Interior trim panel for vehicle

Abstract

The utility model discloses an interior panel for a vehicle. The interior trimming panel comprises a base plate. The base plate comprises a first surface and a second surface opposite to the first surface, and a weakening line limiting the air bag door is arranged on the base plate. The weakening line comprises a first weakening groove, a second weakening groove and a connecting bridge. The first weakening groove is formed in the first surface and extends towards the second surface, the second weakening groove is formed in the second surface and extends towards the first surface, the first weakening groove and the second weakening groove are at least partially opposite in the thickness direction of the substrate, and the connecting bridge is connected between the groove bottom of the first weakening groove and the groove bottom of the second weakening groove. In this way, the first weakening groove and the second weakening groove jointly reduce the strength of the weakening line, so that both the first weakening groove and the second weakening groove can be configured to have a smaller depth. And for the substrate formed by injection molding, the demolding difficulty in the injection molding process is reduced.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to an interior trim panel for a vehicle. Background Art

[0002] Vehicles are usually equipped with an airbag and an interior panel covering the airbag. The interior panel has a base plate, and a weakened line defining an airbag door is provided on the base plate. When the airbag is inflated, it impacts the interior panel, causing the base plate (or interior panel) to tear along the weakened line, the airbag door opens, and the airbag then passes through the airbag door and bounces into the interior of the vehicle.

[0003] Generally, the weakening line is configured as a weakening groove extending from the inner surface of the substrate (i.e., the surface facing away from the interior of the vehicle compartment) toward the outer surface of the interior trim panel (i.e., the surface facing the interior of the vehicle compartment), and there is no weakening groove on the outer surface of the substrate. This requires the weakening groove to be deeper so that the strength of the weakening line is lower. For the injection-molded substrate, a deeper weakening groove will make it more difficult to demold during the injection molding process. Utility Model Content

[0004] In view of the above technical problems, the present application proposes an interior trim panel for a vehicle. The interior trim panel comprises a substrate; the substrate comprises a first surface and a second surface opposite to the first surface; a weakening line is arranged on the substrate, the weakening line defines an airbag door, and the weakening line comprises: a first weakening groove formed on the first surface and extending toward the second surface; a second weakening groove formed on the second surface and extending toward the first surface; the first weakening groove and the second weakening groove are at least partially opposite to each other along the thickness direction of the substrate; and a connecting bridge connected between the groove bottom of the first weakening groove and the groove bottom of the second weakening groove.

[0005] In one embodiment, the weakening line includes a first weakening line extending along the edge of the airbag door, the first weakening line includes two first extension segments opposite to each other and a second extension segment connected to the two first extension segments; the substrate is also constructed with a second weakening line extending through the airbag door, and both ends of the second weakening line are respectively connected to the two first extension segments; the two first extension segments and the second weakening line have a first weakening structure, and the second extension segment has a second weakening structure; the strength of the second weakening structure is greater than the strength of the first weakening structure.

[0006] In one embodiment, the first weakening structure includes: a plurality of spaced-apart first connection areas, each first connection area including a first groove segment as a first weakening groove, a second groove segment as a second weakening groove, and a first connection bridge as a connection bridge; and a plurality of first through holes, each first through hole being located between two adjacent first connection areas.

[0007] In one embodiment, the length of each first connecting bridge is smaller than the length of each first through hole.

[0008] In one embodiment, the first groove section and / or the second groove section is a groove with a pointed bottom.

[0009] In one embodiment, the second weakened structure includes a third groove segment as the first weakened groove, a fourth groove segment as the second weakened groove, and a second connecting bridge as the connecting bridge.

[0010] In one embodiment, along the thickness direction of the substrate, the thickness of the second connecting bridge is greater than the thickness of the first connecting bridge.

[0011] In one embodiment, the length of the second connecting bridge is greater than the length of the first connecting bridge.

