Crew protection devices

Abstract

To provide an occupant protection device which can suppress deterioration of aesthetic quality of a lap belt part in a configuration where the lap belt part is provided with an airbag.SOLUTION: An occupant protection device 10 comprises an airbag 30 provided on a lap belt part 13 of a seat belt 11, and an airbag cover 59 which is attached to the lap belt part 13 and houses a bag body part 30a of the airbag 30 in a folded state. A surface 59a of the airbag cover 59 is configured to have a high brightness area 59a1 which includes a center part of the surface 59a of the airbag cover 59 in the width direction of the lap belt part 13 and extends along the longitudinal direction of the lap belt part 13, and low brightness areas 59a2 which are areas on one side and on the other side of the high brightness area 59a1 in the width direction of the lap belt 13 and of which color is lower in brightness than the high brightness area 59a1.SELECTED DRAWING: Figure 7

Description

【Technical Field】 【0006】 , 【0001】 The present invention relates to an occupant protection device for protecting an occupant sitting on a vehicle seat. 【Background Art】 【0002】 Conventionally, as an occupant protection device for protecting an occupant, a configuration in which a seat belt for restraining the occupant to the seat is provided is widely known. Further, in Patent Document 1, a configuration in which an airbag is provided in a lap belt portion for restraining the waist of the occupant in the seat belt is described. 【Prior Art Documents】 【Patent Documents】 【0003】 【Patent Document 1】 Japanese Patent Translation No. 2002-506401 【Summary of the Invention】 【Problems to be Solved by the Invention】 【0004】 In the configuration of Patent Document 1, although the airbag is housed in the airbag cover in a folded state, compared with the configuration in which no airbag is provided in the lap belt portion, the lap belt portion is substantially enlarged due to the volume of the airbag or the like. Thereby, there is a possibility that the designability of the lap belt portion may be reduced. 【0005】 Therefore, an object of the present invention is to provide an occupant protection device capable of suppressing a decrease in the designability of a lap belt portion in a configuration in which an airbag is provided in the lap belt portion. 【Means for Solving the Problems】 【0006】 A typical configuration of the occupant protection device according to the present invention for solving the above problems is an occupant protection device for protecting an occupant seated in a seat, comprising: a seat belt having a lap belt portion that restrains the waist of the occupant seated in the seat; an inflator that releases inflation gas; an airbag provided in the lap belt portion, having a bag body portion that inflates when the inflation gas is supplied and catches the occupant; and a conduit portion connected to the inflator, which guides the inflation gas released from the inflator to the bag body portion and allows the inflation gas to flow into the bag body portion. The airbag comprises an airbag cover attached to the lap belt portion and accommodating the folded bag body portion, wherein the surface of the airbag cover opposite to the occupant-side surface when the seat belt is fastened to the occupant is provided with a first region that includes the central portion of the surface in the width direction of the lap belt portion and extends along the longitudinal direction of the lap belt portion, and a second region that is one end and the other end of the first region in the width direction and includes both ends of the surface in the width direction, and the second region has a lower brightness of color than the first region. 【0007】 According to the present invention, in an occupant protection device in which an airbag is provided in the lap belt portion, it is possible to suppress a decrease in the aesthetic appearance of the lap belt portion. [Brief explanation of the drawing] 【0008】 [Figure 1] This is a perspective view of a seat equipped with an occupant protection device according to one embodiment of the present invention. [Figure 2] This is a left side view of a seat equipped with an occupant protection device. [Figure 3] This is a front view of a seat equipped with an occupant protection device. [Figure 4] This is a left side view of the seat with the airbag inflated. [Figure 5] Figure 3 shows a cross-sectional view of the bag assembly cut along section AA. [Figure 6]This is a perspective view of the airbag assembly with the airbag inflated, seen from below. [Figure 7] These are plan views of the front and back surfaces of the airbag cover. [Figure 8] These are plan views of the front and back surfaces of airbag covers in other configurations. [Modes for carrying out the invention] 【0009】 The following describes the overall configuration of the occupant protection device 10 according to one embodiment of the present invention, with reference to the drawings. Note that the dimensions, materials, shapes, and relative arrangements of the components described below are not intended to limit the scope of this invention unless specifically stated otherwise. Furthermore, in the following description, the left-right direction refers to the left and right directions of the seat 1 on which the occupant protection device 10 is mounted, specifically the left and right directions as seen from the perspective of the occupant M seated on the seat 1. The front-rear direction refers to the front and rear directions of the seat 1, specifically the front and rear directions as seen from the perspective of the occupant M seated on the seat 1. The up-down direction refers to the upward and downward directions in the vertical direction. 