Sealing plug

Abstract

The present application provides a sealing plug for sealing a hole on a plate, the sealing plug comprising: a plug body, a sealing lip and a supporting lip. The plug body comprises an upper portion and a lower portion; the sealing lip is arranged around the plug body, and the sealing lip extends downward from the upper portion of the plug body and away from the central axis of the plug body; the supporting lip is arranged around the plug body, and the supporting lip extends upward from the lower portion of the plug body and away from the central axis of the plug body; wherein the plug body has a recessed portion recessed inward from the outer surface of the plug body, the recess extends around the plug body, and the opening of the recess is located above and close to the connection between the plug body and the supporting lip. The sealing plug provided by the present application can improve the noise of the use part and reduce the insertion force.

Description

Technical Field

[0001] The present application relates to a sealing plug, in particular to a sealing plug used for sealing a hole on a panel. Background Art

[0002] When manufacturing the body of a vehicle, multiple openings and holes are created on the panels of the body structure, which allow air and dust to easily enter. Therefore, sealing plugs are needed to seal these openings and holes to prevent dust or water from entering. Sealing plugs can be inserted into the openings and holes of the body parts and form a seal with the panels. Summary of the invention

[0003] In panels of vehicle body structures, there is a need for sealing plugs that are easy to install and convenient to close openings and holes in the panels of vehicle body structures.

[0004] The present application provides a sealing plug for sealing a hole on a plate, the sealing plug comprising: a plug body, a sealing lip and a supporting lip; the plug body comprising an upper part and a lower part; the sealing lip is arranged around the plug body, and the sealing lip extends from the upper part of the plug body downward and away from the central axis of the plug body; the supporting lip is arranged around the plug body, and the supporting lip extends from the lower part of the plug body upward and away from the central axis of the plug body; wherein the plug body has a recessed portion sunken inwardly from the outer surface of the plug body, the recess extends around the plug body, and the opening of the recess is located above and close to the connection between the plug body and the supporting lip.

[0005] In the sealing plug as described above, the upper surface of the supporting lip is connected to the lower edge of the opening of the recess.

[0006] In the sealing plug as described above, the recess is located above the connection between the supporting lip.

[0007] In the sealing plug as described above, the recess gradually narrows from the opening toward the bottom end of the recess.

[0008] As described above, the plug body comprises a solid columnar body, and the height of the columnar body ranges from 2 mm to 6 mm, and the diameter of the plug body ranges from 10 mm to 50 mm.

[0009] As the sealing plug described above, the plug body is made of nylon or TPE material.

[0010] The sealing plug as described above further comprises: a sealing member connected to the lower surface of the sealing lip, wherein the sealing member can melt when heated by a heat source and solidify when the heat source is removed.

[0011] The sealing plug as described above, wherein the support lip has at least two notches, and the at least two notches extend from the distal end of the support lip to the plug body;

[0012] The sealing plug further comprises at least two convex ribs, which are formed by protruding outward from the outer surface of the plug body and extending downward along the axial direction and passing through the at least two recesses respectively.

[0013] In the sealing plug as described above, the at least two ribs extend downward to the bottom of the plug body.

[0014] As described above in the sealing plug, the outer surfaces of the lower parts of the at least two convex ribs shrink inwards from top to bottom to form a guide part.

[0015] As described above, the sealing plug has a circular cross-section of the plug body, and the at least two ribs are configured to form an angle between the center lines of the at least two ribs and the diameter of the plug body passing through the center points of the at least two ribs on the cross-section of the sealing plug.

[0016] For the sealing plug as described above, the angle ranges from 0° to 75°.

[0017] The sealing plug provided in the present application is used for a hole on a vehicle panel. The sealing plug has a large axial height, which can reduce the noise inside the vehicle. In addition, the structural setting of the sealing plug in the present application makes the insertion force smaller when the sealing plug is inserted into the hole on the panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1A A three-dimensional diagram of the sealing plug in this application;

[0019] Figure 1B yes Figure 1A Another perspective view of the sealing plug;

[0020] Figure 2A yes Figure 1A A bottom view of the middle sealing plug;

[0021] Figure 2B yes Figure 2A A partial enlarged view of the middle G part;

[0022] Figure 3A yes Figure 2A A cross-sectional view of the sealing plug taken along line AA;

