JP2019046841A - Waterproof housing and packing member - Google Patents

Abstract

To provide a waterproof housing capable of simplifying a packing sticking process while maintaining waterproofness.SOLUTION: A waterproof housing includes: a base part 11 having an annular flange; and a lid 12 brought into close contact with the base part with a packing member 13 interposed therebetween and having a corresponding annular flange 12F defining a housing space. The packing member 13 comprises a plurality of strips coupled annularly. Adjacent coupling portions of the strips have a complementary concave and convex shape to each other, and complementary concave and convex shaped portions of the coupling portions are fitted to each other.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a case, and more particularly to a waterproof structure and a packing member of a waterproof case installed outdoors.

  In an electronic device exposed to outdoor rain water, a rectangular parallelepiped case sealed using a packing is generally adopted for the purpose of waterproofing the electronic circuit (Patent Document 1).

JP, 2015-090578, A

  The conventional electronic device described in Patent Document 1 has a structure in which the rectangular annular packing is sandwiched between the housing and the opening of the door, and the door is fixed to the opening of the housing with a lock.

  In the manufacture of the conventional waterproof case, it is necessary to attach an annular packing along the case opening. However, since the thickness of the packing itself is several mm, distortion or deformation is likely to occur in the packing during the process of attaching the packing to the opening. When a portion of distortion or deformation remains, the thickness and hardness of the packing only change, and the packing can not be uniformly compressed, and there is a problem that waterproofness can not be secured. In addition, there is also a problem that it takes assembly time to correct distortion and deformation at the time of affixing process.

  The present invention has been made in view of the above-described problems of the prior art, and an object of the present invention is to provide a waterproof housing and a packing member capable of simplifying a packing application process while maintaining waterproofness.

The waterproof case of the present invention is a waterproof case having a base portion having an annular flange, and a lid body having a corresponding annular flange closely attached by interposing a packing member on the annular flange and defining a storage space. ,
The packing member is composed of a plurality of annular bands connected in an annular manner,
The connecting portions adjacent to each other in the strip have complementary uneven portions having complementary uneven shapes,
The said complementary uneven | corrugated shaped part of the adjacent connection part of the said strip | belt-shaped body mutually fits.

  According to the waterproof case of the present invention, in the packing member consisting of a plurality of strip-shaped members, the complementary concavo-convex shaped portions of the adjacent connecting portions of the adjacent strip-shaped members are fitted to each other to maintain waterproofness. It becomes possible to realize a waterproof case that can simplify the process of attaching the packing.

It is the perspective view seen from the lid side which shows the external appearance of the housing of the electronic device which is Example 1 by this invention. FIG. 5 is a perspective view of a packing member made of a band-like body of Example 1; It is a fragmentary sectional view (a) of a partial top view (a) of a portion of A shown with a dashed dotted line of a corner of a case of Example 1 of Drawing 1, and a fragmentary sectional view of line xx of the partial top view. It is a perspective view explaining the assembly process of the housing | casing of a present Example. It is a perspective view explaining the assembly process of the housing | casing of a present Example. It is a perspective view explaining the assembly process of the housing | casing of a present Example.

  Hereinafter, the waterproof case of the outdoor installation electronic device according to the embodiment of the present invention will be described in detail with reference to the drawings. The present invention is not limited to the following examples. In the embodiments, constituent elements having substantially the same function and configuration are denoted by the same reference numerals and redundant description will be omitted.

  FIG. 1 is a perspective view showing the appearance of the case 10 of the electronic device according to the first embodiment, as viewed from the lid side. FIG. 2 is a perspective view showing the packing member 13 of the case of the electronic device.

  As shown in FIG. 1, the waterproof casing 10 of the embodiment has a substantially rectangular shape. The housing 10 is composed of a plate-like base portion 11 and a cylindrical box-like lid 12, which are joined to each other through packing members 13 at their respective flange portions.

  The base portion 11 has the circuit board assembly 14 fixed substantially at the center thereof, and has an annular flange 11 F at the peripheral end surrounding the circuit board assembly 14.

