without colliding with both the protrusions 40 and 50 is reduced, and the possibility of the fluid entering the accommodating space 11 is further increased. Can be reduced.

  Moreover, the flow path 30 of the storage case 1 of this embodiment is comprised by the groove part 31 formed in at least one of the main body side attachment surface 10a and the base side attachment surface 20a.

  According to the above configuration, the groove portion 31 formed in at least one of the main body side mounting surface 10 a and the base side mounting surface 20 a forms the flow path 30. Thereby, the groove part 31 is formed in at least one of the main body side mounting surface 10a and the base side mounting surface 20a, and the housing main body 10 in which the main body side protruding part 40 is formed is replaced with the base body 20 in which the base body side protruding part 50 is formed. The flow path 30 can be formed with a simple configuration of mounting. As shown in the present embodiment, the flow path 30 is simply formed by bringing the flat base-side mounting surface 20a into contact with the main body-side mounting surface 10a in which the groove 31 is formed.

  In addition, at least one of the housing main body 10 and the base body 20 of the housing case 1 of the present embodiment protrudes from the flow path surface in the opposing direction of the housing main body 10 and the base body 20 and fits into the groove 31. 21.

  According to the above configuration, the positioning projection 21 of at least one of the housing body 10 and the base body 20 protrudes from the flow path surface in the opposing direction of the housing body 10 and the base body 20 and fits into the groove portion 31. When the main body 10 is attached to the base body 20, the housing main body 10 can be easily positioned with respect to the base body 20. As a result, by using the groove portion 31 for positioning, it becomes unnecessary to add a configuration for positioning to the housing body 10 and the base body 20.

  In addition, the flow path 30 of the housing case 1 of the present embodiment is configured such that adjacent ones in the four directions from the vent hole 12 extend perpendicular to each other.

  According to the above configuration, in the flow path 30, the adjacent ones in the four directions from the vent hole 12 extend perpendicular to each other. As a result, even if the fluid enters any one of the four flow paths 30, the fluid can be easily discharged from the other flow paths 30. In addition, the flow velocity can be similarly reduced regardless of the direction of the jet flow.

  In addition, at least one of the main body side protruding portion 40 and the base body side protruding portion 50 of each flow path 30 of the storage case 1 of the present embodiment is formed and arranged in a shape along a circular locus centering on the vent hole 12. It is configured.

  According to the above configuration, at least one of the main body side protruding portion 40 and the base body side protruding portion 50 of each flow path 30 is formed and arranged in a shape along a circular locus centering on the vent hole 12. Thereby, the course of the fluid can be changed in a direction different from the direction of communication toward the vent hole 12 of the flow path 30. As a result, the fluid toward the vent hole 12 can be reduced, and the possibility of the fluid entering the housing space 11 can be further reduced.

  In addition, the flow velocity reduction structure of the fluid according to the present embodiment includes a flow channel 30 that is open at one end so that an external fluid can enter, and a fluid that protrudes into the flow channel 30 and flows through the flow channel 30. A course changing section (either one of the main body side projecting section 40 and the base body side projecting section 50) that changes the course of a part of the communication direction, and one fluid that projects into the flow path 30 and flows through the flow path 30. A reverse flow collision portion (either one of the main body side protruding portion 40 and the base body side protruding portion 50) that changes the direction of the portion in a direction that includes a component in the direction opposite to the communication direction of the fluid that has been changed in path by the route changing portion; It has the composition which has.

  According to the above configuration, when a fluid enters the opening of the flow channel 30 from the outside, a part of the communication direction of the fluid is routed by the route changing portion protruding in the traveling direction of the fluid flowing in the flow channel 30. Be changed. In addition, the reverse flow collision unit changes the course of a part of the fluid flowing in the flow path 30 in a direction including a component in the reverse direction with respect to the communication direction of the fluid changed in course by the course change unit. Collide.

  Thereby, the flow velocity of both fluids can be made small by colliding a part of fluid changed the course by the course change part and a part of fluid changed the course by the backflow collision part. As a result, even when the fluid enters the flow path 30, the flow rate of the fluid flowing through the flow path 30 can be reduced.

  In addition, the marine electronic device 100 of the present embodiment is configured to include the housing case 1 and the electronic circuit board 4 housed in the housing space 11 of the housing case 1.

  According to the above configuration, the storage case 1 can reduce the possibility of water or the like entering the storage space 11. As a result, it is possible to protect the electronic circuit board 4 in the accommodation space 11 from waves, splashing water when cleaning the installation environment of the marine electronic device 100, and the like.

  Further, the marine electronic device 100 according to the present embodiment includes the flow velocity reduction structure (the housing case 1, the main body side protruding portion 40, and the base body side protruding portion 50) of the fluid and the flow path of the fluid velocity reduction structure. The electronic circuit board 4 is housed in a housing space 11 communicated with the other end.

  According to the above configuration, the fluid flow velocity reduction structure can reduce the flow velocity of the fluid entering the flow path from the outside. Thereby, the possibility that a fluid such as water entering from the opening of the flow path reaches the electronic circuit board 4 accommodated in the accommodation space 11 can be reduced. As a result, the electronic circuit board 4 in the accommodation space 11 can be protected from fluids such as waves and splashes during cleaning.

(Modification of this embodiment)
The embodiments of the present invention have been described above, but only specific examples have been illustrated, and the present invention is not particularly limited. Specific configurations and the like can be appropriately changed in design. It should be noted that the actions and effects described in the embodiments of the present invention are merely a list of the most preferable actions and effects resulting from the present invention, and are limited to those described in the embodiments of the present invention. is not.

  Further, the fluid flow velocity reduction structure and the housing case of the present embodiment may be modified, added, or overlapped with the following configurations in the above-described embodiments.