【0010】 Figure 1 is a perspective view of seat 1 equipped with occupant protection device 10. Figure 2 is a left side view of seat 1. Figure 3 is a front view of seat 1, showing occupant M seated on seat 1 with seat belt 11 fastened and the inflated airbag 30 of occupant protection device 10 with a dashed line. Figure 4 is a left side view of seat 1 with airbag 30 inflated, showing occupant M seated on seat 1 with seat belt 11 fastened with a dashed line. For the sake of clarity, the airbag cover 59 of occupant protection device 10 is shown in white in Figures 1 to 4. The detailed form of the airbag cover 59 will be described later using other drawings. 【0011】 As shown in Figures 1 to 4, the occupant protection device 10 is mounted on the vehicle's seat 1 and protects the occupant M seated in the seat 1. The occupant protection device 10 consists of a seat belt 11, a bag assembly 29 equipped with an airbag 30, and an inflator 24 that supplies inflation gas to the airbag 30. The seat 1 comprises a backrest 2 and a seat 5. 【0012】 The seat belt 11 is a belt-shaped member that restrains the occupant M to the seat 1. The seat belt 11 is configured to be extendable from a winding mechanism 15 located inside near the upper left edge of the backrest 2. The lower end of the seat belt 11 is a fixed end that is fixed to an anchor member 17 located on the left side of the seat 5. A tongue 20 is also provided in the middle of the seat belt 11. The tongue 20 is fastened to a buckle 19 located on the right side of the seat 5 of the seat 1. When the occupant M is seated on the seat 1 and the tongue 20 is fastened to the buckle 19, the occupant M is wearing the seat belt 11. 【0013】 The seat belt 11, when worn by occupant M, has a shoulder belt portion 12 that extends from the tongue 20 toward the retraction mechanism 15 and is positioned on the front side of occupant M's upper body MU, restraining occupant M's upper body MU, and a lap belt portion 13 that extends from the tongue 20 toward the lower end 11b and is positioned on the front side of occupant M's waist MW, restraining the waist MW. In other words, the lap belt portion 13 is configured to restrain occupant M's waist MW. Occupant M can release the fastening of the tongue 20 to the buckle 19 and remove the tongue 20 from the buckle 19 by pressing a release button (not shown) provided on the buckle 19. 【0014】 The retraction mechanism 15 has a pretensioner mechanism 16 configured to stop the retraction of the seat belt 11 if it is retracted too quickly, and to retract the retracted seat belt 11 in the event of a vehicle collision or the like. The pretensioner mechanism 16 rotates the shaft around which the seat belt 11 is wound by operating a built-in gas generator, thereby instantly retracting the seat belt 11. 【0015】 The inflator 24 consists of an inflator body 25 that releases inflation gas and a pipe section 26 that guides the inflation gas released from the inflator body 25 to the airbag 30. The inflator body 25 is attached to the seat frame 4 that supports the seat portion 5 of the seat 1. The pipe section 26 extends from the inflator body 25 and is bent in a roughly L-shape so as to follow the bottom surface and side of the seat portion 5. 【0016】 The bag assembly 29 consists of an airbag 30 comprising a bag body 30a and a conduit 30b, a bag connecting part 52 that connects the airbag 30 to the wrap belt part 13, and an airbag cover 59. Before inflation gas is supplied from the inflator 24, the bag body 30a is folded and housed inside the airbag cover 59. The conduit 30b of the airbag 30 is connected to the pipe part 26 of the inflator 24, and takes in the inflation gas released from the inflator 24 and guides it to the bag body 30a. The base end 30b2 of the conduit 30b of the airbag 30 and the pipe part 26 of the inflator 24 are connected by being fastened with a clamp 27. The detailed configuration of each component constituting the bag assembly 29 will be described later. 【0017】 Next, the protective action of the occupant M by the occupant protection device 10 will be described. First, when the vehicle collides, the pretensioner mechanism 16 of the winding mechanism 15 is activated, and the seat belt 11 attached to occupant M is wound up to stabilize occupant M's seated position on the seat 1. As a result, the lap belt portion 13 of the seat belt 11 is pulled towards the tongue 20, and the shoulder belt portion 12 connected to the lap belt portion 13 is pulled towards occupant M's shoulder. 