US20150343931A1 - Seat belt device for the vehicle seat - Google Patents

Seat belt device for the vehicle seat Download PDF

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Publication number
US20150343931A1
US20150343931A1 US14/728,148 US201514728148A US2015343931A1 US 20150343931 A1 US20150343931 A1 US 20150343931A1 US 201514728148 A US201514728148 A US 201514728148A US 2015343931 A1 US2015343931 A1 US 2015343931A1
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US
United States
Prior art keywords
webbing
striker
shoulder
occupant
shaped
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US14/728,148
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English (en)
Inventor
Atsushi Koike
Tomohiro Amano
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tachi S Co Ltd
Original Assignee
Tachi S Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tachi S Co Ltd filed Critical Tachi S Co Ltd
Assigned to TACHI-S CO., LTD. reassignment TACHI-S CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: AMANO, TOMOHIRO, KOIKE, ATSUSHI
Publication of US20150343931A1 publication Critical patent/US20150343931A1/en
Priority to US15/662,846 priority Critical patent/US10272808B2/en
Abandoned legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/68—Seat frames
    • B60N2/688—Particular seat belt attachment and guiding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/64—Back-rests or cushions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R22/00—Safety belts or body harnesses in vehicles
    • B60R22/02—Semi-passive restraint systems, e.g. systems applied or removed automatically but not both ; Manual restraint systems
    • B60R22/023—Three-point seat belt systems comprising two side lower and one side upper anchoring devices
    • B60R22/024—Adaptations for use by small passengers, e.g. children
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R22/00—Safety belts or body harnesses in vehicles
    • B60R22/12—Construction of belts or harnesses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R22/00—Safety belts or body harnesses in vehicles
    • B60R22/18—Anchoring devices
    • B60R22/26—Anchoring devices secured to the seat
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R22/00—Safety belts or body harnesses in vehicles
    • B60R22/18—Anchoring devices
    • B60R2022/1806—Anchoring devices for buckles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R22/00—Safety belts or body harnesses in vehicles
    • B60R22/18—Anchoring devices
    • B60R2022/1818—Belt guides

