Sealing member, sealing structure

Abstract

To make it difficult for the first sealing projection to detach from the second structure as the penetrating body moves in the first direction. [Solution] A sealing member 40 that seals the space between a movable pin device 30 positioned axially aligned with a panel material 20 and with a gap G in between, and a pin 36 that penetrates the panel material 20 and the movable pin device 30 along its axis and is reciprocally movable along its axis, the sealing member 40 having a first annular portion 44 having a first sealing projection 45 that seals the space between itself and the movable pin device 30, and a second annular portion 46 that slidably contacts the pin 36, wherein the first annular portion 44 further has a projection 50 that protrudes in a first direction from the first sealing projection 45 and contacts the panel material 20.

Description

Technical Field

[0001] The present invention relates to a sealing member and a sealing structure.

Background Art

[0002] A sealing member for sealing between a penetrator that reciprocates on an axis and a holding portion that holds the penetrator is known (for example, Patent Document 1). The sealing member described in Patent Document 1 is provided in a sliding gap between a cylinder (holding portion) and a rod (penetrator) in a hydraulic and pneumatic device, and has an annular shape that is placed in a seal groove provided in the cylinder. This sealing member includes an outer lip portion that contacts the cylinder and an inner lip portion that contacts the rod. The outer lip portion and the inner lip portion are connected by a connecting portion that partitions the high-pressure side and the low-pressure side and forms an end surface. An annular sealing member having an outer lip portion, an inner lip portion, and a connecting portion and having a shape different from that of Patent Document 1 is known (for example, Patent Document 2). The sealing member described in Patent Document 2 includes an inner cylindrical portion (inner lip portion) having a diameter gradually decreasing portion whose diameter gradually decreases in one direction along the axis, an outer cylindrical portion (outer lip portion) having a diameter gradually increasing portion whose diameter gradually increases in one direction, and an annular connecting portion (connecting portion) that connects the inner cylindrical portion and the outer cylindrical portion at the ends on the one-direction side and the opposite side. The outer cylindrical portion includes an extended cylindrical portion extending in the one direction from the end portion on the one-direction side of the diameter gradually increasing portion. The outer diameter of the extended cylindrical portion gradually decreases in one direction.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0004] When sealing the space between a penetrating body and a retaining body using an annular sealing member having an outer lip portion, an inner lip portion, and a connecting portion, the sealing groove provided in the retaining portion may be stepped, with the portion opposite to the connecting portion being open. In this case, when the penetrating body moves from the opposite side toward the connecting portion, the sealing member may move in conjunction with the movement of the penetrating body, potentially causing the outer lip portion to fall out of the sealing groove. To prevent such detachment of the outer lip portion from the sealing groove, an extension tube portion, as described in Patent Document 2, may be provided on the outer lip portion, and the extension tube portion may be brought into contact with a structure provided on the opening side of the sealing groove, which forms a gap between the extension tube portion and the retaining portion. The structure is configured as separate components for the sealing member, the penetrating body, and the retaining portion, respectively. The sealing member that brings the extension tube portion into contact with the structure may be susceptible to various problems due to the axial component of the elastic force generated by the contact between the extension tube portion and the structure.

[0005] The purpose of this disclosure is to make it difficult for the first sealing projection to detach from the second structure as the penetrating body moves in the first direction. [Means for solving the problem]

[0006] Aspects of the present disclosure include a sealing member for sealing between a second structure positioned adjacent to and with a gap between it and a first structure on an axis extending axially, and a penetrating body that penetrates the first structure and the second structure along the axis and is reciprocally movable along the axial direction, A first annular portion that contacts the second structure and has a first sealing projection that seals the space between the second structure and the first annular portion, A second annular portion that slidably contacts the aforementioned penetrating body, A connecting portion that connects the first annular portion and the second annular portion at the end opposite to the first direction, which is moving from the second structure side toward the first structure side along the axial direction, It has, The first annular portion is a sealing member having a projection that protrudes further in the first direction than the first sealing projection and contacts the first structure.

[0007] Another aspect of the present disclosure is a first annular portion provided around an axis, the first annular portion having a first sealing projection provided at an end in a first direction along the axis and convex radially outward, A second annular portion is provided spaced radially inward from the first annular portion, A connecting portion that connects the first annular portion and the second annular portion at the end opposite to the first direction, A protruding portion that protrudes in the first direction from the first sealing protrusion, wherein the first distance between the center of the wall thickness and the axis increases as it advances in the first direction, It is a sealing member having [a certain characteristic]. [Effects of the Invention]

[0008] According to the embodiments of this disclosure, the first sealing projection is less likely to detach from the second structure as the penetrating body moves in the first direction.

