Motor assemblies, movable cameras and electronic devices

Abstract

The embodiment of the present application provides a motor assembly, a movable camera and an electronic device, which relates to the field of terminal technology. The motor assembly includes: a movable part, a support seat and at least one driver, the support seat has a storage space, and the movable part and the driver are located in the storage space; the driver includes a shape memory film, the shape memory film is folded along the fold line and forms an angle, the shape memory film on one side of the fold line has a first end of the driver, and the shape memory film on the other side of the fold line has a second end of the driver, the first end is connected to the movable part, and the second end is connected to the support seat, and the driver is used to deform the shape memory film along the fold line under different currents and change the angle size, thereby driving the movable part to move. Thus, the motor assembly can drive the movable parts such as the lens in the movable camera to move, and meet the requirements of optical image stabilization and fast autofocus speed.

Description

Technical Field

[0001] The present application relates to the field of terminal technology, and in particular to a motor assembly, a movable camera and an electronic device. Background Art

[0002] With the development of science and technology, electronic devices such as mobile phones and tablets have more and more functions, which require a variety of electronic components to achieve different functions. For example, for the camera function, camera-related functions such as optical image stabilization and autofocus require higher and higher performance indicators, which are achieved by integrating specific motors to drive the movement of some parts of the camera. Therefore, how to realize motor drive is very important.

[0003] At present, there are many ways to drive motors, including voice coil motor drive, shape memory alloy microwire drive, etc. Among them, shape memory alloy microwire drive can achieve large load drive in its small volume and without magnetic interference, so it has received more attention.

[0004] However, shape memory alloy microwires dissipate heat slowly. After being powered on and heated once, they need to cool to a certain temperature before they can be driven again. This results in a low movement frequency and is unable to meet today's high demands for optical image stabilization, autofocus speed, etc. when taking photos, resulting in poor performance of electronic equipment. Summary of the invention

[0005] The embodiments of the present application provide a motor assembly, a movable camera and an electronic device. The driver in the motor assembly is composed of a shape memory film with a shape memory effect. After being powered on and heated, the shape memory film gradually unfolds. The shape memory film with a larger specific surface area can generate a larger thrust, thereby driving the movable component to perform a specific movement. Moreover, since the shape memory film dissipates heat faster, it can quickly return to its initial state and also generate a larger force in the process. Therefore, when applied to a movable camera, it can drive the movement of the lens in the movable camera, etc., to achieve requirements such as optical image stabilization and fast autofocus speed.

[0006] In order to achieve the above purpose, the embodiment of the present application adopts the following technical solution:

[0007] In a first aspect, a driver is provided, comprising: a shape memory film, a first sub-clamping mechanism, a second sub-clamping mechanism, a first electrode, and a second electrode, wherein the first sub-clamping mechanism clamps the lower surface of the shape memory film, and the second sub-clamping mechanism clamps the upper surface of the shape memory film, the first sub-clamping mechanism and the second sub-clamping mechanism are independent clamping mechanisms, the first electrode and the second electrode are both embedded in the second sub-clamping mechanism, the first electrode and the second electrode are located on the same side of the fold line, the first sub-clamping mechanism and the first electrode constitute the first end of the driver, and the second sub-clamping mechanism and the second electrode constitute the second end of the driver.

[0008] An embodiment of the present application provides a driver, in which the current generated by the first electrode flows from the second sub-shape memory film through the fold line, the first sub-shape memory film, and the fold line in sequence to the second electrode, so that the current flows through the entire shape memory film, so that the shape memory film can be deformed along the fold line and change the angle. At this time, the shape memory film dissipates heat faster and moves at a higher frequency. In this process, the driver can generate a greater driving force, which can drive the movable part to move.

[0009] In a possible implementation of the first aspect, the driver includes: a shape memory film, a first sub-clamping mechanism, a second sub-clamping mechanism, a first electrode and a second electrode, the first sub-clamping mechanism clamps the lower surface of the shape memory film, the second sub-clamping mechanism clamps the upper surface of the shape memory film, the first sub-clamping mechanism and the second sub-clamping mechanism are independent clamping mechanisms, the first electrode is embedded in the first sub-clamping mechanism, the second electrode is embedded in the second sub-clamping mechanism, the first electrode and the second electrode are located on different sides of the fold line, the first sub-clamping mechanism and the first electrode constitute the first end of the driver, and the second sub-clamping mechanism and the second electrode constitute the second end of the driver.

[0010] In this implementation, the current generated by the first electrode flows from the first sub-shape memory film through the fold line and the second sub-shape memory film in sequence to the second electrode, so that the current flows through the entire shape memory film, so that the shape memory film can be deformed along the fold line and change the angle. At this time, the shape memory film dissipates heat faster and moves more frequently. In this process, the driver can generate greater driving force to drive the movable part to move.

[0011] In a possible implementation of the first aspect, the driver includes: a shape memory film, a first sub-clamping mechanism, a second sub-clamping mechanism, a first electrode, a second electrode and an insulating portion, the first sub-clamping mechanism clamps the lower surface of the shape memory film, the second sub-clamping mechanism clamps the upper surface of the shape memory film, the first sub-clamping mechanism and the second sub-clamping mechanism are independent clamping mechanisms, the first electrode and the second electrode are both embedded in the second sub-clamping mechanism, the first electrode and the second electrode are located on the same side of the fold line, the first sub-clamping mechanism and the first electrode constitute a first end of the driver, the second sub-clamping mechanism and the second electrode constitute a second end of the driver, the insulating portion is embedded in the shape memory film, and the insulating portion spans the fold line.

[0012] In this implementation, the insulating part can guide the flow of current. Even when the area of ​​the shape memory film is large, the current generated by the first electrode can flow to the second electrode via the shortest path from the second sub-shape memory film through the fold line, the first sub-shape memory film, and the fold line in sequence, so that the current flows through the entire shape memory film, ensuring that the first sub-shape memory film and the second sub-shape memory film can both be deformed, and making the overall heating effect of the shape memory film better, thereby ensuring that the shape memory film dissipates heat faster and moves at a higher frequency. In this process, the driver can generate greater driving force to drive the movable part to move.

[0013] In a possible implementation of the first aspect, the shape memory alloy film may include a film made of alloy materials such as nickel-titanium alloy, iron-manganese-silicon alloy, copper-zinc-aluminum alloy, copper-aluminum-nickel alloy, etc.

[0014] In this implementation, shape memory alloys have the advantages of good reliability, wide temperature range, fatigue stability under long-term use, and not easy to break.

[0015] In a possible implementation of the first aspect, the shape memory polymer film may include a film made of a material modified from polyethylene, copolyester, polyamide, polyimide, copolyamide, polyurethane, etc.

[0016] In this implementation, the shape memory polymer film is widely available.

[0017] In a possible implementation manner of the first aspect, the shape memory polymer is mixed with a conductive material to form a shape memory polymer film.

[0018] In this implementation, the conductive material can enhance the conductivity of the shape memory polymer film, allowing it to move better under the action of electric current force and achieve self-heating.

[0019] In a second aspect, a motor assembly is provided, which includes: a movable part, a support seat and at least one driver, the support seat has a accommodating space, and the movable part and the driver are located in the accommodating space; the driver includes a shape memory film, the shape memory film is folded along a fold line and forms an angle, the shape memory film on one side of the fold line has a first end of the driver, and the shape memory film on the other side of the fold line has a second end of the driver, the first end of the driver is connected to the movable part, and the second end of the driver is connected to the support seat, and the driver is used to drive the movable part to move when the shape memory film is deformed along the fold line and the angle is changed under the action of different currents.

[0020] The embodiment of the present application provides a motor assembly, in which the driver is composed of a shape memory film with a shape memory effect, the driver and the movable part are both located in the accommodation space formed by the base, and the driver is connected to the movable part and the base respectively, so that when the driver is powered on and heated, the shape memory film gradually unfolds, and because the shape memory film has a large specific surface area, it can generate a large thrust, thereby pushing the movable part to perform a specific movement, and because the shape memory film dissipates heat faster, it can quickly return to its initial state under the action of itself or external force, and also generates a large force in the process. Therefore, when the motor assembly is applied to a movable camera, the driver in the motor assembly can generate a large thrust to push some parts of the movable camera, such as the lens, to move, thereby achieving requirements such as optical image stabilization and fast autofocus speed.

[0021] In a possible implementation of the second aspect, the motor assembly includes: a movable part, a support seat and two drivers, the support seat includes a base plate, a first wall plate and a second wall plate, the first wall plate and the second wall plate are arranged opposite to each other, the first wall plate is connected to the second wall plate through the base plate, the base plate, the first wall plate and the second wall plate form a storage space, the movable part and the driver are placed in the storage space, a pair of shape memory film drivers are placed on opposite sides of the movable part and placed at a specific initial angle, the first end of the driver located on the left side of the movable part is connected to the movable part, and the second end of the driver is fixed to the first wall plate, the first end of the driver located on the right side of the movable part is connected to the movable part, and the second end of the driver is fixed to the second wall plate, the bottom surface of the movable part is an arc surface, the top surface of the support seat is a plane, and part of the bottom surface of the movable part is directly connected to the top surface of the support seat.

[0022] In this implementation, if the left-side driver is powered on and heated, the shape memory film in the driver gradually expands, generating a large thrust, pushing the other parts of the movable component except the part connected to the top surface to swing, and at this time the shape memory film in the right-side driver is compressed, and if the heating is stopped, the shape memory film of the left-side driver dissipates heat faster, and can quickly recover its state under the action of itself or external force; conversely, if the right-side driver is powered on and heated, the shape memory film in the driver gradually expands, generating a large thrust, pushing the movable component to swing, and at this time the shape memory film in the left-side driver is compressed, and if the heating is stopped, the shape memory film of the left-side driver dissipates heat faster, and can quickly recover its state under the action of itself or external force, so that the movable component can achieve clockwise or counterclockwise rotation within a certain angle in the accommodating space.

[0023] In a possible implementation manner of the second aspect, the bottom surface of the movable component is a curved surface, and the top surface of the support seat is a concave surface.

