CN101415585B

CN101415585B - Vehicle seat

Info

Publication number: CN101415585B
Application number: CN2007800117441A
Authority: CN
Inventors: 增谷英二
Original assignee: TS Tech Co Ltd
Current assignee: TS Tech Co Ltd
Priority date: 2006-02-06
Filing date: 2007-02-06
Publication date: 2011-08-24
Anticipated expiration: 2027-02-06
Also published as: CN101415585A; JP2007210351A; JP4290702B2

Abstract

A vehicle seat having a seat bottom, a seatback rotatably attached to the seat bottom, and a seatbelt. The seat bottom has a support frame attached to a vehicle body and also has a bottom cushion supported by the support frame. A pretensioner is provided between the bottom cusion and the support frame, and the pretensioner moves the bottom cushion rearward relative to the support frame when undesired external force occurs. When the pretensioner is activated, the bottom cushion moves rearward, and the distance (S) of movement of a tip anchor and a tongue anchor is greater than the distance (T) of movement of the bottom cushion.

Description

Vehicle seat

Technical field

When the present invention relates to undesirable external force that a kind of person of taking of making forwards sharply moves and acting on the car body, can effectively protect the person's of taking vehicle seat, particularly, the generation rapid answer of undesirable relatively external force, the vehicle seat that the bottom buffering pad is rearward moved.

Background technology

In the past, car body was subjected to undesirable external force and did the time spent, the technology record in patent documentation 1 that vehicle seat (containing the seat back of the body and the seat end) is rearward moved rapidly.

Patent documentation 1: 2001-No. 130354 communiques of TOHKEMY

Summary of the invention

Aforementioned technique known exists the seat back of the body of vehicle seat and the technical matters that seat end both sides will rearward move.For make the seat back of the body and the seat end the two rearward move, must fully guarantee the intensity of the structure that is moved, need bigger power in order to move, the bigger space that needs in order to move.For this reason, a lot of shortcomings are arranged on weight or size, in addition, technique known is difficult to be equipped in and is difficult to guarantee on the less car in space.

In addition, the unavailable space of vehicle seat must conduct in emergency circumstances be accepted in the space at vehicle seat rear, but is violating this restriction, and when the person of taking was sitting on the seat of rear portion, the back seat person of taking might be because in emergency circumstances rearward mobile vehicle seat be subjected to the secondary injury.

Therefore, the purpose of this invention is to provide a kind of modified form vehicle seat that overcomes above-mentioned technical matters.

For reaching this purpose, in the present invention,, car body does the time spent when being subjected to undesirable external force, and seat is unable to bear it on the back, and the bottom buffering pad is rearward moved, and simultaneously, by improving the tensioning state of safety strap, can protect the person of taking more reliably.

Description of drawings

Fig. 1 is for illustrating vehicle seat single-piece transparent view of the present invention.

Fig. 2 is the decomposition diagram of aforementioned vehicle seat.

Fig. 3 is the section-drawing at the bottom of the aforementioned vehicle seat seat.

Fig. 4 illustrates the vehicle seat of common state and the person's of taking lateral plan.

Fig. 5 is the lateral plan that preceding bottom buffering pad of conflict and support relation are shown.

Fig. 6 illustrates the bottom buffering pad after the conflict and the lateral plan of support relation.

Fig. 7 is the instruction diagram that the miles of relative movement S of the miles of relative movement T of bottom buffering pad and inclination fixer is shown.

Fig. 8 is the decomposition diagram of the vehicle seat of the 2nd embodiment according to the present invention.

Fig. 9 is the section-drawing at the seat end of aforementioned vehicle seat.

Figure 10 is the lateral plan that preceding bottom buffering pad of conflict and support relation are shown.

Figure 11 illustrates the bottom buffering pad after the conflict and the lateral plan of support relation.

Figure 12 is the decomposition diagram of the vehicle seat of the 3rd embodiment according to the present invention.

Figure 13 illustrates the seat belt pretensioner of the 3rd embodiment and the lateral plan of inclination fixer (tip anchor).

Figure 14 is the amplification profile of aforementioned seat belt pretensioner.

Figure 15 is the transparent view of the monodirectional locking of aforementioned seat belt pretensioner.

The specific embodiment

Embodiments of the invention are described with reference to the accompanying drawings, at the bottom of vehicle seat 1 of the present invention has 3, by axle on 73 fixing present ends 3 the seat back of the body 2 and the headrest 4 on the present back of the body 2 tops is set.The seat back of the body 2 remains on the relative seat end 3 arbitrarily angled by adjustable mechanism 50.The seat end 3, have support 10 and bottom buffering pad 15, and support 10 is installed on the car body 7 (Fig. 2) by known slide mechanism 5.

Aforementioned brackets 10 has a pair of stringer board 11, and is arranged on the connecting portion 12 between the stringer board 11,11.Aforementioned bottom buffering pad 15 is disposed in fact between the stringer board 11,11.In the 1st embodiment of Fig. 1-shown in Figure 7, front side pitman arm 20 can be installed in freely to rotate by axle 21 on the front side of stringer board 11 of support 10, and the front side of bottom buffering pad 15 is being installed in by axle 22 on the front end of front side pitman arm 20.

