Air bag cover plate and automobile instrument panel

Abstract

The utility model discloses an air bag cover plate and an automobile dashboard, and belongs to the technical field of automobile interiors, a weakening area is provided with a middle weakening groove and a peripheral weakening groove, the depth of a first transverse groove and the depth of two second transverse grooves of the middle weakening groove are all larger than that of a third transverse groove of the peripheral weakening groove, and the thickness of the third transverse groove is larger than that of the peripheral weakening groove. The depths of the longitudinal groove and the corner groove of the peripheral weakening groove are greater than those of the third transverse groove, so that when the air bag expands and pushes the air bag cover plate, the first transverse groove, the second transverse groove, the longitudinal groove and the corner groove of the air bag cover plate are disconnected, and the air bag cover plate is split into two cover plates along the peripheral weakening groove and the middle weakening groove; due to the fact that the depth of the third transverse groove is small, the two cover pieces can still be connected to the air bag cover plate, even if the two cover pieces are separated from the air bag cover plate, the two cover pieces can only fly out towards the two sides, and the two cover pieces cannot be pushed by the impact force of the air bag to fly towards a driver and passengers. Therefore, the damaged air bag cover plate is prevented from being pushed by the impact force of the air bag to impact a driver and passengers.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile interior decoration, in particular to an airbag cover and an automobile instrument panel. Background Art

[0002] Airbag covers can be installed in areas of a car's interior facing the driver and passenger, allowing the airbag to deploy from this location and provide safety protection. For example, an airbag cover can be installed on the dashboard in front of the passenger seat. To ensure smooth deployment, a weakened groove is typically cut into the cover, allowing the airbag to break along the weakened groove during deployment. However, a damaged airbag cover can be easily pushed by the impact of the airbag, striking the driver and passenger. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems in the prior art. To this end, the present invention provides an airbag cover and a car dashboard to prevent the damaged airbag cover from being pushed by the impact force of the airbag and hitting the driver and passengers.

[0004] According to an embodiment of the first aspect of the present invention, the airbag cover comprises a weakened area, wherein an upper side surface of the weakened area is provided with a middle weakened groove and a peripheral weakened groove, wherein the middle weakened groove is transversely arranged in the weakened area, and the peripheral weakened groove surrounds the outer circumference of the weakened area;

[0005] The intermediate weakened groove comprises:

[0006] a first transverse groove;

[0007] two second transverse grooves, the two second transverse grooves being respectively arranged at two ends of the first transverse groove;

[0008] The peripheral weakened groove comprises:

[0009] A longitudinal groove arranged along the longitudinal direction;

[0010] a third transverse groove arranged in the transverse direction;

[0011] A corner groove, two ends of which are respectively arranged at the end of the longitudinal groove and the end of the third transverse groove;

[0012] The depths of the first transverse groove, the second transverse groove, the longitudinal groove, and the corner groove are all greater than the depth of the third transverse groove.

[0013] The airbag cover according to the embodiment of the present invention has at least the following beneficial effects: a middle weakening groove and a peripheral weakening groove are provided in the weakened area, the depth of the first transverse groove and the two second transverse grooves of the middle weakening groove are both greater than the third transverse groove of the peripheral weakening groove, and the depth of the longitudinal groove and the corner groove of the peripheral weakening groove are both greater than the third transverse groove, so when the airbag inflates and pushes the airbag cover, the first transverse groove, the second transverse groove, the longitudinal groove and the corner groove of the airbag cover are disconnected, so that the airbag cover is split into two cover pieces along the peripheral weakening groove and the middle weakening groove, and the two cover pieces are opened outward along the middle weakening groove. Since the depth of the third transverse groove is relatively small, the two cover pieces may still be connected to the airbag cover, and even if the two cover pieces are detached from the airbag cover, the two cover pieces will only fly out to both sides and will not be pushed by the impact force of the airbag to fly towards the driver and passengers; therefore, the damaged airbag cover is prevented from being pushed by the impact force of the airbag and hitting the driver and passengers.

[0014] According to some embodiments of the present invention, the weakened zone includes a skeleton layer, an intermediate layer and a skin layer arranged in sequence from top to bottom, the third transverse groove penetrates into the skeleton layer, and the first transverse groove, the second transverse groove, the longitudinal groove and the corner groove penetrate into the skin layer.

