Motor assembly, camera module and terminal equipment

Abstract

The utility model relates to the technical field of camera shooting, and particularly discloses a motor assembly, a camera shooting module and terminal equipment, and the motor assembly comprises a base which is provided with a containing cavity; the carrier is provided with a light through hole, the carrier is arranged in the containing cavity and movably connected with the base, one of the carrier and the base is provided with a containing groove, and the containing groove is provided with at least one receding opening and at least one groove wall; the magnetic unit is arranged in the containing groove, one part of structure of the magnetic unit extends to the avoiding opening so as to increase the size of the magnetic unit, and the other part of structure of the magnetic unit abuts against the groove wall; and the coil is arranged on the other one of the carrier and the base corresponding to the magnetic unit and is used for generating magnetic force with the magnetic unit so as to drive the carrier to move. According to the motor assembly, the accommodating groove is limited to be provided with the avoiding opening and the groove wall, the magnetic unit is resisted through the groove wall, and the size of the magnetic unit can be increased through the avoiding opening, so that the magnetic force between the coil and the magnetic unit is increased, and the driving force of the motor assembly is increased.

Description

Technical Field

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

[0002] In recent years, with the increasing demands for image quality from smart terminal devices, camera modules equipped with optical image stabilization (OIS) and / or autofocus (AF) have been increasingly widely used. Both of these functions rely on the electromagnetic interaction between coils and magnets in the voice coil motor (VCM). However, to meet the miniaturization requirements of camera modules, the size of the motor assembly, such as its height and length, is strictly limited. This often results in insufficient driving force in traditional motor assemblies, thus affecting the focusing response speed and / or the accuracy of optical image stabilization compensation in the camera module. Utility Model Content

[0003] In view of the above, it is necessary to provide a motor assembly, a camera module, and a terminal device to improve the driving force of the motor assembly.

[0004] In a first aspect, embodiments of this application provide a motor assembly, comprising: a base having a receiving cavity; a carrier having a light-transmitting hole, the carrier being disposed in the receiving cavity and movably connected to the base, one of the carrier and the base having a receiving groove, the receiving groove having at least one clearance opening and at least one groove wall; a magnetic unit disposed in the receiving groove, a portion of its structure extending to the clearance opening to increase the size of the magnetic unit, and another portion of its structure abutting against the groove wall; and a coil, corresponding to the magnetic unit, disposed in the other of the carrier and the base, for generating magnetic force with the magnetic unit to drive the carrier to move.

[0005] The aforementioned motor assembly, by defining a receiving groove with a clearance opening and groove walls, uses the groove walls to block the magnetic unit, and the clearance opening eliminates the limitations imposed by the receiving groove on the size of the magnetic unit, such as its height and length. This allows the size of the magnetic unit to be increased. As the size of the magnetic unit increases, the magnetic field strength of the magnetic unit increases accordingly, thereby increasing the magnetic force between the coil and the magnetic unit, and consequently increasing the driving force of the motor assembly. Furthermore, due to the structure of the receiving groove in this embodiment, the size of the carrier and base can be reduced to meet the same driving force requirements, thus reducing the size of the motor assembly and facilitating miniaturization. In other words, for the same size requirements, the motor assembly of this embodiment has a greater driving force, and for the same driving force requirements, the motor assembly of this embodiment is smaller.

[0006] In one embodiment, the receiving groove includes a groove bottom and two groove walls, the two groove walls being spaced apart at both ends of the groove bottom, and the receiving groove having two opposing clearance openings along the extending direction of its groove walls.

[0007] The aforementioned motor assembly, by defining the receiving groove including the groove bottom and two groove walls, gives the receiving groove two opposing clearance openings, which is beneficial for the rational design of the shape of the magnetic unit.

[0008] In one embodiment, at least one of the two ends of each groove wall along its extension direction is provided with a blocking portion protruding towards the interior of the receiving groove, and the magnetic unit is provided with a chamfer portion adapted to the blocking portion. The receiving groove blocks the magnetic unit at the clearance opening through the cooperation of the blocking portion and the chamfer portion.

