Cover body of airbag device

Abstract

To provide a cover body of an airbag device that can provide appropriate expansion behavior of an airbag.SOLUTION: A front plate part 20 has: a first hinge part 35 formed in an area 22 along a lateral direction at a rear side of a second surface part 26 formed adjacent to an upper part of a first surface part 25 on which a decorative body 16 is positioned, through a bent part 33 along the lateral direction; a second hinge part 36 formed, in a nearly parallel to the first hinge part 35, in the area 22, at a rear side of the bent part 33; and a part 40 to be fractured that sections an upper door part 42 to be formed that expands upward with the first hinge part 35 as a center, in the area 22. The part 40 to be fractured comprises: a first portion 45 positioned lower than an expansion center of the airbag 11 and the decorative body 16; and a second portion formed at a position along left and right wall parts 21 in the area 22 to extend at least from the rear side of the first surface part 25 beyond the second hinge part 36 to the rear side of the second surface part 26.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a cover body for an airbag device that is disposed to cover an airbag in a folded state. [Background technology]

[0002] In a conventional airbag device that protects occupants from impact when a vehicle such as an automobile crashes, a decorative body is placed on a cover body that covers the folded airbag. Depending on the design of the cover body, the decorative body is placed in the center, and the tear line that tears the cover body when the airbag inflates is set at a position offset from the center of deployment of the airbag so as to avoid the decorative body (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2019-137197 Summary of the Invention [Problem to be solved by the invention]

[0004] Even if the cover body has a shape in which the door portion that unfolds due to the tear line has a curved surface between the hinge portion that is the pivot axis and the decorative body, it is required to ensure good deployment behavior of the airbag. Also, although it is possible to improve deployment of the airbag by setting a tear line that extends beyond the hinge portion, it is also required to transmit the initial stress to the hinge portion to ensure good deployment behavior of the airbag.

[0005] SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and has as its object to provide a cover body for an airbag device that can ensure good deployment behavior of the airbag. [Means for solving the problem]

[0006] A cover body for an airbag device according to an aspect of the present invention is a cover body for an airbag device that is arranged to cover an airbag in a folded state, and comprises a surface plate portion, a wall portion that protrudes from the back side of the surface plate portion and is positioned to surround an area of ​​the surface plate portion that faces the airbag, and a decorative body that is positioned in the area and arranged on the surface plate portion, wherein the surface plate portion comprises a first surface portion on which the decorative body is located and that forms a part of the area, a second surface portion that is adjacent to an upper part of the first surface portion via a bent portion along the left-right direction and that forms another part of the area, and a first hinge portion formed in the area along the left-right direction on the back side of the second surface portion, The panel has a second hinge portion formed in the area on the back side of the bent portion and approximately parallel to the first hinge portion, and a planned rupture portion formed in the area so as to be rupturable by the inflation pressure of the airbag, and dividing the area into planned door portions that expand upwardly around the first hinge portion, and the planned rupture portion is formed along the left-right direction on the back side of the first surface portion and comprises a first portion that is located below the center of expansion of the airbag and the decorative body, and a second portion that is formed in a position along the left and right wall portions of the area, extending from at least the back side of the first surface portion across the second hinge portion to the back side of the second surface portion. [Effects of the Invention]

[0007] According to the present invention, it is possible to obtain a good deployment behavior of the airbag. [Brief explanation of the drawings]

[0008] [Figure 1] 4 is an end view corresponding to a position II in FIG. 3, showing the cover body of the airbag device according to the embodiment of the present invention. [Figure 2] FIG. 2 is an enlarged end view of a portion of FIG. [Figure 3] FIG. [Figure 4] 2 is a cross-sectional view of the cover body taken along a line II-II in FIG. 3. FIG. [Figure 5] FIG. 2 is a perspective view showing the cover body from the back side. [Figure 6]FIG. 2 is a front view showing an example of a handle provided with the same cover body. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0010] In FIG. 6, reference numeral 1 denotes a steering handle (steering wheel) for steering a vehicle such as an automobile. The steering wheel 1 is configured by attaching an airbag device 3 and a lower cover to a steering wheel main body 2. In this embodiment, the steering wheel 1 is exemplified as a steering wheel in which the steering wheel main body 2 has a boss 5 located in the center, a rim (grip) 6 that is a circular or arc-shaped grip surrounding the boss 5, and the spokes 7 that are radially connected. However, the steering wheel 1 is not limited to this, and may also be a control stick type, such as a so-called yoke type. The steering wheel 1 is normally attached to a steering shaft, which is a steering shaft provided in a vehicle in an inclined state. In the following description, the direction of arrow U is the upper side and the direction of arrow D is the lower side when viewing the steering wheel 1 from the occupant's side. In addition, the front, rear, left and right directions are based on the direction seen by a passenger sitting in the driver's seat, and in each drawing, the arrow FR direction is the front or rear side, the arrow RR direction is the rear or front side, the arrow L direction is the left side, and the arrow R direction is the right side. Also, the positions and shapes of each part of the steering wheel 1 will be described based on the steering reference state shown in Figure 6, i.e., the neutral position.

