JP3541687B2 - Sun visor for vehicles equipped with head protection airbag device - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention is directed to a head for injecting gas from an inflator when a predetermined high load is applied to a vehicle body side portion and inflating the airbag bag body stored along the roof side rail portion from the pillar portion into a curtain shape by the gas. The present invention relates to a sun visor for a vehicle equipped with a protective airbag bag.
[0002]
[Prior art]
In order to improve the protection performance of the head of the occupant sitting on the front seat when a predetermined high load is applied to the side of the vehicle body, the airbag is stored in a folded state over the front pillar portion and the roof side rail portion. A head protection airbag device for inflating a bag body in a curtain shape along a side window glass has already been proposed. Hereinafter, a configuration disclosed in WO 96/26087 which discloses this type of head protection airbag device will be described.
[0003]
As shown in FIG. 9, the head protection airbag device 100 includes a long duct 106 disposed from the front pillar portion 102 to the roof side rail portion 104, and a folded inside the duct 106. The airbag bag 112 is stored in a state and fixed to the vehicle body side at a front end fixing point 108 and a rear end fixing point 110, and is connected to a rear end of the duct 106 via a hose 114. An inflator 116 that blows out gas when a predetermined high load is applied to the airbag bag, and a band-shaped strap 118 having one end fixed to the vehicle body and the other end fixed to the rear end of the airbag body 112. It is configured as a major component. Further, the airbag bag body 112 is formed by connecting a plurality of cells 120 each formed in a substantially cylindrical shape and arranged with a substantially vertical direction of the vehicle as a longitudinal direction.
[0004]
According to the above configuration, when a predetermined high load acts on the vehicle body side, gas is blown from the inflator 116. Therefore, the ejected gas flows into each cell 120 of the folded airbag body 112 via the hose 114 and the duct 106. As a result, each cell 120 expands in a substantially cylindrical shape with the longitudinal direction substantially in the vehicle vertical direction, whereby the airbag bag body 112 expands in a curtain shape along the window glass 122. Furthermore, since the rear end of the airbag body 112 is connected to the vehicle body via the strap 118, the rear end of the airbag body 112 is surely arranged inside the upper part of the center pillar 124. It has become.
[0005]
[Problems to be solved by the invention]
However, in the head protection airbag device 100, since the airbag bag body 112 stored in the duct 106 in a folded state is disposed so as to extend from the front pillar portion 102 to the roof side rail portion 104, for example, , Covered with front pillar garnish and roof head lining. As a result, when the airbag bag is deployed, the front pillar garnish and the roof head lining are deformed, and the airbag bag is deployed toward the passenger compartment from these deformed portions. As a result, in order to block the sunlight from the side of the vehicle, the occupant sitting in the front seat moves the sun visor to the use position above the side window glass, that is, the vehicle interior side at the vehicle width direction outer edge of the roof head lining. , The deployed airbag bag interferes with the sun visor, the sun visor rotates around the front side attached to the vehicle body by the arm, and the sun visor body comes off the arm It is also possible.
[0006]
The present invention has been made in view of the above circumstances, and has as its object to provide a sun visor for a vehicle equipped with a head protection air bag that can prevent the sun visor body from coming off the arm when the air bag is deployed.
[0007]
[Means for Solving the Problems]
The present invention according to claim 1 is a sun visor for a vehicle equipped with a head protection airbag bag that extends in a curtain shape across the A pillar and the roof side rail,
A case fixed to the frame of the sun visor body,
An arm having one end attached to the vehicle body and the other end inserted into the bearing of the case;
Metal C-shaped retaining means attached only to the annular groove formed in the arm;
Is formed at a portion to avoid interference with the retaining means in the case, when a load loss relative to the arm to the case occurs, after the case has moved in a direction to exit from said arm, said retaining means A notch for preventing the case from coming off the arm by abutting ;
It is characterized by having.
[0008]
Therefore, when the sun visor is used at a position along the vehicle interior at the outer edge of the roof head lining in the vehicle width direction, when the head protection airbag bag is inflated and deployed, the sun visor is removed from the airbag bag. Under a large load, the sun visor body rotates together with the arm toward the front of the vehicle around the end of the arm attached to the vehicle body. As a result, a large detachment load is applied to the arm of the sun visor body. In this case, when a load is applied to the arm in the case, the case is moved in a direction in which the case is removed from the arm , and then the metal C-shaped stopper is attached to only the annular groove formed in the arm. Since the formed notch abuts firmly, it is possible to prevent the sun visor body from coming off the arm. In addition, the contact between the retaining means and the notch formed in the case increases the retaining strength of the sun visor body, so that even when the sun visor body is strongly pulled due to an operation error during use, the sun visor body is not removed. The arm can be prevented from coming off. In addition, since the cutout of the case is formed at a position that avoids interference with the C-shaped stopper, the C-shaped stopper does not interfere with the case when the sun visor is vertically rotated.
