Assembling structure of waterproof shell

Abstract

And stable waterproof performance and sealing assembly guarantee are obtained. The assembly structure of the waterproof case (10) is a structure in which an annular sealing body (2A) is sandwiched between the portions where bosses (11A, 12A) of one case (11) and the other case (12) which are separated from each other abut against each other, and the bosses (11A, 12A) are fixed together by a screw (1), and comprises: an annular groove (11Ad) which is provided on the abutting surface (11Aa) of the boss (11A) of the one case (11) so as to surround the screw (1), and in which the boss (11A, 12A) of the other case (12) is inserted into the annular groove (11Ad) in the abutting surface (11Aa) of the boss (11A) of the one case (11); the sealing body (2A) is arranged in the annular groove; a plurality of branch grooves (11Ae) which are continuous with the annular groove (11Ad) and extend to the outer side of the annular shape; a tongue piece (2B) which is provided so as to extend to the outside of the ring shape of the sealing body (2A) and which is inserted into each branch groove (11Ae); and a pressing member (3) that is attached to the one housing (11) separately from the one housing (11) and presses the tongue pieces (2B) into the branch grooves (11Ae).

Description

Technical Field

[0001] The invention relates to an assembly structure of a waterproof shell. Background Art

[0002] In the past, for example, Patent Document 1 shows a structure in which an O-ring is embedded in a sealing groove formed concavely near the outer periphery of the mating surface of the housing. The sealing groove is formed with a tongue groove communicating with the outer periphery. The O-ring is formed with a tongue facing outward in a manner that fits in the tongue groove.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application Publication No. 2000-283295. Summary of the invention

[0006] However, in the case of fixing the mating part of the housing by screws, the screw is inserted into an O-ring as an annular gasket, and waterproofing is performed at the position where the head of the screw is tightened. However, in this structure, since the head of the screw is in direct contact with the gasket, the gasket is sometimes stretched or twisted due to the tightening of the screw, and the waterproofing performance is unstable. Therefore, the following structure is envisioned: on the inner side of the docking housing, a boss portion for mounting the screw is arranged in an opposing manner, and the O-ring with the screw inserted is clamped between each docking surface of the two bosses to perform waterproofing. Since the head of the screw does not contact the O-ring, the envisioned structure can obtain stable waterproofing performance. However, in the envisioned structure, after the O-ring is placed on the docking surface of one boss, the position of the O-ring may deviate during the operation of docking the docking surface of the other boss, and this situation cannot be confirmed by visual inspection. As a result, in the envisioned structure, the O-ring may fall off from each docking surface, and there is a problem of reduced stable waterproofing performance and assembly assurance of the seal.

[0007] An object of the present disclosure is to provide an assembly structure of a waterproof housing capable of obtaining stable waterproof performance and ensuring assembly of a sealing member.

[0008] In order to achieve the above-mentioned purpose, the assembly structure of a waterproof shell of one embodiment of the present invention is a structure in which an annular sealing body is clamped at the part where the bosses of each of the separated shell and the other shell are connected, and the bosses are fixed together with screws, and the assembly structure includes: an annular groove, which is provided on the mating surface of the boss of the one shell, and the annular groove is provided in a manner to surround the screw, and the sealing body is configured in the annular groove; a plurality of branch grooves, which are continuous with the annular groove and extend to the outer side of the annular shape; a tongue piece, which extends to the outer side of the annular shape of the sealing body and is inserted into each of the branch grooves; and a pressing component, which is separate from the one shell and installed on the one shell, and presses each of the tongue pieces into each of the branch grooves.

[0009] According to the present disclosure, stable waterproof performance and assembly assurance of the seal can be obtained. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a cross-sectional view of the assembly structure of the waterproof housing involved in the embodiment.

[0011] Figure 2 It is a top view of the assembly structure of the waterproof housing involved in the embodiment.

[0012] Figure 3 It is an enlarged perspective view of the assembly structure of the waterproof housing involved in the embodiment.

