Focus motor and camera module

Abstract

The application provides a focusing motor and a camera module. The focusing motor comprises a fixed part, a moving part, a focusing assembly, a magnetic attraction sensing part, a guide part and a position sensor. The fixed part comprises a first support arm and a second support arm connected with each other, and a light passage hole formed between the first support arm and the second support arm. The moving part is arranged in the light passage hole and can move in a preset direction. The magnetic attraction sensing part is arranged in the moving part. The angle between the magnetization direction of the magnetic attraction sensing part and the first direction and the second direction perpendicular to the preset direction is an acute angle. The guide part is arranged on the first support arm and corresponds to the magnetic attraction sensing part. The position sensor is arranged on the second support arm and corresponds to the magnetic attraction sensing part. The position sensor can generate an induction force with the magnetic attraction sensing part, so that the position sensor can sense the moving position of the moving part. The focusing motor can significantly reduce the size of the focusing motor, and can guarantee the guiding stability and the position detection precision required by the automatic focusing function while realizing the miniaturization of the camera module.

Description

Technical Field

[0001] This application relates to the field of camera technology, specifically to a focusing motor and camera module. Background Technology

[0002] The camera module is an indispensable component of a mobile phone. In recent years, miniaturization and thinness have become inevitable trends in mobile phone development. The design of the camera module also needs to meet the characteristics of small size to adapt to this trend. However, while meeting the requirement of small size, the camera module also needs to meet the requirements of functions such as autofocus. To meet the requirements of functions such as autofocus, corresponding components are needed. Theoretically, the number of components will increase, making the structure of the camera module more complex, and making it difficult to control the overall size and weight of the camera module within a certain range, which contradicts the requirement of small size. Utility Model Content

[0003] In view of the above, it is necessary to propose a focusing motor and a camera module to reduce the size of the focusing motor, thereby achieving miniaturization of the camera module.

[0004] This application provides a focusing motor, comprising: a fixing member including a first support arm and a second support arm connected together, and a light-transmitting hole formed between the first support arm and the second support arm; a moving member disposed within the light-transmitting hole of the fixing member and movable along a preset direction; a focusing assembly for driving the moving member to move within the fixing member along the preset direction when energized; and a magnetic attraction sensor disposed within the moving member, wherein the angle between the magnetization direction of the magnetic attraction sensor and a first direction and a second direction perpendicular to the preset direction are both acute angles, and the magnetization direction of the magnetic attraction sensor... Located between the first direction and the second direction, the first support arm extends along the first direction, and the second support arm extends along the second direction; a guide member is disposed on the first support arm and is disposed corresponding to the magnetic attraction sensor, the guide member being able to generate a magnetic attraction force with the magnetic attraction sensor, so that the guide member is pressed between the fixed member and the movable member; and a position sensor is disposed on the second support arm and is disposed corresponding to the magnetic attraction sensor, the position sensor being able to generate a sensing force with the magnetic attraction sensor, so that the position sensor senses the moving position of the movable member.

[0005] In the focusing motor provided in this application embodiment, by setting the magnetization direction of the magnetic induction element to have acute angles between the first direction and the second direction, and the magnetization direction of the magnetic induction element being located between the first and second directions, the magnetic induction element can generate magnetic attraction in the first direction and induction force in the second direction. Since the guide is located on the first support arm, the magnetic attraction force generated in the first direction interacts with the guide, which can tightly attract the guide between the fixed part and the moving part, so that the guide provides stable lateral support and guidance, ensuring the smoothness and accuracy of the focusing action. The position sensor is located on the second support arm, and the induction force generated in the second direction interacts with the position sensor, which can enable the position sensor to accurately detect the position of the moving part in the preset direction. This eliminates the need for two sets of independent magnets and their support structures used for guidance and position detection in traditional designs, significantly reducing the size of the focusing motor. While achieving miniaturization of the camera module, the guiding stability and position detection accuracy required for the autofocus function are guaranteed.

[0006] In one possible implementation, the angle between the magnetization direction of the magnetic sensor and the first direction is equal to the angle between the magnetization direction of the magnetic sensor and the second direction.

[0007] In the embodiments of this application, by making the angle between the magnetization direction of the magnetic induction element and the first direction equal to the angle between the magnetization direction of the magnetic induction element and the second direction, the magnetic field generated by the magnetic induction element can be made to have equal magnitudes in the first and second directions, thus avoiding the situation where the component in one direction is too strong while the component in the other direction is insufficient.

