Side seat safety airbag cavity and automobile seat
By incorporating weakened sections and filling tear sections within the foam body, the problem of balancing the expansion and deployment of the side airbag with the appearance quality of the foam body is solved, achieving a faster and wider range of protection.
Patent Information
- Application Number
- CN202510636965.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-18
- Publication Date
- 2025-08-01
AI Technical Summary
In existing technologies, the tear channel of the side airbag cannot simultaneously ensure rapid expansion and deployment while maintaining the appearance quality of the foam body. This can easily lead to excessive amounts of debris from the tearing of the foam body, affecting the safety protection effect for occupants.
A weakening section and a filling tear section are set in the foam body. The weakening section is connected to the airbag cavity, and the filling tear section is located between the outer wall of the tear channel and the weakening section. Together with the tear channel, it provides guidance to ensure that the side airbag expands and deploys rapidly.
It improves the speed and range of side airbag inflation and deployment, providing greater occupant protection, while avoiding a decline in the appearance quality of the foam body, enhancing safety and the smoothness of the protective covering.
Smart Images
Figure CN120396882A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of side airbag protection structures for vehicle seats, and particularly to a side chair airbag cavity and a vehicle seat. Background Art
[0002] With the continuous improvement of vehicle safety performance, more and more vehicles are provided with airbag structures on the sides of seats. When a vehicle undergoes a side collision, the side airbag of the seat detonates and rapidly expands to protect the sides of passengers. Currently, when setting up the side airbag structure, a cover is wrapped outside the backrest frame, and a foam body is fixed between the cover and the backrest frame. An airbag cavity is formed inside the foam body, and the side airbag is installed in the airbag cavity. To facilitate the directional expansion of the side airbag outside the side of the seat, a tear line is provided on the cover. The tear line is located on the side of the front of the seat back close to the outside of the vehicle body, and a tear channel matching the tear line is provided on the foam body. The tear channel is interconnected with the airbag cavity, and the tear channel provides guidance for the expansion of the side airbag to avoid damage to other surrounding components when the side airbag expands and improves the safety protection effect on vehicle occupants.
[0003] Although the method of setting a tear channel on the foam body can play a guiding role in the expansion of the side airbag, when setting the tear channel, it is necessary to limit the width of the tear channel to avoid the appearance of the foam body being affected due to an overly large width of the tear channel. Especially when a cover is wrapped outside the foam body, it can prevent the cover from collapsing and affecting the appearance quality of the product. However, in order to enable the side airbag to expand rapidly after detonation, setting a larger width and a longer tear channel helps the side airbag to expand rapidly and directionally. Therefore, if the tear channel is too small during actual setting, the side airbag is likely to tear the foam body everywhere during expansion, resulting in an excessive amount of flying debris. Therefore, it is necessary to improve the existing tear structure to balance the tear effect of the foam body and the appearance quality. Summary of the Invention
[0004] The present invention aims to provide a side chair airbag cavity and a vehicle seat to solve the problem in the prior art that the tear channel provided on the foam body cannot balance the tear effect and the appearance quality of the foam body.
[0005] To solve the above problems, the present invention adopts the following technical solution: A side chair airbag cavity includes a foam body and an airbag cavity provided inside the foam body. A tear channel communicating with the airbag cavity is provided outside the foam body. A weakening portion communicating with the airbag cavity is further provided inside the foam body. The weakening portion is located at one end or both ends of the tear channel. A filling and tearing portion is provided between the outer sidewall of the tear channel provided on the foam body and the weakening portion.
[0006] The principle and beneficial effects of this solution are as follows: In this application, the airbag cavity is used to install the side airbag in the prior art. A tearing channel communicating with the airbag cavity is arranged on the outer side of the foam body. The tearing channel provides guidance for the expansion and deployment of the side airbag to ensure that the side airbag accurately pops out laterally from the foam body to protect the occupant's side.
