A roof for preventing flying objects during side curtain blasting and a manufacturing method thereof

Abstract

The present invention discloses a roof that prevents splashing during a side curtain explosion and a manufacturing method thereof, relating to the field of vehicle roof structures. The roof body includes a roof body, which includes a surface finishing layer and a base material layer. A lower shell is provided on the side of the base material layer facing away from the surface finishing layer. The lower shell is fixedly provided with an upper shell for connecting to the vehicle sheet metal. A weakened portion is provided between the upper shell and the lower shell. The weakened portion is used to reduce the connection strength between the upper shell and the lower shell. When an external force is generated between the upper shell and the lower shell to push the upper shell and the lower shell apart, and the magnitude of the external force exceeds the tolerance range of the weakened portion, the upper shell and the lower shell separate with the weakened portion as the center. A buffer connector is provided between the lower shell and the upper shell. When the upper shell and the lower shell separate from each other, the buffer connector is used to cushion the upper shell and the lower shell and limit the distance between the upper shell and the lower shell after separation. The present invention has the effect of improving the stability of the roof installation while facilitating the removal of the side curtain airbag.

Description

Technical Field

[0001] The present invention relates to the field of automotive ceiling structures, and more particularly to a ceiling that prevents splashes during side curtain blasting and a manufacturing method thereof. Background Art

[0002] The automotive ceiling is an important component in the vehicle structure. It not only plays a decorative role but also has good sound insulation and heat insulation effects. The related technology can refer to the Chinese patent with the publication number CN215322878U, which discloses a strengthened structure for the ceiling of a new energy vehicle. It includes a ceiling main body. The inner surface of the ceiling main body is provided with a front reading lamp hole, four sun visor holes, four handle holes, and a rear reading lamp hole. The outer surface of the ceiling main body is provided with two B-pillar notches. The outer surface of the sound insulation layer is fixedly installed with a foam layer. The inner surface of the ceiling main body is provided with a sunroof hole.

[0003] The side curtain, also known as the side airbag, is a safety protection device installed between the ceiling and the vehicle frame. During driving, when the vehicle encounters a collision or other situations, the side airbag needs to be ejected from inside the ceiling to protect the safety of the driver and passengers. With the development of the economy, people's requirements for cars are not just a means of transportation. The requirement for the aesthetics of the interior is getting higher and higher. A simple interior layout is an aesthetic pursuit of people. To meet this aesthetic trend, more and more configurations of safety handles on the ceiling are cancelled. This results in the ceiling lacking a rigid fixing point at the handle position, leading to the situation of the ceiling falling off and splashing during blasting.

[0004] In view of the above-mentioned related technology, in order to solve the problem that the ceiling is prone to falling off during side airbag blasting, the conventional method is to increase brackets for screw fixing or snap fixing. However, if screw fixing is used, since the bracket is rigidly fixed, it will limit the detachment of the ceiling from the vehicle sheet metal during side airbag blasting, easily causing the side airbag to be unable to open smoothly or not be fully opened within the specified time during the detachment process, so that when an accident occurs to the vehicle, the side airbag cannot protect the safety of the driver and passengers well. If snap fixing is used, due to the large impact force generated during side airbag blasting, it is extremely easy to cause the snap fixing to fail and the snap to come off and splash, causing harm to passengers and drivers. Therefore, there is an urgent need for a ceiling structure that improves the installation stability of the ceiling while facilitating the ejection of the side airbag. Summary of the Invention

[0005] In order to improve the installation stability of the ceiling while facilitating the ejection of the side airbag, the present application provides a ceiling that prevents splashes during side curtain blasting and a manufacturing method thereof.

[0006] In a first aspect, the present application provides a ceiling that prevents splashes during side curtain blasting, adopting the following technical solution:

[0007] A ceiling for preventing splashes during side curtain explosions comprises a ceiling body, the ceiling body comprising a surface finishing layer and a base material layer, the base material layer being fixedly connected to the surface finishing layer and being used to be connected to automobile sheet metal, a lower shell being fixedly provided on the side of the base material layer facing away from the surface finishing layer, an upper shell being provided on the side of the lower shell facing away from the base material layer for connecting to automobile sheet metal, the upper shell being fixedly connected to the lower shell, and a weakened portion being provided between the upper shell and the lower shell, the weakened portion being used to reduce the connection strength between the upper shell and the lower shell, when an external force is generated between the upper shell and the lower shell to push the upper shell and the lower shell to separate, and the magnitude of the external force exceeds the bearing range of the weakened portion, the upper shell and the lower shell are separated with the weakened portion as the center, a buffer connection is provided between the lower shell and the upper shell, and when the upper shell and the lower shell are separated from each other, the buffer connection is used to buffer the force between the upper shell and the lower shell, and to limit the distance between the upper shell and the lower shell after separation.