[0008] In one possible implementation, the magnetic attraction sensor is located on the side of the movable member facing the fixed member, and the magnetic attraction sensor is located inside the movable member.

[0009] In the embodiments of this application, by placing the magnetic attraction sensor on the side of the moving part facing the fixed part, the installation and removal of the magnetic attraction sensor can be facilitated.

[0010] In one possible implementation, the guide is a guide rod or a plurality of balls, the plurality of balls being stacked along the preset direction.

[0011] In the embodiments of this application, when the guide is set as a guide rod, during the autofocusing process driven by the focusing motor, the moving part can move linearly along the guide rod, making the lens movement smoother, having higher motion accuracy, and improving image clarity. When the guide is set as multiple balls, while ensuring that it plays the same role as the guide rod, the rolling friction of the balls can replace the sliding friction of the guide rod, reducing the coefficient of friction and thus reducing the resistance to the moving part.

[0012] In one possible implementation, the light-transmitting hole has a first groove extending along the preset direction on the hole wall corresponding to the guide member, and the moving member has a second groove corresponding to the position of the first groove, and the guide member is disposed in the first groove and the second groove.

[0013] In the embodiments of this application, by correspondingly opening grooves extending in a preset direction on the wall of the light-transmitting hole of the fixing member and on the moving member, and nesting the guide member in the double grooves, the double grooves form a double constraint on the guide member, restricting the offset of the moving member in the first and second directions, thus ensuring the accuracy of the moving direction of the moving member.

[0014] In one possible implementation, the wall of the light-transmitting hole is recessed with a first limiting groove, and the moving member is provided with a first protrusion corresponding to the position of the first limiting groove, the first protrusion protruding into the first limiting groove.

[0015] In the embodiments of this application, by providing a first limiting groove in the wall of the light-transmitting hole of the fixing member and providing a first protrusion embedded in the groove at the corresponding position of the moving member, this mechanical interlocking structure provides rigid guiding constraints for the moving member, which significantly suppresses the radial offset and tilt of the lens during movement.

[0016] In one possible implementation, the wall of the light-transmitting hole is provided with a first limiting part, the moving member is provided with an abutting surface corresponding to the position of the first limiting part, and a second protruding part is provided on the abutting surface. The second protruding part protrudes to one side of the first limiting part and the projections of the two in the preset direction overlap.

[0017] In the embodiments of this application, an interlaced limiting structure is formed by the first limiting part of the light-transmitting hole wall and the second protruding part on the contact surface of the moving part. This projection-overlapping protrusion-limiting design constructs a three-dimensional guiding constraint in a limited space, effectively suppressing the radial offset and rotation of the moving part; and improving the impact resistance stability.

[0018] In one possible implementation, the focusing motor further includes a positioning member, which is disposed on the first limiting portion and can abut against the second protrusion. The positioning member and the guide member are disposed on opposite sides of the axis of the light-transmitting hole.

[0019] In the embodiments of this application, by symmetrically arranging positioning and guiding components on both sides of the axis of the light-transmitting hole, the sway and torsional deformation during the focusing process can be effectively eliminated; and the moving component can be prevented from being misaligned during installation.

[0020] In one possible implementation, the focusing assembly includes a focusing magnet and a focusing coil, one of which is disposed on the fixed member and the other on the moving member. When energized, the focusing magnet and the focusing coil interact to cause the moving member to move in a predetermined direction within the light-transmitting hole of the fixed member.

[0021] In the embodiments of this application, by setting the focusing magnet and the focusing coil on the fixed part and the moving part respectively, the separate arrangement of the magnet and the coil optimizes the space utilization and makes the motor structure more compact.

[0022] A second aspect of this application provides a camera module, including: a focusing motor as described in any of the above embodiments; and a lens, the lens being mounted on the movable member.

[0023] In the camera module provided in this application embodiment, by setting the magnetization direction of the magnetic sensor to have acute angles between the first direction and the second direction, and the magnetization direction of the magnetic sensor being located between the first and second directions, the magnetic sensor can generate magnetic attraction in the first direction and induction force in the second direction. Since the guide is located on the first support arm, the magnetic attraction force generated in the first direction interacts with the guide, which can tightly attract the guide between the fixed part and the moving part, so that the guide provides stable lateral support and guidance, ensuring smooth and accurate focusing action. The position sensor is located on the second support arm, and the induction force generated in the second direction interacts with the position sensor, which can enable the position sensor to accurately detect the position of the moving part in the preset direction. This eliminates the need for two sets of independent magnets and their support structures used for guidance and position detection in traditional designs, significantly reducing the size of the focusing motor. While achieving miniaturization of the camera module, the guiding stability and position detection accuracy required for the autofocus function are guaranteed. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural diagram of the focusing motor provided in the embodiments of this application.

