Sealing rubber ring, sealing plug and connecting module

Abstract

The utility model belongs to the field of connector sealing, and particularly relates to a sealing rubber ring, a sealing plug and a connecting module. The sealing rubber ring is used for solving the technical problems that when a rectangular sealing rubber ring on an existing sealing plug is installed on a module shell, the rectangular sealing rubber ring is greatly influenced by friction resistance, installation is not easy, and local accumulation is prone to occurring. The sealing plug is used for solving the technical problems that when an existing sealing plug is installed on a module shell, the sealing plug is greatly influenced by frictional resistance, installation is not easy, and local accumulation of a sealing rubber ring is prone to occurring. The connecting module is used for solving the technical problems that an existing connecting module is not easy to install and poor in sealing performance. The sealing rubber ring comprises an annular body, the annular body comprises a lower side section and an upper side section, and side edge sections are connected between the ends of the two sides of the upper side section and the ends of the two sides of the lower side section. The length of the upper side section along the width direction of the notch of the plug mounting groove is greater than that of the lower side section along the width direction of the notch of the plug mounting groove, and at least one side section is arc-shaped or oblique-line-shaped.

Description

Technical Field

[0001] The utility model belongs to the field of connector sealing, and specifically relates to a sealing rubber ring, a sealing plug and a connection module. Background Art

[0002] The connection module is a plug-and-play information equipment expansion tool. The existing connection module usually includes a module housing and a sealing plug that can be detachably mounted on the module housing. The PCB board and related electrical components are installed in the module housing and are conductively connected to the sealing plug. The sealing plug is usually provided with a sealing rubber ring at the position where the outer peripheral surface of the plug housing and the module housing meet to achieve the sealing of the connection between the sealing plug and the module housing. The PCB board is usually welded to the sealing plug as a whole before being installed on the module housing. In order to facilitate installation, the module housing adopts a split design correspondingly, specifically including a module base and a module gland. The module base is a cubic box structure with one side open, and a plug installation groove for installing the sealing plug is provided on one side of the cubic box structure, which is opened in the same direction as the cubic box structure. The sealing rubber ring is pre-set on the outer periphery of the sealing plug, and is inserted into the plug installation groove from the opening of the plug installation groove together with the sealing plug, until the sealing rubber ring is completely blocked between the sealing plug and the bottom and wall of the plug installation groove. After being installed in place, the module gland is fixedly installed at the opening of the module base to form a complete module housing structure, and the module gland is pressed against the corresponding side of the corresponding sealing ring to achieve sealing between the sealing ring and the module gland.

[0003] In order to ensure the sealing effect, the sealing rubber ring should be in a compressed state after being installed in place. Therefore, the outer dimensions of the sealing rubber ring installed on the sealing plug before installation must be larger than the slot width of the plug mounting groove. During installation, the sealing plug and the sealing rubber ring are inserted into the plug mounting groove by forced installation to achieve the sealing effect. However, the existing sealing rubber ring installed on the sealing plug is usually a rectangular rubber ring, and the plug mounting groove is a rectangular mounting groove adapted to the rectangular rubber ring. During installation, due to the elastic extrusion force of the sealing rubber ring, there is a large friction resistance between the sealing rubber ring and the groove wall of the plug mounting groove, making it difficult for the sealing rubber ring and the sealing plug to be installed into the plug mounting groove. Moreover, during the forced installation process, the sealing rubber ring may be stretched and deformed due to the friction resistance, resulting in the phenomenon of local accumulation of the rubber ring at the opening of the plug mounting groove corresponding to the sealing rubber ring. This will cause the sealing effect at this location to deteriorate or even lose the sealing performance. Utility Model Content

[0004] The purpose of the utility model is to provide a sealing rubber ring to solve the technical problem that the rectangular sealing rubber ring on the existing sealing plug is greatly affected by friction resistance when installed on the module housing, is difficult to install and is prone to local accumulation. The purpose of the utility model is to provide a sealing plug to solve the technical problem that the existing sealing plug is greatly affected by friction resistance when installed on the module housing, is difficult to install and is prone to local accumulation of the sealing rubber ring. The purpose of the utility model is to provide a connection module to solve the technical problem that the existing connection module is difficult to install and has poor sealing performance.

