JP6514596B2 - Seal member and seal structure - Google Patents

Description

  The present invention relates to a seal member such as a housing or a case and a seal structure, and more particularly, a seal member and a seal structure that can be easily opened and closed with light force and reliably waterproof and easy to handle even by elderly people and the like. About.

  Conventionally, in order to prevent rainwater and dust from invading the case housing the electronic device and the like, a seal structure is provided at the joint portion between the opening of the case and the lid. As such a general seal structure, a structure using an O-ring or a flexible seal member is known.

  For example, Patent Document 1 discloses an electronic device sealing structure using an O-ring. In the electronic device sealing structure of Patent Document 1, as shown in FIG. 7, an O-ring 202 made of a rubber-like elastic material disposed in an annular groove provided on the outer peripheral surface 211 of the lid member 201 of the electronic device; The housing 203 is provided with an annular inner circumferential surface 231 which receives the lid member 201 and comes into sealing contact with the O-ring 202.

  Patent Document 2 discloses a waterproof seal structure using a flexible seal member. The waterproof seal structure 304 of Patent Document 2 is, as shown in FIG. 8, a flexible seal member 306 that bends over the entire circumference by pressing the lid 303 against the case main body 302 in the case 301. And a projecting wall 305 which applies a sufficiently large pressure to the contact point 302 a of the flexible seal member 306 and the case main body 302 to enhance the sealing property.

JP, 2009-43773, A JP, 2014-107340, A

  However, in the structure using an O-ring as in Patent Document 1, it is difficult to obtain sufficient waterproofness only by adhesion due to deformation of the O-ring. Moreover, in order to reduce the sliding resistance at the time of opening and closing of a cover member, it was necessary to coat a surface treating agent on O ring.

  On the other hand, even in the structure using a flexible seal member as in Patent Document 2, sufficient waterproofness can not be obtained by the resilience of the flexible seal member alone, and the flexible seal member must be strongly pressed. The In addition, there is a problem that the waterproof property can not be maintained when the restoring force of the flexible sealing member is deteriorated due to deterioration with time or the like.

  The present invention has been made in view of the above problems, and an object thereof is to provide a seal member and a seal structure which can be easily opened and closed with a light force and surely waterproof.

  The present invention is a seal member interposed in a fitting portion between a case having an opening and an open / close lid for opening and closing the opening, the seal member being embedded in the wall of the open / close lid or the wall of the case And a first elastic portion and a second elastic portion protruding from the wall, and the first elastic portion and the second elastic portion stand upright with a gap from the opposing surface of the open / close lid or the opposing surface of the housing It is characterized by being.

  In the seal member of the present invention, the second elastic portion is characterized in that the elastic modulus is lower than that of the first elastic portion.

  The present invention is a seal structure provided with the above-mentioned seal member, and when the open / close lid and the housing are fitted, the first elastic portion of the seal member is pressed against the open / close lid or the housing The second elastic portion is sandwiched between the facing surface of the open / close lid and the facing surface of the housing.

  Further, in the seal structure of the present invention, the restriction portion of the first elastic portion is provided in the gap between the seal member and the facing surface.

  In the seal structure of the present invention, the open / close lid and the housing are connected to be opened and closed by the hinge, and the seal member is formed such that the thickness near the hinge is thicker than the position away from the hinge It is characterized by

  According to the present invention, it is possible to provide a seal member and a seal structure which can be easily opened and closed with light force and surely waterproof.

FIG. 2 is a cross-sectional view showing a seal member and a seal structure of Embodiment 1; FIG. 2 is a cross-sectional view of the seal member and the seal structure of the first embodiment; It is a side view and a front view showing other composition of a seal member. FIG. 7 is a cross-sectional view of a main part of a seal member and a seal structure of Embodiment 2. FIG. 10 is a cross-sectional view showing a seal structure of Embodiment 3; FIG. 14 is a cross-sectional view showing a seal structure of Embodiment 4; It is a sealing structure for electronic devices using a conventional O-ring. It is a waterproof seal structure using a conventional flexible seal member.

