CN102407943A - Protective device for head and neck injuries - Google Patents
Protective device for head and neck injuries Download PDFInfo
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- CN102407943A CN102407943A CN201110306443XA CN201110306443A CN102407943A CN 102407943 A CN102407943 A CN 102407943A CN 201110306443X A CN201110306443X A CN 201110306443XA CN 201110306443 A CN201110306443 A CN 201110306443A CN 102407943 A CN102407943 A CN 102407943A
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Abstract
The invention discloses a protective device for head and neck injuries and belongs to the field of flight protection. The protective device comprises a helmet and a seat, wherein a restraining rope set is fixed on the helmet; a C-shaped headrest is arranged at the top of the seat; the restraining rope set passes through a restraining connecting device set and is connected to a force limiter set; an output end of an acceleration transducer is connected to an input end of a controller; the output end of the controller is connected to the input end of the force limiter set; when a high G load condition is detected by the acceleration transducer, the force limiter set is controlled to act by the controller and the restraining rope set is pulled inwards, so as to restrain the helmet and avoid hurting the head and neck of a pilot; and when the release of the high G load condition is detected by the acceleration transducer, the force limiter set is controlled to act by the controller and the inward pulling of the restraining rope set is released, thereby removing the restraining on the helmet and avoiding the influence on the driving comfortableness.
Description
Technical field
The present invention relates to a kind of head and neck injury protection device, especially a kind of head and neck injury protection device that is applicable to aviator and astronaut.
Background technology
Neck injury is comparatively common in the aviator.External professional pilot's neck injury incidence is up to 85.5%; According to investigations, the aviator of my army 73.9% once lived through neck injury, thought that the aviator that neck injury influences flight training accounts for 47.1%.Reported that neck injury comprises that fracture of cervical spine, laceration of ligament, intervertebral disc degeneration, intervertebral disk hernia and cervical muscle pull etc., individual main suit mainly shows as neck discomfort, cervical pain.
Aeroplane performance is good more, and its aviator can bear higher G load more.U.S. high-performance fighter aircraft aviator has 50 ~ 70% to feel cervical pain awing, and there are indications that its trend that develops into carrying out property cervical arthritis is rising.The F-16 opportunity of combat aviator incidence that neck injury took place in 1 year of flying is 56.6%, and China destroys-8 aviator's cervical pain rates apparently higher than other machine aviator.Domestic and international so far aeronautical chart all solves the protection question of aviator's neck injury also not yet in effectly.Along with the progressively raising of air maneuver performance, the incidence of aviator's neck injury will significantly improve, and neck will become the weak link in high performance airplane people-machine-environment.Therefore develop the protective device that is used for neck injury the neck injury that prevents high performance airplane aviator or astronaut is had significance.
Research shows that neck over stretch, muscle excess shrinkage, cervical spinal canal pressure pulsation and factors such as shearing and axial compression effect all possibly be the mechanical mechanisms that causes neck injury.Pulling with the G increment rate of cervical muscle is directly proportional, and high G load causes before aviator's head and neck excessively bent, and the cervical muscle extensibility surpasses its limit value and will cause cervical muscle to be pulled; Laceration of ligament with high G value, cervical muscle is tired or malposition injured and head and neck is relevant.Under high G value and high G rate of rise condition, the moment that acts on cervical vertebra increases, and anti-in limited time above it when the stress that acts on vertebra, cervical vertebra will cause fracture.Fracture site mostly occurs at C
5, C
6, C
7Leading edge.When the less G value that has high G value or repeat is done the time spent, press in the interverbebral disc to increase, possibly cause cartilage endplate damage up and down, so that its penetrating power descends, make the subalimentation of supplying with nucleus pulposus just to cause interverbebral disc that regression takes place ahead of time.The interverbebral disc elasticity of regression reduces, and its load-carrying capacity also descends.Reversing is the major cause that causes annulus fibrosus breaks.Under the effect of nucleus pulposus pressure, the protrusion of the intervertebral disc just appears in the position of annulus fibrosus breaks easily.The appearance of acute intervertebral disk hernia generally has two conditions: one is to bear high G load, and another is that the aviator has the head twist action when bearing high G load.