[0013] Figure 4 It is an enlarged top view of the assembly structure of the waterproof housing involved in the embodiment. DETAILED DESCRIPTION

[0014] Hereinafter, the mode for implementing the present disclosure (hereinafter referred to as an embodiment) is described in detail with reference to the accompanying drawings. In addition, the present disclosure is not limited to the following embodiments. In addition, the constituent elements in the following embodiments include elements that can be easily thought of by those skilled in the art, substantially the same elements, and so-called elements of equal scope. Furthermore, the constituent elements disclosed in the following embodiments can be appropriately combined.

[0015] The waterproof case 10 according to the embodiment is used for, for example, electronic equipment that requires waterproof performance.

[0016] like Figure 1As shown, the waterproof housing 10 is composed of a separated housing (also called a lower housing) 11 and another housing (also called an upper housing) 12. The waterproof housing 10 accommodates electronic components (substrates in the embodiment) inside by docking and fixing one housing 11 with the other housing 12. One housing 11 is formed with an annular groove 11D along the edge of the annular opening. The other housing 12 is formed with an annular convex portion 12D along the edge of the annular opening. The convex portion 12D is inserted into the groove 11D. In addition, the waterproof housing 10 is provided with an annular gasket 13 such as an O-ring along the groove 11D, and the convex portion 12D is inserted into the groove 11D by pressing the gasket 13, so that one housing 11 is docked with the other housing 12, and waterproof performance is ensured at the docking portion.

[0017] The assembly structure of the embodiment is configured such that, in a state where one housing 11 of the waterproof housing 10 is butted against the other housing 12, bosses 11A and 12A provided on the inner sides of the housings 11 and 12 are fixed by screws 1 via an annular seal 2. The assembly structure of the embodiment ensures waterproof performance at the butted portion between the one housing 11 and the other housing 12, and waterproof performance at the fixing portion of the screws 1.

[0018] The assembly structure includes bosses 11A, 12A, a seal 2 and a pressing component 3 .

[0019] The boss 12A of the other housing 12 is formed to protrude toward the inner side of the other housing 12. The boss 12A has a flat butt joint surface 12Aa at the front end of the column extending toward the one housing 11. In addition, the boss 12A has a threaded hole 12Ac formed with an internal thread 12Ac for screwing the screw 1 on the inner peripheral surface of the hole 12Ab that penetrates the butt joint surface 12Aa and is inserted into the screw 1. The hole 12Ab stays inside the housing 12 and does not penetrate the outside of the housing 12.

[0020] The boss 11A of one shell 11 is formed to protrude toward the inner side of the shell 11. The boss 11A has a flat mating surface 11Aa that is opposite to the mating surface 12Aa of the boss 12A of the other shell 12. In addition, the boss 11A has a hole 11Ab formed in a circular shape and extending from the mating surface 11Aa to the outside of the shell 11. In addition, the boss 11A has a locking surface 11Ac formed around the hole 11Ab on the outside of the shell 11. In addition, the boss 11A has an annular groove 11Ad formed in a circular shape on the mating surface 11Aa so as to surround the hole 11Ab. In addition, the boss 11A has a branch groove 11Ae that extends continuously to the outside of the ring with the annular groove 11Ad and penetrates the outside of the mating surface 11Aa. The groove bottom of the branch groove 11Ae is formed to extend to the outside of the mating surface 11Aa. As shown in FIG. Figure 3 and Figure 4As shown, a plurality of (two in the embodiment) branch grooves 11Ae are formed to extend in different directions. In the embodiment, the branch grooves 11Ae are formed to extend in directions different by 90 degrees from the circular center of the annular groove 11Ad (hole 11Ab).

[0021] In addition, a plate-shaped substrate as the pressing member 3 is fixed to one housing 11. One housing 11 has an abutting surface 11B disposed toward the other housing 12 so as to abut against one plate surface of the pressing member 3. In addition, one housing 11 has a protrusion-shaped positioning portion 11C inserted into the through hole 3A formed in the pressing member 3.