[0015] According to some embodiments of the present invention, the depth of the third transverse groove is less than the thickness of the skeleton layer, and the depths of the first transverse groove, the second transverse groove, the longitudinal groove and the corner groove are all greater than the sum of the thicknesses of the skeleton layer and the intermediate layer.

[0016] According to some embodiments of the present invention, the first transverse groove and the longitudinal groove are respectively provided with a plurality of first blind hole groups distributed at equal intervals, and each of the first blind hole groups includes:

[0017] a plurality of first blind holes, the depth of which is greater than the sum of the thicknesses of the skeleton layer and the intermediate layer; two of the first blind holes form a group of hole units, and the groups of hole units are distributed at intervals;

[0018] A plurality of second blind holes have a depth less than the thickness of the skeleton layer, and one second blind hole is provided between every two adjacent groups of hole units.

[0019] According to some embodiments of the present invention, the distance from the bottom end of the first blind hole to the bottom surface of the epidermis layer ranges from 0.14 mm to 0.16 mm, and the distance from the bottom end of the second blind hole to the bottom surface of the skeleton layer ranges from 0.95 mm to 1.45 mm.

[0020] According to some embodiments of the present invention, each of the second transverse grooves and the corner grooves is respectively provided with a plurality of second blind hole groups distributed at equal intervals, and each of the second blind hole groups includes:

[0021] a plurality of third blind holes, the depth of which is greater than the sum of the thickness of the skeleton layer and the intermediate layer, and the plurality of third blind holes are distributed at intervals;

[0022] A plurality of fourth blind holes have a depth less than the thickness of the skeleton layer, and one fourth blind hole is arranged between every two adjacent third blind holes.

[0023] According to some embodiments of the present invention, the distance from the bottom end of the third blind hole to the bottom surface of the epidermis layer ranges from 0.14 mm to 0.16 mm, and the distance from the bottom end of the fourth blind hole to the bottom surface of the skeleton layer ranges from 0.95 mm to 1.45 mm.

[0024] According to some embodiments of the present invention, the third transverse groove is provided with a plurality of third blind hole groups distributed at equal intervals, and each of the third blind hole groups includes:

[0025] The depth of the plurality of fifth blind holes is less than the thickness of the skeleton layer, and the plurality of fifth blind holes are distributed at equal intervals.

[0026] According to some embodiments of the present invention, the distance from the bottom end of the fifth blind hole to the bottom surface of the skeleton layer ranges from 0.95 mm to 1.45 mm.

[0027] The automobile instrument panel according to the embodiment of the first aspect of the utility model includes the airbag cover as described in the above embodiment.

[0028] The automobile instrument panel according to the embodiment of the utility model has at least the following beneficial effects: the weakened area of ​​the airbag cover is provided with a middle weakening groove and a peripheral weakening groove, the depth of the first transverse groove and the two second transverse grooves of the middle weakening groove are both greater than the third transverse groove of the peripheral weakening groove, and the depth of the longitudinal groove and the corner groove of the peripheral weakening groove are both greater than the third transverse groove, so when the airbag inflates and pushes the airbag cover, the first transverse groove, the second transverse groove, the longitudinal groove and the corner groove of the airbag cover are disconnected, so that the airbag cover is split into two cover pieces along the peripheral weakening groove and the middle weakening groove, and the two cover pieces are opened outward along the middle weakening groove. Since the depth of the third transverse groove is small, the two cover pieces may still be connected to the airbag cover, and even if the two cover pieces are detached from the airbag cover, the two cover pieces will only fly out to both sides and will not be pushed by the impact force of the airbag to fly toward the driver and passengers; therefore, the damaged airbag cover is prevented from being pushed by the impact force of the airbag to hit the passenger in the front passenger seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic top view of an airbag cover according to an embodiment of the present invention;

[0030] Figure 2 It is a top view schematic diagram of the peripheral weakening groove and the middle weakening groove in one embodiment of the utility model;

[0031] Figure 3 It is a cross-sectional schematic diagram of the first transverse groove and the longitudinal groove in one embodiment of the present utility model;

[0032] Figure 4 It is a cross-sectional schematic diagram of the second transverse groove and the corner groove in one embodiment of the present utility model;

[0033] Figure 5 is a schematic cross-sectional view of the third transverse groove in one embodiment of the present utility model;

[0034] Figure 6 The utility model is a schematic top view of a car instrument panel according to an embodiment of the present invention.