[0007] Meanwhile, in this application, a weakening part is also arranged in the foam body. The weakening part communicates with the airbag cavity, and a filling and tearing part is arranged between the weakening part and the outer side wall of the foam body. When the side airbag in the prior art expands and deploys in the airbag cavity, the side airbag can not only tear the foam body along the tearing channel, so that the side airbag quickly expands outside the foam body to play a protective role; at the same time, when the side airbag expands and deploys, a part of the side airbag can also enter the weakening part. Under the expansion extrusion of the side airbag, the filling and tearing part is torn, so that the side airbag expanding into the weakening part expands outside the foam body from the space torn by the filling and tearing part. And the filling and tearing part is located between the outer side wall of the foam body where the tearing channel is arranged and the weakening part. Therefore, when the side airbag expanding into the weakening part expands outside the foam body, it is on the same side of the foam body as the side airbag expanding out of the tearing channel. Therefore, the side airbag expanding from the weakening part can also play a safety protection role for the vehicle occupants.
[0008] In this application, after the weakening part is set, the tearing channel and the weakening part can simultaneously play a guiding role in the expansion and deployment of the side airbag. Without affecting the appearance of the foam body, the expansion space of the side airbag is effectively increased, and the side airbag can expand and deploy more quickly to play a more timely protective role for the occupant; in addition, compared with the method of only setting the tearing channel, in this application, the side airbag can not only expand outside the foam body from the tearing channel, but also expand outside the foam body from the filling and tearing part. The area of the side airbag expanding out of one side of the foam body is larger, which can provide a larger range of protection for the occupant and play a better protective effect.
[0009] Since the filling and tearing part is located between the outer side wall of the foam body and the weakening part, on the premise of ensuring that part of the side airbag can expand and deploy from the weakening part and the filling and tearing part, at other times when the side airbag does not expand, the filling and tearing part can play a role in shielding and protecting the weakening part. And when the protective cover in the prior art is covered on the outer side of the foam body, the filling and tearing part can play an auxiliary supporting role for the protective cover, thus avoiding the defect of the protective cover collapsing.
[0010] Preferably, as an improvement, the weakening part includes a weakening groove. The length range of the weakening groove is 30 - 60 mm, the width is greater than or equal to 15 mm, and the height range is 2 - 3 mm.
[0011] In this solution, the weakening part is a weakening groove with a groove-like structure, which can conveniently form a weakening groove in the foam body. In this solution, the length of the weakening groove is set to 30 - 60 mm, the width is greater than or equal to 15 mm, and the height range is 2 - 3 mm, so that the weakening groove can play a good guiding role for the side airbag.
[0012] Preferably, as an improvement, the filling and tearing part is integrally formed with the foam body. The outer side of the filling and tearing part is flush with the outer side of the foam body, and the inner side is the side wall of the weakening groove. The width range of the filling and tearing part is 8 - 35 mm.
[0013] In this solution, the filling and tearing part is integrally formed with the foam body, and the outer side of the filling and tearing part is flush with the outer side wall of the foam body, so that the filling and tearing part can support the cover wrapped around the foam body. At the same time, the width range of the filling and tearing part is set to 8 - 35 mm. The width range of the filling and tearing part is appropriate, which can not only effectively support the cover outside the foam body, but also tear the foam body by the filling and tearing part after the side airbag expands to the weakening part, so that the side airbag in the weakening part can be smoothly deployed outside the foam body.
[0014] Preferably, as an improvement, a rotating shaft fitting hole is provided at the bottom end of the foam body. The number of weakening grooves is two, and the two weakening grooves are respectively located at both ends of the tearing channel, and the airbag cavity and the weakening groove close to the rotating shaft fitting hole are both communicated with the rotating shaft fitting hole.
[0015] In this solution, the weakening groove close to the rotating shaft fitting hole is communicated with the rotating shaft fitting hole, and the airbag cavity is also communicated with the rotating shaft fitting hole. When the side airbag expands and deploys, not only can it tear the foam body under the guidance of the tearing channel, but also a part of the side airbag will enter the two weakening grooves, and close to the bottom end position of the foam body, part of the side airbag will also enter the weakening groove and the communication cavity between the airbag cavity and the rotating shaft fitting hole, increasing the initial expansion and deployment range of the side airbag, which is beneficial to the side airbag to expand and deploy more quickly and efficiently to play a protective role.
[0016] Preferably, as an improvement, the draft angle of the bottom wall of the airbag cavity is 3 - 5°, and the high side of the bottom wall of the airbag cavity is connected to the weakening groove close to the rotating shaft fitting hole.
