JP2006281895A - Vehicular instrument panel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicular instrument panel capable of allowing the breakage of a tear line to smoothly advance, and preventing an instrument panel body from being broken at a part other than the tear line. <P>SOLUTION: A tear line 12 consists of two straight sections 13, 14 extending in the right-to-left direction parallel to each other, and connection sections 15, 16 provided between one ends and between the other ends of the straight sections 13, 14, respectively. The connection section 15 is formed semi-circular, and one end and the other end thereof are smoothly connected so as to be respectively brought into contact with each one end of the straight sections 13, 14. The connection section 15 is arranged so that its center portion is separated from the straight sections 13, 14 from both ends. The connection section 16 is symmetric to the connection section 15 in the right-to-left direction. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a vehicle instrument panel (hereinafter abbreviated as instrument panel), and more particularly to a hard instrument panel constituted by a single hard plate made of synthetic resin.

  In general, a tear line is formed at an end of the instrument panel on the passenger seat side. In this tear line, a portion surrounded by the tear line is separated from other parts of the instrument panel as an airbag door. When the airbag is inflated, the instrument panel is broken at the tear line. As a result, the airbag door is opened separately from the other parts of the instrument panel. The inflated airbag inflates from the opened portion to the passenger seat side.

  FIG. 5 is a diagram showing a tear line 2 formed in the conventional instrument panel 1, and the tear line 2 is adjacent to two straight portions 3 and 4 extending in parallel in the left-right direction and the straight portions 3 and 4. It is formed in a rectangular shape that is long on the left and right by connecting portions 5 and 6 that are formed so as to be orthogonal to the end portions.

  The tear line 2 is preset so as to be broken from the central portion of the straight portion 3 when the airbag (not shown) is inflated, for example, by adjusting the depth of each portion of the tear line 2. The broken portion proceeds from the central portion of the straight portion 3 to the left and right, reaches the central portion of the straight portion 4 through the connecting portions 5 and 6. Thereby, the airbag door 7 is cut off from the other part of the instrument panel 1, and the part of the airbag door 7 in the instrument panel 1 is opened. Then, an airbag (not shown) bulges from the opening.

JP 2000-108724 A

  When the broken part of the tear line 2 proceeds from the straight part 3 to the connecting parts 5 and 6 and from the connecting parts 5 and 6 to the straight part 4, the traveling direction suddenly changes to a right angle. For this reason, the breakage does not proceed smoothly, and the breakage of the entire tear line 2 is delayed. As a result, there is a possibility that a slight delay may occur in the inflation timing of the airbag toward the passenger seat. In addition, the breaking direction suddenly changes at the intersecting portions of the straight portions 3 and 4 and the connecting portions 5 and 6, and stress concentrates on the intersecting portions. There is a possibility that the vicinity of the intersection of 1 may break. Here, in the instrument panel 1 that is a hard instrument panel, measures are taken to prevent the broken pieces from being scattered on the airbag door 7, but no other measures are taken to prevent scattering. . For this reason, there is a possibility that the broken pieces that are broken from the vicinity of the intersecting portion are scattered.

In order to solve the above-mentioned problem, the first invention comprises a main body made of a synthetic resin hard plate material, with a tear line formed on the back surface, and the tear line is substantially parallel to two straight portions. In the vehicle instrument panel formed in a ring shape by the connecting portions that connect the two adjacent end portions of the two straight portions, the connecting portions, the both ends of the two straight portions are It is characterized in that it is constituted by a convex curve that is smoothly continuous so as to be in contact with the adjacent end portions, and that the center portion protrudes away from the linear portion with respect to both end portions.
Further, the second invention comprises a main body made of a synthetic resin hard plate material and having a tear line formed on the back surface, and the tear line includes two parallel outer straight portions that are substantially parallel to each other. A vehicle having a central straight line portion disposed substantially parallel to the outer straight line portions and a connecting portion that connects adjacent end portions of the outer straight line portion and the central straight line portion to each other. In the instrument panel, the connecting portion is smoothly continuous so that both end portions thereof are in contact with the adjacent end portions of the outer straight portion and the central straight portion, and the central portion is the outer side with respect to the both end portions. It is characterized by comprising a convex curve projecting away from the straight line part and the central straight line part.

