WO2002073033A1 - Actionneur en alliage a memoire de forme - Google Patents

Actionneur en alliage a memoire de forme Download PDF

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Publication number
WO2002073033A1
WO2002073033A1 PCT/JP2002/001706 JP0201706W WO02073033A1 WO 2002073033 A1 WO2002073033 A1 WO 2002073033A1 JP 0201706 W JP0201706 W JP 0201706W WO 02073033 A1 WO02073033 A1 WO 02073033A1
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WO
WIPO (PCT)
Prior art keywords
shape memory
intermediate member
memory alloy
stable position
end member
Prior art date
Application number
PCT/JP2002/001706
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English (en)
Japanese (ja)
Inventor
Dai Homma
Original Assignee
Toki Corporation Kabushiki Kaisha
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Filing date
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Application filed by Toki Corporation Kabushiki Kaisha filed Critical Toki Corporation Kabushiki Kaisha
Publication of WO2002073033A1 publication Critical patent/WO2002073033A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
    • F03G7/00—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for
    • F03G7/06—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for using expansion or contraction of bodies due to heating, cooling, moistening, drying or the like
    • F03G7/065—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for using expansion or contraction of bodies due to heating, cooling, moistening, drying or the like using a shape memory element

Definitions

  • the present invention relates to a shape memory alloy operation that operates by the shape recovery force of a shape memory alloy.
  • the conventional shape memory alloy actuyue generally had a configuration in which when an external force acts on the operating end, the external force acts directly on the shape memory alloy through the operating end.
  • the operating end in many cases, when the operating end is moved in one direction, the operating end is driven by the shape recovery force of the shape memory alloy, while the operating end is moved in the opposite direction.
  • the actuator When the actuator is moved, the operating end is driven by the restoring force of the bias spring. Looking only at the movement of the operating end in the one direction, the operating end is driven only by the shape restoring force of the shape memory alloy.
  • the shape recovery force of a shape memory alloy given a large pre-deformation when heated is very large, exceeding the material strength of itself.
  • the shape-recovery force of a shape-memory alloy with a strain of 1% or more and restrained strain may exceed the fatigue strength or elastic limit.
  • the conventional shape memory alloy actuyue generally, as described above, When an external force is applied to the operating end, the external force acts directly on the shape memory alloy through the operating end.Therefore, the operating end is restrained during operation or unexpectedly strong external force is applied. When applied to the actuator, excessive stress was applied to the shape memory alloy, which was a major cause of performance degradation and breakage.
  • Actuyue which is a differential type equipped with two shape memory alloys that drive the operating end in opposite directions, if the cooling is not performed sufficiently, the two shape memory alloys have a strong mutual shape. He was attracted by resilience, which could cause fatal damage to the shape memory alloy.
  • the present invention has been made in view of such conventional circumstances, and one object of the present invention is to provide a shape memory alloy through an operating end, even if a force is applied to the operating end from the outside. An object of the present invention is to provide a shape memory alloy that does not act directly.
  • Another object of the present invention is to provide a shape memory alloy actuator having a high operation speed.
  • Another object of the present invention is to provide a monostable shape memory alloy actuator in which the operating end has one stable position and the position of the operating end is instantaneously inverted.
  • Another object of the present invention is to provide a differential type shape memory alloy activator, which has a shape memory alloy even if both shape memory alloys are simultaneously generating shape recovery force.
  • An object of the present invention is to provide a shape memory alloy that does not deteriorate or break.
  • the first aspect of the present invention a shape memory alloy
  • a bistable shape memory alloy actuator having an operating end having two stable positions
  • An operating end member movable between a first operating end member stable position and a second operating end member stable position; and an operating end member movable between a first intermediate member stable position and a second intermediate member stable position.
  • a shape restoring force is generated, a second shape memory alloy linked to the intermediate member so as to move the intermediate member toward the second intermediate member stable position;
  • Reversing biasing means for biasing the predetermined position of the intermediate member toward or away from each other,
  • the operation end member When the operation end member is at the first operation end member stable position, while the intermediate member is on the first intermediate member stable position side from a predetermined neutral position, the operation end member is inverted.
  • the intermediate member moves toward the second intermediate member stable position side beyond the neutral position, the operating end member is urged by the urging means toward the first operation end member stable position.
  • the reversing means While the operation end member is in the second operation end member stable position, While the intermediate member is on the second intermediate member stable position side from the predetermined neutral position, the operation end member is urged toward the second operation end member stable position by the reversing urging means.
  • the intermediate member is When the operation end member is moved to the first intermediate member stable position side beyond the neutral position, the operation end member is urged toward the first operation end member stable position by the reverse biasing means. It is configured as follows.
  • the first bistable shape memory alloy actuator when the operating end member is at the second operating end member stable position and the intermediate member is at the second intermediate member stable position, the first When the shape memory alloy is heated to a predetermined temperature range, the intermediate member is moved from the second intermediate member stable position to the first intermediate member stable position by the shape recovery force of the first shape memory alloy. However, until the intermediate member reaches the neutral position, the reversing biasing means biases the operating end member toward the second operating end member stable position, so that the operating end member is in the second operating end position. It remains stopped at the member stable position.
  • the reversing urging means urges the operation end member in the opposite direction, so that the operation end member is suddenly moved. Then, it starts moving toward the first operation end member stable position, and stops at that position when the first operation end member reaches the stable position. On the other hand, the intermediate member is stopped at the first intermediate member stable position by the biasing force of the reverse biasing means.
  • the intermediate member when the operating end member is in the first operating end member stable position, the intermediate member is in the first intermediate member stable position, and the second shape memory alloy is heated to a predetermined temperature range, the second shape memory alloy has a second shape.
  • the intermediate member is moved from the first intermediate member stable position to the second intermediate member stable position by the shape recovery force of the memory alloy.
  • the reversing biasing means urges the operating end member toward the first operating end member stable position, so that the operating end member is the first operating end member. Stopped in stable position.
  • the reversing urging means urges the operation end member in the opposite direction, so that the operation end member is suddenly moved.
  • the second operation end member starts moving toward the stable position, and the second operation end member When it reaches the stable position, it stops at that position.
  • the intermediate member is stopped at the second stable position by the biasing force of the reverse biasing means.
  • the operating end member has first and second two stable positions to heat the first or second shape memory alloy. Thereby, the stable position can be reversed.
  • the shape memory alloy actuator according to the second invention is
  • a monostable shape memory alloy actuator having an operating end having one stable position
  • An operation end member movable between the operation end member stable position and the operation end member temporary reversing position, an intermediate member movable between the intermediate member stable position and the intermediate member temporary reversing position, and a shape recovery force are generated.
