Automotive weather strips

Abstract

To provide a weather strip for an automobile which can suppress permeation / invasion of noise from the inside of a mounting base section to an in-vehicle side by bringing a tip of a holding lip into elastic contact with an in-vehicle side inside surface of a flange section in a close adhesion state through a notch section.SOLUTION: A weather strip includes: a mounting base section 22 which is mounted in a flange section 2 made by overlapping a plurality of metal panels formed along a door opening edge of a vehicle body and has a vehicle inside side wall 23, a vehicle outside side wall 24, and a connection wall 25 for connecting both of the side walls; a hollow seal section 26 which is provided integrally with an external surface of the mounting base section and is brought into elastic contact with a door; and a holding lip 27 in which a base end section 27a is connected to an internal surface of the vehicle inside side wall and one side face 27c of a tip 27b is brought into elastic contact with the vehicle inside side face 2a of the flange section. A notch section 29 is provided at a position on the base end section side of the one side face of the tip of the holding lip. The tip is formed to be bendable through the notch section.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present invention relates to a weather strip for an automobile that is attached to the periphery of a door opening on the vehicle body side and elastically contacts the door to seal the interior and exterior of the vehicle. [Background technology]

[0002] A known example of a conventional weather strip for an automobile (hereinafter simply referred to as a weather strip) for this type of door opening is that described in Patent Document 1 below.

[0003] FIG. 1 is a perspective view of an automobile to which the present invention and a conventional automobile weatherstrip are applied, FIG. 2 is a cross-sectional view taken along line AA in FIG. 1 showing the conventional automobile weatherstrip, FIG. 3 is a cross-sectional view of the essential parts showing the structure of the flange side of the vehicle body opening, and FIG. 4 is a schematic diagram showing the path of noise entering the vehicle interior.

[0004] As shown in Figures 1 to 3, the weatherstrip 1 described in this publication is attached to a flange portion 2 made up of multiple overlapping metal panels P1 to P3 formed along the periphery of a body opening 03 of an automobile 01, for example, a front door 02.

[0005] As shown in Figure 2, this weatherstrip 1 has an inverted U-shaped mounting base 3 that is inserted and fitted into the tip of the flange portion 2 and has an interior side wall 4, an exterior side wall 5, and connecting walls 6 that connect both side walls 4, 5, and a hollow seal portion 7 made of sponge rubber that is integrally formed on the outer surface of the exterior side wall 5 of the mounting base 3 and that elastically contacts the peripheral portion of the front door 02 when the front door 02 is closed.

[0006] The mounting base 3 has a U-shaped core 3a embedded therein, and three protrusions 5a, 5b, and 5c that abut against the exterior side surface of the flange 2 are integrally formed on the inner surface of the exterior side wall 5. Meanwhile, a retaining lip 8 protrudes toward the exterior side wall 5 from the inner surface of the lower end of the interior side wall 4, opposite the connecting wall 6. A base end 8a of this retaining lip 8 is joined to the lower end of the interior side wall 4, and one side surface 8c of a tip end 8b is in elastic contact with the interior side surface 2a of the flange 2. The protrusions 5a to 5c and the retaining lip 8 abut against both side surfaces 2a, 2b of the flange 2 in a sandwiched state, thereby holding the mounting base 3.

[0007] A lip portion 9 extending toward the interior of the vehicle is integrally provided between the connecting wall 6 of the mounting base 3 and the interior side wall 4. The inner surface of this lip portion 9 is in elastic contact with the outer end of an interior material 10 such as a door trim or garnish that extends from the interior side toward the interior side wall 4.