[0008] By adopting the above technical solution, the roof body is connected to the vehicle's sheet metal via an upper shell and a lower shell. The surface finish enhances the roof body's decorative effect. The side curtain airbags are installed between the roof body and the vehicle's sheet metal. When the side curtain airbags explode, they push the roof body away from the vehicle's sheet metal, causing the roof body to exert a pulling force on the lower shell away from the upper shell. In the initial state, the upper and lower shells are connected by a weakened portion. When the side curtain airbags explode, the upper and lower shells separate along the weakened portion, separating the roof body from the vehicle's sheet metal and allowing the side curtain airbags to be released smoothly. When the upper and lower shells separate to a predetermined distance, the upper shell tightens the lower shell in place via a buffer connector, preventing the roof body from further detaching, reducing the probability of the roof body striking and injuring the driver. This improves the stability of the roof installation while also making the side curtain airbags easier to release.

[0009] Optionally, an installation cavity is opened on the side of the upper shell close to the lower shell, a fixing bolt is provided in the installation cavity, a cavity connected to the installation cavity is provided inside the lower shell, and a through opening connected to the cavity is opened on the ceiling body, and the fixing bolts pass through the through opening of the ceiling body and the lower shell in sequence, and are threadedly connected to the automobile sheet metal through the upper shell, and a decorative cover plate is abutted on the side of the surface finishing layer away from the base material layer, and a plurality of claws are provided on the side of the decorative cover plate close to the surface finishing layer, and a plurality of card interfaces connected to the cavity are opened along the circumferential direction of the lower shell, and the claws correspond to the card interfaces one by one, and the claws pass through the through opening and extend into the cavity, and are clamped with the lower shell through the corresponding card interfaces.

[0010] By adopting this technical solution, the fixing bolts push the upper shell into contact with the vehicle sheet metal, thereby connecting the upper shell and the vehicle sheet metal. The opening, cavity, and installation cavity provide space for the operator to install and remove the fixing bolts. In the initial state, when the claws are located in the locking interface, the decorative cover plate fits with the surface layer, thereby shielding and modifying the opening of the ceiling body. This improves the connection strength between the lower shell and the ceiling body while reducing the possibility of foreign matter entering the gap between the ceiling and the vehicle sheet metal.

[0011] Optionally, a pre-connection structure is further provided on the side of the decorative cover plate close to the surface finishing layer, the ceiling body is provided with a mounting hole corresponding to the pre-connection structure, the lower shell is provided with an avoidance hole connected to the cavity, the pre-connection structure passes through the mounting hole, the cavity and the avoidance hole in sequence and is fixedly connected to a blocking structure, the maximum diameter of the blocking structure is larger than the diameter of the mounting hole, and the pre-connection structure and the blocking structure are both made of tough material, and guard plates are fixed at both ends of the lower shell along the length direction of the avoidance hole, and the blocking structure is located between the two guard plates.

[0012] By adopting the above technical solution, the lower shell avoids the blocking structure through the avoidance hole, and protects the blocking structure through the guard plate to prevent the ceiling body from squeezing the blocking structure and deforming the blocking structure after installation. When the side air curtain explodes, if the claws detach from the card interface, the decorative cover plate is separated from the surface layer. Since the maximum diameter of the blocking structure is larger than the diameter of the installation hole, the blocking structure tightens and positions the decorative cover plate through the pre-connection structure. The detachable design of the decorative cover plate makes it easier to absorb the impact force generated during the blasting process, reducing the probability of the decorative cover plate breaking and scattering. At the same time, the decorative cover plate is connected to the ceiling body through the pre-connection structure and the blocking structure, reducing the probability of the decorative cover plate splashing and injuring people after detachment.

[0013] Optionally, an annular groove is opened in the circumferential direction at one end of the upper shell connected to the lower shell, and the annular groove is used to reduce the thickness of the upper shell, so that a weakened portion is formed at the connection between the upper shell and the lower shell.

[0014] By adopting the above technical solution, the weakened portion is formed by reducing the material of the annular groove, which facilitates integral molding during injection molding, thereby improving the manufacturing convenience of the weakened portion.

[0015] Optionally, the outer edge surface of the annular groove is perpendicular to the end surface of the upper shell close to the lower shell, and the upper shell is fixed with a plurality of abutment blocks along the circumference of the annular groove, and the side of the lower shell facing away from the substrate layer abuts against the abutment blocks.

[0016] By adopting the above technical solution, when the roof body is installed on the automobile sheet metal, the abutment block abuts against the lower shell and restricts the tendency of the lower shell to approach the upper shell, which is beneficial to reduce the probability that the lower shell will approach the upper shell due to pressure and separate along the weakened part after the driver accidentally touches the roof body.

[0017] Optionally, the annular groove is located on the end face of the upper housing close to the lower housing and communicates with the outside through the lower housing. A number of connecting rings are stacked in the annular groove. One side of the connecting ring is in contact with the upper housing, and the other side is in contact with the lower housing. Connecting grooves communicating with the annular groove are provided at one ends of the upper housing and the lower housing close to the connecting ring. A connecting member is filled in the connecting groove. The connecting ring is connected to the upper housing and the lower housing through the connecting member. The connecting ring is provided with a break opening, and a pull ring is fixedly provided at one end of the connecting ring close to the break opening.

[0018] By adopting the above technical solution, after the upper housing is installed, the operator places the connecting member into the connecting groove, so that the connecting member connects the upper housing and the lower housing through the connecting ring. The operator moves the connecting belt out of the annular groove through the pull ring, thereby facilitating the reduction of the number of connecting belts and further facilitating the adjustment of the connection strength between the upper housing and the lower housing as required.