  • reversing biasing means for biasing the predetermined position of the operation end member and the predetermined position of the intermediate member so as to approach or move away from each other,
  • the operation end member When the operation end member is at the operation end member stable position, while the intermediate member is on the intermediate member stable position side from a predetermined neutral position, the operation end member is controlled by the reversing biasing means. When the intermediate member is moved toward the intermediate member temporary reversing position side beyond the neutral position, the operating end member is reversed by the reversing urging means. While being biased toward the member temporary reversing position, when the operation end member is at the operation end member temporary reversing position, the intermediate member is closer to the intermediate member temporary reversing position than a predetermined neutral position.
  • the operation end member is urged toward the operation end member temporary reversing position by the reversing urging means, but the intermediate member moves beyond the neutral position to the intermediate member stable position side.
  • the reversing biasing means Moving the operating end member said operation reversed by the reversing biasing means The end member is configured to be urged toward the stable position.
  • the shape memory alloy actuator when the operation end member is at the operation end member stable position and the intermediate member is at the intermediate member stable position, the shape memory alloy is heated to a predetermined temperature range. Then, the intermediate member is moved from the intermediate member stable position to the intermediate member temporary reversal position by the shape recovery force of the shape memory alloy. However, until the intermediate member reaches the neutral position, the reversing urging means urges the operation end member toward the operation end member stable position, so that the operation end member stops at the operation end member stable position. Has been left.
  • the reversing urging means urges the operation end member in the reverse direction, so that the operation end member is suddenly operated. It starts to move toward the end member temporary reversal position, and stops at that position when it reaches the operation end member temporary reversal position. On the other hand, the intermediate member is stopped at the intermediate member temporary reversing position by the urging force of the reversing urging means.
  • the intermediate member is moved toward the intermediate member stable position against the reversing urging means, and when the intermediate member is moved to the intermediate member stable position side beyond the neutral position, the reversing urging means is operated. Since the end member is urged backward toward the operation end member stable position, the operation end member is suddenly moved by the force of the reversing urging means and returns to the operation end member stable position. The intermediate member also returns to the intermediate member stable position by the force of the intermediate member return urging means and the reverse urging means.
  • the second monostable shape memory alloy actuator of the present invention by heating the shape memory alloy, when the intermediate member exceeds the neutral position, the operating end member in the stable position is suddenly moved. Invert to the temporary inversion position, and cool the shape memory alloy Then, the operation end member returns to the original stable position.
  • the monostable shape memory alloy actuator of the first and second aspects of the present invention even when a force is applied to the operation end member from the outside, the external force is applied to the shape memory alloy through the operation end member. Has no direct effect on Therefore, an excessive stress is applied to the shape memory alloy by a force acting on the operation end member from the outside, so that the performance is not deteriorated or blasted, so that the durability can be improved.
  • the operation speed can be increased, the amount of the shape memory alloy used is reduced, and the cost is reduced. Energy consumption can be reduced and resources can be saved.
  • shape memory alloy Although a general shape memory alloy can be used as the shape memory alloy in the present invention, a more excellent effect can be obtained by using a shape memory alloy having a particularly large two-way shape memory effect. Can be.
  • the bidirectional shape memory effect is a phenomenon in which no force is required or very little force is required when deforming in the opposite direction to shape recovery at a low temperature.
  • the shape memory alloy behaves as if it remembers two shapes: a shape deformed at low temperatures and a shape recovered at high temperatures.
  • a small and unstable bidirectional shape memory effect of about 1% at maximum was obtained with a tensile strain, but the present inventor previously filed a Japanese patent application: Application 200 0—200 4 927, U.S. Patent Application: Application No. 0 9 Z 871, 6 19 and European Patent Application: Application Number 0 1 1 1 4 2 2 2.
  • a shape memory alloy having a huge two-way shape memory effect can be obtained.
  • a wire-shaped shape memory alloy that has a memory shape in the tensile direction when heated, it shrinks to the memorized length and becomes hard, but when cooled, the muscle just relaxes even when there is no load As it softens, it stretches on its own and returns to its original cold shape and length. Therefore, heating and cooling It expands and contracts without applying a bias force from the outside just by rejecting it.
  • the intermediate member is moved by the shape memory alloy that has contracted by generating a shape recovery force.
  • the shape memory alloy moves in a loosening direction without generating a resistance force, thereby facilitating the movement of the operating member.
  • the performance such as responsiveness and life are greatly improved, and a bistable differential actuator that can be operated with a small amount of shape memory alloy can be put to practical use.
  • Shape memory alloys may also be considered substantially as two-way shape memory alloys.
  • shape memory alloys have also been proposed by the present inventors in Japanese patent application: Japanese Patent Application No. 2000-20049. 27, U.S. Patent Application: Application No. 09/871, 619 and European Patent Application: Application No. 0111142422.1. BRIEF DESCRIPTION OF THE FIGURES
  • FIG. 1 is a front view showing a first embodiment of a shape memory alloy actuator according to the present invention.
  • FIG. 2 is a front view showing the first embodiment in a state where the operation end member and the intermediate member are forcibly fixed to the neutral position.
  • FIG. 3 is a cross-sectional view taken along the line III-III in FIG.
  • FIG. 4 is an operation explanatory view showing a state in which the operation end member and the intermediate member are at the second stable positions in the first embodiment.
  • FIG. 5 is an operation explanatory view showing a state in which the intermediate member has started to rotate from the state of FIG. 4 in the first embodiment.
  • FIG. 6 is an operation explanatory view showing a state in which the intermediate member has reached the neutral position from the state of FIG. 5 in the first embodiment.
  • FIG. 7 is an operation explanatory view showing a state where the intermediate member has moved beyond the neutral position from the state of FIG. 6 in the first embodiment.
  • FIG. 8 is an operation explanatory view showing a state in which the operating end member and the intermediate member are each at the first stable position in the first embodiment.
  • FIG. 9 is an operation explanatory view showing a state in which the intermediate member starts to rotate from the state of FIG. 8 in the first embodiment.
  • FIG. 10 is an operation explanatory view showing a state in which the intermediate member has reached the neutral position from the state of FIG. 9 in the first embodiment.
  • FIG. 11 is an operation explanatory view showing a state in which the intermediate member has exceeded the neutral position from the state of FIG. 10 in the first embodiment.
  • FIG. 12 is an operation explanatory view showing a state where the operating end member is rotated from one stable position to the other stable position by an external force in the first embodiment.
  • FIG. 13 is a front view showing a second embodiment of the shape memory alloy actuary according to the present invention.
  • FIG. 14 is a front view showing a third embodiment of the shape memory alloy actuator according to the present invention in a state in which the operating end member and the intermediate member are at the first stable position, respectively.
  • the shape memory alloy and the like are not shown).
  • FIG. 15 is an operation explanatory view showing a state in which the operation end member rotates in response to the rotation of the intermediate member in the third embodiment.
  • FIG. 16 is a cross-sectional view showing the third embodiment in a state where the operating end member and the intermediate member are forcibly fixed to the neutral position.
