Occupant protection devices

Abstract

To provide an occupant protection device capable of appropriately restricting the movement of a seated occupant away from a seat, thereby protecting the occupant.SOLUTION: In an occupant protection device 70, shoulder restraining members 20 having flexibility are stored in portions on both the left and right sides of an occupant MP seated in a seat 1 including a seat part 10 and a backrest part 2 so as be able to protect the seated occupant. Upon actuation, the left and right shoulder restraining members are disposed on the front face sides of left and right shoulder parts MS of the occupant. The left and right shoulder restraining members have upper end 20a sides fixed to an upper end 3 side of the backrest part, and have lower end 20b sides connected to a take-up unit 30. When stored, the left and right shoulder restraining members are stored in such a manner as to: extend from the upper end side of the backrest part to both the left and right edge sides thereof so as to surround the left and right of the seated occupant; and pass from both the left and right edge sides of the seat part through a front edge 11c side of the seat part to be connected to the take-up unit. On the front edge side of the seat part, as a component actuated together with the take-up unit, there is disposed a lifting unit 40 for raising the front edge 11c side of a seat face 11 on which the occupant is seated.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to an occupant protection device for protecting an occupant seated in a seat. [Background technology]

[0002] Conventionally, there has been an occupant protection device that uses flexible belt-like shoulder restraint members that can restrain both the left and right shoulders of an occupant seated in a seat having a seat portion and a backrest portion to protect the occupant (see, for example, Patent Document 1). The shoulder restraint members are arranged on both the left and right sides of the upper body of the seated occupant, with their lower ends fixed to the lower ends of the backrest, and are held by a rotating arm at the upper end of the backrest and connected to a winding device. In this occupant protection device, left and right shoulder restraints are placed in standby position on the front side of the backrest on both the left and right sides of a seated occupant, and when activated, the left and right pivoting arms are pivoted from the outside of the occupant to the front side of the occupant, so that the upper ends of the left and right shoulder restraints supported by each pivoting arm are positioned in front of the occupant's left and right shoulders, and then the retracting device is activated to detach the left and right shoulder restraints from the pivoting arms and bring them into contact with the front sides of the occupant's left and right shoulders, thereby restraining the left and right shoulders. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2007-15541 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in conventional occupant protection devices, when activated, the left and right shoulder restraint members abut the front sides of the left and right shoulders of the occupant so that the left and right shoulders do not separate from the backrest, but the lower ends of the shoulder restraint members are fixed to the lower end of the backrest so that they are separated from the left and right hips of the occupant. Therefore, it is difficult for the left and right shoulder restraint members to accurately restrain the forward movement of the hips of the occupant themselves, and it is desirable for the occupant protection device to appropriately restrict the movement of the occupant, including the hips.

[0005] The present invention is devised to solve the above-mentioned problems, and has an object to provide an occupant protection device that can protect an occupant by suitably restricting the movement of a seated occupant away from the seat. [Means for solving the problem]

[0006] The occupant protection device according to the present invention is capable of protecting an occupant seated in a seat having a seat portion and a backrest portion, An occupant protection device configured such that flexible shoulder restraint materials are stored in areas on both the left and right sides of a seated occupant, and when activated, the left and right shoulder restraint materials are disposed in front of the left and right shoulders of the occupant, The left and right shoulder restraint members are respectively arranged with their upper ends fixed to the upper end side of the backrest portion and their lower ends connected to retraction devices arranged on the front edge side of the seat portion, and when stored, extend from the upper end side of the backrest portion to both left and right edges so as to surround the left and right of the seated occupant, extend downward from both left and right edges of the backrest portion to connect to both left and right edges of the seat portion, and are stored so as to be connected to the retraction devices from both left and right edges of the seat portion via the front edge side of the seat portion, and A lifting device is arranged on the front edge side of the seat portion and is configured to be operated together with the retracting device, for lifting up the front edge side of the seat surface on which the occupant is seated.