[0019] Optionally, the buffer connecting member includes a number of flexible straps. One end of the flexible strap is fixedly connected to the upper housing, and the other end is fixedly connected to the lower housing. The flexible strap, the upper housing and the lower housing are made of the same material and are integrally formed by an injection molding process.

[0020] By adopting the above technical solution, after the upper housing and the lower housing are separated, the lower housing drives the flexible strap to deform and unfold. When the flexible strap unfolds to the maximum stretched state, the lower housing moves to the farthest distance from the upper housing, and the flexible strap buffers the lower housing, reducing the probability of the lower housing and the ceiling body flying apart.

[0021] Optionally, the buffer connecting member includes a number of adjusting straps. One end of the adjusting strap is fixedly connected to the upper housing. The lower housing is provided with a limiting hole communicating with the cavity. A number of spherical parts are fixedly provided on the adjusting strap along the length direction. The spherical parts and the adjusting strap are both injection molded from deformable materials. The maximum diameter of the spherical part is greater than the diameter of the limiting hole. A deformation groove is provided on one side of the spherical part close to the upper housing with the adjusting strap as the center. The deformation groove is used to provide space for the deformation of the spherical part. An elastic limiting ring is sleeved outside the adjusting strap, and the elastic limiting ring is located in the deformation groove and is in contact with the inner wall of the deformation groove.

[0022] By adopting the above technical solution, when the adjusting strap drives the spherical part to pass through the limiting hole, the side of the spherical part bends into the deformation groove. When the spherical part passes through the limiting hole, it restores under its own elasticity. By passing adjusting straps of different lengths through the limiting hole, it is convenient to adjust the limiting length of the adjusting strap, which is suitable for different working conditions.

[0023] Optionally, a reinforcing ring is arranged in the installation cavity. One end of the reinforcing ring away from the lower shell is fixedly provided with an abutting disc, the abutting disc is clamped with the upper shell, the fixing bolt passes through the abutting disc and is rotatably connected with the abutting disc. One end of the reinforcing ring away from the abutting disc is provided with a positioning ring, the positioning ring is located in the cavity and fits with the inner wall of the cavity. One side of the reinforcing ring close to its axis is fixedly provided with a connecting belt. The connecting belt is provided with a break along the axis direction of the reinforcing ring. The connecting belt is fixedly provided with a disassembly and assembly roller at the break. The positioning ring is sleeved outside the connecting belt and fixedly connected with the connecting belt.

[0024] By adopting the above technical solution, in the initial state, both the abutting disc and the reinforcing ring are located in the installation cavity. At this time, the reinforcing ring limits the positioning ring through the connecting belt, so that the positioning ring restricts the tendency of the lower shell to separate from the upper shell, reducing the probability that the upper shell and the lower shell are separated due to external force during storage or transportation. After assembling the upper shell to the automotive sheet metal, the connecting belt is disassembled along the break through the disassembly and assembly roller, so that the connecting belt drives the positioning ring to separate from the reinforcing ring, releasing the restriction on the lower shell and the upper shell. At this time, the abutting disc and the reinforcing ring stay in the installation cavity, which is beneficial to improving the structural strength of the upper shell and reducing the probability of the upper shell breaking during the side air curtain explosion.

[0025] In a second aspect, the present application provides a manufacturing method for a ceiling that prevents splashes during side curtain explosion, including the following steps:

[0026] Material preparation 1: Glue the decorative layer and the base material layer.

[0027] Material preparation 2: Prepare the upper shell and the lower shell by injection molding.

[0028] Press molding: Stack the base material layer and the decorative layer in sequence and press them into shape by a pressing device.

[0029] Blanking: Punch holes in the pressed ceiling raw material.

[0030] Install accessories: Install the lower shell and the upper shell onto the ceiling body.

[0031] Post-treatment: Hot stamping or laser engraving is performed on the decorative layer.

[0032] In summary, the present application includes at least one of the following beneficial technical effects:

[0033] 1. The roof body is connected to the vehicle's sheet metal via an upper shell and a lower shell. The surface finish enhances the roof body's decorative effect. The side air curtains are installed between the roof body and the vehicle's sheet metal. When the side air curtains explode, they push the roof body away from the vehicle's sheet metal, causing the roof body to exert a pulling force on the lower shell away from the upper shell. In the initial state, the upper and lower shells are connected by a weakened portion. When the side air curtains explode, the upper and lower shells separate along the weakened portion, separating the roof body from the vehicle's sheet metal and allowing the side air curtains to be released smoothly. When the upper and lower shells separate to a preset distance, the upper shell tightens the lower shell to position it, preventing the roof body from further detaching. This reduces the probability of the roof body striking and injuring the driver, improving both the stability of the roof installation and the ease of releasing the side air curtains.