[0035] Figure 1: Weakened area 100, skeleton layer 110, middle layer 120, skin layer 130, first blind hole group 140, first blind hole 141, second blind hole 142, second blind hole group 150, third blind hole 151, fourth blind hole 152, third blind hole group 160, fifth blind hole 161, middle weakened groove 200, first transverse groove 210, second transverse groove 220, peripheral weakened groove 300, longitudinal groove 310, third transverse groove 320, corner groove 330. DETAILED DESCRIPTION

[0036] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0037] In the description of the present invention, it should be understood that the terms front, rear, up, down, axial, circumferential, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0038] In the description of this utility model, "above," "below," and "within" are understood to be exclusive of the number indicated, while "above," "below," and "within" are understood to be inclusive of the number indicated. The use of "first" and "second" is solely for the purpose of distinguishing technical features and is not to be construed as indicating or implying relative importance, or implicitly specifying the number or order of the technical features indicated.

[0039] In the description of the present invention, it should be noted that terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0040] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described below are only some embodiments of the present invention, not all embodiments.

[0041] Reference Figures 1 to 5 As shown, the airbag cover of the embodiment of the utility model is made into the following embodiment.

[0042] Reference Figure 1 and Figure 2 As shown, the airbag cover includes a weakened area 100 , a middle weakened groove 200 and a peripheral weakened groove 300 .

[0043] The upper side of the weakened zone 100 is provided with a middle weakened groove 200 and a peripheral weakened groove 300. The peripheral weakened groove 300 surrounds the periphery of the weakened zone 100. The middle weakened groove 200 is arranged in the horizontal direction and is arranged in the middle of the weakened zone 100.

[0044] In this embodiment, the outer peripheral weakened groove 300 is rectangular, and the two ends of the middle weakened groove 200 are respectively connected to two opposite sides of the outer peripheral weakened groove 300 .

[0045] The middle weakened groove 200 is provided with a first transverse groove 210 and two second transverse grooves 220 . The two second transverse grooves 220 respectively connect two ends of the first transverse groove 210 .

[0046] The peripheral weakening groove 300 is provided with two longitudinal grooves 310, two third transverse grooves 320 and four corner grooves 330. The longitudinal grooves 310, the corner grooves 330 and the third transverse grooves 320 are connected end to end in sequence to form a rectangular ring structure. In this embodiment, the two second transverse grooves 220 of the middle weakening groove 200 are respectively connected to the two longitudinal grooves 310.

[0047] The depths of the first transverse groove 210 and the second transverse groove 220 are greater than the depth of the third transverse groove 320 . The depths of the longitudinal groove 310 and the corner groove 330 are greater than the depth of the third transverse groove 320 .

[0048] The weakened zone 100 is provided with an intermediate weakened groove 200 and a peripheral weakened groove 300. The depths of the first transverse groove 210 and the two second transverse grooves 220 of the intermediate weakened groove 200 are both greater than the third transverse groove 320 of the peripheral weakened groove 300, and the depths of the longitudinal groove 310 and the corner groove 330 of the peripheral weakened groove 300 are both greater than the third transverse groove 320.

[0049] Therefore, when the airbag expands and pushes the airbag cover, the first transverse groove 210, the second transverse groove 220, the longitudinal groove 310 and the corner groove 330 of the airbag cover are disconnected, so that the airbag cover is split into two cover pieces along the peripheral weakening groove 300 and the middle weakening groove 200, and the two cover pieces are opened outward along the middle weakening groove 200.

[0050] Since the depth of the third transverse groove 320 is relatively small, the two cover plates may still be connected to the airbag cover plate. Even if the two cover plates are detached from the airbag cover plate, the two cover plates will only fly out to both sides and will not be pushed by the impact force of the airbag to fly towards the driver and passengers; therefore, the damaged airbag cover plate is prevented from being pushed by the impact force of the airbag and hitting the driver and passengers.