[0011] The handle body 2 is formed by covering a part of a core (armature) with a covering made of synthetic resin or the like. The core is made of metal such as aluminum or magnesium. The covering is made of, for example, synthetic resin.

[0012] The boss portion 5 is attached to the steering shaft and is located at the rotation center of the steering wheel 1. The airbag device 3 is attached to the front of the boss portion 5, that is, to the rear.

[0013] The rim portion 6 is the portion that the occupant (driver) grips to operate the steering wheel 1. In other words, the rim portion 6 is the portion used for steering. On the surface of the rim portion 6, the covering portion may be covered with a skin body.

[0014] There are multiple spokes 7. In the present embodiment, three spokes 7 are provided to connect the left and right sides and the bottom of the boss 5 to the rim 6, but the number is not limited to this and may be, for example, two or four or more.

[0015] The airbag device 3 is disposed so as to cover the front side of the boss portion 5 of the handle body 2. As shown in Fig. 1, the airbag device 3 is configured by attaching a folded airbag 11 and an inflator 12 that injects gas to inflate the airbag 11 to a case body 10 as an attachment member, and by attaching a cover body 13 that covers the front side of the airbag 11.

[0016] The case body 10 is also called a base plate or the like. The case body 10 is attached to the front portion of the core metal of the boss portion 5 (shown in FIG. 6) of the handle body 2. The case body 10 is formed from, for example, a synthetic resin into a box shape with an open front side. The airbag 11 and the inflator 12 are attached to the bottom of the case body 10 via a retainer, which is an attachment member.

[0017] The airbag 11 is formed in a circular shape or the like to protect the occupant when deployed, and is folded into any predetermined shape.

[0018] The inflator 12 is fixed to the bottom of the case body 10 with a portion of it inserted into the gas inlet of the airbag 11. The inflator 12 is electrically connected to a control device such as an on-board control unit (ECU), and is configured to inject gas into the airbag 11 in response to a signal output from the control means when necessary, such as during a collision.

[0019] 1 to 4 is also called a pad or a module cover. The cover body 13 includes a cover body 15, which is a member body, for example, and the surface of the cover body 15 is covered with a skin member 13, and a decorative body 16 is attached to the cover body 15.

[0020] The cover main body 15 is made of, for example, synthetic resin. The cover main body 15 includes a front panel 20 as a covering that covers part of the boss 5 and the spoke 7 (shown in FIG. 6 ), and a wall 21 that protrudes from the rear side of the front panel 20. The space surrounded by the front panel 20 and the wall 21 serves as a storage space that stores the folded airbag 11. The wall 21 is located at a position where it surrounds an area 22 that faces the folded airbag 11, and in this embodiment, is formed in a continuous cylindrical shape that surrounds the area 22. The wall 21 is formed with a cover body engaging portion 23, which is a hole for engaging the case body 10 and the cover body 13, and the like.

[0021] The front panel 20 has a first surface 25 on which the decorative body 16 is located, and a second surface 26 connected to the upper side of the first surface 25. In this embodiment, the front panel 20 further has a third surface 27 connected to the lower side of the first surface 25. In other words, the second surface 26 and the third surface 27 of the front panel 20 are connected to each other on opposite sides in the up-down direction with respect to the first surface 25. The surface of the front panel 20 may be covered with a skin member or the like.

