JP2016145582A - Drive unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drive unit which can easily assemble a shape memory alloy wire rod into a base member or the like.SOLUTION: A drive unit comprises a flat shape memory cable body 7 in which shape memory alloy wire rods 2, 2 ... are supported to a flat support base material 8 having flexibility, and electrode connection exposure parts 9, 9 in which ends of the shape memory alloy wire rods 2, 2 are exposed at an end of the support base material 8 are formed. A pair of pressing plate parts 20, 21 which are covered on front and rear surfaces of a fixed part 3 formed at a base member 4 are arranged at terminal members 6, 6, a tip side 2b of an end of the shape memory alloy wire rod which is arranged along the rear surface of the fixed part 3 is sandwiched between the fixed part 3 and the pressing plate part 21, and the electrode connection exposure part 9 is connected to the terminal member 6.SELECTED DRAWING: Figure 9

Description

  The present invention relates to a drive device used for a drive actuator or the like using the characteristics of a shape memory alloy.

  2. Description of the Related Art Conventionally, a driving device that uses a characteristic of a shape memory alloy, that is, a characteristic that contracts when heated to a certain temperature (operating temperature) or more by energization is widely used for a lens driving actuator or the like of a camera ( For example, see Patent Document 1).

  This 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. When energized, the movable member is interlocked with the contraction of the shape memory alloy wire. Relative movement is performed in a direction away from the base member, and a drive target integrated or integrated with the movable member is driven.

  Each shape memory alloy wire has its both ends attached to the end fixing part of the base member with a fixing tool such as a screw or a rivet and connected to a terminal soldered to the printed wiring board for each wire. Yes.

JP 2005-226456 A

  However, in the conventional technology as described above, the shape memory alloy wire is very thin, and both ends are fixed to the base member (electrode) for each shape memory alloy wire. In addition, it is very difficult to dispose each shape memory alloy wire in a uniform curved state, such as the slackness of each shape memory alloy wire being different, and the disposition of each shape memory alloy wire is also difficult. There is a problem that it is difficult to ensure a certain quality, for example, the movement of the movable member is not stable due to the difference.

  Further, in the manufacturing process of such a drive device, it takes a lot of time to attach each shape memory alloy wire to the base member, while on the other hand, attach a plurality of shape memory alloy wires to the base member at the same time. As a result, the shape memory alloy wires may be entangled with each other, and workability is extremely poor.

  Therefore, in view of such a conventional problem, the present invention has been made for the purpose of providing a drive device in which a shape memory alloy wire can be easily incorporated into a base member or the like.

  The feature of the invention according to claim 1 for solving the conventional problem as described above is that a shape memory alloy wire that contracts due to heat generation when energized and a terminal member to which an end of the shape memory alloy wire is connected A base member having a fixing portion into which the terminal member is fitted, a movable member that operates in conjunction with contraction of the shape memory alloy wire during energization heat generation, and the movable member when the shape memory alloy wire is not energized And a biasing means for biasing in the direction of forming the shape, wherein the shape memory alloy wire is supported by a flat support substrate having insulation and flexibility, and A pair of flat shape memory cable bodies, each having an exposed portion for electrode connection in which an end portion of the shape memory alloy wire is exposed at an end portion, are covered on the front and back surfaces of the fixing portion. A holding plate portion, and the back of the fixing portion A driving device in which a tip end side of the end portion of the shape memory alloy wire disposed along the surface is sandwiched between the fixing portion and the pressing plate portion, and the electrode connection exposed portion is connected to the terminal member. It is in.

  A feature of the invention described in claim 2 is that, in addition to the configuration of claim 1, a plurality of shape memory alloy wires are supported on the supporting base material in a parallel arrangement spaced apart from each other.

  According to a third aspect of the present invention, in addition to the configuration of the first or second aspect, a tip fixing portion to which a tip of the exposed shape memory alloy wire end is fixed to the electrode connecting exposed portion is provided. It is in.

  The feature of the invention of claim 4 is that, in addition to the configuration of claim 3, the tip fixing portion is made to support the tips of the end portions of the plurality of shape memory alloy wires in a parallel arrangement spaced apart from each other. .

  According to a fifth aspect of the present invention, in addition to the configuration of any one of the first to fourth aspects, the base member and the movable member are arranged to face each other, and the base member And the movable member includes a movement convex portion inserted into the movement concave portion on the opposite surface side, and the flat shape memory cable body is connected to the base member. The flat shape memory cable body, which is arranged so as to cross over the deformation allowing portion between the movable member and pressed in the operation convex portion and bent in the operation concave portion, is caused by the heat generated by energization. The shape memory alloy wire is deformed by contraction, and the movement convex portion is pressed against the flat shape memory cable body so that the movable member moves relative to the base member in a direction away from the base member.