[0009]
According to a second aspect of the present invention, there is provided a sun visor for a vehicle equipped with the head protection airbag device according to the first aspect, wherein an end face of the retaining means and an end face of a cutout of the case come into contact with each other. Is prevented from coming off the arm.
[0010]
In addition to the contents described in claim 1, since the case is prevented from coming off the arm by contacting the end face of the retaining means and the end face of the notch of the case, the case is more reliably prevented from coming off the arm. it can.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
A first embodiment of a sun visor for a vehicle equipped with a head protection airbag device of the present invention will be described with reference to FIGS.
[0012]
In the drawings, the arrow FR indicates the vehicle forward direction, the arrow UP indicates the vehicle upward direction, and the arrow IN indicates the vehicle width inside direction.
[0013]
As shown in FIG. 6, the head protection airbag device 10 includes a sensor 12 for detecting a side collision state, a cylindrical inflator 14 that ejects gas when activated, an airbag bag body 16, As a main component. The sensor 12 is disposed near the lower end of the center pillar (B pillar) 18 and detects a side collision state when a side collision load of a predetermined value or more acts on the vehicle body side.
[0014]
The inflator 14 is provided near a connection between the front pillar (A-pillar) 20 and the instrument panel 22 and is connected to the sensor 12 described above. Therefore, when the sensor 12 detects the side collision state, the inflator 14 operates.
[0015]
At a middle part in the vertical direction in a side view of the airbag body 16, a plurality of longitudinal sections extending across the tension line T connecting the front end fixed point and the rear end fixed point of the airbag body 16 with the vertical direction of the airbag body 16. Are formed at predetermined intervals, and these non-inflated portions 24 form a plurality of substantially parallel cylindrical inflated portions that cross the tension line T when the airbag body is deployed. ing.
[0016]
The front end portion 16A of the airbag bag body 16 is arranged at the inflator disposition position so that gas ejected from the inflator 14 flows in. The upper end edge of the intermediate portion 16B is located at the front pillar 20 and the roof side. The rear end 16C is disposed along the rail 28, and the upper end edge of the rear end 16C is disposed near a quarter pillar (C pillar) 30.
[0017]
As shown in FIG. 5, the airbag bag body 16 is folded in a bellows shape in a substantially vertical direction to have a long shape, and is then formed on the front pillar garnish 26 and the vehicle width direction outer portion 42A of the roof head lining 42. It is housed straddling.
[0018]
As shown in FIG. 4, the roof side rail 28 includes a rail outer panel 48 having a substantially hat-shaped cross-section and relatively protruding to the outside of the passenger compartment, and a rail inner panel slightly protruding inward of the rail outer panel 48. And a rail reinforcement 49 formed in a substantially hat shape in cross section along the rail outer panel 48 and sandwiched between the rail outer panel 48 and the rail inner panel 40. The upper and lower ends of the rail outer panel 48, the rail inner panel 40, and the rail reinforcement 49 are joined by welding to form a closed cross section. The upper end of the roof side rail 28 composed of the three members is joined to the lower surface of the outer end 46A of the roof panel 46 in the vehicle width direction by welding, and the lower end of the roof side rail 28 has an opening. The weather strip 53 is fitted.
[0019]
The airbag bag body 16 is folded in the bag case 50 in a direction substantially perpendicular to the interior side surface 39A of the door glass 39 (the direction of the arrow K in FIG. 4), and the bag case 50 includes the rail inner panel 40 and the roof. It is stored between the head lining 42. When the airbag bag body 16 is deployed, the bag case 50 has a corner 50 </ b> A at the lower end in the vehicle width direction formed inside the bag case 50 due to the deployment and inflation force of the airbag bag body 16. The lid portion 50B is opened from the notch 51 to the interior of the vehicle with respect to the base portion 50C.
[0020]
At this time, in the roof side rail 28, the lid portion 50B pushes and expands a gap closed by the weather strip 53 between the roof head lining 42 and the rail inner panel 40 formed below the lid portion 50B. It is designed to expand into the vehicle cabin through the gap.