【0018】 Next, the inflator 24 operates, and the inflation gas is supplied from the inflator main body 25 to the bag main body portion 30a of the airbag 30 via the pipe portion 26 and the conduit portion 30b of the airbag 30. As a result, the bag main body portion 30a expands. Thereafter, the upper body MU of the occupant M that moves forward due to the impact of the vehicle collision is received by the bag main body portion 30a. In this way, the occupant protection device 10 protects the occupant M. 【0019】 Next, each member constituting the airbag assembly 29 will be described. FIG. 5 is a cross-sectional view of the airbag assembly 29 cut along the A-A cross-section shown in FIG. 3. FIG. 6 is a perspective view of the airbag assembly 29 in a state where the airbag 30 is inflated, as viewed from below, with the airbag cover 59 omitted. FIG. 7 is a plan view of the front surface 59a and the back surface 59b of the airbag cover 59. 【0020】 As shown in FIGS. 5 and 6, the airbag 30 includes a bag main body portion 30a that expands by being supplied with inflation gas and receives the occupant M, and a conduit portion 30b that is connected to the pipe portion 26 of the inflator 24 and guides the inflation gas discharged from the inflator 24 to the inlet 30a3a of the bag main body portion 30a to allow the inflation gas to flow into the bag main body portion 30a. The bag main body portion 30a and the conduit portion 30b are each formed of a base cloth for the bag, which is a woven fabric formed by plain weaving or the like of polyester fibers, and are connected by being sewn together. 【0021】 When inflation is completed, the bag main body portion 30a is disposed immediately in front of the occupant M, and includes a rear wall portion 30a1 that receives the upper body MU of the occupant M that moves forward, a front wall portion 30a2 that is disposed on the front side opposite to the rear wall portion 30a1, a lower wall portion 30a3 that is disposed on the lower side and is supported by the thigh portion MF of the occupant M, and left and right wall portions 30a4 and 30a5 that are disposed on the left and right, respectively. At the intermediate portion in the vertical direction of the rear wall portion 30a1 of the bag main body portion 30a, a bending stitch portion 30a1a is provided that is sewn to bend the upper portion of the rear wall portion 30a1 closer to the occupant M side when inflation of the bag main body portion 30a is completed. 【0022】 Furthermore, the lower wall portion 30a3 of the bag body portion 30a is provided with two inlets 30a3a, which are openings for allowing the expansion gas in the conduit portion 30b to flow in. In addition, the left wall portion 30a4 and the right wall portion 30a5 of the bag body portion 30a are provided with vent holes 30a4a and 30a5a, respectively, which are openings for exhausting any excess expansion gas that has flowed into the bag body portion 30a. 【0023】 The conduit section 30b is a cylindrical member that is connected to the pipe section 26 of the inflator 24 and the bag body section 30a, respectively, and extends along the longitudinal direction of the wrap belt section 13. The conduit section 30b has a communication port 30b1 that communicates with the inlets 30a3a of the bag body section 30a. The expansion gas inside the conduit section 30b flows into the bag body section 30a via the communication port 30b1 and the inlets 30a3a. 【0024】 The bag connecting portion 52 is a cylindrical member made of the same material as the base fabric for the bag that forms the airbag 30, and connects the airbag 30 to the wrap belt portion 13. The upper surface of the bag connecting portion 52 and the lower surface of the conduit portion 30b of the airbag 30 are sewn together. The space inside the cylinder of the bag connecting portion 52 is a belt insertion portion 52a through which the wrap belt portion 13 is inserted. By inserting the wrap belt portion 13 through the belt insertion portion 52a, the airbag 30 is connected to the wrap belt portion 13 via the bag connecting portion 52. 【0025】 The airbag cover 59 is a cylindrical member attached to the lap belt portion 13, and houses the entire bag body portion 30a, a part of the conduit portion 30b, the bag connecting portion 52, and a part of the lap belt portion 13 of the folded airbag 30 inside the cylinder. When the bag body portion 30a inflates, the airbag cover 59 receives pressure from the bag body portion 30a and ruptures to form an opening, allowing the bag body portion 30a to be unfurled through this opening. 【0026】 Furthermore, as shown in Figure 7, the airbag cover 59 has a strip shape with the longitudinal direction of the lap belt portion 13 being the longer side, and the width dimension L1 at the center in the longitudinal direction is set to be larger than the respective width dimensions L2 at one end 59m and the other end 59n. In other words, the width dimension of the airbag cover 59 narrows from the center in the longitudinal direction toward one end 59m and the other end 59n. Here, the longitudinal direction of the lap belt portion 13 and the longitudinal direction of the airbag cover 59 are approximately coincidental. Also, the width direction perpendicular to the longitudinal direction and thickness direction of the lap belt portion 13 is approximately coincidental with the width direction perpendicular to the longitudinal direction and thickness direction of the airbag cover 59. 