Sealing structure

Abstract

A sealing structure having further improved sealing performance is provided. A sealing structure (10) comprising at least a first layer (1) and a second layer (2) is provided. In the sealing structure, the first layer (1) has at least one first upper protrusion (11), the second layer (2) has at least one first upper protrusion (12), at least a portion of the first upper protrusion (11) of the first layer (1) is covered by the first upper protrusion (12) of the second layer (2), and the constituent material of the first layer (1) is harder than the constituent material of the second layer (2).

Description

Technical Field

[0001] The present disclosure relates to a sealing structure. More specifically, the present disclosure relates to a sealing structure that can be used in a connector, in particular, a housing of a connector. Background Art

[0002] Regarding the sealing structure, for example, a sealing structure that can be used in a connector for electrical connection or the like is known (see Patent Documents 1 and 2).

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application Publication No. 2004-119022;

[0006] Patent document 2: Japanese Patent Application Publication No. 2005-5035. Summary of the invention

[0007] Problems to be solved by the invention

[0008] For example, Patent Document 1 discloses a connector seal made of an elastic body for the purpose of preventing deformation during molding. Patent Document 2 discloses a rubber plug for a waterproof connector.

[0009] The inventors of the present application have noticed that there are problems to be overcome in conventional sealing structures, and have discovered the necessity of taking measures therefor. Specifically, the inventors of the present application have discovered the following problems.

[0010] For example, in the conventional sealing structures described in Patent Documents 1 and 2, a convex portion provided on the surface of the sealing structure forms a seal on a sealed structure such as a housing of a connector (see Patent Document 1). Figure 1 and Figure 2 And Patent Document 2 Figure 1 and Figure 2 ).

[0011] For example, Fig.13 As shown in the schematic cross-sectional view of FIG. 1 , the conventional sealing structure (X) is configured to have at least one convex portion (Y) (see FIG. 1 ). Fig.13 A). In addition, for the sake of convenience of explanation, the convex portion (Y) of the conventional sealing structure is simplified and shown in a triangular shape.

[0012] The convex portion (Y) of the conventional sealing structure is formed of an elastic body such as rubber. The convex portion (Y) enters or is inserted into the sealed structure (S) such as a connector housing in the direction of arrow D, and its top portion is deformed (see Fig.13 B). In this way, the top of the protrusion (Y) is deformed, thereby ensuring the sealing performance with respect to the sealed structure (S).

[0013] For example, Fig.13 As shown in B, the deformed convex portion (Y') presses the sealed structure (S) with a force of, for example, F0, but due to the abnormal deformation of the convex portion (Y), the force (F0) pressing the sealed structure (S) may decrease. That is, the sealing performance may decrease.

[0014] For example, Fig.13 As shown in C, the height of the top after deformation is reduced by only the height (h1) relative to the overall height (h0) of the convex portion (Y) before deformation. Due to the abnormal deformation of the convex portion (Y), the height of the top may be reduced by more than 50% (i.e., the value of h1 / h0 may become more than 1 / 2). Therefore, in the conventional sealing structure (X), due to such abnormal deformation, the force (F0) of the convex portion (Y') pressing the sealed structure (S) is reduced (refer to Fig.13 B). As a result, the sealing performance is reduced.

[0015] Furthermore, if Fig.13 As shown in C, due to the deformation of the convex portion (Y), the top of the convex portion (Y) is only displaced by the width (w1) after the deformation relative to the total width (w0) of the convex portion (Y) before the deformation. Due to the abnormal deformation of the convex portion (Y), the top is sometimes displaced by more than 50% in the width direction (that is, the value of w1 / w0 becomes more than 1 / 2). Therefore, in the previous sealing structure (X), it is necessary to set a gap between the convex portions, and it is difficult to reduce the total width of the sealing structure (X), that is, to miniaturize the width direction of the sealing structure. In addition, in this field, it is also required to reduce the dimension of the sealing structure in the thickness direction.

[0016] The present invention is made in view of this problem. That is, the main purpose of the present invention is to provide a sealing structure with further improved sealing performance. In addition, the present invention aims to further miniaturize the sealing structure with further improved sealing performance.

[0017] Solutions to Solve Problems

[0018] The inventors of the present application attempted to solve the above-mentioned problems by approaching them in a new direction rather than by extending the previous technology. As a result, they arrived at the invention of a sealing structure that achieves the above-mentioned main purpose.

[0019] Specifically, the inventors have studied how to further improve the sealing performance of the sealing structure by suppressing abnormal deformation of the convex portion of the sealing structure.

[0020] In order to suppress abnormal deformation of the convex portion of the sealing structure, for example, Figure 1As shown, the sealing structure (10) is composed of at least two layers, the first layer (1) has a first upper protrusion (11), and further studies are conducted to set the first upper protrusion (12) of the second layer (2) in a manner that covers at least a portion of the first upper protrusion (11). Furthermore, studies are conducted to: constitute the first layer (1) with a material harder than the second layer (2) so as to suppress abnormal deformation of the first upper protrusion (12) of the second layer (2), especially the top, and further increase the force (F) pressing the sealed structure (S1) (for example, the first sealed structure such as the housing of a connector) 10 ) (reference Figure 1 B).

[0021] The present disclosure provides a sealing structure including at least a first layer and a second layer. In the sealing structure, the first layer has at least one first upper protrusion, the second layer has at least one first upper protrusion, at least a portion of the first upper protrusion of the first layer is covered by the first upper protrusion of the second layer, and the constituent material of the first layer is harder than the constituent material of the second layer.

[0022] Effects of the Invention

[0023] In the present disclosure, a sealing structure with further improved sealing performance can be obtained. In addition, in the present disclosure, a sealing structure with further improved sealing performance can be further miniaturized. In addition, the effects recorded in this specification are only examples and not limitations, and additional effects may also exist. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram schematically showing a sealing structure according to one embodiment of the present disclosure.

[0025] Figure 2 This is a schematic diagram schematically showing a modification of the sealing structure according to one embodiment of the present disclosure.

[0026] Figure 3 This is a schematic diagram schematically showing a modification of the sealing structure according to one embodiment of the present disclosure.

[0027] Figure 4 This is a schematic diagram schematically showing a modification of the sealing structure according to one embodiment of the present disclosure.

[0028] Figure 5 This is a schematic diagram schematically showing a modification of the sealing structure according to one embodiment of the present disclosure.

[0029] Figure 6 This is a schematic diagram schematically showing a modification of the sealing structure according to one embodiment of the present disclosure.

[0030] Figure 7 This is a schematic diagram schematically showing a modification of the sealing structure according to one embodiment of the present disclosure.

[0031] Figure 8 It is a schematic diagram schematically showing a sealing structure according to another embodiment of the present disclosure.

[0032] Fig. 9 It is a schematic diagram schematically showing a modification of the overall shape of the sealing structure of the present disclosure.

[0033] Fig.10 It is a schematic diagram schematically showing an example of an annular seal structure.

[0034] Fig.11 This is a schematic diagram schematically showing an example of a tubular sealing structure.

[0035] Fig.12 This is a schematic diagram schematically showing an example of a porous sealing structure.