  • FIG. 17 is a plan view showing a fourth embodiment of the shape memory alloy actuator according to the present invention in a state where the operating end member and the intermediate member are each at the second stable position. It is.
  • FIG. 18 is a rear view showing the fourth embodiment.
  • FIG. 19 is an operation explanatory view showing a state where the intermediate member has reached the neutral position from the state of FIG. 17 in the fourth embodiment.
  • FIG. 20 is an operation explanatory view showing a state in which the operating end member and the intermediate member are each at the first stable position in the fourth embodiment.
  • FIG. 21 is a front view showing a fifth embodiment of the shape memory alloy actuary according to the present invention.
  • FIG. 22 is a rear view showing the fifth embodiment.
  • FIG. 23 is a cross-sectional view showing the fifth embodiment in a state where the operation end member and the intermediate member are forcibly fixed to the neutral position (the overload prevention spring is not shown). ).
  • FIG. 24 is a front view showing a state where the overload prevention switch is cut off in the fifth embodiment.
  • FIG. 25 is a front view showing a sixth embodiment of the shape memory alloy actuary according to the present invention.
  • FIG. 26 is an operation explanatory view showing a state in which one shape memory alloy is sufficiently cooled and the other shape memory alloy is heated in the sixth embodiment. '
  • FIG. 27 is an operation explanatory view showing a state where one shape memory alloy is heated while the other is not sufficiently cooled in the sixth embodiment.
  • FIG. 28 is an operation explanatory view showing a state where the first and second shape memory alloys are simultaneously heated in the sixth embodiment.
  • FIG. 29 shows the seventh embodiment of the shape memory alloy actuyue according to the present invention in a normal state. It is a front view shown in a state.
  • FIG. 30 is a front view showing the seventh embodiment in an overloaded state.
  • FIG. 31 is a front view showing an eighth embodiment of the shape memory alloy actuary according to the present invention.
  • FIG. 32 is a front view showing a ninth embodiment of the shape memory alloy actuary according to the present invention.
  • FIG. 33 is a front view showing a tenth embodiment of the shape memory alloy actuator according to the present invention in a state where the operation end member and the intermediate member are forcibly fixed to the neutral position.
  • FIG. 34 is a cross-sectional view taken along the line XXIV-XXIV in FIG.
  • FIG. 35 is an operation explanatory view showing a state where the operation end member and the intermediate member are at the stable positions in the tenth embodiment.
  • FIG. 36 is an operation explanatory view showing a state in which the intermediate member is rotated from the state of FIG. 35 to reach the neutral position in the tenth embodiment.
  • FIG. 37 is an operation explanatory view showing a state in which the operation end member and the intermediate member are each inverted to the temporary inversion position in the tenth embodiment.
  • FIG. 1 shows a state in which the operating end member 7 and the intermediate member 3 are at the respective second stable positions, as will be described in detail later.
  • FIG. 2 is referred to in correspondence with FIG. 3 (a cross-sectional view taken along the line III-III in FIG. 2), so that the configuration of the device can be easily understood.
  • Impossible condition, but forced operation end member 7 and intermediate member 3 2 shows a state in which it is fixed at the neutral position.
  • An intermediate member rotating shaft 2 is erected on the actuating body 1, and one end of a linear lever-shaped intermediate member 3 is attached to the intermediate member rotating shaft 2. It is supported rotatably around the center. Pin-shaped intermediate member stoppers 4 and 5 are fixed to the actuator body 1 at a distance from each other, and the intermediate member 3 has a rotation range corresponding to the intermediate member stopper 4 as shown in FIG. It is limited between a first intermediate member stable position in contact with the first intermediate member and a second intermediate member stable position in contact with the intermediate member stopper 5 as shown in FIGS.
  • An operating end member rotating shaft 6 is provided upright on the actuator main body 1. One end of a linear lever-shaped operating end member 7 is provided on the operating end member rotating shaft 6.
  • Pin-shaped operating end member stoppers 8 and 9 are fixed to the actuator main body 1 at a distance from each other, and the operating end member 7 contacts the stopper 8 in its rotation range as shown in FIG. It is limited between a first operating end member stable position and a second operating end member stable position that abuts on the operating end member stopper 9 as shown in FIGS.
  • the intermediate member stoppers 4 and 5 and the operating end member stoppers 8 and 9 are symmetrical. Accordingly, the first operating end member stable position, the second operating end member stable position, and the first intermediate member stable position and the second intermediate member stable position are respectively symmetrical with respect to the straight line E. Position.
  • a symmetrical arrangement is not necessarily required.
  • a pin 10 is provided upright at the other end of the intermediate member 3, and a pin 11 is provided upright at an intermediate portion of the operation end member 7.
  • Inverting biasing means 12 composed of a tension coil spring is interposed between the pin 10 and the pin 11.
  • the inverting biasing means 12 connects the pin 10 to the pin 11. They are urged in directions approaching each other.
  • the intermediate member Each part is arranged so that the rotation locus of the pin 10 (the point of application of the force of the reverse biasing means 12 to the intermediate member 3) about the rotation shaft 2 passes on the operation end member rotation shaft 6.
  • ing. 6 and 10 show a state in which the pin 10 is located on the operating end member rotation shaft 6.
  • the intermediate member 3 is provided with a winding portion 13 having a circular cross section coaxially with the intermediate member rotation shaft 2.
  • an intermediate portion of one piece of shape memory alloy 14 is fixed (15 is a shape memory alloy 1 for the wrapped portion 13). 4 are shown), and both ends of the shape memory alloy 14 are fixed to the main body 1 via pins 16 and 17, respectively.
  • the vicinity of the fixed portion 15 of the shape memory alloy 14 is wound around the wound portion 13.
  • the shape memory alloy 14 is physically in the form of a single wire, in this embodiment, the portion between the fixing portion 15 of the shape memory alloy 14 and the pin 16 is the first wire.
  • the portion between the fixed part 15 and the pin 17 constitutes a second shape memory alloy 14b.
  • a portion corresponding to the first shape memory alloy 14a and a portion corresponding to the second shape memory alloy 14b are respectively constituted by two separate wire-shaped shape memory alloys, and each shape memory is stored.
  • the end of the alloy may be fixed to the outer periphery of the winding portion 13.
  • the shape memory alloy 14 is a shape memory alloy having a huge two-way shape memory effect, has a memory shape in the linear tensile direction, and shrinks to the stored length when heated and becomes hard. On the other hand, during cooling, even under no load, the muscles soften just to relax, and stretch themselves to return to their original length and shape at low temperatures. Therefore, it expands and contracts only by heating and cooling without applying an external bias force.
  • shape memory alloys are disclosed, for example, in Japanese Patent Application No. 2000-21049, which was previously proposed by the present inventors, US Patent Application No .: Application No. 09Z871, 619, and in Europe. Patent application: can be obtained by the method disclosed in application number 0 1 1 1 4 2 2 2. You.