[0012] In one embodiment, the third groove segment and / or the fourth groove segment is a groove with a pointed bottom.

[0013] In one embodiment, the depth of any one of the first weakened groove and the second weakened groove is between 0.05 mm and 2 mm, and the opening width is between 0.4 mm and 2 mm.

[0014] In one embodiment, along the thickness direction of the substrate, the thickness of the connecting bridge is less than 4 mm.

[0015] In one embodiment, the interior trim panel further includes a covering layer disposed on the first surface of the substrate.

[0016] In one embodiment, the covering layer includes an elastic filling layer and a skin layer covering the filling layer.

[0017] In one embodiment, the filling layer at least partially fills the first weakened groove.

[0018] The beneficial effects of the present application are as follows: According to the interior trim panel for a vehicle of the present application, a weakening line defining an airbag door is constructed on the substrate of the interior trim panel. The weakening line includes a first weakening groove and a second weakening groove respectively arranged on two opposite surfaces of the substrate, and the first weakening groove and the second weakening groove are at least partially opposite. In this way, the first weakening groove and the second weakening groove jointly reduce the strength of the weakening line, so that the first weakening groove and the second weakening groove can be constructed to have a smaller depth to reduce the strength of the weakening line to a desired degree. For an injection molded substrate, this reduces the difficulty of demolding during the injection molding process. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present application will be further described in the following detailed description by means of non-limiting examples of typical embodiments of the present application based on a number of drawings, which are not drawn to scale.

[0020] Figure 1 A vehicle according to one embodiment of the present application is schematically shown.

[0021] Figure 2 A cross-sectional view of an interior trim panel for a vehicle according to one embodiment of the present application is schematically shown.

[0022] Figure 3 An exploded view of an interior trim panel according to one embodiment is schematically shown, showing a first embodiment of a line of weakness.

[0023] Figure 4a Schematically shows Figure 3 The weakening line shown in .

[0024] Figure 4b A second embodiment of a line of weakness is schematically shown.

[0025] Figure 4c A third embodiment of a line of weakness is schematically shown.

[0026] Figure 5 yes Figure 4a Enlarged view of part I.

[0027] Figure 6 Schematically shows Figure 4a AA cross-section diagram in.

[0028] Figure 7 Schematically shows Figure 4a The CC cross-sectional view in FIG. 1 is a cross-sectional view of an embodiment of the second extension segment.

[0029] Figure 8 A cross-sectional view of another embodiment of the second extension is schematically shown.

[0030] Fig. 9 Schematically shows Figure 4a BB cross-section diagram in.

[0031] Reference numerals list

[0032] 1 Vehicle

[0033] 2 Pillar interior panel

[0034] 3. Dashboard

[0035] 30 substrates

[0036] 301 first surface 302 second surface

[0037] 303 airbag door 305 first door panel

[0038] 306 second door panel 307 weakening line

[0039] 31 First weakening line

[0040] 32 Second weakening line

[0041] 321 first connection area 322 first through hole

[0042] 323 first slot section 324 second slot section

[0043] 325 first connecting bridge 326 bottom of the first groove section

[0044] 327 Bottom of the second trough section

[0045] 33 The first extension

[0046] 331 first section 332 second section

[0047] 333 The third section 334 The turning point of the first section

[0048] 335 Turning point of the second section

[0049] 34 Second extension

[0050] 343 third slot section 344 fourth slot section

[0051] 345 second connecting bridge 346 bottom of the third trough section

[0052] 347 The bottom of the fourth trough section

[0053] 35 Overlay

[0054] 351 filling layer 352 epidermis layer

[0055] S Interior panel D Thickness direction of base plate DETAILED DESCRIPTION

[0056] In order to make the purpose, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be clearly and completely described below in conjunction with the specific embodiments of the present application and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

[0057] Unless otherwise specified, in the present application, the surface of the panel facing the interior of the vehicle compartment is referred to as the outer surface, and the surface facing away from the interior of the vehicle compartment is referred to as the inner surface, that is, the outer surface is opposite to the inner surface.