[0009] According to other aspects of the present disclosure, the axial component of the elastic force generated by contact between a protrusion and a structure positioned spaced apart from the protrusion in a first direction can be reduced. [Brief explanation of the drawing]

[0010] [Figure 1] This is a schematic cross-sectional view of the lock pin structure according to the embodiment. [Figure 2] This is a cross-sectional view of a sealing structure according to an embodiment. [Figure 3] This is a cross-sectional view of a sealing member according to an embodiment. [Figure 4] This is a perspective view of the sealing member according to the embodiment. [Figure 5] This is a cross-sectional view of a sealing member provided in a second structure according to the embodiment. [Figure 6]Cross-sectional view of the seal member provided in the second structure according to the comparative form. [Figure 7] Cross-sectional view of the seal member provided in the second structure according to the comparative form. [Figure 8] Cross-sectional view of the seal member according to the comparative form. [Figure 9] Cross-sectional view of the seal member provided in the second structure according to the comparative form. [Figure 10] Perspective view of the seal member according to another embodiment.

Mode for Carrying Out the Invention

[0011] Hereinafter, embodiments according to the present disclosure will be described with reference to the drawings. The scale of the drawings is not necessarily accurate, and some features may be exaggerated or omitted. In the description shown below, the axis of the seal member is taken as the X-axis or axis X. The direction from the first member to the second member is taken as the -X direction. The direction from the second member to the first member is taken as the +X direction. Also, in the radial direction with respect to the axial direction, the direction away from the central axis is taken as the outer radial direction. In the radial direction with respect to the axial direction, the direction toward the central axis is taken as the inner radial direction.

[0012] The seal member 40 according to the embodiment is applied to the lock pin structure 10. The lock pin structure 10 is a charging system for equipment (not shown) such as an electric vehicle, and is applied to a charging system using a plug and an inlet. Note that the application target of the seal member according to the present disclosure is not limited to the lock pin structure used in a charging system using a plug and an inlet. The seal member according to the present disclosure may be applied to a lock pin structure used in a fuel supply system using a fuel nozzle and a fuel inlet port. The lock pin structure 10 according to the embodiment has, as shown in FIG. 1, a plug 11, an inlet 12, and a movable pin device 30. The plug 11 is provided on a charging gun (not shown) of a power supply device (not shown) capable of supplying power to the device. The plug 11 is detachable from the inlet 12. The plug 11 has a latch portion 11a. When the plug 11 is attached to the inlet 12, the latch portion 11a engages with the inlet 12. The inlet 12 is provided on the device. The inlet 12 is formed in a concave shape with respect to the panel material 20 of the device. The panel material 20 is provided as an exterior of the device. The inlet 12 is open to the outside of the device. The inlet 12 is capable of attaching the plug 11 so as to accommodate the plug 11 inside. The inlet 12 has a latch portion 12a. The latch portion 12a protrudes to the outside of the device with respect to the panel material 20 of the device. When the inlet 12 is attached with the plug 11, as shown in FIG. 1, the latch portion 12a engages with the latch portion 11a of the plug 11.

[0013] The panel material 20 has a mounting portion 22. The mounting portion 22 is provided on the inner surface of the panel material 20. The inner surface of the panel material 20 faces the inside of the device. The mounting portion 22 is concave with respect to the inner surface of the panel material 20. The mounting portion 22 is capable of attaching a movable pin device 30. The panel material 20 is an example of a first structure. As shown in FIG. 2, the mounting portion 22 has a bottom portion 22b, a wall portion 22a, and a through hole 20a. The bottom portion 22b is the bottom of the concave mounting portion 22. The bottom portion 22b contacts a protruding portion 50 of a seal member 40 described later. The wall portion 22a extends from the inner surface of the panel material 20 to the bottom portion 22b and surrounds the bottom portion 22b. The wall portion 22a is, for example, in the shape of a cylindrical surface facing the radially inner side. The through hole 20a penetrates the panel material 20 from the bottom portion 22b toward the outer surface of the panel material 20. The through hole 20a extends along the X direction. The through hole 20a is, for example, cylindrical. A pin 36 of the movable pin device 30 described later can pass through the through hole 20a. The through hole 20a overlaps with the axis X when viewed from the axial direction.

[0014] The movable pin device 30 locks the latch portion 11a to the latch portion 12a when the latch portion 11a engages with the latch portion 12a as the plug 11 is installed into the inlet 12, preventing it from disengaging. In other words, the movable pin device 30 operates to maintain the engaged state of the latch portion 11a with respect to the latch portion 12a, in response to the engagement operation of the latch portion 11a with respect to the latch portion 12a. As shown in Figure 1, the movable pin device 30 is attached to the panel material 20 with a gap G formed between it and the bottom portion 22b of the mounting portion 22. That is, the movable pin device 30 is positioned on the axis X with respect to the panel material 20 and with the gap G in between. The movable pin device 30 is an example of a second structure. The movable pin device 30 has a holding portion 32, a movable portion 35, and a sealing member 40 (not shown in Figure 1). The holding portion 32, the movable portion 35, and the sealing member 40 constitute the sealing structure 38 in the movable pin device 30, as shown in Figure 2.

