JP2014037806A - Driving device and method for manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a driving device which can easily attach a shape memory alloy member and is excellent in manufacturing operation efficiency, and to provide a method for manufacturing the driving device.SOLUTION: A driving device 1 includes shape memory alloy members 2, 2..., a base member 4 having stationary parts 3, 3, a movable member 5 which relatively moves with respect to the base member 4 in conjugation with shrinkage due to energizing of the shape memory alloy members 2, 2... and energizing means which energizes the movable member in such a direction that the shape memory alloy members 2, 2... assume a shape upon the non-energizing. Further, the driving device has pressing plate parts 20 and 21 with which surface and back surface of the stationary part 3 are respectively covered and a terminal metal fitting 6 fitted with the stationary part 3 and, therein, the shape memory alloy member 2 is configured such that an edge part base edge side 2a is arranged along the surface of the stationary part 3, an edge part top end side 2b is folded to the rear surface side via an edge surface part 14 of the stationary part 3 and arranged along the rear surface of the stationary part 3, and the edge part base edge side 2a and the edge part top end side 2b are respectively held between the stationary part 3 and the pressing plate parts 20 and 21.

Description

  The present invention relates to a drive device using a shape memory alloy and a manufacturing method thereof.

  Conventionally, a drive device that drives using a characteristic of shape memory alloy, that is, a property that contracts when heated above a certain temperature (operating temperature) even when deformed by applying force is used as a lens driving actuator of a camera. Widely used (see, for example, Patent Document 1).

  The drive device includes an insulating base member and a movable member facing the base member, and a plurality of shape memory alloy wires that contract due to heat generated when energized between the opposing surface portions are arranged in parallel. When not energized, the shape memory alloy wire is bent by being pressed by the movable member urged toward the base member by the urging means, and when energized, the movable member is interlocked with the contraction of the shape memory alloy wire. It moves relative to the direction away from the base member.

  Both ends of each shape memory alloy wire are attached to the end fixing portion of the base member by a fixing tool such as a screw or a rivet, and are connected to terminals soldered to the printed wiring board.

JP 2005-226456 A

  However, the conventional techniques as described above have a problem that the work of fixing very thin shape memory alloy wires to the base member by screwing or the like is very complicated and the work efficiency is poor.

  Further, when the shape memory alloy wire is repeatedly deformed, the stress at the time of deformation tends to concentrate on a portion fixed with a screw or the like, and there is a risk of disconnection.

  Therefore, in view of such a conventional problem, the present invention has been made for the purpose of providing a drive device that is easy to mount a shape memory alloy member and has excellent manufacturing work efficiency, and a manufacturing method thereof.

  The feature of the invention according to claim 1 for solving the conventional problems as described above and achieving the intended purpose is that a linear or belt-shaped shape memory alloy member that contracts due to heat generation when energized, and An insulating base member having a fixed portion to which an end of the shape memory alloy member is fixed, a movable member that moves relative to the base member in conjunction with contraction due to energization of the shape memory alloy member, and the movable member And a biasing means that biases the shape memory alloy member in a direction in which the shape memory alloy member is in a non-energized shape, and has a pair of pressing plate portions that are covered on the front and back surfaces of the fixed portion. A terminal metal fitting made of a conductive metal material that fits together with the fixed portion, and the shape memory alloy member has an end proximal end disposed along the surface of the fixed portion and an end distal end on the end portion Folded to the back side through the end face of the fixed part And the end base end side and the end tip end side are respectively sandwiched between the fixing portion and the pressing plate portion.

  According to a second aspect of the present invention, in addition to the configuration of the first aspect, the back-side pressing plate portion is swaged to form a locking projection.

  According to a third aspect of the present invention, in addition to the configuration of the first or second aspect, the terminal fitting is formed in a cylindrical shape or a cap shape provided with the both pressing plate portions facing each other. .

