1. Tightening belts
tightening belts (PRETENSIONER SEAT BELT), also known as seat belt pre-shrinking. This belt is characterized by the moment when car crashes occur when the occupant moves forward yet it would first tighten the webbing, the crew immediately tightly tied to the chair, and then lock the webbing to prevent the occupant leaned forward effectively protect the safety of occupants. Tightening belts play a major role in the normal seat belt retractor with different functions in addition to ordinary retractable webbing retractor further includes a vehicle speed when an abrupt change occurs, can enhance occupant restraint in about 0.1 seconds force, it means there is a control and pre-tensioning device.
Product Structure
Sensor
Shared with SRS airbag system. Upon detecting an impact from the front is higher than a predetermined value tightening belts, seat belt pretensioners and SRS airbag system will start simultaneously.
power unit
by the ignition heater, ignition agent, a propellant, pistons and other components, in accordance with an ignition signal from the sensor. Using air pressure generated by push piston in the cylinder, thereby generating the tensioning force of the belt. Means for pre-tensioning the most important component of propellant added having good heat resistance and durability.
tightening device
the seat belt passes between the fixed gear and the moving gear, use does not produce any resistance to normally. Thrust device is activated after the power is converted into rotary motion by a pulley. Furthermore, sandwiched between the movable belt and the fixed gear while rotating, whereby while rotating the belt tensioner.
The reverse rotation prevention structure
Upon tightening the belt, the belt tension will cause the occupantAnti-reverse rotation of the gear engagement and keep the teeth. In order to reliably prevent the reverse rotation, for engagement of the gears in the four places.
※ belt to tighten the clamp and is configured by the original Honda, with excellent performance and high reliability.
works
boot process
When a collision occurs, upon detection of a frontal collision sensor is higher than a predetermined value, i.e., the power signal transmitted to the electronic ignition power unit, the completion of startup of the pre-tensioned belts. Prior to moving forward due to the collision, the seat belt retractor pretensioners and the passenger remains in this state. That the passenger can sit firmly on the seat. When the seat belt has not been slack, tighten the seat belt about about 50mm, if somewhat loose seat belt, it will tighten the belt maximum of about 100mm. In addition, the belt tensioning load is provided to the extent not injure the passenger.
Full procedure
First, timely tighten quot people hesitate to at a first time of the accident; press quot; on the seat. Then, appropriate to relax until the peak impact of the past, or who have been able to be protected by an air bag, seat belt that is appropriate to relax. Avoid pulling too large to make a rib injury. Are presented with the most advanced belt pretensioner and force limiter works as follows:
a, a seat belt pretensioner device . When an accident occurs, the forward person, the seat back, this time as the boot process
If the belt is too loose it is likely consequences: the occupant from the seat belt spool out the following: Alternatively, people have encountered airbag, Since the seat belt tension at a time when more than excessive and failed to tighten, which failed to advance as hoped eaten part of momentum, but all the burden are handed over to the air bag. Both cases are likely to lead to serious occupant injury. But the problem is properly installed seat belts. Loosening room come from? First, because the occupant’s clothes itself has a certain thickness, in addition to the seat belt device is also much room to hide some of the loose, this room can not be eliminated, but really an accident, you should also try to eliminate. How to do? For this reason there is such a seat belt pre-tensioners which is responsible for providing instantBetween taut seat belt.
is its role in the process: First, a probe is responsible for collecting information on the crash, and then releases an electrical pulse that is transmitted to the gas generator, the gas detonation. Rapid expansion of a gas explosion in the pipe, is pressed against the so-called ball chain, the ball forward in the blow tube, turn drives the pawl plate. Uranium pawl is integral with the plate, around the belts to the shaft. Simply put, the gas pressure to move the ball, the ball detent disc rotation drive, the disk drive pawl shaft revolution – the pretensioner function effected instantaneously belt. From the perception accident seat belt pretensioner to complete the whole process lasts only thousandths of a second. End of the pipe length is a cavity for a ball roll over shelter.
Second, the belt force limiter. After accident, under the action of the seat belt pretensioner device it has been tightened. But we hope that in force after the peak in the past, belt tensioning efforts to immediately reduce to reduce passenger stress, this special task would be completed by the belt force limiters: On the seat belt device, such as a front the pretensioner, the seat belt wound around the bottom. Inside the core shaft is a steel torsion rod. When the load reaches a predetermined case, the torsion bar begins to twist, thus relaxing the belt to a certain extent, to achieve a function of belt tension limit. Under the action of the seat belt pretensioner and the belt force limiter, the belt protection reached almost ideal state. The so-called fine to see the spirit, advanced safety belt does provide reliable security protection give passengers.