(Embodiment 1)
The seal member 30 and the seal structure 100 according to the first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view showing the seal member 30 and the seal structure 100 according to the first embodiment.

  The seal structure 100 includes a housing 10 having an opening 11 and an open / close lid 20 that opens and closes the opening 11 by being fitted with the housing 10. 1A shows a state before fitting of the open / close lid 20 and the case 10, and FIG. 1B shows a state after fitting of the openable lid 20 and the case 10. As shown in FIG.

  The seal structure 100 of the present invention can be applied as a seal structure of the entire housing such as an operation panel or an electric circuit box used in the outdoor or water environment. In particular, it is suitable as a seal structure for an electric vehicle or the like in which a battery is accommodated inside the housing 10 and the opening 11 is frequently opened and closed for battery replacement and charging.

  As shown in FIG. 1 (b), the sealing structure 100 of the present invention is internally fitted when the case 10 having the opening 11 and the opening and closing lid 20 are fitted and the opening 11 is closed by the opening and closing lid 20. In order to prevent rainwater and dust from invading, the sealing member 30 is interposed in the fitting portion between the open / close lid 20 and the housing 10. Note that the open / close lid 20 and the case 10 are held in the fitted state by a fixing member (not shown) such as a claw that is engaged and fixed by closing the open / close lid 20 to the case 10 ing.

  In the seal structure 100 according to the first embodiment, as shown in FIG. 1A, the open / close lid 20 is formed with a step 21 fitted to the opening 11 of the housing 10. In the step portion 21 of the open / close lid 20, in order to fix the seal member 30, a groove portion 25 surrounding the outer peripheral wall surface 22 is formed.

  Further, the open / close lid 20 and the housing 10 are provided with an opposite surface 23 and an opposite surface 13 which face each other in the fitting direction of the open / close lid 20 and the housing 10.

  The seal member 30 is formed in an annular shape using, for example, a rubber material such as EPDM or CR, or an elastic member such as a sponge material. Further, the seal member 30 has a base 31 embedded in the wall surface 22 of the open / close lid 20, and a first elastic portion 32 and a second elastic portion 33 projecting from the wall surface 22, and the first elastic portion 32 and the second elastic portion 32. The elastic portion 33 is erected from the facing surface 23 of the open / close lid 20 with a gap S therebetween.

  The seal member 30 has a tapered shape that tapers from the first elastic portion 32 on the base 31 side to the second elastic portion 33 on the tip side. For this reason, the second elastic portion 33 on the tip end side of the first elastic portion 32 on the base 31 side is configured to have a lower apparent elastic modulus.

  FIG. 2 is a cross-sectional view of an essential part of the seal structure 100 in the fitted state of the open / close lid 20 and the case 10 shown in FIG. In the seal member 30, the first elastic portion 32 close to the wall surface 22 of the open / close lid 20 is pressed by the corner portion 14 of the case 10 and bent when the open / close lid 20 and the case 10 are fitted. The second elastic portion 33 is sandwiched between the facing surface 23 of the open / close lid 20 and the facing surface 13 of the housing 10 and is crushed.

  Therefore, in the seal structure 100 of the present invention, the first elastic portion 32 of the seal member 30 is in close contact with the corner portion 14 of the housing 10, and the second elastic portion 33 of the seal member 30 opens and closes with the opposing surface 13 of the housing 10. It is in close contact with the opposing surface 23 of the lid 20, and has a structure in which the first elastic portion 32 and the second elastic portion 33 closely seal at the contact point.

  For this reason, even when sufficient space for the seal structure can not be taken up, excellent waterproofness can be exhibited with space saving. Further, even if the restoring force of the first elastic portion 32 of the seal member 30 is weakened by deterioration with time, the second elastic portion 33 of the seal member 30 is sandwiched between the facing surfaces of the housing 10 and the opening / closing lid 20. The minimum waterproofness can be secured.