[0021]
The upper wall portion 50D of the lid portion 50B of the bag case 50 and the upper wall portion 50E of the base portion 50C are provided in parallel with the upper end portion 16D of the airbag body 16 interposed therebetween. Through holes are respectively formed in the upper wall portion 50D and the upper wall portion 50E of the bag case 50, and bolts 44 penetrating these through holes and the mounting holes of the upper end portion 16D of the airbag body 16 are provided. The bag case 50 is fixed together with the airbag bag body 16 to the vehicle interior side of the rail inner panel 40 by the nut 46 screwed to the bolt 44.
[0022]
The roof head lining 42 is made of resin and is composed of a base material 43 and a skin 45. When the air bag 16 is deployed, the roof head lining 42 is The outer portion 42A in the vehicle width direction opens toward the vehicle interior, and the airbag bag 16 is deployed into the vehicle interior through this gap.
[0023]
As shown in FIG. 5, a sun visor 54 is provided near the upper part of the front window 52. The sun visor 54 is located outside the roof head lining 42 at a position where the sunlight from the side of the vehicle is blocked. It is also possible to move to a position (the position indicated by a two-dot chain line in FIG. 5) along the vehicle interior side of 42A.
[0024]
That is, as shown in FIG. 4, one end 58A side of the arm 58 of the sun visor 54 is bent in an L-shape, and is attached to the bracket 60 in a substantially horizontal plane direction (the direction of arrow A and the direction of arrow B in FIG. 4). Direction).
[0025]
The bracket 60 is fixed to a header panel (not shown) via a roof head lining 42 by a self-tapping screw 62.
[0026]
As shown in FIG. 1, the other end 58 </ b> B of the arm 58 is inserted into a bearing 57 </ b> A of a metal case 57 provided on the main body 56 side of the sun visor 54. Further, a frame 64 made of a metal wire embedded in the outer peripheral portion of the main body 56 of the sun visor 54 is joined to the frame connecting portion 57B of the case 57.
[0027]
Reference numerals 65 and 67 in FIG. 1 indicate brackets provided on the frame 64, and a vanity mirror unit 69 is fixed to the bracket 65 by fixing means such as screws (not shown).
[0028]
As shown in FIG. 3, the arm 58 is formed of a round bar made of resin, and has an annular groove 66 formed in the outer peripheral portion. An E-ring 68 as a metal C-shaped retaining member is fitted into the annular groove 66.
[0029]
As shown in FIG. 2, a U-shaped notch 70 is formed in a portion of the case 57 facing the annular groove 66 of the arm 58, and the case 57 faces the arm 58 in the axial direction of the arm 58 ( When moving in the directions of arrows C and D in FIG. 2), the E-ring 68 comes into contact with the bearing 57 </ b> A of the case 57. That is, as shown by the two-dot chain line in FIG. 3, when the case 57 moves in the pulling-out direction (the direction of the arrow C in FIG. 2) with respect to the arm 58, the end surface 68A of the E-ring 68 and the case 57 The end face 57 </ b> C of the notch 70 is in contact with the notch 70, so that the case 57 can be prevented from coming off from the arm 58.
[0030]
The notch 70 prevents the E-ring 68 from interfering with the case 57 when the case 57 is rotated around the axis of the arm 58 (the direction of the arrow E in FIG. 2).
[0031]
As shown in FIG. 1, a well-known leaf spring 72 is disposed on the bearing 57 </ b> A of the case 57, and the leaf spring 72 and a flat part (not shown) formed on the outer periphery of the arm 58. The main body 56 of the sun visor 54 can be held at the storage position shown by the solid line in FIG.
[0032]
Next, a method for manufacturing the sun visor according to the present embodiment will be briefly described.
[0033]
In the present embodiment, a case 57 and a leaf spring 72 to which a frame 64 is joined are provided in an insert mold, and foam molding is performed using PP beads. After release, one end 58B of the arm 58 is inserted into the bearing 57A of the case 57, and the E-ring 68 is fitted into the annular groove 66 of the arm 58 in the notch 70 of the case 57. Thereafter, an elastic bag-shaped cover 74 (refer to FIG. 1) in which the design surface side is a knit fabric, the inside is urethane foam, and the inside of the urethane foam is vinyl, is covered from the lower side of the main body 56, and the upper end of the cover 74 The part (the end on the arm 58 side) 74A is ultrasonically welded.
[0034]
Next, the operation of the present embodiment will be described.
