Door seal

Abstract

Provided is a door weather strip for a vehicle that suppresses a door frame of a door for a vehicle from being drawn out to the outside in the vehicle width direction by a pressure difference between the inside and outside of the vehicle when the vehicle is traveling at high speed. The door weather strip (10) has a mounting base (21) that is mounted to the door frame or a door trim, and a sealing lip (22) that abuts against a door opening portion peripheral edge (6) when the door (1) is closed. A protrusion (23) that abuts against the door opening portion peripheral edge (6) when the door (1) is closed is formed on the door opening portion peripheral edge (6) side of a front end portion (22a) of the sealing lip (22). A hard portion (70) that is harder than the material that constitutes the sealing lip (22) is formed so as to extend from a lower area of the protrusion (23) to the root portion (22b) side of the sealing lip (22).

Description

Technical Field

[0001] This invention relates to a door sealing strip, for example, installed on the outer periphery of the door frame of a car door. Background Technology

[0002] For example, such as Figure 9 As shown, the door sealing strip 100 is installed on the door frame 201 and the door trim 600.

[0003] The door sealing strip 100 is composed of an outer sealing strip 200, an inner sealing strip 300, and a sealing strip connecting portion 400. The outer sealing strip 200 is composed of an outer mounting base 210 and an outer sealing portion 220 (sealing lip). A protrusion 230 is formed at the front end 220a of the outer sealing portion 220, on the inner side (inner side) in the vehicle width direction. When the door is closed, the protrusion 230 abuts against the periphery 601 of the body opening, and the root 220b of the outer sealing portion 220 deforms toward the outer mounting base 210, sealing the gap between the periphery 601 of the body opening and the front end of the door trim 600. The outer sealing portion 220 is lip-shaped, so it is easy to deform, which can reduce the door closing force (e.g., Patent Document 1).

[0004] However, if the car is traveling at high speed, the pressure on the outside of the door is significantly lower than the pressure on the inside. Therefore, this pressure difference causes friction between the door frame 201 and the door trim 600. Figure 9 The force F1 shown is directed towards the outer side of the vehicle. At this time, the outer sealing portion 220, which is in elastic contact with the periphery 601 of the vehicle body opening, is in contact with the periphery 601 of the vehicle body opening.

[0005] A reaction force F2 is generated between (protrusion 230) and the vehicle interior.

[0006] However, the outer sealing part 220 is lip-shaped and easily deformed, so if F1 increases, then... Figure 9 As shown, the outer sealing portion 220 of the vehicle undergoes a significant arc-shaped flexural deformation, resulting in the door frame 201 and door trim 600 moving in the direction of arrow A. This outward movement of the door frame 201 and door trim 600, i.e., the phenomenon of being drawn outward, reduces sound insulation.

[0007] As a countermeasure against the door frame 201 being sucked out, for example, the following technology is described in Patent Document 2. Figure 10 As shown, a rigid part 700 is formed on the inner side (inner side) of the sealing lip 220 of the door sealing strip 100 in the vehicle width direction. The rigid part is made of a hard material, which is harder than the sponge material of EPDM that constitutes the sealing lip 220.

[0008] The rigid portion 700 is formed from the root 220b of the sealing lip 220 to a position slightly below the central portion, i.e. Figure 9 The inner side of the sealing lip 220, which is deformed by a large arc, is exposed.

[0009] A rigid portion 700 is formed inside the sealing lip 220. When a force F1 is generated on the outside of the door frame 201 in the vehicle width direction due to the pressure difference between the inside and outside of the vehicle during vehicle operation, the rigid portion 550 formed inside the sealing lip 220 can prevent the sealing lip 220 from deflecting to a degree greater than or equal to a certain degree. Therefore, the reaction force F2 generated between the sealing lip 220 (protrusion 230) and the periphery 601 of the body opening in the direction toward the inside of the vehicle width direction is equal to or close to F1.

[0010] As a result, the door frame 201 can be prevented from being sucked outwards, thus improving sound insulation at high speeds.

[0011] Patent Document 1: Japanese Patent Application Publication No. 2010-36602

[0012] Patent Document 2: Japanese Patent Application Publication No. 2022-48478

[0013] However, regarding the technology in Patent Document 2, the sealing lip 220, including the protrusion 230 (excluding the portion with the rigid part 700), particularly the front end 220a side of the sealing lip 220, is still prone to flexing. Therefore, when a force F1 is generated on the door frame 201 towards the outer side of the vehicle width direction due to the pressure difference between the inside and outside of the vehicle during high-speed driving, the front end 220a side flexes, and the rigid part 700 takes time to make the reaction force F2 equal to or close to F1. As a result, during this time, the door frame 201 is pulled outwards.