[0022] The seal 2 is a so-called gasket. The seal 2 is formed of a rubber material or the like. The seal 2 has a sealing body 2A formed into a circular ring to be inserted into an annular groove 11Ad provided on a boss 11A of a housing 11. The sealing body 2A can be configured, for example, as an O-ring having a thickness exceeding the depth of the annular groove 11Ad. That is, the sealing body 2A is inserted into the annular groove 11Ad to surround the hole 11Ab, and is configured to protrude from the mating surface 11Aa toward the mating surface 12Aa of the boss 12A. In addition, the seal 2 has a plurality of tongue pieces 2B extending toward the outer side of the ring and inserted into each branch groove 11Ae. The tongue pieces 2B are formed of a rubber material or the like like the seal 2A, and are formed integrally with the seal 2A. As shown in FIG. Figures 2 to 4 As shown, the tongue piece 2B is formed into a plurality of (two in the embodiment) tongue pieces extending in different directions. In the embodiment, the tongue piece 2B is formed so as to be inserted into each branch groove 11Ae and extend in directions 90 degrees away from the circular center of the sealing body 2A. The tongue piece 2B has a thickness exceeding the depth of the branch groove 11Ae. That is, the tongue piece 2B is inserted into the branch groove 11Ae and extends to the outside of the mating surface 11Aa. In addition, as shown in FIG. Figure 4 As shown in FIG. 1 , the tongue piece 2B is formed to have a width W2 that is smaller than the groove width W1 of the branch groove 11Ae. Figure 1 As shown, the seal 2 has a narrowed portion 2C between the seal body 2A and the tongue piece 2B. The narrowed portion 2C is a portion formed to be thinner than the seal body 2A and the tongue piece 2B. That is, the narrowed portion 2C can be deformed to a greater extent than the seal body 2A and the tongue piece 2B.

[0023] In the embodiment, the pressing member 3 is configured as a plate-shaped substrate as described above. The pressing member 3 has a through hole 3A for inserting a positioning portion 11C of a housing 11. A plate surface of the pressing member 3 abuts against an abutting surface 11B of a housing 11, thereby restricting the movement of the boss 11A in a direction opposite to the boss 12A. In addition, the pressing member 3 is restricted from moving in the direction along which its plate surface is located by inserting the positioning portion 11C into the through hole 3A. In addition, as Figure 2 and Figure 3As shown, the pressing member 3 is abutted against the abutment surface 11B by a screw 4 fastened to the inner side of one housing 11 from the other plate side, thereby being restricted from moving in the direction in which the bosses 11A and 12A are opposite to each other and fixed. In addition, the pressing member 3 is not limited to the substrate, and can also be a member housed in the waterproof housing 10, that is, a bracket member of the mechanism, a plate-shaped radiator, etc.