[0007] The occupant protection device according to the present invention is activated when an occupant needs to be restrained while seated in the seat (for example, when a vehicle collision is predicted or an actual collision occurs), and at that time, the lower ends of the left and right shoulder restraint members are wound up by a winding device, and the front edge sides of the seat portion are raised by a lifting device. In the stored state before being wound up, the left and right shoulder restraint members are stored so that they extend from the fixed ends on the upper end side of the backrest portion to the left and right edges of the upper end side of the backrest portion, then over the left and right edges of the backrest portion and the left and right edges of the seat portion, and extend to the front edge side of the seat portion. When the lower ends are pulled, the bent portions that bend from the left and right upper ends of the backrest portion to the sides are pulled forward, and the inertial force of this pull easily moves the shoulder restraint members from the upper surface sides to the front sides of the occupant's left and right shoulders, making it possible to restrain the front sides of the occupant's left and right shoulders. Furthermore, when the lifting device is activated on the front edge of the seat, the front edge of the seat surface is raised, and this raised area restricts forward movement of the occupant's thighs and buttocks. Furthermore, the wound-up left and right shoulder restraint members are positioned on both the left and right sides of the seated occupant, stretching in a substantially straight line from the front side of the shoulders at the upper end to the front edge of the seat at the lower end, and diagonally crossing the space between the backrest and seat when viewed from the side, so that left and right movement of the occupant can be restricted in the intermediate area between the upper and lower ends. In other words, the left and right shoulder restraints restrict the forward movement of the left and right shoulders of the seated occupant's upper body, the lifting device restricts the forward movement of the buttocks and thighs on the lower leg side, and furthermore, the intermediate area between the upper and lower ends of the left and right shoulder restraints restricts the left and right movement of the upper body including the waist and around the thighs.As a result, the occupant is properly protected by being prevented from moving forward away from the seat or from shifting left and right.

[0008] Therefore, the occupant protection device according to the present invention can protect the occupant by appropriately restricting the seated occupant from moving away from the seat.

[0009] In the passenger protection device according to the present invention, it is desirable that the winding device and the lifting device share a driving source during operation.

[0010] In this configuration, the components of the drive mechanism for the winding device and the lifting device mounted on the sheet can be shared, allowing for a simple configuration.

[0011] In addition, in the occupant protection device of the present invention, it is desirable that the left and right shoulder restraint materials are composed of a flexible core material that is wound up by the winding device and a flexible tube material that covers the core material.

[0012] In this configuration, when the winding device winds up the shoulder restraint material, it winds up the core material, so that the tube material comes into contact with the occupant or the seat bottom or backrest, and the core material itself passing through the inside of the tube material is pulled while being prevented from sliding against the occupant or the seat bottom or backrest, allowing the shoulder restraint material to be wound up smoothly. [Brief explanation of the drawings]

[0013] [Figure 1] 1 is a schematic front view of an occupant protection device according to an embodiment of the present invention; [Figure 2] 1 is a schematic left side view of an occupant protection device according to an embodiment. [Figure 3] 1 is a schematic front view of an occupant protection device according to an embodiment when activated; [Figure 4] 1 is a schematic left side view of an occupant protection device according to an embodiment when activated; [Figure 5] 3 is a partially cutaway cross-sectional view of a shoulder restraint member in the occupant protection device according to the embodiment. FIG. [Figure 6] 6 is a schematic cross-sectional view illustrating the lifting device of the passenger protection device according to the embodiment, showing the vicinity of the VI-VI portion of FIG. 1. FIG. [Figure 7] 7 is a schematic cross-sectional view illustrating a drive mechanism for a winding device and a lifting device of the passenger protection device according to the embodiment, showing the vicinity of the VII-VII portion of FIG. 1. FIG. [Figure 8] FIG. 10 is a schematic front view illustrating a lifting device according to a modified example of the embodiment. [Figure 9] FIG. 10 is a schematic side view illustrating a lifting device according to a modified example of the embodiment. [Figure 10]FIG. 10 is a schematic explanatory view illustrating the operation of the lifting device shown in FIGS. DETAILED DESCRIPTION OF THE INVENTION

[0014] An embodiment of the present invention will be described below with reference to the drawings. As shown in Figures 1 to 4, an occupant protection device 70 of the embodiment is mounted on a seat 1 having a seat portion 10 on which a vehicle occupant MP sits and a backrest portion 2, and is configured to include shoulder restraint materials 20 (L, R), a winding device 30 that winds up the shoulder restraint materials 20 (L, R), and a lifting device 40 that lifts the front edge 11c side of the seat portion 10.