  • Switch means connects and disconnects the power supply (not shown) between pin 16 and fixed part 15 and between pin 17 and fixed # 5 15 independently. You can do it.
  • FIG. 4 shows the same state as FIG. 1, in which the operation end member 7 and the intermediate member 3 are respectively brought into contact with the operation end member stopper 9 and the intermediate member stopper 5 by the force of the reverse biasing means 12, It shows a state in a second operation end member stable position and a second intermediate member stable position, respectively.
  • the first shape memory alloy 14a is heated to a predetermined temperature range, and the shape memory effect increases the shape recovery force of the shape memory alloy 14a to return to the length stored by the shape memory alloy 14a against the reversing biasing means 12 by the shape memory effect. Since it is generated and shrunk, the wrapped portion 13 and, consequently, the intermediate member 3 move clockwise as indicated by the arrow A in FIGS. 5 and 6 (when the clockwise direction or the counterclockwise direction is (It should be the orientation in the figures other than Fig. 3). However, when the intermediate member 3 is in its neutral position (as shown in FIG.
  • the pin 10 (The line of action of the force of the reversing biasing means 1 2) connecting the control end member rotating shaft 6 and the pin 11 Until it reaches the point where the force of the force of the biasing means 12 is applied) and the reverse biasing means 12 biases the operating end member 7 clockwise, the operating end member 7 is in contact with the operating end member stopper 9 by the reversing biasing means 12 and remains stopped at the second stable position.
  • the switch means connects between the pin 17 and the fixed portion 15 to a power source
  • the second shape memory alloy 14 b is energized, the second shape memory alloy 14 b is heated to a predetermined temperature range, and the shape memory alloy 14 b is opposed to the reversing biasing means 12 by a shape memory effect. Since b becomes shorter to return to the memorized length, the winding portion 13 and, consequently, the intermediate member 3 rotate counterclockwise as shown by the arrow C in FIGS. 9 and 10.
  • the rotation of the operation end member 7 causes a straight line (a line of action of the force of the reverse biasing means 12) connecting the pin 10 and the pin 11 as shown in FIG.
  • the rotation is applied clockwise by the reverse biasing means 12 until then. Since the biased intermediate member 3 is urged counterclockwise, the intermediate member 3 is moved by the force of the reverse biasing means 12 (and the second shape memory alloy 14 b). It rotates counterclockwise until it comes into contact with the stopper 5, and stops at the position where it comes into contact with the intermediate member stopper 5, ie, the second stable position.
  • the operating end member 7 has two stable positions, and is heated to the first or second shape memory alloy 14 a, 14. , Its stable position can be reversed.
  • the rotation locus of the pin 10 (the point of action of the force of the reversing biasing means 12 on the intermediate member 3) about the intermediate member rotation shaft 2 is controlled. It is preferable to pass through the end member rotation shaft 6 or the vicinity thereof, so that the operation end member 7 can be moved by a very slight angle change (position change) of the intermediate member 3 near the neutral position. It can be instantly reversed to the first or second operating end member stable position.
  • the external force is applied to the first and second shape memory alloys 14a and 14b through the operating end member 7. It does not act directly. Therefore, an excessive stress is applied to the shape memory alloy by a force acting on the operation end member 7 from the outside, and the performance is not deteriorated or broken, so that the durability can be improved.
  • the operation speed can be increased, and the usage of the shape memory alloys 14a, 14b can be reduced. In addition to reducing costs and costs, it is also possible to reduce the amount of energy used and conserve resources.
  • the intermediate member 3 since the rotation locus of the point of application of the force of the reversing biasing means 12 to the intermediate member 3 is made to pass on the operating end member rotation shaft 6, the intermediate member 3 The neutral position when moving from the first intermediate member stable position to the second intermediate member stable position is the same as the neutral position when moving from the second intermediate member stable position to the first intermediate member stable position. However, if the rotation locus of the point of application of the force of the reversing biasing means 12 to the intermediate member 3 does not pass on the operating end member rotation shaft 6, the intermediate member 3 is The neutral position when moving from the position to the second intermediate member stable position may be different from the neutral position when moving from the second intermediate member stable position to the first intermediate member stable position.
  • the first and second shape memory alloys 14a and 14b require no or almost no force to deform at low temperature within the strain region where shape recovery is possible. Since the alloy is used, the shape memory alloy that is not shrunk moves in a slack direction without generating a resistance force, thereby facilitating the movement of the operation section end member. As a result, the performance such as responsiveness and life are greatly improved, and a bistable differential type actuator that can be operated with a small amount of shape memory alloy can be put into practical use. An ordinary shape memory alloy can also be used as). Further, in the first embodiment, when the operating end member 7 is rotated from one stable position to the other stable position by an external force, the intermediate member 3 is also inverted.
  • FIG. 12 illustrates this phenomenon, in which the operating end member 7 is moved from the first operating end member stable position indicated by a solid line to the second operating end member stable position indicated by a dashed line by an external force. Is rotated, the straight line connecting the pin 10 and the pin 11 (the line of action of the force of the reverse biasing means 12) is moved to the intermediate member rotation shaft 2 and the pin 10
  • FIG. 13 shows a second embodiment of the shape memory alloy according to the present invention which can prevent such a phenomenon.
  • a straight line connecting the pins 10 and 11 (reversing urging means)
  • the actuator is configured so that the line of action of the force of 12) does not exceed the straight line connecting the intermediate member rotating shaft 2 and the pin 10 (the point of action of the force of the reverse biasing means 12 on the intermediate member 3).
  • Other configurations are the same as those in the first embodiment.
  • the intermediate member 3 is not inverted, so that when the external force is eliminated, the operation end member 7 can be returned to the original stable position.
  • the operating end member 7 is moved to the first operating end member stable position indicated by a solid line by an external force.
  • the intermediate member 3 remains at the first stable position shown by the solid line even if the intermediate member 3 is turned to the second operation end member stable position shown by the one-dot chain line.
  • the end member 7 returns to the original first operation end member stable position).
  • FIG. 14 to FIG. 16 show a third embodiment of the shape memory alloy actuary according to the present invention.
  • the intermediate member rotation shaft 2 and the operation end member rotation shaft 6 are coaxial.
  • Other configurations are the same as in the first embodiment.
  • FIG. 17 to FIG. 20 show a fourth embodiment of the present invention.
  • the intermediate member 3 is configured to rotate, but in the present embodiment, the intermediate member 3 is configured to perform a sliding motion (linear movement).
  • a pin-shaped intermediate member stopper 18, 19, 20, 21 is provided upright on the actuator main body 1, and between the intermediate member stoppers 18 and 19 and By being sandwiched between 20 and 21, the intermediate member 3 is supported by the actuator main body 1 so as to be movable in a linear direction.