[0024] In this implementation, the bottom surface of the arc-shaped movable component and the top surface of the concave support seat can be better overlapped.

[0025] In a possible implementation of the second aspect, the bottom surface of the arc-shaped movable component and the top surface of the concave support seat are connected by a first movable member, and the first movable member is fixed on the top surface of the concave support seat.

[0026] In this implementation, the first moving member can serve as a supporting rail to enable the movable component to move better.

[0027] In a possible implementation manner of the second aspect, an accessory is fixed to the surface of the movable component facing the two drivers, and the first end of the driver is connected to the accessory.

[0028] In this implementation, the attachment can ensure that the driver is tightly connected to the movable component in real time, so as to better transmit the larger thrust generated by the deformation of the driver to the movable component.

[0029] In a possible implementation manner of the second aspect, a first rotating shaft passes through the movable component, and the first rotating shaft is fixed to the bottom plate.

[0030] In this implementation, the movement stability of the movable part can be improved so that the movable part only rotates without moving in position. In this way, if the motor assembly falls off the electronic device during subsequent use, the motor assembly can still work normally.

[0031] In a possible implementation manner of the second aspect, spring plates are disposed between the movable component and the first wall plate and the second wall plate respectively.

[0032] In this implementation, the movable component and the support seat can be connected by a spring. Once deformation occurs, some springs are compressed and some are stretched. When the power heating is canceled, the spring has a rapid recoil force, and the tension of the spring can quickly pull the movable component back to its original position.

[0033] In a possible implementation of the second aspect, the motor assembly includes: a movable part, a support seat, two drivers, a movable part and a guide rod, a pair of shape memory film drivers are placed opposite to each other on the movable part and at a specific initial angle, the first end of the driver located on the left side of the movable part is connected to the movable part, and the second end of the driver is fixed to the first wall plate, the first end of the driver located on the right side of the movable part is connected to the movable part, and the second end of the driver is fixed to the second wall plate, the bottom surface of the movable part is a plane, the top surface of the support seat is a plane, the bottom surface of the movable part is directly connected to the top surface of the support seat, the movable part has a first body, a second body and a third body, the first body is connected to the third body through the second body, the width of the second body is smaller than the width of the first body and the width of the third body, the guide rod is fixed between the first body and the third body and does not contact the second body, the movable part is sleeved on the guide rod and connected to the second body.

[0034] In this implementation, if the left driver is powered on and heated, the shape memory film in the driver gradually expands, generating a large thrust to push the entire movable part to move. At this time, the shape memory film in the right driver is compressed, and if the heating is stopped, the shape memory film of the left driver dissipates heat faster and can quickly recover under the action of itself or external force; conversely, if the right driver is powered on and heated, the shape memory film in the driver gradually expands, generating a large thrust to push the entire movable part to move. At this time, the shape memory film in the left driver is compressed, and if the heating is stopped, the shape memory film of the left driver dissipates heat faster and can quickly recover under the action of itself or external force. In this way, the movable part can achieve a certain direction of left or right movement in the accommodation space.

[0035] In a possible implementation of the second aspect, the bottom surface of the flat movable component and the top surface of the flat support seat are connected via a second movable member, and the second movable member is fixed on the top surface of the support seat.

[0036] In this implementation, the second moving member can serve as a support rail to enable the movable component to move better.

[0037] In a possible implementation of the second aspect, the motor assembly includes: a movable part, a support base and two drivers, a pair of shape memory film drivers are placed on opposite sides of the movable part facing each other and at a specific initial angle, the first end of the driver located on the left side of the movable part is connected to the bottom surface of the movable part, and the second end of the driver is fixed to the first wall panel, and the first end of the driver located on the right side of the movable part is connected to the bottom surface of the movable part, and the second end of the driver is fixed to the second wall panel.

[0038] In this implementation, if the left and right actuators are powered on and heated, the shape memory films in the two actuators gradually expand, generating a large thrust to push the entire movable part to move. If the heating stops, the shape memory films dissipate heat faster, and the shape memory films in the two actuators can be compressed after quickly recovering to a state under the action of their own or external forces, so that the entire movable part moves. In this way, the movable part can achieve upward or downward movement in a certain direction within the accommodation space.

[0039] In a possible implementation manner of the second aspect, the first wall plate and the movable component are connected via a third movable member, and the second wall plate and the movable component are connected via two third movable members.

[0040] In this implementation, the third moving member can serve as a supporting rail to enable the movable component to move better.

[0041] In a possible implementation of the second aspect, the motor assembly includes: a movable part, a support seat, two drivers and a second rotating shaft, a pair of shape memory film drivers are placed on opposite sides of the movable part facing each other and placed at a specific initial angle, the first end of the driver located on the left side of the movable part is connected to the movable part, and the second end of the driver is fixed to the first wall panel, the first end of the driver located on the right side of the movable part is connected to the movable part, and the second end of the driver is fixed to the second wall panel, the second rotating shaft is sleeved in the movable part, and the second rotating shaft is respectively connected to the first wall panel and the second wall panel.

[0042] In this implementation, if the left driver is powered on and heated, the shape memory film in the driver gradually expands, generates a large thrust, and pushes the movable part to rotate around the second rotation axis. At this time, the shape memory film in the right driver is compressed, and if the heating is stopped, the shape memory film of the left driver dissipates heat faster and can quickly recover under the action of itself or external force; conversely, if the right driver is powered on and heated, the shape memory film in the driver gradually expands, generates a large thrust, and pushes the movable part to rotate around the second rotation axis. At this time, the shape memory film in the left driver is compressed, and if the heating is stopped, the shape memory film of the left driver dissipates heat faster and can quickly recover under the action of itself or external force. In this way, the movable part can achieve rotational movement around the second rotation axis in the accommodation space.

[0043] In a third aspect, a movable camera is provided, comprising a motor assembly as in the second aspect or any possible implementation of the second aspect.

[0044] An embodiment of the present application provides a movable camera, in which a driver in a motor assembly can generate a large thrust to drive some components in the movable camera, such as a lens, to move, thereby achieving requirements such as optical image stabilization and fast autofocus speed.

[0045] According to a fourth aspect, an electronic device is provided, comprising a movable camera as in the third aspect or any possible implementation of the third aspect.

[0046] An embodiment of the present application provides an electronic device that can achieve high requirements such as optical image stabilization and fast autofocus speed and has good performance.

[0047] The embodiments of the present application provide a motor assembly, a movable camera and an electronic device. The driver in the motor assembly is composed of a shape memory film with a shape memory effect. The driver and the movable component are both located in a containing space formed by a base, and the driver is connected to the movable component and the base, respectively. In this way, after being powered on and heated, the shape memory film gradually unfolds. Since the shape memory film has a large specific surface area, it can generate a large thrust, thereby driving the movable component to perform a specific movement. Moreover, since the shape memory film dissipates heat faster, it can quickly return to its initial state under the action of itself or an external force, and also generates a large force in the process. The thrust can drive the movement of a lens in a movable camera, etc., thereby achieving high requirements such as optical image stabilization and fast autofocus speed, so that the performance of the electronic device is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 A schematic diagram of the overall structure of an electronic device provided in an embodiment of the present application;

[0049] Figure 2 for Figure 1 A schematic diagram of the back structure of the electronic device shown;

[0050] Figure 3 for Figure 1 A schematic diagram of the disassembled structure of the electronic device shown;

[0051] Figure 4 An internal circuit diagram of an electronic device provided in an embodiment of the present application;

[0052] Figure 5 A schematic diagram of the motion state change of a shape memory film provided in an embodiment of the present application;

[0053] Figure 6 A schematic diagram of the structure of a shape memory film having three surfaces of different shapes provided in an embodiment of the present application;

[0054] Figure 7 A schematic diagram of the structure of the first driver provided in the embodiment of the present application;

[0055] Figure 8 A schematic diagram of the structure of a second driver provided in an embodiment of the present application;

[0056] Fig. 9 A schematic diagram of the structure of a third driver provided in an embodiment of the present application;

[0057] Fig.10 A schematic diagram of the structure of a fourth driver provided in an embodiment of the present application;

[0058] Fig.11 A schematic diagram of the structure of a fifth driver provided in an embodiment of the present application;

[0059] Fig.12 A schematic diagram of the structure of a sixth driver provided in an embodiment of the present application;

[0060] Fig.13 for Fig.12 The schematic diagram of the motion state change of the drive shown;

[0061] Fig.14 A schematic diagram of the structure of a first motor assembly provided in an embodiment of the present application;

[0062] Fig.15 A schematic diagram of the structure of a second motor assembly provided in an embodiment of the present application;

[0063] Fig.16 A schematic diagram of the structure of a third motor assembly provided in an embodiment of the present application;

[0064] Fig.17 A schematic structural diagram of a fourth motor assembly provided in an embodiment of the present application;

[0065] Fig.18 A schematic structural diagram of a fifth motor assembly provided in an embodiment of the present application;

[0066] Fig.19 A schematic diagram of the structure of a sixth motor assembly provided in an embodiment of the present application;

[0067] Fig. 20 A schematic diagram of the structure of a seventh motor assembly provided in an embodiment of the present application;

[0068] Fig.21 A schematic structural diagram of an eighth motor assembly provided in an embodiment of the present application;

[0069] Fig. 22 A schematic diagram of the structure of a ninth motor assembly provided in an embodiment of the present application;

[0070] Fig.23 A schematic diagram of the structure of a tenth motor assembly provided in an embodiment of the present application;

[0071] Fig.24 A schematic diagram of the structure of an eleventh motor assembly provided in an embodiment of the present application;

[0072] Fig.25 A schematic structural diagram of a twelfth motor assembly provided in an embodiment of the present application;

[0073] Fig.26 A schematic diagram of the structure of a thirteenth motor assembly provided in an embodiment of the present application;

[0074] Fig. 27 A schematic structural diagram of a fourteenth motor assembly provided in an embodiment of the present application;

[0075] Fig.28 A schematic structural diagram of a fifteenth motor assembly provided in an embodiment of the present application;

[0076] Fig.29 A schematic structural diagram of a sixteenth motor assembly provided in an embodiment of the present application;

[0077] Fig.30 A structural schematic diagram of a seventeenth motor assembly provided in an embodiment of the present application;

[0078] Fig.31 A schematic structural diagram of an eighteenth motor assembly provided in an embodiment of the present application;

[0079] Fig.32 A schematic diagram of the structure of a nineteenth motor assembly provided in an embodiment of the present application;

[0080] Fig.33 A schematic diagram of the structure of the twentieth motor assembly provided in an embodiment of the present application;

[0081] Fig.34 For a Fig.33 A diagram showing the relationship between the positions of the movable component and the second rotating shaft;

[0082] Fig.35 A schematic diagram of the structure of a twenty-first motor assembly provided in an embodiment of the present application;

[0083] Fig.36 A schematic diagram of the structure of a twenty-second motor assembly provided in an embodiment of the present application;

[0084] Fig.37 This is a schematic diagram of the structure of the twenty-third motor assembly provided in an embodiment of the present application.

