CN101823450B - Active material head restriction component, method for locking and spreading the component - Google Patents
Active material head restriction component, method for locking and spreading the component Download PDFInfo
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- CN101823450B CN101823450B CN200810087064.4A CN200810087064A CN101823450B CN 101823450 B CN101823450 B CN 101823450B CN 200810087064 A CN200810087064 A CN 200810087064A CN 101823450 B CN101823450 B CN 101823450B
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- active material
- component
- material component
- activation signal
- head restraint
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- 239000011149 active material Substances 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims description 9
- 230000004913 activation Effects 0.000 claims description 18
- 230000008859 change Effects 0.000 claims description 6
- 230000005291 magnetic effect Effects 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 3
- 229920000431 shape-memory polymer Polymers 0.000 claims description 3
- 229910001285 shape-memory alloy Inorganic materials 0.000 claims description 2
- 238000001994 activation Methods 0.000 claims 15
- 239000000126 substance Substances 0.000 claims 2
- 229920001971 elastomer Polymers 0.000 claims 1
- 239000000806 elastomer Substances 0.000 claims 1
- 230000005294 ferromagnetic effect Effects 0.000 claims 1
- 230000004044 response Effects 0.000 claims 1
- 238000000518 rheometry Methods 0.000 claims 1
- 238000007725 thermal activation Methods 0.000 claims 1
- 230000008602 contraction Effects 0.000 abstract 2
- 239000012781 shape memory material Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
- 230000007246 mechanism Effects 0.000 description 5
- 239000004033 plastic Substances 0.000 description 5
- 229920003023 plastic Polymers 0.000 description 5
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 230000003993 interaction Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229910001566 austenite Inorganic materials 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229910000734 martensite Inorganic materials 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 229920002595 Dielectric elastomer Polymers 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 229920000831 ionic polymer Polymers 0.000 description 1
- 239000002085 irritant Substances 0.000 description 1
- 231100000021 irritant Toxicity 0.000 description 1
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- 239000002905 metal composite material Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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- Seats For Vehicles (AREA)
Abstract
The invention provides a head restriction component which can selectively move between a contraction position and a stretching position. The head restriction component comprises a support component and a stretchable component; a jointing component is rotatably installed relative to the support component and the stretchable component; a shaft is connected to the jointing component so as to rotate along with the jointing component; an active material component is used for rotating the shaft in an actuating way so that the stretchable component can move to the stretching position from the contraction position.
Description
The cross reference of related application
This application claims the U.S. Provisional Patent Application No.60/911 submitted on April 12nd, 2007, the benefited power of 314, the full content of above-mentioned patent application this with see mode be incorporated herein.
Technical field
The present invention relates to the head limiting unit in power actuated vehicle, and relate more specifically to locking and the expansion of the head limiting unit adopting active material (active material).
Background technology
Head restraint assembly is usually used in vehicle, and is usually adjustably attached to back of seat.Head limiting unit is aimed at after the head of seated occupant, to provide comfortable in vehicle operation, supports and protection.The liner part of head limiting unit is suitable for providing support and protecting, and is usually located by terminal user.
The passenger of vehicle is positioned at different angles in order to comfortable its back of seat that usually makes.Such as, Vehicular occupant is usually sat more straight in having in the vehicle of higher seating height of such as lorry and SUV (sport utility vehicle), and the passenger in passenger vehicle is usually in the position more tilted.The change of seat back positions attached head limiting unit can be made to move and further from or closer to the head of seated occupant.That is, the space between head of passenger and head limiting unit can be affected due to the position of back of seat and change.
Summary of the invention
In some cases, wish that head limiting unit is near to or in contact with after the head of passenger.In vehicle use procedure, wish by head restraint assembly from based on comfortable and select position adjustments to the position based on support passengers.
There is provided a kind of head restraint assembly, it comprises: load-carrying element, and between punctured position and expanded position optionally moveable deployable component.Deployable component compares at punctured position further from load-carrying element at expanded position.Joint piece is rotatably mounted relative to load-carrying element and is rotatably mounted relative to deployable component.Head restraint assembly comprises axle further, and this axle is installed to joint piece to rotate with it.Active material component has the first end and the second end installed relative to load-carrying element.The centre portion of active material component engages the antelabium on described axle, and make active material component have the feature of curved shape, wherein said end is in the opposite side of antelabium.Active material component is activatable to rotate described axle, thus makes deployable component shift to its expanded position from its punctured position.