[0058] Figure 1 A vehicle 1 according to an embodiment of the present application is schematically shown. Figure 1As shown, the vehicle 1 includes a plurality of interior panels S, such as an instrument panel 3 and a pillar interior panel 2. Usually, an airbag is provided in the vehicle 1 (not shown). For example, the airbag is provided at the passenger seat inside the vehicle and is covered by the instrument panel 3. An airbag door 303 (such as Figure 3 As shown in the figure, the airbag can break through the airbag door and quickly pop out into the vehicle compartment when necessary. It should be understood that the airbag can also be arranged at the pillar, and the airbag is covered by the pillar interior panel 2. For simplicity, the technical solution of the present application is described below by taking the instrument panel 3 as an example.

[0059] Figure 2 The structure of the instrument panel 3 is schematically shown. Figure 2 As shown, the instrument panel 3 includes a substrate 30 and a covering layer 35 provided on the substrate 30. For example, the substrate 30 includes a first surface 301 and a second surface 302 opposite to the first surface 301. The first surface 301 generally faces the interior of the vehicle compartment and forms an outer surface of the substrate 30; accordingly, the second surface 302 forms an inner surface of the substrate 30. The covering layer 35 is provided on the first surface 301 of the substrate 30.

[0060] Also like Figure 2 and Figure 3 As shown, the covering layer 35 includes an elastic filling layer 351 and a skin layer 352. The filling layer 351 is covered on the first surface 301 of the substrate 30; the skin layer 352 is covered on the filling layer 351 and forms the outer surface of the instrument panel 3. The skin layer 352 is, for example, genuine leather or synthetic leather. The filling layer 351 is, for example, a three-dimensional mesh fabric (3D mesh), foam, etc. The filling layer 351 has good elasticity to compensate for defects such as depressions on the first surface 301 of the substrate 30 and avoid bad marks on the outer surface of the instrument panel 3. In one embodiment, the thickness of the filling layer 351 is between 2 mm and 5 mm.

[0061] In one embodiment, the covering layer can also be made of composite leather, for example, the composite leather includes elastic foam and polyvinyl chloride combined together. It should be understood that the composite leather can also be made of other appropriate materials, which will not be described in detail here.

[0062] Also like Figure 3 As shown in FIG. 1 , a weakened line 307 is provided on the base plate 30, and the weakened line 307 defines the air bag door 303. Specifically, as shown in FIG. Figure 3 and Figure 4aAs shown, the weakened line 307 includes a first weakened line 31 extending into a closed shape along the edge of the airbag door 303 and a second weakened line 32 extending through the airbag door 303, and both ends of the second weakened line 32 are respectively connected to the first weakened line 31. The strength at the first weakened line 31 and the second weakened line 32 is less than the strength of the rest of the substrate 30. When the airbag is inflated, the substrate 30 is impacted by the airbag and is torn along the first weakened line 31 and the second weakened line 32, so that the airbag door 303 is opened, and the instrument panel 3 is also torn, so that the airbag can be smoothly ejected into the interior of the vehicle compartment.

[0063] like Figure 3 and Figure 4a As shown, the airbag door 303 is generally rectangular in shape. The first weakened line 31 is also generally rectangular and includes two first extensions 33 and two second extensions 34. The two first extensions 33 form two width edges of the airbag door 303, and the two second extensions 34 are connected to the corresponding ends of the two first extensions 33 and form two length edges of the airbag door 303. The first extension 33 has a first weakened structure, and the second extension 34 has a second weakened structure different from the first weakened structure. The strength of the second weakened structure is greater than the strength of the first weakened structure.