[0034] 2. The lower shell avoids the blocking structure through the avoidance hole and protects the blocking structure through the guard plate to prevent the ceiling body from squeezing the blocking structure and deforming the blocking structure after installation. When the side air curtain explodes, if the claws detach from the card interface, the decorative cover plate is separated from the surface layer. Since the maximum diameter of the blocking structure is larger than the diameter of the installation hole, the blocking structure tightens and positions the decorative cover plate through the pre-connection structure. The detachable design of the decorative cover plate makes it easier to absorb the impact force generated during the blasting process and reduces the probability of the decorative cover plate breaking and scattering. At the same time, the decorative cover plate is connected to the ceiling body through the pre-connection structure and the blocking structure, reducing the probability of the decorative cover plate splashing and injuring people after detachment. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic diagram of the explosion structure of Example 1.

[0036] Figure 2 It is a schematic diagram intended to highlight the external structure of the upper shell and the lower shell.

[0037] Figure 3 This is a schematic diagram intended to highlight the connection structure of the decorative cover.

[0038] Figure 4 It is a schematic diagram intended to highlight the internal structure of the upper shell and the lower shell.

[0039] Figure 5 This is a schematic diagram of the position of the abutment block in Example 2.

[0040] Figure 6 This is a schematic diagram of the position of the connecting ring in Example 3.

[0041] Figure 7 It is a schematic diagram of the connection structure between the reinforcement ring and the positioning ring in Example 4.

[0042] Figure 8 Schematic diagram of the adjustment strap structure in Example 5.

[0043] Description of reference numerals: 1. Ceiling body; 11. Base material layer; 12. Surface decoration layer; 13. Through hole; 14. Mounting hole; 15. Bonding area; 16. Counterbore structure; 2. Lower housing; 21. Cavity; 211. Limit hole; 22. Card interface; 23. Avoidance hole; 24. Guard plate; 25. Fixed plate; 3. Upper housing; 31. Installation cavity; 32. Fixed bolt; 33. Abutting block; 4. Weakening part; 41. Connecting ring; 42. Pulling ring; 43. Connecting groove; 44. Connecting piece; 51. Flexible tie; 52. Adjusting tie; 521. Spherical part; 522. Deformation groove; 523. Elastic limit ring; 6. Decorative cover plate; 61. Claw; 62. Pre-connection structure; 621. Blocking structure; 7. Reinforcing ring; 71. Abutting disc; 72. Positioning ring; 73. Connecting band; 74. Disassembly and assembly roller. Detailed implementation manners

[0044] The following further describes the present application in detail with reference to all the attached drawings.

[0045] An embodiment of the present application discloses a ceiling for preventing flying objects during side curtain blasting.

[0046] Embodiment 1:

[0047] Referring to Figure 1 and Figure 2 , a ceiling for preventing flying objects during side curtain blasting includes a ceiling body 1. The ceiling body 1 includes a base material layer 11 and a surface decoration layer 12. The base material layer 11 and the surface decoration layer 12 are overlapped and fixed by pressing. The material of the base material layer 11 is one or more of PU foam, PP, and PET foam materials. The surface decoration layer 12 is provided with a sound absorption structure, which is beneficial to improving the sound insulation effect of the ceiling body 1.

[0048] Referring to Figure 1 and Figure 2 , a lower housing 2 is provided on one side of the base material layer 11, and an upper housing 3 is provided on the side of the lower housing 2 away from the base material layer 11. The lower housing 2 and the upper housing 3 are made of the same material, both of which are plastic materials, and are sequentially formed by injection molding. A fixed plate 25 is fixedly provided on the side of the lower housing 2 close to the base material layer 11. The ceiling body 1 is provided with a bonding area 15 corresponding to the fixed plate 25. The fixed plate 25 is located in the bonding area 15 and is attached to the base material layer 11. The fixed plate 25 is fixedly connected to the base material layer 11 by bonding or welding, so that the lower housing 2 is connected to the ceiling body 1.

[0049] Referring to Figure 2 and Figure 3, a weakening portion 4 is provided between the upper housing 3 and the lower housing 2. The weakening portion 4 is located at the end face of the lower housing 2 close to the upper housing 3 and is formed by an annular groove surrounding the upper housing 3. The weakening portion 4 is used to reduce the thickness of the connection between the upper housing 3 and the lower housing 2, thereby reducing the connection strength between the upper housing 3 and the lower housing 2. When both the upper housing 3 and the lower housing 2 are subjected to external forces away from each other and the magnitude of the external force is greater than the connection strength of the weakening portion 4, the upper housing 3 and the lower housing 2 are separated along the annular groove. It should be noted that the bearing capacity of the weakening portion 4 for external forces is less than the impact force generated during the side air curtain blasting process.

[0050] Referring to Figure 2 and Figure 4 , a buffer connecting member is provided between the upper housing 3 and the lower housing 2. The buffer connecting member includes a plurality of flexible straps 51. The number of flexible straps 51 is at least one. In this embodiment, two flexible straps 51 are taken as an example for illustration. One end of the flexible strap 51 is fixedly connected to the upper housing 3, and the other end is fixedly connected to the lower housing 2. The connection method can be welding, gluing, bolt connection or others. In this embodiment, the flexible strap 51 and the upper housing 3 and the lower housing 2 are integrally formed by injection molding.