[0036] Fig.13 This is a schematic diagram schematically showing a conventional sealing structure. DETAILED DESCRIPTION

[0037] For example, Figure 1 As shown, the present disclosure provides a sealing structure (10) comprising at least a first layer (1) and a second layer (2). In the sealing structure, the first layer (1) has at least one first upper protrusion (11), and the second layer (2) has at least one first upper protrusion (12). At least a portion of the first upper protrusion (11) of the first layer (1) is covered by the first upper protrusion (12) of the second layer (2). In the sealing structure, the constituent material of the first layer (1) is harder than the constituent material of the second layer (2). In this specification, the above-mentioned sealing structure is sometimes referred to as the "sealing structure of the present disclosure".

[0038] Thus, the sealing structure of the present disclosure comprises at least a first layer (1) having at least one first upper protrusion (11), and a second layer (2) having at least one first upper protrusion (12) (see Figure 1 The sealing structure disclosed in the present invention may further include a third layer (3) (see Figure 8 ). There is no particular limitation on the number of protrusions and layers that can be included in the sealing structure of the present disclosure.

[0039] The sealing structure of the present disclosure may have a ring-shaped, tubular, porous, or other shape as its overall shape (see Fig. 9 ).

[0040] In the present disclosure, a "sealing structure" means a part or component that can form a seal or a seal together with any "sealed structure" described in detail below.

[0041] In the present disclosure, "sealed structure" means a part or component that requires "sealing". The "sealed structure" preferably has a structure such that, for example, the "sealing structure" of the present disclosure can be inserted into the interior of the "sealed structure". In particular, it is preferred to have a structure such that the "sealing structure" of the present disclosure contacts the inner wall of the "sealed structure" to form a "seal". Examples of the sealed structure include a connector housing, a connector body that can be engaged or fitted with the connector housing, a plug, a cord, an electric wire, or a fixing thereof. However, the sealed structure is not limited to these.

[0042] For example, when the sealed structure is a structure such as a connector shell, the "sealing structure" disclosed herein preferably contacts, engages and / or fits into the "sealed structure", and the "sealing structure" disclosed herein and the "sealed structure" are engaged or combined with each other.

[0043] In the present disclosure, “sealing” means preventing or suppressing the entry of moisture, gas such as water vapor, and / or dust between the “sealing structure” and the “sealed structure” of the present disclosure.

[0044] (Layer 1)

[0045] The first layer has a layered structure and has at least one "first upper convex portion".

[0046] The "first upper convex portion" that may be included in the first layer means a portion protruding from the surface of the first layer (hereinafter, sometimes omitted as "upper convex portion" or simply "convex portion"). There is no particular limitation on the number of convex portions that can be provided on the first layer. For example, 1 to 10, preferably 1 to 5, and more preferably 1 to 3 convex portions may be provided on the first layer. The convex portion may be, for example, a convex strip that protrudes from the surface of the first layer and extends continuously.

[0047] In the present disclosure, for convenience of explanation, the "upper" of the "upper convex portion" of the "first layer" means the side where the "second layer" described in detail below is arranged. In other words, the side where the "second layer" is arranged is referred to as "upper".

[0048] There is no particular limitation on the shape of the convex portion that can be provided on the first layer. The convex portion preferably has a rectangular shape (including a trapezoid) such as a triangle shape or a quadrilateral shape when observed in cross section. The edge portion of the convex portion may be rounded. Alternatively, the top of the convex portion may also be drawn as an arc.

[0049] The constituent material that can constitute the first layer (hereinafter sometimes referred to as "the constituent material of the first layer") is harder than the constituent material that can constitute the second layer (hereinafter sometimes referred to as "the constituent material of the second layer") described in detail below. In other words, the constituent material of the second layer has flexibility that is relatively easier to deform in response to an external force than the constituent material of the first layer. That is, the constituent material of the first layer has flexibility that is relatively more difficult to deform than the constituent material of the second layer.

[0050] In the present disclosure, "constituent material" of a layer means one or more materials that can constitute the layer.

[0051] The constituent material of the first layer preferably includes a resin. There is no particular limitation on the resin that can be used in the first layer. For example, rubbers such as polybutadiene and silicone are preferably used. In addition, the resin that can be used in the first layer can also be selected depending on the temperature.

[0052] In the present disclosure, the resin mainly included in the constituent material of the first layer is referred to as “first resin”.

[0053] The hardness of the constituent material of the first layer is higher than the hardness of the constituent material of the second layer, and the range thereof is not particularly limited.

[0054] Examples of the hardness of the constituent material of the first layer include Shore hardness, Rockwell hardness, Vickers hardness, Brinell hardness, durometer hardness, and Barcol hardness.

[0055] The hardness of the constituent material of the first layer is not particularly limited, and is, for example, in the range of 20 to 50, preferably 25 to 45, and more preferably 30 to 40, in any of the above hardnesses. The Shore hardness is preferably within the above range.

[0056] For example, when the constituent material of the first layer is a resin, the hardness of the constituent material of the first layer can be changed by a filler or a hardener used when producing the resin.

[0057] If necessary, the first layer may further include, for example, at least one "second upper convex portion" or "third upper convex portion" having a shape different from the "first upper convex portion" provided on the first layer. In the present disclosure, there is no particular limitation on the total number of upper convex portions that can be provided on the first layer.

[0058] (Layer 2)

[0059] The second layer has a layered structure and has at least one "first upper convex portion".

[0060] The "first upper convex portion" that may be included in the second layer means a portion protruding from the surface of the second layer (hereinafter, sometimes omitted as "upper convex portion" or simply "convex portion"). There is no particular limitation on the number of convex portions that can be provided in the second layer. For example, 1 to 10 convex portions, preferably 1 to 5 convex portions, and more preferably 1 to 3 convex portions may be provided. The convex portion may be, for example, a convex strip that protrudes from the surface of the second layer and extends continuously.

[0061] In the present disclosure, for convenience of explanation, the “above” of the “upper convex portion” of the “second layer” means the opposite direction of the “first layer”.

[0062] There is no particular restriction on the shape of the convex portion that can be provided in the second layer. The convex portion preferably has a rectangular shape (including a trapezoid) such as a triangular shape, a quadrilateral, etc. in cross-sectional observation. The edge portion of the convex portion may be rounded. Alternatively, the top of the convex portion may also be drawn as an arc. The top of the convex portion of the second layer is preferably relatively more rounded than the top of the convex portion of the first layer.

[0063] The convex portion that can be provided in the second layer can extend in a meandering manner when the cross section of the sealing structure is observed (see Figure 1 A).

[0064] The constituent material that can constitute the second layer (hereinafter sometimes referred to as "the constituent material of the second layer") is preferably softer than the constituent material of the first layer. The constituent material of the second layer further preferably includes a resin. There is no particular limitation on the resin that can be used in the second layer. For example, rubbers such as polybutadiene and silicone are preferably used. In addition, the resin that can be used in the second layer can also be selected depending on the temperature.

[0065] In the present disclosure, the resin mainly included in the constituent material of the second layer is referred to as “second resin”.

[0066] The hardness of the constituent material of the second layer is lower than the hardness of the constituent material of the first layer, and the range thereof is not particularly limited.

[0067] Examples of the hardness of the constituent material of the second layer include Shore hardness, Rockwell hardness, Vickers hardness, Brinell hardness, durometer hardness, and Barcol hardness.