Definitions

  • This invention relates to a seat belt device for the vehicle seat, which is designed to hold an occupant to the vehicle seat.
  • the three-point holding seat belt is broadly used to hold the occupant to the vehicle seat, at three points, i.e., the left or right shoulder and the left and right hips.
  • the three-point holding seat belt (or three-point seat belt) comprise webbing.
  • the webbing is taken up as a pulling force is applied to it from the retractor incorporated in, for example, a chassis pillar.
  • the webbing extends from the retractor, through the webbing feed port made in the pillar provided on the chassis wall and located above the upper end of the vehicle seat.
  • the occupant may hold, with hand, the tongue mounted on the webbing and insert the tongue into the buckle provided on one side of the seat cushion.
  • the upper half of the webbing used as a shoulder webbing is thereby wrapped around the occupant, slantwise from one shoulder, and the lower half of the webbing used as a wrap webbing is wrapped around the hips.
  • the seat belt holds the occupant to the vehicle seat.
  • the seat belt may fail to function effectively if the occupant undergoes a so-called submarine phenomenon, i.e., forward motion with his or her buttocks sinking in the seat cushion.
  • the webbing feed port made in the pillar is located positioned much farther above the occupant's shoulder than in the case an adult of ordinary physique wears the three-point holding seat belt.
  • the gap (hereinafter referred to as “gap”) between the shoulder webbing extending from the webbing feed port and the occupant's shoulder and the seatback is relatively large. Even if the webbing is tightened at an emergency to reduce the gap immediately, the seat belt can hardly press the occupant's shoulders onto the vehicle seat (more precisely, seatback) to hold the occupant steadily.
  • a three-point holding seat belt designed to control effectively the submarine phenomenon a small occupant may undergo is known. (Refer to, for example, JP 2010-173358A, JP 05-112204A and JP 2010-058723A.)
  • a first height adjusting mechanism is provided in a pillar, and a second height adjusting mechanism is provided on an upper part of that side of a seatback, which faces the pillar.
  • the first and second height adjusting mechanisms adjust the height (position) of the upper end of the shoulder webbing extending from the occupant's shoulder, reducing the above-mentioned gap.
  • Each of the first and second height adjusting mechanisms is composed of a base member and a sliding member.
  • the base member is shaped like a flat plate extending in vertical direction.
  • the base member of the first and the second height adjusting mechanisms are secured, respectively to the wall of the pillar and that side of the seatback, which faces the pillar.
  • the sliding members may slide up and down on the base members, respectively, and each can be locked at a given position (height) on the associated base member.
  • the sliding member of the first height adjusting mechanism has a webbing guide hole.
  • the sliding member of the second height adjusting mechanism has a hook for catching the webbing.
  • the occupant In order to wear the webbing, the occupant first adjusts the heights of the sliding members of the first and second height adjusting mechanisms, locking the sliding members, each at the given positions on the associated base member. Then, the occupant pulls the webbing from the webbing feed port made in the pillar, passes the webbing through the webbing guide hole of the first height adjusting mechanism and fastens the webbing extending through the webbing guide hole to the hook of the second height adjusting mechanism. Now extending through the first and second height adjusting mechanisms, the webbing extending slantwise from the occupant's shoulder is wrapped around the occupant's hips.
  • a guide anchor is provided on that upper part of the side of the seatback, which faces the pillar.
  • the guide anchor has a webbing guide hole, through which the webbing passes, and can be moved on that upper part of the side of the seatback, to a given position (height), by means of an electric drive mechanism.
  • the shoulder webbing extending from the webbing feed port made in the pillar passes through the webbing guide hole of the guide anchor and is wrapped around the occupant's hips from the occupant's shoulder.
  • a guide anchor is provided on the upper part of the back of the seatback, which opposes the pillar.
  • the guide anchor has a main part and an arm part.
  • the main part has a webbing guide hole for guiding the webbing.
  • the arm part supports the main part from below.
  • the arm part is coupled, at lower end, to a drive mechanism.
  • the arm part can be swung around its lower end as the drive mechanism operates.
  • the main part of the guide anchor In normal state, the main part of the guide anchor is positioned at the upper edge of that side of seatback, which opposes the pillar.
  • the shoulder webbing extends from the webbing feed port made in the pillar. Then, the shoulder webbing is guided through the webbing guide hole and wrapped around the occupant's shoulder.
  • the drive mechanism constituted by, for example, an inflator, operates, swinging the guide anchor to one side of the seatback from the upper edge of the seatback, which lies near the pillar.
  • the sliding member is changed in position with respect to the base members of the first and second height adjusting mechanisms.
  • the upper end of the shoulder webbing extending to the occupant's shoulder is thereby adjusted in height (position), reducing the above-mentioned gap.