[0023] Figure 3B yes Figure 3A A partial enlarged view of the middle H section;

[0024] Figure 4A yes Figure 2AA cross-sectional view of the sealing plug taken along line BB;

[0025] Figure 4B yes Figure 4A A partial enlarged view of the middle K section;

[0026] Figure 5 is a perspective view of a sealing plug and a panel with a hole in the present application;

[0027] Fig. 6A It is a cross-sectional diagram of the sealing plug when it is about to enter the hole in the panel;

[0028] Figure 6B is a cross-sectional schematic diagram of a sealing plug resting against a hole in a panel;

[0029] Figure 6C It is a cross-sectional schematic diagram when the sealing plug is in the center hole of the panel. DETAILED DESCRIPTION

[0030] Various specific embodiments of the present application will be described below with reference to the accompanying drawings that form a part of this specification. It should be understood that although terms indicating directions, such as "front", "rear", "upper", "lower", "left", "right", etc., are used in this application to describe various example structural parts and elements of the present application, these terms are used here only for the purpose of convenience of description and are determined based on the example orientations shown in the accompanying drawings. Since the embodiments disclosed in the present application can be set in different directions, these terms indicating directions are only for illustration and should not be regarded as limitations.

[0031] Figure 1A This is a three-dimensional view of the sealing plug 100 in the present application viewed from bottom to top. Figure 1B This is a three-dimensional view of the sealing plug of the present application viewed from top to bottom. Figure 2A yes Figure 1A Bottom view of the middle sealing plug, Figure 2B yes Figure 2A A partial enlarged view of the middle G part; Figure 3A yes Figure 2A The sectional view of the sealing plug along the AA line, Figure 3B yes Figure 3A A partial enlarged view of the middle H section; Figure 4A yes Figure 2A The cross-sectional view of the sealing plug in FIG. 1 along the BB line. Figure 4B yes Figure 4A A partial enlarged view of part K in the middle.

[0032] like Figure 1A , Figure 1B , Figure 2A , Figure 2B , Figure 3A , Figure 3B, Figure 4A and 4B As shown, the sealing plug 100 is used to be inserted into the hole 502 on the panel 501 (see Figure 5 ) and seal the hole 502 on the panel (see Figure 5 ). The sealing plug 100 includes a sealing plug body 102 and a sealing member 181. According to one embodiment, the sealing plug body 102 is formed as a whole by an injection molding process, and the sealing member 181 is molded on the sealing plug body 102 by a secondary molding process. The sealing plug body 102 is made of a thermoplastic material (such as TPE, nylon) and has a certain elasticity; the sealing member 181 is made of hot melt adhesive, which can melt at a higher temperature and solidify at a lower temperature. The sealing plug body 102 includes a plug body 101, a supporting lip 121, and a sealing lip 131, wherein the supporting lip 121 and the sealing lip 131 are respectively connected to the plug body 101. When the sealing plug 100 is installed in the hole 502 on the panel 501 (see Figure 5 ), the supporting lip 121 and the sealing lip 131 are respectively located on both sides of the panel, and the supporting lip 121 and the sealing lip 131 can undergo a certain deformation.

[0033] like Figure 1A , Figure 1B , Figure 2A , Figure 2B , Figure 3A , Figure 3BAs shown, the plug body 101 is a solid body and has an upper surface 311 and a lower surface 312. The plug body 101 includes a columnar body 110 that is roughly cylindrical, and the columnar body 110 is a solid columnar body 110 between the upper surface 311 and the lower surface 312 of the plug body 101. The plug body 101 has a central axis 150. The plug body 101 includes an upper portion 330 and a lower portion 320. The upper portion 330 includes an upper edge 340 formed by extending upward and outward from the outer side of the upper surface 311 of the plug body 101, so that an upper space 350 is formed between the upper edge 340 and the upper surface 311 of the plug body 101, and the upper space 350 is used to facilitate the deformation of the sealing lip 131. The lower portion 320 includes a lower edge 341 formed by extending downward from the outer side of the lower surface 312 of the plug body 101, so that a lower space 351 is formed between the lower edge 341 and the lower surface 312 of the plug body 101. The outer surface of the lower portion of the lower edge 341 shrinks inward from top to bottom, so as to play a guiding role and guide the sealing plug 100 into the corresponding mounting hole. Among them, the outer diameter of the upper portion 330 is greater than the outer diameter of the lower portion 320. In this application, the height of the plug body 101 in the axial direction is defined as the spacing between the upper surface 311 and the lower surface 312, that is, the height of the columnar body 110. The diameter range of the plug body 101 is 10-50mm. The height range of the plug body 101 is 2mm-6mm. In one embodiment, the height range of the plug body 101 is 3mm-5mm. In another embodiment, the height range of the plug body 101 is 4mm-5mm. In another embodiment, the height of the plug body 101 is 4.5mm or 4.6mm. The upper portion 330 of the plug body 101 has a recess 317 that is recessed downward from the upper surface 311, and the center of the recess 317 coincides with the central axis 150 of the plug body 101. The recess 317 is used to accommodate burrs that may be generated during the molding process of the sealing plug 100, so as to prevent the burrs that may be generated during the molding process from being higher than the upper surface 311.