The rear side pitman arm 16 of triangle can be installed in freely to rotate by axle 17 on the rear side of stringer board 11 of aforementioned brackets 10, and the rear portion of aforementioned bottom buffering pad 15 can be installed on the rear side pitman arm 16 freely to rotate by adapter shaft 18.

Aforementioned bottom buffering pad 15 has shock bracket 23 as shown in Figure 3, is installed in the padded coaming 24 on the shock bracket 23 and surrounds the overcoat 25 of padded coaming 24 peripheries.

Below aforementioned bottom buffering pad 15, be provided with the pretensioner 30 that bottom buffering pad 15 is rearward relatively moved with respect to car body 7 (support 10 or the seat back of the body 2).Pretensioner 30 has cylinder 32, the gas generator 33 of a large amount of gases, release piston 31 in piston 31 and the supply cylinder 32.At the front end of piston 31, connect piston rod 34 by connecting pin etc. as required.The bottom of cylinder 32 is installed on the connecting portion 12 (or bottom buffering pad 15) of support 10, and the front end of piston 31 is installed on the bottom buffering pad 15 (or support 10).During from cylinder 32 release pistons 31, bottom buffering pad 15 rearward relatively moves with respect to car body 7.

When the bump detecting sensor 6 of desired position detected bump (undesirable external force that the person of taking is forwards sharply moved) on being arranged at car body 7, aforementioned gas generator 33 produced a large amount of gases in moment, and piston 31 is rearward moved from cylinder 32.

When the bump detecting sensor 6 of desired position detected bump (undesirable external force that the person of taking is forwards sharply moved) on being arranged at car body 7, aforementioned gas generator 33 produced a large amount of gases in moment, and piston 31 is rearward moved from cylinder 32.Gas generator 33 action in a single day, bottom buffering pad 15 just moves to the position of Fig. 6 from the position of Fig. 5, and the front side of bottom buffering pad 15 simultaneously moves up, and one side rearward moves, and it is rearward mobile that the rear side of bottom buffering pad 15 simultaneously moves down one side.To the detailed action of bottom buffering pad 15 with aftermentioned.

Aforementioned vehicle seat 1 has safety strap mechanism 39.Safety strap mechanism 39 has belt traction device 47, safety strap 40, the pars intermedia of safety strap 40 is remained on neat Shoulder belt fixer 46 on the specified altitude, be connected the tongue piece 45 on safety strap 40 intermediate ranges, freely adorn the tongue piece fixer 43 that engages with tongue piece 45 with taking off and be fixed on inclination fixer 41 on safety strap 40 front ends.During because of the strong load of effect on safety strap 40 such as accident, the pulling out of belt traction device 47 restriction safety strap 40.Belt traction device 47 is fixed on the car body 7 or the seat back of the body 2.Inclination fixer 41 and tongue piece fixer 43 are installed in respectively on the aforementioned rear

side pitman arm

16,16 by axle 42,42.

Axle

42,42 can be substituted by

adapter shaft

18,18.

Be formed with on the

aforementioned stringer board

11,11 with

aforementioned axis

17,17 is the circular-

arc guide groove

49,49 at center.49,49 pairs of guide grooves are fixed on the axis of

guide

48,48 channeling conducts on the rear

side pitman arm

16,16.

As previously mentioned, gas generator 33 action in a single day, just as shown in Figure 7, the rear side of bottom buffering pad 15 simultaneously moves down one side and rearward moves.This is carried out supplemental instruction.Gas generator 33 is in case action, and being fixed on adapter shaft 18 on the bottom buffering pad 15, to make rear side pitman arm 16 be that the center cw turns round with axle 17, and its result only makes only miles of relative movement S of adapter shaft 18 (being equal to inclination fixer 41 and tongue piece fixer 43).Thus, promptly, under the unusual situation safety strap 40 only tensioning apart from S.That is to say that situations such as accident can make safety strap 40 than common tensioning in moment after taking place; thus; the binding function of safety strap mechanism 39 is higher than usually, can expects to protect the person of taking effectively, suppress between the winding 40A of the person of taking and safety strap 40, to produce undesirable space.

In addition, during gas generator 33 actions, the front side of bottom buffering pad 15 moves up.Thus, can further suppress the person of taking forwards moves.

The rear amount of movement of aforementioned bottom buffering pad 15 and equating of approximate horizontal apart from T.At this, longer than distance T as afore-mentioned distance S is set for, then when rearward mobile, the person of taking has been subjected to than constrained force protection stronger before the accident by safety strap mechanism 39 bottom buffering pad 15 under the effect of pretensioner 30.Longer in order to set for than distance T apart from S, can be designed so that suitable apart from T with leg-of-mutton minor face, suitable apart from S with leg-of-mutton long limit.

Fig. 8～Figure 11 shows the 2nd embodiment of the present invention, is provided with installation shaft 55 at the rear portion of bottom buffering pad 15, during installation shaft 55 can be inserted rear side slotted hole 56 on the stringer board 11 that is arranged on support 10 along front and back with moving freely.Inclination fixer 41 and tongue piece fixer 43 cards end on an end of metal cords 57, and the pars intermedia of metal cords 57 contacts with roller 58 on being arranged on aforementioned installation shaft 55 peripheries.The other end of metal cords 57 ends on stringer board 11 by pin 59 cards.