  • the second height adjusting mechanisms may be used to adjust the position of the sliding member, allowing the webbing to extend from the occupant's side, not from above the occupant's shoulder. This narrows the gap.
  • the second height adjusting mechanism is, however, secured to the upper edge of the seatback, which lies near the pillar.
  • the shoulder webbing will be spaced from the occupant's shoulder if the occupant is small in physique.
  • a gap (distance) extending in the widthwise direction of the vehicle seat is provided between the shoulder webbing and the occupant's shoulder.
  • the gap is broader than in the case where the occupant has ordinary physique.
  • the shoulder webbing cannot be tightened to hold the occupant in emergency, and can hardly control the submarine phenomenon.
  • the guide anchor is changed in position at an upper part of that side of a seatback.
  • the height (position) of the upper end of the shoulder webbing extending to the occupant's shoulder is thereby adjusted, narrowing the gap.
  • the drive mechanism operates in emergency, rotating the main part of the guide anchor around the lower end of the arm part.
  • the main part of the guide anchor therefore moves to the side of the seatback from the upper edge of the seatback, which lies near the pillar.
  • the gap is thereby reduced.
  • the angle through which the guide anchor may rotate cannot be set in accordance with the occupant's physique.
  • the seat belt may fail to hold well a small occupant in emergency.
  • an inflator for example, must be used as drive mechanism to operate in emergency, the configuration is inevitably complicated.
  • the drive mechanism fails to operate in emergency, the occupant cannot be held, and the submarine phenomenon may not be controlled.
  • An object of this invention is to provide a seat belt device for the vehicle seat, which has a simple configuration and which can hold an occupant to the vehicle seat in emergency and control the submarine phenomenon, even if the occupant is small in physique.
  • the upper-front part of a seatback is cut, providing a hole at which the occupant's shoulder may lie, and an engaging means is fitted in the hole.
  • the engaging means holds the shoulder webbing, which is wrapped around the occupant.
  • a seat belt device for vehicle seats is comprised a webbing having a tongue and extending from a webbing feed port made in a pillar, when the tongue is inserted into a buckle provided on one side of a seat cushion, the upper half of the webbing used as a shoulder webbing is wrapped slantwise around the shoulder of the occupant sitting on the vehicle seat, and the lower half of the webbing used as a wrap webbing is wrapped around the hips of the occupant, thereby holding the occupant to the vehicle seat, wherein further comprising: a hole provided by cutting the seatback at an upper-front part and located at a position where the shoulder of the occupant lies; an engaging means fitted in the hole and able to engage with the shoulder webbing; and the shoulder webbing is engaged with the engaging means and then wrapped slantwise around the shoulder of the occupant.
  • the engaging means is fitted in the hole located at the occupant's shoulder, a gap is scarcely provided between the shoulder webbing and the occupant's shoulder and seatback.
  • the shoulder webbing can therefore be tightened in emergency, and can hold even an occupant of small physique to the vehicle seat, preventing the submarine phenomenon.
  • FIG. 1A is a schematic perspective view of a vehicle seat comprising a seat belt device according to one embodiment (Embodiment 1 ) of the present invention
  • FIG. 1B is a partly magnified view, showing part 1 B illustrated in FIG. 1A , and not showing the shoulder webbing for simplicity of drawing;
  • FIG. 1C is a partly sectional view of the part 1 B illustrated in FIG. 1A , taken along the front-rear direction;
  • FIG. 2A is a schematic perspective view of a vehicle seat comprising a seat belt device according to another embodiment (Embodiment 2 ) of the present invention, not showing the wrap webbing for simplicity of drawing;
  • FIG. 2B is a partly magnified view, showing part 2 B illustrated in FIG. 2A , and not showing the shoulder webbing for simplicity of drawing;
  • FIG. 2C is a partly sectional view of the part 2 B illustrated in FIG. 2A ;
  • FIGS. 3A to 3E are schematic diagrams of a striker and a shoulder webbing
  • FIG. 3F is a schematic diagram showing the striker and shoulder webbing equivalent to those shown in FIG. 3A , which are used in a modification of the invention.
  • FIGS. 4A and 4B are a partly rear perspective view and a partly schematic plan view, respectively, of a vehicle seat, illustrating a modification of this invention
  • FIG. 4C is a partly perspective view of a gate-shaped striker
  • FIG. 5A is a schematic front view of the locking means
  • FIGS. 5B to 5D are diagrams showing how the locking means performs latching
  • FIG. 6A is a schematic perspective view of a vehicle seat comprising a seat belt device according to other embodiment (Embodiment 3 ) of the present invention, not showing the wrap webbing for simplicity of drawing;
  • FIG. 6B is a partly magnified view, showing part 6 B illustrated in FIG. 6A , and not showing the shoulder webbing for simplicity of drawing;
  • FIG. 6C is a partly sectional schematic view of the part 6 B illustrated in FIG. 6A ;
  • FIG. 7 is a partly schematic plan view of a vehicle seat comprising a striker and a stay.
  • the vehicle seat 10 has two rear seats 12 (seats 12 L and 12 R) arranged side by side.
  • Each of the left and right seats 12 (seats 12 L and 12 R) comprises a seat cushion 14 and a seatback 16 .