[0022] The first surface portion 25 is a portion extending in the vertical center of the top panel portion 20. The first surface portion 25 is formed across the entire left-right direction of the top panel portion 20, and forms part of the area 22, and in this embodiment, forms the vertical center portion of the area 22. The first surface portion 25 is formed over a range wider in the vertical direction than the second surface portion 26.

[0023] An attachment recess 30, to which the decorative body 16 is attached, is formed on the front side, or front side, of the first surface portion 25. The attachment recess 30 is located in the center of the first surface portion 25 in the vertical and horizontal directions, and is arranged in a position closer to the upper side in the center of the left and right direction in the area 22. The attachment recess 30 is located in the center of the area 22 of the front panel portion 20, i.e., in a range that includes the deployment center of the airbag 11. A hole 31 for fixing the decorative body 16 is opened at the bottom of the attachment recess 30. The attachment recess 30 is formed in a shape that matches the outer shape of the decorative body 16. In this embodiment, the attachment recess 30 is formed in, for example, a circular shape.

[0024] The second surface portion 26 is a portion that forms the upper portion of the front panel portion 20. The second surface portion 26 is formed across the entire left-right direction of the front panel portion 20 and forms another portion of the area 22, i.e., the upper portion of the area 22 in this embodiment. The second surface portion 26 is adjacent to the first surface portion 25 via a bent portion 33. The bent portion 33 is formed linearly along the left-right direction. At the bent portion 33, the angle of the tangent plane between the first surface portion 25 and the second surface portion 26 changes sharply, resulting in a non-gradual curve between the first surface portion 25 and the second surface portion 26. The bent portion 33 is a linear portion known as a character line, and is a continuous portion near the apex of a convex shape toward the front side. The bent portion 33 is also located above and spaced apart from the upper edge of the decorative body 16 (mounting recess 30).

[0025] A first hinge portion 35 is formed on the rear side, i.e., the back surface, of the second surface portion 26. The first hinge portion 35 is located in area 22. That is, the first hinge portion 35 is located inward relative to the surface of the wall portion 21. The first hinge portion 35 is formed along the inner edge of the base end of the wall portion 21 and extends in the left-right direction. The first hinge portion 35 is a groove portion formed thinly relative to the general portion of the second surface portion 26. The first hinge portion 35 is formed thick enough to withstand the inflation pressure of the airbag 11 without breaking. The first hinge portion 35 is located above and spaced apart from the bent portion 33. Therefore, in the vertical direction, the bent portion 33 is located between the first hinge portion 35 and the upper edge of the decorative body 16 (mounting recess 30).

[0026] A second hinge portion 36 is formed on the rear side of the bent portion 33. The second hinge portion 36 is also referred to as a break point tear. The second hinge portion 36 is located in the area 22. That is, the second hinge portion 36 is located inward relative to the surface of the wall portion 21. The second hinge portion 36 extends in the left-right direction and is parallel or approximately parallel to the first hinge portion 35. Here, "parallel" usually refers to a relationship between straight lines, but in the present embodiment, "parallel" refers to a relationship between curved lines that are at a constant or approximately constant distance from each other. In other words, the first hinge portion 35 and the second hinge portion 36 are not limited to being linear. Furthermore, both left and right ends of the second hinge portion 36 are close to the base end of the wall portion 21. The second hinge portion 36 is a groove portion formed thinly relative to the general portion of the second surface portion 26. The second hinge portion 36 is formed to have a thickness that can withstand the inflation pressure of the airbag 11 without breaking.

[0027] The third surface portion 27 is a portion that forms the lower part of the top panel portion 20. The third surface portion 27 is formed across the entire top panel portion 20 in the left-right direction, and forms another part of area 22, that is, the lower part of area 22 in this embodiment. The third surface portion 27 is adjacent to the first surface portion 25 via a curved portion 37. The curved portion 37 is formed linearly along the left-right direction. At the position of the curved portion 37, the angle of the tangent plane between the first surface portion 25 and the third surface portion 27 changes smoothly, so that the first surface portion 25 and the third surface portion 27 form a gently curved surface. The curved portion 37 is formed parallel or approximately parallel to the bent portion 33.