[0064] Also like Figure 4a As shown, the second weakened line 32 extends substantially parallel to the second extension section 34 through the airbag door 303 and is connected to the two first extension sections 33. For example, the two ends of the second weakened line 32 are respectively connected to the midpoints of the two first extension sections 33. In this way, the airbag door 303 is divided into two parts by the second weakened line 32 (i.e., Figure 4a In one embodiment, the second weakened line 32 also has the first weakened structure, which helps to simplify the manufacture of the substrate 30 (and the instrument panel 3).

[0065] Since the strength of the second weakening structure is greater than that of the first weakening structure (i.e., the strength of the two second extensions 34 of the first weakening line 31 is greater than that of the first extension 33 and also greater than that of the second weakening line 32), when the airbag is inflated and impacts the instrument panel 3 (or the substrate 30), the second weakening line 32 and the two first extensions 33 are broken by force, while the two second extensions 34 are temporarily not broken. In this way, the first door panel 305 and the second door panel 306 are respectively turned around with the two second extensions 34 as axes to open the airbag door 303. As the airbag passes through the airbag door 303 and pops out into the interior of the vehicle, the two second extensions 34 are finally broken by force, and the first door panel 305 and the second door panel 306 are separated from the instrument panel 3. During the whole process, the two second extension segments 34 break later than the second weakening line 32 and the two first extension segments 33, which makes the tearing process of the substrate 30 (or the dashboard 3) controllable, helping to avoid the first door panel 305 and / or the second door panel 306 from splashing disorderly after detaching from the dashboard 3 and causing danger.

[0066] Figure 4b A second embodiment of a line of weakness is schematically shown. Figure 4b As shown, the weakening line 307 of the second embodiment includes a first extension section 33 which is generally U-shaped and a second extension section 34 connected between the two ends of the first extension section 33. In one embodiment, the first extension section 33 has the first weakening structure described above, and the second extension section 34 has the second weakening structure described above. In this way, when the weakening line 307 is subjected to force, the first extension section 33 breaks first, and then the second extension section 34 breaks.

[0067] Figure 4c A fourth embodiment of a weakening line is schematically shown. The weakening line 307 of the fourth embodiment includes a second extension section 34 that is generally rectangular and a first extension section 33 that is generally double Y-shaped and is within the range defined by the second extension section 34. The first extension section 33 includes a first section 331 in the shape of a broken line, a second section 332 in the shape of a broken line, and a third section 333 connected between a folding point 334 of the first section and a folding point 335 of the second section. The two end points of the first section 331 are respectively connected to two adjacent vertices of the rectangle, and the two end points of the second section 332 are respectively connected to the other two adjacent vertices of the rectangle. In one embodiment, the first extension section 33 has the first weakening structure described above, and the second extension section 34 has the second weakening structure described above. In this way, when the weakening line 307 is subjected to force, the first extension section 33 breaks first, and then the second extension section 34 breaks. It should be understood that, according to actual conditions, the weakening line can also be constructed in other forms, which will not be described here. For simplicity, the following will be described with Figure 4a The weakened lines shown are used to describe the technical solution of the present application.

[0068] The first weakening structure is described below by taking the second weakening line 32 as an example.

[0069] like Figure 4a and Figure 5 As shown, the first weakened structure includes a plurality of spaced-apart first connection areas 321 and a plurality of first through holes 322. The first through holes 322 penetrate the substrate 30 (eg Fig. 9 As shown), each first through hole 322 is located between two adjacent first connection areas 321.

[0070] like Figure 6 As shown, each first connection area 321 includes a first groove section 323, a second groove section 324 and a first connection bridge 325. The first groove section 323 is formed on the first surface 301 of the substrate 30 and extends toward the second surface 302 of the substrate 30. The second groove section 324 is formed on the second surface 302 of the substrate 30 and extends toward the first surface 301 of the substrate 30. The first groove section 323 and the second groove section 324 are directly opposite to each other along the thickness direction D of the substrate 30. The first connection bridge 325 is connected between the groove bottom 326 of the first groove section 323 and the groove bottom 327 of the second groove section 324, that is, the thickness of the first connection bridge 325 is less than the thickness of the substrate 30. In addition, as shown in Figure 5 As shown, along the extension direction of the second weakened line 32, the first connecting bridge 325 is not continuous, but is divided into multiple sections by the first through holes 322. In this way, the second weakened line 32 has a relatively small strength, so that the airbag door 303 is easily torn open along the second weakened line 32 when the airbag is inflated and opened.