[0015] As shown in Figure 1, the retaining portion 32 is provided to cover the mounting portion 22 from the inside of the device. The retaining portion 32 forms a gap G between itself and the bottom portion 22b of the mounting portion 22. The retaining portion 32 holds the pin 36 so that it can reciprocate around the through hole 20a. As shown in Figure 2, the retaining portion 32 has a main body portion 32a, a fitting portion 32b, a stepped portion 34, and a hole portion 33.

[0016] As shown in Figure 1, the main body portion 32a is in contact with the panel material 20 around the mounting portion 22. The main body portion 32a may also be connected to the panel material 20 by connecting members such as bolts. The fitting portion 32b protrudes from the main body portion 32a toward the panel material 20. The fitting portion 32b is inserted inside the mounting portion 22. The fitting portion 32b engages with the wall portion 22a of the mounting portion 22, as shown in Figure 2. The fitting portion 32b has an end face 32c. The end face 32c faces toward the bottom portion 22b of the mounting portion 22. The end face 32c forms a gap G between itself and the bottom portion 22b.

[0017] The stepped portion 34 is concave relative to the end face 32c, as shown in Figure 2. The stepped portion 34 has a stepped surface 34b and a wall portion 34a. The stepped surface 34b is the bottom of the concave stepped portion 34. The stepped surface 34b is in contact with the connecting portion 42 of the sealing member 40. The wall portion 34a extends from the end face 32c to the stepped surface 34b and surrounds the stepped surface 34b. The wall portion 34a is, for example, a cylindrical surface facing radially inward. The wall portion 34a is in contact with the first annular portion 44 of the sealing member 40.

[0018] The hole 33 extends from the stepped surface 34b of the stepped portion 34 to the -X side end of the main body portion 32a and passes through the holding portion 32. The hole 33 extends along the X direction. The hole 33 is, for example, cylindrical. The hole 33 is coaxial with the through hole 20a. The hole 33 holds the pin 36 so that it can slide and reciprocate.

[0019] The movable part 35 operates in conjunction with the engagement operation of the latch portion 11a of the plug 11 and the latch portion 12a of the inlet 12, in order to maintain the engaged state of the latch portion 11a and the latch portion 12a. As shown in Figure 1, the movable part 35 has a pin 36 and a mechanism 37.

[0020] As shown in Figure 2, the pin 36 is positioned to penetrate the through-hole 20a of the panel material 20 and the hole 33 of the retaining portion 32. The pin 36 is an example of a penetrating body. The pin 36 extends along axis X. Preferably, both ends of the pin 36 in the longitudinal direction protrude outward relative to the retaining portion 32. The pin 36 is, for example, cylindrical. The pin 36 is coaxial with the through-hole 20a and the hole 33. The pin 36 has a cylindrical surface 36a. The cylindrical surface 36a faces radially outward. As shown in Figure 1, the pin 36 is reciprocally movable between a first position and a second position on axis X by the mechanism 37. The second position is on the +X side of the first position. When the pin 36 is in the first position, the +X side tip of the pin 36 does not obstruct the attachment and detachment of the plug 11 to the inlet 12. When the pin 36 is in the second position, the +X side tip of the pin 36 protrudes outward from the panel material 20, and clamps the latch portion 11a of the plug 11 attached to the inlet 12 with the latch portion 12a. By being in the second position, the pin 36 locks the plug 11 attached to the inlet 12. At this time, the plug 11 is in a locked state.

[0021] The mechanism 37 is connected to the -X end of the pin 36. The mechanism 37 is configured to move the pin 36 from a first position to a second position in conjunction with the engagement operation of the latch portion 11a of the plug 11 and the latch portion 12a of the inlet 12. To release the locked state of the plug 11, the user (not shown) performs a release operation on the pin 36 in the second position. The release operation is, for example, pushing the +X end of the pin 36 in the second position toward the -X side. In response to the release operation, the mechanism 37 operates to fix the pin 36 in the first position. At this time, the plug 11 is released from its locked state. The mechanism 37 may include a motor-driven actuator. The release operation on the pin 36 may be performed remotely using an input device such as a push-button switch.