  • the intermediate member 3 has a movable range of a first intermediate member stable position where it comes into contact with the intermediate member stoppers 20 and 21 as shown in FIG. 20 and an intermediate member stopper 18 as shown in FIG.
  • the operating end member rotating shaft 6 One end of a linear lever-shaped operating end member 7 is rotatably supported on the operating end member rotating shaft 6 around the operating end member rotating shaft 6. I have.
  • the operating body 1 has pin-shaped operating end member stoppers 8 and 9 fixed to the main body 1 at a distance from each other, and the operating end member 7 operates the rotation range as shown in FIG. The position is limited between a first operating end member stable position in contact with the end member stopper 8 and a second operating end member stable position in contact with the operating end member stopper 9 as shown in FIG.
  • the intermediate member stoppers 18, 19 and 20 and 21 and the operating end member stoppers 8 and 9 are arranged symmetrically, the first operating end member stable position, the second operating end member stable position, the first intermediate member stable position, and the second intermediate member stable position with respect to the straight line F Each has a symmetrical position. However, also in this case, the arrangement does not necessarily have to be symmetrical.
  • a pin 10 is provided upright at the center of the intermediate member 3, and a pin 11 is provided upright at the middle of the operation end member 7.
  • Inverting biasing means 12 composed of a tension coil spring is interposed between the pin 10 and the pin 11.
  • the inverting biasing means 12 connects the pin 10 to the pin 11. They are urged in directions approaching each other.
  • Pins 22 and 23 are erected on both sides of the movable range of the intermediate member 3, and a first shape memory alloy 14a and a pin 22 are provided between the pin 22 and the intermediate member 3.
  • a second shape memory alloy 14b is passed between 23 and the intermediate member 3, respectively.
  • the first and second shape memory alloys 14a and 14b are wire-shaped shape memory alloys each having a huge two-way shape memory effect as in the above-described embodiments, and It has a memory shape in the tension direction, and when heated, it contracts to the length it remembers and becomes hard, but when cooled, it becomes soft just like a muscle relaxes, even under no load, and stretches on its own Returns to its original length and shape at low temperatures.
  • Switch means allow connection and disconnection to and from a power supply (not shown) independently.
  • FIG. 17 shows that the operating end member 7 and the intermediate member 3 are respectively brought into contact with the operating end member stopper 9 and the intermediate member stoppers 18 and 19 by the force of the reverse biasing means 12, and the second operating member
  • the state in which the end member is in the stable position and the second intermediate member is in the stable position is shown.
  • the first shape memory alloy 14a is The intermediate member 3 is heated to a predetermined temperature range and shrinks to return to the length stored in the shape memory alloy 14a against the reversing biasing means 12 due to the shape memory effect. Move in a straight line to the left as shown in Figure 9.
  • the reversing biasing means 12 which has been biasing the operating end member 7 clockwise until then, is changed to the operating end. Since the member 7 is urged in the counterclockwise direction, the operating end member 7 suddenly starts to move counterclockwise by the force of the reversing urging means 12, and the operating end member 7 is moved to the operating end member stopper 8 as shown in FIG. When it comes into contact, it stops at that position, that is, the first operation end member stable position. On the other hand, regarding the intermediate member 3, the straight line connecting the pins 10 and 11 by the movement of the operating end member 7 (the line of action of the force of the reverse biasing means 12) is perpendicular to the moving direction of the intermediate member 3.
  • FIG. 21 to FIG. 24 show a fifth embodiment of the present invention.
  • both shape memory alloys 14a and 14b simultaneously generate a shape recovery force. In such a case, the shape memory alloy may be degraded or ruptured.
  • the present embodiment is intended to prevent such inconvenience.
  • the intermediate member stoppers 4 and 5 are formed as protrusions on the actuator main body 1, and the positions at which the intermediate member 3 abuts on the intermediate member stoppers 4 and 5 are the first position and the intermediate position, respectively.
  • the second intermediate member is in the stable position.
  • the shoulders of the actuator main body 1 constitute the operation end member stoppers 8 and 9, and the stoppers 8 and 9 are located at positions where the support portions 25 provided on the operation end member 7 abut. Are the first and second operating end member stable positions, respectively.
  • the shapes of the actuator body 1, the intermediate member stoppers 4 and 5, and the operation end member stoppers 8 and 9 are changed, but the basic configuration is the same as that of the first embodiment. (The corresponding parts are indicated by the same reference numerals).
  • the main difference from the first embodiment is that a means for preventing an excessive load from being applied to the shape memory alloys 14a and 14b is provided as described below. .
  • the actuator main body 1 is provided with a slide recess 26 below the intermediate member rotating shaft 2, and a switch actuating member 27 is provided in the slide recess 26 in the figure. It is fitted so as to be able to move up and down.
  • the movement range of the switch operating member 27 is restricted by the upper end of the slide concave portion 26 and the stoppers 28 and 29 fixed to the actuator main body 1.
  • the switch operation member 27 is provided with a switch operation piece 30.
  • One ends of the first and second shape memory alloys 14a and 14b are fixed to the switch operating member 27 via pins 16 and 17 erected on the switch operating member 27, respectively. ing.
  • An overload prevention spring 32 made of a tension coil spring is interposed between the pin 60 set up on the switch operating member 27 and the pin 31 set up on the actuator main body 1.
  • the overload prevention spring 32 urges the switch operating member 27 downward, that is, in a direction away from the winding portion 13.
  • the actuator body 1 has an overload prevention switch consisting of a limit switch.
  • This overload prevention switch 33 is composed of two leaf springs 34, 35 having good electric conductivity, and two contact points 3 6 fixed to these leaf springs 34, 35 and opposed to each other. , 37, and an electrical insulator 41 provided near the tip of the leaf spring 34, and one contact 36 is fixed to the winding portion 13 of the intermediate member 3 at the fixed portion 15.
  • Fixed first and second shape memory alloys 14a, 1 are fixed to the winding portion 13 of the intermediate member 3 at the fixed portion 15.
  • the other end of 4b is electrically connected via a leaf spring 34, and the other contact 37 is electrically connected to one pole of a power supply 38 via a leaf spring 35.
  • the other pole of the power supply 38 is electrically connected to one end of the first and second drive switches 39 and 40.
  • the other end of the first drive switch 39 is electrically connected to the one end of the first shape memory alloy 14a via a pin 16
  • the other end of the second drive switch 40 is a pin. It is electrically connected to the one end of the second shape memory alloy 14 b via 17.
  • the switch when no excessive load is applied to the first and second shape memory alloys 14a and 14b, the switch is formed by the spring force of the overload prevention spring 32.
  • the h operation member 27 is moved downward and is in contact with the stoppers 28 and 29.
  • the switch operating piece 30 of the switch operating member 27 pushes down the contact 36 via the electrical insulator 41 and the leaf spring 34, and the contacts 36 and 37 are brought into contact with each other. Therefore, as shown by the solid line position in FIG.