[0009] The aforementioned motor assembly, by providing the aforementioned blocking part and chamfered part, blocks the magnetic unit at the clearance opening, ensuring that the magnetic unit is stably placed in the receiving groove.

[0010] In one embodiment, the chamfered portion is one of the following: a straight chamfer, an asymmetrical chamfer, a circular arc chamfer, a multi-level chamfer, an irregular chamfer, or a three-dimensional chamfer.

[0011] The aforementioned motor assembly, by defining the shape of the chamfered portion, facilitates the rational design of the magnetic unit's shape.

[0012] In one embodiment, the projected thickness of the blocking portion along the direction of movement of the carrier is less than the projected thickness of the magnetic unit along the direction of movement of the carrier.

[0013] The aforementioned motor assembly, by limiting the projected thickness of the stop portion to be less than the projected thickness of the magnetic unit, helps to ensure the large-size design of the magnetic unit to the greatest extent, thereby increasing the driving force of the motor assembly.

[0014] In one embodiment, the magnetic unit includes a magnetizing element, a first magnet, and a second magnet, and the receiving groove includes a groove bottom; the magnetizing element is connected to the groove bottom, and the first magnet and the second magnet are connected along the direction of movement of the carrier and are both connected to the side of the magnetizing element away from the groove bottom; or, the first magnet, the magnetizing element, and the second magnet are connected sequentially along the direction of movement of the carrier and are all connected to the groove bottom.

[0015] The aforementioned motor assembly, by setting the first and second magnets, generates electromagnetic interaction between the first and second magnets and the coil to drive the carrier's movement; by setting the aforementioned magnetizing element, firstly, the structural strength of the magnetic unit is enhanced; secondly, it is beneficial to further converge the magnetic force of the first and second magnets, which is beneficial to increase the driving force of the motor assembly; thirdly, the magnetizing element fixes the first and second magnets on the receiving groove, preventing the first and second magnets from shifting or falling off.

[0016] In one embodiment, the receiving groove includes a groove bottom, and the magnetic unit includes a magnetizing element, a first magnet, a second magnet, and a magnetizing part. The magnetizing element is connected to the groove bottom, and the first magnet, the second magnet, and the magnetizing part are sequentially connected along the movement direction of the carrier, and are all connected to the side of the magnetizing element away from the groove bottom. The projection of the magnetizing part along the movement direction of the carrier at least partially overlaps with the projection of the second magnet along the movement direction of the carrier.

[0017] The aforementioned motor assembly, by setting the first and second magnets, generates electromagnetic interaction between the first and second magnets and the coil to drive the carrier's movement; by setting the aforementioned magnetizing element, firstly, the structural strength of the magnetic unit is enhanced; secondly, it is beneficial to further converge the magnetic force of the first and second magnets, which is beneficial to increase the driving force of the motor assembly; thirdly, the magnetizing element fixes the first and second magnets on the receiving groove, preventing the first and second magnets from shifting or falling off; by setting the aforementioned magnetizing part, the magnetic force of the first and second magnets is further enhanced.

[0018] In one embodiment, the spacing between the inner coils of the coil along the direction of movement of the carrier is greater than or equal to the distance of movement of the carrier.

[0019] The aforementioned motor assembly ensures that the magnetic unit remains within the magnetic field range of the coil when the carrier is in motion by limiting the spacing between the inner coils of the coil to be greater than or equal to the moving distance of the carrier. This ensures that the magnetic unit can always generate effective electromagnetic interaction with the coil, preventing significant changes in the driving force of the motor assembly and ensuring its stability.

[0020] Secondly, embodiments of this application also provide a camera module, including a housing, a lens unit, a photosensitive chip, and a motor assembly as described in any of the above technical solutions. The motor assembly is disposed within the housing, the lens unit is disposed within the light-transmitting hole, and the photosensitive chip is disposed within the housing and located on the image side of the lens unit.