[0022] <Sealing member 40> As shown in Figure 2, the sealing member 40 is positioned between the stepped portion 34 and the pin 36. The sealing member 40 seals the space between the pin 36 and the retaining portion 32. The sealing member 40 prevents foreign matter from entering the sliding portion between the hole 33 and the pin 36 from the outside of the sealing member 40. The sealing member 40 is a hollow cylindrical shape extending along axis X, as shown in Figures 3 and 4. The sealing member 40 is annular with axis X as its centerline. Preferably, the sealing member 40 is coaxial with the through hole 20a and the hole portion 33. The sealing member 40 is formed from an elastomer. Preferably, the elastomer forming the sealing member 40 is one of nitrile rubber (NBR), hydrogenated nitrile rubber (H-NBR), acrylic rubber (ACM), fluororubber (FKM), silicone rubber, or styrene-butadiene rubber (SBR). The sealing member 40 has a first annular portion 44, a second annular portion 46, and a connecting portion 42. The first annular portion 44, the second annular portion 46, and the connecting portion 42 are integrally formed.

[0023] The first annular portion 44 contacts the wall portion 34a of the retaining portion 32, as shown in Figures 2 and 3. The first annular portion 44 has a cylindrical surface 44a. The cylindrical surface 44a faces radially outward and contacts the wall portion 34a. The first annular portion 44 has a first sealing projection 45 and a protruding portion 50.

[0024] The first sealing projection 45 is convex, extending radially outward from the cylindrical surface 44a along its entire circumference. The first sealing projection 45 is positioned away from the end of the sealing member 40 on the side that contacts the stepped surface 34b of the retaining portion 32, on the +X side. When the sealing member 40 is positioned between the retaining portion 32 and the pin 36, the first sealing projection 45 deforms to conform to the shape of the wall portion 34a, thereby sealing the space between the retaining portion 32 and the wall portion 34a. The first sealing projection 45 has a base 45a. The base 45a is the +X side root of the convex first sealing projection 45 relative to the apex. The base 45a is located -X side of the end face 32c of the retaining portion 32. That is, the base 45a is located -X side of the gap G. The portion of the first annular portion 44 on the -X side of the base 45a is superior in sealing the space between the annular portion 44 and the wall portion 34a than the portion of the first annular portion 44 on the +X side of the base 45a. The first annular portion 44 and the projection 50 in this disclosure are distinguished by the base 45a as the boundary. Details regarding the protruding portion 50 will be described later.

[0025] The second annular portion 46 is formed radially inward from the first annular portion 44, as shown in Figures 2 and 3. The second annular portion 46 is in slidable contact with the cylindrical surface 36a of the pin 36. The second annular portion 46 has an inclined surface 46a. The inclined surface 46a is inclined with respect to the X direction and faces radially inward, and faces the cylindrical surface 36a. The distance between the inclined surface 46a and the axis X decreases as it progresses in the +X direction. The second annular portion 46 has a second sealing projection 47.

[0026] The second sealing projection 47 is convex, extending radially inward from the inclined surface 46a along its entire circumference. The second sealing projection 47 is provided away from the end of the sealing member 40 on the side that contacts the stepped surface 34b of the retaining portion 32, on the +X side. When the sealing member 40 is positioned between the retaining portion 32 and the pin 36, the second sealing projection 47 elastically deforms to conform to the shape of the pin 36, thereby sealing the space between the pin 36 and the sealing member 40.

[0027] The connecting portion 42 connects the -X end of the first annular portion 44 and the -X end of the second annular portion 46. When the sealing member 40 is positioned between the holding portion 32 and the pin 36, the connecting portion 42 contacts the stepped surface 34b of the stepped portion 34.

[0028] <Protrusion 50> The projection 50 extends around the entire circumference of the first annular portion 44, protruding from the base 45a of the first annular portion 44 toward the +X side. That is, the projection 50 protrudes toward the +X side of the first annular portion 44 with the base 45a as the boundary. When the sealing member 40 is positioned between the holding portion 32 and the pin 36, it is preferable that the projection 50 contacts the inner surface of the panel material 20. The thickness of the projection 50 is preferably smaller than the thickness of the first annular portion 44. The thickness of the projection 50 at the base 45a is preferably larger than the width of the gap G in the X direction. The projection 50 has a tip portion 52, an outer peripheral surface 54, and an inner peripheral surface 56.

[0029] The tip portion 52 is the +X side end of the protruding portion 50. The tip portion 52 contacts the bottom portion 22b of the mounting portion 22. When the holding portion 32 on which the sealing member 40 is placed is attached to the mounting portion 22 of the panel material 20, the tip portion 52 undergoes elastic deformation. At this time, the tip portion 52 seals the space between itself and the bottom portion 22b of the mounting portion 22. At this time, it is preferable that the tip portion 52 undergoes elastic deformation toward the gap G, as shown in Figure 2. At this time, the protruding portion 50 imparts an elastic force to the first annular portion 44 that is directed in the -X direction in accordance with the elastic deformation of the tip portion 52.

