Gasket and Sealing Structure

Abstract

The present invention provides a gasket and a sealing structure capable of achieving stable postures even in a portion with a narrow configuration space. The present invention is characterized in that a gasket main body portion (120) includes: an annular lip portion (121) that is pressed against an opposing surface (320) opposite to a first member (200) in a second member (300) and closely adheres to the opposing surface (320) in a state of being bent inward; a first annular protrusion (122) that closely adheres to an end surface (221) opposite to the second member (300) in an assembled portion (220); and a second annular protrusion (123) that is provided at a position closer to the inside than the first annular protrusion (122) and closely adheres to the end surface (221).

Description

Technical Field

[0001] The present invention relates to a gasket and a sealing structure for closing a gap between two mutually fixed members. Background Art

[0002] With the miniaturization of devices and the like, when closing the gap between two mutually fixed members, in the arrangement space of the gasket for closing the gap, there is a case where the distance in the width direction (the direction perpendicular to the direction in which the two members are compressed) is short. In this case, the cross-sectional shape of the gasket is longitudinally long, and if it is compressed by the two members, it will fall down or the like, and the attitude is unstable, thus having an adverse effect on the sealing performance. Therefore, the following countermeasure is taken, that is, by previously forming a structure having portions that are likely to fall outward or inward, the attitude when compressed by the two members is stabilized. However, due to the further development of device miniaturization and the like, there is a case where it is difficult to maintain the attitude of the gasket.

[0003] Prior Art Documents

[0004] Patent Documents

[0005] Patent Document 1: International Publication No. 2018 / 193766 Summary of the Invention

[0006] Technical Problem to be Solved by the Invention

[0007] An object of the present invention is to provide a gasket and a sealing structure capable of achieving stable attitude even in a narrow arrangement space.

[0008] Solution for Solving the Technical Problem

[0009] In order to solve the above problems, the present invention adopts the following means.

[0010] That is, the gasket of the present invention closes the gap between the first member and the second member. The first member has an opening portion and an annular and notch-shaped assembled portion provided along the opening edge of the opening portion. The second member is fixed to the first member. The gasket is characterized by including:

[0011] A reinforcing ring having: a body portion extending from the side of the first member toward the side of the second member; and a bent portion bent inward from the end portion on the side of the first member in the body portion; and

[0012] A gasket main body portion made of an elastic body, integrally provided on the reinforcing ring,

[0013] And, the gasket main body portion includes:

[0014] The annular lip portion is pressed against the opposite surface of the second member that faces the first member, and adheres to the opposite surface in a state of being bent inward;

[0015] The first annular protrusion adheres to the end face of the assembled portion that faces the second member; and

[0016] The second annular protrusion is provided at a position closer to the inside than the first annular protrusion and adheres to the end face.

[0017] In addition, the sealing structure of the present invention includes:

[0018] The first member has an opening portion and an annular and notch-shaped assembled portion provided along the opening edge of the opening portion;

[0019] The second member fixed to the first member; and

[0020] A gasket that closes the gap between the first member and the second member,

[0021] The sealing structure is characterized in that the gasket includes:

[0022] A reinforcing ring having: a body portion extending from the first member side toward the second member side; and a bent portion bent inward from the end portion on the first member side of the body portion; and

[0023] An elastomeric gasket main body integrally provided on the reinforcing ring,

[0024] And, the gasket main body includes:

[0025] An annular lip portion is pressed against the opposite surface of the second member that faces the first member, and adheres to the opposite surface in a state of being bent inward;

[0026] The first annular protrusion adheres to the end face of the assembled portion that faces the second member; and

[0027] The second annular protrusion is provided at a position closer to the inside than the first annular protrusion and adheres to the end face.

[0028] According to these inventions, in the gasket, the ring rigidity is maintained by reinforcement. Additionally, when the gasket is compressed by the first member and the second member, the lip portion closely adheres to the opposing surface on the second member side, and a state is formed in which the first annular protrusion and the second annular protrusion closely adhere to the end surface in the assembled portion on the first member side. At this time, since the lip portion is in a state of being bent inward, the movement of the lip portion can be stabilized. Further, since it is configured such that both the first annular protrusion and the second annular protrusion closely adhere to the end surface in the assembled portion, it is possible to suppress the movement of these first annular protrusion and second annular protrusion to the outside or the inside. These conditions interact with each other, thereby enabling the attitude of the gasket to be stabilized.

[0029] In addition, the gasket main body portion may include an outer peripheral side annular protrusion, and the outer peripheral side annular protrusion closely adheres to the inner peripheral surface in the assembled portion.

[0030] Thereby, after the gasket is assembled to the first member, it is possible to prevent the gasket from coming off the first member, and it is also possible to suppress the positional deviation of the gasket with respect to the first member.

