Ceiling capable of preventing splash during side curtain blasting and manufacturing method of ceiling

Abstract

The invention discloses a ceiling capable of preventing splash during side curtain blasting and a manufacturing method thereof, and relates to the field of vehicle ceiling structures, the ceiling comprises a ceiling body, the ceiling body comprises a facing layer and a base material layer, a lower shell is arranged on the side, away from the facing layer, of the base material layer, and an upper shell used for being connected with an automobile metal plate is fixedly arranged on the lower shell; a weakening part is arranged between the upper shell and the lower shell and used for reducing the connecting strength between the upper shell and the lower shell, and when external force pushing the upper shell and the lower shell to be separated is generated between the upper shell and the lower shell and exceeds the bearing range of the weakening part, the upper shell and the lower shell are separated with the weakening part as the center. A buffering connecting piece is arranged between the lower shell and the upper shell, and when the upper shell and the lower shell are separated from each other, the buffering connecting piece is used for buffering the upper shell and the lower shell and limiting the distance between the upper shell and the lower shell after separation. The ceiling mounting structure has the advantages that the ceiling mounting stability is improved, and meanwhile the side air curtain can be conveniently disengaged.

Description

Technical Field

[0001] The invention relates to the field of automobile roof structures, in particular to a roof that prevents splashing objects when side curtains explode and a manufacturing method thereof. Background Art

[0002] The car roof 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. For related technologies, please refer to the Chinese patent with announcement number CN215322878U, which discloses a new energy vehicle roof reinforcement structure, including a roof body, the inner surface of the roof body is provided with a front reading light hole, the inner surface of the roof body is provided with four sun visor holes, the inner surface of the roof body is provided with four handle holes, the inner surface of the roof body is provided with a rear reading light hole, the outer surface of the roof body is provided with two B-pillar notches, the outer surface of the sound insulation layer is fixedly installed with a foam layer, and the inner surface of the roof body is provided with a skylight hole.

[0003] Side curtains, also known as side air curtains, are a safety device installed between the roof and the frame. When the car encounters a collision or other situations during driving, the side air curtains need to be released from the roof to protect the safety of the driver and passengers. With the development of the economy, people's requirements for cars are not just as simple as a means of transportation, and the requirements for the aesthetics of the interior are getting higher and higher; the simple interior layout is an aesthetic that people pursue. In order to cater to this aesthetic trend, more and more safety handles on the roof are cancelled; this results in the lack of a rigid fixing point for the handle position on the roof, which causes the roof to fall off and splash when it explodes.

[0004] In view of the above-mentioned related technologies, in order to solve the problem that the roof is easy to fall off when the side air curtain explodes, the conventional method is to add a bracket for screw fixation or buckle fixation. However, if screw fixation is adopted, then since the bracket is rigidly fixed, it will limit the separation of the roof from the vehicle sheet metal during the side air curtain explosion process, which may easily lead to the side air curtain not being able to be smoothly disengaged or unable to be fully opened within the specified time, so that when the vehicle has an accident, the side air curtain cannot well protect the safety of the driver and passengers; if buckle fixation is adopted, due to the great impact force generated when the side air curtain explodes, it is very easy to cause the buckle fixation to fail, the buckle will fall out and splash, causing harm to passengers and drivers, so there is an urgent need for a roof structure that improves the stability of the roof installation and facilitates the side air curtain to fall out. Summary of the invention

[0005] In order to improve the installation stability of the ceiling and facilitate the removal of the side air curtains, the present application provides a ceiling that can prevent splashing when the side curtains explode and a method for manufacturing the same.

[0006] In a first aspect, the present application provides a ceiling for preventing splashing objects when a side curtain is blasted, adopting the following technical solution: A ceiling for preventing splashes during side curtain explosion comprises a ceiling body, wherein the ceiling body comprises a surface finishing layer and a base material layer, wherein the base material layer is fixedly connected to the surface finishing layer and is used to be connected to automobile sheet metal, a lower shell is fixedly provided on the side of the base material layer facing away from the surface finishing layer, and an upper shell for connecting to the automobile sheet metal is provided on the side of the lower shell facing away from the base material layer, the upper shell is fixedly connected to the lower shell, and 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 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 connector 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 connector is used to buffer the force between the upper shell and the lower shell, and limit the distance between the upper shell and the lower shell after separation.