[0015] A headrest 8 is provided on the backrest 2 of the seat 1 so as to extend upward from the upper end surface 4 of the upper end portion 3. The front surface 5 of the backrest 2 serves as a portion that receives the upper body MU of the occupant MP. The upper surface of the seat portion 10, i.e., the seat surface 11, serves as a portion that receives the seated occupant MP from below.

[0016] In addition, the upper end surface 4 near the center in the left-right direction of the upper end 3 of the backrest portion 2, i.e., near the left and right sides of the headrest portion 8, more specifically, near the upper part above the left and right clavicles MC (L, R) of the seated occupant MP, has the upper end 20a of the shoulder restraint material 20 (L, R) fixed as a fixed end to a bracket extending from a frame (not shown) of the backrest portion 2.

[0017] The left and right shoulder restraint members 20L, 20R are each flexible and elongated and are stored so as to surround the left and right sides of the seated occupant MP. That is, when stored, the shoulder restraint members 20L, 20R each extend from a fixed end 20a on the upper end 3 side of the backrest 2 toward both left and right edges 4a, 4b of the upper end surface 4 of the backrest 2, extend downward toward both left and right edges 5a, 5b of the backrest 2, connect to both left and right edges 11a, 11b of the seat portion 10, pass through openings 17(L, R) on the front edge 11c side of the seat portion 10, and are stored and arranged in the storage section 15 so as to be connected to a retraction device 30 arranged within the seat portion 10.

[0018] The storage compartment 15 is configured with an upper portion 15a (L, R) on the upper end surface 4 side of the backrest 2, side portions 15b (L, R) continuing from the upper portion 15a (L, R) and located on the left and right side surfaces 6, 7, 12, and 13 of the backrest 2 and seat 10, and a front portion 15c (L, R) continuing from the side portions 15b (L, R) and disposed on the front surface 14 side of the seat 10, extending toward the opening 17 (L, R). The storage compartment 15 is disposed in a fabric 1a (see FIGS. 6 and 7) disposed on the front surface of the seat 1, with a slit 16 provided in the fabric 1a to facilitate opening. The fabric 1a is disposed so as to cover the cushioning material 1b (see FIGS. 6 and 7), and the shoulder restraint members 20 (L, R) are disposed so as to be embedded in the cushioning material 1b.

[0019] In addition, the shoulder restraint material 20 (L, R) stored in the storage section 15 has bending sections 22 (L, R) that are bent downward at approximately right angles, arranged in the intermediate section 20c between the upper end (fixed end) 20a and the lower end 20b, on the left and right edges 4a, 4b side of the upper end surface 4 of the backrest section 2, so as to extend toward the left and right side surfaces 6, 7 of the backrest section 2.

[0020] Furthermore, in this embodiment, the shoulder restraint members 20(L,R) are composed of a strip-shaped core member 26 made of a flexible, low-stretch fabric or the like, and a substantially cylindrical tube member 27 made of a flexible, slippery synthetic resin such as polypropylene, which covers the core member 26 (see FIG. 5). The core member 26 is connected to the winding roller 36(L,R) of the winding device 30, and the tube member 27 is long enough to be stored in the vicinity of the upper portion 15a(L,R) of the storage section 15, the side portions 15b(L,R), and the upper region excluding the lower end of the front portion 15c(L,R). This length dimension is set so as to minimize interference with the periphery of the opening 17(L,R) on the front surface 14 of the seat portion 10 when the shoulder restraint members 20(L,R) are wound up. In other words, it is set so as not to abut against the front surface 14 of the seat portion 10 and cause buckling deformation. The tube material 27 has an outer diameter D of about 20 to 50 mm (about 30 mm in this embodiment).

