Search

EP-4742281-A1 - MAGNETIC ATTRACTION ASSEMBLY AND ASSEMBLING METHOD THEREFOR, LINEAR MOTOR, CAMERA, AND ELECTRONIC DEVICE

EP4742281A1EP 4742281 A1EP4742281 A1EP 4742281A1EP-4742281-A1

Abstract

This application relates to the field of bendable circuit board technologies, and provides a magnetic attraction component and an assembly method thereof, a linear motor, a camera, and an electronic device, to resolve problems in a related technology that reliability of a connection between two magnets that repulse each other in the magnetic attraction component is low and assembly efficiency of the magnetic attraction component is low. The magnetic attraction component includes a magnet unit. The magnet unit includes a plurality of magnets. Two adjacent magnets, in the plurality of magnets, that repulse each other are welded. This application may be applied to an electronic device such as a mobile phone.

Inventors

  • LUO, Jixing
  • ZHANG, JIANGUANG
  • WANG, Yake
  • YAN, XIAOLIN
  • CHEN, HONG
  • LIU, BIN

Assignees

  • Huawei Technologies Co., Ltd.

Dates

Publication Date
20260513
Application Date
20240617

Claims (20)

  1. A magnetic attraction component, comprising a magnet unit (1), wherein the magnet unit (1) comprises a plurality of magnets (11), and in the plurality of magnets (11), two adjacent magnets (11) that repulse each other are welded.
  2. The magnetic attraction component according to claim 1, wherein a joint of the two adjacent magnets (11) that repulse each other has a welding bonding portion (2), and the welding bonding portion (2) connects the two adjacent magnets (11) that repulse each other together.
  3. The magnetic attraction component according to claim 2, wherein the magnet unit (1) is a Halbach array, each magnet (11) comprises a first end surface (111) and a second end surface (112) that are disposed opposite to each other, and first magnet side surfaces (113) connected between the first end surface (111) and the second end surface (112), the first end surface (111) is a surface of the magnet (11) on a strong magnetic side of the magnet unit (1), and the second end surface (112) is a surface of the magnet (11) on a weak magnetic side of the magnet unit (1); the first magnet side surfaces (113) are separately located at two opposite ends of the magnet (11) in a first direction (X), and the first direction (X) is perpendicular to an arrangement direction (Y) of the magnets (11) in the magnet unit (1); and in the two adjacent magnets (11), a joint of the first magnet side surfaces (113) of the magnets (11) has the welding bonding portion (2), and/or a joint of the second end surfaces (112) of the magnets (11) has the welding bonding portion (2).
  4. The magnetic attraction component according to claim 3, wherein the magnet unit (1) comprises two magnets (11), the two magnets (11) are a first magnet (11m) and a second magnet (11n), the first magnet (11m) comprises a first magnet subportion (115) and a second magnet subportion (116), the first magnet subportion (115) and the second magnet subportion (116) are of an integrated structure, the second magnet subportion (116) is located between the first magnet subportion (115) and the second magnet (11n), a pole direction of the first magnet subportion (115) is opposite to a pole direction of the second magnet (11n), and a pole direction of the second magnet subportion (116) is perpendicular to the pole direction of the first magnet subportion (115).
  5. The magnetic attraction component according to claim 2, wherein in the magnet unit (1), each magnet (11) comprises two magnet (11) end surfaces disposed opposite to each other, and first magnet side surfaces (113) connected between the two magnet (11) end surfaces, and the magnets (11) have a same pole direction that points from one of the two magnet (11) end surfaces to the other magnet (11) end surface; the first magnet side surfaces (113) are separately located at two opposite ends of the magnet (11) in a first direction (X), and the first direction (X) is perpendicular to an arrangement direction (Y) of the magnets (11) in the magnet unit (1); and in the two adjacent magnets (11), a joint of the first magnet side surfaces (113) of the magnets (11) has the welding bonding portion (2).
  6. The magnetic attraction component according to claim 5, wherein there are a plurality of magnet units (1), the plurality of magnet units (1) are arranged in the arrangement direction (Y), pole directions of magnets (11) in two adjacent magnet units (1) are opposite, and a joint of the first magnet side surfaces (113) of the two adjacent magnet units (1) has the welding bonding portion (2).
  7. The magnetic attraction component according to any one of claims 2 to 6, wherein the welding bonding portion (2) is of a strip structure and extends along a seam (12) between the magnets (11).
  8. The magnetic attraction component according to claim 7, wherein the welding bonding portion (2) is in a wave shape along the seam (12).
  9. The magnetic attraction component according to claim 7 or 8, wherein an end portion of the welding bonding portion (2) is disposed at an interval from an edge of the magnet (11) along the seam (12).
  10. The magnetic attraction component according to any one of claims 2 to 6, wherein there are a plurality of welding bonding portions (2), and the plurality of welding bonding portions (2) are spaced along seams (12) between the magnets (11).
  11. The magnetic attraction component according to claim 10, wherein the welding bonding portion (2) has a spiral pattern (23), and the pattern (23) extends from a central region of the welding bonding portion (2) to an edge region of the welding bonding portion (2).