[0034] The sealing lip 131 has a sealing lip connection end 133 and a sealing end 134, wherein the sealing lip connection end 133 is connected to the upper edge 340 of the upper portion 330, the sealing lip 131 extends downward from the sealing lip connection end 133 and away from the central axis 150 of the plug body 101, and the sealing end 134 is located at the distal end of the sealing lip 131. A continuous and smooth transition is formed between the sealing lip connection end 133 and the upper edge 340 of the plug body 101. The connection between the sealing lip connection end 133 and the upper edge 340 of the plug body 101 is the highest point of the sealing plug 100.

[0035] The seal 181 is annular and made of hot melt adhesive and is molded on the lower surface 337 of the sealing end 134 of the sealing lip 131 through a secondary molding process. The sealing end 134 of the sealing lip 131 and the seal 181 together constitute a sealing portion 348. When the sealing plug 100 is installed on the panel, the seal 181 of the sealing lip 131 is in direct contact with the panel, while the sealing end 134 of the sealing lip 131 cannot be in direct contact with the panel. The thickness of the seal 181 gradually increases from top to bottom.

[0036] Or Figure 1A , Figure 1B , Figure 2A , Figure 2B , Figure 3A , Figure 3B As shown, the support lip 121 has a support lip connection end 123 and a support end 124, the support lip connection end 123 is connected to the outer side of the lower part 320 of the plug body 101, and the support lip 121 extends upward from the support lip connection end 123 and away from the central axis 150 of the plug body 101, and the support end 124 is located at the far end of the support lip 121. The outer diameter of the support end 124 is larger than the outer diameter of the hole 502 on the panel. The support lip 121 has four support lip recesses 140a, 140b, 140c, 140d, and the four support lip recesses 140a, 140b, 140c, 140d are evenly distributed in the circumferential direction, that is, the line connecting the centers of the support lip recesses 140a and 140c and the line connecting the centers of the support lip recesses 140b and 140d are perpendicular to each other. Four support lip notches 140a, 140b, 140c and 140d extend from the support lip connecting end 123 to the support end 124 and penetrate the support lip connecting end 123 and the support end 124, respectively, thereby dividing the support lip 121 into four support lip portions 121a, 121b, 121c, 121d.

[0037] The top of the support end 124 of the support lip connection end 123 is higher than the bottom of the sealing portion 148 of the sealing lip 131, so that when the sealing plug 100 is installed in the hole on the panel, the sealing end 134 of the sealing lip 131 and the support end 124 of the support lip connection end 123 respectively apply a retaining force to the panel from both sides of the panel, so that the sealing plug 100 can be firmly fixed in the hole of the panel. The outer diameter of the support end 124 of the support lip is smaller than the outer diameter of the sealing end 134 of the sealing lip 131.

[0038] The plug body 101 has a recess 305 that is recessed inward from the outer surface of the plug body 101 in the circumferential direction, and the recess 305 extends around the plug body 101 to form a ring. The recess 305 has an opening 316, and the connection between the upper end of the opening 316 and the outer surface of the plug body 101 forms an upper edge 361, and the connection between the lower end of the opening 316 and the outer surface of the plug body 101 forms a lower edge 362. The opening 316 is located above the connection 363 between the plug body 101 and the support lip connection end 123 and close to the connection 363 between the plug body 101 and the support lip. The lower edge 362 of the opening 316 is connected to the upper surface of the support lip 121 and forms a smooth transition. The recess 305 provides space for the support lip 121 to deform toward the plug body 101, so that the support lip 121 is more likely to deform. The recess 305 gradually narrows from the opening 316 to the bottom end 319 of the recess 305. In this embodiment, the lowest point of the recess 305 is flush with the connection 363 between the plug body 101 and the support lip. In other embodiments, the lowest point of the recess 305 extends downward, so as to be lower than the connection 363 between the plug body 101 and the support lip.