[0051] Referring to Figure 2 and Figure 4 , an installation cavity 31 is formed on the side of the upper housing 3 close to the lower housing 2. A cavity 21 communicating with the installation cavity 31 is opened in the lower housing 2. A through hole 13 communicating with the cavity 21 is opened in the ceiling body 1. A fixing bolt 32 is provided in the installation cavity 31. The upper housing 3 is provided with a connection port adapted to the fixing bolt 32. When installing the ceiling body 1, the operator passes the fixing bolt 32 through the through hole 13 and the cavity 21 and threadedly connects it to the vehicle body sheet metal, thereby connecting the upper housing 3 to the vehicle body sheet metal.

[0052] Referring to Figure 3 and Figure 4 , a decorative cover plate 6 is provided on the side of the decorative layer 12 facing away from the base layer 11. A pre-connection structure 62 is fixedly provided on the side of the decorative cover plate 6 close to the decorative layer 12. The pre-connection structure 62 and the decorative cover plate 6 are integrally formed by injection molding and are both made of PP-TD20 material, having good toughness and deformability. The ceiling body 1 is provided with an installation hole 14 communicating with the cavity 21. In the initial state, the pre-connection structure 62 passes through the installation hole 14 and extends to the inner side of the cavity 21. A blocking structure 621 is fixedly provided on the side of the pre-connection structure 62 away from the decorative cover plate 6. The blocking structure 621 is made of deformable material, and the maximum diameter of the blocking structure 621 is greater than the diameter of the installation hole 14, thereby preventing the pre-connection structure 62 from detaching from the installation hole 14.

[0053] Referring to Figure 3 and Figure 4, on the side of the decorative cover plate 6 close to the ceiling body 1, a plurality of clamping claws 61 are also fixedly connected. The lower shell 2 is provided with clamping interfaces 22 communicating with the cavity 21, and the clamping interfaces 22 correspond to the clamping claws 61 one by one. After the upper shell 3 is installed on the vehicle sheet metal through the fixing bolts 32, the operator moves the decorative cover plate 6 to the through hole 13, so that the clamping claws 61 pass through the through hole 13 and the cavity 21 and are clamped into the clamping interfaces 22. At this time, the clamping claws 61 are clamped with the lower shell 2, and then the lower shell 2 positions the decorative cover plate 6. At this time, the decorative cover plate 6 blocks the through hole 13 and the mounting hole 14, which is beneficial to reducing the probability of foreign objects entering between the base material layer 11 and the vehicle sheet metal.

[0054] Referring to Figure 3 and Figure 4 , the lower shell 2 is provided with an avoidance hole 23 communicating with the cavity 21. After the clamping claws 61 are clamped with the lower shell 2, the blocking structure 621 is located in the avoidance hole 23. On both sides of the lower shell 2 along the length direction of the avoidance hole 23, guard plates 24 are fixedly connected. The blocking structure 621 is located between the two guard plates 24, and the guard plates 24 are beneficial to reducing the probability of the blocking structure 621 being deformed due to extrusion. On the side of the fixing plate 25 close to the base material layer 11, a placement groove adapted to the decorative cover plate 6 is provided. The ceiling body 1 is recessed into the placement groove to form a sunk structure 16 adapted to the decorative cover plate 6. The decorative cover plate 6 is located in the sunk structure 16 and is attached to the surface decoration layer 12. Thereby, while improving the aesthetics of the decorative cover plate 6, the probability of the decorative cover plate 6 being laterally impacted is reduced, and the installation stability of the decorative cover plate 6 is improved.

[0055] The implementation principle of Embodiment 1 is as follows: The side airbag is installed between the base material layer 11 and the vehicle sheet metal. When the vehicle is impacted and the side airbag explodes, the deployed side airbag pushes the ceiling body 1 in a direction away from the vehicle sheet metal. Under the connection action between the base material layer 11 and the fixing plate 25, when the ceiling body 1 moves, it applies a pulling force away from the upper shell 3 to the lower shell 2. The structural strength of the weakening part 4 is lower than the pulling force received by the lower shell 2 after the side airbag explodes. Therefore, after the side airbag explodes, the upper shell 3 and the lower shell 2 are separated along the weakening part 4, so that the ceiling body 1 is separated from the vehicle sheet metal, facilitating the smooth escape of the side airbag. After the upper shell 3 and the lower shell 2 are separated, the flexible tie belt 51 gradually unfolds and deforms, and stops after unfolding to the maximum length. At this time, the upper shell 3 tightens and positions the lower shell 2 and the ceiling body 1 through the flexible tie belt 51, which is beneficial to preventing the ceiling body 1 from flying away excessively. At the same time, during the side airbag blasting process, if the clamping claws 61 of the decorative cover plate 6 are detached from the clamping interfaces 22, then at this time, the blocking structure 621 cooperates with the pre-connection structure 62 to buffer and limit the decorative cover plate 6, reducing the probability of the decorative cover plate 6 flying away. While improving the installation stability of the ceiling, the convenience of the side airbag escape is improved.