[0085] Reference numerals:

[0086] 100-electronic device; 101-front camera module; 102-screen; 1021-translucent cover; 1022-display; 103-rear camera module; 104-back shell; 1041-back cover; 1042-frame; 105-camera decorative cover; 106-translucent window; 107-installation port; 108-main board; 109-computing control unit; 110-middle board;

[0087] 200-actuator; 1-shape memory film; 11-first sub-shape memory film; 12-second sub-shape memory film; 13-fold line; 2-clamping mechanism; 21-first sub-clamping mechanism; 22-second sub-clamping mechanism; 3-electrode; 31-first electrode; 32-second electrode; D-current; 4-insulating part; H1-first end of the actuator; H2-second end of the actuator; θ-bending angle of the shape memory film;

[0088] 300-motor assembly; 5-support seat; 51-first wall plate; 52-second wall plate; 53-bottom plate; 531-top surface of support seat; 6-movable component; 61-bottom surface of movable component; 601-first body; 602-second body; 603-third body; 71-first moving member; 72-second moving member; 73-third moving member; 8-accessory; 91-first rotating shaft; 92-second rotating shaft; 10-reed; 14-movable part; 15-guide rod; 16-photosensitive chip; 17-PCB. DETAILED DESCRIPTION

[0089] The technical solutions in the embodiments of the present application will be described clearly and in detail below in conjunction with the accompanying drawings. In the description of the embodiments of the present application, unless otherwise specified, " / " means or, for example, A / B can mean A or B; "and / or" in the text is only a description of the association relationship of the associated objects, indicating that there can be three relationships, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone.

[0090] In the following, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as suggesting or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present application, unless otherwise specified, "multiple" means two or more. "At least one" means one or more.

[0091] First, some terms in the embodiments of the present application are explained to facilitate understanding by those skilled in the art.

[0092] 1. Automatic focusing (AF)

[0093] AF means automatically focusing the camera lens on the subject.

[0094] 2. Optical image stabilization (OIS)

[0095] OIS refers to the use of optical components, such as lens settings, in cameras or other similar imaging instruments to reduce instrument jitter that occurs during the process of capturing optical signals, thereby improving image quality.

[0096] The above is a brief introduction to the nouns involved in the embodiments of the present application, which will not be repeated below.

[0097] The present application provides an electronic device, which is a type of electronic device with a shooting function. The embodiments of the present application do not impose any restrictions on the specific types of electronic devices. In some embodiments, the electronic devices of the present application may include mobile phones, wearable devices (such as smart bracelets, smart watches, headphones, etc.), tablet computers, laptop computers, handheld computers, notebook computers, ultra-mobile personal computers (ultra-mobile personal computers, UMPCs), cellular phones, personal digital assistants (personal digital assistants, PDAs), augmented reality (Augmented reality, AR) \ virtual reality (virtual reality, VR) devices and other Internet of Things (IoT) devices, vehicle-mounted electronic devices, and may also be televisions, large screens, printers, projectors and other devices.

[0098] Figure 1 and Figure 2 1 shows a schematic structural diagram of an electronic device 100. Figure 3 for Figure 1 and Figure 2 FIG. 1 is an exploded view of the electronic device 100. Figure 1 is a schematic structural diagram of the front side of the electronic device 100, Figure 2 1 is a schematic diagram of the structure of the back of the electronic device 100. For ease of understanding, the present application embodiment is described by taking the electronic device 100 as a mobile phone as an example.

[0099] like Figures 1 to 3 As shown, the electronic device 100 may include a screen 102 , a back cover 104 and a mainboard 108 .

[0100] Understandably, Figures 1 to 3 Some components of the electronic device 100 are shown, and the actual shapes, actual sizes, actual positions, and actual configurations of these components are not limited. Figures 1 to 3 restrictions.

[0101] The screen 102 is used to display images, videos, etc. The screen 102 may include a transparent cover plate 1021 and a display screen 1022, and the transparent cover plate 1021 and the display screen 1022 are stacked. The transparent cover plate 1021 is mainly used to protect and prevent dust from the display screen 1022, and the material of the transparent cover plate 1021 includes glass, etc.

[0102] The display screen 1022 may be a flexible display screen or a rigid display screen. Exemplarily, the display screen 1022 may be an organic light-emitting diode (OLED) display screen, an active-matrix organic light-emitting diode or an active-matrix organic light-emitting diode (AMOLED) display screen, a mini light-emitting diode display screen, a micro light-emitting diode display screen, a micro-organic light-emitting diode display screen, a quantum dot light emitting diode (QLED) display screen, or a liquid crystal display (LCD) display screen.

[0103] The back shell 104 is used to protect the internal electronic components of the electronic device 100. The back shell 104 may include a back cover 1041 and a frame 1042.

[0104] The back cover 1041 is located on a side of the display screen 1022 away from the light-transmitting cover plate 1021 , and is stacked with the light-transmitting cover plate 1021 and the display screen 1022 .

[0105] The frame 1042 is located between the back cover 1041 and the light-transmitting cover plate 1021, and the frame 1042 is fixed to the back cover 1041. Exemplarily, the frame 1042 can be fixedly connected to the back cover 1041 by adhesive; or, the frame 1042 can be integrally formed with the back cover 1041, that is, the frame 1042 and the back cover 1041 are an integral structure.

[0106] The light-transmitting cover plate 1021 can be fixed on the frame 1042 by adhesive. The light-transmitting cover plate 1021 , the back cover 1041 and the frame 1042 form an internal accommodation space of the electronic device 100 , and the internal accommodation space accommodates the display screen 1022 .

[0107] The mainboard 108 is fixed in the internal accommodation cavity of the electronic device 100. Exemplarily, the mainboard 108 can be fixed to the middle plate 110 by means of threaded connection, snap connection, etc. When the electronic device 100 does not include the middle plate 110, the mainboard 108 can also be fixed to the surface of the display screen 1022 close to the back cover 1041 by means of threaded connection, snap connection, etc.

[0108] like Figures 1 to 3 As shown, the electronic device 100 may further include a front camera module (camera compact module, CCM) 101, a rear camera module 103 and a camera decorative cover 105. In other examples, the electronic device 100 may not include the camera decorative cover 105.

[0109] like Figure 1 As shown, the front camera module 101 can be installed on the upper left portion of the screen 102, and the front camera module 101 can be used for taking selfies.

[0110] like Figure 2 As shown, the rear camera module 103 can be installed on the upper left portion of the back shell 104 , and the rear camera module 103 can be used to capture the scene around the electronic device 100 .

[0111] It should be understood that Figure 1 The installation positions of the front camera module 101 and the rear camera module 103 shown are only schematic, and the present application does not limit the installation positions of the camera modules. In some other embodiments, the front camera module 101 and the rear camera module 103 may also be installed at other positions on the electronic device 100. Exemplarily, the front camera module 101 may be installed in the upper middle part or the upper right part of the screen 102; or, the rear camera module 103 may be installed in the upper middle part or the upper right part of the back shell 104; or, the front camera module 101 or the rear camera module 103 may be set on a movable component in the electronic device 100, and by moving the movable component, the movable component can be hidden in the electronic device 100 or extended out of the electronic device 100.

[0112] It should be understood that Figure 1 The number of front camera modules 101 and rear camera modules 103 installed is only for illustration, and the present application does not limit the number of camera modules installed. The electronic device 100 may include more or fewer camera modules.

[0113] The following description will be made by taking the rear camera module 103 as an example.

[0114] The rear camera module 103 is integrated with a motor, which can be used to realize multiple functions such as AF, OIS and large-angle tracking.

[0115] like Figure 3 As shown, the electronic device 100 may further include a middle plate 110, which is fixed to the inner surface of the frame 1042. For example, the middle plate 110 may be fixed to the frame 1042 by welding; or, the middle plate 110 may be integrally formed with the frame 1042. The rear camera module 103 may be fixed and supported on the middle plate 110 by means of threaded connection, clamping, welding, etc.

[0116] Please refer to Figure 2 and Figure 3 The rear camera module 103 is fixed on the surface of the middle plate 110 close to the back cover 1041 , the light incident surface of the rear camera module 103 faces the back cover 1041 , and a mounting opening 107 is provided on the back cover 1041 .

[0117] The camera decorative cover 105 covers and is fixed to the installation opening 107, and is used to protect the rear camera module 103. In some embodiments, the camera decorative cover 105 protrudes to the side of the back cover 1041 away from the light-transmitting cover plate 1021, thereby, the camera decorative cover 105 can increase the installation space of the rear camera module 103 in the electronic device 100. In other embodiments, the camera decorative cover 105 can also be flush with the back cover 1041 or recessed into the internal accommodation space of the electronic device 100. The camera decorative cover 105 is provided with a light-transmitting window 106, which allows the light of the scene to pass through and enter the light-incident surface of the rear camera module 103.

[0118] See also Figure 4 , Figure 4 for Figures 1 to 3 The electronic device 100 further includes a computing control unit 109. Exemplarily, the computing control unit 109 may be disposed on the mainboard 108. Of course, the computing control unit 109 may also be disposed on other circuit boards in the electronic device 100, for example, on a circuit board where a universal serial bus (USB) device is located. In applications, the computing control unit 109 may be an application processor (AP) and the like.