[0028] A third hinge portion 38 is formed on the back side of the third surface portion 27. The third hinge portion 38 is located in the area 22. That is, the third hinge portion 38 is located inward relative to the surface of the wall portion 21. The third hinge portion 38 extends along the shape of both sides of the lower part of the area 22. In this embodiment, the third hinge portion 38 is formed along an oblique direction that is inclined relative to the up-down and left-right directions.

[0029] 3 and 5, a breakable portion 40 is formed on the back side of the front panel portion 20 facing the storage portion. The breakable portion 40, also called a tear line, is a thin, groove-shaped portion formed to be breakable by the inflation pressure of the airbag 11. In FIG. 5, the breakable portion 40 is indicated by a thick solid line for clarity. The breakable portion 40 shown in FIGS. 3 and 5 is a weak portion formed to be thinner than the first hinge portion 35 and the second hinge portion 36. The breakable portion 40 defines a door portion in the area 22, and when the breakable portion 40 is broken, the door portion deploys as a door portion, opening a projection opening for the inflated airbag 11 (shown in FIG. 1) into the area 22.

[0030] The breakable portion 40 is arbitrarily set at a position that avoids the decorative body 16 (mounting recess 30) depending on the shape and number of door sections to be set. The breakable portion 40 is formed to divide into area 22 at least an upper door section 42, which is a door section that extends upward (toward 12 o'clock on an analog clock) around the first hinge section 35. Therefore, the breakable portion 40 has a first portion 45 and a second portion 46. Furthermore, in this embodiment, the breakable portion 40 is formed to divide into area 22 three door sections: the upper door section 42 and lower door sections 43, 43, which are located on both the left and right sides below the upper door section 42 and extend downward to both sides (toward 8 o'clock and 4 o'clock on an analog clock) around the third hinge section 38. Therefore, the breakable portion 40 of this embodiment further has a third portion 47 and a fourth portion 48.

[0031] The first portion 45 is a left-right tear line formed on the back side of the first surface portion 25 along the left-right direction. The first portion 45 is located below the deployment center of the airbag 11 (shown in FIG. 1), i.e., the approximate center of the area 22, and the decorative body 16 (mounting recess 30). Both ends of the first portion 45 are located on both sides of the area 22 and are close to the wall portion 21. The first portion 45 is also arranged along the lower edge of the decorative body 16 (mounting recess 30). In this embodiment, the first portion 45 integrally includes a detour portion 45a that curves in an arc along the lower edge of the decorative body 16 (mounting recess 30) to detour around the decorative body 16 (mounting recess 30), and extension portions 45b, 45b that are connected to both left and right ends of the detour portion 45a and extend in the left-right direction. Therefore, the upper portion to be a door 42 is formed in a range including the decorative body 16 and the bent portion 33 (second hinge portion 36), and has a larger area than the lower portion to be a door 43.

[0032] The second portion 46 is an upper and lower tear line formed in the vertical direction from at least the back side of the first surface portion 25 to the back side of the second surface portion 26, across the second hinge portion 36. The second portion 46 is connected to both left and right end portions of the first portion 45, i.e., the end portions of the extension portions 45b, 45b opposite the detour portion 45a, and is formed along the inner edges of the base ends of the left and right wall portions 21. The second hinge portion 36 is located across a position near the upper ends of the left and right second portions 46. The upper ends of the second portions 46 form bottom tear portions 46a, which are extensions that extend in the vertical direction along the inner edges of the base ends of the wall portions 21, i.e., along both side edges of the area 22, on the back side of the second surface portion 26. The bottom tear portions 46a are each located below the first hinge portion 35. 4, in the range A between the left and right bottom tear portions 46a, no reinforcing portion such as a rib is formed along the vertical direction on the back side of the second surface portion 26 and the back side of the bent portion 33. In this embodiment, the lower end of the second portion 46 is formed to extend beyond the curved portion 37 to the back side of the third surface portion 27. The lower end of the second portion 46 is bent back toward the inside of the area 22, i.e., in a direction away from the wall portion 21.

[0033] The third portion 47 is an upper and lower tear line formed in the vertical direction from the back side of the first surface portion 25, across the curved portion 37, and to the back side of the third surface portion 27. The third portion 47 is continuous with the first portion 45 and extends linearly downward from the first portion 45. The lower end of the third portion 47 extends to the lower end of the area 22 and is close to the wall portion 21. The third portion 47 is located below the center portion of the area 22 in the left-right direction. The third portion 47 is continuous with the detour portion 45a of the first portion 45.

