Actuator mechanism and a shutter mechanism
AssigneeNokia Corporation
InventorsMatti Ryynänen, Anssi Vänskä, Matti Kosonen, Ilpo Kauhaniemi, Sami Myyryläinen
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Abstract
In one example, an actuator mechanism comprising: one or more coils for establishing a magnetic field; a rotating permanent magnet, which has at least one extreme position depending on the magnetic field; and driving members, which are coupled to the permanent magnet and by means of which the members coupled to the actuator mechanism are driven. In another example, an actuator mechanism comprising: one or more wires, which are manufactured of a shape memory alloy that shrinks when heated; and driving members, which are coupled to said wire and by means of which the members connected to the actuator mechanism are driven.
Claims20
An actuator mechanism comprising:
- a wire manufactured of a shape memory alloy configured to shrink when heated, and
- driving members coupled to said wire and configured to drive members connected to the actuator mechanism, the actuator mechanism comprising first and second wires manufactured of a shape memory alloy that shrinks when heated and configured as respective two springs, wherein the first wire is configured to move the driving members in a first direction and the second wire is configured to move the driving members in a second direction that is opposite to the first direction.
An actuator mechanism comprising:
- a wire manufactured of a shape memory alloy configured to shrink when heated, and
- driving members coupled to said wire and configured to drive members connected to the actuator mechanism, the actuator mechanism further comprising two springs, which are located at opposite ends of the wire and which are configured tighten the wire and allow the wire to turn from the first extreme position to the second extreme position and back.
A shutter mechanism comprising:
- a wire manufactured of a shape memory alloy configured to shrink when heated,
- a frame configured to support the wire and guide the wire to turn from a first extreme position to a second extreme position and back guided by the shrinking,
- two springs located at opposite ends of the wire and configured to tighten the wire and allow the wire to turn from the first extreme position to the second extreme position and back,
- a turning shutter blade, which has a first extreme position, wherein the shutter blade is configured to close an aperture, and a second extreme position, wherein the shutter blade is configured to reveal the aperture, and
- driving members configured to couple to each other the rotating wire and the turning shutter blade and to turn the shutter blade driven by the wire.
A method in an actuator mechanism, comprising:
- supporting a wire, which wire is manufactured of a shape memory alloy, into a desired shape by allowing variations in the length of said wire,
- maintaining wire tightening forces by springs, which are located at both ends of the wire,
- switching on current between one end of the wire and the center part of the wire, which current shrinks the wire, and
- moving driving members attached to the center part of the wire as a result of the shortening of the length of the wire and by maintaining one end at its place.
Apparatus, comprising:
- a support configured to support a wire, which wire is manufactured of a shape memory alloy, into the desired shape by allowing variations in the length of said wire,
- a wire tensioner configured to maintain wire tightening forces by springs, which are located at both ends of the wire,
- a switch configured to switch on current between one end of the wire and the center part of the wire, which current shrinks the wire, and
- a force member configured to move driving members attached to the center part of the wire as a result of the shortening of the length of the wire and by maintaining one end at its place.
Dependencies are inferred from the claim text.