[0014] Additionally, when the reaction force F2 is generated, such as Figure 11 As shown in (a), the protrusion 230 rotates and deforms in the direction of the solid arrow Y on the root 220b side. The portion of the protrusion 230 that abuts against the periphery 601 of the vehicle body opening expands in the area from the protrusion 230 to the front end 220a, thus increasing the contact area with the periphery 601 of the vehicle body opening. This increases the reaction force F2. However, if the reaction force F2 is greater than or equal to a certain constant value, then... Figure 11 As shown in (b), a root Z-bending phenomenon occurs in the protrusion 230 at the root 220b side of the sealing lip 220 of the protrusion 230. This bending phenomenon hinders the increase of the reaction force F2 and complements the deflection at the front end 220a side of the sealing lip 220, making the effect of the rigid part 700 insufficient. Summary of the Invention

[0015] The purpose of this invention is to provide a door sealing strip for automobiles that can further suppress the situation where the door frame of the automobile door is sucked outward due to the pressure difference between the inside and outside of the vehicle when the vehicle is traveling at high speed.

[0016] To solve the above problems, the present invention, technical solution 1, is a door sealing strip that seals the area between the car door and the periphery of the car body opening. It is installed on the outer periphery of the car door frame. The door sealing strip is characterized by having: a mounting base installed on the car door frame or a door trim; and a sealing lip that abuts against the periphery of the car body opening when the door is closed. A protrusion is formed at the front end of the sealing lip on the periphery side of the car body opening, abutting against the periphery of the car body opening when the door is closed. In the sealing lip, a hard portion harder than the material constituting the sealing lip is formed and extends from the area below the protrusion towards the root side of the sealing lip.

[0017] In the present invention of technical solution 1, the door sealing strip has: a mounting base, which is mounted on the door frame or the door trim; and a sealing lip, which abuts against the periphery of the body opening when the door is closed. A protrusion is formed on the periphery side of the body opening at the front end of the sealing lip, which abuts against the periphery of the body opening when the door is closed. In the sealing lip, a hard part harder than the material constituting the sealing lip is formed and extends from the area below the protrusion to the root side of the sealing lip. Therefore, firstly, when a force F1 is generated in the door frame towards the outer side of the vehicle width direction (outer side of the vehicle) due to the pressure difference between the inside and outside of the vehicle when the vehicle is traveling at high speed, the deflection of the front end of the sealing lip is reduced. Therefore, the time when the reaction force F2 in the direction towards the inner side of the vehicle width direction (inner side of the vehicle) is equal to or close to F1 in the direction of suction towards the outer side of the vehicle can be shortened.

[0018] Secondly, the rigid part also exists in the area below the protrusion, so even if the reaction force F2 increases, it can prevent the protrusion from bending at the root of the sealing lip. Therefore, the reaction force F2 can be equal to or close to F1. As a result, it can prevent the door frame from being sucked outwards.

[0019] Based on the invention of technical solution 1, the rigid part of technical solution 2 is not formed in the part where the sealing lip is greatly deformed when the door is opened and closed, or it is formed thinner than the front end side of the sealing lip.

[0020] By forming the rigid part to extend from the area below the protrusion toward the root of the sealing lip, the deflection of the front end of the sealing lip can be reduced, and the bending deformation of the protrusion can be prevented. This can achieve the effect of increasing the reaction force F2. However, if the rigid part is formed to extend to the vicinity of the root of the sealing lip, the sealing lip is difficult to bend when the door is closed, the resistance when closing the door increases, and it is difficult to close the door.

[0021] In the present invention of technical solution 2, the rigid part is not formed in the part where the sealing lip deforms significantly when the door is opened and closed, or it is formed thinner than the front end side of the sealing lip, so that the effect of the rigid part can be maintained and the door can be prevented from being difficult to close.

[0022] Based on the invention of technical solution 1 or technical solution 2, the hard part of the invention of technical solution 3 is formed on the front end side of the sealing lip, and is arranged to extend towards the front end of the sealing lip and towards the outer side of the sealing lip.

[0023] In the present invention of technical solution 3, the rigid part is formed on the front end side of the sealing lip and is provided to extend towards the front end of the sealing lip and towards the outer side of the sealing lip. That is, in the region below the protrusion of the sealing lip, the rigid part is thickened in such a way that it extends outward from the front end of the sealing lip. Therefore, firstly, the deflection of the front end of the sealing lip is further reduced, and the time for the reaction force F2 to be equal to or close to F1 can be shortened by the rigid part.