  The lid 12 has flanges 12F (annular flanges corresponding to the flanges 11F) which are annular to project outward from the side wall of the open end face. The base 11 and the flanges 11F and 12F of the lid 12 are joined via the packing member 13 to seal the circuit board assembly 14 such as an antenna device inside the center of the base 11 and the lid 12. A storage space SP is defined. In addition, the base part 11 is not limited to plate shape, A cylindrical box shape shape may be sufficient. Further, the flange portions of the base portion 11 and the lid 12 are not limited to a flat shape, and the flange portions may be provided with stepped portions of complementary shapes.

  As shown in FIG. 2, the packing member 13 in the waterproof housing of the embodiment is constituted of a plurality of strip-like members 13a and 13b of a constant thickness connected in an annular shape. Adjacent end portions of each of the strip-shaped members 13a and 13b have a complementary uneven portion CPL having complementary uneven shapes. The complementary uneven shape is a shape in which the end surface of the strip-like members 13a and 13b can be fitted closely. For example, the complementary uneven shape includes a meandering shape, a zigzag shape, and a rectangular wave shape in a plan view of the flange surface. The complementary concavo-convex shaped portions CPL of the adjacent end portions (connection portion, joint) of the strip-like members 13a and 13b are fitted to each other.

  The outer shell of the flange 11F, the packing member 13 and the flange 12F has a rectangular shape, and the packing member 13 also has a rectangular shape. Adjacent end portions (complementary uneven portions CPL) of the band-like members 13a and 13b of the packing member 13 are located at the corners of the rectangular shape of the flange 11F and the flange 12F. Thereby, in the housing assembly process, the complementary uneven portion CPL serves as a reference for alignment, which contributes to the improvement of the work efficiency of the affixing process.

  For example, as shown in FIG. 3A, the complementary concave and convex portion CPL has a crank shape, and the complementary concave and convex portion CPL adjacent to the strips 13a and 13b is a crank-like water channel 13c (a complementary concave and convex portion in the figure The region between the broken line and the alternate long and short dash line of the portion CPL is formed.

  A water channel corner 13d for storing water as a water reservoir space is provided between the complementary uneven portions CPL at the adjacent end portions of the strip members 13a and 13b. Furthermore, as shown in FIG. 3 (b), the base portion 11 has a drainage hole 17 for draining the water accumulated at the water channel corner portion 13 d to the outside.

  In this embodiment, the lid 12 functions as an exterior cover, and an external feeder cable or an input cable for operating the circuit board assembly 14 accommodated in a part of the plate-like portion excluding the flange of the base portion 11. There are provided connection holes (not shown) for passing the wiring such as the output cable. In addition, a control device (not shown) connected to the wiring can be fixed to the opposite side of the lid 12 of the base portion 11.

  The base portion 11 and the lid 12 are fastened by screws Sc (FIG. 1) and fixed to each other in a state in which the packing member 13 is sandwiched and joined between the facing surfaces of the flanges 12F and 11F. Removal of the lid 12 from the base 11 allows access to the circuit board assembly 14 inside the housing.

  The material of the packing member 13 includes hydrogenated nitrile rubber, fluorocarbon rubber (FKM), silicone rubber (VMQ), ethylene propylene rubber (EPDM), urethane rubber (U), fluorocarbon resin Teflon (registered trademark) (PTFE), Resins, such as polyamide (PA), polyethylene (PE), polyacetal (POM), and rubber are mentioned.

  Examples of the resin material for housing include ABS (acrylonitrile butadiene styrene), PC (polycarbonate), ASA (acrylate styrene acrylonitrile), AES (acrylonitrile ethylene-propylene-diene styrene), ABS-PC and the like. Also, the base portion of the housing may be formed using a metal material.

  First, as shown in FIG. 4, in the component arranging step, the circuit board assembly 14 is provided in the central region of the base portion 11 having the screw holes h via the post 11a. Are fixed with screws Sc.

  Next, as shown in FIG. 5, in the step of attaching the packing, two adjacent ones of the first strip 13a and two of the second strip 13b on the flange 11F of the base portion 11 are adjacent to each other. The packing members 13 are completed by combining and pasting them so that the complementary concavo-convex shaped portions CPL of (connection portion, joint) are fitted to each other.