[0007] By adopting the above technical solution, the ceiling body is connected to the automobile sheet metal through the upper shell and the lower shell, the surface finishing layer is used to improve the decorative effect of the ceiling body, and the side air curtain is installed between the ceiling body and the automobile sheet metal. When the side air curtain explodes, the ceiling body is pushed away from the automobile sheet metal, so that the ceiling body applies a pulling force to the lower shell in the direction away from the upper shell. In the initial state, the upper shell and the lower shell are connected through the weakened part. When the side air curtain explodes, the upper shell and the lower shell are separated along the weakened part, so that the ceiling body is separated from the automobile sheet metal and the side air curtain is smoothly removed. When the upper shell and the lower shell are separated to a preset distance, the upper shell tightens and positions the lower shell through the buffer connector, thereby preventing the ceiling body from further detaching, reducing the probability of the ceiling body hitting and injuring the driver, and improving the installation stability of the ceiling while improving the convenience of removing the side air curtain.

[0008] Optionally, an installation cavity is opened on one side of the upper shell body close to the lower shell body, a fixing bolt is provided in the installation cavity, a cavity connected to the installation cavity is provided inside the lower shell body, a through opening connected to the cavity is opened on the ceiling body, the fixing bolt passes through the through opening of the ceiling body and the lower shell body in sequence, and is threadedly connected to the automobile sheet metal through the upper shell body, a decorative cover plate is abutted on the side of the surface finishing layer facing away from the substrate layer, 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 body, the claws correspond to the card interfaces one by one, the claws pass through the through opening and extend into the cavity, and are clamped with the lower shell body through the corresponding card interfaces.

[0009] By adopting the above technical solution, the fixing bolts push the upper shell to abut against the automobile sheet metal, thereby connecting the upper shell to the automobile sheet metal. The through-hole, cavity and installation cavity provide space for operators to install and remove the fixing bolts. In the initial state, when the claw is located in the card interface, the decorative cover plate fits with the surface finishing layer, thereby shielding and modifying the through-hole of the ceiling body. While improving the connection strength between the lower shell and the ceiling body, the probability of external debris entering between the ceiling and the automobile sheet metal is reduced.

[0010] Optionally, a pre-connection structure is further provided on one 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 fixedly provided 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.

[0011] By adopting the above technical scheme, 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 finishing 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 to reduce the probability of splashing and injuring people after the decorative cover plate is detached.

[0012] 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 to form a weakened portion at the connection between the upper shell and the lower shell.

[0013] By adopting the above technical solution, the weakened portion is formed by reducing the material of the annular groove, which is convenient for integral molding during injection molding, thereby improving the manufacturing convenience of the weakened portion.

[0014] 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.

[0015] By adopting the above technical solution, when the ceiling body is installed on the automobile sheet metal, the abutment block abuts against the lower shell and limits the tendency of the lower shell to approach the upper shell, which helps to reduce the probability that the lower shell approaches the upper shell due to pressure and separates along the weakened part after the driver accidentally touches the ceiling body.

[0016] Optionally, the annular groove is located on the end face of the upper shell body close to the lower shell body, and is connected to the outside through the lower shell body, and a number of connecting rings are stacked in the annular groove, one side of the connecting ring is fitted with the upper shell body, and the other side is fitted with the lower shell body, and the upper shell body and the lower shell body are provided with connecting grooves connected to the annular groove at one end close to the connecting ring, and the connecting grooves are filled with connecting parts, and the connecting rings are connected to the upper shell body and the lower shell body through the connecting parts, and a disconnection port is opened in the connecting ring, and a pull ring is fixed at one end of the connecting ring close to the disconnection port.

[0017] By adopting the above technical solution, after installing the upper shell, the operator puts the connecting piece into the connecting groove, so that the connecting piece connects the upper shell and the lower shell through the connecting ring. The operator moves the connecting belt out of the annular groove through the pull ring, thereby reducing the number of connecting belts and adjusting the connection strength between the upper shell and the lower shell as needed.

[0018] Optionally, the buffer connector includes a plurality of flexible ties, one end of the flexible ties is fixedly connected to the upper shell, and the other end is fixedly connected to the lower shell. The flexible ties, the upper shell and the lower shell are made of the same material and are integrally formed by injection molding.

[0019] By adopting the above technical solution, when the upper shell is separated from the lower shell, the lower shell drives the flexible tether to deform and unfold. When the flexible tether is unfolded to the maximum extension state, the lower shell moves to the farthest distance from the upper shell, and the flexible tether cushions the lower shell, reducing the probability of the lower shell and the ceiling body flying apart.