[0021] The retracting device 30 is connected to the lower end 20b side of the shoulder restraint material 20 (L, R) and is arranged on the front edge 11c side of the seat portion 10 (the front portion 10a side of the seat portion 10) so that when activated, it can retract the shoulder restraint material 20 (L, R) in the stored state by pulling it toward the lower end 20b side.

[0022] In this embodiment, the winding device 30 is configured to include a motor 31 as a driving source whose operation is controlled by the control device 60, and a winding mechanism 32 that winds up the shoulder restraint material 20 (L, R) using the driving force of the motor 31.

[0023] The operation of the motor 31 as a drive source is controlled by the control device 60, and when in operation, the motor 31 drives and rotates the drive shaft 31a. The control device 60 receives a signal from a collision prediction sensor (not shown), such as a millimeter wave radar, that senses the prediction of a collision before an actual collision of the vehicle, and drives and rotates the motor 31 when the collision prediction sensor predicts a vehicle collision.

[0024] The winding mechanism 32 is rotatably supported by bearings 37 (L, R) within the front part 10a of the seat 10 and is configured to include a rotary shaft 35 disposed in the left-right direction, a worm gear 33 attached to the drive shaft 31a of the motor 31, a worm wheel 34 attached to the rotary shaft 35 and meshing with the worm gear 33, and two left and right winding rollers 36 (L, R) fixed to the rotary shaft 35. The left and right winding rollers 36 (L, R) respectively wind around the core material 26 at the lower ends 20b of the shoulder restraint members 20 (L, R), and as the drive shaft 31a of the motor 31 rotates, the worm wheel 34 meshing with the worm gear 33 rotates, causing the rotary shaft 35 to rotate so as to wind up the shoulder restraint members 20 (L, R). The left and right winding rollers 36 (L, R) are disposed behind and below the openings 17 (L, R) on the front surface 14 side of the seat 10.

[0025] The motor 31 and bearings 37 (L, R) are held by a bracket (not shown) extending from a frame disposed within the seat 10. The control device 60 is disposed in front of the seat 1 on the vehicle body side.

[0026] When the retracting device 30 is activated, the shoulder restraint material 20 (L, R) is retracted toward the lower end 20b, detached from the storage section 15, and positioned on both the left and right sides of the upper body MU to the thighs MF (L, R) of the occupant MP. In this case, before being rolled up, the shoulder restraint material 20 (L, R) is arranged so that the bent portions 22 (L, R) extend to the left and right from the fixed end 20a on the left and right edges 4a, 4b of the upper end surface 4 of the backrest portion 2, and due to the downward pulling force when the lower end 20b is rolled up, the bent portion 22 is pulled forward and further pulled downward to shorten its length, so that the intermediate portion 20c between the upper end 20a and the lower end 20b is arranged in a linear manner on both the left and right sides of the upper body MU and thighs MF of the seated occupant MP, excluding the shoulders MS, while the upper end 20ca is arranged in front of the left and right shoulders MS (L, R) of the occupant MP.

[0027] The lifting device 40 is disposed on the front portion 10a of the seat 10, which is the front edge 11c side, and is configured to operate together with the retracting device 30 to raise the front edge 11c side of the seat surface 11 on which the occupant MP is seated. When activated, the lifting device 40 operates to push up the push-up member 47 from a lower standby position P0 to a raised position P1. The push-up member 47 is configured to raise a flat upper end 48 at its upper end by a height dimension H of approximately 10 to 30 mm (approximately 20 mm in this embodiment), thereby raising the front edge 11c side of the seat surface 11 and restricting the forward movement of the buttocks MH and left and right thighs MF (L, R) of the occupant MP.

