Drive motor and imaging device

Abstract

The present invention discloses a driving motor and a camera device, wherein the driving motor comprises: a movable part; a bearing part, the movable part is movably arranged on the bearing part, the bearing part is provided with an elastic arm, the free end of the elastic arm abuts against the movable part, and the elastic arm is used to drive the movable part to move; a memory alloy wire, one end of the memory alloy wire is connected to the elastic arm, the other end of the memory alloy wire is connected to the bearing part, and the distance from the connection point of the memory alloy wire and the elastic arm to the fixed end of the elastic arm is less than the arm length of the elastic arm. The embodiment of the present invention can not only increase the driving stroke, but also occupy a small volume.

Description

Technical Field

[0001] The present invention relates to the field of camera technologies, and particularly to a driving motor and a camera device. Background Art

[0002] A driving motor is a device used to drive the movement of a camera lens in a camera device. Currently, a shape memory alloy wire is generally used for driving. The shape memory alloy wire generally has a large driving force, but a relatively small driving stroke. After the shape memory alloy wire is electrified, it will contract, thereby generating a pulling force to achieve the driving movement. In order to increase the driving stroke, currently, the length of the shape memory alloy wire is usually increased. For example, the shape memory alloy wire is arranged around a device to increase its length and thus the driving stroke. However, the driving motor with this structure occupies a relatively large volume. Summary of the Invention

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. For this purpose, the present invention provides a driving motor that can not only increase the driving stroke but also has a small occupied volume.

[0004] The present invention also provides a camera device having the above driving motor.

[0005] The driving motor according to the first aspect embodiment of the present invention includes:

[0006] A movable part;

[0007] A bearing part, the movable part is movably arranged on the bearing part. The bearing part is provided with an elastic arm, and the free end of the elastic arm abuts against the movable part. The elastic arm is used to drive the movement of the movable part;

[0008] A shape memory alloy wire, one end of the shape memory alloy wire is connected to the elastic arm, the other end of the shape memory alloy wire is connected to the bearing part, and the distance from the connection point of the shape memory alloy wire and the elastic arm to the fixed end of the elastic arm is less than the arm length of the elastic arm.

[0009] The drive motor according to an embodiment of the present invention has at least the following beneficial effects: The drive motor of this embodiment includes a movable part, a bearing part, and a shape memory alloy wire. By providing an elastic arm on the bearing part, one end of the shape memory alloy wire is connected to the elastic arm, and the other end of the shape memory alloy wire is connected to the bearing part. The purpose of this setting is: Based on the lever principle, the free end of the elastic arm abuts against the movable part. When the shape memory alloy wire is energized, the shape memory alloy wire contracts upon energization to pull the elastic arm, and the elastic arm moves under the pulling force of the shape memory alloy wire to drive the free end of the elastic arm to drive the movable part to move; and since the distance from the connection point of the shape memory alloy wire and the elastic arm to the fixed end of the elastic arm is less than the arm length of the elastic arm, the shape memory alloy wire can pull the elastic arm to produce a large amplitude, so as to further increase the driving stroke of the movable part. Compared with the prior art of increasing the driving stroke by lengthening the length of the shape memory alloy wire, the drive motor of this embodiment can increase the driving stroke by setting an elastic arm to drive the movable part, and there is no need to use a shape memory alloy wire with an increased length, which can reduce the occupied volume of the drive motor, and the driving stroke of the movable part can be more accurately controlled by controlling the contraction degree of the shape memory alloy wire.

[0010] According to some embodiments of the present invention, fixing parts are provided on both sides of each of two diagonals of the bearing part, and the elastic arms are provided on both sides of each of the other two diagonals of the bearing part; there are four shape memory alloy wires, one end of one shape memory alloy wire is connected to one elastic arm, and the other end of one shape memory alloy wire is connected to the fixing part opposite to the elastic arm.