[0008] Furthermore, a low-density sponge material 11 with a specific gravity of 0.05 to 0.4 is provided on the inner surface of the connecting wall 6, with which the tip of the flange portion 2 formed by overlapping the multiple metal panels elastically comes into contact, and this low-density sponge material 11 blocks noise that enters the vehicle interior through the overlapping portions of the flange portion 2. [Prior art documents] [Patent documents]

[0009] [Patent Document 1] Japanese Patent Application Laid-Open No. 2009-286280 (see FIG. 12) Summary of the Invention [Problem to be solved by the invention]

[0010] 2 and 3, the flange portion 2 is formed by overlapping a plurality of metal panels P1 to P3, which are joined together by intermittent spot welding in the longitudinal direction, and in order to increase strength, many of them are joined using a so-called joggle processing method using a press machine. Therefore, due to its structure, the flange portion 2 is prone to generating an uneven step surface 12 on the surface of the interior side surface 2a, as shown in FIG.

[0011] Therefore, even if one side surface 8c of the tip portion 8b of the retaining lip 8 protruding from the end of the interior side wall 4 abuts against the interior side surface 2a of the flange portion 2 as in the conventional technology, noise d that has entered the interior of the mounting base 3 from outside the vehicle via the flange portion 2, as shown by the black arrow in Figure 4, may pass through the gap between the uneven step surface 12 and one side surface 8c of the retaining lip 8 and enter the interior of the vehicle, as shown by the white arrow in Figure 4.

[0012] In other words, the retaining lip 8 is unable to conform to the uneven changes in the stepped surface 12 of the flange portion 2 by having one side 8c of the tip portion 8b deform in a tight fit, resulting in a gap being created between the one side 8c of the tip portion 8b and the stepped surface 12, which may allow noise d to penetrate into the interior of the vehicle through this gap.

[0013] The present invention was devised in view of the technical problems with the conventional automotive weatherstrips described above, and aims to provide an automotive weatherstrip that can suppress the transmission and intrusion of noise from inside the mounting base to the inside of the vehicle by having the tip of the retaining lip flex and deform via the notch portion to follow the uneven changes in the stepped surface on the outer surface of the flange portion, absorbing the unevenness and elastically contacting the inside side of the flange portion in a tight contact state. [Means for solving the problem]

[0014] The invention described in claim 1 of the present application is an automotive weatherstrip comprising: a mounting base attached to a flange formed by overlapping a plurality of metal panels formed along the edge of a door opening of a vehicle body, the mounting base having an interior side wall, an exterior side wall, and a connecting wall connecting the both side walls; a hollow seal portion integrally formed on the outer surface of the mounting base and elastically contacting the door when the door is closed; and a retaining lip having a base end connected to the inner surface of the interior side wall of the mounting base and one side surface of a tip end elastically contacting the interior side surface of the flange portion, One side surface of the tip of the retaining lip Among them, the part adjacent to the part that elastically contacts the inside side of the flange part a notch portion is provided at a position where the tip portion is bendable via the notch portion; The tip portion is deflected and deformed by following the unevenness of the stepped surface on the outer surface of the flange portion via the notch portion. It is characterized by the following. [Effects of the Invention]

[0015] According to the invention described in claim 1 of the present application, the tip of the retaining lip flexes and deforms via the notch portion in response to changes in the unevenness of the stepped surface on the outer surface of the flange portion, absorbing the unevenness and elastically contacting the inner side of the flange portion in a tight contact state, thereby suppressing the transmission and intrusion of noise from inside the mounting base to the inside of the vehicle. [Brief explanation of the drawings]