Alternative head restraint assembly uses with bar slide joint to carry out the clutch pack of translation.Second joint piece is rotatably mounted relative to deployable component and clutch pack.Deployable component is shifted to its expanded position from its punctured position and is caused the second joint piece to rotate, thus makes clutch pack along described bar translation.Second joint piece and bar define the frame support for described component, and this structure has the load capacity of more stable structure and Geng Gao when object contacts with cushion member.
According to the detailed description of carrying out for enforcement best mode of the present invention below in conjunction with accompanying drawing, above-mentioned feature and advantage of the present invention and other feature and advantage will become apparent.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the passenger compartment of the seat-assembly with headed limiter assembly;
Fig. 2 is the schematic rear view of head restraint assembly shown in Fig. 1 at restriction site;
Fig. 2 A is the schematic side elevation of the head restraint assembly in Fig. 1 and 2 at restriction site;
Fig. 3 is that head restraint assembly shown in Fig. 1-2 A is in the schematic rear view of expanded position;
Fig. 3 A is the schematic side elevation of head restraint assembly shown in Fig. 1-3 at expanded position;
Fig. 4 is at the schematic side elevation of restriction site for another embodiment of the head restraint assembly of seat-assembly shown in Fig. 1;
Fig. 5 is the schematic side elevation of head restraint assembly shown in Fig. 4 at part expanded position;
Fig. 6 is the schematic side elevation of head restraint assembly shown in Figure 4 and 5 at complete expanded position;
Fig. 7 is for the schematic diagram of the clutch pack in head restraint assembly shown in Fig. 4-6 in calibration position;
Fig. 8 is clutch pack shown in Fig. 7 at the schematic diagram of the upwards driven second place;
Fig. 9 is the schematic diagram of clutch pack shown in Fig. 7 and 8 in locking the 3rd position;
Figure 10 is the schematic diagram of clutch pack shown in Fig. 7-9 in the 4th position unlocked;
Figure 11 is clutch pack shown in Fig. 7-10 at the schematic diagram of driven 5th position downwards;
Figure 12 is in restriction and the schematic rear view of latched position for another embodiment of the head restraint assembly of seat-assembly shown in Fig. 1;
Figure 13 is head restraint assembly shown in Figure 12 in the schematic rear view of restriction and unlocked position;
Figure 14 is head restraint assembly shown in Figure 12 and 13 in the schematic rear view of restriction and unlocked position; With
Figure 15 is the schematic rear view of head restraint assembly shown in Figure 12-14 at expanded position.
Detailed description of the invention
See accompanying drawing, wherein, identical Reference numeral refers to identical parts.Fig. 1 schematically illustrates the seat-assembly 10 of the base plate 14 being installed to car body 18.Car body 18 defines the passenger compartment 22 being wherein provided with seat-assembly 10.Seat-assembly 10 comprises seat lower part 26, seatback portion 30 and head restraint assembly 34.Seat lower part 26 is defined for the surface 38 of the general horizontal direction of support passengers (not shown).Seatback portion 30 is installed relative to seat lower part 26, and is defined for the surface 42 at support passengers back.Seatback portion 30 can be installed relative to seat lower part 26 rigidity, or can be rotatably mounted relative to seat lower part and its angle of inclination optionally can be changed by passenger.
Head restraint assembly 34 is installed to the upper end of seatback portion 30.Head restraint assembly 34 is illustrated as the component being located away from seatback portion, but, it should be noted that in the scope of the claims in the present invention, it will be understood by those skilled in the art that head restraint assembly can be the integrated component of seatback portion.Such as, head limiting unit can be the upper part of back of seat.The surface 46 that head restraint assembly 34 limits and surface 42 are towards roughly the same direction.
See Fig. 2 and 2A, head restraint assembly 34 comprises relative to seatback portion (being shown as 30 in FIG) installation and is such as the load-carrying element of plate 54, and comprises the cushion member 58 defining surface 46.Cushion member 58 is effectively connected to plate 54 by actuator 62, and actuator 62 is arranged to cushion member 58 is optionally moved relative to plate 54.Actuator 62 comprises four the frame 66A-D being installed to plate 54, and is installed to four frame 70A-D of cushion member 58.Plate 54 and cushion member 58 are interconnected by four joint piece 74A-D effectively.It should be noted, cushion member 58 is exemplary, the surface 46 (as shown in fig. 1) of component 58 optionally moving-head limiter assembly 34, and can have other structures in the scope of the claims in the present invention.Surface 46 is formed by the elastic membrane being effectively connected to component 58 grade.