According to 1st invention which has the said characteristic structure, since the straight part and the connection part are continuing smoothly, when the tear location of a tear line advances from a straight part to a connection part, and from a connection part to a straight part In both cases, the breakage proceeds smoothly. Therefore, it is possible to prevent a delay in the break of the entire tear line. In addition, since the straight portion and the connecting portion are smoothly continuous, stress does not concentrate on these continuous portions. Therefore, it is possible to prevent the instrument panel from breaking at locations other than the tear line.
According to the second invention, the same effect as the first invention can be obtained.

The best mode for carrying out the present invention will be described below with reference to the drawings.
FIG. 1 shows a first embodiment of an instrument panel according to the present invention. The instrument panel 10 includes an instrument panel body 11. The instrument panel body 11 is made of a hard synthetic resin plate, and is molded by an injection molding method or other molding methods.

  As shown in FIGS. 1 and 2, a tear line 12 is formed at the passenger seat side end of the back surface 11 a of the instrument panel body 11. The tear line 12 has a triangular cross section, but may have a rectangular cross section, a U-shaped cross section, or the like. Further, the tear line 12 is formed simultaneously with the molding of the instrument panel main body 11 by previously forming protrusions corresponding to the tear line 12 on the inner surface of a mold (not shown) for molding the instrument panel main body 11. It is also possible to perform processing with a laser beam, an end mill or the like after the instrument panel body 11 is formed.

  As shown in FIGS. 1 and 3, the tear line 12 has an annular shape by straight portions 13 and 14 and connecting portions 15 and 16 provided between one end and the other end of the straight portions 13 and 14, respectively. Is formed. The straight portions 13 and 14 extend in parallel to each other in the left-right direction, and are arranged at the same position in the left-right direction. The connecting portion 15 has a semicircular shape, and one end portion (the lower end portion in FIG. 3) is in contact with one end portion (the left end portion in FIG. 1) and the other end portion is the straight portion 14. It is in contact with one end. And the connection part 15 is arrange | positioned so that the center part may space apart from the linear parts 13 and 14 with respect to both ends. The connecting portion 16 is formed symmetrically with respect to the connecting portion 15, and one end thereof is in contact with the other end portion of the linear portion 13, and the other end portion is in contact with the other end portion of the linear portion 14.

  In the instrument panel 10 having the tear line 12 having the above-described configuration, as shown in FIG. 3, the tear line 12 is assumed to have started to break at the center of one straight line portion 13. The tear of the tear line 12 proceeds from the center of the straight portion 13 to the left and right, passes through the connecting portions 15 and 16 to the center of the straight portion 14, and the break ends. Then, the airbag door 17 surrounded by the tear line 12 is separated from the instrument panel main body 11, thereby forming a through hole corresponding to the airbag door 17 in the instrument panel main body 11. An airbag (not shown) inflates from the through hole toward the passenger seat.

  When the break in the tear line 12 proceeds from the straight portion 13 to the connecting portions 15, 16, the straight portion 13 and the connecting portions 15, 16 are in contact with each other and are smoothly continuous. The rupture progresses smoothly. Similarly, the progress of breakage from the connecting portions 15 and 16 to the straight portion 15 is performed smoothly. Therefore, the tear line 12 as a whole is broken in a short time. Therefore, it is possible to prevent a breakage delay from occurring. In addition, the direction of breakage does not change suddenly between the straight portions 13 and 14 and the connecting portions 15 and 16, and there is no intersection where stress is concentrated between them. Therefore, the instrument panel body 11 is not broken at portions other than the tear line 12.