[0016] [Figure 1] 1 is a perspective view of an automobile to which the present invention and a conventional automobile weather strip are applied; [Figure 2] FIG. 2 is a cross-sectional view taken along line AA in FIG. 1 showing a conventional weather strip for an automobile. [Figure 3] 4 is a cross-sectional view of a main part showing the structure of the flange portion side of the vehicle body opening. FIG. [Figure 4] FIG. 2 is a schematic diagram showing paths of noise entering the vehicle interior. [Figure 5] 1 is a cross-sectional view taken along line AA in FIG. 1, showing a first embodiment of an automotive weatherstrip according to the present invention. [Figure 6] FIG. 6 is an enlarged view of a main part of the automotive weather strip shown in FIG. 5. [Figure 7]FIG. 2 is a cross-sectional view taken along line AA in FIG. 1, showing a second embodiment of an automotive weatherstrip according to the present invention. [Figure 8] 1 is a graph showing experimental results of the relationship between the contact surface width with respect to the flange portion of an automotive weather strip according to the present invention and sound insulation. [Figure 9] FIG. 2 is a cross-sectional view taken along line AA in FIG. 1, showing a third embodiment of an automotive weatherstrip according to the present invention. [Figure 10] FIG. 10 is an enlarged view of a main part of the automotive weather strip shown in FIG. [Figure 11] FIG. 2 is a cross-sectional view taken along line AA in FIG. 1, showing a fourth embodiment of an automotive weatherstrip according to the present invention. [Figure 12] FIG. 2 is a cross-sectional view taken along line AA in FIG. 1, showing a fifth embodiment of an automotive weatherstrip according to the present invention. [Figure 13] FIG. 10 is a cross-sectional view showing a state in which the automotive weatherstrip of the fifth embodiment is coming out of the flange portion. [Figure 14] FIG. 2 is a cross-sectional view taken along line AA in FIG. 1, showing a sixth embodiment of an automotive weatherstrip according to the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0017] Hereinafter, various embodiments of an automotive weatherstrip according to the present invention will be described with reference to the drawings. Like the conventional weatherstrip, this weatherstrip is applied to be attached to the periphery of the door opening of a front door of a vehicle body.

[0018] FIG. 5 is a cross-sectional view taken along line AA in FIG. 1 showing a first embodiment of an automotive weatherstrip according to the present invention, and FIG. 6 is an enlarged view of a main part of the automotive weatherstrip shown in FIG.

[0019] As described above, the weatherstrip 21 is attached to the flange 2 formed along the periphery of the body opening 03 of the front door 02 of the automobile 01 shown in Fig. 1. This flange 2 is formed by overlapping, for example, three metal panels P1 to P3 and joining them intermittently in the longitudinal direction by spot welding and also by using a joggle machining method. Therefore, the flange 2 has an uneven step surface 12 formed on, for example, the interior side surface 2a of the automobile. As shown in Figures 5 and 6, the weatherstrip 21 of the first embodiment has an inverted U-shaped mounting base 22 that is inserted and fitted into the flange portion 2 and has an interior side wall 23, an exterior side wall 24, and connecting walls 25 that connect both side walls 23, 24, and a hollow seal portion 26 made of sponge material that is integrally formed on the outer surface of the exterior side wall 24 of the mounting base 22 and that elastically contacts the peripheral portion of the front door 02 when the front door 02 is closed, for example.

[0020] The mounting base 22 is integrally molded from a hard rubber material or a hard resin material to ensure rigidity, and has a core material 22a with a U-shaped cross section embedded therein. The mounting base 22 also has three protrusions 24a, 24b, and 24c integrally formed on the inner surface of the vehicle-exterior side wall 24, which abut against the vehicle-exterior side surface of the flange portion 2, and a retaining lip 27 protruding toward the vehicle-exterior side wall 24 from the lower end of the inner surface of the vehicle-interior side wall 23 in the drawing.

[0021] 6, the retaining lip 27 has a base end 27a joined to the lower end of the inner surface of the interior side wall 23, and one side 27c of the tip end 27b elastically contacts the interior side surface 2a of the flange portion 2. The inner surfaces of the protrusions 24a to 24c and one side surface 27c of the tip end 27b of the retaining lip 27 elastically contact the interior side surface 2a and the exterior side surface 2b of the flange portion 2 in a sandwiched state, thereby retaining the mounting base 22.

[0022] A lip portion 28 extending toward the interior of the vehicle is integrally provided between the connecting wall 25 of the mounting base 22 and the interior side wall 23. The inner surface of this lip portion 28 is in elastic contact with the outer end of interior material 10 such as a door trim or garnish that extends from the interior side toward the interior side wall 23.