[0011] According to some embodiments of the present invention, the bearing part includes a substrate and a fixing plate, the fixing plate is arranged on the substrate, the movable part is movably arranged on the fixing plate, and one of the substrate and the fixing plate is provided with the elastic arm, and the other is provided with the fixing part.

[0012] According to some embodiments of the present invention, there are several substrates, and each substrate is independent of each other, and the elastic arms are correspondingly arranged on different substrates.

[0013] According to some embodiments of the present invention, the heights between two shape memory alloy wires arranged in different directions are different.

[0014] According to some embodiments of the present invention, the elastic arm is provided with a connecting piece, the distance from the connecting piece to the fixed end of the elastic arm is less than the arm length of the elastic arm, the heights between the connecting pieces on two adjacent elastic arms are different, the heights between two adjacent fixing parts are different, and the height of the connecting piece is the same as the height of the fixing part arranged opposite thereto. One end of a shape memory alloy wire is connected to one connecting piece, and the other end of the shape memory alloy wire is connected to the fixing part arranged opposite to the connecting piece.

[0015] According to some embodiments of the present invention, the movable part is provided with four grooves, and a shape memory alloy wire is located in one groove.

[0016] According to some embodiments of the present invention, the elastic arm includes a fixed part and a deformed part, the fixed part and the deformed part are connected to form an L shape, the fixed part is perpendicular to the movable part, the fixed part is the fixed end of the elastic arm, and the free end of the deformed part abuts against the movable part.

[0017] According to some embodiments of the present invention, the movable part is provided with a wear-resistant part at a position corresponding to the free end of the elastic arm, and the free end of the elastic arm abuts against the wear-resistant part.

[0018] The imaging device according to the second aspect embodiment of the present invention includes the drive motor according to the first aspect embodiment of the present invention above.

[0019] The imaging device according to the embodiment of the present invention has at least the following beneficial effects: By adopting the above drive motor, the driving stroke of the movable part can be increased to achieve an anti-shake effect, and no excessive magnetism will be generated to interfere with the imaging device; in addition, the occupied volume of the imaging device can be effectively reduced.

[0020] The additional aspects and advantages of the present invention will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or additional aspects and advantages of the present invention will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

[0022] Figure 1 is a schematic structural diagram of the drive motor according to the embodiment of the present invention;

[0023] Figure 2 is a schematic structural diagram of the drive motor according to the embodiment of the present invention;

[0024] Figure 3 is Figure 2 the exploded view of the drive motor shown in;

[0025] Figure 4 The top view of the drive motor according to an embodiment of the present invention;

[0026] Figure 5 The top view of the drive motor according to an embodiment of the present invention (the movable part is not shown).

[0027] Reference numerals:

[0028] Movable part 100, groove 101, wear-resistant part 102,

[0029] Carrying part 200, elastic arm 210, connecting piece 211, fixed part 212, deformed part 213, fixing part 220, substrate 230, fixing plate 240,

[0030] Shape memory alloy wire 300. Detailed implementation manners

[0031] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0032] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as up, down, front, back, left, right, etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention.

[0033] In the description of the present invention, the meaning of several is one or more, the meaning of multiple is two or more, greater than, less than, exceeding, etc. are understood as not including the number itself, and above, below, within, etc. are understood as including the number itself. If the first and second are described only for the purpose of distinguishing technical features, they should not be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or the sequence of the indicated technical features.

[0034] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific content of the technical solution.

[0035] The drive motor according to the present invention will be described below with reference to the drawings.

[0036] Refer to Figures 1 to 5, a drive motor according to an embodiment of the first aspect of the present invention includes: a movable part 100; a bearing part 200, the movable part 100 is movably arranged on the bearing part 200, the bearing part 200 is provided with an elastic arm 210, the free end of the elastic arm 210 abuts against the movable part 100, and the elastic arm 210 is used to drive the movable part 100 to move; a shape memory alloy wire 300, one end of the shape memory alloy wire 300 is connected to the elastic arm 210, the other end of the shape memory alloy wire 300 is connected to the bearing part 200, and the distance from the connection point of the shape memory alloy wire 300 and the elastic arm 210 to the fixed end of the elastic arm 210 is less than the arm length of the elastic arm 210.