  According to a fourth aspect of the present invention, in addition to the configuration of the first, second, or third aspect, a folding guide portion having an arcuate cross section around which the shape memory alloy member is wound is provided on an end surface portion of the fixing portion. It is to be formed.

  According to a fifth aspect of the present invention, in addition to the configuration of the first to third or fourth aspects, the biasing means includes the terminal fitting made of a magnetic material, and the movable member includes a magnet, and the magnet In other words, the movable member is biased toward the base member by the attractive force between the terminal fitting and the terminal fitting.

  According to a sixth aspect of the present invention, in addition to the configuration of the first to fourth or fifth aspects, the base member and the movable member are disposed so as to face each other, and interlock with the contraction of the shape memory alloy member. Thus, the movable member moves relative to the base member in the facing direction.

  According to a seventh aspect of the invention, in addition to the configuration of the sixth aspect, the base member includes a deformation allowing portion including one or a plurality of operation concave portions on the facing surface side, and the movable member is on the facing surface side. And the shape memory alloy member is disposed between the base member and the movable member so as to cross over the deformation allowing portion, and is pressed by the motion convex portion. The shape memory alloy member that is bent in the operation recess is contracted by heat generated during energization, so that the operation protrusion is pressed and the movable member moves away from the base member. There is in doing so.

  The feature of the invention described in claim 8 is that the insulating base has a linear or belt-shaped shape memory alloy member that contracts due to heat generation when energized, and a fixing portion to which an end of the shape memory alloy member is fixed. A member, a movable member that moves relative to the base member in conjunction with contraction due to energization of the shape memory alloy member, and a bias that biases the movable member in a direction in which the shape memory alloy member forms a non-energized shape. In the manufacturing method of the drive device comprising the biasing means, the drive device includes a terminal metal fitting made of a conductive metal material having a pair of pressing plate portions that cover the front and back surfaces of the fixed portion, and the shape memory The tip end side of the alloy member is hung around the end surface portion of the fixed portion and is tensioned, and in this state, the movable member is disposed so that the shape memory alloy member forms the non-energized shape. In the fixed part And the end base end side of the shape memory alloy member is disposed along the surface of the fixed portion, the front end side of the end portion is disposed along the back surface of the fixed portion, and the end base end The side and the distal end side are to be sandwiched between the fixing part and the pressing plate part.

  According to a ninth aspect of the present invention, in addition to the configuration of the eighth aspect, after the terminal fitting is fitted to the fixed portion, the back-side pressing plate portion is crimped.

  According to a tenth aspect of the present invention, in addition to the configuration of the eighth or ninth aspect, the base member and the movable member are opposed to each other and the shape memory alloy member is disposed between the opposed surface portions. The memory alloy member has the non-energized shape when the base member and the movable member are overlapped with each other.

  According to an eleventh aspect of the invention, in addition to the configuration of the tenth aspect, the urging means includes the terminal fitting made of a magnetic material, and the movable member includes a magnet, and the magnet and the terminal fitting. The movable member is superposed on the base member by the attraction force.

  As described above, the drive device according to the present invention has a linear or belt-shaped shape memory alloy member that contracts due to heat generation when energized, and an insulating property having a fixing portion to which an end of the shape memory alloy member is fixed. A base member, a movable member that moves relative to the base member in conjunction with contraction of the shape memory alloy member by energization, and biases the movable member in a direction in which the shape memory alloy member forms a non-energized shape. And a biasing means that includes a pair of pressing plate portions that cover the front and back surfaces of the fixing portion, and is made of a conductive metal material that fits with the fixing portion. The shape memory alloy member has an end portion proximal end side disposed along the surface of the fixed portion, and an end distal end side of the shape memory alloy member is folded back to the back surface side through the end surface portion of the fixed portion. Arranged along the end proximal side and Since the front end side of each part is sandwiched between the fixing part and the pressing plate part, the end of the thin shape memory alloy member can be easily fixed to the base member and can be securely connected to the terminal. it can.