[0024] The assembly structure of the embodiment of such a structure is to configure the seal 2 on the boss 11A of a housing 11. Specifically, the sealing body 2A of the seal 2 is configured in the annular groove 11Ad of the boss 11A, and each tongue piece 2B is configured in each branch groove 11Ae. Since the thickness of the seal body 2A is greater than the depth of the annular groove 11Ad, it is configured to extend from the annular groove 11Ad and exceed the height of the docking surface 11Aa. Since the thickness of the tongue piece 2B is greater than the depth of the branch groove 11Ae, it is configured to extend from the branch groove 11Ae. The narrowing portion 2C of the seal 2 is configured in the middle of the connection between the annular groove 11Ad and the branch groove 11Ae, and is configured in each groove 11Ad and 11Ae. Thereafter, the assembly structure installs the pressing component 3 on a housing 11. Specifically, the pressing component 3 is positioned and configured in a manner that the positioning portion 11C of a housing 11 is inserted into the through hole 3A, and is fixed to the housing 11 by the screw 4. Here, the pressing component 3 is arranged in a positioned and fixed position with its edge covering the upper side of the branch groove 11Ae. Therefore, the pressing component 3 is arranged in a manner to contact the tongue piece 2B inserted into the branch groove 11Ae, and is pressed in a manner to arrange the tongue piece 2B inside the branch groove 11Ae. Therefore, the seal 2 positions and supports the sealing body 2A in the annular groove 11Ad via the tongue piece 2B. In addition, the tongue piece 2B of the seal 2 is deformed due to the pressing of the pressing component 3, but the deformation is absorbed by the narrowing portion 2C, so the tongue piece 2B is in a state of being pressed by the pressing component 3, and the deformation does not affect the sealing body 2A. Afterwards, the assembly structure is fastened and fixed to one housing 11 and the other housing 12 by the screw 1 in a manner that the mating surface 12Aa of the boss 12A is opposite to the mating surface 11Aa of the boss 11A. The threaded portion 1B of the screw 1 inserted into the hole 11Ab of the boss 11A from the outside of one housing 11 is inserted into the hole 12Ab of the boss 12A from the inside of the other housing 12 and screwed with the internal thread 12Ac. In the assembly structure, the head 1A of the tightened screw 1 abuts against the locking surface 11Ac of the boss 11A of one housing 11, so that the mating surface 11Aa of the boss 11A of one housing 11 contacts the mating surface 12Aa of the boss 12A of the other housing 12. Thus, the assembly structure sandwiches the sealing body 2A of the seal 2 between the bosses 11A and 12A to ensure the waterproof performance of the fixed part of the screw 1. When the assembly structure is sandwiched between the bosses 11A and 12A, the sealing body 2A is deformed, but by inserting the sealing body 2A in the annular groove 11Ad and the tongue piece 2B being pressed by the pressing component 3, the state in which the sealing body 2A is arranged between the bosses 11A and 12 is maintained. Therefore, the assembly structure can properly ensure the waterproof performance of the fixing part of the screw 1. In addition, the assembly structure has a narrowed portion 2C at the portion where the tongue piece 2B is provided, so that the entire annular shape of the sealing body 2A can be uniformly deformed regardless of the location where the tongue piece 2B is provided, and appropriate waterproof performance can be obtained.Furthermore, the waterproof housing 10 sandwiches the gasket 13 at the butt joint portion between the housings 11 and 12 by fastening with the screws 1, and the waterproof performance of the butt joint portion through the gasket 13 can also be ensured.

[0025] Thus, the assembly structure of the waterproof housing 10 in the embodiment is a structure in which an annular sealing body 2A is sandwiched between the portions where the bosses 11A and 12A of the separate housing 11 and the other housing 12 are in contact with each other, and the bosses 11A and 12A are fixed together with screws 1. In addition, the assembly structure includes: an annular groove 11Ad, which is provided on the mating surface 11Aa of the boss 11A of the housing 11, and the annular groove 11Ad is provided in a manner of surrounding the screw 1, and the sealing body 2A is arranged in the annular groove 11Ad; a plurality of branch grooves 11Ae, which are continuous with the annular groove 11Ad and extend to the outer side of the annular shape; a tongue piece 2B, which is extended to the outer side of the annular shape of the sealing body 2A and inserted into each branch groove 11Ae; and a pressing component 3, which is separate from the housing 11 and installed on the housing 11, and presses each tongue piece 2B into each branch groove 11Ae.

[0026] According to the assembly structure of the waterproof shell 10, the waterproof performance can be improved by sandwiching the sealing body 2A between the respective bosses 11A and 12A of one shell 11 and the other shell 12. Furthermore, according to the assembly structure of the waterproof shell 10, by pressing the tongue piece 2B with the pressing component 3, the sealing body 2A can be supported at an appropriate position to obtain waterproof performance between the respective bosses 11A and 12A of the one shell 11 and the other shell 12. As a result, according to the assembly structure of the waterproof shell 10, stable waterproof performance and sealed assembly guarantee can be obtained. Furthermore, according to the assembly structure of the waterproof shell 10, if a plurality of tongue pieces 2B are pressed with the pressing component 3, the sealing body 2A can be supported at multiple locations and can be fully supported, compared with the case where the pressing component 3 presses a single tongue piece 2B. Therefore, when assembling one housing 11 with another housing 12 after disposing the sealing body 2A, or when changing the orientation of one housing 11 after disposing the sealing body 2A, the sealing body 2A can be prevented from falling. As a result, according to the assembly structure of the waterproof housing 10, stable waterproof performance and sealed assembly guarantee can be obtained.