[0024] Secondly, the rigid part is thickened in a way that extends outward from the front end of the sealing lip, so that even if the rigid part is not formed in the part where the sealing lip deforms significantly when the door is opened and closed, or is formed thinner than the front end of the sealing lip, the effect of the rigid part can be maintained and the door can be prevented from being difficult to close.

[0025] Technical Solution 4 of the present invention is a door sealing strip that seals between the car door and the periphery of the body opening. It is installed on the outer periphery of the door frame of the car door. The door sealing strip has: a mounting base that is installed on the door frame or door trim; and a sealing lip that abuts against the periphery of the body opening when the door is closed. A protrusion that abuts against the periphery of the body opening when the door is closed is formed on the periphery side of the body opening at the front end of the sealing lip. In the sealing lip, a hard part harder than the material constituting the sealing lip includes the protrusion and the root of the sealing lip near the root of the protrusion. It is formed in the area from the inside of the car to the outside of the car in the direction of the front end of the sealing lip.

[0026] In the present invention of technical solution 4, a rigid portion harder than the material constituting the sealing lip includes a protrusion and a portion near the root of the sealing lip on the root side of the protrusion. This rigid portion traverses the sealing lip in the direction of its front end and is formed in the region from the inner side of the vehicle to the outer side. Therefore, the rigid portion minimizes the deflection of the front end of the sealing lip, shortening the time required for the reaction force F2 to be equal to or close to F1. Furthermore, the front end portion of the sealing lip, including the protrusion, is formed of a rigid portion. Therefore, even if the root side is more flexible than the rigid portion of the sealing lip, the reaction force F2 can still be equal to or close to F1. As a result, it is possible to prevent the door frame from being sucked outwards.

[0027] Based on the invention of technical solution 4, the hard part of technical solution 5 is formed to extend towards the root side of the sealing lip.

[0028] In the present invention of technical solution 5, the rigid part is formed to extend towards the root side of the sealing lip, thereby suppressing the deflection of the sealing lip. The rigid part makes the reaction force F2 equal to or close to F1.

[0029] The effects of the invention

[0030] A door sealing strip seals the area between a car door and the periphery of a body opening. It is installed on the outer periphery of the door frame. The door sealing strip includes: a mounting base installed on the door frame or a door trim; and a sealing lip that abuts against the periphery of the body opening when the door is closed. A protrusion is formed at the front end of the sealing lip on the periphery side of the body opening, abutting against the periphery of the body opening when the door is closed. A hard portion, harder than the material constituting the sealing lip, is formed extending from below the protrusion towards the root of the sealing lip. Therefore, firstly, when a force F1 is generated in the door frame towards the outer side (outer side of the vehicle) due to the pressure difference between the inside and outside of the vehicle during high-speed driving, the deflection at the front end of the sealing lip is reduced. This shortens the time required for the reaction force F2 in the direction towards the inner side (inner side of the vehicle) to be equal to or close to F1 in the direction of suction towards the outer side of the vehicle.

[0031] Secondly, the rigid part also exists in the area below the protrusion, so even if the reaction force F2 increases, it can prevent the protrusion from bending at the root of the sealing lip. Therefore, the reaction force F2 can be equal to or close to F1. As a result, it can prevent the door frame from being sucked outwards. Attached Figure Description

[0032] Figure 1 This is a side view of a car door used in an embodiment of the present invention.

[0033] Figure 2This is a top view of the entire door sealing strip used in embodiments of the present invention.

[0034] Figure 3 It is along the door sealing strip used in the first embodiment of the present invention. Figure 1 The cross-sectional view of line AA in the figure is shown in (a), which is a view of the entire door sealing strip, and (b) is an enlarged view of part X in (a).

[0035] Figure 4 It is a graph showing the relationship between displacement and load in comparison with the first embodiment of the present invention and the prior art.

[0036] Figure 5 It is used along the door sealing strip of the second embodiment of the present invention. Figure 1 A cross-sectional view of line AA in the diagram.

[0037] Figure 6 It is used along the door sealing strip of the third embodiment of the present invention. Figure 1 The cross-sectional view of line AA in the figure is shown in (a), which is a view of the entire door sealing strip, and (b) is an enlarged view of part X in (a).

[0038] Figure 7 It is used along the door sealing strip of the fourth embodiment of the present invention. Figure 1 The cross-sectional view of line AA in the figure is shown in (a), which is a view of the entire door sealing strip, and (b) is an enlarged view of part X in (a).

[0039] Figure 8 It is used along the door sealing strip of the fifth embodiment of the present invention. Figure 1 The cross-sectional view of line AA in the figure is shown in (a), which is a view of the entire door sealing strip, and (b) is an enlarged view of part X in (a).