[0071] In addition, in the prior art, only a deeper weakening groove (for example, the depth can be 3mm) is constructed on the inner surface of the substrate to reduce the strength of the weakening line, but the deeper weakening groove will cause greater difficulty in demoulding during the injection molding process of the substrate. Compared with the prior art, in the present application, the first groove section 323 (or the first weakening groove) and the second groove section 324 (or the second weakening groove) jointly reduce the strength of the second weakening line 32. In this way, the first groove section 323 and the second groove section 324 can be constructed to have a smaller depth (for example, the depth can be between 0.05mm and 2mm) to reduce the strength of the second weakening line 32 to a desired degree. For the injection molded substrate 30, the first groove section 323 and the second groove section 324 with a smaller depth reduce the difficulty of demoulding during the injection molding process.

[0072] In one embodiment, the depth of the first groove section 323 on the first surface 301 of the substrate 30 can be between 0.05 mm and 2 mm, and the opening width can be between 0.4 mm and 2 mm; the same is true for the depth and opening width of the second groove section 324. The substrate 30 having the first groove section 323 and the second groove section 324 of this structure is also easy to demold during injection molding. In addition, the opening width and depth of the first groove section 323 are both small, so that it is not easy to produce bad marks on the outer surface of the instrument panel 3. Moreover, after the filling layer 351 is set on the first surface 301 of the substrate 30, the filling layer 351 will cover the first groove section 323 or fill at least part of the first groove section 323, which further prevents the generation of bad marks on the outer surface of the instrument panel 3. In one embodiment, the depth of the first groove section 323 is 1 mm, and the opening width is 0.8 mm.

[0073] In one embodiment, along the thickness direction D of the substrate 30, the thickness of the first connecting bridge 325 is less than 4 mm, for example, between 0.5 mm and 4 mm. In this way, the second weakening line 32 has an appropriate strength, and when the airbag is not inflated, the substrate 30 (or the instrument panel 3) can withstand a certain external force and the airbag door 303 will not open, thereby avoiding accidental damage to the instrument panel 3. Moreover, during the injection molding process of the substrate 30, the first connecting bridge 325 of such thickness can avoid short shots at the first groove section 323 and the second groove section 324 during the injection molding process, and can also avoid the airbag door 303 from warping and deforming relative to the rest of the substrate 30.

[0074] Also like Figure 5 As shown, along the extension direction of the second weakening line 32, the length of each first connecting bridge 325 is less than the length of each first through hole 322. In this way, the thickness of the first connecting bridge 325 is small and the length is also short, which further reduces the strength of the second weakening line 32. In a specific embodiment, the length of the first connecting bridge 325 is between 1 mm and 10 mm, and the length of the first through hole 322 is between 15 mm and 40 mm. The specific values ​​of the first connecting bridge and the first through hole can be set according to actual conditions, and are not limited here.

[0075] Also like Figure 6As shown, the first groove section 323 and the second groove section 324 are both pointed bottom grooves. In this way, when the airbag is inflated and impacts the substrate 30, stress concentration is easily generated at the groove bottom 326 of the first groove section 323 and / or the groove bottom 327 of the second groove section 324, which helps to quickly break the first connecting bridge 325 connected between the groove bottom 326 of the first groove section 323 and the groove bottom 327 of the second groove section 324. In one embodiment, the first groove section 323 and the second groove section 324 are both V-shaped grooves or wedge-shaped grooves with pointed bottoms. In some other embodiments, only one of the first groove section and the second groove section can be constructed as a pointed bottom groove according to actual conditions; for example, only the second groove section can be constructed as a pointed bottom groove.