[0021] In the aforementioned camera module, the motor assembly features a defined receiving groove with a clearance opening and groove walls. The groove walls block the magnetic unit, while the clearance opening eliminates the limitations imposed by the receiving groove on the size of the magnetic unit, such as its height and length. This allows for a larger magnetic unit, which in turn increases its magnetic field strength, resulting in a stronger magnetic force between the coil and the magnetic unit, thereby increasing the driving force of the motor assembly. Furthermore, due to the structure of the receiving groove in this embodiment, the dimensions of the carrier and base can be reduced to meet the same driving force requirements, thus reducing the size of the motor assembly and facilitating the miniaturization of the camera module.

[0022] Thirdly, embodiments of this application also provide a terminal device, including the camera module described in the above technical solution.

[0023] In the aforementioned terminal device, the motor assembly of its camera module incorporates a defined receiving groove with a clearance opening and groove walls. The groove walls block the magnetic unit, while the clearance opening eliminates the limitations imposed by the receiving groove on the size of the magnetic unit, such as its height and length. This allows for an increase in the size of the magnetic unit, leading to a corresponding increase in its magnetic field strength. Consequently, the magnetic force between the coil and the magnetic unit increases, thereby increasing the driving force of the motor assembly. Furthermore, due to the structure of the receiving groove in this embodiment, the dimensions of the carrier and base can be reduced to meet the same driving force requirements, thus reducing the size of the motor assembly. This facilitates the miniaturization of the camera module and further satisfies the need for a thinner and lighter terminal device. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the motor assembly provided in the first embodiment of this application.

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

[0026] Figure 3 This is an exploded view of the motor assembly provided in the second embodiment of this application.

[0027] Figure 4 This is an exploded view of the motor assembly provided in the third embodiment of this application.

[0028] Explanation of main component symbols: Motor assembly 100, 200, 300, Carrier 10, Light transmission hole 12, Receiving groove 14, Clearance opening 141, Groove bottom 142, Groove wall 144, Blocking part 16, Magnetic unit 20, Chamfered part 21, Magnetizing element 22, First magnet 24, Second magnet 26, Magnetizing part 28, Coil 30, Optical axis O. Detailed Implementation

[0029] The embodiments of this application are described in detail below. Examples of these 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 application, and should not be construed as limiting this application.

[0030] In the description of this application, it should be understood that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, it should be noted that "a plurality of" means two or more, unless otherwise explicitly specified.

[0031] In the description of this application, it should be noted that, unless otherwise expressly 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 communication between the two components; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0032] The following will describe some embodiments of this application in detail with reference to the accompanying drawings.

[0033] Please see Figure 1 The first embodiment of this application provides a motor assembly 100. The motor assembly 100 is applied to a camera module, which can achieve optical image stabilization and / or autofocus functions by means of the motor assembly 100. The motor assembly 100 includes a base (not shown), a carrier 10, a magnetic unit 20, and a coil 30.

[0034] Please refer to the above. Figure 2The base has a receiving cavity (not shown). The carrier 10 has a light-transmitting hole 12 for mounting an external lens unit. The carrier 10 is a movable connecting base disposed within the receiving cavity. In this embodiment, the carrier 10 moves relative to the base along the optical axis O. It can be understood that the carrier 10 in this embodiment can be used as a focusing support. One of the carrier 10 and the base has a receiving groove 14, which has at least one clearance opening 141 and at least one groove wall 144. It should be noted that the receiving groove 14 described in this embodiment is a groove-type structure with a groove opening and closed bottom and peripheral sides.

[0035] A magnetic unit 20 is disposed within the receiving groove 14. A portion of the magnetic unit 20 extends to the clearance opening 141 to increase its size, while another portion abuts against the groove wall 144, thus blocking the magnetic unit 20. A coil 30 is disposed corresponding to the magnetic unit 20 in either the carrier 10 or the base. The coil 30 is energized to generate a magnetic force with the magnetic unit 20, driving the carrier 10 to move through electromagnetic interaction. Understandably, if the receiving groove 14 is located on the carrier 10, the magnetic unit 20 is disposed on the carrier 10, and the coil 30 is disposed on the base. The magnetic force generated between the coil 30 and the magnetic unit 20 drives the magnetic unit 20 and the carrier 10 to move together. If the receiving groove 14 is located on the base, the magnetic unit 20 is disposed on the base, and the coil 30 is disposed on the carrier 10. The magnetic force generated between the coil 30 and the magnetic unit 20 drives the coil 30 and the carrier 10 to move together.