[0023] 5 and 6, the retaining lip 27 has a notch 29 formed below one side surface 27c of the tip portion 27b, i.e., near the base end portion 27a. This notch 29 is formed in a cut-like shape along the longitudinal direction of the retaining lip 27, which is the circumferential direction of the vehicle body opening 03. Therefore, the tip portion 27b can be freely flexibly deformed toward the flange portion 2 via this notch 29, and one side surface 27c of the tip portion 27b flexibly deforms in accordance with the unevenness of the step surface 12 on the interior side surface 2a of the flange portion 2, thereby absorbing the unevenness and elastically contacting the interior side surface 2a of the flange portion 2 in a tight contact state. [Functions and Effects of the Weatherstrip According to the Present Embodiment] As shown in Figures 5 and 6, when the weatherstrip 21 according to this embodiment having the above configuration is attached by inserting and fitting the mounting base 22 into the flange portion 2 formed on the periphery of the vehicle body opening 03, when one side 27c of the tip portion 27b of the retaining lip 27 abuts against the interior side surface 2a of the flange portion 2, the reaction force causes the notch portion 29 to open, and the one side surface 27c of the tip portion 27b flexes and deforms to conform to the uneven step surface 12 of the interior side surface 2a of the flange portion 2, thereby elastically contacting in a tight contact state with a uniform and constant abutment area.

[0024] In this way, the tip 27b of the retaining lip 27 opens via the notch 29, and the one side surface 27c elastically contacts the stepped surface 12 of the interior side surface 2a of the flange 2 in a manner that conforms to the stepped surface 12. In other words, even if the interior side surface 2a of the flange 2 has irregularities, the one side surface 27c elastically contacts the stepped surface 12 in a manner that absorbs the irregularities. Therefore, it is possible to sufficiently prevent a gap from being generated between the interior side surface 2a of the flange 2 and the one side surface 27c of the tip 27b of the retaining lip 27.

[0025] As a result, as shown by the white arrow in Figure 4, the transmitted sound, which is noise d that has entered the inside of the mounting base 22 from the outside of the flange portion 2, is sufficiently blocked by one side surface 27c of the tip portion 27b of the retaining lip 27, making it possible to effectively suppress the intrusion of the transmitted sound toward the interior of the vehicle.

[0026] When a force acts on the mounting base 22 of the weatherstrip 21 in a direction that causes it to slip out of the flange 2, the notch 29 closes, generating a reaction force at the tip 27b of the retaining lip 27, which presses against the interior side surface 2a of the flange 2. This makes it difficult for the mounting base 22 to easily slip out of the flange 2. Second Embodiment FIG. 7 shows a second embodiment of the present invention, in which, assuming the basic structure of the first embodiment, such as the presence of the notch portion 29, the contact surface width W when one side surface 27c of the tip portion 27b of the retaining lip 27 elastically contacts the vehicle interior side surface 2a of the flange portion 2 is set to a range of approximately 2 mm to approximately 6 mm.

[0027] Figure 8 is a graph showing the results of various experiments conducted by the inventors of the present application on the relationship between the contact surface width W (sealing width) of one side 27c of the tip 27b of the retaining lip 27 and the interior side 2a of the flange portion 2 and the sound insulation, with the vertical axis representing the transmission level SPL (dB-A) and the horizontal axis representing the contact surface width W (mm).

[0028] This experiment revealed that increasing the contact surface width W of the one side surface 27c reduces (improves) the sound transmission level SPL, and decreasing the contact surface width W increases (worsens) the sound transmission level SPL. That is, according to the experiment, when the contact surface width W is set to, for example, 2.0 mm or less, the sound transmission level SPL increases and the sound insulation performance decreases, but when the contact surface width W is set to 2.0 mm or more, the sound insulation performance increases. However, when the contact surface width W is set to, for example, 6.0 mm or more, this increases the frictional resistance of the retaining lip 27 against the vehicle-interior side surface 2a of the flange portion 2 when inserting and fitting the mounting base 22 into the flange portion 2, increasing the insertion force and thereby worsening the assemblability of the weatherstrip 21 to the flange portion 2.