[0030] As shown in Figure 3, the outer circumferential surface 54 faces radially outward from the protrusion 50. The distance R3 between the outer circumferential surface 54 and the axis X preferably increases as it progresses in the +X direction. At the tip 52, the outer circumferential surface 54 has a larger diameter than the wall portion 34a of the stepped portion 34. At the tip 52, the outer circumferential surface 54 has a larger diameter than the top of the first seal protrusion 45. That is, the maximum diameter of the outer circumferential surface 54 is preferably larger than the maximum diameter of the first seal protrusion 45. The inclination angle of the outer circumferential surface 54 with respect to the axis X in a cross-sectional view is preferably 5 degrees or more and 30 degrees or less. The inclination angle of the outer circumferential surface 54 with respect to the axis X in a cross-sectional view is more preferably 5 degrees or more and 15 degrees or less.

[0031] The inner circumferential surface 56 faces radially inward of the protrusion 50. The distance R2 between the inner circumferential surface 56 and the axis X increases as the +X direction progresses. Preferably, the rate of increase of distance R2 in the +X direction is greater than the rate of increase of distance R3. The rate of increase of distance R2 or distance R3 in the +X direction is a dimensionless quantity that represents the increase in radial distance R2 or distance R3 for each unit length in the +X direction. Preferably, the inclination angle of the inner circumferential surface 56 with respect to the axis X in a cross-sectional view is 5 degrees or more and 30 degrees or less. More preferably, the inclination angle of the inner circumferential surface 56 with respect to the axis X in a cross-sectional view is 15 degrees or more and 25 degrees or less.

[0032] The thickness of the protruding portion 50 preferably decreases as it progresses in the +X direction. The thickness of the protruding portion 50 is the radial distance between the outer circumferential surface 54 and the inner circumferential surface 56. The midpoint between the outer circumferential surface 54 and the inner circumferential surface 56 in the radial direction is defined as the thickness center TC. The thickness center TC is an example of the center of the thickness. The imaginary straight line connecting the thickness centers TC at each position in the X direction is the thickness centerline TL. The distance R1 between the thickness centerline TL (i.e., the thickness center TC) and the axis X increases as it progresses in the +X direction. The inclination angle of the thickness centerline TL with respect to the axis X in a cross-sectional view is preferably 5 degrees or more and 30 degrees or less. The inclination angle of the thickness centerline TL with respect to the axis X in a cross-sectional view is more preferably 15 degrees or more and 25 degrees or less.

[0033] As the plug 11 is mounted onto the inlet 12, the pin 36 moves in the +X direction, and the sealing member 40, which is in contact with the pin 36 at its inner circumferential surface 56, moves in the +X direction in conjunction with the movement of the pin 36. At this time, the sealing member 40 slides relative to the moving pin 36 and moves away from the stepped surface 34b. At this time, as shown in Figure 5, the sealing member 40 elastically deforms the protruding portion 50, which is in contact with the bottom portion 22b of the mounting portion 22, toward the gap G.

[0034] (Mechanism of Action and Effects) Next, the operation and effects of the sealing member 40 of the embodiment will be described. In this description, sealing members G40 and H40, which are comparative forms to the embodiment, will be described using Figures 6 to 9. When using the same parts as those used in the sealing member 40 of the embodiment in the description of sealing members G40 and H40, the same reference numerals and names of those parts will be used in the description.

[0035] The first comparative embodiment of the sealing member G40, as shown in Figure 6, has a first annular portion G44 instead of the first annular portion 44 of the sealing member 40. The first annular portion G44 does not have a protrusion 50 compared to the first annular portion 44 of the sealing member 40.

[0036] As shown in Figure 6, when the sealing member G40 of the first comparative form is placed between the retaining portion 32 and the pin 36, when the pin 36 moves in the +X direction, the sealing member G40 moves in the +X direction in conjunction with the movement of the pin 36. At this time, since the sealing member G40 does not have a protruding portion 50, there is a risk that the first sealing projection 45 will move to the +X side until it falls off the stepped portion 34, as shown in Figure 7. In other words, when the sealing member G40 is placed between the retaining portion 32 and the pin 36, there is a risk that the sealing performance between the sealing member G40 and the retaining portion 32 will deteriorate as the pin 36 moves.

[0037] The second comparative form of the sealing member H40, as shown in Figure 8, has a first annular portion H44, a protruding portion H50, a tip portion H52, and an outer circumferential surface H54 instead of the first annular portion 44, a protruding portion 50, and an outer circumferential surface 54 of the sealing member 40. When the retaining portion 32 on which the sealing member H40 is placed is attached to the mounting portion 22 of the panel material 20, the tip portion H52 of the protruding portion H50 comes into contact with the bottom portion 22b of the mounting portion 22. The distance HR3 between the outer surface H54 and the axis X decreases as it progresses in the +X direction. At the tip H52, the outer surface H54 has a smaller diameter than the apex of the first seal protrusion 45. The distance HR1 between the wall thickness center line HTL (i.e., wall thickness center HTC) of the protrusion H50 and the axis X decreases as it progresses in the +X direction.