[0025] Figure 2 yes Figure 1 An exploded view of the focusing motor.

[0026] Figure 3 yes Figure 1 A cross-sectional view of the focusing motor along the AA direction.

[0027] Figure 4 This is a three-dimensional structural diagram of the camera module provided in the embodiments of this application.

[0028] Explanation of main component symbols: Focusing motor 100, fixing part 10, first support arm 101, second support arm 102, third support arm 103, fourth support arm 104, light-transmitting hole 11, first sliding groove 12, first limiting groove 13, first limiting part 14, moving part 20, second sliding groove 21, first protrusion 22, abutting surface 23, second protrusion 24, focusing assembly 30, focusing magnet 31, focusing coil 32, magnetic attraction sensor 40, guide 50, position sensor 60, positioning part 70, lens 200, camera module 1000. Detailed Implementation

[0029] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0030] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a connection that allows for communication; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0031] The following disclosure provides many different embodiments or examples for implementing various structures of this invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0032] The embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0033] Most focusing motors on the market today are voice coil type thrust-driven architectures. The position detection of the moving parts within these motors primarily relies on position sensors and corresponding sensing magnets. In some architectures, magnetic attraction is used to stabilize the moving parts, typically achieved by placing a magnet on the moving part and a magnetic material on the fixed part. This architecture, with its combination of magnets and sensing magnets, increases the overall weight and size of the focusing motor, adds to the assembly process, and introduces potential interference issues.

[0034] To resolve the above issues, please also refer to Figure 1 and Figure 2 The first aspect of this application provides a focusing motor 100, including a fixing member 10, a moving member 20, a focusing assembly 30, a magnetic induction member 40, a guide member 50, and a position sensor 60.

[0035] The fixing member 10 includes a first support arm 101 and a second support arm 102 connected to each other, and a light-transmitting hole 11 formed between the first support arm 101 and the second support arm 102. The moving member 20 is generally square in structure, and is disposed in the light-transmitting hole 11 of the fixing member 10 and can move along a preset direction L; the focusing assembly 30 is used to drive the moving member 20 to move along the preset direction L within the fixing member 10 when energized. A magnetic induction element 40 is disposed within the movable element 20. The angles between the magnetization direction O of the magnetic induction element 40 and the first and second directions perpendicular to the preset direction L are both acute angles. The magnetization direction O of the magnetic induction element 40 is located between the first and second directions. The first support arm 101 extends along the first direction, and the second support arm 102 extends along the second direction. The preset direction L is the Z-axis direction, the first direction is the X-axis direction, and the second direction is the Y-axis direction. That is, the angle α between the magnetization direction O of the magnetic induction element 40 and the X-axis direction is an acute angle, and the angle β between the magnetization direction O of the magnetic induction element 40 and the X-axis direction is an acute angle. It can be understood that the angle between the first and second directions is an acute angle. A guide element 50 is disposed on the first support arm 101 and corresponds to the magnetic induction element 40. The guide element 50 can generate a magnetic attraction force with the magnetic induction element 40, so that the guide element 50 is pressed between the fixed element 10 and the movable element 20. A position sensor 60 is disposed on the second support arm 102 and corresponding to the magnetic attraction sensor 40. The position sensor 60 can generate a sensing force with the magnetic attraction sensor 40 to sense the movement position of the moving member 20. In this embodiment, the fixing member 10 also includes a third support arm 103 and a fourth support arm 104 connected to each other. The end of the third support arm 103 away from the fourth support arm 104 is connected to the second support arm 102, and the end of the fourth support arm 104 away from the third support arm 103 is connected to the first support arm 101. The first support arm 101, the second support arm 102, the third support arm 103, and the fourth support arm 104 form a square frame structure. The light-transmitting hole 11 is located between the first support arm 101, the second support arm 102, the third support arm 103, and the fourth support arm 104. The position sensor 60 is a Hall sensor.