More specifically, joint piece 74A is rotatably connected to frame 66A in its one end, and to rotate around axis A1 relative to plate 54, and joint piece 74A is rotatably connected to frame 70A at its other end, to rotate around axis A2 relative to cushion member 58; Joint piece 74B is rotatably connected to frame 66B in its one end, and to rotate around axis A1 relative to plate 54, and joint piece 74B is rotatably connected to frame 70B at its other end, to rotate around axis A2 relative to cushion member 58; Joint piece 74C is rotatably connected to frame 66C in its one end, to rotate around axis A3 relative to plate 54, and is rotatably connected to frame 70C at its other end, to rotate around axis A4 relative to cushion member 58; Joint piece 74D is rotatably connected to frame 66D in its one end, to rotate around axis A3 relative to plate 54, and is rotatably connected to frame 70D at its other end, to rotate around axis A4 relative to cushion member 58.Axis A1, A2, A3, A4 are parallel.
Cushion member 58 is illustrated as relative to plate 54 and is in primary importance in Fig. 2 and 2A, i.e. punctured position.When cushion member 58 is in primary importance, joint piece 74A-D, for be roughly vertically oriented, makes frame 70A-D adjacent plate 54.
Actuator 62 comprises axle 90 further, and axle 90 is installed to joint piece 74A, 74B to rotate around axis A1 with it.Axle 90 is roughly cylindricality, it is characterized in that, has from its radial outstanding antelabium 94.Actuator 62 also comprises marmem (SMA) line 98, and the feature of line 98 is, it has first end 102 and the second end 106.First end 102 is installed to plate 54 with the second end 106 and is in its relative both sides.The middle section contacts antelabium 94 of SMA line 98.Antelabium 94 higher than the installation site of end 102,106, thus makes SMA line 98 have " curved string " shape facility, as shown in the figure.
The feature of marmem is, alloy is when temperature is lower than its martensite finish temperature M
ftime there is cold conditions.The feature of marmem is also, alloy is when temperature is higher than its austenite finish temperature A
ftime have hot.The feature of the object formed by described alloy is, can have reservation shape.When described object is at cold conditions false plastic deformation, by by this heating objects to higher than its austenite finish temperature A
fand strain is reversed, that is, by this heating objects to higher than its A
fthis object will be caused owing to recovering its reservation shape from martensite to austenic material phase transformation.The modulus of elasticity of SMA and yield strength compare when hot also significantly lower in cold conditions.It will be understood by those skilled in the art that pseudoplasticity strains the reason being similar to plastic strain and is, this strain keeps existence, unless the stress causing this to strain is eliminated.But, be different from plastic strain, when described object be heated to its hot time, pseudoplasticity strain reversible.
The feature of SMA line 98 is, has predetermined length (shape), and is arranged to, and when cushion member 58 is in its primary importance as illustrated in figures 2 and 2, SMA line 98 has stretcher-strain feature.Active device 99 is connected to line 98 so that activation signal is put on line 98.When line 98 is heated to hot, the length of line 98 reduces and puts on antelabium 94 by enough power, thus axle 90 and joint piece 74A, 74B is rotated, as shown in Fig. 3 and 3A around axis A1.See Fig. 3 and 3A, when joint piece 74A, 74B rotate around axis A1, they cause cushion member 58 to move away from plate 54.Cushion member 58 moves due to the rotation of joint piece 74A, 74B, and thus causes joint piece 74C, 74D to rotate.When SMA line 98 has its predetermined length, cushion member 58 is in the second place relative to plate 54, i.e. expanded position, and as shown in figs. 3 and 3a, in this second place, cushion member 58 extends forward and compares when primary importance closer to passenger in car body.