  12. The magnetic attraction component according to any one of claims 1 to 11, wherein the magnetic attraction component further comprises a magnet mounting bracket (3), an accommodating groove (31) is disposed on the magnet mounting bracket (3), a groove bottom wall of the accommodating groove (31) is covered with a magnetic conductive sheet (32), and at least a part of the magnet unit (1) is disposed in the accommodating groove (31).
  13. A linear motor, comprising a stator (410), a mover (420), a drive coil (430), and the magnetic attraction component (440) according to any one of claims 1 to 12, wherein the drive coil (430) is disposed on one of the stator (410) and the mover (420), and the magnetic attraction component (440) is disposed on the other of the stator (410) and the mover (420).
  14. A camera, comprising an optical lens (200), a photosensitive element (300), and the linear motor (400) according to claim 13, wherein the optical lens (200) is fastened to the mover (420) of the linear motor (400), the photosensitive element (300) is disposed on an image side of the optical lens (200), and the photosensitive element (300) is relatively fastened to the stator (410) of the linear motor (400) in an axial direction of the optical lens (200).
  15. An electronic device, comprising a housing (700) and the camera (100) according to claim 14, wherein the camera (100) is disposed on the housing (700).
  16. An assembly method for a magnetic attraction component, comprising: welding two adjacent magnets (11) that repulse each other in a magnet unit (1) in the magnetic attraction component, wherein the magnet unit (1) comprises a plurality of magnets (11), and the plurality of magnets (11) in the magnet unit (1) are placed on a carrying surface (60) of a carrier (6).
  17. The assembly method for a magnetic attraction component according to claim 16, wherein the magnet unit (1) is a Halbach array, each magnet (11) comprises a first end surface (111) and a second end surface (112) that are disposed opposite to each other, and first magnet side surfaces (113) connected between the first end surface (111) and the second end surface (112), the first end surface (111) is located on a strong magnetic side of the magnet unit (1), the second end surface (112) is located on a weak magnetic side of the magnet unit (1), the first magnet side surfaces (113) are separately located at two opposite ends of the magnet (11) in a first direction (X), and the first direction (X) is perpendicular to an arrangement direction (Y) of the magnets (11) in the magnet unit (1); and welding the two adjacent magnets (11) that repulse each other in the magnet unit (1) in the magnetic attraction component comprises: performing welding at a joint of welding surfaces of the two adjacent magnets (11), wherein the welding surface is located on a side that is of the magnet (11) and that is away from the carrying surface (60), and the welding surface is the second end surface (112) or the first magnet side surface (113).
  18. The assembly method for a magnetic attraction component according to claim 17, wherein the carrier (6) comprises a carrying body (61) and a movable carrying platform (62), an accommodating hole (611) is disposed on the carrying body (61), the movable carrying platform (62) is disposed in the accommodating hole (611) and may be separated from the carrying body (61), and the movable carrying platform (62) is configured to be disposed with the magnet unit (1); and after welding is performed at the joint of the welding surfaces of the two adjacent magnets (11), the method further comprises: separating the movable carrying platform (62) from the carrying body (61); moving the movable carrying platform (62) to be above of the magnet mounting bracket (3), and rotating the movable carrying platform (62) by a given angle, to enable the first end surface (111) of the magnet (11) to be away from a groove bottom wall of an accommodating groove (31) on the magnet mounting bracket (3); and separating the movable carrying platform (62) from the magnet unit (1) to place the magnet unit (1) in the accommodating groove (31).
  19. The assembly method for a magnetic attraction component according to claim 18, wherein the movable carrying platform (62) comprises a carrying platform body (621) and magnet snapping members (622) that are able to be movably disposed on two opposite sides of the carrying platform body (621), there are three magnets (11) in the magnet unit (1), a magnet (11) located in a middle is located on the carrying platform body (621), parts of magnets (11) located on two sides are located on the carrying platform body (621), the other parts of the magnets (11) are located on the corresponding magnet snapping members (622), and each magnet snapping member (622) snaps to the corresponding magnet (11); and separating the movable carrying platform (62) from the magnet unit (1) comprises: adjusting a location of each magnetic snapping member (622) relative to the carrying platform body (621), to enable each magnetic snapping member (622) to be separated from the corresponding magnet (11).
  20. The assembly method for a magnetic attraction component according to any one of claims 16 to 19, wherein before welding the two adjacent magnets (11) that repulse each other in the magnet unit (1) in the magnetic attraction component, the method further comprises: covering a protection cover (7) on the plurality of magnets (11), wherein an avoidance hole (71) is disposed on the cover, and the avoidance hole (71) is opposite to a welding part on the magnet (11).