[0005] The utility model adopts the following technical solutions:

[0006] A sealing rubber ring comprises an annular body, wherein the annular body comprises a lower section for sealing against the bottom of a plug mounting groove of a module housing and an upper section for sealing against a module top cover of the module housing, and side sections are connected between both side ends of the upper section and the lower section; the length of the upper section along the slot width direction of the plug mounting groove is greater than the length of the lower section along the slot width direction of the plug mounting groove, and at least one side section is arc-shaped or oblique.

[0007] Furthermore, the contour shape of the sealing rubber ring is an isosceles trapezoid.

[0008] Furthermore, the annular body includes a pair of annular side walls that are arranged relatively spaced apart and a connecting wall that is connected between the annular side walls and faces outward.

[0009] Furthermore, an annular boss is provided on the outward side of the annular side wall.

[0010] Furthermore, the included angle between the arc-shaped or oblique-line side segment and the lower side segment is greater than or equal to 93 degrees and less than or equal to 100 degrees.

[0011] Furthermore, an anti-foolproof notch is provided on the annular boss.

[0012] Beneficial effects: The utility model improves the existing sealing rubber ring used for sealing plugs. The sealing rubber ring of the utility model includes an annular body, which includes a lower side section for sealing against the bottom of the plug installation groove of the module housing and an upper side section for sealing against the module top cover of the module housing, and side sections are connected between the ends of the upper side section and the lower side section. Compared with the existing sealing rubber ring, the key of the utility model is that the length of the upper side section along the width direction of the plug installation groove is greater than the length of the lower side section along the width direction of the plug installation groove, and at least one side section is arc-shaped or oblique. Such an arrangement can make the plug installation groove that seals with the sealing rubber ring also be designed to have an opening width dimension greater than the groove bottom width dimension, and at least one side of the groove wall is an inclined straight wall or arc-shaped wall. When inserting the sealing plug, since the lower side section is used to seal against the bottom of the plug installation groove of the module housing, the lower side section needs to be first inserted into the plug installation groove. Before the lower side section is inserted into place, since the length of the lower side section along the width direction of the plug installation slot is less than the width of the plug installation slot, the side sections on both sides of the upper side section and the lower side section will not be subject to large friction resistance. This reduces the difficulty of installing the sealing plug on the one hand, and avoids the local accumulation of the rubber ring caused by large friction resistance on the other hand, thereby ensuring the sealing integrity and reliability between the sealing plug and the module housing.

[0013] A sealing plug comprises a plug housing and a sealing rubber ring, wherein a rubber ring mounting groove for mounting the sealing rubber ring is arranged on the plug housing, the contour of the rubber ring mounting groove matches the contour shape of the sealing rubber ring, and the sealing rubber ring comprises an annular main body, wherein the annular main body comprises a lower side section for tightly sealing with the bottom of the plug mounting groove of the module housing and an upper side section for tightly sealing with the module top cover of the module housing, and side sections are connected between both side ends of the upper side section and the lower side section; the length of the upper side section along the slot width direction of the plug mounting groove is greater than the length of the lower side section along the slot width direction of the plug mounting groove, and at least one side section is arc-shaped or oblique.

[0014] Furthermore, the contour shape of the sealing rubber ring is an isosceles trapezoid.

[0015] Furthermore, the annular body includes a pair of annular side walls that are arranged relatively spaced apart and a connecting wall that is connected between the annular side walls and faces outward.

[0016] Furthermore, an annular boss is provided on the outward side of the annular side wall.

[0017] Furthermore, the included angle between the arc-shaped or oblique-line side segment and the lower side segment is greater than or equal to 93 degrees and less than or equal to 100 degrees.

[0018] Furthermore, an anti-foolproof notch is provided on the annular boss.

