Sealing arrangement structure

Abstract

A sealing arrangement structure configured to position a ring seal (1) between a first element (10A) and a second element, comprising the first element (10A) and the ring seal (1), wherein the seal (1) comprises an annular section main body (4) extending in an axial direction of the seal (1) and a projecting section (5) projecting from the annular section main body (4) in an outward direction or inward direction, wherein the first element (10A) is provided with a recessed section (25) configured to accommodate the projecting section (5) and formed in a shape corresponding to the projecting section (5), wherein the projecting section (5) is designed such that a circumferential dimension (L5) of an upper section (5A) thereof in a projection direction is larger than a circumferential dimension (L6) between base parts (P2) thereof, wherein a circumferential dimension (L3) of the excluded section (25) on a rear side in the projection direction is larger than a circumferential dimension (L4) of the excluded section (25) on a front side in the projection direction, and the circumferential dimension (L4) of the excluded section (25) on a front face in the projection direction is larger than the circumferential dimension (L5) of the upper section (5A) of the projecting section (5) in the projection direction.

Description

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

[0002] An automobile is equipped with various electronic devices and is provided with a wiring harness to supply power and transmit control signals and the like to these electronic devices. The wiring harness contains multiple electrical cables and a connector. This connector is inserted into a connector on the electronic device or into a connector on another wiring harness, thereby connecting the wiring harness to the electronic device and to the other wiring harness.

[0003] A connector used for such a wiring harness includes a known L-shaped connector configured to be attached to terminals of two shielded high-voltage cables used in an electric vehicle (EV) or hybrid electric vehicle (HEV), as disclosed, for example, in JP 2011-119 120 A (herein referred to as “JP’120”). Fig. Figure 9 is a perspective exploded view showing a conventional L-shaped connector. Fig. Figure 10 is a cross-sectional view showing an assembled state of the conventional L-shaped connector, as shown in Fig. 9, shows.

[0004] As in Fig. 9 and Fig. The conventional L-shaped connector shown in JP'120 includes an L-shaped inner housing 103 made of insulating resin and incorporates an L-shaped connector 102 (shown in JP'120). Fig. 10) a shielded sleeve 106 made of conductive metal, covering a horizontal tube section 104 of the inner housing 103, an aluminum housing 107 made of conductive metal, accommodating a vertical right-angled tube section 103A of the inner housing 103, an annular shielding gasket 108 made of rubber to provide water tightness between the shielded sleeve 106 and the aluminum housing 107, an outer housing 109 made of insulating resin, covering the shielded sleeve 106, and an annular housing gasket 110 made of rubber to provide water tightness between the shielded sleeve 106 and the outer housing 109.The housing seal 110 includes a projection 110A provided at its rear end, and this projection is inserted into and secured to a small hole 120 of a flange section 112 of the shielded sleeve 106 to fix the housing seal 110. Each of the seals 108, 110 is formed in a plate-like shape having a rectangular cross-section.

[0005] As in Fig. 9 and Fig. As shown in Figure 10, on the flange section 112 side of the shielded sleeve, the housing seal 110 is located between and almost on an outer surface of a peripheral wall 120, and on an inner surface of a peripheral wall 122 of the outer housing 109. An inner surface of a matching connector housing is almost adjacent to an outer surface of the housing seal 110. As a result, water droplets are prevented from entering the interior of the L-shaped connector 101 through a gap between the outer surface of the matching connector housing (not shown) and the inner surface of the outer housing 109.

[0006] However, the conventional L-shaped connector 101 has the following disadvantage. During assembly, the housing seal 110 of the conventional L-shaped connector 101 can be rotated relative to a predetermined position if an operator touches it. Specifically, in the conventional L-shaped connector 101, the projection 110a of the housing seal 110 is inserted into and fixed to the small hole 120 of the flange section 112 of the shielded sleeve 106 to secure the housing seal 110 to the shielded sleeve. This prevents the housing seal 110 from rotating relative to the predetermined position. However, if excessive force is applied, the projection 110a can be deformed and removed from the small hole 120, allowing the housing seal 110 to be rotated and displaced relative to the shielded sleeve 106.