[0037] It can be understood that the drive motor of this embodiment includes a movable part 100, a bearing part 200 and a shape memory alloy wire 300. By providing an elastic arm 210 on the bearing part 200, one end of the shape memory alloy wire 300 is connected to the elastic arm 210, and the other end of the shape memory alloy wire 300 is connected to the bearing part 200. The purpose of such a setting is: based on the lever principle, the free end of the elastic arm 210 abuts against the movable part 100. When the shape memory alloy wire 300 is energized, the shape memory alloy wire 300 contracts when energized to pull the elastic arm 210, and the elastic arm 210 moves under the action of the pulling force to drive the free end of the elastic arm 210 to drive the movable part 100 to move; and because the distance from the connection point of the shape memory alloy wire 300 and the elastic arm 210 to the fixed end of the elastic arm 210 is less than the arm length of the elastic arm 210, the shape memory alloy wire 300 can pull the elastic arm 210 to produce a large amplitude, that is, the elastic arm 210 obtains greater elasticity to further increase the driving stroke of the movable part 100.

[0038] It can be understood that the bearing part 200 can be set as a single piece, for example, by using FPC or by making circuits on metal to achieve circuit connection.

[0039] It can be understood that the bearing part 200 can be provided with a fixing part at a position relative to the elastic arm 210, one end of the shape memory alloy wire 300 is connected to the elastic arm 210, and the other end of the shape memory alloy wire 300 is connected to the fixing part. In other embodiments, the bearing part 200 can also be provided with a fixing part at its corner points or other positions.

[0040] The drive motor according to the embodiment of the present invention has at least the following beneficial effects: compared with the prior art of increasing the driving stroke by lengthening the length of the shape memory alloy wire 300, the drive motor of this embodiment can increase the driving stroke by setting an elastic arm 210 to drive the movable part 100 to move, and there is no need to use a shape memory alloy wire 300 with an increased length, which can reduce the occupied volume of the drive motor, and the driving stroke of the movable part 100 can be more accurately controlled by controlling the contraction degree of the shape memory alloy wire 300.

[0041] Refer to Figure 2, Figure 3 , according to some embodiments of the present invention, fixing parts 220 are provided on both sides of each of two opposite corners of the bearing part 200, and elastic arms 210 are provided on both sides of each of the other two opposite corners of the bearing part 200; there are four shape memory alloy wires 300, one end of a shape memory alloy wire 300 is connected to an elastic arm 210, and the other end of a shape memory alloy wire 300 is connected to the fixing part 220 disposed opposite to the elastic arm 210.

[0042] It can be understood that by providing fixing parts 220 on both sides of each of two opposite corners of the bearing part 200 and elastic arms 210 on both sides of each of the other two opposite corners of the bearing part 200, it is to make an elastic arm 210 abut against each of the four different sides of the movable part 100. One end of a shape memory alloy wire 300 is connected to an elastic arm 210, and the other end of a shape memory alloy wire 300 is connected to the fixing part 220 disposed opposite to the elastic arm 210, so that one shape memory alloy wire 300 corresponds to one elastic arm 210 and one fixing part 220, and the elastic arm 210 and the fixing part 220 are in a relatively disposed relationship. By making an elastic arm 210 abut against each of the four different sides of the movable part 100, it is to enable the elastic arm 210 to drive the movable part 100 to translate or rotate.