[0068] The hardness of the constituent material of the second layer is not particularly limited, and is, for example, in the range of 20 to 50, preferably 25 to 45, and more preferably 30 to 40, in any of the above hardnesses. The Shore hardness is preferably within the above range.

[0069] For example, when the constituent material of the second layer includes a resin, the hardness of the constituent material of the second layer can be changed by a filler or a hardener used when producing the resin.

[0070] If necessary, the second layer may further include at least one "second upper convex portion" or "third upper convex portion" having a shape different from the "first upper convex portion" provided on the second layer. The total number of upper convex portions that can be provided on the second layer is not particularly limited.

[0071] [Features of the sealing structure disclosed herein]

[0072] The sealing structure disclosed in the present invention comprises at least a first layer and a second layer, wherein at least a portion of the first upper convex portion of the first layer is covered by the first upper convex portion of the second layer (for example, referring to Figure 1 The first upper protrusion (11) of the first layer (1) and the first upper protrusion (12) of the second layer (2) are shown. The constituent material of the first layer is harder than the constituent material of the second layer.

[0073] The sealing structure of the present invention can enter or be inserted into the interior of a sealed structure such as a connector housing. By virtue of the double convex portion structure, the sealing structure of the present invention can press the sealed structure from the inside with a further increased force (see Figure 1 B). Thus, the sealing structure of the present disclosure can provide a further improved sealing performance. In addition, by such a double convex portion structure, the sealing structure of the present disclosure can suppress abnormal deformation of the convex portion.

[0074] For example, Figure 1 As shown in A, a sealing structure 10 according to an embodiment of the present disclosure includes a first layer (a layer indicated by reference numeral 1 ) and a second layer (a layer indicated by reference numeral 2 ).

[0075] The first layer (1) includes at least one first upper protrusion 11 (hereinafter abbreviated as "protrusion 11" or simply "protrusion"). The second layer (2) also includes at least one first upper protrusion 12 (hereinafter abbreviated as "protrusion 12" or simply "protrusion"). In the illustrated manner, for ease of explanation, the first layer (1) has three protrusions of the same shape, and the second layer (2) also has three protrusions 12 of the same shape. In the present disclosure, the shapes and sizes of the protrusions may be the same or different. The protrusions may be arranged continuously or spaced apart.

[0076] In the illustrated form, the entire surface of the convex portion 11 of the first layer (1) is covered by the convex portion 12 of the second layer (2). In the sealing structure 10, it is sufficient as long as at least a portion of the surface of the convex portion 11 of the first layer (1) is covered by the convex portion 12 of the second layer (2). There is no particular limitation on the portion of the convex portion 11 of the first layer (1) covered by the convex portion 12 of the second layer (2). Preferably, the top of the convex portion 11 of the first layer (1) is covered by the convex portion 12 of the second layer (2). In addition, the portion of the convex portion 11 of the first layer (1) covered by the convex portion 12 of the second layer (2) can be determined for each convex portion of the first layer (1). In other words, the portion of the convex portion 11 of the first layer (1) covered by the convex portion 12 of the second layer (2) can be different for each convex portion.

[0077] In the illustrated embodiment, the first layer (1) and the second layer (2) have substantially the same outer shape, but the sealing structure disclosed herein is not limited to such a shape. In the first layer (1) and the second layer (2), convex portions of various shapes and sizes can be independently selected and used.

[0078] In the illustrated embodiment, both the convex portion 11 of the first layer (1) and the convex portion 12 of the second layer (2) have a cross-sectional shape with a triangular outer shape. In the sealing structure of the present disclosure, the shape of the convex portion is not limited to such a shape.

[0079] There is no particular limitation on the combination of the cross-sectional shape of the protrusions of the first layer (1) and the cross-sectional shape of the protrusions of the second layer (2). The geometric cross-sectional shapes of the protrusions of the first layer (1) and the protrusions of the second layer (2) can be appropriately selected and used independently.

[0080] In the illustrated embodiment, the top of the convex portion 11 of the first layer (1) and the top of the convex portion 12 of the second layer (2) are aligned on the straight line L, but the tops may not be aligned on the straight line L. In other words, the position of the top of the convex portion 11 of the first layer (1) and / or the position of the top of the convex portion 12 of the second layer (2) may deviate from the straight line L. That is, the top of the convex portion 11 and / or the top of the convex portion 12 may be on the straight line L or not.

[0081] In the sealing structure 10, the constituent material of the first layer (1) is harder than the constituent material of the second layer (2). In other words, the constituent material of the second layer (2) is softer than the constituent material of the first layer (1).

[0082] Specifically, the constituent material of the protrusions 11 that can constitute the first layer (1) is preferably harder than the constituent material of the protrusions 12 that can constitute the second layer (2). In other words, the constituent material of the protrusions 12 that can constitute the second layer (2) is preferably softer than the constituent material of the protrusions 11 that can constitute the first layer (1).

[0083] In the sealing structure disclosed in the present invention, it is preferred that the constituent materials constituting the first layer and the second layer both contain resins, and the resin mainly contained in the first layer (i.e., the "first resin") is harder than the resin mainly contained in the second layer (i.e., the "second resin"), or the second resin is softer than the first resin. In the present invention, there is no particular limitation on the resin used as long as a hardness difference can be set between the first resin and the second resin. In the first layer and the second layer, resins of the same type but different hardness can also be used. Alternatively, in the first layer and the second layer, resins of different types and different hardness can be used.

[0084] More specifically, the difference between the hardness of the material constituting the first layer, specifically the first resin, and the hardness of the material constituting the second layer, specifically the second resin, is preferably 5 to 25, and more preferably 10 to 20, in any of the above hardnesses. Thus, in the sealing structure disclosed in the present invention, the sealing performance can be further improved by providing a hardness difference between the first resin and the second resin.

[0085] The convex portion of the second layer preferably has “flexibility.” In the present disclosure, “flexibility” means a property of deforming when a force from the outside is applied. The convex portion of the second layer preferably deforms elastically.

[0086] For example, Figure 1 A and Figure 1 As shown in FIG. 1B , when the convex portion 12 of the second layer (2) contacts the sealed structure (S1), the convex portion 12 of the second layer (2) is preferably elastically deformed. More specifically, the top position of the convex portion of the second layer (2) is preferably elastically displaced (see FIG. Figure 1 B shows the deformed convex portion 12').

[0087] For example, Figure 1 As shown in FIG. 3 , the height of the convex portion 12 of the second layer (2), specifically the position of the top thereof, relative to the overall height (H0) of the convex portion 12 is preferably varied or reduced within a range of less than 50% along the height direction. It is further preferably varied within a range of less than 40% (see FIG. Figure 1 C). It is further preferred that the ratio be variable within a range of 20% to 30%.

[0088] More specifically, if Figure 1 As shown in C, with respect to the convex portion 12, the position of the top can be displaced by only H1 in the height direction relative to its overall height H0 (refer to the deformed convex portion 12'). In this case, the value of H1 / H0 is preferably less than 1 / 2. The value of H1 / H0 is more preferably less than 2 / 5, and more preferably more than 1 / 5 and less than 3 / 10.