  As described above, the driving device according to the present invention includes a shape memory alloy wire that contracts due to heat generation when energized, a terminal member to which an end of the shape memory alloy wire is connected, and a fixing into which the terminal member is fitted. A base member having a portion, a movable member that operates in conjunction with contraction of the shape memory alloy wire when energized and heated, and biases the movable member in a direction that forms the shape when the shape memory alloy wire is not energized. In the drive device comprising the urging means, the shape memory alloy wire is supported by a flat support substrate having insulation and flexibility, and the shape memory alloy wire of the shape memory alloy wire is attached to an end of the support substrate. A flat shape memory cable body in which an exposed portion for electrode connection with an exposed end portion is formed, and the terminal member includes a pair of pressing plate portions that cover both front and back surfaces of the fixing portion, and the fixing Arranged along the back of the part The shape memory alloy wire rod is formed as a base member by sandwiching the tip side of the end portion of the shape memory alloy wire rod between the fixing portion and the holding plate portion and connecting the exposed portion for electrode connection to the terminal member. Can be easily incorporated into. In addition, abnormal noise such as wind noise of each shape memory alloy wire generated due to contraction due to heat generation during energization can be suppressed, and a suitable operation sound can be obtained.

  Further, in the present invention, a plurality of shape memory alloy wires are supported on the support base material in a parallel arrangement spaced apart from each other, so that each shape memory alloy wire is not entangled during assembly. In addition, it is possible to easily incorporate a plurality of shape memory alloy wires into the base member, thereby improving work efficiency and reducing manufacturing costs. Furthermore, since the state of each shape memory alloy wire is kept uniform, stable quality can be ensured.

  Furthermore, in the present invention, the electrode connection exposed portion is provided with a tip fixing portion to which the tip of the exposed shape memory alloy wire end is fixed, so that positioning with respect to the base member can be performed using the tip fixing portion. This can be suitably performed, and the working efficiency can be improved. In addition, by bringing the pressing plate portion into contact with the tip fixing portion, the end portion of the shape memory alloy wire exposed from the electrode connecting exposed portion can be suitably tensioned and connected to the terminal member in a stable state.

  Furthermore, in the present invention, a portion connected to a terminal of each shape memory alloy wire by supporting the tips of a plurality of shape memory alloy wire ends in a parallel arrangement spaced apart from each other on the tip fixing portion. Can be prevented from being entangled with each other, and the workability of the assembly work can be improved.

  Further, in the present invention, the base member and the movable member are disposed so as to face each other, 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 An operation convex portion inserted into the operation concave portion on the opposite surface side, and the flat shape memory cable body is disposed between the base member and the movable member so as to cross over the deformation allowing portion, The flat shape memory cable body in a state of being pressed in the operation convex portion and bent in the operation concave portion is deformed by contraction of each shape memory alloy wire due to heat generation during energization, and the flat shape memory cable body Since the movement convex portion is pressed and the movable member is relatively moved in the direction away from the base member, the shape of each shape memory alloy wire is uniform, so that the movable member operates stably. Door can be.

It is a perspective view which shows an example of the flat shape memory cable body used for this invention. It is a perspective view which shows the state changed same as the above. It is the AA line partial expanded sectional view in FIG. FIG. 3 is a partially enlarged longitudinal sectional view in FIG. 2. It is a perspective view which shows the other embodiment of the flat shape memory cable body same as the above. (A), (b) is a perspective view which shows the other Example of the flat shape memory | storage cable body which concerns on this invention, Comprising: It is a perspective view which shows what the exposed part for electrode connection of a different aspect was formed, respectively. is there. It is a perspective view which shows an example of the drive device using the flat shape memory cable body which concerns on this invention. It is a perspective view which shows the state seen from the bottom same as the above. It is an exploded perspective view same as the above. It is a partial expanded sectional view which shows the terminal connection state of the flat shape memory cable body same as the above. It is a perspective view which shows the terminal member in FIG. (A), (b) is a front view for demonstrating the operation state of a drive device. It is a partial expanded sectional view which shows another example of the terminal connection state of a flat shape memory cable body same as the above.

  Next, an embodiment of the flat shape memory cable body used in the drive device according to the present invention will be described based on the embodiments shown in FIGS. In the figure, reference numeral 7 denotes a flat shape memory cable body having a plurality of shape memory alloy wires 2, 2.