  FIG. 4 shows a second embodiment of the present invention. In the instrument panel 10 ′ of this embodiment, the tear line 22 has two outer straight portions 23 and 24 and one central straight portion 25. The outer straight portions 23 and 24 extend in parallel in the left-right direction. The central straight portion 25 is disposed in the center between the outer straight portions 23 and 25 in parallel with them. The three straight portions 23, 24, and 25 are arranged at the same position in the left-right direction.

  Between one end portion of the outer straight portion 23 and the central straight portion 25, between the other end portions of the outer straight portion 23 and the central straight portion 25, between one end portions of the outer straight portion 24 and the central straight portion 25, and the outer straight portion. Connection portions 26, 27, 28, and 29 are provided between the other end portions of 24 and the central straight portion 25, respectively. The connecting portions 26 and 27 are configured in the same manner as the connecting portion 15 in the above embodiment, and the connecting portions 28 and 29 are configured in the same manner as the connecting portion 16 in the above embodiment.

  In the instrument panel 10 ′ having the tear line 22 configured as described above, it is assumed that the tear line 22 has started to break at the center of the central straight line portion 25. The break in the tear line 22 proceeds in the left-right direction from the central portion of the central straight portion 25, proceeds to the central portion of the outer straight portion 23 through the connecting portions 27, 28, and passes through the connecting portions 29, 30 to the outer straight portion 24. Proceed to the center. As a result, two airbag doors 17 and 17 are formed.

  When the breakage of the tear line 22 proceeds, the straight portions 23, 24, 25 and the connecting portions 26, 27, 28, 29 are in contact with each other and are smoothly continuous. There is no delay in the breakage of the entire tear line 22, and the instrument panel body 11 is not broken at a place other than the tear line 22.

In addition, this invention is not limited to said embodiment, In the range which does not deviate from the summary, it can change suitably.
For example, in the above embodiment, the connecting portions 15 and 16 and the connecting portions 26 to 29 are formed in a semicircular shape, but may be formed in an oval shape. In this case, the major axis of the ellipse may be directed in a direction orthogonal to the straight portions 13, 14; 23, 24, 25, or in a parallel direction.

It is a perspective view which shows 1st Embodiment of this invention. It is an expanded sectional view which follows the XX line of FIG. FIG. 3 is a view taken in the direction of arrow X in FIG. 2. It is a figure similar to FIG. 3 which shows the principal part of 2nd Embodiment of this invention. It is a figure similar to FIG. 3 which shows the tear line of the conventional instrument panel.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Instrument panel 10 'Instrument panel 11 Instrument panel main body 11a Back surface 12 Tier line 13 Straight line part 14 Straight line part 15 Connection part 16 Connection part 22 Tear line 23 Outer straight part 24 Outer straight part 25 Central straight part 26 Connection part 27 Connection part 28 connecting part 29 connecting part

Claims (2)

It is made of a synthetic resin hard plate and has a main body with a tear line formed on the back. The tear line has two linear parts that are substantially parallel to each other, and the two adjacent linear parts of the two linear parts. In the vehicle instrument panel formed in an annular shape by the connecting portion for connecting the
The connecting portion is smoothly continuous so that both end portions thereof are in contact with adjacent ends of the two straight portions, and the central portion protrudes so as to be separated from the straight portions with respect to both ends. An instrument panel for a vehicle comprising a convex curve. It is composed of a rigid plate made of synthetic resin, and has a main body with a tear line formed on the back surface. The tear line is substantially parallel between two outer straight portions that are substantially parallel to each other and the two outer straight portions. An instrument panel for a vehicle having a central straight line portion arranged substantially parallel to them, and a connecting part that connects adjacent end portions of the outer straight line part and the central straight line part,
The connecting portion is smoothly continuous such that both end portions thereof are in contact with adjacent end portions of the outer straight portion and the central straight portion, and the central portion is the outer straight portion and the central straight line with respect to both end portions. An instrument panel for a vehicle comprising a convex curve protruding so as to be separated from the portion.

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