[0028] The lifting device 40 is configured to include a motor 41 as a drive source during operation, a lifting member 47, and a lifting mechanism 42. The motor 41 is shared with the motor 31 of the winding device 30, and also shares the worm gear 33, worm wheel 34, and rotating shaft 35 of the winding mechanism 32 of the winding device 30. That is, the lifting mechanism 42 shares the worm gear 33 meshing with the drive shaft 31a of the motor (41) 31 of the winding mechanism 32, the worm wheel 34 meshing with the worm gear 33, and the rotating shaft 35 to which the worm wheel 34 is attached and which is supported by bearings 37 (L, R). Furthermore, the lifting mechanism 42 is configured to include two pinions 43 attached to the rotating shaft 35, a pinion 44 meshing with the pinion 43, and a rack gear 45 disposed on the push-up member 47 and meshing with the pinion 44.

[0029] The push-up member 47 is formed from a synthetic resin such as rigid polypropylene or a lightweight metal material, and has a gate shape when viewed from the front, an upper end 48 extending in a generally plate-like shape in the left-right direction, and legs 49 (L, R) that support the upper end 48 at both left and right ends on the rear edge side, and a rack gear 45 that meshes with the pinion 44 is disposed on the front surface 49a of the legs 49 (L, R). Furthermore, the push-up member 47 is guided in its up and down movement by guides 50 disposed around the legs 49 (L, R).

[0030] When the lifting device 40 is in operation, when the motor (41) 31 is driven to rotate, the rotation of the drive shaft 31a of the motor 31 causes the worm wheel 34 meshing with the worm gear 33 to rotate, which rotates the rotating shaft 35, which rotates the pinion 43 provided on the rotating shaft 35, which rotates the pinion 44 meshing with the pinion 43, which then raises the rack gear 45 meshing with the pinion 44. As a result, the pushing-up material 47 is guided by the guide 50 and rises, pushing up the pushing-up portion 48 at the upper end from the standby position P0 to the raised position P1, thereby raising the front edge 11c side of the seat surface 11 on which the occupant MP is seated, and forming the raised portion 11d.

[0031] The gear ratio of the pinions 43, 44 is set so that when the winding device 30 rotates the winding rollers 36(L,R) to complete winding of the shoulder restraint members 20(L,R), the push-up material 47 is pushed up from the standby position P0 to the raised position P1, which is the push-up completion position. In other words, it is set so that the winding and push-up are completed simultaneously. Of course, a clutch mechanism with a reverse rotation prevention mechanism may be disposed on the pinion 44 side, and the gear ratio may be changed to complete the push-up before the winding is completed.

[0032] In the occupant protection device 70 of this embodiment, when a vehicle collision is predicted while the occupant MP is seated in the seat 1, the control device 60 activates the motor 31 (41) as the drive source for the retraction device 30 and the lifting device 40. When the motor 31 is activated and the drive shaft 31a is rotationally driven, the retraction mechanism 32 of the retraction device 30 is driven. That is, when the drive shaft 31a of the motor 31 is rotationally driven, the worm gear 33 attached to the drive shaft 31a rotates, which rotates the worm wheel 34 with which the worm gear 33 meshes, which in turn rotates the rotary shaft 35 to which the worm wheel 34 is attached. As a result, the retraction rollers 36(L,R) attached to the rotary shaft 35 rotate, and the lower ends 20b of the shoulder restraint members 20(L,R) are pulled into the openings 17(L,R). At the same time, the lifting device 40, which shares the motor 31 (41) as the driving source and the rotating shaft 35 of the lifting mechanism 42, rotates the pinion 43, rotates the pinion 44 meshing with the pinion 43, and raises the rack gear 45, thereby raising the pushing-up portion 48 of the pushing-up material 47 from the standby position P0 to the raised position P1, and the front edge 11c side of the seat portion 10 rises.

[0033] In addition, when the left and right shoulder restraint members 20 (L, R) are stored in a state before being rolled up, they extend from the fixed end 20a on the upper end 3 side of the backrest portion 2 to the left and right edges 4a, 4b on the upper end 3 side of the backrest portion 2, then through the left and right edges 5a, 5b of the backrest portion 2 and the left and right edges 11a, 11b of the seat portion 10, and extend toward the front edge 11c of the seat portion 10.When the lower end 20b side is pulled, the bending portions 22 (L, R) that bend from the left and right edges 4a, 4b on the upper end surface 4 side of the backrest portion 2 toward the side surfaces 6, 7 are pulled forward, and due to the inertial force, they are easily positioned from the upper surface side to the front side of the left and right shoulders MS (L, R) of the occupant MP, making it possible to restrain the front sides of the left and right shoulders MS (L, R) of the occupant MP.