[0119] The computing control unit 109 can be electrically connected to the rear camera module 103 , and the computing control unit 109 is used to receive and process the electrical signal containing image information from the rear camera module 103 , and the computing control unit 109 is also used to control the motor movement of the rear camera module 103 .

[0120] It should be noted that the rear camera module 103 can be a periscope camera module or a vertical camera module.

[0121] Of course, the electronic device 100 may also include other structures such as a microphone and a speaker, which will not be described one by one here.

[0122] From the above description, we can know that OIS, AF, etc. are common functions of electronic devices when taking photos. In order to realize these functions, a motor is integrated in the movable camera of the electronic device, and the motor can drive some parts of the movable camera to move. Therefore, it can be seen that how to make the motor have thrust and how to make the motor provide greater and better thrust is very important.

[0123] At present, there are shape memory alloy microwires used as drivers to drive motors. But the problem is that the diameter of the shape memory alloy microwires is extremely small, so their relative surface area is large and the heat dissipation is slow, resulting in the shape memory alloy microwire driver having to cool to a certain temperature after a power-on and heat-exertion before the next drive action can be performed. Generally speaking, after a power-on and heat-exertion, the shape memory alloy microwire needs about 100ms-250ms to dissipate heat, resulting in a low movement frequency, for example, the movement frequency is only about 4Hz-10Hz, and the performance is poor.

[0124] Therefore, in the context of today's high requirements for anti-shake, focusing speed, etc., it is necessary to develop new motor drive equipment on the premise of integrating the advantages of shape memory alloy microwire drive to increase its movement frequency and load, etc.

[0125] In view of this, an embodiment of the present application provides a motor assembly, in which a driver is composed of a shape memory film having a shape memory effect, the driver and the movable part are both located in the accommodation space formed by the base, and the driver is connected to the movable part and the base respectively. When the driver is powered on and heated, the shape memory film gradually unfolds, and due to the large specific surface area of ​​the shape memory film, a large thrust can be generated, thereby pushing the movable part to perform a specific movement; and, due to the faster heat dissipation of the shape memory film, it can quickly return to its initial state under the action of itself or an external force, and also generates a large force in the process.

[0126] When the motor assembly provided in the embodiment of the present application is applied to a movable camera, the driver in the motor assembly can generate a large thrust to drive some components in the movable camera, such as the lens, to move, thereby achieving requirements such as optical image stabilization and fast autofocus speed.

[0127] When the movable camera provided in the embodiment of the present application is applied to an electronic device, the performance of the electronic device is better.

[0128] Figure 5 The shape memory film and its driving control principle provided by the embodiments of the present application are shown.

[0129] In applications, the shape memory film may be a shape memory film made of a shape memory material and having a thickness less than a preset thickness.

[0130] The preset thickness of the shape memory film may be less than or equal to 0.5 mm. Optionally, the preset thickness of the shape memory film ranges from 0.2 mm to 0.3 mm. For example, the preset thickness of the shape memory film may be 0.2 mm, 0.22 mm, 0.24 mm, 0.26 mm, 0.28 mm or 0.3 mm.

[0131] The shape memory film has the following characteristics:

[0132] First, the shape memory film has a shape memory effect and can achieve a specific form of movement. Specifically, the shape memory film can be folded along its own fold line and form an angle. At a specific temperature, the shape memory film folds along its own fold line to different degrees, thus forming angles of different angles, and the shape memory film can remember the folding state and angle at the specific temperature.

[0133] In addition, the shape memory film may include a shape memory film with a one-way memory effect and a shape memory film with a two-way memory effect, etc. according to the memory characteristics.

[0134] In practical applications, the temperature affecting the shape memory film may include high temperature and low temperature. The high temperature may be a temperature in the range of 50°C to 200°C, and the low temperature may be a room temperature in the range of about 25°C.

[0135] For example, a shape memory film based on the one-way memory effect can memorize its shape at high temperature. Thus, when the shape memory film is deformed at low temperature and then heated, the shape memory film material reverses to a high-temperature phase, and the deformation of the shape memory film completely disappears, returning to its shape at high temperature before deformation. In the process, a driving force large enough is generated to push objects with a mass far exceeding its own. After that, if the shape memory film is to be returned to its shape at low temperature, external force is required to make it move in the opposite direction.

[0136] Alternatively, a shape memory film based on the one-way memory effect can memorize its shape at low temperatures. Thus, when the shape memory film is deformed at high temperatures and then cooled, the shape memory film material reverses to a low-temperature phase, and the deformation of the shape memory film completely disappears, returning to its shape at low temperatures before deformation. In the process, a driving force large enough is generated to push objects with a mass far exceeding its own. After that, if the shape memory film is to be returned to its shape at high temperatures, external force is required to make it move in the opposite direction.

[0137] Alternatively, a shape memory film based on the two-way memory effect can simultaneously memorize its shapes at high temperatures and low temperatures. Thus, when the shape memory film is deformed at low temperatures and then heated, the shape memory film material reverses to a high-temperature phase, and the deformation of the shape memory film completely disappears, returning to its shape at high temperatures before deformation, and in the process generates a sufficiently large driving force to push objects with a mass far exceeding its own. The shape memory film is then cooled, and the shape memory film material reverses to a low-temperature phase, and the deformation of the shape memory film completely disappears, returning to its shape at low temperatures before deformation, and in the process generates a sufficiently large driving force.

[0138] Second, the shape memory film may include a shape memory alloy film and a shape memory polymer film, etc.

[0139] In applications, shape memory alloys may include nickel-titanium alloys, iron-manganese-silicon alloys, copper-zinc-aluminum alloys, copper-aluminum-nickel alloys and other alloy materials.

[0140] In applications, shape memory polymers may include materials modified from polyethylene, copolyester, polyamide, polyimide, copolyamide, polyurethane, and the like.

[0141] As an example, a thermoplastic polyurethane shape memory polymer may be synthesized at high temperature by bulk polymerization of polyester diol, diisocyanate and chain extender.

[0142] As another example, a thermoplastic epoxy shape memory polymer can be synthesized at high temperature using a difunctional epoxy resin and a chain extender.

[0143] As another example, polyesters such as polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polyethylene terephthalate-1,4-cyclohexanedimethanol (PCTG), and polycarbonate (PC) can be used as raw materials and compositely modified to obtain polyester shape memory polymers.

[0144] On this basis, the shape memory polymer can be mixed with a conductive material to form a shape memory polymer film. The conductive material includes metal powder, conductive polymer, conductive carbon black, etc. Thus, the conductive material can enhance the conductivity of the shape memory polymer film, so that it can better move under the action of electric current and achieve self-heating.

[0145] As an example, in the preparation process of polyurethane shape memory polymer, multi-walled carbon nanotubes (MWNTs) containing carboxyl groups can be uniformly dispersed in a thermoplastic shape memory polyurethane (TPU) pellet solution using a solution method, and then copper (Cu) powder can be mixed into the MWNTs-TPU mixed system to obtain an electro-conductive shape memory polymer film with good conductivity.

[0146] In application, for example, a 295 mg shape memory polymer film folds over when heated and can overturn a 43.5 g aluminum (Al) sheet.

[0147] Third, the shape memory film is a film with a certain area and thickness. For example, the area of ​​the shape memory film can be 1cm 2 about.

[0148] In applications, the shape memory film has an upper surface and a lower surface relative to each other. The upper surface and the lower surface are connected via a thinner surface. The shapes of the upper surface and the lower surface may be the same or different.

[0149] like Figure 6 As shown, the upper surface and the lower surface of the shape memory film 1 have the same shape, which can be as follows Figure 6 The rectangle shown in (a) Figure 6 The trapezoid shown in Figure (b) Figure 6 Any shape such as a circle as shown in Figure (c).

[0150] by Figure 6 Taking the upper and lower surfaces shown in Figure (a) as rectangles as an example, the length and width of the shape memory film 1 are much greater than its thickness. Therefore, compared with the shape memory microwire in the related art, the shape memory film has a larger specific surface area (the sum of the area of ​​the upper and lower surfaces divided by the total volume). Under the same power consumption, the shape memory film has faster heat dissipation and higher movement frequency than the shape memory microwire, and generates greater thrust in the process.

[0151] Please refer to Figure 5 , the motion state of the shape memory film 1 based on the two-way memory effect provided in an embodiment of the present application is introduced in detail.

[0152] like Figure 5 As shown in Figure (a), the shape memory film 1 is divided into a first sub-shape memory film 11 and a second sub-shape memory film 12 according to a fold line 13. In the initial state (low temperature state close to room temperature), the first sub-shape memory film 11 and the second sub-shape memory film 12 are in a bent state with a bending angle of θ1. When powered on and heated, the temperature of the shape memory film 1 increases continuously and gradually undergoes an internal phase change. Based on the shape memory effect, the shape memory film 1 gradually unfolds along the fold line 13 and may go through multiple intermediate states during the unfolding process, for example, Figure 5 The middle state with a bending angle of θ2 is shown in (b). Figure 5 The bending angle shown in Figure (c) is the intermediate state of θ3; the phase transition is finally completed and the Figure 5 The bending angle shown in Figure (d) is the final state of θ4.

[0153] Among them, 0°≤θ1<180°, 0°<θ2<180°, 0°<θ3<180°, 0°<θ4≤180°, and θ1<θ2<θ3<θ4.

[0154] On the other hand, it is still a reference Figure 5 , when the shape memory film 1 is in Figure 5 In the state of the bending angle θ4 shown in Figure (d), after cooling (for example, stopping heating), the shape memory film 1 moves in the opposite direction, that is, gradually compresses, and can go through multiple intermediate states during the compression process, for example, Figure 5 The middle state with a bending angle of θ3 is shown in Figure (c). Figure 5 The bending angle shown in Figure (b) is the intermediate state of θ2; the phase transition is finally completed and returns to Figure 5 The bending angle shown in Figure (a) is the initial state of θ1.