[0040] Figure 9 It is along the current door seal strip Figure 1 A cross-sectional view of line AA in the patent document (Patent Document 1).

[0041] Figure 10 It is along the current door seal strip Figure 1 A cross-sectional view of line AA in the patent document (Patent Document 2).

[0042] Figure 11 (a) means Figure 10 (a) is a diagram showing the action when the force in the suction direction is applied during high-speed travel, and (b) is a diagram showing the action when F2 increases compared to (a). Detailed Implementation

[0043] Figure 1 This is a side view of the car. (For example...) Figure 1 As shown, door frames 2 are provided on the upper outer periphery of the car door 1 on both the front and rear sides. Door sealing strips 10 are installed on the outer periphery of the door frames 2 to separate the door 1 from the periphery 6 of the car body opening. Figure 3 Seal between )

[0044] like Figure 2 As shown, regarding the door sealing strip 10, the upper portion 11 and the longitudinal portion 13, corresponding to the upper and longitudinal sides of the door frame 2, are formed into a strip shape by extrusion molding. The corner portion 12, corresponding to the corner portion of the door frame 2, connects the upper portion 11 and the longitudinal portion 13, and is formed by molding. Furthermore, this invention relates to the upper portion 11 of the door sealing strip 10. Also, this embodiment describes the left front door, but it is also applicable to the right front door and both rear doors.

[0045] based on Figure 3 The first embodiment of the present invention will be described. Figure 3 (a) is a view of the entire door sealing strip 10. Figure 3 (b) is Figure 3 (a) Enlarged view of portion X. In this first embodiment, the door frame 2 for mounting the door seal 10 is a so-called concealed structure. Figure 3 As shown in (a), the concealed door frame 2 is constructed such that the front end of the outer side of the vehicle is narrow and is covered by the door trim 60 installed on the outer periphery of the door frame 2, so that it cannot be seen from the outside of the vehicle.

[0046] The door trim 60 is continuously formed from the trim portion 61 and the retaining portion 62. Alternatively, the trim portion 61 and the retaining portion 62 can be formed separately. The door trim 60 secures the retaining portion 62 to the door frame 2 using rivets, clamps, screws, or the like.

[0047] The trim strip 61 has a predetermined width to cover the front end of the door frame 2, and its lower end is bent into a hairpin shape. A glass railing (not shown) is held in place by this hairpin-shaped portion and the inner surface of the door frame 2. On the other hand, the upper end is also similarly bent into a hairpin shape and is continuous with the retaining portion 62. The trim strip 61 and the retaining portion 62 are formed by bending a thin metal sheet such as stainless steel.

[0048] The retaining part 62 has a cross-sectional shape that is wider at the bottom, resembling the character "コ". The front end portion of the inner side of the retaining part 62 is bent into a hairpin shape, and a recess 63 is formed on the outer side end portion of the retaining part 62. The outer side mounting base 21 of the outer side sealing strip 20 of the door sealing strip 10 (described later) can be mounted and held in the recess 63.

[0049] The inner periphery of the door frame 2 is formed at a lower position than the outer periphery where the retaining part 62 is mounted, on the inner side of the door frame 2. A grooved door frame retaining part 2c is formed so that the inner side mounting base 31 of the inner side sealing strip 30 of the door seal 10 (described later) can be mounted. The inner panel 2b of the door frame 2 is bent to form the door frame retaining part 2c. Therefore, the inner side sealing strip 30 of the door seal 10 is mounted at a lower position than the outer side sealing strip 20.

[0050] like Figure 3 As shown in (a), the door sealing strip 10 has: an outer sealing strip 20; an inner sealing strip 30; and a connecting portion 40 that connects the outer sealing strip 20 and the inner sealing strip 30. The outer sealing strip 20 is installed on the outer side of the door frame 2, i.e., the aforementioned retaining portion 62, and seals the front end portion of the outer side of the door frame 2 between the periphery 6 of the body opening and the door frame 2.

[0051] The exterior sealing strip 20 of the door sealing strip 10 is composed of an exterior mounting base 21, a sealing lip 22, and a rigid part 70. Additionally, a core 25 is formed in the base portion of the exterior mounting base 21. The bottom surfaces of the interior and exterior side ends of the exterior mounting base 21 abut against the retaining portion 62 of the door trim 60, and the exterior side end is fitted into the recess 63 of the retaining portion 62 of the door trim 60.

[0052] Furthermore, regarding the relationship with the claims of this invention, the "mounting base" in claims 1 and 4, which states "...the door sealing strip has a mounting base installed on the door frame or door trim,...", refers to the outer mounting base 21 of the vehicle.

