JP4348717B2 - Lower limb damage prevention device for seat equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a lower limb injury prevention device for seat equipment that prevents the occurrence of a lower limb injury caused by a passenger moving forward from a seat cushion in accordance with a collision of an automobile.
[0002]
[Prior art]
Generally, there is a seat belt as a device for restraining an occupant at the time of a car collision. Since this seat belt is hung on the shoulder from the flank of the occupant and over the upper body, the lower part of the occupant cannot be prevented from moving forward from the seat cushion due to the collision of the automobile.
[0003]
Depending on the movement of the lower half of the body, there is a risk of injury to the lower limbs caused by striking the toes or knees of the feet. In order to prevent the occurrence of this lower limb injury, it is preferable to equip the seat with a lower limb injury prevention device that can suppress the movement of the lower body due to a car collision as an auxiliary restraint device for the seat belt.
[0004]
[Problems to be solved by the invention]
The present invention prevents lower limb injury for seat equipment that pushes up the seat surface portion of the seat cushion from below in order to prevent the occurrence of lower limb injury due to the occupant moving forward from the seat cushion due to a car collision. An object is to provide an apparatus.
[0005]
[Means for Solving the Problems]
In the lower limb injury prevention apparatus for seat equipment according to claim 1 of the present invention, a substantially U-shaped jumping bar that swings up and swings the seat surface portion of the seat cushion from below and responds to a command from the impact sensor. And a pretensioner that swings and rotates the jump bar obliquely upward from the initial set position, a pulley piece that spans a tension wire extending from the pretensioner and that fixes and fixes the wire end of the tension wire,
The pulley piece is attached and fixed to the side near the shaft end of the jumping bar, and the pulley piece integral with the jumping bar is supported by the bearing so that it can rotate on the support shaft.
The base bracket is fixed to both side frames of the seat cushion frame, and the spindle of the pulley piece is fixed between the base bracket.
A shelf-like frame is provided so as to protrude from the base bracket opposite to the side where the jumping bar is attached, a pretensioner is attached to the shelf-like frame, and the entire device is assembled and installed under the seat cushion.
Further, a first projecting piece protruding from the outer periphery of the pulley piece is provided, and a leaf spring that can be spring-engaged with the first projecting piece is provided by projecting from the shelf-like frame at the swinging rotation position of the raising bar. The return rotation of the bar is configured to be able to be regulated by the first projecting piece that is spring-engaged with the plate surface of the plate spring at the swinging rotation position of the flip-up bar.
[0006]
In the lower limb obstacle prevention device for seat equipment according to claim 2 of the present invention, a second projecting piece projecting upward from the outer periphery of the pulley piece is provided together with a first projecting piece projecting downward from the outer periphery of the pulley piece, A stopper frame that can receive and lock the protruding piece is fixed between the base bracket and the shelf frame, and the swinging and rotating position of the lifting bar can be regulated by the second protruding piece that is locked by the stopper frame. It is configured by assembling.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, referring to the attached drawings, the illustrated apparatus for preventing lower limb injury is configured to be installed between the side frames f ₁ and f _{2 in} a seat cushion frame F as shown in FIG. The basic components include a substantially U-shaped jump bar 1 and a pretensioner 2 that swings and rotates the jump bar 1 obliquely upward in response to a command from an impact sensor (not shown). It is prepared for.
[0008]
The flip-up bar 1 is a U-shape that is located toward the rear of the seat cushion S, and is provided so as to be able to swing and rotate obliquely upward with both axial ends as fulcrums. As will be described later, the pretensioner 2 is provided with a pulling wire that extends outward, and the explosive loaded in the pretensioner 2 explodes in response to a command from the impact sensor to pull in the pulling wire and operate. Two pretensioners 2 are provided so that a pulling force by a pulling wire acts on both side shafts of the jumping bar 1.