[0039] like Figure 1A-1B , Figure 2A-2B , Figure 3A-3B and- Figures 4A-4B As shown, four convex ribs 180 are provided on the outer side of the plug body 101 for cooperating with the holes on the panel so that the sealing plug 100 is not easy to shake relative to the panel.

[0040] Four ribs 180 are formed to protrude outward from the outer surface of the plug body 101 , and extend through the four supporting lip recesses 140 a , 140 b , 140 c and 140 d along the axial direction of the plug body 101 .

[0041] in Figure 4A The cross section shown just cuts through a pair of ribs 180. Figure 4A As shown, the outer surface of the lower part of each of the four ribs 180 shrinks inward from top to bottom to form a guide portion 415, and the lower edge of the guide portion 415 forms a continuous transition with the outer surface of the plug body 101, so that the guide portion 415 and the lower edge 341 are used together to guide the sealing plug 100 into the corresponding hole.

[0042] like Figure 2A-2B As shown, on the cross section of the sealing plug 100, the outer sides of the four ribs 180 are on the same circumference 201, and the diameter of the circumference 201 is roughly equal to the diameter of the hole on the panel, so that when the sealing plug 100 is inserted into the hole on the panel, the ribs 180 can abut against the inner side of the hole, making it difficult for the sealing plug 100 to shake relative to the panel.

[0043] In the cross section of the sealing plug 100, that is, in the radial cross section of the sealing plug 100, each rib 180 extends outwardly from the outer surface of the plug body 101, and each rib 180 has a center line 291, which is consistent with the extension direction of the corresponding rib 180 and is located in the middle of the rib 180. In some embodiments, the cross section of the rib 180 is symmetrical with respect to the center line 291. In other embodiments, the cross section of the rib 180 is irregularly shaped, and the center line 291 passes through the center of gravity of the cross section of the rib 180. In the cross section of the sealing plug 100, the intersection of the center line 291 and the outer surface of the plug body 101 is the center point 295 of the rib 180, and the center line 291 of the rib 180 and the diameter 292 of the plug body 101 passing through the center point 295 of the rib 180 form an angle α, and the range of the angle α is greater than or equal to 0° and less than or equal to 75°. In one embodiment, the range of the angle α is greater than or equal to 10° and less than or equal to 50°. In one embodiment, the angle α is in a range of greater than or equal to 15° and less than or equal to 30°. In one embodiment, the angle α is 25°. The inclination direction of each of the four ribs 180 relative to the diameter of the plug body 101 passing through the center point of the corresponding rib 180 is the same or different, as long as the outer sides of the four ribs 180 are on the same circumference 201. The ribs 180 are arranged obliquely relative to the diameter of the plug body 101 passing through the center point of the corresponding rib 180, so that the ribs 180 can be deformed inward to a certain extent when contacting the hole on the panel, making it easier for the sealing plug 100 to be inserted into the hole on the panel.

[0044] In other embodiments, the number of ribs 180 may be other, and the ribs 180 may extend in other directions on the radial cross section of the sealing plug 100, as long as the outer sides of the ribs 180 are on the same circumference.