[0034] Furthermore, when the lifting device 40 is operated on the front edge 11c side of the seat 10 to raise the front edge 11c side of the seat surface 11, the raised portion 11d restricts the forward movement of the thighs MF (L, R) and buttocks MH of the occupant MP.

[0035] Furthermore, the wound-up left and right shoulder restraint materials 20 (L, R) are positioned on both the left and right sides of the seated occupant MP, extending in an approximately straight line from the front side of the shoulder portion MS (L, R) on the upper end (fixed end) 20a side to the front edge 11c side of the seat portion 10 on the lower end 20b side, and diagonally crossing the space between the backrest portion 2 and the seat portion 10 when viewed from the side (see Figure 4), thereby restricting the left and right movement of the occupant MP at the intermediate portion 20c between the upper end 20a side and the lower end 20b side. In other words, the left and right shoulder restraint members 20 (L, R) restrict the forward movement of the left and right shoulders MS (L, R) of the upper body MU of the seated occupant MP, and the lifting device 40 restricts the forward movement of the buttocks MH and thighs MF (L, R) on the lower leg side.Furthermore, the intermediate portion 20c between the upper and lower ends of the left and right shoulder restraint members 20 (L, R) restricts the left and right movement of the upper body MU including the waist MW and the vicinity of the thighs MF (L, R).As a result, the occupant MP is properly protected by being prevented from moving forward away from the seat 1 or from shifting left and right.

[0036] Therefore, the occupant protection device 70 of the embodiment can appropriately restrict the seated occupant MP from moving away from the seat 1, thereby protecting the occupant MP.

[0037] Furthermore, in the embodiment of the occupant protection device 70, when activated, the seated occupant MP is prevented from moving forward or shifting to the left or right so as to move away from the seat 1. Therefore, even if the seat 1 is facing in various directions, such as being able to rotate left and right in the vehicle, when activated, the occupant MP can be restrained and protected so that they do not move away from the seat 1, thereby providing good protection performance.

[0038] In the passenger protection device 70 of this embodiment, the retracting device 30 and the lifting device 40 share the motors 31, 41 as a drive source during operation.

[0039] Therefore, in the embodiment, the components of the drive mechanisms of the winding device 30 and the lifting device 40 mounted on the seat 1 (specifically, the motors 31, 41 as the drive sources, and the worm gear 33, worm wheel 34, and rotating shaft 35 supported by bearings 37 (L, R) as the winding mechanism 32 and the lifting mechanism 42) can be shared, allowing for a simple configuration.

[0040] In addition, in the embodiment of the occupant protection device 70, the left and right shoulder restraint materials 20 (L, R) are composed of a flexible core material 26 that is wound up by the winding device 30, and a flexible tube material 27 that covers the core material 26.

[0041] Therefore, in the embodiment, when the winding device 30 winds up the shoulder restraint material 20 (L, R), it winds up the core material 26, so that the tube material 27, which has good sliding properties, comes into contact with the occupant MP, the seat portion 10 of the seat 1, and the backrest portion 2, and the core material 26 itself, which passes through the inside of the tube material 27, is pulled while being prevented from sliding against the occupant MP, the seat portion 10 of the seat 1, and the backrest portion 2, so that the shoulder restraint material 20 (L, R) can be wound up smoothly.

[0042] In the embodiment, the lifting device 40 uses motors 31, 41 that are also used as a driving source for the winding device 30, but a lifting device 40A that uses a spring material 51, as in the occupant protection device 70A shown in Figures 8 to 10, may also be used as a driving source for lifting the push-up material 47.

[0043] In this occupant protection device 70A, the same retracting device 30 as in the embodiment is used, but the push-up device 40A differs from the embodiment in that it uses a spring material 51 as the driving source for the push-up material 52 that raises the front edge 11c side of the seat portion 10.