[0053] The sealing lip 22 is lip-shaped and extends upward and outward from the outer mounting base 21 of the outer sealing strip 20. A protrusion 23 is formed at the front end 22a of the sealing lip 22, which abuts against the periphery 6 of the body opening when the door 1 is closed. When the door 1 is closed, the protrusion 23 abuts against the periphery 6 of the body opening, and the sealing lip 22 flexes, sealing the gap between the periphery 6 of the body opening and the front end of the door trim 60. Furthermore, because the sealing lip 22 is lip-shaped, the area of ​​the sealing lip 22 other than the protrusion 23 and the rigid portion 70 described later is easily flexible, thus reducing the door closing force.

[0054] A rigid portion 70 is formed within the sealing lip 22. The rigid portion 70 extends from the region below the protrusion 23, specifically from the front end portion 22a of the sealing lip 22, further from the root Z of the protrusion 23, towards the root 22b of the sealing lip 22. Furthermore, the rigid portion 70 is connected to the core 25 of the vehicle exterior mounting base 21. Figure 3In this case, the rigid portion 70 is exposed on the inner side of the vehicle. Alternatively, it may not be exposed on the inner side of the vehicle but may be embedded within the sealing lip 22, or it may be exposed on the outer side of the vehicle. Regarding the protrusion 23, from the viewpoint of preventing bending at the root Z on the root side of the sealing lip 22, when the rigid portion 70 is embedded within the sealing lip 22, and when it is exposed on the outer side of the vehicle, it is preferable that the distance between the rigid portion 70 and the root Z of the protrusion 23 is less than or equal to half the thickness of the sealing lip 22. In addition, the rigid portion 70 may also be formed in a position where it is not connected to the outer side mounting base 21 but is separate from it.

[0055] like Figure 3 As shown in (a), the interior sealing strip 30 of the door sealing strip 10 is composed of an interior mounting base 31 and a hollow sealing portion 32. The interior mounting base 31 is mounted on the door frame retaining portion 2c, and the hollow sealing portion 32 elastically contacts the bulge 66 on the interior side of the body opening periphery 6 to seal the body opening periphery 6 and the door frame 2. The interior mounting base 31 is formed in an approximately plate-like shape, with its two side ends respectively embedded in the door frame retaining portion 2c of the door frame 2 to retain the interior sealing strip 30. In addition, a core portion 35 is formed in the center of the interior mounting base 31.

[0056] Regarding the door sealing strip 10, the core 25 of the outer mounting base 21, the core 35 of the inner mounting base 31, and the rigid part 70 are made of rigid EPDM (ethylene propylene diene rubber). The hardness of the rigid material is greater than or equal to the International Rubber Hardness (IRHD) 60.

[0057] On the other hand, the core 25, the outer vehicle mounting base 21 (excluding the rigid part 70), the sealing lip 22, the protrusion 23, the connecting part 40, the inner vehicle mounting base 31 (excluding the core 35), and the hollow sealing part 32 are made of soft EPDM sponge material. The specific gravity of the sponge material is greater than or equal to 0.4 and less than or equal to 1.0. By providing the cores 25 and 35, the rigidity of the outer vehicle mounting base 21 and the inner vehicle mounting base 31 can be improved. Alternatively, the cores 25 and 35 may not be formed.

[0058] Figure 4 The displacement of the sealing lip 22 in the outward direction of the vehicle and the generation of the reaction force F2 are shown in the case of a force F1 generated in the door frame 2 in the outward direction of the vehicle width (outer side of the vehicle) due to the pressure difference between the inside and outside of the vehicle at high speed. The relationship between the displacement of the sealing lip 22 in the outward direction of the vehicle and the load is illustrated. The dashed line indicates the case of the door sealing strip 100 in Patent Document 2.

[0059] according to Figure 4 It is clear that in this invention, the time until the load reaches its maximum value is shortened, and the maximum load value is also increased.

[0060] The reason for the shortened time until the maximum value is that, by forming a rigid part 70, which is harder than the material constituting the sealing lip 22, extending from the area below the protrusion 23 toward the root 22b of the sealing lip 22, the rigid part 70 below the protrusion 23 reduces the deflection of the front end 22a of the sealing lip 22 when a force F1 is generated in the door frame 2 toward the outside of the vehicle width direction (outside of the vehicle) due to the pressure difference between the inside and outside of the vehicle when the vehicle is traveling at high speed.