[0034] The fourth portion 48 is a left-right tear line formed on the rear side of the third surface portion 27 along the left-right direction. The fourth portion 48 is located below the first portion 45. The fourth portion 48 is located along the base end of the lower wall portion 21. Both left and right ends of the fourth portion 48 are folded back and curved toward the inside of the area 22, i.e., in a direction away from the wall portion 21. Third hinge portions 38, 38 are set between both left and right ends of the fourth portion 48 and the lower ends of the left and right second portions 46.

[0035] 1 is also called an emblem or ornament. The decorative body 16 may be a one-piece structure or a multi-piece structure, but in this embodiment, a two-piece structure consisting of a design part 50 that forms the design side and a fixing part 51 that fixes the design part 50 to the front panel part 20 is used as an example.

[0036] The design portion 50 is a portion that is located on the front side of the area 22 of the front panel portion 20 and presents a design. The design portion 50 is formed in a shape that fits into the mounting recess 30, and in this embodiment has a circular outer shape. The design portion 50 is formed, for example, in a plate shape, and has a pin-shaped locking portion 52, which is a leg portion that is inserted into the hole portion 31, protruding from the back side.

[0037] The fixing portion 51 is located on the back side of the area 22 of the front panel portion 20, and is a member that, together with the design portion 50, sandwiches the bottom of the mounting recess 30 of the front panel portion 20 in the front-to-back direction. The fixing portion 51 is formed with a locking receiving portion into which the locking portion 52 is inserted and locked. The enlarged portion at the tip of the locking portion 52 is locked into the locking receiving portion. The fixing portion 51 is located overlapping the back side of the mounting recess 30.

[0038] When manufacturing the cover body 13, the cover main body 15 and decorative body 16 are formed in advance, and the locking portion 52 of the design portion 50 of the decorative body 16 is inserted into the hole portion 31 from the front side of the mounting recess 30 of the front panel portion 20 of the cover main body 15, and the enlarged portion at its tip is pressed into the locking receiving portion of the fixing portion 51 located on the back side of the mounting recess 30 of the front panel portion 20 of the cover main body 15, thereby firmly fixing the decorative body 16 to the cover main body 15 with the design portion 50 fitted into the mounting recess 30.

[0039] The completed cover body 13 is attached to the airbag device 3. The airbag device 3 is assembled by engaging the cover body 13 with the case body 10 in a state in which the airbag 11 and the inflator 12, which have been folded into a predetermined shape, are fixed to the bottom of the case body 10 via a retainer. The airbag device 3 and the lower cover are attached to the steering wheel main body 2. The case body 10 of the airbag device 3 is attached to the core metal of the steering wheel main body 2. Thereafter, the airbag device 3 is connected to a control device, a horn device, etc. as necessary, and the steering wheel 1 is completed.

[0040] When the vehicle is subjected to a collision impact, the inflator 12 of the airbag device 3 is activated in response to a signal from the control device, and gas is rapidly injected into the folded airbag 11, thereby inflating and deploying the airbag 11. At this time, the inflation pressure of the airbag 11 acts on the area 22 of the front panel portion 20 of the cover body 13 from the rear side, causing the front panel portion 20 to split open at the intended rupture portion 40, causing the intended upper door portion 42 to rotate upward about the first hinge portion 35 and the intended lower door portion 43 to rotate obliquely downward about the third hinge portion 38, thereby forming a projection opening, and the airbag 11, which inflates from the cover body 13 into the vehicle compartment through this projection opening, deploys in front of the occupant, restraining and protecting the occupant who is moving forward.

[0041] At this time, with regard to the cover body 13, the first portion 45 of the intended rupture portion 42 is set to be shifted downward from the deployment center of the airbag 11, so that not only is the intended upper door portion 42 formed to be larger than the intended lower door portion 43, but also the decorative body 16 is attached to the intended upper door portion 42, and since it deploys upward around the first hinge portion 35, it is less likely to deploy than the intended lower door portion 43 due to the influence of gravity and is more likely to remain on the deployment path of the airbag 11 (the range between the dashed dotted lines P, P in the figure). Moreover, since the bent portion 33 is set in the intended upper door portion 42 as part of its original design shape, when the airbag 11 deploys, the lower end of the range of the first surface portion 25 below the bent portion 33, i.e., the position of the first portion 45 of the intended rupture portion 40, of the intended upper door portion 42 is likely to remain on the deployment path of the airbag 11 until it is completely rotated.