[0044] 8 and 9, the push-up member 52 is configured to wait at a standby position P0 with spring material 51, which is a compression coil spring, in contact with both the left and right sides of its underside, and to rise to a raised position P1 when the urging force of the spring material 51 acts. As shown in FIGS. 10A and 10B, the push-up member 52 is placed at the standby position P0 with a locking portion 54, which protrudes from the underside of a substantially flat push-up section 53, locked to a locking release lever 56, and receives the urging force of the spring material 51. When the hook 56a of the locking release lever 56, which is locked to a locking ring 54a of the locking portion 54, disengages from the locking ring 54a and releases the locking of the locking portion 54, the push-up member 52 receives the urging force of the spring material 51 and rises to the raised position P1.

[0045] The release lever 56 is disposed so as to be rotatable in the front-rear direction by a pivotal support portion 56b, and has an abutment piece 56c extending forward from the pivotal support portion 56b. A protrusion 57a ​​of a cam 57 attached to the rotary shaft 35 can abut against the abutment piece 56c.

[0046] That is, in this lifting device 40A, the motor 31 of the winding device 30 receives an activation signal from the control device 60 and is driven to rotate, causing the worm gear 33 of the winding mechanism 32 to rotate, which in turn rotates the worm wheel 34 meshing with the worm gear 33, causing the winding roller 36 (L, R) to rotate and wind up the shoulder restraint member 20 (L, R). When the rotating shaft 35 is rotated, the cam 57 rotates, causing the protrusion 57a ​​to come into contact with the abutment piece 56c, causing the hook 56a of the locking release lever 56 to rotate backward, and the hook 56a of the locking release lever 56 releases the locking ring 54a of the push-up member 52. As a result, the push-up member 52 is pushed up from the standby position P0 to the raised position P1 under the force of the spring member 51, causing the front edge 11c of the seat 10 to rise, forming a raised portion 11d. At this time, the shoulder restraint members 20 (L, R) are also wound up on the lower end 20b side.

[0047] Therefore, the passenger protection device 70A can also achieve the same functions and effects as the passenger protection device 70 of the embodiment. [Explanation of symbols]

[0048] 1...seat, 2...backrest portion, 3...upper end portion, 5a...left edge, 5b...right edge, 10...seat portion, 11a...left edge, 11b...right edge, 11c...front edge, 20(L,R)...shoulder restraint material, 20a...upper end, 20b...lower end, 26...core material, 27...tube material, 30...winding device, 31...(driving source) motor, 31a...drive shaft, 32...winding mechanism, 40, 40A...lifting device, 41...(driving source) motor, 42...lifting mechanism, 47...push-up material, 51...(driving source) spring material, 52...push-up material, 70, 70A...occupant protection device, P0...standby position, P1...raised position, MP...occupant, MS(L,R)...shoulder.

Claims

1. To be able to protect an occupant seated in a seat having a seat portion and a backrest portion, An occupant protection device configured such that flexible shoulder restraint materials are stored in areas on both the left and right sides of a seated occupant, and when activated, the left and right shoulder restraint materials are disposed in front of the left and right shoulders of the occupant, The left and right shoulder restraint members are respectively arranged with their upper ends fixed to the upper end side of the backrest portion and their lower ends connected to retraction devices arranged on the front edge side of the seat portion, and when stored, extend from the upper end side of the backrest portion to both left and right edges so as to surround the left and right of the seated occupant, extend downward from both left and right edges of the backrest portion to connect to both left and right edges of the seat portion, and are stored so as to be connected to the retraction devices from both left and right edges of the seat portion via the front edge side of the seat portion, and a lifting device that lifts up the front edge side of the seat surface on which the occupant sits, and that is configured to operate together with the retracting device, on the front edge side of the seat portion; An occupant protection device, wherein the winding device and the lifting device share a driving source during operation.

2. The occupant protection device according to claim 1, characterized in that the left and right shoulder restraint members are composed of a flexible core material that is wound up by the winding device and a flexible tube material that covers the core material.

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