[0017] During conventional molding, the draft angle is set to 0.5 - 3°. In this solution, the draft angle of the bottom wall of the airbag cavity is set to a larger 3 - 5°. The slope of the bottom wall of the airbag cavity is larger, which not only facilitates the demolding of the airbag cavity mold, but more importantly, the high side of the bottom wall of the airbag cavity is connected to the weakening groove near the shaft mating hole. When the side airbag expands and unfolds in the airbag cavity, the bottom wall of the airbag cavity can guide the expansion and unfolding of the side airbag, enabling the side airbag to expand and unfold rapidly towards the weakening groove near the shaft mating hole when expanding towards the tearing channel, so that the side airbag can expand and unfold quickly to protect the occupants.
[0018] More importantly, due to the special structure of the airbag cavity in the prior art, a core-pulling structure needs to be set during the molding of the airbag cavity. There is an opening on the foam body. After the molding of the foam body is completed, the opening of the foam body is manually expanded (the foam body undergoes elastic deformation and the structure of the foam body will not be damaged when the opening is expanded), and then the core-pulling structure is taken out of the foam body through the opening. In this solution, after the weakening groove is set at the bottom end of the foam body, since the weakening groove and the shaft mating hole are interconnected, when the opening of the foam body is expanded, the connecting groove between the weakening groove and the shaft mating hole can assist the opening to be expanded more labor-savingly, and the foam body is not easily torn and damaged during the expansion process, making the demolding process of the core-pulling structure more labor-saving and convenient.
[0019] Preferably, as an improvement, the height of the weakening groove decreases along the direction away from the airbag cavity.
[0020] In this solution, the height of the weakening groove gradually decreases along the direction away from the airbag cavity, making the entire weakening groove form a notch with an opening facing the airbag cavity. When the side airbag expands to the weakening groove, along the direction away from the airbag cavity, the size of the weakening groove gradually decreases, enabling the side airbag to expand towards the filling and tearing direction, controlling the orientation of the expansion of the side airbag; at the same time, the weakening groove is in the form of a notch with an opening facing the airbag cavity, facilitating the demolding of the mold for forming the weakening groove.
[0021] Preferably, as an improvement, a connecting portion is integrally formed on the tearing channel, and the connecting portion divides the side of the tearing channel close to the outside of the foam body into several tearing openings.
[0022] In this solution, a connecting part is integrally formed on the tearing channel. The connecting part is located inside the tearing channel or one side of the connecting part protrudes outside the tearing channel. The connecting part can play an auxiliary supporting role for the protective surface outside the foam body. Combining the auxiliary support of the filling and tearing force for the protective surface, the flatness of the appearance of the protective surface can be effectively ensured when covering the protective surface. After the connecting part is set, one side of the original tearing channel close to the outside of the foam body is separated into several tearing openings, while the side close to the airbag cavity of the original tearing channel still remains in a mutually connected state, that is, the connecting part is located on one side of the tearing channel close to the outside of the foam body, and the tearing openings remain in communication with the airbag cavity. When the side airbag in the airbag cavity detonates and expands, the tearing openings can also play a guiding role in the expansion and deployment of the side airbag. Therefore, by adopting the technical solution of this application, while ensuring the guiding of the expansion and deployment of the side airbag, the flatness of the protective surface covering can be improved, and defects such as collapse during the covering of the protective surface can be avoided.
[0023] In addition, in this solution, the connecting part and the foam body are integrally formed. The connecting part is formed simultaneously when the foam body is formed. Not only is the forming efficient, but the connection between the connecting part and the foam body is stable. At the same time, due to the existence of the connecting part, the originally long strip-shaped tearing channel is separated into multiple tearing openings. The connecting part can serve as a filling channel for the forming material when the foam body is formed, enabling the foam material to be filled more quickly and fully, effectively reducing the defect of material shortage during the forming of the foam body, and improving the forming quality of the foam body.
[0024] Preferably, as an improvement, a recessed part is provided on the outside of the connecting part and is recessed into the foam body.
[0025] In this solution, by providing the recessed part, the structural strength of the connecting part integrally formed on the foam body is lower than that of the foam body. Thus, when the side airbag expands and deploys, in addition to the tearing openings being able to play a guiding role, the connecting part is more quickly and effectively separated from the foam body under the action of the expansion extrusion force of the side airbag, and can also play an effective guiding role in the expansion and deployment of the side airbag. Moreover, since the recessed part is recessed into the foam body, the recessed part can be conveniently formed when the connecting part is integrally formed.