[0042] Therefore, in this embodiment, by forming the second hinge portion 36 on the back side of the bent portion 33, as shown by the two-dot chain line in FIG. 1, the first surface portion 25 from the bent portion 33 to the lower end of the upper door portion 42 can be rotated further upward by bending from the second hinge portion 36, and by setting the first hinge portion 35 inward from the surface layer of the wall portion 21, the upper door portion 42 becomes more likely to deploy around the first hinge portion 35 when subjected to the initial stress when the airbag 11 deploys, and Furthermore, because the first hinge portion 35 and the second hinge portion 36 are approximately parallel, when the first surface portion 25 rotates from the second hinge portion 36, the first surface portion 25 and the second surface portion 26 become approximately horizontal, making it easier for a load to be applied from above to the bottom tear portion 46a of the second part 46 of the intended rupture portion 40 as a reaction force to the rotation, which promotes early tearing up to the bottom tear portion 46a and quickly moves the entire intended upper door portion 42 out of the deployment path of the airbag 11, thereby improving the deployment behavior of the airbag 11.

[0043] Therefore, even if the first part 45 of the intended breaking portion 40 is positioned downward from the center of deployment of the airbag 11 and the decorative body 16 is placed within the intended upper door portion 42, the airbag 11 can be deployed with good behavior.

[0044] Therefore, even if the bending portion 33 is positioned between the upper edge of the decorative body 16 and the first hinge portion 35 in the vertical direction, the decorative body 16 is positioned on the upper door-designated portion 42, and the first part 45 of the breaking portion 40 is set along its lower edge to avoid the decorative body 16, and the upper door-designated portion 42 is larger than other door-designated portions, for example, the lower door-designated portion 43, good unfolding behavior can be obtained by adopting the above configuration.

[0045] This also provides an advantage in terms of protection for occupants in an unsteady seated state (so-called OOP (out of position) state), for example.

[0046] In one embodiment, the door portion only needs to have at least an upper door portion 42, and may have one lower door portion 43 to open both up and down, or may have a single-opening shape without the lower door portion 43. [Industrial Applicability]

[0047] The present invention is suitably used as a cover body for an airbag device for the driver's seat of a vehicle such as an automobile. [Explanation of symbols]

[0048] 3 Airbag device 11 Airbag 13 Cover body 16 Decoration 20 Top panel 21 Wall 22 Area 25 First page 26 Second surface part 33 Bend 35 First hinge part 36 Second hinge part 40 Breaking section 42 Upper door planned part which is the door planned part 45 Part 1 46 Second part

Claims

1. A cover body for an airbag device that is disposed to cover an airbag in a folded state, The top plate and a wall portion that projects from the rear side of the surface plate portion and is positioned to surround the area of ​​the surface plate portion facing the airbag; a decorative body disposed on the front panel portion in the area; The surface plate portion is A first surface portion on which the decorative body is located and which forms a part of the area; a second surface portion adjacent to an upper portion of the first surface portion via a bent portion along the left-right direction and constituting another part of the area; a first hinge portion formed in the area along the left-right direction on the back side of the second surface portion; a second hinge portion formed in the area on the rear side of the bent portion and substantially parallel to the first hinge portion; a breakable portion that is formed in the area so as to be breakable by the inflation pressure of the airbag and that divides a door portion that expands upward around the first hinge portion into the area, The intended breaking portion is a first portion formed along the left-right direction on the rear side of the first surface portion and positioned below the deployment center of the airbag and the decorative body; a second portion formed at a position along the left and right wall portions of the area from at least the back side of the first surface portion, across the second hinge portion, to the back side of the second surface portion. A cover body for an airbag device characterized in that:

2. The bent portion is disposed between the upper edge of the decorative body and the first hinge portion in the vertical direction.

2. The cover body for an airbag device according to claim 1.

3. The first portion of the intended breaking portion is disposed along the lower edge of the decorative body.

3. The cover body for an airbag device according to claim 1 or 2.

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