Research show that also a pin generally cervical pain can not occur to acceleration/accel (Gz) when reaching 4g, greater than 4g then the neck injury rate increase gradually.People such as Jones discover, cervical vertebra ache can occur during head rotation when Gz surpasses 5g.It is pointed out that also prolonged and repeated low G loading meeting causes neck injury, it is due to the damage of accumulative total property.Auto-industry circle then are according to the relative acceleration (a between last neck and the following neck
Rel) and relative velocity (v
Rel) formulated neck injury standard NIC (Neck Injury Criterion).
NIC has reflected the relative motion amplitude between head and the trunk, is mainly used in assessment ventrodorsad acceleration/accel (Gx) load.A large amount of neck impulse withstand tests draw following damage threshold:
crooked moment of torsion: 190 Nm, and moment of torsion turns up: 57 Nm;
axial tension: 3300 N (peak value), axle pressure: 4000 N (peak value);
be shearing: 3100 N (peak value) axially.Liu etc. have proposed the neck injury factor N of prediction neck injury
Ij, and exceed with insufferable cervical pain, formulate cervical range of motion and allowed applied loading:
Anteflexion ɑ=610 ~ 770, M=190Nm;
After stretch ɑ=600 ~ 760, M=68Nm.Other has some other index to be used for lesion assessment: for example, and neck shearing/extending force, moment, Nkm, LNL etc.
Up to now; Various countries mainly protect the damage of high G load to aviator's neck from following several respects:
according to human body corresponding standard is formulated in the tolerance interval that acceleration/accel impacts, like " people-system integration standard (Man-Systems Integration Standard) ", " the space safety guide " of China of the U.S.;
is strict to be selected and the routine physical examination standard; As it is movable first selected to limit the little joint function disorder of cervical vertebra, cervical vertebra; Pay close attention to the slight damage of aviator's neck, in case roll up serious chronic cervical spondylosis;
improves passenger cabin Ergonomy environment; Optimize occupant restrain system; Make passenger cabin meet the physiotechnology design; Reach safe, efficient and comfortable, as optimizing the helmet, adjust the casterangle of seat and designing head and neck supportive device etc.;
improves the pilot operator rules, avoids because of the movable improper damage that causes of neck;
according to the biomechanics characteristic of neck movement routine taken exercise and special training combines, and has formulated the special neck training program to the F-16 opportunity of combat of a cover like U.S. army.
At present, the anti-neck injury device of auto-industry is used more extensive aspect the protection of neck whiplash injury, and can retrieve lot of documents or patent.It is to be noted; Mostly whiplash injury protective device in the auto-industry is to be knocked into the back and develop to automobile; Mainly be to solve the neck injury problem that the occupant causes because of flat-out acceleration, but the height acceleration of aviator's neck injury in take-off process, the high deceleration/decel in the landing mission arranged also; Fly in addition various attitude changes in the operation process, therefore existing neck injury protective device can't solve the protection question of aviator's neck injury.In addition; China aviator build significantly is different from American-European ethnic group; (numeral or physics dummy) studies neck injury with American-European ethnic group build, and optimizes the cockpit structure and the occupant restrain system of aircraft with this, obviously can not effectively solve China aviator's neck injury protection question.
Summary of the invention
The purpose of this invention is to provide a kind of head and neck injury protection device, can be when high G load condition, the head and neck motion of control chaufeur; To avoid the damage of chaufeur head and neck; And when the cruising state, remove the constraint of chaufeur head and neck, in order to avoid influence driving comfort.
To achieve these goals; The invention provides a kind of head and neck injury protection device; Comprise the helmet and seat, it is characterized in that: be fixed with constraint rope group on the said helmet, the top of said seat is provided with " C " shape headrest; Said constraint rope group is passed constraint connecting device group and is connected with the force-limiting device group, and the input end that the input end of the mouth connection controller of acceleration pick-up and the mouth of controller connect said force-limiting device group connects;
When said acceleration pick-up detected high G load condition, said controller was controlled said force-limiting device group action, stops said constraint rope group outwards to spur, to retrain the said helmet; When said acceleration pick-up detected said high G load condition and removes, said controller was controlled said force-limiting device group action, removes the prevention to said constraint rope group, to remove the constraint to the said helmet.
Said constraint rope group is passed said constraint connecting device group and also is connected with the pre-tightening apparatus group, is used for when the cruising state, to said constraint rope group predetermincd tension being provided, and makes it in tension.
In the backrest of said seat height adjustment mechanism is installed, is used for adjusting the height of said seat according to the height of chaufeur.