[0089] In addition, the height H0 of the convex portion of the second layer (2) may be different for each convex portion. Similarly, the overall height of the convex portion of the first layer (1) may be different for each convex portion. Preferably, the overall height (H0) of the convex portion of the second layer (2) is greater than the overall height of the convex portion of the first layer (1).

[0090] Thus, by limiting the displacement of the height direction of the convex portion 12 of the second layer (2) to less than 50%, the force (F) of the deformed convex portion 12' pressing the sealed structure (S1) can be further increased. 10 ) (reference Figure 1 B). Furthermore, abnormal deformation of the convex portion 12 can be suppressed. In particular, the sealing performance can be further improved. Such an effect is caused by the presence of the convex portion 11 of the first layer (1) which is harder than the convex portion 12 of the second layer (2) below the convex portion 12.

[0091] In addition, the convex portion 11 of the first layer (1) which is harder than the convex portion 12 of the second layer (2) exists below the convex portion 12, thereby reducing the overall thickness of the sealing structure 10. Furthermore, the sealing structure 10 can be miniaturized in the thickness direction. Such miniaturization can also contribute to the miniaturization of the sealed structure, specifically, the housing of the connector, etc.

[0092] Furthermore, the convex portion 12 of the second layer (2), specifically the top portion thereof, preferably varies in a range of less than 50% relative to the total width (W0) of the convex portion 12 in the width direction. More preferably, it can vary in a range of less than 40%. Even more preferably, it can vary in a range of more than 20% and less than 30%.

[0093] More specifically, if Figure 1 As shown in C, the top position of the convex portion 12 of the second layer (2) can be displaced by only W1 in the width direction relative to its total width W0 (refer to the deformed convex portion 12'). In this case, the value of W1 / W0 is preferably less than 1 / 2. The value of W1 / W0 is more preferably less than 2 / 5, and even more preferably greater than 1 / 5 and less than 3 / 10.

[0094] Furthermore, the total width W0 of the convex portions of the second layer (2) may be different for each convex portion. Similarly, the total width of the convex portions of the first layer (1) may be different for each convex portion.

[0095] In this way, by limiting the displacement of the convex portion 12 of the second layer (2) in the width direction to less than 50%, the width direction dimension of the convex portion 12 and the interval between the convex portions 12 can be further reduced. Furthermore, the width direction dimension of the sealing structure 10 can be further reduced. Furthermore, the sealing structure 10 can be miniaturized in the width direction as a whole. Such miniaturization can also contribute to the miniaturization of the sealed structure, specifically the housing of the connector, etc.

[0096] In this disclosure, "width direction" means, for example Figure 1 The direction of the total width W0 in C or the horizontal direction of the paper. When the sealed structure is a housing of a connector, the "width direction" of the sealing structure may mean the fitting direction of the sealing structure of the present disclosure to the sealed structure.

[0097] In the illustrated embodiment, the lower surface of the first layer (1) (the surface of the first layer (1) opposite to the surface of the second layer (2)) is flat, but the shape of the lower surface of the first layer (1) can be appropriately changed to match the shape of the surface of another sealed structure (hereinafter sometimes referred to as "second sealed structure") that can directly contact the lower surface of the first layer (1) (see Figure 7 ). That is, the lower surface of the first layer (1) is not limited to a flat shape.

[0098] The shape of the top of the convex portion 11 of the first layer (1) and / or the shape of the top of the convex portion 12 of the second layer (2) may also be adapted to the sealed structure S1 (see Figure 1 B) The shape of the surface can be changed appropriately. That is, the shape of the top of the projection 11 of the first layer (1) and / or the shape of the top of the projection 12 of the second layer (2) are not limited to having a sharp edge portion.

[0099] The outer shape of the convex portion (11, 12) of the sealing structure 10 has a triangular shape in cross-sectional view, thereby further facilitating entry or insertion into the sealed structure S1 (along the arrow D 10 direction of entry or insertion) (cf. Figure 1 B).

[0100] Figure 1 The triangular cross-sectional shape of the convex portion shown may be bilaterally asymmetrical. In other words, it may be axially symmetrical about a vertical line passing through the top of the convex portion as the center, or it may not be axially symmetrical.

[0101] As a variation, for example, Figure 2 As shown, the edge portion of the top of the convex portion (21, 22) of the sealing structure 20 may be rounded. In other words, the convex portion (21, 22) may have a "substantially triangular" shape when viewed in cross section.

[0102] For example, Figure 2As shown, the convex parts (21, 22) of the sealing structure 20, especially the convex part 22 provided in the second layer (2), have rounded tops, so as to not only facilitate entry into the sealed structure but also further increase the force pressing the sealed structure. In the sealing structure 20, only the convex part 22 of the second layer (2) may be rounded. In other words, the convex part 21 of the first layer (1) may also have a sharp edge portion.

[0103] Figure 2 The substantially triangular cross-sectional shape of the convex portion shown may be bilaterally asymmetrical. In other words, it may be axially symmetrical about a vertical line passing through the top of the convex portion as the center, or it may not be axially symmetrical.

[0104] As another variation, for example, Figure 3 A shows a sealing structure 30 having a triangular apex that is flat or a trapezoidal convex portion (31, 32). Figure 3 The convex parts (31, 32) shown in A have flat tops, and thus can further increase the force pressing the sealed structure.

[0105] As another variation, for example, Figure 3 B shows a sealing structure 40 having convex parts (41, 42), wherein the convex parts (41, 42) have Figure 3 The shape of the trapezoid (hereinafter referred to as "substantially trapezoid") with rounded edges shown in A. The convex portions (41, 42) have a substantially trapezoidal shape, thereby facilitating entry into the sealed structure and further increasing the force pressing the sealed structure. In the sealing structure 40, only the convex portion 42 of the second layer (2) may be rounded. In other words, the convex portion 41 of the first layer (1) may also have a sharp edge portion.

[0106] Figure 3 A and Figure 3 The cross-sectional shape of the convex portion shown in B may be bilaterally asymmetrical. In other words, it may be axially symmetrical about a vertical line passing through the top of the convex portion as the center, or it may not be axially symmetrical.

[0107] As another variation, for example, Figure 4 A shows a sealing structure 50 having a more upright trapezoidal (hereinafter referred to as "substantially quadrilateral") convex portion (51, 52). The inclination angle of the convex portion (51, 52) is preferably 80° or more and 90° or less. The convex portion (51, 52) has a substantially quadrilateral shape, so that the force pressing the sealed structure can be further increased.

[0108] As another variation, in Figure 4 B shows a sealing structure 60 having convex parts (61, 62), wherein the convex parts (61, 62) have Figure 3The substantially quadrilateral shape with rounded edges shown in A. Such convex portions (61, 62) can facilitate the entry of the sealing structure 60 into the sealed structure, and can further increase the force pressing the sealed structure. In the sealing structure 60, only the convex portion 62 of the second layer (2) may be rounded. In other words, the convex portion 61 of the first layer (1) may also have a sharp edge portion.

[0109] As another modification, for example, in order to further promote the entry of the sealing structure into the sealed structure and further increase the force pressing the sealed structure, the shape of the convex portion of the sealing structure may be, for example, a right triangle.

[0110] For example, Figure 5 The sealing structure 70 shown in A has a first upper convex portion ( 71 , 72 ), wherein the first upper convex portion ( 71 , 72 ) has a right-angled triangular cross-sectional shape.