The curved beam string structure of SMA line 98 causes and uses less line than the structure of other SMA lines, and causes cushion member 58 to be deployed into its second place quickly from its primary importance.By curved beam string structure, the two ends of SMA line are fixed, therefore, clearance line electric current being fed to SMA line only needs mobile the movement being enough to be adapted to end 102,106, wherein, the movement of end 102,106 may be derived from the object (if that is, described end is installed to plate 54 by the energy absorber of such as spring) existing in expansion process and hinder component 58 movement.The situation that also may exist is, SMA line can not launch head restraint assembly with enough power/speed.In this case, the balance spring of soft can be attached to multiple positions of described mechanism, thus makes its weight offsetting cushion member 58 and the weight of other mechanisms of movement in expansion process/head limiting unit parts.These balance springs can adopt following form, namely, be connected to the extension spring of (such as between joint piece 74A and 74C) between clutch arm, support portion is connected to the extension spring of front surface (such as between 54 and 70C), support portion is connected to the extension spring of clutch arm (such as between 54 and 74C), or the torsion spring at one of the clutch/power-transfer clutch pivoted position being positioned at support portion place's (such as between component 66A and joint piece 74A).
See Fig. 4, schematically illustrate alternative head restraint assembly 34A.Head restraint assembly 34A uses four thick sticks parallel clutch system (arranging at each side mirror picture of head limiting unit) with by component 58 from the primary importance relative to plate 54 (namely, punctured position as shown in Figure 4) shift to the second place (that is, as shown in Figure 6 expanded position) relative to plate 54.
Frame 66A, 66C are installed to plate 54, and frame 70A, 70C are installed to cushion member 58.Joint piece 74A is rotatably connected to frame 66A in its one end, and to rotate relative to plate 54, and joint piece 74A is rotatably connected to frame 70A at its other end, to rotate relative to cushion member 58; Joint piece 74C is rotatably connected to frame 66C in its one end, and to rotate relative to plate 54, and joint piece 74C is rotatably connected to frame 70C at its other end, to rotate relative to cushion member 58.
Bar 110 is installed to plate 54 by frame 114.Joint piece 116 is rotatably connected to frame 70A in its one end, and is rotatably connected to clutch pack 120 at its other end.Clutch pack 120 and bar 110 slide joint, make the movement of clutch pack 120 substantially be restricted to along bar 110 translation.Axle 90 is installed to joint piece 74A to rotate with it.Axle 90 comprises antelabium 94.Antelabium 94 is effectively connected with plate 54 in the mode identical with as shown in Fig. 2-3A by SMA line (not shown in figs. 4-6).When SMA line be heated to its hot time, it causes axle 90 to rotate, and thus this cause joint piece 74A to rotate and make component 58 move away from plate 54.Component 58 is shown as in Figure 5 and mediates relative to plate 54, and is shown as in figure 6 and is in its second place relative to plate 54.See Fig. 5 and 6, the movement of component 58 causes joint piece 116 by clutch pack along bar 110 upwards translation, make joint piece 116 and joint piece 74A define A-Frame support portion for component 58, this structure has the load capacity of more stable structure and Geng Gao when object contacts with outside face 46.
Clutch pack 120 is free-wheel clutch, and it allows clutch pack 120 to move up along bar 110, and stops clutch pack 120 to move down along bar 110.Therefore, clutch pack 120 stops component 58 to shift to its primary importance as shown in Figure 4 from its second place as shown in Figure 6.
See Fig. 7-11, clutch pack 120 comprises the plate 130 wherein forming porose (not shown).Plate 130 is pivotably connected to component 132.Bar 110 extends through the hole in plate 130, and plate 130 is installed to be the angle being in and being kept by spring 134.Hole in hang plate 130 allows assembly 120 to be upwards free to slide along bar 110, as shown in Figure 8.When assembly 120 is along when in downward direction loading, as shown in Figure 9, contribute to making plate 130 raise further and rotate by the spring 34 be frictionally connected on bar 110, lock on the stem 110 with making plate 130 form fit, thus confinement plate 130 and any of assembly 120 move downward.By swivel mount 130, such as, by power F being put on plate 130 (as shown in Figure 10), clutch pack 120 can get back to its initial position, thus allows plate 130 and assembly 120 to return along bar 110 slide downward, as shown in figure 11.
See Figure 12, wherein identical Reference numeral refers to the parts identical with Fig. 1-11, and alternative head limiting unit actuating assembly 34B is illustrated schematically.SMA line is installed to thick stick 200 at its end 102,106, and engages with the antelabium 94 of axle 90 in " curved string " mode.Pin 204A, 204B are installed to thick stick 200, and each pin 204A, 204B are all connected to corresponding spring 208A, 208B, and spring 208A, 208B pull thick stick 200 near stopper element 210A, 210B.Spring 208A, 208B are installed to the opposite end of plate 54 shown in Fig. 1.Each pin 204A, 204B slide through the respective aperture (not shown) be formed in respective members 214A, 214B.Component 214A, 214B have a certain degree relative to pin 204A, 204B, thus allow thick stick 200 upward movement but stop thick stick 200 to move downward.The interaction between plate 130 and bar 110 is similar at component 214A, 214B and the interaction between pin 204A, 204B.