Said constraint connecting device group is arranged on said " C " shape headrest; And said constraint connecting device group is made up of three constraint connecting devices; Wherein the first constraint connecting device and the 3rd constraint connecting device are arranged on the two ends of said " C " shape headrest, and the second constraint connecting device is arranged on the centre of said " C " shape headrest.
Said force-limiting device group is made up of first force-limiting device, second force-limiting device and the 3rd force-limiting device; Said constraint rope group is made up of the first constraint rope, the second constraint rope and the 3rd constraint rope; Said constraint connecting device group is made up of the first constraint connecting device, the second constraint connecting device and the 3rd constraint connecting device; And said pre-tightening apparatus group is made up of first pre-tightening apparatus, second pre-tightening apparatus and the 3rd pre-tightening apparatus; An end connected said first force-limiting device after the wherein said first constraint rope passed the said first constraint connecting device, and the other end connects said first pre-tightening apparatus; An end connected said second force-limiting device after the said second constraint rope passed the said second constraint connecting device, and the other end connects said second pre-tightening apparatus; An end connected said the 3rd force-limiting device after said the 3rd constraint rope passed said the 3rd constraint connecting device, and the other end connects said the 3rd pre-tightening apparatus.
Said acceleration pick-up is selected the sensor of measuring three-dimensional acceleration for use.
Under said high G load condition, resultant acceleration is greater than or equal to 4g, and wherein g is an acceleration due to gravity.
In sum, owing to adopted technique scheme, the invention has the beneficial effects as follows:
1, the helmet is connected with the force-limiting device group through the constraint rope, when acceleration pick-up detected high G state of flight, controller was controlled the force-limiting device group and is moved; Stop and outwards pull on the moving constraint rope; Prevent aviator's head and neck damage when high G load condition, and acceleration pick-up is when detecting high G load condition and removing, the action of controller control force-limiting device group control force-limiting device; Releasing is to the constraint of the helmet, in order to avoid influence driving comfort;
2, adopt pre-tightening apparatus, be used for to constraint rope group predetermincd tension being provided, accelerated to realize the response time of chaufeur head and neck constraint at the cruising state, and the mutual winding of placing many ropes;
3, adopt height adjustment mechanism; Can adjust the height of seat according to aviator's height; Make chaufeur under normal sitting position; The constraint connecting device that is fixed on constraint rope and " C " shape headrest on the helmet remains on same level height, so that more obvious to the binding effect of head and neck;
4, adopt three constraint connecting devices, three force-limiting devices and three pre-tightening apparatus respectively; And three constraint connecting devices are separately positioned on the two ends and the middle part of " C " shape headrest; Reasonably from three direction constrain helmets; Reasonably solved the normal of aviator's head and neck in the normal flight process and moved, aviator's head rotation occurs and quickens or sideway movement when having avoided high G load condition again effectively;
5, the sensor of three-dimensional acceleration can detect a
x, a
yAnd a
zTo accekeration, as long as resultant acceleration G (
) greater than 4g, controller will be controlled the head and neck of force-limiting device group constraint chaufeur.
Description of drawings
The present invention will explain through example and with reference to the mode of accompanying drawing, wherein:
Fig. 1 is a structure principle chart of the present invention;
Fig. 2 is the structure principle chart of first embodiment among the present invention;
Fig. 3 is a workflow diagram of the present invention;
Fig. 4 is the structural representation of acceleration pick-up;
Fig. 5 is the structural representation of constraint connecting device.
Mark among the figure: 1 is the helmet, and 3 are the constraint rope, and 4 is " C " shape headrest, and 5 is the force-limiting device group, and 5-1 is first force-limiting device; 5-2 is second force-limiting device, and 5-3 is the 3rd force-limiting device, and 6 is the pre-tightening apparatus group, and 6-1 is first pre-tightening apparatus; 6-2 is second pre-tightening apparatus, and 6-3 is the 3rd pre-tightening apparatus, and 7 is acceleration pick-up, and 8 is controller; 9 are constraint connecting device group, and 9-1 is the first constraint connecting device, and 9-2 is the second constraint connecting device, and 9-3 is the 3rd constraint connecting device.
The specific embodiment
Disclosed all characteristics in this specification sheets, or the step in disclosed all methods or the process except mutually exclusive characteristic and/or the step, all can make up by any way.
Disclosed arbitrary characteristic in this specification sheets (comprising any accessory claim, summary and accompanying drawing) is only if special narration all can be replaced by other equivalences or the alternative features with similar purpose.That is, only if special narration, each characteristic is an example in a series of equivalences or the similar characteristics.