[0029] Therefore, the results of the inventor's experiments revealed that setting the contact surface width W within the range of 2.0 mm to 6.0 mm ensures good assembly of the weatherstrip 21 (mounting base 22) to the flange portion 2 while providing high sound insulation. Therefore, in this embodiment, the contact surface width W is set within the range of 2.0 mm to 6.0 mm. However, if ease of assembly of the weatherstrip 21 to the flange portion 2 is important, it is desirable to set the contact surface width W within the range of 2.0 mm to 3.0 mm. Third Embodiment 9 and 10 show a third embodiment of the present invention. In this embodiment, based on the configuration of the second embodiment, a soft sponge rubber material 30 is coated from the notch portion 29 at the tip end 27b of the retaining lip 27 to the entire outer surface including one side surface 27c, and from the upper surface of the retaining lip 27 to the vicinity of the base end 27a.

[0030] The soft sponge rubber material 30 is made of a sponge rubber material with a specific gravity of 0.4 to 0.7. The contact surface width W of one side surface 27c of the tip portion 27b of the holding lip 27 with the vehicle interior side surface 2a of the flange portion 2 is set within a range of 2.0 mm to 6.0 mm, for example, and is preferably set to 2.0 mm to 3.0 mm.

[0031] Therefore, according to the third embodiment, the soft sponge rubber material 30 covers the one side surface 27c of the tip portion 27b of the retaining lip 27. When the one side surface 27c elastically contacts the interior side surface 2a of the flange portion 2, the soft sponge rubber material 30, in combination with the action and effect of the notch portion 29, allows the soft sponge rubber material 30 to more flexibly conform and deform to the shape of the uneven step surface 12 of the interior side surface 2a, thereby making the elastic contact more conformal. In other words, the soft sponge rubber material 30 effectively absorbs the uneven step surface 12, thereby more effectively preventing the occurrence of a gap between the one side surface 27c of the tip portion 27b and the interior side surface 2a. This sufficiently suppresses the propagation of noise that passes through the retaining lip 27 from within the mounting base 22.

[0032] Furthermore, the contact surface width W of the soft sponge rubber material 30 on one side 27c of the tip portion 27b with the vehicle interior side surface 2a of the flange portion 2 is set within the range of 2.0 mm to 6.0 mm, as mentioned above, thereby achieving high sound insulation while ensuring good assembly of the weather strip 21 (mounting base 22) with the flange portion 2. [Fourth embodiment] Figure 11 shows a fourth embodiment of the present invention, which is based on the configuration of the first embodiment and has a second retaining lip 31 made of sponge rubber at a position closer to the base end 27a than the tip end 27b of the retaining lip 27, which abuts against the vehicle interior side surface 2a of the flange portion 2 from the opposite direction to the tip end 27b when the mounting base 22 is inserted and fitted into the flange portion 2.

[0033] The second retaining lip 31 has a short width L in the direction of the flange 2, is formed entirely from sponge rubber, and has a base end 31a joined to one side surface 27c of the retaining lip 27 at approximately the center in the width direction, while one side surface 31c of the tip end 31b elastically contacts the vehicle-interior side surface 2a of the flange 2 in the opposite direction to one side surface 27c of the tip end 27b of the retaining lip 27, i.e., they form a V-shape. Therefore, the second retaining lip 31 has a short width L in the direction of the flange 2, and its cross-sectional width is also thinner than that of the retaining lip 27.

[0034] Therefore, according to this embodiment, when the mounting base 22 is inserted and fitted into the flange portion 2, one side 27c of the tip 27b of the retaining lip 27 and one side 31c of the tip 31b of the second retaining lip 31 come into doubly abutting (elastically contacting) contact from opposite directions against the vehicle interior side surface 2a of the flange portion 2. This increases the sound insulation effect from inside the mounting base 22 to the vehicle interior, and in particular, because the second retaining lip 31 is formed entirely from sponge rubber, it flexes and deforms in accordance with the uneven stepped surface 12 on the vehicle interior side surface 2a of the flange portion 2, absorbing the steps and thereby increasing the sound insulation effect.