[0045] Figure 5 is a three-dimensional diagram of a sealing plug and a panel with a hole in the present application. Figure 5As shown, a panel 501 has a circular hole 502, and a sealing plug 100 is used to seal the hole 502 on the panel to isolate the two sides of the panel. The diameter of the circular hole 502 ranges from 10 mm to 60 mm. The panel 501 has a first side 511 and a second side 512. The sealing plug will be inserted into the hole 502 from the first side 511, so that the supporting lip 121 of the sealing plug 100 is located below the second side 512 of the panel, and the sealing lip 131 of the sealing plug 100 is located above the first side 511 of the panel. Subsequently, a heat source (such as a heating device) is used to heat the sealing plug 100 so that the sealing member 181 is heated and melted. After the heat source is removed and the sealing plug 100 returns to normal temperature, the sealing member 181 solidifies, thereby bonding the sealing lip 131 to the first side 511 of the panel. The sealing plug 100 is connected to the panel 501 by hot-melting the sealing member 181. Since the melted sealing member 181 has good fluidity, it can fully fill the gap between the sealing lip 131 and the panel 501. Therefore, after the sealing member 181 is solidified, a good seal is formed between the sealing plug 100 and the first side 511 of the panel 501. In the present application, the method of connecting the sealing plug 100 to the panel 501 by hot-melting the sealing member 181 is a relatively reliable connection method. When the temperature is less than 150°C, the sealing plug 100 will not fall off the panel 501.

[0046] In one application of the present application, the panel 501 can be a sheet metal of a vehicle, such as a sheet metal on a vehicle chassis, and the sheet metal has some holes required in the processing or assembly process. According to different requirements, the number of holes may be between a few and dozens. In order to prevent dust and water from the outside from entering the interior of the vehicle body, these holes need to be sealed, and the sealing plug in the present application can be used to seal them. In the present application, the first side 511 of the panel 501 faces the interior space of the vehicle body, and the second side 512 of the panel 501 faces the outside of the vehicle body. The engine of the vehicle is arranged outside the second side 512, and some dust and water may be generated at the second side 512, and the engine and other equipment outside the second side 512 will generate some noise. After the sealing plug 100 is installed in place, the hot melt adhesive that is hot-melted and then solidified is filled between the sealing plug 100 and the first side 511 of the panel 501, so that not only dust and water enter the interior of the vehicle body, but also noise is not easy to enter the space inside the vehicle through the gap between the sealing plug 100 and the panel 501.

[0047] Fig. 6A This is a cross-sectional diagram of the sealing plug entering the hole in the panel. Figure 6B is a cross-sectional diagram of the sealing plug against the hole in the panel. Figure 6C It is a cross-sectional schematic diagram when the sealing plug is in the center hole of the panel. Figures 6A-6C The figure shows the change in relative position between the sealing plug 100 and the panel 501 during the installation of the sealing plug.

[0048] Figure 6A-6B FIG. 5 shows a process in which the sealing plug 100 is inserted into the hole 502, the sealing plug 100 enters the hole 502, and abuts against the edge of the hole 502. Fig. 6A and Figure 6B As shown, when the sealing plug 100 is required to seal the hole on the sealing panel, the plug body 101 of the sealing plug 100 is aligned with the hole 502 on the panel 501, and the outer diameter of the lower edge 341 of the plug body 101 is smaller than the inner diameter of the hole 502, so that the lower edge 341 can easily enter the hole 502. After the lower edge 341 enters the hole 502, the guide portion 415 of the rib 180 gradually enters the hole 502 from bottom to top. Then, the support lip 121 gradually enters the hole 502 from bottom to top. Since the support lip 121 extends upward and outward from the support lip connection end 123, the outer diameter of the support lip 121 gradually increases from bottom to top, and the outer diameter of the support end 124 of the support lip 121 is larger than the outer diameter of the hole 502, so the support lip 121 cannot directly and easily pass through the hole 502, and the outer side of the support lip 121 abuts against the inner edge 611 of the hole 502.

[0049] Figure 6B-6C FIG. 5 shows a process in which an external force is applied to force the sealing plug 100 to deform during the process of inserting the sealing plug 100 into the hole 502, thereby supporting the lip 121 to pass through the edge of the hole 502. Figure 6B-6C As shown, when the outer side of the support lip 121 abuts against the inner edge 611 of the hole 502, the outside world applies downward pressure to the sealing plug 100, and the support lip 121 is squeezed by the inner edge of the hole 502 to deform and bend inward, so that the outer diameter of the support end 124 of the support lip 121 is close to or smaller than the outer diameter of the hole 502, so that the sealing plug 100 can continue to move downward until the support lip 121 just completely passes through the hole 502, is no longer squeezed by the inner edge of the hole 502 and returns to a free state, and the outer diameter of the support end 124 of the support lip 121 is larger than the outer diameter of the hole 502. Therefore, the support end 124 of the support lip 121 abuts against the second side 512 of the panel 501. When the sealing plug 100 is moved downward by the external force, since the bottom of the sealing portion 148 of the sealing lip 131 is lower than the top of the supporting end of the supporting lip 121, the sealing portion 148 of the sealing lip 131 will contact the first side 511 of the panel 501 before the supporting lip 121 completely passes through the hole 502. Therefore, the pressure applied to the sealing plug 100 by the outside world not only forces the supporting lip 121 to deform, but also causes the sealing lip 131 to deform so that the sealing end 134 of the sealing lip 131 moves upward. In other words, the pressure applied to the sealing plug 100 by the outside world needs to overcome the elastic force generated by the deformation of the supporting lip 121 and the sealing lip 131 at the same time.