[0009]
From this basic component, when the impact sensor is actuated in the illustrated leg prevention device, the pretensioner 2 pulls in the pulling wire, and the pulling wire moves the raising bar 1 from the rear of the seat cushion S to the front. As shown in FIG. 2, the seat surface portion of the seat cushion S is pushed up from below by the lifting bar 1 to prevent the occupant from moving forward from the seat cushion S. Equipped to do. The impact sensor is provided on the vehicle body side in the same manner as the one that operates the air bag device, and the one that operates the air bag device can also be used.
[0010]
The detailed configuration will be described. FIG. 3 shows the entire apparatus as seen from the jumping bar 1 in a swinging and rotating state of the jumping bar 1, and the constituent members of the jumping bar 1 and the pretensioner 2 described above are shown. In addition, it is fixed to the pulley frames 3a and 3b that are integrally attached and fixed to the side portions near both shaft ends of the jump bar 1 and both side frames f ₁ and f ₂ (see FIG. 1) of the seat cushion frame F. The base brackets 4a and 4b, the shelf-like frame 5 protruding from the base brackets 4a and 4b opposite to the mounting side of the lifting bar 1, and the support shaft 6 that rotatably supports the pulley pieces 3a and 3b are configured. Yes.
[0011]
The lifting bar 1 is formed by bending a pipe member, and has U-shaped receiving brackets 1a and 1b for attaching and fixing the pulley pieces 3a and 3b to the side portions near both shaft ends. The pretensioner 2 is attached and fixed to the shelf frame 5 by a support arm 50 raised from the shelf frame 5 and a screwing portion 20 provided on a side portion of the pretensioner 2.
[0012]
When the pulley pieces 3a and 3b are described based on the one side 3a, the pulley pieces 3a and 3b are provided as the one that spans the tension wire 21 extending from the pretensioner 2 as shown in FIG. 4 and that fixes and fixes the wire end of the tension wire 21. Yes. As shown in FIG. 5, each pulley piece 3 a includes a spacer ring 33 that sandwiches the main body ring portion 30 between the flange portions 31, 32 on both sides and is spaced from the jumping bar 1. It is assembled by fixing together. Further, the pulley pieces 3a are rotatably supported by the support shafts 6 by inserting support shafts 6 extending between the base brackets 4a and 4b in the central holes of the respective portions.
[0013]
The pulley piece 3 a is provided with a first protruding piece 31 b formed by a protruding piece 31 a bent from the outer periphery of the flange portion 31 and a protruding piece 32 a protruding from the outer periphery of the flange portion 32 as a stopper for restricting the return rotation of the jumping bar 1. ing. Further, a second projecting piece formed by projecting pieces 31 b and 32 b projecting upward from the outer peripheries of both flange portions 31 and 32 is provided as a stopper for restricting the swing rotation position of the jumping bar 1. The main body ring part 30 and the collar parts 31 and 32 are provided with a projecting piece 31c extending from a projecting piece 31a bent from the outer periphery of the collar part 31, and this projecting piece 31c is provided with a collar from the notch part 30a of the main body ring part 30. By being inserted into the insertion hole 32c of the part 32, it is assembled integrally.
[0014]
The base brackets 4a and 4b are provided with bearings 40 and 41 (indicated by reference numerals only on one side in FIG. 3) that are bolted to the side frames f ₁ and f ₂ of the seat cushion frame F as cylindrical receiving parts. It has been. Further, the support shaft 6 of the pulley pieces 3a and 3b is inserted between the center holes of the pulley pieces 3a and 3b and fixed between the base brackets 4a and 4b.
[0015]
As shown in FIG. 6, the shelf-like frame 5 is based on an outer frame frame 51 in which a pipe member is bent and bent, and a shelf plate portion 52 and a pretensioner 2 that is inclined obliquely downward on the left and right sides of the shelf plate portion 52. Assembly frame portions 53a and 53b. In this shelf-like frame 5, a projecting piece 60 protruding from the axial portion of the support shaft 6 is screwed to a screwing portion 54 provided on the shelf plate portion 52, whereby the support shaft 6 of the pulley pieces 3 a and 3 b is supported by the bearing. It is supported.