Description

This application claims priority to Chinese Patent Application No. 202311602953.0, filed with the China National Intellectual Property Administration on November 27, 2023 and entitled "MAGNETIC ATTRACTION COMPONENT AND ASSEMBLY METHOD THEREOF, LINEAR MOTOR, CAMERA, AND ELECTRONIC DEVICE", which is incorporated herein by reference in its entirety. TECHNICAL FIELD This application relates to the field of magnetic attraction technologies, and in particular, to a magnetic attraction component and an assembly method thereof, a linear motor, a camera, and an electronic device. BACKGROUND Magnetic attraction components such as Halbach arrays are widely used in apparatuses such as linear motors due to good magnetic attraction effect of the magnetic attraction components. The magnetic attraction component is usually formed by arranging and assembling a plurality of magnets according to a specific rule. How to reliably assemble the plurality of magnets together directly affects normal operation of the magnetic attraction component. In a magnetic attraction component in a related technology, for example, the Halbach array, two magnets that repulse each other are bonded together through a glue layer. However, strength of a connection between the two adjacent magnets that are bonded through the glue layer is low, and the two magnets are easily detached due to a repulsion force over time. This reduces reliability of the connection between the two magnets that repulse each other, and affects normal operation of the magnetic attraction component. In addition, the magnets are bonded through the glue layer. In an assembly process, the glue layer needs to be baked to enable the glue layer to be cured. This occupies much time, and is not conducive to improving assembly efficiency. Embodiments of this application provide a magnetic attraction component and an assembly method thereof, a linear motor, a camera, and an electronic device, to resolve problems in a related technology that reliability of a connection between two magnets that repulse each other in the magnetic attraction component is low and assembly efficiency of the magnetic attraction component is low. To achieve the foregoing objectives, the following technical solutions are used in embodiments of this application. According to a first aspect, an embodiment of this application provides a magnetic attraction component that includes a magnet unit. The magnet unit includes a plurality of magnets. Two adjacent magnets that repulse each other are welded in the plurality of magnets. Through such a disposition, a connection between the magnets that repulse each other is closer, and strength of the connection is higher, thereby improving reliability of the connection between the magnets that repulse each other, and further ensuring normal operation of the magnetic attraction component. In addition, the magnets that repulse each other are welded, so that a process that occupies long time, such as baking, can be omitted, thereby helping improve assembly efficiency of the magnetic attraction component. In some embodiments, a joint of the two adjacent magnets that repulse each other has a welding bonding portion, and the welding bonding portion connects the two adjacent magnets that repulse each other together. Through such a disposition, this is more conducive to connecting the magnets together, thereby helping improve the strength of the connection between the magnets. In some embodiments, the magnet unit is a Halbach array, each magnet includes a first end surface and a second end surface that are disposed opposite to each other, and first magnet side surfaces connected between the first end surface and the second end surface, the first end surface is a surface of a strong magnetic side, on which the magnet is located, of the magnet unit, the second end surface is a surface of a weak magnetic side, on which the magnet is located, of the magnet unit, the first magnet side surfaces are separately located at two opposite ends of the magnet in a first direction, and the first direction is perpendicular to an arrangement direction of the magnets in the magnet unit. In the two adjacent magnets, a joint of the first magnet side surfaces of the magnets has the welding bonding portion, and/or a joint of the second end surfaces of the magnets has the welding bonding portion. Impact of welding on magnetism of the magnet unit can be reduced through such a disposition. In some embodiments, the magnet unit includes two magnets, the two magnets are: a first magnet and a second magnet, the first magnet includes a first magnet subportion and a second magnet subportion, the first magnet subportion and the second magnet subportion are of an integrated structure, the second magnet subportion is located between the first magnet subportion and the second magnet, a pole of the first magnet subportion is opposite to a pole of the second magnet, and a pole of the second magnet subportion is perpend