[0020] Optionally, the buffer connection component includes a plurality of adjustment straps, one end of the adjustment straps is fixedly connected to the upper shell body, the lower shell body is provided with a limiting hole connected to the cavity, the adjustment straps are fixed with a plurality of spherical parts along the length direction, the spherical parts and the adjustment straps are both made of deformable material by injection molding, the maximum diameter of the spherical part is larger than the diameter of the limiting hole, a deformation groove is provided on the side of the spherical part close to the upper shell body with the adjustment strap as the center, the deformation groove is used to provide space for the deformation of the spherical part, and an elastic limiting ring is provided on the outer side of the adjustment strap, the elastic limiting ring is located in the deformation groove and fits with the inner wall of the deformation groove.

[0021] By adopting the above technical solution, when the adjustment strap drives the spherical part to pass through the limiting hole, the side edge of the spherical part bends into the deformation groove. After passing through the limiting hole, the spherical part recovers under the action of its own elasticity. By passing adjustment straps of different lengths through the limiting hole, it is convenient to adjust the limiting length of the adjustment strap, which is suitable for different working conditions.

[0022] Optionally, a reinforcement ring is provided in the installation cavity, and an abutment plate is fixedly provided at the end of the reinforcement ring away from the lower shell body, the abutment plate is clamped with the upper shell body, the fixing bolt passes through the abutment plate and is rotatably connected with the abutment plate, and a positioning ring is provided at the end of the reinforcement ring away from the abutment plate, the positioning ring is located in the cavity and fits with the inner wall of the cavity, a connecting belt is fixedly provided on the side of the reinforcement ring close to its own axis, the connecting belt has a fracture along the axial direction of the reinforcement ring, a disassembly roller is fixedly provided at the fracture of the connecting belt, and the positioning ring is sleeved on the outside of the connecting belt and fixedly connected to the connecting belt.

[0023] By adopting the above technical solution, in the initial state, the abutment plate and the reinforcement ring are both located in the installation cavity. At this time, the reinforcement ring limits the positioning ring through the connecting belt, so that the positioning ring limits the tendency of the lower shell to separate from the upper shell, reducing the probability of the upper shell and the lower shell being separated due to external force during storage or transportation. After the upper shell is assembled on the automobile sheet metal, the connecting belt is disassembled along the fracture by the disassembly roller, so that the connecting belt drives the positioning ring and the reinforcement ring to separate, and the restriction on the lower shell and the upper shell is released. At this time, the abutment plate and the reinforcement ring stay in the installation cavity, which is conducive to improving the structural strength of the upper shell and reducing the probability of the upper shell collapsing when the side air curtain explodes.

[0024] In a second aspect, the present application provides a method for manufacturing a ceiling that prevents splashing objects when a side curtain is exploded, comprising the following steps: Material preparation 1: Glue the finishing layer and base material layer; Material preparation 2: prepare the upper shell and the lower shell by injection molding; Pressing and forming: The base material layer and the surface finishing layer are stacked in sequence and pressed and formed by a pressing device; Punching: Punching and punching on the pressed ceiling material; Install accessories: Install the lower shell and upper shell onto the ceiling body; Post-processing: hot stamping or laser engraving of the finishing layer.

[0025] In summary, the present application includes at least one of the following beneficial technical effects: 1. The ceiling body is connected to the car sheet metal through the upper shell and the lower shell. The surface finishing layer is used to improve the decorative effect of the ceiling body. The side air curtain is installed between the ceiling body and the car sheet metal. When the side air curtain explodes, it pushes the ceiling body away from the car sheet metal, so that the ceiling body applies a pulling force to the lower shell away from the upper shell. In the initial state, the upper shell and the lower shell are connected through a weakened part. When the side air curtain explodes, the upper shell and the lower shell are separated along the weakened part, so that the ceiling body is separated from the car sheet metal and the side air curtain is smoothly removed. When the upper shell and the lower shell are separated to a preset distance, the upper shell tightens and positions the lower shell through a buffer connector, thereby preventing the ceiling body from further detaching, reducing the probability of the ceiling body hitting and injuring the driver, and improving the installation stability of the ceiling while improving the convenience of removing the side air curtain; 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 finishing 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 to reduce the probability of splashing and injuring people after the decorative cover plate is detached. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the explosion structure of Example 1.

[0027] Figure 2 It is a schematic diagram intended to highlight the external structure of the upper shell and the lower shell.