  Moreover, in this invention, a terminal metal fitting and a shape memory alloy member can be reliably connected by crimping the said back surface side pressing board part.

  Furthermore, in the present invention, the terminal fitting is formed in a cylindrical shape or a cap shape provided with the holding plate portions facing each other, so that the terminal fitting can be easily and stably fitted to the fixed portion. Can do.

  Furthermore, in the present invention, the end surface of the end portion of the shape memory member is stressed on the end surface portion of the fixed portion by forming a folded guide portion having an arcuate cross section around which the shape memory alloy member is wound. It can be folded back to the back side of the fixed part in a state where concentration is prevented.

  In the present invention, the urging means comprises the terminal fitting made of a magnetic material, the movable member includes a magnet, and the movable member is attached to the base member by an attractive force between the magnet and the terminal fitting. By being biased to the overlapping side, the movable member is in a state of being attracted to the terminal fitting by magnetic force, so that the displacement of the movable member due to energization heat generation of the shape memory alloy member is not hindered in terms of mechanical structure. It is obtained to the maximum while it does not deviate from the relative movement trajectory.

  Further, in the present invention, the base member and the movable member are disposed so as to face each other, and the movable member moves relative to the base member in the opposite direction in conjunction with the contraction of the shape memory alloy member. By doing so, it is possible to operate stably.

  In the present invention, the base member includes a deformation allowing portion including one or a plurality of operation recesses on the opposite surface side, and the movable member has an operation protrusion inserted into the operation recess on the opposite surface side. The shape memory alloy member is disposed between the base member and the movable member so as to cross over the deformation allowing portion, and is pressed by the operation convex portion to form the non-energized shape. By contracting due to energization heat generation, the movement convex portion is pressed and the movable member moves relative to the direction away from the base member, thereby utilizing the shape memory effect of the shape memory alloy member. The movable member can be preferably moved.

  In addition, as described above, the method for manufacturing a drive device according to the present invention includes a linear or belt-shaped shape memory alloy member that contracts due to heat generation when energized, and an end portion of the shape memory alloy member that is fixed. An insulating base member having a portion, a movable member that moves relative to the base member in conjunction with contraction due to energization of the shape memory alloy member, and the shape of the movable member when the shape memory alloy member is not energized. In the manufacturing method of the drive device comprising the biasing means for biasing in the forming direction, the drive device is a terminal made of a conductive metal material having a pair of pressing plate portions that cover the front and back surfaces of the fixed portion. A metal fitting is provided, and the distal end side of the shape memory alloy member is hung around the end surface portion of the fixed portion and is tensioned, and in this state, the movable member is arranged so that the shape memory alloy member forms the non-energized shape. Before and after A terminal metal fitting is fitted into the fixing portion, and the base end side of the end portion of the shape memory alloy member is arranged along the surface of the fixing portion, and the tip end side of the end portion is arranged along the back surface of the fixing portion. In addition, a very thin shape memory alloy member is suitably formed into a non-energized shape by sandwiching the end base end side and the end tip end side between the fixing portion and the pressing plate portion, respectively. In addition, the end portion can be easily fixed to the base member.

  In this invention, after fitting the said terminal metal fitting to the said fixing | fixed part, the edge part of a shape memory alloy member can be reliably connected to a terminal metal fitting by crimping the said back surface side pressing board part.

  Furthermore, in the present invention, the base member and the movable member are opposed to each other and the shape memory alloy member is disposed between the opposed surface portions, and the base member and the movable member overlap each other. By forming the non-energized shape when it is formed, the shape memory alloy member can be deformed to the non-energized shape while maintaining the tensioned state.

  Still further, in the present invention, the urging means comprises the terminal fitting made of a magnetic material, the movable member includes a magnet, and the movable member is attached to the base member by an attractive force between the magnet and the terminal fitting. The movable member can be integrated with the base member by being superposed on each other, and can be easily transported and mounted on an electronic device.