  • the first drive When the switch 39 is turned on, the first shape memory alloy 14a is energized to heat the alloy 14a, and the alloy 14a shrinks, so that the intermediate member 3 rotates clockwise in the figure.
  • the operating end member 7 is rotated counterclockwise to reverse to the first operating end member stable position as shown by the dashed line, and the intermediate member 3 is also moved to the first intermediate position as shown by the dashed line. Rotate to the member stable position.
  • the second shape memory alloy 14b is energized to heat the alloy 14b.
  • the intermediate member 3 is rotated counterclockwise in the drawing, whereby the operating end member 7 is rotated clockwise, and the second operating end member stable position is rotated. And the intermediate member 3 also rotates to the second intermediate member stable position. In this way, when no excessive load is applied to the first and second shape memory alloys 14a and 14b, the same operation as in the first embodiment is performed.
  • either shape memory alloy is heated before one shape memory alloy is completely cooled, or both shape memory alloys 14a and 14b are heated simultaneously, so that both shape memory alloys are heated.
  • an excessive load acts on the first and / or second shape memory alloys 14a and 14b due to the state where the shape recovery force is generated at the same time, as shown in FIG. Since the operating member 27 is lifted upward in the drawing, the switch operating member 27 does not push down the contact 36 via the switch operating piece 30, the electrical insulator 41, and the leaf spring 34, so that the contact 36 And 37 are separated.
  • the first or (and) second shape The energization of the storage alloys 14a and 14b is stopped, and the shape memory alloy cools, so that the first and second shape memory alloys 14a and 14b deteriorate or deteriorate. It can be prevented from being destroyed.
  • the stoppers 28 and 29 need not always be provided, but if they are provided as in this embodiment, the upper limit of the distance between the switch operating member 27 and the winding portion 13 is set. As a result, even when an excessive load is not acting as in the case where the upper limit is not set, a certain amount of tension acts on both shape memory alloys, and the intermediate member 3 becomes stable near the center. This makes it possible to prevent the operation of the actuary from becoming unstable when it becomes easier.
  • FIG. 25 to FIG. 28 show a sixth embodiment of the present invention.
  • the intermediate member 3 is rotatable by fitting an elongated hole 42 provided in the intermediate member 3 to the intermediate member rotating shaft 2.
  • the winding portion 13 is formed in an oval shape around the elongated hole 42.
  • Other configurations are the same as those of the first embodiment of FIGS. 1 to 12 and the fifth embodiment of FIGS. 21 to 24 (corresponding components are denoted by the same reference numerals). ).
  • the intermediate member 3 rotates, As in the case of the fifth and fifth embodiments, the operation end member 7 (not shown) is inverted (in this case, the intermediate member 3 is slightly moved downward in the figure against the inversion biasing means 12,
  • the intermediate member rotation shaft 2 may move relatively to the intermediate portion of the elongated hole 42 slightly, or the intermediate member 3 does not move downward in the figure, and the rotation shaft 2 is 2 may remain biased at one end).
  • the intermediate member 3 is moved downward in the drawing against the reversing urging means 12 and the intermediate member rotating shaft 2 is relatively elongated.
  • the winding portion 13 and the opposite end of the first and second shape memory alloys 14a and 14b Since the distance between them becomes shorter to some extent, it is possible to prevent an excessive load from acting on the first and second shape memory alloys 14a and 14b.
  • the intermediate member rotating shaft 2 relatively moves toward the other end (the upper end in the figure) of the elongated hole 42 to some extent, thereby temporarily reversing the shape recovery force of the shape memory alloy. It is stored in power means 1 and 2. Thereafter, when one of the shape memory alloys cools down, the intermediate member 3 moves downward, so that at the beginning of the rotation of the intermediate member 3, the cooled shape memory alloy loosens in a direction in which the intermediate member 3 is easy to rotate ( In the case of FIG. 26 as well, if the intermediate member rotating shaft 2 is relatively slightly moved, the intermediate member 3 similarly cools and contracts at the beginning of rotation. The shape memory alloy which is not loosened in the direction in which the intermediate member 3 is easy to rotate.)
  • the intermediate member 3 is largely lowered as shown in FIG.
  • the intermediate member rotating shaft 2 largely moves toward the other end (the upper end in the figure) of the elongated hole 42, and the winding portion 13 is opposed to the first and second shape memory alloys 14a and 14b.
  • the first and second shape memory alloys 14 a, 14 It is possible to prevent an excessive load from acting on b.
  • FIG. 29 and FIG. 30 show a seventh embodiment of the present invention.
  • an overload prevention switch is further added to the configuration of the sixth embodiment shown in FIGS. 25 to 28.
  • the overload prevention switch 33 is the same as that in the fifth embodiment shown in FIGS. 21 to 24, and in a normal state, the reverse biasing means 12 (in this embodiment, The intermediate member 3 (in this embodiment, also serving as the switch operating member in the present invention) is connected via the electrical insulator 41 by the force of the present invention. Since the leaf springs 34 are pressed to bring the contacts 36 and 37 into contact with each other, the shape memory alloy 14a or 14b to be heated can be energized.
  • FIG. 31 shows an eighth embodiment of the present invention.
  • the center of the rotating member 44 is rotatably supported on a rotating member rotating shaft 43 fixed to an actuator body (not shown).
  • two pulleys 45, 46 are rotatably supported, respectively, and these pulleys 45, 46 are
  • the rotation member 43 is disposed so as to sandwich the rotation shaft 43.
  • the rotating member 44 and the pulleys 45, 46 constitute a movable contact body.
  • An overload prevention spring 32 composed of a tension coil spring is interposed between the rotating member 4 4 and the actuator main body 1.
  • the pulleys 46 and 45 are pressed against the first and second shape memory alloys 14a and 14b, and these shape memory alloys 14a and 1'4b are pressed. Is trying to stretch.
  • the stopper 66 fixed to the actuator body 1 limits the rotation range of the rotation member 44 so that the rotation member 44 cannot rotate more than a predetermined amount in the clockwise direction in the drawing.
  • the first and second shape memory alloys 14a and 14b are restricted so as not to be stretched more than a predetermined amount.
  • Other configurations are the same as those in the first embodiment (corresponding components are denoted by the same reference numerals).
  • the rotating member 44 is located at or near the position shown in FIG. 31 and the first and second shape memory alloys 14a and 14b are stretched over. In this state, the same operation as that of the first embodiment is performed. However, both shape memory alloys 14a and 14b are heated simultaneously, or the other shape memory alloy is heated before one of the shape memory alloys is sufficiently cooled.
  • the rotating member 44 is rotated counterclockwise in the figure against the overload preventing spring 32, and the first and second members are rotated. The path over which the shape memory alloys 14a and 14b are passed is shortened, and the forces acting on the first and second shape memory alloys 14a and 14b are alleviated. Is prevented.