[0036] In the focusing motor 100 provided in this embodiment, by setting the magnetization direction O of the magnetic induction element 40 to have acute angles α with the first direction and β with the second direction, and with the magnetic induction element 40 located between the first and second directions, the magnetic induction element 40 can generate magnetic attraction in the first direction and induction force in the second direction. Since the guide 50 is located on the first support arm 101, the magnetic attraction force generated in the first direction interacts with the guide 50, which can tightly attract the guide 50 between the fixed member 10 and the moving member 20, so that the guide 50 provides stable lateral support and guidance, ensuring the smoothness and accuracy of the focusing action. The position sensor 60 is located on the second support arm 102, in the second direction... The induced force generated on the surface interacts with the position sensor 60, enabling the position sensor 60 to accurately detect the position of the moving part 20 in the preset direction L. This eliminates the need for two separate sets of magnets and their supporting structures used for guidance and position detection in traditional designs, significantly reducing the size of the focusing motor 100. While miniaturizing the camera module, the guiding stability and position detection accuracy required for the autofocus function are ensured. Since the magnetic attraction sensing element 40 can generate sufficient magnetic attraction in the first direction and effective induction in the second direction, it combines the functions of magnetic attraction magnets and induction magnets in the prior art. This not only saves materials and reduces the overall weight of the focusing motor 100, but also simplifies the assembly process and avoids problems such as poor assembly and mutual interference.

[0037] In one possible implementation, the angle between the magnetization direction O of the magnetic attraction sensor 40 and the first direction is equal to the angle between the magnetization direction O of the magnetic attraction sensor 40 and the second direction. Specifically, as shown... Figure 2 As shown, the arrow below the magnetic attraction sensor 40 indicates the magnetization direction O of the magnetic attraction sensor 40. The angle α between the magnetization direction O of the magnetic attraction sensor 40 and the first direction and the angle β between the magnetization direction O of the magnetic attraction sensor 40 and the second direction are both 45°.

[0038] In the embodiments of this application, by making the angle α between the magnetization direction O of the magnetic attraction sensor 40 and the first direction equal to the angle β between the magnetization direction O of the magnetic attraction sensor 40 and the second direction, the magnetic field generated by the magnetic attraction sensor 40 can be made to have equal magnitudes in the first and second directions, thus avoiding the situation where one direction component is too strong while the other direction component is insufficient.

[0039] In one possible implementation, the magnetic attraction sensor 40 is disposed on the side of the movable member 20 facing the fixed member 10, and the magnetic attraction sensor 40 is disposed within the movable member 20. Specifically, the magnetic attraction sensor 40 is cuboid in shape and is divided into two parts, one part being a triangular prism with an S pole and the other part being a triangular prism with an N pole. The side with the N pole faces the fixed member 10, the position sensor 60 is embedded within the fixed member 10 and is disposed opposite to the side of the magnetic attraction sensor 40 with its N pole facing the fixed member 10, and the guide member 50 is disposed opposite to the other side of the magnetic attraction sensor 40 with its N pole.

[0040] In the embodiments of this application, by placing the magnetic attraction sensor 40 on the side of the movable member 20 facing the fixed member 10, the installation and removal of the magnetic attraction sensor 40 can be facilitated.

[0041] In some embodiments, the magnetic attraction sensor 40 may be embedded within the movable member 20. In some embodiments, the movable member 20 has a receiving groove corresponding to the position of the magnetic attraction sensor 40, and the magnetic attraction sensor 40 is disposed within the receiving groove.

[0042] In one possible implementation, the guide member 50 is a guide rod or a plurality of balls, with the balls stacked in a predetermined direction L. In this embodiment, the guide member 50 is a guide rod.

[0043] In the embodiments of this application, when the guide member 50 is configured as a guide rod, during the autofocusing process driven by the focusing motor 100, the moving member 20 can move linearly along the guide rod, making the lens movement smoother, achieving higher motion accuracy, and improving image clarity. When the guide member 50 is configured as multiple balls, while ensuring the same function as the guide rod, the rolling friction of the balls can replace the sliding friction of the guide rod, reducing the coefficient of friction and thus reducing the resistance to the moving member 20.

[0044] Please see also Figure 3 In one possible implementation, the guide member 50 corresponding to the light-transmitting hole 11 has a first groove 12 extending along a preset direction L on its hole wall. The first groove 12 is an arc-shaped groove. The moving member 20 has a second groove 21 corresponding to the first groove 12. The second groove 21 is also an arc-shaped groove. The first groove 12 and the second groove 21 can be closed to form a cylindrical groove. The guide member 50 is disposed within the first groove 12 and the second groove 21. Specifically, the first groove 12 is formed on the side of the first support arm 101.