[0007] Furthermore, US patent 5,879,178 A discloses a sealing arrangement structure configured to position an annular seal between a first element and a second element. The seal has an annular section main body extending in an axial direction of the seal and includes a projecting section extending from the annular section main body in an outward or inward direction. The first element has a recessed section configured to receive the projecting section and is formed in a shape corresponding to the projecting section. The projecting section is configured such that a circumferential dimension of an upper section of the same in a projection direction is larger than a circumferential dimension between base parts of the same, and the projecting section is fitted substantially without clearance in the recessed section.

[0008] One object of the present invention is to provide a sealing arrangement structure which limits the rotation of a seal and enables easy handling. This object is achieved according to the invention by a sealing arrangement structure with the features of independent claim 1. Preferred embodiments are set forth in the dependent claims.

[0009] According to a first aspect, a sealing arrangement structure configured to position an annular seal between a first element and a second element, comprising the first element and the annular seal, wherein the seal includes an annular section main body extending in an axial direction of the seal and a projecting section projecting from the annular section main body in an outward direction or inward direction, wherein the first element is provided with a recessed section configured to receive the projecting section and formed in a shape corresponding to the projecting section, wherein the projecting section is formed such that a circumferential dimension of an upper section of the same in a projection direction is larger than a circumferential dimension between base parts of the same.

[0010] According to a second aspect, the protruding section is formed in a trapezoidal shape.

[0011] According to a third aspect, the excluded section includes a first surface arranged to face the uppermost part of the projecting section, and a pair of second surfaces arranged between the first surface and a reference surface that can contact the ring-section main body. The first element is configured such that the angle between the reference surface and each of the second surfaces is an acute angle.

[0012] According to the present invention, as described above, when a force in the rotational direction is applied to the seal, the projecting section rests against an inner surface oriented in the rotational direction of the recessed section, such that the force on the projecting section is applied in a direction away from the ring-section main body. Consequently, even when the seal is subjected to a force in the rotational direction, the rotation of the projecting section relative to the recessed section can be prevented. As a result, the rotation of the seal can be prevented. Description of the drawings Fig. Figure 1 is a perspective view of a connector incorporating a sealing arrangement structure according to an embodiment of the present invention; Fig. Figure 2 is a perspective exploded view of the connector; Fig. 3 is a partial cross-sectional view along a line II line in Fig. 1; Fig. 4A is a cross-sectional view along a II-II line in Fig. 1; Fig. Figure 4B is an enlarged view of a section of the sealing arrangement structure shown in Fig. 4A; Fig. 5A is a perspective view showing a seal contained within the seal assembly structure; Fig. 5B is a cross-sectional view along a line III-III in Fig. 5A; Fig. 5C is an enlarged view of a section of Fig. 5B; Fig. 6A represents the application of force to the seal in a rotational direction; Fig. 6B represents an effect provided by the sealing arrangement structure; Fig. Figure 7 is a front view of a modified example of the sealing arrangement structure; Fig. Figure 8 is a front view of another modified example of the sealing arrangement structure; Fig. Figure 9 is a perspective exploded view of a conventional L-shaped connector; and Fig. Figure 10 is a cross-sectional view showing an assembled state of the conventional L-shaped connector, as shown in Fig. 9, shows. Detailed description of an exemplary embodiment of the invention

[0013] The following explains an exemplary embodiment of the present invention with reference to the drawings. Fig. Figure 1 is a perspective view of a connector 10 which includes a sealing arrangement structure according to an embodiment of the present invention. Fig. Figure 2 is a perspective exploded view of connector 10.