[0016]
Stopper frames 7a and 7b with which the second projecting pieces 31b and 32b (see FIG. 5) projecting upward from the flange portions 31 and 32 of the pulley pieces 3a and 3b are in contact with the base brackets 4a and 4b. Installation is fixed by hanging between the two. The stopper frames 7a and 7b have arm portions 70, 71 and 72 extending in three directions of the outer frame frame 51 and the shelf plate portion 52 together with the base brackets 4a and 4b. The shelf frame 5 is provided to reinforce the shelf frame 5 by being fixed to the brackets 4a and 4b, the outer frame frame 51, and the shelf plate portion 52, respectively.
[0017]
The shelf-like frame 5 is provided with a plate spring 8 by bolting and fixing it to the shelf plate portion 52 as shown in FIG. The leaf spring 8 is pressed and biased by the first projecting pieces 31a and 32a bent from the flanges 31 of the pulley pieces 3a and 3b as the pulley pieces 3a and 3b rotate. Protrusions 31 a and 32 a (see FIG. 5) bent from the flange portion 3 b are provided to restrict the return rotation of the spring bar 1 by elastically engaging the plate surface of the plate spring 8.
[0018]
In the occupant's lower limb prevention apparatus configured as described above, at the time of initial setting, the lifting arm 1 is in the position shown by the solid line in FIG. 8, and when the impact sensor is activated, the pretensioner 2 retracts and operates the pulling wire 21. The pulling wire 21 rotates the pulley pieces 3a and 3b, swings and rotates the jumping bar 1 diagonally upward (two-dot chain line position), and pushes up the seat surface portion of the seat cushion S from below, thereby occupant Can be prevented from moving forward out of the seat cushion S.
[0019]
When the jump bar 1 rotates to a predetermined position, the second protrusions 31b and 32b of the pulley pieces 3a and 3b come into contact with the stopper frames 7a and 7b as shown in FIG. Is stopped, and the first protrusions 31a and 32a of the pulley pieces 3a and 3b are elastically engaged with the leaf spring 8, so that the return rotation of the jump bar 1 is restricted. The jumping arm 1 pushes up and holds the seat surface portion of the seat cushion S from below with a protruding amount that prevents the occupant from moving forward from the seat cushion S.
[0020]
As the seat cushion S is pushed up and held, even if the seat cushion front side portion of the seat cushion S is biased in the direction of returning and falling, the seat frame front side portion of the seat cushion S is moved to the outer frame frame 51 of the shelf-like frame 5. In addition, by catching on the shelf plate portion 52, it is possible to prevent a return drop near the front portion of the seating surface. As a result, the seat cushion S near the front of the seating surface can be kept stable from the seating property.
[0021]
In addition to the above-described configuration, as shown in FIGS. 8 and 10, a locking clip 9 that is press-fitted from the shelf-like frame 5 into the axial portion of the jumping bar 1 is provided. As the locking clip 9, a clip formed by projecting a plurality of ridges around a shaft portion at a predetermined interval is used. The catching bar 1 is set at the initial position by assembling the locking clip 9 so that it can be detached from the axial portion of the jumping bar 1 with a predetermined pulling force applied to the jumping bar 1 from the pulling wire 21 of the pretensioner 2. it can.
[0022]
【The invention's effect】
As described above, according to the lower limb injury prevention apparatus for seat equipment according to claim 1 of the present invention, the impact sensor is activated, the pretensioner is retracted to actuate the pulling wire, and the pulling wire obliquely moves up the jumping bar. The seat cushion seat surface can be pushed up from below by swinging and rotating to prevent the occupant from moving forward out of the seat cushion, and to prevent damage to the lower limbs by striking the toes or knees of the foot. Occurrence can be prevented. Further, even if the seat cushion seat surface portion is pushed up from below by the jumping bar, the return rotation of the jumping bar is caused by the first protruding piece that is spring-engaged with the plate surface of the plate spring at the swinging rotation position of the jumping bar. Since it can be regulated, the seat cushion front side portion can be stably maintained from the seating property.
[0023]
In addition, since it can be mounted on the side frame of the seat cushion frame based on the base bracket and installed at the lower part of the seat cushion, it can be used for various seats as one unit.