  • the seatback 16 is coupled to the seat cushion 14 and can be folded forward to the seat cushion.
  • a headrest 17 is mounted on the top of the seatback 16 .
  • arrows Fr and Rr indicate the forward and backward directions of the vehicle seat 10
  • L and R indicate the leftward and rightward directions of the vehicle seat 10 .
  • the seat cushion 14 and the seatback 16 have basic structures well known in the art.
  • the seatback 16 for example, comprises a seatback frame and a seat pad 16 a.
  • the seatback frame is composed of left and right side frames and a connecting pipe connecting the upper ends of the left and right side frames, and is therefore shaped like letter U.
  • the right side frame 16 c is shown in FIG. 2B .
  • the seat pad 16 a made of foamed material such as urethane foam is mounted on the seatback frame and is covered with a trim cover 16 b having air permeability.
  • the seat cushion 14 comprises a seat cushion frame, a seat pad ( 16 a, shown in FIG.
  • the seat cushion frame is composed of left and right side frames and a connecting pipe connecting the front parts of the left and right side frames, and is therefore shaped like letter U.
  • the seat pad ( 16 a, shown in FIG. 1C .) is mounted on the seat cushion frame and is covered with the trim cover ( 16 b, shown in FIG. 1C .).
  • Either seat belt 18 is a three-point holding seat belt and comprises a webbing 18 c.
  • a retractor 18 a is provided in the chassis pillar 18 b.
  • the retractor 18 a has taken up the webbing 18 c with a traction force, and stores the webbing 18 c.
  • the distal end of the webbing 18 c extends from the retractor 18 a, passing through the webbing feed port 18 b ′ made in the pillar wall and located above the upper edge of the vehicle seat 10 .
  • first and second tongues 18 d 1 and 18 d 2 are mounted and can freely slide.
  • reference number 18 c indicates the shoulder webbing 18 c 1 , unless otherwise specified.
  • Buckles (first buckles) 18 e 1 are provided, respectively close to the center parts of the seat backs of the left and right rear seats 12 ( 12 L and 12 R). Each buckle 18 e 1 has, for example, one part embedded in the associated rear seat. The first tongues 18 d 1 is inserted in the first buckle 18 e 1 and engaged therewith.
  • the upper-front part 16 F of each seatback is cut, providing a hole 20 , which may be positioned at the tip of the occupant's shoulder.
  • the hole 20 is a bottomed hole, but is not limited the bottomed hole and a through hole may be used as the hole.
  • the shoulder webbing 18 c is set in engagement with an engaging means 30 provided in the hole 20 , and is wrapped slantwise around the occupant from the occupant's shoulder to the buckle 18 e 1 provided at one side of the seat cushion.
  • the engaging means 30 is another buckle (second buckle) 18 e 2 arranged in the hole 20 , and the second tongue (intermediate tongue) 18 d 2 mounted on the shoulder webbing 18 c is inserted into the second buckle and engaged therewith.
  • the seat pad (seatback member) 16 a made of, for example, foamed urethane, is covered with the trim cover 16 b.
  • the seat pad (seatback member) 16 a is cut, providing the hole 20 in the upper-front part of the seatback.
  • the hole 20 opens at front and has a cross section shaped like a rectangle.
  • the second buckle 18 e 2 is arranged and embedded in the hole 20 and has an engaging port 18 e 2 ′ extending in vertical direction and opening at front.
  • the second buckle 18 e 2 is spaced apart from the front 16 F of the seatback, and is arranged and embedded in the hole 20 (thus, in the seatback).
  • the shape and structure of the second buckle 18 e 2 are not limited to those specified above. Rather, the second buckle 18 e 2 may be embedded in the hole 20 , with the engaging port 18 e 2 ′ of the second buckle orientated slantwise and upward, so that it may easily catch the second tongue (intermediate tongue) 18 d 2 . Further, the second buckle 18 e 2 may not be embedded and immovably fitted in the hole 20 , scarcely leaving a gap, as shown in FIGS. 1B and 1C . Instead, the second buckle 18 e 2 may rotate in the hole, around a rotation axle (not shown) provided in the hole. When the second buckle 18 e 2 may rotate in the hole 20 around a rotation axle, its orientation can be freely adjusted. This makes it easy to insert the second tongue 18 d 2 into the engaging port 18 e 2 ′.
  • the first buckle 18 e 1 and the second buckle 18 e 2 provided in the hole 20 have, for example, the same shape. Nonetheless, each buckle may be changed in shape in accordance with, for example, the size of the seat
  • the shoulder webbing 18 c is wrapped around the occupant, with its widthwise direction aligned with the left-right direction.
  • the second buckle 18 e 2 is embedded in the hole 20 , and its engaging port 18 e 2 ′ extends in the vertical direction.
  • the shoulder webbing 18 c is therefore twisted as shown in FIG. 1C , and its widthwise direction is therefore changed from the left-right direction to the vertical direction.
  • the second tongue 18 d 2 is thereby inserted into the engaging port 18 e 2 ′. If the buckle 18 e 2 is embedded in the hole 20 so that the engaging port 18 e 2 ′ may extend in the left-right direction, however, the second tongue 18 d 2 can be inserted into the engaging port without twisting the shoulder webbing 18 c.
  • the occupant may pull the shoulder webbing 18 c after it has engaged with the engaging means 30 (i.e., buckle 18 e 2 ), and insert the first tongue 18 d 1 into the first buckle 18 e 1 .
  • the upper half 18 c 1 of the webbing as the shoulder webbing is thereby wrapped around the occupant, slantwise from the occupant's left shoulder.