It is a perspective view which shows an example of the drive device which concerns on this invention. It is the perspective view seen from the lower side same as the above. It is an exploded perspective view same as the above. It is a longitudinal cross-sectional view of the drive device same as the above. It is a perspective view which shows the base member in FIG. It is a partial expanded sectional view which shows the fixing | fixed part part in FIG. It is a perspective view which shows the terminal metal fitting in FIG. It is a perspective view which shows the movable member in FIG. It is a longitudinal cross-sectional view which shows another example of a movable member same as the above. (A) is a side view which shows the state at the time of the de-energization of the drive device which concerns on this invention, (b) is a side view which shows the state at the time of the same energization. (A)-(d) is a side view which shows the state of each process in the manufacturing method of the drive device which concerns on this invention.

  Next, an embodiment of the drive device according to the present invention will be described based on the embodiments shown in FIGS. In the figure, reference numeral 1 denotes a driving device, and reference numeral A denotes a printed wiring board on which the driving device 1 is mounted.

  The drive device 1 includes a linear shape memory alloy member 2, 2... And an insulating base member 4 having a fixing portion 3 to which ends of the shape memory alloy members 2, 2. When the shape memory alloy members 2, 2... Are not energized, the movable member 5 moves relative to the base member 4 in conjunction with the contraction of the shape memory alloy members 2, 2. Biasing means for biasing in the direction of forming the shape.

  The drive device 1 also includes terminal fittings 6 and 6 that fit together with the fixed portion 3, and the bottom surface of the terminal fitting 6 is connected to the connection pattern Aa of the printed wiring board A by soldering or the like. The driven body fixed to the wiring board A and electrically connected thereto is driven by the relative movement of the movable member 5 with respect to the base member 4 so as to be integrated or integrated with the movable member 5.

  The shape memory alloy members 2, 2... Are formed into a linear shape by an alloy exhibiting a shape memory effect, such as a nickel-titanium alloy, that is, a shape memory alloy, and contract by heat generation when energized even when deformed at room temperature. Then, it is designed to restore the original shape.

  As shown in FIG. 5, the base member 4 is formed into an elongated plate shape using an insulating material or a material provided with an insulating coating, and has a flat plate-like fixing portion 3 that protrudes outward in the longitudinal direction from the end surface of the main body at both longitudinal ends. , 3 are provided.

  Further, on the surface side of the base member 4, an operation allowing portion 11 including one or a plurality of operation recesses 10, 10... Is provided, and the plurality of shape memory alloy members 2, 2. 11 is arranged in the direction between the fixed portions 3 and 3 so as to traverse 11, and both ends thereof are fixed to the fixed portion 3 by terminal fittings 6.

  The operation allowing portion 11 is formed in a side view corrugated shape including a plurality of side view mountain-shaped support portions 12 and 12 projecting to one side of the base member 4, and the corrugated valley portion is an operation concave portion. 10, 10...

  In addition, the top part of the support part 12 is formed in a circular arc shape when viewed from the side, and has guide grooves 13, 13... Oriented in the longitudinal direction of the base member in accordance with the positions of the shape memory alloy members 2, 2. They are formed in parallel to each other.

  The fixing portion 3 is formed in a flat plate shape, and as shown in FIG. 6, the end portion base end side 2 a of each shape memory alloy member 2, 2... Is arranged along the surface of the fixing portion 3. The end tip side 2b is folded back to the back side through the end face part of the fixed part 3 and arranged along the back side, and the terminal metal fitting 6 is fitted on the outside thereof, thereby each shape memory alloy member 2, 2 ... The end of is fixed.

  Further, a plurality of folding guide portions 14, 14... Having a circular arc cross section are formed on the end surface portion of the fixed portion 3 so as to form a comb shape. Each of the folding guide portions 14 has a shape memory alloy member 2, 2 ..., the tip end side of the end portion is folded back to the back side of the fixed portion 3 without concentrating stress on one point.