[0056] Embodiment 2:

[0057] Referring to Figure 5 , the difference between this embodiment and Embodiment 1 lies in that the position of the weakening portion 4 is different. In this embodiment, the end face surrounded by the annular groove is perpendicular to the fixing bolt 32. And a plurality of abutting blocks 33 are fixedly connected to the upper housing 3 along the circumferential direction of the annular groove. The abutting blocks 33 are located in the annular groove and abut against the lower housing 2. The abutting blocks 33 are connected to the upper housing 3 by bonding or welding after the upper housing 3 is injection-molded. During the normal use of the ceiling body 1, if the driver or passenger accidentally touches or presses the ceiling body 1, causing the ceiling body 1 to drive the lower housing 2 to approach the upper housing 3, the abutting blocks 33 will block the lower housing 2, thereby reducing the probability that the lower housing 2 approaches the upper housing 3 due to pressure and separates along the weakening portion 4 while keeping the weakening portion 4 working properly, and improving the working stability of the upper housing 3 and the lower housing 2.

[0058] Embodiment 3:

[0059] Referring to Figure 6 , the difference between this embodiment and Embodiment 1 lies in that the position of the weakening portion 4 is different. In this embodiment, the end face where the annular groove is located is inside the cavity 21 and is at one end of the upper housing 3 close to the lower housing 2. A plurality of connecting rings 41 are stacked in the annular groove. One side of the connecting ring 41 abuts against the upper housing 3, and the other side abuts against the lower housing 2. Connecting grooves 43 are provided on one side of the upper housing 3 and the lower housing 2 close to the connecting ring 41. A connecting member 44 is provided in the connecting groove 43. The connecting member 44 can be an adhesive or a welding material for fixedly connecting the connecting ring 41 with the upper housing 3 and the lower housing 2.

[0060] In the initial state, the connecting ring 41 is separated from both the upper housing 3 and the lower housing 2, which is convenient for the operator to remove the connecting ring 41 from the annular groove. The connecting ring 41 is provided with a break opening, and a pull ring 42 is fixedly provided at the break opening. Both the break opening and the pull ring 42 are used to improve the convenience of the operator when removing the connecting ring 41. Under the action of the connecting member 44, the connection strength between the upper housing 3 and the lower housing 2 increases with the increase in the number of connecting rings 41. The number of connecting rings 41 is set according to actual needs, so as to be applicable to different working environments and is beneficial to improving the use convenience of the upper housing 3 and the lower housing 2.

[0061] Embodiment 4:

[0062] Referring to Figure 7, the difference between this embodiment and Embodiment 1 is that: a reinforcing ring 7 is arranged in the installation cavity 31. The reinforcing ring 7 is made of metal and fits against the inner wall of the installation cavity 31. A contact disk 71 is fixedly arranged on the side of the reinforcing ring 7 away from the lower housing 2. The contact disk 71 is clamped or bonded to the upper housing 3, so that the contact disk 71 fits against the upper housing 3. The contact disk 71 is provided with a round hole adapted to the fixing bolt 32. The fixing bolt 32 passes through the round hole and the upper housing 3 and is threadedly connected to the automotive sheet metal.

[0063] On the side of the reinforcing ring 7 away from the contact disk 71, a positioning ring 72 is provided. The positioning ring 72 is located in the cavity 21 and abuts against the side wall of the cavity 21 close to the upper housing 3. The positioning ring 72 is separately arranged from the reinforcing ring 7, and a connecting band 73 is arranged between the positioning ring 72 and the reinforcing ring 7. The connecting band 73 is located inside the positioning ring 72 and is fixedly connected to both the positioning ring 72 and the reinforcing ring 7 by bonding. The connecting band 73 is provided with a break. One end of the connecting band 73 close to the break is fixedly provided with a disassembly and assembly roller 74, and the disassembly and assembly roller 74 is parallel to the fixing bolt 32.

[0064] In the initial state, the positioning ring 72 is connected to the reinforcing ring 7 through the connecting band 73. At this time, the positioning ring 72 restricts the tendency of the lower housing 2 to separate from the upper housing 3. Thus, during transportation and storage, the structural strength of the upper housing 3 and the lower housing 2 is improved. After the upper housing 3 is installed on the automotive sheet metal, the operator can rotate the disassembly and assembly roller 74 to remove the connecting band 73 through the disassembly and assembly roller 74, so that the positioning ring 72 is separated from the reinforcing ring 7, and thus the restriction on the lower housing 2 is released. After the connecting band 73 is removed, both the reinforcing ring 7 and the contact disk 71 stay in the installation cavity 31. Thus, it is beneficial to improve the structural strength of the upper housing 3, reduce the probability of the upper housing 3 being broken due to external force after the side air curtain explodes, and further improve the use safety of the ceiling body 1.

[0065] Embodiment 5:

[0066] Refer to Figure 8 , the difference between this embodiment and Embodiment 1 is that: the structure of the buffer connecting piece is different. In this embodiment, the buffer connecting piece includes a plurality of adjusting laces 52. One end of the adjusting lace 52 is fixedly connected to the upper housing 3, and the other end is freely movable. The lower housing 2 is provided with a limiting hole 211 corresponding to the adjusting lace 52. The diameter of the limiting hole 211 is larger than the diameter of the adjusting lace 52. A plurality of spherical parts 521 are uniformly fixed along the length direction of the adjusting lace 52, and the maximum diameter of the spherical parts 521 is larger than the diameter of the limiting hole 211.