[0051] In some embodiments, reference Figures 3 to 5 As shown, the weakened zone 100 is provided with a skeleton layer 110, an intermediate layer 120, and an epidermal layer 130. The skeleton layer 110, the intermediate layer 120, and the epidermal layer 130 are arranged in sequence from top to bottom. The first transverse groove 210 and the second transverse groove 220 extend into the epidermal layer 130, the third transverse groove 320 extends into the skeleton layer 110, and the longitudinal groove 310 and the corner groove 330 extend into the epidermal layer 130.

[0052] The material strength of the skeleton layer 110 is relatively high, and the third transverse groove 320 does not completely cut through the skeleton layer 110. When the airbag inflates and stretches the airbag cover, the third transverse groove 320 keeps the cover pieces on both sides of the middle weakened groove 200 connected to the airbag cover, thereby preventing the two cover pieces from flying out and injuring the driver and passengers; and the first transverse groove 210 and the second transverse groove 220 of the middle weakened groove 200 both extend into the epidermis layer 130, which helps the middle weakened groove 200 to quickly break when the airbag inflates, and the longitudinal groove 310 and the corner groove 330 of the peripheral weakened groove 300 also extend into the epidermis layer 130, which helps to form two cover pieces opened to both sides after the middle weakened groove 200 is broken, thereby preventing the cover pieces from blocking the opening of the airbag.

[0053] In some embodiments, reference Figure 2 As shown, the first transverse groove 210 is located between the two second transverse grooves 220 , and the longitudinal groove 310 is located between the two corner grooves 330 .

[0054] Reference Figure 3 As shown, in the cross-sectional view of the two longitudinal grooves 310 and the first transverse groove 210 , each longitudinal groove 310 and the first transverse groove 210 is respectively provided with a plurality of first blind hole groups 140 .

[0055] The plurality of first blind hole groups 140 are distributed at equal intervals along the extending direction of the longitudinal groove 310 or the first transverse groove 210 . Each first blind hole group 140 includes a plurality of first blind holes 141 and a plurality of second blind holes 142 .

[0056] The depth of each first blind hole 141 is greater than the sum of the thicknesses of the intermediate layer 120 and the skeleton layer 110, and the depth of each second blind hole 142 is less than the thickness of the skeleton layer 110. Two first blind holes 141 are arranged side by side as a group of hole units, and multiple groups of hole units are distributed at intervals, and a second blind hole 142 is arranged between every two adjacent groups of hole units.

[0057] A plurality of first blind hole groups 140 are cut into the two longitudinal grooves 310 and the first transverse groove 210 by laser cutting equipment. The arrangement of the plurality of first blind holes 141 and the plurality of second blind holes 142 reduces the residual amount of the skeleton layer 110 and the intermediate layer 120 in the longitudinal grooves 310 and the first transverse grooves 210, which helps the first transverse grooves 210 and the two longitudinal grooves 310 to split faster than other grooves when the airbag is inflated.

[0058] In some embodiments, the distance between the bottom surface of the skin layer 130 and the bottom end of the first blind hole 141 is between 0.14 mm and 0.16 mm, and the distance between the bottom surface of the skeleton layer 110 and the bottom end of the second blind hole 142 is between 0.95 mm and 1.45 mm.

[0059] The depths of the first blind holes 141 and the second blind holes 142 are defined to facilitate guiding a laser cutting device to cut out the first blind hole group 140 .

[0060] In some embodiments, reference Figure 2 As shown, the two second transverse grooves 220 and the four corner grooves 330 are respectively provided with a plurality of second blind hole groups 150 , and the plurality of second blind hole groups 150 are arranged at equal intervals along the extension direction of the second transverse grooves 220 or the corner grooves 330 .

[0061] Reference Figure 4 As shown, each second blind hole group 150 is provided with a plurality of third blind holes 151 and a plurality of fourth blind holes 152. The depth of each third blind hole 151 is greater than the sum of the thicknesses of the skeleton layer 110 and the intermediate layer 120, and the depth of each fourth blind hole 152 is less than the thickness of the skeleton layer 110. The plurality of third blind holes 151 are distributed at intervals, and a fourth blind hole 152 is provided between every two adjacent third blind holes 151.