[0014] As shown in Fig. 1 and Fig. 2, the connector 10 of this embodiment includes a pair of receiving terminals 12, 12 (shown in Fig. 2) which are connected by a pair of shielding electrical cables 11, 11, to an inner housing 13 (shown in Fig. 2), a shielding sleeve 14 (shown in Fig. 2), and an outer housing 16 which has a hood section 15 into which a corresponding connector (not shown) is fitted. Hereinafter, the connector 10 is referred to as the “receiving connector 10” and the corresponding connector is referred to as the “insert connector”.

[0015] In this embodiment, the insertion direction of the receiving connector 10 to the insertion connector is referred to as a "front-back direction" or "axial direction," the extension direction of the pair of shielded electrical cables 11 is referred to as a "top-bottom direction," and a direction orthogonal to both "front-back direction" and "top-bottom direction" is referred to as a "right-left direction." Furthermore, from the "front-back direction," and when viewed from the receiving connector 10, the insertion connector side is referred to as "front," and the side spaced away from the insertion connector is referred to as "back."

[0016] As in Fig. As shown in Figure 2, the pair of receiving terminals 12, 12 is connected on one side to terminals of the pair of shielding electrical cables 11, 11. The inner housing 13 accommodates the receiving terminals 12, 12. The shielding sleeve 14 is shaped to cover the inner housing 13. The outer housing 16 includes the hood section 15 and a tube section 17, which is configured to guide the terminals of the shielding electrical cables 11, 11 to the outside.

[0017] Furthermore, the receiving connector 10 includes a front holder 18, which is attached to the hood section 15 and to which the plug-in connector is fitted, a ring seal 1 to ensure water sealing performance at a fitting section (not shown) of the receiving and plug-in connectors, a base seal 19, which is attached to the shielding electrical cables 11, 11, and a rear holder 20 which supports the base seal 19.

[0018] Furthermore, as in Fig. 1 and Fig. As shown in Figure 2, the receiving connector 10 is provided with a lever 16A which is rotatably mounted on the outer housing 16. By rotating the lever 16A while the connector housing of the insert connector is positioned close to the front holder 18 of the receiving connector, the receiving connector 10 and the insert connector can be engaged and disengaged relative to each other with minimal actuation force.

[0019] Fig. Figure 3 is a cross-sectional view, focusing on the positional relationship between the hood section 15 of the outer housing 16, the front bracket 18, and the seal 1. Fig. 3, an outer side wall 21 of the hood section 15, described later, is omitted. In this embodiment, as in Fig. As shown in Figure 3, the seal 1 is inserted and supported between the hood section 15 and the front holder 18, while it is positioned between the hood section 15, the front holder 18, and the connector housing (second element) of the push-in connector. In this embodiment, the hood section 15 and the front holder 18, which is to be attached to the hood section 15, are referred to as the "housing body 10A (first element)." The seal 1, positioned between the housing body 10A and the connector housing of the push-in connector, as described above, ensures the watertight seal of the fitting section (not shown) of the receiving and push-in connector.

[0020] Furthermore, as shown in Fig. 2 and Fig. 3. Restriction enclosure sections 15A, 18A (shown in Fig. 3) are formed on the hood section 15 and the front bracket 18, respectively. The restrictive housing sections 15A and 18A are configured to accommodate an insertion section 3 described later (shown in Fig. 2) to accommodate the seal 1 while the rotation of the seal 1 is restricted. In the following, the restriction housing section provided on the hood section 15 is referred to as the hood restriction housing section 15A, and the restriction housing section provided on the front holder 18 is referred to as the holder restriction housing section 18A.

[0021] As in Fig. 4A and Fig. As shown in Figure 4B, the hood section 15 includes a pipe outer wall section 21, a pipe inner wall section 22 arranged within the outer wall section 21, and an insertion groove 23 arranged between the outer wall section 21 and the inner wall section 22, through which the connector housing of the push-in connector is inserted.