[0045] In the embodiments of this application, by correspondingly opening grooves extending along a preset direction L on the wall of the light-transmitting hole 11 of the fixing member 10 and on the moving member 20, and nesting the guide member 50 in the double grooves, the double grooves form a double constraint on the guide member 50, restricting the offset of the moving member 20 in the first direction and the second direction, thus ensuring the accuracy of the moving direction of the moving member 20.

[0046] In one possible implementation, the wall of the light-transmitting hole 11 is recessed with a first limiting groove 13, which is a cuboid groove. The movable member 20 has a first protrusion 22 corresponding to the position of the first limiting groove 13. The first protrusion 22 is a strip-shaped structure and protrudes into the first limiting groove 13, approximately matching the first limiting groove 13. Specifically, there are two first limiting grooves 13 located on the third support arm 103 and the fourth support arm 104 of the fixing member 10. Correspondingly, there are two first protrusions 22 located on adjacent sides of the movable member 20.

[0047] In the embodiments of this application, by providing a first limiting groove 13 on the wall of the light-transmitting hole 11 of the fixing member 10 and providing a first protrusion 22 embedded in the groove at the corresponding position of the moving member 20, this mechanical interlocking structure provides rigid guiding constraint for the moving member 20, which significantly suppresses the radial offset and tilt of the lens during movement.

[0048] In one possible implementation, the wall of the light-transmitting hole 11 is provided with a first limiting portion 14, which is a sheet-like structure. The moving member 20 is provided with an abutment surface 23 corresponding to the position of the first limiting portion 14. A second protruding portion 24 is provided on the abutment surface 23, which protrudes to one side of the first limiting portion 14, and the projections of the two portions overlap in a preset direction L. Specifically, the first limiting portion 14 is located between two first limiting grooves 13.

[0049] In the embodiments of this application, the first limiting part 14 on the wall of the light-transmitting hole 11 and the second protruding part 24 on the contact surface 23 of the moving part 20 form an interlaced limiting structure. This projection-overlapping protrusion-limiting design constructs a three-dimensional guiding constraint in a limited space, effectively suppressing the radial offset and rotation of the moving part 20; and improving the impact resistance stability.

[0050] In one possible implementation, the focusing motor 100 further includes a positioning member 70, which is generally cylindrical. The positioning member 70 is disposed on the first limiting portion 14 and can abut against the second protrusion 24. The positioning member 70 and the guide member 50 are disposed on opposite sides of the axis of the light-transmitting hole 11. Specifically, the positioning member 70 passes through the first limiting portion 14.

[0051] In the embodiments of this application, by symmetrically arranging positioning members 70 and guide members 50 on both sides of the axis of the light-transmitting hole 11, the sway and torsional deformation during the focusing process can be effectively eliminated; and the moving member 20 can be prevented from being misaligned during installation.

[0052] In one possible implementation, the focusing assembly 30 includes a focusing magnet 31 and a focusing coil 32. One of the focusing magnet 31 and the focusing coil 32 is disposed on the fixing member 10, and the other is disposed on the moving member 20. When energized, the focusing magnet 31 and the focusing coil 32 interact to cause the moving member 20 to move along a predetermined direction L within the light-transmitting hole 11 of the fixing member 10. In this embodiment, the focusing magnet 31 is disposed within the moving member 20, and the focusing coil 32 is disposed within the fixing member 10 and is disposed opposite to the focusing magnet 31.

[0053] In the embodiments of this application, by setting the focusing magnet 31 and the focusing coil 32 on the fixed member 10 and the moving member 20 respectively, the separate arrangement of the magnet and the coil optimizes the space utilization and makes the motor structure more compact.

[0054] Please see Figure 4 The second aspect of this application provides a camera module 1000, including a focusing motor 100 and a lens 200. The lens 200 is mounted on a moving part 20 of the focusing motor 100, and the moving part 20 of the focusing motor 100 can drive the lens 200 to move along a preset direction L.