[0111] like Figure 5 As shown in FIG. 2B , the sealing structure 70 can be moved along the direction indicated by arrow D 70 The convex portion 72 of the second layer (2) disposed on the upper side of the convex portion 71 of the first layer (1) can be deformed by contacting the inner wall of the sealed structure S2 (see the deformed convex portion 72').

[0112] The convex portion 72 of the second layer (2) can be supported by the convex portion 71 of the first layer (1), so that the deformed convex portion 72' can be used to move the convex portion 72 with a greater force (F 70 ) Press the sealed structure S2 (refer to Figure 5 B).

[0113] For example, Figure 5 As shown in A, the shape of the convex portion (71, 72) of the sealing structure 70, in particular, the cross-sectional shape of the outer shape of the convex portion 72 is a right triangle. Figure 5 As shown in FIG. 2B, the sealing structure 70 can be promoted to move along the arrow D 70 direction into the sealed structure S2, and can enter with a greater force (F 70 ) presses the sealed structure S2.

[0114] For example, Figure 5 As shown in A, the convex parts (71, 72) of the sealing structure 70 are preferably arranged along the advancing direction ( Figure 5 Arrow D shown in B 70 Thus, not only can the entry of the sealing structure 70 into the sealed structure S2 be further promoted, but also the force pressing the sealed structure S2 can be further increased.

[0115] For example, Figure 5 As shown in A, the top of the convex portion 71 of the first layer (1) is on the straight line L1. The top of the convex portion 72 of the second layer (2) is on the straight line L2. Figure 5 In the embodiment shown in A, the top position of the convex portion 71 and the top position of the convex portion 72 may be staggered. In other words, the top of the convex portion 71 and the top of the convex portion 72 may be on the same line or not. By different top positions, the force of the sealing structure 70 entering the sealed structure S2 and pressing the sealed structure S2 can be further increased (see FIG. Figure 5 B).

[0116] For example, Figure 5 The tops of the convex parts (71, 72) of the sealing structure 70 shown in A may be rounded (not shown). This can further promote the entry of the sealing structure 70 into the sealed structure S2. In the sealing structure 70, only the convex part 72 of the second layer (2) may be rounded. In other words, the convex part 71 of the first layer (1) may also have a sharp edge portion.

[0117] As described above, the sealing structure of the present disclosure can have convex parts of various shapes. As required, such convex parts of various shapes can be used in combination. In the present disclosure, there is no particular limitation on the combination of the shapes of the convex parts.

[0118] The first layer (1) may further include the first upper convex portion and, for example, at least one second upper convex portion having a different shape. Furthermore, the second layer (2) may further include the first upper convex portion and, for example, at least one second upper convex portion having a different shape. In such a form, it is preferred that at least a portion of the second upper convex portion of the first layer (1) is covered by the second upper convex portion of the second layer (2). By having such a structure, the sealing property can be further improved.

[0119] Furthermore, the first layer (1) may further include the first upper convex portion and the second upper convex portion and, for example, at least one third upper convex portion having a different shape. The second layer (2) may further include the first upper convex portion and the second upper convex portion and, for example, at least one third upper convex portion having a different shape. In such a form, it is preferred that at least a portion of the third upper convex portion of the first layer (1) is covered by the third upper convex portion of the second layer (2). By having such a structure, the sealing property can be further improved.

[0120] The constituent material of the first upper protrusion of the first layer (1) and the constituent material of the second upper protrusion and / or the third upper protrusion of the first layer (1) may have different hardnesses. With such a structure, the second layer (2) can be supported more appropriately. Furthermore, a more appropriate seal can be provided.

[0121] The constituent material of the first upper protrusion of the second layer (2) and the constituent material of the second upper protrusion and / or the third upper protrusion of the second layer (2) may have different hardnesses. With such a structure, a more suitable seal can be provided.

[0122] For example, in Figure 6 In the sealing structure 80 shown in A, the first layer (1) has three upward protrusions (81a, 81b, 81c), and the second layer (2) arranged on the upper side of the first layer (1) also has three upward protrusions 82 (82a, 82b, 82c).

[0123] In the first layer (1), for convenience of explanation, the convex portion 81a is referred to as the "first upper convex portion", the convex portion 81b is referred to as the "second upper convex portion", and the convex portion 81c is referred to as the "third upper convex portion". Hereinafter, the descriptions of "convex portion 81a", "convex portion 81b", and "convex portion 81c" may be omitted.

[0124] In the second layer (2), for the sake of convenience, the convex portion 82a is referred to as the "first upper convex portion", the convex portion 82b is referred to as the "second upper convex portion", and the convex portion 82c is referred to as the "third upper convex portion". Hereinafter, the descriptions of "convex portion 82a", "convex portion 82b", and "convex portion 82c" may be omitted.

[0125] exist Figure 6 In the first layer (1) shown in A, the cross-sectional shape of the convex portion 81a and the convex portion 81b is a shape in which the top of the right triangle is flattened or a substantially trapezoidal shape. The cross-sectional shape of the convex portion 81c is a substantially quadrilateral shape.

[0126] exist Figure 6 In the second layer (2) shown in A, the cross-sectional shape of the outer shape of the convex portion 82a and the convex portion 82b is a shape in which the top of the right triangle is flattened or a substantially trapezoidal shape. The cross-sectional shape of the outer shape of the convex portion 82c is a substantially quadrilateral shape.

[0127] Figure 6 The sealing structure 80 illustrated in A can enter the interior of the sealed structure (not shown) from either side of the convex portion 82 a and the convex portion 82 b of the second layer ( 2 ).

[0128] Such a construction can be used, for example, in Fig. 9 A is used in the sealing structure 200 having an annular overall shape. Fig. 9 When the annular seal structure 200 shown in A is inserted into a sealed structure such as a housing of a connector (or a first sealed structure), it is not necessary to select the insertion direction of the seal structure.

[0129] For example, Figure 6Since the sealing structure 80 shown in A has such a convex portion, the penetration of the sealing structure 80 into the sealed structure and the force pressing the sealed structure can be further increased.

[0130] about Figure 6 The first layer (1) and the second layer (2) shown in A have substantially the same outer shape. The shapes of the first layer (1) and the second layer (2), in particular the shapes of the protrusions, may be different from each other. In the first layer (1) and the second layer (2), the protrusions may have various shapes that can be selected independently.

[0131] As a further variation, for example, in Figure 6 B shows a sealing structure 90 in which the edge of the convex portion is rounded. The sealing structure 90 has a convex portion with a rounded edge, so that the sealing structure 90 can be further facilitated to enter the sealed structure. In addition, the top of the convex portion, especially the top of the convex portion (92a, 92b, 92c) of the second layer (2), can also be drawn in an arc.

[0132] exist Figure 7 Other embodiments of the sealing structure of the present disclosure will be described.

[0133] For example, in Figure 7 In the sealing structure 110 shown in A, the first layer (1) has a first upper convex portion 111, specifically, three upper convex portions 111a, 111b, and 111c. Hereinafter, "convex portions 111a, 111b, and 111c" or simply "upper convex portion" or "convex portion" may be omitted.