[0026] Preferably, as an improvement, the recessed part includes a concave groove integrally formed on the connecting part, and the concave groove is arranged along the extending direction of the connecting part.
[0027] In this solution, the recessed part is a concave groove integrally formed on the connecting part, and the concave groove is arranged along the extending direction of the connecting part. The structure is simple and the forming is convenient, and the concave groove is in a continuous state along the extending direction of the connecting part. When the side airbag expands and deploys, the concave groove together with the connecting part can quickly and completely break and play a full guiding role for the side airbag.
[0028] Preferably, as an improvement, the thickness of the connecting part is D, where 3 mm ≤ D ≤ 6 mm, the depth of the concave groove is T, where 1.5 mm ≤ T < (1 / 2 * D) mm, and the length of the tear opening is greater than or equal to 40 mm.
[0029] In this solution, the thickness of the connecting part is controlled within the range of 3 - 6 mm, effectively ensuring the structural strength of the connecting part, enabling the connecting part to play a stable auxiliary supporting role for the facing, and at the same time avoiding the excessive thickness of the connecting part from affecting the expansion and deployment guiding function of the side airbag on the opposite side; at the same time, the depth of the concave groove is set to be greater than or equal to 1.5 mm and less than half of the thickness of the connecting part, so that the concave groove effectively reduces the structural strength at the position of the connecting part, so that when the side airbag expands and deploys, it can quickly tear the foam body from the tear opening and the position of the connecting part. In addition, the length of the tear opening is set to be greater than or equal to 40 mm to ensure that the tear opening has a long length, so that it can be quickly torn to play a guiding role when the side airbag expands and deploys.
[0030] An automotive seat includes the side chair airbag cavity described above.
[0031] In this solution, by arranging the side chair airbag cavity in the automotive seat, without affecting the covering appearance quality of the facing outside the foam body, the expansion and deployment speed of the side airbag can be increased, thereby playing a more efficient safety protection role for the occupant, and the expansion and deployment area of the side airbag is larger, further enhancing the protection effect on the occupant. BRIEF DESCRIPTION OF THE DRAWINGS
[0032] Figure 1 It is a schematic diagram of the foam body in the first embodiment of the present invention.
[0033] Figure 2 It is a schematic diagram of another perspective of the foam body in the first embodiment of the present invention.
[0034] Figure 3 is Figure 1 a cross-sectional view taken along A - A in
[0035] Figure 4 is Figure 3 a partial enlarged view at C in
[0036] Figure 5 is Figure 1 a cross-sectional view taken along B - B in
[0037] Figure 6 is Figure 5 a schematic diagram after installing the side airbag in
[0038] Figure 7 It is a schematic diagram of installing the foam reinforcement cloth on the foam body in the first embodiment of the present invention.
[0039] Figure 8 Same as the local enlarged view at position C in the second embodiment of the present invention Figure 3 in
[0040] Figure 9 Schematic diagram of setting two connecting parts on the foam body in the third embodiment of the present invention Specific embodiments
[0041] The following is a further detailed description through specific embodiments: The reference numerals in the accompanying drawings of the specification include: foam body 1, airbag cavity 101, bottom wall 1011, tearing channel 102, tearing opening 1021, filling and tearing part 103, guiding rounded corner 1031, weakening groove 104, rotating shaft fitting hole 105, opening 106, notch 107, connecting part 108, concave groove 1081, side airbag 2, and foam reinforcing cloth 3
[0042] Embodiment 1 As shown in the attached Figure 1 and Figure 3 : A side chair airbag cavity type, including a foam body 1 and an airbag cavity 101 arranged inside the foam body 1. The airbag cavity 101 can be formed by integral molding or other methods. Combining Figure 6 , the side airbag 2 in the prior art is installed and placed inside the airbag cavity 101. Combining Figure 1 , Figure 3 and Figure 5 , a tearing channel 102 communicating with the airbag cavity 101 is provided on the outer side wall of the foam body 1. The tearing channel 102 extends along the length direction of the foam body 1 (i.e., Figure 1 the left - right direction in