[0022] The inner wall section 22 is defined by a perimeter wall 22A, which has a thickness as shown in Fig. 4B shown. As in Fig. As shown in Figure 3, the front holder 18 is attached, via the seal 1, to a front end surface 220 of the circumferential wall 22A. The hood-restriction housing section 15A is formed on this front end surface 220 of the circumferential wall 22A.

[0023] As in Fig. As shown in Figure 3, the hood-restriction housing section 15A is formed in a groove which is recessed with respect to the front end surface 220 (for example, the surface located on the front side of the holder 18) of the circumferential wall 22A. That is, the hood-restriction housing section 15A is open at its front. The hood-restriction housing section 15A is formed in a shape which can receive the insertion section 3 of the seal 1.

[0024] As in Fig. As shown in Figure 4A, the hood restraint housing section 15A includes a housing section main body 24 that accommodates an insert plate section 4 of the seal 1 described later, a restraint housing section 25 that accommodates a rotation restraint section 5 of the seal 1 described later, and a positioning housing section 26 that accommodates a positioning section 6 of the seal 1 described later.

[0025] As in Fig. As shown in Figure 3, the housing section main body 24 includes an outer circumferential surface 24A, an inner circumferential surface 24B arranged on an inner circumferential side of the outer circumferential surface 24A, and an inner-outer continuous surface 24C that is continuous with the outer circumferential surface 24A and with the inner circumferential surface 24B. Furthermore, the housing section main body 24 is designed such that its dimension L1 in an axial direction (for example, an axial dimension L1 of the inner circumferential surface 24B) is essentially equal to the axial dimension of the insertion plate section 4 of the seal 1, and that the dimension L2 in the direction orthogonal to the axial direction (for example, the dimension L2 of the inner-outer continuous surface 24C) is essentially equal to the plate thickness of the insertion plate section 4 of the seal 1.

[0026] As in Fig. As shown in Figure 3, the confining housing section 25 is positioned on the open side of the housing section main body 24 and is continuous with the outer circumferential surface 24A of the housing section main body 24. As shown in Fig. As shown in Figure 4B, the confining housing section 25 is bilaterally symmetrical and includes a parallel surface 25A (first surface) that is substantially parallel to the inner circumferential surface 24B, and a pair of inner surfaces 25B, 25B (pair of second surfaces) positioned between the parallel surface 25A and the outer circumferential surface 24A (reference surface) of the housing section main body 24. The pair of inner surfaces 25B, 25B are defined as flat surfaces. The pair of inner surfaces 25B, 25B is formed such that the angle between each of the inner surfaces 25B, 25B and the outer circumferential surface 24A of the housing section main body 24 is an acute angle θ1.In other words, a circumferential dimension L3 of the parallel surface 25A of the confining housing section 25 is larger than a circumferential dimension L4 between boundary locations P1 (base parts), corresponding to the boundary between each of the inner surfaces 25B and the outer circumferential surface 24A of the housing section main body 24 (for example, L3 > L4). Furthermore, in this embodiment, the circumferential dimension L4 between the boundary locations P1 of each of the inner surfaces 25B and the outer circumferential surface 24A of the housing section main body 24 is larger than a circumferential dimension L5 of a top surface 5A of the seal 1 (L4 > L5).

[0027] As in Fig. 2 and Fig. As shown in Figure 3, the front holder 18 includes a holder main body 27, which is to be inserted into the interior of the inner wall section 22, and a flange section 28, which is provided at a front end of the holder main body 27 and is positioned opposite the front end surface 220 of the inner wall section 22. As shown in Fig. As shown in Figure 3, a retainer-restriction housing section 18A is formed on a rear end surface 280 (for example, a surface on the inner wall section 22 side) of the flange section 28. The retainer-restriction housing section 18A is formed in a groove that is recessed with respect to the rear end surface 280 of the flange section 28. In this embodiment, the hood-restriction housing section 15A and the retainer-restriction housing section 18A differ only in the position of their formation and are designed to have a substantially identical shape. Therefore, detailed descriptions of the retainer-restriction housing section 18A are omitted.