[0038] As shown in Figure 9, when the sealing member H40 of the second comparative form is positioned between the holding portion 32 and the pin 36 and contacts the bottom portion 22b of the mounting portion 22, an elastic force acts on the protruding portion H50 in conjunction with the contact with the bottom portion 22b. Due to the shape of the protruding portion H50, this elastic force does not easily act in a direction that deforms the protruding portion H50 toward the gap G. In other words, the elastic force generated in conjunction with the contact between the protruding portion H50 and the bottom portion 22b tends to act in a direction along the axis X. Therefore, the elastic force generated in conjunction with the contact between the protruding portion H50 and the bottom portion 22b tends to adversely affect the mountability of the holding portion 32 to the mounting portion 22. Furthermore, the elastic force generated in conjunction with the contact between the protruding portion H50 and the bottom portion 22b tends to act in a way that deforms the panel material 20 around the through hole 20a. Furthermore, when the pin 36 moves in the +X direction, the sealing member H40 moves in the +X direction in conjunction with the movement of the pin 36. At this time, the sealing member H40 slides relative to the moving pin 36 and moves away from the stepped surface 34b. At this time, the elastic force generated by the contact between the protrusion H50 and the bottom 22b increases with the movement of the sealing member H40. Due to the shape of the protrusion H50, this increased elastic force may cause the protrusion H50 to deform toward the axis X. If the protrusion H50 deforms toward the axis X as the pin 36 moves, there is a risk that the protrusion H50 will become caught in the moving pin 36. Furthermore, if the protrusion H50 deforms toward the axis X as the pin 36 moves, the protrusion H50 will become more prone to further deformation toward the axis X when the pin 36 moves further in the +X direction. As a result of the protrusion H50 continuing to deform toward the axis X, there is a risk that the sealing member H40 will cause the first sealing projection 45 to detach from the stepped portion 34. If the first sealing projection 45 detaches from the stepped portion 34, the sealing performance of the sealing member H40 between the stepped portion 34 of the movable pin device 30 will decrease. If the first sealing projection 45 detaches from the stepped portion 34 as the pin 36 moves in the +X direction, the first sealing projection 45 will have difficulty returning to the stepped portion 34 even if the pin 36 moves in the -X direction afterward. Thus, when the sealing member H40 is placed between the holding portion 32 and the pin 36, due to the shape of the protruding portion H50, there is a risk that various problems may occur due to the elastic force generated when the protruding portion H50 comes into contact with the mounting portion 22.

[0039] On the other hand, in the sealing member 40 of the sealing structure 38 of the embodiment, the distance R1 between the wall thickness centerline TL of the protrusion 50 and the axis X increases as it progresses in the +X direction. That is, the protrusion 50 of the sealing member 40, which is positioned between the holding portion 32 and the pin 36, extends toward the gap G. Therefore, when the protrusion 50 of the sealing member 40 comes into contact with the bottom portion 22b of the mounting portion 22, the protrusion 50 elastically deforms so as to enter the gap G and move radially outward. At this time, the elastic force generated by the contact between the protrusion 50 and the bottom portion 22b is less likely to act in the direction along the axis X. That is, the axial component of the elastic force generated by the contact between the protrusion 50 and the bottom portion 22b is reduced compared to that of the sealing member H40. In other words, the sealing member 40 of the sealing structure 38 can reduce the axial component of the elastic force generated by the contact between the protrusion 50 and the mounting portion 22. Therefore, the elastic force generated by the contact between the protrusion 50 and the bottom 22b is unlikely to adversely affect the ease with which the holding portion 32 can be attached to the mounting portion 22. Furthermore, the elastic force generated by the contact between the protrusion 50 and the bottom 22b is unlikely to deform the panel material 20 around the through hole 20a.

[0040] The first annular portion 44 further has a protrusion 50. The second annular portion 46 is in slidable contact with the pin 36. Therefore, when the pin 36 moves in the +X direction, an external force acts on the sealing member 40 that causes it to move away from the pin 36 in the +X direction. At this time, the protrusion 50 is in contact with the bottom portion 22b of the panel material 20, making it difficult for the first sealing projection 45 to fall off the stepped portion 34 of the movable pin device 30. In other words, the sealing member 40 of the sealing structure 38, by having the protrusion 50, is less likely to cause the first sealing projection 45 to fall off the stepped portion 34 of the movable pin device 30 as the pin 36 moves in the +X direction. As a result, the sealing member 40 can suppress the decrease in sealing performance between the sealing member H40 and the stepped portion 34 as the pin 36 moves in the +X direction. Furthermore, the sealing member H40 of the second comparative form described above has a protruding portion H50, which makes it less likely for the first sealing protrusion 45 to fall off the stepped portion 34 of the movable pin device 30 as the pin 36 moves in the +X direction. Furthermore, when the sealing member 40 moves in the +X direction in conjunction with the movement of the pin 36 in the +X direction, the sealing member 40 causes the protruding portion 50, which is elastically deformed to enter the gap G and extend radially outward, to enter the gap G further and extend radially outward. Therefore, the sealing member 40 is less likely to cause the protruding portion 50 to become caught in the pin 36 moving in the +X direction. In other words, the sealing member 40 is less likely to cause the first lip portion 45 to fall off as the pin 36 moves in the +X direction.