[0155] Optionally, as a feasible method, nickel-titanium alloy has the advantages of good reliability, wide temperature range, fatigue stability under long-term use, and not easy to break, so nickel-titanium alloy is selected as the shape memory film material.

[0156] In applications, the nickel-titanium alloy shape memory film can provide a thrust hundreds of times its own weight when it is heated and stretched. For example, a 12mg nickel-titanium alloy shape memory film can push an Al block of about 2g.

[0157] It should be noted that, in order to achieve a better control effect, two appropriate angles can be selected from the movement process of the shape memory film, for example, Figure 5 The angles θ2 and θ3 shown are respectively used as the starting point and the end point of the shape memory film movement, thereby leaving redundancy. In applications, the shape memory film can achieve angles θ2 and θ3 through processing or specific processes.

[0158] Figures 7 to 13 It shows the various structures of the driver 200 and the driving control principle provided by the embodiment of the present application when the shape memory film is applied to the driver.

[0159] In applications, according to the characteristics of shape memory film that undergoes shape memory deformation when heated, it can be deformed by applying electricity to generate electric heat. For a possible electric drive method, please refer to Figures 7 to 13 .

[0160] As an example, Figure 7As shown, the driver 200 provided in the embodiment of the present application includes: a shape memory film 1, a first sub-clamping mechanism 21, a second sub-clamping mechanism 22, a first electrode 31 and a second electrode 32, the first sub-clamping mechanism 21 clamps the lower surface of the shape memory film 1, the second sub-clamping mechanism 22 clamps the upper surface of the shape memory film 1, the first sub-clamping mechanism 21 and the second sub-clamping mechanism 22 are independent clamping mechanisms; the first electrode 31 and the second electrode 32 are both embedded in the second sub-clamping mechanism 22, and the first electrode 31 and the second electrode 32 are located on the same side of the fold line 13; the first sub-clamping mechanism 21 and the first electrode 31 constitute the first end of the driver, and the second sub-clamping mechanism 22 and the second electrode 32 constitute the second end of the driver.

[0161] Thus, the current D generated by the first electrode 31 flows from the second sub-shape memory film 12 through the fold line 13, the first sub-shape memory film 11, and the fold line 13 in sequence to the second electrode 32, so that the current D flows through the entire shape memory film 1, so that the shape memory film 1 can be deformed along the fold line 13 and change the angle. At this time, the shape memory film 1 dissipates heat faster and moves at a higher frequency. In this process, the driver 200 can generate a greater driving force, which can drive the movable part to move.

[0162] in, Figure 8 is from Figure 7 The schematic diagram of the structure of the driver 200 is shown as being from the right side looking toward the left side.

[0163] It should be noted that the first sub-clamping mechanism can clamp the leftmost end of the lower surface of the shape memory film, and of course can also clamp the entire lower surface of the shape memory film. The second sub-clamping mechanism is similar, and will not be described in detail here.

[0164] Furthermore, the first sub-clamping mechanism and the second sub-clamping mechanism can be connected, which is not specifically limited here. The shape memory film is clamped by the first sub-clamping mechanism and the second sub-clamping mechanism, and the clamping mechanism is also used to connect with other components, ensuring the stability of the shape memory film and its built-in electrode.

[0165] In addition, the clamping mechanism may be insulated, and the electrode may be disposed on the surface of the clamping mechanism, which is not specifically limited here.

[0166] In addition, when the electrode includes a first electrode and a second electrode, the first electrode can be used as a positive electrode, and the second electrode can be used as a negative electrode. Thus, an independent external power supply can be used to energize the electrodes. Of course, the power supply can also be integrated into the driver, and the power supply is not specifically described here.

[0167] As another example, Fig. 9 As shown, Fig. 9 Mid Drive 200 with Figure 7The difference between the MidDrive 200 is: Fig. 9 The first electrode 31 of the middle driver is embedded in the first sub-clamping mechanism 21 , and the second electrode 32 is embedded in the second sub-clamping mechanism 22 . The first electrode 31 and the second electrode 32 are located on different sides of the fold line 13 .

[0168] Thus, the current D generated by the first electrode 31 flows from the first sub-shape memory film 11 through the fold line 13 and the second sub-shape memory film 12 in sequence and then flows to the second electrode 32, so that the current D flows through the entire shape memory film 1, so that the shape memory film 1 can be deformed along the fold line 13 and change the angle. At this time, the shape memory film 1 dissipates heat faster and moves at a higher frequency. In this process, the driver 200 can generate a greater driving force, which can drive the movable part to move.

[0169] As another example, Fig.10 As shown, Fig.10 Mid Drive 200 with Figure 7 The difference between the driver 200 and the shape memory film 1 is that the driver 200 further includes an insulating portion 4, the insulating portion 4 is embedded in the shape memory film 1, and the insulating portion 4 is disposed along the shape memory film 1. Fig.10 The ox direction is shown as being across the fold line 13 .

[0170] Thus, the insulating part 4 can guide the flow of current D. Even when the area of ​​the shape memory film 1 is large, the current D generated by the first electrode 31 can also flow to the second electrode 32 via the shortest path from the second sub-shape memory film 12 through the fold line 13, the first sub-shape memory film 11, and the fold line 13 in sequence, so that the current D flows through the entire shape memory film 1, ensuring that the first sub-shape memory film 11 and the second sub-shape memory film 12 can be deformed, and the overall heating effect of the shape memory film 1 is better, thereby ensuring that the shape memory film 1 dissipates heat faster and has a higher movement frequency. In this process, the driver 200 can generate a greater driving force, which can drive the movable part to move.

[0171] in, Fig.11 is from Fig.10 The schematic diagram of the structure of the driver 200 is shown as being from the right side looking toward the left side.

[0172] For the convenience of drawing and explanation, Figures 7 to 11 The first sub-clamping mechanism 21 and the first electrode 31 of the driver are integrated into the first end H1 of the driver. Figures 7 to 11 The second sub-clamping mechanism 22 and the second electrode 32 of the middle driver are integrated into the second end H2 of the driver, and the Fig.12 The drive 200 is shown.

[0173] Fig.13The motion state change of the actuator 200 based on the shape memory film 1 is shown.

[0174] like Fig.13 As shown in Figure (a), the first end H1 of the driver and the second end H2 of the driver are not powered on for heating. In the initial state (low temperature state close to room temperature), the first sub-shape memory film 11 and the second sub-shape memory film 12 are in a bent state with a bending angle of θ1. When the first end H1 of the driver and the second end H2 of the driver are powered on for heating, the temperature of the first sub-shape memory film 11 and the second sub-shape memory film 12 increases continuously, and an internal phase change gradually occurs. Based on the shape memory effect, the first sub-shape memory film 11 and the second sub-shape memory film 12 gradually unfold along the fold line 13, and experience multiple intermediate states during the unfolding process, for example, Fig.13 The middle state with a bending angle of θ2 is shown in (b). Fig.13 The intermediate state with a bending angle of θ3 shown in Figure (c) and so on; the phase transition is finally completed and the final state is reached, that is, Fig.13 The figure (d) shows a state where the bending angle is θ4.

[0175] In turn, please refer to Fig.13 ,exist Fig.13 In the state of the bending angle θ4 shown in Figure (d), the first end H1 of the driver and the second end H2 of the driver are stopped from being powered on and heated. At this time, the first sub-shape memory film 11 and the second sub-shape memory film 12 begin to cool down. The first sub-shape memory film 11 and the second sub-shape memory film 12 move in opposite directions along the fold line 13, that is, they are gradually compressed, and they go through multiple intermediate states during the compression process, for example, Fig.13 The middle state shown in Figure (c) is the bending angle of θ3. Fig.13 The bending angle shown in Figure (b) is the intermediate state of θ2; finally returning to Fig.13 The bending angle shown in Figure (a) is the initial state of θ1.

[0176] It should be noted that when the driver is used in a movable camera, for example, when the lens in the movable camera is driven, the position of the shape memory film, the angle between the first sub-shape memory film and the second sub-shape memory film, etc. will affect the position of the lens. In order to facilitate control, the driver can be trained according to the position where the lens may need to be, so that the driver can achieve a specific angle at a specific temperature and memorize the specific angle that needs to be memorized, so that the installation position of the driver in the movable camera can be determined, and after the driver is installed, a specific current is passed to the driver to change the angle between the first sub-shape memory film and the second sub-shape memory film to drive the lens to a specific position, so as to take pictures in real time according to the position of the lens.

[0177] One possible way to realize the position of the above-mentioned shape memory film is through resistance detection. Specifically, when the first sub-shape memory film and the second sub-shape memory film are deformed with temperature changes, the phase inside the shape memory film will also change, and its resistance will also change accordingly. Then, by real-time detection of the current and voltage at the first and second ends of the shape memory film, the resistance can be calculated to reversely confirm the position of the shape memory film. Of course, position detection can also be performed through additional position sensors, such as Hall sensors, TMR sensors, etc.

[0178] First case:

[0179] Example 1 (reference Figures 14 to 37 The motor assembly 300 can swing back and forth based on the fixed point of the connection)

[0180] Figures 14 to 37 It shows the motor assembly 300 of various structures and its driving control principle and effect provided by the embodiment of the present application when the driver is applied to the motor assembly.

[0181] Figures 14 to 22 A variety of rotary motor assemblies 300 with different structures driven by the shape memory film 1 are shown.

[0182] As an example, Fig.14 As shown, the motor assembly 300 provided in the embodiment of the present application includes: a movable component 6, a support base 5 and two drivers.

[0183] Among them, the support seat 5 is used as the structural "skeleton" of the motor assembly 300, which is used to support and fix the movable parts 6 and the driver, etc. in the motor assembly 300. Usually, when the motor assembly 300 is installed in the electronic device 100, the support seat 5 is fixed to the structural "skeleton" of the electronic device 100. The support seat 5 includes a bottom plate 53, a first wall plate 51 and a second wall plate 52. The first wall plate 51 and the second wall plate 52 are arranged opposite to each other, and the first wall plate 51 is connected to the second wall plate 52 through the bottom plate 53. In this way, the bottom plate 53, the first wall plate 51 and the second wall plate 52 enclose a storage space, and the movable parts 6 and the driver, etc. are placed in the storage space. The material of the support seat 5 includes but is not limited to metal and plastic. The support seat 5 can be a rectangular frame, a cube frame, etc.