Aforementioned bottom buffering pad 15 is under the effect of pretensioner 30 when rearward mobile, installation shaft 55 (roller 58) also rearward moves simultaneously, thus, inclination fixer 41 and tongue piece fixer 43 only are drawn out the roughly two-fold distance of the rear amount of movement of installation shaft 55, safety strap 40 is by tensioning effectively, and the person of taking is retrained more reliably by safety strap 40.

Figure 12～Figure 15 illustrates the 3rd embodiment of the present invention, inclination fixer 41 and tongue piece fixer 43 cards end the end in metal cords 57, the pars intermedia of metal cords 57 contacts with roller 58 on being arranged on aforementioned installation shaft 55, and the other end of metal cords 57 is connected with seat belt pretensioner 60.

Aforementioned pretensioner 60 has cylinder 63, piston 61 and piston rod 62, and metal cords 57 is connected with piston rod 62.In cylinder 63, form gas compartment 64, by in gas compartment 64, supplying with volume gas by gas generator 65 from the signalizing activity of bump detecting sensor 6.In a single day gas supply in the gas compartment 64, and inclination fixer 41 and tongue piece fixer 43 are stretched via metal cords 57, and safety strap 40 becomes strong slack-free state, and the person of taking is retrained more reliably by safety strap 40.So, in the 3rd embodiment, it is characterized by, have and be different from the special-purpose pretensioner 60 that makes the pretensioner 30 that bottom buffering pad 15 rearward moves, this special use pretensioner 60 stretches inclination fixer 41 and tongue piece fixer 43 and makes safety strap 40 tensionings.

Aforementioned piston 61 has unidirectional lock 67.Unidirectional lock 67 has a plurality of claw-like projections 68, by engaging of claw-like projection 68 and cylinder 63 inwalls, limited piston 61 do not cross assigned position and not the left in Figure 13 move.On the periphery of piston 61, be provided with seal ring 72.

As above-mentioned, in the present invention, owing to detect undesirable external force that the person of taking that sends as an envoy to forwards sharply moves in case clash into detecting sensor 6; bottom buffering pad 15 just rearward moves; simultaneously, the tensioning state of safety strap 40 uprises, and therefore can expect to protect more reliably the person of taking.

In addition, in the present invention, the seat back of the body 2 because of can not mobile in fact vehicle seat 1 only makes bottom buffering pad 15 rearward move, and therefore, also can adopt the vehicle seat that possesses the good function of the present invention even can not guarantee at the rear of vehicle seat 1 on the vehicle of bigger mobile space.In other words, in the present invention, can produce unavailable space hardly at the rear of vehicle seat 1.

Claims

1. a vehicle seat is characterized by, and at the bottom of having, is installed in the seat back of the body of described seat at the end freely to rotate, and safety strap; Described seat has the support that is installed on the car body end and by the bottom buffering pad of bracket supports; Described support constitutes not because of the effect that makes undesirable external force that the person of taking forwards sharply moves and moves forwards, backwards relative to described car body; Described bottom buffering pad constitutes and can move up in front and back by described relatively support; Between described bottom buffering pad and described support, be provided with pretensioner, when described undesirable external force has taken place, described bottom buffering pad rearward moved relative to described support; The inclination fixer and the tongue piece fixer of described safety strap constitute, and when described pretensioner moved, the rear of the inclination fixer of described safety strap and tongue piece fixer and described bottom buffering pad was moved together and moved, and increases the tensioning of described safety strap; Will be when the action of described pretensioner, the miles of relative movement S of described inclination fixer and described tongue piece fixer sets for bigger than the miles of relative movement T of described bottom buffering pad.

2. according to the described vehicle seat of claim 1, it is characterized by, to described support, described rear side pitman arm is connected with the rear portion of described bottom buffering pad, moves by the rear of described bottom buffering pad with rear side pitman arm bearing fixing, described rear side pitman arm revolution; Described inclination fixer and described tongue piece fixer are fixed on the described rear side pitman arm, and when described rear side pitman arm turned round, the tensioning of described safety strap increased.

3. according to the described vehicle seat of claim 1, it is characterized by, described inclination fixer and described tongue piece fixer are connected with described support via metal cords, on described bottom buffering pad, be provided with the roller that contacts with described metal cords, when described bottom buffering pad because of the action of described pretensioner when rearward mobile, described roller contacts with described metal cords, makes described inclination fixer and described tongue piece fixer make the distance that only moves on the direction of described belt tensioning than the rear miles of relative movement length of described bottom buffering pad.

4. according to the described vehicle seat of claim 1, it is characterized by, described inclination fixer and described tongue piece fixer are connected with seat belt pretensioner via metal cords, when described undesirable external force has taken place, described bottom buffering pad rearward moves by described pretensioner, and described inclination fixer and described tongue piece fixer move making on the direction of described belt tensioning by described seat belt pretensioner.