  • the lower half 18 c 2 of the webbing as the wrap webbing is wrapped around the occupant's hips, holding the occupant to one seat of the vehicle seat 10 .
  • the shoulder webbing 18 c is wrapped around the occupant, after set into engagement with the engaging means 30 (i.e., buckle 18 e 2 ) which is held in the hole 20 made in the upper-front part 16 F and which is located at the occupant's shoulder. Since the shoulder webbing 18 c extends from the occupant's shoulder, a gap is scarcely provided between the occupant's shoulder and the shoulder webbing and front of the seat back. Therefore, the retractor 18 a can tighten the shoulder webbing 18 c in the case of emergency, immediately holding the occupant to the vehicle seat even if the occupant is small in physique. The seat belt can thus control the submarine phenomenon.
  • the engaging means 30 i.e., buckle 18 e 2
  • the engaging means 30 held in the hole is not used at all, and either the tongue 18 d 1 or the tongue 18 d 2 is set into engagement with the buckle 18 e 1 as in the seat belt device well known in the art. That is, if the occupant has ordinary physique, it suffices to wrap the shoulder webbing 18 c around the occupant, without setting the shoulder webbing 18 c into engagement with the engaging means 30 . In this case, too, the retractor 18 a can tighten the shoulder webbing 18 c in emergency, to hold the occupant to the vehicle seat in the same manner as usual. Needless to say, the engaging means, which is provided in the hole, would not contact, for example, the back of the occupant, not preventing the occupant from being well seated, even if the occupant has ordinary physique.
  • the second buckle 18 e 2 (engaging means 30 ) is embedded in the hole 20 made by cutting the upper-front part 16 F of the seatback, and the second tongue (intermediate tongue) 18 d 2 able to engage with the second buckle is provided on the shoulder webbing 18 c.
  • These configuration features can instantly hold the occupant to the vehicle seat in emergency, reducing the gap between the webbing and the occupant. It is therefore unnecessary to use any drive mechanism for moving the engaging means to an appropriate position in emergency, such as an electric drive mechanism or an inflator. This simplifies the structure of the seat belt device.
  • the second buckle 18 e 2 (engaging means 30 ) is embedded in the hole 20 and does not protrude from the front of the seatback.
  • the engaging means (second buckle) never contacts the back of the occupant, and would not prevent the occupant from being well seated.
  • the second buckle 18 e 2 remains well embedded in the hole 20 , the second tongue 18 d 2 will not protrude from the front of the seatback even if it is inserted in the engaging port 18 e 2 ′ of the second buckle.
  • the second tongue never contact the back of the occupant seated, and the occupant wrapped with the shoulder webbing 18 c is never prevented from being well seated.
  • Embodiment 2 shown in FIGS. 2A to 2C will be described.
  • the components identical to those of the embodiment described above (Embodiment 1) are designated by the same reference numbers, and will not be described.
  • the components distinguishing Embodiment 2 form Embodiment 1 will be described in the main.
  • Embodiment 2 differs from Embodiment 1 in that a striker is embedded in the hole 20 , not the buckle 18 e 2 as in Embodiment 1.
  • the striker 32 is shaped like a cantilever, and its inner end (close to the vertical centerline of the seat) is the free end.
  • the striker 32 shaped like a cantilever extends in the hole in the left-right direction from, for example, the outer side 20 S (pillar-side) of the hole.
  • the distal end (inner end) of the striker is a free end, and spaced from the inner side 20 S′ of the hole.
  • a part of the striker, for example the middle part 32 b, is bent twice, forming a stepped part.
  • the hole 20 is shown as a bottomed hole.
  • the hole 20 is not limited to a bottomed hole and a through hole may be used as the hole.
  • the shoulder webbing 18 c is bent back at the intermediate part, and is substantially U-shaped.
  • the part of the shoulder webbing, so bent back, is engaged with the striker 32 provided in the hole 20 .
  • the shoulder webbing is wrapped slantwise around the occupant's shoulder.
  • FIGS. 3A to 3E and FIG. 3F show a modification of Embodiment 2 .
  • the free end 32 a is pushed rearwards (see FIG. 3B ).
  • the part of the shoulder webbing 18 c bent back as describe above, is passed first through the gap between the free end 32 a and the inner side 20 S′ of the hole, is inserted, and guided through the striker 32 (see FIG. 3C ).
  • the bent-back part of the shoulder webbing 18 c may be inserted and engaged with the striker 32 as the engaging means 30 , and the shoulder webbing 18 c may then be wrapped slantwise around the occupant's shoulder. Then, a gap is scarcely provided between the shoulder webbing and the occupant's shoulder and seatback, in the same way as in Embodiment 1.
  • the shoulder webbing 18 c can therefore be tightened in emergency, holding the occupant to the vehicle seat even if the occupant is small in physique.
  • the seat belt can thus control the submarine phenomenon.
  • the striker 32 in the hole 20 and guide the bent-back part of the shoulder webbing 18 c through the striker. This helps to simplify the structure of the configuration of the seat belt device. Needless to say, the striker 32 , which is provided in the hole, would not prevent the occupant from being well seated, even if the occupant has ordinary physique. When the shoulder webbing is wrapped around the occupant's shoulder, without being engaged with the engaging means 30 (striker 32 ), the occupant can be held well to the vehicle seat and submarine phenomenon can be controlled. The striker 32 never prevents an occupant of ordinary physique, as well as an occupant of small physique, from being seated well in the vehicle seat.