[0028] Figure 3 It is a schematic diagram intended to highlight the connection structure of the decorative cover.

[0029] Figure 4 It is a schematic diagram intended to highlight the internal structure of the upper shell and the lower shell.

[0030] Figure 5 It is a schematic diagram of the position of the abutment block in Example 2.

[0031] Figure 6 This is a schematic diagram of the position of the connecting ring in Example 3.

[0032] Figure 7 It is a schematic diagram of the connection structure between the reinforcement ring and the positioning ring in Example 4.

[0033] Figure 8 It is a schematic diagram of adjusting the lacing structure in Example 5.

[0034] Explanation of the reference numerals in the accompanying drawings: 1. Ceiling body; 11. Base material layer; 12. Finishing layer; 13. Through opening; 14. Mounting hole; 15. Bonding area; 16. Sinking platform structure; 2. Lower shell; 21. Cavity; 211. Limiting hole; 22. Card interface; 23. Avoidance hole; 24. Guard plate; 25. Fixing plate; 3. Upper shell; 31. Mounting cavity; 32. Fixing bolt; 33. Abutment block; 4. Weakened portion; 41. Connecting ring; 42. Pull ring; 43. Connecting groove; 44. Connecting piece; 51. Flexible lace; 52. Adjusting lace; 521. Spherical portion; 522. Deformation groove; 523. Elastic limiting ring; 6. Decorative cover plate; 61. Claw; 62. Pre-connection structure; 621. Blocking structure; 7. Reinforcement ring; 71. Abutment disk; 72. Positioning ring; 73. Connecting belt; 74. Disassembly and assembly roller. DETAILED DESCRIPTION

[0035] The present application is further described in detail below in conjunction with all the accompanying drawings.

[0036] The embodiment of the present application discloses a ceiling that prevents splashing objects when a side curtain explodes.

[0037] Embodiment 1: Reference Figure 1 and Figure 2 A ceiling for preventing splashes when a side curtain explodes comprises a ceiling body 1, wherein the ceiling body 1 comprises a base material layer 11 and a surface finishing layer 12, wherein the base material layer 11 and the surface finishing layer 12 are overlapped and fixed by pressing, and the material of the base material layer 11 is one or more of PU foam, PP and PET foam materials. The surface finishing layer 12 is provided with a sound absorbing structure, which is beneficial to improving the sound insulation effect of the ceiling body 1.

[0038] Reference Figure 1 and Figure 2 A lower shell 2 is provided on one side of the substrate layer 11, and an upper shell 3 is provided on the side of the lower shell 2 away from the substrate layer 11. The lower shell 2 and the upper shell 3 are made of the same material, both of which are plastic materials, and are formed in sequence by injection molding. A fixing plate 25 is fixedly provided on the side of the lower shell 2 close to the substrate layer 11, and the ceiling body 1 is provided with a bonding area 15 corresponding to the fixing plate 25. The fixing plate 25 is located in the bonding area 15 and is attached to the substrate layer 11. The fixing plate 25 is fixedly connected to the substrate layer 11 by bonding or welding, so that the lower shell 2 is connected to the ceiling body 1.

[0039] Reference Figure 2 and Figure 3A weakened portion 4 is provided between the upper shell 3 and the lower shell 2. The weakened portion 4 is located at the end surface of the lower shell 2 close to the upper shell 3 and is formed by an annular groove surrounding the upper shell 3. The weakened portion 4 is used to reduce the thickness of the connection between the upper shell 3 and the lower shell 2, thereby reducing the connection strength between the upper shell 3 and the lower shell 2. When the upper shell 3 and the lower shell 2 are both subjected to an external force moving away from each other, and the magnitude of the external force is greater than the connection strength of the weakened portion 4, the upper shell 3 and the lower shell 2 are separated along the annular groove. It should be noted that the ability of the weakened portion 4 to withstand external forces is less than the impact force generated during the explosion of the side air curtain.

[0040] Reference Figure 2 and Figure 4 A buffer connection is provided between the upper shell 3 and the lower shell 2. The buffer connection includes a plurality of flexible ties 51. The number of the flexible ties 51 is at least one. In this embodiment, two flexible ties 51 are used as an example for description. One end of the flexible ties 51 is fixedly connected to the upper shell 3, and the other end is fixedly connected to the lower shell 2. The connection method can be welding, adhesive connection, bolt connection or other methods. In this embodiment, the flexible ties 51 are integrally formed with the upper shell 3 and the lower shell 2 by injection molding.