When SMA line 98 activates, be namely heated to its hot time, SMA line 98 impels axle 90 to rotate, and as shown in Figure 13, thus makes cushion member (being shown as 58 in fig. 2) shift to its second place from its primary importance.See Figure 13 and 14, if there is an object hinder cushion member and stop it to shift to the second place from primary importance, then the power of SMA line 98 when being heated to it and being hot makes spring 208A, 208B extend, thus thick stick 200 is moved up, as shown in Figure 15.So prevention thick stick 200 is returned downwards, until component 214A, 214B move.Therefore, spring 208A, 208B provides strain relief.If described strain relief mechanism is engaged during head limiting unit is launched, then can be reset to its initial configuration, described mechanism can be launched in the time subsequently.Described strain relief mechanism resets and mechanical interaction can be used automatically to realize, such as, component 214A, 214B is forced to its " unblock " position (disengaged position) (being similar to Figure 10) by the protruding member being rigidly attached to S. A. 90.Retaining member 214A, 214B unlock when being in punctured position by these protrusions.When protrusion outwards and upwards (enters the page) and rotates, it by the position of no longer limiting member 214A, 214B, thus allows the one-way operation of described strain relief device.If described axle and protrusion rotate to its initial orientation, then protrusion is incited somebody to action again contact member 214A, 214B and makes it unlock.Once unlock, then thick stick 200 by free shortening, thus pulls downwards and gets back to its initial position near retainer 210A, 210B by spring 208A, 208B of extending.
Adopt marmem line in embodiments herein.But, in the scope of claim of the present invention, also other active materials can be adopted.Such as, other shape-memory materials can be adopted.Shape-memory material is a class active material, sometimes also referred to as intellectual material, refer to the material or compound with following characteristics: its original shape can be remembered, and recover its original shape by applying external irritant (i.e. activation signal) thus.Therefore, shape-memory material can be transitory state from the distortion of its original shape.
Exemplary shape-memory material comprises: marmem (SMA), the electro activation poly-mer (EAP) of such as dielectric elastomer, ionic polymer metal composite material (IPMC), piezopolymer and shape-memory polymer (SMP), magnetic shape memory alloy (MSMA), shape memory ceramics (SMC), pressure becomes plastics (baroplastics), piezoceramic, magnetorheological (MR) elastic body, the composite material of above-mentioned shape-memory material and non-shape-memory material, with the combination comprising the above-mentioned shape-memory material of at least one.EAP, piezoceramic, pressure become plastics and analogue uses by the mode similar with marmem described herein, and according to this disclosure, this is cognoscible to those skilled in the art.
In this disclosure, most of embodiment comprises shape memory line; But, in the scope of the claims in the present invention, shape-memory material and other active materials are used by other forms various, described form is such as: band, sheet, plate, foams, honeycomb ceramics and lattice battle array structure, spiral or sleeve, braided cable, manage or comprise the combination of the above-mentioned form of at least one, according to this disclosure, for those skilled in the art it is to be appreciated that use these forms by similar fashion.
Best mode of the present invention is implemented although described in detail, but, for those skilled in the relevant art of the present invention, within the scope of the appended claims, various alternative design and implementation example can be adopted to realize the present invention for being familiar with.
Claims (12)
1. a head restraint assembly, comprising:
Load-carrying element;
Deployable component, optionally removable between punctured position and expanded position; Described deployable component compares at described punctured position further from described load-carrying element at described expanded position;
Joint piece, is rotatably mounted relative to described load-carrying element and is rotatably mounted relative to described deployable component;
Axle, be mounted to rotate relative to described load-carrying element with described joint piece relative to described joint piece, described axle has antelabium;
Active material component, is characterized in that having first end and the second end; Wherein, described first end and the second end are arranged on the opposite side of described antelabium relative to described load-carrying element, and the centre portion of described active material component engages described antelabium; Wherein, described first end and the second end and described antelabium fully locate to make described active material component have the feature of curved shape mutually; Described active material component is activatable to rotate described axle, thus makes described deployable component shift to its expanded position from its punctured position;
Relative to the moveable thick stick of described load-carrying element, wherein, described active material Components installation is to described thick stick; With
At least one spring between described thick stick and described load-carrying element, for being biased described thick stick along the direction towards described load-carrying element.