[0062] A plurality of second blind hole groups 150 are cut into the two second transverse grooves 220 and the four corner grooves 330 by laser cutting equipment. The arrangement of the plurality of third blind holes 151 and the plurality of fourth blind holes 152 makes the residual amount of the skeleton layer 110 and the intermediate layer 120 in the second transverse grooves 220 and the corner grooves 330 moderate, which helps the two second transverse grooves 220 and the four corner grooves 330 to break smoothly when the airbag is inflated.

[0063] In some embodiments, the distance between the bottom surface of the skin layer 130 and the bottom end of the third blind hole 151 is between 0.14 mm and 0.16 mm, and the distance between the bottom surface of the skeleton layer 110 and the bottom end of the fourth blind hole 152 is between 0.95 mm and 1.45 mm.

[0064] The depths of the third blind hole 151 and the fourth blind hole 152 are defined to facilitate guiding the laser cutting equipment to cut out the second blind hole group 150 .

[0065] In some embodiments, reference Figure 2 and Figure 5 As shown, each third transverse groove 320 is provided with a plurality of third blind hole groups 160, and the plurality of third blind hole groups 160 are arranged at equal intervals along the extension direction of the third transverse groove 320. Each third blind hole group 160 is provided with a plurality of fifth blind holes 161, and the depth of each fifth blind hole 161 is less than the thickness of the skeleton layer 110, and the plurality of fifth blind holes 161 are distributed at equal intervals.

[0066] A plurality of third blind hole groups 160 are cut in the two third transverse grooves 320 by laser cutting equipment. The arrangement of the plurality of fifth blind holes 161 results in a larger residual amount of the skeleton layer in the third transverse grooves 320, which helps the two third transverse grooves 320 to remain connected to the airbag cover after the airbag is inflated.

[0067] In some embodiments, the distance between the bottom surface of the skeleton layer 110 and the bottom end of the fifth blind hole 161 is between 0.95 mm and 1.45 mm.

[0068] The depth of the fifth blind hole 161 is defined to facilitate guiding the laser cutting equipment to cut out the third blind hole group 160 .

[0069] Specifically, refer to Figures 1 to 5 As shown, the airbag cover includes a weakened area 100 , a middle weakened groove 200 and a peripheral weakened groove 300 . The peripheral weakened groove 300 is rectangular and annularly surrounds the weakened area 100 , and the middle weakened groove 200 is transversely arranged in the weakened area 100 .

[0070] Reference Figure 2 As shown, the middle weakened groove 200 is provided with a first transverse groove 210 and two second transverse grooves 220 , and the two second transverse grooves 220 are respectively provided at two ends of the first transverse groove 210 .

[0071] The peripheral weakening groove 300 includes two longitudinal grooves 310, two third transverse grooves 320 and four corner grooves 330. The longitudinal grooves 310, the corner grooves 330 and the third transverse grooves 320 are connected end to end to form a ring. The third transverse groove 320 is parallel to the first transverse groove 210 and the second transverse groove 220. The longitudinal groove 310 is perpendicular to the third transverse groove 320. The corner groove 330 is arc-shaped, and the two ends of the corner groove 330 are respectively connected to the third transverse groove 320 and the longitudinal groove 310.

[0072] Reference Figures 3 to 5 As shown, the weakened area 100 is provided with a skeleton layer 110, an intermediate layer 120 and a skin layer 130 in sequence from top to bottom.

[0073] Reference Figure 3 As shown, the first transverse groove 210 is provided with a plurality of first blind hole groups 140, and the plurality of first blind hole groups 140 are distributed at equal intervals along the extension direction of the first transverse groove 210. Each first blind hole group 140 includes a plurality of first blind holes 141 and a plurality of second blind holes 142. The first blind holes 141 penetrate into the epidermis layer 130, and the distance between the bottom surface of the epidermis layer 130 and the bottom end of the first blind holes 141 is 0.15 mm. The second blind holes 142 penetrate into the skeleton layer 110, and the distance between the bottom surface of the skeleton layer 110 and the bottom end of the second blind holes 142 is 1.2 mm. Two first blind holes 141 are arranged side by side as a group of hole units, and the plurality of groups of hole units are distributed at intervals. A second blind hole 142 is arranged between every two adjacent groups of hole units.