[0043] ), and the tearing channel 102 is located on the side of the front side of the foam body 1 close to the outside of the vehicle body. When the side airbag 2 expands and unfolds, due to the existence of the tearing channel 102, under the expansion and extrusion force of the side airbag 2, the foam body 1 can be quickly torn along the extension direction of the tearing channel 102, so that the side airbag 2 quickly expands and unfolds to the side of the foam body 1 close to the outside of the vehicle body, thereby playing a lateral protection role for the vehicle occupants Figure 1 , Figure 3 and Figure 5 , a weakening part communicating with the airbag cavity 101 is further provided inside the foam body 1. The weakening part is located at one or both ends of the tearing channel 102. A filling and tearing part 103 is provided between the outer side wall of the foam body 1 where the tearing channel 102 is provided and the weakening part. The filling and tearing part 103 is also provided on the foam body 1 by integral molding, and the outer side of the filling and tearing part 103 is flush with the outer side wall of the foam body 1 where the tearing channel 102 is provided, and the inner side is a side wall of the weakening groove 104
[0044] The weakening part in this embodiment includes a weakening groove 104 formed in the foam body 1 by an integral molding method, and the number of the weakening grooves 104 is two. The two weakening grooves 104 are respectively located at both ends of the tearing channel 102. Combining Figure 2 and Figure 5 , a rotating shaft fitting hole 105 and a notch 107 are formed at the bottom end of the foam body 1 (i.e., the left end in Figure 1 ). The airbag cavity 101 and the weakening groove 104 near the rotating shaft fitting hole 105 are mutually communicated with the rotating shaft fitting hole 105 at the same time. By setting two weakening grooves 104 in this solution, the initial space for the side airbag 2 to expand and deploy is maximally improved, and both of the two weakening grooves 104 can play a role in guiding and tearing the expansion and deployment of the side airbag 2; in addition, since the airbag cavity 101 and the weakening groove 104 near the bottom end of the foam body 1 are mutually communicated with the rotating shaft fitting hole 105 at the same time, on the one hand, when the side airbag 2 expands and deploys, it can also expand and deploy in the direction of the communication groove between the airbag cavity 101 and the rotating shaft fitting hole 105, increasing the expansion and deployment range of the side airbag 2, enabling the side of the foam body 1 to be torn more quickly, and further reducing the situation that the foam body 1 splashes everywhere during the tearing process, avoiding the over-standard of splashes; on the other hand, due to the special structure of the airbag cavity 101, a core-pulling structure needs to be set when forming the side airbag 2. An opening 106 is provided on the side of the foam body 1. During the demolding stage after molding, it is necessary to manually expand the foam body 1. The foam body 1 undergoes elastic deformation to increase the opening 106, and then the core-pulling structure is taken out from the inside of the foam body 1. Since a weakening groove 104 is additionally provided at a position near the rotating shaft fitting hole 105 in this embodiment and the weakening groove 104 is communicated with the rotating shaft fitting hole 105, when manually expanding the foam body 1 to take out the core-pulling structure, the foam body 1 can be expanded more conveniently and labor-savingly, making the demolding of the core-pulling structure more convenient.
[0045] Combining Figure 3 and Figure 5, a connecting portion 108 is fixedly connected to the tearing channel 102. The connecting portion 108 divides the position of the tearing channel 102 close to the outside of the foam body 1 along the length direction of the tearing channel 102 into a plurality of tearing openings 1021. In this embodiment, the number of the connecting portions 108 is one. The connecting portion 108 is integrally formed with the foam body 1, and the connecting portion 108 divides the portion of the tearing channel 102 close to the outside of the foam body 1 into two tearing openings 1021. The two tearing openings 1021 are respectively located at both ends of the tearing channel 102. The side of the tearing channel 102 close to the airbag cavity 101 is still in a communicating state. Both ends of the connecting portion 108 are provided with rounded corners. Since the connecting portion 108 divides the side of the tearing channel 102 close to the foam body 1 into two tearing openings 1021, when the vehicle is laterally impacted by the outside world and causes the side airbag 2 to expand, the position where the tearing channel 102 and the connecting portion 108 are provided on the foam body 1 is quickly torn, so that the side airbag 2 can quickly expand to the side of the foam body 1 close to the vehicle body, playing a protective role for the vehicle occupants laterally.