  Furthermore, according to the sealing structure 100 of the present invention, when the opening and closing lid 20 is fitted to the opening 11 by the fitting structure of the sealing member 30, the first elastic portion 32 of the sealing member 30 is bent, The 30 second elastic parts 33 are sandwiched, and the first elastic parts 32 and the 2 elastic parts 33 are in close contact with each other in a stepwise manner.

  Therefore, since the open / close lid 20 can be closed with a light force without performing special surface treatment on the seal member 30, when the seal structure 100 of the present invention is applied to an electric vehicle, even the elderly etc. It can be easily opened and closed, and can reliably exhibit waterproofness.

  In the seal member 30 according to the first embodiment, the second elastic member 32 has a second tapered shape that is tapered from the first elastic portion 32 on the base 31 side toward the second elastic portion 33 on the distal end side. The elastic portion 33 is formed to have a low modulus of elasticity, but may have another shape different from the tapered shape.

  FIG. 3 is a side view (a) and a front view (b) showing another shape of the seal member 30A. As shown in FIG. 3, the apparent elastic modulus of the second elastic portion 33 can be reduced by providing the region of the plurality of groove-shaped thin portions 35 in the second elastic portion 33. The thin portion 35 is preferably formed on the facing surface 23 side of the open / close lid 20 from the viewpoint of securing waterproofness. In addition, the thin portion 35 may be an inverted triangle that widens from the first elastic portion 32 to the second elastic portion 33, or may be formed parallel to the wall surface 22.

  Further, by providing the protrusion 26 corresponding to the thin portion on the facing surface 23 of the open / close lid 20 and pressing the thin portion reliably to the housing side, the adhesion between the thin portion and the housing is not impaired, and further Waterproofness can be improved.

  Further, as shown in FIGS. 3C and 3D, by forming the thin portion 35 so as not to be continuous to the end of the second elastic portion 33, the projection 26 is provided on the facing surface 23 of the open / close lid 20. It is possible to ensure waterproofness.

Second Embodiment
FIG. 4 is a cross-sectional view (a) of the seal member 30B used for the seal structure 100 according to the second embodiment, and a cross-sectional view of the main part showing a state in which the open / close lid 20 and the housing 10 are fitted using the seal member 30B b). In addition, about the structure similar to Embodiment 1, the referential mark same as Embodiment 1 is attached | subjected, and the description is abbreviate | omitted.

  In the seal member 30B of the second embodiment, as shown in FIG. 4A, the restriction S for increasing the apparent elastic modulus of the first elastic portion 32 is in the gap S between the seal member 30B and the facing surface 23 of the open / close lid 20. The part 34 is provided. The restriction portion 34 has a role as a support for supporting the seal member 30B erected from the wall surface 22 by forming a protrusion on the opposite side to the pressing surface of the first elastic portion 32, and the first elastic portion 32 When pressed by the corner portion 14 of the housing 10, the function of increasing the restoring force of the first elastic portion 32 is provided.

  For this reason, according to the seal structure 100 of the second embodiment, the amount of bending of the seal member 30B in the direction of the gap S is restricted, and the pressing force of the first elastic portion 32 becomes strong. Can. Further, by changing the position of the restricting portion 34 of the seal member 30B, the curved state of the seal member 30B when fitted can be adjusted, and the adhesion of the seal member 30B can be enhanced.

  In addition to forming a protrusion on the sealing member 30B to form the regulating portion 34, a member having a different elastic modulus is sandwiched in the gap S between the sealing member 30 and the facing surface 23 of the opening / closing lid 20. The same effect can be obtained by projecting a part of the opposing surface 23 toward the first elastic portion 32 of the seal member 30.

(Embodiment 3)
FIG. 5 is a cross-sectional view showing the seal structure 100 according to the third embodiment. 5A shows a state before fitting of the open / close lid 20 and the case 10, and FIG. 5B shows a state after fitting of the open / close lid 20 and the case 10. As shown in FIG. In addition, about the structure similar to Embodiment 1, the referential mark same as Embodiment 1 is attached | subjected, and the description is abbreviate | omitted.