[0036] The motor assembly 100 of this embodiment defines a receiving groove 14 with a clearance opening 141 and a groove wall 144. The groove wall 144 provides resistance and fixation for the magnetic unit 20, while the clearance opening 141 eliminates the limitations imposed by the receiving groove 14 on the size of the magnetic unit 20, such as its height and length. This allows the size of the magnetic unit 20 to be increased. As the size of the magnetic unit 20 increases, its magnetic field strength also increases, resulting in a stronger magnetic force between the coil 30 and the magnetic unit 20, thereby increasing the driving force of the motor assembly 100. Furthermore, due to the structure of the receiving groove 14 in this embodiment, the size of the carrier 10 and the base can be reduced to meet the same driving force requirements, thus reducing the size of the motor assembly 100 and facilitating miniaturization. In other words, the motor assembly 100 of this embodiment provides a greater driving force and a smaller size for the same driving force requirements.

[0037] In this embodiment, a receiving groove 14 is provided on the outer side of the carrier 10. Specifically, a receiving groove 14 is provided on the outer periphery of the carrier 10. It can be understood that in other embodiments, two, three or four receiving grooves 14 may be provided on the outer periphery of the carrier 10. Correspondingly, the number of magnetic units 20 and coils 30 may be increased or decreased adaptively according to the number of receiving grooves 14. This application embodiment does not specifically limit this.

[0038] In this embodiment, the receiving groove 14 includes a groove bottom 142 and two groove walls 144. The two groove walls 144 are spaced apart at both ends of the groove bottom 142 and extend along the optical axis O. The receiving groove 14 has two opposing clearance openings 141 along the extending direction of its groove walls 144. Thus, by defining the receiving groove 14 as including a groove bottom 142 and two groove walls 144, the receiving groove 14 has two opposing clearance openings 141, which is beneficial for the rational design of the shape of the magnetic unit 20.

[0039] Understandably, in other embodiments, the two groove walls 144 may also be adjacent and connected, in which case the receiving groove 14 has two adjacent and connected clearance openings 141. Alternatively, the receiving groove 14 may have one or three groove walls 144, and correspondingly, the receiving groove 14 may have three or one clearance opening 141. The specific configuration can be determined according to the actual situation, and this application embodiment does not impose any specific limitations on this.

[0040] Understandably, in other embodiments, the receiving groove 14 may also be triangular, pentagonal, hexagonal or other shapes, and this application embodiment does not specifically limit this.

[0041] To fix the magnetic unit 20, in this embodiment, at least one of the two ends of each groove wall 144 along its extending direction is provided with a stop portion 16 protruding towards the interior of the receiving groove 14. In this embodiment, each stop portion 16 extends to the groove bottom 142 in a direction perpendicular to the groove bottom 142. The magnetic unit 20 is correspondingly provided with a chamfered portion 21 adapted to the stop portion 16. The receiving groove 14 stops the magnetic unit 20 at the clearance opening 141 through the cooperation of the stop portion 16 and the chamfered portion 21. In this embodiment, each groove wall 144 has two stop portions 16, and each of the four corners of the magnetic unit 20 is provided with a chamfered portion 21 adapted to the corresponding stop portion 16. In this embodiment, the chamfered portion 21 is approximately a rounded chamfer, and the stop portion 16 is approximately a triangular rounded arc shape, wherein the triangular rounded arc shape can be understood as the hypotenuse of a right triangle being arc-shaped. Thus, by providing the aforementioned blocking portion 16 and chamfered portion 21, the magnetic unit 20 is fixed, ensuring that the magnetic unit 20 is stably placed within the receiving groove 14. Furthermore, by providing the aforementioned blocking portion 16, it is easier to guide and assemble the magnetic unit 20, improving the assembly convenience of the motor assembly 100.