  • FIG. 32 shows a ninth embodiment of the present invention.
  • a pair of rotating members 49 and 50 rotate on a pair of rotating member rotating shafts 47 and 48 fixed to the actuator body 1 (not shown), respectively. Supported as possible.
  • These rotating members 49, 50 are provided with partial gear portions 51, 52, and these gear portions 51 and 52 are interlocked with each other.
  • Pulleys 53 and 54 are rotatably supported by the rotating members 49 and 50, respectively.
  • the rotating members 49 and 50 and the pulleys 53 and 54 constitute a movable contact body.
  • An overload prevention spring 32 made of a tension coil spring is interposed between the rotating members 47 and 48. The spring 32 moves the rotating member 49 clockwise and the rotating member 50 counterclockwise in the drawing.
  • the stopper 55 fixed to the actuator main body 1 limits the rotation range of the rotation member 50 so that the rotation member 50 cannot rotate more than a predetermined amount in the counterclockwise direction in the drawing.
  • the first and second shape memory alloys 14a and 14b are limited so as not to be stretched beyond a predetermined amount.
  • the rotating members 49 and 50 are located at or near the position shown in FIG. 32, and the path over which the first and second shape memory alloys 14a and 14b are extended is long. In this state, the same operation as in the first embodiment is performed.
  • both shape memory alloys 14a and 14b are heated simultaneously, or when the other shape memory alloy is heated before one shape memory alloy is sufficiently cooled, the shape memory alloy 14a and 14b are heated. , 14b, the rotating member 49 is rotated counterclockwise in the figure and the rotating member 50 is rotated clockwise against the overload preventing spring 32, and The shorter the route over which the shape memory alloys 14a, 14b are passed, the less the force acting on the first and second shape memory alloys 14a, 14b, thereby preventing overload.
  • Fig. 33 to 37 show a tenth embodiment of the shape memory alloy actuator according to the present invention.
  • Fig. 33 is the same as Fig. 34 (XXX IV in Fig. 33).
  • Fig. 34 (Cross-sectional view taken along line XXXIV), in order to make the configuration of the device easily understandable, it is impossible to use it in normal use. This shows a state in which the member 3 is forcibly fixed at the neutral position.
  • This embodiment constitutes a monostable type actuator having an operation end having one stable position.
  • the second shape memory alloy in the bistable type actuator of the first embodiment is used.
  • 14 b is replaced with an intermediate member return biasing means 56.
  • an intermediate member rotating shaft 2 is provided upright on the actuator body 1, and the intermediate member rotating shaft 2 is provided with a bent portion of an L-shaped intermediate member 3. It is supported so as to be rotatable about a rotation shaft 2.
  • Pin-shaped intermediate member stoppers 4 and 5 are fixed to the work body 1 at a distance from each other, and the rotation range of the intermediate member 3 is adjusted to the intermediate member stopper 5 as shown in FIG.
  • the intermediate member is restricted between the stable position of the intermediate member and the intermediate member temporary reversing position of the intermediate member stopper 4 as shown in FIG.
  • An intermediate member return biasing means 56 composed of a tension coil spring is interposed between a pin 57 erected on one end of the intermediate member 3 and a pin 58 erected on the actuator main body 1.
  • the intermediate member return urging means 56 urges the intermediate member 3 toward the intermediate member stable position (ie, in the counterclockwise direction in FIGS. 35 to 37).
  • An operating end member rotating shaft 6 is provided upright on the actuating body 1, and one end of a linear lever-shaped operating end member 7 is provided on the operating end member rotating shaft 6. It is supported so as to be rotatable about a rotation shaft 6.
  • Pin-shaped operating end member stoppers 8 and 9 are fixed to the actuator main body 1 at a distance from each other, and the operating end member 7 has a rotating range as shown in FIG.
  • the operation end member is limited between a stable position where the operation end member contacts the member stopper 9 and a temporary reversal position where the operation end member contacts the operation end member stopper 8 as shown in FIG.
  • a pin 10 is provided upright at the other end of the intermediate member 3, and a pin 11 is provided upright at an intermediate portion of the operation end member 7.
  • Inverting biasing means 12 composed of a tension coil spring is interposed between the pin 10 and the pin 11.
  • the inverting biasing means 12 connects the pin 10 to the pin 11. They are biased in the direction of approaching each other.
  • the intermediate member 3 is provided with a winding portion 13 having a circular cross section coaxially with the intermediate member rotating shaft 2.
  • One end of a wire-shaped shape memory alloy 14 is fixed to the wrapped portion 13 (15 is a fixing portion of the shape memory alloy 14 to the wrapped portion 13).
  • the other end of the shape memory alloy 14 is fixed to the main body 1 via a pin 17.
  • the vicinity of the fixed portion 15 of the shape memory alloy 14 is wound around the wound portion 13.
  • the shape memory alloy 14 is a shape memory alloy having a huge two-way shape memory effect as in the above embodiments.
  • the connection between the pin 17 and the fixing portion 15 can be connected to and disconnected from a power supply (not shown) by switch means (not shown).
  • FIG. 35 shows a state in which the operating end member 7 and the intermediate member 3 are brought into contact with the operating end member stopper 9 and the intermediate member stopper 5 by the force of the reversing urging means 12, respectively, and are in their stable positions. Is shown.
  • the connection between the pin 17 and the fixed part 15 is connected to a power source by the switch means, and when the shape memory alloy 14 is energized, the shape memory alloy 14 is heated to a predetermined temperature range, and the shape memory alloy is heated. Due to the effect, it is piled on the reversing biasing means 12 and shrinks in order to return to the length stored in the shape memory alloy 14, so that the wrapped portion 13 and thus the intermediate member 3 are moved by the arrows in FIG. 36. It turns clockwise like. However, the intermediate member 3 is in its neutral position, that is, the straight line connecting the pins 10 and 11 (the line of action of the force of the reverse biasing means 12) as shown in FIG.
  • Axis 6 and pin 1 1 control The reverse biasing means 12 moves the operating end member 7 clockwise until it reaches a position where it is aligned with the straight line connecting the reverse biasing means 12 to the working end member 7). Since the operation end member 7 is urged, the operation end member 7 is brought into contact with the operation end member stopper 9 by the reversing urging means 12 and remains stopped at the operation end member stable position. However, when the intermediate member 3 moves beyond the neutral position in FIG. 36 in the clockwise direction, the reversing biasing means 12 that had urged the operating end member 7 in the clockwise direction until now, the operating end member 7 is reversed.
  • the intermediate member 3 crosses the straight line connecting the pin 10 and the pin 10 (the point of action of the reversing biasing means 12 on the intermediate member 3), the intermediate member 3 which has been biased counterclockwise by the reversing biasing means 12 until then. Is then urged clockwise, so that it is counterclockwise until it comes into contact with the intermediate member stopper 4 by the force of the reversing biasing means 12 (and the shape recovery force of the shape memory alloy 14).