[0134] The second layer (2) has a first upper convex portion 112, specifically, three upper convex portions 112a, 112b, and 112c. Hereinafter, "convex portions 112a, 112b, and 112c" or simply "upper convex portion" or "convex portion" may be omitted.

[0135] Figure 7 The convex portion (111, 112) shown in A and Figure 1 The convex parts (11, 12) shown are the same. In addition, as required, Figure 7 The convex parts (111, 112) shown in A can also be changed to Figures 2 to 6 The convex part illustrated in .

[0136] Figure 7The sealing structure 110 illustrated in A may have three first lower convex portions 114, more specifically three lower convex portions 114a, 114b and 114c, on the lower surface of the first layer (1) (or the surface on the opposite side to the direction in which the convex portion 111 protrudes or the surface on the opposite side to the surface facing the second layer (2)). Hereinafter, the description may be omitted as "convex portions 114a, 114b and 114c" or simply "lower convex portion" or "convex portion".

[0137] There is no particular limitation on the number of projections that can be provided on the lower surface of the first layer (1). For example, 1 to 10 projections, preferably 1 to 5 projections, and more preferably 1 to 3 projections can be provided. The projections can be, for example, convex strips that protrude from the lower surface of the first layer and extend continuously.

[0138] The protrusions (114a, 114b, 114c) that can be arranged on the lower surface of the first layer (1) of the sealing structure 110 are preferably formed in the following manner: adapted to the surface shape of another sealed structure (for example, a second sealed structure such as a connector body or housing, a plug, a soft wire, an electric wire or its fixing) that can be contacted by the lower surface of the first layer (1).

[0139] The shape of the convex portion that can be provided on the lower surface of the first layer (1) is not particularly limited. The convex portion that can be provided on the lower surface of the first layer (1) preferably has a rectangular shape such as a triangle or a quadrilateral (including a trapezoid) when observed in cross section. The convex portion may be bilaterally symmetrical or bilaterally asymmetrical when observed in cross section. The top of the convex portion may be rounded.

[0140] Figure 7 Each of the three protrusions ( 114 a , 114 b , 114 c ) provided on the lower surface of the first layer ( 1 ) illustrated in A has a triangular cross-sectional shape that bulges downward.

[0141] In the illustrated form, the vertical line La passing through the top of the upper convex portion 111a coincides with the vertical line Ma passing through the top of the lower convex portion 114a. Similarly, the vertical line Lb passing through the top of the upper convex portion 111b coincides with the vertical line Mb passing through the top of the lower convex portion 114b. The vertical line Lc passing through the top of the upper convex portion 111c coincides with the vertical line Mc passing through the top of the lower convex portion 114c.

[0142] The vertical lines La, Lb and Lc may not be consistent with the vertical lines Ma, Mb and Mc, respectively. In other words, the top position of the upper convex portion 111 and the top position of the lower convex portion 114 of the first layer (1) may be on the same line as shown in the figure, or they may not be on the same line.

[0143] As another variation, in Figure 7B illustrates a sealing structure 120 having a convex portion 124, specifically two lower convex portions (124a, 124b), on the lower surface of the first layer (1). For ease of description, the lower convex portion 124a is referred to as the "first lower convex portion", and the lower convex portion 124b is referred to as the "second lower convex portion". Hereinafter, the descriptions of "convex portion 124a" and "convex portion 124a" may be omitted.

[0144] The first upper convex portion 121, specifically, the three upper convex portions (121a, 121b, 121c) protruding on the upper side of the first layer (1) of the sealing structure 120 can be connected with the Figure 7 The convex portions ( 111 a , 111 b , 111 c ) illustrated in A are formed in the same manner.

[0145] The first upper convex portion 122 of the second layer (2) of the sealing structure 120, specifically the three upper convex portions (122a, 122b, 122c), can be connected to the Figure 7 The convex portions ( 112 a , 112 b , 112 c ) illustrated in A are formed in the same manner.

[0146] exist Figure 7 Both of the two protrusions ( 124 a , 124 b ) provided on the lower surface of the first layer ( 1 ) illustrated in B have a triangular cross-sectional shape that bulges downward.

[0147] Regarding the shape of the convex portion (124a, 124b), its cross section is not limited to a triangular shape, and for example, it may have a rectangular shape such as a quadrilateral (including a trapezoid) in cross-sectional observation. The shape of the convex portion (124a, 124b) may also be, for example, Figure 7 A is a shape that is bilaterally symmetrical in cross-sectional view. In addition, the tops of the protrusions (124a, 124b) may be rounded.

[0148] In the illustrated embodiment, the vertical line Ma passing through the top of the lower convex portion 124a does not coincide with the vertical line La passing through the top of the upper convex portion 121a. Similarly, the vertical line Mb passing through the top of the lower convex portion 124b does not coincide with the vertical line Lb passing through the top of the upper convex portion 121b.

[0149] By forming such convex portions, the lower convex portions (124a, 124b) and the upper convex portions (121a, 121b, 121c) of the first layer (1) can be arranged alternately. With such a structure, the overall thickness of the first layer (1) can be further reduced. In addition, the sealing structure 120 can be further miniaturized in the thickness direction.

[0150] In the sealing structure of the present disclosure, the lower convex portion of the first layer (1) may also have, for example, Figures 2 to 6 The same shape as the upper convex portion shown.

[0151] The sealing structure of the present disclosure may further include any "third layer" as required. Specifically, the sealing structure of the present disclosure may further include the third layer on the lower surface of the first layer (the surface opposite to the surface on which the second layer is provided). In other words, in the sealing structure of the present disclosure, the first layer may be positioned between the third layer and the second layer. The third layer is described in detail below.

[0152] (Layer 3)

[0153] The third layer has a layered structure and may have at least one "first downward protrusion".

[0154] The "first lower convex portion" that may be included in the third layer means a portion that protrudes downward from the surface of the third layer (hereinafter, sometimes omitted as "lower convex portion" or simply "convex portion"). There is no particular limitation on the number of convex portions that can be provided in the third layer. For example, 1 to 10 convex portions, preferably 1 to 5 convex portions, and more preferably 1 to 3 convex portions may be provided in the third layer. The convex portion may be, for example, a convex strip that protrudes from the surface of the third layer and extends continuously.

[0155] In the present disclosure, “below” of the “first lower convex portion” of the “third layer” means the opposite direction of the “second layer”.

[0156] There is no particular limitation on the shape of the lower convex portion that can be provided on the third layer. The outer shape of the lower convex portion preferably has a rectangular shape (including a trapezoid) such as a triangle shape or a quadrilateral shape in cross-sectional observation. The edge portion of the lower convex portion may also be rounded. Alternatively, the lower convex portion may also be drawn in an arc. The top of the lower convex portion of the third layer is preferably relatively more rounded than the top of the lower convex portion that can be provided on the lower surface of the first layer.

[0157] The lower convex portion that can be provided in the third layer can extend in a meandering manner, for example, when observing the cross section of the sealing structure (see Figure 8 ).

[0158] The constituent material that can constitute the third layer (hereinafter sometimes referred to as "the constituent material of the third layer") is preferably softer than the constituent material of the first layer. In other words, the constituent material of the first layer is preferably harder than the constituent material of the third layer. In addition, the constituent material of the third layer has flexibility that is relatively easier to deform in response to external force than the constituent material of the first layer. That is, the constituent material of the first layer has flexibility that is relatively more difficult to deform than the constituent material of the third layer.