【0027】 Furthermore, the airbag cover 59 is formed by sewing together a piece of synthetic leather, leather 59v, which constitutes a part of its surface 59a, and a piece of synthetic leather, leather 59w, which constitutes the entire surface 59b and a part of the surface 59a. Specifically, the airbag cover 59 is formed by bending the leather 59w into a U-shape, placing the leather 59v in the opening of this U-shape to form a cylindrical shape, sewing one end 59v1 of the leather 59v to one end 59w1 of the leather 59w, and sewing the other end 59v2 of the leather 59v to the other end 59w2 of the leather 59w. The airbag cover 59 is attached to the lap belt portion 13 by housing the aforementioned components, such as the lap belt portion 13 and the bag body portion 30a of the airbag 30, inside the cylindrical airbag cover 59 formed in this way. 【0028】 The surface 59a of the airbag cover 59, as used herein, is the surface opposite to the side of the airbag cover 59 facing the occupant M when the seat belt 11 is securely fastened to the occupant M, and is the surface visible in Figure 3. The back surface 59b of the airbag cover 59 is the surface facing the occupant M when the seat belt 11 is securely fastened to the occupant M, and is the surface visible in Figure 1, opposite to the surface 59a, and is the surface that comes into contact with the occupant M during normal use. 【0029】 Furthermore, leather 59v and leather 59w are synthetic leathers with different colors, and with respect to the lightness L* in the L*a*b* color space, the lightness of the color of leather 59w is set lower than the lightness of the color of leather 59v. As a result, the surface 59a of the airbag cover 59 is divided into a high-lightness region 59a1 (first region) with relatively high-lightness colors and a low-lightness region 59a2 (second region) with relatively low-lightness colors. The high-lightness region 59a1 is the leather 59v portion of the surface 59a of the airbag cover 59, and the low-lightness region 59a2 is the leather 59w portion of the surface 59a of the airbag cover 59. 【0030】 The high-brightness region 59a1 includes the central part C of the surface 59a of the airbag cover 59 in the width direction of the lap belt portion 13 and is a region that extends linearly along the longitudinal direction of the lap belt portion 13. In the width direction of the lap belt portion 13, the width dimension L3 of the high-brightness region 59a1 is set to be narrower than the width dimension L4 of the lap belt portion 13. In this embodiment, the high-brightness region 59a1 is milky white with a brightness L* set in the range of 7.0 to 10.0. As described above, the longitudinal direction of the lap belt portion 13 and the longitudinal direction of the airbag cover 59 are almost the same, and the width direction of the lap belt portion 13 and the width direction of the airbag cover 59 are almost the same. Therefore, the longitudinal direction and width direction of the lap belt portion 13 in the above definition of the high-brightness region 59a1 can be reinterpreted as the longitudinal direction and width direction of the airbag cover 59 and have the same meaning. 【0031】 The low-luminosity region 59a2 is the region on one end and the other end (both sides) of the surface 59a in the width direction of the lap belt portion 13 relative to the high-luminosity region 59a1, and includes the one end 59a3 and the other end 59a4 (both ends) of the surface 59a in the width direction. In this embodiment, the low-luminosity region 59a2 is black with a luminosity L* set in the range of 0 to 3.0. As described above, the longitudinal direction of the lap belt portion 13 and the longitudinal direction of the airbag cover 59 are almost the same, and the width direction of the lap belt portion 13 and the width direction of the airbag cover 59 are almost the same, so the longitudinal direction and width direction of the lap belt portion 13 in the above definition of the low-luminosity region 59a2 can be reinterpreted as the longitudinal direction and width direction of the airbag cover 59 and have the same meaning. 【0032】 This configuration produces the following effect. Specifically, the lightness L* in the L*a*b* color space is a measure that determines whether an expansive color appears to bulge out and a contracting color appears to shrink down. The smaller the lightness, the closer it approaches the contracting color and the more likely it is to appear smaller and contracted. Therefore, due to the effect of the contracting color in the low-lightness region 59a2, the areas around one end 59a3 and the other end 59a4 in the width direction of the surface 59a become less conspicuous, and the surface 59a of the airbag cover 59 appears thinner. As a result, although the lap belt portion 13 is substantially enlarged by the installation of the airbag 30, this enlargement becomes less noticeable. Thus, with the occupant protection device 10 of this embodiment, even if an airbag 30 is provided in the lap belt portion 13, it is possible to suppress a decrease in the aesthetic appeal of the lap belt portion 13. 