  As shown in FIG. 6, each folding guide portion 14 is formed in a groove shape in the end surface portion of the fixing portion 3 in the direction between the front and back surfaces, and the groove bottom portion has an arc shape. The shape memory alloy members 2, 2... Are passed through the folding guide portions 14 to prevent stress concentration, and the shape memory alloy members 2, 2. It is like that.

  Further, the back surface of the fixing portion 3 is arranged to form a step with the bottom surface of the base member 4 main body, and the bottom surface of the terminal metal fitting 6 fitted into the fixing portion 3 by forming the step portion 15, that is, the board connection surface. Are arranged in the same plane as the bottom surface 4a of the base member 4 main body.

  As shown in FIG. 7, the terminal fitting 6 is formed in a shape having a pair of holding plate portions 20 and 21 which are arranged opposite to each other and are electrically connected to each other, and the holding plate portion 21 on the bottom surface, that is, the back surface side is soldered. It is connected to the connection pattern Aa of the printed wiring board A by attaching or the like.

  The terminal fitting 6 is integrally formed by drawing a conductive metal material that is also a magnetic body, and a pair of pressing plate portions 20 and 21 facing each other and between both side edges of the pressing plate portions 20 and 21. A pair of side plate portions 22, 22 arranged to be connected forms a rectangular tube shape, and one end of the rectangular tube shape is closed by an end plate portion 23 and is formed in a cap shape having one end opened.

  Then, by fitting the terminal metal fitting 6 to the fixing portion 3, the pressing plate portions 20 and 21 are respectively covered on the front and back surfaces of the fixing portion 3, and between the pressing plate portions 20 and 21 and the fixing portion 3. The shape memory alloy members 2, 2... Are sandwiched between the ends of the shape memory alloy members 2, 2. ing.

  The opening inner edge 6a of the terminal fitting 6 is formed so as to have a circular arc cross section, and prevents stress from being concentrated when the shape memory alloy members 2, 2.

  Further, a caulking groove 24 is formed on the back surface of the fixed portion 3 in a direction intersecting with the longitudinal direction of the base member 4, and as shown in FIG. In addition, a locking projection 25 is formed by caulking the pressing plate 21 on the back surface side, and the ends of the shape memory alloy members 2, 2. And the shape memory alloy members 2, 2... Are secured.

  The end plate portion 23 is formed with insertion holes 26, 26 penetrating in the thickness direction, and the insertion holes 26, 26 play a role of venting air when the terminal fitting 6 is fitted into the fixing portion 3. It has become.

  On the other hand, the movable member 5 is disposed so as to face the base member 4 and moves relative to the base member 4 in the opposite direction in conjunction with the contraction of the shape memory alloy members 2, 2. It has become.

  The movable member 5 includes operation convex portions 30, 30 ... each having a mountain shape in a side view inserted into the operation concave portions 10, 10 ... of the base member 4 on the opposite surface side, and is attached by an urging means. When the movable member 5 is superposed on the base member 4, the operation convex portions 30, 30... Are fitted into the operation concave portions 10, 10. The shape memory alloy members 2, 2... Arranged between the opposing surface portions are deformed into a corrugated shape in accordance with the fitting surface shape of the operation convex portions 30, 30.

  Further, the movable member 5 is formed with flat portions 31 and 31 having at least opposite surfaces formed flat at both ends, and is flattened when the movable member 5 is superimposed on the base member 4 by being biased by the biasing means. The portions 31, 31 come into contact with the surface of the terminal fitting 6, that is, the front side holding plate portions 20, 21 in an overlapping arrangement.

  The biasing means includes a magnet portion on the movable member 5 and is biased to the side where the movable member 5 overlaps the base member 4 by the attractive force between the magnet portion and the terminal fitting 6 that is a magnetic body. .