[0159] The constituent material of the third layer preferably includes a resin. The resin that can be used in the third layer is not particularly limited, and for example, rubbers such as polybutadiene and silicone are preferably used. In addition, the resin that can be used in the third layer can also be selected depending on the temperature.

[0160] In the present disclosure, the resin mainly included in the constituent material of the third layer is referred to as “third resin”.

[0161] The hardness of the constituent material of the third layer is lower than the hardness of the constituent material of the first layer, and the range thereof is not particularly limited.

[0162] Examples of the hardness of the constituent material of the third layer include Shore hardness, Rockwell hardness, Vickers hardness, Brinell hardness, durometer hardness, and Barcol hardness.

[0163] The hardness of the constituent material of the third layer is not particularly limited, and any of the above hardnesses is, for example, in the range of 20 to 50, preferably 25 to 45, and more preferably 30 to 40. The Shore hardness and the durometer hardness are preferably within the above ranges.

[0164] When the constituent material of the third layer includes a resin, the hardness of the constituent material of the third layer can be changed by a filler, a hardener, or the like used when producing the resin.

[0165] If necessary, the third layer may further include, for example, at least one "second downward convex portion" or "third downward convex portion" having a shape different from that of the "first downward convex portion" of the third layer.

[0166] For example, Figure 8 As shown, in the sealing structure disclosed in the present invention, it is preferred that at least one first lower protrusion is provided on the side of the first layer opposite to the third layer. Furthermore, it is preferred that the third layer also has at least one first lower protrusion. It is preferred that at least a portion of the first lower protrusion of the first layer is covered by the first lower protrusion of the third layer. The constituent material of the first layer is preferably harder than the constituent material of the third layer. In other words, the constituent material of the third layer is preferably softer than the constituent material of the first layer.

[0167] With such a structure, a more appropriate seal can be formed between the third layer and the sealed structure (or the second sealed structure) in contact with the third layer.

[0168] The entire surface of the first lower convex portion of the first layer may be covered by the first lower convex portion of the third layer. Alternatively, only a portion of the surface of the first lower convex portion of the first layer may be covered by the first lower convex portion of the third layer. Preferably, the top of the first lower convex portion of the first layer is covered by the first lower convex portion of the third layer.

[0169] In the sealing structure disclosed herein, the constituent material of the first layer preferably includes a resin (e.g., the first resin), and the constituent material of the third layer also includes a resin (e.g., the third resin). The third resin is preferably softer than the first resin. In other words, the first resin is preferably harder than the third resin.

[0170] With such a structure, the third layer and the sealed structure (or the second sealed structure) can be brought into contact with each other more appropriately, and the sealing performance can be further improved.

[0171] In the present disclosure, there is no particular limitation on the resin used as long as a hardness difference can be set between the third resin and the first resin. The third resin and the first resin may be of the same type but different in hardness. Alternatively, different types of resins and different in hardness may be used in the third layer and the first layer.

[0172] More specifically, the difference between the hardness of the material that can constitute the third layer, specifically the third resin, and the hardness of the material that can constitute the first layer, specifically the first resin, is preferably 5 to 25 in any of the above hardnesses, and more preferably 10 to 20. Thus, in the sealing structure disclosed in the present invention, the sealing performance can be further improved by providing a hardness difference between the third layer and the first layer.

[0173] For example, in Figure 8 A shows a sealing structure 130 having a third layer (3). The sealing structure 130 can be formed by Figure 7 The sealing structure 110 illustrated in A is formed by placing the third layer ( 3 ) on the lower surface of the first layer ( 1 ) (the surface opposite to the second layer ( 2 ) side).

[0174] about Figure 8 The sealing structure 130 shown in A is provided with a lower convex portion 134 (specifically, the first lower convex portions 134a, 134b, 134c) of the first layer (1), and a lower convex portion 133 (specifically, the first lower convex portions 133a, 133b, 133c) of the third layer (3) is arranged on its surface. In the illustrated embodiment, the top position of the lower convex portion 134 of the first layer (1) and the top position of the lower convex portion 133 of the third layer (3) are respectively consistent with the vertical lines Ma, Mb and Mc, but these may not be consistent.

[0175] As another variation, for example, Figure 8 B shows a sealing structure 140 having a third layer (3). The sealing structure 140 can be formed by Figure 7 The sealing structure 120 illustrated in B is formed by placing the third layer ( 3 ) on the lower surface of the first layer ( 1 ) (the surface opposite to the second layer ( 2 ) side).

[0176] Figure 8The sealing structure 140 shown in B has a lower convex portion 143 of the third layer (3) (specifically, a first lower convex portion 143a and a second lower convex portion 143b) on the surface of the lower convex portion 144 (specifically, a first lower convex portion 144a and a second lower convex portion 144b) provided on the first layer (1). In the illustrated embodiment, the top position of the lower convex portion 144 of the first layer (1) and the top position of the lower convex portion 143 of the third layer (3) coincide with each other on the vertical lines Ma and Mb, respectively, but these may not coincide with each other.

[0177] In addition, in the sealing structure of the present disclosure, the lower convex portion of the third layer (3) may also have, for example, Figures 2 to 6 The upper convex portion of the second layer (2) shown has the same shape.

[0178] (Overall shape)

[0179] For example, Fig. 9 The overall shape of the sealing structure of the present disclosure is shown, and examples thereof include (A) a ring-shaped sealing structure 200 , (B) a tube-shaped sealing structure 300 , and (C) a porous sealing structure 400 .

[0180] Specifically, Fig. 9 A shows (a) the front, (b) the side, and (c) the back of the annular seal structure 200. Fig. 9 In the side surface of A(b), the convex portion of the sealing structure 200 can be confirmed.

[0181] Fig. 9 B is a perspective view showing the entire shape of the tube-type sealing structure 300 .

[0182] Fig. 9 C shows (a) the front side, (b) the side surface, and (c) the back side of the porous sealing structure 400. Fig. 9 In the side surface of C(b), the convex portion of the sealing structure 400 can be confirmed.

[0183] Hereinafter, the annular seal structure 200 , the tubular seal structure 300 , and the porous seal structure 400 will be briefly described.

[0184] Fig.10 The annular sealing structure 200 is shown ((A) front, (B) side, (C) back, (D) bottom or top). The annular sealing structure 200 has an annular overall structure. The sealing structure 200 has three convex strips (201, 202, 203) provided as convex parts on its outer periphery and three convex strips (204, 205, 206) provided as convex parts on its inner periphery (see Fig.10 E).

[0185] The sealing structure 200 is, for example, arranged between the housing of the connector (or the first sealed structure) and the connector body (or the second sealed structure) that can be fitted into the housing of the connector, and can form a seal. The sealing structure 200 is preferably first installed on the connector body, etc., and then inserted into the connector housing.

[0186] Fig.10 E is simplified and schematically shown Fig.10 A is a cross section of the sealing structure 200 at xx. Protrusions 201, 202, and 203 schematically show protrusions that can be set in the "second layer" of the present disclosure. Protrusions 204, 205, and 206 schematically show protrusions that can be set in the "first layer" or "third layer" of the present disclosure. Fig.10 In the cross section of E, for simplicity of illustration, the boundaries between the first layer, the second layer, and / or the third layer are not shown.