[0050] Figure 6C 1 is a schematic diagram of the position of the sealing plug 100 when it is inserted into the hole 502, and only the positional relationship between the sealing plug 100 and the panel 501 when it is not deformed is shown, so there is a certain overlap between the sealing plug 100 and the panel 501. In actual application, the overlapping portion 606 of the supporting lip 121 and the panel 501 in the figure will be located below the second side 512 of the panel 501 due to the deformation of the supporting lip 121, and the overlapping portion 605 of the sealing lip 131 and the panel 501 shown in the figure will be located above the first side 511 of the panel 501 due to the deformation of the sealing lip 131. At this time, the sealing plug 100 clamps the panel 501 between the supporting lip 121 and the sealing lip 131, and the supporting lip 121 and the sealing lip 131 of the sealing plug 100 generate elastic forces due to their respective deformations, respectively toward the first side 511 and the second side 512 of the panel 501, so that the sealing plug 100 is clamped and cannot move relative to the panel 501 in a direction perpendicular to the panel. There is a small gap between the outer side of the rib 180 and the inner side of the hole 502 or they are in contact with each other, so that the sealing plug 100 cannot move relative to the panel 501 in the horizontal direction or can only move within a small range.

[0051] exist Figure 6C In the position shown, the sealing plug 100 has closed the hole 502, so that the first side 511 and the second side 512 of the panel 501 cannot communicate. In order to further strengthen the seal, after the sealing plug 100 is installed in place, a heat source is applied near the sealing plug 100 to increase the temperature so that the sealing member 181 melts, and the molten sealing member 181 will flow to fill the gap between the supporting lip 121 and the panel 501. Then the heat source is removed, and the sealing member 181 is re-solidified, so that the supporting lip 121 is sealed with the panel 501 and the sealing plug 100 is fixedly connected to the panel 501.

[0052] When pressure is applied to the sealing plug 100 to make the support lip 121 enter the hole 502 on the panel and deform, the support lip 121 is squeezed by the inner edge 611 of the hole 502, and an inward pressure is applied to the plug body 101. The lower part 330 of the plug body 101 has a recess 305, and the recess 305 provides space for the support lip 121 to deform inwardly, so that the support lip 121 is easy to shrink inwardly. The provision of the recess 305 of the plug body 101 can reduce the insertion force of the sealing plug 100.

[0053] At the same time, when applying pressure to the sealing plug 100 to make the sealing plug enter the hole 502 on the panel, since the circumference of the outer side of the rib 180 is close to the inner diameter of the hole 502, the sealing plug 100 cannot be exactly centered relative to the hole 502 during the insertion process. When the rib 180 contacts the inner edge 611 of the hole 502, the rib 180 is easily slightly deformed inward due to the angle of the rib 180, making it easy for the sealing plug 100 to be inserted into the hole 502. The setting of the rib 180 can reduce the insertion force of the sealing plug 100.

[0054] In addition, when pressure is applied to the sealing plug 100 to insert the sealing plug 100 into the hole 502 on the panel, the sealing lip 131 will be deformed by the pressure of the panel 501. The upper surface 311 of the plug body 101 and the upper edge 340 of the plug body 101 form an upper space 350 to provide space for the deformation of the sealing lip 131, making it easier to deform the sealing lip 131, thereby reducing the insertion force of the sealing plug 100.