[0041] When the tip portion 52 contacts the bottom portion 22b of the mounting portion 22 and undergoes elastic deformation, the protruding portion 50 imparts an elastic force directed in the -X direction to the first annular portion 44 in accordance with the elastic deformation. As a result, the sealing member 40 is prevented from moving in the +X direction in conjunction with the movement of the pin 36 in the +X direction.

[0042] The distance R2 between the inner circumferential surface 56 and the axis increases as it progresses in the +X direction. Therefore, the sealing member 40 is easily elastically deformed so that the protruding portion 50 enters the gap G and moves radially outward upon contact with the bottom portion 22b of the mounting portion 22.

[0043] The distance R3 between the outer surface 54 and the axis increases as it progresses in the +X direction. Therefore, the sealing member 40 is easily elastically deformed so that the protruding portion 50 further enters the gap G and moves radially outward upon contact with the bottom portion 22b of the mounting portion 22.

[0044] The rate of increase of distance R2 in the +X direction is greater than the rate of increase of distance R3. Therefore, the sealing member 40 is more likely to elastically deform, causing the protruding portion 50 to enter the gap G further and move radially outward upon contact with the bottom portion 22b of the mounting portion 22.

[0045] The outer circumferential surface 54 at the tip portion 52 has a larger diameter than the top of the first sealing projection 45. Therefore, when the sealing member 40 is in contact with the bottom portion 22b of the mounting portion 22 and undergoes elastic deformation, it is less likely to undergo elastic deformation that would degrade the sealing performance of the first sealing projection 45. In other words, the sealing member 40 can maintain the sealing performance of the first sealing projection 45 when it is in contact with the bottom portion 22b of the mounting portion 22 and undergoes elastic deformation.

[0046] The protruding portion 50 seals the space between itself and the bottom portion 22b of the mounting portion 22 by elastically deforming the tip portion 52 that comes into contact with the bottom portion 22b of the mounting portion 22. Therefore, the sealing member 40 can suppress the ingress of foreign matter from the radially outer to the radially inner direction relative to the protruding portion 50.

[0047] The base portion 45a is positioned further away from the gap G on the -X side. Therefore, the sealing structure 38 can maintain the sealing performance between the pin 36 and the stepped portion 34 when the sealing member 40 moves in conjunction with the movement of the pin 36 to the +X side.

[0048] As described above, an embodiment of the present invention has been explained as an example, but the present invention is not limited to the above-described embodiment, and various modifications, changes, and improvements are possible within the scope of the technical idea of ​​the present invention.

[0049] In the embodiment described above, the projection 50 protrudes from the base 45a of the first annular portion 44 towards the +X side, extending around the entire circumference of the first annular portion 44. However, the projection according to this disclosure is not limited to the form in which the projection protrudes from the base 45a of the first annular portion towards the +X side, extending around the entire circumference of the first annular portion. The projection according to this disclosure may be in the form of the projection 250 of the sealing member 240 shown in Figure 10. Details of the sealing member 240 and the projection 250 are shown below. The holding portion 32, the movable portion 35, and the sealing member 240 constitute a sealing structure 238 (not shown) in the movable pin device 30. The sealing member 240 has a first annular portion 244 in place of the first annular portion 44 of the sealing member 40. The first annular portion 244 has a plurality of protrusions 250 in place of the protrusion 50. The first annular portion 244 further has a lip-side end face 245b.

[0050] As shown in Figure 10, each of the multiple protrusions 250 is spaced apart from the first annular portion 244 in the circumferential direction with respect to the axis X, with the base portion 45a as the boundary, and protrudes to the +X side. The protrusions 250 of the sealing member 240 do not have the function of sealing the space between them and the mounting portion 22 by contacting the bottom portion 22b of the mounting portion 22.

[0051] The lip-side end face 245b is located between two adjacent projections 250 in the circumferential direction. In the X direction, the lip-side end face 245b is positioned between the base 45a of the first seal projection 45 and the tip 252 of the projection 250. The lip-side end face 245b faces the +X direction. In the embodiment shown in Figure 10, the sealing member 240 has four protrusions 250 and four lip-side end faces 245.