[0041] Reference Figure 2 and Figure 4 A mounting cavity 31 is provided on one side of the upper shell 3 close to the lower shell 2, a cavity 21 communicating with the mounting cavity 31 is provided on the lower shell 2, a through opening 13 communicating with the cavity 21 is provided on the ceiling body 1, a fixing bolt 32 is provided in the mounting cavity 31, and a connecting port adapted to the fixing bolt 32 is provided on the upper shell 3. When installing the ceiling body 1, the operator passes the fixing bolt 32 through the through opening 13 and the cavity 21 and connects it with the automobile sheet metal thread, thereby connecting the upper shell 3 to the automobile sheet metal.

[0042] Reference Figure 3 and Figure 4 A decorative cover plate 6 is provided on the side of the surface finishing layer 12 facing away from the base material layer 11, and a pre-connection structure 62 is fixedly provided on the side of the decorative cover plate 6 close to the surface finishing layer 12. The pre-connection structure 62 and the decorative cover plate 6 are integrally formed by injection molding, and both are made of PP-TD20 material, with good toughness and deformability. The ceiling body 1 is provided with a mounting hole 14 connected to the cavity 21. In the initial state, the pre-connection structure 62 passes through the mounting hole 14 and extends to the inside 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 a deformable material, and the maximum diameter of the blocking structure 621 is greater than the diameter of the mounting hole 14, thereby preventing the pre-connection structure 62 from detaching from the mounting hole 14.

[0043] Reference Figure 3 and Figure 4The decorative cover plate 6 is also fixedly connected to a side close to the ceiling body 1 with a plurality of claws 61, and the lower shell 2 is provided with a card interface 22 connected to the cavity 21, and the card interface 22 corresponds to the claws 61 one by one. After the upper shell 3 is mounted on the automobile sheet metal by the fixing bolts 32, the operator moves the decorative cover plate 6 to the through opening 13, so that the claws 61 pass through the through opening 13 and the cavity 21 and snap into the card interface 22. At this time, the claws 61 snap into the lower shell 2, so that the lower shell 2 positions the decorative cover plate 6. At this time, the decorative cover plate 6 blocks the through opening 13 and the mounting hole 14, which is conducive to reducing the probability of foreign debris entering between the substrate layer 11 and the automobile sheet metal.

[0044] Reference Figure 3 and Figure 4 The lower shell 2 is provided with an avoidance hole 23 connected to the cavity 21. When the claw 61 is engaged with the lower shell 2, the blocking structure 621 is located in the avoidance hole 23. The lower shell 2 is fixedly connected with guard plates 24 on both sides along the length direction of the avoidance hole 23. The blocking structure 621 is located between the two guard plates 24. The guard plates 24 are conducive to reducing the probability of deformation of the blocking structure 621 due to extrusion. A placement groove adapted to the decorative cover plate 6 is provided on the side of the fixing plate 25 close to the base material layer 11. The ceiling body 1 is recessed into the placement groove to form a sinking structure 16 adapted to the decorative cover plate 6. The decorative cover plate 6 is located in the sinking structure 16 and fits with the surface finishing layer 12, thereby improving the aesthetics of the decorative cover plate 6 while reducing the probability of the decorative cover plate 6 being hit from the side, thereby improving the installation stability of the decorative cover plate 6.

[0045] The implementation principle of Example 1 is as follows: the side air curtain is installed between the base material layer 11 and the automobile sheet metal. When the vehicle is hit and the side air curtain explodes, the unfolded side air curtain pushes the roof body 1 in the direction away from the automobile sheet metal. Under the connection between the base material layer 11 and the fixing plate 25, the roof body 1 applies a pulling force to the lower shell 2 away from the upper shell 3 when moving. The structural strength of the weakened portion 4 is lower than the pulling force exerted on the lower shell 2 after the side air curtain explodes. Then, after the side air curtain explodes, the upper shell 3 and the lower shell 2 are separated along the weakened portion 4, so that the roof body 1 is separated from the automobile sheet metal, making it easy for the side air curtain to escape smoothly. When the upper shell 3 is separated from the lower shell 2, the flexible tether 51 gradually unfolds and deforms, and the flexible tether 51 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 tether 51, which helps to prevent the ceiling body 1 from excessively flying away. At the same time, during the explosion of the side air curtain, if the claw 61 of the decorative cover 6 is detached from the card interface 22, the blocking structure 621 cooperates with the pre-connection structure 62 to buffer and limit the decorative cover 6, thereby reducing the probability of the decorative cover 6 flying away. While improving the stability of the ceiling installation, the convenience of removing the side air curtain is improved.