[0187] Fig.11 300 is a perspective view schematically showing a tubular sealing structure 300. The tubular sealing structure 300 has a cylindrical overall structure and has two convex strips (301, 302) as convex portions on its outer periphery.

[0188] The projections 301 and 302 correspond to the projections that can be provided in the "second layer" of the present disclosure. In the illustrated form, the projection 303 corresponds to the projection of the "first layer" of the present disclosure. In the illustrated form, the projection 301 is formed on the upper side of the projection 303.

[0189] The tubular sealing structure 300 is preferably configured so that a sealed structure (or a second sealed structure) such as a cord, an electric wire, or a fixing member thereof can be arranged and fixed in a through hole provided therein. The internal shape of the through hole (i.e., the shape of the surface of the "first layer" or "third layer" of the present disclosure on the opposite side to the "second layer" (see Figure 7 , Figure 8 )) is preferably complementary to the shape of the surface of the sealed structure (or the second sealed structure) that can be arranged in the through hole.

[0190] The tubular sealing structure 300 has a sealed structure (or a second sealed structure) such as a cord, an electric wire or a fixing member thereof arranged in its through hole, and is then inserted into a sealed structure (or a first sealed structure) such as a housing of a connector, thereby forming a seal.

[0191] Fig.12The porous sealing structure 400 is shown ((A) front, (B) side, (C) back, (D) partial cross section). The porous sealing structure 400 is, for example, plate-shaped, has a plurality of through holes, has three convex strips (401, 402, 403) provided as convex portions on the outer periphery, and two convex strips (404, 405) provided as convex portions inside the through holes (see Fig.12 D).

[0192] The porous sealing structure 400 is capable of forming a seal by respectively configuring a sealed structure (or a second sealed structure) such as a soft wire, an electric wire or its fixing parts in a plurality of through holes, and then inserting it into a sealed structure (or a first sealed structure) such as a connector housing.

[0193] Fig.12 D is simplified and schematically shown Fig.12 B is a cross section of the circled portion of the sealing structure 400. Protrusions 401, 402, and 403 schematically show protrusions that can be provided in the "second layer" of the present disclosure. Protrusions 404 and 405 schematically show protrusions that can be provided in the "first layer" or "third layer" of the present disclosure (but they are protrusions on the opposite side of the "second layer" of the present disclosure). Fig.12 In the partial cross section of D, the boundaries between the first layer, the second layer, and / or the third layer are not shown for simplicity of illustration.

[0194] The sealing structure disclosed in the present invention is not limited to the above-mentioned embodiment. In the present invention, the above-mentioned embodiments can be appropriately combined as needed. In particular, the shapes of the convex portions can be appropriately combined and used.

[0195] [Method for manufacturing the sealing structure disclosed herein]

[0196] The sealing structure disclosed in the present invention can be manufactured mainly by "two-color molding". For example, the first layer and the second layer can be formed by "two-color molding", and the third layer can be formed as needed. In addition, the convex parts can also be formed independently by "two-color molding".

[0197] The sealing structure of the present disclosure is preferably a laminated body. The sealing structure of the present disclosure is further preferably a laminated body manufactured integrally by two-color molding.

[0198] [Industrial Applicability]

[0199] The sealing structure of the present disclosure can be used in various fields requiring waterproofness, dustproofness, and / or airtightness, etc. The sealing structure of the present disclosure can be used in a connector that can be used for electrical connection, in particular, in a housing of a connector.

[0200] [Description of symbols]

[0201] 1 Layer 1;

[0202] 2 Layer 2;

[0203] 3 3rd layer;

[0204] 10, 20, 30, 40, 50, 60, 70, 80, 90 sealing structure;

[0205] 110, 120, 130, 140 sealing structures;

[0206] 11, 21, 31, 41, 51, 61, 71, the first upper convex part of the first layer;

[0207] 12, 22, 32, 42, 52, 62, 72, the first upper convex part of the second layer;

[0208] 81a, 91a, 111, 121, 131, 141 the first upper convex portion of the first layer;

[0209] 81b, 91b the second upper convex part of the first layer;

[0210] 81c, 91c the third upper convex part of the first layer;

[0211] 82a, 92a, 112, 122, 132, 142 the first upper convex portion of the second layer;

[0212] 82b, 92b the second upper convex portion of the second layer;

[0213] 82c, 92c the third upper convex part of the second layer;

[0214] 114, 134, 124a, 144a the first lower convex portion of the first layer;

[0215] 124b, 144b the second lower convex portion of the first layer;

[0216] 133, 143a the first lower convex part of the third layer;

[0217] 143b The second lower convex part of the third layer;

[0218] 200 annular seal structure;

[0219] 201, 202, 203, 204, 205, 206 convex part / ridge (ring type);

[0220] 300 Tubular sealing structure;

[0221] 301, 302, 303 convex part / ridge (tube type);

[0222] 400 porous sealing structure;

[0223] 401, 402, 403, 404, 405 convex parts / ridges (porous type);

[0224] X The former sealed structure;

[0225] Y from the front convex part;

[0226] S, S1, S2 are sealed structures.

Claims

1. A sealing structure comprising at least a first layer and a second layer, wherein: The first layer has at least one first upper protrusion, the second layer has at least one first upper protrusion, at least a portion of the first upper protrusion of the first layer is covered by the first upper protrusion of the second layer, the constituent material of the first layer is harder than the constituent material of the second layer, the first layer and the second layer are resins of the same type but different hardness, and the height of the first upper protrusion of the second layer varies within a range of less than 50% relative to the overall height of the protrusion.

2. The sealing structure according to claim 1, wherein: The first upper protrusion of the second layer has flexibility.

3. The sealing structure according to claim 1 or 2, wherein: The first layer further has at least one second upper convex portion, and the second layer further has at least one second upper convex portion, and at least a portion of the second upper convex portion of the first layer is covered by the second upper convex portion of the second layer.

4. The sealing structure according to claim 3, wherein: The first layer further has at least one third upper convex portion, and the second layer further has at least one third upper convex portion, and at least a portion of the third upper convex portion of the first layer is covered by the third upper convex portion of the second layer.

5. The sealing structure according to claim 4, wherein: The constituent material of the first upper protrusion of the first layer and the constituent material of the second upper protrusion and / or the third upper protrusion of the first layer have different hardnesses from each other, or A constituent material of the first upper protrusions of the second layer and a constituent material of the second upper protrusions and / or the third upper protrusions of the second layer have different hardnesses from each other.

6. The sealing structure according to claim 1 or 2, wherein: The invention further includes a third layer, wherein the first layer is positioned between the third layer and the second layer.

7. The sealing structure according to claim 6, wherein: The first layer has at least one first lower protrusion on the side opposite to the third layer, and the third layer also has at least one first lower protrusion, at least a portion of the first lower protrusion of the first layer is covered by the first lower protrusion of the third layer, and the constituent material of the first layer is harder than the constituent material of the third layer.

8. The sealing structure according to claim 7, wherein: The constituent material of the first layer includes a first resin, the constituent material of the third layer includes a third resin, and the first resin is harder than the third resin.

9. The sealing structure according to claim 1 or 2, wherein: The sealing structure is a laminated body.

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