[0027] In addition, in the assembly structure of the waterproof case 10 of the embodiment, a plurality of branch grooves 11Ae are provided extending in different directions, and a plurality of tongue pieces 2B are provided, and these tongue pieces extend in different directions to be inserted into the branch grooves 11Ae.

[0028] According to the assembly structure of the waterproof housing 10, the plurality of tongues 2B extending in different directions are pressed by the pressing member 3, thereby supporting the sealing body 2A from different directions, thereby reliably preventing the sealing body 2A from being disengaged from the appropriate position. Specifically, in the assembly structure of the embodiment, the tongues 2B are formed to extend in directions different by 90 degrees from the circular center of the sealing body 2A. In the case of such a structure, Figure 2 and Figure 3 As shown, the pressing component 3 does not have to have a complicated shape that largely surrounds the boss 11A (boss 12A), and even when the boss 11A (boss 12A) is arranged near the corner of the housing 11 (12), miniaturization can be achieved, and the structure of supporting the sealing body 2A can be ensured without hindrance.

[0029] Furthermore, in the assembly structure of the waterproof case 10 of the embodiment, the width W2 of the tongue piece 2B is smaller than the groove width W1 of the branch groove 11Ae.

[0030] According to the assembly structure of the waterproof housing 10, a gap is generated between the tongue piece 2B and the groove wall of the branch groove 11Ae, and the tongue piece 2B can be easily arranged in the branch groove 11Ae. For example, when the width W2 of the tongue piece 2B is larger than the groove width W1 of the branch groove 11Ae, the tongue piece 2B is inserted into the branch groove 11Ae by pressing, and the pressing of the pressing member 3 is not stable, and sometimes the tongue piece 2B cannot be properly arranged in the branch groove 11Ae.

[0031] In addition, in the assembly structure of the waterproof housing 10 of the embodiment, a plurality of annular grooves 11Ad are formed in one housing 11, and a single pressing member 3 presses the tongue pieces 2B of the plurality of sealing bodies 2A arranged in the plurality of annular grooves 11Ad. That is, in the assembly structure of the waterproof housing 10 of the embodiment, a single pressing member 3 presses the plurality of tongue pieces 2B.

[0032] According to the assembly structure of the waterproof case 10 , the single pressing member 3 presses the tongue pieces 2B of the plurality of sealing bodies 2A arranged in the plurality of annular grooves 11Ad, so that the tongue pieces 2B of the plurality of sealing bodies 2A can be pressed intensively.

[0033] In addition, in the assembly structure of the waterproof case 10 of the embodiment, a positioning portion 11C is further provided for positioning the pressing member 3 at a position where the tongue piece 2B is pressed into the branch groove 11Ae.

[0034] According to the assembly structure of the waterproof case 10 , since the position of the pressing member 3 is supported by the positioning portion 11C, the tongue piece 2B can be appropriately pressed into the branch groove 11Ae, and the sealing body 2A can be arranged at an appropriate position.

[0035] In addition, in the assembly structure of the waterproof case 10 of the embodiment, the pressing member 3 is composed of a substrate attached to one case 11 .

[0036] According to the assembly structure of the waterproof case 10 , by using the substrate as the pressing member 3 , the member housed in the waterproof case 10 can be used as well, and the increase in the number of parts can be prevented, thereby suppressing the complexity of the structure and the increase in cost.

[0037] This embodiment includes the following inventions.

[0038] [Invention 1]

[0039] An assembly structure of a waterproof housing, wherein an annular sealing body is sandwiched between the parts where the bosses of one housing and another housing are connected, and the bosses are fixed together with screws, and the assembly structure comprises:

[0040] an annular groove provided on the mating surface of the boss of the one housing, the annular groove being provided in a manner of surrounding the screw, the sealing body being arranged in the annular groove;

[0041] A plurality of branch grooves, continuous with the annular groove and extending toward the outer side of the annular groove;

[0042] a tongue piece extending toward the annular outer side of the sealing body and inserted into each of the branch grooves; and

[0043] The pressing component is separate from the one shell and is installed on the one shell, and presses each of the tongue pieces into each of the branch grooves.