[0046] Embodiment 2: Reference Figure 5 , the difference between this embodiment and embodiment 1 is that: the position of the weakened portion 4 is different. In this embodiment, the end surface surrounded by the annular groove is arranged perpendicular to the fixing bolt 32, and the upper shell 3 is fixedly connected with a plurality of abutment blocks 33 along the circumference of the annular groove. The abutment blocks 33 are located in the annular groove and abut against the lower shell 2. The abutment blocks 33 are connected to the upper shell 3 by bonding or welding after the upper shell 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 shell 2 to approach the upper shell 3, the abutment blocks 33 will block the lower shell 2, thereby reducing the probability of the lower shell 2 approaching the upper shell 3 and separating along the weakened portion 4 due to pressure while maintaining the normal operation of the weakened portion 4, thereby improving the working stability of the upper shell 3 and the lower shell 2.

[0047] Embodiment 3: Reference Figure 6 The difference between this embodiment and embodiment 1 is that the position of the weakened portion 4 is different. In this embodiment, the end surface where the annular groove is located is located in the cavity 21 and is located at the end of the upper shell 3 close to the lower shell 2. A plurality of connecting rings 41 are stacked in the annular groove, one side of the connecting ring 41 is in contact with the upper shell 3, and the other side is in contact with the lower shell 2. A connecting groove 43 is provided on the side of the upper shell 3 and the lower shell 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, which is used to fix the connecting ring 41 with the upper shell 3 and the lower shell 2.

[0048] In the initial state, the connecting ring 41 is separated from the upper shell 3 and the lower shell 2, so that it is convenient for the operator to remove the connecting ring 41 from the annular groove. The connecting ring 41 is provided with a disconnection port, and a pull ring 42 is fixed at the disconnection port. The disconnection port 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 shell 3 and the lower shell 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 suitable for different working environments, which is conducive to improving the convenience of using the upper shell 3 and the lower shell 2.

[0049] Embodiment 4: Reference Figure 7 The difference between this embodiment and the first embodiment is that a reinforcement ring 7 is provided in the installation cavity 31. The reinforcement ring 7 is made of metal and fits with the inner wall of the installation cavity 31. A contact plate 71 is fixedly provided on the side of the reinforcement ring 7 away from the lower shell 2. The contact plate 71 is clamped or bonded with the upper shell 3 so that the contact plate 71 fits with the upper shell 3. The contact plate 71 is provided with a circular hole adapted to the fixing bolt 32. The fixing bolt 32 passes through the circular hole and the upper shell 3 and is threadedly connected with the automobile sheet metal.

[0050] A positioning ring 72 is provided on the side of the reinforcement ring 7 away from the abutment plate 71. The positioning ring 72 is located in the cavity 21 and abuts against the side wall of the cavity 21 close to the upper shell 3. The positioning ring 72 and the reinforcement ring 7 are separately provided, and a connecting belt 73 is provided between the positioning ring 72 and the reinforcement ring 7. The connecting belt 73 is located inside the positioning ring 72 and is fixedly connected to the positioning ring 72 and the reinforcement ring 7 by bonding. The connecting belt 73 is provided with a break, and a disassembly roller 74 is fixedly provided at one end of the connecting belt 73 close to the break, and the disassembly roller 74 is parallel to the fixing bolt 32.

[0051] In the initial state, the positioning ring 72 is connected to the reinforcement ring 7 through the connecting belt 73. At this time, the positioning ring 72 limits the tendency of the lower shell 2 to separate from the upper shell 3, thereby improving the structural strength of the upper shell 3 and the lower shell 2 during transportation and storage. After the upper shell 3 is installed on the automobile sheet metal, the operator can rotate the disassembly roller 74 and remove the connecting belt 73 through the disassembly roller 74, so that the positioning ring 72 is separated from the reinforcement ring 7, thereby releasing the restriction on the lower shell 2. After removing the connecting belt 73, the reinforcement ring 7 and the abutment plate 71 both stay in the installation cavity 31, which is conducive to improving the structural strength of the upper shell 3, reducing the probability of the upper shell 3 being broken due to external force after the side air curtain explodes, and further improving the safety of the roof body 1.