[0067] The spherical portion 521 and the adjustment strap 52 are both made of a deformable material, such as plastic. A deformation groove 522 is defined on the side of the spherical portion 521 closest to the upper housing 3. When the spherical portion 521 passes through the retaining hole 211 and moves into the cavity 21, it deforms and contracts within the deformation groove 522. After passing through the retaining hole 211, the spherical portion 521 returns to its original shape through its own elasticity. An elastic retaining ring 523 is positioned within the cavity 21. This elastic retaining ring 523 is positioned around the outside of the adjustment strap 52 and is located on the side of the spherical portion 521 closest to the retaining hole 211, facing the upper housing 3.

[0068] After the lower shell 2 is separated from the upper shell 3, the upper shell 3 drives the spherical portion 521 out of the cavity 21 through the adjustment strap 52. When the spherical portion 521 moves, it drives the elastic limiting ring 523 to contact the inner wall of the cavity 21. At this time, the elastic limiting ring 523 prevents the spherical portion 521 from moving further, thereby limiting the separation trend of the upper shell 3 and the lower shell 2, reducing the probability of the lower shell 2 and the ceiling body 1 flying apart. When installing the ceiling body 1, the operator moves the adjustment strap 52, and then adjusts the length of the adjustment strap 52 between the upper shell 3 and the lower shell 2, so that the upper shell 3 and the lower shell 2 have different maximum separation distances, which is suitable for different working conditions and helps to improve the convenience of using the ceiling body 1.

[0069] The present application also discloses a method for manufacturing a roof that prevents splashing objects when a side curtain is exploded, comprising the following steps:

[0070] Material preparation 1: Glue the finishing layer 12 and the base material layer 11;

[0071] Material preparation 2: prepare the upper shell 3 and the lower shell 2 by injection molding;

[0072] Pressing and forming: stacking the base material layer 11 and the surface finishing layer 12 in sequence and pressing and forming them by a pressing device;

[0073] Punching: Punching is performed on the pressed ceiling material to form a through opening 13 and a mounting hole 14 on the ceiling body 1;

[0074] Install accessory 1: First, place the decorative cover plate 6 on the side of the decorative layer facing away from the base material layer 11, pass the blocking structure 621 through the installation hole 14, and connect the decorative cover plate 6 to the ceiling body 1;

[0075] Install accessory 2: Apply adhesive to the surface of the bonding area 15, place the fixing plate 25 into the bonding area 15, and fix the fixing plate 25 to the substrate layer 11 through the adhesive;

[0076] Post-processing: hot stamping or laser engraving is performed on the finishing layer 12 .

[0077] The above are all preferred embodiments of the present application, and do not limit the protection scope of the present application. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application shall be covered within the protection scope of the present application.

Claims

1. A roof for preventing splashes during side curtain blasting, comprising a roof body (1), the roof body (1) including a surface decoration layer (12) and a base material layer (11), the base material layer (11) being fixedly connected to the surface decoration layer (12) and being used for connecting to an automotive sheet metal, characterized in that: A lower shell (2) is fixedly provided on the side of the base material layer (11) facing away from the surface finishing layer (12); an upper shell (3) for connecting to the automobile sheet metal is provided on the side of the lower shell (2) facing away from the base material layer (11); the upper shell (3) is fixedly connected to the lower shell (2); and a weakening portion (4) is provided between the upper shell (3) and the lower shell (2); the weakening portion (4) is used to reduce the connection strength between the upper shell (3) and the lower shell (2); when a force is generated between the upper shell (3) and the lower shell (2), the upper shell (3) and the lower shell (2) are pushed. When an external force is applied to separate the housing (3) from the lower housing (2), and the magnitude of the external force exceeds the bearing range of the weakened portion (4), the upper housing (3) and the lower housing (2) are separated with the weakened portion (4) as the center. A buffer connection is provided between the lower housing (2) and the upper housing (3). When the upper housing (3) and the lower housing (2) are separated from each other, the buffer connection is used to buffer the force between the upper housing (3) and the lower housing (2), and to limit the upper housing (3) and the lower housing (2) after separation. The upper shell (3) is provided with an installation cavity (31) on one side close to the lower shell (2), a fixing bolt (32) is provided in the installation cavity (31), a cavity (21) communicating with the installation cavity (31) is provided inside the lower shell (2), the roof body (1) is provided with a through-port (13) communicating with the cavity (21), the fixing bolt (32) passes through the through-port (13) of the roof body (1) and the lower shell (2) in sequence, and is connected to the automobile sheet metal thread through the upper shell (3). A decorative cover plate (6) is abutted against the side of the surface finishing layer (12) facing away from the base material layer (11); a plurality of clamping claws (61) are provided on the side of the decorative cover plate (6) close to the surface finishing layer (12); a plurality of clamping interfaces (22) communicating with the cavity (21) are opened in the circumferential direction of the lower shell (2); the clamping claws (61) correspond to the clamping interfaces (22) one by one; the clamping claws (61) pass through the through opening (13) and extend into the cavity (21), and are clamped with the lower shell (2) through the corresponding clamping interfaces (22).