  The seal structure 100 of the third embodiment has a structure in which a seal member 30C is provided on the inner wall surface 12 of the opening 11 of the housing 10. The seal member 30C of the third embodiment is annularly formed using the same material as the seal member 30 of the first embodiment, but unlike the seal member 30 of the first embodiment, the seal member 30C is directed from the outer peripheral side to the inner peripheral side. A base 31, a first elastic portion 32, and a second elastic portion 33 are provided.

  The housing 10 is provided with a groove 15 for fixing the sealing member 30C to the inner wall surface 12 and a protruding wall 16 protruding from the wall 12, and the protruding wall 16 has an opposite surface 13 facing the open / close lid 20. It is provided. Further, the open / close lid 20 is provided with the facing surface 23 facing the facing surface 13 of the housing 10 and the corner 24 for pressing the first elastic portion 32 of the seal member 30C.

  In the seal structure 100 according to the third embodiment, when the opening and closing lid 20 is fitted into the opening 11, the first elastic portion 32 of the sealing member 30C is bent after being pressed by the corner 24 of the opening and closing lid 20; The second elastic portion 33 at the tip of the portion 32 is sandwiched between the facing surface 23 of the open / close lid 20 positioned in the fitting direction and the facing surface 13 of the housing 10 and is pressure-welded. Further, the first elastic portion 32 of the seal member 30C is in close contact with the corner 24 of the open / close lid 20, and the second elastic portion 33 of the seal member 30C is in close contact with the opposite surface 23 of the open / close lid 20 and the opposite surface 13 of the housing 10. The double-sealed structure is formed at the contact portion between the first elastic portion 32 and the second elastic portion 33.

  For this reason, in the seal structure 100 according to the third embodiment, space saving can be further achieved, and waterproofness and ease of opening and closing can be improved. Furthermore, the whole of the open / close lid 20 can be housed in the opening 11 of the housing 10 to create a sense of unity, which can contribute to an improvement in design.

  Also in the seal structure 100 of the third embodiment, by providing the restricting portion 34 in the seal member 30C as in the second embodiment, the resilience and adhesion of the first elastic portion 32 of the seal member 30C are increased to make it waterproof. Can be further improved.

(Embodiment 4)
FIG. 6 is a cross-sectional view showing a seal structure 100 according to a fourth embodiment. 6A shows a state before fitting of the open / close lid 20 and the case 10, and FIG. 6B shows a state after fitting of the open / close lid 20 and the case 10. As shown in FIG. In addition, about the structure similar to Embodiment 1, the referential mark same as Embodiment 1 is attached | subjected, and the description is abbreviate | omitted.

  In the seal structure 100 of the fourth embodiment, as shown in FIG. 6, the open / close lid 20 and the housing 10 are connected by the hinge 40, and the open / close lid 20 is opened and closed with respect to the opening 11. There is. Thus, in the structure in which the open / close lid 20 and the housing 10 are connected by the hinge 40, the seal member 30a at a position close to the hinge 40 is likely to be deformed due to the pressure applied by the principle of forceps. The pressure applied to the seal member 30b at a position far from the point is weak and the seal member 30b is not easily deformed.

  Further, since the amount of shift before closing the open / close lid 20 is small at the position close to the hinge 40, the seal member 30a at the position close to the hinge 40 tends to reduce the amount of deformation. For this reason, when the position of the hinge 40 is shifted, it may be difficult to ensure even waterproofness even if the open / close lid 20 is completely closed.

  As shown in FIG. 6A, the seal structure 100 of the fourth embodiment is characterized in that the seal member 30a at a position close to the hinge 40 is formed thicker than the seal member 30b at a position far from the hinge 40.

  In the seal structure 100 of the fourth embodiment, by forming the seal member 30a at a position close to the hinge 40 thick in advance, it is possible to secure a sufficient amount of deformation of the seal member 30a. Further, even if the seal member 30a at a position close to the hinge 40 is formed thick, it can be easily deformed by the principle of forceps when the open / close lid 20 is closed. On the other hand, the sealing member 30b at a position far from the hinge 40 can secure sufficient waterproofness by closing the open / close lid 20 deeper than the original angle.