[0074] Reference Figure 4 As shown, each second transverse groove 220 is provided with a plurality of second blind hole groups 150, and the plurality of second blind hole groups 150 are distributed at equal intervals along the extension direction of the second transverse groove 220. Each second blind hole group 150 includes a plurality of third blind holes 151 and a plurality of fourth blind holes 152. The third blind holes 151 penetrate into the epidermis 130, and the distance between the bottom surface of the epidermis 130 and the bottom end of the third blind holes 151 is 0.15 mm. The fourth blind holes 152 penetrate into the skeleton layer 110, and the distance between the bottom surface of the skeleton layer 110 and the bottom end of the fourth blind holes 152 is 1.2 mm. The plurality of third blind holes 151 are distributed at intervals, and a fourth blind hole 152 is provided between every two adjacent third blind holes 151.

[0075] Reference Figure 3As shown, each longitudinal groove 310 is provided with a plurality of first blind hole groups 140, and the plurality of first blind hole groups 140 are distributed at equal intervals along the extension direction of the longitudinal groove 310. Each first blind hole group 140 includes a plurality of first blind holes 141 and a plurality of second blind holes 142. The first blind holes 141 penetrate into the epidermis 130, and the distance between the bottom surface of the epidermis 130 and the bottom end of the first blind holes 141 is 0.15 mm. The second blind holes 142 penetrate into the skeleton layer 110, and the distance between the bottom surface of the skeleton layer 110 and the bottom end of the second blind holes 142 is 1.2 mm. Two first blind holes 141 are arranged side by side as a group of hole units, and the plurality of groups of hole units are distributed at intervals. A second blind hole 142 is arranged between every two adjacent groups of hole units.

[0076] Reference Figure 5 As shown, each third transverse groove 320 is provided with a plurality of third blind hole groups 160, and the plurality of third blind hole groups 160 are evenly spaced along the extension direction of the third transverse groove 320. Each third blind hole group 160 includes a plurality of fifth blind holes 161, and the fifth blind holes 161 penetrate into the skeleton layer 110. The distance between the bottom surface of the skeleton layer 110 and the bottom end of the fifth blind hole 161 is 1.2 mm.

[0077] Reference Figure 4 As shown, each corner groove 330 is provided with a plurality of second blind hole groups 150, and the plurality of second blind hole groups 150 are distributed at equal intervals along the extension direction of the corner groove 330. Each second blind hole group 150 includes a plurality of third blind holes 151 and a plurality of fourth blind holes 152. The third blind holes 151 penetrate into the epidermis layer 130, and the distance between the bottom surface of the epidermis layer 130 and the bottom end of the third blind holes 151 is 0.15 mm. The fourth blind holes 152 penetrate into the skeleton layer 110, and the distance between the bottom surface of the skeleton layer 110 and the bottom end of the fourth blind holes 152 is 1.2 mm. The plurality of third blind holes 151 are distributed at intervals, and a fourth blind hole 152 is provided between every two adjacent third blind holes 151.

[0078] In addition, an embodiment of the present utility model further provides a car dashboard, comprising the airbag cover of the above embodiment.

[0079] The automobile dashboard adopts the above-mentioned airbag cover, and the weakened area 100 is provided with a middle weakening groove 200 and a peripheral weakening groove 300. The depth of the first transverse groove 210 and the two second transverse grooves 220 of the middle weakening groove 200 is greater than the third transverse groove 320 of the peripheral weakening groove 300, and the depth of the longitudinal groove 310 and the corner groove 330 of the peripheral weakening groove 300 is greater than the third transverse groove 320.

[0080] Therefore, when the airbag expands and pushes the airbag cover, the first transverse groove 210, the second transverse groove 220, the longitudinal groove 310 and the corner groove 330 of the airbag cover are disconnected, so that the airbag cover is split into two cover pieces along the peripheral weakening groove 300 and the middle weakening groove 200, and the two cover pieces are opened outward along the middle weakening groove 200.