  • the striker may be bent twice at middle part 32 b as shown in FIGS. 3A to 3F , to have a stepped part. Then, the striker can therefore catch the shoulder webbing 18 c at bent-back part more easily than otherwise, and can prevent the shoulder webbing from slipping sideways.
  • the free end 32 a of the striker may be bent as shown in FIG. 3F .
  • the striker can reliably prevent the shoulder webbing 18 c from slipping sideways and falling down from the free end of the striker.
  • the free end 32 a of the striker is bent backwards. Instead, the free end of the striker may be bent forwards and may guide the shoulder webbing 18 c. Further, the free end 32 a of the striker may not be bent forwards, the bent-back part of the shoulder webbing 18 c may be passed through the gap between the free end and the inner side 20 S′ of the hole, and may then be guided by the striker.
  • the striker 32 extends from the pillar-side 20 S of the hole in the left-right direction.
  • the fixed end 32 c of the striker may be secured to a locking means 40 (more precisely, bracket 49 described later) configured to lock the seatback in a standing position.
  • the locking means may be used as striker.
  • the fixed end 32 c of the striker may be secured to one side frame (i.e., the right side frame 16 c ) of the seatback frame.
  • the locking means 40 has such a known configuration as shown in FIGS. 3A to 5F appended to JP 2011-162163A that is a patent application filed by the applicant hereof.
  • the locking means 40 has, for example, a gate-shaped striker 42 and a latch 44 .
  • the latch 44 can rotate to come into engagement with the striker 42 .
  • the seatback 16 is fixed in the standing position.
  • the latch 44 of the locking means is provided at an upper part of one side of the seatback 16 .
  • the gate-shaped striker 42 is secured to the pillar 18 b opposing the latch 44 .
  • the gate-shaped striker 42 has two legs (front leg 42 F and rear leg 42 R), and is shaped like letter U.
  • the latch 44 of the locking means 40 is clamped between a base plate 46 and a cover plate 48 , forming a unit together with the plates 46 and 48 .
  • the unit has a bracket 49 formed integral.
  • the bracket is secured to the frame of the seatback 16 (i.e., seatback frame).
  • the latch 44 of the locking means is thereby attached to the upper part of one side of the seatback.
  • the fixed end 32 c of the striker is connected to the bracket 49 , and is secured thereto.
  • a shaft 44 S extends between the base plate 46 and the cover plate 48 .
  • the latch 44 is provided between the base plate and the cover plate and can rotate around the shaft 44 S.
  • a biasing means such as a torsion spring (not shown) is wound around, for example, the shaft 44 S, and applies a force F to the latch 44 , biasing the latch 44 to rotate clockwise around the shaft 44 S as indicate by an arrow shown in FIG. 5A .
  • the latch 44 is thereby set in at an initial position.
  • the gate-shaped striker 42 is secured to the pillar 18 b, with the front leg 42 F and rear leg 42 R positioned in the locus of a slit 45 located at the standing position of the seatback.
  • the latch of the locking means operates as the seatback assumes its standing position.
  • the operation of the latch will therefore be briefly explained.
  • the slit 45 of the locking means moves along a locus 45 ′ shown in FIG. 5B .
  • the front leg 42 F and rear leg 42 R of the gate-shaped striker are positioned.
  • the first face 44 a 1 of the latch 44 which extends across the slit, abuts on the front leg (see FIG. 5B ).
  • the first face 44 a 1 is a slope curved like an arc. Therefore, the latch 44 rotates against the bias force F, moving away from the front leg (as seen in the direction of the arrow shown in FIG. 5C ), as the front leg 42 F is guided, sliding on the first face.
  • the front leg 42 F moves from the first face 44 a 1 to the second face 44 a 2 of the latch 44 and abuts on the second face 44 a 2 .
  • the front leg 42 F then slides on the second face 44 a 2 that is a slope curved like an arc, similar to the first face 44 a 1 .
  • the latch 44 further rotates against the bias force F, moving away from the front leg.
  • the front leg 42 F moves over beyond the second face 44 a 2 , slipping into a storage space 44 c
  • the rear leg 42 R slides on the first face 44 a 1 , moves beyond the first face and is held in a locking groove 44 b (see FIG. 5D ).
  • the seatback 16 is held in its standing position.
  • the bracket 49 of the locking means 40 connects the fixed end 32 c of the striker to the latch 44 .
  • the striker 32 is therefore stably secured, by the locking means 40 (bracket 49 ), to the gate-shaped striker 42 and the pillar 18 b when the seatback 16 is rotated to its standing position.
  • an inertial force acts, via the striker 32 (engaging means 30 ), on the occupant wearing the shoulder webbing 18 c, to move the occupant forwards.
  • the inertial force is transmitted to the striker through the shoulder webbing.
  • the inertial force generated in emergency escapes to the locking means 40 via the bracket if the fixed end 32 c of the striker is connected and secured to the bracket 49 .
  • the gate-shaped striker 42 may be secured to the bracket 49 (latch 44 ) in any other manner.
  • the fixed end 32 c of the striker is secured to the pillar 18 b, and the gate-shaped striker 42 is secure to the bracket 49 (latch 44 ) provided on the upper part of one side of the seatback.