  Therefore, according to the seal structure 100 of the fourth embodiment, even in the structure in which the open / close lid 20 and the housing 10 are connected by the hinge 40, the waterproofness of the seal structure 100 is uniformly secured regardless of the position of the hinge 40. Can.

  In the seal structure 100 of the fourth embodiment, the seal member 30a and the seal member 30b are provided on the side of the open / close lid 20 as in the first embodiment. The inner wall surface 12 may be provided with the seal member 30a and the seal member 30b. Even if the seal member 30a and the seal member 30b are provided on the housing 10 side, the seal structure is changed regardless of the position of the hinge 40 by changing the thickness of the seal member 30a near the hinge 40 and the seal member 30b far from the hinge 40. Waterproofness of 100 can be ensured uniformly.

  In addition, even in the seal structure in which the opening 11 of the housing 10 is fitted to the inside of the opening and closing lid 20 except the embodiment described above, the inner wall surface of the opening and closing lid 20 or the wall surface outside the housing 10 is By erecting the seal member, it is possible to apply the seal member and the seal structure of the present invention.

  The seal structure of the present invention can be applied to various cases, casings and the like as a seal structure for preventing intrusion of rain water and dust into the casing and the like. In addition, since it can be easily opened and closed with a light force and surely waterproofed, it is suitable as a seal structure of a housing such as an electric vehicle used by an elderly person and the like.

DESCRIPTION OF SYMBOLS 10 Housing | casing 11 Opening part 12, 22 Wall surface 13, 23 Opposing surface 14, 24 Corner part 15, 25 Groove part 16 Projection wall 20 Opening / closing lid 21 Step part 30, 30A, 30B, 30C, 30a, 30b Seal member 31 Base part 32 1 elastic portion 33 second elastic portion 34 restricting portion 35 thin-walled portion 40 hinge 100 seal structure

Claims (3)

A sealing member interposed in a fitting portion between a housing having an opening and an open / close lid for opening and closing the opening,
The seal member has a base embedded in the wall surface of the open / close lid or the wall surface of the housing, and a first elastic portion and a second elastic portion protruding from the wall surface, and the first elastic portion and the first elastic portion (2) A sealing member characterized in that the elastic portion is erected with a gap from the facing surface of the opening / closing lid or the facing surface of the housing ,
The second elastic unit, wherein the to luciferyl seal member being formed such that the elastic modulus is lower than the first elastic part. A sealing member interposed in a fitting portion between a housing having an opening and an open / close lid for opening and closing the opening,
The seal member has a base embedded in the wall surface of the open / close lid or the wall surface of the housing, and a first elastic portion and a second elastic portion protruding from the wall surface, and the first elastic portion and the first elastic portion (2) A seal structure comprising a seal member characterized in that a resilient portion is erected with a gap from the facing surface of the opening / closing lid or the facing surface of the housing,
When the open / close lid and the housing are fitted, the first elastic portion of the seal member is pressed by the open / close lid or the housing, and the second elastic portion of the seal member is the open / close lid Nipped between the facing surface and the facing surface of the housing,
Features and to luciferyl Lumpur structure that regulating portion of the first elastic portion in the gap between the sealing member and the opposing surface is provided. A sealing member interposed in a fitting portion between a housing having an opening and an open / close lid for opening and closing the opening,
The seal member has a base embedded in the wall surface of the open / close lid or the wall surface of the housing, and a first elastic portion and a second elastic portion protruding from the wall surface, and the first elastic portion and the first elastic portion (2) A seal structure comprising a seal member characterized in that a resilient portion is erected with a gap from the facing surface of the opening / closing lid or the facing surface of the housing,
When the open / close lid and the housing are fitted, the first elastic portion of the seal member is pressed by the open / close lid or the housing, and the second elastic portion of the seal member is the open / close lid Nipped between the facing surface and the facing surface of the housing,
The open / close lid and the housing are connected to be opened and closed by a hinge, and the seal member is formed to be thicker at a position closer to the hinge than at a position farther from the hinge. you Cie Lumpur structure.

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