[0031] The compression amount of the second annular protrusion compressed by the end surface may be smaller than the compression amount of the first annular protrusion compressed by the end surface.

[0032] In this way, by making the compression amounts of the first annular protrusion and the second annular protrusion different, it is possible to make the movement of the gasket more stable when the gasket is compressed by the first member and the second member.

[0033] It should be noted that the above-described respective configurations can be combined and adopted as much as possible.

[0034] Advantages of the Invention

[0035] As described above, according to the present invention, it is possible to achieve the stabilization of the attitude of the gasket even in a portion with a narrow installation space. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 is a schematic view of a sealing structure according to an embodiment of the present invention.

[0037] Figure 2 is a schematic top view of a gasket according to an embodiment of the present invention.

[0038] Figure 3 is a schematic cross-sectional view of a gasket according to Embodiment 1 of the present invention.

[0039] Figure 4 is a schematic cross-sectional view of a sealing structure according to Embodiment 1 of the present invention.

[0040] Figure 5 is a schematic cross-sectional view of a gasket according to Embodiment 2 of the present invention. Detailed Implementation Manner

[0041] With reference to the accompanying drawings, the manner for implementing the present invention will be described in detail by way of examples. Among them, without specific special description, the dimensions, materials, shapes, relative configurations, etc. of the components described in this embodiment are not intended to limit the scope of the present invention only to these.

[0042] (Example 1)

[0043] With reference to Figures 1 to 4 , the gasket and the sealing structure of Example 1 of the present invention will be described. Figure 1 is a schematic diagram of the sealing structure of the embodiment of the present invention. In Figure 1 , the components constituting the sealing structure are shown schematically, and a part of the sealing structure is shown in cross-section. Figure 2 is a schematic top view of the gasket of the embodiment of the present invention, showing the top view of the gasket schematically. Figure 3 is a schematic cross-sectional view of the gasket of Example 1 of the present invention, corresponding to Figure 2 the AA cross-sectional view in Figure 4 is a schematic cross-sectional view of the sealing structure of Example 1 of the present invention. It should be noted that Figure 4 the gasket in Figure 2 corresponds to the AA cross-sectional view in

[0044] <Summary of the Sealing Structure>

[0045] In particular, with reference to Figure 1 , the summary of the sealing structure of this embodiment will be described. The sealing structure of this embodiment includes: a first member 200; a second member 300 fixed to the first member 200; and a gasket 100 that closes the gap between these first member 200 and second member 300. The first member 200 has: an opening 210; and an annular and notch-shaped assembled portion 220 provided along the opening edge of the opening 210. In addition, in this embodiment, the second member 300 includes an insertion portion 310 inserted into the opening 210 of the first member 200. And the gasket 100 is configured to close the gap between the first member 200 and the second member 300 by being assembled to the assembled portion 220 provided on the first member 200. It should be noted that, as specific examples of the first member 200 and the second member 300, an example can be given where the second member 300 is a connector and the first member 200 is a housing for assembling the connector.

[0046] <Gasket>

[0047] In particular, with reference to Figure 2 and Figure 3The gasket 100 of this embodiment will be described. Regarding the planar shape of the gasket 100 of this embodiment, its inner peripheral surface and outer peripheral surface are substantially rectangular (refer to Figure 2 ). Among them, the planar shape of the gasket 100 is a shape corresponding to the opening 210 of the first member 200 and the outer shape of the second member 300. Therefore, the planar shape of the gasket of the present invention is not limited to the example shown in the figure, and various shapes can be adopted (for example, in the case of an annular gasket, the planar shape is circular).

[0048] Moreover, the gasket 100 of this embodiment is composed of a reinforcing ring 110 and a gasket main body portion 120 made of an elastomer (for example, rubber). The reinforcing ring 110 is made of metal or the like, and the gasket main body portion 120 is integrally provided on the reinforcing ring 110. For example, by using the reinforcing ring 110 as an insert member and molding the gasket main body portion 120 by insert molding, the gasket 100 can be obtained.

[0049] The reinforcing ring 110 has a body portion 111 extending from the side of the first member 200 toward the side of the second member 300, and a bent portion 112 that bends inward from the end portion on the side of the first member 200 in the body portion 111. More specifically, the body portion 111 is composed of a cylindrical portion, and the annular bent portion 112 is composed of a portion of the front end of the body portion 111 that bends inward.

[0050] The gasket main body portion 120 includes: an annular lip portion 121 provided on the end portion side of the body portion 111 of the reinforcing ring 110 opposite to the bent portion 112; and a first annular protrusion 122 and a second annular protrusion 123 provided on the side of the bent portion 112. The lip portion 121 is configured to incline inward as it goes from the end of the body portion 111 toward the lip tip. Both the first annular protrusion 122 and the second annular protrusion 123 are configured to extend straight from the root of the protrusion toward the tip of the protrusion. In addition, the second annular protrusion 123 is disposed inside the first annular protrusion 122. Further, the protruding height of the second annular protrusion 123 is configured to be smaller than the protruding height of the first annular protrusion 122.