  • the gate-shaped striker 42 or latch 44 provided on the seatback may be connected to one side frame (i.e., the right side frame 16 c ) of the seatback frame. If connected to one side frame of the seatback frame, the striker 42 or latch 44 is stably fixed and can therefore transmit the inertial force generated in emergency to the side frame.
  • FIGS. 6A to 6C show Embodiment 3 of this invention.
  • the components identical to those of the embodiments described above are designated by the same reference numbers, and will not be described.
  • the components distinguishing Embodiment 3 from Embodiments 1 and 2 will be described in the main.
  • Embodiments 1 and 2 a hole is made by cutting an upper-front part of the seatback.
  • a hole is made by cutting through an upper-front part of the seatback.
  • the engaging means is the second buckle located in the hole (bottomed hole or through hole), and in Embodiment 2 the striker located in the hole (through hole or bottomed hole).
  • the engaging means is the striker arranged at the back of the hole (through hole). Embodiment 3 differs in these respects from Embodiments 1 and 2.
  • a hole (through hole) 120 is cut through the upper-front part 16 F of the seatback and may be positioned at the occupant's shoulder, and an engaging means 130 is spaced from the back of the seatback.
  • the hole 120 has a cross section shaped like a rectangle. The shape of the cross section is not limited, nonetheless, so long as the shoulder webbing can pass through the hole.
  • the engaging means 130 is a striker 132 shaped like a cantilever, and its inner end (i.e., inner side of the seat) is the free end. As seen from FIGS. 6A and 6B , the striker 132 has a fixed end 132 c on the surface of a pillar 18 b at the back of the hole 120 , and extends toward the seat from the pillar.
  • the free end 132 a of the striker is bent upwards, for example.
  • the shape of the free end 132 a is not limited to this, nonetheless. If so bent, however, the free end 132 a can prevent the shoulder webbing 18 c from slipping sideways on the striker 132 or falling from the free end 132 a.
  • the middle part of the striker 132 may be bent twice at its middle part to have a stepped part. In this case, too, the shoulder webbing 18 c can be prevented from slipping sideways or falling down.
  • the free end 132 a of the striker may be bent back as shown in FIG. 3F .
  • a support 16 a ′ may be provided on the back of the seatback, thereby to support the striker 132 as it is deformed (bent) toward the back of the seatback.
  • the support 16 a ′ is mounted on the back of the seatback and located in front of the free end 132 a of the striker and is made of, for example, elastic material and is semispherical in shape.
  • FIGS. 6A to 6C How the engaging means 130 (striker 132 ) shown in FIGS. 6A to 6C operates will be explained.
  • a part of the shoulder webbing 18 c is bent back at the intermediated part and is substantially U-shaped. The part so bent is guided from the free end 132 a of the striker through the hole 120 and is engaged with the striker 132 . So engaged by the engaging means 130 , the shoulder webbing 18 c is wrapped slantwise around the occupant, from the occupant's shoulder to the buckle 18 e 1 provided on one side of the seat cushion.
  • Embodiment 3 can achieve the same technical advantage as in Embodiments 1 and 2, i.e., to reduce the gap between the shoulder webbing 18 c and the occupant's shoulder. This is because the shoulder webbing 18 c is first engaged with the engaging means 130 (striker 132 ) and then wrapped slantwise around the occupant's shoulder. Hence, the shoulder webbing 18 c can be instantaneously tightened in emergency and control submarine phenomenon even if the occupant has small physique.
  • the shoulder webbing may be wrapped around the shoulder, without being engaged with the engaging means (striker 132 ). In this case, the shoulder webbing is tightened in emergency, holding the occupant well to the vehicle seat and hence preventing the submarine phenomenon.
  • the striker 132 never prevents an occupant of ordinary physique, as well as an occupant of small physique, from being seated well in the vehicle seat.
  • the striker 132 extends from the pillar 18 b (more precisely, from the surface thereof).
  • the inertial force acting on the occupant in emergency is therefore transmitted through the shoulder webbing 18 c to the striker. If the fixed end 132 c of the striker is secured to the pillar 18 b, the inertial force escapes to the pillar through the striker.
  • the striker 132 is spaced from the back of the seatback. If the back of the seatback has a horizontal hole communicating with the hole 120 and the striker 132 extends in the horizontal hole, the striker is embedded in the horizontal hole, not exposed at all. This prevents the vehicle seat from being degraded in outer appearance.
  • the seat belt device can hold even an occupant of small physique to the vehicle seat in emergency, thereby to control the submarine phenomenon, without using any additional components. If the occupant has ordinary physique, he or she only needs to wrap the shoulder webbing around him or her, without engaging the shoulder webbing with the engaging means. Needless to say, the seat belt device can hold the occupant of ordinary physique, too, to the vehicle seat in emergency, thereby to control the submarine phenomenon.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Transportation (AREA)
  • Textile Engineering (AREA)
  • Automotive Seat Belt Assembly (AREA)
  • Seats For Vehicles (AREA)
US14/728,148 2014-06-03 2015-06-02 Seat belt device for the vehicle seat Abandoned US20150343931A1 (en)