[0043] The elastic arm 210 drives the movable part 100 to translate: When the shape memory alloy wire 300 is energized, it will contract. The shape memory alloy wire 300 drives the elastic arm 210 to move under the action of tension, so as to drive the movable part 100 to translate. Specifically, a fixing part 220 can be set on one side of each of two diagonals of the bearing part 200. The two fixing parts 220 that are in a parallel relationship and are located on two diagonals respectively are energized, so that the two shape memory alloy wires 300 respectively connected to the two fixing parts 220 are energized. After the shape memory alloy wire 300 is energized, it will contract, thereby driving the two elastic arms 210 disposed opposite to the two fixing parts 220 (that is, an elastic arm 210 on one side of each of the other two diagonals of the bearing part 200) to move, so that the free ends of the two elastic arms 210 simultaneously act on and clamp the opposite sides of the movable part 100; at this time, another fixing part 220 on the other side of each of the two diagonals of the bearing part 200 is energized, so that the shape memory alloy wire 300 connected to the other fixing part 220 is energized. After the shape memory alloy wire 300 is energized, it contracts, generating a pulling force to drive the elastic arm 210 disposed opposite to the other fixing part 220 to move. In this process, the opposite sides of the movable part 100 are clamped by the free ends of the two elastic arms 210, that is, the forces generated by the two elastic arms 210 on the opposite sides of the movable part 100 are equal in magnitude and opposite in direction, and the resultant force is zero; when the movable part 100 is simultaneously pushed by the free ends of the elastic arms 210 disposed opposite to the other fixing part 220, the movable part 100 can be translated while being clamped, so as to drive the movable part 100 to translate along the X-axis direction or the Y-axis direction.

[0044] The elastic arm 210 drives the movable part 100 to rotate: For example, driving the movable part 100 to rotate clockwise or counterclockwise. The specific process is as follows: For a fixing part 220 on one side of each of the two diagonals of the bearing part 200, the two fixing parts 220 that are in a parallel relationship and are located on two diagonals respectively are energized, so that the two shape memory alloy wires 300 respectively connected to the two fixing parts 220 are energized. After the shape memory alloy wire 300 is energized, it will contract, thereby driving the two elastic arms 210 disposed opposite to the two fixing parts 220 (that is, an elastic arm 210 on one side of each of the other two diagonals of the substrate 230) to move. The free ends of the two elastic arms 210 respectively act on the opposite sides of the movable part 100, thereby realizing the driving of the movable part 100 to rotate. Since the free ends of the two elastic arms 210 respectively act on the opposite sides of the movable part 100, each elastic arm 210 will generate two pairs of couples. By applying different currents, that is, increasing or decreasing the torque, the movable part 100 can be rotated in two directions, clockwise or counterclockwise.

[0045] In other embodiments, one end of a plurality of shape memory alloy wires 300 can also be connected at different positions on an elastic arm 210, and the other ends of the plurality of shape memory alloy wires 300 are connected to a fixing portion 220 disposed opposite to an elastic arm 210. By passing different magnitudes of current through the plurality of shape memory alloy wires 300, for example, in order to achieve driving translation, for the elastic arm 210 perpendicular to the translation direction (X-axis direction or Y-axis direction), the current of the shape memory alloy wire 300 close to the fixed end of the elastic arm 210 is set to be the largest and gradually decreases in sequence, so that the current of the shape memory alloy wire 300 gradually away from the fixed end of the elastic arm 210 gradually decreases. By the difference in the energizing currents of the different shape memory alloy wires 300 at different positions on an elastic arm 210, a larger driving stroke is achieved.

[0046] In other embodiments, each of two diagonals of the bearing portion 200 is provided with a stepped notch having two steps, and a fixing portion 220 is provided on the side wall of one step in the stepped notch, which can effectively save space.

[0047] The drive motor of this embodiment can not only drive the movable portion 100 to translate, but also drive the movable portion 100 to rotate.

[0048] According to some embodiments of the present invention, the bearing portion 200 includes a substrate 230 and a fixing plate 240. The fixing plate 240 is disposed on the substrate 230, and the movable portion 100 is movably disposed on the fixing plate 240. One of the substrate 230 and the fixing plate 240 is provided with an elastic arm 210, and the other is provided with a fixing portion 240.