When a frontal collision occurs, tightening belts can be tightened in an instant, so that passengers to sit firmly on the seat, thereby further improving the effectiveness of the seat belt. The use of pre-tensioning device, not only to achieve a simple, comfortable effect, but also further enhance the protective effect. If both tightening belts and Honda SRS airbag system, it is possible to further increase the protective effect on passengers.
Product Type
The control device tightening belts divided in two ways:
An electronic control means by an electronic control unit (ECU) detects an abnormal change in the vehicle acceleration, after the computer processing means to a control signal sent retractor stimulate pre-tensioning device work, suchTightening belts normally used in combination with an auxiliary airbag.
Another mechanical control apparatus, the sensor detects an abnormal change in the acceleration of the vehicle, the excitation control means pre-tensioning device is operated, this tightening belts may be used alone.
There are various forms of pretensioning devices, the common pre-tensioning device is a type of deflagration, the initiator by the gas, the gas generating agent, the conduit, piston, and the drive wheel ropes composition. When the collision of the automobile after the pretensioning device is excited, the gas inside bottom sealing conduit initiator immediately spontaneous combustion, detonation of the gas generating agent sealed in the same conduit, a large amount of the gas generating agent gas expands immediately, forcing the piston moves upward pulling the rope, rope wheels driven by the drive wheel rotation number so that rotation of the spool of the retractor, the webbing is wound onto the spool, so that the webbing is pulled back. Finally, an emergency locking retractor webbing fixed body of the occupant, preventing the body forward with the steering wheel to avoid, collision panels and windows.
Use
Maintenance means
tightening belts, one belt is now widely used, also known as pre-shrinking belts. Features tightening belts is the moment when car crashes occur when the occupant moves forward yet it would first tighten the webbing, the crew immediately tightly ldquo; tied rdquo; on the seat, and then lock the webbing to prevent the occupant’s body leaning forward, effectively protect the safety of occupants. Tightening belts play a major role in the normal seat belt retractor with different functions in addition to ordinary retractable webbing retractor further includes a vehicle speed when an abrupt change occurs within 0.1s can enhance the occupant binding, it means there is a control and pre-tensioning device. Because the safety belt tightening means has a gas initiator and the gas generating agent, so that, in use, to be noted that differs from the normal seat belt. Expiration must be replaced; tightening belts only be installed on the car to design and manufacture. The car to wear a seat belt pretensioners, if not wearing a seat belt pretensioners, once the vehicle collision can not only be protected, but because of the seat belt generate pull-back action increases the likelihood of injury.
For people
ordinary passenger article
to adjust the seat, so that you can sit up. Grab a seat belt bolt head, pull the seat belts along the body down, pay attention to safety belts can not kink, and do not pull too fast, as this may lock the seat belt. The buckle tongue into the buckle until you hear a rattling sound. Pull up a pull bolt, check for locked. Check position snap release button, the button must be able to reach them, to be able to unlock the seat belt during an accident.
The lap belt should be as low as possible a number of lines, it should be close to the correct position in the lower part of the hip, femur just in contact with the upper portion, a tie at the waist. Thus, in the event of a collision, the collision force acts on the pelvic bone, and the body is unlikely to slide under the lap belt. Shoulder belt should be based on the shoulder, across the chest, it must not be placed under his arm.
do not allow the seat belt is pressed against the hard or fragile objects, such as clothes glasses, pens, or other key; do not let the seat belt rubbing with a sharp edge, so as not to damage the belt; Do not let the seatback is tilted too far, or the belt will not be properly elongated and winding; when no seat, to the seat belt retractor return, during emergency braking to avoid impinging on the buckle tongue other objects leading to not work properly.
In order to fasten the lap belt, the occupant must be pulled down from the end of the lap belt buckle, while pulling up the shoulder belt.
pregnant articles
pregnant ladies often for fear of safety belts will somehow harm an unborn baby and chose not to wear a seat belt. Experts recommend that pregnant women be sure to wear seat belts, even late in pregnancy need, but note that you must wear a seat belt properly.