[0019] Beneficial effects: The utility model improves the sealing plug on the existing connection module. The sealing plug of the utility model includes a plug housing and a sealing rubber ring. The plug housing is provided with a rubber ring installation groove for fitting the sealing rubber ring, and the contour of the rubber ring installation groove is adapted to the contour shape of the sealing rubber ring. Compared with the prior art, the key of the utility model is that the sealing rubber ring includes an annular body, and the annular body includes a lower side section for sealing against the bottom of the plug installation groove of the module housing and an upper side section for sealing against the module top cover of the module housing, and side sections are connected between the ends of the upper side section and the lower side section. The length of the upper side section along the width direction of the plug installation groove is greater than the length of the lower side section along the width direction of the plug installation groove, and at least one side section is arc-shaped or oblique. Such an arrangement can make the plug installation groove that cooperates with the sealing rubber ring seal also correspondingly designed to have an opening width dimension greater than the groove bottom width dimension, and at least one side of the groove wall is an inclined straight wall or arc-shaped wall groove type. When inserting the sealing plug, the lower side section is used to seal against the bottom of the plug installation slot of the module housing, so the lower side section needs to be inserted into the plug installation slot first. Before the lower side section is inserted into place, since the length of the lower side section along the width direction of the plug installation slot is less than the width of the plug installation slot, the side sections on both sides of the upper side section and the lower side section will not be subject to large friction resistance. This reduces the difficulty of installing the sealing plug on the one hand; on the other hand, it also avoids the local accumulation of rubber rings caused by large friction resistance, thereby ensuring the sealing integrity and reliability between the sealing plug and the module housing.

[0020] A connection module comprises a module shell and a sealing plug installed on the module shell, the module shell is provided with a plug installation groove for installing the sealing plug, the sealing plug comprises a plug shell and a sealing rubber ring, the plug shell is provided with a rubber ring installation groove for fitting the sealing rubber ring, the contours of the rubber ring installation groove and the plug installation groove are adapted to the contour shape of the sealing rubber ring, the sealing rubber ring comprises an annular body, the annular body comprises a lower side section for tightly sealing with the bottom of the plug installation groove of the module shell and an upper side section for tightly sealing with the module top cover of the module shell, side sections are connected between both side ends of the upper side section and the lower side section; the length of the upper side section along the slot width direction of the plug installation groove is greater than the length of the lower side section along the slot width direction of the plug installation groove, and at least one side section is arc-shaped or oblique.

[0021] Furthermore, the contour shape of the sealing rubber ring is an isosceles trapezoid.

[0022] Furthermore, the annular body includes a pair of annular side walls that are arranged relatively spaced apart and a connecting wall that is connected between the annular side walls and faces outward.

[0023] Furthermore, an annular boss is provided on the outward side of the annular side wall.

[0024] Furthermore, the included angle between the arc-shaped or oblique-line side segment and the lower side segment is greater than or equal to 93 degrees and less than or equal to 100 degrees.

[0025] Furthermore, an anti-foolproof notch is provided on the annular boss.

[0026] Beneficial effects: The utility model improves the existing connection module. The connection module described in the utility model includes a module housing and a sealing plug installed on the module housing, and the module housing is provided with a plug installation groove for installing the sealing plug. The sealing plug includes a plug housing and a sealing rubber ring, and the plug housing is provided with a rubber ring installation groove for fitting the sealing rubber ring, and the contour of the rubber ring installation groove is adapted to the contour shape of the sealing rubber ring. Compared with the prior art, the key of the utility model is that the sealing rubber ring includes an annular body, and the annular body includes a lower side section for sealing against the bottom of the plug installation groove of the module housing and an upper side section for sealing against the module top cover of the module housing, and side sections are connected between the two side ends of the upper side section and the lower side section. The length of the upper side section along the width direction of the plug installation groove is greater than the length of the lower side section along the width direction of the plug installation groove, and at least one side section is arc-shaped or oblique. Such an arrangement can make the plug installation groove that is sealed with the sealing rubber ring also be correspondingly designed to have an opening width dimension larger than the groove bottom width dimension, and at least one side of the groove wall is an inclined straight wall or an arc-shaped wall. When inserting the sealing plug, since the lower side section is used to seal against the groove bottom of the plug installation groove of the module housing, the lower side section needs to be inserted into the plug installation groove first. Before the lower side section is inserted into place, since the length of the lower side section along the groove width direction of the plug installation groove is less than the groove width of the plug installation groove, the side sections on both sides of the upper side section and the lower side section will not be subject to large friction resistance. This reduces the difficulty of installing the sealing plug on the one hand; on the other hand, it also avoids the situation of local accumulation of rubber rings caused by large friction resistance, thereby ensuring the sealing integrity and reliability between the sealing plug and the module housing. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is an off-axis view of an embodiment of the connection module of the utility model;