  In the present embodiment, the flow path 30 is formed by attaching the housing case 1 to the base body 20, but the present invention is not limited to this. For example, a flow path 330 that penetrates from the side surface of the storage case 300 to the vent hole 12 may be formed at the bottom of the storage case 300 as in the storage case 300 shown in FIG.

  Moreover, in this embodiment, although the flow path 30 was formed in four directions from the vent hole 12 in the horizontal direction, it is not limited to this. The number of flow paths, the formation angle, and the like are not limited to this. For example, two flow paths 30 may be formed in two directions so as to form a straight line, or adjacent flow paths form 120 degrees. It may be formed in three directions.

  In addition, for example, as in the case 400 shown in FIG. 11, as an alternative to the base body 20 of the present embodiment, the seal member 401 is attached to form the flow path 430 at the bottom of the case 400. Good. Alternatively, the seal member 401 may be directly attached to a flat table or the like without using the seal member 401. In this case, you may use the protrusion 440 which has a function as a course change part and a backflow collision part.

  Moreover, in this embodiment, although the course change part and the backflow collision part which comprise the flow velocity fall structure were each formed as the main body side protrusion part 40 and the base body side protrusion part 50, it is not limited to this. For example, as shown in FIG. 12, only the cover-side protrusion 441 that covers the expansion direction may be provided on the cover 14 side as the course changing unit and the backflow collision unit. In this case, the base body 20 may be provided with a base-side recess 442 that engages with the tip of the cover-side protrusion 441.

  Similarly, as shown in FIG. 13, only the base-side protrusion 451 that covers the expansion direction may be provided on the base body 20 side as the course changing unit and the backflow collision unit. In this case, the cover 14 may be provided with a cover-side recess 452 that engages with the tip of the base-side protrusion 451.

  In the present embodiment, the storage case 1 is installed such that the panel 13 is the upper part and the cover 14 is the lower part, but the present invention is not limited to this. For example, the main body side mounting surface 10a of the cover 14 of the present embodiment may be installed so as to be an upper surface, or may be installed so as to be a side surface.

  In the present embodiment, the marine electronic device 100 is formed with the flow path 30, the main body side protruding portion 40, and the base body side protruding portion 50 in the housing case, but is not limited thereto. For example, the marine electronic device may be one in which the electronic circuit board is accommodated in an accommodation space formed in the ship, and a course changing portion and a backflow collision portion are formed in a flow path that communicates the outside with the accommodation space. . Thereby, while accommodating the electronic circuit board which a ship has so that ventilation is possible, an internal electronic circuit board can be protected from fluids, such as a wave and the splash at the time of cleaning.

  The present invention can be used for all structures having air permeability and protection performance against strong jets.

DESCRIPTION OF SYMBOLS 1 Accommodating case 4 Electronic circuit board 10 Accommodating main body 10a Main body side mounting surface 11 Accommodating space 12 Vent hole 20 Base body 20a Base side mounting surface 21 Alignment projection 30 Channel 31 Groove 34 Expanded area 40 Main body side projection 50 Base Body side protrusion 100 Marine electronics

Claims (10)

A housing body having a body-side mounting surface, a housing space formed therein, and a vent hole formed in the body-side mounting surface and communicating the housing space with the outside;
A base body that has a base-side mounting surface that is in contact with the main body-side mounting surface, and is detachably mounted to the housing body;
A flow path formed by abutment between the body-side mounting surface and the base-side mounting surface and communicating between the outside and the vent hole;
A main body side protruding portion that protrudes toward the base body from the flow path surface on the accommodating main body side in the flow path;
A base-body-side protruding portion that is disposed at a position different from the arrangement position of the main-body-side protruding portion in the communication direction of the flow path, and protrudes from the flow path surface on the base body side in the flow path toward the housing main body side; A housing case characterized by comprising: The flow path is
The main body side projecting portion and the base body side projecting portion are disposed, and the flow passage cross-sectional area has an enlarged portion that is enlarged in the opposing direction of the housing main body and the base body than the flow passage cross sectional area of other portions. The housing case according to claim 1, wherein the housing case is formed. The base body side protrusion is
3. The protrusion according to claim 1, wherein the position of the tip protrudes so as to be closer to the housing body than the position of the tip of the body-side protruding portion in the facing direction of the housing body and the base body. The described storage case.   The storage case according to any one of claims 1 to 3, wherein the flow path is configured by a groove formed in at least one of the main body side mounting surface and the base side mounting surface.   The at least one of the accommodation main body and the base body has an alignment projection that protrudes from the flow path surface in the facing direction of the accommodation main body and the base body and fits into the groove. 4. The storage case according to 4.   6. The storage case according to claim 1, wherein the channel is adjacent to each other in the four directions from the air hole in a direction perpendicular to each other.   The at least one of the main body side projecting portion and the base body side projecting portion of each flow path is formed and arranged in a shape along a circular locus centering on the vent hole. The described storage case. A flow path having one end opened so that an external fluid can freely enter;
A course changing section that projects into the flow path and changes the communication direction of a part of the fluid flowing in the flow path;
Backflow collision that projects into the flow path and changes a part of the fluid flowing in the flow path in a direction including a component in a direction opposite to the communication direction of the fluid changed in the path by the path changing unit. And a flow velocity reduction structure of a fluid. A housing case according to any one of claims 1 to 7,
A marine electronic device having an electronic circuit board housed in the housing space of the housing case. The flow velocity reduction structure of the fluid according to claim 8,
A marine electronic device comprising: an electronic circuit board housed in a housing space communicated with the other end of the flow path of the fluid flow velocity lowering structure.

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