[0076] The second weakening structure is described below by taking a second extension section 34 as an example.

[0077] like Figure 7 As shown, the second weakening structure includes a third slot section 343, a fourth slot section 344 and a second connecting bridge 345. Similar to the first weakening structure, the third slot section 343 is formed on the first surface 301 of the substrate 30 and extends toward the second surface 302 of the substrate 30. The fourth slot section 344 is formed on the second surface 302 of the substrate 30 and extends toward the first surface 301 of the substrate 30. The third slot section 343 and the fourth slot section 344 are directly opposite along the thickness direction D of the substrate 30. The second connecting bridge 345 is connected between the slot bottom 346 of the third slot section 343 and the slot bottom 347 of the fourth slot section 344. Similar to the first weakening structure, the third slot section 343 and the fourth slot section 344 have a smaller depth and jointly reduce the strength of the second extension section 34 to a desired degree. For the injection molded substrate 30, the third slot section 343 and the fourth slot section 344 with a smaller depth reduce the difficulty of demoulding during the injection molding process.

[0078] In one embodiment, the thickness of the second connecting bridge 345 is less than 4 mm, for example, between 0.5 mm and 4 mm, along the thickness direction D of the substrate 30. Similar to the second weakened line 32, the second connecting bridge 345 of such thickness also enables the first weakened line 31 to have a suitable strength, and, during the injection molding process of the substrate 30, avoids short shots at the third groove section 343 and the fourth groove section 344, and also avoids warping and deformation of the airbag door 303 relative to the rest of the substrate 30.

[0079] Along the thickness direction D of the substrate 30, the thickness of the second connecting bridge 345 is greater than the thickness of the first connecting bridge 325. In this way, the strength of the second connecting bridge 345 is greater than the strength of the first connecting bridge 325, thereby achieving that the strength of the second weakening structure is greater than the strength of the first weakening structure. In one embodiment, the thickness of the second connecting bridge 345 is 1.5 mm, and the thickness of the first connecting bridge 325 is 0.9 mm. Of course, the thickness of the first connecting bridge and the thickness of the second connecting bridge can also be set to other values ​​according to actual conditions, which are not limited here.

[0080] In addition, the length of the second connecting bridge 345 is greater than the length of the first connecting bridge 325, which also makes the strength of the second weakening structure greater than the strength of the first weakening structure. In one embodiment, the length of the second connecting bridge 345 is equal to or almost equal to the length of the second extension section 34. In other words, no through hole is provided in the second extension section 34. In some other embodiments, a second through hole (not shown in the figure) similar to the first through hole may also be provided in the second extension section to divide the second connecting bridge into multiple sections, as long as the strength of the second weakening structure is greater than the strength of the first weakening structure.

[0081] Also like Figure 7 As shown, the fourth slot section 344 is a pointed bottom slot, and the third slot section 343 is a flat bottom slot (for example, a rectangular slot or a trapezoidal slot). Similar to the first weakening structure, when the airbag inflates and impacts the substrate 30, stress concentration is likely to occur at the slot bottom 347 of the fourth slot section 344, thereby making the second extension section 34 easy to break quickly. In other embodiments, the fourth slot section 344 and the third slot section 343 may also be constructed as a pointed bottom slot. It should be noted that in the case where either the third slot section 343 or the fourth slot section 344 is a pointed bottom slot, the strength of the second weakening structure is still greater than the strength of the first weakening structure, so that the second extension section 34 breaks later than the second weakening line 32 and the two first extension sections 33, thereby better controlling the tearing process of the substrate 30 (or the instrument panel 3).