[0028] Figure 2 for Figure 1 An off-axis view in another direction (without the module cover);

[0029] Figure 3 for Figure 1 Exploded view of;

[0030] Figure 4 for Figure 1 Top view of the module (without the module cover);

[0031] Figure 5 for Figure 1 A front view of the module housing;

[0032] Figure 6 for Figure 5 Exploded view from the main view perspective;

[0033] Figure 7 for Figure 5 Exploded view from off-axis perspective;

[0034] Figure 8 for Figure 1 An exploded view of the sealing plug;

[0035] Fig. 9 A cross-sectional view of a plug housing of a sealing plug along a center plane of a groove width direction of a trapezoidal groove;

[0036] Fig.10 A solid cross-sectional view of the plug housing cut along the center plane in the width direction

[0037] Fig.11 This is a schematic diagram of the installation of the sealing plug onto the module housing;

[0038] Fig.12 for Figure 8 The front view of the middle sealing rubber ring;

[0039] Fig.13 for Fig.11 Schematic diagram of the cross section along AA;

[0040] The names of the components corresponding to the corresponding reference numerals in the figure are: 1. module housing; 2. sealing plug; 3. module base; 4. module cover; 5. plug mounting groove; 6. plug housing; 7. plug body; 8. rubber ring mounting groove; 9. sealing rubber ring; 10. annular body; 11. upper side section; 12. lower side section; 13. side section; 14. annular side wall; 15. connecting wall; 16. annular boss; 17. anti-foolproof notch; 18. convex edge; 19. sealing gasket mounting groove; 20. sealing gasket. DETAILED DESCRIPTION

[0041] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0042] The scheme principle of the connection module of the utility model is as follows:

[0043] A connection module includes a module housing and a sealing plug mounted on the module housing. The module housing is provided with a plug mounting groove so that the sealing plug can be sealed and mounted on the module housing. The sealing plug includes a plug housing, and the plug housing is provided with a rubber ring mounting groove for fitting a sealing rubber ring, the rubber ring mounting groove is fitted with a sealing rubber ring, and the contour of the rubber ring mounting groove is adapted to the contour shape of the sealing rubber ring.

[0044] Compared with the prior art, the key of the utility model is that the sealing rubber ring includes an annular body, the annular body includes a lower side section for sealing against the bottom of the plug installation groove of the module housing and an upper side section for sealing against the module top cover of the module housing, and side sections are connected between the ends of both sides of the upper side section and the lower side section. The length of the upper side section along the width direction of the plug installation groove is greater than the length of the lower side section along the width direction of the plug installation groove, and at least one side section is arc-shaped or oblique. Such an arrangement can make the plug installation groove that cooperates with the sealing rubber ring to be correspondingly designed to have an opening width dimension greater than the groove bottom width dimension, and at least one side of the groove wall is an inclined straight wall or an arc-shaped wall.

[0045] When inserting the sealing plug, the lower side section is used to seal against the bottom of the plug installation slot of the module housing, so the lower side section needs to be inserted into the plug installation slot first. Before the lower side section is inserted into place, since the length of the lower side section along the width direction of the plug installation slot is less than the width of the plug installation slot, the side sections on both sides of the upper side section and the lower side section will not be subject to large friction resistance. This reduces the difficulty of installing the sealing plug on the one hand; on the other hand, it also avoids the local accumulation of rubber rings caused by large friction resistance, thereby ensuring the sealing integrity and reliability between the sealing plug and the module housing.