[0035] Furthermore, in this embodiment, the retaining lip 27 and the second retaining lip 31 are in elastic contact with the vehicle interior side surface 2a of the flange portion 2, so the mounting base 22 can be held stably and firmly, and a reaction resistance is generated against a force in the direction of removal of the mounting base 22, preventing inadvertent removal. However, since the second retaining lip 31 is formed entirely from sponge rubber material, no significant frictional resistance is generated when the mounting base 22 is inserted and fitted into the flange portion 2, so there is no significant impact on assemblability.

[0036] Fifth Embodiment FIG. 12 shows a fifth embodiment of the present invention, which differs from the first embodiment in that the structure of the tip end portion 27b of the holding lip 27 is changed.

[0037] That is, as shown in FIG. 12, the tip portion 27b of the retaining lip 27 is formed to extend further toward the vehicle exterior side wall 24 than that of the first embodiment, and the entire tip portion 27b, including one side surface 27c, is formed from sponge rubber material, and a notch portion 29 is formed in the central portion of the tip portion 27b near the base end portion 27a, which is not formed from sponge rubber material.

[0038] In other words, the entire tip portion 27b is made of sponge rubber material, but a notch portion 29 is formed in the central portion made of hard rubber material or hard resin material closer to the base end portion 27a than the tip portion 27b.

[0039] Therefore, according to this embodiment, when the mounting base 22 is inserted and fitted into the flange 2, the tip 27b of the retaining lip 27 bends at the notch 29, and the entire one side surface 27c of the long portion of the tip 27b elastically contacts the interior side surface 2a. In other words, the entire one side surface 27c of the long portion of the sponge rubber tip 27b elastically contacts the interior side surface 2a, further increasing the contact surface width W1 (seal width) with the flange 2. As a result, the one side surface 27c of the sponge rubber tip 27b effectively absorbs the step surface 12 of the interior side surface 2a of the flange 2 and suppresses the generation of gaps, thereby significantly improving sound insulation. Moreover, because the long tip 27b is bendable by the notch 29, when the mounting base 22 is inserted and fitted into the flange 2, the tip 27b bends, and the frictional sliding resistance between the one side surface 27c and the interior side surface 2a of the flange 2 is reduced, as shown in FIG. 12 . Therefore, the effects of both improving sound insulation and improving the ease of assembly of the mounting base are achieved.

[0040] Furthermore, as shown in Figure 13, when a force is applied in the direction in which the mounting base 22 comes out of the flange portion 2, the tip portion 27b bends from the notch portion 29 and the entire long side surface 27c comes into contact with the vehicle interior side surface 2a of the flange portion 2, thereby increasing the frictional resistance and making it possible to suppress movement in the coming out direction. Sixth Embodiment FIG. 14 shows a sixth embodiment of the present invention, in which a second holding lip 32 is provided in parallel with the holding lip 27 at the lower end of the vehicle-interior side wall 23 of the mounting base 22 in the drawing.

[0041] That is, as shown in FIG. 14, the base end 27a of the retaining lip 27 is connected to the interior side wall 23 at approximately the center position in the vertical direction in the figure, and the tip end 27b is in elastic contact with the vicinity of the upper end of the interior side surface 2a of the flange portion 2 via the notch portion 29.

[0042] On the other hand, the second retaining lip 32 is formed entirely from sponge rubber material, with its base end 32a joined to the lower end of the interior side wall 23 and its tip end 32b formed to be approximately the same length as the length to the tip end 27b of the retaining lip 27, and one side 32c of the tip end 32b elastically contacting the interior side surface 2a of the flange portion 2.

[0043] According to the sixth embodiment, the second retaining lip 32 is formed entirely from sponge rubber, and therefore, as shown in Fig. 14, when the mounting base 22 is inserted and fitted into the flange portion 2, the elastic reaction force of the second retaining lip 32 is small, and the frictional sliding resistance against the vehicle interior side surface 2a is almost exclusively at the tip end 27b of the retaining lip 27. This reduces the impact on the assembly work of the mounting base 22. Furthermore, transmitted sound that has entered the interior of the mounting base 22 is blocked by the double sound-insulating lips of the retaining lip 27 and the second retaining lip 32, making it possible to effectively restrict the flow of noise toward the vehicle interior.