[0028] Seal 1 is made of an elastic material, such as rubber. As in Fig. 5A, Fig. 5B and Fig. As shown in Figure C, the seal 1 includes a ring-type main body 2 (shown in Figure C). Fig. 5A) and a pair of insertion sections 3, each formed continuously with one side and the other side in the axial direction of the sealing main body 2, and configured to be received each in the holder-restriction housing section 18A and the hood-restriction housing section 15A.

[0029] The seal 1 is configured such that, in a fitted state of the receiving and inserting connector, the pair of insertion sections 3 are each received in the hood restriction housing section 15A and in the holder restriction housing section 18A, and the seal main body 2 contacts the inner surface of the connector housing of the inserting connector, thereby ensuring water sealing performance in the fitted section of the receiving and inserting connector.

[0030] As in Fig. As shown in Figure 5A, the main sealing body 2 includes an upper side section 2A, a lower side section 2B arranged on the opposite side of the upper side section 2A, a left side section 2C and a right side section 2B connecting the upper side section 2A and the lower side section 2B, and four corner sections connecting the upper side section 2A, the lower side section 2B, the left side section 2C and the right side section 2D.

[0031] The upper side section 2A, when viewed from the front, is defined by a curved surface that is convex upwards. The lower side section 2B is defined by a curved surface that is convex downwards. The left side section 2C is defined by a curved surface that is convex to the left. The right side section 2D is defined by a curved surface that is convex to the right. The four corner sections are each defined by a curved surface located between the upper side section 2A and the left side section 2C, between the left side section 2C and the lower side section 2B, between the lower side section 2B and the right side section 2D, and between the right side section 2D and the upper side section 2A, to create a smooth, continuous transition between these side sections.

[0032] In the manner described above, the main sealing body 2 is formed in a track-like shape (in athletic terms). That is, the main sealing body 2 is formed such that, in its natural state where no external force is applied, it has a non-circular shape with a linear distance from its center to its outer edge that is essentially the same in every position. Examples of a main sealing body 2 can be formed in an oval shape, a square shape, or a polygonal shape.

[0033] As in Fig. 5A and Fig. As shown in Figure 5B, the pair of insertion sections 3 integrally includes the ring insertion plate section 4 (ring section main body), a plurality of (four in this embodiment) rotation-limiting sections 5 (projection sections) projecting outwards from the insertion plate section 4, and a plurality of (two in this embodiment) positioning sections 6 projecting outwards from the insertion plate section 4.

[0034] As in Fig. 5A and Fig. As shown in Figure 5B, the insertion plate section 4 is arranged so that it extends in the axial direction of the main sealing body 2. The insertion plate section 4 is designed such that its thickness dimension, orthogonal to the axis, is essentially constant.

[0035] Each of the upper side section 2A and the lower side section 2B is provided with two rotation-limiting sections 5, as shown. These rotation-limiting sections 5 are arranged separately from each other in the direction of rotation of the insertion plate section 4.

[0036] As in Fig. As shown in Figure 5C, the respective rotation-limiting sections 5 are formed in an isosceles trapezoidal shape when viewed from the front. That is, the rotation-limiting section 5 is defined by a top surface 5A (top section) projecting outwards from an outer circumferential surface 40S (hereinafter referred to as the "sealing reference surface 40S") of the insert plate section 4, and extending substantially parallel to the sealing reference surface 40S, and a pair of side surfaces 5B, 5B', which are continuous with the sealing reference surface 40S, and each of the two upper ends of the top surface 5A.