[0035]
In the present embodiment, when a side impact load of a predetermined value or more acts on the vehicle body side portion, the sensor 12 detects that a side collision has occurred. For this reason, the inflator 14 operates and a predetermined amount of gas is ejected. As a result, the airbag bag body 16 starts to inflate, and the inflated airbag bag body 16 pushes and opens the pillar garnish 26 of the front pillar 20 and the vehicle width direction outer portion 42A of the roof head lining 42 together with the bag case 50. It is swelled below the roof side rail 28 in a curtain shape. As a result, the airbag bag 16 is interposed between the side of the vehicle body and the occupant head to protect the occupant head.
[0036]
In this case, as shown by a two-dot chain line in FIG. 5, when the sun visor 54 is used at a position along the vehicle interior side in the vehicle width direction outer portion 42A of the roof head lining 42, the sun visor 54 becomes As shown in the drawing, the arm 58 receives a large load from the deployed airbag bag body 16 and rotates toward the vehicle front side around the end 58A on the vehicle body mounting side of the arm 58. As a result, a large detachment load is applied to the arm 58 in the sun visor body 56.
[0037]
As a result, the sun visor body 56 moves in the pulling-out direction (the direction of arrow C in FIG. 3) with respect to the arm 58, but as shown by the two-dot chain line in FIG. Since the end face 68A of the ring 68 and the end face 57C of the notch 70 of the case 57 are in contact with each other, the case 57 can be prevented from coming off from the arm 58.
[0038]
Further, the contact between the end face 68A of the E-ring 68 and the end face 57C of the notch 70 increases the strength of the sun visor body 56 to prevent the sun visor body 56 from coming off. Therefore, even when the sun visor body 56 is strongly pulled due to an operation error during use. The sun visor body 56 can be prevented from coming off the arm 58.
[0039]
Further, in the present embodiment, since the E-ring 68 is located in the notch 70 of the case 57, the E-ring 68 and the case 57 may interfere with each other when the sun visor 54 is rotated vertically (in the direction of the arrow E in FIG. 2). There is no.
[0040]
Next, a second embodiment of a sun visor for a vehicle equipped with the head protection airbag device of the present invention will be described with reference to FIGS.
[0041]
The same members as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.
[0042]
As shown in FIG. 7, in the present embodiment, the arm 58 includes a pipe-shaped arm 80 made of resin and a metal pipe 82 provided inside the pipe-shaped arm 80. A harness for a vanity mirror lamp (not shown) is inserted through the metal pipe 82.
[0043]
As shown in FIG. 8, the metal pipe 82 is insert-molded on the inner periphery of the pipe-shaped arm 80, and the metal pipe 82 has a hemispherical convex portion 82A formed by hydraulic molding or the like. As a result, a protrusion 84A containing the protrusion 82A of the metal pipe 82 is formed on the outer periphery of the arm 80 by the protrusion 82A of the metal pipe 82.
[0044]
For this reason, when attaching the arm 58 to the bearing portion 57A of the case 57, the projecting portion 84 is set at a position between the pair of opposed frame coupling portions 57B of the case 57 (the position in FIG. 8), and the arm 58 is moved. After being inserted into the bearing portion 57A of the case 57 and the projecting portion 84 is moved to the position of the notch 70 (see FIG. 7) in this state, the arm 58 is rotated around the axis with respect to the case 57 (the direction of arrow F in FIG. 8). The projection 84 is moved into the notch 70 by, for example, 90 degrees rotation.
[0045]
On the other hand, when the sun visor main body 56 moves in the pull-out direction with respect to the arm 58, the notch 70 of the case 57 is inserted into the protrusion 84 having the built-in protrusion 82A of the metal pipe 82 as in the first embodiment. The end face 57C is configured to abut.
[0046]
Next, the operation of the present embodiment will be described.
[0047]
As in the first embodiment, when a large detachment load is applied to the arm 58 in the sun visor body 56, in the present embodiment, a notch 70 is formed in a protrusion 84 formed in the arm 58 and having a built-in protrusion 82A of the metal pipe 82. End face 57C is in contact. For this reason, the case 57 can be prevented from coming off from the arm 58.
[0048]
Further, the contact between the protruding portion 84 and the end face 57C of the notch 70 increases the strength of the sun visor main body 56 to prevent the sun visor main body 56 from coming off. 56 can be prevented from coming off from the arm 58.
[0049]
In the present embodiment, since the protrusion 84 formed on the arm 58 is located within the notch 70 of the case 57, the protrusion 84 and the case 57 are rotated when the sun visor 54 is rotated up and down (in the direction of arrow G in FIG. 7). And do not interfere.