[0046] Combined with Figure 3 、 Figure 4 and Figure 5 , when setting the dimensions of each structure, the length range of the weakening groove 104 is 30-60 mm, the width is greater than or equal to 15 mm, and the height range is 2-3 mm. The length S of the weakening groove 104 is preferably 35 mm, the width Z is preferably 60 mm, and the height H is preferably 2.5 mm; the width E of the filling and tearing portion 103 ranges from 8 to 35 mm. Among the two filling and tearing portions 103, the width E1 of the filling and tearing portion 103 (i.e., the filling and tearing portion 103 on the right side in Figure 3 ) close to the top of the foam body 1 ranges from 8 to 12 mm, preferably 8 mm, and the width E2 of the other filling and tearing portion 103 ranges from 30 to 35 mm, preferably 35 mm. The filling and tearing portion 103 is connected to the tearing opening 1021, and a guiding rounded corner 1031 is provided at one end of the filling and tearing portion 103 close to the tearing opening 1021. The thickness of the connecting portion 108 is D, 3 mm ≤ D ≤ 6 mm, preferably 4 mm. The length L of the tearing opening 1021 ranges from 30 to 40 mm, preferably 32 mm; at the same time, in this solution, the draft angle range of the bottom wall 1011 of the airbag cavity 101 is 3-5°, preferably 4°. In this embodiment, the thickness of the connecting portion 108 is set to 4 mm, so that the structural strength of the connecting portion 108 is moderate. It can not only play an auxiliary supporting effect on the surface covering the outside of the foam body 1 in the prior art, make the surface covering more flatly covered, improve the appearance quality, but also avoid the excessive strength caused by the excessive thickness of the connecting portion 108, so as to prevent the expansion of the side airbag 2 from being hindered, and effectively ensure the guiding effect of the tearing channel 102 and the tearing opening 1021 on the expansion process of the side airbag 2.
[0047] Such asFigure 7 As shown in the figure, an automotive seat includes the side chair airbag cavity described above. A foam reinforcement cloth 3 is connected to the foam body 1, and the side airbag 2 is installed in the airbag cavity 101. In this solution, a tearing channel 102 and a weakening groove 104 are provided on the foam body 1, providing a larger expansion space for the expansion of the side airbag 2. After the side airbag 2 detonates, it can quickly expand towards the weakening groove 104 and the tearing channel 102, and then tear the foam body 1 along the tearing channel 102 and the filling and tearing part 103, and finally quickly expand outside the foam body 1 to protect the occupants. In addition, in this solution, by setting the connecting part 108 and the filling and tearing part 103, while improving the guiding effect on the expansion and deployment of the side airbag 2, the openings 106 on the foam body 1 are also reduced. When the upholstery covers the outside of the foam body 1, it is very flat and has a good appearance. The setting of the connecting part 108 can promote the flow of the molding material during the molding of the foam body 1, enabling the molding material to be poured and filled more quickly and fully, effectively improving the molding quality of the foam body 1.
[0048] Embodiment 2 The difference between Embodiment 2 and Embodiment 1 is that: as Figure 8 shown in the figure, a recessed part is provided on the outside of the connecting part 108 and is recessed into the foam body 1. The recessed part is a recessed groove 1081 integrally formed on the connecting part 108. The recessed groove 1081 is arranged along the length extension direction of the connecting part 108. The cross-sectional shape of the recessed groove 1081 is one of an arc, a triangle, and a quadrilateral. In this embodiment, the cross-section of the recessed groove 1081 is circular arc-shaped, and the two ends of the arc of the recessed groove 1081 are smoothly transitioned with the connecting part 108. When setting the recessed groove 1081 in this embodiment, the depth of the recessed groove 1081 is T, where 1.5 mm ≤ T < (1 / 2 * D) mm, preferably 2 mm. By setting the depth of the recessed groove 1081 to 2 mm, the strength of the connecting part 108 is reduced after the recessed groove 1081 is set. When the connecting part 108 is subjected to the expansion extrusion of the inner side airbag 2, it can be torn more quickly, and the side airbag 2 can tear the foam body 1 from the connecting part 108 more quickly, enabling the side airbag 2 to quickly and accurately expand to the side of the foam body 1 close to the outside of the vehicle body to play a protective role.