[0051] In addition, in the gasket main body portion 120 of this embodiment, an outer peripheral side annular protrusion 125 is included on its outer peripheral surface side.

[0052] <Details of the sealing structure>

[0053] In particular, refer to Figure 4A more detailed description of the sealing structure of this embodiment will be given. In a state where the first member 200 and the second member 300 are fixed, the lip portion 121 in the gasket main body portion 120 closely adheres to the opposing surface 320 in the second member 300 that faces the first member 200. In addition, the assembled portion 220 in the first member 200 includes: an end surface 221 facing the second member 300; and an inner circumferential surface 222 that faces the outer circumferential surface 311 of the insertion portion 310 in the second member 300. Moreover, the first annular protrusion 122 and the second annular protrusion 123 in the gasket main body portion 120 are configured to closely adhere to the end surface 221 in the assembled portion 220. In addition, the outer circumferential side annular protrusion 125 in the gasket main body portion 120 is configured to closely adhere to the inner circumferential surface 222 in the assembled portion 220.

[0054] <Advantages of the gasket and sealing structure of this embodiment>

[0055] According to the gasket 100 of this embodiment, since the reinforcing ring 110 is provided, the rigidity of the gasket 100 is maintained. And the lip portion 121 in the gasket main body portion 120 is configured to incline inward as it goes from the end of the body portion 111 in the reinforcing ring 110 toward the front end of the lip. Therefore, when the gasket 100 is compressed by the first member 200 and the second member 300, the lip portion 121 is pressed against the opposing surface 320 in the second member 300 that faces the first member 200, and thus closely adheres to the opposing surface 320 in a state of being bent inward. In this way, the movement of the lip portion 121 can be stabilized.

[0056] In addition, both the first annular protrusion 122 and the second annular protrusion 123 are configured to extend straight from the root of the protrusion toward the front end of the protrusion. Therefore, when the gasket 100 is compressed, these first annular protrusion 122 and second annular protrusion 123 are compressed without inclining inward or outward. And since both the first annular protrusion 122 and the second annular protrusion 123 are configured to closely adhere to the end surface 221 in the assembled portion 220, it is possible to suppress the movement of these first annular protrusion 122 and second annular protrusion 123 outward or inward.

[0057] Under the interaction of these conditions, the attitude of the gasket 100 can be stabilized. Therefore, even when the installation space of the gasket 100 is narrow, especially when the distance in the width direction (the direction perpendicular to the direction in which the gasket is compressed by the first member 200 and the second member 300) is short, stable sealing performance can be obtained. For example, even in an environment where the pressure (internal pressure) inside the gasket 100 is higher than the pressure outside the gasket 100, the attitude of the gasket 100 can be maintained, and stable sealing performance can be obtained. In addition, even when the materials of the first member 200 and the second member 300 are easily deformed and the dimensional tolerance of the portion where the gasket 100 is assembled is large, the attitude of the gasket 100 can be stabilized, and thus stable sealing performance can be obtained.

[0058] Furthermore, in the gasket 100 of the present embodiment, the outer peripheral side annular protrusion 125 is configured to closely adhere to the inner peripheral surface 222 of the mounted portion 220. Thereby, after the gasket 100 is assembled to the first member 200, it is possible to prevent the gasket 100 from falling off the first member 200, and it is also possible to prevent the position deviation of the gasket 100 relative to the first member 200.

[0059] In addition, in the present embodiment, the protruding height of the second annular protrusion 123 is configured to be less than the protruding height of the first annular protrusion 122. Thus, the amount of compression of the second annular protrusion 123 compressed by the end surface 221 is smaller than the amount of compression of the first annular protrusion 122 compressed by the end surface 221. In this way, by making the compression amounts of the first annular protrusion 122 and the second annular protrusion 123 different, the operation of the gasket 100 when the gasket 100 is compressed by the first member 200 and the second member 300 can be made more stable.

[0060] (Embodiment 2)

[0061] In Figure 5 shows Embodiment 2 of the present invention. In the present embodiment, a case where the shape of the reinforcing ring and a part of the configuration of the gasket main body are different from those shown in Embodiment 1 above is shown. Since the basic structure and functions are the same as those in Embodiment 1, the same reference numerals are given to the same components and their description is omitted.