【0033】 Furthermore, the width dimension L3 of the high-luminosity region 59a1, which is an expanding color that stands out due to the contrast with the contracting color in the low-luminosity region 59a2, is set to be narrower than the width dimension L4 of the lap belt portion 13. As a result, the surface 59a of the airbag cover 59 appears thinner than the lap belt portion 13. Therefore, this configuration further enhances the effect of suppressing the deterioration of the design of the lap belt portion 13 as described above. 【0034】 Furthermore, it is more preferable that the width dimension L3 of the high-brightness region 59a1 be set narrower than the width dimension L4 of the lap belt portion 13, as in this embodiment. However, if it is set to be at least less than or equal to the width dimension L4 of the lap belt portion 13, the conspicuous high-brightness region 59a1 will appear to be at least as narrow as the lap belt portion 13, thereby enhancing the effect of suppressing the deterioration of the design of the lap belt portion 13. 【0035】 Furthermore, the back surface 59b of the airbag cover 59 faces the occupant M side and is difficult to see when the seat belt 11 is fastened, but is positioned on the outside side and is easily visible when the seat belt 11 is not fastened (see Figure 1). In contrast, in this embodiment, the entire back surface 59b of the airbag cover 59 and the low-brightness region 59a2 of the surface 59a are formed from a single piece of leather 59w. Since the brightness of these colors is the same, the brightness of the color of the entire back surface 59b of the airbag cover 59 is set lower than the brightness of the color of the high-brightness region 59a1 of the surface 59a. This makes it possible to suppress the airbag cover 59 from being conspicuous and reducing its aesthetic appeal when the seat belt 11 is not fastened. 【0036】 Furthermore, the difference in brightness between the front surface 59a and the back surface 59b of the airbag cover 59 may be used to detect twisting of the lap belt portion 13 and the airbag cover 59. That is, for example, a sensor such as a camera that detects the airbag cover 59 as an image from the outside and a CPU electrically connected to this sensor may be provided, and the CPU may determine that there is no twisting of the lap belt portion 13 or the airbag cover 59 when the sensor detects the color of the high-brightness region 59a1 of the surface 59a, and determine that there is twisting when no detection is made. In addition, if the CPU determines that there is twisting of the lap belt portion 13 or the airbag cover 59, it may control the speakers, monitors, lighting etc. installed in the vehicle to notify the occupant M that there is twisting through sound, images, light, etc. 【0037】 In this embodiment, the entire back surface 59b of the airbag cover 59 is the same color as the low-luminance region 59a2 of the surface 59a. However, any other color with a lower luminance than the high-luminance region 59a1 of the surface 59a may be used. However, by making them the same color, the entire back surface 59b and the low-luminance region 59a2 of the surface 59a can be formed from a single material, and the high-luminance region 59a1 can be formed from a single material with a different color. By combining these, the airbag cover 59 can be formed, which is preferable because it allows for easy manufacturing of the airbag cover 59. 【0038】 Furthermore, in order to suppress the decrease in aesthetic appeal due to the substantial enlargement of the lap belt portion 13 when the seat belt 11 is not fastened, the back surface 59b may be configured to be color-coded into high-luminosity and low-luminosity areas, similar to the front surface 59a. In that case, as with the front surface 59a, the high-luminosity area of ​​the back surface 59b may have the same pattern or different patterns, as long as the width dimension of the high-luminosity area of ​​the back surface 59b is less than or equal to the width dimension L4 of the lap belt portion 13. 【0039】 Furthermore, although this embodiment describes a configuration in which the high-brightness region 59a1 of the airbag cover 59 extends linearly along the longitudinal direction of the wrap belt portion 13, the present invention is not limited to this. That is, for example, as shown in Figure 8, the same effect can be obtained by configuring the airbag cover 59 so that the width of the high-brightness region 59a1 narrows from the center of the airbag cover 59 in the longitudinal direction of the wrap belt portion 13 towards one end 59m and the other end 59n, in accordance with the width dimension of the airbag cover 59. 【0040】 Furthermore, in the example shown in Figure 8, a configuration was described in which the width of the high-brightness region 59a1 is the same from the center of the airbag cover 59 in the longitudinal direction of the lap belt portion 13 to a predetermined position on the one end 59m side and the other end 59n side, and then narrows from that predetermined position towards the one end 59m and the other end 59n, respectively. However, the width of the high-brightness region 59a1 may be configured to narrow gradually from the center of the airbag cover 59 in the longitudinal direction of the lap belt portion 13 to the one end 59m and the other end 59n. Note that the center of the airbag cover 59 in the longitudinal direction of the lap belt portion 13 referred to here is the part of the airbag cover 59 where the longitudinal distance to the one end 59m is equal to the longitudinal distance to the other end 59n. 