[0049] Refer to Figure 2 、 Figure 3 As shown in FIGS., the bearing portion 200 includes a substrate 230 and a fixing plate 240. By disposing the elastic arms 210 on the substrate 230 and the fixing portions 220 on the fixing plate 240, energization control of the shape memory alloy wires 300 connected to the fixing portions 220 can be realized respectively, so as to realize energization control of the elastic arms 210 respectively. In this embodiment, by setting the bearing portion 200 as the substrate 230 and the fixing plate 240, wiring is facilitated.

[0050] In other embodiments, the fixing plate 240 is provided with an elastic arm 210, and the substrate 230 is provided with a fixing portion 240.

[0051] Refer to Figure 3 As shown in FIG., according to some embodiments of the present invention, a plurality of substrates 230 are provided, and each substrate 230 is independent of each other, and the elastic arms 210 are correspondingly disposed on different substrates 230.

[0052] It can be understood that by providing a plurality of substrates 230, and each substrate 230 being independent of each other, it is to facilitate driving each individual elastic arm 210. Specifically, the substrate 230 is made of a conductive material, the fixing plate 240 is made of a conductive material, and the substrate 230 and the fixing plate 240 are insulated from each other. Pins are provided on both the substrate 230 and the fixing plate 240 on the same side of the carrying portion 200. The pins on the substrate 230 and the pins on the fixing plate 240 form a connection terminal, and the provided connection terminal facilitates wiring. Through the substrate 230 and the fixing plate 240, power-on control is achieved. After the substrate 230 and the fixing plate 240 are conductive, the shape memory alloy wire 300 connected to the fixing portion 220 can be powered on. After the shape memory alloy wire 300 is powered on, it will have a driving force, so that after the shape memory alloy wire 300 contracts when powered on, it can pull the elastic arm 210 to move, so as to further drive the movable portion 100 to move.

[0053] According to some embodiments of the present invention, the heights between two shape memory alloy wires 300 arranged in different directions are different.

[0054] It can be understood that the different heights between two shape memory alloy wires 300 arranged in different directions are to prevent the shape memory alloy wires 300 from being wound, crossed, or contacting each other, etc., so as to better realize the driving of the elastic arm 210 corresponding to each shape memory alloy wire 300.

[0055] Refer to Figure 2 、 Figure 3 According to some embodiments of the present invention, the elastic arm 210 is provided with a connecting piece 211. The distance from the connecting piece 211 to the fixed end of the elastic arm 210 is less than the arm length of the elastic arm 210. The heights between the connecting pieces 211 on adjacent two elastic arms 210 are different, the heights between adjacent two fixing portions 220 are different, and the height of the connecting piece 211 is the same as the height of the fixing portion 220 arranged opposite thereto. One end of a shape memory alloy wire 300 is connected to a connecting piece 211, and the other end of a shape memory alloy wire 300 is connected to the fixing portion 220 arranged opposite to the connecting piece 211.

[0056] It can be understood that one end of a shape memory alloy wire 300 is connected to a connecting piece 211 on an elastic arm 210, and the other end of a shape memory alloy wire 300 is connected to a fixing part 220 disposed opposite to the connecting piece 211. The height of the connecting piece 211 on an elastic arm 210 is the same as that of the fixing part 220 disposed opposite thereto, while the heights between the connecting pieces 211 on two adjacent elastic arms 210 are different, and the heights between two adjacent fixing parts 220 are different. The purpose of such a setting is to make the heights between two shape memory alloy wires 300 disposed in different directions different, so as to prevent the shape memory alloy wires 300 from being wound, crossed or contacting each other, etc., so as not to affect the driving effect of the movable part 100. In other embodiments, the fixing part 220 can be L-shaped, so as to facilitate setting the height of the shape memory alloy wire 300 connected to the fixing part 220, and can save the space inside the driving motor, thereby facilitating reducing the volume of the driving motor.