[0082] In one embodiment, Figure 8 As shown, the third groove section 343 and the fourth groove section 344 are both flat-bottom grooves. In this way, when the airbag inflates and impacts the substrate 30, stress concentration is not likely to occur at the groove bottom 346 of the third groove section 343 and the groove bottom 347 of the fourth groove section 344, which further helps to make the second extension section 34 break later than the second weakening line 32 and the two first extension sections 33, thereby better controlling the tearing process of the substrate 30 (or the instrument panel 3). In one embodiment, the third groove section 343 and the fourth groove section 344 can be implemented as rectangular grooves or trapezoidal grooves.

[0083] The depth of the third groove section 343 on the first surface 301 of the substrate 30 is also between 0.05 mm and 2 mm, and the opening width is also between 0.4 mm and 2 mm; the same is true for the depth and opening width of the fourth groove section 344. Similar to the first weakening structure, the substrate 30 having the third groove section 343 and the fourth groove section 344 of this structure is also easy to demold during injection molding. In addition, the third groove section 343 will not cause bad marks on the outer surface of the instrument panel 3. In a specific embodiment, the depth of the third groove section 343 is 0.75 mm, and the opening width is 0.8 mm.

[0084] Also like Figure 4a As shown, the first weakened line 31 (including two first extensions 33 and two second extensions 34) surrounds the airbag door 303. In this way, the first groove section 323 of the first extension section 33 and the third groove section 343 of the second extension section 34 completely separate the airbag door 303 from other parts of the outer surface of the substrate 30 (i.e., the first surface 301). When the substrate 30 (or the instrument panel 3) is torn, the cracks generated in the first weakened line 31 and the second weakened line 32 only extend along the first weakened line 31 and / or the second weakened line 32, and will not extend beyond the first weakened line 31 to other parts of the outer surface of the substrate 30 (e.g., the part surrounding the airbag door 303). In this way, no residual sheet will be generated in the part of the substrate 30 other than the airbag door 303, so as to avoid the danger caused by the residual sheet.

[0085] In one embodiment, the substrate 30 is formed by an injection molding process, and the first weakened line 31 and the second weakened line 32 are also formed by injection molding together with the substrate 30. In this way, there is no need to perform secondary weakening on the substrate 30, which reduces the manufacturing process of the substrate 30, improves production efficiency and reduces costs. There is also no need to transport the substrate 30 back and forth between various process locations, which reduces transportation costs and avoids damage to the substrate 30 during transportation.

[0086] It should be noted that the utility model (e.g., utility model concepts, etc.) has been described in the specification of this patent document and / or illustrated in the drawings according to the exemplary embodiments; the embodiments of the utility model are presented only by way of example and are not intended to limit the scope of the utility model. The structure and / or arrangement of the elements of the utility model concepts embodied in the utility model as described in the specification and / or illustrated in the drawings are only illustrative. Although the exemplary embodiments of the utility model have been described in detail in this patent document, it is easy for a person of ordinary skill in the art to understand that equivalents, modifications, changes, etc. of the subject matter of the exemplary embodiments and alternative embodiments are possible and are considered to be within the scope of the utility model; all of these subject matters (e.g., modifications, changes, embodiments, combinations, equivalents, etc.) are intended to be included within the scope of the utility model. It should also be noted that various / other modifications, changes, substitutions, equivalents, changes, omissions, etc. can be made in the configuration and / or arrangement of the exemplary embodiments (e.g., in terms of concepts, designs, structures, devices, forms, assemblies, constructions, means, functions, systems, processes / methods, steps, the order of process / method steps, operations, operating conditions, performance, materials, compositions, combinations, etc.). ) without departing from the scope of the present invention; all of these subjects (such as modifications, changes, embodiments, combinations, equivalents, etc.) are intended to be included within the scope of the present invention. The scope of the present invention is not intended to be limited to the subject matter described in the specification and / or drawings of this patent document (such as details, structures, functions, materials, behaviors, steps, sequences, systems, results, etc.). Considering that the claims of this patent document will be appropriately interpreted as covering the full scope of the subject matter of the present invention (for example, including any and all such modifications, changes, embodiments, combinations, equivalents, etc.); it should be understood that the terms used in this patent document are intended to provide a description of the subject matter of the exemplary embodiments, rather than as a limitation on the scope of the present invention.