[0042] Understandably, in other embodiments, when each groove wall 144 has a stop 16, the stop 16 on the two groove walls 144 can be arranged diagonally or on the same side; or, one groove wall 144 has one stop 16 and the other groove wall 144 has two stop 16. The specific setting can be made according to the actual situation, and the embodiments of this application do not specifically limit this.

[0043] Understandably, in other embodiments, the shape of the chamfered portion 21 can also be one of a straight chamfer, an asymmetrical chamfer, a multi-level chamfer, an irregular chamfer, or a three-dimensional chamfer, and the shape of the blocking portion 16 can be adapted accordingly. Understandably, when there are multiple blocking portions 16 and multiple chamfered portions 21, the shapes of the multiple blocking portions 16 may not be exactly the same, and the shapes of the multiple chamfered portions 21 may not be exactly the same. The specific design can be set according to the actual situation, and this application embodiment does not specifically limit this.

[0044] Understandably, in other embodiments, the projected thickness of the blocking portion 16 along the direction of movement of the carrier 10 is less than the projected thickness of the magnetic unit 20 along the direction of movement of the carrier 10. The thickness can be understood as the distance perpendicular to the bottom of the groove 142. Alternatively, each blocking portion 16 can be spaced apart from the bottom of the groove 142, or several blocking portions 16 can be spaced apart from the bottom of the groove 142 while the remaining blocking portions 16 extend onto the bottom of the groove 142; or several blocking portions 16 can be spaced apart from the bottom of the groove 142 while the remaining blocking portions 16 extend onto the bottom of the groove 142 in a direction perpendicular to the bottom of the groove 142, but the thickness of the blocking portion 16 is less than the thickness of the magnetic unit 20. It is only necessary to ensure that the blocking portion 16 can block the magnetic unit 20; this application does not specifically limit this aspect.

[0045] In this embodiment, the magnetic unit 20 includes a magnetizing element 22, a first magnet 24, and a second magnet 26. The first magnet 24, the magnetizing element 22, and the second magnet 26 are sequentially connected along the direction of movement of the carrier 10, and all three are connected to the bottom of the groove 142. The first magnet 24, the magnetizing element 22, and the second magnet 26 can all be glued to the bottom of the groove 142, and both the first magnet 24 and the second magnet 26 can be unipolar magnets. Thus, by setting the first magnet 24 and the second magnet 26, the first magnet 24 and the second magnet 26 generate electromagnetic interaction with the coil 30 to drive the magnetic unit 20 and the carrier 10 to move along the direction of movement of the carrier 10. The magnetizing element 22 further concentrates the magnetic force of the first magnet 24 and the second magnet 26, thereby enhancing the driving force of the motor assembly 100.

[0046] The first magnet 24 has chamfered portions 21 at its two corners facing away from the second magnet 26, and the second magnet 26 has chamfered portions 21 at its two corners facing away from the first magnet 24.

[0047] Understandably, in other embodiments, the first magnet 24, the magnetizing element 22, and the second magnet 26 can all be embedded in the bottom of the groove 142 by injection molding.

[0048] In this embodiment, the spacing L of the inner coils of the coil 30 along a predetermined direction is greater than or equal to the moving distance of the carrier 10. Thus, by limiting the spacing L of the inner coils of the coil 30 to be greater than or equal to the moving distance of the carrier 10, it is ensured that the magnetic unit 20 remains within the magnetic field range of the coil 30 when moving along the moving direction of the carrier 10. This ensures that the magnetic unit 20 can always generate effective electromagnetic interaction with the coil 30, preventing significant changes in the driving force of the motor assembly 100 and ensuring the stability of the driving force of the motor assembly 100.