2. The ceiling for preventing splashes during side curtain blasting according to claim 1, wherein: The decorative cover plate (6) is further provided with a pre-connection structure (62) on a side close to the surface finishing layer (12); the ceiling body (1) is provided with a mounting hole (14) corresponding to the pre-connection structure (62); the lower shell (2) is provided with a avoidance hole (23) communicating with the cavity (21); the pre-connection structure (62) passes through the mounting hole (14), the cavity (21) and the avoidance hole (23) in sequence and is fixedly connected with a blocking structure (621); the maximum diameter of the blocking structure (621) is greater than the diameter of the mounting hole (14); the pre-connection structure (62) and the blocking structure (621) are both made of a tough material; guard plates (24) are fixedly provided at both ends of the lower shell (2) along the length direction of the avoidance hole (23); and the blocking structure (621) is located between the two guard plates (24).

3. A ceiling for preventing splashes during side curtain blasting according to claim 1, characterized in that: An annular groove is formed in the circumferential direction at one end of the upper shell (3) connected to the lower shell (2); the annular groove is used to reduce the thickness of the upper shell (3), thereby forming a weakened portion (4) at the connection between the upper shell (3) and the lower shell (2).

4. A ceiling for preventing splashes during side curtain blasting according to claim 3, characterized in that: The outer edge surface where the annular groove is located is perpendicular to the end surface of the upper housing (3) close to the lower housing (2). A plurality of abutting blocks (33) are fixedly arranged along the circumferential direction of the annular groove on the upper housing (3), and the side of the lower housing (2) facing away from the base material layer (11) abuts against the abutting blocks (33).

5. The ceiling for preventing splashes during side curtain blasting according to claim 3, characterized in that: The annular groove is located on the end surface of the upper housing (3) close to the lower housing (2) and communicates with the outside through the lower housing (2). A plurality of connecting rings (41) are stacked in the annular groove. One side of the connecting ring (41) is attached to the upper housing (3), and the other side is attached to the lower housing (2). Connecting grooves (43) communicating with the annular groove are opened at one ends of the upper housing (3) and the lower housing (2) close to the connecting ring (41). Connecting members (44) are filled in the connecting grooves (43). The connecting ring (41) is connected to the upper housing (3) and the lower housing (2) through the connecting members (44). The connecting ring (41) is provided with a break opening, and a pull ring (42) is fixedly arranged at one end of the connecting ring (41) close to the break opening.

6. The ceiling for preventing splashes during side curtain blasting according to claim 1, characterized in that: The buffer connecting member includes a plurality of flexible laces (51). One end of the flexible lace (51) is fixedly connected to the upper housing (3), and the other end is fixedly connected to the lower housing (2). The flexible laces (51), the upper housing (3) and the lower housing (2) are made of the same material and are integrally formed by an injection molding process.

7. A roof for preventing flying objects during side curtain blasting according to claim 1, characterized in that: The buffer connecting member includes a plurality of adjusting laces (52). One end of the adjusting lace (52) is fixedly connected to the upper housing (3). The lower housing (2) is provided with a limiting hole (211) communicating with the cavity (21). A plurality of spherical parts (521) are fixedly arranged along the length direction of the adjusting lace (52). The spherical parts (521) and the adjusting lace (52) are both injection molded from deformable materials. The maximum diameter of the spherical parts (521) is larger than the diameter of the limiting hole (211). A deformation groove (522) is opened on one side of the spherical part (521) close to the upper housing (3) with the adjusting lace (52) as the center. The deformation groove (522) is used to provide space for the deformation of the spherical part (521). An elastic limiting ring (523) is sleeved outside the adjusting lace (52). The elastic limiting ring (523) is located in the deformation groove (522) and fits with the inner wall of the deformation groove (522).

8. A ceiling for preventing splashes during side curtain blasting according to claim 1, characterized in that: A reinforcing ring (7) is arranged in the installation cavity (31). An abutting disc (71) is fixedly arranged at one end of the reinforcing ring (7) away from the lower housing (2). The abutting disc (71) is clamped with the upper housing (3). A fixing bolt (32) passes through the abutting disc (71) and is rotatably connected to the abutting disc (71). A positioning ring (72) is arranged at one end of the reinforcing ring (7) away from the abutting disc (71). The positioning ring (72) is located in the cavity (21) and fits with the inner wall of the cavity (21). A connecting belt (73) is fixedly arranged on one side of the reinforcing ring (7) close to its axis. The connecting belt (73) is provided with a break opening along the axial direction of the reinforcing ring (7). A disassembly and assembly roller (74) is fixedly arranged at the break opening of the connecting belt (73). The positioning ring (72) is sleeved outside the connecting belt (73) and is fixedly connected to the connecting belt (73).

9. A manufacturing method of a ceiling, applied to the ceiling for preventing splashes during side curtain blasting as described in any one of claims 1-8, characterized in that, Including the following steps: Material preparation one: Glue the surface decoration layer (12) and the base material layer (11). Material Preparation 2: Prepare the upper housing (3) and the lower housing (2) by injection molding; Press Forming: Stack the base material layer (11) and the surface decoration layer (12) in sequence and press and form them through a pressing device; Blanking: Punch holes in the pressed ceiling raw material; Install Accessories: Install the lower housing (2) and the upper housing (3) onto the ceiling body (1); Post-treatment: Perform hot stamping or laser engraving on the surface decoration layer (12).

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