[0057] It can be understood that the elastic arm 210 and the connecting piece 211 can be integrally formed.

[0058] Referring to Figure 1 , according to some embodiments of the present invention, the movable part 100 is provided with four grooves 101, and a shape memory alloy wire 300 is located in one groove 101.

[0059] It can be understood that by providing four grooves 101 in the movable part 100 and a shape memory alloy wire 300 being located in one groove 101, it is convenient to save the space inside the driving motor, thereby facilitating reducing the volume of the driving motor.

[0060] Referring to Figure 3 , according to some embodiments of the present invention, the elastic arm 210 includes a fixed part 212 and a deformed part 213. The fixed part 212 and the deformed part 213 are connected to form an L shape. The fixed part 212 is perpendicular to the movable part 100. The fixed part 212 is the fixed end of the elastic arm 210, and the free end of the deformed part 213 abuts against the movable part 100.

[0061] It can be understood that the elastic arm 210 includes a fixed portion 212 and a deformed portion 213. The fixed portion 212 and the deformed portion 213 are connected to form an L shape. The fixed portion 212 is the fixed end of the elastic arm 210. And the distance from the connection point of the shape memory alloy wire 300 and the deformed portion 213 of the elastic arm 210 to the fixed portion 212 is less than the arm length of the elastic arm 210 (i.e., less than the length of the deformed portion 213). By arranging the shape memory alloy wire 300 close to the fixed portion 212 of the elastic arm 210, when the shape memory alloy wire 300 connected to one end of the deformed portion 213 of the elastic arm 210 is electrified, after the shape memory alloy wire 300 contracts when electrified, it can drive the deformed portion 213 to generate a large deformation, so that the free end of the deformed portion 213 drives the movable portion 100 to move and increases the driving stroke.

[0062] It can be understood that the deformed portion 213 can be arranged parallel to the movable portion 100. In other embodiments, an angle can also be provided between the deformed portion 213 and the movable portion 100, and the free end of the deformed portion 213 can abut against the movable portion 100.

[0063] Refer to Figure 2 、 Figure 3 According to some embodiments of the present invention, a wear-resistant portion 102 is provided at the position of the movable portion 100 corresponding to the free end of the elastic arm 210, and the free end of the elastic arm 210 abuts against the wear-resistant portion 102.

[0064] It can be understood that by providing the wear-resistant portion 102 at the position of the movable portion 100 corresponding to the free end of the elastic arm 210, when the shape memory alloy wire 300 is electrified, the shape memory alloy wire 300 drives the elastic arm 210 to move. When the free end of the elastic arm 210 abuts against the movable portion 100 and pushes the movable portion 100 to move, the friction between the free end of the elastic arm 210 and the movable portion 100 can be effectively reduced to ensure the service life of the elastic arm 210.

[0065] It can be understood that the movable portion 100 can also be made of wear-resistant material.

[0066] The imaging device according to the second aspect embodiment of the present invention includes the drive motor according to the first aspect embodiment of the present invention above.

[0067] The imaging device according to the embodiment of the present invention has at least the following beneficial effects: By adopting the above drive motor, the driving stroke of the movable portion can be increased to achieve an anti-shake effect, and no excessive magnetism will be generated to interfere with the imaging device; in addition, the occupied volume of the imaging device can be effectively reduced.

[0068] The other configurations and operations of the imaging device according to the embodiment of the present invention are known to those of ordinary skill in the art and will not be described in detail here.

[0069] The following refers to Figures 1 to 5 A drive motor according to an embodiment of the present invention is described in detail with a specific embodiment. It should be understood that the following description is only an exemplary illustration and not a specific limitation of the invention.