  The movable member 5 may be provided with a magnet portion by configuring the entire movable member 5 with a ferrite magnet or the like. Also, as shown in FIG. 9, a magnet 32 is provided on each flat portion 31, 31 of the movable member 5. , 32 may be embedded.

  In the drive device 1 configured as described above, as shown in FIG. 10 (a), the energizing means, that is, the movable member 5 and the terminal metal fitting 6 are attracted by the magnetic force m of the magnet and moved when not energized. The member 5 is overlapped with the base member 4, and the operation convex portions 30, 30... Are inserted into the operation concave portions 10, 10. Are in contact with each shape memory alloy member 2, 2 ..., and each shape memory alloy member 2, 2 ... is deformed into a corrugated shape (non-energized shape).

  When the drive device 1 is energized, that is, a voltage is generated between the terminal fittings 6 and 6 and a current is passed through the shape memory alloy members 2, 2..., The shape memory alloy members 2, 2. As shown in FIG. 10 (b), the memory effect, that is, contraction due to energization heat generation, as shown in FIG. The position is displaced to the movable member side, and in conjunction with this, the shape memory alloy members 2, 2... Are pushed up through the operation convex portions 30, 30. The movable member 5 moves relative to the base member 4 in a direction away from the base member 4 against the magnetic force m with the magnetic terminal fitting 6.

  At that time, since the movable member 5 is attracted to the terminal fitting 6 by the magnetic force m, the displacement of the movable member 5 due to the energization heat generation of the shape memory alloy members 2, 2. On the other hand, it does not deviate from the relative movement trajectory.

  When the voltage applied between the terminal fittings 6 is removed, the movable member 5 is urged by the urging force of the urging means, that is, the attracting force m between the magnet 2 and the terminal fitting 6 as shown in FIG. Returning to the original position shown, that is, the position where the movable member 5 is superimposed on the base member 4, the operation convex portions 30, 30... Are inserted into the operation concave portions 10, 10. Each of the shape memory alloy members 2, 2... Is deformed into a corrugated shape (non-energized shape) by being pressed by the portions 30, 30.

  Next, the manufacturing method of the drive device according to the present invention will be described with reference to FIG. In addition, the same code | symbol is attached | subjected to the structure similar to the above-mentioned Example, and description is abbreviate | omitted.

  In order to manufacture the drive device 1, as shown in FIG. 11A, first, the base member 4 is installed with the front side, that is, the side on which the operation allowing portion 11 is formed, and each shape memory alloy is placed there. The members 2, 2... Are disposed so as to cross the operation allowing portion 11 in parallel with each other through the guide grooves 13 of the support portions 12, 12, and further, both the shape memory alloy members 2, 2. The distal end side 2b is hung around a folding guide portion 14 having an arcuate cross section formed on the end surface portion of the fixed portion 3, and is tensioned by applying a downward tension t.

  At that time, each of the shape memory alloy members 2, 2... Has a tension t that is optimal for manufacturing, that is, both fixing portions 3, 3 by interposing a tension device (not shown) at one or both of the tip ends. The tension is adjusted so as not to break, while allowing a constant load acting in the tension direction and not breaking.

  Next, as shown in FIG. 11 (b), the movable member 5 is brought closer to and overlapped from one side of the base member 4, and the movable member 5 is shaped so that each shape memory alloy member 2, 2. Arrange to form.

  That is, by arranging the movable member 5 so as to overlap the base member 4, the operation convex portions 30, 30... Come into contact with the shape memory alloy members 2, 2. .Press inward.

  At that time, since each shape memory alloy member 2, 2 ... is in a tensioned state, when it is pressed by the operation convex portions 30, 30 ..., a load in the tensile direction acts and follows the waveform. And deformed so as to extend to form a non-energized shape.

  Then, while maintaining the state in which the movable member 5 is superposed on the base member 4, the terminal fittings 6 and 6 are brought closer to the outside in the longitudinal direction of the base member 4 as shown in FIG. Combine.