  • the intermediate member stops at the position where it comes into contact with the intermediate member stopper 4, that is, the intermediate member temporary reversing position.
  • the intermediate member 3 and the operating end member 7 reach their respective temporary reversing positions as shown in FIG. 37, the energization of the shape memory alloy 14 is stopped, and when the shape memory alloy cools, the intermediate member returns.
  • the reversing biasing means 12 that previously urged the operating end member 7 in the counterclockwise direction now urges the operating end member 7 in the clockwise direction. It suddenly starts to move by the force of the means 12 and is rapidly rotated clockwise to return to the operation end member stable position shown in FIG.
  • the intermediate member 3 is also an intermediate member. The intermediate member is returned to the intermediate member stable position by the force of the return urging means 56 (Note that the force of the reversing urging means 12 also acts to return the intermediate member 3 to the intermediate member stable position in the middle. ).
  • the operation speed can be increased, the amount of the shape memory alloy used is reduced, and the cost is reduced. In addition, energy consumption can be reduced, and resources can be saved.
  • the intermediate member 3 is made to perform a linear motion similarly to the fourth embodiment of FIGS. 17 to 20.
  • an overload preventing means for the shape memory alloy 14 can be provided.
  • the shape memory alloy is heated by energization.
  • other types of heating such as conduction heating, heating by convection or environmental temperature, heating by infrared rays or laser, etc.
  • the shape memory alloy may be heated according to the method.
  • the reversing biasing means 12 is provided with the pins 11 and 10 installed. Assuming that the predetermined position is a predetermined position, the predetermined position of the operating end member and the predetermined position of the intermediate member are urged so as to be close to each other. A configuration may be adopted in which a predetermined location is urged away from each other.
  • the reversing urging means is constituted by a tension coil spring. It may be constituted by another kind of spring such as a spring using gas, or may be constituted by a rubber elastic body having rubber elasticity. Further, for example, a magnet (permanent magnet or electromagnet) is provided at a predetermined position of the operation end member and the intermediate member, or a magnet is provided at one of predetermined positions of the operation end member and the intermediate member, and a magnetic body is provided at the other side. May be used as the reverse biasing means.
  • the reversing biasing means may be constituted by another kind of biasing means while performing the same function.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Position Or Direction (AREA)

Abstract

L'invention concerne un actionneur actionné par des forces de recouvrement de forme d'alliages à mémoire de forme, comprenant une ou deux positions stables au niveau d'une extrémité de fonctionnement, lorsque les deux positions stables sont placées au niveau de l'extrémité de fonctionnement, un élément intermédiaire (3) est déplacé vers des première et seconde positions stables lorsque les premier et second alliages à mémoire de forme (14a, 14b) produisent des forces de recouvrement de forme, des moyens d'excitation inverse (12) destinés à exciter un élément d'extrémité de fonctionnement (7) et l'élément intermédiaire (3) de manière à déplacer leurs positions spécifiques les unes par rapport aux autres, et des moyens d'excitation excitent l'élément d'extrémité de fonctionnement (7) dans la direction inverse de la première ou de la seconde position stable en fonction de la position déplacée de l'élément intermédiaire (3) et, lorsque l'élément d'extrémité est doté d'une position stable, des moyens d'excitation destinés à exciter l'élément intermédiaire (3) sont placés au niveau d'une position stable de l'élément intermédiaire au lieu d'un alliage à mémoire de forme.
PCT/JP2002/001706 2001-03-13 2002-02-26 Actionneur en alliage a memoire de forme WO2002073033A1 (fr)

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Cited By (4)

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Publication number Priority date Publication date Assignee Title
EP1752661A1 (fr) * 2005-08-11 2007-02-14 Alfmeier Präzision Ag Baugruppen und Systemlösungen Actuateur rotatif à mémoire de forme
US20210300253A1 (en) * 2020-03-30 2021-09-30 Faurecia Interior Systems, Inc. Actuator for a vehicle compartment
US11585128B2 (en) 2019-05-29 2023-02-21 Faurecia Interior Systems, Inc. Actuator for a vehicle compartment
WO2023227213A1 (fr) * 2022-05-25 2023-11-30 mateligent GmbH Dispositif de commande thermoélastique à conception compacte

Families Citing this family (4)

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WO2005024529A2 (fr) * 2003-09-09 2005-03-17 Delphi Technologies, Inc. Dispositif de commande electrique possedant un fil musculaire intelligent
JP4846051B1 (ja) * 2010-11-05 2011-12-28 株式会社ナナオ センサユニット作動機構及び当該センサユニット作動機構を備えた液晶表示装置
KR102177953B1 (ko) * 2014-05-26 2020-11-12 엘지전자 주식회사 디스플레이 장치
JP6814245B2 (ja) * 2019-04-12 2021-01-13 エーエーシー オプティクス （チャンジョウ）カンパニーリミテッド 光学素子駆動装置、カメラ及び携帯電子機器

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JPS59206681A (ja) * 1983-05-07 1984-11-22 Shinichi Nishimura 動特性機構
JPS63309780A (ja) * 1987-06-10 1988-12-16 Nippon Denso Co Ltd 形状記憶合金アクチュエ−タ
JPH0281961A (ja) * 1988-09-19 1990-03-22 Tokieda Naomitsu バイステーブル形状記憶合金装置
JPH03168367A (ja) * 1989-11-28 1991-07-22 Toki Corp Kk 直線運動型アクチュエータ

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JPS59206681A (ja) * 1983-05-07 1984-11-22 Shinichi Nishimura 動特性機構
JPS63309780A (ja) * 1987-06-10 1988-12-16 Nippon Denso Co Ltd 形状記憶合金アクチュエ−タ
JPH0281961A (ja) * 1988-09-19 1990-03-22 Tokieda Naomitsu バイステーブル形状記憶合金装置
JPH03168367A (ja) * 1989-11-28 1991-07-22 Toki Corp Kk 直線運動型アクチュエータ

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1752661A1 (fr) * 2005-08-11 2007-02-14 Alfmeier Präzision Ag Baugruppen und Systemlösungen Actuateur rotatif à mémoire de forme
US11585128B2 (en) 2019-05-29 2023-02-21 Faurecia Interior Systems, Inc. Actuator for a vehicle compartment
US20210300253A1 (en) * 2020-03-30 2021-09-30 Faurecia Interior Systems, Inc. Actuator for a vehicle compartment
US11541820B2 (en) * 2020-03-30 2023-01-03 Faurecia Interior Systems, Inc. Actuator for a vehicle compartment
WO2023227213A1 (fr) * 2022-05-25 2023-11-30 mateligent GmbH Dispositif de commande thermoélastique à conception compacte

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