[0044] [Invention 2]

[0045] According to the assembly structure of the waterproof housing described in Invention 1,

[0046] The plurality of branch grooves are extended in different directions.

[0047] There are a plurality of tongues, and these tongues extend in different directions to be inserted into the branch grooves.

[0048] [Invention 3]

[0049] According to the assembly structure of the waterproof housing described in Invention 2,

[0050] The plurality of tongue pieces are pressed by the single pressing member.

[0051] [Invention 4]

[0052] According to the assembly structure of the waterproof housing according to any one of Inventions 1 to 3,

[0053] The width of the tongue piece is smaller than the width of the branch groove.

[0054] [Invention 5]

[0055] According to the assembly structure of the waterproof housing according to any one of Inventions 1 to 4,

[0056] A narrowing portion is provided at the root of the tongue.

[0057] [Invention 6]

[0058] According to the assembly structure of the waterproof housing according to any one of Inventions 1 to 5,

[0059] The one housing has a plurality of annular grooves formed therein, and the single pressing member presses the tongue pieces of the plurality of sealing bodies disposed in the plurality of annular grooves.

[0060] [Invention 7]

[0061] The assembly structure of the waterproof housing according to any one of Inventions 1 to 6 further includes a positioning portion that positions the pressing component at a position that presses the tongue piece into the branch groove.

[0062] [Invention 8]

[0063] According to the assembly structure of the waterproof housing described in Invention 7,

[0064] The pressing member is composed of a substrate mounted on the one housing.

[0065] INDUSTRIAL APPLICABILITY The present disclosure can achieve stable waterproof performance and sealed assembly assurance.

[0066] Description of Reference Numerals

[0067] 1 screw

[0068] 2A seal body

[0069] 2B tongue

[0070] 2C narrowing

[0071] 3 Pressing parts

[0072] 10 Waterproof housing

[0073] 11A shell

[0074] 11A boss

[0075] 11Aa docking surface

[0076] 11Ad annular groove

[0077] 11Ae branch slot

[0078] 11C Positioning Unit

[0079] 12 Another Shell

[0080] 12A boss

[0081] 12Aa docking surface.

Claims

1. An assembly structure of a waterproof housing, wherein an annular sealing body is sandwiched between the parts where the bosses of one housing and the other housing are connected, and the bosses are fixed together with screws, the assembly structure comprising: an annular groove provided on the mating surface of the boss of the one housing, the annular groove being provided in a manner of surrounding the screw, the sealing body being arranged in the annular groove; A plurality of branch grooves, continuous with the annular groove and extending toward the outer side of the annular groove; A tongue piece extending toward the annular outer side of the sealing body and inserted into each of the branch grooves; as well as The pressing component is separate from the one shell and is installed on the one shell, and presses each of the tongue pieces into each of the branch grooves.

2. The assembly structure of the waterproof housing according to claim 1, wherein: The plurality of branch grooves are extended in different directions. There are a plurality of tongues, and these tongues extend in different directions to be inserted into the branch grooves.

3. The assembly structure of the waterproof housing according to claim 2, wherein: The plurality of tongue pieces are pressed by the single pressing member.

4. The assembly structure of the waterproof housing according to claim 1, wherein: The width of the tongue piece is smaller than the width of the branch groove.

5. The assembly structure of the waterproof housing according to claim 1, wherein: A narrowing portion is provided at the root of the tongue.

6. The assembly structure of the waterproof housing according to claim 1, wherein: The one housing has a plurality of annular grooves formed therein, and the single pressing member presses the tongue pieces of the plurality of sealing bodies disposed in the plurality of annular grooves. 7 . The assembly structure of the waterproof housing according to claim 1 , further comprising a positioning portion, wherein the positioning portion positions the pressing component at a position where the tongue piece is pressed into the branch groove.

8. The assembly structure of the waterproof housing according to claim 7, wherein: The pressing member is composed of a substrate mounted on the one housing.

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