[0049] Please see Figure 3 This application provides a second embodiment of a motor assembly 200. The motor assembly 200 of this embodiment is structurally similar to the motor assembly 100 provided in the first embodiment, except that in this embodiment, the magnetic unit 20 includes a magnetizing element 22, a first magnet 24, and a second magnet 26. The magnetizing element 22 is connected to the bottom of the groove 142, and the first magnet 24 and the second magnet 26 are connected along the direction of movement of the carrier 10, with both the first magnet 24 and the second magnet 26 connected to the side of the magnetizing element 22 facing away from the bottom of the groove 142. The magnetizing element 22 is generally plate-shaped, and the cross-sectional area of ​​the magnetizing element 22 parallel to the bottom of the groove 142 is greater than the sum of the cross-sectional areas of the first magnet 24 and the second magnet 26 parallel to the bottom of the groove 142. The first magnet 24 and the second magnet 26 are both glued to the magnetizing element 22. Four abutment portions 16 are spaced apart from the bottom of the groove 142 to allow space for accommodating the four corners of the magnetizing element 22. Understandably, the magnetizing element 22 can be embedded in the bottom of the groove 142 by injection molding.

[0050] Thus, by setting the first magnet 24 and the second magnet 26, the first magnet 24 and the second magnet 26 generate electromagnetic interaction with the coil 30 to drive the magnetic unit 20 and the carrier 10 to move along the direction of movement. By setting the magnetizing element 22, firstly, the magnetizing element 22 is connected to the bottom of the groove 142 to enhance the structural strength of the magnetic unit 20; secondly, the magnetizing element 22 is connected to both the first magnet 24 and the second magnet 26, which helps to further converge the magnetic force of the first magnet 24 and the second magnet 26, and helps to enhance the driving force of the motor assembly 200; thirdly, the magnetizing element 22 fixes the first magnet 24 and the second magnet 26 to the carrier 10, preventing the first magnet 24 and the second magnet 26 from shifting or falling off; fourthly, the first magnet 24 and the second magnet 26 are glued to the magnetizing element 22, which can effectively resist the risk of the first magnet 24 and the second magnet 26 shifting or falling off after movement.

[0051] In this embodiment, both the first magnet 24 and the second magnet 26 are bipolar magnets. Thus, by limiting the first magnet 24 and the second magnet 26 to bipolar magnets, the identification of magnetic poles during the assembly of the magnetic unit 20 can be avoided, which helps to reduce the assembly steps of the magnetic unit 20.

[0052] Understandably, in other embodiments, the receiving groove 14 may also be formed on the lower side of the carrier 10, and the carrier 10 can be used as an image stabilization support. Alternatively, the receiving groove 14 may be formed on both the lower side and the periphery of the carrier 10, and the carrier 10 can be used as both an image stabilization and focusing support. This application does not specifically limit this aspect.

[0053] Please see Figure 4This application provides a third embodiment of a motor assembly 300. The motor assembly 300 provided in this embodiment is structurally similar to the motor assembly 200 provided in the second embodiment, except that in this embodiment, the magnetic unit 20 includes a magnetizing element 22, a first magnet 24, a second magnet 26, and a magnetizing portion 28. The magnetizing element 22 is connected to the bottom of the groove 142. The first magnet 24, the second magnet 26, and the magnetizing portion 28 are sequentially connected along the direction of movement of the carrier 10, and are all connected to the side of the magnetizing element 22 facing away from the bottom of the groove 142. The projection of the magnetizing portion 28 along the direction of movement of the carrier 10 at least partially overlaps with the projection of the second magnet 26 along the direction of movement of the carrier 10. The magnetizing portion 28 is connected to the end of the magnetizing element 22. In this embodiment, the projections of the magnetizing portion 28 and the second magnet 26 completely overlap. Understandably, in other embodiments, the projection of the magnetizing part 28 may be smaller than the projection of the second magnet 26, and the blocking part 16 at the end of the two groove walls 144 corresponding to the magnetizing part 28 may be omitted. The blocking part 16 at the end of the two groove walls 144 away from the magnetizing part 28 is spaced apart from the groove bottom 142. Alternatively, a chamfered part 21 may also be provided on the magnetizing part 28, and the chamfered part 21 on the magnetizing part 28 may smoothly transition with the chamfered part on the corresponding magnet.