[0087] It should also be noted that, according to the exemplary embodiments, the present invention may include conventional technologies (such as technologies implemented and / or integrated in the exemplary embodiments, modifications, changes, combinations, equivalents), or may include any other applicable technologies (now and / or in the future) with the ability to perform the functions and processes / operations described in the specification and / or illustrated in the figures. All of these technologies (such as technologies implemented in embodiments, modifications, changes, combinations, equivalents, etc.) are considered to be within the scope of the present invention of this patent document.

Claims

1. An interior trim panel for a vehicle, characterized in that: The interior trim panel includes a substrate; the substrate includes a first surface and a second surface opposite to the first surface; a weakening line is provided on the substrate, the weakening line defines an airbag door, and the weakening line includes: a first weakened groove formed on the first surface and extending toward the second surface; a second weakened groove formed on the second surface and extending toward the first surface; the first weakened groove and the second weakened groove are at least partially opposite to each other along the thickness direction of the substrate; and The connecting bridge is connected between the groove bottom of the first weakened groove and the groove bottom of the second weakened groove.

2. The interior trim panel according to claim 1, characterized in that: The weakened line comprises a first weakened line extending along the edge of the airbag door, wherein the first weakened line comprises two first extension segments opposite to each other and a second extension segment connected to the two first extension segments; The weakened line further includes a second weakened line extending through the airbag door, and two ends of the second weakened line are respectively connected to the two first extension segments; The two first extension segments and / or the second weakening line have a first weakening structure, and the second extension segment has a second weakening structure; the strength of the second weakening structure is greater than the strength of the first weakening structure.

3. The interior trim panel according to claim 2, characterized in that: The first weakening structure comprises: a plurality of spaced-apart first connection areas, each of the first connection areas comprising a first groove segment as the first weakened groove, a second groove segment as the second weakened groove, and a first connection bridge as the connection bridge; and A plurality of first through holes, each of which is located between two adjacent first connection areas.

4. The interior trim panel according to claim 3, characterized in that: The length of each of the first connecting bridges is smaller than the length of each of the first through holes.

5. The interior trim panel according to claim 3, characterized in that: The first groove section and / or the second groove section is a pointed bottom groove.

6. The interior trim panel according to claim 3, characterized in that: The second weakened structure includes a third groove segment as the first weakened groove, a fourth groove segment as the second weakened groove, and a second connecting bridge as the connecting bridge.

7. The interior trim panel according to claim 6, characterized in that: Along the thickness direction of the substrate, the thickness of the second connecting bridge is greater than the thickness of the first connecting bridge.

8. The interior trim panel according to claim 6 or 7, characterized in that: The length of the second connecting bridge is greater than that of the first connecting bridge.

9. The interior trim panel according to claim 6, characterized in that: The third groove section and / or the fourth groove section are pointed-bottom grooves.

10. The interior trim panel according to claim 1, characterized in that: The depth of any one of the first weakened groove and the second weakened groove is between 0.05 mm and 2 mm, and the opening width is between 0.4 mm and 2 mm.

11. The interior trim panel according to claim 1, characterized in that: Along the thickness direction of the substrate, the thickness of the connecting bridge is less than 4 mm.

12. The interior trim panel according to claim 1, characterized in that: The interior trim panel further includes a covering layer disposed on the first surface of the substrate.

13. The interior trim panel according to claim 12, characterized in that: The covering layer comprises an elastic filling layer and a skin layer covering the filling layer.

14. The interior trim panel according to claim 13, characterized in that: The filling layer at least partially fills the first weakened groove.

Images