[0184] A pair of shape memory film actuators are placed facing each other on opposite sides of the movable part 6 and at a specific initial angle. The first end H1 of the actuator located on the left side of the movable part 6 is connected to the movable part 6, and the second end H2 of the actuator is fixed to the first wall plate 51. The first end H1 of the actuator located on the right side of the movable part 6 is connected to the movable part 6, and the second end H2 of the actuator is fixed to the second wall plate 52.

[0185] The bottom surface 61 of the movable component is an arc surface, the top surface 531 of the support seat is a plane, and a portion of the bottom surface 61 of the movable component is directly connected to the top surface 531 of the support seat.

[0186] In applications, when the motor assembly includes three or more drivers, all drivers can be symmetrically distributed on multiple sides of the movable part, or asymmetrically distributed on multiple sides of the movable part. In this way, even for a shape memory film with only a one-way memory effect, after being deformed to a memory state, it can be restored to its initial state through the external force applied by the drivers on other sides. Optionally, the number of drivers can be set to an even number, and an even number of drivers can be symmetrically distributed on both sides of the movable part, which not only simplifies the structural design, but also makes the force more balanced and drives the movement of the movable part more controllable.

[0187] The motor assembly can be used in various scenarios such as movable cameras, valves, and whole-machine vibration motors. The movable part is a part that can move in the motor assembly, and the movement here can include rotation, sliding, etc. When the motor assembly is used in a movable camera and uses the autofocus function, the movable part may include a lens, a lens carrier, etc.; or, when the motor assembly is used in a movable camera and uses the anti-shake function, the movable part may be a lens, a lens carrier, a sensor, etc.; or, when the motor assembly is used in a valve, the movable part may be a valve switch, a valve flow control device, etc.

[0188] Optionally, a magnetic member may be provided between the movable component and the support seat to improve the movement stability. The magnetic member may include a magnet, etc., which may exert a magnetic attraction.

[0189] Therefore, if the left driver is powered on and heated, the shape memory film 1 in the driver gradually expands, generating a large thrust, pushing the other parts of the movable component 6 except the part connected to the top surface 531 of the support seat to move along the inner side of the accommodating space. Fig.14 The shape memory film 1 in the right driver is compressed, and if the heating is stopped, the shape memory film 1 in the left driver dissipates heat faster and can quickly recover under the action of its own or external force; on the contrary, if the right driver is powered on and heated, the shape memory film 1 in the driver gradually expands, generating a large thrust, pushing the other parts of the movable component 6 except the part connected to the top surface 531 of the support seat to move along the inner side of the accommodating space. Fig.14The shape memory film 1 in the left driver is compressed when the motor assembly swings in the direction of the arrow on the left side. If the heating stops, the shape memory film 1 in the left driver will dissipate heat faster and can quickly recover under the action of itself or external force. In this way, the movable component 6 can achieve clockwise or counterclockwise rotation within a certain angle in the accommodation space, so that when the motor assembly is used in the movable camera, it can drive some components in the movable camera, such as the lens, to move, thereby achieving high requirements such as optical image stabilization and fast autofocus speed.

[0190] As another example, Fig.15 As shown, Fig.15 The motor assembly 300 and Fig.14 The difference between the motor assembly 300 is that the bottom surface 61 of the movable part is a curved surface, and the top surface 531 of the support seat is a concave surface.

[0191] Therefore, if the left driver is powered on and heated, the shape memory film 1 in the driver gradually expands, generating a large thrust, and since only a small part of the bottom surface 61 of the arc-shaped movable component is connected to the top surface 531 of the concave support seat, most of the movable component 6 except the part connected to the top surface 531 of the support seat can be pushed to move along the inner side of the accommodation space. Fig.14 The shape memory film 1 in the right driver is compressed at this time, and if the heating is stopped, the shape memory film 1 in the left driver dissipates heat faster and can quickly recover under the action of its own or external force; on the contrary, if the right driver is powered on and heated, the shape memory film 1 in the driver gradually expands, generating a large thrust, and since only a small part of the bottom surface 61 of the arc-shaped movable part is connected to the top surface 531 of the concave support seat, most of the movable part 6 except the part connected to the top surface 531 of the support seat can be pushed along the accommodating space. Fig.14 The shape memory film 1 in the left driver is compressed, and if the heating stops, the shape memory film 1 in the left driver will dissipate heat faster, and can quickly recover under the action of itself or external force. In this way, the movable component 6 can achieve clockwise or counterclockwise rotation within a certain angle in the accommodation space, so that when the motor assembly is used in a movable camera, it can achieve high requirements such as optical image stabilization and fast autofocus speed, and the performance of the electronic device is better.

[0192] As another example, Fig.16 As shown, Fig.16 The motor assembly 300 and Fig.15 The difference of the motor assembly 300 is that the bottom surface 61 of the arc-shaped movable part and the top surface 531 of the concave support seat are connected by three first movable members 71, and the first movable members 71 are fixed on the top surface 531 of the concave support seat.

[0193] In applications, the first moving member may include a ball or the like, and the shape of the ball may be spherical, ellipsoidal, or the like.

[0194] Therefore, if the left-side driver is powered on and heated, the shape memory film 1 in the driver gradually unfolds, generating a large thrust, and under the guidance of the concave top surface 531 of the support seat as a guide rail, the movable component 6 is pushed to swing to the other side on the support track of the first movable component. The first movable component allows the movable component to move better in a straight line direction without tilting, etc., which does not affect the imaging effect.

[0195] As another example, Fig.17 As shown, Fig.17 The motor assembly 300 and Fig.15 The difference of the motor assembly 300 is that an accessory 8 is fixed on the surface of the movable part 6 facing the two drivers, and the first end H1 of the driver is connected to the accessory 8.

[0196] Therefore, the attachment 8 can ensure that the driver is tightly connected to the movable component in real time, so as to better transmit the larger thrust generated by the deformation of the driver to the movable component.

[0197] As another example, Fig.18 As shown, Fig.18 The motor assembly 300 and Fig.15 The difference between the motor assembly 300 and the embodiment is that a first rotating shaft 91 runs through the movable component 6 , and the first rotating shaft 91 is fixed to the bottom plate 53 .

[0198] Optionally, in order to better fix and facilitate the rotation of the movable component, the first rotating shaft 91 runs through the middle of the movable component 6 .

[0199] Therefore, by further fixing the movable part through the first rotating shaft, the movement stability of the movable part can be improved, so that the movable part only rotates without moving in position. In this way, if the motor assembly falls off from the electronic device during subsequent use, the motor assembly can still work normally.

[0200] As another example, Fig.19 As shown, Fig.19 The motor assembly 300 and Fig.15 The difference between the motor assembly 300 is that a reed 10 is provided between the movable component 6 and the first wall plate 51 and the second wall plate 52 respectively.

[0201] Of course, the spring leaf 10 may be provided only between the movable component 6 and the first wall plate 51 , or between the movable component 6 and the second wall plate 52 .

[0202] In applications, the reed may include a voice coil motor (VCM) spring, etc., wherein the inner ring of the VCM spring is fixed to the movable part, and the outer ring is connected to the fixed part, so that when the movable part moves, the VCM spring can provide a restoring force.

[0203] Therefore, the movable component can be connected to the support seat through the spring. Once deformation occurs, some springs are compressed and some are stretched. When the power heating is canceled, the spring has a rapid rebound force, and the tension of the spring can quickly pull the movable component back to its original position.

[0204] Will Figures 14 to 19 Integrate all the components in Fig. 20 The ball rotary motor shown is driven by a shape memory film 1 .

[0205] Refer to Fig.21 The first ends H1 of the two drivers are well connected to the support seat 5 through the accessories 8, and the movable part 6 is connected to the first wall plate 51 and the second wall plate 52 through the spring 10. The movable part 6 is connected to the bottom plate 53 through the first rotating shaft 91. At this time, the left driver is powered on and heated, and the shape memory film 1 gradually unfolds. Under the guidance of the concave top surface 531 of the support seat as a guide rail, the larger thrust generated by the left driver pushes the movable part 6 to swing to the right without moving in position, and the shape memory film 1 in the right driver is compressed.

[0206] Refer to Fig. 22 As shown, the first ends H1 of the two drivers are well connected to the support seat 5 through the accessories 8, the movable part 6 is connected to the first wall plate 51 and the second wall plate 52 through the spring 10, and the movable part 6 is connected to the bottom plate 53 through the first rotating shaft 91. At this time, the right driver is powered on and heated, and the shape memory film 1 gradually unfolds. Under the guidance of the concave top surface 531 of the support seat as a guide rail, the larger thrust generated by the right driver pushes the movable part 6 to swing to the left without moving in position, and the shape memory film 1 in the left driver is compressed.

[0207] Second case:

[0208] Example 2 (reference Figures 23 to 32 The linear motor assembly 300, wherein Figure 23 to Figure 27 The motor assembly 300 can move horizontally in a direction parallel to the bottom plate 53, Figure 28 to Figure 32 The motor assembly 300 is capable of vertical movement in a direction perpendicular to the base plate 53).

[0209] Figure 23 to Figure 27A plurality of linear motor assemblies 300 with different structures driven by the shape memory film 1 are shown. The linear motor assemblies 300 can move linearly in a direction parallel to the base plate 53 .

[0210] As an example, Fig.23 As shown, the motor assembly 300 provided in the embodiment of the present application includes: a movable component 6, a support seat 5, two drivers, a movable part 14 and a guide rod 15.

[0211] Among them, the support seat 5 can refer to Fig.14 , I will not go into details here.

[0212] A pair of shape memory film actuators are placed facing each other on opposite sides of the movable part 6 and at a specific initial angle. The first end H1 of the actuator located on the left side of the movable part 6 is connected to the movable part 6, and the second end H2 of the actuator is fixed to the first wall plate 51. The first end H1 of the actuator located on the right side of the movable part 6 is connected to the movable part 6, and the second end H2 of the actuator is fixed to the second wall plate 52.