[0061] Furthermore, in this invention, the reason why the maximum load value increases and no observed load decrease occurs after reaching the maximum load value as is currently observed is that the rigid part 70 still exists in the region below the protrusion 23, thereby increasing F2, and the protrusion 23 does not increase at its root Z (on its root side). Figure 11 (b) Bending. As a result, F2 can be made equal to or approach F1 earlier.

[0062] Therefore, it can further suppress the door frame from being sucked outwards.

[0063] Next, based on Figure 5 The second embodiment of the present invention will be described. In this second embodiment, the door frame 2 for mounting the door sealing strip 10 is a sliding door type structure. The sliding door is a door with an outer panel and an inner panel integrally stamped.

[0064] When the door is closed, the door sealing strip 10 is installed in contact with the inner surface of the door outer panel 2d, which forms the outer panel of the vehicle, and the inner surface of the door inner panel 2e. The upper end of the door inner panel 2e is fixed to the upper end of the door outer panel 2d, which is located further outward than the door inner panel 2e, by means of a folding process.

[0065] The door sealing strip 10 has a mounting base 50, a hollow sealing part 52, and a lip 51. The lip 51 has a sealing lip 22 that abuts against the periphery 6 of the body opening, a door outer panel abutting part 54 that abuts against the door outer panel 2d, and a door inner panel abutting part 55 that abuts against the door inner panel 2e.

[0066] The mounting base 50 is disposed opposite to the inner door panel 2e, and has a recess 50a at this opposite position. A raised portion 59 is formed at the inner and outer ends of the recess 50a, and the raised portion 59 abuts against the inner door panel 2e. Furthermore, a hole 58 is formed in the mounting base 50, and it is secured by a clamp 80, for example made of resin, that passes through the mounting base 50 and the inner door panel 2e and clamps them together.

[0067] The hollow sealing portion 52 is structured such that it extends from the interior side of the mounting base 50 toward the periphery 6 of the vehicle body opening, and contacts the periphery 6 of the vehicle body opening when the door is closed to seal the interior and exterior of the vehicle. Furthermore, a first hollow portion 56 and a second hollow portion 57 are formed between the hollow sealing portion 52 and the mounting base 50.

[0068] A protrusion 23 is formed on the periphery 6 of the body opening at the front end 22a of the sealing lip 22, which abuts against the periphery 6 of the body opening when the door 1 is closed. A rigid portion 70 is formed extending from the area below the protrusion 23 toward the root 22b of the sealing lip 22. In this embodiment, the rigid portion 70 is not formed in the portion of the sealing lip 22 that undergoes significant deformation when the door 1 is opened or closed. Figure 5 Part C. Furthermore, in Figure 5 In this embodiment, the rigid part 70 is formed to be exposed on the inside of the vehicle, but it can also be formed in the same way as the first embodiment described above, not exposed on the inside of the vehicle but embedded in the sealing lip 22, or exposed on the outside of the vehicle.

[0069] Regarding the protrusion 23, from the viewpoint of preventing the root Z on the root side of the sealing lip 22 from bending, when the rigid part 70 is embedded in the sealing lip 22 and exposed to the outside of the vehicle, it is preferable that the distance between the rigid part 70 and the root Z of the protrusion 23 is less than or equal to half the thickness of the sealing lip 22.

[0070] The sealing lip 22 of the lip 51, the lip root 53 at the root of the outer door panel abutment 54 and the inner door panel abutment 55, are similar to the aforementioned rigid part 70, using a rigid EPDM (ethylene propylene diene rubber) material. The hardness of the rigid material is greater than or equal to the International Rubber Hardness (IRHD) 60.

[0071] On the other hand, the mounting base 50, the hollow sealing part 52, the sealing lip 22, the outer door panel abutment part 54, and the inner door panel abutment part 55 use soft EPDM sponge material. The specific gravity of the sponge material is greater than or equal to 0.4 and less than or equal to 1.0.

[0072] The rigid part 70 is not formed in the part where the sealing lip 22 deforms significantly when the door 1 is opened or closed. Figure 5 (Part C), thus the rigid part 70 can achieve the effect of the rigid part 70, that is, when the door frame 2 generates a force F1 towards the outside of the vehicle width direction (outside of the vehicle) due to the pressure difference between the inside and outside of the vehicle when the car is traveling at high speed, the rigid part 70 below the protrusion 23 reduces the deflection of the front end 22a of the sealing lip 22, and even if F2 increases, it can prevent the protrusion 23 from bending at the root Z on its root side, and can maintain the increase of F2 and prevent the door 1 from being difficult to close.

[0073] In this second embodiment, the rigid portion 70 is not formed in the portion where the sealing lip 22 deforms significantly when the door 1 is opened or closed. Figure 5 (of the C portion), but it can also be formed into a thinner form.