[0055] See also Figure 1In the camera module 1000 provided in this application embodiment, by setting the magnetization direction O of the magnetic attraction sensor 40 to have acute angles α between it and the first direction and β between it and the second direction, and with the magnetization direction O of the magnetic attraction sensor 40 located between the first and second directions, the magnetic attraction sensor 40 can generate magnetic attraction force in the first direction and induction force in the second direction. Since the guide member 50 is located on the first support arm 101, the magnetic attraction force generated in the first direction interacts with the guide member 50, which can tightly attract the guide member 50 between the fixed member 10 and the moving member 20, so that the guide member 50 provides stable lateral support and guidance, ensuring the smoothness and accuracy of the focusing action. The position sensor 60 is located on the second support arm 102, in the second direction... The generated inductive force interacts with the position sensor 60, enabling the position sensor 60 to accurately detect the position of the moving part 20 in the preset direction L. This eliminates the need for two separate sets of magnets and their supporting structures used for guidance and position detection in traditional designs, significantly reducing the size of the focusing motor 100. While miniaturizing the camera module 1000, the guiding stability and position detection accuracy required for the autofocus function are ensured. Since the magnetic induction element 40 can generate sufficient magnetic attraction in the first direction and effective induction force in the second direction, it combines the functions of magnetic attraction magnets and induction magnets in the prior art. This not only saves materials and reduces the overall weight of the focusing motor 100, but also simplifies the assembly process and avoids problems such as poor assembly and mutual interference.

[0056] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be incorporated into this invention. No reference numerals in the claims should be construed as limiting the scope of the claims. Furthermore, it is clear that the word "comprising" does not exclude other elements or steps, and the singular does not exclude the plural.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model.

Claims

1. A focusing motor, characterized in that, include: The fastener includes a first support arm and a second support arm connected to each other, and a light-transmitting hole formed between the first support arm and the second support arm; A movable component is disposed within the light-transmitting hole of the fixed component and can move along a preset direction; The focusing assembly is used to drive the moving part to move along the preset direction when energized; A magnetic attraction sensor is disposed inside the movable member. The angle between the magnetization direction of the magnetic attraction sensor and the first and second directions perpendicular to the preset direction is an acute angle. The magnetization direction of the magnetic attraction sensor is located between the first and second directions. The first support arm extends along the first direction, and the second support arm extends along the second direction. A guide member is provided on the first support arm and is disposed corresponding to the magnetic attraction sensor. The guide member is able to generate a magnetic attraction force with the magnetic attraction sensor so that the guide member is pressed between the fixed member and the movable member. and A position sensor is disposed on the second support arm and is configured corresponding to the magnetic attraction sensor. The position sensor is capable of generating a sensing force with the magnetic attraction sensor so that the position sensor can sense the movement position of the moving part.

2. The focusing motor as described in claim 1, characterized in that, The angle between the magnetization direction of the magnetic induction element and the first direction is equal to the angle between the magnetization direction of the magnetic induction element and the second direction.

3. The focusing motor as described in claim 1, characterized in that, The magnetic attraction sensor is located on the side of the movable member facing the fixed member, and the magnetic attraction sensor is located inside the movable member.

4. The focusing motor as described in claim 1, characterized in that, The guide component is a guide rod or multiple balls, and the multiple balls are stacked and arranged along the preset direction.

5. The focusing motor as described in claim 1, characterized in that, The light-transmitting hole has a first groove extending along the preset direction on the hole wall corresponding to the guide member, and the moving member has a second groove corresponding to the position of the first groove. The guide member is disposed in the first groove and the second groove.

6. The focusing motor as described in claim 1, characterized in that, The wall of the light-transmitting hole is recessed with a first limiting groove, and the moving part is provided with a first protrusion corresponding to the position of the first limiting groove. The first protrusion protrudes into the first limiting groove.

7. The focusing motor as described in claim 1, characterized in that, The wall of the light-transmitting hole is provided with a first limiting part, and the moving part is provided with an abutting surface corresponding to the position of the first limiting part. A second protruding part is provided on the abutting surface, and the second protruding part protrudes to one side of the first limiting part and the projections of the two in the preset direction overlap.

8. The focusing motor as described in claim 7, characterized in that, The focusing motor also includes a positioning member, which is disposed on the first limiting portion and can abut against the second protrusion. The positioning member and the guide member are disposed on opposite sides of the axis of the light-transmitting hole.

9. The focusing motor as described in claim 1, characterized in that, The focusing assembly includes a focusing magnet and a focusing coil. One of the focusing magnet and the focusing coil is disposed on the fixed member, and the other is disposed on the moving member. When energized, the focusing magnet and the focusing coil interact to cause the moving member to move in a predetermined direction within the light-transmitting hole of the fixed member.

10. A camera module, characterized in that, include: The focusing motor as described in any one of claims 1 to 9; and A lens, which is mounted on the movable component.

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