[0055] After many observations and experiments by the inventor, it was found that the noise inside the vehicle is related to the configuration of the sealing plug 100. The noise inside the vehicle comes from the engine and other equipment outside the chassis. The sheet metal of the chassis is made of metal material, and by having a good sound insulation coefficient, a thinner sheet metal (for example, more than 0.4 mm) can achieve a better sound insulation effect. The sealing plug 100 is made of thermoplastic materials such as nylon, and the sound insulation coefficient of these thermoplastic materials is lower than that of metal. The height of the plug body of the sealing plug 100 in the prior art is usually between 0.8mm-2mm, and its sound insulation ability is lower than that of the sheet metal. The noise generated during the operation of the vehicle may be transmitted to the interior of the vehicle through the sealing plug 100. The sealing plug 100 is connected to the vehicle sheet metal by hot melt adhesive, and already has a good sealing effect. Only improving the seal between the sealing plug and the vehicle panel or changing the shape of the sealing plug 100 cannot effectively reduce noise transmission. The applicant sets the height of the plug body 101 in the axial direction to be relatively thick, for example, between 4mm and 5mm, so that the plug body 101 can block the propagation of part of the noise, so that the sealing plug in the present application can effectively reduce the noise inside the vehicle and improve the user experience of the vehicle.

[0056] Although only some features of the present application have been illustrated and described herein, various modifications and changes may be made to those skilled in the art. Therefore, it should be understood that the appended claims are intended to cover all the above modifications and changes that fall within the spirit and scope of the present application.

Claims

1. A sealing plug for sealing a hole in a plate, characterized in that The sealing plug comprises: A plug body (101), the plug body comprising an upper portion (330) and a lower portion (320), the plug body (101) comprising a solid columnar body (110); a sealing lip (131), the sealing lip (131) being arranged around the plug body (101), the sealing lip (131) extending downward from the upper portion (330) of the plug body (101) and away from the central axis of the plug body (101); a supporting lip (121), the supporting lip (121) being arranged around the solid columnar body (110), the supporting lip (121) extending upward from the lower portion (320) of the plug body (101) and away from the central axis of the plug body (101); The plug body (101) has a recess (305) extending from the circumferential outer surface of the solid columnar body (110) of the plug body (101) toward the interior of the solid columnar body (110), and the recess (305) extends around the solid columnar body (110). The opening (316) of the recess (305) is located above the connection (363) between the plug body (101) and the support lip and close to the connection (363) between the plug body (101) and the support lip (121).

2. The sealing plug according to claim 1, characterized in that: The upper surface of the support lip (121) is connected to the lower edge of the opening (316) of the recess (305).

3. The sealing plug according to claim 1, characterized in that: The recess (305) is located above the connection (363) of the support lip.

4. The sealing plug according to claim 1, characterized in that: The recess (305) gradually narrows from the opening (316) toward the bottom end of the recess (305).

5. The sealing plug according to claim 1, characterized in that: The height of the solid columnar body (110) ranges from 2 mm to 6 mm, and the diameter of the plug body (101) ranges from 10 mm to 50 mm.

6. The sealing plug according to claim 5, characterized in that: The plug body (101) is made of nylon or TPE material.

7. The sealing plug according to claim 5, characterized in that The sealing plug also includes: A sealing member (181) is connected to the lower surface of the sealing lip (131), and the sealing member (181) can melt when heated by a heat source and solidify when the heat source is removed.

8. The sealing plug according to claim 1, characterized in that: The supporting lip (121) has at least two notches, and the at least two notches extend from the distal end of the supporting lip (121) to the plug body (101); The sealing plug further comprises at least two convex ribs (180), the at least two convex ribs (180) being formed to protrude outwardly from the outer surface of the plug body (101) and extending downwardly along the axial direction and passing through the at least two recesses respectively.

9. The sealing plug according to claim 8, characterized in that: The at least two convex ribs (180) extend downward to the bottom of the plug body (101).

10. The sealing plug according to claim 9, characterized in that: The outer surfaces of the lower parts of the at least two convex ribs (180) shrink inwards from top to bottom to form a guide part.

11. The sealing plug according to claim 8, characterized in that: The cross section of the plug body (101) is circular, and the at least two convex ribs (180) are configured such that, on the cross section of the sealing plug, an angle is formed between a center line of the at least two convex ribs (180) and a diameter of the plug body (101) passing through a center point of the at least two convex ribs (180).

12. The sealing plug according to claim 11, characterized in that: The angle ranges from 0° to 75°.

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