[0044] In particular, since the second retaining lip 32 is formed entirely from sponge rubber material, as described above, the assembly of the mounting base 22 is improved, and the sound-proofing effect is further enhanced by improving the ability to conform to the uneven step surface 12 on the vehicle interior side surface 2a of the flange portion 2.

[0045] The present invention is not limited to the configurations of the above-described embodiments, and the weather strip 21 may be applied to the periphery of the opening of the back door in addition to the opening of the front door.

[0046] The shape, size, height, etc. of the retaining lip 27 can be further changed depending on the location and specifications of the weatherstrip 21. The material of the retaining lip 27 can also be other soft rubber materials or soft resin materials, as long as it can absorb the uneven step surface 12 on the vehicle interior side surface 2a of the flange portion 2 and suppress the occurrence of gaps. [Explanation of symbols]

[0047] 01...Automobile 02...Front door 03...Body opening 1...Conventional automotive weather strips 2...Flange 2a...Inside of the vehicle 2b…Outside side of vehicle 12...Step surface 21...Automotive weather strips 22...Mounting base 23...Inside wall of the car 24...Outside side wall of the vehicle 25…Connecting wall 26...Hollow seal part 27...Retaining lip 27a...Proximal end 27b...Tip 27c…one side 29...Notch 30...Soft sponge rubber material 31...Second retaining lip 31a...Base 31b...Tip 31c…one side 32...Second retaining lip 32a...Proximal end 32b...Tip 32c…one side

Claims

1. a mounting base attached to a flange formed by overlapping a plurality of metal panels along the edge of a door opening of a vehicle body, the mounting base having an interior side wall, an exterior side wall, and a connecting wall connecting the both side walls; a hollow seal portion integrally formed on the outer surface of the mounting base and elastically contacting the door when the door is closed; and a retaining lip having a base end connected to the inner surface of the interior side wall of the mounting base and one side surface of a tip end elastically contacting the interior side surface of the flange portion, a notch is provided on one side surface of the tip portion of the retaining lip at a position close to a portion that elastically contacts the vehicle interior side surface of the flange portion, and the tip portion is formed to be bendable via the notch; The weatherstrip for an automobile is characterized in that the tip portion is flexibly deformed by following the unevenness of the stepped surface on the outer surface of the flange portion via the notch portion.

2. 2. The weather strip for an automobile according to claim 1, A weatherstrip for an automobile, characterized in that one side surface of the tip of the retaining lip has a contact surface width set within a range of approximately 2.0 mm to 6.0 mm when in elastic contact with the vehicle interior side surface of the flange portion.

3. 2. The weather strip for an automobile according to claim 1, A weather strip for an automobile, characterized in that at least a portion of the one side surface of the tip of the retaining lip that elastically contacts the flange portion is covered with a soft sponge rubber material.

4. 2. The weather strip for an automobile according to claim 1, a second retaining lip portion made of sponge rubber material that is branched off and provided on one side of the tip of the retaining lip, at a position closer to the base end than the notch portion, and that abuts against the interior side of the flange portion from the opposite direction to the tip of the retaining lip when the mounting base is inserted and fitted to the flange portion.

5. 2. The weather strip for an automobile according to claim 1, The retaining lip has a tip end portion extending toward the vehicle exterior side wall, and a majority of the tip end portion is formed of a sponge rubber material, The weather strip for an automobile is characterized in that the notch portion is formed at a position near the base end portion where the tip portion is not made of sponge rubber.

6. 2. The weather strip for an automobile according to claim 1, The vehicle interior side wall of the mounting base is provided with a retaining lip at approximately the center of the inner width direction of the vehicle interior side wall, and a second retaining lip made of sponge rubber material is provided at the end of the vehicle interior side wall opposite the connecting wall, so that the vehicle interior side surface of the flange portion is doubly sealed by the retaining lip and the second retaining lip.

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