[0081] Since the depth of the third transverse groove 320 is relatively small, the two cover plates may still be connected to the airbag cover plate. Even if the two cover plates are detached from the airbag cover plate, they will only fly out to both sides and will not be pushed by the impact force of the airbag to fly towards the driver and passengers; therefore, the damaged airbag cover plate is prevented from being pushed by the impact force of the airbag and hitting the passenger in the front passenger seat.

[0082] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. An airbag cover, characterized in that: The invention comprises a weakened area, wherein the upper side of the weakened area is provided with a middle weakened groove and a peripheral weakened groove, wherein the middle weakened groove is transversely arranged in the weakened area, and the peripheral weakened groove surrounds the outer circumference of the weakened area; The intermediate weakened groove comprises: a first transverse groove; two second transverse grooves, the two second transverse grooves being respectively arranged at two ends of the first transverse groove; The peripheral weakened groove comprises: A longitudinal groove arranged along the longitudinal direction; a third transverse groove arranged in the transverse direction; A corner groove, two ends of which are respectively arranged at the end of the longitudinal groove and the end of the third transverse groove; The depths of the first transverse groove, the second transverse groove, the longitudinal groove, and the corner groove are all greater than the depth of the third transverse groove.

2. The airbag cover according to claim 1, characterized in that: The weakened zone includes a skeleton layer, an intermediate layer and a skin layer arranged in sequence from top to bottom, the third transverse groove penetrates into the skeleton layer, and the first transverse groove, the second transverse groove, the longitudinal groove and the corner groove penetrate into the skin layer.

3. The airbag cover according to claim 2, characterized in that: The depth of the third transverse groove is less than the thickness of the skeleton layer, and the depths of the first transverse groove, the second transverse groove, the longitudinal groove and the corner groove are all greater than the sum of the thicknesses of the skeleton layer and the intermediate layer.

4. The airbag cover according to claim 3, characterized in that: The first transverse groove and the longitudinal groove are respectively provided with a plurality of first blind hole groups distributed at equal intervals, and each first blind hole group includes: a plurality of first blind holes, the depth of which is greater than the sum of the thicknesses of the skeleton layer and the intermediate layer; two of the first blind holes form a group of hole units, and the groups of hole units are distributed at intervals; A plurality of second blind holes have a depth less than the thickness of the skeleton layer, and one second blind hole is provided between every two adjacent groups of hole units.

5. The airbag cover according to claim 4, characterized in that: The distance from the bottom end of the first blind hole to the bottom surface of the epidermis layer ranges from 0.14 mm to 0.16 mm, and the distance from the bottom end of the second blind hole to the bottom surface of the skeleton layer ranges from 0.95 mm to 1.45 mm.

6. The airbag cover according to claim 3, characterized in that: Each of the second transverse grooves and the corner grooves is respectively provided with a plurality of second blind hole groups distributed at equal intervals, and each of the second blind hole groups includes: a plurality of third blind holes, the depth of which is greater than the sum of the thickness of the skeleton layer and the intermediate layer, and the plurality of third blind holes are distributed at intervals; A plurality of fourth blind holes have a depth less than the thickness of the skeleton layer, and one fourth blind hole is arranged between every two adjacent third blind holes.

7. The airbag cover according to claim 6, characterized in that: The distance from the bottom end of the third blind hole to the bottom surface of the epidermis layer ranges from 0.14 mm to 0.16 mm, and the distance from the bottom end of the fourth blind hole to the bottom surface of the skeleton layer ranges from 0.95 mm to 1.45 mm.

8. The airbag cover according to claim 3, characterized in that: The third transverse groove is provided with a plurality of third blind hole groups distributed at equal intervals, and each of the third blind hole groups comprises: The depth of the plurality of fifth blind holes is less than the thickness of the skeleton layer, and the plurality of fifth blind holes are distributed at equal intervals.

9. The airbag cover according to claim 8, characterized in that: The distance from the bottom end of the fifth blind hole to the bottom surface of the skeleton layer ranges from 0.95 mm to 1.45 mm.

10. A car dashboard, characterized in that: The invention comprises the airbag cover according to any one of claims 1 to 9.

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