[0037] For each of the rotation restriction sections 5, the top surface 5A and the pair of side surfaces 5B, a flat surface is formed as shown in Fig. 5C is shown. Furthermore, the rotation-limiting section 5 is configured such that an angle θ2 (hereinafter referred to as "angle C") between the top surface 5A and each of the outer side surfaces 5B is an acute angle, and an angle θ3 between the sealing reference surface 40S and each of the side surfaces 5B is an obtuse angle. That is, the rotation-limiting section 5 is configured such that a circumferential dimension L5 of the top surface 5A (for example, the circumferential dimension of the top section in the projection direction) is larger than a circumferential dimension L6 between the boundary locations P2 (base sections) of the sealing reference surface 40S and the side surfaces 5B.

[0038] As in Fig. As shown in Figure 5B, a projecting section 6 is provided on each of the left side section 2C and the right side section 2D. Each of the projecting sections 6 is formed in a rectangular shape, with its long side direction corresponding to the circumferential direction.

[0039] Next, an effect of the sealing arrangement structure described above will be discussed with regard to Fig. 6A and Fig. 6B explained.

[0040] As described above with reference to the conventional prior art, one consideration is that, since the seal is not formed in a circle in the mold, the water sealing performance of the seal may be reduced if the seal is subjected to a force in the rotational direction R and is displaced in the rotational direction R from the predetermined position. According to the present disclosure, as in Fig. 5A and Fig. As shown in Figure 6B, when the force in the rotational direction R is applied to the seal 1, the rotation-limiting section 5 (projecting section) rests against the inner surface 25B' in the rotational direction R of the limiting housing section 25 (limited section), so that the force F (specified in Fig. 6B) is applied to the rotation-limiting section 5 in the outward direction away from the insertion plate section 4 (ring section main body), thus preventing the rotation-limiting section 5 from being displaced from the limiting housing section 25. Consequently, even when the seal 1 is subjected to force in the rotational direction, the seal 1 can be prevented from being displaced from its predetermined position in the housing body 10A in the rotational direction R, thereby ensuring the watertight performance of the fitted section of the receiving and insertion connector.

[0041] The present invention is not limited to the embodiment described above and may include other provisions which solve the problem of the present invention, and modifications as described below are also included in the present invention.

[0042] In the embodiment described above, the insert plate section 4 of the seal 1 is received in the housing section main body 24, which has the outer circumferential surface 24A and the inner circumferential surface 24B, as shown in Fig. 4B shown. However, the present invention is not limited thereto. As shown in Fig. As shown in Figure 7, a housing section main body 24' can include an outer circumferential surface 24A' and an inner-outer continuous surface 24C' that is continuous with the outer circumferential surface 24A'. In this case, the inner circumferential surface 24B is omitted. Fig. Figure 7 is a front view showing a modified example of the sealing arrangement structure. Fig. 7 are the elements which have the same or comparable functions or purposes as the embodiment described above, designated using the same reference numerals to omit their explanation.

[0043] Furthermore, in the embodiment described above, each of the insertion sections 3 of the seal 1 includes the insertion plate section 4 and the plurality (in the example, four) rotation-limiting sections 5 (projecting sections), which project outwards from the insertion plate section 4. However, the present invention is not limited to this. The plurality of rotation-limiting sections 5 can be provided such that they project inwards from the insertion plate section 4. In this case, it is preferred that the respective rotation-limiting housing sections 25 are positioned inwards with respect to the insertion plate section 24.

[0044] Furthermore, in the embodiment described above, the confining housing section 25 is configured such that the circumferential dimension L4 between the boundary locations P1 of each of the inner surfaces 25B and the outer circumferential surface 24A of the housing section main body 24 is larger than the circumferential dimension L5 of the uppermost surface 5A of the seal 1 (L4 > L5). However, the present invention is not limited to this. The confining housing section 25 can be configured such that the circumferential dimension L4 between the boundary locations P1 of each of the inner surfaces 25B and the outer circumferential surface 24A of the housing section main body 24 is smaller than the circumferential dimension L1 of the uppermost surface 5A of the seal 1 (L4 < L5).In this case, the seal 5 can be arranged such that, when the axial force is applied to the seal 1, the corner sections C of the rotation-restriction section 5 of the seal 1 are captured at the demarcation points P1 from the respective inner surfaces 25B, 25B of the restriction housing section and the outer circumferential surface 24A of the housing section main body 24, in order to prevent the rotation-restriction section 5 of the seal 1 from being removed from the restriction housing section 25.