[0049] Embodiment 3 The difference between Embodiment 3 and Embodiment 1 is that: in Embodiment 1, the number of connecting parts 108 is one, and the side of the tearing channel 102 close to the outside of the foam body 1 is divided into two tearing openings 1021, as Figure 9As shown, in this embodiment, the number of the connecting portions 108 is two, and the two connecting portions 108 divide the side of the tearing channel 102 close to the outside of the foam body 1 into three tearing openings 1021. Two of the tearing openings 1021 are located at the ends of the tearing channel 102, and the other tearing opening 1021 is located at the middle position of the tearing channel 102. When the side airbag 2 expands and unfolds, the foam body 1 can be torn more quickly along the tearing channel 102, playing a guiding role in the expansion and unfolding of the side airbag 2.
[0050] Embodiment Four The difference between Embodiment Four and Embodiment Three lies in that: in this embodiment, the height of the weakening groove 104 gradually decreases along the direction away from the airbag cavity 101, so that the weakening groove 104 forms a notch facing the airbag cavity 101. Such a setting not only facilitates the demolding of the mold structure for forming the weakening groove 104, but also the notch structure of the weakening groove 104 can play a more stable guiding role in the expansion and unfolding of the side airbag 2, enabling the side airbag 2 to tear the foam body 1 more stably and efficiently and expand outside the foam body 1.
[0051] The above are only the embodiments of the present invention. Specific technical solutions and / or common knowledge such as characteristics known to the public are not described in detail here. It should be pointed out that for those skilled in the art, without departing from the technical solution of the present invention, several deformations and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the implementation effect of the present invention and the practicality of the patent. The protection scope required by this application should be based on the content of its claims, and the specific implementation manners in the specification can be used to explain the content of the claims.
Claims
1. A side chair airbag cavity, comprising a foam body and an airbag cavity provided in the foam body, and a tear channel communicating with the airbag cavity is provided outside the foam body, characterized in that: A weakening part communicating with the airbag cavity is further arranged in the foam body. The weakening part is located at one or both ends of the tearing channel, and a filling and tearing part is arranged between the outer side wall of the foam body where the tearing channel is arranged and the weakening part.
2. The side chair airbag cavity according to claim 1, wherein: The weakening part includes a weakening groove. The length range of the weakening groove is 30 - 60 mm, the width is greater than or equal to 15 mm, and the height range is 2 - 3 mm.
3. The side chair airbag cavity according to claim 2, wherein: The filling and tearing part is integrally formed with the foam body. The outer side of the filling and tearing part is flush with the outer side of the foam body, and the inner side is the side wall of the weakening groove. The width range of the filling and tearing part is 8 - 35 mm.
4. A side chair airbag cavity according to claim 2, wherein: A rotating shaft fitting hole is arranged at the bottom end of the foam body. The number of the weakening grooves is two, and the two weakening grooves are respectively located at both ends of the tearing channel. The airbag cavity and the weakening groove close to the rotating shaft fitting hole are both communicated with the rotating shaft fitting hole.
5. A side chair airbag cavity according to claim 2, characterized in that: The draft angle of the bottom wall of the airbag cavity is 3 - 5°, and the high side of the bottom wall of the airbag cavity is connected to the weakening groove close to the rotating shaft fitting hole.
6. The side chair airbag cavity according to claim 2, characterized in that: The height of the weakening groove decreases along the direction away from the airbag cavity.
7. A side chair airbag cavity according to claim 1, characterized in that: A connecting part is integrally formed on the tearing channel. The connecting part divides the side of the tearing channel close to the outer side of the foam body into several tearing openings.
8. The side chair airbag cavity according to claim 7, characterized in that: A recessed part recessed into the foam body is arranged on the outer side of the connecting part. The recessed part includes a concave groove integrally formed on the connecting part, and the concave groove is arranged along the extending direction of the connecting part.
9. The side chair airbag cavity according to claim 8, characterized in that: The thickness of the connecting part is D, where 3 mm ≤ D ≤ 6 mm. The depth of the concave groove is T, where 1.5 mm ≤ T < (1 / 2 * D) mm. The length range of the tearing opening is 30 - 40 mm.
10. An automotive seat, characterized in that: It includes a side chair airbag cavity type as described in any one of claims 1 - 9.