[0046] Embodiments of the connection module of the utility model:

[0047] A connection module, the structure of which can refer to Figure 1-4 As shown, it includes a module housing 1 and a sealing plug 2 installed on the module housing 1. The structure of the module housing 1 can be referred to Figure 5-7 As shown, it is specifically a top-bottom split structure, including a module base 3 and a module gland 4. In this embodiment, the module base 3 is a cubic box-type structure with an upper side opening, and a plug installation groove 5 for installing the sealing plug 2, which is open upward, is provided on a side box wall adjacent to the upper side, so that the sealing plug 2 is sealed and installed on the module housing 1.

[0048] The structure of the sealing plug 2 can be referred to Figure 8 As shown, it includes a plug housing 6 and a plug body 7 installed in the plug housing 6. The structure of the plug body 7 is an existing structure, so it is not described in detail here. The structure of the plug housing 6 can be referred to Fig. 9 , Fig.10 As shown, a rubber ring installation groove 8 for inserting a sealing rubber ring 9 is provided thereon, a sealing rubber ring 9 is inserted into the rubber ring installation groove 8, and the contour of the rubber ring installation groove 8 is adapted to the contour shape of the sealing rubber ring 9 to ensure that the sealing rubber ring 9 and the rubber ring installation groove 8 can fit tightly. Fig.11 After the sealing plug 2 is installed on the module housing 1, the rubber ring installation groove 8 and the sealing rubber ring 9 are just located in the plug installation groove 5. The shape of the plug installation groove 5 is adapted to the rubber ring installation groove 8 and the sealing rubber ring 9 to ensure that the sealing rubber ring 9 and the plug installation groove 5 can fit tightly to ensure the sealing effect.

[0049] For reference Fig.12 As shown, the sealing rubber ring 9 includes an annular body 10, and the annular body 10 includes a lower side section 12 for tightly sealing with the bottom of the plug installation groove 5 of the module housing 1 and an upper side section 11 for tightly sealing with the module top cover of the module housing 1. The upper side section 11 and the lower side section 12 are respectively connected with side sections 13 at both ends to form a complete annular structure. The length of the upper side section 11 along the slot width direction of the plug installation groove 5 is greater than the length of the lower side section 12 along the slot width direction of the plug installation groove 5, and at least one side section 13 is arc-shaped or oblique line-shaped to reduce the friction resistance between the sealing rubber ring 9 and the plug installation groove 5 when the sealing plug 2 is inserted.

[0050] During installation, the sealing rubber ring 9 is bundled on the rubber ring installation groove 8 of the plug housing 6, and then the sealing plug 2 is inserted into the plug installation groove 5 as a whole. During insertion, the lower side section 12 of the sealing rubber ring 9 faces the bottom of the plug installation groove 5. After the sealing plug 2 is inserted into place, the module gland 4 is installed on the module base 3, and then the sealing plug 2 and the module housing 1, the module housing 1 and the module gland 4 are fastened and connected as a whole with fasteners. In order to ensure the sealing between the module base 3 and the module gland 4, a convex edge 18 extending into the module base 3 can be provided at the opening of the module base 3 facing the module gland 4, and a sealing gasket installation groove 19 is provided on the convex edge 18. A sealing gasket 20 is installed in the sealing gasket installation groove 19 to achieve the sealing between the module base 3 and the module gland 4. In order to prevent the convex edge 18 and the sealing gasket 20 from interfering with the installation of the sealing plug 2, the convex edge 18 and the sealing gasket 20 are cut off at the notch of the plug installation groove 5. After the sealing plug 2 is installed in place, the end of the sealing gasket 20 formed by truncation abuts against the sealing rubber ring 9 of the sealing plug 2 to ensure the sealing performance on the connection module as much as possible.