[0052] The multiple protrusions 250 are spaced apart from each other in the circumferential direction, making them more elastically deformable radially outward than the protrusion 50. Therefore, the elastic force generated by the protrusions 250 of the sealing member 240 in contact with the mounting portion 22 is smaller than that of the protrusions 50 of the sealing member 40. Thus, the sealing member 240 can reduce the load on the panel material 20 due to the elastic force generated in contact between the protrusions 250 and the mounting portion 22. Furthermore, the sealing member 240 can further reduce the adverse effect of the elastic force generated in contact between the protrusions 250 and the bottom portion 22b on the ease of mounting the holding portion 32 to the mounting portion 22. Furthermore, the sealing member 240 of the sealing structure 238 can achieve the same effect as the sealing member 40 of the sealing structure 38, except that it does not have the function of sealing between itself and the mounting portion 22.

[0053] The sealing member 240 has four protrusions 250. However, if the sealing member of this disclosure has a plurality of protrusions that are spaced apart from each other in the circumferential direction, the number of protrusions may be two or three, or five or more. [Explanation of Symbols]

[0054] 10. Locking pin structure 11 plugs 11a Latch section 12 Inlets 12a Latch section 20 Panel material (an example of the first structure) 20a Through hole 22 Mounting part 22b bottom 30. Movable pin device (an example of a second structure) 32 Holding part 33 Hole 34 Stepped section 34a wall 34b Step surface 35 Moving parts 36 pins (an example of a through-hole) 38 Sealed structure 40 sealing member 42 Connecting part 44 First Ring Section 45 First seal protrusion 45a base 46 Second ring section 50 Protrusion 52 Tip 54 Outer surface 56 Inner surface 240 sealing member 250 Protrusion G gap TC thickness center TL thickness center line R1 is the radial distance between the wall thickness center and the axis (first distance). R2 is the radial distance between the inner surface and the axis (the second distance). R3 is the radial distance between the outer surface and the axis (the third distance). X axis

Claims

1. A sealing member for sealing the space between a second structure positioned adjacent to a first structure on an axis extending axially with respect to the first structure and separated by a gap, and a penetrating body that penetrates the first structure and the second structure along the axis and is capable of reciprocating along the axial direction, A first annular portion that contacts the second structure and has a first sealing projection that seals the space between the second structure and the first annular portion, A second annular portion that slidably contacts the aforementioned penetrating body, A connecting portion that connects the first annular portion and the second annular portion at the end opposite to the first direction, which is moving from the second structure side toward the first structure side along the axial direction, It has, The sealing member wherein the first annular portion further has a projection that protrudes in the first direction more than the first sealing projection and contacts the first structure.

2. The sealing member according to claim 1, wherein the protruding portion has a first distance between the center of the thickness and the axis that increases as it advances in the first direction.

3. The sealing member according to claim 1 or claim 2, wherein the protruding portion applies an elastic force to the first annular portion that is oriented in the opposite direction to the first direction as a result of elastic deformation due to contact with the first structure.

4. The sealing member according to any one of claims 1 to 3, wherein the protruding portion has an inner circumferential surface in which the second distance from the axis increases as it advances in the first direction.

5. The sealing member according to any one of claims 1 to 4, wherein the protruding portion has an outer circumferential surface in which the third distance from the axis increases as it advances in the first direction.

6. The sealing member according to claim 5, wherein the rate of increase of the second distance in the first direction is greater than the rate of increase of the third distance in the first direction.

7. The sealing member according to claim 5 or 6, wherein the outer circumferential surface has a larger diameter than the first sealing projection at the tip of the protrusion.

8. The sealing member according to any one of claims 1 to 7, wherein the protruding portion seals the space between itself and the first structure.

9. The sealing member according to any one of claims 1 to 7, wherein the first annular portion has a plurality of protrusions, the plurality of protrusions being spaced apart from each other in the circumferential direction.

10. A second structure is positioned adjacent to the first structure on an axis extending axially and separated by a gap, A penetrating body that penetrates the first structure and the second structure along the axis, A sealing member according to any one of claims 1 to 9 is disposed between the second structure and the penetrating body, It has, The aforementioned protrusion is a sealing structure that extends toward the aforementioned gap.

11. The first sealing projection is convex in shape, projecting radially outward from the first annular portion. The first seal projection has a base which is the root on the first direction side relative to the convex apex, The sealing structure according to claim 10, wherein the base is positioned at a location away from the gap in the direction opposite to the first direction.

12. A first annular portion provided around an axis, the first annular portion having a first sealing projection provided at the end in a first direction along the axis and convex radially outward, A second annular portion is provided spaced radially inward from the first annular portion, A connecting portion that connects the first annular portion and the second annular portion at the end opposite to the first direction, A protruding portion that protrudes in the first direction from the first sealing protrusion, wherein the first distance between the center of the wall thickness and the axis increases as it advances in the first direction, A sealing member having the following characteristics.

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