[0213] The bottom surface 61 of the movable component is a plane, and the top surface 531 of the support seat is a plane. The bottom surface 61 of the movable component is directly connected to the top surface 531 of the support seat. The movable component 6 has a first body 601, a second body 602 and a third body 603. The first body 601 is connected to the third body 603 through the second body 602. Fig.23 In the ox direction, the width of the second body 602 is smaller than the width of the first body 601 and the width of the third body 603, the guide rod 15 is fixed between the first body 601 and the third body 603, and does not contact the second body 602, and the movable part 14 is sleeved on the guide rod 15 and connected to the second body 602.

[0214] It should be noted that the above-mentioned movable part can also rotate.

[0215] In application, the guide rod may also contact the second body, and the movable part may be slidably fixed on the guide rod, which is not specifically limited here.

[0216] Therefore, if the left driver is powered on and heated, the shape memory film 1 in the driver gradually expands, generating a large thrust, pushing the entire movable component 6 along the accommodating space. Fig.23 The arrow shown in the figure moves to the right, at which time the shape memory film 1 in the right driver is compressed, and if the heating is stopped, the shape memory film 1 in the left driver dissipates heat faster and can quickly recover under the action of itself or external force; on the contrary, if the right driver is powered on and heated, the shape memory film 1 in the driver gradually expands, generating a large thrust, pushing the entire movable component 6 along the accommodating space. Fig.23The arrow shown moves to the left, and the shape memory film 1 in the left driver is compressed. If the heating stops, the shape memory film 1 in the left driver will dissipate heat faster and can quickly recover under the action of itself or external force. In this way, the movable component 6 can move left or right in a certain direction within the accommodation space, so that when the motor assembly is used in a movable camera, it can achieve high requirements such as optical image stabilization and fast autofocus speed, and the performance of the electronic device is better.

[0217] As another example, Fig.24 As shown, Fig.24 The motor assembly 300 and Fig.23 The difference of the motor assembly 300 is that the bottom surface 61 of the flat movable part and the top surface 531 of the flat support base are connected by six second movable members 72, and the second movable members 72 are fixed on the top surface 531 of the support base.

[0218] In applications, the second moving member may include a ball or the like, and the shape of the ball may be spherical, ellipsoidal, or the like.

[0219] It should be noted that the second moving member may also be replaced by a guide rail or the like to improve the stability of the movement.

[0220] Therefore, if the left-side driver is powered on and heated, the shape memory film 1 in the driver gradually unfolds, generating a large thrust, and under the guidance of the flat top surface 531 of the support seat as a guide rail, the movable component 6 is pushed to the right along the support track of the second movable component. The second movable component allows the movable component to move better in a straight line direction without tilting, etc., which does not affect the imaging effect.

[0221] As another example, Fig.25 As shown, Fig.25 The motor assembly 300 and Fig.23 The difference between the motor assembly 300 is that a reed 10 is provided between the movable component 6 and the first wall plate 51 and the second wall plate 52 respectively.

[0222] Of course, the spring leaf 10 may be provided only between the movable component 6 and the first wall plate 51 , or between the movable component 6 and the second wall plate 52 .

[0223] Therefore, the movable component can be connected to the support seat through the spring. Once deformation occurs, some springs are compressed and some are stretched. When the power heating is canceled, the spring has a rapid rebound force, and the tension of the spring can quickly pull the movable component back to its original position.

[0224] Will Figure 23 to Figure 25 Integrate all the components in Fig.26 The ball linear motor shown is driven by a shape memory film 1 .

[0225] Refer to Fig. 27 The first ends H1 of the two actuators are well connected to the guide rod 15 through the movable part 14, and the movable part 6 is connected to the first wall plate 51 and the second wall plate 52 through the spring 10. At this time, the right actuator is powered on and heated, and the shape memory film 1 gradually unfolds, and the bending angle becomes larger. Under the guidance of the top surface 531 of the flat support seat as a guide rail, the shape memory film 1 is gradually unfolded and the bending angle becomes larger. Fig. 27 In the ox direction shown, the movable part 6 is pushed to move leftward along the ball track movement as shown by the arrow, and the left driver is pushed in the opposite direction, so that the shape memory film 1 in the left driver is compressed, so that the shape memory film 1 can be driven to reciprocate by the back-and-forth antagonistic motion.

[0226] Figure 28 to Figure 32 A plurality of linear motor assemblies 300 with different structures driven by the shape memory film 1 are shown. The linear motor assemblies 300 can move linearly in a direction perpendicular to the base plate 53 .

[0227] As an example, Fig.28 As shown, the motor assembly 300 provided in the embodiment of the present application includes: a movable component 6, a support base 5 and two drivers.

[0228] Among them, the support seat 5 can refer to Fig.14 , I will not go into details here.

[0229] A pair of shape memory film actuators are placed facing each other on opposite sides of the movable component 6 and at a specific initial angle. The first end H1 of the actuator located on the left side of the movable component 6 is connected to the bottom surface 61 of the movable component, and the second end H2 of the actuator is fixed to the first wall plate 51. The first end H1 of the actuator located on the right side of the movable component 6 is connected to the bottom surface 61 of the movable component, and the second end H2 of the actuator is fixed to the second wall plate 52.

[0230] Therefore, if the left and right actuators are powered on and heated, the shape memory films 1 in the two actuators gradually unfold, generating a large thrust, pushing the entire movable component 6 along the accommodating space. Fig.28 The arrow shown in FIG. 1 moves upward. If the heating is stopped, the shape memory film 1 dissipates heat faster. The shape memory films 1 in the two actuators can be compressed after quickly recovering to a state under the action of themselves or external forces, so that the entire movable component 6 moves along the accommodating space. Fig.28 The arrow shown moves downward. In this way, the movable component 6 can move upward or downward in a certain direction within the accommodation space, so that when the motor assembly is used in a movable camera, high requirements such as optical image stabilization and fast autofocus speed can be achieved, and the performance of the electronic device is better.

[0231] As another example, Fig.29 As shown, Fig.29 The motor assembly 300 and Fig.28 The difference between the motor assembly 300 is that the first wall plate 51 and the movable part 6 are connected by two third movable members 73, and the second wall plate 52 and the movable part 6 are connected by two third movable members 73.

[0232] In application, the third moving member may include a ball, etc., and the shape of the ball may be spherical, ellipsoidal, etc. The number of the third moving member is not specifically limited, and it shall be determined by actual application.

[0233] Therefore, if the left-side driver and the right-side driver are powered on and heated, the shape memory film 1 gradually unfolds and generates a large thrust. Under the guidance of the wall panel as a guide rail, the movable component 6 is pushed upward on the support track of the third movable component. The third movable component allows the movable component to move better in a straight line direction without tilting, etc., which does not affect the imaging effect.

[0234] As another example, Fig.30 As shown, Fig.30 The motor assembly 300 and Fig.28 The difference of the motor assembly 300 is that an accessory 8 is fixed on the surface of the movable part 6 facing the two drivers, and the first end H1 of the driver is connected to the accessory 8.

[0235] Therefore, the attachment 8 can ensure that the driver is tightly connected to the movable component in real time, so as to better transmit the larger thrust generated by the deformation of the driver to the movable component.

[0236] As another example, Fig.31 As shown, Fig.31 The motor assembly 300 and Fig.28 The difference between the motor assembly 300 is that a reed 10 is arranged between the movable part 6 and the base plate 53.

[0237] Therefore, the movable component can be connected to the support seat through the spring. Once deformation occurs, some springs are compressed and some are stretched. When the power heating is canceled, the spring has a rapid rebound force, and the tension of the spring can quickly pull the movable component back to its original position.

[0238] Will Figure 28 to Figure 31 Integrate all the components in Fig.32 The ball linear motor shown is driven by a shape memory film 1 .

[0239] It should be noted that Fig.32The motor assembly 300 shown may also be provided with a photosensitive chip 16, a printed circuit board (PCB) 17, etc. Fig.32 In the embodiment, the PCB 17 is arranged on the base plate 53 , and the photosensitive chip 16 is arranged on the PCB 17 .

[0240] Refer to Fig.32 The first ends H1 of the two drivers are well connected to the movable part 6 through the attachment 8, the bottom surface of the movable part 6 is connected to the photosensitive chip 16 through the spring 10, and the sides of the movable part 6 are connected to the wall panels through the ball bearings. At this time, the two drivers are powered on and heated, and the shape memory film 1 gradually unfolds. Under the guidance of the flat wall panel as a guide rail, the large thrust generated by the driver pushes the movable part 6 to move upward.

[0241] The third case:

[0242] Example 3 (reference Figure 33 to Figure 37 The rotary motor assembly 300 is capable of rotating along a rotating shaft).

[0243] Figure 33 to Figure 37 A variety of rotary motor assemblies 300 with different structures driven by the shape memory film 1 are shown.

[0244] As an example, Fig.33 As shown, the motor assembly 300 provided in the embodiment of the present application includes: a movable component 6, a support seat 5, two drivers and a second rotating shaft 92.

[0245] Among them, the support seat 5 can refer to Fig.14 , I will not go into details here.

[0246] A pair of shape memory film actuators are placed facing each other on opposite sides of the movable part 6 and at a specific initial angle. The first end H1 of the actuator located on the left side of the movable part 6 is connected to the movable part 6, and the second end H2 of the actuator is fixed to the first wall plate 51. The first end H1 of the actuator located on the right side of the movable part 6 is connected to the movable part 6, and the second end H2 of the actuator is fixed to the second wall plate 52.

[0247] The second rotating shaft 92 is sleeved in the movable component 6. One way is as follows: Fig.34 As shown, the second rotating shaft 92 is connected to the first wall plate 51 and the second wall plate 52 respectively.

