A bit OT, but you folks seem to know just about "everything", so let me
Son has a Subaru Outback, and a car child seat.
The strap that is meant, apparently, to secure the very top of the seat
(from rotating forward) extends from the roof right behind the seat.
Has a simple hook on the end to latch onto the top of the child seat.
It seems to work on a "retractor" principle, the same way the normal car
seat belts function.
Question: there is considerable (actually quite a lot) of play in this
Presumably, if it ever senses a forward de-acceleration, it would "latch".
But hard to believe that it would latch before there is a lot of forward
movement of the child seat's top.
Is this the way these things are meant to operate ?
Am I missing something ?
Thanks,appreciate your thoughts on,
What you're describing is called inertia belts, or reels maybe, if you
want to look on the web. They were meant to make people freer to
move around when the belt was on.
Probably, but I can see why you think it would need to be different
for a baby.
Yes, what year is the car? For some or all the belts on some or all
cars, especially I would think more recent ones, BUT PROBABLY ONLY ON
THE FRONT SEATS, there are electrically triggered explosions in the
retractors, specifically pretensioners, that I think are supposed to
lock them, the ones I guess that aren't fully retracted, even faster
than the inertia gizmo. Hard to believe. The explosive has to be
The pretensioner mechanism uses an explosive charge to drive a
concealed piston when sensors detect the signature abrupt deceleration
of an accident. The piston, in turn, rapidly drives the spool around
which the fabric strap of a seatbelt is wrapped. That incredibly fast
retraction of the belt fabric removes the slack from the belt
instantly. This extra seatbelt "pre-" tension, moments prior to the
full force of impact, pulls the bodies of the driver and front-seat
passenger firmly into their seats. This positions them so as to
receive the maximum protection benefit of the front airbags
I hit a curb once going about 40mph, and indeed the seatbelt locked as
it was supposed to and I only went forward about an inch. The
pretensioner didn't go off, and my car has them. The air bag didn't
go off either, and maybe that was because when I was working on the
dash I separated an electric connector. I didn't mean to do that but
it might have saved me from buying a new airbag. The airbag
connectors are yellow! I think all of them are.
On Thursday, July 7, 2016 at 4:02:57 PM UTC-4, Bob wrote:
When my kids were young, we used these clips to "lock" the shoulder strap to the seat strap,
eliminating all movement and the need for the shoulder belt to "latch" with hard braking.
Not sure how it would apply in your situation, but I figured I'd toss it out anyway.
I've got them in the back seat of my '08 and '16 Subaru's. Does not
take more than a little tug to lock otherwise it lets you slowly move
like all other belts in the car. Only in back seat from the roof
because it allows three people to belt up there. In front with bucket
seats, you only seat two. I don't think my wife used the roof strap but
seats grandchildren on one side or the other.
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