Land vehicles – Skates – Shoe attaching means
Patent
1981-03-02
1983-09-20
Peters, Jr., Joseph F.
Land vehicles
Skates
Shoe attaching means
A63C 908
Patent
active
044051514
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a locking device for an electronic safety ski binding comprising two interengaged members of which the locked member is connected to a sole retainer and is movable between its releasing and its retaining position in which it is held by the locking other member which is movable by an electromagnet.
Electronic safety ski bindings known for example from DE-OS No. 22 44 949 and 25 19 544 consist of force receivers which emit electric signals and detect forces and/or torques acting on the leg of a skier, and an electronic circuit which, on occurrence of dangerous forces or torques, actuates the releasing device by means of a releasing signal. The mechanical releasing device comprises a lock which is released by the force of an electromagnet operated by the releasing signal. Rod or U-shaped electromagnets are employed of which the force exerted on the movable armature primarily depends, inter alia, on the length of the air gap and which are unable to prevent release of the lock through vibrations or other external influences.
It is therefore the problem of the present invention to provide a shockproof lock for an electronic safety ski binding that is provided with a reliably operative electromagnet.
According to the invention, this problem is solved in that a rotary magnet is provided to move the locking member.
In a constructional embodiment of the invention, the locking member comprises a pivotably mounted two-armed lever of which the first arm is provided with a hook-shaped projection holding the locked member in the retaining position and the second arm is engaged by a cam which is secured to the shaft of the rotary magnet and which, on actuation, brings the hook-shaped projection out of engagement with the locked member. Desirably, the arms of the two-armed lever are at an angle to each other, the second arm comprising a projection disposed in the pivotal path of the cam moved by the rotary magnet. The cam disposed at the periphery of a plate and the projection may be provided with substantially complementary oblique faces and/or curved ramps.
Unintentional release of the locking device as a result of shocks is reliably avoided in that, adjoining the oblique face or curved ramp, the cam has an end face which is concentric with the plate and, in the locked position, abuts a projection which is disposed on the side of the first arm opposite to the hook-shaped projection and runs off same when the rotary magnet has turned the plate so far that the cam is just leaving the projection of the second arm. According to this inventive development, the locked member is reliably held in its locked position in that the cam holds the first arm in its position at which it is locked to the locked member and releases same only when, for the purpose of pivoting the two-armed lever, it runs onto the projection provided on its second arm.
Desirably, a counterweight is disposed on the side of the plate opposite to the cam for compensating the weight and flywheel effect thereof.
One example of the invention will now be described in more detail with reference to the drawing in which the single FIGURE is a diagrammatic front elevation of the locking device.
The slide 1 forms a locked member which is connected in a manner not illustrated to the sole retainer of an electronic safety ski binding and in its illustrated retaining position, is latched to the locked member consisting of a two-armed lever 3. For instance, FIG. 6 of DE-OS No. 25 19 544 illustrates a ski binding having a handle similar to the slide 1 that has a right-hand end forming a latching element similar to latching lug 2 of the slide 1. Movement of the handle controls movement of a heel plate stud that locks a ski boot securely to a ski.
The slide 1 is subjected in the direction of the arrow A to the force of a spring (not shown) and held for longitudinal displacement in a longitudinally extending guide of the housing 4. At its outer free end, the slide 1 comprises a latching lug 2 behind which there is engaged in the illustrated retaining po
REFERENCES:
patent: 3794339 (1974-02-01), Smolka
patent: 3907316 (1975-09-01), Marker
D'Antonio Nicholas F.
Klubitschko Gerd
Knabel Walter
Stempfhuber Lorenz
Marker Patentverwertungsgesellschaft mbH
Peters Jr. Joseph F.
Rice Kenneth R.
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