As shown in Figure 1; This head and neck injury protection device comprises the helmet 1, seat 2, constraint rope group 3, " C " shape headrest 4, force-limiting device group 5, pre-tightening apparatus group 6, acceleration pick-up 7, controller 8, constraint connecting device group 9 and height adjustment mechanism 10; (helmet 1 can adopt hook mode with the fixed form of constraint rope group 3 wherein to be fixed with constraint rope group 3 on the helmet 1; Promptly the end at the constraint rope is provided with hook; The helmet is provided with butt hook), the top of seat 2 is provided with " C " shape headrest 4, and constraint rope group 3 is passed constraint connecting device group 9 and is connected with force-limiting device group 5, pre-tightening apparatus group 6 respectively; The mouth of acceleration pick-up 7 connects the input end of controller 8, and the input end that the mouth of controller 8 connects force-limiting device group 5 connects.When acceleration pick-up 7 detects when being in the cruising state; Pre-tightening apparatus group 6 provides predetermincd tension to constraint rope group 3; Make that constraint rope group 3 is in tension always; The head and neck of chaufeur can be free movable in the cruising process, when being high G load condition by the cruising state exchange, accelerated to realize the response time of chaufeur head and neck constraint; When acceleration pick-up 7 detects high G load condition (is that resultant acceleration is greater than or equal to 4g; Wherein g is an acceleration due to gravity) time; 5 actions of controller 8 control force-limiting device groups; Stop to be pulled outwardly moving constraint rope group 3, thereby the constraint helmet 1 prevents chaufeur head and neck damage when high G load condition; When acceleration pick-up 7 detected high G load condition releasing (being that resultant acceleration is less than 4g), 5 actions of controller 8 control force-limiting device groups remove the prevention to constraint rope group 3, thereby releasing were to the constraint of the helmet 1, in order to avoid influence driving comfort.Certainly, under high G load condition, according to different protection purposes, can set different resultant acceleration limit values, such as 3g, 5g etc., wherein g representes acceleration due to gravity.In addition; When three acceleration pick-ups being set to detect respectively the acceleration/accel of X axle, Y axle and Z-direction; Controller is gathered the acceleration/accel of all directions; And calculate resultant acceleration
; Wherein
representes the acceleration/accel of X-direction; The acceleration/accel of
expression Y direction, and the acceleration/accel of
expression Z-direction.
Because pre-tightening apparatus has been widely used in fields such as car belt, and force-limiting device is the general-duty device, therefore the concrete structure of pre-tightening apparatus and force-limiting device do not tired out at this and states.In addition, pre-tightening apparatus group, force-limiting device group, controller can be installed on any position of whole head and neck injury protection device, such as in the backrest that is arranged on seat, the base plate of seat is first-class.
Height adjustment mechanism 10 is installed in the backrest of seat 2; Be used for height according to aviator's height adjustment seat; Make chaufeur under normal sitting position; The constraint connecting device that is fixed on constraint rope and " C " shape headrest on the helmet remains on same level height, so that more obvious to the binding effect of head and neck.Height adjustment mechanism is not done detailed description to the concrete mounting means of height adjustment mechanism 10 here using to some extent aspect the adjustment seat.