[0052] Embodiment 5: Reference Figure 8 The difference between this embodiment and embodiment 1 is that the structure of the buffer connector is different. In this embodiment, the buffer connector includes a plurality of adjustment straps 52, one end of the adjustment strap 52 is fixedly connected to the upper shell 3, and the other end is free to move. The lower shell 2 is provided with a limiting hole 211 corresponding to the adjustment strap 52, and the diameter of the limiting hole 211 is larger than the diameter of the adjustment strap 52. The adjustment strap 52 is evenly fixed with a plurality of spherical portions 521 along the length direction, and the maximum diameter of the spherical portion 521 is larger than the diameter of the limiting hole 211.

[0053] The spherical portion 521 and the adjustment strap 52 are both made of a deformable material, such as plastic, and a deformation groove 522 is provided on the side of the spherical portion 521 close to the upper shell 3. The spherical portion 521 passes through the limiting hole 211 and moves into the cavity 21. During the movement, the spherical portion 521 is deformed and gathers and shrinks into the deformation groove 522. After passing through the limiting hole 211, the spherical portion 521 recovers due to its own elasticity. An elastic limiting ring 523 is provided in the cavity 21. The elastic limiting ring 523 is sleeved on the outside of the adjustment strap 52 and is located on the side of the spherical portion 521 closest to the limiting hole 211 facing the upper shell 3.

[0054] When the lower shell 2 is separated from the upper shell 3, the upper shell 3 drives the spherical part 521 to detach from the cavity 21 through the adjustment tie 52. When the spherical part 521 moves, it drives the elastic limit ring 523 to contact the inner wall of the cavity 21. At this time, the elastic limit ring 523 prevents the spherical part 521 from continuing to move, 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 tie 52 to adjust the length of the adjustment tie 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 is conducive to improving the convenience of using the ceiling body 1.

[0055] The present application also discloses a method for manufacturing a ceiling that prevents splashing objects when a side curtain explodes, comprising the following steps: Material preparation 1: Glue coating is performed on the finishing layer 12 and the base material layer 11; Material preparation 2: preparing the upper shell 3 and the lower shell 2 by injection molding; 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; Punching: Punching and punching are performed on the pressed ceiling material to form a through opening 13 and a mounting hole 14 on the ceiling body 1; Installation accessory 1: First, place the decorative cover plate 6 on the side of the decorative layer away from the base material layer 11, and make the blocking structure 621 pass through the installation hole 14 to connect the decorative cover plate 6 with the ceiling body 1; Installation accessory 2: Coat the surface of the bonding area 15 with adhesive, place the fixing plate 25 into the bonding area 15, and fix the fixing plate 25 to the substrate layer 11 through the adhesive; Post-processing: hot stamping or laser engraving is performed on the finishing layer 12 .

[0056] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A ceiling for preventing splashing objects when a side curtain explodes, comprising a ceiling body (1), wherein the ceiling body (1) comprises a surface finishing layer (12) and a base material layer (11), wherein the base material layer (11) is fixedly connected to the surface finishing layer (12) and is used to be connected to a car sheet metal, and wherein: 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 weakened portion (4) is provided between the upper shell (3) and the lower shell (2); the weakened 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) to push the upper shell When an external force is applied to separate the upper shell (3) from the lower shell (2), and the magnitude of the external force exceeds the bearing range of the weakened portion (4), the upper shell (3) and the lower shell (2) are separated with the weakened portion (4) as the center, and a buffer connection is provided between the lower shell (2) and the upper shell (3). When the upper shell (3) and the lower shell (2) are separated from each other, the buffer connection is used to buffer the force between the upper shell (3) and the lower shell (2), and to limit the distance between the upper shell (3) and the lower shell (2) after separation.

2. The ceiling for preventing splashing objects when side curtains are blasted according to claim 1, characterized in that: 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) in communication with the installation cavity (31) is provided inside the lower shell (2), a through opening (13) in communication with the cavity (21) is provided in the ceiling body (1), the fixing bolt (32) passes through the through opening (13) of the ceiling body (1) and the lower shell (2) in sequence, and is connected to the automobile sheet metal thread through the upper shell (3), and the surface is decorated The side of the layer (12) facing away from the base material layer (11) is in contact with a decorative cover plate (6), and the side of the decorative cover plate (6) close to the surface finishing layer (12) is provided with a plurality of clamping claws (61). The lower shell (2) is opened with a plurality of clamping interfaces (22) in a circumferential direction and connected with the cavity (21). 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).

3. The ceiling for preventing splashing objects when side curtains are blasted according to claim 2, characterized in that: The decorative cover plate (6) is also provided with a pre-connection structure (62) on one 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) connected to 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).