[0074] Next, based on Figure 6 The third embodiment of the present invention will be described. Figure 6 (a) is a view of the entire door sealing strip 10. Figure 6 (b) is Figure 6 (a) Enlarged view of part X. This third embodiment is a variation of the first embodiment. The parts described in the first embodiment are labeled with the same reference numerals. Furthermore, the descriptions of each part are omitted.

[0075] In the third embodiment, the rigid portion 70 is located on the root 22b side of the sealing lip 22 and is not formed in the portion of the sealing lip 22 that deforms significantly when the door 1 is opened or closed. Figure 6 (Part C). Furthermore, the portion of the sealing lip 22 that can significantly deform when the door 1 is opened and closed is formed relatively thin. Additionally, it is formed to protrude from the area below the protrusion 23 toward the root 22b of the sealing lip 22 and toward the inward side of the vehicle. Moreover, the thickness increases towards the front end 22a of the sealing lip 22, and below the protrusion 23, the rigid portion 70 is formed to bulge out in a shape resembling the letter D in the direction of the front end 22a of the sealing lip 22 and in the direction of the outer side of the sealing lip 22.

[0076] As a result, the deflection of the front end 22a of the sealing lip 22 can be reduced, the bending of the protrusion 23 at its root Z on the root side can be prevented, and the reaction force F2 in the area below the protrusion 23 can be increased. Therefore, even if the rigid part 70 is not formed in the part of the sealing lip 22 that deforms significantly when the door 1 is opened and closed, or is formed thinner than the front end 22a side of the sealing lip 22, the reaction force F2 can be made equal to or close to F1 as early as possible.

[0077] In this third embodiment, the rigid portion 70 is formed to protrude towards the inside of the vehicle, but it may also be formed to be embedded within the sealing lip 22. In the case of embedding, regarding the protrusion 23, from the viewpoint of preventing bending at the root Z on the root side of the sealing lip 22, it is preferable that the distance between the rigid portion 70 and the root Z of the protrusion 23 is less than or equal to half the thickness of the sealing lip 22.

[0078] Next, based on Figure 7 The fourth embodiment of the present invention will be described. Figure 7 (a) is a view of the entire door sealing strip 10. Figure 7 (b) is Figure 7(a) Enlarged view of part X. The door frame 2 used in this fourth embodiment is a concealed structure the same as in the first embodiment. The parts described in the first embodiment are labeled with the same reference numerals. Furthermore, the descriptions of each part are omitted.

[0079] like Figure 7 As shown, in this fourth embodiment, the rigid portion 70 includes the area near the root Z of the root 22b of the sealing lip 22 of the protrusion 23, and is formed across the sealing lip 22 in the direction of the front end portion 22a of the sealing lip 22, in the region from the inner side of the vehicle to the outer side of the vehicle. "Near the root Z of the root 22b of the sealing lip 22 of the protrusion 23" refers to the root 22b side to which the protrusion 23 does not bend at the root Z on its root side relative to the increase of F2.

[0080] By forming the rigid portion 70 over the entire range in the direction of the front end portion 22a from the root 22b side of the sealing lip 22 which is closer to the protrusion 23, the deflection of the front end portion 22a of the sealing lip 22 is extremely small, which can shorten the time for the reaction force F2 to be equal to or close to F1.

[0081] Furthermore, since the protrusion 23 does not bend at its root side relative to the increase of F2, the reaction force F2 can be increased to be equal to or close to F1. As a result, the door frame 2 can be prevented from being sucked outwards.

[0082] In this fourth embodiment, as Figure 7 As shown, a hard portion 70 is formed over the entire extent of the front end portion 22a of the sealing lip 22, but there may also be a portion of the front end portion 22a of the sealing lip 22 where the hard portion 70 is not formed.

[0083] Next, based on Figure 8 The fifth embodiment of the present invention will be described. Figure 8 (a) is a view of the entire door sealing strip 10. Figure 8 (b) is Figure 7 (a) Enlarged view of part X. This fifth embodiment is a variation of the fourth embodiment. The parts described in the first embodiment are labeled with the same reference numerals. Furthermore, the descriptions of each part are omitted.

[0084] In the fourth embodiment described above, the rigid portion 70 is mainly formed on the front end portion 22a side of the sealing lip 22. Therefore, the effect of the rigid portion 70 may decrease due to the deflection of the rigid portion 70 on the root portion 22b side of the sealing lip 22, which is closer to the rigid portion 70 than the root portion 22b side of the sealing lip 22.