  Next, as shown in FIG. 6, in the sealing step, the flange 12F of the lid 12 is aligned on the packing member 13 on the flange 11F of the base portion 11, and the lid 12 is disposed. Thereafter, by fixing with a fixed load with the screw Sc, the sealed waterproof housing 10 shown in FIG. 1 is completed. In this embodiment, in order to bring the components into close contact with each other in a planar state between the base portion 11 and the lid 12, the first and second strip-like members 13a and 13b are sandwiched and fixed with the screw Sc. ing.

  In the present embodiment, the types of band-like members are two first band-like members 13a and two second band-like members 13b. Although the packing member is divided into four bands and formed into four bands, the present invention is not limited to this. For example, as a two-band shape of the letter shape of Hiragana "K", combining these, the packing member It may be configured.

  As mentioned above, according to the present Example, since a strip | belt-shaped body is shorter than the packing member completed, the effect of the improvement of bonding workability is acquired.

  Further, as shown in FIG. 3, when water intrudes from the direction of arrow 8 in a state where the first and second band-like members 13 a and 13 b sandwiched by the flanges are combined, the first and second band-like members 13 a , And shut off with a complicated crank-like water channel 13c of 13b to delay the entry of water. Furthermore, water can be temporarily stored at the water channel corner 13d. Furthermore, the water accumulated at the water channel corner portion 13 d can be drained from the water drain hole 17 of the base portion 11. Even when water is flooded, the complementary concavo-convex shaped portions CPL of the connection ends of the band members of the packing member stop water by the crank-shaped water channels fitted to each other, and have the effect of delaying the entry of water.

  In addition, by dividing the annular packing members (multiplying), there is no waste portion of the packing material, and the cost is also reduced. That is, in the conventional packing structure, since the waterproof packing is a ring-shaped integral structure, the sheet material of the central opening is extra when the annular waterproof packing is removed from the resin sheet in the manufacturing process of the waterproof packing. Was wasted. Therefore, in the conventional packing structure, there existed a problem of becoming a factor of the cost increase. However, according to the present embodiment, since the strip can be connected to the necessary part and used, the effect of reducing the manufacturing cost of the packing can be obtained.

DESCRIPTION OF SYMBOLS 10 ... Housing | casing 11 ... Base part 12 ... Lid 13 ... Packing member 13a, 13b ... 1st and 2nd strip | belt-shaped body 13c ... Crank-like water channel 13d ... Water channel corner 14 ... Circuit board assembly 17 ... Water drainage hole Sc …screw

Claims (6)

A waterproof casing comprising: a base portion having an annular flange; and a lid body having a corresponding annular flange closely contacting the annular flange with a packing member interposed therebetween and defining a storage space.
The packing member is composed of a plurality of annular bands connected in an annular manner,
The connecting portions adjacent to each other in the strip have complementary uneven portions having complementary uneven shapes,
The waterproof casing of an electronic device, wherein the complementary uneven portions of adjacent connection portions of the strip-shaped members are fitted to each other.   The waterproof casing of the electronic device according to claim 1, wherein the complementary uneven portion has a crank shape.   The outer flanges of the annular flange, the packing member, and the corresponding annular flange have a rectangular shape, and adjacent connecting portions of the strip are positioned at corners of the rectangular shape of the annular flange and the corresponding annular flange. The waterproof case of the electronic device according to claim 1 or 2.   The waterproof case of the electronic device according to any one of claims 1 to 3, wherein a water reservoir space is provided between the complementary uneven portion of the adjacent connection portion of the strip.   The waterproof case of the electronic device according to claim 4, wherein a drain hole communicating with the water storage space is provided in the base portion. Each adjacent connection part is comprised from the several strip | belt shape which has a complementary uneven | corrugated shaped part which has complementary uneven | corrugated shaped,
A packing member characterized in that the complementary concavo-convex shaped parts of adjacent connection parts of the strip-shaped body are fitted to each other.

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