4. The ceiling for preventing splashing objects during side curtain explosion according to claim 1 is characterized in that: An annular groove is opened along 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) so that a weakened portion (4) is formed at the connection between the upper shell (3) and the lower shell (2).

5. The ceiling for preventing splashing objects during side curtain explosion according to claim 4 is characterized by: The outer edge surface of the annular groove is perpendicular to the end surface of the upper shell (3) close to the lower shell (2); the upper shell (3) is fixedly provided with a plurality of abutment blocks (33) along the circumference of the annular groove; the side of the lower shell (2) facing away from the substrate layer (11) abuts against the abutment blocks (33).

6. The ceiling for preventing splashing objects during side curtain explosion according to claim 4, characterized in that: The annular groove is located on the end surface of the upper shell (3) close to the lower shell (2) and is connected to the outside through the lower shell (2). A plurality of connecting rings (41) are stacked in the annular groove. One side of the connecting ring (41) is in contact with the upper shell (3), and the other side is in contact with the lower shell (2). The upper shell (3) and the lower shell (2) are both provided with connecting grooves (43) in contact with the annular groove at one end close to the connecting ring (41). The connecting grooves (43) are filled with connecting pieces (44). The connecting ring (41) is connected to the upper shell (3) and the lower shell (2) through the connecting piece (44). The connecting ring (41) is provided with a disconnection port, and a pull ring (42) is fixedly provided at one end of the connecting ring (41) close to the disconnection port.

7. The ceiling for preventing splashing objects when side curtains are blasted according to claim 1, characterized in that: The buffer connection member comprises a plurality of flexible ties (51), one end of the flexible ties (51) is fixedly connected to the upper shell (3), and the other end is fixedly connected to the lower shell (2), the flexible ties (51), the upper shell (3) and the lower shell (2) are made of the same material and are integrally formed by injection molding.

8. The ceiling for preventing splashing objects when side curtains are blasted according to claim 1, characterized in that: The buffer connection member comprises a plurality of adjustment straps (52), one end of the adjustment straps (52) is fixedly connected to the upper shell (3), the lower shell (2) is provided with a limiting hole (211) communicating with the cavity (21), the adjustment straps (52) are fixedly provided with a plurality of spherical parts (521) along the length direction, the spherical parts (521) and the adjustment straps (52) are both made of deformable material by injection molding, the maximum diameter of the spherical parts (521) is greater than the diameter of the limiting hole (211), a deformation groove (522) is provided on one side of the spherical part (521) close to the upper shell (3) with the adjustment strap (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 on the outer side of the adjustment strap (52), the elastic limiting ring (523) is located in the deformation groove (522) and fits with the inner wall of the deformation groove (522).

9. The ceiling for preventing splashing objects when the side curtain explodes according to claim 2 is characterized by: A reinforcement ring (7) is arranged in the installation cavity (31); an abutment plate (71) is fixedly arranged at one end of the reinforcement ring (7) away from the lower shell (2); the abutment plate (71) is clamped with the upper shell (3); a fixing bolt (32) passes through the abutment plate (71) and is rotatably connected with the abutment plate (71); a positioning ring (72) is arranged at one end of the reinforcement ring (7) away from the abutment plate (71); the positioning ring (72) is located in the cavity (21) and is in contact with the inner wall of the cavity (21); a connecting belt (73) is fixedly arranged on one side of the reinforcement ring (7) close to its own axis; a fracture is opened in the connecting belt (73) along the axis direction of the reinforcement ring (7); a disassembly roller (74) is fixedly arranged at the fracture of the connecting belt (73); and the positioning ring (72) is sleeved on the outside of the connecting belt (73) and is fixedly connected with the connecting belt (73).

10. A method for manufacturing a ceiling, applied to a ceiling for preventing splashing objects when a side curtain is blasted as claimed in any one of claims 1 to 9, characterized in that: The steps include: Material preparation 1: applying glue to the finishing layer (12) and the base material layer (11); Material preparation 2: preparing the upper shell (3) and the lower shell (2) by injection molding; Pressing and forming: stacking the substrate layer (11) and the surface finishing layer (12) in sequence and pressing and forming them by a pressing device; Punching: Punching and punching on the pressed ceiling material; Installing accessories: installing the lower shell (2) and the upper shell (3) onto the ceiling body (1); Post-processing: hot stamping or laser engraving is performed on the finishing layer (12).

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