  As shown in FIG. 1, the flat shape memory cable body 7 has a plurality of shape memory alloy wires 2, 2... And each shape memory alloy wire 2, 2. A support base material 8 to be supported, and electrode connection exposed portions 9 and 9 are formed at both ends of the support base material 8 so as to expose the end portions of the shape memory alloy wires 2, 2. It has become.

  This flat shape memory cable body 7 applies current to each shape memory alloy wire 2, 2... From both ends of each shape memory alloy wire 2, 2. When flowed, the shape memory alloy wires 2, 2... Shrink due to the shape memory effect, that is, heat generation during energization, the support base material 8 deforms following the shape memory effect, and the entire flat shape memory cable body 7 deforms. It has become.

  Shape memory alloy wires 2, 2 ... are formed of a shape memory alloy such as a nickel-titanium alloy, ie, a shape memory alloy, and shrink due to heat generated when energized even if deformed at room temperature. It is supposed to be.

  The support base 8 is formed in a flat shape by a material having flexibility, insulation, and heat resistance such as polyimide, and supports the shape memory alloy wires 2, 2. In addition, the outer peripheral surface of each shape memory alloy wire 2, 2... Is covered.

  The support base 8 is formed, for example, by superposing a pair of thin and thin tape-like members 8a and 8a made of polyimide, and an adhesive material or heat-sealing is performed on the opposing surface portion of each tape-like member 8a and 8a. The shape memory alloy wires 2, 2... Are fixed to a parallel arrangement spaced apart from each other by bonding the tape-like members 8 a, 8 a together with an adhesive material or heat fusion. The tape-like members 8a and 8a are sandwiched in a parallel arrangement spaced apart from each other.

  Each shape memory alloy wire 2, 2... Is directed in the same direction as the longitudinal direction of the support base 8 on the support base 8, that is, the opposing surface portion of each tape-like member 8 a, 8 a, and has no slack. As shown in FIG. 2, when the support base material 8 is deformed when not energized, the shape memory alloy wires 2, 2... Are supported following the deformation of the support base material 8. The portion fixed to the base material 8 is uniformly deformed, and when energized, the support base material 8 is deformed following the contraction of each shape memory alloy wire 2, 2. .

  The support base 8 is formed such that the total length in the longitudinal direction is shorter than the total length of each shape memory alloy wire 2, 2... And the center side of each shape memory alloy wire 2, 2. It arrange | positions so that a part may be supported, and, thereby, the exposed parts 9 and 9 for electrode connection which the edge part of each shape memory alloy wire 2,2, ... may be exposed in the both ends of the support base material 8 are formed. It has become.

  In the embodiment shown in FIGS. 1 and 2, the support base 8 is formed shorter than the shape memory alloy wires 2, 2,... And the electrode connection exposed portions 9, 9 are already formed. The end portions of the wires 2, 2... Have been exposed. However, as shown in FIG. 5, the support base 8 has the same length as each shape memory alloy wire 2, 2. Further, both end portions of the support base material 8 can be separated. For example, the shape memory alloy wire rods 2, 2... The portions 8b and 8b are formed so that they can be stripped, and when not in use, the ends of the shape memory alloy wires 2, 2... Are protected. It may be configured such that the electrode connection exposed portions 9, 9 can be formed at the time of incorporation into an electronic device.

  Further, the exposed portions 9 and 9 for electrode connection are each provided with a tip fixing portion 50 in which the tips of the exposed shape memory alloy wire rods 2, 2... Are fixed in a parallel arrangement spaced apart from each other. It may be.

  As shown in FIG. 6 (a), the tip fixing portion 50 uses a pair of tip fixing tape-like members 50a, 50a in the same manner as the support base 8, and each shape memory alloy wire 2, 2,. It may be formed by sandwiching the tip of the part, and as shown in FIG. 6 (b), the support base 8 is made to have the same length as the total length of each shape memory alloy wire 2, 2,. It may be formed by providing a rectangular oblong exposure hole 51 in which the end of each shape memory alloy wire 2, 2.

  The flat shape memory cable body 7 configured in this way has a plurality of shape memory alloy wires 2, 2... Gathered together by the support base 8 and is supported in a uniform state. As a result of the contraction due to the above, the entire device is operated in a stable state. Further, it is possible to distribute the flat shape memory cable body 7 alone.

  In addition, when each thin shape memory alloy wire 2, 2,... Operates alone, there is a possibility that abnormal noise such as wind noise may occur, and there is a problem with the flat shape memory cable body 7 thus configured. Thus, the noises such as wind noise can be suppressed by collectively supporting the shape memory alloy wires 2, 2.