[0062] Figure 5 is a schematic cross-sectional view of the gasket according to Embodiment 2 of the present invention, corresponding to Figure 2AA cross-sectional view. The gasket 100X of this embodiment is also composed of a reinforcing ring 110X and a gasket main body portion 120X made of an elastomer (e.g., rubber). The reinforcing ring 110X is made of metal or the like, and the gasket main body portion 120X is integrally provided on the reinforcing ring 110X. In this embodiment, for example, the reinforcing ring 110X is used as an insert part, and the gasket main body portion 120X is formed by insert molding, whereby the gasket 100X can be obtained.

[0063] In the reinforcing ring 110X of this embodiment, similar to the case of the first embodiment above, it has a body portion 111 and a bent portion 112. In addition, in the gasket main body portion 120X of this embodiment, similar to the case of the first embodiment above, it includes an annular lip portion 121, a first annular protrusion 122, and a second annular protrusion 123. Regarding the configurations of these lip portion 121, first annular protrusion 122, and second annular protrusion 123, since they are the same as those in the first embodiment, the description thereof is omitted.

[0064] Regarding including the outer peripheral side annular protrusion 125 on the outer peripheral surface side of the gasket main body portion 120, it is also the same as the case of the first embodiment. In addition, in the case of this embodiment, an annular small protrusion 126 is provided at a position that does not affect the sealing performance between the first annular protrusion 122 and the outer peripheral side annular protrusion 125. This small protrusion 126 is provided for identifying the type of the gasket 100, etc., and is not necessary.

[0065] It should be noted that the configuration of the sealing structure including the gasket 100X of this embodiment is the same as that of the first embodiment above, so the description thereof is omitted. For the gasket 100X and the sealing structure of this embodiment configured as described above, the same effects as those of the first embodiment can also be obtained.

[0066] In the above embodiment, as an example of the first member 200 and the second member 300, an example is shown in which the insertion portion 310 provided on the second member 300 is inserted into the opening portion 210 provided on the first member 200 (e.g., a connector and a housing). However, regarding the first member and the second member in the present invention, it is not limited to such a configuration. For example, for the sealing structure of the portion where pipes are connected to each other, the gasket and the sealing structure of the present invention can also be applied.

[0067] Description of reference numerals

[0068] 100, 100X Gasket

[0069] 110, 110X Reinforcing ring

[0070] 111 Body portion

[0071] 112 Bend portion

[0072] 120, 120X Gasket main body portion

[0073] 121 Lip

[0074] 122 First annular protrusion

[0075] 123 Second annular protrusion

[0076] 125 Outer peripheral side annular protrusion

[0077] 126 Small protrusion

[0078] 200 First component

[0079] 210 Opening portion

[0080] 220 Assembled portion

[0081] 221 End face

[0082] 222 Inner peripheral surface

[0083] 300 Second component

[0084] 310 Insertion portion

[0085] 320 Opposite face

Claims

1. A gasket for closing the gap between a first member and a second member, wherein the first member has an opening and an annular and notched portion to be assembled provided along the opening edge of the opening, the second member is fixed to the first member, and the gasket is characterized by comprising: A reinforcing ring having: a body portion extending from the first member side toward the second member side; And a bent portion bent inward from the end portion on the first member side in the body portion; And A gasket main body portion made of an elastic body, integrally provided on the reinforcing ring, And the gasket main body portion includes: An annular lip portion that is pressed against the opposing surface of the second member opposite to the first member and is closely attached to the opposing surface in a state of being bent inward; A first annular protrusion that is compressed and closely attached to the end surface of the portion to be assembled opposite to the second member; and A second annular protrusion provided at a position closer to the inside than the first annular protrusion and compressed and closely attached to the end surface, The gasket includes an outer peripheral side annular protrusion that is closely attached to the inner peripheral surface of the portion to be assembled, The protruding height of the second annular protrusion is configured to be less than the protruding height of the first annular protrusion.

2. A sealing structure, comprising: A first member having an opening and an annular and notched portion to be assembled provided along the opening edge of the opening; A second member fixed to the first member; And A gasket for closing the gap between the first member and the second member, The sealing structure is characterized in that the gasket includes: A reinforcing ring having: a body portion extending from the first member side toward the second member side; and a bent portion bent inward from the end portion on the first member side in the body portion; and A gasket main body portion made of an elastic body, integrally provided on the reinforcing ring, And the gasket main body portion includes: An annular lip portion that is pressed against the opposing surface of the second member opposite to the first member and is closely attached to the opposing surface in a state of being bent inward; A first annular protrusion that is compressed and closely attached to the end surface of the portion to be assembled opposite to the second member; and A second annular protrusion provided at a position closer to the inside than the first annular protrusion and compressed and closely attached to the end surface, The gasket main body portion includes an outer peripheral side annular protrusion that is closely attached to the inner peripheral surface of the portion to be assembled, The protruding height of the second annular protrusion is configured to be less than the protruding height of the first annular protrusion.

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