Pregnant proper use of seat belts is: belt should be pressed through the beveled portion of the middle of the chest, as close to the bottom of the buttocks, legs and thighs belt must cross the abdomen below the ridge, It must not be tied to the pregnant woman’s belly, because it would harm the fetus. The latter is particularly important because the seat belt in the front abdominal portion of the slide if the vehicle collision, the result will cause harm to both mother and baby.
is not comfortable to use seat belts in terms of a widespread problem, and some pregnant women use Ms. Ann in late pregnancyCompare trouble when surrounded by their own full band. Security experts suggest that if found to be pregnant lady surrounded themselves with seat belts, it should try to avoid traveling by car. Pregnant women should also avoid frequent travel in late pregnancy, because the steering wheel and airbag are likely to harm the mother and the unborn baby in a car accident.
children’s articles
death or disability of the child in a car accident, often because parents do not give their children wear seatbelts, child seat belt use or the use of way the shape is not suitable for children’s safety seats, and some even do not have any safety devices to protect children. Giving children equipped with the appropriate child safety seat at the same time, the more important is to give them the right to wear seat belts.
with a belt anchor backrest can better. When the child is seated with or without a backrest on the backrest cushion, would use a standard three-point seat belt buckle, the seat belt is secured on the importance of properly. Use a cushion to ensure proper security angle, seat belts must cross the shoulder and across the chest too, to minimize the gap. When the seat belt buckle to the child, remember that there is a gap where the tension, the less the gap, belt the better you can protect children. Seat belt close to the child’s neck will not be affected much, this may look more uncomfortable, but if a traffic accident, the child will not be reined it in. If the car suddenly stops, the child’s head will be leaning forward, and the seat belt will be more shifted to the shoulder.
If the oblique shoulder belt tightly affixed to the edge will be even greater risk. When a traffic accident occurs, the belt could slip, children may be thrown from the top of it to go. In any case, when the child restraint should not let the seat belt under the arm, otherwise the child would be thrown forward to even wear out from the windshield. Seat belts must pass through the legs from the hips go, and then to the top of the thigh, and make sure it is tightly tied to the sides of the cushion-like tentacles protective equipment, if not, it is likely to slide into the child in a road accident abdomen, resulting in the risk of internal injuries. Child seat belt can not cross the legs and pelvis protection of children, because children’s pelvis relative to adults is not well developed.
Notes
tightening belts can not be used again after startup. have toReplaced together with the retractor and buckle.
If the vehicle is subjected to impact, but the pre-tensioner does not start, make sure to check specialty stores pre-tensioner system. If necessary, replace.
can not make any unauthorized changes to any part of the line or the seat belt pretension systems, this is to prevent accidental actuation tightening belts or tightening belts system damage.
safety belt tightening system and maintenance work should be done by surrounding shops.
can not be altered or cut line SRS. Unauthorized electrical test equipment and detection equipment can not be used in safety belt tightening system.
If you need to deal with tightening belts system or scrap the car, please contact franchise stores.
have the right pretensioners in the maintenance manual handler. Incorrect handling procedures can result in personal injury.
pretensioner installed in the front seat and the seat belt retractor holder, which seat belt webbing with conventional methods using the same.
When tightening belts start, you will hear considerable noise, will then emerge smoke, this non-toxic smoke nor fire, but please be careful not to inhale, otherwise it will cause respiratory irritation or suffocation, for those who have had breathing difficulties should immediately to fresh air.
Accessories
Efficient pretensioner
An efficient tightening belts pretensioners, purpose to provide a simple structure, small size, low cost, high power transmission efficiency pretensioner comprising a piston rod guide head, the cylinder, the gas generator, the gas generator is a signal line connected rope reel core axis, the power wheel, the locking pawl, the base, slide rod, when a vehicle collision occurs, the sensor will be paid to the gas generator generates a trigger signal blasting, high-pressure gas generated push rod and the piston rod guide in the cylinder head campaign to promote the movement of the connection cord, pull cord connecting the power wheel in turn, rotates the locking pawl when the wheel rotates with the power and the engaging claws pressed to the inside, locking claw is pressed after the power wheel spindle and the reel device end portions are locked together, so that the reel spindle is rotated in synchronism with the power wheel andIn the above belt webbing wound recovery, the pull back of the occupant, the occupant eliminate the gap to achieve the object of the preload, the effect of improving the protection of the belt.
biasing means explosion
blasting tightening belts in the belt tensioning mechanism is also a set of explosive devices, the safety device is triggered when the explosive automatically tensioning belt, it will set off along with the air bag, seat belt but strong in impact strength but insufficient to detonate the explosive device object of the airbag under the condition that will trigger the occupant’s body to prevent forward setting and steering wheel, dashboard collision damage, while it can still be the same as a normal seat belt use after explosive devices triggered.