[0024]
According to the lower limb obstacle prevention device for seat equipment according to claim 2 of the present invention, the occupant is displaced forward from the seat cushion by assembling the swinging rotation position of the jump bar so that it can be regulated by the second projecting piece. It is possible to push up the seat surface portion of the seat cushion from below with an appropriate amount of protrusion that prevents it from moving out.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram showing a schematic configuration of a seat-equipment lower limb obstacle preventing apparatus according to the present invention.
FIG. 2 is an explanatory view showing an operating state of the seat equipment lower limb obstacle preventing apparatus according to the present invention.
FIG. 3 is an explanatory diagram showing the overall configuration of the seat equipment lower limb obstacle preventing apparatus according to the present invention.
FIG. 4 is an explanatory view showing a configuration of a jumping bar and a pretensioner provided in the apparatus for preventing lower limb injury for seat equipment according to the present invention.
FIG. 5 is an explanatory diagram showing a configuration of a pulley piece provided in the seat-equipped lower limb obstacle preventing apparatus according to the present invention.
FIG. 6 is an explanatory diagram showing a configuration of a shelf-like frame provided in the seat-equipped lower limb obstacle preventing apparatus according to the present invention.
FIG. 7 is an explanatory diagram showing a configuration of a leaf spring provided in the seat-equipped leg injury preventing apparatus according to the present invention.
FIG. 8 is an explanatory view showing an initial set state of the seat equipment lower limb obstacle preventing apparatus according to the present invention.
FIG. 9 is an explanatory view showing an operating state of the seat equipment lower limb obstacle preventing apparatus according to the present invention.
FIG. 10 is an explanatory view showing a mounting structure of a locking clip provided in the seat equipment lower limb obstacle preventing apparatus according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Jump bar 2 Pretensioner 3a, 3b Pulley piece 31a, 32a 1st protrusion 31b, 32b 2nd protrusion 4a, 4b Base bracket 5 Shelf-shaped frame 6 Support shaft 7a, 7b Stopper frame 8 Leaf spring 9 Locking clip

Claims (2)

A lower limb obstacle prevention device for seat equipment that prevents the occurrence of lower limb damage due to a passenger moving forward and out of the seat cushion with a car collision,
A substantially U-shaped jumping bar that swings up and swings the seat surface of the seat cushion upward from below, and a pre-rotation that swings and swings upward from the initial set position in response to a command from the impact sensor. A tensioner and a pulley piece that spans a tension wire extending from the pretensioner and that fixes and fixes the wire end of the tension wire,
The pulley piece is attached and fixed to the side near the shaft end of the jumping bar, and the pulley piece integral with the jumping bar is supported by the bearing so that it can rotate on the support shaft.
The base bracket is fixed to both side frames of the seat cushion frame, and the spindle of the pulley piece is fixed between the base bracket.
A shelf-like frame is provided so as to protrude from the base bracket opposite to the side where the jumping bar is attached, a pretensioner is attached to the shelf-like frame, and the entire device is assembled and installed under the seat cushion.
In addition, a first protruding piece protruding from the outer periphery of the pulley piece is provided, and a leaf spring that can be spring-engaged with the protruding piece is provided protruding from the shelf-like frame at the swinging rotation position of the raising bar, and the raising bar is returned. A lower limb obstacle prevention device for seat equipment, which is assembled so as to be able to be restricted by a first projecting piece that is spring-engaged with a plate surface of a plate spring at a swinging rotation position of a jump bar.   A first protrusion protruding downward from the outer periphery of the pulley piece and a second protrusion protruding upward from the outer periphery of the pulley piece are provided, and a stopper frame capable of receiving and locking the second protrusion is provided as a base bracket and a shelf frame. 2. The seat equipment according to claim 1, wherein the seat is assembled so as to be able to be regulated by a second projecting piece that is fixedly suspended between the second projecting piece and the swinging rotation position of the jumping bar locked by a stopper frame. Lower limb injury prevention device.

Images