[0051] The key point of this embodiment is that the contour of the sealing rubber ring 9 is an isosceles trapezoid, wherein the upper side section 11 constitutes the long side of the isosceles trapezoid, the lower side section 12 constitutes the short side of the isosceles trapezoid, the center point of the upper side section 11 and the center point of the lower side section 12 are distributed on the same vertical vertical line; the side section 13 constitutes two waist sides of the isosceles trapezoid. Such a setting, on the one hand, reduces the friction resistance when the sealing plug 2 is inserted into the plug installation groove 5 as much as possible, reduces the difficulty of installing the sealing plug 2, and also avoids the situation of local accumulation of the rubber ring caused by large friction resistance. On the other hand, such a setting makes the sealing plug 2 and the module housing 1 as much as possible in a straight edge matching manner, which makes it easier to ensure the sealing effect, and also reduces the difficulty and cost of processing and forming the module housing 1 and the plug housing 6. In addition, such a setting is easy to process, and it is also easy to insert the sealing plug 2 into the plug installation groove 5 in a center-to-center manner as much as possible during installation. In this way, it can prevent the sealing plug 2 from being offset and tightly attached to one side of the groove wall of the plug installation groove 5 during installation, thereby reducing the friction resistance between the sealing plug 2 and the groove wall of the plug installation groove 5. Of course, the contour of the sealing rubber ring 9 can also be a right-angled trapezoid, that is, the upper side section 11 and the lower side section 12 are aligned at one end and arranged in parallel, so that one of the aforementioned side sections 13 can be kept perpendicular to both the upper side section 11 and the lower side section 12, and the side section 13 on the other side is arranged obliquely. Or the contour of the sealing rubber ring 9 can also be an arc shape, that is, the upper side and the lower side are arranged relatively parallel, one of the side sections 13 between the two ends of the upper side and the lower side is an arc edge, or the side sections 13 between the two ends of the upper side and the lower side are all arc edges.

[0052] For reference Fig.13 As shown, the annular body 10 includes a pair of annular side walls 14 arranged relatively spaced apart and a connecting wall 15 connected to the annular side walls 14 on the outward side, that is, the cross-sectional shape of the annular body 10 is a U-shaped shape with the opening facing the annular center of the annular body 10. Most of the existing sealing rubber rings 9 are solid structures with limited compression and can only be installed in installation positions of specific sizes. The above-mentioned arrangement can increase the compressibility of the sealing rubber ring 9 while maintaining its sealing ability, so that it can be applied to a wider range of installation spaces. Of course, the annular body 10 can also adopt a solid structure, in which case the cross-section of the annular body 10 can be a conventional geometric shape such as a circle, a rectangle, or a triangle.

[0053] On this basis, an annular boss 16 can be provided on the outward side of the annular side wall 14 located on the outer side of the connection module. After the sealing rubber ring 9 is installed in the rubber ring installation groove 8, the annular boss 16 can press against the corresponding groove wall of the rubber ring installation groove 8 to prevent the sealing rubber ring 9 from moving in the rubber ring installation groove 8. At the same time, the provision of the annular boss 16 also facilitates the positioning of the sealing rubber ring 9 in the rubber ring installation groove 8 along the groove width direction of the rubber ring installation groove 8, so that the sealing rubber ring 9 can be completely aligned with the groove bottom of the plug installation groove 5 when the sealing plug 2 is inserted into the plug installation groove 5, so as to avoid the influence of the misalignment of the sealing rubber ring 9 on the seal between the sealing plug 2 and the plug installation groove 5 as much as possible.

[0054] The angle between the arc-shaped or oblique side section 13 and the lower side section 12 is preferably maintained within a range of less than or equal to 100 degrees and greater than or equal to 93 degrees. This can reduce the corresponding volume of the plug housing 6 as much as possible, thereby reducing the occupied space of the entire sealing plug 2 and further facilitating the miniaturization of the connection module.