  When the terminal metal fitting 6 is fitted into the fixing portion 3, the shape memory alloy members 2, 2... Are wound around the end face portion and are in a tensioned state, so that the terminal metal fitting 6 advances in the fitting direction. Guided by the opening inner edge 7a of each pressing plate portion 20, 21, the proximal end 2a of the end portion extends along the surface of the fixing portion 3 and is sandwiched between the surface of the fixing portion 3 and the pressing plate portion 20, and similarly The end front end side 2 b extends along the back surface of the fixed portion 3 and is sandwiched between the back surface of the fixed portion 3 and the pressing plate portion 21.

  Then, when the terminal fitting 6 is completely fitted to the fixing portion 3, the end base end side 2a of the shape memory alloy members 2, 2. The tip end side 2b is arranged along the back surface of the fixing portion 3, and the end base end side 2a and the end tip end side 2b are sandwiched between the fixing portion 3 and the holding plate portions 20, 21, respectively. The end portions of the memory alloy members 2, 2... Are fixed to the fixing portion 3 and connected to the terminal fitting 6.

  Further, the terminal fitting 6 and the movable member 5 are attracted by the magnetic force m, and the movable member 5 is superposed on the base member 4, that is, in a position where the shape memory alloy members 2, 2. Retained.

  Next, as shown in FIG. 11 (d), the tip portions 2 b of the shape memory alloy members 2, 2... Exposed on the back surface of the fixing portion 3 are cut using the step portion 15. At this time, since the step portion 15 is formed between the bottom surface of the base member 4 main body and the back surface of the fixed portion 3, the cut portions of the shape memory alloy members 2, 2. It can be cut so that it does not interfere with the bottom surface.

  Finally, in accordance with the position of the caulking groove 24, the back-side holding plate portion 21 is caulked from the lower surface side to fix the terminal fitting 6 to the fixing portion 3, and the ends of the shape memory alloy members 2, 2,. The tip end side of the part and the terminal fitting 6 are securely connected to complete the assembly.

  In the above-described embodiment, the base member and the movable member are opposed to each other, the shape memory alloy member is disposed between the opposing surface portions, and the movable member is linked to the contraction of the shape memory alloy member due to energization heat generation. The structure that moves in a direction away from the member has been described, but the present invention is not limited to such a structure, and the base member includes a fixing portion, and the fixing member uses the terminal fitting as described above. Any structure that fixes the end of the shape memory alloy member may be used.

  For example, the base member and the movable member are opposed to each other, the shape memory alloy member is bridged on the upper surface side of the movable member, and both ends thereof are fixed to the fixing portion of the base member using terminal fittings. The structure etc. which were provided with the urging | biasing means urged | biased in the direction away from a member, and moved the movable member to the base member side by the shrinkage | contraction accompanying the electricity_generation | heat_generation of a shape memory alloy member may be sufficient.

  Further, in the above-described embodiment, the example in which the terminal fitting is formed in a cap shape with one end opened is described, but other shapes including a pair of pressing plate portions facing each other such as a U-shape in a side view are provided. Also good.

  Furthermore, in the above-described embodiment, an example in which a plurality of shape memory alloy members are provided in parallel with each other has been described, but one shape memory alloy member may be provided. In the above-described embodiments, the shape memory alloy member has been described as being linear.

m Magnetic force t Tension
A Printed wiring board 1 Drive device 2 Shape memory alloy member 3 Fixed portion 4 Base member 5 Movable member 6 Terminal fitting 10 Operation recess 11 Operation allowance portion 12 Support portion 13 Guide groove 14 Folding guide portion 15 Step portion 20 Pressing plate portion 21 Back surface Side presser plate portion 22 Side plate portion 23 End plate portion 24 Caulking groove 25 Locking projection portion 26 Insertion hole 30 Operation convex portion 31 Flat portion 32 Magnet