  In addition, when using a plurality of shape memory alloy wires 2, 2,..., The frequency of each shape memory alloy wire 2, 2,. Therefore, if the arrangement of each wire is different, there is a possibility that the operation sound generated during the contraction operation due to heat generation during energization differs for each wire, or the operation sound may be amplified by interfering with each other.

  However, in the flat shape memory cable body 7 as described above, such a problem is solved, and the shape memory alloy wires 2, 2,... can do.

  In the above-described embodiment, the flat shape memory cable body 7 in which the support base material 8 supports the plurality of shape memory alloy wires 2, 2... Has been described, but the shape memory to be supported by the support base material 8. The number of alloy wires 2 is not limited to that in the above embodiment, and one shape memory alloy wire may be supported on the support base 8, and more shape memory alloy wires than in the above embodiment may be used. You may make it support.

  Next, the drive device 1 using such a flat shape memory cable body 7 will be described with reference to FIGS. In addition, the same code | symbol is attached | subjected and demonstrated to the structure similar to the above-mentioned Example.

  This drive device 1 has a pair of terminal members 6, 6 to which the end portions of the shape memory alloy wires 2, 2 ... exposed from the electrode connection exposed portions 9, 9 of the flat shape memory cable body 7 are connected. A base member 4 that supports the terminal members 6, 6, a movable member 5 that operates in conjunction with the contraction of each shape memory alloy wire 2, 2... During energization heat generation, and the movable member 5 as a shape memory alloy. The wire rods 2, 2... Are provided with urging means for urging them in a direction that forms a shape when not energized.

  The base member 4 is formed into an elongated plate shape by an insulating material or a material provided with an insulating coating, and is provided with flat plate-like fixing portions 3 and 3 projecting outward in the longitudinal direction from the end face of the main body at both longitudinal ends. .

  The base member 4 is provided with an operation allowing portion 11 including one or a plurality of operation recesses 10, 10... So that the flat shape memory cable body 7 crosses the operation allowing portion 11. The end portions of the shape memory alloy wire rods 2, 2... Which are arranged in the direction between the fixed portions 3 and 3 and are exposed from the electrode connection exposure portions 9 and 9 formed at both ends thereof are respectively terminal members. 6 is fixed to the fixing portion 3.

  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...

  The fixing portion 3 is formed in a flat plate shape, and as shown in FIG. 10, the end base of each shape memory alloy member 2, 2... Exposed from the terminal connection exposure portion 9 of the flat shape memory cable material 7. The end side 2a is arranged along the surface of the fixed portion 3, and the end tip side 2b is folded back to the back surface side through the end surface portion of the fixed portion 3, and is arranged along the back surface. By fitting 6, the end portions of the shape memory alloy members 2, 2... Are 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. 10, each folding guide portion 14 is formed in a groove shape in the end surface portion of the fixed 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 member 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. 11, the terminal member 6 is formed in a shape having a pair of pressing plate portions 20 and 21 that are arranged opposite to each other and are electrically connected to each other, and the pressing 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 member 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 member 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. Are sandwiched between the shape memory alloy members 2, 2..., Thereby fixing the end portions of the shape memory alloy members 2, 2. ing.

  The opening inner edge 6a of the terminal member 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 fixing portion 3 in a direction intersecting with the longitudinal direction of the base member 4, and as shown in FIG. In addition, the locking protrusion 25 is formed by caulking the pressing plate portion 21 on the back surface side, and the end portions 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 member 6 is fitted into the fixed 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 flat shape memory cable material 7 disposed between the opposing surface portions is 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 member 6, that is, the front side pressing plate portions 20, 21 in an overlapping arrangement.

  The urging means includes a magnet portion on the movable member 5 so that the movable member 5 is urged to the side overlapping the base member 4 by the attractive force between the magnet portion and the terminal member 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, and the magnets 32 and 32 may be embedded in the flat portions 31 and 31 of the movable member 5. Also good.

  In the drive device 1 configured as described above, as shown in FIG. 12 (a), the energizing means, that is, the movable member 5 and the terminal member 6 are adsorbed 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. Comes into contact with the flat shape memory cable body 7, and the flat shape memory cable body 7 is deformed into a corrugated shape. Accordingly, each shape memory alloy member 2, 2 ... is corrugated (non-energized shape). It is in a deformed state.

  When the drive device 1 is energized, that is, a voltage is generated between the terminal members 6 and 6 and a current is passed through the shape memory alloy members 2, 2..., The shape memory alloy members 2, 2. Since the support base material 8 is deformed by the memory effect, that is, contracted by energization heat generation, the entire flat shape memory cable body 7 is deformed, and as shown in FIG. The moving projections 30, 30... Of the body 7 are displaced in the direction between the opposing surfaces of the portions in contact with the tops to the movable member side. The movable member 5 is pushed up by the storage cable body 7 and relatively moves in a direction away from the base member 4 against the urging force of the urging means, that is, the magnetic force m between the magnet portion and the terminal member 6 that is a magnetic body.