2. head restraint assembly according to claim 1, wherein, described active material component comprises at least one in marmem, shape-memory polymer, magnetic rheology elastic body, electrorheological elastomer, electro activation poly-mer and piezoelectric.
3. head restraint assembly according to claim 2, wherein, described marmem is ferromagnetic shape memory alloys.
4. head restraint assembly according to claim 1, wherein, described active material component is line.
5. head restraint assembly according to claim 1, wherein, described active material component is arranged through activation signal and is activated, and described activation signal comprises at least one in hot activation signal, electro activation signal, magnetic activation signal, chemical activation signal and mechanical load.
6. head restraint assembly according to claim 5, comprises further: be arranged to the active device providing described activation signal to described active material component.
7. head restraint assembly according to claim 1, wherein, at least one aspect of described active material component in shape, hardness and size is outside in proportion to be applied signal and changes.
8. head restraint assembly according to claim 1, wherein, described thick stick edge is removable towards the direction of described deployable component, to reduce the strain of described active material component.
9., for optionally launching a method for head restraint assembly as claimed in claim 1, comprising:
Adopt activation signal to activate described active material component, wherein, the surface of described active material component and load-carrying element is effectively connected, and is arranged in the change stood when receiving described activation signal at least one performance; With
Described activation thus in response to the change in described at least one performance, thus rotates described axle, to activate described deployable component shifting to expanded position by the described active material component that intermediate portion engages described antelabium.
10. method according to claim 9, comprises further: make described active material component invalid, reverses to make the change at least one performance.
11. methods according to claim 9, wherein, described employing activation signal activates described active material component and comprises: execute thermal activation signal, electro activation signal, magnetic activation signal, chemical activation signal and the one selected in mechanical load.
12. methods according to claim 9, wherein, described at least one performance is: the shape of described active material component, hardness or size, and wherein, described change is outside in proportion to applies signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810087064.4A CN101823450B (en) | 2008-04-11 | 2008-04-11 | Active material head restriction component, method for locking and spreading the component |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810087064.4A CN101823450B (en) | 2008-04-11 | 2008-04-11 | Active material head restriction component, method for locking and spreading the component |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101823450A CN101823450A (en) | 2010-09-08 |
| CN101823450B true CN101823450B (en) | 2015-07-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810087064.4A Expired - Fee Related CN101823450B (en) | 2008-04-11 | 2008-04-11 | Active material head restriction component, method for locking and spreading the component |
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| Country | Link |
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| CN (1) | CN101823450B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19951966A1 (en) * | 1999-10-28 | 2001-05-03 | Bayerische Motoren Werke Ag | Headrest for vehicle seats is mounted on support pillars fitted into seat backrest and two pivot levers link headrest to cushion section to swing cushion from rest position to operating position |
| US7070235B2 (en) * | 2002-12-21 | 2006-07-04 | Keiper Gmbh & Co. Kg | Crash-active headrest |
| US20070182146A1 (en) * | 2006-02-03 | 2007-08-09 | Browne Alan L | Pyrotechnic triggering of thermally activated shape memory materials for selectively changing a structural and/or mechanical property of a vehicle member |
| US20070188004A1 (en) * | 2005-11-04 | 2007-08-16 | Gm Global Technology Operations, Inc. | Active material actuated headrest assemblies |
-
2008
- 2008-04-11 CN CN200810087064.4A patent/CN101823450B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19951966A1 (en) * | 1999-10-28 | 2001-05-03 | Bayerische Motoren Werke Ag | Headrest for vehicle seats is mounted on support pillars fitted into seat backrest and two pivot levers link headrest to cushion section to swing cushion from rest position to operating position |
| US7070235B2 (en) * | 2002-12-21 | 2006-07-04 | Keiper Gmbh & Co. Kg | Crash-active headrest |
| US20070188004A1 (en) * | 2005-11-04 | 2007-08-16 | Gm Global Technology Operations, Inc. | Active material actuated headrest assemblies |
| US20070182146A1 (en) * | 2006-02-03 | 2007-08-09 | Browne Alan L | Pyrotechnic triggering of thermally activated shape memory materials for selectively changing a structural and/or mechanical property of a vehicle member |
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| Publication number | Publication date |
|---|---|
| CN101823450A (en) | 2010-09-08 |
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