[0085] In this fifth embodiment, the rigid portion 70 is formed to extend toward the root 22b side of the sealing lip 22. Specifically, the rigid portion 70 is formed over the entire extent in the front end portion 22a direction from the root 22b side of the sealing lip 22, which is closer to the protrusion 23 than the sealing lip 22 (as described in the fourth embodiment above), and is formed to protrude toward the vehicle interior side of the sealing lip 22. Alternatively, the extended portion may not protrude toward the vehicle interior side, but may be embedded within the sealing lip 22 and protrude toward the vehicle exterior side. Furthermore, the rigid portion 70 may not be formed in the portion of the sealing lip 22 that undergoes significant deformation when the door 1 is opened or closed. Figure 7 (The C portion), or formed in a thinner form.

[0086] As a result, the hard part 70 can be used to suppress the bending at the root Z of the protrusion 23 and the deflection of the sealing lip 22, so that the reaction force F2 can be made equal to or close to F1 as early as possible.

[0087] The hard portion 70 of the first, third, fourth and fifth embodiments can also be applied to the hard portion 70 of the second embodiment, and the hard portion 70 of the second embodiment can also be applied to the first, third, fourth and fifth embodiments.

[0088] When implementing this invention, it is not limited to the above-described embodiments. Various modifications can be made as long as they do not depart from the purpose of this invention.

[0089] For example, in the first embodiment and the third to fifth embodiments described above, the door sealing strip 10 integrates the outer sealing strip 20, the inner sealing strip 30, and the connecting portion 40 that connects the outer sealing strip 20 and the inner sealing strip 30. However, it may also be formed separately and installed separately without the connecting portion 40, or formed and installed only as in the second embodiment without the inner sealing strip 30.

[0090] For example, in the first to fifth embodiments described above, the door sealing strip 10 is formed from EPDM, but it can also be formed from olefin thermoplastic elastomer (TPO) or dynamically crosslinked thermoplastic elastomer (TPV).

[0091] For example, in the first to fifth embodiments described above, the rigid part 70 is formed using a rigid material of EPDM with an International Rubber Hardness (IRHD) greater than or equal to 60. However, it can also be formed from TPO, TPV, or resins such as PP.

[0092] Explanation of the label

[0093] 1. Car door

[0094] 2. Door frame

[0095] 6. Periphery of the body opening

[0096] 10 Door Sealing Strips

[0097] 11 Upper part

[0098] 20 vehicle exterior sealing strips

[0099] 21 Installation base

[0100] 22 Sealing Lip

[0101] 23 convex part

[0102] 60 door trim

[0103] 70 Hard Part

[0104] 56 High Friction Section

[0105] 60 door trim

Claims

1. A door sealing strip that seals the periphery of an opening between a car door and the vehicle body, and is installed on the outer periphery of the door frame, characterized in that... The door sealing strip has the following features: Mounting base, which is mounted on the door frame or door trim; and A sealing lip that abuts against the periphery of the vehicle body opening when the door is closed. On the periphery side of the vehicle body opening at the front end of the sealing lip, a protrusion is formed that abuts against the periphery of the vehicle body opening when the door is closed. In the sealing lip, a hard portion that is harder than the material constituting the sealing lip is formed, extending from the front end side of the protrusion toward the root side of the sealing lip, which is closer to the root side of the sealing lip than the root side of the sealing lip.

2. The door sealing strip according to claim 1, characterized in that, The rigid portion is not formed in the portion of the sealing lip that is significantly deformed when the door is opened or closed, or is formed thinner than the front end of the sealing lip.

3. The door sealing strip according to claim 1 or 2, characterized in that, The rigid portion is formed on the front end side of the sealing lip, and is provided to extend further toward the front end of the sealing lip and toward the outer side of the sealing lip.

4. A door sealing strip that seals the periphery of an opening between a car door and the vehicle body, and is installed on the outer periphery of the door frame, wherein... The door sealing strip has the following features: Mounting base, which is mounted on the door frame or door trim; and A sealing lip that abuts against the periphery of the vehicle body opening when the door is closed. On the periphery side of the vehicle body opening at the front end of the sealing lip, a protrusion is formed that abuts against the periphery of the vehicle body opening when the door is closed. In the sealing lip, a hard portion harder than the material constituting the sealing lip includes the protrusion and the vicinity of the root of the root side of the sealing lip of the protrusion, which traverses the sealing lip in the direction of the front end of the sealing lip and is formed in the region from the inside of the vehicle to the outside of the vehicle.

5. The door sealing strip according to claim 4, wherein, The rigid portion is formed near the root side of the sealing lip, which includes the protrusion.

6. The door sealing strip according to claim 4, wherein, The rigid portion is formed to extend toward the root side of the sealing lip.

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