Component count can be adjusted arbitrarily according to the actual requirements in above-mentioned constraint rope group 3, force-limiting device group 5, pre-tightening apparatus group 6 and the constraint connecting device group 9.In the first embodiment of the present invention, as shown in Figure 2, constraint rope group 3 is made up of three ropes; Accordingly; Force-limiting device group 5 is made up of three force-limiting devices, and pre-tightening apparatus group 6 is made up of three pre-tightening apparatus, and constraint connecting device group 9 is made up of three constraint connecting devices.Be fixedly connected with constraint rope group 3 on the helmet 1; Wherein the first constraint rope 3-1 passes the first constraint connecting device 9-1 and is connected with the first force-limiting device 5-1, the first pre-tightening apparatus 6-1 respectively; The second constraint rope 3-2 passes the second constraint connecting device 9-2 and is connected with the second force-limiting device 5-2, the second pre-tightening apparatus 6-2 respectively, and the 3rd constraint rope 3-3 passes the 3rd and retrains connecting device 9-3 and be connected with the 3rd force-limiting device 5-3, the 3rd pre-tightening apparatus 6-3 respectively.Acceleration pick-up 7 is selected the sensor that can measure three-dimensional acceleration for use; The mouth of controller 8 is connected with the first force-limiting device 5-1, the second force-limiting device 5-2 and the 3rd force-limiting device 5-3 respectively; And the first constraint connecting device 9-1 and the 3rd constraint connecting device 9-3 are arranged on the two ends of said " C " shape headrest 4, and the second constraint connecting device 9-2 is arranged on the centre of said " C " shape headrest 4.When acceleration pick-up 7 detects when being in the cruising state; The first pre-tightening apparatus 6-1, the first pre-tightening apparatus 6-2 and the first pre-tightening apparatus 6-3 provide predetermincd tension to the first constraint rope 3-1, the second constraint rope 3-2 and the 3rd constraint rope 3-3 respectively, make on three directions all in tension.(promptly detect resultant acceleration and surpass 4g when acceleration pick-up 7 detects high G load condition; Wherein g representes acceleration due to gravity) time; The controller 8 controls first force-limiting device 5-1, the second force-limiting device 5-2 and the 3rd force-limiting device 5-3 action stop the outwards pulling first constraint rope 3-1, the second constraint rope 3-2 and the 3rd constraint rope 3-3 respectively, to retrain the helmet from three directions; The head and neck that not only can prevent chaufeur seesaws, and can also prevent the head and neck side-to-side movement of chaufeur.When acceleration pick-up 7 detects high G load condition and removes; The controller 8 controls first force-limiting device 5-1, the second force-limiting device 5-2 and the 3rd force-limiting device 5-3 action; Releasing is to the prevention of the first constraint rope 3-1, the second constraint rope 3-2 and the 3rd constraint rope 3-3, to remove the constraint of the helmet 1.
As shown in Figure 3, the control method of head and neck injury protection is made up of following steps among the present invention:
S1, system initialization are gathered acceleration information and are calculated resultant acceleration when acceleration pick-up 7, judge whether resultant acceleration surpasses 4g; If judgement surpasses 4g then representes the acceleration overload that goes; 5 actions of controller 8 control force-limiting devices, it is moving to stop the constraint rope to be pulled outwardly, the constraint helmet 1; If judge not surpass 4g, then continue to gather acceleration information;
S2, controller 8 judge once more whether resultant acceleration surpasses 4g, if judgement surpasses 4g then representes the acceleration overload that goes, controller 8 continues 5 actions of control force-limiting devices, retrains the helmet; If judge not surpass 4g, helmet constraint is removed in 5 actions of controller 8 control force-limiting devices.
This acceleration pick-up 7 is selected the sensor of measuring three-dimensional acceleration for use; It can be the single-piece three dimension acceleration sensor; Such as full shearing three-dimensional acceleration pick-up of strain-type etc.; Also can be that three sensors are combined in respectively on the surface of test block, thereby realize the three-dimensional acceleration measurement, as shown in Figure 4.
As shown in Figure 5, the constraint rope is walked around the constraint connecting device, and an end is connected with pre-tightening apparatus, and the other end is connected with force-limiting device.If do not adopt the constraint connecting device, then necessarily require force-limiting device group, pre-tightening apparatus group and retrain rope in same level height, could realize the stretching of constraint rope.The present invention can adopt lever, pulley etc. as the constraint connecting device.
The present invention is not limited to the aforesaid specific embodiment.The present invention expands to any new feature or any new combination that discloses in this manual, and the arbitrary new method that discloses or step or any new combination of process.
Claims (7)
1. head and neck injury protection device; Comprise the helmet (1) and seat; It is characterized in that: be fixed with constraint rope group (3) on the said helmet (1); The top of said seat is provided with " C " shape headrest (4), and said constraint rope group (3) is passed constraint connecting device group (9) and is connected with force-limiting device group (5), and the input end that the input end of the mouth connection controller (8) of acceleration pick-up (7) and the mouth of controller (8) connect said force-limiting device group (5) connects;
When said acceleration pick-up (7) detected high G load condition, said controller (8) the said force-limiting device group of control (5) action stoped outwards pulling of said constraint rope group (3), to retrain the said helmet (1); When said acceleration pick-up (7) detected said high G load condition and removes, the prevention to said constraint rope group (3) was removed in said controller (8) the said force-limiting device group of control (5) action, to remove the constraint to the said helmet (1).