Claims (11)

By a linear or belt-shaped shape memory alloy member that contracts due to heat generation when energized, an insulating base member having a fixing portion to which an end of the shape memory alloy member is fixed, and energization of the shape memory alloy member A drive device comprising: a movable member that moves relative to the base member in conjunction with contraction; and an urging means that urges the movable member in a direction in which the shape memory alloy member forms a non-energized shape. And
It has a pair of pressing plate parts that are put on the front and back surfaces of the fixed part, and comprises a terminal metal fitting made of a conductive metal material that fits with the fixed part,
The shape memory alloy member is arranged along the back surface with the base end side of the end portion being arranged along the surface of the fixing portion and the tip end side of the end portion being folded back to the back surface side through the end surface portion of the fixing portion. The drive device according to claim 1, wherein the base end side of the end portion and the tip end side of the end portion are sandwiched between the fixing portion and the pressing plate portion, respectively.   The drive device according to claim 1, wherein a locking projection is formed by caulking the pressing plate on the back side.   3. The drive device according to claim 1, wherein the terminal fitting is formed in a cylindrical shape or a cap shape provided with the both pressing plate portions facing each other.   4. The drive device according to claim 1, wherein a folding guide portion having an arcuate cross section around which the shape memory alloy member is wound is formed on an end surface portion of the fixed portion.   The biasing means comprises the terminal fitting made of a magnetic material, the movable member is provided with a magnet, and the movable member is biased to the base member side by an attractive force between the magnet and the terminal fitting. The drive device according to claim 1, wherein the drive device is formed as described above.   The base member and the movable member are arranged so as to face each other, and the movable member moves relative to the base member in the opposite direction in conjunction with contraction of the shape memory alloy member. Item 6. The driving device according to Item 1 to 4 or 5. The base member includes a deformation allowing portion including one or a plurality of operation recesses on the opposite surface side, and the movable member includes an operation protrusion inserted into the operation recess on the opposite surface side,
The shape memory in which the shape memory alloy member is disposed between the base member and the movable member so as to cross the deformation allowing portion, and is pressed by the operation convex portion and is bent in the operation concave portion. The drive device according to claim 6, wherein the alloy member contracts due to heat generation during energization, whereby the operation convex portion is pressed and the movable member moves relative to a direction away from the base member. By a linear or belt-shaped shape memory alloy member that contracts due to heat generation when energized, an insulating base member having a fixing portion to which an end of the shape memory alloy member is fixed, and energization of the shape memory alloy member Manufacture of a driving device comprising: a movable member that moves relative to the base member in conjunction with contraction; and an urging means that urges the movable member in a direction in which the shape memory alloy member forms a non-energized shape. In the method
The drive device includes a terminal metal fitting made of a conductive metal material having a pair of pressing plate portions that are put on the front and back surfaces of the fixed portion,
The tip end side of the shape memory alloy member is hung around the end surface portion of the fixed portion and is tensioned, and in this state, the movable member is arranged so that the shape memory alloy member forms the non-energized shape, and then the terminal A fitting is fitted to the fixed part, and the end base end side of the shape memory alloy member is arranged along the surface of the fixed part, and the tip end side is arranged along the back surface of the fixed part, And the manufacturing method of the drive device characterized by clamping the said edge part base end side and an edge part front end side between the said fixing | fixed part and a pressing board part, respectively.   The method for manufacturing a drive device according to claim 8, wherein the back-side pressing plate portion is crimped after the terminal fitting is fitted to the fixing portion.   The base member and the movable member face each other, and the shape memory alloy member is disposed between the opposing surface portions. The manufacturing method of the drive device according to claim 8 or 9, wherein the shape is formed when energized.   The biasing means comprises the terminal fitting made of a magnetic material, the movable member is provided with a magnet, and the movable member is superposed on the base member by an attractive force between the magnet and the terminal fitting. The manufacturing method of the drive device of description.

Images