[0248] Therefore, if the left driver is powered on and heated, the shape memory film 1 in the driver gradually expands, generating a large thrust, pushing the movable component 6 along the accommodating space. Fig.33The shape memory film 1 in the right driver rotates around the second rotating shaft 92 in the direction of the arrow shown. At this time, the shape memory film 1 in the right driver is compressed, and if the heating is stopped, the shape memory film 1 in the left driver dissipates heat faster and can quickly recover under the action of itself or external force; on the contrary, if the right driver is powered on and heated, the shape memory film 1 in the driver gradually expands, generates a large thrust, and pushes the movable component 6 along the accommodating space. Fig.33 The shape memory film 1 in the left driver is compressed, and if the heating stops, the shape memory film 1 in the left driver will dissipate heat faster, and can quickly recover under the action of itself or external force. In this way, the movable component 6 can achieve rotational movement around the second rotation axis 92 in the accommodation space, so that when the motor assembly is used in a movable camera, it can achieve high requirements such as optical image stabilization and fast autofocus speed, and the performance of the electronic device is better.

[0249] As another example, Fig.35 As shown, Fig.35 The motor assembly 300 and Fig.33 The difference of the motor assembly 300 is that an accessory 8 is fixed on the surface of the movable part 6 facing the two drivers, and the first end H1 of the driver is connected to the accessory 8.

[0250] Therefore, the attachment 8 can ensure that the driver is tightly connected to the movable component in real time, so as to better transmit the larger thrust generated by the deformation of the driver to the movable component.

[0251] As another example, Fig.36 As shown, Fig.36 The motor assembly 300 and Fig.33 The difference between the motor assembly 300 is that a reed 10 is provided between the movable component 6 and the first wall plate 51 and the second wall plate 52 respectively.

[0252] Of course, the spring leaf 10 may be provided only between the movable component 6 and the first wall plate 51 , or between the movable component 6 and the second wall plate 52 .

[0253] Thus, the reed can ensure that the movable component does not rotate when not in operation, and when the power-on heating is canceled, the reed can increase the resetting speed of the movable component.

[0254] Will Figure 33 to Figure 36 Integrate all the components in Fig.37 The shaft rotation motor shown is driven by a shape memory film 1 .

[0255] Refer to Fig.37The first ends H1 of the two drivers are well connected to the support seat 5 through the accessories 8, the movable part 6 is connected to the first wall plate 51 and the second wall plate 52 through the spring 10, and the movable part 6 is connected to the first wall plate 51 and the second wall plate 52 through the second rotating shaft 92. At this time, the left driver is powered on and heated, and the shape memory film 1 gradually unfolds. The larger thrust generated by the left driver pushes the movable part 6 to rotate around the central second rotating shaft 92, and the shape memory film 1 in the right driver is compressed.

[0256] It should be understood that the above is only to help those skilled in the art better understand the embodiments of the present application, and is not intended to limit the scope of the embodiments of the present application. Based on the above examples given, those skilled in the art can obviously make various equivalent modifications or changes, for example, some steps in each embodiment of the method may be non-essential, or some new steps may be added, etc.; or a combination of any two / multiple embodiments described above. Such modified, changed or combined solutions also fall within the scope of the embodiments of the present application.

[0257] It should also be understood that the above description of the embodiments of the present application focuses on emphasizing the differences between the various embodiments. The same or similar points that are not mentioned can be referenced to each other. For the sake of brevity, they will not be repeated here.

[0258] It should also be understood that the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0259] It should also be understood that the division of the methods, situations, categories and embodiments in the embodiments of the present application is only for the convenience of description and should not constitute a special limitation. The features of various methods, categories, situations and embodiments can be combined without contradiction.

[0260] It should also be understood that in the various embodiments of the present application, unless otherwise specified or there is a logical conflict, the terms and / or descriptions between different embodiments are consistent and can be referenced to each other, and the technical features in different embodiments can be combined to form new embodiments according to their internal logical relationships.

[0261] Finally, it should be noted that the above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A motor assembly, characterized in that: include: A movable component, a support seat and a plurality of drivers, wherein the support seat comprises a bottom plate and at least one wall plate, the wall plate is connected to the bottom plate and defines a storage space, the movable component and the driver are located in the storage space, at least one driver is arranged on one side of the movable component, the driver comprises a shape memory polymer film, a clamping mechanism, an electrode and an insulating portion, the clamping mechanism clamps the shape memory polymer film and constitutes a first end and a second end of the driver, the electrode is located in the clamping mechanism and contacts the shape memory polymer film, the electrode is used to generate different currents, the electrode comprises a first electrode and a second electrode, the polarity of the first electrode is opposite to that of the second electrode, and the first electrode and the The second electrode is located at the same end of the clamping mechanism; the shape memory polymer film is folded along the fold line to form an angle, the shape memory polymer film on one side of the fold line has a first end of the driver, and the shape memory polymer film on the other side of the fold line has a second end of the driver, the first end is connected to the movable part, and the second end is connected to the support seat, the insulating part is embedded in the shape memory polymer film and spans the fold line, the driver is used to deform the shape memory polymer film along the fold line under the action of different currents, and when the angle is changed, drive the movable part to move, and when deformed to a memory state, restore it to an initial state through the external force applied by the driver on the other side; At least a portion of the surface of the movable component facing the bottom plate is connected to the bottom plate, the second end of the driver is connected to the wall plate, and the driver is used to drive the portion of the movable component other than the portion connected to the bottom plate to swing when the shape memory polymer film is deformed along the fold line under the action of different currents and the angle is changed; Alternatively, at least a portion of the surface of the movable component facing the bottom plate is connected to the bottom plate, the second end of the driver is connected to the wall plate, and the driver is used to drive the movable component to move linearly as a whole when the shape memory polymer film is deformed along the fold line and the angle is changed under the action of different currents; Alternatively, the side of the movable component facing the base plate is not in contact with the base plate, the motor assembly also includes a second rotating shaft, the second rotating shaft is fixed to the wall plate, the movable component is connected to the wall plate via the second rotating shaft, and the driver is used to drive the movable component to rotate around the second rotating shaft when the shape memory polymer film is deformed along the fold line and the angle is changed under the action of different currents.

2. The motor assembly according to claim 1, characterized in that When the driver is used to deform the shape memory polymer film along the fold line and change the angle under the action of different currents, and drives the part of the movable component except the connection with the bottom plate to swing, the surface of the movable component facing the bottom plate is a curved surface, and the surface of the bottom plate facing the movable component is a concave surface, and the motor assembly further includes a first movable member, which is fixed to the bottom plate, and the movable component is connected to the bottom plate through the first movable member; Alternatively, the surface of the movable component facing the bottom plate is a curved surface, the surface of the bottom plate facing the movable component is a flat surface, and the movable component is directly connected to the bottom plate.

3. The motor assembly according to claim 2, characterized in that: When the driver is used to deform the shape memory polymer film along the fold line and change the angle under the action of different currents, and drive the part of the movable component except the connection with the base plate to swing, the motor assembly also includes a first rotating shaft, which passes through the movable component in a direction perpendicular to the base plate, and the first rotating shaft is fixed to the base plate.

4. The motor assembly according to claim 1, characterized in that: The second end of the driver is connected to the wall panel, and the driver is used to cause the shape memory polymer film to deform along the fold line under the action of different currents, and when the angle is changed, drive the movable component to move linearly as a whole. The motor assembly also includes a guide rod and a movable part, the guide rod is fixed on the movable component, and the movable part is movable on the guide rod. The first end of the driver is connected to the movable part, and the second end of the driver is connected to the wall panel. The driver is used to cause the shape memory polymer film to deform along the fold line under the action of different currents, and when the angle is changed, drive the movable component to move as a whole in a direction parallel to the base plate.

5. The motor assembly according to claim 4, characterized in that: The second end of the driver is connected to the wall panel. The driver is used to deform the shape memory polymer film along the fold line and change the angle under the action of different currents. When the driver drives the movable component to move in a straight line as a whole, the surface of the movable component facing the bottom plate is a plane, and the surface of the bottom plate facing the movable component is a plane. The motor assembly also includes a second movable member, which is fixed to the bottom plate, and the movable member is connected to the bottom plate through the second movable member.

6. The motor assembly according to claim 1, characterized in that The second end of the driver is connected to the wall panel, and the driver is used to cause the shape memory polymer film to deform along the fold line under the action of different currents, and when the angle is changed, the movable component is driven to move in a straight line as a whole. The movable component is separated from the base plate and arranged at intervals. The first end of the driver is connected to the surface of the movable component close to the base plate. The driver is used to cause the shape memory polymer film to deform along the fold line under the action of different currents, and when the angle is changed, the movable component is driven to move in a direction perpendicular to the base plate as a whole.

7. The motor assembly according to claim 6, characterized in that The motor assembly also includes a third movable member, which is connected to the wall panel at the second end of the driver. The driver is used to cause the shape memory polymer film to deform along the fold line and change the angle under the action of different currents, while driving the movable component to move in a straight line as a whole. The third movable member is fixed to the wall panel, and the movable component is connected to the wall panel through the third movable member.

8. The motor assembly according to any one of claims 1 to 7, characterized in that: The wall plate comprises a first wall plate and a second wall plate, the first wall plate is connected to the second wall plate through the bottom plate, and the first wall plate, the bottom plate and the second wall plate define the accommodation space; The number of the drivers is an even number, and the even number of drivers are symmetrically distributed on both sides of the movable component. The second end of the driver located on one side of the movable component is connected to the first wall panel, and the second end of the driver located on the other side of the movable component is connected to the second wall panel.

9. The motor assembly according to any one of claims 1 to 7, characterized in that: The motor assembly further comprises at least one accessory, the accessory being fixed to the movable component, and the first end of the driver being connected to the movable component via the accessory; And / or, the motor assembly further comprises at least one reed, a first end of the reed is connected to the support seat, and a second end of the reed is connected to the movable component.

10. A movable camera, characterized in that: Comprising a motor assembly as claimed in any one of claims 1 to 9, the driver moves to move the movable component and performs optical image stabilization processing.

11. The movable camera according to claim 10, characterized in that: The movable component includes a lens.

12. An electronic device, characterized in that: Comprising a movable camera as claimed in claim 10 or 11.

Images