Priority Applications (1)

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US15/662,846 US10272808B2 (en) 2014-06-03 2017-07-28 Seat belt device for the vehicle seat

Applications Claiming Priority (2)

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JP2014114543A JP6308665B2 (ja) 2014-06-03 2014-06-03 車両用シートのシートベルト装置
JP2014-114543 2014-06-03

Related Child Applications (1)

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US15/662,846 Division US10272808B2 (en) 2014-06-03 2017-07-28 Seat belt device for the vehicle seat

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US20150343931A1 true US20150343931A1 (en) 2015-12-03

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US14/728,148 Abandoned US20150343931A1 (en) 2014-06-03 2015-06-02 Seat belt device for the vehicle seat
US15/662,846 Active US10272808B2 (en) 2014-06-03 2017-07-28 Seat belt device for the vehicle seat

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US (2) US20150343931A1 (enrdf_load_stackoverflow)
EP (1) EP2952396B1 (enrdf_load_stackoverflow)
JP (1) JP6308665B2 (enrdf_load_stackoverflow)

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US20180361975A1 (en) * 2015-12-15 2018-12-20 Kabushiki Kaisha Tokai-Rika-Denki-Seisakusho Seatbelt device
KR200489270Y1 (ko) * 2019-03-11 2019-05-27 심규원 어린이 안전 벨트
US20190176738A1 (en) * 2017-12-13 2019-06-13 Hyundai Motor Company Seatbelt airbag for vehicle
CN110497880A (zh) * 2018-05-16 2019-11-26 沃尔沃汽车公司 车辆座椅安全带装置
US10913421B2 (en) 2018-11-26 2021-02-09 Hyundai Motor Company Air bag apparatus for protecting passenger's head
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CN110497880A (zh) * 2018-05-16 2019-11-26 沃尔沃汽车公司 车辆座椅安全带装置
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US11097686B1 (en) 2020-04-02 2021-08-24 Volvo Car Corporation Apparatus and system for adjustable seatbelt guide

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US20170327019A1 (en) 2017-11-16
EP2952396A1 (en) 2015-12-09
US10272808B2 (en) 2019-04-30
EP2952396B1 (en) 2018-01-10
JP2015227149A (ja) 2015-12-17
JP6308665B2 (ja) 2018-04-11

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