[0050]
Further, in the present embodiment, when assembling the arm 58 to the sun visor main body 56, the projecting portion 84 is set to a position (a position in FIG. 8) between the pair of frame connecting portions 57B of the case 57 facing each other. Is inserted into the bearing 57A of the case 57, and in this state, the protrusion 84 is moved to the position of the notch 70 (see FIG. 7). For example, the arm 58 can be easily attached to the bearing 57A of the case 57 by rotating the projection 84 into the notch 70 by, for example, 90 degrees rotation, and the assembling workability is good.
[0051]
In the above, the present invention has been described in detail with respect to a specific embodiment, but the present invention is not limited to such an embodiment, and various other embodiments are possible within the scope of the present invention. Some will be apparent to those skilled in the art. For example, in the first embodiment, a round bar made of resin is used for the arm 58, but a round bar made of metal may be used instead of the round bar made of resin. Further, in the first embodiment, the E-ring 68 is used as the metal C-shaped retaining device. However, instead of the E-ring 68, another C-shaped retaining device such as a C-ring is used. May be.
[0052]
Further, in each embodiment, the structure in which the folded airbag body 16 is accommodated in the bag case 50 is employed, but the bag case 50 is not always necessary, and the folded airbag body 16 is easily broken. The airbag 16 may be held in a folded state by being partially wrapped with a wrapping material or temporarily temporarily fixed using a tape-shaped surface fastener.
[0053]
【The invention's effect】
The sun visor for a vehicle equipped with the head protection air bag according to the first aspect of the present invention has an excellent effect that the sun visor body can be prevented from coming off the arm when the air bag is deployed. Further, even when the sun visor body is strongly pulled due to an operation error during use, there is an excellent effect that the sun visor body can be prevented from coming off the arm.
[0054]
The sun visor for a vehicle equipped with the head protection airbag bag according to the second aspect of the present invention has an excellent effect that the case can be more reliably prevented from coming off the arm in addition to the effect according to the first aspect. Having.
[Brief description of the drawings]
FIG. 1 is a diagram showing a use state of a sun visor of a vehicle equipped with a head protection airbag device according to a first embodiment of the present invention on a vehicle front side, as viewed from the rear of the vehicle.
FIG. 2 is a perspective view, partially in section, of a main part of a sun visor of a vehicle equipped with the head protection airbag device according to the first embodiment of the present invention.
FIG. 3 is a sectional view taken along line 3-3 in FIG. 2;
FIG. 4 is an enlarged sectional view taken along line 4-4 in FIG. 5;
FIG. 5 is a schematic diagram showing a side surface of a driver's seat side of a vehicle compartment to which a sun visor of a vehicle equipped with the head protection airbag device according to the first embodiment of the present invention is applied.
FIG. 6 is a schematic diagram showing a completed deployment state of an airbag bag body on a driver's seat side of a vehicle cabin to which a sun visor of a vehicle equipped with the head protection airbag device according to the first embodiment of the present invention is applied. is there.
FIG. 7 is a perspective view, partially in section, of a main part of a sun visor of a vehicle equipped with a head protection airbag device according to a second embodiment of the present invention.
FIG. 8 is a sectional view illustrating a method of assembling a sun visor of a vehicle equipped with a head protection airbag device according to a second embodiment of the present invention.
FIG. 9 is a schematic side view showing a completed deployment state of an airbag body in a head protection airbag device according to a conventional embodiment.
[Explanation of symbols]
Reference Signs List 10 head protection airbag device 14 inflator 16 airbag bag body 20 front pillar 26 front pillar garnish 28 roof side rail 40 rail inner panel 42 roof head lining 54 sun visor 56 sun visor main body 58 arm 57 case 64 frame 68 E-ring (C Character-shaped retaining means)
70 Notch 80 Pipe-shaped arm 82 Metal pipe 82A Convex part 84 Projection part

Claims (2)

In a sun visor of a vehicle equipped with a head protection airbag bag that unfolds in a curtain shape over an A pillar and a roof side rail,
A case fixed to the frame of the sun visor body,
An arm having one end attached to the vehicle body and the other end inserted into a bearing of the case;
A metal C-shaped retaining means attached only to the arm-formed annular groove;
Is formed at a portion to avoid interference with the retaining means in the case, when a load loss relative to the arm to the case occurs, after the case has moved in a direction to exit from said arm, said retaining means A notch for preventing the case from coming off the arm by abutting ;
A sun visor for a vehicle equipped with a head protection airbag device, comprising: The head protection airbag device according to claim 1, wherein the case is prevented from coming off from the arm by contacting an end surface of the retaining means with an end surface of the notch of the case. Sun visor of the vehicle.

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