[0045] Furthermore, in the embodiment described above, each rotation-limiting section 5 is configured such that the angle C between the uppermost surface 5A and each of the side surfaces 5B is an acute angle. However, the present invention is not limited to this. As in Fig. As shown in Figure 8, each rotation-limiting section 5' of the seal 1' can have a curved surface 5C such that the boundaries between the top surface 5A and each side surface 5B are round. Fig. Figure 8 is a front view showing another modified example of the sealing arrangement structure. Fig. 8 are elements which have the same or comparable function or purpose as the embodiment described above, identified using the same reference numerals to omit their explanation.

[0046] Furthermore, in the embodiment described above, the sealing arrangement structure is incorporated into a connector for illustrative purposes. However, the present invention is not limited to this. The sealing arrangement structure can be applied to other elements that require reliable water sealing performance.

[0047] Preferred provisions and methods for incorporating the present invention are disclosed herein; however, the present invention is not limited to these. That is to say, although the present invention is shown in the drawings and explained with reference to a particular embodiment, the embodiment described above can be modified in various ways by a person skilled in the art with regard to its shape, material, number, and other details without departing from the scope of the technical idea and the object of the present invention. Therefore, the descriptions above, which provide limitations in shape, material, etc., are included for illustrative purposes to facilitate understanding of the present invention and are not intended to limit the present invention.Thus, the elements are described without any partial or complete limitation with regard to shape, material, and these are within the scope of the present invention. 1, 1' seal 4 Insert plate section (ring section main body) 5.5' Rotation restriction section (projecting section) 5A Top surface (topmost section) 10A Housing body (first element) 24A Outer orbital surface (reference surface) 25 Restriction Enclosure Section (Excluded Section) 25A parallel surface (first surface) 25B Inner surface (second surface) L5 Circumference dimension of the uppermost surface (circumference dimension of the uppermost section) L6 Circumference dimension between base parts P2 Boundary point between sealing reference surface and side surface (base part) θ1 Angle between outer orbital surface and inner surface (angle between reference surface and second surface)

Claims

[1] A sealing arrangement structure configured to position a ring seal (1) between a first element (10A) and a second element, comprising the first element (10A) and the ring seal (1), wherein the seal (1) comprises an annular section main body (4) extending in an axial direction of the seal (1) and a projecting section (5) projecting from the annular section main body (4) in an outward direction or inward direction, wherein the first element (10A) is provided with a recessed section (25) configured to accommodate the projecting section (5) and formed in a shape corresponding to the projecting section (5), wherein the projecting section (5) is designed such that a circumferential dimension (L5) of an upper section (5A) thereof in a projection direction is larger than a circumferential dimension (L6) between base parts (P2) thereof, wherein a circumferential dimension (L3) of the excluded section (25) on a rear side in the projection direction is larger than a circumferential dimension (L4) of the excluded section (25) on a front side in the projection direction, and the circumferential dimension (L4) of the excluded section (25) on a front face in the projection direction is larger than the circumferential dimension (L5) of the upper section (5A) of the projecting section (5) in the projection direction. [2] A sealing arrangement structure according to claim 1, wherein the projecting section (5) is formed in a trapezoidal shape. [3] A sealing arrangement structure according to claim 1 or 2, wherein the excluded section (25) comprises a first surface (25A) arranged to face the uppermost section (5A) of the projecting section (5), and a pair of second surfaces (25B) arranged between the first surface (25A) and a reference surface (24A) which can contact the ring section main body (4), and wherein the first element (10A) is configured such that an angle (θ1) between the reference surface (24A) and each of the second surfaces (25B) is an acute angle.

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