[0070] The drive motor according to the embodiment of the present invention includes:

[0071] A carrying part 200, the carrying part 200 includes a substrate 230 and a fixing plate 240. The fixing plate 240 is arranged on the substrate 230. Fixing parts 220 are provided on both sides of each of two diagonals of the fixing plate 240, and elastic arms 210 are provided on both sides of each of the other two diagonals of the substrate 230; a staggered diagonal line is formed between two diagonals of the fixing plate 240 and the other two diagonals of the substrate 230; the fixing part 220 is arranged in an L shape;

[0072] A movable part 100, the movable part 100 is provided with four grooves 101, and four wear-resistant parts 102 are respectively provided at positions corresponding to the free ends of the four elastic arms 210; the movable part 100 is movably arranged on the fixing plate 240;

[0073] The elastic arm 210 includes a fixed part 212 and a deformed part 213. The fixed part 212 and the deformed part 213 are connected to form an L shape. The fixed part 212 is perpendicular to the movable part 100. The fixed part 212 is the fixed end of the elastic arm 210. The deformed part 213 is parallel to the movable part 100. The free end of the deformed part 213 abuts against the wear-resistant part 102; a connecting piece 211 is further provided on the deformed part 213. The distance from the connecting piece 211 to the fixed end of the elastic arm 210 is less than the arm length of the elastic arm 210 (the set elastic arm 210 has a longer resisting arm length, which will produce the effect of increasing the stroke). The heights between adjacent connecting pieces 211 on two adjacent elastic arms 210 are different, the heights between two adjacent fixing parts 220 are different, and the height of the connecting piece 211 is the same as the height of the relatively arranged fixing part 220; the function of the set elastic arm 210 is to make the cantilever part (i.e., the deformed part 213) of the elastic arm 210 form an articulated (approximate rotation) effect at the free end.

[0074] Four shape memory alloy wires 300, one end of a shape memory alloy wire 300 is connected to a connecting piece 211, and the other end of a shape memory alloy wire 300 is connected to a fixing part 220 opposite to the connecting piece 211; a shape memory alloy wire 300 is located in a groove 101.

[0075] For the drive motor according to the embodiment of the present invention, by setting like this, at least the following effects can be achieved:

[0076] Drive the movable part 100 to rotate, for example, drive the movable part 100 to rotate clockwise or counterclockwise. The process is as follows: For each of the two fixing parts 220 on one side of each of the two diagonals of the fixed plate 240, the two fixing parts 220 that are in a parallel relationship and are located at the two diagonals are energized, so that the two shape memory alloy wires 300 respectively connected to the two fixing parts 220 are energized. After the shape memory alloy wires 300 are energized, they will contract, thereby driving the movement of the two elastic arms 210 (that is, one elastic arm 210 on one side of each of the other two diagonals of the substrate 230) that are oppositely arranged with the two fixing parts 220. Since the elastic arm 210 includes a fixed part 212 and a deformed part 213, the free end of the deformed part 213 abuts against the wear-resistant part 102 of the movable part 100, and the distance from the connecting piece 211 to the fixed part 212 is less than the arm length of the elastic arm 210 (that is, the length of the deformed part 213). By pulling the connecting piece 211 on the deformed part 213 with the shape memory alloy wire 300, the free ends of the deformed parts 213 of the two elastic arms 210 act on the opposite sides of the movable part 100 at the same time, thereby realizing the rotation of the movable part 100. Since the free ends of the deformed parts 213 of the two elastic arms 210 will respectively act on the opposite sides of the movable part 100, each elastic arm 210 will generate two pairs of torque moments. By applying different currents, that is, increasing or decreasing the torque, the rotation of the movable part 100 in two directions, clockwise or counterclockwise, can be realized.