  At that time, since the movable member 5 is attracted to the terminal member 6 by the magnetic force m, the displacement of the movable member 5 due to the energization heat generation of the flat shape memory cable body 7 is maximized without being obstructed on the mechanical structure. On the other hand, it does not deviate from the relative movement trajectory.

  When the voltage applied between the terminal members 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 member 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. The flat shape memory cable body 7 is deformed into a corrugated shape by being pressed by the portions 30, 30 ..., and accordingly the shape memory alloy members 2, 2 ... are corrugated (non-energized shape). Deform.

  As described above, the operation of each shape memory alloy wire 2, 2... Is uniformly managed by being supported by the support base 8, and the area of the portion in contact with the movable member 5 is also increased. The movable member 5 operates stably and can ensure high quality.

  When the flat shape memory cable body 7 having the distal end fixing portion 50 is used, as shown in FIG. 13, the exposed end portions of the shape memory alloy wires 2, 2. Is disposed along the surface of the fixed portion 3, and the end tip side 2 b is folded back to the back surface side through the end surface portion of the fixed portion 3, and is disposed along the back surface. The front end side 2b is sandwiched between the fixing portion 3 and the pressing plate portions 20 and 21, respectively, and the edge of the back side pressing plate portion 21 is in contact with the front end fixing portion 50.

  Thus, the end of each shape memory alloy wire 2, 2... Exposed from the electrode connecting exposed portion 9 is shown by the arrow t in FIG. The terminal member 6 is connected to the terminal member 6 in a stable state. In this case, the end portions of the shape memory alloy wires 2, 2,... Are uniformly tensioned and do not get entangled with each other, so that the folded guide portions 14, 14 ... need to be formed in a comb blade shape. And the shape of the fixed portion can be simplified.

m Magnetic Force A Printed Circuit Board 1 Drive Device 2 Shape Memory Alloy Wire 3 Fixed Part 4 Base Member 5 Movable Member 6 Terminal Member 7 Flat Shape Memory Cable Body 8 Support Base 9 Electrode Connection Exposed Part 10 Operation Recess 11 Operation Allowable Part 12 Supporting portion 14 Folding guide portion 15 Stepped portion 20 Pressing plate portion 21 Back side pressing 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 40 Deformation assisting part 50 Tip fixing part 51 Exposed hole

Claims (5)

A shape memory alloy wire that contracts due to heat generation when energized, a terminal member to which an end of the shape memory alloy wire is connected, a base member having a fixing portion into which the terminal member is fitted, and the shape memory alloy wire In a drive device comprising: a movable member that operates in conjunction with contraction during energization heat generation; and a biasing means that biases the movable member in a direction in which the shape memory alloy wire forms a shape during non-energization.
The shape memory alloy wire is supported by a flat support substrate having insulating properties and flexibility, and an exposed portion for electrode connection is formed at the end of the support substrate so that the end of the shape memory alloy wire is exposed. A flat shape memory cable body,
The terminal member includes a pair of pressing plate portions that are put on the front and back surfaces of the fixed portion,
The front end side of the end portion of the shape memory alloy wire disposed along the back surface of the fixing portion is sandwiched between the fixing portion and the pressing plate portion, and the electrode connection exposed portion is connected to the terminal member. A drive device characterized by that.   The drive device according to claim 1, wherein a plurality of shape memory alloy wires are supported on the support base material in a parallel arrangement spaced apart from each other.   3. The drive device according to claim 1, further comprising a tip fixing portion to which a tip of the exposed end portion of the shape memory alloy wire is fixed to the electrode connecting exposed portion.   4. The drive device according to claim 3, wherein the tip fixing portions are configured to support tips of a plurality of shape memory alloy wire rod ends in a parallel arrangement spaced apart from each other. The base member and the movable member are arranged to face each other,
The base member includes a deformation allowing portion including one or a plurality of operation concave portions on the opposite surface side,
The movable member includes an operation convex portion that is inserted into the operation concave portion on the opposite surface side so that the flat shape memory cable body crosses the deformation allowable portion between the base member and the movable member. The flat shape memory cable body that is arranged and pressed by the operation convex portion and is bent in the operation concave portion is deformed by contraction of each shape memory alloy wire due to heat generation upon energization, and the flat shape The drive device according to claim 1, wherein the movement convex portion is pressed against the storage cable body and the movable member is relatively moved in a direction away from the base member.

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