[0055] An anti-mistake notch 17 may also be provided on the annular boss 16. Since the sealing rubber ring 9 is generally flexible and easily deformed, before it is actually installed on the plug housing 6 of the sealing plug 2, the sealing rubber ring 9 is actually an irregular flexible shape. If the length of the upper section 11 and the lower section 12 of the sealing rubber ring 9 are relatively close, it is very easy for the installer to install the upper section 11 and the lower section 12 in reverse during the installation process. This will cause the lower section 12 to be tightened and the upper section 11 to become loose, which will affect both the installation of the sealing plug 2 and the sealing performance between the sealing plug 2 and the module housing 1. In severe cases, the sealing rubber ring 9 may even be broken during installation. The anti-mistake notch 17 can effectively ensure that the sealing rubber ring 9 is installed on the plug housing 6 of the sealing plug 2 in the correct manner, and minimize the probability of incorrect installation of the sealing rubber ring 9.

[0056] Embodiments of the sealing plug of the utility model:

[0057] The embodiment of the sealing plug of the present invention is consistent with the scheme principle of the connection module of the present invention and the sealing plug 2 described in the embodiment, and will not be described in detail here.

[0058] Embodiments of the sealing rubber ring of the utility model:

[0059] The embodiment of the sealing rubber ring of the present invention is consistent with the scheme principle of the connection module of the present invention and the sealing rubber ring 9 described in the embodiment, and will not be described in detail here.

[0060] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The patent protection scope of the present invention shall be based on the claims. All equivalent structural changes made using the description and drawings of the present invention shall be included in the protection scope of the present invention.

Claims

1. A sealing rubber ring, comprising an annular body (10), the annular body (10) comprising a lower side section (12) for tightly sealing against the bottom of a plug mounting groove (5) of a module housing (1) and an upper side section (11) for tightly sealing against a module top cover of the module housing (1), side sections (13) being connected between both side ends of the upper side section (11) and the lower side section (12); characterized in that: The length of the upper side section (11) along the slot width direction of the plug mounting slot (5) is greater than the length of the lower side section (12) along the slot width direction of the plug mounting slot (5), and at least one side section (13) is arc-shaped or oblique-line-shaped.

2. The sealing rubber ring according to claim 1, characterized in that: The outline shape of the sealing rubber ring is an isosceles trapezoid.

3. The sealing rubber ring according to any one of claims 1 or 2, characterized in that: The annular body (10) comprises a pair of annular side walls (14) arranged relatively at intervals and a connecting wall (15) connected between the annular side walls (14) and facing outwards.

4. The sealing rubber ring according to claim 3, characterized in that: An annular boss (16) is provided on the outward side of the annular side wall (14).

5. The sealing rubber ring according to claim 4, characterized in that: The included angle between the arc-shaped or oblique-line side section (13) and the lower side section (12) is greater than or equal to 93 degrees and less than or equal to 100 degrees.

6. The sealing rubber ring according to claim 5, characterized in that: The annular boss (16) is provided with an anti-fouling notch (17).

7. A sealing plug, comprising a plug housing (6) and a sealing rubber ring (9), wherein the plug housing (6) is provided with a rubber ring installation groove (8) for inserting the sealing rubber ring (9), wherein the contour of the rubber ring installation groove (8) is adapted to the contour shape of the sealing rubber ring (9), and wherein: The sealing rubber ring (9) is the sealing rubber ring (9) according to any one of claims 1 to 6.

8. A connection module, comprising a module housing (1) and a sealing plug (2) mounted on the module housing (1), wherein the module housing (1) is provided with a plug mounting groove (5) for mounting the sealing plug (2), characterized in that: The sealing plug (2) comprises a plug housing (6) and a sealing rubber ring (9); the plug housing (6) is provided with a rubber ring mounting groove (8) for mounting the sealing rubber ring (9); the contours of the rubber ring mounting groove (8) and the plug mounting groove (5) are adapted to the contour shape of the sealing rubber ring (9); the sealing rubber ring (9) is the sealing rubber ring (9) according to any one of claims 1 to 6.

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