[0077] Drive the movable part 100 to translate, for example, drive the movable part 100 to translate along the X-axis direction or along the Y-axis direction. The process is as follows: For one fixing part 220 on one side of each of two diagonals of the fixing plate 240, the two fixing parts 220 that are in a parallel relationship and are located at the two diagonals respectively are electrified, so that the two shape memory alloy wires 300 respectively connected to the two fixing parts 220 are electrified. After the shape memory alloy wires 300 are electrified, they will contract, thereby driving the two elastic arms 210 (that is, one elastic arm 210 on one side of each of the other two diagonals of the substrate 230) that are oppositely arranged with the two fixing parts 220 to move, so that the free ends of the deformed parts 213 of the two elastic arms 210 simultaneously act to clamp the opposite sides of the movable part 100; at this time, the other fixing part 220 on the other side of one of the two diagonals of the fixing plate 240 is electrified, so that the shape memory alloy wire 300 connected to the other fixing part 220 is electrified. After the shape memory alloy wire 300 is electrified, it will contract and generate a pulling force to drive the elastic arm 210 that is oppositely arranged with the other fixing part 220 to move. In this process, the opposite sides of the movable part 100 are clamped by the free ends of the deformed parts 213 of the two elastic arms 210, that is, the forces generated by the two elastic arms 210 on the opposite sides of the movable part 100 are equal in magnitude and opposite in direction, and the resultant force is zero; when the movable part 100 is simultaneously pushed by the free ends of the deformed parts 213 of the elastic arms 210 that are oppositely arranged with the other fixing part 220, the movable part 100 can be translated while being clamped, so as to drive the movable part 100 to translate along the X-axis direction or along the Y-axis direction.

[0078] By adopting the above-mentioned drive motor, the driving stroke of the movable part can be increased to achieve the anti-shake effect; in addition, the occupied volume can be effectively reduced.

[0079] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0080] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A driving motor, characterized in that, Comprising: An active part; A bearing part, the active part is movably arranged on the bearing part, the bearing part is provided with elastic arms, the free ends of the elastic arms abut against the active part, and the elastic arms are used to drive the active part to move; on both sides of each of two diagonals of the bearing part, fixing parts are provided, and on both sides of each of the other two diagonals of the bearing part, the elastic arms are provided; the elastic arms include a fixed part and a deformed part, the fixed part and the deformed part are connected to form an L shape, the fixed part is perpendicular to the active part, the fixed part is the fixed end of the elastic arm, the free end of the deformed part abuts against the active part, and the deformed part is provided with a connecting piece, and the distance from the connecting piece to the fixed end of the elastic arm is less than the arm length of the elastic arm; A shape memory alloy wire, one end of the shape memory alloy wire is connected to the connecting piece of the deformed part of the elastic arm, and the other end of the shape memory alloy wire is connected to the fixing part arranged opposite to the elastic arm.

2. The drive motor according to claim 1, characterized in that, There are four said shape memory alloy wires.

3. The drive motor according to claim 2, characterized in that, The bearing part includes a substrate and a fixing plate, the fixing plate is arranged on the substrate, the active part is movably arranged on the fixing plate, and one of the substrate and the fixing plate is provided with the elastic arm, and the other is provided with the fixing part.

4. The drive motor according to claim 3, wherein, There are a plurality of said substrates, and each of the substrates is independent of each other, and the elastic arms are correspondingly arranged on different substrates.

5. The drive motor according to claim 2 or 3 or 4, characterized in that, The heights between two said shape memory alloy wires arranged in different directions are different.

6. The drive motor according to claim 5, characterized in that, The heights between the connecting pieces on two adjacent elastic arms are different, the heights between two adjacent fixing parts are different, and the height of the connecting piece is the same as the height of the fixing part arranged opposite thereto. One end of a shape memory alloy wire is connected to a connecting piece, and the other end of the shape memory alloy wire is connected to the fixing part arranged opposite to the connecting piece.

7. The drive motor according to claim 2 or 3 or 4, characterized in that, The active part is provided with four grooves, and one shape memory alloy wire is located in one groove.

8. The drive motor according to claim 1, characterized in that At the position of the active part corresponding to the free end of the elastic arm, a wear-resistant part is provided, and the free end of the elastic arm abuts against the wear-resistant part.

9. An imaging device, characterized in that, Including the drive motor according to any one of claims 1 to 8.

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