[0054] Thus, by setting the first magnet 24 and the second magnet 26, the first magnet 24 and the second magnet 26 generate electromagnetic interaction with the coil 30 to drive the magnetic unit 20 and the carrier 10 to move along the direction of movement of the carrier 10; by setting the magnetizing element 22, firstly, the magnetizing element 22 is connected to the bottom of the groove 142 to enhance the structural strength of the magnetic unit 20; secondly, the magnetizing element 22 is connected to both the first magnet 24 and the second magnet 26, which helps to further converge the magnetic force of the first magnet 24 and the second magnet 26, which helps to enhance the driving force of the motor assembly 300; thirdly, the magnetizing element 22 fixes the first magnet 24 and the second magnet 26 to the carrier 10, preventing the first magnet 24 and the second magnet 26 from shifting or falling off; by setting the magnetizing part 28, the first magnet 24 and the second magnet 26 are limited, ensuring the assembly accuracy of the first magnet 24 and the second magnet 26.

[0055] The magnetizing part 28 can be integrally formed with the magnetizing element 22.

[0056] Understandably, in other embodiments, the magnetizing part 28 may also be disposed between the first magnet 24 and the second magnet 26.

[0057] Understandably, in other embodiments, the positions of the first magnet 24 and the second magnet 26 may be interchanged, and this application embodiment does not specifically limit this.

[0058] The fourth embodiment of this application also provides a camera module (not shown). The camera module includes a housing (not shown), a lens unit (not shown), a photosensitive chip (not shown), and a motor assembly as described in any one of the first to third embodiments. This embodiment will be described using the motor assembly 100 described in the first embodiment as an example. The motor assembly 100 is disposed within the housing, the lens unit is disposed within the light-transmitting hole 12 of the carrier 10, and the photosensitive chip is disposed within the housing and located on the image side of the lens unit. The photosensitive chip is used to receive light passing through the lens unit for imaging.

[0059] In the camera module of this embodiment, the motor assembly 100 has a defined receiving groove 14 with a clearance opening 141 and a groove wall 144. The groove wall 144 blocks and fixes the magnetic unit 20, while the clearance opening 141 eliminates the limitation imposed by the receiving groove 14 on the size of the magnetic unit 20, such as its height and length. This allows the size of the magnetic unit 20 to be increased. As the size of the magnetic unit 20 increases, the magnetic field strength of the magnetic unit 20 increases accordingly, thereby increasing the magnetic force between the coil 30 and the magnetic unit 20, and thus increasing the driving force of the motor assembly 100. Furthermore, due to the structure of the receiving groove 14 in this embodiment, the size of the carrier 10 and the base can be reduced to meet the same driving force requirement, thereby reducing the size of the motor assembly 100, which is beneficial for meeting the miniaturization requirements of the camera module.

[0060] The fifth embodiment of this application also provides a terminal device (not shown). The terminal device includes the camera module described in the fourth embodiment. In this embodiment, the terminal device can be a mobile phone. It is understood that in other embodiments, the terminal device can also be a vehicle recorder, security monitoring equipment, AR device, VR device, vehicle, tablet computer, smartwatch, smart glasses, robot vacuum cleaner, or other devices with a camera module.

[0061] In the terminal device of this embodiment, the motor assembly 100 of the camera module has a defined receiving groove 14 with a clearance opening 141 and a groove wall 144. The groove wall 144 blocks and fixes the magnetic unit 20, while the clearance opening 141 eliminates the limitation imposed by the receiving groove 14 on the size of the magnetic unit 20, such as its height and length. This allows the size of the magnetic unit 20 to be increased. As the size of the magnetic unit 20 increases, the magnetic field strength of the magnetic unit 20 increases accordingly, thereby increasing the magnetic force between the coil 30 and the magnetic unit 20, and thus increasing the driving force of the motor assembly 100. Furthermore, due to the structure of the receiving groove 14 in this embodiment, the size of the carrier 10 and the base can be reduced to meet the same driving force requirement, thereby reducing the size of the motor assembly 100. This is beneficial for meeting the miniaturization requirements of the camera module and further meeting the requirements for a thinner and lighter terminal device.