2. head and neck injury protection device according to claim 1; It is characterized in that: said constraint rope group (3) is passed said constraint connecting device group (9) and also is connected with pre-tightening apparatus group (6); Be used for when the cruising state, predetermincd tension being provided, make it in tension to said constraint rope group (3).
3. head and neck injury protection device according to claim 1 is characterized in that: in the backrest of said seat height adjustment mechanism is installed, is used for adjusting according to the height of chaufeur the height of said seat.
4. head and neck injury protection device according to claim 1 and 2; It is characterized in that: said constraint connecting device group (9) is arranged on said " C " shape headrest (4); And said constraint connecting device group (9) is made up of three constraint connecting devices; Wherein the first constraint connecting device (9-1) and the 3rd constraint connecting device (9-3) are arranged on the two ends of said " C " shape headrest (4), and the second constraint connecting device (9-2) is arranged on the centre of said " C " shape headrest (4).
5. head and neck injury protection device according to claim 2; It is characterized in that: said force-limiting device group (5) is made up of first force-limiting device (5-1), second force-limiting device (5-2) and the 3rd force-limiting device (5-3); Said constraint rope group (3) is made up of the first constraint rope (3-1), the second constraint rope (3-2) and the 3rd constraint rope (3-3); Said constraint connecting device group (9) is made up of the first constraint connecting device (9-1), the second constraint connecting device (9-2) and the 3rd constraint connecting device (9-3); And said pre-tightening apparatus group (6) is made up of first pre-tightening apparatus (6-1), second pre-tightening apparatus (6-2) and the 3rd pre-tightening apparatus (6-3); The wherein said first constraint rope (3-1) passes said first constraint connecting device (9-1) back one end and connects said first force-limiting device (5-1), and the other end connects said first pre-tightening apparatus (6-1); The said second constraint rope (3-2) passes said second constraint connecting device (9-2) back one end and connects said second force-limiting device (5-2), and the other end connects said second pre-tightening apparatus (6-2); Said the 3rd constraint rope (3-3) passes said the 3rd constraint connecting device (9-3) back one end and connects said the 3rd force-limiting device (5-3), and the other end connects said the 3rd pre-tightening apparatus (6-3).
6. head and neck injury protection device according to claim 1 is characterized in that: said acceleration pick-up (7) is selected the sensor of measuring three-dimensional acceleration for use.
7. head and neck injury protection device according to claim 1 is characterized in that: under said high G load condition, resultant acceleration is greater than or equal to 4g, and wherein g is an acceleration due to gravity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110306443.XA CN102407943B (en) | 2011-10-11 | 2011-10-11 | Protective device for head and neck injuries |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110306443.XA CN102407943B (en) | 2011-10-11 | 2011-10-11 | Protective device for head and neck injuries |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102407943A true CN102407943A (en) | 2012-04-11 |
| CN102407943B CN102407943B (en) | 2014-04-16 |
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ID=45910360
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110306443.XA Expired - Fee Related CN102407943B (en) | 2011-10-11 | 2011-10-11 | Protective device for head and neck injuries |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4477041A (en) * | 1982-08-19 | 1984-10-16 | Michael Dunne | Head and neck restraint system |
| EP0361369A2 (en) * | 1988-09-27 | 1990-04-04 | Rockwell International Corporation | Head support/spine offloading ejection seat insert |
| JPH02246899A (en) * | 1989-03-20 | 1990-10-02 | Mitsubishi Heavy Ind Ltd | Seat device |
| US4967985A (en) * | 1986-09-19 | 1990-11-06 | British Aerospace Plc | Aircrew restraint systems |
| US5267708A (en) * | 1992-09-28 | 1993-12-07 | Rockwell International Corp. | Head support apparatus |
-
2011
- 2011-10-11 CN CN201110306443.XA patent/CN102407943B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4477041A (en) * | 1982-08-19 | 1984-10-16 | Michael Dunne | Head and neck restraint system |
| US4967985A (en) * | 1986-09-19 | 1990-11-06 | British Aerospace Plc | Aircrew restraint systems |
| EP0361369A2 (en) * | 1988-09-27 | 1990-04-04 | Rockwell International Corporation | Head support/spine offloading ejection seat insert |
| JPH02246899A (en) * | 1989-03-20 | 1990-10-02 | Mitsubishi Heavy Ind Ltd | Seat device |
| US5267708A (en) * | 1992-09-28 | 1993-12-07 | Rockwell International Corp. | Head support apparatus |
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|---|---|
| CN102407943B (en) | 2014-04-16 |
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