JPH02118171U

JPH02118171U -

Info

Publication number: JPH02118171U
Application number: JP2651789U
Authority: JP
Priority date: 1989-03-08
Filing date: 1989-03-08
Publication date: 1990-09-21

Description

[Brief explanation of drawings]

第１図は本考案の第１実施例によるアクチユエ
ータの側面図、第２図は同アクチユエータの平面
図、第３図は同アクチユエータに用いられるバイ
アスばねを示す平面図、第４図ａは同アクチユエ
ータに用いられる形状記憶合金ばねの変態温度以
上における形状復帰した状態を示す平面図、第４
図ｂは同形状記憶合金ばねの変態温度以下におけ
る引き伸ばされた状態を示す平面図、第５図は同
アクチユエータに用いられる電気加熱ヒータを示
す平面図、第６図は本考案の第２実施例によるア
クチユエータの側面図、第７図は同アクチユエー
タに用いられるサーモモジユールの概略断面図で
ある。図中、１０はバイアスばね、１４は形状記憶合
金ばね、２１はプリントヒータ、３１はスペーサ
、３５はボルト、３６はナツト、３７は支軸、３
８は電源、３９はスイツチ、４２はボルト、４３
はナツト、４４は支軸、４５，４６はサーモモジ
ユール、４７は直流電源、５４は熱電素子である
。 Fig. 1 is a side view of an actuator according to a first embodiment of the present invention, Fig. 2 is a plan view of the actuator, Fig. 3 is a plan view showing a bias spring used in the actuator, and Fig. 4a is the actuator. FIG. 4 is a plan view showing a shape memory alloy spring used in a shape-returning state at a temperature higher than the transformation temperature.
Fig. b is a plan view showing the shape memory alloy spring in a stretched state below its transformation temperature, Fig. 5 is a plan view showing an electric heater used in the actuator, and Fig. 6 is a second embodiment of the present invention. FIG. 7 is a side view of an actuator according to the present invention, and FIG. 7 is a schematic sectional view of a thermomodule used in the actuator. In the figure, 10 is a bias spring, 14 is a shape memory alloy spring, 21 is a print heater, 31 is a spacer, 35 is a bolt, 36 is a nut, 37 is a support shaft, 3
8 is the power supply, 39 is the switch, 42 is the volt, 43
is a nut, 44 is a support shaft, 45 and 46 are thermo modules, 47 is a DC power supply, and 54 is a thermoelectric element.

Claims

[Claims for Utility Model Registration] (1) A sheet-type shape memory alloy spring and a bias spring are stacked one on top of the other, both ends of these springs are fixed by a pair of support shafts, and the temperature of the shape memory alloy spring is raised. By performing reverse transformation, the shape memory alloy spring is contracted or expanded against the bias spring, and by lowering the temperature of the shape memory alloy spring and transforming it, the elastic force of the bias spring causes the shape memory alloy spring to return to its original state. 1. An actuator capable of returning to its original position, characterized in that an electric heating and/or cooling means is disposed near the shape memory alloy spring. (2) The actuator according to claim 1, further comprising a sheet-type electric heater arranged adjacent to the shape memory alloy spring. (3) The actuator according to claim 1, further comprising a pair of thermomodules arranged to sandwich the polymer of the shape memory alloy spring and the bias spring.