[0062] It will be apparent to those skilled in the art that this application is not limited to the details of the exemplary embodiments described above, and that this application can be implemented in other specific forms without departing from the spirit or essential characteristics of this application. Therefore, the embodiments should be regarded as exemplary and non-limiting in all respects, and the scope of this application is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be embraced within this application.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application 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 solutions of this application without departing from the spirit and scope of the technical solutions of this application.

Claims

1. A motor assembly, characterized in that, include: The base has a receiving cavity; A carrier having a light-transmitting hole, the carrier being disposed in the receiving cavity and movably connected to the base, one of the carrier and the base having a receiving groove, the receiving groove having at least one clearance opening and at least one groove wall; A magnetic unit is disposed in the receiving groove, a portion of which extends to the clearance opening to increase the size of the magnetic unit, and another portion of which abuts against the groove wall; and A coil, corresponding to the magnetic unit, is disposed in the other of the carrier and the base, and is used to generate magnetic force with the magnetic unit to drive the carrier to move.

2. The motor assembly as claimed in claim 1, characterized in that, The receiving groove includes a groove bottom and two groove walls, the two groove walls being spaced apart at both ends of the groove bottom, and the receiving groove having two opposing clearance openings along the extending direction of its groove walls.

3. The motor assembly as claimed in claim 2, characterized in that, At least one of the two ends of each groove wall along its extension direction is provided with a blocking part protruding towards the interior of the receiving groove, and the magnetic unit is provided with a chamfered part adapted to the blocking part. The receiving groove blocks the magnetic unit at the clearance opening through the cooperation of the blocking part and the chamfered part.

4. The motor assembly as claimed in claim 3, characterized in that, The chamfered portion is one of the following: straight chamfer, asymmetrical chamfer, circular arc chamfer, multi-level chamfer, irregular chamfer, or three-dimensional chamfer.

5. The motor assembly as claimed in claim 3, characterized in that, The projected thickness of the blocking part along the direction of movement of the carrier is less than the projected thickness of the magnetic unit along the direction of movement of the carrier.

6. The motor assembly as claimed in claim 1, characterized in that, The magnetic unit includes a magnetizing element, a first magnet and a second magnet, and the receiving groove includes a groove bottom; The magnetizing element is connected to the bottom of the tank, and the first magnet and the second magnet are connected along the direction of movement of the carrier, and both are connected to the side of the magnetizing element away from the bottom of the tank; or, The first magnet, the magnetizing element, and the second magnet are connected sequentially along the direction of movement of the carrier, and are all connected to the bottom of the trough.

7. The motor assembly as claimed in claim 1, characterized in that, The receiving groove includes a groove bottom, and the magnetic unit includes a magnetizing element, a first magnet, a second magnet, and a magnetizing part. The magnetizing element is connected to the groove bottom. The first magnet, the second magnet, and the magnetizing part are connected sequentially along the movement direction of the carrier, and are all connected to the side of the magnetizing element away from the groove bottom. The projection of the magnetizing part along the movement direction of the carrier at least partially overlaps with the projection of the second magnet along the movement direction of the carrier.

8. The motor assembly as claimed in claim 1, characterized in that, The spacing between the inner coils of the coil along the direction of movement of the carrier is greater than or equal to the distance of movement of the carrier.

9. A camera module, characterized in that, The device includes a housing, a lens unit, a photosensitive chip, and a motor assembly as described in any one of claims 1 to 8, wherein the motor assembly is disposed within the housing, the lens unit is disposed within the light-transmitting hole, and the photosensitive chip is disposed within the housing and located on the image side of the lens unit.

10. A terminal device, characterized in that, Includes the camera module as described in claim 9.

Images