【0041】 Furthermore, although this embodiment describes a configuration in which the airbag cover 59 is formed using two types of leather 59v and 59w of different colors, the present invention is not limited to this. That is, as long as the brightness of the colors of the surface 59a and back surface 59b of the airbag cover 59 are in the relationship described above, the same effect can be obtained even if it is formed using other materials or methods. For example, the airbag cover 59 may be formed from the same base fabric as the airbag 30, and paint may be applied to this base fabric to form a high-brightness region 59a1 and a low-brightness region 59a2. Alternatively, the low-brightness region 59a2 may be formed from multiple colors with lower brightness than the high-brightness region 59a1. 【0042】 Furthermore, although the occupant protection device 10 has been described using a so-called three-point seat belt 11, which comprises a shoulder belt portion 12 and a lap belt portion 13, as an example in this embodiment, the present invention is not limited thereto. That is, even if the present invention is applied to a so-called two-point seat belt 11, which has a lap belt portion 13 but does not have a shoulder belt portion 12, the same effects as described above can be obtained. [Explanation of symbols] 【0043】 1...Seat, 10...Occupant protection device, 11...Seat belt, 13...Wrap belt section, 24...Inflator, 30...Airbag, 30a...Bag body section, 30b...Conduit section, 59...Airbag cover, 59a...Surface, 59a1...High brightness area (first area), 59a2...Low brightness area (second area), 59b...Back surface

Claims

[Claim 1] An occupant protection device for protecting occupants seated in a seat, A seat belt having a lap belt portion that restrains the waist of an occupant seated in the aforementioned seat, An inflator that releases expansion gas, An airbag provided in the lap belt section, comprising: a bag body that inflates to catch the occupant when the inflation gas is supplied; and a conduit section connected to the inflator, which guides the inflation gas released from the inflator to the bag body and allows the inflation gas to flow into the bag body; An airbag cover attached to the aforementioned wrap belt portion and accommodating the folded bag body portion, Equipped with, On the surface of the airbag cover opposite to the occupant-side surface when the seat belt is fastened to the occupant, A first region including the central part of the surface in the width direction of the wrap belt portion and extending linearly along the longitudinal direction of the wrap belt portion, A second region which is a region on one end side and the other end side of the first region in the width direction, and which includes both ends of the surface in the width direction, and which has a lower brightness of color than the first region, A occupant protection device characterized by the provision of [a specific feature]. [Claim 2] An occupant protection device for protecting occupants seated in a seat, A seat belt having a lap belt portion that restrains the waist of an occupant seated in the aforementioned seat, An inflator that releases expansion gas, An airbag provided in the lap belt section, comprising: a bag body that inflates to catch the occupant when the inflation gas is supplied; and a conduit section connected to the inflator, which guides the inflation gas released from the inflator to the bag body and allows the inflation gas to flow into the bag body; An airbag cover attached to the aforementioned wrap belt portion and accommodating the folded bag body portion, Equipped with, On the surface of the airbag cover opposite to the occupant-side surface when the seat belt is fastened to the occupant, A first region including the central portion of the surface in the width direction of the wrap belt portion and extending along the longitudinal direction of the wrap belt portion, A second region which is a region on one end side and the other end side of the first region in the width direction, and which includes both ends of the surface in the width direction, and which has a lower brightness of color than the first region, A system was established, An occupant protection device characterized in that the width of the first region narrows from the center of the airbag cover in the longitudinal direction toward one end and the other end. [Claim 3] The occupant protection device according to claim 1, characterized in that the width of the first region narrows from the central part of the airbag cover in the longitudinal direction toward one end and the other end. [Claim 4] The occupant protection device according to claim 1, characterized in that the width of the first region is less than or equal to the width of the lap belt portion. [Claim 5] The occupant protection device according to any one of claims 1 to 4, characterized in that the brightness of the color of the entire back surface, which is the occupant-facing surface of the airbag cover, is lower than the brightness of the color of the first region.

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